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    <title>Singularities</title>
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    <id>tag:blogs.physicstoday.org,2010-07-15:/singularities//17</id>
    <updated>2011-06-13T17:44:20Z</updated>
    <subtitle>Reports about the physical sciences community</subtitle>
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<entry>
    <title>Embracing physics as a returning student</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/06/embracing-physics-as-a-returning-student.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.7105</id>

    <published>2011-06-07T20:25:01Z</published>
    <updated>2011-06-13T17:44:20Z</updated>

    <summary><![CDATA[By Toni Feder With a strict schedule, chutzpah, determination, and focus, a nontraditional student takes on physics&mdash;and a lot of other things. Over the past year, K. Renee Horton published her first book of poetry, brought science into several Alabama...]]></summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Careers and employment" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Education" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p>By Toni Feder</p>

<p><strong>With a strict schedule, chutzpah, determination, and focus, a nontraditional student takes on physics&mdash;and a lot of other things.</strong></p>

<p>Over the past year, K. Renee Horton published her first book of poetry, brought science into several Alabama primary schools, took her eighth grader&mdash;the youngest of her three children&mdash;to the hairdresser in preparation for the prom, was voted chair-elect of the American Physical Society's forum on graduate student affairs, and served on the organizing committee for the International Conference on Women in Physics that was held in South Africa in April.</p>

<p>All the while, Horton was finishing her doctoral dissertation on self-reacting friction stir welding of dissimilar aluminum alloys. She defended her thesis in April, becoming the first African American to earn a PhD in materials science at the University of Alabama.</p>

<p>In May, Horton told <em>Physics Today</em>'s Toni Feder about her path as a nontraditional student: How she juggles her many activities, how her lifelong ambition to become an astronaut was dashed, and what it's like being a minority woman in physics. She also discusses her wish to stay in research and her current job search. Now almost 40, Horton maintains that she wouldn't have wanted to switch the order of having family and focusing on her career. </p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Renee_Horton.jpg" src="http://blogs.physicstoday.org/singularities/Renee_Horton.jpg" width="300" height="479" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Tell me a bit about your background. </p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I graduated out of our gifted program in high school in Baton Rouge, Louisiana, when I was 16. I did two years of college at Louisiana State University [LSU]. By the time I was 18, I noticed that all the women I was working with were either not married or did not have children. I come from a very family-oriented family&mdash;my mother wanted to know how long I would take to go to school, and when she would have grandchildren. </p>

<p>So, I decided to marry the guy I was dating. We had my two sons, and I followed his career. He was in the military, and we spent time in Germany. While we were overseas, I got DA&mdash;Department of the Army&mdash;training and a photography job. Back in Georgia, I did family photography for Sears for three years. At that time my first husband and I separated, and I moved back to Louisiana with my boys, who were six and four. Then I got a medical assistant certificate. I taught at a vocational school and worked for a podiatrist. Later, after my daughter came, I realized I really needed to go back to school and do what my initial calling was, science.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How did you do it?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> In 2000, I went back to LSU. In 2002, I graduated with a bachelor's in electrical engineering. I had had this big dream that I would be an astronaut. But I found out at 18, the first time I went to college, that no, I couldn't be an astronaut or pilot. I had planned to major in aeronautical engineering and then apply to NASA's astronaut program, but when I went for my medical exam with the [US] Air Force I was disqualified because of my hearing impairment.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Had you not known you had a hearing impairment?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> Technically, no. I was actually classified retarded in elementary school. I went through speech therapy for a couple of years, and the therapist recommended I be tested for the gifted program. My hearing loss is "cookie cutter," where my hearing at high and low frequencies is fine, but I don't hear well in the speech range. </p>

<p>Anyway, when I went back to school, I got my books and tuition paid through what they call vocational rehabilitation. They also paid daycare. So between financial aid, student loans, and my scholarship from rehab, I went back to school.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Were you able to support yourself and your kids on that?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> We lived very meagerly. The boys shared a bedroom, my daughter had a bedroom, and my bed was in the living room. We drew out of a hat once a month for our one big activity each month. And only one child did an extracurricular activity each year. That is how we functioned for two and a half years. </p>

<p>We were already poor and used to it, so I decided to continue in school and do my master's in physics at Southern University [in Baton Rouge]. I did not complete the master's.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Why not?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I came to Alabama one summer for a materials science program, and I met a professor who I ended up working with for a couple of years, who said, "You don't have to have a master's; you can just get a PhD." Before I left the program at the end of the summer, the University of Alabama had got me approved for a fellowship. I went back to finish my master's first. But I actually got robbed, and my thesis was stolen. I was frustrated, and in December 2004 I moved to Alabama. My life changed completely.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How did your life change?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I got involved in international activities with women in physics. One day I was googling, and found something about the International Conference of Women in Physics. I wanted to go. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> In 2005, that would have been the second such conference sponsored by the International Union of Pure and Applied Physics (IUPAP), and held that year in Brazil. What was your next move?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I contacted the US organizers; they said the team had already been formed. I pointed out that there were no African Americans on the team. I felt I would be a great representative for them&mdash;I was a nontraditional student, very mature. But they said no. So I contacted the conference organizers. I wanted to know if I could bring a minority team from the US. They said yes. The National Society of Black Physicists and my university supported me, and I put together a team of five African American and Hispanic women. Well, then Beverly Hartline [a leader for the US team] called me and said, "It looks bad for the US to have two teams." So we got together and merged the teams. That was my introduction into politics for women and in the international field.</p>

<p>I went to [South] Korea in 2008 as a US team leader. And in 2010 Beverly Hartline called me and asked if I would be interested in serving on IUPAP's working group on women in physics. Without knowing what that entailed&mdash;helping plan the international conference [held this past April in South Africa]&mdash;I said yes.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> You have also been involved in outreach.</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I established a program called MINT Soup [MINT is short for "materials for information technology"]. We went out to several schools serving largely African American kids. I would have professors and students give talks and do demonstrations. We also started science clubs at the schools. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How important is outreach to you? </p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> On a scale of 1 to 10, I would give it a 9.5. For kids coming from the African American community, if their parents are uneducated, a lot of the time they only know what the media shows them. I want them to know that there are other things than being an athlete or a rapper&mdash;those are things that are glorified on television. You can be a brilliant scientist who studies butterflies, if that's what you want to do. It's very important to me, especially for little black girls, that they know they have other options. They don't have to be a nurse.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> All this time, you had also been working on your PhD. What was your research topic?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> NASA paid for six years of my graduate education. After my second summer internship, I went to NASA's Marshall Space Flight Center and said, "I would like to give back to NASA. Is there something you need to be solved?" The guys in my group said, "We think we have a problem you can have." I had been working in nanomaterials. The NASA problem was on self-reacting stir welding. It became my dissertation.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Tell me about self-reacting stir welding, what you did, and why it's important.</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I went in and investigated the basic microstructure of materials that were welded together by the self-reacting stir welding process. It had been developed by NASA in 1991, but no one had detailed it. I used a three-dimensional image correlation system to look at tensile strength. I looked at strain and material failure. The significance is in knowing how a material will fail. What I showed is that whereas fractures usually occur on the retreating side of the weld, if there is a flaw on the advancing side, then the fracture would occur there. Even with cracks, you can say a machine is operable. My work helps to predict failure.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> So how do you manage so many activities in addition to your studies?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I have a very strict schedule. And if something is not on the calendar, I don't do it. My daughter moved in with my mom while I was writing my dissertation, and by then my two older boys had moved out. I got up at 6, had coffee, worked out, showered, and from 8 to 12 worked on my dissertation. After lunch, I kept writing. If I didn't feel I had got enough done during the week, then I worked half a day on Saturday and then went out for a ride on my motorcycle. On Sunday, I would go to church and then be back at it [the dissertation] by 5 o'clock.</p>

<p>I am finishing revisions to the dissertation and collecting proceedings for IUPAP. IUPAP takes precedence now. On a normal day, I send out thank-yous for any submissions I receive, and I file them directly from my phone. Then I send out reminders [to people who have yet to send in their submissions]. Then I eat lunch. After lunch, I do whatever activity is scheduled for that day&mdash;right now that is filling out applications for jobs. From 4:30 to 6:30 I skype with my daughter and help her with homework. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Do you identify more as a black physicist or as a woman physicist?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I can walk into a room full of women, and nobody cares that I am a woman, but you know I am African American. If it's a room full of men, they care that I am a woman. I have learned that if you fight for one, you are fighting for both. And I have found that being a person with a disability is a bigger challenge. Since you can't see that I am hearing impaired, when I say I need accommodation, I get that look.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What are your plans for the future?</p>

<p><span style="color:#006699"><strong>HORTON:</strong></span> I want to stay in research. It could be industry or academia. I have an offer to be a postdoc in South Africa, but if I take that, it would be mostly for the international experience. I have been paid well as a NASA fellow, and it's kind of hard to take a postdoc that pays less. But I love being a scientist. I love everything to do with it, even the struggles&mdash;like getting the degree&mdash;they have made me who I am. If I could somehow get into medical research, I would love that. I also have a passion for science policy.<br />
</p>]]>
        
    </content>
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<entry>
    <title>EGU 2011: Geodetic and inundation models of the Tohoku earthquake and tsunami</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/05/egu-2011-tohoku-2011-earthquake-geodetic-and-inundation-models-of-the-shock-heard-round-the-world.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6940</id>

    <published>2011-05-23T20:30:33Z</published>
    <updated>2011-05-23T21:07:01Z</updated>

    <summary> The recent meeting of the European Geosciences Union in Vienna included a session on the March 2011 Tohoku earthquake. Don Dingwell, the EGU president, introduced the session as the geoscientific community&apos;s way of paying respect and expressing condolences to...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Earth sciences" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Fluids and rheology" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Figure4.jpg" src="http://blogs.physicstoday.org/singularities/Figure4.jpg" width="121" height="122" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span> The recent meeting of the European Geosciences Union in Vienna included a session on the March 2011 Tohoku earthquake. Don Dingwell, the EGU president, introduced the session as the geoscientific community's way of paying respect and expressing condolences to the victims of March's seismic events. With researchers around the world doing their &#8220;best science to characterize and understand [the events],&#8221; he said, &#8220;we will move forward in mitigation, in the best possible way.&#8221;</p>

<p>James Daniell of <a href="http://earthquake-report.com">Earthquake-Report</a> pointed out that before the Tohoku earthquake, there had been a downward trend in economic losses from earthquakes since 1900. Over the last month, GPS surveys and geodetic models have provided some insight into the quake and subsequent tsunami that caused an unprecedented loss of life.</p>

<p>Another of the session speakers, Hiroshi Sato of the <a href="http://www.eri.u-tokyo.ac.jp/eng/">Earthquake Research Institute</a>, noted, &#8220;The Tohoku earthquake [occurred in] a classic example of a trench arc&ndash;back arc system.&#8221; Trench arcs are formed when a heavy tectonic plate moves beneath a more buoyant one. The movement causes magma to rise and form an arc-shaped chain of volcanoes. As the crust extends, back arc basins form on the opposite side of the arc. Back arc spreading is the process that separates the Japanese islands from mainland Asia.</p>

<p>As the Pacific plate moves westward and subducts under the Okhotsk plate, Japan's coastal area undergoes subsidence while the area further inland, near the volcanic crest, experiences uplift. The arc is relatively stable, but has been lifting at a rate of 0.3&ndash;0.6 mm/year since the Pliocene epoch, according to Sato. The side of the arc nearest the Pacific plate sinks due to compressional deformation. Although the plate is creeping westward at 80&ndash;90 mm/year, an earthquake occurs when there's a bigger, faster slip than normal. The sudden and large deformation of the sea floor that ensues leads to tsunamis.</p>

<p>A bigger, faster slip than normal happened in the subduction zone at 38&deg; N on 11&#160;March 2011 and caused a displacement of 5 m to the east and 1 m to the south, according to Teruyuki Kato, also of the University of Tokyo. Half an hour later, the largest aftershock at 36&deg; N caused a shift of 0.1 m east and 0.1 m south. And the maximum offset reached 20 m during the main shock and 1.5 m in the aftershock.</p>

<p>Sato explained that &#8220;a large amount of strain release is needed along the interface to create this scenario.&#8221; Understanding the process of strain buildup and release in the subduction zone is critical for evaluating the risk of a subduction zone &#8220;megathrust&#8221; quake&#151;that is, magnitude 9.0 or greater&#151;and Andreas Hoechner of the <a href="http://www.gfz-potsdam.de">GFZ German Research Centre for Geosciences</a> has been developing a model to do just that.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="slip.jpg" src="http://blogs.physicstoday.org/singularities/slip.jpg" width="375" height="564" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>By examining GPS data for the 22 earthquakes that occurred in this region over the past century, Hoechner determined whether the plates are sliding or have been locked in place over the years. &#8220;Locking is very high on this [the Tohoku epicienter] location,&#8221; he said. &#8220;There's lots of deformation and lots of slip accumulates.&#8221; Slip is the amount of relative motion of the plates at the contact interface of the plates during the earthquake.  When plates are locked, strain builds up as they push against each other and deform.  This results in a slip deficit, which is potentially released during an earthquake although the situation may be stable for centuries. The Tohoku earthquake ruptured offshore from Sendai in the region that showed over 75% locking.</p>

<p>To calculate the slip distribution, Hoechner's model uses the coseismic displacement&mdash;that is, the difference between the GPS information (30-minute-interval kinematic solution from onshore measurements) before and after the main shock. To test the procedure, he makes a baseline model using minimal slip, then adds noise to three separate slip areas and to a smooth slip distribution. &#8220;The offshore part is not very well resolved,&#8221; he said. Simulating the offshore part by breaking it into 216 subfaults on a curved surface, he inverts the GPS data for a slip and shows a maximum slip of 36 m. </p>

<p>Deformation at the sea floor also uplifts a water column to the sea surface and is calculated by the slip model. Whereas Hoechner calculated a maximum uplift of 9 m, which can then be used as an initial condition for a tsunami model in which gravity drives water dissipation, Kato stressed that more ocean bottom measurements are needed to provide data about both locking and floor deformation. </p>

<p>A tsunami early warning system is one very important goal of understanding the subduction region locking conditions. Deepak Vatvani of <a href="http://www.deltares.nl/en">Deltares research institute</a> specified that the most important thing is &#8220;how fast you can tell people the inundation possibility once you know the propagation.&#8221; </p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="inundation.jpg" src="http://blogs.physicstoday.org/singularities/inundation.jpg" width="400" height="546" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Once the initial conditions of the tsunami are known, Vatvani doesn't need very high resolution data to model how far the waves will propagate. But predicting the inundation requires high-resolution data and intensive computation. By the time standard models calculate the inundation of an oncoming tsunami, it would be too late to be useful in a warning system, even though the calculations agree with measured wavelengths and heights.</p>

<p>To speed things up, Vatvani uses a propagation grid that is generated from a simulated wave and translates it to a finer grid using an empirical formula derived from hundreds of different topographies. This gives him a faster way of estimating tsunami heights on the shore. &#8220;We would compare this with satellite data, but the satellite only shows water left behind and not the rate,&#8221; he said, adding that we &#8220;can't predict inundation based on earthquake magnitude alone.&#8221; The Sumatra 2004 earthquake was comparable in magnitude to Tohoku 2011, but Tohoku ruptured over a shorter geographic region so the waves were much higher. Japan knew a tsunami was coming, but not how large it would be.</p>

<p>Does all of this mean that more earthquakes will happen in the near future due to aftershocks? &#8220;We're drawn to think that there's periodicity [in earthquake behavior], but studies have shown that earthquakes are capricious,&#8221; said Emile Okal of Northwestern University's <a href="http://www.earth.northwestern.edu/">department of Earth and planetary sciences</a>. Earthquakes are expected around active subduction zones, but stress transfer at a plate boundary becomes complicated. And other sources of stress may or may not be involved in earthquake triggers.</p>

<p>No matter how comprehensive our models and warning systems become, Okal reminded the EGU audience that &#8220;an earthquake takes time to prepare, like good food. It can start small and grow bigger. No matter how good these plans might seem, we shouldn't try to outsmart Mother Nature.&#8221;</p>

<p>Rachel Berkowitz<br />
</p>]]>
        
    </content>
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<entry>
    <title>EGU 2011: An outdoor volcano laboratory; lots of questions, and a few answers</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/04/egu-2011-an-outdoor-volcano-laboratory-lots-of-questions-and-a-few-answers.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6939</id>

    <published>2011-04-28T15:40:14Z</published>
    <updated>2011-04-28T15:41:15Z</updated>

    <summary> Surface activity at Mount Stromboli, the volcano on the small island of Stromboli off the north coast of Sicily, has been recorded in detail for a thousand years. The volcano&apos;s long-lasting eruptive state consists of explosions from the summit...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Earth sciences" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Fluids and rheology" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Figure4.jpg" src="http://blogs.physicstoday.org/singularities/Figure4.jpg" width="121" height="122" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span> Surface activity at Mount Stromboli, the volcano on the small island of Stromboli off the north coast of Sicily, has been recorded in detail for a thousand years. The volcano's long-lasting eruptive state consists of explosions from the summit that recur at intervals of minutes to hours and regular emissions of gas that last about 100 years. Occasionally, the steady state is punctuated by large eruptions or lava flows.</p>

<p>The wealth of data on Stromboli, past and present, provided ample material for a discussion at the general assembly of the European Geosciences Union, which was held earlier this month in Vienna.</p>

<p>As volcano models are developed further, questions about the small-scale processes that drive the large-scale phenomena observed at Stromboli focus on ever more specific causes and effects. Frances Beckett and Fred Witham of the University of Bristol's <a href="http://www.gly.bris.ac.uk/">department of Earth sciences</a> want to know why the gas content measured coming out of the volcano amounts to "a lot more than what should be there," based on subsurface melt volatile content.</p>

<p>In the prelude to a volcanic eruption, magma that contains dissolved volatiles is stored in a deep surface reservoir. The magma may already be supersaturated, or it may become supersaturated as it decompresses on its way through a conduit to the surface. Bubbles nucleate and grow as the magma rises. Bubble growth drives the magma to accelerate and potentially fragment into separate pieces. Fragmented magma leads to an explosive eruption; nonfragmented magma leads to an effusive lava flow. In the case of Stromboli, gas coalesces into slugs that burst near the top of the conduit and drive the magma upward, ejecting <a href="http://en.wikipedia.org/wiki/Tephra">tephra</a> and incandescent cinder.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="stromboli.jpg" src="http://blogs.physicstoday.org/singularities/stromboli.jpg" width="440" height="396" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Beckett cited an ongoing, nonexplosive sulfur dioxide output of 200 tons per day from the Stromboli volcano. The magma melt, however, contains just 0.28% sulfur.<sup><a href="#ref1">1</a></sup> Said Beckett, "50&thinsp;000 tons per day of melt needs to degas to account for this output, but there is no significant [volume] eruption of magma"&mdash;which is why Stromboli's persistent degassing is such a puzzle.</p>

<p>"We know that magma must come to the surface to degas, but then where does it go if it is not erupted?" she asked. The answer she presented at the EGU meeting involves flows driven by density differences: Buoyant gas-rich magma ascends and degasses near the surface, becomes less buoyant as a result, and then descends to the subsurface reservoir.</p>

<p>Beckett looks to golden syrup to find out how this exchange flow might behave. Her setup consists of two tanks, one above the other, connected by a vertical pipe. By adding water to the syrup, she can alter its density and viscosity. At the beginning of an experimental run, the top tank contains dense syrup, while the bottom tank contains less dense syrup.</p>

<p>Within the pipe, two flow regimes occur: for viscosity ratios less than 100, a side-by-side flow occurs in which both fluids are in contact with the pipe walls and share a single interface. For viscosity ratios greater than 100, the buoyant fluid occupies a cylindrical core and the denser fluid flows downward in an annulus.</p>

<p>Beckett's model shows that transition between flow regimes occurs at 200 MPa when the melt viscosity is set by Strombolian melt composition and crystallinity. Numbers in hand, she calculates the conduit radius and magma volume flux at Stromboli. "But we don't understand why different flows occur at different viscosity ratios," said Beckett. Nor does she yet know what may happen when an ongoing exchange flow is disturbed&mdash;say, by a gas slug that drives a volume of magma to erupt.</p>

<p>Witham had hoped to use Beckett's study to constrain the flux through the conduit in his model, which predicts the time-dependent fluxes and compositions of volcanic gases emitted from Stromboli. He determines magma crystal content based on changes in pressure and volatile content, then calculates how much volatile material gets exsolved, the material's composition, and the resulting magma rheology. "One main difficulty," he explained, "is that the up-welling and down-welling magmas can potentially mix, and certainly expand dramatically due to conduit convection."</p>

<p>To deal with that difficulty, Witham assumes that what goes up must come down, minus the exsolved gas, and that at some pressure the magma reaches its eutectic point&mdash;that is, the composition at which it solidifies (well, becomes extremely viscous). This magma plug acts as a permeable lid, below which a "conveyor belt" or exchange flow occurs. </p>

<p>Beckett and Witham use observations of gas emissions and melt inclusions at Stromboli to support a theory of conduit dynamics in a volcanic system. But they don't look at deep surface processes or what happens once the volatile-rich magma fragments and solidifies into rock on its way out of the vent.</p>

<p>Michael Manga, a geophysicist in the <a href="http://eps.berkeley.edu/">department of Earth and planetary science</a> at the University of California, Berkeley,  and recipient of the EGU 2011 Robert Wilhelm Bunsen Medal, noted at the EGU meeting that "Stromboli erupts more gas than liquid, and water separates from the melt on the way to the surface." To explain the eruptive activity, the vertical conduit must be coupled to a deep  magma-filled chamber.<sup><a href="#ref2">2</a></sup></p>

<p>Manga also explained how fast and how far pyroclastic flows in explosive eruptions travel once they've escaped the volcano vent, based on the generation of ash particles through particle interactions, steam generation when flows enter the ocean, and the role of boundary conditions.</p>

<p>"But the motivation is not [to understand] every tiny detail," Manga added. Rather, it's explaining processes that cause certain outcomes. And while hazard mitigation is not a huge driving factor for volcanic process research, a reliable model of coupling between surface measurements and deep surface processes could provide a way of predicting what might happen in future eruptions.</p>

<p>Rachel Berkowitz</p>

<p><strong>References</strong></p>

<ol>
<a name="ref1"></a><li>M. Burton et al., <a href="http://www.sciencemag.org/content/317/5835/227.abstract"> <em>Science</em> <strong>317</strong>, 227 (2007)</a>.
<a name="ref2"></a><li>H. M. Gonnermann, M. Manga, <a href="http://www.annualreviews.org/doi/abs/10.1146/annurev.fluid.39.050905.110207"><em>Annu. Rev. Fluid Mech. </em> <strong>39</strong>, 321 (2007)</a>.
</ol>
]]>
        
    </content>
</entry>

<entry>
    <title>EGU 2011: The slippery slope of alpine glaciers, permafrost, and newly formed lakes</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/04/egu-2011-the-slippery-slope-of-alpine-glaciers-permafrost-and-newly-formed-lakes.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6938</id>

    <published>2011-04-13T19:27:30Z</published>
    <updated>2011-04-27T18:17:17Z</updated>

    <summary> On the morning of 11 April 2010, the residents of Carhuaz, Peru, received a chilling reminder that warming effects are at work in the high mountains. Far above the town on the southwest slope of Nevado Hualcan (6104 m),...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Earth sciences" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Fluids and rheology" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Figure4.jpg" src="http://blogs.physicstoday.org/singularities/Figure4.jpg" width="121" height="122" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span> On the morning of 11 April 2010, the residents of Carhuaz, Peru, received a chilling reminder that warming effects are at work in the high mountains.  Far above the town on the southwest slope of Nevado Hualcan (6104 m), an avalanche of rock and ice tumbled from hanging ice glaciers into a lake known as Laguna 513. </p>

<p>The impact caused the entire lake volume to oscillate in a so-called push-wave. After crossing the lake, the 25-meter-high wave spilled over its natural dam, sending a cascade of water and debris down the slope toward Carhuaz. The damage was severe, but no one was killed.</p>

<p>"We know very little about the physical processes that started [the Nevado Hualcan avalanche]," said Wilfried Haeberli of the University of Z&uuml;rich's <a href="http://www.geo.uzh.ch/en/units/physical-geography-3g/">geography department</a>.  But  geoscientists are forging ahead with new studies on the individual but inseparable factors that created this event, namely warming effects on ice and rock avalanches, permafrost, and new glacial lake formation.</p>

<p>At the general assembly of the European Geosciences Union, which was held earlier this month in Vienna, Haeberli was among several experts who spoke about climate change in alpine regions.</p>

<p>John Clague, a quaternary geologist and geomorphologist at Simon Fraser University in Burnaby, British Columbia, cited the thinning and retreat of glaciers as the most studied climatically-induced change in the alpine environment.  According to models developed for the Intergovernmental Panel on Climate Change, the areal extent of glaciers in many mountain ranges has shrunk by 20&ndash;30% since the late 1800s. By 2050, the European Alps' glacial area is forecast to shrink by another 20&ndash;50%.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="muir_glacier.jpg" src="http://blogs.physicstoday.org/singularities/muir_glacier.jpg" width="484" height="585" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Clague pointed out that rock slopes that have been steepened by glacial erosion can break apart in avalanches once the glaciers that buttressed them retreat. But glaciers aren't the only glue that holds the mountains together, and rock avalanches aren't the only effect of retreating glaciers. </p>

<p>Warming permafrost is considered by Haeberli to have played a role in the Nevado Hualcan avalanche. Defined as soil at or below 0&deg;C, permafrost can form if the mean annual air temperature is around &minus;3&deg;C.  Thermal conduction and advection can warm bedrock enough to thaw permafrost. "Permafrost is involved in recent rockfalls on Monte Rosa [in the Swiss Alps]," said Clague, but its effect is difficult to "untangle from glacial release of rockfall."</p>

<p>Thawing permafrost not only reduces the support structure of rock that had been effectively frozen in place but, once thawed, leads to standing water within the rock formation. The freeze&ndash;thaw cycle of this standing water from the surface down elevates the pressure on water deeper in the rock, which, when it occurs on a repeated basis, weakens the rock.</p>

<p>"The distribution of alpine permafrost is very patchy and is not controlled by latitude," noted Clague, adding that the topography and type of bedrock on which permafrost forms is hugely complicated.  Sina Schneider, a PhD student at the University of Fribourg's <a href="http://www.unifr.ch/geoscience/geographie/home/doku.php">geography department</a> in Switzerland, is beginning to quantify the dependence of mass and energy fluxes on the different materials and textures in which permafrost forms.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="lesdrus.jpg" src="http://blogs.physicstoday.org/singularities/lesdrus.jpg" width="300" height="311" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Schneider's sample site is a 1-km<sup>2</sup> section of slope in the Murtel-Corvatsch area, Upper Engadin, Switzerland.  Ten boreholes are drilled 6 m deep in subsurface materials including rock glaciers, scree, and coarse- to fine-grained bedrock.  All are subject to the same climate and atmospheric conditions, and are drilled at the same exposition and slope angle.  "Previous studies looked at boreholes that were [geographically] far apart," Schneider explained.  Any changes in her study "will not be due to microclimates.  It must be the influence of the subsurface [materials.]"</p>

<p>Temperature and ice content in the boreholes have been logged twice daily for eight years.  A simple thermistor measures the temperature, while ice content is calculated based on the resistivity and velocity of artificially generated pressure waves.  The subsurface temperatures and calculated thermal diffusivities (ratio of conductivity to heat capacity) do indeed depend on the material: Subsurface temperature of the rock glacier is strongly influenced by its ice content, as ice-rich material has more efficient heat transfer due to its high temperature gradient. The bedrock site changes temperature more rapidly than the rock glacier site, and displays efficient heat transfer due to high conductivity.  Fine-grained bedrock exhibits the largest cumulative temperature change.</p>

<p>"You need a long time scale, 20 years at least, if you want to use permafrost as a climate indicator," Schneider added. "And deeper boreholes to have a stable signal."</p>

<p>Not only do subsurface-dependent permafrost and retreating glaciers lead to unstable slopes that can cause avalanches like the one into Laguna 513 above Carhuaz, but the chances of an avalanche landing in an alpine lake might be increasing.  Laguna 513 started to form in only the 1980s, according to Haeberli.  Overdeepenings in current glacial beds are thought to be leading to the formation of similarly new lakes as the glaciers retreat and newly exposed carved bedrock fills with water.</p>

<p><strong>Modeling glacier evolution</strong></p>

<p>Haeberli's Z&uuml;rich colleague Andreas Linsbauer subtracts modeled ice thickness distributions from a surface digital elevation model (DEM) to derive glacier bed topography.  He uses this information to model future glacier evolution and areas of overdeepening.  "A large glacier with a big tongue has potential for more overdeepening," Linsbauer said. </p>

<p>Geomorphological characteristics of glacier beds of all Swiss glaciers detected 600 overdeepenings, 3% of which are larger than 0.5 km<sup>2</sup> and coveri a total area of 50 to 60 km<sup>2</sup>.  Assuming that current trends of glacier decline continue, 60% of the potential lakes would appear within the first half of this century.  But how many would actually fill with water is a different question.</p>

<p>The glacial lakes described by Linsbauer's model "can form anywhere," said Clague, and potentially "far from existing lakes." Ice has already carved the basins, and "eventually the glacier will retreat out of the basin and leave the lake behind." Linsbauer pointed out that new lakes could even be used for hydropower production, but they pose a serious hazard potential as they emerge in an increasingly destabilised environment&mdash;which Nevado Hualcan and Laguna 513 certainly illustrate. </p>

<p>Clague sees studies of glacier retreat, permafrost, avalanches, and glacial lakes not only as scientifically interesting studies of the processes that shape our planet, but also as contributing to more comprehensive models and a forecasting system for changing climate.  But the people of Carhuaz would probably agree with Haeberli's assessment that new hazard prevention methods are needed soon.  And they wouldn't be referring to "soon" on a geological timescale.</p>

<p>Rachel Berkowitz<br />
</p>]]>
        
    </content>
</entry>

<entry>
    <title>EGU 2011: Effects of aerosols on the East Asia summer monsoon  </title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/04/egu-2011-effects-of-aerosols-on-the-east-asia-summer-monsoon.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6907</id>

    <published>2011-04-06T14:53:15Z</published>
    <updated>2011-04-27T18:19:06Z</updated>

    <summary>When it rains, it pours. But where and how much it pours over China, North and South Korea, and Japan during the East Asian summer monsoon (EASM) is changing. As East Asia&apos;s economy grows, so do its emissions of carbon...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Earth sciences" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Figure4.jpg" src="http://blogs.physicstoday.org/singularities/Figure4.jpg" width="121" height="122" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span>When it rains, it pours. But where and how much it pours over China, North and South Korea, and Japan during the East Asian summer monsoon (EASM) is changing.</p>

<p>As East Asia's economy grows, so do its emissions of carbon and sulfur. The associated aerosols scatter and absorb solar radiation and modify the radiative properties of clouds. Those modifications, in turn, cause shifts in the monsoon patterns that affect the agriculture of one of the world's leading producers of rice and wheat.</p>

<p>Whether aerosols by themselves are responsible for the change in EASM behavior was one of the topics discussed at this year&#8217;s <a href="http://meetings.copernicus.org/egu2011/">general assembly</a> of the European Geosciences Union, which was held this week in Vienna, Austria.</p>

<p>The EASM is a seasonal change in atmospheric circulation and precipitation associated with asymmetric heating of the land and the sea. As the air over East Asia warms, it rises and creates a low-pressure area, which draws cool moist ocean air toward it. This inward movement generally leads to a predictable precipitation increase in July and August. </p>

<p>For the last three decades, however, the summer rain belt has shifted toward the south. Northern China has seen a drought in recent years while southern China has seen floods. Speaking at the EGU meeting, Jianping Li of the Institute of Atmospheric Physics, Chinese Academy of Sciences, pointed out that &#8220;the primary response of the EASM to global warming may be a southward shift of the rain belt, instead of an intensity change.&#8221;</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="figure_1.jpg" src="http://blogs.physicstoday.org/singularities/figure_1.jpg" width="400" height="302" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>&#8220;The maximum surface warming [increase up to 0.7&deg;C over the past 30 years] occurs over high- to mid-latitudes [45&deg;N&ndash;60&deg;N],&#8221; explained Li. In the past, the highest temperatures occurred at lower latitudes. The warming rate that Li refers to is a change in temperature with time experienced in the north but not in the south. Because temperatures in the north are increasing while those in the south have remained relatively constant, there is a reduction in the pressure gradient, with the result that the moisture-laden sea air does not appear to be getting as far north as has been observed in the past. So rain now falls farther south although the average precipitation over the entire monsoon region remains the same.</p>

<p>Li uses models developed by the <a href=http://www.ipcc.ch>Intergovernmental Panel on Climate Change</a> to investigate how surface temperature and the resulting monsoon patterns respond to anthropogenic and natural forcing. He tests model robustness by matching mean values, signal variations, and natural oscillations with data sets from the <a href="http://www.ncar.ucar.edu">National Center for Atmospheric Research</a> (NCAR) and the <a href="http://www.ecmwf.int">European Centre for Medium-Range Weather Forecasts</a>. </p>

<p>&#8220;The largest uncertainty [of radiative forcing components] is aerosols,&#8221; Li said. While a main cause of planetary warming is carbon dioxide gas trapping long-wave radiation from Earth, aerosol particle effects are much more complex. Li added that &#8220;we should consider natural forcing too,&#8221; which includes varying solar input, volcanic emissions, and the Arctic oscillation.</p>

<p><strong>Aerosol size and composition</strong></p>

<p>Xiahong Liu, climate scientist from <a href="http://www.pnl.gov/">Pacific Northwest National Laboratory</a> in Richland, Washington, also spoke at the EGU meeting. He pointed out that China's sulfur emissions have increased nearly fivefold between 1950 and 2011. At the same time, surface energy flux over East Asia has decreased by 5 W/m<sup>2</sup> a decade. Sulfur emissions are converted to sulfate aerosols by oxidation in the atmosphere. </p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="figure_3.jpg" src="http://blogs.physicstoday.org/singularities/figure_3.jpg" width="400" height="324" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Liu takes the NCAR Community Atmosphere Model (CAM5) and applies it in a novel way to investigate the role of specific aerosol properties in the weakening of the EASM. Rather than looking at collective aerosol mass as has been done before, he examines how the size distribution and composition of different aerosols can bring about changes and be used to predict future effects. Sulfate and organic carbon (OC) generally have a cooling effect because they scatter incoming solar radiation back to space. Black carbon (BC)&mdash;also emitted by diesel combustion and biomass burning but with different chemical structure to organic carbon&mdash;traps radiation, which causes a warming effect.</p>

<p>In their particulate form, the combination of sulfate, OC, and BC can also modify cloud properties: A larger number of particles corresponds to a larger number of nuclei on which a fixed amount of water can condense in a lifted parcel of air. The increase in nuclei leads to a larger number of smaller cloud droplets and a more uniform cloud droplet size distribution than would occur without the extra particles. The resulting clouds produce less rain because rain drops form only when cloud droplets coalesce, which requires a broad particle size distribution.</p>

<p>Liu's experiments with CAM5 examine the effects of combinations of BC, OC, and sulfate emissions on atmospheric structure. Although the model is benchmarked against satellite measurements of aerosol absorption for 200 sites worldwide, including 10 in East Asia, there is still no satisfactory method of checking the composition of the absorbing aerosols. &#8220;We're trying to use Chinese data sets to get more information about composition, but sulfate emission is not reported to the government by very small factories,&#8221; added Liu. Actual aerosol effects may be stronger than those predicted by the model.</p>

<p><strong>Weaker monsoons</strong></p>

<p>Overall, the influence of aerosols on radiation and on clouds generates a net surface cooling over China of 1 to 2 kelvin. Aerosols also reduce the solar flux reaching the land. Since 1950, the total reduction in surface flux in China is thought to total 30 W/m<sup>2</sup>, with the biggest contribution occurring after 1980. Lower land temperatures flatten the land&ndash;sea temperature gradient, thus weakening the monsoon effect. </p>

<p>According to Li, because aerosols promote surface cooling, they cannot be responsible for the warming that causes the southerly precipitation shift. But according to Liu,  aerosols do indeed shift the precipitation pattern. &#8220;Precipitation is loss of water vapor, and the latent heat capacity of the ocean balances this,&#8221; he explained. The latent heat of the ocean has a greater effect than that of the land, which drives the ocean&ndash;land temperature gradient and also the monsoon.</p>

<p>Liu agreed with Li, however, that the average amount of precipitation over the entire monsoon region remains the same. When water vapor is trapped in the aerosol-laden atmosphere, the amount of rain that falls in light showers decreases, but short periods of  heavy preciptation intensify.</p>

<p>It might not be folks just in the southern part of East Asia that should be getting out their umbrellas, though. Long-range transport of pollution from East Asia to North America is a new cause for concern. As East Asia's economy continues to grow, so will its aerosol emissions. The effect of pollutant outflow as well as monsoon effects on agriculture might not be confined to East Asia alone.</p>

<p>Rachel Berkowitz</p>]]>
        
    </content>
</entry>

<entry>
    <title>IPF 2011: Superconductivity and wideband telecommunication</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/03/ipf-2011-superconductivity-and-broadband-telecommunication.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6843</id>

    <published>2011-03-24T14:56:14Z</published>
    <updated>2011-03-26T13:09:28Z</updated>

    <summary> In general, the cooling required to put even high-temperature superconductors into their zero-resistance state is expensive and inconvenient. To succeed, a commercial application of superconductivity should satisfy a requirement identified by one of the pioneers of superconductivity, Ivar Giaever:...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Business and industry" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Condensed matter" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Materials science" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="ipf2011.jpg" src="http://blogs.physicstoday.org/singularities/ipf2011.jpg" width="123" height="142" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span> In general, the cooling required to put even high-temperature superconductors into their zero-resistance state is expensive and inconvenient. To succeed, a commercial application of superconductivity should satisfy a requirement identified by one of the pioneers of superconductivity, Ivar Giaever: For whatever device performance you want to achieve, superconductivity has to be the only solution.</p>

<p>Giaever's requirement was invoked by Oleg Mukhanov in his talk at the 2011 <a href="http://www.aip.org/ipf">Industrial Physics Forum</a> in Dallas, Texas. Mukhanov works for <a href="http://www.hypres.com">Hypres</a>, a company founded in 1983 to develop and commercialize applications of superconductor electronics. Based in Elmsford, New York, Hypres markets several products. Among the most recent and most promising is a wideband telecommunications receiver.</p>

<p>The key to packing as much information as possible into a radio-frequency signal is to operate in a wide frequency band. With current semiconductor technology, this is very difficult at high radio frequencies, especially when it comes to extracting the signal. The receivers are expensive, complex, and inflexible, and they suffer a range of performance problems. </p>

<p>Those drawbacks arise, Mukhanov explained, because semiconductor circuitry can't keep up with gigahertz signals. To cope with a signal that is both high frequency and wideband, a conventional receiver first puts the signal through a series of analog band-splitting and down-conversion steps. The signal's digital content is then extracted and processed using semiconductor narrow-band analog-to-digital converters and processors. As a result, the signal's bandwidth has to be divided into several channels, each of which must be processed by a separate receiver chain. The division adds noise and distortions to the signal, reducing its overall quality.</p>

<p>A typical semiconductor-based wideband receiver has several channels, each of which has its own low-band filter, local oscillator, low-pass filter, and analog-to-digital converter. The parallel architecture is inherently inflexible and cannot be reconfigured through programming commands. Dividing the bandwidth into a different set of channels would require installing new chains of processing hardware.</p>

<p>Hypres's new, superconductor-based receiver is simpler, cheaper, and more flexible. At its heart is an integrated circuit that includes a niobium RSFQ (rapid single flux quantum) analog-to-digital converter and digital signal processor. At around a few picoseconds, the RSFQ circuit's characteristic response time is short enough to process multi-gigahertz signals.</p>

<p>What's more, the Hypres receiver needs only one low-cost analog wideband filter, not half a dozen or so higher-cost narrow-band ones; dispenses with local oscillators; and can handle a wideband signal without splitting it into channels. If the signal is reconfigured for different frequency band locations, the receiver can be preprogrammed. No new hardware is needed.</p>

<p>Interestingly, the Hypres RSFQ digital technology itself depends on another innovative technology: the compact 4-kelvin cryocoolers that cryocooler companies developed for various applications including NASA space missions.</p>

<p>Mukhanov told his audience that the US Navy recently placed an order for cryogenic-filter and low-noise-amplifier technology. Whatever qualms the navy has about using cryogenic technology are evidently allayed by the prospect of superior performance.</p>

<p>Charles Day</p>]]>
        
    </content>
</entry>

<entry>
    <title>IPF 2011: What to do with room-temperature superconductivity once we find it?</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/03/ipf-2011-what-to-do-with-room-temperature-superconductivity-once-we-find-it.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6835</id>

    <published>2011-03-22T19:44:27Z</published>
    <updated>2011-03-23T14:50:58Z</updated>

    <summary> While researchers are working to understand the origin of superconductivity, technicians are working just as furiously to find new ways this remarkable effect can be put to use. What are the possible applications for room-temperature superconductors? At this year&apos;s...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Business and industry" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Condensed matter" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Materials science" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="ipf2011.jpg" src="http://blogs.physicstoday.org/singularities/ipf2011.jpg" width="123" height="142" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span> While researchers are working to understand the origin of superconductivity, technicians are working just as furiously to find new ways this remarkable effect can be put to use. </p>

<p>What are the possible applications for room-temperature superconductors? At this year's <a href="http://www.aip.org/ipf">Industrial Physics Forum</a> in Dallas, Texas, <a href="http://www.msd.anl.gov/personnel/crabtree/">George Crabtree</a> from Argonne National Laboratory gave a brief overview of the possibilities.</p>

<p>Power generation and storage hold a tremendous amount of promise. Nearly every step from power generation to delivery can be dramatically improved with the infusion of superconductivity. </p>

<p>The prime example is in power delivery. The US power grid loses nearly 10% of the energy generated to resistance and inefficiencies in the system. Those losses drop dramatically when superconducting wires are used. Not only that, but superconducting wires are so efficient they transfer five times the amount of electricity as a copper wire of the same width.</p>

<p>The current grid's inefficiency is becoming a major issue in urban areas. As more people move to cities, energy demand naturally follows. But as the need for electricity increases, real estate for the wires becomes scarcer. The wires have to compete with ever-expanding plumbing needs and broadband lines. Smaller, more efficient wires could mitigate the real-estate crunch.</p>

<p>On a much larger scale, superconducting wires could help provide one of the biggest boosts to get renewable energy off the ground. The windiest parts of the US are in the Great Plains, while the sunniest parts of the country are in the Southwest. Most people live east of the Mississippi River and along the West Coast, many miles away from those promising energy sources. </p>

<p>"You got to move that power, if you want to use it, hundreds or even thousands of miles," Crabtree said. </p>

<p><strong>An interstate superhighway for electricity</strong></p>

<p>Superconducting wires would be ideal for moving power over long distances. Crabtree showed a plan for a network of superconducting cables running from the Plains and the Southwest to both coasts through "a sort of interstate superhighway for electricity."</p>

<p>Just as big a challenge as energy transfer is energy storage. Here, too, superconductivity holds much promise. Superconducting magnetic energy storage (SMES) is a new technology currently being developed in labs around the world. By feeding electricity into a superconducting coil, SMES stores the electricity with little loss.</p>

<p>SMES does have some drawbacks. The biggest one pertains to storage capacity. To store the amount of energy that a standard coal plant puts out in a given day, you would need an SMES the size of a football field. But on smaller scales, SMES starts making more sense. </p>

<p>Indeed, SMES can mitigate one of the biggest drawbacks to wind and solar power: intermittency. When the wind dies down, or a cloud passes, power output decreases. SMES systems can smooth out the release of power. Connecting an SMES to each wind turbine or bank of photovoltaic cells would be a big step toward overcoming the intermittency problem.</p>

<p>For some of these applications, the use of superconducting wire is so advantageous that some operators are willing to use cuprate materials, even though the wires require cooling and are brittle. Still, achieving room-temperature superconductivity  remains the major goal. "I don't think that there's anyone in the room saying you couldn't get a room-temperature superconductor," Crabtree said. </p>

<p>The first generation of superconducting wires consisted of <a href="http://en.wikipedia.org/wiki/BSCCO">BSCCO</a> (bismuth strontium calcium copper oxide) filaments suspended in a silver sheath. This hampered their practicality because of the inherent high costs of silver. Now, layered <a href="http://en.wikipedia.org/wiki/YBCO">YBCO</a> (yttrium barium copper oxide) ribbons are one of the most promising areas of development. The raw materials needed to manufacture them are far cheaper, but because of their intricate construction, cost still far outstrips that of traditional copper wires. On top of that, the energy needed to keep the wires sufficiently cool eclipses any power savings offered by superconducting wires. </p>

<p>Despite those disadvantages, tests started in 2008 by the Department of Energy and the Long Island Power Authority have shown that cuprate wires perform well. </p>

<p>The need for room-temperature superconductivity is plainly present, and as the old adage goes, "necessity is the mother of invention." And even if cheap and easy room-temperature superconductivity is just a pipe dream, the search for it has resulted in incalculable contributions to science. </p>

<p>"Superconductivity has in many ways led the field of condensed-matter physics for the last century," Crabtree said.</p>

<p>Mike Lucibella</p>]]>
        
    </content>
</entry>

<entry>
    <title>IPF 2011: Plugging into the grid</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/03/ipf-2011-plugging-into-the-grid.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6842</id>

    <published>2011-03-22T18:40:28Z</published>
    <updated>2011-03-24T17:57:50Z</updated>

    <summary> For now, room-temperature superconducting wires remain a pipe dream, but superconducting power cables based on cuprate materials are actually starting to work their way into power grids. Alexis Malozemoff from the company American Superconductor (AMSC) started off his talk...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Business and industry" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Condensed matter" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Materials science" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="ipf2011.jpg" src="http://blogs.physicstoday.org/singularities/ipf2011.jpg" width="123" height="142" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span> For now, room-temperature superconducting wires remain a pipe dream, but superconducting power cables based on cuprate materials are actually starting to work their way into power grids.</p>

<p>Alexis Malozemoff from the company American Superconductor (AMSC) started off his talk at the 2011 <a href="http://www.aip.org/ipf">Industrial Physics Forum</a> in Dallas, Texas, by describing his company&#8217;s development of superconducting wires&mdash;and its first major commercial order. LS Cable of South Korea bought about three million meters of AMSC&#8217;s wires to turn into more than ten kilometers of power cables. Some of the cables will be used to bring power directly into South Korea&#8217;s capital Seoul.</p>

<p>&#8220;This major commercial order we see as tremendously important,&#8221; Malozemoff said. &#8220;[This] order signals the transition from demonstration to commercialization.&#8221;</p>

<p>The wires that LS Cable bought are really more like ribbons, about four millimeters wide and about a fifth of a millimeter thick. Each one is made of about eight layers of different materials, but only the thin middle <a href="http://en.wikipedia.org/wiki/Ycbo">YBCO</a> (yttrium barium copper oxide) layer actually carries the current of more than 3 megamp/cm<sup>2</sup>.</p>

<p>To turn them into functioning power cables, the thin ribbons are wound helically in one direction around a copper core and then another layer is wound in the opposite direction to balance out the axial magnetic fields. The wound-up ribbons are then clad in layers of dielectric. When they&#8217;re operating, the ribbons are bathed in liquid nitrogen to keep them below their superconducting transition temperature.</p>

<p>&#8220;Superconductor cable is more expensive than a conventional cable per length,&#8221;  Malozemoff said. But, he added, a superconducting power network would save money when viewed as an overall system. Because traditional cables are so bulky, installing them in dense inner cities or even remote rural areas is more expensive than would be the case for low-profile superconducting cables.</p>

<p>&#8220;It's essential to look at these costs as a system,&#8221; Malozemoff said. &#8220;There&#8217;s literally no easier way to get power into a big city like New York City.&#8221;</p>

<p>Mike Lucibella</p>]]>
        
    </content>
</entry>

<entry>
    <title>IPF 2011: In search of a superconducting supertheory</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/03/ipf-2011-in-search-of-a-superconducting-super-theory.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6834</id>

    <published>2011-03-21T17:48:50Z</published>
    <updated>2011-03-23T14:46:11Z</updated>

    <summary> Physicists looking at the history of superconductors have been keeping an eye on what the future might bring. Seamus Davis of Brookhaven National Laboratory, speaking at this year&#8217;s Industrial Physics Forum in Dallas, Texas, reviewed the recent history of...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Condensed matter" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="ipf2011.jpg" src="http://blogs.physicstoday.org/singularities/ipf2011.jpg" width="123" height="142" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></span> Physicists looking at the history of superconductors have been keeping an eye on what the future might bring. <a href="http://people.ccmr.cornell.edu/~jcdavis">Seamus Davis</a> of Brookhaven National Laboratory, speaking at this year&#8217;s <a href="http://www.aip.org/industry/ipf/2011/presentations.html">Industrial Physics Forum</a> in Dallas, Texas, reviewed the recent history of high-temperature superconductivity development. He and his fellow researchers look for an all-encompassing theory that can explain superconductivity as a whole.</p>

<p>For years after the first superconductors were created, the highest temperature they were able to operate at&mdash;designated by <em>T</em><sub>c</sub>&mdash;hovered close to absolute zero and climbed at an excruciating rate of less than a degree a year new materials were discovered. Then in the late 1980s, with the discovery of copper oxide superconductors, <em>T</em><sub>c</sub> jumped suddenly, and the world hoped to see a revolution in technology as a result. Visions of levitating trains, superconducting server farms, lossless electricity transfer, and the like peppered the newspapers. Davis compared the anticipated technological revolution with the actual technological revolution that semiconductors brought about.</p>

<p>Alas it was not to be. After that initial cuprate jump, progress in raising <em>T</em><sub>c</sub> leveled off at about 135&#160;K&mdash;high enough for laboratory and industrial endeavors, but too cold for consumer products. The discovery of pnictide superconductors in the late 2000s seemed to hold a lot of promise because their superconductivity resembles that  of the cuprates but is different enough to suggest an alternative route to higher <em>T</em><sub>c</sub>. Despite an explosion in research, the highest pnictide <em>T</em><sub>c</sub> remains around 50 K.  </p>

<p>What happened? Although the ideas for applications of superconductors were there, the materials themselves were not. Researchers in the field are still trying to devise a comprehensive theory of high-temperature superconductivity that could point the way to truly high-<em>T</em><sub>c</sub> materials. The one clear thing is that the answer, whatever it may be, is mighty complicated.</p>

<p>In his talk, Davis laid out several leading theories that physicists are currently investigating: strong correlations, antiferromagnetic spin fluctuations, local pairing, and quantum critical points. All the theories so far are incomplete. They explain aspects of why certain materials superconduct at higher temperatures, but none of them offers an all-encompassing explanation. </p>

<p>At the end of his talk, Davis called on the students in the audience to rise to the challenge before them. Because of their potential impact on the world, the discovery of materials that superconduct at room-temperature is one of the most tantalizing goals in all of physics.</p>

<p>&#8220;The challenge that I pose to you, is to just look at the facts and come up with an answer,&#8221; Davis said. </p>

<p>Davis showed a timeline of major milestones for superconductivity, from its original discovery in 1911 by Heike Kamerlingh Onnes, 1933 when Walter Meissner and Robert Ochsenfeld discovered their eponymous effect, on through to 1986 when high-temperature cuprates were discovered. On average, each major theoretical advance happened 26 years apart. According to Davis's plot, 2012 is the year for the next big discovery. </p>

<p>Of course science doesn&#8217;t obey timetables and schedules. Who knows, maybe the pnictide superconductors discovered in the late 2000s will supply the next data point in Davis's plot, or maybe the long-sought-after comprehensive theory is just around the corner. Nevertheless, Davis remains optimistic about the future. </p>

<p>&#8220;It&#8217;s a complicated problem no doubt,&#8221; Davis said. &#8220;I certainly believe we can understand what&#8217;s going on here, and we will achieve room-temperature superconductivity.&#8221;</p>

<p>Mike Lucibella<br />
</p>]]>
        
    </content>
</entry>

<entry>
    <title>Two physicists share their &quot;ideas worth spreading&quot; at the 2011 TED conference</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/03/two-physicists-share-their-ideas-worth-spreading-at-the-2011-ted-conference.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6811</id>

    <published>2011-03-15T17:10:56Z</published>
    <updated>2011-03-21T18:51:04Z</updated>

    <summary>By Jermey N. A. Matthews Where would you expect to find physicists sharing the stage with Pulitzer Prize winners, renowned artists and musicians, former heads of state, and social activists? Lately, that place has been at the annual, invitation-only TED...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Astronomy and cosmology" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Atomic physics" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Careers and employment" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Education" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p>By Jermey N. A. Matthews</p>

<p>Where would you expect to find physicists sharing the stage with Pulitzer Prize winners, renowned artists and musicians, former heads of state, and social activists? Lately, that place has been at the annual, invitation-only <a href="http://conferences.ted.com/TED2011/">TED conference</a>, originally founded as an idea incubator for luminaries in technology, entertainment, and design. The 2011 conference, titled &#8220;The Rediscovery of Wonder,&#8221; was held 28 February to 4 March in Long Beach, California, and featured such speakers as Microsoft chairman and philanthropist Bill Gates, singer Bobby McFerrin, and film critic Roger Ebert.</p>

<p>But just being famous won&#8217;t get you invited to a TED conference. Organizers look for people they consider to be &#8220;the world's smartest thinkers, greatest visionaries, and most-inspiring teachers.&#8221; One such invitee, cosmologist Neil Turok, lectured the TED audience in 2008 on his cyclic model of the universe and collected the $100&thinsp;000 TED Prize for his African Institute for Mathematical Sciences&#8217; &#8220;<a href="http://www.nexteinstein.org">Next Einstein in Africa</a>&#8221; educational initiative (see the news story about AIMS in <em>Physics Today</em>, May 2008, <a href="http://dx.doi.org/10.1063/1.2930726">page 25</a>).</p>

<p>Neither of the two physicists invited to speak earlier this month were winners of the 2011 TED Prize (that honor went to an anonymous street artist called JR, whose goal is to &#8220;turn the world inside out&#8221; by galvanizing volunteers to photograph and hang portraits of people in their community). But both physicists conduct research that met the conference&#8217;s &#8220;ideas worth spreading&#8221; criteria, and, like Turok, both pursue interests outside of their primary vocation.</p>

<p>Barnard College theoretical physicist <a href="http://www.jannalevin.com">Janna Levin</a>, who kicked off the five-day conference, has conducted several public lectures&mdash;including on Comedy Central&#8217;s <em>The Colbert Report</em>&mdash;on the early universe, gravitational waves, and black holes. &#8220;TED brings together people who are thinking about the big picture,&#8221; she says. &#8220;People who are definitely engaged in the world at large and are also experts in their specialty but have an ability to reach out and make broader connections.&#8221; Levin has also served as a scientist-in-residence at Oxford University&#8217;s Ruskin School of Drawing and Fine Art and wrote two books, <em>How the Universe Got Its Spots: Diary of a Finite Time in a Finite Space</em> (Anchor Books, 2003) and <em>A Madman Dreams of Turing Machines</em> (Knopf Publishers, 2006).</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Levin_OConnell.jpg" src="http://blogs.physicstoday.org/singularities/images/Levin_OConnell.jpg" width="267" height="185" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Aaron O&#8217;Connell was invited to the 2011 TED conference to discuss how he built &#8220;the world&#8217;s first quantum machine&#8221; in the lab of University of California, Santa Barbara physics professor <a href="http://www.physics.ucsb.edu/~clelandgroup">Andrew Cleland</a>&mdash;a feat that was recognized as the 2010 &#8220;Breakthrough of the Year&#8221; by <em>Science</em> magazine. As he is described in the TED conference brochure, O&#8217;Connell grew up &#8220;reading philosophy, playing guitar, and generally not thinking about science&#8221; before being propelled to graduate school by &#8220;a series of positive research experiences as an undergraduate&#8221; at Eckerd College in Florida. &#8220;Actually it started in elementary school,&#8221; says O&#8217;Connell, who completed his physics PhD degree last year. &#8220;My sixth grade teacher had a bunch of batteries, wires, motors, metals, beakers, and other stuff in the back of the room. His rule was that you had to either be doing the classwork or be in the back playing in an undirected way. It was a no-brainer for me. I spent at least half the day in the back of the room.&#8221;</p>

<p><em>Physics Today</em>&#8217;s Jermey Matthews recently talked with both Levin and O&#8217;Connell about their experience at the 2011 TED conference.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What did your talk at TED focus on?</p>

<p><span style="color:#006699"><strong>LEVIN:</strong></span> I talked about how black holes can play drums on spacetime, how they can ring out a song in the form of gravitational waves, and how we&#8217;re aspiring to pick up the pale echo of the coalescence of black holes as well as the Big Bang. There is a substantial community of independent researchers who model black holes ringing spacetime. I talked about that community effort and played some songs from my research where we simulate what the <a href="http://www.jannalevin.com/science.html">black holes would sound like</a> if we could pick up the wobbling of space, which we hope to do in the next few years with LIGO [the Caltech&ndash;MIT operated Laser Interferometer Gravitational-Wave Observatory] and, if we&#8217;re lucky, with LISA [NASA&#8217;s Laser Interferometer Space Antenna].</p>

<p>I also talked about how we can observe the universe in a totally new way&#8212;what it was like before Galileo and then what it was like after the <em>Hubble Space Telescope</em>, and what huge cultural shifts were created. If [LIGO or LISA] can pick up a soundtrack of the universe that we&#8217;ve never heard before, a whole new perspective on the universe would open up.</p>

<p><span style="color:#006699"><strong>O&#8217;CONNELL:</strong></span> I gave a talk on the work I did [designing] the first human-made visible object whose motion follows the laws of quantum mechanics. It is the first macroscopic mechanical resonator to reach the quantum ground state. We were then able to excite the resonator to a single phonon state by transferring a single quantum excitation from a superconducting qubit to the mechanical resonator. During this process we also created entangled qubit-resonator states. However, my talk was mostly about creating a superposed phonon state: the equivalent of the mechanical resonator vibrating a little, the quantum ground state, and a lot, the first phonon state&mdash;at the same time. If we think about the atoms, then for the majority of the time, every atom is in two different places at the same time, which in turn corresponds to the entire mechanical resonator being in two different places. For the talk, I mostly stressed this mind-bending view of our conception of space and identity&mdash;that one thing can be in more than one place at a time.</p>

<p>While we have known that it is possible to observe quantum effects on a human-like scale, that is, in objects we can see, most of the experiments up to this point were quantum coherent in the form of a condensate. Direct observation of movement in space of a macroscopic object calls out to the intuition in a way that is fundamentally different from the collective states of superfluids or superconductors. I tried to use this relation to the location of everyday objects to bring out the notion that matter may arise from the interplay of inherently quantum objects. Colloquially, it is not just that quantum mechanics says that everything is interconnected. It is more than that, because it is those connections that literally define the form of everything around us.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How would you compare and contrast TED to a traditional physics conference?</p>

<p><span style="color:#006699"><strong>LEVIN:</strong></span> There are no parallel sessions. It is expected that every session is of interest to everybody. And the sessions are very varied. It&#8217;s curated with a bigger organic picture in mind. There is an expectation that TED is fertile ground for people to start talking and for extremely unusual things to happen that would not happen in any other context. For example, I met artists that I might write essays for.</p>

<p><span style="color:#006699"><strong>O&#8217;CONNELL:</strong></span> TED is about as far from a physics conference as possible. The idea behind TED is to embrace humanity. The nonpresenting participants are just as important, if not more important, than the speakers in shaping the experience of the conference. The running theme is developing new connections and shaping the world together. I would say the most frequent and important question asked at the conference is, "How does your work help people and how does it make the world a better place?" While these notions are the underpinnings of the physics community as well, they are never expressed or thought about that explicitly.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What was the most interesting talk you heard?</p>

<p><span style="color:#006699"><strong>LEVIN:</strong></span> I was really impressed with <a href="http://www.antonyandthejohnsons.com/">Antony and the Johnsons</a>; they&#8217;re incredible musicians. I didn&#8217;t get to meet [artist] <a href="http://www.sheahembrey.com">Shea Hembrey</a>, but I thought his talk on his work [creating art inspired by birds] was fantastic.</p>

<p><span style="color:#006699"><strong>O&#8217;CONNELL:</strong></span> While I found some other talks more moving, I found the talk by <a href="http://www.motorestaurant.com">Homaro Cantu and Ben Roche</a> the most interesting. They own a restaurant where they create food that looks or tastes like other food. I would highly recommend watching the video once it is posted on the TED website because I am not going to do their work justice, but they are primarily interested in the experiential relationship people have with their food and what prejudices they carry toward their food's appearance. I found the way they approach food intriguing because I believe that we should all continuously question our conceptual model of the world.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Who were some of the people that sought you out?</p>

<p><span style="color:#006699"><strong>LEVIN:</strong></span> I was kind of mobbed since my talk launched the conference. People are curious and are interested in and sympathetic to science. It&#8217;s important that scientists connect with nonscientists. It should not only be about whether someone can help push me over a technical obstacle I&#8217;ve encountered. I figure some of these people [at TED] might vote differently or feel differently when they hear that the government wants to cut funding for fundamental research. You get the feeling that people appreciate why science research is important. They&#8217;re caught up in the enthusiasm of it.</p>

<p><span style="color:#006699"><strong>O&#8217;CONNELL:</strong></span> Let's just say that it turns out that a wide range of people are interested in physics, from actors to technologists to CEOs, as long as you take the time to present your ideas in a clear and approachable way.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How did your interest in music and the arts come about?</p>

<p><span style="color:#006699"><strong>LEVIN:</strong></span> I think it&#8217;s harder to understand why people get less involved in things like art as they grow up. I just haven&#8217;t excised my interest in the arts. It doesn&#8217;t help my science to be blinded to other interesting things in the world.</p>

<p>At Ruskin, I got a start on writing my novel [<em>A Madman Dreams of Turing Machines</em>], and I worked a lot with the students in the master&#8217;s program there, critiquing their work, and discussed how their work fit into a larger context. It was a very creative free-for-all.</p>

<p><span style="color:#006699"><strong>O&#8217;CONNELL:</strong></span> I was never interested in music or art until I was exposed to experimental music and conceptual art. That sucked me in. I became engrossed in anharmonicity and Dada [a cultural &#8220;anti-art&#8221; movement that began in the early 20th century]. Then I got it: What I now consider to be the best music and art isn't meant to be subversive and simply to bring to the forefront another opinion, but rather allows the humanity conveyed by that view to be shared among people. Art challenges the world by connecting humanity.</p>

<p>Nonetheless, it is really difficult to stay connected to the arts as a physicist, at least for serious physicists who devote themselves to their work. The physics community at large rewards focus over breadth.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What&#8217;s next for you?</p>

<p><span style="color:#006699"><strong>LEVIN:</strong></span> I&#8217;m noodling around with some ideas for my next book, which is in a very early phase. Whatever it turns out to be, it will involve science. It&#8217;s the way I see the world. There&#8217;s a powerful aesthetic to science. I&#8217;m not bored of it yet.</p>

<p><span style="color:#006699"><strong>O&#8217;CONNELL:</strong></span> I have found that the truly rewarding experiences in my life have had a common motif: unstructured exploration of novel ideas. Thus, rather than take the traditional academic route, I plan to start science-and-technology-based companies that have the potential for large social impact.</p>]]>
        
    </content>
</entry>

<entry>
    <title>Bored engineer becomes passionate high-school teacher: Q&amp;A with Amir Abo-Shaeer</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/03/bored-engineer-becomes-passionate-high-school-teacher-qa-with-amir-abo-sheer.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6753</id>

    <published>2011-03-01T20:34:30Z</published>
    <updated>2011-03-09T18:46:03Z</updated>

    <summary><![CDATA["There is no Liz Brooks," came a man's voice over the phone. Amir Abo-Shaeer had agreed to speak to a graduate student&mdash;Brooks&mdash;for a story she was writing for her campus newspaper. So he was confused when, at the appointed time&mdash;7am...]]></summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Education" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p>"There is no Liz Brooks," came a man's voice over the phone. Amir Abo-Shaeer had agreed to speak to a graduate student&mdash;Brooks&mdash;for a story she was writing for her campus newspaper. So he was confused when, at the appointed time&mdash;7am one morning last fall&mdash;he got a different call. But after a while, the not yet fully awake Abo-Shaeer understood that the supposed newspaper interview was part of an elaborate pretext to coordinate informing him and the other 2010  MacArthur Foundation fellows that they had won so-called "genius awards."</p>

<p>Abo-Shaeer grew up in Santa Barbara, California. After earning a bachelor's degree in physics and a master's in mechanical engineering&mdash;both from the University of California, Santa Barbara (UCSB)&mdash;he spent a few years working in industry. He then switched to teaching high-school physics, ending up at the public school he himself had graduated from, <a href="http://www.sbsdk12.org/schools/secondary/dospueblos.shtml">Dos Pueblos High School</a>.</p>

<p>Since starting at Dos Pueblos in 2001, Abo-Shaeer has been garnering increasing acclaim for the engineering academy he founded within the school. He is planning a program for teachers to come spend a sabbatical year at the Dos Pueblos Engineering Academy so "they can learn how to do it and then go home and replicate it on a small scale, without wandering in the dark like I did."</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="abo-shaeer.jpg" src="http://blogs.physicstoday.org/singularities/abo-shaeer.jpg" width="300" height="259" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Crown Publishers is set to release Neal Bascomb's <em>The New Cool: A Visionary Teacher, His</em> FIRST <em>Robotics Team, and the Ultimate Battle of Smarts </em>in March. The book follows Abo-Shaeer and academy seniors as they participate in the <a href="http://www.usfirst.org/roboticsprograms/frc/default.aspx?=966"><em>FIRST</em> Robotics Competition</a>. Academy slots are in high demand, the teaching approach is innovative, and graduates are getting into good colleges. Perhaps most attention-getting is that, in a field that struggles for gender parity, fully half of the students at Dos Pueblos Engineering Academy are girls. </p>

<p>Academy seniors will compete in March and April in the 20th anniversary of the <em>FIRST</em> Robotics Competition. The challenge this year is to build a robot that hangs inflated shapes at different heights in a game akin to giant tic-tac-toe. Winning the robotics competition in their third year of competing "solidified everything," Abo-Shaeer says, and helped raise money for the academy's expansion.</p>

<p>Last summer the academy broke ground on a new $6 million building. With more space, better machine shops, and fancier computer centers will come more students, new teachers, and a project-based curriculum that interweaves physics, engineering, and art.</p>

<p><em>Physics Today</em>'s Toni Feder caught up with Abo-Shaeer by phone.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Why did you switch from a career in engineering to teaching high school? </p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> I worked in aerospace and in telecommunications for about four years. In aerospace, I basically did research and development on different kinds of solar panel arrays. In telecommunications, it was just really boring stuff&mdash;that is what made me leave engineering. It was great that I had that job, because I really don't think I was cut out to be an engineer. I like inventing and home-project engineering, but sitting in a cubicle and doing engineering proper didn't suit me. </p>

<p>I had a very positive mentor in high school, my band teacher. I felt that high school was the best match in terms of the skill set I had and the student population I wanted to work with.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How did you make the switch?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> I just quit. I applied to UCSB's teacher-education program to get a credential. I wanted to stay in Santa Barbara, and all three high schools were hiring in science. I chose Dos Pueblos not because it was my alma mater but because they had received a grant to pilot an engineering program. That is what I have developed. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Tell me about the academy you founded.</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> Starting from the beginning, I had this chunk of money that was to develop curricula and a plan. I spent the first year investigating&mdash;I went to schools, looked at what other people were doing. Then I started to try to create curriculum. I found out what the process was in the state of California, and it's not easy. The UC system insists on approving courses that it will count as college preparatory. That put a very substantial bureaucracy between me and what I knew was good curriculum. It's not that the UC system was trying to stifle things, but in standardizing the process, innovation was not honored. </p>

<p>I decided to accept that there were constraints, and to stop contemplating flying to Sacramento to yell at someone.</p>

<p>The academy is a school within a school. In their first year, students take only engineering physics in the academy. I taught physics, but would infuse projects into it, and make it engineering physics. It bothered me that the UC system would not give the kids credit for engineering physics. In their second year, they do a project-based learning class. The third year is AP [advanced placement] physics. I needed to create a senior class, and I wanted something competitive and exciting. I also knew that the senior year had more flexibility, because at that point the students had already created their transcripts that would get them into college. I could create a nonapproved course. I made the title robotics, so if it was on their transcript, MIT wouldn't care whether it was UC-approved or not. </p>

<p>The senior course was to design and build a robot, which would be entered in the <em>FIRST</em> Robotics Competition, a national competition. We run the course like a business. The seniors manage all aspects with me&mdash;web design, grant writing, graphic arts. I teach students to take a conceptual idea to completion. That is what they need to be successful in the world. High school doesn't teach that. College doesn't either.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="shaeer_students.jpg" src="http://blogs.physicstoday.org/singularities/shaeer_students.jpg" width="347" height="278" class="mt-image-center" style="" /></span></p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How does the robotics competition work?<br />
 <br />
<span style="color:#006699"><strong>ABO-SHAEER:</strong></span> You create a robot for a game. The robots are 150 pounds, they are real machines, they are on wheels. They do sports. We get a rule book, pour through it, and approach it from two perspectives. The robot design perspective is, what can the robot do to meet the challenge? And the game theory perspective is, how is this game going to be played? The way the design process works is the students break up into four electrical/electromechanical subgroups, an electrical group, and a programming subgroup. </p>

<p>The third year, we won. That year, the game was like NASCAR, only you had to pick up a ball that was 40 inches in diameter, bring it with you, and throw it over an 8-foot fence every time it went around the track. We had a forklift that would expand from a 4-foot to 15-foot robot in two seconds.</p>

<p>When we first got there, I realized that what I was doing was completely not what anyone else was doing that was competing in this competition. It was mainly clubs. Some teachers got stipends, and the kids were not getting course credit. People thought that I was insane, because the club teams had kids that were freshmen, sophomores, juniors, and seniors, so when the seniors graduated, they didn't lose all their intellectual capital. But for my team, recruiting is not an issue, because this year's juniors will be next year's team.</p>

<p>After our team participated a few times, the organization behind the competition came to my classroom. They said, "We don't understand how you have a team that starts out with brand new kids each year, and are able to compete at the level of teams that have existed for 15 years. They have long-term mentors, and everyone knows what they are doing."</p>

<p>At that point, I had three competitions under my belt. The fact that my students were all seniors was beneficial because they were mature, they had already applied for college, they knew they would only get to do this once, and they were able to throw all their effort into the robots. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Where did things go from here?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> It was the robotics competition and watching my students that made me realize how backward what I was doing was because of the constraints put upon us. It was extremely frustrating. I applied for a $3 million grant from the state of California available for upgrading or building facilities related to any of a dozen or so sectors identified [by the state] as being engines behind the economy&mdash;agriculture, technology, tourism, etc. One of them is engineering. With some parents from the academy, I formed a foundation to raise matching funds. We got the grant.</p>

<p>The academy is going to grow from 128 kids&mdash;32 in each grade level&mdash;to 400. Kids apply in 8th grade, and we always have three times the number of qualified applicants as we have spaces. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> The academy is known for having an equal number of girls and boys. How do you achieve that?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> When I taught physics classes, they were basically half girls. Put in the word engineering, and bam! it was down to two. So, I brought girls from the program to the junior high schools during our recruitment presentation. I made it overtly obvious that girls were involved. When I looked at the questionnaires we had given out, I saw that way more girls had said they were interested than had followed up with applications. So I called the families of those girls&#8212;and most of the people said they had no idea their daughter would be interested. The number of girls in our applicant pool went up. Now it's strong and we don't have to do anything anymore. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What about minorities?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> We have an applicant pool that is only as diverse as the people that are qualified to be in the program based on what the education system has done. Our diversity in terms of minorities is increasing, but it's not a success story yet. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What are your plans for the expanded academy?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> My new curriculum was approved by the UC system [in November]. We are doing a serially integrated curriculum&mdash;this is new, I think I made it up. A kid takes one course their freshman year, and gets fractional credit in physics, fractional credit in engineering, and fractional credit in art. So over the course of three years, they get one year of each. </p>

<p>What is great about this is that now there is no race to get through specific content. Instead, you figure out what physics skills, what art skills, and what engineering tools you need for a specific project. The idea is built around the premise that the students are learning whatever they are learning at any given time to make a given project successful.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What are examples of projects?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> One teaches the mundane concept of vectors. Students will have to use a milling machine to make an artistic project that has curved features. The only way you can get curved features is if you understand the relationship between Cartesian and polar coordinates, which is going to require you to understand vectors. </p>

<p>Another example: I need to teach kids about equilibrium and force balance, so I have them make a mobile. First they will learn the equation for equilibrium and balance and torque. Then they design artistic elements, then they weigh the elements. If it does not balance, they can go back to their equations and see why not.</p>

<p>The projects are all two weeks, done in pairs or alone. I have made up about 30 of these projects so far. I worked with an art teacher. Our goal was, we would not compromise physics, we would not compromise art, and we would not compromise engineering. If any of those were compromised, or if it seemed fake, we wouldn't do it.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Why art?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> My hope is that by infusing art into it, and saying, look, we are going to be creating art projects and relating it to science, I think a whole new set of people are going to be attracted into this program.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Are you preparing people to be scientists? Engineers?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> No. I want people to have a positive experience with their science and understand how stuff can all relate together. I do not have a mission to get people to go into science and engineering, but because of the positive experience they have, they do.</p>

<p>I tell people that the type of thinking we require in the program is the type of thinking required in the world to be successful. It's problem solving. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> When you switched to teaching, did you have ambitions of the scope you are achieving?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> No. I was just excited about helping students. I was looking to teaching as something where I could give back, do something fun, and have a lifestyle that was supportive of my creativity. Eventually, all of my creativity ended up being directed toward the program.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Did your pay plummet when you left industry to teach? </p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> I did have to take a pay cut, but it hasn't been all that bad because I am director of this program. The difference is that engineers are salaried, and I get paid hourly. I work as many hours as an engineer, not less like a teacher typically does. In the end I am not worse off, and I am having a ton more fun. </p>

<p>What I try to tell students is that you have to follow what you want to do, and it will work out. In my case, not just in terms of happiness, but financially, things are working out. And now this award. I feel it's because I am doing what I am passionate about.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Speaking of your MacArthur genius award, first, congratulations. What are you planning to do with it?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> I don't know. I am not going to pay off my house. I am not going to go on a crazy spending spree, but I am also not going to buy pencils and erasers. For me as a public high-school teacher, it has given me the liberty to feel like I can do whatever I want. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What are your thoughts about how to attract more people to become teachers?</p>

<p><span style="color:#006699"><strong>ABO-SHAEER:</strong></span> Most people think the problem is that teachers are not paid well, but it's more than that. When you become a teacher, you start out at the bottom level, no matter how much experience you have in something else. </p>

<p>People who think midcareer about switching to teaching can stomach not getting paid as much, but they cannot stomach having their experience disregarded. This is a huge problem. </p>

<p>The most common question students ask is, When will I use this? That's not being communicated to them because the people teaching have only learned whatever it is as part of the path to getting their degree. They have never actually used what they are teaching. The system is fundamentally flawed in that it is not encouraging people to come into it. If you look at it, it's an unhealthy closed system.<br />
</p>]]>
        
    </content>
</entry>

<entry>
    <title>Visiting North Korea: Q&amp;A with Siegfried Hecker</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/02/visiting-north-korea-a-qa-with-siegfried-hecker.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6719</id>

    <published>2011-02-23T16:30:56Z</published>
    <updated>2011-02-23T18:46:34Z</updated>

    <summary><![CDATA[Metallurgist Siegfried S. Hecker is probably the leading US expert on the chemical and physical capabilities of plutonium. He is a former director of Los Alamos National Laboratory (1986&ndash;97) and now codirector of Stanford University's Center for International Security and...]]></summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Arms control and military physics" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Energy policy and R&amp;D" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Facilities and laboratories" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Nuclear and particle physics" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p>Metallurgist Siegfried S. Hecker is probably the leading US expert on the chemical and physical capabilities of plutonium. He is a former director of Los Alamos National Laboratory (1986&ndash;97) and now codirector of Stanford University's <a href="http://cisac.stanford.edu/">Center for International Security and Cooperation</a>. Hecker's expertise has been widely sought both within and outside the US government. </p>

<p>Last October, Hecker was privately invited by the North Korean government to view a new uranium enrichment plant. Shortly after his trip, <em>Physics Today</em>'s Paul Guinnessy asked Hecker about his findings, which he published in a recent <a href=" http://cisac.stanford.edu/publications/north_koreas_yongbyon_nuclear_complex_a_report_by_siegfried_s_hecker">report</a>.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Hecker.jpg" src="http://blogs.physicstoday.org/singularities/Hecker.jpg" width="250" height="320" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> Why were you invited to visit these facilities?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> It was the groundwork we have laid over the last seven years that allowed us to come back this time. So the real story is why was I there the first time, which was back in January 2004. </p>

<p>My colleague, John Lewis from Stanford University, had been having an ongoing track II dialog with the North Koreans since 1986. And in 2003 the situation was indeed very grim, in that North Korea had had some altercations with the US in 2002, and had walked away from the nuclear nonproliferation treaty (NPT) and said they were reprocessing plutonium. They told John that they were going to take him to the <a href="http://en.wikipedia.org/wiki/Yongbyon_Nuclear_Scientific_Research_Center">Yongbyon nuclear facility</a>. </p>

<p>John called me up&#151;I was still at Los Alamos&#151;and said, "Look, I would like to have a nuclear guy along," so I went along.</p>

<p>On this trip they actually ended up showing me their plutonium&#151;not only showing me, but actually allowing me to hold it in a glass jar, in order for me to try to determine whether it truly was plutonium or not. So this trip goes all the way back to the 2004 trip and what I did at that time. I came back out and reported the situation accurately and honestly as to what I saw, and what my assessment was, and so I've been back to North Korea each year since then. So, in essence, we have a standing invitation to go back each time we visit. </p>

<p>In 2010 I actually asked on several occasions to go, and I was told, "We aren't ready yet." Then, in late August, they actually said it might be a good time for me to come in late October, early November. </p>

<p>I told them that since North Korea had now declared [in 2009] that they were going to build a light water reactor and do their own uranium enrichment, I'd like to see those facilities, and they showed them to me. </p>

<p>So that's a very long answer. But in the end, they trusted us to tell the story honestly and then they are willing to take their chance with whatever assessment we make. And that's the way it's worked out for each of the several visits we've made. I've been to Yongbyon, the nuclear complex, on four of these visits.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What exactly is a track II dialog?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> It means nongovernment, nonofficial, so in other words, you get people who are from universities, nongovernment organizations (NGOs), who manage to keep a dialog going during difficult times, when governments are not able to talk to each other, for whatever reason.</p>

<p>In the North Korea case, the US has no diplomatic relations with them, so unless special arrangements are made, like the <a href="http://en.wikipedia.org/wiki/Agreed_Framework">1994 agreement</a>, or the <a href="http://en.wikipedia.org/wiki/Six-party_talks">six-party talks</a> that began in 2003, there are no easy mechanisms for the two governments to talk to each other officially. So track II is an unofficial way of keeping the contact, being able to exchange messages and information. In my case, it adds a scientific component to the track II dialog.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How long does each visit last? Do you just go for a week to one or two locations?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> So each visit that I have done has lasted exactly the same amount of time because of the limited flights into North Korea. We fly via Beijing on Tuesday morning, and leave Saturday morning. All of my seven visits have been the same way, on the state airline Air Koryo. </p>

<p>We schedule an agenda where we do much more than just the nuclear issues. For the nuclear visit, the Yongbyon complex is 90 km to the north of Pyongyang (the capital) and so that complex we visited on Friday this time. </p>

<p>We drive up early in the morning and drive back late in the afternoon. So the only day we actually saw the facilities that I reported on was Friday, 12 November. The other days we went to various universities&#151;Kim Il Sung University, for example, where we saw a very impressive e-library with lots of computers, flat-screen monitors, students studying; a foreign-language high school; and a foreign-studies university. We talked to a newspaper bureau and to various other organizations in North Korea to get a better sense of the whole spectrum of issues and not just the North Korean nuclear issue.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> This ties neatly into my next question. How much interaction with the science community do you have on your trips to North Korea?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> We've had substantial interactions with the schools and universities, with the ministry of education, also to some extent, with the economy ministry, and particularly with one of the universities associated with economics. </p>

<p>This time we went to this incredibly modern apple farm; in the past we have been to various co-ops outside the city of Sariwon. We've had some interactions with the North Korean Academy of Sciences, with the North Korean agricultural sciences, and my colleagues&mdash;John Lewis and Stanford epidemiologist Sharon Perry&mdash;have actually been extremely successful in working a joint project on tuberculosis with the North Koreans. </p>

<p>Perry has worked with some NGOs to build a TB reference lab in one of the TB hospitals in North Korea. So these track II dialogs have been very expansive, but my central focus has always been the scientific aspects of dialog, in particular the nuclear issue.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How do these dialogs continue when you're not in North Korea? Is it via letters or e-mail? What type of links can you have with the North Korean science community outside of physically being there?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> So there's only one communications funnel into North Korea: The UN [United Nations] mission in New York, which handles all of the communications with Pyongyang. So, for example, if we request a visit, the trip and its schedule is done through the UN mission. Once we get onto North Korean soil, then we have the ministry of foreign affairs that takes care of us. At which point we then rework the agenda of the trip. There is no direct dialog between North Korea and us without first going through this UN mission in New York.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> The main news out of your last trip was this enrichment facility. What's the attraction for North Korea in developing and building such a facility?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> I'm just writing a couple more pieces that go into more detail on the why and how. My previous assessment of the enrichment program (<a href="http://cisac.stanford.edu/publications/lessons_learned_from_the_north_korean_crises/">published</a> in <em>Daedalus</em>, January 2010) is that I believed that they have had such a program for a long time, several decades, but I thought that its current status was still at an R&D level. </p>

<p>That's why I was so surprised when I saw these high bay areas with 2000 centrifuges&#151;so I was wrong. But the assessment that they have had enrichment for several decades is correct. </p>

<p>My reasoning is that because they did not have their own light water reactors [which would require enriched uranium]&#151;and the reactors that they have, which are gas-graphite moderated reactors, require only natural uranium fuel&#151;you don't need enrichment, which is one of the reasons why they chose to use that [gas-graphite] technology. </p>

<p>So if they have been doing enrichment for several decades, it was primarily to give them the second door, the alternative path to the bomb. </p>

<p>Now this facility they actually showed me, I believe that this facility most likely will be dedicated to doing low-enriched uranium for this light water reactor, which they are now building. </p>

<p>They have had an interest in light water reactors since 1985. But they believed that they were not able to build a modern LWR by themselves, so they first tried to get one from the Soviets in 1985. Then they tried to get two of them from the Americans through the 1994 agreed framework, and then in this so-called September 19, 2005, agreement with the six-party talks, they again said they would like to have an LWR.</p>

<p>So what they actually told us, and what you can read in the opening statement in my <a href="http://cisac.stanford.edu/publications/north_koreas_yongbyon_nuclear_complex_a_report_by_siegfried_s_hecker">report</a>, is, "Look, we tried with you, we couldn't get anywhere, and so now we have to do it ourselves."</p>

<p>Again, the long answer is, if they are going to build their own LWR, they need to have their own enrichment. So now they have an excuse for saying that "we have to have enrichment." But their prior interest, in my opinion, must have been motivated mostly for this second path to the bomb. </p>

<p>Even if this building at Yongbyon is dedicated to low-enriched uranium, of course one at least has to keep open the possibility that they have another facility like this which could be dedicated to highly enriched uranium. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> One of the things that surprised me was the choice of location for this facility: It seemed like a pretty open spot to build a facility of this type. Do you have any idea why that particular spot was picked to build it?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> That's quite a puzzle, and that's actually what makes me think that they are going to do low-enriched uranium. </p>

<p>It's my assessment that they have to have had this type of facility operating somewhere else before they moved it this year, because you just don't get 2000 centrifuges&#151;you don't build them overnight, you don't get them operating overnight&#151;so they had them operating someplace else. So if all they are going to do is make highly enriched uranium, why not just keep them there? Wherever they had them? </p>

<p>Instead, they moved them out into the open and chose to show them to me, although I did ask to see them. So they specifically wanted to make this statement: "Look, don't underestimate us. We know how to do uranium enrichment, and here, come and take a look at it. You can see that we did it." So again, that's a good cover for it. They need it for an LWR. </p>

<p>None of us really fully understand how they think and how they lay it out, but to me, it all seems very carefully planned and laid out on their part, including this issue of showing it to me. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> So what's your impression of the quality of the facility? I've read in your reports that you thought the control room looked highly advanced. The materials you need to build a facility like this are fairly specialized. Were they developed in-house in North Korea, or were they based on, say, the Pakistani designs?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> Again, we don't know the answer to most of those questions. As far as the control room and those capabilities, the computers, the flat-panel monitors, and so forth, none of those things are on the export control list, so it's not a surprise they have them. I was just surprised because I hadn't seen anything else that was that modern in that facility. </p>

<p>As far as the centrifuges themselves, again we're not certain. But our best estimate is that we still don't think they have the ability to make their own high-strength steel and high-strength aluminum alloys, so they must have procured that from somewhere else. </p>

<p>But, of course, if you look back over their procurement history, there are many cases where the North Koreans were either suspected or we know that they had procured some of these materials.</p>

<p>The North Koreans have had a very active procurement network for many years, so my own view is that most likely they made procurements for the last 10&#150;15 years or so, and they would then put it all together. </p>

<p>Most likely, they put it together themselves domestically, but they were able to get the components (ring magnets, bearings, vacuum valves, and so forth) in the international market. And these components and materials are on the export control list, but it looks likely they were able to work around the export control restrictions.</p>

<p>This is as much as I want to lay out at this point until I really have more chance to go through, analyze, and think this through. What you're getting now is sort of my top-of-the-head reaction to what I saw, and trying to interpret, how were they able to do this? I wouldn't call this a deep scientific analysis. </p>

<p>In fact, one of the reasons for getting this story out there this quickly is for other people who have been analyzing North Korea for a long time, to now work what I saw on the ground, to see if we can come up with a better analysis of what actually happened. </p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> So how much feedback have you had?</p>

<p><span style="color:#006699"><strong>HECKER:</strong></span> I've heard nothing directly back from the North Koreans. However, if you look at the pronouncements of the official North Korean news agency, KCNA, two days after all the flurry of the news of my report, KCNA went ahead and essentially stated what I stated in my report: They are enriching uranium, that it's for peaceful purposes, and they have several thousand centrifuges, in a modern facility. So it's quite remarkable that the North Koreans said that. So one has to look at the timing; they waited to just right after my report, and then they came in and said, "That's what we have."</p>]]>
        
    </content>
</entry>

<entry>
    <title>Q&amp;A with Australia&apos;s science minister</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2011/01/qa-with-australias-science-minister.html" />
    <id>tag:blogs.physicstoday.org,2011:/singularities//17.6587</id>

    <published>2011-01-18T20:27:58Z</published>
    <updated>2011-05-19T18:27:36Z</updated>

    <summary><![CDATA[In early December, the Australian government invited four North American journalists&mdash;including Physics Today's editor-in-chief Steve Benka&mdash;to visit Australia and learn about the country's many efforts, initiatives, and successes in scientific research and innovation. As part of the visit, the journalists...]]></summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Biography and personalities" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p>In early December, the Australian government invited four North American journalists&mdash;including <em>Physics Today</em>'s editor-in-chief Steve Benka&mdash;to visit Australia and learn about the country's many efforts, initiatives, and successes in scientific research and innovation.</p>

<p>As part of the visit, the journalists were given the opportunity to submit written questions to Australia's minister for innovation, industry, science, and research, Kim Carr. Here are some of the questions asked by <em>Physics Today</em> and the answers.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="kim_carr.jpg" src="http://blogs.physicstoday.org/singularities/kim_carr.jpg" width="269" height="440" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How does Australia set its priorities for funding science? </p>

<p><span style="color:#006699"><strong>CARR:</strong></span> The possibilities created by science and investment in research are endless.</p>

<p>There will always be competing priorities. This is why we need to make strategic decisions for investment and we base these on what is in Australia&#8217;s best interests.</p>

<p>The Australian government seeks value from its investment in research infrastructure. We aim to ensure that any investment in future research infrastructure is targeted to provide maximum benefit to Australia&#8217;s innovation system.</p>

<p><strong>The National Research Infrastructure Council</strong></p>

<p>In 2009 the government created the <a href=http://www.innovation.gov.au/Science/ResearchInfrastructure/Pages/NRIC.aspx>NRIC</a> to provide strategic advice on future research infrastructure investments in Australia.</p>

<p>The council is made up of research leaders from across a wide range of research disciplines. Its role is to ensure that we do not lose sight of the future needs of our researchers, our industries, and our communities.</p>

<p>It is vital to have such people advising on the best way to fund research infrastructure in Australia. The council&#8217;s work complements other consultation mechanisms to allow our leading research institutions to share their insights with government.</p>

<p><strong>Landmark research infrastructure projects</strong></p>

<p>In assessing Australia&#8217;s priorities in research funding, a process is needed to specifically assess competing &#8220;landmark&#8221; research infrastructure projects. These are research infrastructure projects that require funding from the Australian government in excess of AU$100 million for the first five years of a project. (Australian and US dollars are almost equal in nominal value.)</p>

<p>NRIC has consulted with the Australian research community and recently proposed a process to the government which is under consideration. Until such time as a landmark research infrastructure process is announced, it would be inappropriate to comment in detail on what the process might be. However, the <a href=http://www.innovation.gov.au/Science/ResearchInfrastructure/Documents/Strategic%20Framework%20for%20Research%20Infrastructure%20Investment%20-%20Discussion%20Paper.pdf>discussion paper</a> released by NRIC offers some insights into issues associated with a landmark research infrastructure process in an Australian context.</p>

<p>The objective of developing this process is to ensure greater certainty for the scientific community on how decisions are made and the opportunity to focus effort in developing proposals.</p>

<p>It will also contribute to improved scientific outcomes generated by the increased stock of research infrastructure where funding flows to landmark research infrastructure projects are made.</p>

<p>Finally, it will contribute to a more transparent decision-making process by governments, offering greater accountability in the use of taxpayer funds.</p>

<p><strong>Assessing competing priorities</strong></p>

<p>Priorities are established in a number of ways and in the past we have relied on road mapping as the key method for making decisions.</p>

<p>This approach has worked well and we intend to develop a new road map for research infrastructure in Australia to be released in the latter part of 2011.</p>

<p>In addition to the road map we are currently developing a strategic framework for research infrastructure in Australia. These two strategic documents will be finalized in consultation with the sector and will aim to set out priorities for research infrastructure capabilities and provide a foundation for the department to inform the Australian government regarding the needs of the sector for future funding.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How do the government and the scientific community interact? </p>

<p><span style="color:#006699"><strong>CARR:</strong></span> The scientific community is a source of knowledge and expertise that the Australian government regularly draws upon.</p>

<p>Our consultation with the scientific community spans many activities from projects like the upcoming 2011 <em>Strategic Roadmap for Australian Research Infrastructure</em>, to leveraging support for the <a href=http://www.skatelescope.org/>Square Kilometre Array</a>. </p>

<p>We regularly interact with diverse groups including federal government agencies like the Australian Nuclear Science and Technology Organisation (<a href=http://www.ansto.gov.au/>ANSTO</a>), Commonwealth Scientific and Industrial Research Organization (<a href=http://www.csiro.au/>CSIRO</a>), the Bureau of Meteorology (<a href=http://www.bom.gov.au/>BOM</a>), and the Australian Institute of Marine Science (<a href=http://www.aims.gov.au/>AIMS</a>); state and territory agencies; and nongovernment groups like academies, universities, and research institutions.</p>

<p>The way we consult varies depending on the issues at hand and includes</p>

<ul>
<li>discussion papers for comments and written submissions, 
<li>forums and conferences, 
<li>and individual meetings and workshops.
</ul>

<p>We also engage the scientific community through our advisory structures by having representatives from across the sector sitting on scientific advisory boards like the Prime Minister&#8217;s Science, Engineering and Innovation Council (<a href=http://www.innovation.gov.au/Science/PMSEIC/Pages/default.aspx>PMSEIC</a>) and the National Research Infrastructure Council (<a href=http://www.innovation.gov.au/Science/ResearchInfrastructure/Pages/NRIC.aspx>NRIC</a>).</p>

<p>Collaboration is the key to innovation. By drawing on the best minds from across the research community, industry, and government we achieve the best results.</p>

<p>We also recognize that collaboration should not be limited to program design; this is why we interact with the scientific community broadly and continuously when undertaking our policy development and evaluation activities.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What is the Australian government doing to attract young Australians to careers in science and non-Australians to work in the country&#8217;s universities, research institutes, and high-tech industries? Does Australia's 1% graduate tax hurt those efforts?</p>

<p><span style="color:#006699"><strong>CARR:</strong></span> <strong>Research workforce strategy</strong></p>

<p>The Department of Innovation, Industry, Science, and Research is currently anchoring the development of a Research Workforce Strategy to ensure that Australia is able to meet expected shortfalls in the supply of research-qualified people. The strategy will also address concerns regarding the lack of clear career paths for research students and the adequacy of the research training system to effectively prepare them for varied career outcomes.</p>

<p>Work to date has included consultation with a wide range of interested parties. A workshop with higher degree by research (PhD and research master&#8217;s) students was held in December 2009 to examine issues faced by HDR students in completing their studies and embarking on research careers. There have also been consultations with public and private sector employers, researchers, and research leaders.</p>

<p>The department also commissioned two studies: Employer Demand for Researchers in Australia and Australia&#8217;s Future Research Workforce&mdash;Supply, Demand and Influence Factors. Both these studies are available on the <a href=http://www.innovation.gov.au/RESEARCH/RESEARCHWORKFORCEISSUES/Pages/default.aspx>department&#8217;s website</a>.</p>

<p>The strategy, which goes out to 2020, will be provided to the minister for innovation, industry, science, and research for consideration by the end of 2010.</p>

<p><strong>Data on higher degrees earned by research students</strong></p>

<p>Data on higher education in Australia, including information relating to higher degree by research (HDR) candidates is collected through the Higher Education Information Management System (HEIMS) administered by the Department of Education, Employment and Workplace Relations (DEEWR). The data include information on commencement, completion and attrition rates, demography, and field of education. Further information can be found on the <a href=http://www.deewr.gov.au/HigherEducation/Publications/HEStatistics/Pages/Default2.aspx>DEEWR website</a>. </p>

<p><strong>Attracting young people into science careers</strong></p>

<p>The Australian government conducts a number of activities to attract young people into science careers, including through DEEWR. More information can be found on the <a href=http://www.deewr.gov.au>DEEWR website</a>.</p>

<p>DIISR is responsible for a suite of programs for young people, including programs and initiatives managed by <a href=http://www.questacon.edu.au/#canberra>Questacon</a>, Australia&#8217;s national technology and science center.</p>

<p>Questacon programs include Questacon Science Play, which offers a hands-on science session for children aged 2&ndash;5 years and a workshop for educators; the Questacon Science Squad, which performs exciting and entertaining science shows for schoolchildren of all ages; and the <a href=http://mathssquad.questacon.edu.au/>Tenix Questacon Maths Squad</a>, which offers exciting presentations and over 500 hands-on puzzles, tasks, and activities to challenge and excite young students.</p>

<p>The <a href="http://www.innovation.gov.au/Science/InspiringAustralia/Pages/default.aspx"><em>Inspiring Australia</em> report</a> provides a national strategy for engagement with the sciences. The strategy aims to build a strong, open relationship between science and society, underpinned by effective communication of science and its benefits. In line with the report&#8217;s recommendations, the Australian government has announced AU$21 million as part of the Science for Australia&#8217;s Future policy. This will include continued support for the Prime Minister&#8217;s Prizes for Science and National Science Week, and other science events and activities to unlock Australia&#8217;s full potential, including programs for young people, and activities targeting regional and remote areas. These activities all contribute to the objective of promoting scientific careers among young Australians.</p>

<p><strong>Higher Education Loan Program (HELP)</strong></p>

<p>It is not correct that Australia applies an additional 1% tax on graduates of Australian universities. Under the Higher Education Support Act 2003, the Australian government subsidizes higher education through the funding of Commonwealth supported places and providing eligible students with Higher Education Loan Program (HELP) loans. Most undergraduate students studying at university are enrolled in Commonwealth-supported places, available at all public universities and some approved private higher education providers (in identified areas of national priority). </p>

<p>A key equity feature of Australia&#8217;s higher education system is the loan arrangements available under the HELP scheme, which ensure that eligible students are not prevented from participating in higher education if they are unable to pay their tuition costs up front.</p>

<p>Eligible students may take out a HELP loan for their tuition costs, and repay the debt later through the taxation system. Eligible Commonwealth-supported students who opt to pay their student contribution up front receive a 20 percent discount funded by the government. </p>

<p>HELP debts have no interest and have income contingent repayment arrangements. Outstanding loan balances are indexed only to maintain their real value, and people are required to make repayments only when their income reaches the minimum threshold for compulsory repayment (AUS$44&thinsp;912 for 2010&ndash;11, indexed for later years). Loan repayments are returned through the Australian taxation system to consolidated revenue and are available for general expenditure on government services. If a HELP debt is never repaid because of low income, the government meets the cost. </p>

<p><strong>Measures to encourage the study of and careers in science</strong></p>

<p>The government has committed to encouraging more people to study science (and mathematics). From 1 January 2009, the maximum annual student contribution amount for commencing Commonwealth-supported students studying science and mathematics units was reduced to the "national priority" rate (per equivalent full-time load), taking it from AU$7567 to the lowest "national priority" rate of AU$4249 (2010 rates, indexed for later years). The government is meeting the cost by paying universities the difference between the new lower student contribution amount and the previous amount.</p>

<p>Further, to encourage skilled graduates to work in related fields, the government introduced the HECS-HELP benefit initiative. This initiative provides a reduction in compulsory HELP debt repayments for science and mathematics graduates who go on to work in related professions, including teaching of these subjects in secondary school and primary school teaching. The benefit reduces their compulsory repayments by up to $1558.50 in 2009&ndash;10 (indexed in later years). A person will be able to receive the benefit for up to a lifetime maximum of the equivalent of five years of eligible employment.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> How do you balance participation in international programs with internal pressures to fund researchers? What is the level of scientific cooperation and collaboration between Australia and China and between Australia and its other regional neighbors? </p>

<p><span style="color:#006699"><strong>CARR:</strong></span> It is not an either/or situation. Australia recognizes that, to be effective, support for Australian research must include engagement with international research programs.</p>

<p>The Australian government recently announced in the Science for Australia's future policy statement that it would strengthen Australia&#8217;s links with the best international researchers and institutions and forge closer partnerships with leading players.</p>

<p>International collaboration builds capacity, facilitates access to new knowledge, attracts foreign investment, and extends Australia&#8217;s global influence. </p>

<p>International science engagement is essential to maximize the economic, social, and environmental impact of Australian research and to leverage Australia&#8217;s investment in science and innovation. </p>

<p>Collaboration with other countries provides Australian researchers with access to additional expertise and infrastructure, and significantly increases the scale and effectiveness of Australia&#8217;s research effort. These considerations underpin the government&#8217;s adoption of a National Innovation Priority that seeks to increase international research collaboration by Australian researchers and businesses.</p>

<p>Australia will also mainstream its support for international research collaboration through a variety of mechanisms: Australian Research Council (ARC) grants support international collaboration; the Commonwealth Scientific and Industrial Research Organisation&#8217;s (CSIRO) Flagship Collaboration Fund enables international participation in large-scale multidisciplinary research partnerships; the Cooperative Research Centres (CRC) program encourages CRCs to engage globally and seek co-investment from international organizations; and increased support for university research in the 2009&#150;10 budget is laying the foundations for more international collaboration between individuals and institutions.</p>

<p>Australian governments conduct regular reviews into the effectiveness and value of funding programs, reassessing priorities in light of the broader government agenda, and balancing fiscal responsibilities to deliver social and economic benefit to all Australians.</p>

<p><strong>Australia&ndash;China Science and Research Collaboration</strong></p>

<p><em>Level of Cooperation</em>: China has rapidly emerged as a global power in science and research.</p>

<p>Australia views China as a priority partner for bilateral science collaboration, and science and research cooperation is a key component of the broader Australia&#150;China relationship. The number of publications with Australian and Chinese co-authors rose from 114 in 1996 (our 12th most important partner) to 2295 in 2009 (our 3rd partner behind the US and UK). Australia rose from 10th to 6th amongst China&#8217;s partners in the same period.</p>

<p>Australia and China enjoy an enduring relationship, nurtured over the last 30 years at the government-to-government level. This is achieved within the framework of the bilateral Treaty on Cooperation in Science and Technology, signed in 1980. It has been given effect by the signing of a subsequent Memorandum of Understanding (MOU) on Cooperation in Science and Technology in 1989, and with the MOU on a Special Fund for Scientific and Technological Cooperation in 2000 (updated in 2005 and 2007). Bilateral discussions occur through Joint Science and Technology Commission meetings, every two to three years.</p>

<p>Australia achieves many of its objectives in the bilateral science relationship by working with the Australian Academy of Science (<a href=http://www.science.org.au/>AAS</a>) and the Australian Academy of Technological Sciences and Engineering (<a href=http://www.atse.org.au/>ATSE</a>). Both of these academies have their own MOUs with counterpart Chinese agencies.</p>

<p>Many other arms of the Australian government have formal arrangements with Chinese partners covering research in specific areas. Publicly funded research agencies like the Commonwealth Scientific and Industrial Research Organisation (CSIRO) also have formal arrangements for research collaboration and exchanges of staff. Australian universities have also established collaborative partnerships with Chinese and other international partners.</p>

<p>Some key examples of the many Australia&ndash;China collaborative programs are:</p>

<ul>
<li>ATSE facilitates a Young Scientists Exchange Program, a project that enables young Australian and Chinese scientists to visit counterparts and establish relationships leading to new international collaborations.
<li>The Australia&ndash;China Special Fund for Scientific and Technological Cooperation (&#8216;the Special Fund&#8217;), launched in 2001, is the major earmarked bilateral government funding source for collaborative research projects between Australian and Chinese research organizations across diverse fields of science. To date, 133 projects have been supported by the Australian government with around $11 million, with 79 still active. Outcomes of projects have included advancements in diabetes treatments, mapping brain connections and function for studying multiple sclerosis, development of a new shape-memory alloy, a more effective method for removing lead pollution from waste water, and a new gas turbine for reducing fugitive mine emissions and utilizing methane as a clean energy source.
</ul>

<p>A sample of 30 projects chosen to illustrate the scope of the relationship can be found in an official <a href=http://www.innovation.gov.au/Science/Documents/AustraliaChinaBook.pdf>commemorative book</a>.</p>

<p><strong>Other regional partners</strong></p>

<p>Australia currently has 28 formal S&T cooperation agreements with a range of regional partner countries. Government-supported science collaboration with these and other countries is supported through a range of mechanisms including the International Science Linkages program, the Australian Research Council, the National Health and Medical Research Council, and AusAID. The level of government-supported collaboration varies over time, and is driven according to mutual government interests and priority setting.</p>

<p>Government support for bilateral S&T collaboration with India is facilitated by a range of mechanisms including the Australia&ndash;India Strategic Research Fund (<a href=https://grants.innovation.gov.au/AISRF/Pages/Home.aspx>AISRF</a>). This fund supports joint research projects between Indian and Australian scientists across a broad range of disciplines including renewable energy, nanotechnology, biotechnology, and agricultural science.</p>

<p>The AISRF was launched in 2006. In November 2009, the prime ministers of Australia and India announced that the fund would be extended and expanded. With a total Australian commitment of $65 million, matched by the government of India, the AISRF is by a considerable margin Australia&#8217;s largest fund dedicated to research collaboration with any country, and one of India&#8217;s largest sources of support for international science.</p>

<p>There are around 65 projects currently underway, drawing in top scientists at India&#8217;s premier universities and research institutes with their counterparts in Australia.</p>

<p>As part of the expanded fund, in November 2010 the two governments launched a new "grand challenge fund" component that will support larger projects in the areas of energy, food and water security, health, and the environment. A new researcher exchange scheme, which aims to award travel grants to Australian and Indian early career researchers, is expected to be launched in the first half of 2011.</p>

<p><span style="color:#FF0000"><strong>PT:</strong></span> What else would you like readers of <em>Physics Today</em> to know about science in Australia?</p>

<p><span style="color:#006699"><strong>CARR:</strong></span> Over the last few years (2007&#150;8 to 2010&#150;11), our support for science, research, and innovation research and development has increased by 34% to $8.92 billion.</p>

<p>To continue to work toward our goal of a scientifically engaged Australia, the government has committed $21 million over three years (2011/12&#150;2013/14) to fund the initial implementation of the strategy outlined in the <em>Inspiring Australia</em> report.</p>

<p>The <em>Inspiring Australia</em> report is available at http://www.innovation.gov.au.</p>

<p>This new national strategy for community engagement with the sciences will continue the successes of the Science Connections Program (SCOPE) concluding in June 2011 and, in addition, will coordinate Australia&#8217;s fragmented science communication activities and maximize their impact by harnessing business and community support. This new program will</p>

<ul>
<li>focus on recognizing achievement including the continuation of the Prime Minister&#8217;s Prizes for Science;
<li>continue to provide hundreds of opportunities for all Australians to be involved in science through National Science Week;
<li>develop strategies for unlocking Australia&#8217;s potential by reaching Australians across every region of this country through best practice science communication approaches;
<li>connect with mainstream and new media to boost science literacy in the media and to support quality science communication to the general public.
</ul>
</ul>]]>
        
    </content>
</entry>

<entry>
    <title>IPF 2010 wrap-up</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2010/11/ipf-2010-wrapping-up-the-forum.html" />
    <id>tag:blogs.physicstoday.org,2010:/singularities//17.6360</id>

    <published>2010-11-11T18:30:15Z</published>
    <updated>2010-11-18T16:39:21Z</updated>

    <summary> The 2010 Industrial Physics Forum (IPF), held in conjunction with the joint meeting of the Optical Society of America and the American Physical Society, has ended. In celebration of the 50th anniversary of the laser&#8217;s invention, the two-day IPF...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Condensed matter" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="http://www.aip.org/industry/ipf/"><img alt="Thumbnail image for IPF_2010_logo.jpg" src="http://blogs.physicstoday.org/singularities/assets_c/2010/10/IPF_2010_logo-thumb-150x184.jpg" width="150" height="184" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></a></span> The 2010 Industrial Physics Forum (IPF), held in conjunction with the joint meeting of the Optical Society of America and the American Physical Society, has ended. In celebration of the 50th anniversary of the laser&#8217;s invention, the two-day IPF gathering had as its theme the usefulness of lasers in industrial research; OSA, frontiers in optics; and APS, laser science. </p>

<p>Most of the attendees agreed that holding the IPF gathering within the larger scientific venue was advantageous. There were plenty of great talks to attend; those held by the IPF were standing room only. Graduate students were crowding in at the doors for almost every presentation, a good sign that the speaker and topic were of pressing interest.</p>

<p>The IPF talks were divided into four sessions. One was devoted to biomedical applications, including a new laser system to perform cataract surgery, tabletop lasers that deliver beams normally found only at much larger free-electron-laser facilities, lasers that <a href="http://blogs.physicstoday.org/singularities/2010/10/ipf-2010-dna-sequencing-faster-faster-ever-moore.html">speed up DNA sequencing</a>, and optical coherence tomography that delivers much sharper biomedical images.</p>

<p>Another centered on lasers that are used in environmental research, including lidar to map Earth&#8217;s resources, <a href="http://blogs.physicstoday.org/singularities/2010/11/ipf-2010-quantum-cascade-lasers-enter-the-marketplace.html">quantum cascade lasers in sensors</a>, lasers to measure product emissions, and lasers for <a href="http://blogs.physicstoday.org/singularities/2010/11/ipf-2010-probing-planets-with-lidar.html">remote sensing of Earth and other planets</a>. The third session highlighted lasers used in metrology for applications such as timekeeping, fixing microcircuits, measuring position during lens polishing, and <a href="http://blogs.physicstoday.org/singularities/2010/10/ipf-2010-redefining-the-kilogram.html">redefining the kilogram</a>.</p>

<p>The fourth session was devoted to four general areas of research at the forefront of physics that might not necessarily have an immediate bearing on industrial applications. They were <a href="http://blogs.physicstoday.org/singularities/2010/10/ipf-2010-baby-phase-transition-multilayer-graphene-lhc-now.html">graphene</a>, which was the subject of this year&#8217;s Nobel Prize in Physics; the <a href="http://blogs.physicstoday.org/singularities/2010/10/ipf-2010-imagining-the-universe-one-photon-at-a-time.html"><em>Fermi Gamma-ray Space Telescope</em></a>, which currently provides the best view of the sky at gamma-ray wavelengths; the <a href="http://blogs.physicstoday.org/singularities/2010/10/ipf-2010-baby-phase-transition-multilayer-graphene-lhc-now.html">Large Hadron Collider</a>, which just passed a milestone for beam luminosity; and <a href="http://blogs.physicstoday.org/singularities/2010/10/ipf-2010-baby-phase-transition-multilayer-graphene-lhc-now.html">quantum entanglement</a>, at the heart of what will eventually be quantum computing.</p>

<p>The forums normally occur at 12-month intervals, but the next one will take place only 6 months from now. It will be convened at the March APS Meeting in Dallas, and the theme will be the 100th anniversary of the discovery of superconductivity.</p>

<p>Phil Schewe</p>

<p><em>All the talks at IPF 2010 were recorded and are now <a href="http://www.aip.org/industry/ipf/2010/presentations.html">available on video</a>.</em></p>]]>
        
    </content>
</entry>

<entry>
    <title>IPF 2010: Quantum cascade lasers enter the marketplace</title>
    <link rel="alternate" type="text/html" href="http://blogs.physicstoday.org/singularities/2010/11/ipf-2010-quantum-cascade-lasers-enter-the-marketplace.html" />
    <id>tag:blogs.physicstoday.org,2010:/singularities//17.6336</id>

    <published>2010-11-05T19:28:12Z</published>
    <updated>2010-11-18T16:40:14Z</updated>

    <summary> Federico Capasso stood unassumingly against the backdrop of a LaserFest sign at the 2010 Industrial Physics Forum in Rochester, New York. The Harvard University physicist&apos;s eyes were fixed on his PowerPoint slides. He seemed unaware that the 150-seat presentation...</summary>
    <author>
        <name>Physics Today</name>
        <uri>http://physicstoday.org</uri>
    </author>
    
        <category term="Business and industry" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Condensed matter" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Instrumentation" scheme="http://www.sixapart.com/ns/types#category" />
    
        <category term="Materials science" scheme="http://www.sixapart.com/ns/types#category" />
    
    
    <content type="html" xml:lang="en" xml:base="http://blogs.physicstoday.org/singularities/">
        <![CDATA[<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="http://www.aip.org/industry/ipf/"><img alt="Thumbnail image for IPF_2010_logo.jpg" src="http://blogs.physicstoday.org/singularities/assets_c/2010/10/IPF_2010_logo-thumb-150x184.jpg" width="150" height="184" class="mt-image-left" style="float: left; margin: 0 20px 20px 0;" /></a></span> <a href="http://www.seas.harvard.edu/capasso/">Federico Capasso</a> stood unassumingly against the backdrop of a LaserFest sign at the 2010 Industrial Physics Forum in Rochester, New York. The Harvard University physicist's eyes were fixed on his PowerPoint slides. He seemed unaware that the 150-seat presentation room was filled to nearly twice its capacity.</p>

<p>Evidently, Capasso and his topic, the physics and technology of quantum cascade lasers (QCLs), were big draws at this year's IPF, held in conjunction with the 94th Frontiers in Optics Conference. Despite his academic affiliation, Capasso is eminently qualified to present at the IPF. Not only did he and his colleagues develop QCLs while working at Bell Labs in the 1990s, but QCLs, which are based on semiconducting nanomaterials and emit in the IR range,  have already found several industrial applications (see the 2002 <em>Physics Today</em> <a href="http://scitation.aip.org/journals/doc/PHTOAD-ft/vol_55/iss_5/34_1.shtml">article</a> by Capasso, Claire Gmachl, Deborah Sivco, and Alfred Cho). </p>

<p>Unlike traditional LEDs, which emit photons when electrons and holes recombine, QCLs emit photons when electrons tunnel through nanometer-thin layers of a semiconductor. In essence, the electrons cascade down an energy staircase of quantum wells. Because the electrons emit a photon at each step in the staircase, QCLs attain a high level of quantum efficiency. Moreover, the laser can be made multispectral by varying the composition, and consequently the bandgap, of the semiconductor materials.</p>

<p><strong>From promise to products</strong><br />
 <br />
When QCLs debuted in 1994, their promise was clear, thanks to two rare properties. QCLs can emit at more than one wavelength and in the region of the IR spectrum where molecules' characteristic and identifying features reside. A host of commercial applications came to mind in such fields as atmospheric chemistry and explosives detection.</p>

<p>However, it was also clear that obstacles lay in the path toward making QCLs practical. In her 1994 <em>Physics Today</em> <a href="http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PHTOAD000047000007000020000001&idtype=cvips&gifs=yes">news story</a>, my colleague Barbara Goss Levi noted that the prototypes required high electric current, and therefore compensatory cooling, to reach useful intensities.</p>

<p>Within two years, Capasso and dozens of other academic and industrial researchers had succeeded in increasing output power while decreasing input current, mostly by modifying the staircase structure and fine-tuning the material composition. Now, 16 years after their discovery, QCLs exist as portable, commercial, and continuous-wave, room-temperature devices that lase efficiently from the 3- to 25-&mu;m molecular-fingerprint region up to 300 &mu;m with sensitivities in the parts per billion.</p>

<p>In his talk Capasso listed 17 companies pursuing or already selling QCL-based products. He highlighted <a href="http://www.pranalytica.com/">Pranalytica</a>, which came out first with a commercial continuous-wave, room-temperature QCL. Among the California-based company's products is a mid-IR flashlight useful for soldiers, with battery life up to 24 hours, shown here, and a laser that essentially blinds the IR sensor of heat-seeking missiles.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="Flashlight.jpg" src="http://blogs.physicstoday.org/singularities/Flashlight.jpg" width="400" height="86" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Another company, <a href="http://www.daylightsolutions.com/">Daylight Solutions</a>, in collaboration with Rice University Nobel chemist Robert Curl, has developed a real-time breath analyzer that detects ammonia (a marker for kidney disease).</p>

<p>Earth scientists have also employed the QCL for spectroscopic analysis of atmospheric chemicals. Using aircraft-borne QCL sensors, NASA scientists, in collaboration with Capasso's Harvard lab, have measured trace concentrations of atmospheric methane and nitrous oxide. And <a href="http://www.mirthecenter.org/">a group</a> based at Princeton University measured ozone levels during the 2008 Olympics in Beijing. </p>

<p>Massachusetts-based <a href="http://www.aerodyne.com/">Aerodyne Research</a> sees profitable opportunities in a world where carbon dioxide and other industrial byproducts are increasingly regulated. In a presentation that followed Capasso's, Aerodyne president Charles Kolb told the IPF that he is investing in QCLs as a sensitive and flexible tool for measuring industrial emissions. Aerodyne, in collaboration with Capasso's group, conducted measurements of greenhouse gases in the stratosphere and troposphere, detecting concentrations as low as 30 parts per billion by volume.</p>

<p>Aerodyne is also applying QCLs at ground level. The company has developed QCL systems that measure the emissions from airplanes taxiing and taking off and from cars and trucks on the highway. Aerodyne's roadside monitor sucks in the exhaust of passing cars and analyzes it within seconds. Not stopping there, the company also has what Kolb calls "a mobile lab on a FedEx truck," shown here, that can tail vehicles and monitor their emissions as a function of time and location.</p>

<p><span class="mt-enclosure mt-enclosure-image" style="display: inline;"><img alt="MobileLab.jpg" src="http://blogs.physicstoday.org/singularities/MobileLab.jpg" width="400" height="229" class="mt-image-center" style="text-align: center; display: block; margin: 0 auto 20px;" /></span></p>

<p>Using its QCL systems, Aerodyne uncovered a rare piece of environmental good news from, of all places, the center of the US oil industry: Houston, Texas. Aerodyne compared its 2009 data on gasoline- and diesel-vehicle emissions in the city with similar data collected in 2000. It found that the concentrations of carbon monoxide and nitrous oxides dropped by 40% and 50%, respectively. Now we don't have to hold our breaths while we wait for electrical vehicles to take over the world.</p>

<p>Jermey N. A. Matthews</p>

<p><em>All the talks at IPF 2010 were recorded and are now <a href="http://www.aip.org/industry/ipf/2010/presentations.html">available on video</a></em>.</p>]]>
        
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