Science & Technology

Stemler Published in Journal of Study Abroad, Educational Psychology

Steve Stemler, associate professor of psychology, is the co-author of “Development and Validation of the Wesleyan Intercultural Competence Scale (WICS): A Tool for Measuring the Impact of Study Abroad Experiences,” published in Frontiers: the Interdisciplinary Journal of Study Abroad, XXIV, 25-47, 2014.

He’s also the co-author of “Testing the theory of successful intelligence through educational interventions in Grade 4 language arts, mathematics and science,” published in the Journal of Educational Psychology, 106(3), 881-899, 2014.

BIology Students Learn about Summer Research Programs

On Nov. 17 and 19, Ruth Johnson, assistant professor of biology, spoke to sophomores and juniors about applying to summer research programs. During the two-session workshop, Johnson discussed ways to write successful applications for summer programs at U.S. research institutions.

On Nov. 17 and 19, Ruth Johnson, assistant professor of biology, spoke to sophomores and juniors about applying to summer research programs. During the two-session workshop, Johnson discussed ways to write successful applications for summer programs at U.S. research institutions.

Students were required to attend both sessions and complete a mock application. The workshop also provided guidance on locating appropriate summer research programs and requesting supporting letters of recommendation.

Students were required to attend both sessions and complete a mock application. The workshop also provided guidance on locating appropriate summer research programs and requesting supporting letters of recommendation. (Photos by Dat Vu ’15)

Space Grant Consortium Awards Graduate Students’ Travel Grants

The NASA Connecticut Space Grant Consortium awarded two Student Travel Grants on Nov. 11. Each award is worth $1000.

Lisa Korn, a graduate student in earth and environmental sciences, will attend the Lunar and Planetary Science Conference, held March 16-20 in The Woodlands, Texas. Her advisor is Marty Gilmore, chair and professor of earth and environmental sciences and the George I. Seney Professor of Geology.

Sam Factor, a BA/MA student in astronomy, will use the grant to attend the American Astronomical Society 223rd Meeting, held Jan 4-8 in Seattle, Wash. Factor’s advisor is Meredith Hughes, assistant professor of astronomy. Dilovan Serindag ’15, Jesse Lieman-Sifry ’15 and Trevor Dorn-Wallenstein ’15 also will attend the meeting.

ITS Launches Security Awareness Campaign

The ITS training videos teach computer users about cyber criminals.

The ITS training videos teach computer users about cyber criminals.

As part of National Cyber Security Awareness Month in October, Information Technology Services launched a new security awareness campaign titled “Protecting You, Securing Wesleyan”.

The campaign consists of security awareness training videos; tips and tricks provided on the ITS Facebook and Twitter pages; posters distributed around campus; and a new website about cyber security initiatives on campus. The information will help Wesleyan faculty, staff and students be safer online, at work, home or on the road.

Yohe: Scientists Press for Climate Change Action

Gary Yohe, the Huffington Foundation Professor of Economics and Environmental Studies, co-authored an op-ed published in The Hartford Courant calling on the government to take action on climate change. The op-ed follows the recent release of the Intergovernmental Panel on Climate Change’s (of which Yohe is a senior member) Synthesis Report, which ties together “in a  clear and actionable way” findings on the risks and threats climate change poses to human society.

Business leaders have shown they’re ready to take action in response to these findings, “but they’re looking to politicians to implement policies that provide the regulatory certainty they need. The sooner businesses know what policies governments will enact to reduce carbon emissions, they better they can tailor their plans and continue to spur unhindered economic growth,” write Yohe and Mindy Lubber, president of Ceres, a nonprofit organization that mobilizes businesses to embrace a sustainable future.

Read the whole piece here. Yohe, who is also chair and professor of economics, professor of environmental studies, also spoke to The Washington Post recently about the new synthesis report:

“It’s not too late, but the longer you wait, the more expensive it gets,” Gary Yohe, a Wesleyan University professor who also participated in the drafting of the report, said in an interview. Damage to the Earth’s ecosystems is “irreversible to the extent to which we have committed ourselves, but we will commit ourselves to higher and higher and higher damages and impacts” if the world’s leaders fail to act, Yohe said.

Yohe also participated in a panel discussion about the new report on KQED Radio’s “Forum with Michael Krasny.”

Neuroscience Training Influences Lee’s (’12) Art

Gizmodo features the artwork of Timothy “Timmy” Lee ’12. A neuroscience and behavior, biology and studio arts triple major, Lee always loved drawing but decided to pursue art professionally during his last year at Wesleyan, abandoning plans to attend medical school. According to the article, his time as a neuroscience student is apparent in his work: “These beautiful sculptures and paintings are his way of digging inside his own complex and sometimes disturbing personality.”

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Northrop Teaches Students at Green Street about Polymers through Putty Workshop

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Brian Northrop teaches a student at the Green Street Arts Center how to properly mix the putty’s ingredients.

On Nov. 3, Brian Northrop, assistant professor of chemistry, spoke to students at the Green Street Arts Center about polymers. As part of the hands-on workshop, Northrop taught the participants how to make their own silicone polymer putty with glue, water, Borax and food coloring.

Similar putty was accidentally invented during World War II when an American scientist working for General Electric in New Haven, Conn. was trying to create synthetic rubber using silicone oil and boric acid. The result produced a “solid-liquid” goo that had a high melting temperature, could bounce when dropped, and stretch. The product is most commonly known as Silly Putty, a trademark of Crayola LLC.

Northrop’s workshop is funded through a 2014 Faculty Early Career Development (CAREER) award. This is the second year that he’s taught students at the GSAC.

Photos of the polymer workshop are below: (Photos by Olivia Drake)

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Studies by Varekamp, Thomas Published in Paleoceanography

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Joop Varekamp

Ellen Thomas

Ellen Thomas

Wesleyan faculty Joop Varekamp and Ellen Thomas are among the authors of a paper on rates of sea-level rise along the eastern U.S. seaboard titled “Late Holocene sea level variability and Atlantic Meridional Overturning Circulation,” published in the journal Paleoceanography, Volume 29, Issue 8, pages 765–777 in August 2014. Varekamp is the Harold T. Stearns Professor of Earth Science, professor of earth and environmental sciences and professor of environmental studies. Thomas is research professor of earth and environmental sciences at Wesleyan, and also a senior research scientist in geology and geophysics at Yale University.

Ellen Thomas discovered that microfossils, such as this  foraminifera fossil, reveal that warm oceans had less oxygen.

Ellen Thomas discovered that microfossils, such as this foraminifera fossil, reveal that warm oceans had less oxygen.

Pre-20th century sea level variability remains poorly understood due to limits of tide gauge records, low temporal resolution of tidal marsh records, and regional anomalies caused by dynamic ocean processes, notably multidecadal changes in Atlantic Meridional Overturning Circulation (AMOC). In the study, Varekamp and Thomas examined sea level and circulation variability along the eastern United States over the last 2,000 years, using a sea level curve constructed from proxy sea surface temperature records from Chesapeake Bay, and 20th century sea level-sea surface temperature relations derived from tide gauges and instrumental sea surface temperatures.

Thomas also is a co-author of a paper titled ‘I/Ca evidence for upper ocean deoxygenation during the PETM‘ published in the Paleoceanography, October 2014.

In this paper, Thomas suggests that the Paleocene-Eocene Thermal Maximum (PETM), a potential analog for present and future global warming, may help in such forecasting future deoxygenation and its effects on oceanic biota. Forecasting the geographical and bathymetric extent,

Makri’s Power Limiter Research Noted in Scientific Reports Article

Makri used a power limiter consisting of a nonlinear lossy layer embedded in two mirror layers. This setup provides a resonant transmission of a low intensity light and nearly total reflectivity of a high-intensity light.

Makri used a power limiter consisting of a nonlinear lossy layer embedded in two mirror layers. This setup provides a resonant transmission of a low intensity light and nearly total reflectivity of a high-intensity light.

A study co-authored by Graduate Research Assistant Eleana Makri and two other Wesleyan researchers is a topic of a Oct. 20 article published in Scientific Reports.

Due to the ultrahigh-speed and ultrawide-band brought by adopting photons as information carriers, photonic integration has been a long-term pursuit for researchers, which can break the performance bottleneck incurred in modern semiconductor-based electronic integrated circuits. The article states that “recently, Makri theoretically proposed the concept of reflective power limiter based on nonlinear localized modes, where a nonlinear layer was sandwiched by two reflective mirrors, thus increased the device complexity.”

The report is based on Makri’s study, titled “Non-Linear Localized Modes Give Rise to a Reflective Optical Limiter” published in March 2014. The paper is co-authored by Tsampikos Kottos, the Douglas J. and Midge Bowen Bennet Associate Professor of Physics; Hamidreza Ramezani Ph.D. ’13 (now a postdoc at U.C. Berkeley) and Ilya Vitebskiy (Sensors Directorate at the Air Force Research Laboratory, Ohio).

The same study was also highlighted in Washington, D.C. at the spring review meeting of the Air Force Office of Scientific Research (AFOSR) as one of the main research achievements in electromagnetics of 2014 that can potentially benefit the U.S. Air Force. Read more about this study in this past News @ Wesleyan article.

Read the full Scientific Report article, titled “Chip-integrated optical power limiter based on an all-passive micro-ring resonator,” online here.

Kottos, Basiri Author Paper Published in Physical Review

Data by Tsampikos Kottos and Ali Basiri.

Tsampikos Kottos and Ali Basiri, a Ph.D. student in physics, are co-authors of a paper titled “Light localization induced by a random imaginary refractive index,” published in Physical Review A 90, on Oct. 13, 2014. Kottos is the Douglas J. and Midge Bowen Bennet Associate Professor of Physics.

In the paper, the authors show the emergence of light localization in arrays of coupled optical waveguides with randomness.

 

 

 

Hughes Finds Magnetic Fields in Stardust; Study Published in Nature

Assistant professor of Astronomy Meredith Hughes and eight colleagues have found evidence of magnetic fields in stardust – an indication that magnetic fields are important in the process of planetary system formation, according to a new paper in the journal Nature.

The discovery is another step in work by Hughes and other astronomers to understand how celestial bodies are formed. It is known that magnetic fields in the “accretion disks” of stars play a dominant role in the star formation process.

Meredith Hughes

Meredith Hughes

Using data from an observatory near Bishop, Calf., Hughes and her colleagues were able to spot signs of magnetic fields in the dust of the disk of a star about 300 light years away. While magnetic fields have been detected in regions that represent the very earliest stages of star formation (the so-called Class 0 and Class I stages), this is the first time they have been seen around a star with an older age closer to when we believe planetary systems form.

“This is an important result,” Hughes said. “It’s the first time that we’ve seen magnetic fields this late in the process of star and planet formation. And like any good scientific result, when you find something new it opens up whole new sets of questions we can ask.”

In fact, Hughes said the astronomers did not expect the results they got. “I honestly didn’t think it was going to work – we had been trying so long with Class II sources and hadn’t found anything,” she said. “But I thought, we might as well try this last source that is just a little younger than most Class II sources. You want to try everything you can – but it was really a surprise when it worked.”

The paper, “Spatially resolved magnetic field structure in the disk of a T Tauri star,” was published Oct. 22. Nature is the world’s most highly-cited interdisciplinary science publication. The 145-year-old journal is published weekly.

Math Ph.D. Candidate Smith Delivers First Graduate Speaker Series Talk

Brett Smith, a Ph.D. candidate in mathematics, spoke during the first Graduate Speaker Series event Oct. 7 in Exley Science Center. Smith's talk, titled "Mine, Yours and the Truth," focused on American mobster Joe Massino, boss of the Bonanno crime family in New York from 1991 until 2004. "Big Joey" famously said, “there are three sides to every story — mine, yours and the truth.”

Brett Smith, a Ph.D. candidate in mathematics, spoke during the first Graduate Speaker Series event Oct. 7 in Exley Science Center. More than 50 students, faculty and staff attended the event. Smith’s talk, titled “Mine, Yours and the Truth,” focused on American mobster Joe Massino, boss of the Bonanno crime family in New York from 1991 until 2004. “Big Joey” famously said, “there are three sides to every story — mine, yours and the truth.”

By using a graph theory called the Robertson–Seymour theorem, Smith explored the competing questions, "What is the best way to organize a mafia so that you won't be caught?" and "What is the best way to patrol a city to disrupt organized crime?" Smith explained how these questions are one and the same.

By using a graph theory called the Robertson–Seymour theorem, Smith explored the competing questions, “What is the best way to organize a mafia so that you won’t be caught?” and “What is the best way to patrol a city to disrupt organized crime?”
Smith explained how these questions are one and the same.

Three more graduate students will tentatively speak as part of the series this fall and next spring including Duminda Ranasinghe, a chemistry Ph.D. candidate; Katie Kaus, a molecular biology and biochemistry Ph.D. candidate and Peter Blasser, a graduate student in music. For more information, visit the Graduate Studies website.