Tag Archive for graduate students

Graduate Students Speak on Taiwanese Music at Ethnomusicology Meeting

Pictured at the Society for Ethnomusicology's Annual Meeting are, from left, Wesleyan's Ender Terwilliger, Po-wei Weng, Joy Lu and Su Zheng.v

Pictured at the Society for Ethnomusicology’s Annual Meeting are, from left, Wesleyan’s Ender Terwilliger, Po-wei Weng, Joy Lu and Su Zheng.

During the 2014 Society for Ethnomusicology’s 59th Annual Meeting, held Nov. 13-16 in Pittsburgh, Pa., Wesleyan graduate students collaborated to present the first panel dedicated to Taiwanese identity and music.

The panel, titled “How Taiwanese Should I Be? Contesting Taiwanese Identities in Local, Regional and Global Contexts,” comprised of Ph.D. candidates Joy Lu and Po-wei Weng, and graduate student Ender Terwilliger.

Su Zheng, associate professor of music, chaired the panel.

Covering Taiwanese opera, Pili Budaixi, and fusion performances, the panel explored the process of identity formation when promoting Taiwanese identity in politically delicate situations domestically and overseas.

In addition, Ph.D. candidates Dustin Wiebe, Min Yang and Fugan Dineen presented papers at the conference.

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.

 

 

 

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.

Naegele, Aaron, Student Researchers Published in Journal of Neuroscience

Jan Naegele, Gloster Aaron and several Wesleyan researchers are the co-authors of an article titled “Long-Term Seizure Suppression and Optogenetic Analyses of Synaptic Connectivity in Epileptic Mice with Hippocampal Grafts of GABAergic Interneurons,” published in the October 2014 edition of The Journal of Neuroscience, Issue 34(40): 13492-13504.

Naegele is professor of biology, professor of neuroscience and behavior, and director of the Center for Faculty Career Development. Aaron is associate professor of biology, associate professor of neuroscience and behavior. The article is co-authored by Diana Lin ’15; graduate students Jyoti Gupta and Meghan Van Zandt; recent alumni Elizabeth Litvina BA/MA ’11, XiaoTing Zheng ’14, Nicholas Woods ’13 and Ethan Grund ’13; and former research assistants/lab managers Sara Royston, Katharine Henderson and Stephanie Tagliatela.

Studies in rodent epilepsy models suggest that GABAergic interneuron progenitor grafts can reduce hyperexcitability and seizures in temporal lobe epilepsy (TLE). Although integration of the transplanted cells has been proposed as the underlying mechanism for these disease-modifying effects, prior studies have not explicitly examined cell types and synaptic mechanisms for long-term seizure suppression. To address this gap, the researchers transplanted medial ganglionic eminence (MGE) cells from embryos into adult mice two weeks after induction of TLE.

The researchers found that TLE mice with bilateral MGE cell grafts had significantly fewer and milder electrographic seizures. These findings suggest that fetal GABAergic interneuron grafts may suppress pharmacoresistant seizures.

 

Grad Student Herman, Sultan Published in Evolution, Faculty 1000

Jacob Herman

Jacob Herman

Biology Ph.D. candidate Jacob Herman and Sonia Sultan, chair and professor of biology, professor of environmental studies, are the co-authors of an article titled “How stable ‘should’ epigenetic modifications be? Insights from adaptive plasticity and bet hedging,” published in Evolution, Issue 68(3), pages 632-43. Herman was the Private Investigator on the paper.

The article also was selected by Faculty 1000, a platform for life scientists that helps scientists to discover, discuss and publish research.

Sonia Sultan

Sonia Sultan

Epigenetics is the study of ways chemical reactions change the way an organism grows and develops, and the factors that influence them. Epigenetic modifications can be stable across the individual’s lifespan and in some species even persist across generations, or they can be reversible, but it is currently unclear how the persistence of epigenetic modifications may evolve. In this paper, Herman and Sultan provide insights from the theoretical advances in adaptive phenotypic plasticity to predict the conditions that would favor the evolution of stable versus reversible epigenetic modification as an adaptive environmental response both within and across generations.

At Wesleyan, Herman is interested in the evolutionary implications of developmental plasticity. In particular, he has been studying transgenerational plasticity, a phenomenon that occurs when environments experienced by parents (or even more remote generations) influence the phenotypes of offspring, without changing the DNA sequence.

“There is a growing body of research in both plants and animals that suggests that transgenerational plasticity can have important ecological and evolutionary impacts, including influences on response to selection and population persistence in stressful environments,” he said.

Polygonum persicaria

Polygonum persicaria

Herman’s doctoral research focused on adaptive seedling responses to grandparental and parental drought stress in the widespread, introduced plant Polygonum persicaria.

“We found that functionally appropriate responses to drought stress persist across at least two generations in this species. These adaptive effects enhanced the growth and survival of ‘grandchild’ seedling offspring grown in drought conditions,” he said.

Herman’s research is one part of the larger effort in the Sultan lab to understand how individual plants respond to key environmental stresses, such as drought, and how those responses influence species’ ecology and evolution.

Learn more about ongoing research in the Sultan Lab here.

Ishiguro to Study Female Saman Dance as Fulbright DDRA Fellow

Maho Ishiguro

Maho Ishiguro

Maho Ishiguro, an ethnomusicology doctoral student, received a Fulbright Hays Doctoral Dissertation Research Abroad (DDRA) Fellowship to study the female Saman dance in Indonesia. The award came with a $29,508 stipend.

Ishiguro’s proposed research title is “Saman Dance in Diaspora Presence of Female Saman Dance as Expressions of Piety Cultural Identity and Popular Culture.” Her DDRA project will examine the contemporary life of female Saman dance in Jakarta, Yogyakarta and Banda Aceh.

Saman dance, or the dance of a “thousand hands” is typically performed in Gayo Lues, a mountainous region of Aceh, by eight to 20 male performers who kneel in a row and make different kinds of torso movements accompanied by songs, clapping hands, slapping chests or slapping the floor. The dance traditionally is performed to celebrate the birthday of Prophet Muhammad and has been used recently to promote Acehnese as well as Indonesia’s national culture.

“Indonesia’s deepening Islamization today impacts the nations’ performing arts and the conduct of Muslim women’s lives,” Ishiguro said. “In Aceh, despite its Islamic origin, female adults were prohibited from performing Saman dance at public events.

Wesleyan Welcomes 64 Graduate Students

Graduate Student Services welcomed 64 graduate students to Wesleyan on Aug. 26.

Of the students, 19 are part of Wesleyan’s BA/MA program; 12 are MA students; 20 are Ph.D. candidates; eight are Foreign Language Teaching Assistants; three are Wesleyan Writing Fellows and one is an exchange student from Germany.

Twelve are studying music and ethnomusicology; 37 are pursing degrees in science and mathematics; three are studying psychology and 12 are non-degree seeking students.

Of the 64 graduate students, 43 are from the United States. The other 21 are from France, Ghana, India, Greece, Spain, Mexico, Sri Lanka, Singapore, United Kingdom, Argentina, Italy, Japan, the Bahamas, Germany, China, Nepal and Morocco.

During Graduate Student Orientation, which began on Aug. 26, students toured Wesleyan’s Science Library and Olin Library, where music students were introduced to the Music library. They also attended panels and talks on Life at Wesleyan, Wellness at Wesleyan, lab safety training, graduate pedagogy and honor codes.

Students met with several Wesleyan faculty, staff and students including Mark Hovey, director of graduate studies, professor of mathematics; and Cheryl-Ann Hagner, director of Graduate Student Services; Antonio Farias, vice president for equity and inclusion; Mike Whaley, vice president for student affairs and others.

Pictured below are photos of the graduate student welcome picnic, held Aug. 26 behind Exley Science Center: (Photos by Olivia Drake)

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Graduate Students, Faculty Attend American Chemical Society Meeting

Chemistry graduate student Duminda Ranasinghe spoke about his research on "Density functional for core-valence correlation energy."

Chemistry graduate student Duminda Ranasinghe spoke about his research on “Density functional for core-valence correlation energy.”

Two graduate students and two faculty attended the 248th national meeting of the American Chemical Society Aug. 10-14 in San Francisco, Calif.

Chemistry graduate students Duminda Ranasinghe delivered a poster presentation on her research titled “Efficient extrapolation to the (T)/CBS limit” and an oral presentation on “Density functional for core-valence correlation energy.”

"Assessing weak interactions in small dimer systems with PM7."

Chemistry graduate student Kyle Throssell presented a poster titled “Assessing weak interactions in small dimer systems with PM7.”

Chemistry graduate student Kyle Throssell presented two poster presentations on “Potential curves of selected radical thiol double additions to alkynes” and “Assessing weak interactions in small dimer systems with PM7.”

The students were accompanied by George Petersson, the Fisk Professor of Natural Science, professor of chemistry; and Michael Frisch, research professor in chemistry.

Ph.D. Candidate Marino Attends Workshop on Computational Number Theory

Mathematics Ph.D. candidate Alicia Marino, pictured top, left, joined 11 other women studying mathematics and computer science for a four-day workshop this summer.

Mathematics Ph.D. candidate Alicia Marino, pictured top, left, joined 11 other women studying mathematics and computer science at a four-day workshop this summer.

Mathematics Ph.D. candidate Alicia Marino recently attended a four-day workshop in Portland, Ore. studying various aspects of computational number theory. The workshop focused on Sage, a mathematics software package, developed by and for the mathematical community.

The event included talks, tutorials, and time spent in small project groups developing Sage code. Participants worked to enhance the Sage library and discussed ways to increase the number of women in Sage development. The workshop ran July 28-Aug. 1.

Alicia Marino works on coding at the Sage workshop. 

Alicia Marino works on coding at the Sage workshop.

Marino, who holds a bachelor’s degree in computer science, attended the conference to sharpen her programming skills.

“My initial desire to attend the workshop was to throw myself back into that kind of an environment,” she said. “With the knowledge I gained at the workshop, I can continue to develop Sage on my own relative to what I do at Wesleyan.”

Marino learned about the workshop from event organizer Anna Haensch, who earned a Ph.D. in mathematics from Wesleyan in 2013. Haensch is now on the faculty at Duquesne University.

Professor of Mathematics Wai Kiu “Billy” Chan served as advisor to Marino and Haensch.

“It was definitely an empowering experience to spend a week in a beautiful environment with intelligent women dedicating our time to a merge of math and computer science,” Marino said.

Grad Student’s Graphic to Appear on Journal’s Cover

Katherine Kaus's story and figure will appear in the September 2014 Journal of Molecular Biology. The figure depicts the structure of a domain of the Vibrio vulnificus hemolysin that binds cell-surface glycans allowing the toxin to attack target cells. The structure was determined using a technique called X-ray crystallography.

Katherine Kaus’s figure, based on an article she co-authored, will appear on the cover of the Sept. 9 Journal of Molecular Biology. The figure depicts the structure of a domain of the Vibrio vulnificus hemolysin that binds cell-surface glycans allowing the toxin to attack target cells. The structure was determined using a technique called X-ray crystallography.

A figure created by Katherine Kaus, graduate student in the Molecular Biology and Biochemistry Department, was selected to run as the featured cover graphic in the Sept. 9 Journal of Molecular Biology.

The graphic is related to her article, titled “Glycan Specificity of the Vibrio vulnificus Hemolysin Lectin Outlines Evolutionary History of Membrane Targeting by a Toxin Family,” which was published in the journal on July 29. It is co-authored by Rich Olson, assistant professor of molecular biology and biochemistry, and researchers at the University of Connecticut. The abstract appears online here.

Vibrio vulnificus is an emerging human pathogen that causes severe food poisoning and opportunistic infections with a mortality rate exceeding 50 percent.

The aquatic pathogen secretes a pore-forming toxin (PFT) called V. vulnificus hemolysin (VVH) which form transmembrane channels in cellular membranes. “Determining the mechanism for how PFTs bind membranes is important in understanding their role in disease and for developing possible ways to block their action,” Kaus explained in the paper’s abstract. Sequence analysis in light of the authors structural and functional data suggests that V. vulnificus hemolysin may represent an earlier step in the evolution of Vibrio PFTs.

Arulanantham Honored with Chambliss Medal at American Astronomical Society Meeting

Astronomy graduate student Nicole Arulanantham received the Chambliss Medal by the American Astronomical Society.

Astronomy graduate student Nicole Arulanantham received the Chambliss Medal by the American Astronomical Society.

Nicole Arulanantham, who is entering her second year as a graduate student in the Astronomy MA program, was awarded a Chambliss Medal by the American Astronomical Society at its June 3 meeting in Boston. The awards are given to recognize exemplary research by a student presenting a poster paper at an AAS meeting.

Arulanantham worked on the study with her advisor, Bill Herbst, the John Monroe Van Vleck Professor of Astronomy, chair of the Astronomy Department, and Ann Marie Cody of the California Institute of Technology. It involved analysis of data obtained with the Spitzer Space Telescope. Read more about the study online here.

Astronomy major Ben Tweed ’13 also presented a paper at the AAS meeting and reported results of his study of the local interstellar medium using data from the Hubble Space Telescope. His advisor is Seth Redfield, assistant professor of astronomy, and the work was done in collaboration with astronomers at the Universities of Warwick and Kiel, as well as University College London. Read more about the study online here.