Digital Commons Network^™

The Hamiltonian Approach To Yang-Mills (2 + 1): Expansion Scheme And Corrections To String Tension, Dimitra Karabali, V P. Nair, Alexandr Yelinkov

Publications and Research

We carry out further analysis of the Hamiltonian approach to Yang-Mills theory in 2+1 dimensions which helps to place the calculation of the vacuum wave function and the string tension in the context of a systematic expansion scheme. The solution of the Schrodinger equation is carried out recursively. The computation of correlators is re-expressed in terms of a two-dimensional chiral boson theory. The effective action for this theory is calculated to first order in our expansion scheme and to the fourth order in a kinematic expansion parameter. The resulting corrections to the string tension are shown to be very small, …

Core/Shell Nanoparticles As Hybrid Platforms For The Fabrication Of A Hydrogen Peroxide Biosensor, Yu-Ho Won, Doreen Aboagye, Ho Seong Jang, Andrei Jitianu, Lia A. Stanciu

Publications and Research

No abstract provided.

Interaction Of A Nanomagnet With A Weak Superconducting Link, Liufei Cai, Eugene M. Chudnovsky

Publications and Research

We study electromagnetic interaction of a nanomagnet with a weak superconducting link. Equations that govern coupled dynamics of the two systems are derived and investigated numerically. We show that the presence of a small magnet in the proximity of a weak link may be detected through Shapiro-like steps caused by the precession of the magnetic moment. Despite very weak magnetic field generated by the weak link, a time-dependent bias voltage applied to the link can initiate a non-linear dynamics of the nanomagnet that leads to the reversal of its magnetic moment. We also consider quantum problem in which a nanomagnet …

Rotational Doppler Effect In Magnetic Resonance, S Ledinez, Eugene M. Chudnovsky, Javier Tejada

Publications and Research

We compute the shift in the frequency of the spin resonance in a solid that rotates in the field of a circularly polarized electromagnetic wave. Electron spin resonance, nuclear magnetic resonance, and ferromagnetic resonance are considered. We show that contrary to the case of the rotating LC circuit, the shift in the frequency of the spin resonance has strong dependence on the symmetry of the receiver. The shift due to rotation occurs only when rotational symmetry is broken by the anisotropy of the gyromagnetic tensor, by the shape of the body, or by magnetocrystalline anisotropy. General expressions for the resonance …

Dipolar Ordering In Crystals Of Mn12 Ac, Dmitry A. Garanin

Publications and Research

Ordering in realistic elongated box-shape crystals of the molecular magnet Mn_12 Ac is investigated with the site-resolved mean-field approximation that does not assume a uniform ordering. It is shown that ferromagnetic ordering should not occur in crystals with the aspect ratio up to 12. Instead, for the aspect ratio about 6, the inner and outer regions of the crystal order in different directions, uniformly along its length. Finding ordering temperature by extrapolating the inverse susceptibility curve does not provide a correct T_C.

A Multivalent Dna Aptamer Specific For The B-Cell Receptor On Human Lymphoma And Leukemia, Prabodhika R. Mallikaratchy, Alessandro Ruggiero, Jeffrey R. Gardner, Vitaly Kuryavyi, William F. Maguire, Mark L. Heaney, Michael R. Mcdevitt, Dinshaw J. Patel, David A. Scheinberg

Publications and Research

Long-term survival still eludes most patients with leukemia and non-Hodgkin’s lymphoma. No approved therapies target the hallmark of the B cell, its mIgM, also known as the B-cell receptor (BCR). Aptamers are small oligonucleotides that can specifically bind to a wide range of target molecules and offer some advantages over antibodies as therapeutic agents. Here, we report the rational engineering of aptamer TD05 into multimeric forms reactive with the BCR that may be useful in biomedical applications. Systematic truncation of TD05 coupled with modification with locked nucleic acids (LNA) increased conformational stability and nuclease resistance. Trimeric and tetrameric versions with …

Arabic For Designers By Mourad Boutros, Saad D. Abulhab

Publications and Research

No abstract provided.

Acceptance, Communication Mode And Use Of Audio Computer- Assisted Self Interview Using Touchscreen To Identify Risk Factors Among Pregnant Minority Women, Jutta S. Thornberry, Kennan B. Murray, M. Nabil El-Khorazaty, Michele Kiely

Publications and Research

This paper evaluates the acceptability, communication mode and use of audio computer-assisted self-interview (A-CASI) among minority pregnant women receiving prenatal care in six Washington, DC sites. A total of 2,913 women were screened for demographic eligibility (18+ years old,gestation, Black/African-American or Hispanic) and risk (smoking, environmental tobacco smoke exposure, depression, intimate partner violence). Questions were displayed on touch screen laptop monitors and heard through earphones. The mean length of time to complete the screener was almost 6 minutes.

A-CASI experience, which included difficulty in using the computer, acceptability (enjoyment), and preferred communication mode, was compared across sites, the eligibility and …

Energy Of The Conduction Band In Near Critical Point Fluids, Cherice M. Evans, G. L. Findley

Publications and Research

The study of the evolution of the conduction band in dense gases and supercritical fluids near the critical point has been complicated by a lack of precise experimental measurements. Both photoemission from an electrode immersed in the fluid and field ionization of a molecule doped into the fluid have been used to probe solvent density effects on the energy of an excess electron as a function of fluid number density and temperature. In this perspective, we present recent experimental results that show a strong critical point effect on the minimumconduction band energy near the critical density and temperature of a …

Engagement At The Theater: Science In The Cinema, B. D. Stillion, John M. Pratte, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

The Invisible Enemy, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

Climate Control Of Terrestrial Carbon Exchange Across Biomes And Continents, Chuixiang Yi, Daniel Ricciuto, Runze Li, John Wolbeck, Xiyan Xu, Mats Nilsson, Luis Aires, John D. Albertson, Christof Ammann, M Altaf Arain, Alessandro C. De Araujo, Marc Aubinet, Mika Aurela, Zoltan Barcza, Alan Barr, Paul Berbigier, Jason Beringer, Christian Bernhofer, Andrew T. Black, Paul V. Bolstad, Fred C. Bosveld, Mark S J Broadmeadow, Nina Buchmann, Sean P. Burns, Pierre Cellier, Jingming Chen, Jiquan Chen, Philippe Ciais, Robert Clement, Bruce D. Cook, Peter S. Curtis, D Bryan Dail, Ebba Dellwik, Nicolas Delpierre, Ankur R. Desai, Sabina Dore, Danilo Dragoni, Bert G. Drake, Eric Dufrêne, Allison Dunn, Jan Elbers, Werner Eugster, Matthias Falk, Christian Feigenwinter, Lawrence B. Flanagan, Thomas Foken, John Frank, Juerg Fuhrer, Damiano Gianelle, Allen Goldstein, Mike Goulden, Andre Granier, Thomas Grünwald, Lianhong Gu, Haiqiang Guo, Albin Hammerle, Shijie Han, Niall P. Hanan, László Haszpra, Bernard Heinesch, Carole Helfter, Dimmie Hendriks, Lindsay B. Hutley, Andreas Ibrom, Cor Jacobs, Torbjörn Johansson, Marjan Jongen, Gabriel Katul, Gerard Kiely, Katja Klumpp, Alexander Knohl, Thomas Kolb, Werner L. Kutsch, Peter Lafleur, Tuomas Laurila, Ray Leuning, Anders Lindroth, Heping Liu, Benjamin Loubet, Giovanni Manca, Michal Marek, Hank A. Margolis, Timothy A. Martin, William J. Massman, Roser Matamala, Giorgio Matteucci, Harry Mccaughey, Lutz Merbold, Tilden Meyers, Mirco Migliavacca, Franco Miglietta, Laurent Misson, Meelis Mölder, John Moncrieff, Russell K. Monson, Leonardo Montagnani, Mario Montes-Helu, Eddy Moors, Christine Moureaux, Mukufute M. Mukelabai, J William Munger, May Myklebust, Zoltán Nagy, Asko Noormets, Walter Oechel, Ram Oren, Stephen G. Pallardy, Kyaw Tha Paw U, João S. Pereira, Kim Pilegaard, Krisztina Pintér, Casimiro Pio, Gabriel Pita, Thomas L. Powell, Serge Rambal, James T. Randerson, Celso Von Randow, Corinna Rebmann, Janne Rinne, Federica Rossi, Nigel Roulet, Ronald J. Ryel, Jorgen Sagerfors, Nobuko Saigusa, María José Sanz, Giuseppe-Scarascia Mugnozza, Hans Peter Schmid, Guenther Seufert, Mario Siqueira, Jean-François Soussana, Gregory Starr, Mark A. Sutton, John Tenhunen, Zoltán Tuba, Juha-Pekka Tuovinen, Riccardo Valentini, Christoph S. Vogel, Jingxin Wang, Shaoqiang Wang, Weiguo Wang, Lisa R. Welp, Xuefa Wen, Sonia Wharton, Matthew Wilkinson, Christopher A. Williams, Georg Wohlfahrt, Susumu Yamamoto, Guirui Yu, Roberto Zampedri, Bin Zhao, Xinquan Zhao

Publications and Research

No abstract provided.

A Multidimensional Strategy To Detect Polypharmacological Targets In The Absence Of Structural And Sequence Homology, Jacob D. Durrant, Rommie E. Amaro, Lei Xie, Michael D. Urbaniak, Michael A. J. Ferguson, Antti Haapalainen, Zhijun Chen, Anne Marie Di Guilmi, Frank Wunder, Philip E. Bourne, J. Andrew Mccammon

Publications and Research

Conventional drug design embraces the ‘‘one gene, one drug, one disease’’ philosophy. Polypharmacology, which focuses on multi-target drugs, has emerged as a new paradigm in drug discovery. The rational design of drugs that act via polypharmacological mechanisms can produce compounds that exhibit increased therapeutic potency and against which resistance is less likely to develop. Additionally, identifying multiple protein targets is also critical for side-effect prediction. One third of potential therapeutic compounds fail in clinical trials or are later removed from the market due to unacceptable side effects often caused by off-target binding. In the current work, we introduce a multidimensional …

Multiresolution Inverse Wavelet Reconstruction From A Fourier Partial Sum, Nataniel Greene

Publications and Research

The Gibbs phenomenon refers to the lack of uniform convergence which occurs in many orthogonal basis approximations to piecewise smooth functions. This lack of uniform convergence manifests itself in spurious oscillations near the points of discontinuity and a low order of convergence away from the discontinuities.In previous work [11,12] we described a numerical procedure for overcoming the Gibbs phenomenon called the Inverse Wavelet Reconstruction method (IWR). The method takes the Fourier coefficients of an oscillatory partial sum and uses them to construct the wavelet coefficients of a non-oscillatory wavelet series. However, we only described the method standard wavelet series and …

Nearest Neighbor Search With Strong Location Privacy, Stavros Papadopoulos, Spiridon Bakiras, Dimitris Papadias

Publications and Research

The tremendous growth of the Internet has significantly reduced the cost of obtaining and sharing information about individuals, raising many concerns about user privacy. Spatial queries pose an additional threat to privacy because the location of a query may be sufficient to reveal sensitive information about the querier. In this paper we focus on k nearest neighbor (kNN) queries and define the notion of strong location privacy, which renders a query indistinguishable from any location in the data space. We argue that previous work fails to support this property for arbitrary kNN search. Towards this end, we introduce methods that …

Guest Editorial: On Method, Technorealism And Aesthetic Capitalism, Patricia Ticineto Clough

Publications and Research

The guest editorial excerpts the keynote address Professor Clough held at the First Annual Graduate Student Conference hosted by the Graduate Center's Sociology Students Association.

Optimal Cryptographic Hardness Of Learning Monotone Functions, Dana Dachman-Soled, Homin K. Lee, Tal Malkin, Rocco A. Servedio, Andrew Wan, Hoeteck Wee

Publications and Research

Over the years a range of positive algorithmic results have been obtained for learning various classes of monotone Boolean functions from uniformly distributed random examples. Prior to our work, however, the only negative result for learning monotone functions in this model has been an information-theoretic lower bound showing that certain super-polynomial-size monotone circuits cannot be learned to accuracy 1/2+w(log n/ p n) (Blum, Burch, and Langford, FOCS’98). This is in contrast with the situation for nonmonotone functions, where a wide range of cryptographic hardness results establish that various “simple” classes of polynomial-size circuits are not learnable by polynomial-time algorithms.

In …

Correlating Molecular Phylogeny With Venom Apparatus Occurrence In Panamic Auger Snails (Terebridae), Mandë Holford, Nicolas Puillandre, Maria Vittoria Modica, Maren Watkins, Rachel Collin, Eldredge Bermingham, Baldomero M. Olivera

Publications and Research

Central to the discovery of neuroactive compounds produced by predatory marine snails of the superfamily Conoidea (cone snails, terebrids, and turrids) is identifying those species with a venom apparatus. Previous analyses of western Pacific terebrid specimens has shown that some Terebridae groups have secondarily lost their venom apparatus. In order to efficiently characterize terebrid toxins, it is essential to devise a key for identifying which species have a venom apparatus. The findings presented here integrate molecular phylogeny and the evolution of character traits to infer the presence or absence of the venom apparatus in the Terebridae. Using a combined dataset …

Pointcut Rejuvenation: Recovering Pointcut Expressions In Evolving Aspect-Oriented Software, Raffi Khatchadourian, Phil Greenwood, Awais Rashid, Guoqing Harry Xu

Publications and Research

Pointcut fragility is a well-documented problem in Aspect-Oriented Programming; changes to the base-code can lead to join points incorrectly falling in or out of the scope of pointcuts. We present an automated approach that limits fragility problems by providing mechanical assistance in pointcut maintenance. The approach is based on harnessing arbitrarily deep structural commonalities between program elements corresponding to join points selected by a pointcut. The extracted patterns are then applied to later versions to offer suggestions of new join points that may require inclusion. We demonstrate the usefulness of our technique by rejuvenating pointcuts in multiple versions of several …

The Accounting At A Tipping Point – Decline Or Renewal, Susan Haka

Publications and Research

No abstract provided.

Contributing Factors To Pointcut Fragility, Phil Greenwood, Awais Rashid, Raffi Khatchadourian

Publications and Research

Pointcut fragility is a well-documented problem of Aspect-Oriented Programming with changes to the base-code causing join points to incorrectly fall in or out of scope. In order to combat this problem a tool was developed that provides mechanical assistance to pointcut maintenance. This tool relied on the deep structural commonalities between program elements to detect when pointcut fragility occurs. During the assessment of this tool a number of common practices were uncovered that were employed both in the aspect and base-code that contributed to or prevented pointcut fragility. This paper documents the practices uncovered and describes how they can affect …

In Vivo Colocalisation Of Oskar Mrna And Trans-Acting Proteins Revealed By Quantitative Imaging Of The Drosophila Oocyte, Musa M. Mhlanga, Diana P. Bratu, Auguste Genovesio, Agata Rybarska, Nicolas Chenouard, Ulf Nehrbass, Jean-Christophe Olivo-Marin

Publications and Research

Efficient mRNA transport in eukaryotes requires highly orchestrated relationships between nuclear and cytoplasmic proteins. For oskar mRNA, the Drosophila posterior determinant, these spatio-temporal requirements remain opaque during its multi-step transport process. By in vivo covisualization of oskar mRNA with Staufen, its putative trafficking protein, we find oskar mRNA to be present in particles distinct from Staufen for part of its transport. oskar mRNA stably associated with Staufen near the posterior pole. We observe oskar mRNA to oligomerize as hundreds of copies forming large particles which are necessary for its long range transport and localization. We show the formation of these …

Teaching Mathematics For Social Justice: Reflections On A Community Of Practice For Urban High School Mathematics Teacher, Lidia Gonzalez

Publications and Research

In this article, the author reports on a study that explored, in part, the developing identities of seven New York City public high school mathematics teachers as teachers of mathematics and agents of change. Meeting regularly as a community of practice, the teachers and author/researcher discussed issues of teaching mathematics for social justice; explored activities and lessons around social justice; and created a unit of study that attempted to meet high school level mathematics standards, while addressing a social justice issue affecting the lives of urban students. The author reports on the mathematics teachers, growing awareness of and concerns about …

Journals Not Included In Biosis Have A Notable Impact In Biology, Philip Barnett, Claudia Lascar

Publications and Research

No abstract provided.

The Complexities Of Measuring Access To Parks And Physical Activity Sites In New York City: A Quantitative And Qualitative Approach, Andrew R. Maroko, Juliana A. Maantay, Nancy L. Sohler, Kristen L. Grady, Peter S. Arno

Publications and Research

Background Proximity to parks and physical activity sites has been linked to an increase in active behaviors, and positive impacts on health outcomes such as lower rates of cardiovascular disease, diabetes, and obesity. Since populations with a low socio-economic status as well as racial and ethnic minorities tend to experience worse health outcomes in the USA, access to parks and physical activity sites may be an environmental justice issue. Geographic Information systems were used to conduct quantitative and qualitative analyses of park accessibility in New York City, which included kernel density estimation, ordinary least squares (global) regression, geographically weighted (local) …

Information Literacy And Blind And Visually Impaired Students, Rebecca Schiff

Publications and Research

In the summer of 2007, as part of the City University of New York PeopleTech Summer Institute held at Baruch College, the author taught a class in information literacy to a group of blind and visually impaired students, using assistive technology to access the resources of the college library. Despite considerable preparation and experience, teaching the class presented unexpected difficulties, detailed in this paper. Rapid advances in information literacy technology present unusual challenges for the average student—challenges that are magnified when the intermediate assistive technology is itself not easy to master. The author explores the pertinent literature.

Quantum Computing: Selected Internet Resources For Librarians, Researchers, And The Casually Curious, Jill Cirasella

Publications and Research

This article is an annotated selection of the most important and informative Internet resources for learning about quantum computing, finding quantum computing literature, and tracking quantum computing news.

The Maximum Rectilinear Crossing Number Of The N Dimensional Cube Graph, Matthew Alpert, Elie Feder, Heiko Harborth, Sheldon Klein

Publications and Research

We find a.nd prove the maximum rectilinear crossing n1.1mber of the three-dimensional cube graph (Q₃). We demonstrate a method of drawing then-cube graph, Q_n., with many crossings, and thus find a lower bound for the maximum rectilinear crossing number of Q_n. We conjecture that this bound is sharp. We also prove an upper bound for the maximum rectilinear crossing number of Q_n.

Testimony Of Jeremy Travis, President Of John Jay College Of Criminal Justice, Before The U.S. House Of Representatives Committee On Appropriations, Subcommittee On Commerce, Justice, Science, And Related Agencies, On “What Works” For Successful Prisoner Reentry, Jeremy Travis

Publications and Research

No abstract provided.

Lip-Reading Aids Word Recognition Most In Moderate Noise: A Bayesian Explanation Using High-Dimensional Feature Space, Wei Ji Ma, Xiang Zhou, Lars A. Ross, John J. Foxe, Lucas C. Parra

Publications and Research

Watching a speaker's facial movements can dramatically enhance our ability to comprehend words, especially in noisy environments. From a general doctrine of combining information from different sensory modalities (the principle of inverse effectiveness), one would expect that the visual signals would be most effective at the highest levels of auditory noise. In contrast, we find, in accord with a recent paper, that visual information improves performance more at intermediate levels of auditory noise than at the highest levels, and we show that a novel visual stimulus containing only temporal information does the same. We present a Bayesian model of optimal …