Digital Commons Network^™

The Collegian (2007-01-29), Isis Lopez

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 59, No. 17

The Collegian (2007-01-22), Isis Lopez

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 59, No. 16

Utb-Tsc Academic Senate Minutes 2007-01-19, University Of Texas At Brownsville And Texas Southmost College. Faculty Senate.

UTB/TSC Faculty Senate Minutes

No abstract provided.

The Collegian (2007-01-15), Isis Lopez

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 59, No. 15

Utb/Tsc Graduate Catalog 2007-2009, University Of Texas At Brownsville, Texas Southmost College

UTB/TSC Archives - Course Catalogs

No abstract provided.

Collection Of Works By Faculty And Staff - 2007, University Of Texas At Brownsville

Digital Books

This annual publication provides a listing of books, journals, videocassettes, compact discs, and software produced by various faculty and staff of the former University of Texas at Brownsville.

Panorama 2007, Daniel Flores

UTPA Archives - Panorama Magazine

No abstract provided.

Orange & White - Winter 2007, University Of Texas At Brownsville, Texas Southmost College

UTB/TSC Archives - Orange & White Magazine

No abstract provided.

Orange & White - Winter 2007, University Of Texas At Brownsville, Texas Southmost College

UTB/TSC Archives - Orange & White Magazine

No abstract provided.

Utpa Undergraduate Catalog 2007-2009, University Of Texas Pan American

UTPA Archives - Course Catalogs

No abstract provided.

Utb/Tsc Undergraduate Catalog 2007-2008, University Of Texas At Brownsville, Texas Southmost College

UTB/TSC Archives - Course Catalogs

No abstract provided.

Utpa Graduate Catalog 2007-2009, University Of Texas Pan American

UTPA Archives - Course Catalogs

No abstract provided.

Utb/Tsc Student Handbook 2007-2008, University Of Texas At Brownsville, Texas Southmost College

Student Handbooks (UTB/UTPA)

No abstract provided.

Katrina, Rita, Challenger And Columbia: Operationalizing A Knowledge Analytic In Nasa And Dhs Crises, Terence Garrett

Political Science Faculty Publications

The knowledge analytic is based on the reality of organizations that are clearly defined by the people who inhabit them: executives, managers, and workers. Each level of the organization possesses people who have a way of knowing how to do their work. Problems in organizations arise when there is conflict, or incompatibility, of knowledges (plural). Hummel (2006) submits that those at the higher echelons of the organization, the executives, use numbers as power over subordinates. Problems are accentuated with the problem of “forced commensurability” where numbers become more real to the organization than the actual work experienced by the employees …

Young Latino Students' Learning In Problem-Based Reform Mathematics Classrooms: Developing Mathematical Thinking And Communication, Mary Marshall, Sandra I. Musanti, Sylvia Celedón-Pattichis

Bilingual and Literacy Studies Faculty Publications

This study explores how Latino first grade students develop mathematical problem solving and communication in their native language. Problem types came from Cognitively Guided Instruction (Carpenter et al. 1999) and were embedded in students’ cultural and linguisticexperiences. Findings show students solved a wide range of CGI problems and developed confidence, flexibility, and sophistication in their strategies and explanations.

Standards-Based Mathematics Curriculum And Hispanic Middle School Students’ Attitudes And Classroom Experiences, James A. Telese

Teaching and Learning Faculty Publications

Sixth-grade, Mexican American, middle school students completed a survey which gauged attitudes toward mathematics and the frequency of traditional and nontraditional classroom activities, following the implementation of a standardsbased curriculum. Analysis of variance procedures were conducted using Gender, Ethnicity, and School as main factors. The results indicated that on average students held favorable attitudes toward mathematics, and they experienced primarily nontraditional classroom activities. There was a significant gain in achievement scores as measured by the Texas Assessment of Knowledge and Skills test. The implications are that a standards-based curriculum promotes favorable attitudes in middle school mathematics students and encourages teachers …

Solving Ramanujan's Differential Equations For Eisenstein Series Via A First Order Riccati Equation, James M. Hill, Bruce C. Berndt, Timothy Huber

School of Mathematical & Statistical Sciences Faculty Publications

In this paper we prove that Ramanujan's differential equations for the Eisenstein series P, Q, and R are invariant under a simple one-parameter stretching group of transformations. Using this, we show that the three differential equations may be reduced to a first order Riccati differential equation, the solution of which may be represented in terms of hypergeometric functions. The resulting formulas allow for the derivation of parametric representations of P, Q, and R, analogous to representations in Ramanujan's second notebook. In contrast, in the classical approach, one first needs to derive the fundamental formula connecting theta functions with elliptic integrals. …

Trampling, Peeling And Nibbling Mussels: An Experimental Assessment Of Mechanical And Predatory Damage To Shells Of Mytilus Trossulus (Mollusca: Mytilidae), Carlos E. Cintra-Buenrostro

School of Earth, Environmental, & Marine Sciences Faculty Publications

Shell damage, if properly recognized, can provide information about biotic interactions between molluscs and their predators. However, it can be difficult to distinguish predatory damage from mechanical breakage, thus making interpretation of damaged modern and fossil shells problematic. To establish a clear-cut distinction between antemortem predatory crab damage and ante- and postmortem mechanical damage in Mytilus trossulus shells, a combined field and experimental approach was used. Mussels were exposed to predation by crabs, tumbled-live, tumbled-dead, and trampled. After 100 h of tumbling, live-collected mussel shells were abraded and disarticulated but not otherwise damaged. Eight percent of the dead-collected shells were …

Single Dna Conformations And Biological Function, Ralf Metzler, Tobias Ambjoernsson, Andreas Hanke, Yongli Zhang, Stephen Levene

Physics & Astronomy Faculty Publications

From a nanoscience perspective, cellular processes and their reduced in vitro imitations provide extraordinary examples for highly robust few or single molecule reaction pathways. A prime example are biochemical reactions involving DNA molecules, and the coupling of these reactions to the physical conformations of DNA. In this review, we summarise recent results on the following phenomena: We investigate the biophysical properties of DNA-looping and the equilibrium configurations of DNA-knots, whose relevance to biological processes are increasingly appreciated. We discuss how random DNA-looping may be related to the efficiency of the target search process of proteins for their specific binding site …

Spin Flips And Precession In Black-Hole-Binary Mergers, Manuela Campanelli, Carlos O. Lousto, Z. Zlochower, Badri Krishnan, David Merritt

Physics & Astronomy Faculty Publications

We use the “moving puncture” approach to perform fully nonlinear evolutions of spinning quasicircular black-hole binaries with individual spins unaligned with the orbital angular momentum. We evolve configurations with the individual spins (parallel and equal in magnitude) pointing in the orbital plane and 45° above the orbital plane. We introduce a technique to measure the spin direction and track the precession of the spin during the merger, as well as measure the spin flip in the remnant horizon. The former configuration completes 1.75 orbits before merging, with the spin precessing by 98° and the final remnant horizon spin flipped by …

Searches For Periodic Gravitational Waves From Unknown Isolated Sources And Scorpius X-1: Results From The Second Ligo Science Run, B. P. Abbott, R. Abbott, Mario C. Diaz, R. Grosso, Wm. R. Johnston, Soumya Mohanty, Soma Mukherjee, Cristina V. Torres

Physics & Astronomy Faculty Publications

We carry out two searches for periodic gravitational waves using the most sensitive few hours of data from the second LIGO science run. Both searches exploit fully coherent matched filtering and cover wide areas of parameter space, an innovation over previous analyses which requires considerable algorithm development and computational power. The first search is targeted at isolated, previously unknown neutron stars, covers the entire sky in the frequency band 160–728.8 Hz, and assumes a frequency derivative of less than 4×10−10  Hz/s. The second search targets the accreting neutron star in the low-mass x-ray binary Scorpius X-1 and covers the frequency …

Electromagnetic Strong Plasma Turbulence, A. Melatos, F. A. Jenet, P. A. Robinson

Physics & Astronomy Faculty Publications

The first large-scale simulations of continuously driven, two-dimensional electromagnetic strong plasma turbulence are performed, for electron thermal speeds 0.01c⩽v⩽0.57c, by integrating the Zakharov equations for coupled Langmuir and transverse (T) waves near the plasma frequency. Turbulence scalings and wave number spectra are calculated, a transition is found from a mix of trapped and free T eigenstates for v⩾0.1c to just free eigenstates for v⩽0.1c, and wave energy densities are observed to undergo slow quasiperiodic oscillations.

First Cross-Correlation Analysis Of Interferometric And Resonant-Bar Gravitational-Wave Data For Stochastic Backgrounds, B. P. Abbott, R. Abbott, Mario C. Diaz, R. Grosso, Soumya Mohanty, Soma Mukherjee, Cristina V. Torres

Physics & Astronomy Faculty Publications

Data from the LIGO Livingston interferometer and the ALLEGRO resonant-bar detector, taken during LIGO’s fourth science run, were examined for cross correlations indicative of a stochastic gravitational-wave background in the frequency range 850–950 Hz, with most of the sensitivity arising between 905 and 925 Hz. ALLEGRO was operated in three different orientations during the experiment to modulate the relative sign of gravitational-wave and environmental correlations. No statistically significant correlations were seen in any of the orientations, and the results were used to set a Bayesian 90% confidence level upper limit of Ωgw(f)≤1.02, which corresponds to a gravitational-wave strain at 915 …

N-(4-Methylphenyl) Benzenepropanamide - The First Isolated Amide From The Genus Paederia, Debasish Bandyopadhyay, Anupam Nayak, Bidyut Basak, Avijit Banerji, Julie Banerji, Asima Chatterjee, Thierry Prang, Alain Neuman

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

Investigation of the stem of Paederia foetida (Rubiaceae) resulted in the isolation and characterization of N-(4-methylphenyl)-benzopropanamide, which was hitherto unknown as a natural product This is the first report of an amide for the genus Paederia.

Upper Bounds On The Low-Frequency Stochastic Gravitational Wave Background From Pulsar Timing Observations: Current Limits And Future Prospects, Fredrick Jenet, G. B. Hobbs, W. Van Straten, R. N. Manchester, M. Bailes, J. P.W. Verbiest, R. T. Edwards, A. W. Hotan, J. M. Sarkissian, S. M. Ord

Physics & Astronomy Faculty Publications

Using a statistically rigorous analysis method, we place limits on the existence of an isotropic stochastic gravitational wave background using pulsar timing observations. We consider backgrounds whose characteristic strain spectra may be described as a power-law dependence with frequency. Such backgrounds include an astrophysical background produced by coalescing supermassive black-hole binary systems and cosmological backgrounds due to relic gravitational waves and cosmic strings. Using the best available data, we obtain an upper limit on the energy density per unit logarithmic frequency interval of ΩgSMBH[1/(8 yr)}h2 ≤ 1.9 × 10-8 for an astrophysical background that is 5 times more stringent than …

On The Use Of Modis Evi To Assess Gross Primary Productivity Of North American Ecosystems, Daniel A. Sims, Abdullah Rahman, Vicente D. Cordova, Bassil Z. El-Masri, Dennis D. Baldocchi, Lawrence B. Flanagan, Allen H. Goldstein, David Y. Hollinger, Laurent Misson, Russell K. Monson, Walter C. Oechel, Hans P. Schmid, Steven C. Wofsy, Liukang Xu

School of Earth, Environmental, & Marine Sciences Faculty Publications

[1] Carbon flux models based on light use efficiency (LUE), such as the MOD17 algorithm, have proved difficult to parameterize because of uncertainties in the LUE term, which is usually estimated from meteorological variables available only at large spatial scales. In search of simpler models based entirely on remote‐sensing data, we examined direct relationships between the enhanced vegetation index (EVI) and gross primary productivity (GPP) measured at nine eddy covariance flux tower sites across North America. When data from the winter period of inactive photosynthesis were excluded, the overall relationship between EVI and tower GPP was better than that between …

“Let Every One Of Us Take His Gun And Put Himself In The Ranks”: The Louisiana Native Guard's Defiance Of Antebellum Ideas Of Gender And Race, 1861–1863, Jeremy B. Taylor

Theses and Dissertations - UTB/UTPA

The Louisiana Native Guards are an appropriate topic for the study of the relationship between gender and race in Civil War era America. After Louisiana seceded in 1861, free men of color from New Orleans began an odyssey that led them to fight on both sides of the conflict. They eventually became the first black regiment mustered into the United States military and the only one to have black officers.

This study will attempt to demonstrate how the men of the Louisiana Native Guard helped redefine the nineteenth century ideas of manliness. Through their soldiering these men demonstrated qualities associated …

Observation Of Fano Asymmetry In Raman Spectra Of Srtio3 And Cax Sr1-Xtio3 Perovskite Nanocubes, Sarbajit Banerjee, Dae In Kim, Richard D. Robinson, Irving P. Herman, Yuanbing Mao, Stanislaus S. Wong

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

Bulk SrTi O3 is cubic and not expected to exhibit any first-order Raman scattering. However, nanocubes of SrTi O3 with an edge length of 80±10 nm show strong first-order Raman scattering originating from the breaking of symmetry caused by frozen surface dipoles (local tetragonality) and the presence of nanoscopic polar domains (arising from incorporated impurities). Rapid polarization fluctuations within these nanoscopic ferroelectric regions interfere with a polar phonon, resulting in a Fano-like asymmetric line shape in these SrTi O3 nanocubes, as well as in Ca0.3 Sr0.7 Ti O3 nanocubes.

The Collegian (2006-11-27), Isis Lopez

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 59, No. 14

A New Integrable Equation With Cuspons And W/M-Shape-Peaks Solitons, Zhijun Qiao

School of Mathematical & Statistical Sciences Faculty Publications

In this paper, we propose a new completely integrable wave equation: mt+mx u2 −ux 2 +2m2ux=0, m=u−uxx. The equation is derived from the two dimensional Euler equation and is proven to have Lax pair and bi-Hamiltonian structures. This equation possesses new cusp solitons—cuspons, instead of regular peakons ce− −ct with speed c. Through investigating the equation, we develop a new kind of soliton solutions—“W/M”-shape-peaks solitons. There exist no smooth solitons for this integrable water wave equation.