Entire DC Network | Open Access Articles | Digital Commons Network™

The Collegian (2009-10-12), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 62, No. 8

Go to article

The Collegian (2009-10-05), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 62, No. 7

Go to article

Los Arcos - Fall 2009, University Of Texas-Pan American

UTPA Archives - Los Arcos Magazine

No abstract provided.

Go to article

Utpa Stats At A Glance - Fall 2009, University Of Texas-Pan American

UTPA Archives - Stats At A Glance

No abstract provided.

Go to article

An Expeditious Synthesis Of 3-Amino B-Lactams Derived From Polyaromatic Compounds, Gildardo Rivera, Debasish Bandyopadhyay, Sonam Jaggi, R. Christopher Gonzales, Bimal K. Banik

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

A simple an effective method for the synthesis of a few trans 3-amino B-lactams derived from polyaromatic compounds has been accomplished via the deprotection of phthalimido groups with ethylene diamine.

Go to article

Indicadores Funcionales Y Estructurales Para Evaluar El Estado De Conservación De Humedales Costeros En El Sur De Tamaulipas, Alejandro Fierro-Cabo

School of Earth, Environmental, & Marine Sciences Faculty Publications

El manejo adecuado de las zonas costeras requiere de herramientas que permitan detectar procesos degradantes en los ecosistemas estratégicos prestadores de servicios ambientales. Los indicadores ecológicos responden adecuadamente a esta necesidad en humedales costeros. Se estudiaron ocho humedales de origen y características distintas, con afectaciones contrastantes conocidas. Se seleccionaron los indicadores que mejor discriminaron los sitios y se utilizaron para evaluar la evolución del estado de conservación de los mismos. La correspondencia ecológica entre indicadores funcionales y estructurales no se confirmó en todos los casos, por lo que es necesario utilizar ambos tipos para obtener un mejor diagnóstico. En dicha …

Go to article

Subcellular Min Oscillations As A Single-Cell Reporter Of The Action Of Polycations Protamine And Gentamicin On Escherichia Coli, Benjamin P.B. Downing, Andrew D. Rutenberg, Ahmed Touhami, Manfred Jericho

Physics & Astronomy Faculty Publications

Background: In Escherichia coli, MinD-GFP fusion proteins show rapid pole to pole oscillations. The objective was to investigate the effects of extracellular cations on the subcellular oscillation of cytoplasmic MinD within Escherichia coli. Methodology/Principal Findings: We exposed bacteria to the extracellular cations Ca++, Mg++, the cationic antimicrobial peptide (CAP) protamine, and the cationic aminoglycoside gentamicin. We found rapid and substantial increases in the average MinD oscillation periods in the presence of any of these polyvalent cations. For Ca++ and Mg++ the increases in period were transient, even with a constant extracellular concentration, while increases in period for protamine or gentamicin …

Go to article

The Pan American (2009-09-24), Brian Silva

UTPA Archives - The Pan American Newspaper

Vol. 66, No. 4

Go to article

First Ligo Search For Gravitational Wave Bursts From Cosmic (Super)Strings, B. P. Abbott, R. Abbott, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, R. Grosso, K. Hayama, H. Lei, Soumya Mohanty, Soma Mukherjee, Malik Rakhmanov, Joseph D. Romano, Robert Stone

Physics & Astronomy Faculty Publications

We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No gravitational waves were detected in 14.9 days of data from times when all three LIGO detectors were operating. We interpret the result in terms of a frequentist upper limit on the rate of gravitational wave bursts and use the limits on the rate to constrain the parameter space (string tension, reconnection probability, and loop sizes) of cosmic string models. Many grand unified theory-scale models (with string tension ��⁢��/��2≈10−6) …

Go to article

The Collegian (2009-09-21), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 62, No. 5

Go to article

The Collegian (2009-09-07), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 62, No. 3

Go to article

A Search For Periodic Gravitational Waves From Three Recycled Pulsars Using The Auriga Detector, A. Mion, M. J. Benacquista, M. Kramer, P. P.C. Freire, A. Possenti

Physics & Astronomy Faculty Publications

Aims.We report on a search for continuous gravitational wave emission from three recycled radio pulsars, performed by using the data of the resonant detector AURIGA. Given the spin rate of the selected targets - the isolated pulsar PSR J1939+2134 and the binary pulsars PSR J0024-7204J and PSR J0218+4232 - the expected frequency of the emitted gravitational waves falls in the high sensitivity range of the detector. Methods.The main topic is the method, meaning that the statistical analysis is performed by implementing a slightly modified version of the Feldman and Cousins Unified Approach. Results.By using ephemerides provided by suitable radio observations …

Go to article

Search For Gravitational Wave Ringdowns From Perturbed Black Holes In Ligo S4 Data, B. P. Abbott, R. Abbott, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, R. Grosso, K. Hayama, Soumya Mohanty, Soma Mukherjee, Malik Rakhmanov, Joseph D. Romano, Robert Stone, Lappoon R. Tang

Physics & Astronomy Faculty Publications

According to general relativity a perturbed black hole will settle to a stationary configuration by the emission of gravitational radiation. Such a perturbation will occur, for example, in the coalescence of a black hole binary, following their inspiral and subsequent merger. At late times the waveform is a superposition of quasinormal modes, which we refer to as the ringdown. The dominant mode is expected to be the fundamental mode, l=m=2. Since this is a well-known waveform, matched filtering can be implemented to search for this signal using LIGO data. We present a search for gravitational waves from black hole ringdowns …

Go to article

The Pan American (2009-08-31), Brian Silva

UTPA Archives - The Pan American Newspaper

Vol. 66, No. 1

Go to article

The Collegian (2009-08-31), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 62, No. 2

Go to article

The Collegian (2009-08-24), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 62, No. 1

Go to article

Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, Teviet Creighton, Matthew Benacquista, Mario C. Diaz, Soma Mukherjee, Soumya D. Mohanty, Malik Rakhmanov, Joseph D. Romano

Physics & Astronomy Faculty Publications

This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the fifth LIGO science run (S5). The data were searched for quasimonochromatic waves with frequencies f in the range from 50 to 1500 Hz, with a linear frequency drift á¸Ÿ (measured at the solar system barycenter) in the range -f/Ï„<á¸Ÿ<0.1f/Ï„, for a minimum spin-down age Ï„ of 1000 years for signals below 400 Hz and 8000 years above 400 Hz. The main computational work of the search was distributed over approximately 100000 computers volunteered by the general public. This large computing power allowed the use of a relatively long coherent integration time of 30 hours while searching a large parameter space. This search extends Einstein@Home's previous search in LIGO S4 data to about 3 times better sensitivity. No statistically significant signals were found. In the 125-225 Hz band, more than 90% of sources with dimensionless gravitational-wave strain tensor amplitude greater than 3Ã—10-24 would have been detected. Â© 2009 The American Physical Society.

Go to article

Analytical And Computational Studies Of Magneto-Convection In Solidifying Mushy Layer, Mallikarjunaiah Siddapura Muddamallappa

Theses and Dissertations - UTB/UTPA

Natural convection in solidifying binary media is of great interest due to it's applications in material processing and crystal growth industries. Convective flows between the layers of melt during alloy solidification is known to produce mechanical imperfections such as freckle's. Hence it is important to investigate the criterion for freckling and discover the means of suppressing it. A mushy layer, which has both solid and fluid components and is formed between underlying solid and overlying liquid, is known to produce chimneys, which are narrow, vertical vents, devoid of solid. We consider the problem of magneto-convection in a horizontal mushy layer …

Go to article

Effects Of Adding An Enhanced Material Instructional Model To A Collaborative Grouping Instructional Strategy In A College Preparatory Chemistry Course, Chinyere Fidelia Shaw-Nnajiofor

Theses and Dissertations - UTB/UTPA

This research study investigated comparable academic achievement outcomes between an experimental group (EG) and a control group (CG) in a college preparatory chemistry course using a mixture of instructional pedagogies. The subjects comprised native and non-native English speakers, often identified as Limited English Proficiency (LEP) students. The study found no statistically significant difference between the pre-test scores of EG and CG students and a significant difference between the post-test scores of students in the experimental group compared to those of the control group. No significant difference was observed when comparing the test scores of the post-tests of the LEP-EG students …

Go to article

Two-Dimensional Wigner-Ville Transforms And Their Basic Properties, Bheemaiah Veena Shankara Narayana Rao

Theses and Dissertations - UTB/UTPA

This thesis deals with Wigner-Ville transforms and their basic properties. The Wigner-Ville transforms are a non-linear transform which constitute an important tool in nonstationary signal analysis. Wigner-Ville transforms in one dimension and their basic properties are discussed here. Special attention is given to formulation of two dimensional Wigner-Ville transform, its inversion formula and some of their basic properties. Some applications of Wigner-Ville transforms are also briefly discussed.

Go to article

Reaction-Diffusion Systems With A Nonlinear Rate Of Growth, Yubing Wan

Theses and Dissertations - UTB/UTPA

In the literature there are quite a few elegant approaches which have been proposed to find (he first integrals of nonlinear differential equations. Recently, the modified Prelle-Singer method for finding the first integrals of second-order nonlinear ordinary differential equations (ODEs) has attracted considerable attention. Many researchers used this method to derive the first integrals to various systems. In this thesis, we are concerned with the first integrals for reaction-diffusion systems with a nonlinear rate of growth. Under certain parametric conditions we express the first integrals explicitly by applying an analytical method as well as the modified Prelle-Singer method.

Go to article

The Implementation And Analysis Of Through Wall Radar Systems, Xiaohui Wang

Theses and Dissertations - UTB/UTPA

Through wall radar detecting, locating, imaging and tracking is a topic of current research interest in connection with law enforcement, urban area operations and search and rescue missions. Up to now, three different radar techniques are employed in through wall radar systems, including impulse through wall radar, continuous wave radar and swept frequency radar. In this thesis, we set out to give a comparison of these three kinds of through wall radar systems. First,we studied the challenges caused by the wall in through wall radar systems. Second,we implemented these three kinds of through wall radar system. In each kind of …

Go to article

The Impact Of Focused Tutoring And Science Lab Instruction Strategies For An Elementary School In South Texas, Annabelle Paloma

Theses and Dissertations - UTB/UTPA

The purpose of this study was to determine the effect that focused tutoring and science lab methodologies have on 5th-grade student performance in science. The study examined how focused tutoring and science lab methodologies affect performance of 5th-grade students in science as measured by Texas Assessment of Academic Skills (TAKS). The problem is that far too many young Americans emerge from the nations elementary and secondary schools with an inadequate grounding in science. In correlation with this problem, if adequate instructional interventions are implemented, then students may be better prepared when tested with the science Texas Assessment of Knowledge and …

Go to article

The Impact Of Exchange Rate Movements On Firm Value In Emerging Markets: The Case Of Mexico, Chrystell Flota

Theses and Dissertations - UTB/UTPA

It is a widely held belief among financial theorists, economic analysts, empirical researchers, and even the financial press, that exchange rate fluctuations ought to affect a firm's cash flow expectations and thus the value of the firm. Previous research has examined the relationship between currency exposure and firm value by focusing primarily on developed economies and on various variables regarding the firm's assets and revenues. The empirical evidence has not fully established what the link is between currency exposure and firm value; however, the evidence suggests that the relationship could be firm-specific, depending on the geographical distribution of the firm's …

Go to article

Students With Learning Disabilities In Postsecondary Education: Differences Among Students With Varying Levels Of Self-Advocacy Skills And Academic Achievement, Diana Villanueva

Theses and Dissertations - UTB/UTPA

This quantitative study described factors that promote or discourage self- advocacy among students with learning disabilities at the postsecondary level. Data were gathered from students with learning disabilities at the postsecondary level and faculty members at the University of Texas-Pan American to address issues on accommodations as well as students' self perceptions regarding their learning disabilities. Five questionnaires were utilized to describe student and faculty member perceptions regarding learning disabilities and the accommodation process at the postsecondary level. Data from the study helped increase an understanding of the factors that may increase or decrease student academic success at the postsecondary …

Go to article

Integrable Equations With Non-Smooth Solitons, Xianqi Li

Theses and Dissertations - UTB/UTPA

In this thesis, we present a class of integrable equations with non-smooth soliton solutions. In particular, we derive the bi-Hamiltonian structure and Lax pair of the equation pt = bux + \[{u2 — u1)p]x,p = u — uxx, which guarantee its integrability. Another interesting integrable equation we study is (=Jff!i)t = 2uux, which is exactly the first member of the negative KdV hierarchy. Through traveling wave setting arid phase step analysis, we obtain non-smooth soliton solutions of these integrable equations under different boundary condition at infinities. These equations were shown to have peaked soliton (peakon), "W/M-shape" peakon or cusped soliton …

Go to article

A Dna Approach To The Road-Coloring Problem, Arindam Roy

Theses and Dissertations - UTB/UTPA

The Road-Coloring Problem in graph theory can be stated as follows: Is any irreducible aperiodic directed graph with constant outdegree 2 road-colorable? In other words, does such a graph have a synchronizing instruction? That is to say: can we label (or color) the two outgoing edges at each vertex, one with “b” or blue color and the other with “r” or red color, in such a manner that there will be an instruction in the form of a finite sequence in “b”s and “r”s (example: rrbrbbbr) such that this instruction will lead each vertex to the same “target” vertex? This …

Go to article

Observation Of A Kilogram-Scale Oscillator Near Its Quantum Ground State, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, Mario C. Diaz, Soumya Mohanty, Soma Mukherjee, Joseph D. Romano

Physics & Astronomy Faculty Publications

We introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system-an interferometric gravitational wave detector. The detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) operate within a factor of 10 of the standard quantum limit (SQL), providing a displacement sensitivity of 10-18 m in a 100 Hz band centered on 150 Hz. With a new feedback strategy, we dynamically shift the resonant frequency of a 2.7 kg pendulum mode to lie within this optimal band, where its effective temperature falls as low as 1.4Î¼K, and its occupation number reaches about 200 quanta. This work …

Go to article

Orange & White - Summer 2009, University Of Texas At Brownsville, Texas Southmost College

UTB/TSC Archives - Orange & White Magazine

No abstract provided.

Go to article

The Joy Of Difference: Foucault And Hadot On The Aesthetic And The Universal In Philosophy, Cory Wimberly

Philosophy Faculty Publications

The intersection of Foucault and Hadot's work in the philosophy of antiquity is a dense and fruitful meeting. Not only do each of the philosophers offer competing interpretations of antiquity, their differences also reflect on their opposing assessments of the contemporary situation and the continuing philosophical debate between the universal and the relative. Unpacking these two philosophers’ disagreements on antiquity sheds light on how Hadot’s commitment to the Universal and Foucault’s commitment to an aesthetics of existence stem from their diagnoses of the present and the persistent philosophical issue of universalism. This line of analysis is especially productive to pursue …

Go to article

Full-Text Articles in Entire DC Network

The Collegian (2009-10-12), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

The Collegian (2009-10-05), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Los Arcos - Fall 2009, University Of Texas-Pan American

UTPA Archives - Los Arcos Magazine

Utpa Stats At A Glance - Fall 2009, University Of Texas-Pan American

UTPA Archives - Stats At A Glance

An Expeditious Synthesis Of 3-Amino B-Lactams Derived From Polyaromatic Compounds, Gildardo Rivera, Debasish Bandyopadhyay, Sonam Jaggi, R. Christopher Gonzales, Bimal K. Banik

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

Indicadores Funcionales Y Estructurales Para Evaluar El Estado De Conservación De Humedales Costeros En El Sur De Tamaulipas, Alejandro Fierro-Cabo

School of Earth, Environmental, & Marine Sciences Faculty Publications

Subcellular Min Oscillations As A Single-Cell Reporter Of The Action Of Polycations Protamine And Gentamicin On Escherichia Coli, Benjamin P.B. Downing, Andrew D. Rutenberg, Ahmed Touhami, Manfred Jericho

Physics & Astronomy Faculty Publications

The Pan American (2009-09-24), Brian Silva

UTPA Archives - The Pan American Newspaper

First Ligo Search For Gravitational Wave Bursts From Cosmic (Super)Strings, B. P. Abbott, R. Abbott, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, R. Grosso, K. Hayama, H. Lei, Soumya Mohanty, Soma Mukherjee, Malik Rakhmanov, Joseph D. Romano, Robert Stone

Physics & Astronomy Faculty Publications

The Collegian (2009-09-21), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

The Collegian (2009-09-07), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

A Search For Periodic Gravitational Waves From Three Recycled Pulsars Using The Auriga Detector, A. Mion, M. J. Benacquista, M. Kramer, P. P.C. Freire, A. Possenti

Physics & Astronomy Faculty Publications

Search For Gravitational Wave Ringdowns From Perturbed Black Holes In Ligo S4 Data, B. P. Abbott, R. Abbott, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, R. Grosso, K. Hayama, Soumya Mohanty, Soma Mukherjee, Malik Rakhmanov, Joseph D. Romano, Robert Stone, Lappoon R. Tang

Physics & Astronomy Faculty Publications

The Pan American (2009-08-31), Brian Silva

UTPA Archives - The Pan American Newspaper

The Collegian (2009-08-31), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

The Collegian (2009-08-24), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Einstein@Home Search For Periodic Gravitational Waves In Early S5 Ligo Data, B. P. Abbott, R. Abbott, R. Adhikari, Teviet Creighton, Matthew Benacquista, Mario C. Diaz, Soma Mukherjee, Soumya D. Mohanty, Malik Rakhmanov, Joseph D. Romano

Physics & Astronomy Faculty Publications

Analytical And Computational Studies Of Magneto-Convection In Solidifying Mushy Layer, Mallikarjunaiah Siddapura Muddamallappa

Theses and Dissertations - UTB/UTPA

Effects Of Adding An Enhanced Material Instructional Model To A Collaborative Grouping Instructional Strategy In A College Preparatory Chemistry Course, Chinyere Fidelia Shaw-Nnajiofor

Theses and Dissertations - UTB/UTPA

Two-Dimensional Wigner-Ville Transforms And Their Basic Properties, Bheemaiah Veena Shankara Narayana Rao

Theses and Dissertations - UTB/UTPA

Reaction-Diffusion Systems With A Nonlinear Rate Of Growth, Yubing Wan

Theses and Dissertations - UTB/UTPA

The Implementation And Analysis Of Through Wall Radar Systems, Xiaohui Wang

Theses and Dissertations - UTB/UTPA

The Impact Of Focused Tutoring And Science Lab Instruction Strategies For An Elementary School In South Texas, Annabelle Paloma

Theses and Dissertations - UTB/UTPA

The Impact Of Exchange Rate Movements On Firm Value In Emerging Markets: The Case Of Mexico, Chrystell Flota

Theses and Dissertations - UTB/UTPA

Students With Learning Disabilities In Postsecondary Education: Differences Among Students With Varying Levels Of Self-Advocacy Skills And Academic Achievement, Diana Villanueva

Theses and Dissertations - UTB/UTPA

Integrable Equations With Non-Smooth Solitons, Xianqi Li

Theses and Dissertations - UTB/UTPA

A Dna Approach To The Road-Coloring Problem, Arindam Roy

Theses and Dissertations - UTB/UTPA

Observation Of A Kilogram-Scale Oscillator Near Its Quantum Ground State, B. P. Abbott, R. Abbott, R. Adhikari, P. Ajith, B. Allen, G. Allen, Mario C. Diaz, Soumya Mohanty, Soma Mukherjee, Joseph D. Romano

Physics & Astronomy Faculty Publications

Orange & White - Summer 2009, University Of Texas At Brownsville, Texas Southmost College

UTB/TSC Archives - Orange & White Magazine

The Joy Of Difference: Foucault And Hadot On The Aesthetic And The Universal In Philosophy, Cory Wimberly

Philosophy Faculty Publications