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An Investigation Of High School Dual Enrollment Participation And Allied Health Program Enrollment In A South Texas University, Martina Flores Dec 2010

An Investigation Of High School Dual Enrollment Participation And Allied Health Program Enrollment In A South Texas University, Martina Flores

Theses and Dissertations - UTB/UTPA

The shortage of allied health professionals has caught the attention of legislators and higher education institution administrators. The current study used a concurrent embedded mixed method design to investigate factors that motivated students to participate in health science technology (HST) dual enrollment courses while still in high school. It sought to identify the factors or variables students believed helped them be successful in the health science courses. Additionally, the quantitative portion of the study investigated academic achievement as a function of high school achievement (HSAch), high school performance (HSPerf), Aptitude (Apt), and ProActive measures taken by students. Two focus groups …

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The Conservative Conversation, Heather Hall Dec 2010

The Conservative Conversation, Heather Hall

Theses and Dissertations - UTB/UTPA

The conservative movement is defined by its ideology as well as its rhetoric. Richard Weaver’s conversion to the Right offers an opportunity to define conservatism and conservative rhetoric through his hierarchy of argumentation, and his examination of Plato’s Phaedrus allows an examination of the speaker’s nature and the nature of rhetoric. Glenn Beck, one of today’s most controversial conservative representatives, also deserves examination for his ideology and rhetoric. Both Richard Weaver and Glenn Beck bear scrutiny as influential members of the conservative movement and the role their rhetoric has in the conservative conversation today.

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Spectral Reflectance As An Indicator Of Foliar Concentrations Of Arsenic In Common Sunflower (Helianthus Annuus), Yuridia Patricia Peralta De Gandy Dec 2010

Spectral Reflectance As An Indicator Of Foliar Concentrations Of Arsenic In Common Sunflower (Helianthus Annuus), Yuridia Patricia Peralta De Gandy

Theses and Dissertations - UTB/UTPA

Studies were conducted to investigate the use of spectral reflectance by foliage of common sunflower as a potential indicator of arsenic contamination of soil. Germination method was developed for sunflower seeds, and cohorts of sunflower seedlings in hydroponic tanks were established. The cohorts were exposed to 0 ppm, 5 ppm, 7.5 ppm, and 10 ppm treatments of As (V) and reflectance measurements of foliage were collected using a spectroradiometer during two experiments.Results demonstrated the feasibility of using spectral reflectance by foliage of common sunflower as a potential indicator of arsenic contamination. In both experiments, arsenic concentrations in leaf tissues were …

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Design And Implementation Of An Actively Adjustable Spring Mechanism Via Redundant Actuation, Eleazar Marquez Dec 2010

Design And Implementation Of An Actively Adjustable Spring Mechanism Via Redundant Actuation, Eleazar Marquez

Theses and Dissertations - UTB/UTPA

This study presents the theoretical results and experimental validation of an adjustable stiffness mechanism. The use of redundant actuation is emphasized in the design of a one-degree-of-freedom Watt II mechanism capable of independently controlling the effective stiffness without a change in equilibrium position. This approach is in contrast to previous spring mechanism designs unable to actively control the spring rate independent of deflection, and has potential applications in various types of suspension and assembly systems. Results indicate that driving the redundantly actuated, unidirectional, spring mechanism requires attaching two direct brush-type direct current motors on each of the two grounded revolute …

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Photolithographic Fabrication Of 3d Penrose-Like Quasi-Photonic Crystal Polymeric Templates Utilizing Lab-Made Phasemask, Faraon Torres-Lazos Dec 2010

Photolithographic Fabrication Of 3d Penrose-Like Quasi-Photonic Crystal Polymeric Templates Utilizing Lab-Made Phasemask, Faraon Torres-Lazos

Theses and Dissertations - UTB/UTPA

Photonic crystals (PhC) have recently become of great interest because of their potential as replacement of electronics and/or supplement to semiconductors technology. The PhC’s capability to make compact integrated optical circuits has already made possible the laboratory manufacture of an array of different types of optical waveguides, cavities and filters. The work presented here aimed to simultaneously fabricate a 3D-PhC templates employing six-beam holographic lithography. The basic procedures included recording gratings using interference field of laser sources in a photoresist coating on a glass substrate. The manufacturing method utilized only one optical element, a phasemask, drastically reducing the complexity of …

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A Critical Analysis Of The Identification, Placement, And Assessment Policies For Achieving Educational Parity Of Bilingual Learners, Lilia Rocio Estrada Dec 2010

A Critical Analysis Of The Identification, Placement, And Assessment Policies For Achieving Educational Parity Of Bilingual Learners, Lilia Rocio Estrada

Theses and Dissertations - UTB/UTPA

This study analyzed the process of proper identification, placement, and assessment of Bilingual Learners (BLs) by investigating the perceptions of members in the Texas Language Proficiency Assessment Committee (LPAC). The findings focused on LPAC perceptions of their decisions to identify, place, and assess BLs as well as how these compared among members with different positions. Also, the LPAC members’ perceptions from schools that followed a dual language education program were compared to those schools that followed a transitional bilingual education program. It was found that majority of LPAC members lacked the confidence in assessing BLs, LPAC members holding higher positions …

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Surface Optimization Of High Density Polyethylene And Carbon Nanofiber Composites For The Improvement Of Electromagnetic Shielding Effectiveness, Brandon C. Jarvis Dec 2010

Surface Optimization Of High Density Polyethylene And Carbon Nanofiber Composites For The Improvement Of Electromagnetic Shielding Effectiveness, Brandon C. Jarvis

Theses and Dissertations - UTB/UTPA

Nanoreinforced composites of High Density Polyethylene (HDPE) and Carbon Nanofibers (CNF) of varying nanofiber concentration were fabricated via melt mixing. Following fabrication, various metal and metal-nitride thin films were sputter deposited upon the substrates. Volume resistivity measurements of the composite substrates, as well as four point probe analysis of the composites and the deposited films were performed and are reported. Electromagnetic Interference (EMI) Shielding Effectiveness (SE) measurements were performed upon all samples in order to gauge the effects of percolation and the presence of the deposited film(s) upon overall SE. Comparisons of experimental measurements with analytical models available in the …

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The Collegian (2010-11-29), Christine Cavazos Nov 2010

The Collegian (2010-11-29), Christine Cavazos

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 63, No. 14

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The Pan American (2010-11-18), Kristen Cabrera Nov 2010

The Pan American (2010-11-18), Kristen Cabrera

UTPA Archives - The Pan American Newspaper

Vol. 67, No. 11

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A Highly Efficient Bismuth Salts-Catalyzed Route For The Synthesis Of Alpha-Aminophosphonates, Antara Banik, Sahil Batta, Debasish Bandyopadhyay, Bimal K. Banik Nov 2010

A Highly Efficient Bismuth Salts-Catalyzed Route For The Synthesis Of Alpha-Aminophosphonates, Antara Banik, Sahil Batta, Debasish Bandyopadhyay, Bimal K. Banik

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

A convenient synthesis of different types of α-amino phosphonates via one-pot solvent-free three component reactions of aldehydes, amines and phosphites catalyzed by bismuth salts has been investigated. Bismuth triflate is found to be the most effective catalyst for this reaction.

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Importance Of Electronic Relaxation For Inter-Coulombic Decay In Aqueous Systems, Craig P. Schwartz, Shervin Fatehi, Richard J. Saykally, David Prendergast Nov 2010

Importance Of Electronic Relaxation For Inter-Coulombic Decay In Aqueous Systems, Craig P. Schwartz, Shervin Fatehi, Richard J. Saykally, David Prendergast

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

Inspired by recent photoelectron spectroscopy experiments on hydroxide solutions, we have examined the conditions necessary for enhanced (and, in the case of solutions, detectable) inter-Coulombic decay (ICD)—Auger emission from an atomic site other than that originally excited. We present general guidelines, based on energetic and spatial overlap of molecular orbitals, for this enhancement of inter-Coulombic decay-based energy transfer in solutions. These guidelines indicate that this decay process should be exhibited by broad classes of biomolecules and suggest a design criterion for targeted radiooncology protocols. Our findings show that photoelectron spectroscopy cannot resolve the current hydroxide coordination controversy.

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The Collegian (2010-11-01), Christine Cavazos Nov 2010

The Collegian (2010-11-01), Christine Cavazos

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 63, No. 11

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Electrospinning To Forcespinning™, Kamal Sarkar, Carlos Gomez, Steve Zambrano, Michael Ramirez, Eugenio De Hoyos, Horacio Vasquez, Karen Lozano Nov 2010

Electrospinning To Forcespinning™, Kamal Sarkar, Carlos Gomez, Steve Zambrano, Michael Ramirez, Eugenio De Hoyos, Horacio Vasquez, Karen Lozano

Mechanical Engineering Faculty Publications

A new process called Forcespinning™ has been developed to make nanofibers from a wide range of materials. This new method uses centrifugal force, rather than electrostatic force as in the electrospinning process. The Forcespinning™ method uses either solutions or solid materials that are solution or melt spun into nanofibers. Key parameters to control the geometry and morphology of the nanofibers include rotational speed of the spinneret, collection system and temperature. Orifices of the spinneret can have arbitrary geometric shapes to provide corresponding cross-section of nanofibers. The Forcespinning™ method has been successfully used to make nanofibers of poly-ethylene …

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The Collegian (2010-10-25), Christine Cavazos Oct 2010

The Collegian (2010-10-25), Christine Cavazos

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 63, No. 10

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First Search For Gravitational Waves From The Youngest Known Neutron Star, J. Abadie, B. P. Abbott, R. Abbott, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, Soumya D. Mohanty, Soma Mukherjee, Volker Quetschke, Malik Rakhmanov, Joseph D. Romano Oct 2010

First Search For Gravitational Waves From The Youngest Known Neutron Star, J. Abadie, B. P. Abbott, R. Abbott, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, Soumya D. Mohanty, Soma Mukherjee, Volker Quetschke, Malik Rakhmanov, Joseph D. Romano

Physics & Astronomy Faculty Publications

We present a search for periodic gravitational waves from the neutron star in the supernova remnant Cassiopeia A. The search coherently analyzes data in a 12 day interval taken from the fifth science run of the Laser Interferometer Gravitational-Wave Observatory. It searches gravitational-wave frequencies from 100 to 300 Hz and covers a wide range of first and second frequency derivatives appropriate for the age of the remnant and for different spin-down mechanisms. No gravitational-wave signal was detected. Within the range of search frequencies, we set 95% confidence upper limits of (0.7-1.2) × 10 -24 on the intrinsic gravitational-wave strain, (0.4-4) …

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Detecting Massive Gravitons Using Pulsar Timing Arrays, Kejia Lee, F. A. Jenet, Richard H. Price, Norbert Wex, Michael Kramer Oct 2010

Detecting Massive Gravitons Using Pulsar Timing Arrays, Kejia Lee, F. A. Jenet, Richard H. Price, Norbert Wex, Michael Kramer

Physics & Astronomy Faculty Publications

At the limit of weak static fields, general relativity becomes Newtonian gravity with a potential field that falls off as inverse distance rather than a theory of Yukawa-type fields with a finite range. General relativity also predicts that the speed of disturbances of its waves is c, the vacuum light speed, and is non-dispersive. For these reasons, the graviton, the boson for general relativity, can be considered to be massless. Massive gravitons, however, are features of some alternatives to general relativity. This has motivated experiments and observations that, so far, have been consistent with the zero-mass graviton of general relativity, …

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Ultra-Compact Dwarfs In The Core Of The Coma Cluster, Juan P. Madrid, Alister W. Graham, William E. Harris, Paul Goudfrooij, Duncan A. Forbes, David Carter, John P. Blakeslee, Lee R. Spitler, Henry C. Ferguson Oct 2010

Ultra-Compact Dwarfs In The Core Of The Coma Cluster, Juan P. Madrid, Alister W. Graham, William E. Harris, Paul Goudfrooij, Duncan A. Forbes, David Carter, John P. Blakeslee, Lee R. Spitler, Henry C. Ferguson

Physics & Astronomy Faculty Publications

We have discovered both a red and a blue subpopulation of ultra-compact dwarf (UCD) galaxy candidates in the Coma galaxy cluster. We analyzed deep F475W (Sloan g) and F814W (I) Hubble Space Telescope images obtained with the Advanced Camera for Surveys Wide Field Channel as part of the Coma Cluster Treasury Survey and have fitted the light profiles of similar to 5000 point-like sources in the vicinity of NGC 4874, one of the two central dominant galaxies of the Coma Cluster. Although almost all of these sources are globular clusters that remain unresolved, we found that 52 objects have effective …

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The Collegian (2010-10-18), Christine Cavazos Oct 2010

The Collegian (2010-10-18), Christine Cavazos

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 63, No. 9

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The Collegian (2010-10-11), Christine Cavazos Oct 2010

The Collegian (2010-10-11), Christine Cavazos

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 63, No. 8

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Dissipation Scales And Anomalous Sinks In Steady Two-Dimensional Turbulence, Eleftherios Gkioulekas Oct 2010

Dissipation Scales And Anomalous Sinks In Steady Two-Dimensional Turbulence, Eleftherios Gkioulekas

School of Mathematical & Statistical Sciences Faculty Publications

In previous papers I have argued that the fusion rules hypothesis, which was originally introduced by L’vov and Procaccia in the context of the problem of three-dimensional turbulence, can be used to gain a deeper insight in understanding the enstrophy cascade and inverse energy cascade of two-dimensional turbulence. In the present paper, we show that the fusion rules hypothesis, combined with nonperturbative locality, itself a consequence of the fusion rules hypothesis, dictates the location of the boundary separating the inertial range from the dissipation range. In so doing, the hypothesis that there may be an anomalous enstrophy sink …

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The Pan American (2010-10-07), Kristen Cabrera Oct 2010

The Pan American (2010-10-07), Kristen Cabrera

UTPA Archives - The Pan American Newspaper

Vol. 67, No. 6

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Molecular Mechanisms Of Persistence Of Mutualistic Bacteria Photorhabdus In The Entomopathogenic Nematode Host, Ruisheng An, Parwinder Grewal Oct 2010

Molecular Mechanisms Of Persistence Of Mutualistic Bacteria Photorhabdus In The Entomopathogenic Nematode Host, Ruisheng An, Parwinder Grewal

School of Earth, Environmental, & Marine Sciences Faculty Publications

Symbioses between microbes and animals are ubiquitous, yet little is known about the intricate mechanisms maintaining such associations. In an emerging mutualistic model system, insect-pathogenic bacteria Photorhabdus and their insect-parasitic nematode partner Heterorhabditis, we found that the bacteria undergo major transcriptional reshaping in the nematode intestine. Besides general starvation mechanisms, the bacteria induce cellular acidification to slow down growth, switch to pentose phosphate pathway to overcome oxidative stress and nutrition limitation, and shed motility but develop biofilm to persist in the nematode intestine until being released into the insect hemolymph. These findings demonstrate how the symbiotic bacteria reduce their …

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The Collegian (2010-10-04), Christine Cavazos Oct 2010

The Collegian (2010-10-04), Christine Cavazos

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 63, No. 7

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Los Arcos - Fall 2010, University Of Texas-Pan American Oct 2010

Los Arcos - Fall 2010, University Of Texas-Pan American

UTPA Archives - Los Arcos Magazine

No abstract provided.

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The Pan American (2010-10-01), Kristen Cabrera Oct 2010

The Pan American (2010-10-01), Kristen Cabrera

UTPA Archives - The Pan American Newspaper

Vol. 67, No. 5

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Orange & White - Fall 2010, University Of Texas At Brownsville, Texas Southmost College Oct 2010

Orange & White - Fall 2010, University Of Texas At Brownsville, Texas Southmost College

UTB/TSC Archives - Orange & White Magazine

No abstract provided.

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Utpa Commencement – Fall 2010, University Of Texas-Pan American Oct 2010

Utpa Commencement – Fall 2010, University Of Texas-Pan American

Edinburg Archives - Legacy Commencement Programs

No abstract provided.

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Utpa Stats At A Glance - Fall 2010, University Of Texas-Pan American Oct 2010

Utpa Stats At A Glance - Fall 2010, University Of Texas-Pan American

UTPA Archives - Stats At A Glance

No abstract provided.

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The Collegian (2010-09-27), Christine Cavazos Sep 2010

The Collegian (2010-09-27), Christine Cavazos

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 63, No. 6

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The Pan American (2010-09-23), Kristen Cabrera Sep 2010

The Pan American (2010-09-23), Kristen Cabrera

UTPA Archives - The Pan American Newspaper

Vol. 67, No. 4

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