Digital Commons Network^™

Document Collection Visualization And Clustering Using An Atom Metaphor For Display And Interaction, Khanh V. Nghi

Theses and Dissertations - UTB/UTPA

Visual Data Mining have proven to be of high value in exploratory data analysis and data mining because it provides an intuitive feedback on data analysis and support decision-making activities. Several visualization techniques have been developed for cluster discovery such as Grand Tour, HD-Eye, Star Coordinates, etc. They are very useful tool which are visualized in 2D or 3D; however, they have not simple for users who are not trained. This thesis proposes a new approach to build a 3D clustering visualization system for document clustering by using k-mean algorithm. A cluster will be represented by a neutron (centroid) and …

I. Norbornene As Organocatalyst: Unusual: Amination Ii. Stereoselective Synthesis Of 3, 4 Di-Substituted Β-Lactams; Classical Vs Microwave Method, Ravi Reddaboyna

Theses and Dissertations - UTB/UTPA

I. Amine functionality is important in the preparation of biologically active and industrially useful molecules. Many approaches to form C―N bonds provide access to fine chemical building blocks, pharmaceuticals, agrochemicals, and surfactants. Microwave irradiation is a highly recommended ecofriendly approach for the synthesis of medicinally important compounds. Organic catalysis is important segment in the field of organic chemistry, for the synthesis of many complex molecules by providing a number of advantages.

II. Cancer refers to a large group of diseases characterized by uncontrolled cell multiplication and the ability of these cells to enter other tissues and spread to other parts …

Mobile Personal Health System For Ambulatory Blood Pressure Monitoring, Luis J. Mena, Vanessa G. Felix, Rodolfo Ostos, Jesus A. Gonzalez, Armando Cervantes, Armando Ochoa, Carlos Ruiz, Roberto Ramos, Gladys E. Maestre

School of Medicine Publications

The ARVmobile v1.0 is a multiplatform mobile personal health monitor (PHM) application for ambulatory blood pressure (ABP) monitoring that has the potential to aid in the acquisition and analysis of detailed profile of ABP and heart rate (HR), improve the early detection and intervention of hypertension, and detect potential abnormal BP and HR levels for timely medical feedback. The PHM system consisted of ABP sensor to detect BP and HR signals and smartphone as receiver to collect the transmitted digital data and process them to provide immediate personalized information to the user. Android and Blackberry platforms were developed to detect …

A Historical Snapshot On The Progression Of Educational And Social Opportunities For Mexican American Students In The San Benito Public School System, 1909-2009, Marco Antonio Lara, Jr.

Theses and Dissertations - UTB/UTPA

This study investigates the barriers Mexican American students encountered in educational and social opportunities within the San Benito Public School System from 1909 to 2009. This qualitative research study was organized chronologically by collecting information on the city, school district, and students who attended the San Benito Public School System. Personal and telephone interviews, as well as emailed questionnaires/surveys were used to gather firsthand information from former students, and current/former teachers, administrators, and board member of the district. A review of school board minutes, high school yearbooks, newspaper articles, books, and other related materials were also included for use in …

Efficacy Beliefs Of Beginning Hispanic Teachers And The Organizational Health Of Schools In A South Texas School District, Gisela S. Saenz

Theses and Dissertations - UTB/UTPA

This quantitative study examined the relationship between teachers’ sense of efficacy and school organizational health. Teachers’ sense of efficacy was measured using three dimensions of teacher efficacy: efficacy in student engagement, efficacy in instructional strategies, and efficacy in classroom management. Organizational health was measured using dimensions of school health for elementary, middle, and high school including: academic emphasis, institutional integrity, collegial leadership, resource influence, teacher affiliation, morale, principal influence, resource support, consideration, and initiating structure. The sample consisted of 498 beginning Hispanic teachers with one to five years of teaching experience. The sample included, 255 elementary, 126 middle school, and …

Mathematical Modeling Of Two-Phase Arterial Blood Flow, Ani Emire Garcia Escorcia

Theses and Dissertations - UTB/UTPA

Problem of blood flow in an artery with or without catheter and in the presence of single or multi stenosis will be considered. The presence of stenosis locally thickens the artery wall and the use of catheter in the affected area is very important to the diagnostic and treatment of the patient. The blood flow in the arterial tube is represented by a two-phase model composing a suspension of erythrocytes in plasma. The governing equations for both fluid and particles are solved subjected to reasonable modeling and approximations. The important quantities such as blood speed, blood pressure force, impedance (blood …

Vizlab: The Design And Implementation Of An Immersive Virtual Environment System Using Game Engine Technology And Open Source Software, Moises D. Carrillo

Theses and Dissertations - UTB/UTPA

Virtual Reality (VR) is a term used to describe computer-simulated environments that can immerse users in a real or unreal world. Immersive systems are an essential component when experiencing virtual environments. Developing VR applications is time-consuming, and developers use many resources in creating VR applications. The separate components require integration, and the challenges in using public domain open source software present complex software development. The VizLab Virtual Reality System was created to meet these challenges and provide an integrated suite of tools for VR system development. VizLab supports the development of VR applications by using game engine and CAVE system …

Calibration And Optimization Of A Load Sensor Embedded In A Railroad Bearing Adapter, Lorenzo Saenz Iv

Theses and Dissertations - UTB/UTPA

Freight railcars rely heavily on weigh bridges and stations to determine cargo load. As a consequence, all load measurements are limited to certain locations and specified prices. To this end, this study presents work performed to develop one of the first economical, reliable sensors for keeping track of both dynamic and static loads on a freight railcar. Preliminary testing provided a strain-gauge based sensor that delivered load information in the laboratory environment. Federal Railroad Association (FRA) protocol testing was met and consistent results were obtained from the sensing device. The latter allowed for an optimized sensor that could potentially deliver …

Electrospinning Nanofibers For Controlled Drug Release, Indrani Banik

Theses and Dissertations - UTB/UTPA

Electrospinning is the most widely studied technique for the synthesis of nanofibers. Electrospinning is considered as one of the technologies that can produce nanosized drugs incorporated in polymeric nanofibers. In vitro and in vivo studies have demonstrated that the release rates of drugs from these nanofiber formulations are enhanced compared to those from original drug substance. This technology has the potential for enhancing the oral delivery of poorly soluble drugs [1]. The electrospun mats were made using Polycaprolactone/PCL, Poly(DL-lactide)/PDL 05 and Poly(DL-lactide-co-glycolide)/PLGA. The drugs incorporated in the electrospun fibers were 5-Fluorouracil and Rapamycin. The evidence of the drugs being embedded …

The Collegian (2013-04-29), Joe Molina

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 65, No. 28

Utb Admissions Brochure - We'll Change Your Life, An Introduction To Utb, University Of Texas At Brownsville And Texas Southmost College. Office Of News And Information

UTB/TSC Archives - Factbooks & Brochures

No abstract provided.

The Collegian (2013-04-22), Joe Molina

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 65, No. 27

Lesson Plan, 7th Grade, English Language Arts - Culturally Relevant Pedagogy, Courtney Wai

Community Historical Archaeology Project with Schools (CHAPS) Educational Resources

Sponsored by NEH.

The Pan American (2013-04-11), Karen Antonacci, Daniella Diaz

UTPA Archives - The Pan American Newspaper

Vol. 69, No. 24

The Schwinger Action Principle And Its Applications To Quantum Mechanics, Paul Bracken

School of Mathematical & Statistical Sciences Faculty Publications

No abstract provided.

Utb/Tsc Commencement – Spring 2013, University Of Texas At Brownsville, Texas Southmost College

Brownsville Archives - Legacy Commencement Programs

No abstract provided.

The Collegian (2013-04-01), Joe Molina

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 65, No. 25

The Thermodynamics Of Dna Loop Formation, From J To Z, Stephen D. Levene, Stefan M. Giovan, Andreas Hanke, Massa J. Shoura

Physics & Astronomy Faculty Publications

The formation of DNA loops is a ubiquitous theme in biological processes, including DNA replication, recombination and repair, and gene regulation. These loops are mediated by proteins bound at specific sites along the contour of a single DNA molecule, in some cases many thousands of base pairs apart. Loop formation incurs a thermodynamic cost that is a sensitive function of the length of looped DNA as well as the geometry and elastic properties of the DNA-bound protein. The free energy of DNA looping is logarithmically related to a generalization of the Jacobson-Stockmayer factor for DNA cyclization, termed the J factor. …

Cross Case Analysis Of Three Middle School Mathematics Teachers, Sandra Quiroz

Theses and Dissertations - UTB/UTPA

This cross-case analysis was designed to investigate the instructional practices middle school mathematics teachers use in classes with English language learners (ELLs); how the different practices result in differential student achievement; the types of professional development middle school mathematics teachers attend; and what effect the mathematics teachers’ academic background have on the academic achievement of ELLs. The study was facilitated by the use of data from lesson plans, observations, interviews, academic background, and professional development sessions for three seventh-grade mathematics teachers and their students’ proficiency on the seventh-grade mathematics state achievement. Investigation of the lesson plans, observations and classroom culture …

Myth, Memory And The Reagan Legacy: Taxes And The Gop, Michael Espinoza

Political Science Faculty Publications

No abstract provided.

The Pan American (2013-03-21), Karen Antonacci, Daniella Diaz

UTPA Archives - The Pan American Newspaper

Vol. 69, No. 22

The Collegian (2013-03-18), Joe Molina

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 65, No. 23

A Biodistribution And Toxicity Study Of Cobalt Dichloride–Nacetyl Cysteine (C4) As An Implantable Mri Marker For Prostate Cancer Treatment, Steven J. Frank, Mary J. Johansen, Karen S. Martirosyan, Mihai Gagea, Carolyn S. Van Pelt

Physics & Astronomy Faculty Publications

Purpose—C4, a cobalt dichloride–N-acetyl cysteine complex, is being developed as a positivesignal magnetic resonance imaging (MRI) marker to localize implanted radioactive seeds in prostate brachytherapy. We evaluated the toxicity and biodistribution of C4 in rats with the goal of simulating systemic effects of potential leakage from C4 MRI markers within the prostate.

Methods—9 μl doses (equivalent to leakage from 120 markers in a human) of control (0.9% sodium chloride), 1% (proposed for clinical use) and 10% C4 solution were injected into the prostates of male Sprague-Dawley rats via laparotomy. Organ toxicity and cobalt disposition in plasma, tissues, feces …

Novel Patterns Of Torsion-Inversion-Rotation Energy Levels In The Ν11 Asymmetric Ch-Stretch Spectrum Of Methylamine, Mahesh B. Dawadi, C. Michael Lindsay, Andrei Chirokolava, David S. Perry, Li Hong Xu

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

The high-resolution infrared spectrum of methylamine (CH3NH2) has been recorded using slit-jet direct absorption spectroscopy in the ν11 CH-stretch region (2965–3005 cm−1) with a resolution of 0.0025 cm−1. The 621 lines assigned by ground state combination differences represent 27 substates with |K′| ≤ 2 for the A, B, E1, and E2 symmetries. The spectrum of CH3NH2 is complicated by torsion and inversion tunneling connecting six equivalent minima. The upper states K′ = 0, ± 1 for E1 and E2 are substantially perturbed by “dark” states. The result in the spectrum is multiplets of 2 or 3 …

The Collegian (2013-03-04), Joe Molina

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 65, No. 22

The Pan American (2013-02-28), Karen Antonacci, Daniella Diaz

UTPA Archives - The Pan American Newspaper

Vol. 69, No. 20

The Effects Of Labeling Hispanic English Language Learners As Learning Disabled, Sandra Irma Rodriguez

Theses and Dissertations - UTB/UTPA

English language learners (ELLs) are often placed in special education due to lack of knowledge on the part of educators of the language acquisition process and because of the pressures educators face to meet state and federal accountability standards. Once in special education, many students’ experiences lead to negative outcomes for those students including stigmatization, inadequate academic preparation, and few opportunities for a successful professional career potential. The purpose of this cross case study was to investigate the effects of labeling English language learners as learning disabled (LD). Three ELLs with normal intelligence who were labeled as LD and placed …

The Collegian (2013-02-18), Joe Molina

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 65, No. 20

The Pan American (2013-02-14), Karen Antonacci, Daniella Diaz

UTPA Archives - The Pan American Newspaper

Vol. 69, No. 18

Einstein@Home All-Sky Search For Periodic Gravitational Waves In Ligo S5 Data, J. Aasi, J. Abadie, B. P. Abbott, Matthew Benacquista, Teviet Creighton, Mario C. Diaz, Soma Mukherjee, Malik Rakhmanov, Volker Quetschke, Joseph D. Romano

Physics & Astronomy Faculty Publications

This paper presents results of an all-sky search for periodic gravitational waves in the frequency range [50,1 190]  Hz and with frequency derivative range of ∼[−20,1.1]×10−10  Hz s−1 for the fifth LIGO science run (S5). The search uses a noncoherent Hough-transform method to combine the information from coherent searches on time scales of about one day. Because these searches are very computationally intensive, they have been carried out with the Einstein@Home volunteer distributed computing project. Postprocessing identifies eight candidate signals; deeper follow-up studies rule them out. Hence, since no gravitational wave signals have been found, we report upper limits on …