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open access

Slaves and Slaveholders in the Choctaw Nation: 1830-1866

Description: Racial slavery was a critical element in the cultural development of the Choctaws and was a derivative of the peculiar institution in southern states. The idea of genial and hospitable slave owners can no more be conclusively demonstrated for the Choctaws than for the antebellum South. The participation of Choctaws in the Civil War and formal alliance with the Confederacy was dominantly influenced by the slaveholding and a connection with southern identity, but was also influenced by financial … more
Date: May 2009
Creator: Fortney, Jeffrey L., Jr.
Partner: UNT Libraries
open access

Predicting Chemical and Biochemical Properties Using the Abraham General Solvation Model

Description: Several studies were done to illustrate the versatillity of the Abraham model in mathematically describing the various solute-solvent interactions found in a wide range of different chemical and biological systems. The first study focused on using the solvation model to construct mathematical correlations describing the minimum inhibitory concentration of organic compounds for growth inhibition towards the three bacterial strains Porphyromonas gingivalis, Selenomonas artemidis, and Streptococc… more
Date: May 2009
Creator: Mintz, Christina
Partner: UNT Libraries
open access

Grounds-Based and Grounds-Free Voluntarily Child Free Couples: Privacy Management and Reactions of Social Network Members

Description: Voluntarily child free (VCF) individuals face stigmatization in a pronatalist society that labels those who do not want children as deviant. Because of this stigmatization, VCF couples face privacy issues as they choose to reveal or conceal their family planning decision and face a variety of reactions from social network members. Therefore, communication privacy management and communication accommodation theory was use to examine this phenomenon. Prior research found two different types of VCF… more
Date: May 2009
Creator: Regehr, Kelly A.
Partner: UNT Libraries
open access

Primary Stylistic Characteristics of Cindy McTee's Music as found in Timepiece, Ballet for Band and Finish Line

Description: Cindy McTee, Regents Professor of Composition in the College of Music at the University of North Texas, is one of America's leading composers. Her music is an eclectic blend of the "American" sound that is created by the use of a multiplicity of techniques. This document uses three of McTee's most recent (to date) works for wind band: Timepiece, Ballet for Band and Finish Line, to identify the primary stylistic characteristic's of the composer's music, which include: jazz influence; use of osti… more
Date: May 2009
Creator: Williams, Nicholas, 1974-
Partner: UNT Libraries
open access

Level Curves of the Angle Function of a Positive Definite Symmetric Matrix

Description: Given a real N by N matrix A, write p(A) for the maximum angle by which A rotates any unit vector. Suppose that A and B are positive definite symmetric (PDS) N by N matrices. Then their Jordan product {A, B} := AB + BA is also symmetric, but not necessarily positive definite. If p(A) + p(B) is obtuse, then there exists a special orthogonal matrix S such that {A, SBS^(-1)} is indefinite. Of course, if A and B commute, then {A, B} is positive definite. Our work grows from the following quest… more
Date: December 2009
Creator: Bajracharya, Neeraj
Partner: UNT Libraries
open access

An Evaluation of the Effects of Two Different Role Play Formats on the Outcomes of a Parent Training Curriculum

Description: The current study was designed to replicate and extend previous research on the effectiveness of behavioral parent training. Specifically, the effectiveness of the Behavior Management and Parenting Services (BMAPS) curriculum in teaching parents to exhibit a set of parenting skills and respond accurately to a multiple choice examination about positive parenting techniques was evaluated. In addition, the curriculum was revised so that the relative effectiveness and acceptability of two role pla… more
Date: December 2009
Creator: Carlson Litscher, Barbara J.
Partner: UNT Libraries
open access

Learner-to-Learner: Refocusing the Lens of Educational Immediacy

Description: As the current body of instructional communication research focuses primarily on the relationship between teacher and learner, three studies investigating the relationship between learners were completed in order to better understand how student motivation and learning are influenced by learner-to-learner immediacy behaviors within the college classroom environment. Study I resulted in an extensive list of both positive and negative verbal and nonverbal immediacy behaviors commonly used by lear… more
Date: May 2009
Creator: Keller, Christine Ida
Partner: UNT Libraries
open access

Measurements of Time-Dependent CP-Asymmetry Parameters in B Meson Decays to \eta^{\prime} K^0 and of Branching Fractions of SU(3) Related Modes with BaBar Experiment at SLAC

Description: In this thesis work we have measured the following upper limits at 90% of confidence level, for B meson decays (in units of 10{sup -6}), using a statistics of 465.0 x 10{sup 6} B{bar B} pairs: {Beta}(B{sup 0} {yields} {eta}K{sup 0}) < 1.6 {Beta}(B{sup 0} {yields} {eta}{eta}) < 1.4 {Beta}(B{sup 0} {yields} {eta}{prime}{eta}{prime}) < 2.1 {Beta}(B{sup 0} {yields} {eta}{phi}) < 0.52 {Beta}(B{sup 0} {yields} {eta}{omega}) < 1.6 {Beta}(B{sup 0} {yields} {eta}{prime}{phi}) < 1.2 {Be… more
Date: January 22, 2009
Creator: Biassoni, Pietro & U., /Milan
Partner: UNT Libraries Government Documents Department
open access

Measurement of CP Content and Time-Dependent CP Violation in B0 --> D*+D*- Decays

Description: This dissertation presents the measurement of the Cp-odd fraction and time-dependent CP violation parameters for the B{sup 0} {yields} D*{sup +} D*{sup -} decay. These results are based on the full BABAR dataset of (467 {+-} 5) x 10{sup 6} B{bar B} pairs collected at the PEP-II B Factory at the Stanford Linear Accelerator Center. An angular analysis finds that the CP-odd fraction of the B{sup 0} {yields} D*{sup +} D*{sup -} decay is R{sub {perpendicular}} = 0.158 {+-} 0.028 {+-} 0.006, where th… more
Date: January 5, 2009
Creator: Anderson, Jacob M.
Partner: UNT Libraries Government Documents Department
open access

A search for muon neutrino to electron neutrino oscillations in the MINOS Experiment

Description: We perform a search for {nu}{sub {mu}} {yields} {nu}{sub e} oscillations, a process which would manifest a nonzero value of the {theta}{sub 13} mixing angle, in the MINOS long-baseline neutrino oscillation experiment. The analysis consists of searching for an excess of {nu}{sub e} charged-current candidate events over the predicted backgrounds, made mostly of neutral-current events with high electromagnetic content. A novel technique to select electron neutrino events is developed, which achiev… more
Date: October 1, 2009
Creator: Ochoa Ricoux, Juan Pedro & /Caltech
Partner: UNT Libraries Government Documents Department
open access

Simulation free measurement of the B+ lifetime using decays selected using displaced tracks

Description: The lifetime of the B{sup {+-}} meson is measured using the decay channel B{sup +} {yields} {bar D}{sup 0}{pi}{sup +}. The measurement is made using approximately 1.0 fb{sup -1} of Tevatron proton-anti-proton collision data at {radical}s = 1.96 TeV collected by the CDF detector. The data were collected using impact parameter based triggers that were designed to select events with a secondary vertex. The trigger selection criteria result in data rich in a variety of B hadron decays, but intrinsi… more
Date: March 1, 2009
Creator: Malde, Sneha
Partner: UNT Libraries Government Documents Department
open access

Search for the Standard Model Higgs boson in the missing energy topology with D0

Description: A search for the Standard Model Higgs boson in the missing energy and acoplanar b-jet topology is reported, using an integrated luminosity of 0.93 fb{sup -1} recorded by the D0 detector at the Fermilab Tevatron p{bar p} Collider. The analysis includes signal contributions from p{bar p} {yields} ZH {yields} {nu}{bar {nu}}b{bar b}, as well as from WH production in which the charged lepton from the W boson decay is undetected. Neural networks are used to separate signal from background. In the abs… more
Date: June 1, 2009
Creator: Christoudias, Theodoros
Partner: UNT Libraries Government Documents Department
open access

The Study and Implementation of Electrically Small Printed Antennas for an Integrated Transceiver Design

Description: This work focuses on the design and evaluation of the inverted-F, meandering-monopole, and loop antenna geometries. These printed antennas are studied with the goal of identifying which is suitable for use in a miniaturized transceiver design and which has the ability to provide superior performance using minimal Printed Circuit Board (PCB) space. As a result, the main objective is to characterize tradeoffs and identify which antenna provides the best compromise among volume, bandwidth and effi… more
Date: April 15, 2009
Creator: Speer, Pete
Partner: UNT Libraries Government Documents Department
open access

Scientist-Teacher Partnerships as Professional Development: An Action Research Study

Description: SUBMITTED AS A DOCTORAL DISSERTATION IN COMPLETION OF REQUIREMENTS FOR THE DEGREE OF ED.D THROUGH WASHINGTON STATE UNIVERSITY. The overall purpose of this action research study was to explore the experiences of ten middle school science teachers involved in a three-year partnership program between scientists and teachers at a Department of Energy national laboratory, including the impact of the program on their professional development, and to improve the partnership program by developing a set… more
Date: April 17, 2009
Creator: Willcuts, Meredith H.
Partner: UNT Libraries Government Documents Department
open access

Measurement of Differential Cross-Sections in the ttbar -> l+jets Channel

Description: The analysis presented in this thesis focuses on kinematic distributions in the t{bar t} system and studies in detail selected differential cross sections of top quarks as well as the reconstructed t{bar t} pair, namely the top quark transverse momentum and the t{bar t} system mass. The structure of the thesis is organized as follows: first the Standard Model of the particle physics is briefly introduced in Chapter 1, with relevant aspects of electroweak and strong interactions discussed. The p… more
Date: April 1, 2009
Creator: Kvita, J. & U., /Charles
Partner: UNT Libraries Government Documents Department
open access

Latent Transition Analysis of Pre-service Teachers' Efficacy in Mathematics and Science

Description: This study modeled changes in pre-service teacher efficacy in mathematics and science over the course of the final year of teacher preparation using latent transition analysis (LTA), a longitudinal form of analysis that builds on two modeling traditions (latent class analysis (LCA) and auto-regressive modeling). Data were collected using the STEBI-B, MTEBI-r, and the ABNTMS instruments. The findings suggest that LTA is a viable technique for use in teacher efficacy research. Teacher efficacy is… more
Date: December 2009
Creator: Ward, Elizabeth Kennedy
Partner: UNT Libraries
open access

A Study of Charged Current Single Charged Pion Productions on Carbon in a Few-GeV Neutrino Beam

Description: Understanding single charged pion production via neutrino-nucleus charged current interaction in the neutrino energy region of a few GeV is essential for future neutrino oscillation experiments since this process is a dominant background for {nu}{sub {mu}} {yields} {nu}{sub x} oscillation measurements. There are two contributions to this process: single pion production via baryonic resonance ({nu}{sub {mu}}N {yields} {mu}{sup -} N{pi}{sup +}) and coherent pion production interacting with the en… more
Date: January 1, 2009
Creator: Hiraide, Katsuki & U., /Kyoto
Partner: UNT Libraries Government Documents Department
open access

Search for the Higgs boson produced in association with a W boson at CDF Run II

Description: We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (p{bar p} {yields} W{sup {+-}}H {yields} {ell}{nu}b{bar b}) at a center of mass energy of 1.96 TeV. WH candidate events have a signature of a single lepton (E{sup {+-}}/{mu}{sup {+-}}), missing transverse energy, and two jets. The search looks for candidate events in approximately 2.7 fb{sup -1} of data recorded with the CDF II detector. The high-p{sub T} lepton (e,{mu}) i… more
Date: January 1, 2009
Creator: Slaunwhite, Jason Michael
Partner: UNT Libraries Government Documents Department
open access

Electrochemical arsenic remediation for rural Bangladesh

Description: Arsenic in drinking water is a major public health problem threatening the lives of over 140 million people worldwide. In Bangladesh alone, up to 57 million people drink arsenic-laden water from shallow wells. ElectroChemical Arsenic Remediation(ECAR) overcomes many of the obstacles that plague current technologies and can be used affordably and on a small-scale, allowing for rapid dissemination into Bangladesh to address this arsenic crisis. In this work, ECAR was shown to effectively reduce 5… more
Date: January 1, 2009
Creator: Addy, Susan Amrose
Partner: UNT Libraries Government Documents Department
open access

Measurement of the B/s0 lifetime in B/s0 --> K+ K- decays

Description: A method is presented to simultaneously separate the contributions to a sample of B{sub (s)}{sup 0} {yields} h{sup +}h{sup {prime}-} decays, where h = {pi} or K, and measure the B meson lifetimes in the sample while correcting for the bias in the lifetime distributions due to the hadronic trigger at the CDF experiment. Using 1 fb{sup -1} of data collected at CDF the B{sup 0} lifetime is measured as {tau}{sub B{sup 0}} = 1.558{sub -0.047}{sup +0.050}{sub stat} {+-} 0.028{sub syst} ps, in agreeme… more
Date: February 1, 2009
Creator: Pounder, Nicola Louise
Partner: UNT Libraries Government Documents Department
open access

Radiative B Meson Decay as a Probe of Physics Beyond the Standard Model: Time-Dependent CP Violation in B0 --> KS pi0 gamma and the B --> phi K gamma Branching Fraction

Description: The author presents measurements of radiative B meson decays to the final states K{sub s}{sup 0}{pi}{sup 0}{gamma} and K{phi}{gamma} based on data collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} collider at SLAC. In a data sample of 467 million B{bar B} pairs, the time-dependent CP asymmetry in B{sup 0} {yields} K{sub s}{sup 0}{pi}{sup 0}{gamma} decays is measured in two regions of K{sub s}{sup 0}-{pi}{sup 0} invariant mass. In the K* region, 0.8 … more
Date: January 22, 2009
Creator: Tuggle, Joseph Marion, IV
Partner: UNT Libraries Government Documents Department
open access

Design of a rural water provision system to decrease arsenic exposure in Bangladesh

Description: Researchers at the Lawrence Berkeley National Laboratory have invented ARUBA (Arsenic Removal Using Bottom Ash) a material that effectively and affordably removes high concentrations of arsenic from contaminated groundwater. The technology is cost-effective because the substrate?bottom ash from coal fired power plants?is a waste material readily available in South Asia. During fieldwork in four sub-districts ofBangladesh, ARUBA reduced groundwater arsenic concentrations as high as 680 ppb to be… more
Date: January 7, 2009
Creator: Mathieu, Johanna
Partner: UNT Libraries Government Documents Department
open access

The Willingness of Older Adults to Evacuate in the Event of a Disaster

Description: The issue of rising number of disasters, the overwhelming increase in number of older adults, and historically flawed evacuations presents real challenges. Disasters can strike anywhere, any time, and have devastating consequences. Since 1900, the number of Americans 65 and older has increased 12 times (from 3.1 million to 36.3 million). During the next two decades, the number of American baby boomers, now aged 45-64, who turn 65, will increase by 40%. As evidenced by recent disasters, the impe… more
Date: May 2009
Creator: Gray-Graves, Amy Michael
Partner: UNT Libraries
open access

School Resource Allocation in Texas Public Schools: Study of High-Poverty, High Performing Schools and High-Poverty, Low Performing Schools

Description: The purpose of this study was to examine the relationship between resource allocation practices in specific categorical functions and student performance in reading and math. This study utilized quantitative research methods to study the effects of spending and performance over four years of analysis. Quantitative data was acquired utilizing information from the Texas Education Agency. The data was collected from 81 campuses and represented over 1,500 students. The study's outcomes reported th… more
Date: May 2009
Creator: Gibson, Greg
Partner: UNT Libraries
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