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open access

Search for Higgs Boson Production in Association with the W boson in 1.96-TeV Proton-Antiproton Collisions

Description: A search for the Standard Model Higgs boson was carried out in WH {yields} {ell}{nu}b{bar b} process in p{bar p} collisions at a center of mass energy of 1.96 TeV, where W, H, {ell}, {nu}, b and p denote either a W{sup +} or W{sup -} boson, Higgs boson, lepton (electron or muon), neutrino, bottom quark and proton, respectively. The data were collected with the Collider Detector at Fermilab from February 2002 to August 2004. The corresponding integrated luminosity is 319 pb{sup -1}. We select ev… more
Date: September 1, 2005
Creator: Ishizawa, Yoshio
Partner: UNT Libraries Government Documents Department
open access

A Meaurement of the W+- production cross section in p anti-p collisions at sqroot(s)=1.96 TeV in the DiLepton channel and limits on anomalous WWZ/gamma couplings

Description: Measurements of the production cross section of W{sup +}W{sup -} pairs in p{bar p} collisions at 1.96 TeV and limits on trilinear gauge boson coupling (TGC) parameters are presented. The data were recorded with the CDF experiment at Tevatron during the 2001 and 2002 data taking periods in which a total integrated luminosity of 184 pb{sup -1} was collected. The data sample was filtered for events with two leptonic w boson decays where the charged leptons can be either electrons or muons. 17 even… more
Date: December 1, 2005
Creator: McGivern, Dustin & London, /University Coll.
Partner: UNT Libraries Government Documents Department
open access

A Parallel Ocean Model With Adaptive Mesh Refinement Capability For Global Ocean Prediction

Description: An ocean model with adaptive mesh refinement (AMR) capability is presented for simulating ocean circulation on decade time scales. The model closely resembles the LLNL ocean general circulation model with some components incorporated from other well known ocean models when appropriate. Spatial components are discretized using finite differences on a staggered grid where tracer and pressure variables are defined at cell centers and velocities at cell vertices (B-grid). Horizontal motion is model… more
Date: September 8, 2005
Creator: Herrnstein, A
Partner: UNT Libraries Government Documents Department
open access

Study of t anti-t production in tau jets channel at CDFII using neural networks

Description: CDF (Collider Detector at Fermilab) is a particle detector located at Fermi National Laboratories, near Chicago. it allows to study decay products of p{bar p} collisions at center-of-mass energy of 1.96 TeV. During its first period of data taking (RunI), CDF observed for the first time the top quark (1995). The current period of data taking (RunII) is devoted to precise measurements of top properties and to search for new physics. This thesis work is about the top decay channel named {tau} + je… more
Date: December 1, 2005
Creator: Amerio, Silvia
Partner: UNT Libraries Government Documents Department
open access

The Opinions of Spanish Women Concerning the Transition from the Dictatorship to the Democracy in Spain in 1975

Description: Thesis written by a student in the UNT Honors College discussing how women in Spain during the dictatorship of Francisco Franco viewed the dictator, how those women view their political positions today, how much their positions have changed, and how do they compare Franco's government with the current democracy.
Date: Autumn 2005
Creator: Church, Kellye
Partner: UNT Honors College
open access

Shaping Cows' Approach to Humans Using Positive and Negative Reinforcement

Description: Negative reinforcement can be a powerful tool for behavior analysts, yet it is often overlooked as a treatment method. Pryor (1999) outlines a method for approaching a "timid" animal using a combination of negative reinforcement and positive reinforcement. When the animal stands still, the human operates a clicker, and then retreats from the animal. Gradually, the human moves closer to the animal through the clicking and retreating shaping process. Once the human is standing close enough, food … more
Date: May 2005
Creator: Morehead, Melissa L.
Partner: UNT Libraries

The Effects of Timed Readings on Recall and Comprehension in a Child with Asperger's Syndrome.

Description: The effects of timed readings on recall and comprehension in a child with Asperger's syndrome were examined by employing a multiple-baseline design across two books with reversals. Recall timings consisted of the student's free-say compilation of what she just read. Comprehension tests consisted of the participant's answers to predetermined questions after her recall period. No consequences or feedback was given during any of the conditions. Results indicate that, initially, as the time req… more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: December 2005
Creator: Young, Christina A.
Partner: UNT Libraries
open access

The Effects of Two Types of Consequence Delivery on Task Acquisition.

Description: The effects of two consequence delivery methods on task acquisition were evaluated within a multi-element design. A typical 3 year-old child and a 4 year-old child with autism participated in this study. The task for both children was to select a picture after the experimenter said its name. The consequence in one condition consisted of the experimenter handing the edible item to the children. The consequence in the other condition consisted of the children retrieving the edible item directly f… more
Date: August 2005
Creator: Jenkins, Juliet
Partner: UNT Libraries
open access

Effects of Fluency and Accuracy-Only Training on Acquisition and Retention of Letter Naming by Individuals with Traumatic Brain Injury

Description: This study examines the effects of accuracy-only training and fluency training on retention of material learned. Two adolescent participants with traumatic brain injuries were taught to name 2 sets of lowercase Greek letters. Each of the 2 sets consisted of 7 letters. Practice and rate of reinforcement were controlled for in this study. Fluency trained letters showed higher retention (percent correct during retention checks) than the accuracy-only trained letters.
Date: August 2005
Creator: Ewing, Christopher Boyd
Partner: UNT Libraries
open access

Tracking to Pliance: Effects of Punishment on Non-Compliance

Description: Inaccurate instructions have been shown to interfere with or override the effects of otherwise effective behavioral contingencies. This effect may be mediated by such factors as the discriminability of current contingencies, histories with accurate and inaccurate instructions, and consequences associated with following instructions. The current experiment investigated the effects of instructions (both accurate and inaccurate) on response patterns when paired with feedback regarding corresponden… more
Date: August 2005
Creator: Harmon, D. Austin
Partner: UNT Libraries
open access

Teaching Two Children with Autism to Follow a Computer-Mediated Activity Schedule Utilizing Microsoft® PowerPoint® Presentation Software

Description: Children with autism typically exhibit deficits in behavior and also in visual processing. Development and implementation of visually-cued instructional procedures, combined with electronic technology, have been used successfully to teach children with autism complex behavior chains. This study used photographic activity schedules on computer slideshow software to teach two children with autism to follow computer-mediated cues and engage in four play activities, and to transition between each a… more
Date: August 2005
Creator: Carmichael, Tammy
Partner: UNT Libraries
open access

Evaluation of a Training Package for Teaching Social Skills in an Inclusionary Preschool Environment

Description: Effective training procedures are necessary when teaching behavior analytic techniques because the techniques are so complex and precise; and there is a correlation between the changed skills in the trainees to be beneficial to the client. Instructors who may previously exhibit effective teaching techniques in a one-to-one setting may not exhibit those techniques in an inclusive setting. This study examines the effects of a training package and an instruction on the performance of experienced … more
Date: August 2005
Creator: Haycraft, Carrie H.
Partner: UNT Libraries

Shaping: From art to science.

Description: This study evaluated the effectiveness of a procedure for teaching a caregiver to shape vocal language in a young child with autism. A multiple baseline design was employed to assess caregiver use of shaping procedures, child vocal language progress, and the social validity of the procedures. Following baseline and introductory sessions, the coach and caregiver reviewed video from the previous session and the coach gave descriptive feedback to the caregiver about her performance. Following the … more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: August 2005
Creator: Schooley, Kathryne Balch
Partner: UNT Libraries
open access

Effects of Concurrent Fixed Interval-fixed Ratio Schedules of Reinforcement on Human Responding.

Description: The present study contributes an apparatus and research paradigm useful in generating human performances sensitive to concurrent schedules of reinforcement. Five participants produced performances observed to be under temporal and ratio control of concurrent fixed interval-fixed ratio schedules. Two aspects of interaction between FI and FR schedules were distinguishable in the data. First, interaction between two schedules was observed in that changes in the value of one schedule affected behav… more
Date: August 2005
Creator: Parsons, Teresa Camille
Partner: UNT Libraries

Assessing Optimal Sibling Training Conditions: An Empirical Approach.

Description: The purpose of the study was to investigate the effects of play materials on the interactions between a child with autism and her sibling. Three conditions were assessed: open choice, materials chosen by the child with autism, and materials chosen by the typically developing sibling. Within each activity, measures of social interactions were assessed. Results of the assessment showed that more interactions occurred with a material chosen by the child with autism. After sibling training (tar… more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: August 2005
Creator: Merker, Stephanie K.
Partner: UNT Libraries
open access

Beam Diagnosis and Lattice Modeling of the Fermilab Booster

Description: A realistic lattice model is a fundamental basis for the operation of a synchrotron. In this study various beam-based measurements, including orbit response matrix (ORM) and BPM turn-by-turn data are used to verify and calibrate the lattice model of the Fermilab Booster. In the ORM study, despite the strong correlation between the gradient parameters of adjacent magnets which prevents a full determination of the model parameters, an equivalent lattice model is obtained by imposing appropriate c… more
Date: September 1, 2005
Creator: Huang, Xiaobiao
Partner: UNT Libraries Government Documents Department
open access

The Cryogenic Dark Matter Search and Background Rejection with Event Position Information

Description: Evidence from observational cosmology and astrophysics indicates that about one third of the universe is matter, but that the known baryonic matter only contributes to the universe at 4%. A large fraction of the universe is cold and non-baryonic matter, which has important role in the universe structure formation and its evolution. The leading candidate for the non-baryonic dark matter is Weakly Interacting Massive Particles (WIMPs), which naturally occurs in the supersymmetry theory in particl… more
Date: January 1, 2005
Creator: Wang, Gen-sheng & U., /Case Western Reserve
Partner: UNT Libraries Government Documents Department
open access

Measurements of the top - anti-top Production Cross Section at s**(1/2) = 1.96-TeV and Top Mass in the Dielectron Channel

Description: The first measurement of the top-antitop production cross section in proton-antiproton collisions at {radical}s = 1.96 TeV using 243 pb{sup -1} of data collected with the D0 detector at Fermilab is presented. In this analysis, only the dielectron final state is considered. Five events are observed, and 0.93 background events are expected. The measured cross section, after accounting for the expected branching ratio to the dielectron channel, is {sigma}{sub t{bar t}} = 14.9{sub -7.0}{sup +9.4}(s… more
Date: May 1, 2005
Creator: Kozminski, Joseph Francis
Partner: UNT Libraries Government Documents Department
open access

A Measurement of the Inclusive Z / gamma* --> mu+ mu- Cross-Section and Study of W and Z Events in proton - anti-proton Collisions at D0

Description: A measurement of the inclusive Z/{gamma}* {yields} {mu}{sup +}{mu}{sup -} cross section for M{sub {mu}{mu}} > 40 GeV at {radical}s = 1.96 TeV is presented. The measurement is performed using a data sample corresponding to an integrated luminosity of 147.7 pb{sup -1}, collected with the D0 detector at the Tevatron, Fermilab, between September 2002 and October 2003. A total of 14352 di-muon events are selected and a final result of {sigma}(Z/{gamma}*) = 327.8 {+-} 3.4(stat.) {+-} 8.4(syst.) {+… more
Date: February 1, 2005
Creator: Nurse, Emily L.
Partner: UNT Libraries Government Documents Department
open access

Measurements of the Top Quark Pair Production Cross Section in Lepton + Jets Final States using a Topological Multivariate Technique as well as Lifetime b-Tagging in Proton - Anti-proton Collisions at s**(1/2)=1.96 TeV with the D0 Detector at the Tevatron

Description: Two alternative measurements of the t{bar t} production cross section at {radical}s = 1.96 TeV in proton-antiproton collisions in the lepton+jets channel are presented. The t{bar t} production cross section is extracted by combining the kinematic event information in a multivariate discriminant. The measurement yields {sigma}{sub p{bar p} {yields} t{bar t} + x} = 5.13{sub -1.57}{sup +1.76}(stat){sub -1.10}{sup +0.96}(syst) {+-} 0.33 (lumi) pb in the muon+jets channel, using 229.1 pb{sup -1}, an… more
Date: January 1, 2005
Creator: Golling, Tobias F.
Partner: UNT Libraries Government Documents Department
open access

Dynamical Study of Guest-Host Orientational Interaction in LiquidCrystalline Materials

Description: Guest-host interaction has long been a subject of interest in many disciplines. Emphasis is often on how a small amount of guest substance could significantly affect the properties of a host material. This thesis describe our work in studying a guest-host effect where dye-doping of liquid crystalline materials greatly enhances the optical Kerr nonlinearity of the material. The dye molecules, upon excitation and via intermolecular interaction, provides an extra torque to reorient the host molecu… more
Date: December 20, 2005
Creator: Truong, Thai Viet
Partner: UNT Libraries Government Documents Department
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