Partner
Collection
Texas Digital Newspaper Program
1,178
The Greensheet
936
UNT Theses and Dissertations
419
UNT Scholarly Works
92
Texas Borderlands Newspaper Collection
52
Hudspeth County Area Newspaper Collection
52
Texas Jewish Herald /Jewish Herald /Jewish Herald-Voice
52
The Suburbia News
52
Tocker Foundation Grant
52
Texas Jewish Post
37
22 More
Serial/Series Title
The Greensheet
936
Hudspeth County Herald and Dell Valley Review
52
Suburbia News
52
The Jewish Herald-Voice
52
The Texas Jewish Post
37
Yorktown News-View
27
Journal of Near-Death Studies
23
International Association of Panoramic Photographers e-Monitor
12
South Texas Catholic
11
JNDS, Volume 29, Number 4
10
25 More
Degree Department
Libraries
48
Department of Psychology
45
College of Music
42
Digital Projects Unit
35
Department of History
26
Department of Counseling and Higher Education
24
Department of Teacher Education and Administration
23
Department of Biological Sciences
20
Department of Chemistry
17
Department of English
16
69 More
Degree Discipline
Degree Level
States
Year
Month
Language
Texas High School Principals' Attitudes Toward the Inclusion of Students with Disabilities in the General Education Classroom
This study examined Texas high school principals' attitudes toward the inclusion of students with disabilities in the general education classroom. School leaders today face increasing demands with the revised state accountability system. For example, students with disabilities are required to take the Texas Assessment Knowledge and Skills Test (TAKS) and on grade level. Hence, one of the strategies of schools has been to mainstream or include special education students in the regular classroom. Inclusion provides the opportunity for students with disabilities to be educated in the general education curriculum with their non-disabled peers. This study investigated the attitudes of Texas high school principals' attitudes toward the inclusion of students with disabilities in the general education classroom. The principals' personal experiences, professional training, and formal training in inclusion were examined. This study was a qualitative study using survey methodology. The Principal's Inclusion Survey developed by Cindy Praisner and G.H. Stainback was distributed electronically to 1211 Texas high schools. With the permissions of Praisner and Stainback, the survey was loaded into Survey Monkey, which is a website for creation of professional online surveys. Data was analyzed using descriptive statistics. The return rate was 395 (32.1%) overall responses. The results of the study …
Date:
May 2011
Creator:
Farris, Troy K.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Processing Instruction and Teaching Proficiency Through Reading and Storytelling: A Study of Input in the Second Language Classroom
This paper reports a study of VanPatten's processing instruction (PI) and Ray's TPRS. High school students in a beginning Spanish course were divided into three groups (PI, TPRS, and control) and instructed in forms using the Spanish verb gustar. Treatment included sentence-level and discourse-level input, and tests included interpretation and production measures in a pretest, an immediate posttest, and a delayed posttest given two and a half months following treatment. The PI group made the greatest gains in production measures and in a grammaticality judgment test, and the TPRS group made the greatest gains in written fluency. The PI group's statistical gains in production measures held through the delayed posttest.
Date:
May 2011
Creator:
Foster, Sarah Jenne
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Geologic and Lithic Analysis of the Red River Cache
The Red River Cache is an assemblage of 33 bifaces, found in Cooke County, along Cache Creek, a tributary to the Red River. Also found with the cache was a hearth which yielded charcoal for AMS dating which returned an age of 2770- 2710 Cal YBP placing the cache in the Late Archaic. The geologic investigation of Cache Creek established 3 Holocene allostratigraphic units that provide information depositional environments adjacent to the Red River. Lithic analysis explored the production of bifaces during the Late Archaic and compared the cache to regional records. Using both geologic and lithic analysis this thesis investigates the temporal and cultural context of the cache using a geoarchaeological approach.
Date:
May 2011
Creator:
Gregory, Brittney
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Development of an Analytical Microwave Electromagnetic Pulse Transmission Probe and Preliminary Test Results
Within this educational endeavor instrumental development was explored through the investigation of microwave induce stable electromagnetic waves within a non-linear yttrium iron garnet ferromagnetic waveguide. The resulting magnetostatic surface waves were investigated as a possible method of rapid analytical evaluation of material composition. Initial analytical results indicate that the interaction seen between wave and material electric and magnetic fields will allow phase coherence recovery andanalysis leading to enhancement of analytical value. The ferromagnetic waveguide selected for this research was a high quality monocrystalline YIG (yttrium iron garnet) film. Magnetostatic spin waves (MSW) were produced within the YIG thin waveguide. Spin waves with desired character were used to analytically scan materials within the liquid and solid phase.
Date:
May 2011
Creator:
Griffith, William Francis
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Investigating Molecular Structures: Rapidly Examining Molecular Fingerprints Through Fast Passage Broadband Fourier Transform Microwave Spectroscopy
Microwave spectroscopy is a gas phase technique typically geared toward measuring the rotational transitions of Molecules. The information contained in this type of spectroscopy pertains to a molecules structure, both geometric and electronic, which give insight into a molecule's chemistry. Typically this type of spectroscopy is high resolution, but narrowband ≤1 MHz in frequency. This is achieved by tuning a cavity, exciting a molecule with electromagnetic radiation in the microwave region, turning the electromagnetic radiation o, and measuring a signal from the molecular relaxation in the form of a free induction decay (FID). The FID is then Fourier transformed to give a frequency of the transition. "Fast passage" is defined as a sweeping of frequencies through a transition at a time much shorter (≤10 s) than the molecular relaxation (≈100 s). Recent advancements in technology have allowed for the creation of these fast frequency sweeps, known as "chirps", which allow for broadband capabilities. This work presents the design, construction, and implementation of one such novel, high-resolution microwave spectrometer with broadband capabilities. The manuscript also provides the theory, technique, and motivations behind building of such an instrument. In this manuscript it is demonstrated that, although a gas phase technique, solids, liquids, …
Date:
May 2011
Creator:
Grubbs, Garry Smith, II
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Synthesis and Characterization of Copper Releasing Polymer Nanoparticles
Polymeric nanoparticles were synthesized and loaded with Cu²⁺ to explore the therapeutic potential for catically active transition metal ions and complexes other than cisplatin. Two types of nanoparticles were synthesized to show the potential for polymer based vectors. Copper loading and release were characterized via inductively coupled plasma mass spectrometry (ICP MS), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and elemental analysis. Results demonstrated that Cu could be loaded to the nano-sized carriers in an aqueous environment, and that the release was pH-dependent. The toxicity of these particles was measured in HeLa cells where significant toxicity was observed in vitro via dosing of high Cu-loaded nanoparticles. No significant toxicity was observed in cells dosed with Cu-free nanoparticles.
Date:
May 2011
Creator:
Harris, Alesha N.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Nihilism and the Formulation of a Philosophy of Art
Nihilism is often associated with feelings of despair, hopelessness and meaningless. It is certainly true that once the implications of this philosophy become apparent that these feelings are valid. However, this reaction is merely the first stage of dealing with nihilism and stopping here fails to examine the various types of nihilism that deal specifically with knowledge, ethics, metaphysics, truth, and art. Nihilism at its base is a philosophy that recognizes the history of human thought and what it means to be and to think. My focus is the way in which a completed nihilism is in fact an emancipatory act and the implications it has for art and the artist in the 21st century.
Date:
May 2011
Creator:
Hernandez, Brian
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Exploratory Study of Students' Use of Facebook and Other Communication Modalities in Order to Receive Student Affairs Information
This qualitative study explored Facebook as a communication tool for student affairs and compared it as a source with other communication modalities to describe the 18-24 year old student preference on receiving information about student affairs departments and activities. The research questions were designed to provide feedback on the current purpose[s] of student use of Facebook for student affairs services as well as reporting additional services and activities that would be considered through the use of Facebook. Differences in use among institutional types were also explored. The results of 395 online survey responses were compared to focus groups consisting of student ambassadors at a two-year public, four-year private, and four-year public institution. The online survey participants were asked to respond to specific modes of communication based upon each service or activity. The focus groups were asked the same questions in an open-ended format and the results were compared to the online results. The results indicate that depending on the event or activity, the students preferred a different method of communication, not necessarily Facebook for information on student affairs programming. These results also differed among institutional types. Two-year institutions have the greatest potential to increase their presence on Facebook. One theme …
Date:
May 2011
Creator:
Huppe, Alicia
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Characterization of Novel Solvents and Absorbents for Chemical Separations
Predictive methods have been employed to characterize chemical separation mediums including solvents and absorbents. These studies included creating Abraham solvation parameter models for room-temperature ionic liquids (RTILs) utilizing novel ion-specific and group contribution methodologies, polydimethyl siloxane (PDMS) utilizing standard methodology, and the micelles cetyltrimethylammonium bromide (CTAB) and sodium dodecylsulfate (SDS) utilizing a combined experimental setup methodology with indicator variables. These predictive models allows for the characterization of both standard and new chemicals for use in chemical separations including gas chromatography (GC), solid phase microextraction (SPME), and micellar electrokinetic chromatography (MEKC). Gas-to-RTIL and water-to-RTIL predictive models were created with a standard deviation of 0.112 and 0.139 log units, respectively, for the ion-specific model and with a standard deviation of 0.155 and 0.177 log units, respectively, for the group contribution fragment method. Enthalpy of solvation for solutes dissolved into ionic liquids predictive models were created with ion-specific coefficients to within standard deviations of 1.7 kJ/mol. These models allow for the characterization of studied ionic liquids as well as prediction of solute-solvent properties of previously unstudied ionic liquids. Predictive models were created for the logarithm of solute's gas-to-fiber sorption and water-to-fiber sorption coefficient for polydimethyl siloxane for wet and dry conditions. These models …
Date:
May 2011
Creator:
Grubbs, Laura Michelle Sprunger
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Unmaking Progress: Individual and Social Teleology in Victorian Children's Fiction
This study contrasts four distinct discursive responses to (or even accidental remarks on) the Victorian concept of individual and/or social improvement, or progress, set forth by the preeminent social critics, writers, scientists, and historians of the nineteenth century, such as Thomas Carlyle, John Stuart Mill, Thomas Macaulay Matthew Arnold, Charles Darwin, and Herbert Spencer. This teleological ideal, perhaps the most prevalent ideology of the long nineteenth century, originates with the Protestant Christian ethic during and in the years following the Reformation, whereupon it combines with the Enlightenment notions of rational humanity's boundless potential and Romanticism's fierce individualism to create the Victorian doctrine of progress. My contention remains throughout that four nineteenth-century writers for children and adults subvert the doctrine of individual progress (which contributes to the progress of the race) by chipping away at its metaphysical and narratalogical roots. George MacDonald allows progress only on the condition of total selflessness, including the complete dissolution of one's free will, but defers the hallmarks of making progress indefinitely, due to his apocalyptic Christian vision. Lewis Carroll ridicules the notion of progress by playing with our conceptions of linear time and simple causality, implying as he writes that perhaps there is nothing to …
Date:
May 2011
Creator:
Jones, Justin T.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Faculty Research Productivity at Addis Ababa University
This study explores the research productivity of Addis Ababa University (AAU) faculty. AAU was established in 1950 and is the oldest modern higher educational institution in Ethiopia. Recently AAU took steps to transform itself to become a pre-eminent African research university. One of the characteristics of a research university is the focus on the amount of research conducted by the institution's faculty. Academic institutions measure research productivity primarily based on published work. The purpose of this study was to analyze the research productivity of AAU faculty, and to examine the differential predictive effects of individual and environmental variables on faculty research productivity. This quantitative study used a theoretical framework and instrument, Faculty at Work. Four hundred questionnaires were distributed to Addis AAU faculty in person and 298 questionnaires were returned resulting in a 74.5% response rate. After exclusion of 12 cases with missing information, 286 cases (71.5% response rate) were analyzed. Most of the respondents were men (M = 92.1%, F = 7.9%). The average age of AAU faculty was 44. A hierarchical multiple regression was used to examine the ability of six sets of independent variables (sociodemographic, career, self-knowledge, social knowledge, behavior, and environmental response) to predict research productivity …
Date:
May 2011
Creator:
Stafford, Mehary T.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Sheltered Instruction: A Case Study of Three High School English Teachers' Experiences with the SIOP Model
The purpose of this study was to determine the current status of secondary teachers' implementation of the sheltered instruction operational protocol (SIOP) model and its effect on Hispanic English language learners' (ELL) English language proficiency and academic achievement. In addition, this study sought to determine whether teachers perceive the SIOP model as an effective tool for instruction of high school ELL students to increase English language content and English language proficiency. This study employed qualitative and quantitative methodologies. Data were collected from four sources: Hispanic ELLs' English language proficiency scores, students' English Language Arts scores, an oral interview with participating teachers and teacher observations. Each teacher was observed at four points during the school year with the SIOP instrument. Quantitative data on student achievement were collected employing a pre-experimental, one-group pretest-post-test design. Qualitative data were collected using a time-series design. Findings revealed that on the two student assessment measures there were increases in English proficiency and English language arts achievement among the Hispanic ELLs. On the assessment of English language proficiency, the students of the teacher with the highest level of SIOP implementation made the highest gains; the students of the teacher with the second highest SIOP implementation level made …
Date:
May 2011
Creator:
Bertram, Rodney L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Recommended Modified zone Method Correction Factor for Determining R-values of Cold-Formed Steel Wall Assemblies
Currently, ASHRAE has determined the zone method and modified zone method are appropriate calculation methods for materials with a high difference in conductivity, such as cold-formed steel (CFS) walls. Because there is currently no standard U-Factor calculation method for CFS walls, designers and code officials alike tend to resort to the zone method. However, the zone method is restricted to larger span assemblies because the zone factor coefficient is 2.0. This tends to overestimate the amount of surface area influenced by CFS. The modified zone method is restricted to C-shaped stud, clear wall assemblies with framing factors between 9 and 15%. The objective of the research is to narrow the gap of knowledge by re-examining the modified zone method in order to more accurately determine R-Values and U-Factors for CFS wall assemblies with whole wall framing factor percentages of 22% and above.
Date:
May 2011
Creator:
Black, John
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Spatial Ability, Motivation, and Attitude of Students as Related to Science Achievement
Understanding student achievement in science is important as there is an increasing reliance of the U.S. economy on math, science, and technology-related fields despite the declining number of youth seeking college degrees and careers in math and science. A series of structural equation models were tested using the scores from a statewide science exam for 276 students from a suburban north Texas public school district at the end of their 5th grade year and the latent variables of spatial ability, motivation to learn science and science-related attitude. Spatial ability was tested as a mediating variable on motivation and attitude; however, while spatial ability had statistically significant regression coefficients with motivation and attitude, spatial ability was found to be the sole statistically significant predictor of science achievement for these students explaining 23.1% of the variance in science scores.
Date:
May 2011
Creator:
Bolen, Judy Ann
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Jacques-Antoine-Hippolyte, comte de Guibert: Father of the Grande Armée
The eighteenth century was a time of intense upheaval in France. The death of Louis XIV in 1715 and the subsequent reign of Louis XV saw the end of French political and martial hegemony on the continent. While French culture and language remained dominant in Europe, Louis XV's disinterested rule and military stagnation led to the disastrous defeat of the French army at the hands of Frederick the Great of Prussia in the Seven Years War (1756-1763). The battle of Rossbach marked the nadir of the French army in the Seven Years War. Frederick's army routed the French infantry that had bumbled its way into massed Prussian cavalry. Following the war, two reformist elements emerged in the army. Reformers within the government, chiefly Etienne François, duc de Choiseul, sought to rectify the army's poor performance and reconstitute France's military establishment. Outside the traditional army structure, military thinkers looked to military theory to reinvigorate the army from within and without. Foremost among the latter was a young officer named Jacques-Antoine-Hippolyte de Guibert, whose 1772 Essai général de tactique quickly became the most celebrated work of theory in European military circles. The Essai provided a new military constitution for France, proposing wholesale …
Date:
May 2011
Creator:
Abel, Jonathan, 1985-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Relationship Between Supplemental Instruction Leader Learning Style and Study Session Design
The purpose of this qualitative study was to examine the learning styles of supplemental instruction leaders at a large, public university during the fall 2010 semester and determine whether or not their personal learning styles influenced the way they designed and developed out-of-class study sessions. The total population of supplemental instruction leaders was 37, of which 24 were eligible to participate in the study. Of the 24 eligible supplemental instruction leaders, 20 completed the entire study. Participants in the study included nine male and 11 female supplemental instruction leaders with a median age of 22.25 years-old. Seventeen participants indicated their classification as senior, two as junior, and one as sophomore. Of the participants, 16 indicated white as a race or ethnicity, one indicated Asian, two indicated African American, and one indicated both American Indian/Alaska Native and white. Supplemental instruction leader learning style was assessed using the Kolb Learning Style Inventory. Leaders were then interviewed, and their study sessions were analyzed. Through triangulation of data from learning style, interviews and actual study session documents, four major themes emerged. The four themes were: 1) incorporation of personal experience into study session design, 2) the sense of impact on student learning, 3) a …
Date:
May 2011
Creator:
Adams, Joshua
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Solvent Effects and Bioconcentration Patterns of Antimicrobial Compounds in Wetland Plants
This study looked at effects of organic solvents dimethylsulfoxide, dimethylformamide and acetone at 0.01%, 0.05% and 0.1% concentration on germination and seedling development wetland plants. Even at 0.01% level, all solvents affected some aspect of seed germination or seedling growth. Acetone at 0.01% was least toxic. Root morphological characteristics were most sensitive compared to shoot morphological characteristics. This study also looked at bioconcentration patterns of antimicrobial compounds triclosan, triclocarban and methyl-triclosan in wetland plants exposed to Denton Municipal Waste Water Treatment Plant effluent. Bioconcentration patterns of antimicrobial compounds varied among species within groups as well as within organs of species. The highest triclocarban, triclosan and methyltriclosan concentration were in shoot of N. guadalupensis, root of N. lutea and in shoots of P. nodous respectively.
Date:
May 2011
Creator:
Adhikari, Sajag
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Significance of Feudal Law in Thirteenth-Century Law Codes
Although developments in feudal law in the thirteenth century influenced the legal environment of Europe for centuries, much of past and current historical research of feudalism examines the social system anthropologically but neglects an in-depth analysis of feudal law codes. My research combines the social-anthropological approach with relevant customary codes to demonstrate the importance of feudal law to a thirteenth-century society plagued by war, economic and social instability, and competing powers of the monarchy, judiciary, and religion. The assessment of feudal law within each legal code highlights its prominence as an accepted category of jurisprudence. This thesis provides a new perspective on the influence of feudalism in the thirteenth century, demonstrating the significance of feudal law as a mode of maintaining peace and prolonging land tenure.
Date:
May 2011
Creator:
Sijansky, Adam Wayne
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Mechanisms of Ordered Gamma Prime Precipitation in Nickel Base Superalloys
Commercial superalloys like Rene88DT are used in high temperature applications like turbine disk in aircraft jet engines due to their excellent high temperature properties, including strength, ductility, improved fracture toughness, fatigue resistance, enhanced creep and oxidation resistance. Typically this alloy's microstructure has L12-ordered precipitates dispersed in disordered face-centered cubic γ matrix. A typical industrially relevant heat-treatment often leads to the formation of multiple size ranges of γ¢ precipitates presumably arising from multiple nucleation bursts during the continuous cooling process. The morphology and distribution of these γ′ precipitates inside γ matrix influences the mechanical properties of these materials. Therefore, the study of thermodynamic and kinetic factors influencing the evolution of these precipitates and subsequent effects is both relevant for commercial applications as well as for a fundamental understanding of the underlying phase transformations. The present research is primarily focused on understanding the mechanism of formation of different generations of γ′ precipitates during continuous cooling by coupling scanning electron microscopy (SEM), energy filtered TEM and atom probe tomography (APT). In addition, the phase transformations leading to nucleation of γ′ phase has been a topic of controversy for decades. The present work, for the first time, gives a novel insight into the mechanism …
Date:
May 2011
Creator:
Singh, Antariksh Rao Pratap
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Portrait of a southern Progressive: The political life and times of Governor Pat M. Neff of Texas, 1871-1952
Pat M. Neff was a product of his political place and time. Born in Texas in 1871, during Reconstruction, he matured and prospered while his native state did the same as it transitioned from Old South to New South. Neff spent most of his life in Waco, a town that combined New South Progressivism with religious conservatism. This duality was reflected in Neff's own personality. On moral or religious issues, he was conservative. On economic and social issues, he was Progressive. He thus was a typical Southern Progressive who de-emphasized social and political change in favor of economic development. For instance, as governor from 1921 to 1925, his work to develop and conserve Texas' water resources brought urbanization and industrialization that made the New South a reality in the state. Neff was a devout Baptist which influenced his politics and philosophy. He was president of Baylor University, a Baptist institution, for fifteen years after leaving the governor s office and he led the Southern Baptist Convention (SBC) in the 1940s. He combined Progressive and Christian values as he argued for the establishment of the United Nations and advocated forgiveness and brotherhood after World War II. The war's end marked the …
Date:
May 2011
Creator:
Stanley, Mark
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Mosques in France: The Visible Presence of Islam
Numerous laws are being directed toward subduing the visible presence of Islam throughout France, and in return French Muslims are becoming bolder in the projection of their faith. This thesis examines the presence of Islam in France throughout history and in contemporary French civilization. Specifically, this thesis addresses the issues regarding the visible presence of Islam in France through such institutions as mosques and how they are the key symbols representing the prominence of Islam in France. It looks at what lies in the collective French mind that creates such an influence on today's policies and outlook, as well as identifies the key characters that dominate the current affairs surrounding Islam in France. The thesis reviews the country's past relations with the visible presence of Islam through the controversies surrounding the construction of famous mosques. In addition, this thesis underlines key areas where both the State and the Muslim population must make concessions in order to avoid further conflict.
Date:
May 2011
Creator:
Arnold, Ashley Patricia
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Miscegenated Narration: The Effects of Interracialism in Women's Popular Sentimental Romances from the Civil War Years
Critical work on popular American women's fiction still has not reckoned adequately with the themes of interracialism present in these novels and with interracialism's bearing on the sentimental. This thesis considers an often overlooked body of women's popular sentimental fiction, published from 1860-1865, which is interested in themes of interracial romance or reproduction, in order to provide a fuller picture of the impact that the intersection of interracialism and sentimentalism has had on American identity. By examining the literary strategy of "miscegenated narration," or the heteroglossic cacophony of narrative voices and ideological viewpoints that interracialism produces in a narrative, I argue that the hegemonic ideologies of the sentimental romance are both "deterritorialized" and "reterritorialized," a conflicted impulse that characterizes both nineteenth-century sentimental, interracial romances and the broader project of critiquing the dominant national narrative that these novels undertake.
Date:
May 2011
Creator:
Beeler, Connie
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Re-Branding Palliative Care: Assessing Effects of a Name Change on Physician Communicative Processes During Referrals
Although provision of palliative care on the United States is growing, referrals to the service are often late or non-existent. The simultaneous care model provides a blueprint for the most progressive form of palliative care, which is palliation and disease-oriented treatments delivered concurrently. Research indicates the existence of a widespread misconception that associates palliative care with imminent death, and some organizations have chosen to re-brand their palliative care services to influence this perception. The goal of this study was to assess the effects of a name change from palliative care to supportive care on the communicative process during referrals to the service.
Date:
May 2011
Creator:
Burt, Stephanie
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Thorium and Uranium M-shell X-ray Production Cross Sections for 0.4 – 4.0 MeV Protons, 0.4 - 6.0 MeV Helium Ions, 4.5 – 11.3 MeV Carbon Ions, and 4.5 – 13.5 MeV Oxygen Ions.
The M-shell x-ray production cross section for thorium and uranium have been determined for protons of energy 0.4 - 4.0 MeV, helium ions of energy 0.4 - 6.0 MeV, carbon ions of energy 4.5 - 11.3 MeV and oxygen ions of energy 4.5 - 13.5 MeV. The total cross sections and the cross sections for individual x-ray peaks in the spectrum, consisting of the following transitions Mz (M4-N2, M5-N3, M4-N3), Ma (M5-N6,7), Mb (M4-N6, M5-O3, M4- O2), and Mg (M4-O3, M5-P3, M3-N4, M3-N5), were compared to the theoretical values determined from the PWBA + OBKN and ECUSAR. The theoretical values for the carbon and oxygen ions were also modified to take into account the effects of multiple ionizations of the target atom by the heavier ions. It is shown that the results of the ECUSAR theory tend to provide better agreement with the experimental data.
Date:
May 2011
Creator:
Phinney, Lucas C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library