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Latino success stories in higher education: A qualitative study of recent graduates from a health science center.

Latino success stories in higher education: A qualitative study of recent graduates from a health science center.

Date: May 2007
Creator: Colley, Kay Lynne
Description: This study used qualitative research, particularly life history analysis, to determine the personal pathways of success for Latino students who chose to enter a health science center for graduate study and who graduated. By giving voice to individual success stories of Latino students, some of the influences on the life pathways of these graduates were determined. For the purposes of this study, success was defined as graduation from a health science center with either a doctor of philosophy, doctor of public health or doctor of osteopathic medicine degree. Four research subjects agreed to participate in this study from a possible 11 students from the graduating class of 2004-2005 at this health science center. Data were gathered through multiple in-depth interviews of the students themselves over a period of no more than one month for each participant. Data were analyzed using the mind mapping technique and Padilla's unfolding matrix. Findings indicate that each participant traveled a different pathway to achieve educational success although similarities did exist across participants. The influences of family background, cultural background, educational background and personal perceptions and goals did affect the pathways of these four Latino graduates. While three of four participants indicated that family was the ...
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Lattices

Lattices

Date: August 1966
Creator: Rintala, Richard Arne
Description: Because lattice theory is so vast, the primary purpose of this paper will be to present some of the general properties of lattices, exhibit examples of lattices, and discuss the properties of distributive and modular lattices.
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The Launching of an Accelerated School: A Case Study

The Launching of an Accelerated School: A Case Study

Date: May 1995
Creator: Montgomery, Alcynthia R. (Alcynthia Rose)
Description: The purpose of this qualitative study was to explore the readiness, planning, training and implementation stages of staff development in the implementation of the Accelerated Schools Program in a suburban elementary school. The research questions focused on how the school became interested in the accelerated program; the steps that were taken to make the school ready to accept the program; the training made available to the staff, parents and students; how teacher approval and acceptance were achieved; and how the implementation was initiated and to what degree.
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The law and human rights: is the law a mere parchment barrier to human rights abuse?

The law and human rights: is the law a mere parchment barrier to human rights abuse?

Date: December 1999
Creator: Keith, Linda Camp
Description: This study is the first systematic global analysis of the impact of law on human rights, analyzing the impact of twenty-three constitution provisions and an international covenant on three measures of human rights behavior, over the period of 1976-1996. Three sets of constitutional provisions are analyzed, including 1) ten provisions for individual freedoms and due process rights, 2) nine provisions for elements of judicial independence and 3) four provisions that outline procedures for states of emergency. Additionally, the impact of the International Covenant on Civil and Political Rights on actual human rights behavior is analyzed. Each of these areas of law are evaluated individually, in multiple models in which different elements vary. For example, some models control for democracy with different measures, others divide the data into the Cold War and post-Cold War eras, and some test constitutional indices. Finally, all provisions are simultaneously analyzed in integrated models. Provisions for fair and public trials are consistently shown to decrease the probability of abuse. An index of four freedoms (speech, religion, association, and assembly) decreases the probability of abuse somewhat consistently. Three of the provisions for judicial independence are most consistent in reducing the probability of abuse: the provisions for exclusive ...
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The Law Concerning Trade Regulations Prio to the Twentieth Century

The Law Concerning Trade Regulations Prio to the Twentieth Century

Date: August 1963
Creator: Brabham, Billy J.
Description: This thesis discusses trade regulations throughout history.
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Lawrence Weiner's Concerto for Guitar and Orchestra: Analysis and Performance Considerations

Lawrence Weiner's Concerto for Guitar and Orchestra: Analysis and Performance Considerations

Date: August 2005
Creator: Tan, Wann-Dar
Description: The purpose of this dissertation is to provide an introduction to the composer, Lawrence Weiner, and to his Concerto for Guitar and Orchestra, one of the many neglected guitar concerti that merits closer study and more frequent performances. Weiner, a prolific and prominent composer in the South Texas region, composed the concerto in 1986. The concerto was never published. This dissertation is the first attempt to study Weiner's Concerto for Guitar and Orchestra to date. This study provides insight into the compositional style of Weiner, and the understanding and performing of this work. The compositional language of this concerto is examined through an analysis of the aspects of form, harmonic/tonal scheme and thematic development. A performance edition and suggestions that are approved by the composer are also presented.
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Layered Double Hydroxides and the Origins of Life on Earth

Layered Double Hydroxides and the Origins of Life on Earth

Access: Use of this item is restricted to the UNT Community.
Date: May 2001
Creator: Brister, Brian
Description: A brief introduction to the current state of research in the Origins of Life field is given in Part I of this work. Part II covers original research performed by the author and co-workers. Layered Double Hydroxide (LDH) systems are anion-exchanging clays that have the general formula M(II)xM(III)(OH)(2x+2)Y, where M(II) and M(III) are any divalent and trivalent metals, respectively. Y can be nearly any anion, although modern naturally occuring LDH systems incorporate carbonate (CO32-), chloride (Cl-), or sulfate (SO42-) anions. Intercalated cobalticyanide anion shows a small yet observable deviation from local Oh symmetry causing small differences between its oriented and non-oriented infrared spectra. Nitroprusside is shown to intercalate into 2:1 Mg:Al LDH with decomposition to form intercalated ferrocyanide and nitrosyl groups of an unidentified nature. The [Ru(CN)6]4- anion is shown to intercalate into layered double hydroxides in the same manner as other hexacyano anions, such as ferrocyanide and cobalticyanide, with its three-fold rotational axis perpendicular to the hydroxide sheets. The square-planar tetracyano-nickelate(II), -palladate(II), and platinate(II) anions were intercalated into both 2:1 and 3:1 Mg:Al layered double hydroxides (LDH). The basal spacings in the 2:1 hosts are approximately 11 Å, indicating that the anions are inclined approximately 75 degrees relative to ...
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Layered Double Hydroxides as Anion- and Cation-Exchanging Materials

Layered Double Hydroxides as Anion- and Cation-Exchanging Materials

Date: May 2007
Creator: Richardson, Mickey Charles
Description: Layered double hydroxides (LDH) have been principally known as anion-exchanging, clay-like materials for several decades, and continues to be the main driving force for current and future research. The chemical interactions of LDH, with transition metallocyanides, have been a popular topic of investigation for many years, partly due to the use of powder x-ray diffraction and infrared spectroscopy as the main characterization tools. Each transition metallocyanide has a characteristic infrared stretching frequency that can be easily observed, and their respective sizes can be observed while intercalated within the interlayer of the LDH. The ability of LDH to incorporate metal cations or any ions/molecules/complexes, that have a postive charge, have not been previously investigated, mainly due to the chemical and physical nature of LDH. The possibility of cationic incorporation with LDH would most likely occur by surface adsorption, lattice metal replacement, or by intercalation into the LDH interlayers. Although infrared spectroscopy finds it main use through the identification of the anions incorporated with LDH, it can also be used to study and identify the various active and inactive bending and stretching modes that the metal hydroxide layers have.
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Layered Double Hydroxides: Morphology, Interlayer Anion, and the Origins of Life

Layered Double Hydroxides: Morphology, Interlayer Anion, and the Origins of Life

Access: Use of this item is restricted to the UNT Community.
Date: December 2002
Creator: Halcom-Yarberry, Faith Marie
Description: The preparation of layered double hydroxides via co-precipitation of a divalent/trivalent metal solution against a base results in 1 mm LDH particles with a disorganized metal lattice. Research was performed to address these morphological issues using techniques such as Ostwald ripening and precipitation via aluminate. Another interesting issue in layered double hydroxide materials is the uptake and orientation of anions into the interlayer. Questions about iron cyanide interlayer anions have been posed. Fourier transform infared spectroscopy and powder x-ray diffraction have been used to investigate these topics. It was found that factors such as orientation, anion charge, and anion structure depended on the divalent/trivalent metal ratio of the hydroxide layer and reactivity time. The cyanide self-addition reaction is an important reaction of classical prebiotic chemistry. This reaction has been shown to give rise to amino acids, purines and pyrimidines. At cyanide concentrations similar to that expected on the early earth, hydrolysis to formamide rather than self-addition occurs. One theory to alleviate this side reaction is the use of minerals or clays that are thought to concentrate and catalyze prebiotics of interest. Layered double hydroxides have been studied as a catalyst for this reaction.
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Layered Double Hydroxides: Synthesis, Characterization, and Interaction of Mg-Al Systems with Intercalated Tetracyanonickelate(II)

Layered Double Hydroxides: Synthesis, Characterization, and Interaction of Mg-Al Systems with Intercalated Tetracyanonickelate(II)

Date: August 2004
Creator: Brister, Fang Wei
Description: The square-planar tetracyanonickelate(II) anion was intercalated into 2:1 and 3:1 Mg-Al layered double hydroxide systems (LDHs). In the 2:1 material, the anion holds itself at an angle of about 30° to the layers, whereas in the 3:1 material it lies more or less parallel to the layers. This is confirmed by orientation effects in the infrared spectra of the intercalated materials and by X-ray diffraction (XRD) data. The measured basal spacings for the intercalated LDH hosts are approximately 11 Å for the 2:1 and approximately 8 Å for the 3:1. The IR of the 2:1 material shows a slight splitting in the ν(CN) peak, which is suppressed in that compound's oriented IR spectrum, indicating that at least some of the intercalated anion's polarization is along the z-axis. This effect is not seen in the 3:1 material. A comparison between chloride LDHs and nitrate LDHs was made with respect to intercalation of tetracyanonickelate(II) anions. Both XRD data and atomic absorption spectroscopy (AAS) data of the LDH tetracyanonickelates confirms that there are no significant differences between the products from the two types of starting materials. The presence of a weak ν(NO) peak in the IR spectra of those samples made from nitrate ...
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