Older Adults and Depression : the Relationships Between Distorted Thinking, Quality of Life and Depressive Themes

This study analyzed the relationships between depression, distorted thinking and quality of life in an elderly population. Ninety non-depressed and 72 depressed individuals were interviewed and administered 3 self report measures. The study results demonstrate that: (a) Those who reported greater numbers of cognitive distortions, reported lower quality of life than those who reported less cognitive distortions; (b) depressed individuals reported lower quality of life than non-depressed individuals; (c) depressed individuals endorsed more distorted thinking phrases than non-depressed individuals and (d) depressed individuals reported more subcategories of cognitive distortions than nondepressed individuals. The results of this study support the ideas that depressed older adults exhibit more distorted thinking and have a lower quality of life than the non-depressed

Anna Julia Cooper: A Quintessential Leader

This study is a leadership biography which provides, through the lens of Black feminist thought, an alternative view and understanding of the leadership of Black women. Specifically, this analysis highlights ways in which Black women, frequently not identified by the dominant society as leaders, have and can become leaders. Lessons are drawn from the life of Anna Julia Cooper that provides new insights in leadership that heretofore were not evident. Additionally, this research offers provocative recommendations that provide a different perspective of what leadership is among Black women and how that kind of leadership can inform the canon of leadership. Cooper’s voice in advocacy, education, community service, and involvement in the Black Women’s Club Movement are the major themes in which evidence of her leadership is defined. This leadership biography moves beyond the western hegemonic point of view and the more traditional ways of thinking about leadership, which narrowly identify effective leaders and ways of thinking about leadership development. The findings of this study propose an alternative view of leadership that calls attention to the following critical elements: 1. Black women carry the co-identifers, gender and race, which continue to be nearly nonexistent in leadership theories, discourse, and mainstream leadership literature. 2. The positivist view, as being the only legitimate knowledge claim, must continue to be challenged. 3. There is a need to correct and update our history, making it more inclusive of all human beings. This leadership biography centers on the notion that Cooper, as a quintessential leader, remains paradoxical. For the most part, she continues to be an unknown figure to most Americans, both Black and White. Yet, remnants of Cooper’s ideology and leadership are prolific. It is precisely this dissonance between Cooper the undervalued figure and Cooper the scholar/activist leader that is being analyzed in this study. Under severe adversities, her resistance, persistence, educational excellence as a student and teacher, and community service demonstrates her challenging path to leadership. Cooper’s activism and beliefs in racial and gender equality provides a strong example of quintessential leadership. The electronic version of this dissertation is at OhioLink ETD Center, www.ohiolink.edu/et

Strain-stress study of AlxGa1-xN/AlN heterostructures on c-plane sapphire and related optical properties

This work presents a systematic study of stress and strain of AlxGa1-xN/AlN with composition ranging from GaN to AlN, grown on a c-plane sapphire by metal-organic chemical vapor deposition, using synchrotron radiation high-resolution X-ray diffraction and reciprocal space mapping. The c-plane of the AlxGa1-xN epitaxial layers exhibits compressive strain, while the a-plane exhibits tensile strain. The biaxial stress and strain are found to increase with increasing Al composition, although the lattice mismatch between the AlxGa1-xN and the buffer layer AlN gets smaller. A reduction in the lateral coherence lengths and an increase in the edge and screw dislocations are seen as the AlxGa1-xN composition is varied from GaN to AlN, exhibiting a clear dependence of the crystal properties of AlxGa1-xN on the Al content. The bandgap of the epitaxial layers is slightly lower than predicted value due to a larger tensile strain effect on the a-axis compared to the compressive strain on the c-axis. Raman characteristics of the AlxGa1-xN samples exhibit a shift in the phonon peaks with the Al composition. The effect of strain is also discussed on the optical phonon energies of the epitaxial layers. The techniques discussed here can be used to study other similar materials.Comment: 14 pages, 5 figures, 2 table

The use of remote sensing in solving Florida's geological and coastal engineering problems

LANDSAT imagery and NASA high altitude color infrared (CIR) photography were used to select suitable sites for sanitary landfill in Volusia County, Florida and to develop techniques for preventing sand deposits in the Clearwater inlet. Activities described include the acquisition of imagery, its analysis by the IMAGE 100 system, conventional photointerpretation, evaluation of existing data sources (vegetation, soil, and ground water maps), site investigations for ground truth, and preparation of displays for reports

High-precision epsilon expansions of single-mass-scale four-loop vacuum bubbles

In this article we present a high-precision evaluation of the expansions in \e=(4-d)/2 of (up to) four-loop scalar vacuum master integrals, using the method of difference equations developed by S. Laporta. We cover the complete set of `QED-type' master integrals, i.e. those with a single mass scale only (i.e. $m_i\in\{0,m\}$) and an even number of massive lines at each vertex. Furthermore, we collect all that is known analytically about four-loop `QED-type' masters, as well as about {\em all} single-mass-scale vacuum integrals at one-, two- and three-loop order.Comment: 25 pages, uses axodraw.st

Direct evidence for an early reionization of the Universe?

We examine the possible reionization of the intergalactic medium (IGM) by the source UDF033238.7-274839.8 (hereafter HUDF-JD2), which was discovered in deep {\it HST}/VLT/{\it Spitzer} images obtained as part of the Great Observatory Origins Deep Survey and {\it Hubble} Ultra-Deep Field projects. Mobasher et al (2005) have identified HUDF-JD2 as a massive ($\sim6\times10^{11}M_\odot$) post-starburst galaxy at redshift z$\gtrsim6.5$. We find that HUDF-JD2 may be capable of reionizing its surrounding region of the Universe, starting the process at a redshift as high as z$\approx 15 \pm5$.Comment: 6 pages, 2 figures. Accepted for publication in ApJ Letter

Cassava improvement in the era of "agrigenomics": the road to nextgeneration breeding.

In the last 45 years, IITA has played a pivotal role in the genetic improvement of cassava for resourcepoor farmers in sub-Saharan Africa (SSA). More than 400 varieties have been developed that are not only high yielding but also resistant to diseases and pests. Many of these improved varieties have been extensively deployed in SSA and have helped to avert humanitarian crises caused by the viral disease pandemics that devastated local landraces in East and Central Africa