Letter to George Willis Bailey from Justin Brasfield

Letter from Justin Brasfield to George Willis Bailey. The envelope is postmarked 28 July 2011

Chemical Vapor Deposition of Heteroepitaxial Boron Phosphide Thin Films

Boron monophosphide (BP) is a group III-V compound semiconductor with a wide band gap of 2.3 eV. Its unique electrical properties make it a promising material for use as a room temperature thermal neutron detector and thermoelectric device in high temperature and radiation fields. A thin film of BP enriched in the boron-10 isotope can yield 2.8MeV of energy, which in solid-state BP can yield ∼0.5 million electron-hole pairs that would be detectable with minimal amplification in a device. The high carrier concentration, wide band gap, inertness and refractory nature make it an attractive material for use in the extreme environments of nuclear reactors. The main drawback to BP is the difficulty in synthesizing high quality thin films. The majority of the previous work on BP was performed on Si substrates. The high lattice mismatch between Si and BP incorporates strain in the BP film which causes varying defects and charge traps to be introduced, adversely affecting electrical performance. It is the purpose of this work to identify the parameters necessary to deposit highly ordered zincblende boron phosphide (BP) thin films on 4° off-axis C-face 4H-SiC(0001) substrates by chemical vapor deposition. SiC only has a 4% lattice mismatch from BP, which could greatly reduce the inherent strain from heteroepitaxial growth. Ultra high purity diborane and phosphineare used as reactive precursors, with hydrogen as the carrier gas. Conditions necessary for high quality BP thin films will be explored. SEM, XRD, TEM and Raman spectroscopy are used to characterize the BP films and identify the temperature, phosphine to diborane flow rate ratios, SiC wafer termination and wafer surface preparation to elucidate optimum BP thin films for eventual device fabrication

Determining some of the jobs and skills needed by farmers in the Hornbeak High School service area that ought to be included in an instructional program

Farming in Hornbeak High School service is becoming more mechanized each year. The mule and the plow are almost obsolete. With the coming of mechanized farming, many problems have been confronted by the farmers in the community relative to care and repair of mechanized farm machinery. There is no repair shop in the community, and farmers must do their own repair work or drive several miles to other towns to get their repair work done. If the teacher of vocational agriculture is fully aware of their farm mechanics needs, he will be able to give them assistance in the care and repair of their farm machinery. If the assumptions are true, the teacher ought to be able to organize an evening class in farm mechanics. By participating in such a course, the farmers will be able to save time and money by doing some of their own repair work

Responding to Changes in Auditing for Federal Agencies, on October 9, 1971 at Council Meeting of American Institute of Certified Public Accountants, Detroit, Michigan

https://egrove.olemiss.edu/aicpa_assoc/2041/thumbnail.jp

An Exploration of the Stressors, Coping Resources, and Resiliency of Rural Mothers of Children with Special Needs

A child with a severe disability intensifies the demands facing a family (Beck, Hastings, Daley, & Stevenson, 2004; Martin & Baker, 2001; Withers & Bennett, 2003). Mothers specifically face an intense challenge, a concern as a mother’s wellbeing directly impacts her child’s emotional well-being (Kobe & Hammer, 1994), physical development, and progress within treatment (Lessenberry & Rehfeldt, 2004). These challenges are further heightened for women living in rural communities as little has changed for individuals with disabilities in rural communities over the past twenty years (Letvak, 2002). Although heightened stress among these mothers is significant, it is unclear how best to minimize stress and facilitate adaptive coping and resiliency among these women. This qualitative dissertation was an exploration into the stressors, coping resources, and resiliency of rural mothers of children with severe disabilities. Ten mothers of children with severe disabilities living in rural, Southeastern communities participated in a semi-structured interview. Supplementary sources of data include member-checking interviews, participant observation, and reflective journaling. Data derived from these sources include stressors, coping resources, and resiliency factors. Identified stressors include the absence of services, the insufficiency of available services, the effort required to locate and access services outside the community, social stressors, financial demands, and stressors stemming from personal attributes. All of the coping strategies listed by the participants shared similarities with those utilized by mothers of children with special needs not living in rural areas (Baun, 2002; Ferguson, 2002; Keller, & Honig, 2004). However, social support and spirituality, two identified coping techniques, are highly reflective of traditional, rural culture (Letvak, 2002; Nordal & Hill, 1999; Slama, 2004b; Wagenfeld, 2003). The mothers also identified their primary sources of resiliency to be external to them, their child/family service providers or God. All of the participants had recommendations for additional, beneficial resources for themselves and their children. These results are informative and significant to research, practice, and advocacy. Ultimately, it is hoped that this study may assist in empowering members of this marginalized group, advancing beneficial governmental policies, and informing interventions to enhance the wellbeing of these mothers and children

Ares First Stage "Systemology" - Combining Advanced Systems Engineering and Planning Tools to Assure Mission Success

Ares is an integral part of NASA s Constellation architecture that will provide crew and cargo access to the International Space Station as well as low earth orbit support for lunar missions. Ares replaces the Space Shuttle in the post 2010 time frame. Ares I is an in-line, two-stage rocket topped by the Orion Crew Exploration Vehicle, its service module, and a launch abort system. The Ares I first stage is a single, five-segment reusable solid rocket booster derived from the Space Shuttle Program's reusable solid rocket motor. The Ares second or upper stage is propelled by a J-2X main engine fueled with liquid oxygen and liquid hydrogen. This paper describes the advanced systems engineering and planning tools being utilized for the design, test, and qualification of the Ares I first stage element. Included are descriptions of the current first stage design, the milestone schedule requirements, and the marriage of systems engineering, detailed planning efforts, and roadmapping employed to achieve these goals