History: Office of Student Statistical Services

Prepared for the Centennial of The Ohio State University

Fully Coherent X-ray Pulses from a Regenerative Amplifier Free Electron Laser

We propose and analyze a novel regenerative amplifier free electron laser (FEL) to produce fully coherent x-ray pulses. The method makes use of narrow-bandwidth Bragg crystals to form an x-ray feedback loop around a relatively short undulator. Self-amplified spontaneous emission (SASE) from the leading electron bunch in a bunch train is spectrally filtered by the Bragg reflectors and is brought back to the beginning of the undulator to interact repeatedly with subsequent bunches in the bunch train. The FEL interaction with these short bunches not only amplifies the radiation intensity but also broadens its spectrum, allowing for effective transmission of the x-rays outside the crystal bandwidth. The spectral brightness of these x-ray pulses is about two to three orders of magnitude higher than that from a single-pass SASE FEL.Comment: 11 pages, 6 figure

My America

"December 2013.""A Thesis presented to the Faculty of the Graduate School at the University of Missouri--Columbia In Partial Fulfillment of the Requirements for the Degree Master of Fine Arts."Chairperson of Supervisory Committee: Professor Jessica M. Thornton.As a maturing artist and maker of objects, material usage is paramount. Materials convey a range of emotions, memories, and placement. Viewers will bring their own information and understanding to works of art. So by using house-building materials in my work, I desired the viewer to be a part of my home and my America. Using house building materials such as Valspar paint, panel board, and wire brads gives the work a sense of familiar place. This place is my experience of what community once was; community was about building and growing as a family. I have used the 1980's television sitcom, The Cosby Show, as a reference for what I aspire to be as a Black male in America. The title My America is inspired by a John Biggers book titled My America. These two major influences were significant in making this body of work. I questioned myself, what my America looks like and how others perceive it. In the foreword of John Biggers' My America, contemporary artist Whitfield Lovell makes it clear, that "black artists making art was not only an aesthetic journey but a political one as well. Not only were we struggling to find truth through our media, we were also struggling for equality in our own society" (Lovell 5). My work acknowledges my heroes. These historical icons continue to redefine stereotypes of Blacks, African Americans, or Negroes in America.Includes bibliographical references (pages 36-37)

Facilitation of Verbal Labeling in Adult Aphasia by Gestural, Verbal, or Verbal Plus Gestural Training

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Child and Parent Report of Parenting as Predictors of Substance Use and Suspensions from School

This study examined how child and parent reports of parenting were related to early adolescent substance use and school suspensions. Data were from two time points six months apart on 321 families with an eighth grade student attending one of five schools in the Pacific Northwest. Child- and parent-report measures of family management practices were moderately correlated (r = .29). Child report, but not parent report, of more positive family management practices uniquely predicted a lower likelihood of adolescent substance use. Also, discrepancies between child and parent report of parenting predicted substance use, with child positive report of family management losing its protective association with adolescent substance use when parents had negative reports of their parenting. Parent report, but not child report, of better parenting predicted lower likelihood of suspensions, suggesting that the salience of child and parent report may depend on the type of behavioral outcome

Child and Parent Report of Parenting as Predictors of Substance Use and Suspensions from School

This study examined how child and parent reports of parenting were related to early adolescent substance use and school suspensions. Data were from two time points six months apart on 321 families with an eighth grade student attending one of five schools in the Pacific Northwest. Child- and parent-report measures of family management practices were moderately correlated (r = .29). Child report, but not parent report, of more positive family management practices uniquely predicted a lower likelihood of adolescent substance use. Also, discrepancies between child and parent report of parenting predicted substance use, with child positive report of family management losing its protective association with adolescent substance use when parents had negative reports of their parenting. Parent report, but not child report, of better parenting predicted lower likelihood of suspensions, suggesting that the salience of child and parent report may depend on the type of behavioral outcome