Semiclassical Mechanics of Rotons

The elementary excitations in superfluid liquid He-4 named rotons have an unusual dispersion curve. The energy is an approximately quadratic function of (p-p_0), the difference between the magnitude of the momentum p and a characteristic value p_0. As a result, while for p>p_0 a roton has its (group) velocity parallel to its momentum, when p<p_0 the velocity and momentum are antiparallel. When p=p_0, the roton has non-zero momentum but zero velocity. These kinematic properties lead to unusual trajectories when rotons scatter or experience external forces. This paper examines this behavior in the classical (ray optics) limit, where the roton wavelength is small compared with all other dimensions. Several experiments illustrate these effects. The examples are interesting in themselves, and also offer unconventional pedagogical possibilities.Comment: 21 pp, 7 figures, submitted to Contemporary Physic

On the shell equations in complex form

Formulation of general equations of linear thin shell theory in terms of complex combinations of dependent variable

Study of highly fluorinated heterocyclic polymers for cryogenic bladder applications Final report, 15 Oct. 1968 - 15 Mar. 1970

Highly fluorinated heterocyclic polymers for cryogenic bladder application

An Ecological Approach for Developing Authentic Leaders in the Church: A Literature Review

The repercussions of the leadership crises in the last quarter-century have spurred new approaches to leadership and its development. This article argues for the use of Uri Bronfenbrenner’s bioecological development theory as a framework for developing authentic leaders in the church. The first section overviews the components of authentic leadership. The next section examines four facets of the bioecological theory that directly influence leadership development. In the final section, four action steps are proposed to enhance leadership development in the church

Population Dynamics of Peromyscus Leucopus

A thesis presented to the faculty of the School of Science and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Maxwell S. Sanders Jr. in July of 1968

Vocational Education and Recidivism at the Louisiana Correctional Institute for Women.

Recidivism is a phenomenon causing growing concern. When released criminals return to crime, the costs become immeasurable. Victims can never be adequately compensated for personal losses, and the nation cannot halt the spiraling costs of maintaining prisons housing mostly repeat offenders. The nation is spending upwards from 98 billion dollars on crime, annually. Public opinion opposes education for inmates, yet, with the nation\u27s prisons operating near capacity, a millennium approaches that promises another wave of prison construction resulting in exponential leaps in the costs of incarceration. A marketing concept asserts that attracting people to a product is half the battle. Since repeat offenders are a captive audience, they should be simply directed to treatments that reduce their tendencies for subsequent failure in society. Dating back to earliest civilizations, incarceration is not a new concept, yet, discovery of the cures for criminal tendency and recidivism remains elusive. The purpose of this study was to determine if a relationship exists between the reduction of recidivism and the completion of a post-secondary vocational education or GED course. The ex-post facto research was conducted using data on inmates released from the Louisiana Correctional Institute for Women between 1990 and 1994. The participants included 130 inmates completing education courses and a sample of 130 education non-participants. Variables linked with the reduction of recidivism included: Completion of a Vocational Education Course, Number of Prior Felony Convictions, and Age at Release. Specifically, this study showed that vocational education course completers tended to have lower recidivism rates as compared with education non-participants, with older inmates, and with inmates having fewer prior felony convictions. An additional finding suggested that education course completers who did recidivate tended to stay out of prison one year longer than education non-participants. Further, the study supports a three-year follow-up period for use in recidivism research. A model was developed using a discriminant analysis. The model correctly classified 61.5% of the participants. The study involved an extensive review of literature leading to a rationale for the design. Detailed procedures are provided to assist in the development of future recidivism studies