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1990

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Discussion Of The Representation Of Intercrystalline Misorientation In Cubic Materials, Brent L. Adams, Hans Grimmer, Junwu Zhao Jan 1990

Discussion Of The Representation Of Intercrystalline Misorientation In Cubic Materials, Brent L. Adams, Hans Grimmer, Junwu Zhao

Faculty Publications

BLA and JZ acknowledge the support of the Office of Basic Energy Science of the US Department of Energy under grant No. DE-FG02-88ER45355. Help from Stuart Wright with the figures is gratefully acknowledged. Salient features of various parameterizations of cubic-cubic misorientation are discussed. It is proposed that the quaternion representation of rotations, as a pair of antipodal points on the surface of a four-dimensional sphere, encompasses the most desirable properties of other proposed representations, viz rectilinearity, a closed form for the composition of successive rotations, and an equivalence between the Euclidean measure on its parameter space and the invariant measure …

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Annealing Behavior Of The Photoluminescence Lines In Cdte And Znx Cd1-X Te Single Crystals, David D. Allred, A. Reyes-Mena, Jesus González-Hernández, Elías López-Cruz, Worth P. Allred Jan 1990

Annealing Behavior Of The Photoluminescence Lines In Cdte And Znx Cd1-X Te Single Crystals, David D. Allred, A. Reyes-Mena, Jesus González-Hernández, Elías López-Cruz, Worth P. Allred

Faculty Publications

The main lines in the photoluminescence spectra of Zn1Cd1-xTe single crystals grown by a modified Bridgman method in the compositional range of 0≤X≤0.25 have been identified. All crystals show only near-band-edge emission. To assist in the identification, various samples with different compositions were annealed under a Cd atmosphere. In the pure crystals, the prominent (A°, X) bound exciton line, as well as the doublet at longer wavelengths, disappear after the annealing. In contrast, the treatments do not change significantly the PL spectra of the mixed crystals.

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Diffuse Absorbing Beryllium Coatings Produced By Magnetron Sputtering, David D. Allred, C. M. Egert Jan 1990

Diffuse Absorbing Beryllium Coatings Produced By Magnetron Sputtering, David D. Allred, C. M. Egert

Faculty Publications

Beryllium coatings with varying thicknesses and columnar grain sizes were deposited by low temperature magnetron sputtering and wet chemically etched to enhance diffuse absorption of light. After etching these coatings exhibited a matte black surface finish and low specular reflectance (below 2%) in the IR up to a critical wavelength dependent upon the original grain size of the coating. Extremely thick coatings (350 µm) with original grain sizes of 10 to 12 µm were produced which exhibited specular reflectances below 0.5% up to 50 µm wavelength and a Lambertian BRDF at 10.6 µm averaging 4.3x10-3 ster-1. Scanning electron micrographs are …

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Photoconductive Characterization Of Znxcd1-Xte (0≤X≤0.25) Single Crystal Alloys, David D. Allred, Elías López-Cruz, Jesus González-Hernández, Worth P. Allred Jan 1990

Photoconductive Characterization Of Znxcd1-Xte (0≤X≤0.25) Single Crystal Alloys, David D. Allred, Elías López-Cruz, Jesus González-Hernández, Worth P. Allred

Faculty Publications

Large grain polycrystalline and single crystals of ZnxCd1-xTe grown by a modified Bridgman method were studied using the photoluminescence and photoconductivity techniques. The temperature dependence of the band gap, as determined by photoluminescence, follows the Varshni equation for measuring temperature in the range of 15-290 K. One of the fitted parameters, the Debye temperature, monotonically decreases with the increase of the atomic zinc concentration. A close correlation between the photoluminescence and photoconductivity measurements is also found. Samples in which the photoluminescence spectra exhibit emission bands associated to cadmium vacancies and other structural defects, show a photoresponse curve which includes, in …

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Design Of High Performance Soft X-Ray Windows, Raymond T. Perkins, David D. Allred, Larry V. Knight, James M. Thorne Jan 1990

Design Of High Performance Soft X-Ray Windows, Raymond T. Perkins, David D. Allred, Larry V. Knight, James M. Thorne

Faculty Publications

X-ray windows are used in sources and detectors to separate the neighborhood of the x-ray generation or detection from the use environment. While each use has its own requirements, there are some principles that should be used in designing an optimal x-ray window. Because x-rays are absorbed to some extent by all materials, minimizing absorption is one criterion in preparing windows. Also, for most uses there is a pressure difference across the window so that ensuring pinhole-free structure and sufficient mechanical strength to support the differential is another criterion for window design. Traditionally, absorption is minimized by fabricating the window …

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Real-Time Portable Multi-Layer Perceptron Voice Fundamental-Period Extractor For Hearing Aids And Cochlear Implants, J. R. Walliker, I. Howard Jan 1990

Real-Time Portable Multi-Layer Perceptron Voice Fundamental-Period Extractor For Hearing Aids And Cochlear Implants, J. R. Walliker, I. Howard

School of Engineering, Computing and Mathematics

No abstract provided.

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Inerrancy And Sovereignty: A Case Study On Carl F. H. Henry, Joseph Karanja Jan 1990

Inerrancy And Sovereignty: A Case Study On Carl F. H. Henry, Joseph Karanja

Master's Theses

Problem This study examines how the concept of inerrancy of Scripture presupposes a particular understanding of divine sovereignty. Investigation is based on the writings of Carl F. H. Henry, a contemporary American evangelical theologian. Method This investigation uses case—study approach. It consists of a descriptive analysis of Carl Henry's concepts of inerrancy and sovereignty as individual concepts and the sense in which the former presupposes the latter. General inferences are based on that analysis. Results This study shows that Henry's concept of sovereignty is an indispensable presupposition in his concept of inerrancy. Among other things, sovereignty denotes Gad's absolute causality, …

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Distancing As A Casual Factor In The Development Of /0/ And /X/ In Spanish, David Eddington Jan 1990

Distancing As A Casual Factor In The Development Of /0/ And /X/ In Spanish, David Eddington

Faculty Publications

The evolution of the Spanish sibilant system has been an object of study since the late nineteenth century. Since that time, a myriad of books and articles have been published on the subject whose major focus has been to determine the exact nature of the sibilant changes and the chronology of each change. As is the case in most historical work, the question of why phonological systems evolve usually takes on only secondary importance. Among those theories proposed in order to explain why phonetic changes occur is the functionalist idea that there needs to be an optimal acoustic distance between …

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Chemical Dynamics In North Sea Estuaries And Plumes, Andrew Turner Jan 1990

Chemical Dynamics In North Sea Estuaries And Plumes, Andrew Turner

School of Biological and Marine Sciences Theses

Observational and experimental studies have been undertaken in the southern North Sea environment, including five major estuaries (Humber, Thames, Scheldt, Weser and Elbe), with the aim of elucidating the mechanistic and kinetic details of trace metal reactivity required for the refinement of pollutant transport models. The results of a systematic investigation of suspended particle characteristics (BET specific surface area and porosity, carbon content. Fe and Mn oxide coatings) indicated that, although there exists significant yet explicable variability among the North Sea estuaries, such compositional factors do not exert an observable influence on solid-solution interactions. Furthermore, chemical reactivity was not usually …

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The New Faith-Science Debate: Probing Cosmology, Technology, And Theology [Review] / Edited By John M. Mangum., A. Josef Greig Jan 1990

The New Faith-Science Debate: Probing Cosmology, Technology, And Theology [Review] / Edited By John M. Mangum., A. Josef Greig

Andrews University Seminary Studies (AUSS)

No abstract provided.

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Immune Response Of Carp Cyprinus Carpio (L.) To IChthyophthirius Multifiliis (Foquet), With Reference To Events Within The Epidermis, Martin Leslie Cross Jan 1990

Immune Response Of Carp Cyprinus Carpio (L.) To IChthyophthirius Multifiliis (Foquet), With Reference To Events Within The Epidermis, Martin Leslie Cross

School of Biological and Marine Sciences Theses

The in vitro and in situ immune responses of carp Cyprinus carpio to Ichthyophthirius multifiliis were investigated in order to characterise the immune mechanisms involved in protection. 'O' group and adult carp were immunised against I.multifiliis by controlled infection procedures. Sterile immunity was not achieved; theronts were observed to penetrate the skin of immunised fish, although in the majority of cases this did not lead to successful trophozoite establishment. It was concluded that most parasites prematurely exited the epidermis of immunised fish within two hours of penetration as an active survival strategy. Trophozoites remaining in immunised fish beyond two hours …

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The Revised English Bible, Sakae Kubo Jan 1990

The Revised English Bible, Sakae Kubo

Andrews University Seminary Studies (AUSS)

No abstract provided.

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The Immune Response Of The Grey Mullet, Chelon Labrosus (Risso, 1826), To Cryptocotyle Lingua (Creplin, 1825), (Digenea), Bradbury Patrick Wood Jan 1990

The Immune Response Of The Grey Mullet, Chelon Labrosus (Risso, 1826), To Cryptocotyle Lingua (Creplin, 1825), (Digenea), Bradbury Patrick Wood

School of Biological and Marine Sciences Theses

The ability of thick-lipped grey mullet to mount both humoral and cellular immune responses to Cryptocotyle lingua has been demonstrated here for the first time. Of the 3 procedures for immunisation investigated, namely exposure to live cercariae, intraperitoneal (ip) injection of whole killed cercariae and ip injection of a cercarial sonicate, the former gave the highest primary antibody titres with a peak response at 4 weeks post infection. Peak titres occurred at 5 and 7 weeks after immunisation by ip injection of sonicated cercariae and whole killed cercariae respectively. An enhanced secondary antibody response was observed following challenge by ip …

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Professional Development And Training Needs Of School Principals In Tonga, Vili Vete Jan 1990

Professional Development And Training Needs Of School Principals In Tonga, Vili Vete

Theses: Doctorates and Masters

The main aims of this study were to investigate and identify the perceived professional development needs of the school principals in Tonga in relation to the current situation. The inquiry was designed to provide a description of the understanding and perceptions which the principals and educators held concerning: I. The familiarity of principals and educators with the professional development issues and provisions made for the professional development of school principals . 2. The perceived professional development and training needs of school principals. 3. The extent to which the current provisions offered for professional development of school principals meet the needs …

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An Examination Of The Pastoral Needs Of Students And The Needs Of Their Teachers As Providers Of Pastoral Care, Philip A. Crane Jan 1990

An Examination Of The Pastoral Needs Of Students And The Needs Of Their Teachers As Providers Of Pastoral Care, Philip A. Crane

Theses: Doctorates and Masters

The problem addressed by this research project is expressed in two parts. Firstly an examination of the pastoral care needs of students at a particular independent secondary school. Secondly, an examination of the needs of the teachers (as providers of pastoral care) who are attempting to understand and deal with the pastoral needs of the students. The research takes the form of a bounded case study, employing techniques of data gathering and analysis from each of the positivistic and naturalistic paradigms. As such then the study is described as mixed - mode research allowing for the triangulation (Jick, 1979. p.602) …

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1990 Weed Science Research Report, Ndsu Weed Science, Dept. Of Plant Sciences Jan 1990

1990 Weed Science Research Report, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 1990. It includes work on several crops and the management of several weeds in North Dakota.

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The Identification Of Leadership Qualities Of A Successful Woman Basketball Coach As Perceived By Players And Coaches, Elizabeth Anne O'Brien Jan 1990

The Identification Of Leadership Qualities Of A Successful Woman Basketball Coach As Perceived By Players And Coaches, Elizabeth Anne O'Brien

Graduate Research Papers

The primary purpose of this study was to examine the factors that contribute to the success of female basketball coaches. This study was done to develop a list of top leadership competencies based on selected~ coaching characteristics as identified by female intercollegiate coaches and players.

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The Validity Of The Caltrac Personal Activity Computer, Kimberly Lynn Jorgensen Jan 1990

The Validity Of The Caltrac Personal Activity Computer, Kimberly Lynn Jorgensen

Dissertations and Theses @ UNI

The purpose of this study was to validate the Caltrac Personal Activity Monitor against directly measured energy expenditure (EE) at treadmill speeds and grades of 3 mph, 0%; 3 mph, 8%; 5 mph, 0%; and 6 mph, 0%, with Caltracs located on the dominant hip, non-dominant hip, and the waistband at center back. It was hypothesized that there would be no significant difference between Caltrac Caloric output values (with Caltracs worn at any of the locations) and EE represented by Caloric output calculated from direct oxygen consumption (V02) and respiratory quotient (RQ) measurements from a Beckman metabolic measurement cart (MMC). …

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Creating Instructional Strategies Which Match Individual Learning Styles, Stephanie Veronica Frisco Jan 1990

Creating Instructional Strategies Which Match Individual Learning Styles, Stephanie Veronica Frisco

Graduate Research Papers

Recent studies have begun to focus on matching instructional 3 strategies and learning styles. For example, the studies conducted by Biggs, Papalia, and Smith and Renzulli ( cited in Curry, 1990) article has as their primary objective the study and application of learning styles to improve the immediate and long-term results of general teaching-learning processes. According to Guild (cited in Brandt, 1990) , the focal point of the learning style movement is that individuals are different, so one instructional strategy will not suit everyone. Teachers who have begun to explore the notion of learning styles agree that the concept gives …

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Zealous Representation Bound: The Intersection Of The Ethical Codes And The Criminal Law, Bruce A. Green Jan 1990

Zealous Representation Bound: The Intersection Of The Ethical Codes And The Criminal Law, Bruce A. Green

Faculty Scholarship

Professional codes adopted by states and based on the Model Rules of Professional Conduct and the Model Code of Professional Responsibility govern lawyers' conduct. The ethical codes, however, fail to address many ethical questions confronting lawyers. In this Article, Professor Bruce Green highlights the ethical codes' weaknesses, particularly as they relate to the conduct of criminal defense attorneys. As he describes, the ethical codes require advocates to represent their clients "zealously," but, at the same time, "within the bounds of the law." When the codes do not proscribe conduct that would advance their clients' causes, conscientious advocates must consider whether …

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Integrating Music With Other Content Areas, Charlesetta Michelle Dawson Jan 1990

Integrating Music With Other Content Areas, Charlesetta Michelle Dawson

Graduate Research Papers

A kindergarten class gains practice in reciting the letters of the alphabet by singing "The Alphabet Song." Musical instruments made by third grade children are used in experiments during a science unit on sounds. The mathematical concept of fractions is reinforced when fourth graders calculate musical note values of familiar tunes. Fifth grade students study the Civil War through the examination of lyrics of many songs representative of that era. In all four situations, music was utilized in the teaching of various content areas.

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The Effects Of A Cooperative Group Structure On Low-Achieving Students In The Area Of Reading, Lori A. Gross Jan 1990

The Effects Of A Cooperative Group Structure On Low-Achieving Students In The Area Of Reading, Lori A. Gross

Graduate Research Papers

The outcomes of Chapter 1 students involved in a cooperative group structure during reading were investigated. The study was conducted in a Chapter 1 classroom with two groups of second-grade students. A total of 8 subjects were involved in the study. During the 10-week study, each group was exposed to the experimental treatment for a 5-week period and the control treatment for 5 weeks. A cooperative group structure was implemented during the experimental treatment, with students working in dyads to complete assigned tasks. In the control treatment, students worked in a homogeneous ability group structure and follow-up work was completed …

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The Use Of Microcomputers In Language Arts In Elementary Classrooms, Diane Lovstuen Jan 1990

The Use Of Microcomputers In Language Arts In Elementary Classrooms, Diane Lovstuen

Graduate Research Papers

In 1983 Time magazine named the computer its "Machine of the Year," and declared, "The 'information revolution' that futurists have long predicted has arrived, bringing with it the promise of dramatic changes in the way people live and work, and perhaps even in the way they think. America will never be the same" {"Computer Moves In," 1983, p. 14). Computers are now standard equipment in the majority of schools. Collis (1988) reports on a 1986 survey that showed 85 percent of the elementary schools, 95 percent of the junior high schools, and 97 percent of the senior high schools in …

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Visual Literacy Extended Through Graphic Codes In Illustrations, Mary M. Mescher Jan 1990

Visual Literacy Extended Through Graphic Codes In Illustrations, Mary M. Mescher

Graduate Research Papers

Picture books have an important place in the lives of all children. Huck (1987) believes that illustrations in picture books can enlarge children's experiences, stretch their imaginations, and enhance their living. The illustrations of picture books can extend the text and sometimes can tell the story without the text. Kingman (1978) relates, "that children do not always recognize the beauty of these books, but early impressions do exert influence on the development of permanent tastes for children growing up. People do not forget what they experience in their early years. When people are older, they learn to look and forget, …

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Choice Of Law Issues In Mass Tort Litigation, Lynn Darrow Carson Jan 1990

Choice Of Law Issues In Mass Tort Litigation, Lynn Darrow Carson

Journal of Air Law and Commerce

No abstract provided.

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Microbursts: Will Technology Ever Catch Up, Ladawn M. Conway Jan 1990

Microbursts: Will Technology Ever Catch Up, Ladawn M. Conway

Journal of Air Law and Commerce

No abstract provided.

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Aviation Security And Pan Am Flight 103: What Have We Learned, Nancy Jean Strantz Jan 1990

Aviation Security And Pan Am Flight 103: What Have We Learned, Nancy Jean Strantz

Journal of Air Law and Commerce

No abstract provided.

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Propriety Of Class Actions In Mass Aviation Disaster Litigation, The, Mark W. Harris Jan 1990

Propriety Of Class Actions In Mass Aviation Disaster Litigation, The, Mark W. Harris

Journal of Air Law and Commerce

No abstract provided.

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1992 European Unification: Effects In The Air Transport Industry, The, Monica L. Luebker Jan 1990

1992 European Unification: Effects In The Air Transport Industry, The, Monica L. Luebker

Journal of Air Law and Commerce

No abstract provided.

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Freedom Of The Press: Does The Media Have A Special Right Of Access To Air Crash Sites, Karen S. Precella Jan 1990

Freedom Of The Press: Does The Media Have A Special Right Of Access To Air Crash Sites, Karen S. Precella

Journal of Air Law and Commerce

No abstract provided.

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