Digital Commons Network^™

Aerodynamic And Acoustic Changes Following Intensive Voice Therapy For Patients With Parkinson's Disease: A Case Study, Christopher Dromey, Lorraine O. Ramig, Ronald Scherer

Faculty Publications

No abstract provided.

Swelling Properties Of Coal Chars During Rapid Coal Pyrolysis And Combustion,, Thomas H. Fletcher

Faculty Publications

Coal devolatilization experiments are commonly conducted at moderate temperatures (800 to 1300 K) and heating rates (10³ to 10⁴ Ks⁻¹) in inert environments in order to measure evolved species before secondary reaction in the gas phase. However, chars from these experiments exhibit different physical characteristics than chars obtained under typical combustion conditions (1500 to 2000 K, 10⁵ Ks⁻¹, and 3 to 10 mol% oxygen). Experiments were conducted in two laminar, entrained-flow reactors to determine characteristics of coal chars in inert and oxygen-rich environments. One flow reactor was heated electrically, with gas temperatures of …

Overview Of Acerc Comprehensive Model Development, Thomas H. Fletcher, Scott C. Hill

Faculty Publications

A major objective of the Advanced Combustion Engineering Research Center (ACERC) is the development of comprehensive combustion models to help in the solution of critical national combustion problems. Computer models incorporate research and technology results from center projects and from external research programs. The synergistic integration of scientific knowledge that is expected from the NSF engineering research centers is demonstrated to a great extent at ACERC by the development of these software tools. The transfer of technology from ACERC to industry is also accomplished in part by the implementation of the models at industrial firms. The effort to develop such …

Leaf Area Ratios For Selected Rangeland Plant Species, Mark A. Weltz, Wilbert H. Blackburn, J. Roger Simanton

Great Basin Naturalist

Leaf area estimates are required by hydrologic erosion, and growth/yield simulation models and are important to the understanding of transpiration interception, CO₂ fixation, and the energy balance for native plant communities. Leaf biomass (g) to leaf area (mm²) linear regression relationships were evaluated for 15 perennial grasses, 12 shrubs, and 1 tree. The slope coefficient (β₀) of the linear regression equation is a ratio of leaf area to leaf biomass and is defined as the leaf area ratio [LAR = one-sided leaf area (mm²)/oven-dry leaf weight (g)]. LAR represents β₀ in each …

Photopolymer-Based Stratified Volume Holographic Optical Elements, Gregory P. Nordin, A. R. Tanguay

Faculty Publications

We report the implementation of stratified volume holographic optical elements (SVHOE's) using DuPont's Omnidex holographic photopolymer material and an in situ exposure technique for simultaneous multilayer grating recording. Experimental measurement of the +1-order angular sensitivity of a seven-layer SVHOE structure shows remarkable agreement with both theory and numerical simulation for incidence angles near the Bragg angle. For SVHOE's having modulation layers that individually operate in the Bragg or transition diffraction regimes, the envelope of the SVHOE angular sensitivity is experimentally shown to approximate closely that of a single modulation layer.

Diffraction Properties Of Stratified Volume Holographic Optical Elements, Gregory P. Nordin, R. V. Johnson, A. R. Tanguay

Faculty Publications

We present a unified treatment of the diffraction properties of stratified volume holographic optical elements (SVHOE's). We show that the relative phasing of the diffraction orders as they propagate from layer to layer gives rise to a unique notched diffraction response of the +1 order (for the case of Bragg incidence) as a function of the normalized buffer-layer thickness, the grating spatial frequency, and the readout wavelength. For certain combinations of these parameters Bragg diffraction behavior characteristic of volume holographic optical elements (VHOE's) is observed, whereas for other combinations pure Raman-Nath behavior periodically recurs. By using these same relative-phasing arguments, …

A Family History Of John And Anna Von Gunten, Collin S. Van Gunten

Swiss American Historical Society Review

Greetings to All My Family:

The idea of a family history began this year when I attempted to identify my ancestors who preceded John and Anna von Gunten - an attempt to stretch backward the generations of our family tree. Other families overwhelm me with their pedigrees reaching into the 18th, even the 17th, century. So why shouldn't I trace my roots to a greater depth, hoping that our heritage would be revealed

In early 1989 I contacted a prof esmonal genealogist, asking if she would undertake a search of John's lineage. She declined, saying she did not specialize in …

Full Issue

Swiss American Historical Society Review

No abstract provided.

Use Of Raman Spectroscopy In Characterizing Soft X-Ray Multilayers: Tools In Understanding Structure And Interfaces, Ming Cai, Qi Wang, David D. Allred, Larry V. Knight, Dorian M. Hatch, A. Reyes-Mena, Guizhong Zhang

Faculty Publications

Our group is studying the structure and interfaces of soft x-ray multilayers by various techniques including x-ray diffraction and Raman spectroscopy. Raman spectroscopy is particularly useful since it is sensitive to the identity of individual bonds and thus can potentially characterize the abruptness of interfaces in multilayers. Blocking interfacial mixing is very important in achieving and maintaining high reflectivity. We report our studies of the as-deposited and postannealed structure of Mo/Si and W/C multilayers. The Mo/Si system is probably the most widely studied multilayer currently because of its potential applications for soft x-ray projection lithography for the range of 13 …

Weber, Spengler, And The Origins, Spirit, And Development Of Capitalism, John Farrenkopf

Comparative Civilizations Review

No abstract provided.

Crown-6 And The Future, Jerald S. Bradshaw

BYU Studies

No abstract provided.

Red Butte Canyon Research Natural Area: History, Flora, Geology, Climate, And Ecology, James R. Ehleringer, Lois A. Arnow, Ted Arnow, Irving B. Mcnulty, Norman C. Negus

Great Basin Naturalist

Red Butte Canyon is a protected, near pristine canyon entering Salt Lake Valley, Utah. It contains a well-developed riparian zone and a perennial stream; hillside vegetation ranges from grasslands on the lower limits to Douglas-fir and aspen stands at the upper elevations. In this paper we describe the history of human impact, natural history aspects of climate, geology, and ecology, and faunal and floral information for key species in the canyon. The role and importance of Research Natural Areas is discussed, particularly with respect to the need to protect Red Butte Canyon—one of the few remaining undisturbed riparian ecosystems in …

Soil Loosening Processes Following The Abandonment Of Two Arid Western Nevada Townsites, Paul A. Knapp

Great Basin Naturalist

Soil compaction was measured at four sites within two abandoned mining camps in the western Great Basin Desert, Nevada. Bulk density and macroporosity values were generated from soil samples collected in areas of different land use intensities in camps that had been abandoned for approximately 70 years. Results show that significant differences remain in bulk density values between abandoned roads and undisturbed areas in both towns, and that the areas around foundation peripheries are still significantly more compacted in one town. There were no significant differences between land use groups as measured by macroporosity. Estimated soil recovery, based on a …

Full Issue, Vol. 52 No. 2

Great Basin Naturalist

No abstract provided.

Full Issue

Brigham Young University Prelaw Review

No abstract provided.

Patent Law: Protecting Innovation In A Global Economy, Nathan O. Jensen

Brigham Young University Prelaw Review

For over 200 years, the United States has been renowned for the ingenuity of its citizens, such as Franklin, Edison, and Ford. The Government has recognized this ingenuity as a national asset and has developed a code of statutes, known as Intellectual Property Law, enabling its citizens to protect and benefit from their own creativity. In the present global marketplace, these laws are increasingly vital to the competitive success of our country's technology-based economy. Patent law is one part of the larger field of Intellectual Property Law, which also includes copyright, trademark, and trade secret law.

Heterogeneity Of Intergranular Damage In Copper Crept In Plane-Strain Tension, Brent L. Adams, David P. Field

Faculty Publications

The authors wish to acknowledge support of this work by the Office of Basic Energy Sciences of the U. S. Department of Energy. An interface damage function (IDF), which statistically describes the area fraction of interface damage as a function of up to eight parameters defining crystallite interfaces, was determined for commercial purity copper specimens crept in plane strain tension. The IDF was determined from stereological parameters measured on plane sections cut through damaged specimens. The eight-dimensional space of the function was investigated by analyzing two-dimensional projections of the complete domain. Certain special interfaces were observed to damage preferentially. A …

Economic Insights From The Book Of Mormon, Lindon J. Robison

Journal of Book of Mormon Studies

Economic systems are distinguished by their emphasis on equity and efficiency. Market controls are justified because of the need for equity. Free markets are justified because of the need for private incentives and efficiency. Most countries of the world today have adopted a combination of controls and free-market incentives. The Book of Mormon teaches that only through caring can equity and efficiency be simultaneously achieved.

The Chimerical Desert, John Bennion

BYU Studies

No abstract provided.

Studying The Saints: Resources For Research In Mormon History At The Huntington Library, Peter J. Blodgett

BYU Studies

No abstract provided.

Librarians, Edward Martinique, Hideo Kaneko, Maureen H. Donovan, Yanqiu Wang

Journal of East Asian Libraries

No abstract provided.

Libraries And Institutions, William Wong

Journal of East Asian Libraries

No abstract provided.

Interface Cavitation Damage In Polycrystalline Copper, Brent L. Adams, David P. Field

Faculty Publications

The authors acknowledge the support of the Office of Basic Energy Sciences of the United States Department of Energy. Determination of an interface damage function (IDF) from a stereological procedure similar to that presented by Hilliard is described. The mathematical and experimental simplicity of the method is utilized in measuring an IDF for polycrystalline copper crept at 0.6T sub m under uniaxial tension. Whereas previous work focused on a five parameter description of the local state of a grain boundary, the domain of the IDF is increased to eight degrees of freedom in the present study to include the complete …

Experimental Measurement Of Rov Tether Tension, Tim W. Mclain, S M. Rock

Faculty Publications

In the undersea operation of a tethered ROV system, the pilot's ability to control precisely the ROV is often limited by disturbance forces generated by drag due to currents that act either directly on the ROV or indirectly on the ROV through the tether. The objective of this research, which was conducted at the Monterey Bay Aquarium Research Institute (MBARI), was to characterize the magnitude and dynamics of tether forces by measuring them during operation. To achieve this, a tether tension sensor and data logging system were developed. This system was used to measure the forces in the tether of …

A General Three Dimensional All Quadrilateral Surface Mesh Generation Algorithm, Roger Cass

Theses and Dissertations

Among the available all-quadrilateral mesh generation algorithms progressive-front offers the best quality and robustness. The paving algorithm is a progressive-front technique that generates a two dimensional mesh of all quadrilaterals on planar surfaces. The technique is particularly suited to meshing irregular boundaries with interior holes. This thesis presents an extension of the paving algorithm to generalized three dimensional surfaces. The major problems in three-dimensional surface mesh generation are projection of nodes, calculation of interior angles, and connection of mesh fronts. The solutions to these problems are presented. This work is part of the ongoing CUBIT project at Sandia Labs. The …

Proposed Agenda For A Spiritual Strategy In Personality And Psychotherapy, Allen E. Bergin, I. Reed Payne

Issues in Religion and Psychotherapy

This essay argues that spiritual approaches in personality and psychotherapy are currently not coherent and that a rational strategy is not being pursued to develop an authentic spiritual orientation that can take its place alongside the other major orientations to personality and psychotherapy. It is suggested that a systematic spiritual approach needs to be developed that contributes uniquely to (a) a conception of human nature, (b) a moral frame of reference, and (c) specific techniques of change. In addition, a spiritual approach, if it is to be a viable option in the mental health field needs to be (d) empirical, …

Note On The Number Dependence Of Nonequilibrium Molecular Dynamics Simulations Of The Viscosity Of Structured Molecules, Richard L. Rowley, James F. Ely

Faculty Publications

Nonequilibrium molecular dynamics simulations have been performed for a system of 512 four-site models representing n-butane molecules. The results are compared to simulations previously reported for 125 molecules to check a recently reported number dependence in such simulations. A small system size dependence was observed at low shear rates, but the rheological behavior is not affected. Considerably greater certainty is obtained using larger systems.

Obituary: Fritz Marti, Philosopher, Dies At 97 In Tucson, Arizona

Swiss American Historical Society Review

Professor Fritz Marti passed away in his sleep November 23, 1991, in Tucson, Arizona, where he lived with a daughter since 1987. He would have been 98 years old on January 1st. Born in Winterthur, Switzerland in 1894, Marti served in the Swiss Army during the First World War as an engineer and as an intelligence officer in England at the war's outset, preventing German nationals from returning to Germany under the guise of Swiss citizenship. He took his Doctorate of Philosophy at the University of Bern in 1922 and came to the United States that year to teach at …

Full Issue

Swiss American Historical Society Review

No abstract provided.

When Coyotes Take The Bandstand, The Small Houses Lean, Joanna Brooks

Inscape

No abstract provided.