Digital Commons Network^™

Statistical Distributions: How Deviant Can They Be?, James B. Mcdonald

BYU Studies

No abstract provided.

Nonlocal Symmetries And Backlund Transformations For The Self-Dual Yang-Mills System, C. J. Papachristou, Kent B. Harrison

Faculty Publications

The observation is made that generalized evolutionary isovectors of the self-dual Yang–Mills equation, obtained by "verticalization'' of the geometrical isovectors derived in a previous paper [J. Math. Phys. 28, 1261 (1987)], generate Bäcklund transformations for the self-dual system. In particular, new Bäcklund transformations are obtained by "verticalizing'' the generators of point transformations on the solution manifold. A geometric ansatz for the derivation of such (generally nonlocal) symmetries is proposed.

Quantum Electrodynamics Based On Self-Fields, Without Second Quantization: A Nonrelativisitc Calculation Of G – 2, A. O. Barut, Jonathan P. Dowling, Jean F. Van Huele

Faculty Publications

Using a formulation of quantum electrodynamics that is not second quantized, but rather based on self-fields, we compute the anomalous magnetic moment of the electron to first order in the fine structure constant α. In the nonrelativistic (NR) case and in the dipole approximation, our result is a_e≡(g—2)/2=(4Λ/3m)(α/2π), where Λ is a positive photon energy cutoff and m the electron mass. A reasonable choice of cutoff, Λ/m=¾, yields the correct sign and magnitude for g—2 namely, a_e=+α/2π. . In our formulation the sign of a₃ is correctly positive, …

Digital Neural Networks, Tony R. Martinez

Faculty Publications

Demands for applications requiring massive parallelism in symbolic environments have given rebirth to research in models labeled as neural networks. These models are made up of many simple nodes which are highly interconnected such that computation takes place as data flows amongst the nodes of the network. To present, most models have proposed nodes based on simple analog functions, where inputs are multiplied by weights and summed, the total then optionally being transformed by an arbitrary function at the node. Learning in these systems is accomplished by adjusting the weights on the input lines. This paper discusses the use of …

Comparison Of Effective Medium Procedures For Optical Modeling Of Laminar Structures, David D. Allred, Robert F. Edgerton

Faculty Publications

This study addresses the question, "How can the optical properties of matter in ultrathin amorphous nonmetallic films in multilayers best be determined from reflectance (R) and transmission (T) measurements?" A blue shift in the band gap of plasma CVD a-Si:H/a-SiNx:H multilayers was reported several years ago. It was suggested that the shift in the band gap, Eg, Relative to bulk a-Si:H as given by the Tauç plot was due to quantum confinement effects. The purpose of this study is to evaluate the usefulness of various effective media theories (EMT) for determining the optical constants of materials in a multilayer and …

Giovanni Maria Artusi's L'Artusi Overo Delle Imperfettioni Della Moderna Musica (1600): A Translation And Commentary, Malcolm Litchfield

Faculty Publications

Giovanni Maria Artusi is well known for his conservative role in the debate between advocates of the prima and seconda pratiche. Contemporary authors marvel at Artusi's audacity in criticizing the genius of Monteverdi. Though often viewed as a pedant, Artusi was a significant Italian theorist who understood ancient Greek theory and had innovative ideas for applying this ancient knowledge to modern practice.

L' Artusi, overo Delle imperfettioni deIla moderna musica was written to illuminate and correct errors Artusi found in contemporary scholarship (chiefly in Bottrigari's work) and composition (specifically, certain liberties in Monteverdi's madrigals). Artusi effectively argues for a universal …

Bicentennial Reflections On The Media And The First Amendment, Bruce C. Hafen

BYU Studies

No abstract provided.

Can Programmers Reuse Software?, Scott N. Woodfield, David W. Embley, Del T. Scott

Faculty Publications

An experiment asked programmers untrained in reuse to evaluate component reusability. They did poorly. Are reusability's promises hollow? Or are there some answers?

Surface Conductance Of A Copper Wire In A Fluid At High Pressure, Daniel L. Decker

Faculty Publications

The three-dimensional flow of heat in a wire carrying a current and immersed in a liquid is solved in detail. Using this exact result the surface conductance of copper in petroleum ether has been measured as a function of pressure to 40 kbars. The measured surface conductance for copper in a fluid is very small, justifying approximations which yield results that are in agreement with a simplified one-dimensional heat-flow problem. Surprisingly, even at 40 kbars pressure a very large fraction of the joule heating within a wire with a length-to-diameter ratio of ~100 is dissipated through the ends of the …

Superconductivity At 155 K, David D. Allred, S. R. Ovshinsky, R. T. Young, G. Demaggio, G. A. Van Der Leeden

Faculty Publications

Transition to a superconducting zero-resistance state at 155 K is observed for the first time in bulk material. A new five-element compound has been synthesized with nominal composition Y1Ba2Cu3F2Oy. Fluorine plays a critical role in achieving this effect. X-ray diffraction and electron microprobe analysis indicate that the samples are multiphasic. Evidence is presented that the samples contain superconducting phases with onset temperatures considerably above 155 K. Magnetic measurements suggest a flux-trapping effect below 260 K, and diamagnetic deviations from Curie-Weiss behavior in the range from 250 K≤T≤100 K indicate that Meissner effect in a small superconducting volume fraction.

The Robinson Go Collection, Mariko Shimomura

Journal of East Asian Libraries

No abstract provided.

Aurealcaulis Crossii Gen. Et Sp. Nov., An Arborescent, Osmundaceous Trunk From The Fort Union Formation (Paleocene), Wyoming, William D. Tidwell, Lee R. Parker

Faculty Publications

Aurealcaulis crossii gen. et sp. nov., is based on permineralized trunks of an osmundaceous tree fern from the Paleocene Fort Union Formation from near Bitter Creek Station of southwestern Wyoming. This new species is characterized by centripetal (exarch) development of its xylem strands which form part of the leaf traces. Most of the leaf traces depart the stele as two segments that fuse into a single C-shaped petiole vascular strand outside of the outer cortex. Stipular expansions of the petiole bases of this species lack sclerenchyma, and roots arise from the lateral edges of leaf traces in the inner cortex. …

Some Aspects Of The Isogroup Of The Self-Dual Yang-Mills System, C. J. Papachristou, B. Kent Harrison

Faculty Publications

A generalized isovector formalism is used to derive the isovectors and isogroup of the self-dual Yang-Mills (SDYM) equation in the so-called J formulation. In particular, the infinitesimal "hidden symmetry'' transformation, a linear system, and a well-known Backlund transformation of the SDYM equation are derived in the process. Thus symmetry and integrability aspects of the SDYM system appear in natural relationship to each other within the framework of the isovector approach.

Publications, Lily Kecskes, Yoshiko Yoshimura, Yoon-Whan Choe

Journal of East Asian Libraries

No abstract provided.

The Gathering Of The Australian Saints In The 1850s, Marjorie Newton

BYU Studies

No abstract provided.

The Generals Of Convention And The Particulars Of Nature: Meaning From A Peircian View, John S. Robertson

Deseret Language and Linguistic Society Symposium

No abstract provided.

Assessment Of Influence That The Church Of Jesus Christ Of Latter-Day Saints Has On Exercise Habit Of Members Living In Utah County, Gary L. Preston

Theses and Dissertations

This study identified and analyzed the influence the Church of Jesus Christ of Latter-day Saints had on the decision of 309 respondents to exercise. The data obtained from the questionaires were analyzed using chi-square to compare males and females. Within the limitations of this study, the following conclusions were justified: women were more influenced by the LDS Church to exercise than men; LDS males and females exercised more than average American adults; walking, jogging, and aerobic dance were the most popular choices of LDS exercisers; and, there is a need to improve the awareness of LDS members concerning the Physical …

John Nock Hinton: The Reconstructed Life Of An English Born Mormon Convert Of Virgin City, Utah, Lenora Atkin Meeks

Theses and Dissertations

John Nock Hinton, an Englishman, was converted to the Church of Jesus Christ of Latter-day Saints in Birmingham, Warwickshire, England in 1856. The motivating factor in his life, thereafter, was his strong conviction that the Church was the literal kingdom of God on the earth, and its leaders were God's prophets, and its mission was to usher in the last dispensation on the earth, the Millennium, and the second coming of the Savior. His duty, as he saw it, was to labor unceasingly to help accomplish that mission, to work out his own salvation, and to teach his children the …

Godfrey Goodman And The Language Of Adam, Thomas S. Willard

Quidditas

Reformers in seventeenth-century England often spoke of a language of nature, sometimes referred to as the language of Adam. By this, they did not refer to what we would call a natural language, like English or French, but to a univocal language where words and things corresponded perfectly. They insisted that it need not be a dream; it could be made a reality if students would only turn form syllogisms to nature itself. With this insistence, Francis Bacon and others created the false impression that language theory in their time was essentially Adamic, committed to the view that all languages …

Book Review: Notes In Brief

Swiss American Historical Society Newsletter

Includes Notes in Brief for the following titles:

• Turning Swiss: Cities and Empire, 1450-1550
• A Castor Family in America, or: The Descendants of Hans Georg Gerster/John George Castor
• Schwester Gertrud Leupi, 1825-1904
• Fur Trade Letters of Francis Ermatinger, written to his brother Edward during his service with the Hudson Bay Company 1818-1853
• "Schweizerische Uberseeauswanderungen 1816- 1913. Ein quantitativer Ansatz
• "People of Choice: Decision Making in an Eighteenth Century Swiss-German Peasant Family"
• "'One's Own Hearth is Like Gold': A History of Helvetia, West Virginia"

Anneal Induced Changes In Amorphous Semiconductor Multilayers, David D. Allred, Jesus González-Hernández, O. V. Nguyen

Faculty Publications

We have prepared, heat treated and characterized various amorphous semiconductor periodic multilayers and ultrathin films. These were prepared by several vapor deposition techniques at substrate temperatures ranging from 25°C to 300°C and possessed periodicities from 22 to 400Å. Films were subjected to isochronal thermal treatments at progressively higher temperatures. Two effects were observed: enhanced diffusion and retarded crystallization. Interdiffusion, at rates which are many orders of magnitude higher than those anticipated from crystalline data, was observed in a-Si/a-Ge multilayers. Crystallization of germanium, the more readily crystallized member of the couple, is retarded; the extent depends on the thickness of the …

John C. Freemont's Expeditions Into Utah: An Historical Analysis Of The Explorer's Contributions And Significance To The Region, Alexander L. Baugh

Theses and Dissertations

John Charles Fremont conducted five expeditions to the West during a period of twelve years (1842-1854). On four occasions, during three of these expeditions (1843-1844, 1845, and 1854), the explorer entered the Utah region. His explorations in northern Utah in 1843 focused primarily on the scientific analysis and survey of the Great Salt Lake. In 1844, Fremont again entered the Utah area and made scientific observations and calculations about the region, including accurately defining the geographic region known as the Great Basin, the name given it by Fremont. In 1845, Fremont proceeded through Utah while enroute to California and spent …

Equilibrium Properties Of Short Field-Reversed Configurations, Ross L. Spencer, M. Tuszewski

Faculty Publications

Some features of short field-reversed configuration (FRC) equilibria relevant to transport and stability are studied numerically and analytically. It is shown that magnetic field curvature effects significantly increase the FRC magnetization for plasma elongations epsilon is less than or equal to 4.

Pinuxylon Woolardii Sp. Nov., A New Petrified Taxon Of Pinaceae From The Miocene Basalts Of Eastern Oregon, William D. Tidwell, Lee R. Parker, Vaughn K. Folkman

Faculty Publications

Specimens of the new species Pinuxylon wollardii have been collected from Miocene strata near Kurkee, OR. These petrified specimens are unique in that, due to weathering, individual tracheids and ray cells can be separated for detailed SEM studies. This species is characterized by its high number of ray cells; numerous rays; large resin ducts which are commonly paired; primarily uniseriate pitting, two to five (usually three) small, oval or cirular pinoid pits per crossfield; and smooth walls on its transverse (ray) tracheids. The latter character relates this species to taxa in the subgenus Haploxylon of Pinus. Pinuxylon woolardii is most …

Through A Glass Darkly: Trying To Understand The Scriptures, Royal Skousen

BYU Studies

No abstract provided.

A Summer Excursion To The Lds Twilight Zone, Dennis E. Nelson

Issues in Religion and Psychotherapy

No abstract provided.

The Mccormick Korean Collection Of Pomona College, Judith Magee Boltz

Journal of East Asian Libraries

No abstract provided.

Considerations Of Temperature Stability In A Cylindrical Plasma, S. Neil Rasband, Yao-Hui Xu

Faculty Publications

A variational formulation is used to consider thermal equilibrium and stability for a cylindrical plasma modeled by dissipative magnetohydrodynamics. The parameter dependence of equilibrium solutions and their stability is followed using homotopy techniques. Solution branches and their connections are studied in relation to the applied fields.

Habitat Relationships Of Saltcedar (Tamarix Ramosissima) In Central Utah, Jack D. Brotherson, Von Winkel

Great Basin Naturalist

Nineteen study sites were established in areas infested with saltcedar bordering Utah Lake in central Utah. Saltcedar cover on the sites averaged 57% but varied widely from community to community. Seventeen soil factors were measured relative to the stands studied. Cover of saltcedar was regressed against the different soil factors, but no patterns were detected. Saltcedar functioned equally well at all levels of each gradient studied and appeared able to accommodate wide variations in all factors studied. It is suggested that saltcedar has evolved a general-purpose genotype that contributes to its being a vigorous and troublesome weed. Criteria as to …

What's Burning At Byu: The Role Of Combustion And Our Work To Understand It, L. Douglas Smoot

BYU Studies

No abstract provided.