Physical Sciences and Mathematics Commons^™

Random Magnetism In Amorphous Rare-Earth Alloys (Invited), David J. Sellmyer, S. Nafis

David Sellmyer Publications

Several aspects of the magnetic transitions seen in rare-earth metallic glasses are discussed, particularly with reference to recent theoretical work. These include: (a) apparent double transitions observed in Gd glasses where exchange fluctuations are important, (b) evidence for a correlated speromagnetic state recently predicted by Chudnovsky and Serota, and (c) the analysis of a Tb glass with strong random anisotropy in terms of an Ising-type spin-glass transition. Journal of Applied Physics is copyrighted by The American Institute of Physics.

Constraint On The Optical Constants Of A Film-Substrate System For Operation As An External-Reflection Retarder At A Given Angle Of Incidence, R. M.A. Azzam, Bruce E. Perilloux

Electrical Engineering Faculty Publications

Given a transparent film of refractive index n₁ on an absorbing substrate of complex refractive indexn₂-jk₂, we examine the constraint on n₁, n₂, and k₂ such that the film-substrate system acts as an external-reflection retarder of specified retardance Δ at a specified angle of incidence φ. The constraint, which takes the form ƒ(n₁,n₂,k₂;φ,Δ) = 0, is portrayed graphically by equi-n₁ contours in the n₂,k₂ plane at φ = 45, 70° and for Δ …

Anomalous Magnetic Hysteresis In An Amorphous Nd54Co36B10 Alloy, George C. Hadjipanayis, S.H. Aly, David J. Sellmyer

David Sellmyer Publications

The hysteresis and crystallization behavior of an amorphous Nd₅₄Co₃₆B₁₀ alloy have been examined over a range of temperatures. Crystallization studies show a glass transition temperature around 210 °C, two crystallization peaks at around 220 and 360 °C, and two endothermic peaks at around 530 and 600 °C, respectively. ac susceptibility measurements show an ordering temperature of 38 K for the amorphous phase. Four additional magnetic phases have been observed in the crystallized samples with ordering temperatures 17, 45, 90, and 190 K, respectively. Magnetic measurements on melt-spun ribbons reveal a coercivity of 6 kOe at …

Rapidly Quenched FeXTa100-X Alloys, C.L. Chien, Sy_Hwang Liou, B.K. Ha, K.M. Unruh

Sy-Hwang Liou Publications

Binary alloys of Fe_xTa_100-x were made by high-rate sputtering. A sharply defined boundary separates the composition ranges in which crystalline alloys (93 ≤ x ≤100) and amorphous alloys (15 ≤ x ≤ 90) are formed. The amorphous alloys with Fe concentrations up to the threshold of x_c ≈ 65 are nonmagnetic. For the samples with x > x_c, the magnetic ordering temperature (T_c) varies monotonically with Fe content to 200 K for a-Fe₉₀Ta₁₀. However, the crystalline alloys, with slightly higher Fe content, are strongly ferromagnetic. Their T …

Magnetic Properties And Hyperfine Interactions Of Amorphous Fe-Hf Alloys, Sy_Hwang Liou, G. Xiao, J.N. Taylor, C.L. Chien

Sy-Hwang Liou Publications

Alloys of Fe_xHf_100-x (20 ≤ x ≤ 100) were fabricated by a vapor-quench method. The amorphous state, as verified by x-ray diffraction, is realized over a wide composition range of 20 ≤ x ≤ 94. The magnetic phase diagram was determined. The variation with Fe content of the magnetic ordering temperature (T_{c) in Fe-Hf amorphous alloys shows a maximum at xp≈87. In contrast, the effective magnetic hyperfine field and therefore the Fe moment increases monotonically with x. Amorphous pure Fe is likely to be magnetic (Tc ~200 K) with …}

Middle Miocene To Recent Stratigraphy And Paleogeography Of Western Nebraska, James B. Swinehart, Vernon L. Souders, H. M. Degraw, Robert F. Diffendal Jr.

School of Natural Resources: Faculty Publications

Two generally distinctive suites of sediments occur in western Nebraska, one dominantly volcaniclastic in origin deposited from the Oligocene through Early Miocene, and the other mainly epiclastic in origin deposited from the Middle Miocene through the Holocene. We have combined the epiclastic deposits usually placed in the Hemingford and Ogallala groups into an expanded Ogallala Group and have abandoned the member subdivisions of the Broadwater Formation.

Oligocene To Middle Miocene (White River And Arikaree Groups) Stratigraphy And Paleogeography Of Western Nebraska, James B. Swinehart, Vernon F. Souders, H. M. Degraw, Robert F. Diffendal Jr.

School of Natural Resources: Faculty Publications

The White River Group traditionally has been divided into three stratigraphic units in western Nebraska, the Chadron, Orella, and Whitney. We also recognize three depositional sequences in the group but these consist of the following stratigraphic intervals (oldest to youngest): 1) the base of the Chadron to the unconformity in the Orella Member; 2) the unconformity to the top of the Whitney; and 3) the Brown Siltstone beds (a new informal unit). We divide the Arikaree into three units; 1) the Gering; 2) Monroe Creek-Harrison formations; and 3) the Upper Harrison beds.

Electing A Leader In A Synchronous Ring, Greg N. Frederickson, Nancy A. Lynch

Department of Computer Science Technical Reports

No abstract provided.

Test 1558: White Farm Equipment 4-225 Diesel 18-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Origin Of The Peaked Structure In The Conductance Of One-Dimensional Silicon Accumulation Layers, Richard A. Webb, A. Hartstein, J. J. Wainer, A. B. Fowler

Faculty Publications

We have made extensive studies of the temperature, gate voltage, and electric field dependences of the conductance peaks in small silicon inversion layers in order to distinguish between resonant-tunneling models and a hopping model. We find that many of the peaks are consistent only with a hopping model, whereas some could be consistent with an early resonant-tunneling model. None of our structure is consistent with resonant tunneling if the recent formulation of Stone and Lee is correct.

Practical Applications Of Research: "Enough To Curdle Milk", Gary Haight Richardson

Faculty Honor Lectures

It is a privilege to be given this opportunity and a challenge to present material in a narrow discipline in a way that might be appreciated by many. I like to think I can relate to other disciplines. Although I came to Utah State University to be a music major, a concerned father foresaw that I might not earn a living in this area (he had heard me practice) and suggested an interview with A. 1. Morris before checking into the Music Department. A. 1., Head of the Dairy Manufacturing Department, was as convincing and persuasive as Tony Ernstrom is, …

A Survey Of Program Design Languages (Pdls), Brian A. Nejmeh, Herbert E. Dunsmore

Department of Computer Science Technical Reports

No abstract provided.

Explorations, Vol. 1, No. 2, Jim I. Mead, Emilee M. Mead, Carol J. Bombard, Ronald B. Davis, Marcella H. Sorg

Explorations — A Journal of Research

The cover print is a multi-plate colored etching entitled Skull and Sun Dial, by Susan Groce, Associate Professor of Art at the University of Maine at Orono, where she teaches Printmaking and Drawing.

Articles include:

"The Quaternary"

"Ice Age Plants and Animals: Secrets of the Colorado Plateau," by Jim I. Mead and Emilee M. Mead

"Finding the Facts: Pieces of the Puzzle"

"On Location: In Search of the First Americans"

"A Temporal Vegetational Continuum: From Tundra to Forest," by Carole J. Bombard for Ronald B. Davis

"Anatomy of an Excavation," by Robson Bonnichsen

"What the Bones Tell Us," by …

Hydrodynamic And Water Quality Measurements In The Appomattox River : A Report To The City Of Petersburg, Virginia Institute Of Marine Science

Reports

No abstract provided.

Electronic Structure Of The Phosphoryl And Thiophosphoryl Bonds, Michael W. Schmidt, Mark S. Gordon

Mark S. Gordon

.The pho~phoryl bond is presented as a. resonan~e hybrid between singly and triply bound structures. The types of electromcally excited states and a number of their potential surfaces can be understood within the confines of a singly bound model: However, a detailed analysis of the electronic distribution within the ground state shows significant contribution from the tnpl~ bound structure. In fact, increasing the electronegativity of the ligands at phosphorus increases the contribution of t~e tnp~y bound structure, so that the. PO bond order approaches that of a double bond. The thiophosphoryl bond may be VIewed m much the same manner …

Monthly Planet, 1985, Spring, David Kuester, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Construction And Testing Of A New Atomic Physics Beam Line At The Western Michigan University Accelerator Laboratory, William Andrew Hollerman

Masters Theses

A new beam line containing a differentially-pumped gas cell and charge state analyzing magnet was constructed for the purpose of measuring a wide variety of atomic inner-shell processes, such as excitation, ionization, and charge transfer. The completed system will be able to measure these individual atomic processes using coincidence techniques. Initial testing of the beam line was performed using 40MeV S⁺⁷+Ar collisions to determine the effect of the collimating slit size on the measured x-ray cross sections. These measurements showed that the slip size on the measured x-ray cross sections. These measurements showed that the slit size affects …

The Impeachment And Trial Of Secretary Of War William Worth Belknap, Duane Edward Holthof

Masters Theses

The purpose of this thesis is to give an account of the events which lead to the resignation of Secretary of War William Worth Belknap in 1876, to examine the circumstances surrounding his impeachment, and to study the testimony in his Senate trial.

Although Belknap was not convicted on charges of accepting bribes, most of those senators who voted to acquit him did so on the technical ground that the Senate lacked the jurisdiction to try a private citizen. The evidence in the case clearly indicated Belknap's involvement, and there seems little doubt that if Belknap did not know what …

The Pauli Operator Correction In The Effective Λn Interaction, Jaleh Owliaei

Masters Theses

Hypernuclear structure calculations performed for ⁶_ΛLi, ⁷_ΛLi, and ¹⁶_Λ0 have reproduced the 1_Λ=1 levels inferred from the recent (k, Π) reactions. However the 1_Λ=0, groundstate of ¹⁶_Λ0 is overbound by 6 MeV in these calculations, indicating a density dependence in the effective ΛN interaction in the interior of the heavier system. In this work corrections to the ¹⁶_Λ0 effective interaction are introduced in terms of a Brueckner-Goldstone G-matrix with a modified Pauli operator. The G-matrix of ¹⁶_Λ0 derived from that of ⁶_ΛLi …

Resonant Electron Transfer And K-Shell Excitation Of Lithiumlike Projectiles In Collisions With Neutral Gas Targets, Carollyn Sloan Oglesby

Masters Theses

No abstract provided.

A 73.8 Mhz Radio Interferometer Telescope For Intense Celestial Sources, William Charles Millar

Masters Theses

A 73.8 MHz radio interferometer telescope was built, based on a published design. Although the design was proven, the telescope has thus far given no results on celestial sources. The electronics has been proven to be operational by testing them with hand-held dipole radio sources. Here, the electronics is evaluated with a discussion of possible reasons for the failure of the telescope in overall operation.

Problems Of Channel Correlation And Statistical Bias In Photon-Correlation Spectroscopy, Richard C. Haskell, Gary L. Pisciotta

All HMC Faculty Publications and Research

Correlation between channels of the normalized photocount-rate correlation function g⁽²⁾(τ) becomes significant at high count rates and leads to a number of data-analysis problems. We derive an expression for channel correlation that is valid for a detector area of arbitrary extent and compare the theoretical predictions with measured values. A data-analysis procedure is demonstrated that employs the theoretical expression for channel correlation and provides a rigorous test of an assumed fitting function. The procedure facilitates the use of the cumulant method in determining the polydispersity of scatterers. An expression for the statistical bias of g^{(2) …}

The Probe, Issue 52 - April 1985

The Probe: Newsletter of the National Animal Damage Control Association

THE PROBE
National Animal Damage Control Association No. 52 April, 1985
NADCA Questionaire
HR 1000 to help farmers in debt to the Farmers Home Administration
Eastern Coyote Expert
The Fur Trade is Taking Animal Protection Attacks Seriously
Llamas may be able to help prevent depredation under pen situations.
New Faces in NADCA
Letters to Ye Ed
ADC to USDA

Lessons Learned From The Csis [Centralized Storm Information System] (Appendix D), Frederick R. Mosher, Joseph T. Schaefer

Publications

Various attempts have been made to give up-to-the-minute meteorological observations to forecasters. However, the meteorologist's inability to assimilate all the real-time data is a significant barrier to the improvement of short-term forecasts and warnings. Historically, failure to resolve this problem has plagued mesoscale forecast experiments. This article discusses the joint effort of NWS, NESS, NASA, and SSEC to develop a system to aid the forecaster in evaluating data.

Efficient Use Of Fertilizer On Tobacco, J. L. Sims

Soil Science News and Views

Recent increases in fertilizer prices and other productions costs have stimulated interest in ways to increase the efficiency of fertilizer use while maintaining or increasing yields and quality of tobacco. Growers currently spend about $250 per acre for fertilizer. Although this represents only 15 to 20 percent of the total cash costs per acre, it is one category of cash expenses that can be decreased.

John Muir Newsletter, April/June 1985, Holt-Atherton Pacific Center For Western Studies

Muir Center Newsletters (1981-2015)

Holt-Atherton Pacific Center for Western Studies VOLUME 5 APRIL/JUNE 1985 University of the Pacific Stockton, Calif 95211 NUMBER 2 EDITORIAL STAFF: RONALD H. LIMBAUGH, KIRSTEN E. LEWIS MUIR CONFERENCE AN OUTSTANDING EVENT Over 250 registrants from all parts of the West attended the special John Muir Conference on the University of the Pacific campus April 12-13. Twenty-five speakers and panelists from thirteen differene academic institutions in nine different states and the Ditrict of Columbia participated in this edition of the California History Institute, highlighted by Hollywood actor Lee Stetson's highly-acclaimed one-man show: "Conversation with a Tramp: An Evening with John …

Reactivity Of Some Nitrogen-Containing Compounds At Supercritical Water Conditions, David M. Tiffany

Masters Theses

The use of water at cuperctirical conditions to remove nitrogen from several nitrogen-containing compounds was studied with the purpose of exploring the use of supercritical water as a method of removing nitrogen from the extraction products of coal. Quinoline and isoquinolone were the primary model compounds used with benzonitrile and carbazole also being examined briefly. Reaction conditions varied in temperature (350-500°C), pressure (3500-5200 psi), and water density (0.170-.0.426g/cc). The major products formed by isoquinoline were benzene, toluene, ethylbenzene, and o-xylene as well as nonvolatile tar and char. Quinoline produced aniline and toluidine in addition to those obtained from isoquinoline. Most …

Impacts Of Interactive Processing Systems On The Forecasting Ability Of The National Severe Storms Forecast Center (Appendix E), Frederick R. Mosher

Publications

The National Severe Storms Forecast Center (NSSFC) in Kansas City has the most modern interactive processing equipment of any operational forecast office in the United States. As such, the experiences of the NSSFC serve as the indication of some of the benefits which will be derived from interactive technology when it is applied in other forecast situations. The forecast products issued by the NSSFC have become more accurate and more timely. The forecaster's efficiency and productivity has noticeably improved. These improvements have been made without the introduction of any new data sources, any major advances in meteorology, or any major …

Laverkin Springs, Utah On-Site Pretreatment And Desalting Processes Evaluations, R. J. Eisenhauer, Bureau Of Reclamation

All U.S. Government Documents (Utah Regional Depository)

During December 1979 through August 1980, pilot plants and laboratory facilities were operated at the LaVerkin Springs, Utah site to characterize the water and to evaluate various pretreatment processes and desalting processes. The pretreatment processes studied included aeration-precipitation, lime treatment, lime-soda ash treatment, and lime-ion exchange treatment. Desalting at 80 and 90 percent water recovery levels was studied with both electrodialysis and high pressure reverse osmosis process equipment. Also, a "spiractor" was evaluated at the site as a lime-soda ash reactor and as a calcium sulfate desupersaturator. Data and results obtained from the test program will be used for feasibility …

Small-Angle Neutron Scattering Of (Er₀.₈Ho₀.₂)Rh₄B₄, Oran Allan Pringle, Herbert A. Mook, M. Brian Maple

Physics Faculty Research & Creative Works

The (Er_1-xHo_x)Rh₄B₄ pseudoternary alloy system has a minimum in the phase boundary between the superconducting and ferromagnetic phases near x=0.3. This minimum has been identified as due to the competing magnetic anisotropies of Er and Ho. It has also been suggested that there could be a Lifschitz point near the minimum. Using the 30-m SANS camera at the National Center for Small-Angle Scattering Research at ORNL, we have observed a peak in the SANS pattern for (Er _0.8Ho_0.2)Rh₄B₄ at Q=0.065 Å^-1. This peak appears for …