Physical Sciences and Mathematics Commons^™

Converted Railroad Corridors As Avian Habitat In Southeast Nebraska, Kevin L. Poague

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Water Current, Volume 26, No. 6, December 1994

Water Current Newsletter

Waste Management Problem Focus of '95 Seminars
From the Director
Policies Topic of '95 Conference
Glossary of Water-Related Terms
Researchers Try to Outsmart Hardy Pests
Reflections on a Year Well Spent
Scientific Conference "In the Bush"
Symposium Spurs Water Discussion

Energy Spread And Ion Current Measurements Of Several Ion Sources, A. D. Gaus, W. T. Htwe, J. A. Brand, Timothy J. Gay, M. Schulz

Timothy J. Gay Publications

Energy spread and extracted current measurements are presented for five different types of ion sources: hot cathode, cold cathode, magnetron, microwave, and electron cyclotron resonance (ECR). The measurements were performed with a 45° parallel-plate energy analyzer with a resolution of better than 0.5 eV at 500 eV incident energy. Energy spreads ranged from 0.5 to 4 eV, while total extracted beam currents ranged from 2 to 30 μA. Beam currents due specifically to protons, ³He⁺⁺ ions, and H⁺₂ ions are also presented. The ECR and magnetron sources gave the best overall performance. These, along with the …

Electron-Beam-Induced Patterned Deposition Of Allylcyclopentadienyl Palladium Using Scanning Tunneling Microscopy, D.S. Saulys, A. Ermakov, E.L. Garfunkel, Peter A. Dowben

Peter Dowben Publications

Scanning tunneling microscopy has been used to study the electron-induced decomposition of allylcyclopentadienyl palladium [Pd(η³-C₃H₅)( η⁵-C₅H₅)] and subsequent deposition on a Si(111) surface. Deposition occurs via an electron impact mechanism on either the tip or surface, depending on the bias polarity, and is observed with voltages of 2.75 V. This is close to the predicted condensed phase dissociation energy of 2.3 eV for Pd(η³-C₃H₅)(η⁵-C₅H₅)→Pd+C₃H₅+C₅H₅. Metallic deposits of nanometer …

The Prairie Naturalist Volume 26, No. 4. December 1994

The Prairie Naturalist

REPRODUCTION OF RING-NECKED PHEASANTS IN IOWA ▪ T Z. Riley, J. B. Wooley, Jr. , and W. B. Rybarczyk

DIETARY COMPARISONS OF ADULT MALE COMMON GRACKLES, RED-WINGED BLACKBIRDS, AND YELLOW-HEADED BLACKBIRDS IN NORTH CENTRAL NORTH DAKOTA ▪ H. J. Homan, GM. Linz, W. J. Bleier, and R. B. Carlson

ECOGEOGRAPHY OF SOUTHERN BOG LEMMING AND MEADOW VOLE IN NORTH CENTRAL KANSAS ▪ T. L. Welker and J. R. Choate

SUMMER AND FALL FOOD HABITS OF COYOTES IN SOUTHWESTERN NORTH DAKOTA ▪ T. L. Lewis, W. F. Jensen, K. A. Keehr, and R. W. Seabloom

MOVEMENT PATTERNS OF WHITE-TAILED DEER AT …

The Probe, Issue # 150 -- December 1994

The Probe: Newsletter of the National Animal Damage Control Association

Raccoon Rabies Epizootic - United States 1993
NPCA Concerned About Competition From ADC for Bird Control Jobs
Translocation of Wild Canids Brings Disease Threats
California Assemblyman Says "Time to Repeal Mountain Lion Initiative"
NADCA Information/Techniques Committee Wants YOU
Call for Nominations for Beiryman Institute Awards
Well! At Least We Told 'Em How It Is (1980 article), by George S. Rost

Small Polarons And The Electronic Properties Of Mo2S3, Adilgiry A. Kusov, Roger D. Kirby

Department of Physics and Astronomy: Faculty Publications

We investigate the small-polaron mechanism as a possible explanation of electrical-conduction and electrical-noise properties of the linear chain material Mo₂S₃. Experimental conductivity and noise data obtained in earlier papers [Phys. Rev. B 38, 3973 (1988); Phys. Rev. B 39, 5139 (1989)] are analyzed in terms of a small-polaron mechanism and double-well potential model. We interpret the observed electronic properties in terms of kinetic equations describing the interaction of free carriers with fluctuations of density of the lattice. Appropriate kinetics equations to describe this interaction, which leads to small-polaron formation, are derived. These equations are found to …

A Comparison Of Plotless Density Estimators Using Monte Carlo Simulation, Richard M. Engeman, Robert T. Sugihara, Larry F. Pank, William E. Dusenberry

USDA Wildlife Services: Staff Publications

We conducted an extensive simulation study to compare the performance of a large group of plotless density estimators (PDEs) to obtain clarification of their relative performance in a diversity of sampling situations. The PDEs studied included well-known ones from the literature plus some extensions and modifications introduced here. The simulations cover 96 combinations of 6 spatial patterns, 4 sample sizes, and 4 population densities. We made comparisons within classes of similar estimators, and we indicate the best-performing PDEs out of the complete set studied. Over all spatial patterns, the angle-order estimator with measurements to the third closest individual in each …

Wildlife Diseases And Humans, Robert G. Mclean

Prevention and Control of Wildlife Damage Handbook

GENERAL PRECAUTIONS
Directly Transmitted Diseases:
Rabies
Hantavirus
Trichinosis
Mosquito-borne Encephalitis
Tick-borne Diseases:
Colorado Tick Fever
Rocky Mountain Spotted Fever (Tick-borne Typhus)
Lyme Disease
Tularemia
Relapsing Fever
Personal Protection
Flea-borne Diseases
Plague
Murine Typhus Fever
Commensal Rodent-borne Diseases
Rat-bite Fever
Leptospirosis (Weil’s Disease)
Salmonellosis
Rickettsialpox
Bird-borne Diseases:
Histoplasmosis
Ornithosis
Salmonellosis

Aligned Two-Phase Magnets: Permanent Magnetism Of The Future? (Invited), Ralph Skomski

Ralph Skomski Publications

Micromagnetic calculations are used to investigate coercivity and energy products of magnets consisting of an aligned hard-magnetic skeleton phase and a soft-magnetic phase with high saturation magnetization. Compared to the present-day theoretical limit of 516 W/m³ for single-phase Nd₂Fe₁₄B, the energy product in suitable nanostructured Sm₂Fe₂N₃/Fe₆₅Co₃₅ composites is predicted to be as high as 1090 kJ/m3. The influence of the skeleton’s texture and shape is discussed, and aligned nanocrystalline two-phase magnets are compared with remanence-enhanced isotropic magnets. In particular, it is shown how the nucleation-based analytical …

Mössbauer Study Of Permanent-Magnet Materials: Sm2Fe17-XAlX Compounds, I.A. Al-Omari, Sitaram Jaswal, A.S. Fernando, David J. Sellmyer

David Sellmyer Publications

The Fe⁵⁷ Mössbauer spectra of Sm₂Fe_17-xAl_x, where x=0, 1.0, 2.0, 3.0, and 4.0, have been measured at room temperature and analyzed. The ternary compounds Sm₂Fe_17-xAl_x have the rhombohedral Th₂Zn₁₇ structure. Mössbauer measurements showed that all the compounds studied were ferromagnetic. The average hyperfine field was found to decrease with the increasing aluminum concentration, which is in qualitative agreement with magnetic measurements. The decrease in the average hyperfine field was from 224 kOe at x=0 to 174 kOe at x=4. By fitting the …

Sputtering Pressure Effects And Temperature-Dependent Magnetism Of Co/Pd Multilayers, S.Y. Jeong, Z.S. Shan, P. He, J.X. Shen, Y.B. Zhang, John A. Woollam, David J. Sellmyer

David Sellmyer Publications

The temperature dependence of the sputtering Ar pressure effects on magnetic properties and the coercivity mechanism of Co(2 Å)/Pd(13 Å) multilayers were studied as the sputtering Ar pressure varied from 3–15 mTorr and the temperature from 300 to 35 K. It is found that the roughness of the interfaces or film surface increases with increasing sputtering pressure, the anisotropy increases with decreasing temperature and increasing Ar pressure and shows a maximum at P_Ar≃12 mTorr, and the coercivity increases with Ar pressure and shows stronger temperature dependence at higher Ar pressure. The coercivity mechanism was analyzed in terms of …

Interface Alloying And Magnetic Properties Of Fe/Rh Multilayers, K. Hanisch, W. Keune, R.A. Brand, Christian Binek, Wolfman Kleemann

Christian Binek Publications

Rh(20 Å)/⁵⁷Fe(t_Fe) multilayers with Fe thicknesses t_Fe of 2, 5, 10, and 15 Å prepared by alternate evaporation in UHV have been investigated by x-ray diffraction (XRD), Mössbauer spectroscopy, and SQUID magnetometry. First- and second-order superstructure Bragg peaks (but no higher-order peaks) in small-angle XRD patterns suggest some compositional modulation. Mössbauer spectra taken at 4.2 K are characterized by a distribution P(B_hf) of hyperfine fields B_hf. Peaks observed in the P(B_hf) curves near 17 and 35 T are assigned to an fcc-RhFe interface alloy (~7–24 at. % Fe) with …

Thickness Dependence Of The Magnetic And Electrical Properties Of Fe:Sio2 Nanocomposite Films, S.S. Malhotra, Yi Liu, J.X. Shen, Sy_Hwang Liou, David J. Sellmyer

Sy-Hwang Liou Publications

Nanocomposite Fe₈₀ (SiO₂)₂₀ films with thickness from 150 to 5000 Å have been prepared by rf magnetron sputtering from a composite target. The crystallites in the Fe₈₀ (SiO₂)₂₀ films have a bcc structure with the average size of 46–66 Å which was determined by transmission electron microscopy. As indicated by the thickness dependence of resistivity, the stacking and connectivity of the crystallites depend on the thickness of the films. The magnetic properties also depend on the microstructure which changes with the thickness of the films. The magnetic coercivity of the films increases …

Devious: A Distributed Environment For Vision Tasks, Phillip R. Romig Iii, Ashok K. Samal

CSE Conference and Workshop Papers

We present a system for the integration of computer vision tasks in a distributed environment. This system, called DeViouS, is based on the client/server model and runs in a heterogeneous environment of Unix workstations. It takes advantage of the free cycles in modern workstation environments to distribute and speed up the execution of vision tasks.

Two primary goals of DeViouS are to provide a practical distributed system and a research environment for vision computing. DeViouS is based on a modular design that allows experimentation in various aspects of algorithm design, scheduling and network programming. It can make use of any …

Mössbauer, Magnetic, And Electronic-Structure Studies Of Yfe12-XMoX Compounds, I.A. Al-Omari, Sitaram Jaswal, A.S. Fernando, David J. Sellmyer, H.H. Hamdeh

David Sellmyer Publications

Mössbauer spectra, magnetization measurements, and self-consistent spin-polarized electronic structures of YFe_12-xMo_x, where x=0.5, 1.0, 2.0, 3.0, and 4.0, are reported. The ternary compounds YFe_12-xMo_x have the crystalline tetragonal ThMn₁₂ structure. Analyses of the Mössbauer spectra show that Mo atoms occupy the 8i Fe sites of the ThMn₁₂ structure, in agreement with previous observations. Room-temperature magnetic and Mössbauer measurements show that the compounds with x≤2.0 are ferromagnetic and with x≥3.0 are paramagnetic. Measurements at 25 K show that all the samples are magnetically ordered. The magnetic hyperfine field is …

Center For Sustainable Agricultural Systems Newsletter, November/December 1994

Center for Sustainable Agricultural Systems -- Newsletters 1993-2000

Contents:

Heidi Carter is New Education Coordinator

Rural Community Development Resources

Diversity and Sustainable Future Systems

In the Seminar Spotlight-Joel Salatin

Nebraska Ag IMPACT Project Set To Begin

Private Extension System in Argentina

Cuban Agriculture Reorients Toward Sustainability

Resource Guide On Sustainable Ag Materials

Biotechnology and Sustainable Agriculture: A Bibliography

California Passes BIOS Bill

EPA Conducts Special Review of Triazines

Criteria for Judging Relevancy Of Research To Sustainable Ag

Anisotropy And Magneto-Optical Properties Of Sputtered Co/Ni Multilayer Thin Films, Y.B. Zhang, John A. Woollam, Z.S. Shan, J.X. Shen, David J. Sellmyer

David Sellmyer Publications

Several series of sputtered Co/Ni multilayer thin films have been investigated. The volume and interface contributions to the magnetic anisotropy were determined from magnetization measurements, and the interface anisotropy, K_i= 0.23 ± 0.03 erg/cm², was found to support perpendicular magnetic anisotropy. The anisotropy constant, K, increased with the Au buffer layer thickness, indicating the buffer layer was crucial to the perpendicular magnetic anisotropy. The polar Kerr rotation and coercivity as a function of temperature, and room temperature magneto-optical figure of merit are presented in this paper.

Binary-Encounter-Dipole Model For Electron-Impact Ionization, Yong-Ki Kim, M. Eugene Rudd

M. Eugene Rudd Publications

A theoretical model, which is free of adjustable or fitted parameters, for calculating electron impact ionization cross sections for atoms and molecules is presented. This model combines the binary-encounter theory with the dipole interaction of the Bethe theory for fast incident electrons. The ratios of the contributions from distant and close collisions and interference between the direct and exchange terms are determined by using the asymptotic behaviors predicted by the Bethe theory for ionization and for stopping cross sections. Our model prescribes procedures to calculate the singly differential cross section (energy distribution) for each subshell using the binding energy, average …

The Probe, Issue # 149 -- November 1994

The Probe: Newsletter of the National Animal Damage Control Association

Guidelines for euthanasia of domestic animals by firearms J. (Al) Longair, Gordon G. Finley, Marie-Andree Laniel, Clayton MacKay, Ken Mould, Ernest D. Olfert, Harry Rowsell, Allan Preston
What is NADCA's Role in NWCO Certification?
Setting Prices for Animal Damage Control Services
Saccharin Samaritans
Part 2: Hantavirus Prevention
NADCA Region 4 Director Moves to Texas
Trapping Weasels

Nanostructures Of Sm-Co On Cr Thin Films, Yi Liu, B. W. Robertson, Z.S. Shan, S. Malhotra, M.J. Yu, S.K. Renukunta, Sy_Hwang Liou, David J. Sellmyer

Sy-Hwang Liou Publications

The nanostructures of Sm-Co on Cr thin films prepared by dc magnetron sputtering were investigated by high resolution transmission electron microscopy (HRTEM) and diffraction techniques. HRTEM micrographs show that the crystallites in the Sm-Co films, as revealed by the lattice fringes, are distributed discontinuously in the matrix. The matrix is amorphous as indicated by the microdiffraction study. The size of the crystallites is in the range of 2~5 nanometers. The volume fraction of the crystallites in the film decreases from 91% to 54% as the argon pressure is increased from 5 mTorr to 30 mTorr. Micrographs recorded in a bright …

Resonant Photoemission Studies Of Thickness Dependence Of The Unoccupied Gd 5d Bands, Peter A. Dowben, Dongqi Li, Jiandi Zhang, M. Onellion

Peter Dowben Publications

Ultrathin Gd films have been studied with constant initial-state spectroscopy (CIS) of photoemission utilizing linearly polarized light of synchrotron radiation. The photoemission cross-section of the 5d surface state near EF shows strong photon energy dependence, i.e., sharp peaks in CIS spectra near the Gd 5p_1/2 adsorption edge. These peaks originate from resonant photoemission processes involving the occupied 5p and unoccupied 5d levels of the surface atoms. The symmetry of the unoccupied states were determined experimentally by changing the polarization of light, where p-polarized light excites only to the unoccupied d_z² or d_xz,yz states and s-polarized light …

Rainfall Patterns For India’S Karnataka State Show Above-Normal Precipitation For 1994-98, M. B. Rajegowda, D. M. Gowda

Drought Network News (1994-2001)

The Karnataka state, confined roughly within 11.5° N and 18.5° N latitude and 74° E and 78.5° E longitude, is situated on a table land at the point where the western and eastern Ghat range enclose the Nilgiri hill complex. It is enclosed by chains of mountains to its west, east, and south. The state consists mainly of plateau, with a higher elevation of 600 to 900 m amsl in small portions of the extreme north and northwest Karnataka and the whole of the southern half, an elevation of 300 to 600 m amsl in the north, and an elevation …

Water Current, Volume 26, No. 5, October 1994

Water Current Newsletter

Festival of Color Draws Crowd
From the Director
Glossary of Water-Related Terms
Fact Sheets Describe MSEA Research
Tour Participants Flooded with Impressions
Sharing Water: Farms, Cities and Ecosystems
Toward a Water Ethic
Flood Stress Lingers

Drought Vulnerability Of Rainfed Crops In Semiarid Tropics In India: New Methods Of Determining Rainfall Variability, U. S. Victor, N. N. Srivastava, P. Vijay Kumar

Drought Network News (1994-2001)

In dryland areas of India, rainfall is the main source of water for raising crops. For these areas, the greatest problem is not water shortage per se, but rather the tremendous variability in rainfall from year to year and season to season. In planning for the coming season, we currently have little or no ability to predict the date of the onset of rains or their amount, distribution, or duration. However, uncertainty about rainfall is lessened when information is available concerning the possible variability and frequencies of historical occurrences of rainfall. This information can be obtained by coupling water use …

The Probe, Issue # 148 -- October 1994

The Probe: Newsletter of the National Animal Damage Control Association

Hantavirus: prevention is the best defense, by Suzanne Graham for Pacific Northwest Station (Reprinted from Forestry Research West, Sept. '94 issue, USDA Forest Service
A Call for Praxis
Evaluate the Technique's Financial Practicality
Mixed Results Using Propane Exploders to Repel Deer
Revised Damage Handbook Available
Trapping Weasels, by James E. Forbes, President, NADCA
Internships Available with the Wildlife Management Department of NRA
The NADCA Employment Committee has been created and is open for business. Committee members are James E. Forbes, Chairman, and Chris Engel.

Canadian Cooperative Wildlife Health Centre, Volume 2-3, Fall 1994

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

Conditions Encountered in Hunter-Killed Game
Canine Distemper in New Hosts
Hantavirus Pulmonary Syndrome in British Columbia
Avian cholera and predation in nesting common eiders in New Brunswick
Drowning in northern gannets
Fetal mummification in beaver
Prevalence of oral papilloma in White suckers
Tyzzer diseases in muskrats
Hepatic carcinoma in an Atlantic tomcod
Intestinal adenocarcinoma in a beluga whale
Botulism in Ring-billed Gulls
Lead Poisoning in Loons
Miscellaneous
Tiger salamander die-off
Botulism outbreak in Alberta
Waterbird mortality in Saskatchewan
Carbofuran poisoning in Saskatchewan

Novel Methods For The Fabrication Of Ferromagnetic Nickel And Nickel Boride Thin Films, D. Zych, A. Patwa, S.S. Kher, N.M. Boag, Peter A. Dowben

Peter Dowben Publications

Metal-rich nickel boride thin films fabricated from boron-containing precursor compounds by a cluster deposition process are shown to be ferromagnetic. The metal-rich films fabricated by this approach exhibit hysteresis curves similar to those obtained for pure nickel foils. These films are a mixture of pure nickel and the Ni₃B nickel boride phases. It is postulated that the hysteresis curves with smaller remnant magnetizations obtained from these films are a consequence of Ni₃B inclusions within the films. Other novel organometallic source compounds for nickel chemical-vapor deposition are briefly reviewed. Journal of Applied Physics is copyrighted by The …

The Prairie Naturalist Volume 26. No. 3. September 1994

The Prairie Naturalist

BREEDING RANGE AND POPULATION STATUS OF LESSER PRAIRIE-CHICKENS IN COLORADO ▪ K. M. Giesen

LESSER PRAIRIE-CHICKEN MOVEMENTS AND HOME RANGES IN NEW MEXICO ▪ T. Z. Riley, C. A. Davis, M. A. Candelaria, and H. R. Suminski

WATERFOWL PRODUCTIVITY AND USE OF NESTING STRUCTURES IN THE PRAIRIE POTHOLE REGION ▪ R. R. Johnson, K. F. Higgins, I. J. Ball. and S. C. Kohn

A COMPARISON OF PERCH USE BY VOCALIZING EASTERN AND WESTERN MEADOWLARKS ▪ K. A. Kinstler and T. A. Sordahl

FARM OPERATOR ATTITUDES TOWARD WHITE-TAILED DEER AT SAND LAKE NATIONAL WILDLIFE REFUGE, SOUTH DAKOTA ▪ D. E. Naugle. …

Center For Sustainable Agricultural Systems Newsletter, September/October 1994

Center for Sustainable Agricultural Systems -- Newsletters 1993-2000

Contents:

New UNL Center for Grassland Studies

BioNet Bulletin Board

New NSAS Director and New Extension Director

What Happens to Pesticides in Soil and Water?

In the Seminar Spotlight

Paul Thompson

Joel Salatin

Symposium to Focus on Future of Great Plains

Farm Bill Focus of midwest Governors' Conference

Ag Waste Database

Sustainable Development Framework for the Great Plains

USDA Drafting National Organic Standards

Environmental Reserve Proposed

Sustainable Ag Directors Workshop on February

EPA and USDA Agreement on Pest Management

Congress Approves Funding for Sustainable Ag and Related Programs

President Clinton's Sustainable Development Awards

Futuristic Symposium at ASA Meetings