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1985

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Articles 1 - 30 of 1072

Full-Text Articles in Physical Sciences and Mathematics

Structure Of A Rigid Smooth Space Curve, Chia-Hoang Lee Dec 1985

Structure Of A Rigid Smooth Space Curve, Chia-Hoang Lee

Department of Computer Science Technical Reports

No abstract provided.


Nearshore And Surf-Zone Morphodynamics: A Global Environmental Model For Predicting Hazards And Changes. Appendix 6. Standing Waves On A Pronounced Bar Trough Beach, Nungjane C. Shi, L. D. Wright Dec 1985

Nearshore And Surf-Zone Morphodynamics: A Global Environmental Model For Predicting Hazards And Changes. Appendix 6. Standing Waves On A Pronounced Bar Trough Beach, Nungjane C. Shi, L. D. Wright

Reports

The hypothesis that a pronounced bar-trough surf zone topography favors resonance of standing waves with antinodes located over the bar is examined. Numerical and field investigations of standing waves in a bar-trough surf zone suggest a selective trapping of wave energy at specific resonant frequencies in the subharmonic and the high frequency infragravity bands and a possible suppression of lower frequencies. The resonant frequencies predicted by the numerical model remain fairly constant throughtout the tidal cycle due to the small tidal range typically associated with a bar-trough beach. Cross-shore bar migration changes the resonant frequencies. Numerical simulations show that an ...


Nearshore And Surf-Zone Morphodynamics : A Global Environmental Model For Predicting Hazards And Changes, L. D. Wright, N. C. Shi, J. D. Boon Iii Dec 1985

Nearshore And Surf-Zone Morphodynamics : A Global Environmental Model For Predicting Hazards And Changes, L. D. Wright, N. C. Shi, J. D. Boon Iii

Reports

The long-term goal of the project has been to develop improved, accurate predictability of nearshore, surf zone, and beach hydrodynamic and morphologic assemblages, based on lucidation of the universal principles governing nearshore and surf zone morphodynamic behavior.


Generation Of Configuration Space Obstacles I: The Case Of A Moving Sphere, Chanderjit Bajaj, Myung-Soo Kim Dec 1985

Generation Of Configuration Space Obstacles I: The Case Of A Moving Sphere, Chanderjit Bajaj, Myung-Soo Kim

Department of Computer Science Technical Reports

No abstract provided.


Site Recovery In Replicated Distributed Database Systems, Bharat Bhargava Dec 1985

Site Recovery In Replicated Distributed Database Systems, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.


Total Refraction At Oblique Incidence By A Transparent Bilayer Coating On A High-Index Transparent Or Absorbing Substrate, R. M.A. Azzam, Karim Javily Dec 1985

Total Refraction At Oblique Incidence By A Transparent Bilayer Coating On A High-Index Transparent Or Absorbing Substrate, R. M.A. Azzam, Karim Javily

Electrical Engineering Faculty Publications

Transparent bilayer coatings that produce total refraction (TR) of obliquely incident monochromatic light into an underlying substrate are considered. When the substrate is transparent, it is shown that TR takes place without any accompanying change of polarization. Totally refracting bilayers are realizable in the IR where high-refractive-index substrates are available. This is illustrated by a BaF2–ZnSe bilayer on a Ge substrate at a 10.6-μm (CO2-laser) wavelength and 45° angle of incidence. Limited changes of the angle of incidence, wavelength, and refractive indices and thicknesses of the two films of the bilayer are introduced, and their ...


Bowen Fluoresence And He Ii Lines In Active Galaxies And Gaseous Nebulae, Hagai Netzer, Moshe Elitzur, Gary J. Ferland Dec 1985

Bowen Fluoresence And He Ii Lines In Active Galaxies And Gaseous Nebulae, Hagai Netzer, Moshe Elitzur, Gary J. Ferland

Physics and Astronomy Faculty Publications

We have calculated the intensity of He II and the O III and N III Bowen lines under a variety of astrophysical conditions. Our line-transfer method is based on the escape probability formalism and is especially suitable for combining line fluorescence and photoionization calculations in a simple, straightforward way. It reproduces the results of the more sophisticated line-transfer calculations quite accurately and is much better for producing realistic ionization and thermal structures. An extensive grid of models is presented and discussed, with special emphasis on the case of active galactic nuclei (AGNs). Many O III and N III Bowen lines ...


Hydrocarbon Levels In Tampa Bay Final Report, Larry J. Doyle, Edward S. Van Vleet, William M. Sackett, Norman J. Blake, Gregg R. Brooks Dec 1985

Hydrocarbon Levels In Tampa Bay Final Report, Larry J. Doyle, Edward S. Van Vleet, William M. Sackett, Norman J. Blake, Gregg R. Brooks

Reports

The primary purpose of this project was to establish and characterize, as far as possible, hydrocarbon base levels for the Tampa Bay Estuary. In addition, we were to characterize 1) hydrocarbon molecular compositions, 2) the isotopic composition of total and lipid sediment organic carbon, and 3) evaluate the potential for utilizing isotopic analyses to quantify and determine the extent of future oil spills.


A Brief Chronology Of Some Events Related To Cancellation/Suspension Of The Predacides (Compound 1080, Strychnine, Sodium Cyanide) By The Environmental Protection Agency In 1972 And Ensuing Actions By Federal And State Agencies., Dale A. Wade Dec 1985

A Brief Chronology Of Some Events Related To Cancellation/Suspension Of The Predacides (Compound 1080, Strychnine, Sodium Cyanide) By The Environmental Protection Agency In 1972 And Ensuing Actions By Federal And State Agencies., Dale A. Wade

Great Plains Wildlife Damage Control Workshop Proceedings

Covers 1964-1986


Biogeochemical Processes In Sagebrush Ecosystems: Interactions With Terrain, United States, National Aeronautics And Space Administration Dec 1985

Biogeochemical Processes In Sagebrush Ecosystems: Interactions With Terrain, United States, National Aeronautics And Space Administration

Plants

Field data collection to support analysis of TM data was accomplished from June 22 to August 28th. Color infrared aerial photography acquired by a U2 on June 12, 1985 was used to locate and identify several vegetation communities. Forty sites where the USFS has collected long term ground cover were located in the field, delineated on aerial photos and ground photos of current conditions taken.


Efficient Plane Sweeping In Parallel, Mikhail J. Atallah, Michael T. Goodrich Dec 1985

Efficient Plane Sweeping In Parallel, Mikhail J. Atallah, Michael T. Goodrich

Department of Computer Science Technical Reports

No abstract provided.


The Virginius Vein Ore Deposit, Northwestern San Juan Mountains, Colorado: A Study Of The Mineralogy, Structure, And Fluid Inclusions Of An Epithermal Base-Metal And Silver Vein In A Volcanic Environment, Berton Woodward Coxe Dec 1985

The Virginius Vein Ore Deposit, Northwestern San Juan Mountains, Colorado: A Study Of The Mineralogy, Structure, And Fluid Inclusions Of An Epithermal Base-Metal And Silver Vein In A Volcanic Environment, Berton Woodward Coxe

Earth and Planetary Sciences ETDs

The Virginius ore deposit, Ouray and San Miguel Counties, Colorado, yielded 14.5 million oz of silver between 1880 and 1912. The deposit consists of several quartz, base-metal, and silver mineralized fissures which is hosted by Tertiary volcanic rocks of the San Juan volcanic field and was deposited in fractures radial to the northwest margin of the Silverton caldera.

Four stages of mineralization have been recognized: (I) quartz, galena, sphalerite, chalcopyrite, and argentiferous tetrahedrite; this stage comprises a bulk of the total vein material and all of the silver; (II) rhodonite, rhodochrosite, quartz, magnetit, galena, chalcopyrite, and pyrite; this stage ...


Aggressive Behavior Of Mississippi Kites In Suburban Areas, Berkeley R. Peterson, Charles S. Brown Dec 1985

Aggressive Behavior Of Mississippi Kites In Suburban Areas, Berkeley R. Peterson, Charles S. Brown

Great Plains Wildlife Damage Control Workshop Proceedings

The Mississippi Kite is a small diurnal bird of prey which nests throughout the southern Great Plains. Its aggressive behavior during nesting has created problems for residents in suburban areas. The removal of the nest and relocation of the eggs and young will end the attacks by the parent birds. The eggs are incubated and the resulting young, as well as other young removed from problem nests, are then placed in foster nests in more remote areas.


Livestock Guarding Dogs Protect Domestic Sheep From Coyote Predation In Kansas, William F. Andelt Dec 1985

Livestock Guarding Dogs Protect Domestic Sheep From Coyote Predation In Kansas, William F. Andelt

Great Plains Wildlife Damage Control Workshop Proceedings

Sheep (Ovis aries) producers were surveyed in Kansas to determine the efficacy of livestock guarding dogs (Canis familiaris) for protecting sheep from coyote (Canis latrans) predation. The majority of producers rated their guard dogs' predator control performance as good or excellent, indicating. that the dogs reduced their reliance on other control methods and substantially reduced monetary losses.


Wildlife Damage Control Program Needs Of County Extension Agents In Colorado, William F. Andelt Dec 1985

Wildlife Damage Control Program Needs Of County Extension Agents In Colorado, William F. Andelt

Great Plains Wildlife Damage Control Workshop Proceedings

County extension agents in Colorado indicated that extension bulletins were the most important type of assistance needed for their clientele in the area of wildlife damage control. County extension agents indicated that pocket gophers, prairie dogs, skunks, and coyotes were the most important of 32 species requiring extension information for their clientele.


Wildlife Damage In Australia: Constructive Contrasts With The United States, Terrell P. Salmon Dec 1985

Wildlife Damage In Australia: Constructive Contrasts With The United States, Terrell P. Salmon

Great Plains Wildlife Damage Control Workshop Proceedings

There are numerous wildlife damage problems in Australia. The major pests include rabbits (Oryctolagus cuniculus), foxes (Vulpes vulpes), starlings (Sturnus vulgaris), feral cats (Felis catus), donkeys (Equus asinus), goats (Capra hircus), buffalo (Bubalus trutralis), pigs (Sus scrofa), all of which have been introduced. The dingo (Canis familiaris dingo), classified as being a native species by most people, is the primary native animal causing problems, although others, such as kangaroos and several native bird species, are pests in some areas. The Australians spend considerable amounts of money on wildlife damage control research. The people of Western Australia take a regulatory approach ...


Preliminary Studies On The Feasibility Of Urban Rabies Control, Richard C. Rosatte Dec 1985

Preliminary Studies On The Feasibility Of Urban Rabies Control, Richard C. Rosatte

Great Plains Wildlife Damage Control Workshop Proceedings

A preliminary investigation was initiated in 1984 to determine the feasibility of an urban rabies control strategy which involved capturing, vaccinating and releasing skunks and raccoons in metropolitan Toronto, Ontario. Results indicate urban skunks and raccoons are utilizing extremely small home ranges and their movements are not extensive. Trapping data suggested a large proportion of the population of skunks and raccoons in the study area were captured during the first 4 nights of trapping. Capture data also indicated the presence of new animals in the study areas between trapping periods. The 3 study areas, which differed in human land-use classification ...


Deer Damage Prevention Efforts In Pennsylvania, Jack M. Payee, William L. Palmer Dec 1985

Deer Damage Prevention Efforts In Pennsylvania, Jack M. Payee, William L. Palmer

Great Plains Wildlife Damage Control Workshop Proceedings

Research at the Pennsylvania State University was directed towards finding effective repellents to control damage caused by white-tailed deer (Odocoileus virginianus) and to develop a low-cost alternative to the traditional 2.4 m woven wire barrier fence, considered to be deer-proof, but too expensive for mgt agricultural uses. Fourteen repellents were screened and 9 were found to be more effective than the others. These 9 repellents were further investigated under semi-field conditions and only 1 repellent was found to be consistent in reducing deer feeding. A vertical electric deer fence was effective in excluding deer at field sites containing alfalfa ...


Preliminary Field Evaluation Of A New Formulation Of Rozol ( Chlorophacinone ) Bait Against Pocket Gophers In Colorado, John A. Baroch, Richard M. Poche Dec 1985

Preliminary Field Evaluation Of A New Formulation Of Rozol ( Chlorophacinone ) Bait Against Pocket Gophers In Colorado, John A. Baroch, Richard M. Poche

Great Plains Wildlife Damage Control Workshop Proceedings

Mountain pocket gophers (Thomomy's talpoides) and plains pocket gophers (Geomys bursarius) are a problem to rangelands in Colorado. A new chlorophacinone (50 ppm) pelleted bait was applied to active burrow systems by hand baiting. Efficacy on the Geomys plot was 100%, while 94.73% of the Thomomys were controlled with the product.


Pesticide Registration In The United States, Dale A. Wade Dec 1985

Pesticide Registration In The United States, Dale A. Wade

Great Plains Wildlife Damage Control Workshop Proceedings

This review provides an abbreviated history of pesticide regulation in the United States, with a summary of the current registration process and exceptions under the authority of the Environmental Protection Agency and the Federal Environmental Pesticide Control Act of 1972, as amended. Issues related to registration are briefly described.


Coyote Vulnerability To Several Management Techniques, Frederik F. Knowlton, Lamer A. Windberg, Cram E. Wahlgren Dec 1985

Coyote Vulnerability To Several Management Techniques, Frederik F. Knowlton, Lamer A. Windberg, Cram E. Wahlgren

Great Plains Wildlife Damage Control Workshop Proceedings

We appreciate this opportunity to present a brief synopsis of a complex field study recently completed near Laredo, Texas. It provides a preliminary assessment of differences in coyote vulnerability to several management tools At this point, our analyses are incomplete and interpretations are tentative, at best nonetheless, the data provide some insights and a basis for speculations and questions about coyote behavior, population processes, and the logistics of coyote population reduction. This research was sponsored by the U.S. Fish and Wildlife Service (through the Predator Ecology and Behavior Project) and the Caesar Kleberg Wildlife Research Institute, with generous assistance ...


Reported Beaver Damage And Control Methods Used In Texas, Jan E. Loven Dec 1985

Reported Beaver Damage And Control Methods Used In Texas, Jan E. Loven

Great Plains Wildlife Damage Control Workshop Proceedings

Beaver have greatly increased their range in Texas due to restocking and construction of man-made water impoundments. Damages can generally be categorized into dike and impoundment damage, tree damage, and flooding or other damages. These total $9,326,541 for the fiscal years 1983, 1984, and 1985. Methods used to remove beaver include: conibear traps, leg-hold traps, snares, spotlighting, and technical consultation. Live traps are seldom used. Total number of beaver taken for fiscal years 1983, 1984 and 1985 is 5,158.


Incidence And Significance Of Giardia Lamblia (Lambl ) In Texas Beaver Populations, Robert Beach, William F. Mcculloch Dec 1985

Incidence And Significance Of Giardia Lamblia (Lambl ) In Texas Beaver Populations, Robert Beach, William F. Mcculloch

Great Plains Wildlife Damage Control Workshop Proceedings

The Giardia lamblia (Lambl) protozoan is not a recently discovered parasite. It was. in fact, one of the first organisms viewed and described by Antony van Leeuwenhoek (1681) as he designed the first usable microscope. Leeuwenhoek found this organism in a sample of his own diarrhetic stool and thus he constitutes the first confirmed case of human giardiasis. His finding represents proof of glardiasis’ close association with man for many years. Leeuwenhoek’s discovery of the giardial trophozoite was not elaborated on for some 178 years, however, as it was not until 1859 that Wilhelm D. Lambl systematically described the ...


Seventh Great Plains Wildlife Damage Control Workshop Proceedings Dec 1985

Seventh Great Plains Wildlife Damage Control Workshop Proceedings

Great Plains Wildlife Damage Control Workshop Proceedings

Table of Contents


The Use Of Fixed Wing Aircraft In Predator Control, Larry D. Vetterman Dec 1985

The Use Of Fixed Wing Aircraft In Predator Control, Larry D. Vetterman

Great Plains Wildlife Damage Control Workshop Proceedings

Aerial hunting was first used in a professional predator control program in 1942. The most popular aircraft used by animal damage control agencies is the Piper PA-18. Proper training of flight crews is of utmost importance for a successful aerial operation. Fixed wing hunting is restricted to relatively open areas and flat terrain. Aerial hunting is an excellent control method where livestock losses are severe and immediate control is needed.


Wildlife Damage Control Program Needs Of County Extension Agents In Colorado, William F. Andelt Dec 1985

Wildlife Damage Control Program Needs Of County Extension Agents In Colorado, William F. Andelt

Great Plains Wildlife Damage Control Workshop Proceedings

County extension agents in Colorado indicated that extension bulletins were the most important type of assistance needed for their clientele in the area of wildlife damage control. County extension agents indicated that pocket gophers, prairie dogs, skunks, and coyotes were the most important of 32 species requiring extension information for their clientele.


Efficacy And Farmer Acceptance Of Nonlethal Control Of Blackbird Depredations To Small Grain Crops, Albert E. Bivings Dec 1985

Efficacy And Farmer Acceptance Of Nonlethal Control Of Blackbird Depredations To Small Grain Crops, Albert E. Bivings

Great Plains Wildlife Damage Control Workshop Proceedings

In 1980, Congress responded to complaints of migratory bird damage to grain crops, principally rice, with added funding for enhanced Animal Damage Control (ADC) programs in Arkansas and Louisiana. This resulted in the establishment of an office in Stuttgart, Arkansas and a similar office in Crowley, Louisiana. Enabling legislation specifically directs the principal focus to be on rice/blackbird conflicts. This paper will present a review of the problems addressed in Arkansas, techniques utilized and the author's assessment of their efficacy and acceptability.


Opening Address: The Importance Of Wildlife Damage Control In Texas, Zerle L. Carpenter Dec 1985

Opening Address: The Importance Of Wildlife Damage Control In Texas, Zerle L. Carpenter

Great Plains Wildlife Damage Control Workshop Proceedings

Let me first indicate that I have been interested in wildlife damage control programs for a good part of my life. My first experience, at the tender age of 6 years, was hard to accept when coyotes killed my 4-H pig. The importance of wildlife damage control has been clear to me since that time. Unfortunately, the importance of control is not often clear to those people who have not directly experienced wildlife damage.


Wildlife Diseases And Human Health, Keith A. Clark Dec 1985

Wildlife Diseases And Human Health, Keith A. Clark

Great Plains Wildlife Damage Control Workshop Proceedings

Zoonoses (singular, zoonosis) are diseases transmissible from animals to man. There are over 200 such diseases; many are harbored by wildlife reservoirs. A reservoir may be defined as a source which maintains the presence of a disease in an ecosystem. Wildlife-associated "zoonoses found in Texas include rabies, plague, tularemia, Rocky Mountain spotted fever, Lyme disease, leptospirosis, relapsing fever, typhus, and leprosy. The mission of the Zoonosis Control Division of the Texas Department of Health is to protect the health of Texas citizens against zoonoses. Surveillance programs for various diseases are an integral part of the overall control programs, which include ...


Current Status And Potential Registrations Of Compound 1080 And Strychnine For Rodent Control, Lyle A. Crosby Dec 1985

Current Status And Potential Registrations Of Compound 1080 And Strychnine For Rodent Control, Lyle A. Crosby

Great Plains Wildlife Damage Control Workshop Proceedings

On December 1, 1976, the Environmental Protection Agency applied Section 6 of the Federal Insecticide. Fungicide, and Rodenticide Act, "Administrative Review", in determining that the use of products containing strychnine, for above ground application to control several rodent species, met specific cancellation criteria outlined in 40 CFR 162.11. Position Document 4 (the final Agency decision), published on September 30, 1983, proposed to cancel registrations of strychnine products for above ground use to control prairie dogs and required label modification for confined use on ground squirrels. The final decision was challenged by several parties who requested a formal hearing which ...