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Articles 691 - 720 of 2574
Full-Text Articles in Physical Sciences and Mathematics
A Strategy For The Future Management Of The Joint Authority Northern Shark Fishery. A Discussion Paper., Tim Bray, Jo Kennedy
A Strategy For The Future Management Of The Joint Authority Northern Shark Fishery. A Discussion Paper., Tim Bray, Jo Kennedy
Fisheries management papers
This paper discusses the current status of the Joint Authority Northern Shark Fishery (JANSF), and the major issues affecting it. The main aim of the document is to present a seires of recommendations to enable effective future management of this resource. The paper provides a brief introduction to the JANSF, followed by an examination of the resource base of the fishery (primary species, stock distribution and stock assessment).
The Probe, Issue 189 – June 1998
The Probe, Issue 189 – June 1998
The Probe: Newsletter of the National Animal Damage Control Association
When Deer Are Too Dear and Elk Are Too Elegant -- Gary W. Witmer, NADCA Regional Director, Southern Rockies Region, Region 2
Understanding Home Range -- Jeff Jackson, Extension Wildlife Specialist, School of Forest Resources, University of Georgia
Notes from Nigeria: Wildlife Crop Interactions in Threatened Sahelian Wetland -- Augustine U. Ezealor, Dept. of Biological Sciences, Ahmadu Bello University, Zaria, Nigeria, and Robert H. Giles, Jr., Dept. of Fisheries and Wildlife Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0321.
Two Women Animal Rights Activists Protest Prairie Dog Control
Rats on the Rise-Urban Wildlife Control Proves to Be Bonanza …
Coercivity And Exchange Coupling In Prco:Co Nanocomposite Films, J. Ping Liu, Yi Liu, David J. Sellmyer
Coercivity And Exchange Coupling In Prco:Co Nanocomposite Films, J. Ping Liu, Yi Liu, David J. Sellmyer
David Sellmyer Publications
Magnetic hysteresis and intergrain exchange coupling in nanostructured PrCo:Co composite films have been investigated. The composite thin films were made by multilayer sputtering and subsequent annealing. It is found that the coercivity mechanism is related to film morphology, especially the Co phase fraction. Evidence for the hard-soft-phase exchange coupling has been found and high energy products have been obtained.
Emisja Związków Fluoru Z Procesów Hutnictwa Żelaza, Marian Mazur, Marek Bogacki, Robert Oleniacz
Emisja Związków Fluoru Z Procesów Hutnictwa Żelaza, Marian Mazur, Marek Bogacki, Robert Oleniacz
Robert Oleniacz
The paper presents the results of a comprehensive study of issues related to emissions of fluorine compounds from ferrous metallurgy processes carried out over the last few years. As part of this study raw materials used in these processes were analyzed in terms of fluorine content and its impact on the amount of air emissions of fluorine compounds. Also determined by measuring the concentration levels and emissions of fluorine in the gaseous and solid phase, including water-soluble compounds (considered to be toxic).
English title: Emissions of fluorine compounds from the processes of ferrous metallurgy.
A Comparative Study Of Molecular Similarity, Statistical, And Neural Methods For Predicting Toxic Modes Of Action, Steven P. Bradbury, Subhash C. Basak, Gregory D. Grunwald, George E. Host, Gerald J. Niemi
A Comparative Study Of Molecular Similarity, Statistical, And Neural Methods For Predicting Toxic Modes Of Action, Steven P. Bradbury, Subhash C. Basak, Gregory D. Grunwald, George E. Host, Gerald J. Niemi
Steven P. Bradbury
Quantitative structure–activity relationship (QSAR) models are routinely used in predicting toxicologic and ecotoxicologic effects of untested chemicals. One critical factor in QSAR-based risk assessment is the proper assignment of a chemical to a mode of action and associated QSAR. In this paper, we used molecular similarity, neural networks, and discriminant analysis methods to predict acute toxic modes of action for a set of 283 chemicals. The majority of these molecules had been previously determined through toxicodynamic studies in fish to be narcotics (two classes), electrophiles/proelectrophiles, uncouplers of oxidative phosphorylation, acetylcholinesterase inhibitors, and neurotoxicants. Nonempirical parameters, such as topological indices and …
28. Vivian Stannett, Otto Vogl, Susanne S. Stannett
Physical Properties Of The Binary Star 12 Persei, David J. Barlow, Colin D. Scarfe, Francis C. Fekel
Physical Properties Of The Binary Star 12 Persei, David J. Barlow, Colin D. Scarfe, Francis C. Fekel
Information Systems and Engineering Management Research Publications
We have obtained new radial velocities of the double-lined spectroscopic binary star 12 Persei, whose period is 331 days, and which has been resolved in recent years by speckle interferometry. We derive a solution for the orbital elements from the speckle and radial velocity data simultaneously, and find from that solution masses of 1.306 ± 0.035 and 1.172 ± 0.030 M☉ for the components, and an orbital parallax of 0farcs04224 ± 0farcs00056. We also determine spectroscopically the difference in magnitude between the components and, hence, their absolute magnitudes. We estimate their spectral types and individual colors by fitting standard-star colors …
Permitted Iron Emission Lines In The Classical T Tauri Star Dr Tauri, Georgina Beristain, Suzan Edwards, John Kwan
Permitted Iron Emission Lines In The Classical T Tauri Star Dr Tauri, Georgina Beristain, Suzan Edwards, John Kwan
Astronomy: Faculty Publications
We present a study of permitted emission lines of Fe I and Fe II in the spectrum of the high-accretion rate classical T Tauri star DR Tau. Echelle spectra collected at the 4 m Mayall telescope at Kitt Peak National Observatory between 1988 and 1992 include four epochs with red spectral coverage (~5000-6800 Å) and three with blue spectral coverage (~4000-4950 Å). A total of 62 unblended Fe I and Fe II lines are identified, their profiles are examined, and ratios of line pairs that are sensitive to column density or temperature are analyzed.
The unblended Fe profiles exhibit a …
Table Of Contents Volume Nine, Number Three, Summer 1998, Risk Editorial Board
Table Of Contents Volume Nine, Number Three, Summer 1998, Risk Editorial Board
RISK: Health, Safety & Environment (1990-2002)
Table of contents for the journal RISK: Health, Safety & Environment (ISSN: 1073-8673)
Review Of: Allan Mazur, A Hazardous Inquiry: The Rashomon Effect At Love Canal, Thomas G. Field Jr.
Review Of: Allan Mazur, A Hazardous Inquiry: The Rashomon Effect At Love Canal, Thomas G. Field Jr.
RISK: Health, Safety & Environment (1990-2002)
Review of: Allan Mazur, A Hazardous Inquiry: The Rashomon Effect at Love Canal (Harvard University Press 1998). Abbreviations,, appendices: Chron- ology and The Basics of Toxicology, bibliography, chronology, figures, index, photos, references. LC 97-44639; ISBN 0-674-74833-6 [255+xiv pp. $26.00 Cloth, 79 Garden Street; Cambridge MA 02138.]
Nuclear Waste And Native America: The Mrs Siting Exercise, M. V. Rajeev Gowda, Doug Easterling
Nuclear Waste And Native America: The Mrs Siting Exercise, M. V. Rajeev Gowda, Doug Easterling
RISK: Health, Safety & Environment (1990-2002)
Drs. Gowda & Easterling provide cross-cultural perspectives on issues of risk perception, equity and policy as they affect nuclear waste storage on Native American sites.
Review Of: Charles R. Bennett, Risks In The Environment: How To Assess Them, Penny Dean
Review Of: Charles R. Bennett, Risks In The Environment: How To Assess Them, Penny Dean
RISK: Health, Safety & Environment (1990-2002)
Review of: Charles R. Bennett, Risks in the Environment: How to Assess Them (Burloak Publications 1996). Appendices, references for the appendices, prologue. ISBN 0-9680438-0-1 [305 pp. Paper $23.95. 277 Belvenia Rd., Burlington, Ontario.]
Review Of: Leonard W. Doob, Sustainers And Sustainability, Courtney J. Merrill
Review Of: Leonard W. Doob, Sustainers And Sustainability, Courtney J. Merrill
RISK: Health, Safety & Environment (1990-2002)
Review of: Leonard W. Doob, Sustainers and Sustainability (Praeger Publishers 1995). Bibliography, index, notes. LC 95-7982; ISBN 0-275-95314-9 [167 pp. $52.95 Cloth, .88 Post Road West, Westport, CT 06881.]
Broadband Optical Observations Of Bl Lacertae During The 1997 Outburst, Terry D. Oswalt, Daniel Marshall, Tim Robishaw
Broadband Optical Observations Of Bl Lacertae During The 1997 Outburst, Terry D. Oswalt, Daniel Marshall, Tim Robishaw
Aerospace, Physics, and Space Science Faculty Publications
We present BVRI observations of BL Lacertae during its recent outburst. These observations, made during a 3 month period, cover a significant portion of the optical flare. The reduced data are displayed as light curves and broadband spectra. Changes in the spectral index are analyzed, and the results are compared with previous BL Lac observations. We find that the variations are simultaneous in the optical bands, but the higher frequency bands show a higher amplitude of variability. The spectral index is variable during the active period, and there is marginal evidence that the spectrum flattens as the source gets brighter.
Group Divisible Designs, Gbrsds And Generalized Weighing Matrices, D. G. Sarvate, Jennifer Seberry
Group Divisible Designs, Gbrsds And Generalized Weighing Matrices, D. G. Sarvate, Jennifer Seberry
Faculty of Informatics - Papers (Archive)
We give new constructions for regular group divisible designs, pairwise balanced designs, generalized Bhaskar Rao supplementary difference sets and generalized weighing matrices. In particular if p is a prime power and q divides p – 1 we show the following exist:
(i) GDD(2(p2 +p+ 1), 2(p2 +p+ 1), rp2, 2p2, λ1 = p2λ, λ2 = (p2 —p)r, m = p2 + p+ 1, n = 2), r = 1,2;
(ii) GDD(q(p+ 1), q(p+ 1), p(q – 1), p(q –1), λ1 = (q – 1)(q – 2), λ2 = (p– 1)(q – 1)2/q, m = q, n = p+1);
(iii) PBD(21, …
Bond System Security And Access Control Models, Buibing Hao, Ladislau Bölöni, Dan C. Marinescu
Bond System Security And Access Control Models, Buibing Hao, Ladislau Bölöni, Dan C. Marinescu
Department of Computer Science Technical Reports
No abstract provided.
Efficient Parallel Algorithms For Planar St-Graphs, Mikhail J. Atallah, Danny Z. Chen, Ovidiu Daescu
Efficient Parallel Algorithms For Planar St-Graphs, Mikhail J. Atallah, Danny Z. Chen, Ovidiu Daescu
Department of Computer Science Technical Reports
No abstract provided.
Lazy Algorithms In Parallel Discrete Event Simulation, Reuben Pasquini
Lazy Algorithms In Parallel Discrete Event Simulation, Reuben Pasquini
Department of Computer Science Technical Reports
No abstract provided.
Magnitude And Significance Of Carbon Burial In Lakes, Reservoirs, And Peatlands, Walter E. Dean, Eville Gorham
Magnitude And Significance Of Carbon Burial In Lakes, Reservoirs, And Peatlands, Walter E. Dean, Eville Gorham
United States Geological Survey: Staff Publications
Globally, lakes are currently accumulating organic carbon (OC) at an estimated annual rate of about 42 Tg•yr-1. Most of the OC in all but the most oligotrophic of these lakes is autochthonous, produced by primary production in the lakes. The sediments of reservoirs accumulate an additional 160 Tg annually, and peatlands contribute 96 Tg annually. These three carbon pools collectively cover less than 2% of the Earth’s surface and constitute a carbon sink of about 300 Tg•yr-1. Although the oceans cover 71% of the Earth’s surface, they accumulate OC at a rate of only about 100 …
Automated Estimation Of Relaxation For Interface Relaxation, John R. Rice, P. Tsompanopoulou, E. Vavalis
Automated Estimation Of Relaxation For Interface Relaxation, John R. Rice, P. Tsompanopoulou, E. Vavalis
Department of Computer Science Technical Reports
No abstract provided.
Hydrogen In R2Fe17 Intermetallic Compounds: Structural, Thermodynamic, And Magnetic Properties, S. Wirth, Ralph Skomski, J.M.D. Coey
Hydrogen In R2Fe17 Intermetallic Compounds: Structural, Thermodynamic, And Magnetic Properties, S. Wirth, Ralph Skomski, J.M.D. Coey
Ralph Skomski Publications
The absorption and diffusion behavior of hydrogen in iron-rich rare-earth intermetallics of the type R2Fe17 (R=Y, Sm, Gd) and the resulting changes of their magnetic properties are investigated. Intermediate hydrogen concentration indicate the solid-solution character of the hydrides. From equilibrium and nonequilibrium absorption experiments net reaction energies, bulk diffusion constants, and surface barrier energies for Sm2Fe17 are determined and discussed. The low-temperature quantum diffusion is discussed for the hydride and the corresponding nitride. The interstitial modification changes drastically the crystalline electric field in the rare-earth intermetallics. For Sm2Fe17H4 the …
On Some Finitely Based Representations Of Semigroups, Nikolay Silkin
On Some Finitely Based Representations Of Semigroups, Nikolay Silkin
Department of Mathematics: Faculty Publications
In this paper we present a method of obtaining finitely based linear representations of possibly infinitely based semigroups.
Finite Size Scaling In The Thin Film Limit, C. Waldfield, D. Welipitiya, T. Mcavoy, Peter A. Dowben, Elio Vescovo
Finite Size Scaling In The Thin Film Limit, C. Waldfield, D. Welipitiya, T. Mcavoy, Peter A. Dowben, Elio Vescovo
Peter Dowben Publications
The thickness dependent spin-polarized electronic structure of strained thin and ultrathin films of Gd is characterized by a distinct change in the critical exponent λ in the formalism of finite size scaling. The reduced critical exponent in the ultrathin films can be correlated to the increased dominance of the surface magnetic structure and the increasing paramagnetic-like behavior of the bulk. ©1998 American Institute of Physics.
Species Ratings For Landscape Tree Appraisal In Utah, Michael R. Kuhns
Species Ratings For Landscape Tree Appraisal In Utah, Michael R. Kuhns
All Current Publications
This fact sheet establishes species ratings to be used by tree appraisal experts with the trunk formula method for appraising the monetary value of trees in Utah.
Strain Induced Alteration Of The Gadolinium Surface State, C. Waldfried, D.N. Mcilroy, T. Mcavoy, D. Welipitiya, Peter A. Dowben, Elio Vescovo
Strain Induced Alteration Of The Gadolinium Surface State, C. Waldfried, D.N. Mcilroy, T. Mcavoy, D. Welipitiya, Peter A. Dowben, Elio Vescovo
Peter Dowben Publications
Strain induced alteration of the gadolinium surface state The electronic structure of strained and unstrained Gd(0001) has been studied with photoemission, inverse photoemission, and spin-polarized photoemission. A shift of the occupied majority and unoccupied minority surface states has been observed as a result of the strain, consistent with the phase accumulation model. There is a strain induced shift of the minority spin surface state across the Fermi level. ©1998 American Institute of Physics.
Dinetic And Mechanistic Investigations Of Photocatalysis : Photoreactions Of Cr(Co)6 With Alkenes, Aaron E. Dietrich
Dinetic And Mechanistic Investigations Of Photocatalysis : Photoreactions Of Cr(Co)6 With Alkenes, Aaron E. Dietrich
Honors Theses
Flash photolysis has proven to be an effective technique for determining reaction mechanisms. Upon photolysis, a CO ligand is removed from Cr(CO)6 forming the reactive molecular fragment Cr(C0)5. In the presence of alkene, L, Cr(CO)s can react to form the meta-stable intermediate Cr(C0)5L. At high L concentrations, Cr(CO)5L decays by pseudo-first-order kinetics with an observed rate constant, kobs, which is dependent on the concentration of both L and added CO. The exar.t nature of the dependence provides insight into the mechanism of the decay of Cr(C0)5L and a plot of 1/kobs vs. [L] will give the rate constants for both …
Studies Directed Toward The Enantioselective Addition Of Reformatsky Reagents To Aldimines, Lamyaa Hassib
Studies Directed Toward The Enantioselective Addition Of Reformatsky Reagents To Aldimines, Lamyaa Hassib
Honors Theses
Interest in β-amino esters and β-lactams has grown significantly due to their applications in the synthesis of compounds of pharmaceutical interest. Examples include β-lactam antibiotics such as the penicillin and carbapenem families. Because β-lactams and β-amino esters share a common pathway, methods to prepare either are often contaminated and thus complicated by the formation of the other. We have developed convenient and highly controllable method which can afford either product cleanly.
Studies Directed Toward The Enantioselective Addition Of Reformatsky Reagents To Aldimines, Lamyaa Hassib
Studies Directed Toward The Enantioselective Addition Of Reformatsky Reagents To Aldimines, Lamyaa Hassib
Honors Theses
Interest in β-amino esters and β-lactams has grown significantly due to their applications in the synthesis of compounds of pharmaceutical interest. Examples include β-lactam antibiotics such as the penicillin and carbapenem families. Because β-lactams and β-amino esters share a common pathway, methods to prepare either are often contaminated and thus complicated by the formation of the other. We have developed convenient and highly controllable method which can afford either product cleanly.
The Prairie Naturalist Volume 30, No.2 June 1998
The Prairie Naturalist Volume 30, No.2 June 1998
The Prairie Naturalist
REPRODUCTIVE SUCCESS OF SHARP-TAILED GROUSE IN CENTRAL MONTANA ▪ K. R. Bousquet and J. J. Rotella
EFFECTS OF DROUGHT ON RECLAIMED GRASSLANDS IN WESTERN NORTH DAKOTA ▪ D. R. Kirby, L. M. Stewart, K. D. Krabbenhoft, and D. J. Nilson
MALE COMMON NIGHTHAWK USE OF GRAVEL ROADS AT NIGHT ▪ R. G. Poulin, L. D. Todd, and R. M. Brigham
RESTORATION AND STATUS OF THE RUFFED GROUSE IN KANSAS ▪ R. D. Rodgers, R. W. Wells, K. E. Church, R. L. Whiteaker, M. T. McFadden, D. S. Lekie, R. A. Bergquist, H. J. Abel, and R. D. Applegate
PITFALL TRAPPING …
A Mössbauer Spectral Study Of Tb₂Fe₁₇ And The Tb₂Fe₁₇₋ₓsiₓ Solid Solutions, Dimitri Hautot, Gary J. Long, Peter C. Ezekwenna, Fernande Grandjean, D. P. Middleton, K. H. J. Buschow
A Mössbauer Spectral Study Of Tb₂Fe₁₇ And The Tb₂Fe₁₇₋ₓsiₓ Solid Solutions, Dimitri Hautot, Gary J. Long, Peter C. Ezekwenna, Fernande Grandjean, D. P. Middleton, K. H. J. Buschow
Chemistry Faculty Research & Creative Works
The Mössbauer spectra of a series of rhombohedral Tb2Fe17-xSix solid solutions, with x equal to 0, 1, 2, and 3, have been measured as a function of temperature. Although the spectra of Tb2Fe17 change substantially upon cooling from 295 to 85 K, it has been possible to fit them with a consistent seven sextet model corresponding to a basal magnetization. The spectral analysis yields reasonable hyperfine parameters and the expected changes with temperature. The resulting weighted average effective iron recoil mass of 66 g/mol and the Mössbauer temperature of 395 K are …