Physical Sciences and Mathematics Commons^™

Changes In Electron-Phonon Coupling Across A Bulk Phase Transition In Copolymer Films Of Vinylidene Fluoride (70%) With Trifluoroethylene (30%), C. N. Borca, Shireen Adenwalla, Jaewu Choi, Lee Robertson, H. You, V. M. Fridkin, S. P. Palto, N. Petukhova, Stephen Ducharme, Peter A. Dowben

Peter Dowben Publications

We present evidence for a change in electron – phonon coupling across a bulk ph=e transition. Below the lattice stiffening transition at around 160 K, there is a change in the diffracted peak width observed by neutron and X-ray scattering techniques. Also, the electronic band structure of the copolymer is shifting in binding energy below 160 K, decreasing the density of states near the Fermi level. The value of the effective Debye temperature above the transition temperature is approximately 50 K, while below 160 K, the value of the Debye parameter is 245 K. We postulate that the coupling between …

First Observations Of Long-Lived Meteor Trains With Resonance Lidar And Other Optical Instruments, M. C. Kelley, C. Gardner, J Drummond, T Armstrong, A Liu, Chu G. Papen, C Kruschwitz, P. Loughmiller, B Grime, J. Engelman

Physical Sciences - Daytona Beach

In November 1998 the earth passed through a maximum in the cometary material responsible for the yearly Leonids meteor shower. The meteor storm event produced numerous examples of long-lived chemiluminescent trails--visible to the naked eye over New Mexico, where a major observation campaign was centered. One trail was detected for over an hour with a CCD camera employing a narrow sodium filter, and many others were observed for over ten minutes each. For the first time, sodium densities in such trails were measured while also being imaged in sodium light. We have verified one source of long-lived light emissions--a sodium-catalyzed …

The Probe, Issue 211 - July/August 2000

The Probe: Newsletter of the National Animal Damage Control Association

CONTENTS:
NADCA Election Results Announced
Editor's Farewell
CALENDAR OF UPCOMING EVENTS
Bill Clay to Head Wildlife Services
Editors Farewell

Parasite Makes Rats More Vulnerable to Cats Crazed Beaver Terrorizes Farm
Mounties Don't Like Shooting Bears
Book Review: "Mammal Trapping"
PETA Attacks Wyoming License Plates

Status Survey Of Aquatic Cave Fauna In Arkansas, G. O. Graening, Arthur V. Brown

Technical Reports

No abstract provided.

Trophic Dynamics And Pollution Effects In Cave Springs Cave, Arkansas, G. O. Graening, Arthur V. Brown

Technical Reports

No abstract provided.

An Efficient Method For Band Structure Calculations In 3d Photonic Crystals, David C. Dobson, Jay Gopalakrishnan, Joseph E. Pasciak

Mathematics and Statistics Faculty Publications and Presentations

A method for computing band structures for three-dimensional photonic crystals is described. The method combines a mixed finite element discretization on a uniform grid with a fast Fourier transform preconditioner and a preconditioned subspace iteration algorithm. Numerical examples illustrating the behavior of the method are presented.

Is Information Systems A Science? An Inquiry Into The Nature Of The Information Systems Discipline, Deepak Khazanchi, Bjørn Erik Munkvold

Information Systems and Quantitative Analysis Faculty Publications

The Information Systems (IS) discipline is apparently undergoing an identity crisis. Academicians question the need for IS departments in colleges stating the absence of a core for the field and its integration within other business functions as a basis for its elimination. At the same time, many practitioners, as reflected in the US government's recent IT labor shortage report, continue to ignore IS as a distinct field of study. This article briefly outlines these and other challenges and argues that notwithstanding underlying philosophical differences, it can be concluded that IS is an emerging scientific discipline. This conclusion is reached through …

The Crest, Summer 2000, Virginia Institute Of Marine Science

Reports

Table of Contents:

• VIMS Scientists Successfully Spawn Cobia
• NMFS Faculty Position Established at VIMS
• Scientists Discover New Species of Perkinsus
• Researchers Discover New Pollutants Infiltrating Virginia Rivers
• Sea Scallop Research Resumed in June
• MARSH Project Will Help Save Tidal Wetlands
• Virginia's Changing Coastal Community - Indicators of Change
• New Pound-Net Design Spares Young Fish
• VIMS Scientist Studies Oysters in India
• American Shad Focus of Unique Study
• From the Coleman Bridge to Menai Bridge:
• VIMS Professor Leads Field-Course in Wales
• New Experimental Design Course for Teachers
• Students Teaching Students
• Horseshoe Crab Research is Timely
• Award Winning Bridge Website Receives Renewed Funding …

Issues In Managing Erosion: The Spring Timber Sale Case Study El Rito Tanger District, Carson National Forest, New Mexico, Neil W. Gray

Water Resources Professional Project Reports

The effect of logging, within the Carson National Forest in the Upper Rio Grande Basin of north central New Mexico, on soil erosion rates and downstream water quality and quantity within the acequia systems of the rios Tusas, Vallecitos and Ojo Caliente. Complicating the situation is that the Rio Tusas, of which Spring Creek is a tributary, has been identified as not meeting state water quality standards. The probable source of pollutant/threat is assessed as "rangeland agriculture" and the causes of non-support or threat status is "turbidity, siltation, reduction of riparian vegetation, streambank destabilization" (NMWQCC, 1998).

Keith County Test-Hole Logs: Nebraska Water Survey Test-Hole Report No. 51, Robert F. Diffendal Jr., James W. Goeke

Robert F. Diffendal, Jr., Publications

In 1930, the Conservation and Survey Division (CSD) of the University of Nebraska and the U.S. Geological Survey began a program of cooperative groundwater studies in Nebraska. Since then test drilling by use of rotary drilling equipment has been an integral part of that program. This report contains logs of all the test holes drilled in the county under the program as well as those drilled by the Conservation and Survey Division with financial assistance from other government agencies.

The maps in this report show the locations of all test holes drilled in the county since 1934 (Figure la–d).

Present …

An Overview Of Recreation And Parks Professional Preparation Programs In Higher Education, Jennifer Y. Mak

Management Faculty Research

The purpose of this paper is to give an overview of recreation and parks professional preparation programs in higher education. This paper will (a) help to understand the framework of recreation and parks professional preparation programs, (b) discuss the factors which influence the professional preparation outcomes, and (c) help to identify future research needs. The discussion is based on the framework for studying professional preparation programs by Stack, et al. (1986). The key element of the framework for studying recreation and parks professional preparation programs is the recreation and parks professional preparation environment which was the product of external, internal …

Synthesis And Antimalarial Activity Of Sixteen Dispiro-1,2,4,5-Tetraoxanes: Alkyl-Substituted 7,8,15,16-Tetraoxadispiro[5.2.5.2]Hexadecanes, Jonathan L. Vennerstrom, Yuxiang Dong, Walter Reed Army Institute Of Research, Arba L. Ager Jr., Hong-Ning Fu, Sheri M. Walters, James K. Wood, Geoffrey Edwards, Alexandra D. Holme, W. Graham Mclean

Chemistry Faculty Publications

Sixteen alkyl-substituted dispiro-1,2,4,5-tetraoxanes (7,8,15,16-tetraoxadispiro[5.2.5.2]hexadecanes) were synthesized to explore dispiro-1,2,4,5-tetraoxane SAR and to identify tetraoxanes with better oral antimalarial activity than prototype tetraoxane 1 (WR 148999). The tetraoxanes were prepared either by peroxidation of the corresponding cyclohexanone derivatives in H₂-SO₄/CH₃CN or by ozonolysis of the corresponding cyclohexanone methyl oximes. Those tetraoxanes with alkyl substituents at the 1 and 10 positions were formed as single stereoisomers, whereas the five tetraoxanes formed without the stereochemical control provided by alkyl groups at the 1 and 10 positions were isolated as mixtures of diastereomers. Three of the sixteen …

Neutral Beam Stopping And Emission In Fusion Plasmas. I: Deuterium Beams, H. Anderson, M. G. Von Hellermann, R. Hoekstra, L. D. Horton, A. C. Howman, R. W.T. Konig, R. Martin, Ronald E. Olson, H. P. Summers

Physics Faculty Research & Creative Works

The charge transfer reaction of neutral deuterium beams with impurities enables one of the principle quantitative diagnostic measurements of the hot core fusion plasma; that is, charge exchange spectroscopy. The complementary measurement of beam emission spectroscopy has been fruitful in motional Stark wavelength shift and fluctuation studies, but less so in using absolute measured intensities. In the last two years we have achieved substantial improvement in the quantitative analysis and agreement between the observed and modelled beam emission at the JET Joint Undertaking. This has depended on improved spectral fitting of the overlayed Dα motional Stark multiplet, self-consistent beam emission …

Simulation Of The Prereversalenhancement In The Low Latitude Vertical Drifts, C. G. Fesen, R. G. Noble, A. D. Richmond, G. Crowley, Bela G. Fejer

Bela G. Fejer

Low latitude F region ion motions exhibit strong seasonal and solar cycle dependences. The pre-reversal enhancement (PRE) in the vertical ion drifts is a particularly well-known low latitude electrodynamic feature, exhibited as a sharp upward spike in the velocity shortly after local sunset, which remains poorly understood theoretically. The PRE has been successfully simulated for the first time by a general circulation model, the National Center for Atmospheric Research thermosphere/ionosphere/electrodynamic general circulation model (TIEGCM). The TIEGCM reproduces the zonal and vertical plasma drifts for equinox, June, and December for low, medium, and high solar activity. The crucial parameter in the …

Ce-Qual-W2, Version 3, Scott A. Wells, Thomas M. Cole

Civil and Environmental Engineering Faculty Publications and Presentations

CE-QUAL-W2 is a two-dimensional water quality and hydrodynamic code supported by the U.S. Army Engineer Research and Development Center (Cole and Buchak 1995). The model has been widely applied to stratified surface water systems such as lakes, reservoirs, and estuaries and computes water levels, horizontal and vertical velocities, temperature, and 21 other water quality parameters (such as dissolved oxygen, nutrients, organic matter, algae, pH, the carbonate cycle, bacteria, and dissolved and suspended solids). A typical model grid is shown in Figure 1 where the vertical axis is aligned with gravity.

This technical note documents the development of CE-QUAL-W2, Version 3, …

Identity, Conflict And Cooperation In International River Basins, Jack V. Kalpakian

Graduate Program in International Studies Theses & Dissertations

This dissertation tests the hypothesis that water disputes cause serious conflict within and between states. It uses a structured case study approach to see whether there is a link between the independent and dependent variables. It also considers the effect of other variables on serious conflict. Specifically it addresses the effects of national identity and the othering process on conflict. The three case studies are built around rivers in the drier parts of the world. This biases the dissertation towards affirming the established mainstream hypothesis which states that water disputes cause serious conflict. In all three cases, historical animosities and …

1237+6526_Opt_Lris, Adam J. Burgasser

Publications and Research

No abstract provided.

Redshift-Distance Survey Of Early-Type Galaxies. I. Sample Selection, Properties, And Completeness, L. N. Da Costa, M. Bernardi, M. V. Alonso, G. Wegner

Dartmouth Scholarship

This is the first in a series of papers describing the recently completed all-sky redshift-distance survey of Early-type NEARby galaxies (ENEAR) carried out for peculiar velocity analysis. The sample is divided into two parts and consists of 1607 elliptical and lenticular galaxies with cz ≤ 7000 km s^-1 and with blue magnitudes brighter than m_B = 14.5 (ENEARm) and of galaxies in clusters (ENEARc). Galaxy distances based on the D_n-σ and fundamental plane (FP) relations are now available for 1359 and 1107 ENEARm galaxies, respectively, with roughly 80% based on new data gathered by …

ข่าวและกิจกรรมสิ่งแวดล้อม

Thai Environment

No abstract provided.

เปรียบเทียบแบบจำลองที่ใช้ในการทำนายการแพร่กระจายของสารมลพิษที่เกิดจากการรั่วไหลเนื่องจากอุบัติเหตุ, นพภาพร พานิช

Thai Environment

No abstract provided.

เครือข่ายความร่วมมทอแบบพหุภาคี เพื่อการจัดการสิ่งแวดล้อมที่ยั่งยืน, กิติชัย รัตนะ

Thai Environment

No abstract provided.

บทบาทขององค์กรพัฒนาเอกชนต่อการมีส่วนร่วมของประชาชน, วิทยากร เชียงกูร

Thai Environment

No abstract provided.

การวิเคราะห์โครการเชิงเศรษฐศาสตร์สิ่งแวดล้อม, พัชรี สมนันตา

Thai Environment

No abstract provided.

วิถีชีวิต กับ สิ่งแวดล้อม, นภา หลิน

Thai Environment

No abstract provided.

แนะนำโครงการของสถาบันวิจัยสภาวะแวดล้อม : การศึกษาบทบาทของกรรมการเร่งรัดพัฒนาชนบทในกระบวนการกระจายอำนาจสู่ท้องถิ่น, ทวีวงศ์ ศรีบุรี

Thai Environment

No abstract provided.

Meteor Trail Advection Observed During The 1998 Leonid Shower, Brent W. Grime, Timothy J. Kane, Alan Liu, George Papen, Chester S. Gardner, Michael C. Kelley, Craig Kruschwitz, Jack Drummond

Physical Sciences - Daytona Beach

Sodium resonance lidar observations of meteor trails are reported from the 1998 Leonid shower experimental at the Starfire Optical Range Kirtland Air Force Base, NM (35.0º N, 106.5º W ). The lidar was operating in a spatially scanning mode that allowed tracking for up to one half-hour. Three trails are presented here whose motion allowed inference of radial as well as vector wind components and apparent diffusivities. The winds are derived independently using the narrow linewidth sodium (Na) resonance Doppler lidar technique and are compared with the tracking results.

Canadian Cooperative Wildlife Health Centre Newsletter, Volume 7-1, Summer 2000

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

New Staff Member - Western/Northern Regional Centre Surveillance for West Nile Virus - Summer 2000 Dorsal-spined Larvae in Cervids Organophosphate Pesticide Poisoning of Seagulls - St. John's, Newfoundland Successful euthanasia of a juvenile fin whale Psittacosis in Wild Rock Doves Walleye myopathy The St-Lawrence beluga whale: summary of lesions detected in stranded individuals submitted for necropsy during 1999 An Epizootic of Iridovirus in Oregon Spotted Frog Tadpoles (Rana pretiosa) Epidemic Avian Cholera in Double-Crested Cormorants in Saskatchewan Winter Ticks in Stone's Sheep California Bighorn Sheep in British Columbia

Wetland Seed Banks: Research In Natural And Created Wetlands, Douglas A. Deberry, James E. Perry, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.

Almost Block Diagonal Linear Systems: Sequential And Parallel Solution Techniques, And Applications, P. Amodio, J.R. Cash, G. Roussos, R.W. Wright, G. Fairweather, I. Gladwell, G.L. Kraut, M. Paprzycki

Faculty Publications

Almost block diagonal (ABD) linear systems arise in a variety of contexts, specifically in numerical methods for two-point boundary value problems for ordinary differential equations and in related partial differential equation problems. The stable, efficient sequential solution of ABDs has received much attention over the last fifteen years and the parallel solution more recently. We survey the fields of application with emphasis on how ABDs and bordered ABDs (BABDs) arise. We outline most known direct solution techniques, both sequential and parallel, and discuss the comparative efficiency of the parallel methods. Finally, we examine parallel iterative methods for solving BABD systems. …

Roughening, Deroughening, And Nonuniversal Scaling Of The Interface Width In Electrophoretic Deposition Of Polymer Chains, Frank W. Bentrem, Ras B. Pandey, Fereydoon Family

Faculty Publications

Growth and roughness of the interface of deposited polymer chains driven by a field onto an impenetrable adsorbing surface are studied by computer simulations in (2 + 1) dimensions. The evolution of the interface width W shows a crossover from short-time growth described by the exponent beta(1) to a long-time growth with exponent beta(2) (>beta(1)) Tne saturated width increases, i.e., the interface roughens, with the molecular weight L-c, but the roughness exponent alpha (from W-s similar to L-alpha) becomes negative in contrast to models for particle deposition; cr depends on the chain length-a nonuniversal scaling with the substrate length …