Physical Sciences and Mathematics Commons^™

Vertebrate Damage Management: The Future Of An Evolving Profession, Robert H. Giles Jr.

Wildlife Damage Management Conference

The author argues that an objective of a new group of people taking a systems approach to large wild animal problems should be to manage damage as a cost-reducing role within a total, profitable, long-term system, not necessarily to control the "pest." The needs are for well-grounded financial analyses both for customers, the public, the resources, and the well-being of the profession. A point of view is advanced for the need for evolving pest-related operations into a new, unique profession that is involved in a profound way as an element of a cost-effective total land and human resource production system.

Controlled Formation Of Weakly Bound Atomic Negative Ions By Electron Transfer From State-Selected Rydberg Atoms, M. Reicherts, T. Roth, A. Gopalan, M.-W. Ruf, Harmut Hotop, C. Desfrançuois, Ilya I. Fabrikant

Department of Physics and Astronomy: Faculty Publications

Using crossed atomic beams and mass spectrometric ion detection we have studied the formation of negative Ca ions in slow collisions between laser-excited state-selected Ne^**(ns; J = 2) and Ne^** (nd; J = 4) Rydberg atoms and ground state Ca atoms. The rate coefficients exhibit resonant behavior with maxima at an effective principal quantum number n^* of about 11.5 and an estimated peak value of about 10^-8 cm³ s^-1. Two different theoretical calculations, based on a curve-crossing model and on a modified adiabatic theory, respectively, yield n^{* …}

Prototype For Sontrac: A Scintillating Plastic Fiber Detector For Solar Neutron Spectroscopy, James M. Ryan, Janis Baltgalvis, D Holslin, John R. Macri, Mark L. Mcconnell, Cornelia B. Wunderer, Aaron R. Polichar

Space Science Center

We report the scientific motivation for and performance measurements of a prototype detector system for SONTRAC, a solar neutron tracking experiment designed to study high- energy solar flare processes. The full SONTRAC instrument will measure the energy and direction of 20 to 200 MeV neutrons by imaging the ionization tracks of the recoil protons in a densely packed bundle of scintillating plastic fibers. The prototype detector consists of a 12.7 mm square bundle of 250 micrometer scintillating plastic fibers, 10 cm long. A photomultiplier detects scintillation light from one end of the fiber bundle and provides a detection trigger to …

Reaction Of Dioxygen With A Cross-Conjugated Carbon-Carbon Double Bond In A Bis-Macrocycle Diiron Compound, D. Brent Macqueen, Christopher Lange, Melvin Calvin, John W. Otvos, Larry O. Spreer, Christian B. Allan, Anna Ganse, Richard B. Frankel

Physics

Dioxygen at atmospheric pressure attacks a cross-conjugated carbon-carbon double bond in a diiron complex to form two, like, keto macrocyclic iron(II) complexes. This reaction occurs with high yield in both solution and in the solid state. A dioxetane intermediate is, therefore, invoked. The rate of the reaction is very dependent on the nature of the axial ligands on the low-spin iron(II) ions in the bimetallic complex. The rate is at least a factor of 10⁴ faster with DMF ligands than with CH₃CN axial ligands. This rate dependence is explained by stabilization of a peroxo biradical transition state …

"Quadrupoled" Materials For Second-Order Nonlinear Optics, S. F. Hubbard, Rolfe G. Petschek, Kenneth D. Singer

Faculty Scholarship

We describe a new approach to second-order nonlinear optical materials, namely quadrupoling. This approach is valid in the regime of Kleinman (full permutation) symmetry breaking, and thus requires a two- or three dimensional microscopic nonlinearity at wavelengths away from material resonances. This "quadrupolar" nonlinearity arises from the second rank pseudotensor of the rotationally invariant representation of the second-order nonlinear optical tensor. We have experimentally investigated candidate molecules comprised of chiral camphorquinone derivatives by measuring the scalar invariant associated with the rank two pseudotensor using hyper-Rayleigh scattering. We have found sizable scalar figures of merit for several compounds using light for …

Nonuniversal Scaling And Conformational Crossover Of Polymer Chains In An Electrophoretic Deposition, Grace M. Foo, Ras B. Pandey

Faculty Publications

A computer simulation model of electrodeposition of polymer chains on an impenetrable wall is used to evaluate the power-law scaling exponents (ν_x(y)) for the longitudinal and transverse spread, R_gx(y)∼L_c^ν_x(y); we find that the exponents ν_x(y) depend on the field strength, i.e., they are nonuniversal. A conformational crossover is observed for the transverse spread from the bulk with ν_y≃1/3-2/3 to the wall with ν_y≃2/3-1. A similar crossover also occurs for the longitudinal component of R_g but with an opposite trend, i.e., magnitude of ν_x is larger …

The I Band Tully-Fisher Relation For Cluster Galaxies: Data Presentation., Riccardo Giovanelli, Martha P. Haynes, Terry Herter, Nicole P. Vogt, Gary Wegner, John J. Salzer, Luiz N. Da Costa, Wolfram Freudling

Dartmouth Scholarship

Observational parameters which can be used for redshift-independent distance determination using the Tully-Fisher (TF) technique are given for 782 spiral galaxies in the fields of 24 clusters or groups. I band photometry for the full sample was either obtained by us or compiled from published literature. Rotational velocities are derived either from 21 cm spectra or optical emission line long--slit spectra, and converted to a homogeneous scale. In addition to presenting the data, a discussion of the various sources of error on TF parameters is introduced, and the criteria for the assignment of membership to each cluster are given.

The Impact Of Multimedia Training On Mental Models Of Simple Processes, Johnny L. Washington, Erika Rogers

Computer Science and Software Engineering

The purpose of this paper is to describe work in progress on a project which is designed to study how multimedia training may impact people’s mental models of sample processes. A tutorial is under development which helps people learn how to construct an abstract model of the steps needed to produce a letter on a typewriter, and how to change this model when the task moues to a computerized setting. Subjects have been recruited to participate in this study, and the current status of the project is discussed.

Outbreak Agent: Intelligent Wearable Technology For Hazardous Environments, Erika Rogers, Robin R. Murphy, Chris Thompson

Computer Science and Software Engineering

The topic of this paper is a project to design an intelligent agent which supports humans in the domain of hazardous site investigation. This software agent will be integrated into wearable technology which is embedded in the protective clothing worn by the humans. An overview of some of the design issues is presented, with a particular emphasis on the visual problem solving component.

Determination Of The Preexponential Frequency Factor For Superparamagnetic Maghemite Particles In Magnetoferritin, Bruce M. Moskowitz, Richard B. Frankel, Sarah A. Walton, Dominic P. E. Dickson, K. K. W. Wong, T. Douglas, Stephen Mann

Physics

Magnetization and Mössbauer measurements on maghemite particles with an average particle diameter of 10 nm have been made in the temperature range from 5 K to 353 K spanning the superparamagnetic (SPM) and stable single domain (SD) regimes. The maghemite particles were produced within the iron-storage protein ferritin, resulting in a narrowly-sized, weakly interacting nanocomposite material called magnetoferritin. Experiments combining hysteresis measurements, low temperature remanence, and Mössbauer spectroscopy were used to characterize magnetoferritin and to provide experimental estimates of (1) the pre-exponential frequency factor ƒ₀ in the Néel-Arhennius relaxation equation; (2) the SPM threshold size at room temperature for …

Observation Of Laser Satellites In A Plasma Produced By A Femtosecond Laser Pulse, S.A. Pikuz, Anatoly Maksimchuk, Donald Umstadter, M. Nantel, I. Yu. Skobelev, A. Ya. Faenov, A. Osterheld

Donald Umstadter Publications

Laser satellites are detected in the emission spectra of magnesium and aluminum plasmas produced by femtosecond laser pulses. This is made possible by the realization of picosecond time resolution in a highluminosity x-ray spectrograph with a spherically curved mica crystal. The temporal characteristics of these newly recorded spectral lines show unequivocally that they are formed as a result of nonlinear processes.

Automated Classification Of Stellar Spectra. Ii: Two-Dimensional Classification With Neural Networks And Principal Components Analysis, Ted Von Hippel, Coryn A.L. Bailer-Jones, Mike Irwin

Publications

We investigate the application of neural networks to the automation of MK spec- tral classification. The data set for this project consists of a set of over 5000 optical (3800–5200°A) spectra obtained from objective prism plates from the Michigan Spec- tral Survey. These spectra, along with their two-dimensional MK classifications listed in the Michigan Henry Draper Catalogue, were used to develop supervised neural network classifiers. We show that neural networks can give accurate spectral type classifications (68 = 0.82 subtypes, rms= 1.09 subtypes) across the full range of spectral types present in the data set (B2–M7). We show also that …

Liquid-Liquid Immiscibility In Lipid Monolayers, John P. Hagen, Harden M. Mcconnell

Chemistry and Biochemistry

Some binary lipid mixtures form coexisting liquid phases when spread at the air/water interface. This work describes the pressure–composition phase diagrams of binary mixtures of four unsaturated phosphatidylcholines with dihydrocholesterol. These four binary mixtures have critical compositions of approximately fifty mole percent, and average critical exponents of 0.25±0.07. The data can also be approximated by a regular solution thermodynamic model, yielding parameters for the non-ideality of these mixtures.

Cytochrome P450 And Organochlorine Contaminants In Black-Crowned Night-Herons From The Chesapeake Bay Region, Usa, Barnett A. Rattner, Mark J. Melancon, Clifford P. Rice, Walter Riley Jr., John D. Eisemann, Randy K. Hines

United States Department of Agriculture Wildlife Services: Staff Publications

Black-crowned night-heron (Nycticorax nycticorax) offspring were collected from a relatively uncontaminated coastal reference site (next to Chincoteague National Wildlife Refuge, VA, USA) and two sites in the Chesapeake Bay watershed (Baltimore Harbor, MD and Rock Creek Park, Washington, DC, USA). Hepatic microsomal activities of benzyloxyresorufin-O-dealkylase and ethoxyresorufin-O-dealkylase were significantly elevated (up to sixfold and ninefold induction, respectively) in pipping embryos from the Baltimore Harbor colony compared to the reference site, whereas values in embryos from the Rock Creek Park colony were intermediate. Concentrations of organochlorine pesticides and metabolites in pipping embryos from both sites …

Multiple Outcomes In Health Services Research: Hypothesis Tests And Power, Donald C. Martin, Paula Diehr, Thomas D. Koepsell, Stephan D. Fihn

UW Biostatistics Working Paper Series

Health services research often is directed towards making small improvements in a number of outcomes that reflect many aspects of the patient’s life rather than a large improvement in a single well defined outcome. A researcher might choose five scales to measure different aspects of treatment outcomes and not expect any large treatment differences on any single outcome measure. O’Brien (1984) has proposed a nonparametric statistical procedure which is particularly well suited to this type of problem and that can result in considerable increases in statistical power. This paper will briefly review O’Brien’s pooled rank method and develop power calculations. …

Assembly And Disassembly Of Dna Polymerase Holoenzyme, Daniel J. Sexton, Anthony J. Berdis, Stephen J. Benkovic

Chemistry Faculty Publications

The complex task of genomic replication requires a large collection of proteins properly assembled within the close confines of the replication fork. The mechanism and dynamics of holoenzyme assembly and disassembly have been investigated using steady state and pre-steady state methods as opposed to structural studies, primarily due to the intrinsic transient nature of these protein complexes during DNA replication. The key step in bacteriophage T4 holoenzyme assembly involves ATP hydrolysis, whereas disassembly is mediated by subunit dissociation of the clamp protein in an ATP-independent manner.

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 13, Number 8, October 1997, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A twelve page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Resource Law Notes Newsletter, No. 41, Fall Issue, Aug. 1997, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.

Two-Dimensional Spectral Analysis Of Mesospheric Airglow Image Data, F. J. Garcia, Michael J. Taylor, M. C. Kelley

All Physics Faculty Publications

A technique to analyze short-period (<1 hour) gravity wave structure in all-sky images of the airglow emissions is described. The technique involves spatial calibration, star removal, geographic projection, regridding, and flat fielding of the data prior to the determination of the horizontal wave parameters (wavelength, velocity, and period), by use of standard two-dimensional Fourier analysis techniques. The method was developed to exploit the information that is now available with wide-field solid state imaging systems. This technique permits interactive and quantitative investigations of large, complex data sets. Such studies are important for investigating gravity wave characteristics, their interaction with the airglow emissions, and their geographic and seasonal variability. We study one event of this type here and present possible evidence of a nonlinear wave–wave interaction in the upper atmosphere.

The Salinity And Hydrology Of Cranbrook, R Ferdowsian, A T. Ryder

Resource management technical reports

The study area covers the Cranbrook townsite and two catchments that affect it. The Cranbrook Town is located 85 km north-north-west of Albany and it has a population of 320 people (1190 in the Shire; ABS Census 1991).

Cranbrook is experiencing salinity problems. Saline groundwater levels are close to the soil surface and cause deterioration of buildings, roads, infrastructure, death of trees and scalding of land including the sporting ground.

The objective of this study was to define the present salinity status of the Cranbrook Town and develop management strategies to overcome or reduce the severity of salinity.

Orbifolds With Lower Ricci Curvature Bounds, Joseph E. Borzellino

Mathematics

We show that the first betti number of a compact Riemannian orbifold with Ricci curvature and diameter is bounded above by a constant , depending only on dimension, curvature and diameter. In the case when the orbifold has nonnegative Ricci curvature, we show that the is bounded above by the dimension , and that if, in addition, , then is a flat torus .

A Sign-Changing Solution For A Superlinear Dirichlet Problem, Alfonso Castro, Jorge Cossio, John M. Neuberger

All HMC Faculty Publications and Research

We show that a superlinear boundary value problem has at least three nontrivial solutions. A pair are of one sign (positive and negative, respectively), and the third solution changes sign exactly once. The critical level of the sign-changing solution is bounded below by the sum of the two lesser levels of the one-sign solutions. If nondegenerate, the one sign solutions are of Morse index 1 and the signchanging solution has Morse index 2. Our results extend and complement those of Z.Q. Wang [12].

Abalone Aquaculture In Western Australia. Discussion Paper And Draft Policy Guidelines., Cameron Westaway, Jeff Norriss

Fisheries Management Papers

The purposes of this discussion paper is to highlight relevant issues associated with abalone aquaculture development and outline a set of draft policy guidelines. The paper is being disseminated to members of the aquaculture industry, commercial and recreational fishing bodies and the broader community to allow comment.

Santa Clara Magazine, Volume 39 Number 3, Autumn 1997, Santa Clara University

Santa Clara Magazine

6 -THE ART OF AN LNTEGRATED EDUCATION How the University connects learning and living, knowing and acting. By Paul Locatelli, S.J., '60

10 - DOUBLE OR NOTHING The University's resident experts discuss the pros and cons of cloning. By Robin K Sterns, Ph.D. Illustrations by Dug Waggoner

17 - SCU: BLUEPRINT FOR THE FUTURE The face of the campus is changing. In the near future six new structures will rise at SCU. By Susan Vogel

23 - SHEDDING LIGHT ON THE HEART OF DARKNESS Two photographers illuminate a shameful period in American history. By Christiaan T. Lievestro, Ph.D.

Renewable Energy Technologies And Policies: Status And Prospects, Christopher Flavin, Seth Dunn

Buffalo Environmental Law Journal

No abstract provided.

Potential Demand For Programs On Nuisance Wildlife Among Wildlife-Related Program Offerings To Urban/Suburban Organizations (Poster Abstract), S. M. Leslie, P. F. Scanlon, O. T. Clarke

Eastern Wildlife Damage Management Conference: 8th (1997)

Program planners of 114 organizations in the Roanoke Valley area of Virginia responded to the likelihood of their scheduling programs on wildlife-related topics. Among the topics offered was “Controlling Wildlife Pests and/or Their Damage.” Responses were organized by type of organization (civic club, neighborhood organization, educational/PTA organization, environmental/hobby organization, garden/plant club) and whether they were “highly likely” (HL), “somewhat likely” (SL), “not likely” (NL), or “not sure” (NS) they would schedule such a program. Results on likelihood of scheduling were as follows: 31 civic clubs (1 HL, 4 SL, 33NL, 4 NS); 26 neighborhood organizations (5 HL, 7 SL, 5 …

Development Of A Double-Crested Cormorant Damage Management Plan For The Southeastern United States, Keith J. Andrews, Pete Poulos, Charles (Bo) Sloan, Jerrold L. Belant, Paige G. Ross, Paul Debow

Eastern Wildlife Damage Management Conference: 8th (1997)

In response to needs within the aquaculture industry to alleviate increasing depredation by double-crested cormorants (Phalacrocorax auritus), the U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, in conjunction with Federal, State, and Canadian wildlife and fisheries agencies, the aquaculture industry, and other wildlife professionals, is developing the framework for a comprehensive cormorant damage management program that uses an integrated wildlife damage management approach. This cooperative effort will produce a meaningful, mutually beneficial program that will reduce the effects of cormorants on aquaculture and sport and commercial fisheries, improve understanding of cormorant biology, and avert …

Conference Summary: What Have We Learned? Where Do We Go From Here?, James E. Miller

Eastern Wildlife Damage Management Conference: 8th (1997)

Since I am charged with providing some closing comments this morning, let me begin by having those of you who are still with us to join me in providing a round of applause to Jim Parkhurst, Phil Eggborn, and Martin Lowney, the Conference Planning Committee, and to those on the Conference Program Committee; to the sponsors, exhibitors, speakers, session moderators; and to all of you as participants who helped make this 8th Eastern Wildlife Damage Management Conference so successful. And, as most of you know who have ever planned and conducted such a conference, there are always a number of …

An Evaluation Of Farmer Applications Of Deer Damage Controls, Peter Fritzell Jr., Glenn Dudderar, R. Ben Peyton

Eastern Wildlife Damage Management Conference: 8th (1997)

Damage to agricultural crops caused by white-tailed deer (Odocoileus virginianus) continues to be a significant concern of farmers in Michigan and elsewhere in the United States. Policy changes that promise to reduce deer numbers may be long in coming, but better application of available damage control techniques may be an immediate alternative for farmers awaiting relief. Conversations with farmers, extension agents, and wildlife professionals suggest that some damage control techniques are underutilized by Michigan farmers, whereas other techniques are applied with little success despite promising field trials. We investigated producers’ practices to identify common weaknesses in how deer …

List Of Participants

Eastern Wildlife Damage Management Conference: 8th (1997)

participants