Physical Sciences and Mathematics Commons^™

Has Feminism Changed Physics?, Amy Lisa Graves

Physics & Astronomy Faculty Works

No abstract provided.

Understanding Wavelet Analysis And Filters For Engineering Applications, Chethan Bangalore Parameswariah

Doctoral Dissertations

Wavelets are signal-processing tools that have been of interest due to their characteristics and properties. Clear understanding of wavelets and their properties are a key to successful applications. Many theoretical and application-oriented papers have been written. Yet the choice of a right wavelet for a given application is an ongoing quest that has not been satisfactorily answered. This research has successfully identified certain issues, and an effort has been made to provide an understanding of wavelets by studying the wavelet filters in terms of their pole-zero and magnitude-phase characteristics. The magnitude characteristics of these filters have flat responses in both …

Cross Sections Spring 2003, Department Of Physics And Astronomy

Cross Sections

No abstract provided.

Optical Transmission Measurements Of Explosive Boiling And Liftoff Of A Layer Of Micron-Scale Water Droplets From A Krf Laser-Heated Si Substrate, Sergey I. Kudryashov, Susan D. Allen

Mechanical Engineering - Daytona Beach

Water plume velocities were measured in air by optical transmission as a function of laser fluence using a KrF laser for explosive boiling and liftoff of a layer of micron-scale waterdroplets from a laser-heated Si substrate of interest for laser particle removal. The thickness of the superheated water layer near the water/Si interface determines acceleration and removal of the waterdroplets from the Si substrate.

© 2003 American Institute of Physics

Urban Hydrologic Design: Water Balance Analysis, Conservation Techniques, And Feasibility Study Of Rainwater Harvesting At Boundary Bay Brewery, Bellingham, Washington, Kerri Cook, Alasia Heinritz

WWU Honors College Senior Projects

As population and consumption levels continue to increase against a fixed supply of renewable fresh water, creative new ways of sustaining this resource must be explored. Particularly in the Pacific Northwest, climatic variability and increasing water demands are creating a situation that is forcing water resource managers to critically examine the sustainability of current water usage. The drought-like summer conditions of 2002 forced the City of Bellingham Public Works into distributing the majority of all legally available freshwater from the Lake Whatcom reservoir, yet there are no financial-based incentives encouraging Bellingham residents to decrease their water consumption. The price of …

Relativistic Laser–Plasma Interactions, Donald Umstadter

Donald Umstadter Publications

By focusing petawatt peak power laser light to intensities up to 10²¹ Wcm⁻², highly relativistic plasmas can now be studied. The force exerted by light pulses with this extreme intensity has been used to accelerate beams of electrons and protons to energies of a million volts in distances of only microns. This acceleration gradient is a thousand times greater than in radio-frequency-based accelerators. Such novel compact laser-based radiation sources have been demonstrated to have parameters that are useful for research in medicine, physics and engineering. They might also someday be used to ignite controlled thermonuclear fusion. Ultrashort …

Identifying Patterns In Dna Change, Jason R. Gilder, Dan E. Krane, Travis E. Doom, Michael L. Raymer

Kno.e.sis Publications

Now that a draft sequence of the human genome is nearly complete, questions regarding both the information contained within our genetic blueprints as well as the manner in which that information content changes over time can be addressed in ways that had not previously been possible. By their very nature, some of the nucleotide sequences present within our genome allow detailed examination of the mode and pattern of evolution that has shaped our genetic instructions over time spans of tens of millions of years. Alu repeats are one example. Using these relatively short, ubiquitous DNA sequences we explore the problem …

Upper Spokane River Model In Idaho: Boundary Conditions And Model Setup For 2001, Scott A. Wells, Robert Leslie Annear, Chris Berger

Civil and Environmental Engineering Faculty Publications and Presentations

The Spokane River in Idaho originates in Coeur d’Alene Lake (Figure 1 and Figure 2). The section of the Spokane River from Coeur d’Alene Lake to the Washington state line is the subject of a water quality study for the US Environmental Protection Agency. The objective of this study is to create a water quality and hydrodynamic model of the Spokane River in Idaho using CE-QUAL-W2 Version 3.1 (Cole and Wells, 2002).

Since the Spokane River is water quality limited, a hydrodynamic and water quality model for the Spokane River in Washington was developed by Portland State University for the …

Avoiding Deadlock In A Multi-Processor Enviroment, Beth Davis

Honors Capstone Projects and Theses

No abstract provided.

Cause-Effect Relationships In Analytical Surveys: An Illustration Of Statistical Issues, Gary L. Gadbury, Hans T. Schreuder

Mathematics and Statistics Faculty Research & Creative Works

Establishing cause-effect is critical in the field of natural resources where one may want to know the impact of management practices, wildfires, drought, etc. on water quality and quantity, wildlife, growth and survival of desirable trees for timber production, etc. Yet, key obstacles exist when trying to establish cause-effect in such contexts. Issues involved with identifying a causal hypothesis, and conditions needed to estimate a causal effect or to establish cause-effect are considered. Ideally one conducts an experiment and follows with a survey, or vice versa. in an experiment, the population of inference may be quite limited and in surveys, …

Kentucky River Basin: Unified Long-Range Water Resources Plan. County Water Management Planning For The Kentucky River Basin, Lindell E. Ormsbee, Malissa Mcalister

KWRRI Research Reports

No abstract provided.

On-Line Spatial Processing Systems, James Carswell, Michela Bertolotto

Articles

On-line Spatial Processing (OLSP) delivers high performance spatial systems for the modelling and monitoring of dynamic environments. It provides an ideal solution for the management of networks, land and assets, and the real-time tracking of changing spatial systems. OLSP is server-centric, as opposed to the primarily desktop-centric world of GIS. It places spatial data at the heart of the organisation's IT systems and integrates it with business and attribute data. The result is more effective use of spatial data and improved decision support and spatial intelligence throughout the organisation.

Moon Lake 11,000 Year Diatom-Inferred Salinity Data, Kathleen R. Laird, Sherilyn C. Fritz, Eric C. Grimm, P. G. Mueller

Department of Earth and Atmospheric Sciences: Faculty Publications

Estimates of past lake-water salinity from fossil diatom assemblages were used to infer past climatic conditions at Moon Lake, a climatically sensitive site in the northern Great Plains. A good correspondence between diatom-inferred salinity and historical records of mean annual precipitation minus evapotranspiration (P-ET) strongly suggests that the sedimentary record from Moon Lake can be used to reconstruct past climatic conditions. Century-scale analysis of the Holocene diatom record indicates four major hydrological periods: an early Holocene transition from an open freshwater system to a closed saline system by 7300 BP, which corresponds with a transition from spruce forest to deciduous …

Searching For Planetary Transits In The Field Of Open Cluster Ngc 6819 – I, R. A. Street, Keith Horne, T. A. Lister, A. Penny, Y. Tsapras, A. Quirrenbach, N. Safizadeh, David Mitchell, J. Cooke, A. Collier Cameron

Physics

We present results from our survey for planetary transits in the field of the intermediate-age (∼2.5 Gyr), metal-rich ([Fe/H] ∼+0.07) open cluster NGC 6819. We have obtained high-precision time-series photometry for over 38 000 stars in this field and have developed an effective matched-filter algorithm to search for photometric transits. This algorithm identified 8 candidate stars showing multiple transit-like events, plus 3 stars with single eclipses. On closer inspection, while most are shown to be low-mass stellar binaries, some of these events could be the result of brown dwarf companions. The data for one of the single-transit candidates indicate a …

Wide Angle Achromatic Prism Beam Steering For Infrared Countermeasures Applications, Bradley D. Duncan, Philip J. Bos, Vassili Sergan

Electro-Optics and Photonics Faculty Publications

The design and analysis of achromatic doublet prisms for use in laser beam steering is presented. The geometric relationships describing the maximum steering angle are given, as are discussions of first- and second-order dispersion reduction. Infrared (IR) material alternatives and optimum IR material characteristics for wide-angle achromatic prism beam steering are also investigated. Sixteen materials in 120 different combinations have been examined to date. For midwave IR applications it is shown that the minimum dispersion currently achievable across the full 2 to 5 μm spectrum is 1.7816 mrad at an average maximum steering angle of 45 deg. This is accomplished …

Rapid Multiplexed Data Acquisition: Application To Three-Dimensional Magnetic Field Measurements In A Turbulent Laboratory Plasma, Michael R. Brown

Physics & Astronomy Faculty Works

Multiplexingelectronics have been constructed to reduce the cost of high-speed data acquisition at the Swarthmore SpheromakExperiment (SSX) and Redmond Plasma Physics Laboratory. An application of the system is described for a three-dimensional magnetic probe array designed to resolve magnetohydrodynamic time scale and ion inertial spatial scale structure of magnetic reconnection in a laboratory plasma at SSX. Multiplexing at 10 MHz compresses 600 pick-up coil signals in the magnetic probe array into 75 digitizer channels. An external master timing system maintains synchronization of the multiplexers and digitizers. The complete system, calibrated and tested with Helmholtz, line current, and magnetofluid fields, reads …

Einstein Oscillators In Thallium Filled Antimony Skutterudites, Raphaël P. Hermann, Rongying Jin, Werner Schweika, Fernande Grandjean, David G. Mandrus, Brian C. Sales, Gary J. Long

Chemistry Faculty Research & Creative Works

Heat capacity measurements were performed on Tl_0.8Co₄Sb₁₁Sn. An Einstein vibrating behavior for the thallium atoms was found. The inelastic neutron scattering measurements on T_0.8Co₄Sb₁₁Sn, Tl_0.5Co_3.5Fe_0.5Sb₁₂, and Tl_0.8Co₃FeSb₁₂ showed a localized vibrational mode, which confirmed this Einstein vibrational behavior. Furthermore, the 56±2 K temperature of the Einstein vibrational mode obtained from the heat capacity measurements showed excellent agreement with the 5 meV energy or 57±2 K values obtained from the neutron scattering measurements.

Intuitive Black-Scholes Option Pricing With A Simple Table, Tom Arnold, Terry D. Nixon, Richard L. Shockley Jr.

Finance Faculty Publications

The Black-Scholes option pricing model (1973) can be intimidating for the novice. By rearranging and combining some of the variables, one can reduce the number of parameters in the valuation problem from five to two: 1) the option's moneyness ratio and 2) its time-adjusted volatility. This allows the computationally complex Black-Scholes formula to be collapsed into an easy-to-use table similar to those in some popular textbooks. The tabular approach provides an excellent tool for building intuition about the comparative statics in the Black-Scholes equation. Further, the pricing table can be used to price options on dividend-paying stocks, commodities, foreign exchange …

Visualizing The Stochastic Calculus Of Option Pricing With Excel And Vba, Tom Arnold, Stephen C. Henry

Finance Faculty Publications

Stochastic calculus, part calculus and part statistics, is an integral part of option pricing that can be intimidating. By developing the statistical nature of stochastic processes and introducing Monte Carlo simulation using Microsoft Excel, this paper develops a visualization of how stochastic processes are evaluated using Ito's lemma and integral calculus. Ultimately, the Black-Scholes (1973) option pricing equation is the natural result.

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 19, Number 6, April 2003, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

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

Urban Biosphere Reserves: Integrating Conservation, Community And Sustainability, Jennifer L. Eastman

William & Mary Environmental Law and Policy Review

No abstract provided.

Efficient Computation Of Location Depth Contours By Methods Of Computational Geometry, Kim Miller, Suneeta Ramaswami, Peter Rousseeuw, J. Antoni Sellarès, Diane Souvaine, Ileana Streinu, Anja Struyf

Computer Science: Faculty Publications

The concept of location depth was introduced as a way to extend the univariate notion of ranking to a bivariate configuration of data points. It has been used successfully for robust estimation, hypothesis testing, and graphical display. The depth contours form a collection of nested polygons, and the center of the deepest contour is called the Tukey median. The only available implemented algorithms for the depth contours and the Tukey median are slow, which limits their usefulness. In this paper we describe an optimal algorithm which computes all bivariate depth contours in O(n 2) time and space, using topological sweep …

Ampnet - A Highly Available Cluster Interconnection Network, Amy Apon, Larry Bilbur

Publications

No abstract provided.

Properties Of A Mixed-Valent Iron Compound With The Kagomé Lattice, Chintamani Nagesa Ramachandra Rao, Geo L. Paul, Amitava Choudhury, Echur Varadadesikan Sampathkumaran, Arup Kumar R. Raychaudhuri, Suryanarayanasastry Ramasesha, Indranil Rudra

Chemistry Faculty Research & Creative Works

An organically templated iron sulfate of the formula [HN(CH₂)₆NH][Fe^III Fe₂ ^IIF₆(SO₄)₂] ·[H₃O] possessing the kagomé lattice has been prepared and characterized by single-crystal crystallography and other techniques. This mixed-valent iron compound shows complex magnetic properties including spin-glass behavior and magnetic hysteresis. The low-temperature specific heat data show deviation from the T² behavior found in two-dimensional frustrated systems. Simple calculations have been carried out to understand the properties of this kagomé compound.

Serologic Survey For Diseases In Free-Ranging Coyotes (Canis Latrans) From Two Ecologically Distinct Areas Of Utah, Wendy M. Arjo, Eric M. Gese, Cassity Bromley, Adam Kozlowski, Elizabeth S. Williams

United States Department of Agriculture Wildlife Services: Staff Publications

The influence of habitat and associated prey assemblages on the prevalence of canine diseases in coyotes (Canis latrans) has received scant attention. From December 1997 through December 1999, we captured 67 coyotes in two ecologically distinct areas of Utah (USA): Deseret Land and Livestock Ranch and US Army Dugway Proving Ground. These areas differ in habitat and prey base. We collected blood samples and tested for evidence of various canine diseases. Prevalence of antibodies against canine parvovirus (CPV) was 100% in the Deseret population and 93% in the Dugway population. All juveniles in both populations had been exposed. …

The John Muir Newsletter, Spring 2003, The John Muir Center For Environmental Studies

Muir Center Newsletters (1981-2015)

E JOHM MUI Volume 13, Number 2 Newsletter oYofthe Pacific. Stockton* CA Spring 2003 John Mum a t Big Basin: Some Unrecognized Chronology in the Early Preservation of California's Coastal Redwoods by Howard R. Cooley, San Jose, CA " The battle we have fought, and are still fighting . . . is part of the eternal conflict between right and wrong, and we cannot expect to see the end of it. " The National Parks and Forest Reservations, Sierra Club Bulletin, January 1896 Shasta.' It was perhaps during his stay in San Francisco that he made one of his visits …

Modeling The Decision Process Of A Joint Task Force Commander, John Anthony Sokolowski

Computational Modeling & Simulation Engineering Theses & Dissertations

The U.S. military uses modeling and simulation as a tool to help meet its warfighting needs. A key element within military simulations is the ability to accurately represent human behavior. This is especially true in a simulation's ability to emulate realistic military decisions. However, current decision models fail to provide the variability and flexibility that human decision makers exhibit. Further, most decision models are focused on tactical decisions and ignore the decision process of senior military commanders at the operational level of warfare. In an effort to develop a better decision model that would mimic the decision process of a …

Parallel Implementation Of A Face Recognition [Sic] System Based On Modular Pca Approach, Rajkiran Gottumukkal

Electrical & Computer Engineering Theses & Dissertations

This thesis describes research in automated methods for the recognition of human faces. The research is driven by the need to design a method, which would ensure high accuracy under the conditions of facial expression, illumination and pose variations. The resulting method is able to cope with uncontrolled nature of facial expression, illumination and head rotations. The main novelty of this work is the idea that some of the local facial features do not vary even when the facial expression, illumination and pose vary. This idea is applied to the existing principle component analysis lPCA) method to arrive at a …

Output Analysis Of Configurable Port Simulation, Ravikiran Jogu

Electrical & Computer Engineering Theses & Dissertations

The Configurable Port Simulation (CPortS) is a simulation of military cargo moving through a commercial seaport during a force deployment. CPortS simulates cargo at the individual entity level of detail. Simulation at the individual entity level generates huge amounts of output data making the output analysis difficult. To understand the reasons as to why bottlenecks occur in the process of cargo clearance, an analyst needs to be able to partition the data during analysis, not a priori. This makes the estimation of required graph generation impossible, which demands a very dynamic output analysis tool that can enable the analyst to …

A Framework Of Cooperating Agents Hierarchies For Local-Area Mobility Support, Ayman Adel Abdel Hamid

Computer Science Theses & Dissertations

Host mobility creates a routing problem in the Internet, where an IP address reflects the network's point of attachment. Mobile IP, relying on a mapping between a home address and a care-of address, and a home registration process, is widely accepted as a solution for the host mobility problem in wide-area mobility scenarios. However, its home registration requirement, upon each change of point of attachment, makes it unsuitable to handle local-area mobility, resulting in large handoff latencies, increased packet loss, and disrupted services. In this dissertation, we introduce a local-area mobility support framework for IPv4 based on the deployment of …