Physical Sciences and Mathematics Commons^™

Liquid Crystal Blazed Gratings Formed In A Single-Step Through Photo-Induced Localization Of Polymer Into A Prismatic Structure, Sang Hwa Kim, Liang-Chy Chien

Liang-Chy Chien

A liquid crystal blazed grating having a prismatic polymer microstructure has been developed. The polymer structure is fabricated by photo-induced localization and polymerization of a small concentration of monomer onto one substrate of an electro-optical cell by using ultraviolet light irradiation at 45degrees direction from normal incident. Using this method a periodical one-dimensional pattern with a prismatic shape of polymer can be formed on a one-dimensional pattern-forming state of a cholesteric host. The optical diffraction properties of the grating are evaluated by the application of electric field and light incident angles.

Local Community Participation In Livelihoods Improvement And Sustainability “Anaqeed Al-Khair Project Case Study, Raed Al-Tabini, I.A. Hawamdeh

Raed Al-Tabini

No abstract provided.

Towards Increasing Web Application Productivity, Jia Zhang, Jen-Yao Chung, Carl Chang

Jia Zhang

No abstract provided.

Migration To Web Services Oriented Architecture – A Case Study, Jia Zhang, Jen-Yao Chung, Carl Chang

Jia Zhang

No abstract provided.

Committee On Climate Change And Sustainable Development: 2003 Annual Report, John Dernbach

John C. Dernbach

No abstract provided.

On The Edge Set Of Graphs Of Lattice Paths, Lara Pudwell, Steven Klee, Rick Gillman

Lara K. Pudwell

No abstract provided.

Underwater Terrain Reconstruction Using Sonar Data Taken From Multiple Vantage Points, Christopher Roman

Christopher N. Roman

No abstract provided.

An Evaluation Of The Potential Of Atriplex Nummualria For Sheep Production In Arid Jordanian Rangelands, Raed Al-Tabini, A. Younger

Raed Al-Tabini

No abstract provided.

On Cross Numbers Of Minimal Zero Sequences In Certain Cyclic Groups, Lara Pudwell, Scott Chapman, Paul Baginski, Kathryn Mcdonald

Lara K. Pudwell

No abstract provided.

Reading, Writing, And Toxics: Children's Health, Academic Performance, And Environmental Justice In Los Angeles, Manuel Pastor, James Sadd, Rachel Morello-Frosch

James Sadd

A significant body of previous research on environmental justice has demonstrated a disproportionate burden of environmental hazards on low-income and minority residents. In this paper we evaluate spatially indexed data on estimated respiratory and cancer risks associated with exposures to ambient air toxics to show that children of color in the Los Angeles Unified School District suffer potentially disparate health impacts, and that disparities in environmental risks may be associated with diminished school performance -- even after controlling for socioeconomic and demographic covariates that generally explain much of the variation in student scores. Remediating environmental health risks in distressed neighborhoods …

Synthesis, Crystal Structure And Thermoelectric Properties Of Β-K2bi8se13 Solid Solutions, Theodora Kyratsi, Duck-Young Chung, Jeff Dyck, Ctirad Uher, Sangeeta Lal, Sim Loo, Tim Hogan, John Ireland, Carl Kannewurf, Evripides Hatzikraniotis, Konstantinos Paraskevopoulos, Mercouri Kanatzidis

Jeffrey Dyck

Solid solution series of the type K2Bi8-xSbxSe13, K2-xRbxBi8Se13 as well as K2Bi8Se13-xSx were prepared and the distribution of the atoms (Bi/Sb, K/Rb and Se/S) on different crystallographic sites, the band gaps and their thermoelectric properties were studied. The distribution Se/S appears to be more uniform than the distribution of the Sb and Rb atoms in the β-K2Bi8Se13 structure that shows preference in specific sites in the lattice. Band gap is mainly affected by Sb and S substitution. Seebeck coefficient measurements showed n-type character for of all Se/S members. In the Bi/Sb series an enhancement of p-type character was observed. The …

Hands-On Geometry, S. Sportsman, Shannon Driskell

Shannon O.S. Driskell

Sportsman, S. (Co-PI), & Driskell, S. (Co-PI), Improving Teacher Quality State Grants Program, Ohio Board of Regents, $90,246

Fixed Point Theorems, Karen Saxe, Karine Moe

Karen Saxe

No abstract provided.

Windimurra Vanadium Deposit, Murchison Region, W.A., D Bolton, Jude Alexander

Jude Alexander

No abstract provided.

Lactone Synthesis Via Biotransformations Of -Hydroxyamides, Thomas Goyne, Stephen Taylor, Carrie Arnold, Aaron Gerds, Nathan Ide, Keri Law, Dale Kling, Matthew Pridgeon, Lloyd Simons, James Vyvyan, Jennifer Yamaoka, Min-Ken Liao

Thomas Goyne

No abstract provided.

Thermodynamic Method For Prediction Of Surfactant Modified Oil Droplet Contact Angles, Samuel Morton, D. Keffer, R. Counce, D. Depaoli, M. Hu

Samuel A Morton

No abstract provided.

Biorthogonal Spline Type Wavelets, Tian-Xiao He

Tian-Xiao He

Let ¢ be an orthonormal scaling function with approximation degree p - 1, and let Bn be the B-spline of order n. Then, spline type scaling functions defined by fn = f * Bn (n = 1, 2, ... ) possess higher approximation order, p+n-1, and compact support. The corresponding biorthogonal wavelet functions are also constructed. This technique is extended to the case of biorthogonal scaling function system. As an application of the method supplied in this paper, one can easily construct a sequence of pairs of biorthogonal spline type scaling functions from one pair of biorthogonal scaling functions or …

Students’ Problem-Solving Strategies With Fractions, Shannon Driskell

Shannon O.S. Driskell

Driskell, S. (PI), University of Dayton Research Council Seed Grant, $4,000

Deep Tissue Imaging Approaches By Direct Capture Of Two-Photon Absorptionmacro To Nano, T. Ye, W. Wagner, Peifang Tian, G. Yurtsever, M. Fischer, W. Wagner

Peifang Tian

No abstract provided.

Natural Resources And The Public Estate, John Dernbach

John C. Dernbach

No abstract provided.

Alq3-Modified Indium Tin Oxide For Enhancing The Efficiency And Reliability Of Organic Light-Emitting Devices, Yf Liew, F.R. Zhu, Sj Chua, Jx Tang

Professor ZHU, Fu Rong

No abstract provided.

An Analog And Mathematical Modeling Resource Catalog For Undergraduate Structural Geology Courses, Phillip Resor, John Stimac, Michelle Cooke, Juliet Crider, Dazhi Jiang, Basil Tikoff, Jamie Toro

Phillip G Resor

The Modeling Structural Processes Working Group of the recent NAGT Workshop: "Teaching Structural Geology in the 21st Century" (TSG21) presents a catalog of models used in the teaching of structural geology to undergraduate students. Structural geology models are simplified constructs of complex earth system processes that have long been known to engage students and enhance their intuition of the deformation of earth materials. We recognize four classes of models: conceptual models, data representation models (including maps, stereonets, three-dimensional renderings, and statistical descriptions), analog models (including experiments with rock and non-rock materials), and mathematical models (including analytical expressions and deterministic or …

Introductory Combinatorics & Graph Theory, Joe Demaio, Virginia Watson

Joe DeMaio

Inverse Eigenproblems And Associated Approximation Problems For Matrices With Generalized Symmetry Or Skew Symmetry, William F. Trench

William F. Trench

No abstract provided.

Minimization Problems For (R,S)-Symmetric And (R,S)-Skew Symmetric Matrices, William F. Trench

William F. Trench

No abstract provided.

Modeling The Optimum Duration Of Antibiotic Prophylaxis In An Anthrax Outbreak, Ron Brookmeyer, Elizabeth Johnson, Robert Bollinger

Ron Brookmeyer

A critical consideration in effective and measured public health responses to an outbreak of inhalational anthrax is the optimum duration of antibiotic prophylaxis. We develop a competing-risks model to address the duration of antibiotic prophylaxis and the incubation period that accounts for the risks of spore germination and spore clearance. The model predicts the incubation period distribution, which is confirmed by empirical data. The optimum duration of antibiotic prophylaxis depends critically on the dose of inhaled spores. At high doses, we show that exposed persons would need to remain on antibiotic prophylaxis for at least 4 months, and considerable morbidity …

Statistical Models And Bioterrorism: Application To The U.S. Anthrax Outbreak, Ron Brookmeyer, Natalie Blades

Ron Brookmeyer

In the fall of 2001 an outbreak of inhalational anthrax occurred in the United States that was the result of bioterrorism. Letters contaminated with anthrax spores were sent through the postal system. In response to the outbreak, public health officials treated over 10,000 persons with antibiotic prophylaxis in the hopes of preventing further morbidity and mortality. No persons receiving the antibiotics subsequently developed disease. The question arises as to how many cases of disease may actually have been prevented by the public health intervention of antibiotic prophylaxis. A statistical model is developed to answer this question by relating to the …

An Open Framework Supporting Multimedia Web Services, Jia Zhang, Jen-Yao Chung

Jia Zhang

No abstract provided.

Mockup-Driven Fast Prototyping Methodology For Web Requirements Engineering, Jia Zhang, Carl Chang, Jen-Yao Chung

Jia Zhang

No abstract provided.

Mediating Electronic Meetings, Jia Zhang, Carl Chang, Jen-Yao Chung

Jia Zhang

No abstract provided.