Physical Sciences and Mathematics Commons^™

Assessing The Accuracy Of A New Diagnostic Test When A Gold Standard Does Not Exist, Todd A. Alonzo, Margaret S. Pepe

UW Biostatistics Working Paper Series

Often the accuracy of a new diagnostic test must be assessed when a perfect gold standard does not exist. Use of an imperfect test biases the accuracy estimates of the new test. This paper reviews existing approaches to this problem including discrepant resolution and latent class analysis. Deficiencies with these approaches are identified. A new approach is proposed that combines the results of several imperfect reference tests to define a better reference standard. We call this the composite reference standard (CRS). Using the CRS, accuracy can be assessed using multistage sampling designs. Maximum likelihood estimates of accuracy and expressions for …

A Kinetic Analysis Of The Conformational Flexibility Of Steroid Hormones, Steven P. Bradbury, Julian Ivanov, Ovanes Mekenyan, Gerritt Schüürmann

Steven P. Bradbury

For a set of 10 androgen steroids and estradiol (E2), the kinetic feasibility of conformation flexibility of the cyclic moieties was studied under the constraint of maintaining the B/C trans and C/D trans ring fusion of the natural and biologically active enantiomer. To this end, the conformational energy surface was quantified using the semiempirical quantum chemical AM1 model. The computational analysis included the location of Conformational transition states with associated barriers, and intrinsic reaction coordinate (IRC) calculations to characterize the trajectories of the rotations and the relationships of the transition states to neighbouring chair and twist conformations. Conformational transformations were …

24. Bahattin M. Baysal, Otto Vogl, Elif Hamurcu

Otto Vogl

No abstract provided.

5th Pacific Polymer Conference, Kyongju, Korea, Otto Vogl, Sun Chul Kim

Otto Vogl

No abstract provided.

1998 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library

Scholars and Artists Bibliographies

This bibliography was created for the annual Friends of the Michael Schwartz Library Scholars and Artists Reception, recognizing scholarly and creative achievements of Cleveland State University faculty, staff and emeriti

Abstractions For Simplifying Planning In Self-Reconfigurable Robotic Systems, Craig Mcgray, Daniela Rus

Computer Science Technical Reports

In [KVRM], we described a three-dimensional self-reconfiguring robot module called the Molecule Robot. In this paper, we provide a system of abstractions for modules in self-reconfigurable robotic systems, and show how this system can be used to simplify the motion planning of the Molecule Robot system.

Saturation In “Nonmagnetic” Stainless Steel, Christopher P. Weber, J. Fajans

Physics

Scientific equipment often uses “nonmagnetic” stainless steel, relying on the steel’s nonmagnetic behavior to leave external magnetic fields unaltered. However, stainless steel’s permeability can rise significantly when it is welded or machined, possibly perturbing an external field. Such perturbations will diminish well above the stainless steel’s saturation point. The authors measured the permeability of both welded and machined 304 stainless steel as a function of an external magnetic field, and found that both saturate at fields of approximately 0.25 T.

Water Resources Review - October 1998 Vol 11 No 2, Annis Water Resources Institute

AWRI Reviews

No abstract provided.

Cusp Energetic Ions: A Bow Shock Source, S. W. Chang, J. D. Scudder, S. A. Fuselier, J. F. Fennell, K. J. Trattner, J. S. Pickett, Harlan E. Spence, J. D. Menietti, W. K. Peterson, R. P. Lepping, R. Friedel

Physics & Astronomy

Recent interpretations of cusp energetic ions observed by the POLAR spacecraft have suggested a new energization process in the cusp [Chen et al., 1997; 1998]. Simultaneous enhancement of H⁺, He⁺², and O^>+2 fluxes indicates that they are of solar wind origin. In the present study, we examine H⁺ and He⁺² energy spectra from 20 eV to several 100 keV measured by the Hydra, Toroidal Imaging Mass-Angle Spectrograph (TIMAS), and Charge and Mass Magnetospheric Ion Composition Experiment (CAMMICE) on POLAR. The combined spectrum for each species is shown to be continuous with a …

Towards Performance-Driven System Support For Distributed Computing In Clustered Environments, John Cruz, Kihong Park

Department of Computer Science Technical Reports

No abstract provided.

Parallel Algorithms For Maximum Matching In Complements Of Interval Graphs And Related Problems, Marilyn G. Andrews, Mikhail J. Atallah, Danny Z. Chen, D. T. Leo

Department of Computer Science Technical Reports

No abstract provided.

On The Collapse Of The Q-Gram Filtration, E. Stuinen, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

On The Dynamics Of Stochastic Differential Equations (Ellis B. Stouffer Colloquium, University Of Kansas), Salah-Eldin A. Mohammed

Miscellaneous (presentations, translations, interviews, etc)

We formulate and outline a proof of the Local Stable Manifold Theorem for stochastic differential equations (SDE's) in Euclidean space (joint work with M. Scheutzow). This is a central result in dynamical systems with noise. Starting with the existence of a stochastic flow for an SDE, we introduce the notion of a hyperbolic stationary trajectory. We prove the existence of invariant random stable and unstable manifolds in the neighborhood of a hyperbolic stationary solution. For Stratonovich noise, the stable and unstable manifolds are dynamically characterized using forward and backward solutions of the anticipating SDE.

The Planet, 1998, Fall, Anita White, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

The Planet, 1998, Spring, Derek Reiber, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Qed On A Circle, James E. Hetrick, Y. Hosotani

All Faculty Articles - School of Engineering and Computer Science

QED with massless fermions on a circle is exactly solved. The nonintegrable phase [see file], which is a dynamical degree of freedom on a circle, couples through the anomaly to the zero mode of the fermion-antifermion bound states, leading to the θ vacuum.

Ua66/8/3 Geogram, Wku Geography & Geology

WKU Archives Records

Newsletter created by and about the WKU Geography & Geology highlighting activities of faculty, students and alumni.

Mountain Evolution And Environmental Changes Of Huangshan, China, P.-H. Huang, Robert F. Diffendal Jr., M. Yang, Patricia E. Helland

Department of Earth and Atmospheric Sciences: Faculty Publications

Huangshan (Yellow Mountain) is located in southern part of the lower reaches of the Yangtze River. The highest Lotus Flower peak is 1,864 m above sea level. Formative ages of the Huangshan and its granite, process of mountain geomorphic evolution from the Eocene to Quaternary, environmental changes of Quaternary, formative origin of beautiful peaks and fascinating rocks were studied and questionable "Pleistocene glaciation" was also discussed in this paper.

Rank One And Loosely Bernoulli Actions In Zᵈ, Aimee S.A. Johnson, A. A. Şahin

Mathematics & Statistics Faculty Works

We define rank one for Zᵈ actions and show that those rank one actions with a certain tower shape are loosely Bernoulli for d greater than or equal to 1. We also construct a zero entropy Z² loosely Bernoulli action with a zero entropy, ergodic, non-loosely Bernoulli one-dimensional subaction.

Evidence Of Initial-State Two-Center Effects For (E, 2e) Reactions, Sindu P. Jones, Don H. Madison

Physics Faculty Research & Creative Works

Coincidence, or (e, 2e), measurements of electron-impact ionization of atoms have established that the largest values of triply differential cross sections are obtained in collisions involving small momentum transfer to the target. Absolute measurements for these reactions are now available for hydrogen at 54.4-eV impact energy, and relative data have recently been reported at 27.2 eV. Previous theoretical works have concentrated on employing asymptotically correct two-center wave functions for the final state, leaving the initial state described by the Born approximation. Here we report results for which asymptotically correct two-center wave functions are used for both the initial and final …

Reactions Of Chlorine Atoms With Aromatic Compounds, Barbara O'Leary

Masters

This thesis presents the results of kinetic studies on the reactions of chlorine atoms with a series of aromatic compounds. (please see full text for complete abstract)

Cross Sections Fall 1998, Department Of Physics And Astronomy

Cross Sections

No abstract provided.

Earth News, Fall 1998, Department Of Earth Science, University Of Northern Iowa.

Earth News

Inside this issue:

--- Faculty Achievements and Activities
--- 1998 Earth Science Graduates
--- Student Research Presentations
--- Sigma Gamma Epsilon - Gamma Sigma Chapter
--- Earth Science Majors
--- Observatory: Room with a Stellar View
--- Gifts to the Department of Earth Science
--- 1998 Scholarship and Award Recipients
--- Earth Science Seminar Series
--- UNI Students Get Up Close and Personal with Nature
--- Earth Science Alumni Notes

The Probe, Issue 193 – October 1998

The Probe: Newsletter of the National Animal Damage Control Association

Recollections, 1966-1996 -- James E. Forbes, Past President, NADCA
Giles Resigns as NADCA President
Executive Committee to Appoint President
Call for Papers: 14th Great Plains Wildlife Damage Control Conference; Theme: "Solving Conflicts between People and Exotic Wildlife"
Book Reviews: 'The Humane Approach to Living with Wildlife", Edited by John Hadidian, Guy Hodge, and John W. Grandy, Humane Society of the United States. Fulcrum Press, 1997. 255 pags with indices. $16.95 Softcover.
Review by Stephen Vantassel, NWCO Correspondent
Review by Gregory A. Giusti, Forest & Wildlands Advisor, Cooperative Extension, University of California

Automated Highway Systems, Bruce M. Mcmillin, Kristen L. Sanford

Computer Science Faculty Research & Creative Works

Intelligent transportation systems (ATS) have received much attention in the transportation community and by the government in the past decade. The technology is an extension of intelligent vehicle highway systems to include transportation modes beyond highways. Major elements of ITS include: advanced traffic management systems; advanced traveller information systems; automated highway systems; the Intelligent Vehicle Initiative; and advanced commercial vehicle systems. ITS initiatives are proposed for both urban and rural areas to increase transportation system capacity by more fully utilizing the existing transportation system and improve transportation system safety. The feasibility of realizing a fully automated highway system is discussed.

A Note On The Green Dyadic Calculation Of The Decay Rates For Admolecules At Multiple Planar Interfaces, P.T. Leung, R. L. Hartman, Scott M. Cohen

Physics Faculty Publications and Presentations

The Green dyadic formulation for calculating classical decay rates of admolecules at multiple planar interfaces first published by Chance, Prock and Silbey is reexamined. It is pointed out that, for the case of fluorescing molecules sandwiched between a system of super- and substrate interfaces, the original formalism requires significant modifications in order to lead to results consistent with those obtained from the Sommerfeld radiation theory.

Antelope County Test-Hole Logs: Nebraska Water Survey Test-Hole Report No. 2, Sue Olafsen Lackey, Frank A. Smith, Robert F. Diffendal Jr.

Robert F. Diffendal, Jr., Publications

In 1930, the Conservation and Survey Division of the University of Nebraska and the United States 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 map in this report shows the location of all test holes drilled in the county since 1930.

Present techniques of …

Peculiar Velocity Dipoles Of Field Galaxies, Riccardo Giovanelli, Martha P. Haynes, Wolfram Freudling, Luiz N. Da Costa, John J. Salzer, Gary Wegner

Dartmouth Scholarship

The Tully-Fisher (TF) relation is applied to obtain peculiar velocities of field spiral galaxies and to calculate dipoles of the peculiar velocity field to cz8000 km s^-1. The field galaxy sample is spatially coextensive with and completely independent of a cluster sample, for which dipole characteristics are given in a separate paper. Dipoles of the peculiar velocity field are obtained separately by applying (1) an inverse version of the TF relation and selecting galaxies by redshift windowing and (2) a direct TF relation, with velocities corrected for the inhomogeneous Malmquist bias and windowing galaxies by TF distance. …

Influence Of 5'-(Tg)1-3- And 3'-(Ac)1-3-Overhangs On The Thermodynamic And Na+ Binding Properties Of A Series Of Oligonucleotides, Enrique Dilone

Seton Hall University Dissertations and Theses (ETDs)

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Interagency Lake Mead And Las Vegas Wash Monitoring Program: Standard Operating Procedures Manual, Bureau Of Reclamation, City Of Henderson Water Reclamation Facility, City Of Las Vegas Water Pollution Control Facility, Clark County Sanitation District, Nevada, Southern Nevada Water Authority

Publications (WR)

A number of agencies sample Lake Mead and the Las Vegas Wash on a routine basis at several locations. In order to share and properly interpret the data, the Bureau of Reclamation, Southern Nevada Water Authority and the three Wastewater Treatment Facilities (City of Las Vegas, Clark County Sanitation District and City of Henderson) formed a committee to examine sampling and analytical protocols and to share information with the goal of maximizing the data quality. The group first met in April 1997.

It was agreed that an effort should be made to discuss and compare specific sampling and analytical techniques …