Physical Sciences and Mathematics Commons^™

Effect Of Joystick Versus Control Yoke Use On Personal Computer (Pc) Flight Training: A Comparative Analysis, Gregory Alan Fontaine

Master's Theses - Daytona Beach

The purpose of this study was to provide a comparative performance analysis of a generic control yoke device and a generic joystick device. The comparison provided data needed for further evaluation of personal computer (PC) aircrew training device (ATD) potential. Both devices were used in support of the same PC flight simulation software program, and were evaluated using the experimental research method. Objective and subjective data were obtained during controlled testing, and subsequently analyzed using basic summation and t-test methods. The results tested the research hypothesis that there is no significant difference in personal computer ATD operator performance using a …

Rock Magnetic Criteria For The Detection Of Biogenic Magnetite, Bruce M. Moskowitz, Richard B. Frankel, Dennis A. Bazylinski

Physics

We report results on the magnetic properties of magnetites produced by magnetotactic and dissimilatory iron-reducing bacteria. Magnetotactic bacterial (MTB) strains MS1, MV1 and MV2 and dissimilatory iron-reducing bacterium strain GS-15, grown in pure cultures, were used in this study. Our results suggest that a combination of room temperature coercivity analysis and low temperature remanence measurements provides a characteristic magnetic signature for intact chains of single domain (SD) particles of magnetite from MTBs. The most useful magnetic property measurements include: (1) acquisition and demagnetization of isothermal remanent magnetization (IRM) using static, pulse and alternating fields; (2) acquisition of anhysteretic remanent magnetization …

Rotation Periods Of Open Cluster Stars, Ii, Charles F. Prosser, Matthew D. Shetrone, Ettore Marilli, Santo Catalano, Scott D. Williams, Dana E. Backman, Bentley D. Laaksonen, Vikram Adige, Laurence A. Marschall, John R. Stauffer

Physics and Astronomy Faculty Publications

We present the results from a photometric monitoring program of 21 stars observed during 1992 in the Pleiades and Alpha Persei open clusters. Period determinations for 16 stars are given, 13 of which are the first periods reported for these stars. Brightness variations for an additional five cluster stars are also given. One K dwarf member of the a Per cluster is observed to have a period of rotation of only 4.39 hr, perhaps the shortest period currently known among BY Draconis variables. The individual photometric measurements have been deposited with the NSSDC. Combining current X-ray flux determinations with known …

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 9, Number 10, December 1993, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

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

Directory Of Water Resource Experts At Arkansas Universities And Colleges, Kenneth F. Steele

Technical Reports

The objective of this publication is to identify those faculty and staff scientists in the universities and colleges of Arkansas who are actively conducting research on water resource issues and problems. Undoubtedly, we have omitted several such researchers, but hopefully, a second edition of this publication will be more complete.

Geology Newsletter- 1993, Department Of Geology

Geological and Environmental Sciences News

Vol.1, No. 18

• Faculty News
• Awards and Scholarships
• Service Staff News
• Hydrogeologic Atlas Available
• Alumni/ Friends/ Former Faculty Notes
• Geology Development and Scholarship Donations

A Characterization Of Extractable, Hydroxylated Fatty Acid Bearing Components In Legionella Pneumophila, Jonathan R. Lane

Electronic Theses and Dissertations

Extraction of the lipids of Legionella pneumophila yields phases unlike those produced from other Gram-negative bacteria. A viscous interface forms between the aqueous (wash) and organic phases. More than half of the hydroxylated fatty acids were found distributed between the aqueous phase and the interfacial material, fractions in which such constituents have not been reported in other Gram-negative species. It was further observed that after the material from the aqueous/interfacial phase was dissolved in methanol or chloroform/methanol (2:1 (V/V)), the addition of acetone would create a white, flocculent precipitate. Analyses showed that the supernatant contained fatty acids that were nonhydroxylated …

Two-Temperature Discrete Model For Nonlocal Heat Conduction, Sergey Sobolev

Sergey Sobolev

The two-temperature discrete model for heat conduction in heterogeneous media is proposed. It is shown that the discrete model contains as limiting cases both hyperbolic and parabolic heat conduction equations for propagative and diffusive regimes, respectively. To obtain these limiting cases two different laws of continuum limit have been introduced. The evolution of the two-temperature system comprises three stages with distinct time scales : fast relaxation of each subsystem to local equilibrium, energy exchange between the subsystems and classical hydrodynamics.

Who Enrolled In A State Program For The Uninsured: Was There Adverse Selection?, Paula Diehr

Paula Diehr

Managed care plans may hesitate to participate in programs for uninsured persons because they fear adverse selection, whereby only the sickest people or highest users would choose to join the program. We studied this issue in Washington State's Basic Health Plan, a demonstration program that provides subsidized health insurance for families earning less than 200% of the poverty level. We interviewed people in three counties who enrolled in the program, and compared them to people in the same counties who were eligible but did not enroll. There were substantial differences between enrollees and eligibles in education, age, income, employment, race, …

Polymer Science At The Kyoto Institute Of Technology, Kyoto, Japan, Otto Vogl, Shinzo Kohjiya, Takeo Araki

Otto Vogl

No abstract provided.

66. In Memoriam Herman F. Mark, Otto Vogl, Marcel Dekker

Otto Vogl

No abstract provided.

Advances In Degradable Polymers, Otto Vogl, Andrea Eckert

Otto Vogl

No abstract provided.

The Geology Of The Tuff Of Bridge Spring: Southern Nevada And Northwestern Arizona, Shirley Ann Morikawa

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Tuff of Bridge Spring (TBS) is a regionally-widespread, andesite to rhyolite (59.50 to 74.91 wt. %) ash-flow tuff of mid-Miocene age (ca. 15.2 Ma) that is exposed in the northern Colorado River extensional corridor of southern Nevada and northwestern Arizona. Determination of the areal distribution, geochronology, lithology, geochemistry, and internal stratigraphy of the TBS is important for its establishment as a reliable stratigraphic reference horizon for tectonic reconstructions of the extensional corridor during the middle Miocene. Based on reoccurring patterns of major and trace element variation, the TBS is divided into constant Cr/variable SiO₂ and variable Cr/variable SiO …

Parallel H-V Drawings Of Binary Trees, Panagiotis T. Metaxas, Grammati E. Pantziou, Antonis Symvonis

Computer Science Technical Reports

In this paper we present a method to obtain optimal h-v and inclusion drawings in parallel. Based on parallel tree contraction, our method computes optimal (with respect to a class of cost functions of the enclosing rectangle) drawings in $O(\log^2 n)$ parallel time by using a polynomial number of EREW processors. The number of processors reduces substantially when we study minimum area drawings. The method can be extended to compute optimal inclusion layouts in the case where each leaf $l$ of the tree is represented by rectangle $l_x \times l_y$ (the dimensions of which are part of the input). For …

Chromospherically Active Stars. Xi. Giants With Compact Hot Companions And The Barium Star Scenario, Francis C. Fekel, Gregory W. Henry, Michael R. Busby, Joseph J. Eitter

Information Systems and Engineering Management Research Publications

We have determined spectroscopic orbits for three chromsopherically active giants that have hot compact companions. They are HD 160538 (KO III + wd, P = 904 days), HD 165141 (G8 III + wd, P approximately 5200 days), and HD 185510 (KO III + sdB, P = 20.6619 days). By fitting an IUE spectrum with theoretical models, we find the white dwarf companion of HD 165141 has a temperature of about 35,000 K. Spectral types and rotational velocities have been determined for the three giants and distances have been estimated. These three systems and 39 Ceti are compared with the barium …

Optical Spectroscopy Of The Dusty K5 V Star Hd 98800, Francis C. Fekel, Bernard W. Bopp

Information Systems and Engineering Management Research Publications

High-resolution CCD spectra of the red region of the dusty K5 V star HD 98800, which may contain a protoplanetary disk, have been obtained at Kitt Peak National Observatory. The spectra verify the dwarf spectral type and show rotationally broadened photospheric lines, Hα emission, and a very strong Li _Ι λ6707 absorption line, all of which confirm the star as a very young object. The overall spectrum of HD 98800 closely resembles that of the young, chromospherically active, single BY Dra star HD 82558 (=LQ Hya). The measured Li _Ι equivalent width of 0.39 Å implies an abundance log N …

Extremely Active Long-Period Rs Cvn Binary Hd 12545, Bernard W. Bopp, Francis C. Fekel, Jason P. Aufdenberg, Robert C. Dempsey, Virgiljus Dadonas

Information Systems and Engineering Management Research Publications

The active-chromosphere giant HD 12545 is noteworthy for its remarkable 1990 photmetric amplitude of 0.6 mag in V, which implies that nearly half the visible hemisphere of the star was covered by cool spots. We report the results of a spectroscopic study of HD 12545, showing it to be an active-chromosphere binary with an orbital period of 23.97 days. We establish the spectral type as KO III, and measure v sin i = 17 +/- 2 km/s. The various indicators of activity in the optical and ultraviolet suggest that HD 12545 is one of the most active RS CVn systems …

Probing Tcp Implementations, Douglas E. Comer, John C. Lin

Department of Computer Science Technical Reports

No abstract provided.

An Optimal O(Log Log N) Time Parallel Algorithm For Detecting All Squares In A String, Albert Apostolico, Dany Breslauer

Department of Computer Science Technical Reports

No abstract provided.

A Generalized Schwarz Splitting Method Based On Hermite Collocation For Elliptic Boundary Value Problems, Yu-Ling Lai, Apostolos Hadjidimos, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.

Parallel Dynamic Mesh Generation And Domain Decomposition, Poting Wu, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.

Combinatorial Optimization Problems For Which Almost Every Algorithm Is Asymptotically Optimal, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

A Probabilistic Analysis Of A String Editing Problem And Its Variations, Guy Louchard, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

A Scheduling Policy With Maximal Stability Region For Rings Networks With Spatial Reuse, Leonidas Georgiadis, Wojciech Szpankowski, Leondros Tassiulas

Department of Computer Science Technical Reports

No abstract provided.

Extending Multidatabase Transaction Management Techniques To Software Development Environments, Aidong Zhang, Omran Bukhres

Department of Computer Science Technical Reports

No abstract provided.

C3: A Parallel Model For Coarse-Grained Machines, Susanne E. Hambrusch, Ashfaq A. Khokhar

Department of Computer Science Technical Reports

No abstract provided.

A View-Based Approach To Relaxing Global Serializability In Multidatabase Systems, Aidong Zhang, Evaggelia Pitoura, Bharat K. Bhargava

Department of Computer Science Technical Reports

No abstract provided.

Constructing Distributed Schedulers Using The Messiahs Interface Language, Steve J. Chapin, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.

Data Structures And Algorithms For The String Statistics Problem, Alberto Apostolico, Franco P. Preparata

Department of Computer Science Technical Reports

No abstract provided.

The Use Of Neural Networks To Support "Intelligent" Scientific Computing, Anupam Joshi, Csanjiva Weerawarana, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.