Digital Commons Network^™

Average Steady Nonuniform Flow In Stratified Formations, Peter Indelman, Vitaly A. Zlotnik

Department of Earth and Atmospheric Sciences: Faculty Publications

A mathematical model of average nonuniform flow in heterogeneous stratified media is developed. The averaged Darcy's law is obtained by deriving the analytical expression of the effective conductivity tensor for media with small heterogeneities. The fundamental solution of the average flow equation (mean Green function) corresponding to the flow toward a single point source of deterministic discharge is derived. The mean head distribution is calculated for a fully penetrating well, for a finite length well in an infinite domain, and for a dipole well. The concept of equivalent conductivity is defined for use in identifying the formation conductivity properties. The …

Whole Earth Telescope Observations Of The Helium Interacting Binary Pg 1346+082 (Cr Bootis), Judith L. Provençal, Matt A. Wood

Aerospace, Physics, and Space Science Faculty Publications

We present our analysis of 240 hr of white-light, high-speed photometry of the dwarf nova-like helium variable PG 1346+082 (CR Boo). We identify two frequencies in the low-state power spectrum, at 679.670 ± 0.004 μHz and 669.887 ± 0.008 μHz. The 679.670 μHz variation is coherent over at least a 2 week time span, the first demonstration of a phase-coherent photometric variation in any dwarf nova-like interacting binary white dwarf system. The high-state power spectrum contains a complex fundamental with a frequency similar, but not identical, to the low-state spectrum, and a series of harmonics not detected in low state. …

Montana Kaimin, May 1, 1997, Associated Students Of The University Of Montana

Montana Kaimin, 1898-present

Student newspaper of the University of Montana, Missoula.

Identification Of Belowground Woody Structures Using Molecular Biomarkers, Benny R. Bobowski

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Within the last two decades substantial progress has been made in understanding seed bank dynamics and the contribution of the soil seed bank to a post-disturbance plant community. There has been relatively little progress, however, in understanding perennial bud bank dynamics and the contribution of the soil bud bank to secondary succession. This lack of information is due primarily to the inability to reliably identify roots, rhizomes, and lignotubers that lie dormant beneath the soil surface. This scientific investigation, therefore, addressed the issue of identification of belowground woody structures.

The first objective was to develop a methodology that utilizes molecular …

Source-Aware Multidatabase Query Processing, Ee Peng Lim, Yinyan Cao, Roger Hsiang-Li Chiang

Research Collection School Of Computing and Information Systems

We introduce a multidatabase model to represent the information that derives from different local databases. This model, known as Tuple-Source (TS) relational model, accommodates tuples from different local databases by attaching them with their source information in the global relations which are also known as TS-relations. In other words, a source attribute is implicit in every TS-relation. To manipulate the global relations, we have developed the TSSQL query language and implemented a distributed query processor to process such queries. In this paper, we report our distributed query processing architecture and algorithms. Our architecture consists of a query mediator and a …

Xenon Isotope Record Of Nucleosynthesis And The Early Solar System, Jauh-Tzuoh Lee, Bin Li, Oliver Manuel

Chemistry Faculty Research & Creative Works

No abstract provided.

Uptake And Metabolism Of Atrazine By Poplar Trees, Joel Gerard Burken, Jerald L. Schnoor

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Hybrid Poplar Trees Can Uptake, Hydrolyze, and Dealkylate Atrazine to Less Toxic Metabolites. in Whole Plant Studies, the Parent Compound Atrazine and 14C Ring-Labeled Metabolites Were Extracted from Poplar Tissues and Analyzed Via High-Pressure Liquid Chromatography (HPLC) with UV and Radiochromatographic Detectors in Series. the Concurrent Separation and Identification of These Metabolites Has Not Been Previously Reported in Higher Plants for Phytoremediation Applications. Unidentified Metabolites Were Also Detected. Metabolism of Atrazine Occurred in Poplar Roots, Stems, and Leaves and Became More Complete with Increased Residence Time in Tissues. in Poplar Cuttings Exposed to Atrazine for 50 Days, the Parent Compound …

A Measurement Of Rb Using Mutually Exclusive Tags, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

A measurement of Rb using ve mutually exclusive hemisphere tags has been performed by ALEPH using the full LEP1 statistics. Three tags are designed to select the decay of the Z0 to b quarks, while the remaining two select Z0 decays to c and light quarks, and are used to measure the tagging eciencies. The result, Rb = 0:2159 0:0009(stat) 0:0011(syst), is in agreement with the electroweak theory prediction of 0:21580:0003.

A Robust Unit Commitment Algorithm For Hydro-Thermal Optimization, Chao-An Li, Chung-Li Tseng, E. Hsu, R. B. Johnson, A. J. Svoboda

Engineering Management and Systems Engineering Faculty Research & Creative Works

This paper presents a unit commitment algorithm which combines the Lagrangian relaxation (LR), sequential unit commitment (SUC), and optimal unit decommitment (UD) methods to solve a general hydro-thermal optimization (HTO) problem. The authors argue that this approach retains the advantages of the LR method while addressing the method''s observed weaknesses to improve overall algorithm performance and quality of solution. The proposed approach has been implemented in a version of PG&E''s HTO program, and test results are presented.

Performing Bmmc Permutations Efficiently On Distributed-Memory Multiprocessors With Mpi, Thomas H. Cormen

Computer Science Technical Reports

This paper presents an architecture-independent method for performing BMMC permutations on multiprocessors with distributed memory. All interprocessor communication uses the MPI function MPI_Sendrecv_replace(). The number of elements and number of processors must be powers of 2, with at least one element per processor, and there is no inherent upper bound on the ratio of elements per processor. Our method transmits only data without transmitting any source or target indices, which conserves network bandwidth. When data is transmitted, the source and target processors implicitly agree on each other's identity and the indices of the elements being transmitted. A C-callable implementation of …

Kenyon Collegian - May 1, 1997

The Kenyon Collegian

No abstract provided.

Utb/Tsc This Week 1997-05, University Of Texas At Brownsville And Texas Southmost College. Office Of News And Information

UTB/TSC Archives - This Week Newsletter

No abstract provided.

In Situ Observations Of Air Traffic Emission Signatures In The North Atlantic Flight Corridor, Hans Schlager, Paul Konopka, P. Schulte, U. Schumann, H. Ziereis, F. Arnold, M. Klemm, Donald E. Hagen, Philip D. Whitefield, J. Ovarlez

Physics Faculty Research & Creative Works

Focussed aircraft measurements have been carried out over the eastern North Atlantic to search for signals of air traffic emissions in the flight corridor region. Observations include NO, NO₂, HNO₃, SO₂, O₃, H₂O, total condensation nuclei (CN), and meteorological parameters. A flight pattern with constant-altitude north-south legs across the major North Atlantic air traffic tracks was flown. Signatures of air traffic emissions were clearly detected for NO_x, SO₂, and CN with peak concentrations of 2 ppbv, 0.25 ppbv, and 500 cm^-3, respectively, exceeding background …

Chaotic Behavior And Damage Spreading In The Glauber Ising Model: A Master Equation Approach, Thomas Vojta

Physics Faculty Research & Creative Works

We investigate the sensitivity of the time evolution of a kinetic Ising model with Glauber dynamics against the initial conditions. To do so we apply the "damage spreading" method, i.e., we study the simultaneous evolution of two identical systems subjected to the same thermal noise. We derive a master equation for the joint probability distribution of the two systems. We then solve this master equation within an effective-field approximation which goes beyond the usual mean-field approximation by retaining the fluctuations though in a quite simplistic manner. The resulting effective-field theory is applied to different physical situations. It is used to …

Mustang Daily, April 30, 1997

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

1996 - 1997 Bulletin, Loma Linda University

School of Allied Health Professions Bulletins

Loma Linda University

School of Allied Health Professions

Bulletin 1996 - 1997

Volume 86, Number 03, April 30, 1997

Senate Meeting, April 30, 1997, Academic Senate

Academic Senate Minutes

No abstract provided.

The Winonan, Winona State University

The Winonan - 1990s

No abstract provided.

April 30, 1997 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Montana Kaimin, April 30, 1997, Associated Students Of The University Of Montana

Montana Kaimin, 1898-present

Student newspaper of the University of Montana, Missoula.

Curriculum Minutes 04/30/1997, Curriculum Committee

Curriculum Committee Minutes

No abstract provided.

The Bg News April 30, 1997, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. April 30, 1997. Volume 79-Issue 144.

Paper Session I-A - A Historical Perspective Of Robotics Development In The Space Station Program, Trung T. Pham, Kumar Krishen

Space Congress® Proceedings

The research field in robotics has grown tremendously in the 80ís because of the technology push from automobile industry and from the space station program. While the automobile industry pushed for implementation of robots to perform repetitive tasks in the assembly line, the space station program pushed for development of either large-scale and light weight tele-operative robots, or intelligent robots for extravehicular activities and exploration of distant planets. Recently, more knowledge of assembly in space became available that it seemed inevitable for a need of intelligent robots in the assembly sequence as well as in operation of the space station. …

Quarterly Meeting, Wku Board Of Regents

Board of Regents Documents

Quarterly Meeting to discuss disposition of meeting minutes; James Layne gift; presidential search; Finance Committee report; WKU-Glasgow campus capital projects; personnel recommendations; distinguished professorships; president's report; resolution of appreciation for Thomas Meredith and KRS 61.810(1)(f); and appointment of Barbara Burch as interim president.

The Prevalence Of Adoption Among Children Diagnosed With Learning Disabilities And Attention Deficit Hyperactivity Disorder, Karma Jo Roach

Theses & Honors Papers

This study investigated the prevalence of adoption among children diagnosed with Learning Disabilities (LD) and Attention Deficit Hyperactivity Disorder (ADHD). Parents who were members of the Learning Disabilities Association (LDA) of a mid­ Atlantic state completed a two-part questionnaire with information about their school aged live-at-home children. A Chi-Square one sample test was used to compute a chi­ square statistic based on the observed frequency in the study and the expected frequency of adoption in the general population. The Chi-Square value was 75.773 (df=l) with a significance level of .0001. This shows a significantly greater than expected prevalence of adoption …

Catalyst, New College Of Florida

Student Publications

Ten page issue of the student produced newspaper.

Ua25/2 Retirement Banquet, Wku Human Resources

WKU Administration Documents

Program for WKU retirement banquet with list of retirees.

A Study To Determine The Effectiveness Of Computer Assisted Instruction In The Basic Mathematics High School Curriculum, Karen S. Osborne

Theses and Dissertations

The purpose of this study was to investigate the effectiveness of computer assisted instruction in the basic mathematics high school curriculum.

A 31 day study took place using a population of 25 9th grade basic mathematics students from Washington Township High School. These 25 students were split into two samples. The two samples tested were a control group consisting of 12 students who received the traditional lecture-oriented instruction, with assign-study-recite a common procedure and innovation and experimentation minimal. The experimental group consisted of 13 students who received the traditional lecture oriented instruction along with CAI. Each sample was given a …

Mustang Daily, April 28, 1997

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

Effects Of Computer Assisted Instruction And Pclogo Programs On Math Performance Of Seventh And Eighth Grade Students With Learning Disabilities, Katherine R. Sweeny

Theses & Honors Papers

The purpose of the study was to investigate the effects of computer assisted instruction and Logo programming on the math performance of seventh and eighth grade students with learning disabilities. The sample included thirty (N=30) subjects with learning disabilities. The computer programs used were Deluxe Math Munchers and LOGO for Windows. A three group pretest-posttest experimental design was used to determine if a relationship existed between the three different methods of instruction and achievement, and whether or not a significant difference existed in performance based on grade levels. The 30 subjects were randomly assigned to one of three groups, two …