Digital Commons Network^™

Combined Effects Of Screening And Band Gap Renormalization On The Energy Of Optical Transitions In Zno And Gan, D. C. Reynolds, David C. Look, B. Jogai

Physics Faculty Publications

The energy positions of the optical transitions in both GaN and ZnO were investigated when the samples were excited simultaneously with a HeCd laser and an Ar⁺ ion laser. The increased number of free electrons excited by the Ar⁺ ion laser will effectively screen both the free exciton and bound exciton transitions, resulting in a blueshift. The increased number of free electrons also produces many-body effects, which lead to a reduction of the band gap energy and thus a redshift. The resultant of screening and renormalization results in a redshift of the optical transitions in ZnO but a …

Curriculum And Assessment : A Question Of Politics?, Christine R. Brew, Gilah C. Leder

Australian Journal of Teacher Education

The Victorian Certificate of Education (VCE) has been subject to ongoing modifications since its full introduction in 1992. These changes were largely driven by vocal opponents of this educational reform. In this paper we give voice to teachers charged with implementing the curriculum and assessment directives of the VCE. Specifically, we draw on the experiences of close to 500 senior mathematics teachers – through interview and survey data - to consider the impact on them of the evolution of the VCE.

November 1, 2000 Faculty Senate Minutes, University Of South Carolina

Faculty Senate

No abstract provided.

Financial Report 2000, University Of Montana--Missoula

University of Montana Annual Financial Reports, 1918-2012

University of Montana annual financial report for fiscal year ending June 30, 2000.

Does Democracy Engender Equality?, John E. Roemer

Cowles Foundation Discussion Papers

Many suppose that democracy is an ethos which includes, inter alia, a degree of economic equality among citizens. In contrast, we conceive of democracy as ruthless political competition between groups of citizens, organized into parties. We inquire whether such competition, which we assume to be concerned with distributive matters, will engender economic equality in the long run. The society consists of an infinite sequence of generations, each comprised of adults and their children. Adults care about household consumption, and the future wages of their children, which are determined by educational policy. A given generation is characterized by the distribution of …

Poem No. 84, November 2000, Huntsville Literary Association (Huntsvile, Ala.)

POEM

The Huntsville Literary Association was founded in 1967 to provide a community for writers, readers, and artists through workshops, readings, and educational programs. One of their key contributions is the literary magazine titled POEM which showcases original writings from both established and emerging writers. This issue features poems from various writers.

Biogeochemistry And Contaminant Geochemistry Of Marine And Estuarine Sediments, New Haven, Connecticut (Usa), Michael A. Kruge, Gaboury Benoit

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

The urbanized shore areas of Long Island Sound in the vicinity of New Haven, Connecticut (USA) have a long history of exposure to point and non-point sources of pollution, New Haven having been one of the birthplaces of the industrial revolution. As an unintended consequence of such activities, the region's sedimentary systems have incorporated a complex mixture of organic and inorganic contaminants. With its long and varied pollution history and the multiplicity of sedimentary environments (fluvial, estuarine, intertidal, marsh, etc.) present in a compact geographical area, the region is ideal natural laboratory for field testing new contamination assessment techniques. The …

A Survey Of Context-Aware Mobile Computing Research, Guanling Chen, David Kotz

Computer Science Technical Reports

Context-aware computing is a mobile computing paradigm in which applications can discover and take advantage of contextual information (such as user location, time of day, nearby people and devices, and user activity). Since it was proposed about a decade ago, many researchers have studied this topic and built several context-aware applications to demonstrate the usefulness of this new technology. Context-aware applications (or the system infrastructure to support them), however, have never been widely available to everyday users. In this survey of research on context-aware systems and applications, we looked in depth at the types of context used and models of …

Sfra Review, November/December 2000, Science Fiction Research Association

SFRA Newsletter (Science Fiction Research Association)

The November/December 2000 issue of the SFRA Review.

Horse Creek Fen, Birdwood Creek And Kelly Ranch Inventory, Robert F. Steinauer

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

Horse Creek Fen preserve is a complex of wetland communities (Sandhills fen, Sandhills freshwater marsh, and northern sedge wet meadow) associated with Horse Creek, a ditched stream that drains the Allen Valley fen. Fen vegetation on the preserve is limited to approximately 20 acres on the western boundary of the preserve where it abuts the eastern end of the Allen Valley fen (Steinauer et al. 1996). The fen vegetation is surrounded primarily by Sandhills freshwater marsh, which in turn is surrounded by northern sedge wet meadow. Additional Sandhills freshwater marsh occurs near the eastern boundary of the preserve. The eastern …

November 2000, Syracuse Department Of Economics

Economics - All Scholarship

No abstract provided.

Toward Automated Abstraction For Protocols On Branching Networks, Michael D. Jones, Ganesh Gopalakrishnan

Faculty Publications

We have used various manual abstraction techniques to formally verify a transaction ordering property for an IO protocol over bus/bridge networks. In the context of network protocol verification, an abstraction is needed to reduce the unbounded number of network configurations to a small number of representative networks that can be checked using algorithmic methods. The manually derived abstraction was both brittle and difficult to validate. In this report, we discuss the need for abstraction techniques in the formal verification of protocols over networks and present our recent efforts to create an automatic abstraction technique for network protocols using predicate abstraction …

System Level Microwave Design: Radar-Based Laboratory Projects, Michael A. Jensen, David V. Arnold, Donald E. Crockett

Faculty Publications

Two laboratory projects-a Doppler radar and a synthetic aperture radar (SAR)-designed to augment traditional electromagnetics education are proposed. The projects introduce students to component and system level design and expose them to modern computer-aided design (CAD) tools, microstrip and surface mount fabrication technologies, and industry standard test equipment and procedures. Additionally, because the projects result in a working radar system, students gain new enthusiasm for the electromagnetics discipline and directly see its relevance in the engineering field. Implementation of these laboratories within the curriculum have proven to be highly motivational and educational and have even contributed to increased enrolments in …

Transport Anomalies And Marginal Fermi-Liquid Effects At A Quantum Critical Point, Dietrich Belitz, Theodore R. Kirkpatrick, Rajesh S. Narayanan, Thomas Vojta

Physics Faculty Research & Creative Works

The conductivity and the tunneling density of states of disordered itinerant electrons in the vicinity of a ferromagnetic transition at low temperature are discussed. Critical fluctuations lead to nonanalytic frequency and temperature dependencies that are distinct from the usual long-time tail effects in a disordered Fermi liquid. The crossover between these two types of behavior is proposed as an experimental check of recent theories of the quantum ferromagnetic critical behavior. In addition, the quasiparticle properties at criticality are shown to be those of a marginal Fermi liquid.

Binary Condensation In A Supersonic Nozzle, Barbara Ellen Wyslouzil, Christopher H. Heath, Janice L. Cheung, Gerald Wilemski

Physics Faculty Research & Creative Works

We present data from the first systematic studies of binary condensation in supersonic nozzles. The apparatus used to conduct the experiments is described in detail, and the important issues of stability and reproducibility of the experiments are discussed. Experiments were conducted with water, ethanol, propanol, and binary mixtures of these compounds. Onset was determined in the temperature range of 190-215 K, and for each mixture composition the pressures of the condensible species at an onset temperature of 207 K were determined. For the ideal ethanol-propanol mixtures, the onset pressures at constant temperature vary almost linearly between those of the pure …

Simulation Of Daily And Monthly Stream Discharge From Small Watersheds Using The Swat Model, Crystal A. Spruill, Stephen R. Workman, Joseph L. Taraba

Biosystems and Agricultural Engineering Faculty Publications

The Soil and Water Assessment Tool (SWAT) was evaluated and parameter sensitivities were determined while modeling daily streamflows in a small central Kentucky watershed over a two-year period. Streamflow data from 1996 were used to calibrate the model and streamflow data from 1995 were used for evaluation. The model adequately predicted the trends in daily streamflow during this period although Nash-Sutcliffe R² values were –0.04 and 0.19 for 1995 and 1996, respectively. The model poorly predicted the timing of some peak flow values and recession rates during the last half of 1995. Excluding daily peak flow values from August …

Curriculum Minutes 11/01/2000, Curriculum Committee

Curriculum Committee Minutes

No abstract provided.

Extensible Mpeg-4 Textual Format (Xmt), Michelle Kim, Steve Wood, Lai-Tee Cheok

Research Collection School Of Computing and Information Systems

This paper describes the Extensible MPEG-4 Textual format (XMT), a framework for representing MPEG-4 scene description using a textual syntax. The XMT allows the content authors to exchange their content with other authors, tools or service providers, and facilitates interoperability with both the X3D, developed by the Web3D consortium, and the Synchronized Multimedia Integration Language (SM1L) from the W3C consortium.

Automated Systematic Testing For Constraint-Based Interactive Services, Patrice Godefroid, Lalita Jategaonkar Jagadeesan, Radha Jagadeesan, Konstantin Laufer

Computer Science: Faculty Publications and Other Works

Constraint-based languages can express in a concise way the complex logic of a new generation of interactive services for applications such as banking or stock trading, that must support multiple types of interfaces for accessing the same data. These include automatic speech-recognition interfaces where inputs may be provided in any order by users of the service. We study in this paper how to systematically test event-driven applications developed using such languages. We show how such applications can be tested automatically, without the need for any manually-written test cases, and effi- ciently, by taking advantage of their capability of taking unordered …

Two-Dimensional Pendulum Experiments Using A Spark Generator, Rand S. Worland, Matthew J. Moelter

Physics

Student understanding of the superposition of perpendicular harmonic oscillators can be enhanced using a spark generator to record position-versus-time data for smallamplitude pendulum motion in two dimensions. Our students have used this arrangement to analyze the motion of a spherical pendulum and a “Y-suspended” (Blackburn) pendulum that has two effective lengths.

Inference Of Tidal Elevation In Shallow Water Using A Vessel-Towed Acoustic Doppler Current Profiler, Chunyan Li, Arnoldo Valle-Levinson, Larry P. Atkinson, Tom C. Royer

CCPO Publications

Vessel-towed acoustic Doppler current profilers (ADCPs) have been widely used to measure velocity profiles. Since the instrument is usually mounted on a catamaran floating on the surface, previous studies have used the water surface as the reference level from which the vertical coordinate for the velocity profile is defined. However, because of the tidal oscillation, the vertical coordinate thus defined is time-dependent in an Earth-coordinate system, which introduces an error to the estimated harmonic constants for the velocity. As a result, the total transport will also be in error. This is particularly a problem in shallow waters where the tidal …

Profiting From Adversity - Meeting The Challenge Of Salinity Through New Industry Development, Andrew Quinn, Tamara Law, Peter Rowe

Natural resources published reports

Salinity in the Wheatbelt of Western Australia is one of the most significant challenges facing the State's agricultural sector.

Efforts to manage the increasing effect of salt influenced and threatened farming land requires not only the implementation of new farming systems, but a new way of thinking and attitude to production more in tune with environmental and technological limitations.

While past environment lobby pressures have significantly focused on other production activities such as mining and forestry, the future is likely to see increased community interest in agricultural production systems.

Consumers World wide are becoming more environmentally sensitive, with global media …

Low Recharge Farming Systems. Case Studies On The South Coast, Arjen Ryder, Jamie Bowyer, Gerry Skinner, Clare Mccarron

Natural resources published reports

This booklet is intended as a guide to assist land managers to design or select low recharge farming systems. Options that increase water use are described with benefits and issues for each option.

Case studies describe the experiences of landholders who have had a go at establishing and managing such systems. Examples are included from different rainfall zones. The systems mentioned in this manual are only a guide.

Case studies describe the experiences of landholders who have hada go at establishing and managing such systems. Examples are included from different rainfall zones. The systems mentioned in this manual are only …

Electric Field-Induced Acoustic-Optic Mode Coupling In An Anticlinic Liquid Crystal, Shiyong Zhang, Rolfe G. Petschek, Charles Rosenblatt

Faculty Scholarship

A dc electric field was applied perpendicular to the tilt plane of a pitch-compensated (unwound helix) anticlinic liquid crystal. By means of quasielastic light scattering, the field was found to couple the acoustic and optic Goldstone modes, resulting in an increase of the relaxation time τβ of the acoustic like eigenmode. Elastic constants were estimated from the relaxation time data.

The Bg News November 1, 2000, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. November 1, 2000. Volume 86-Issue 46.

The Parthenon, November 1, 2000, Marshall University

The Parthenon

No abstract provided.

Performance Enhancement By Memory Reduction, Yonghong Song, Rong Xu, Cheng Wang, Zhiyuan Li

Department of Computer Science Technical Reports

No abstract provided.

Gasturbnlab Simulation Of Instability In A Gas Turbine, A. C. Catlin, S. Fleeter, Elias N. Houstis, John R. Rice, C. Zhou

Department of Computer Science Technical Reports

No abstract provided.

An Access Protocol To Provide Qos In Wireless :Networks, Xin Liu, Edwin K. P. Chong, Ness B. Shroff

Department of Electrical and Computer Engineering Technical Reports

In wireless networks, contention-and-reservation schemes provitle promising implementations of packet switching, which efficiently multiplexes different classes of traffic. In this report, we present an access scheme to satisfy the QoS requirements for two classes of traffic during the contention-based communicat,ion. In this algorithm, different classes of users contend with other users for resources based on controlled class-dependent permission probabilities. We prove that our algorithm is stable for a large class of arrival processes. Under certain QoS requirements, we derive an upper-bound for the throughput for a general class of random access algorithms. We show that the throughput of our algorithm …

Efficient Balance-And-Truncate Model Reduction For Large Scale Systems , Venkataramanan Balakrishnan, Qing Su, Cheng-Kok Koh

Department of Electrical and Computer Engineering Technical Reports

We present efficient implement at ions of the balanceand- truncate model reduction technique for large-scale systems. The key observation that distinguishes our approach is that Krylov subspace methods (Arnoldi and Lanczos) directly yield approximate low-rank square roots1 of the system Gramians; the balancing transformation can be then constructed from these square roots, obviating the need for solving any Lyapunov equations. In addition, the order of the reduced model is not fixed a priori as with some existing methods, but is determined from the problem data. Numerical simulations show t,hat our approach performs very well over a range of examples, and …