Digital Commons Network^™

First Measurement Of The Double Spin Asymmetry In →E→P → E ‘Π⁺ In The Resonance Region, G. E. Dodge, K. V. Dharmawardane, T. A. Forest, C. E. Hyde-Wright, A. Klein, S. E. Kuhn, R. A. Niyazov, L. B. Weinstein, J. Yun, Et. Al., Clas Collaboration

Physics Faculty Publications

The double spin asymmetry in the ^→e^→p → e' π⁺n reaction has been measured for the first time in the resonance region for four-momentum transfer Q² = 0.35-1.5 GeV². Data were taken at Jefferson Lab with the CLAS detector using a 2.6 GeV polarized electron beam incident on a polarized solid NH₃ target. Comparison with predictions of phenomenological models shows strong sensitivity to resonance contributions. Helicity-1/2 transitions are found to be dominant in the second and third resonance regions. The measured asymmetry is consistent with a faster rise with Q^{2 …}

Object Persistence And Availability In Digital Libraries, Michael L. Nelson, B. Danette Allen

Computer Science Faculty Publications

We have studied object persistence and availability of 1,000 digital library (DL) objects. Twenty World Wide Web accessible DLs were chosen and from each DL, 50 objects were chosen at random. A script checked the availability of each object three times a week for just over 1 year for a total of 161 data samples. During this time span, we found 31 objects (3% of the total) that appear to no longer be available: 24 from PubMed Central, 5 from IDEAS, 1 from CogPrints, and 1 from ETD.

A Scalable Architecture For Harvest-Based Digital Libraries, Xiaoming Liu, Tim Brody, Stevan Harnard, Les Carr, Kurt Maly, Mohammad Zubair, Michael L. Nelson

Computer Science Faculty Publications

This article discusses the requirements of current and emerging applications based on the Open Archives Initiative (OAI) and emphasizes the need for a common infrastructure to support them. Inspired by HTTP proxy, cache, gateway and web service concepts, a design for a scalable and reliable infrastructure that aims at satisfying these requirements is presented. Moreover, it is shown how various applications can exploit the services included in the proposed infrastructure. The article concludes by discussing the current status of several prototype implementations.

Federated Searching Interface Techniques For Heterogeneous Oai Repositories, Xiaoming Liu, Kurt Maly, Mohammad Zubair, Qiaoling Hong, Michael L. Nelson, Frances Knudson, Irma Holtkamp

Computer Science Faculty Publications

Federating repositories by harvesting heterogeneous collections with varying degrees of metadata richness poses a number of challenging issues: (1) how to address the lack of uniform control for various metadata fields in terms of building a rich unified search interface, and (2) how easily new collections and freshly harvested data in existing repositories can be incorporated into the federation supporting a unified interface? This paper focuses on the approaches taken to address these issues in Arc, an Open Archives Initiative compliant federated digital library. At present Arc contains over 1M metadata records from 75 data providers from various subject domains. …

The Single Row Routing Problem Revisited: A Solution Based On Genetic Algorithms, Albert Y. Zomaya, Roger Karpin, Stephan Olariu

Computer Science Faculty Publications

With the advent of VLSI technology, circuits with more than one million transistors have been integrated onto a single chip. As the complexity of ICs grows, the time and money spent on designing the circuits become more important. A large, often dominant, part of the cost and time required to design an IC is consumed in the routing operation. The routing of carriers, such as in IC chips and printed circuit boards, is a classical problem in Computer Aided Design. With the complexity inherent in VLSI circuits, high performance routers are necessary. In this paper, a crucial step in the …

Research In Technology Education: Back To The Future, Philip A. Reed

STEMPS Faculty Publications

No abstract provided.

The Mind Museum: Rudolf Schwarzkogler And The Vienna Actionists, Philip Barnes

Reconstruction: Studies in Contemporary Culture

[Sixth paragraph]

In the following essay I discuss the Austrian artist Rudolf Schwarzkogler. I have enjoyed the process of ferreting out articles and references to him, although these are seemingly as scarce as his own artistic output. Schwarzkogler spent just 2 years staging performance-actions in his apartment in the 1960s. These methodically photographed scenes involved sliced fish, bandages, light bulbs, razor blades, foodstuffs and surgical apparatus, all manipulated by anonymous figures. The photographs, works of art in their own right, have since toured internationally. Schwarzkogler was the least outgoing of a group called the Viennese Actionists, whose orgiastic, bloody Happenings …

Solaris, America, Disneyworld And Cyberspace: Salman Rushdie's Fairy-Tale Utopianism In Fury, Justyna Deszcz

Reconstruction: Studies in Contemporary Culture

[First paragraph]

In this paper, I discuss the figure of professor Malik Solanka, the protagonist of Salman Rushdie's latest novel, Fury (2001), and his attempts at constructing a fairy tale utopia as a means of establishing his identity. I try to elucidate this problem referring to the concepts of the fairy tale utopian as formulated by J. R. R. Tolkien, Ernst Bloch, and Jack Zipes, as their propositions can be regarded as the most effective exponents of the utopian imagination and seem very applicable to Rushdie's utopian attempts. On the basis of such a reading, I also reflect on the …

Rich Earth Below The Sand' And The Origins Of The Thames Embankments, Stuart Oliver

Reconstruction: Studies in Contemporary Culture

[First paragraph]

This essay explores the designing of the Thames embankments that were built between 1866 and 1874 for the Metropolitan Board of Works. In particular it concentrates on the origins of what might be called the production of the conditions of production of the embankments. By looking at the motivation of those advocating embanking as a means of exerting literal and figurative control over the river, and the ways in which society influenced such advocacy and determined its effectiveness, the essay explores modernity's construction of a regulated natural in the context of an analysis that is sensitive to the …

Rorty's Complicit American Neo-Pragmatism, Haidar Eid

Reconstruction: Studies in Contemporary Culture

[First paragraph]

Despite the obvious French origin of poststructuralism, its paradigmatic resonance can be found in the American philosophical scene, an essential part of which is Richard Rorty's neo-pragmatism -- the theoretical basis of American (post)modernism. However, different from poststructuralism's apparent antagonism to the authoritarian establishments, Rorty adopts the Derridean poststructuralist motifs of the decentering of the subject, and the disappearance of meaning and truth in order to defend the establishment -- or rather, the status quo.

Breaking The Mimetic Contract: Notes On Ideology, Intersubjectivity, And Film Theory, Giorgio Bertellini, C. Paul Sellors

Reconstruction: Studies in Contemporary Culture

[First paragraph]

In this essay we would like to sketch out a few notes outlining historical and theoretical trajectories of the confusing, and often confused, relationships between ideology, history and subjectivity in Marx, Marxism and post-Marxism. Marx and Engels' approach to ideology in The German Ideology (1845-46), spawned and influenced a variety of interpretations and philosophical positions from not only the numerous schools of Marxism proper, but also structuralism, semiotics and psychoanalysis up to the very raison d'être of discourse theory and new historicism. This reaching influence occurs only at the cost of contradiction, however, between Marxist factions -- disagreements …

Terra Incognita, Leslie Hill

Reconstruction: Studies in Contemporary Culture

No abstract provided.

Haunting And Hunting: Bodily Resurrection And The Occupation Of History In Thomas Pynchon's Mason & Dixon, Justin Scott Coe

Reconstruction: Studies in Contemporary Culture

[First paragraph]

Just before publication of Mason & Dixon, Thomas Pynchon wrote a review of Gabriel Garcia Marquez's Love in the Time of Cholera, in which he says that to assert the resurrection of the body [is] today as throughout history an unavoidably revolutionary idea (Heart's Eternal Vow). That this revolutionary idea is essentially a religious one is a fact that many Pynchon critics attempt to placate by identifying in his works a secularization of religious themes. Robert Hipkiss identifies, in place of religion, a search for an operative spiritual force in Pynchon's previous novels, which he assures us is …

Mechanism For Membrane Electroporation Irreversibility Under High-Intensity, Ultrashort Electrical Pulse Conditions, R. P. Joshi, K. H. Schoenbach

Bioelectrics Publications

An improved electroporation model is used to address membrane irreversibility under ultrashort electric pulse conditions. It is shown that membranes can survive a strong electric pulse and recover provided the pore distribution has a relatively large spread. If, however, the population consists predominantly of larger radii pores, then irreversibility can result. Physically, such a distribution could arise if pores at adjacent sites coalesce. The requirement of close proximity among the pore sites is more easily satisfied in smaller organelles than in outer cell membranes. Model predictions are in keeping with recent observations of cell damage to intracellular organelles (e.g., mitochondria), …

Advances In Space Radiation Shielding Codes, John W. Wilson, Ram K. Tripathi, Garry D. Qualls, Francis A. Cucinotta, Richard E. Prael, John W. Norbury, John H. Heinbockel, John Tweed, Giovanni De Angelis

Mathematics & Statistics Faculty Publications

Early space radiation shield code development relied on Monte Carlo methods and made important contributions to the space program. Monte Carlo methods have resorted to restricted one-dimensional problems leading to imperfect representation of appropriate boundary conditions. Even so, intensive computational requirements resulted and shield evaluation was made near the end of the design process. Resolving shielding issues usually had a negative impact on the design. Improved spacecraft shield design requires early entry of radiation constraints into the design process to maximize performance and minimize costs. As a result, we have been investigating high-speed computational procedures to allow shield analysis from …

Organizational Climate And Commitment: A Case Study Of An Urban Nonprofit Organization, William Sawyer Grant

Theses and Dissertations in Urban Services - Urban Management

This qualitative study investigates the relationship between the two constructs: Organizational Climate and Organizational Commitment.

Litwin and Stringer (1968) suggested that a molar model is needed to explain employee behavior and motivation. Climate was proposed as this molar construct. Research concerning Organizational Climate resulted in multiple definitions and little consensus concerning the number and use of multiple dimensions of this construct. The almost exclusive use of survey methods coupled with methodological confusion with Organizational Culture created difficulty with the use of this important construct.

Organizational Commitment research resulted in a number of competing definitions. Research by Meyer and Allen (1997) …

Supersonic Combustion And Mixing Characteristics Of Hydrocarbon Fuels In Screamjet Engines, Ahmed A. Taha

Mechanical & Aerospace Engineering Theses & Dissertations

The combustion characteristics of gaseous propane in supersonic airflow using the rearward-facing step that is swept inward from both end sides is studied. The effect of sweeping the step on the flow field features of propane combustion is investigated.

The study of the supersonic combustion of ethylene is carried out using different combustor configurations, different main fuel equivalence ratios, and different pilot fuel equivalence ratios.

The swept step shows the ability to hold the propane flame in the supersonic air stream without extinction. It was found that the side sweeping of the combustor exhibits the high temperature and combustion products …

Atomic Hydrogen Cleaning Of Inp(100): Electron Yield And Surface Morphology Of Negative Electron Affinity Activated Surfaces, M. A. Hafez, H. E. Elsayed-Ali

Electrical & Computer Engineering Faculty Publications

Atomic hydrogen cleaning of the InP(100) surface has been investigated using quantitative reflection high-energy electron diffraction. The quantum efficiency of the surface when activated to negative electron affinity was correlated with surface morphology. The electron diffraction patterns showed that hydrogen cleaning is effective in removing surface contaminants, leaving a clean, ordered, and (2×4)-reconstructed surface. After activation to negative electron affinity, a quantum efficiency of ∼6% was produced in response to photoactivation at 632 nm. Secondary electron emission from the hydrogen-cleaned InP(100)-(2×4) surface was measured and correlated to the quantum efficiency. The morphology of the vicinal InP(100) surface was investigated using …

The Relationship Between A Sense Of Urgency Implementation And Successful Change Strategies In Organizations, Brian Keith Baxter

OTS Master's Level Projects & Papers

The focus of this study was to determine how the sense of urgency has caused the implementation of successful change initiatives in management practices in organizations. How was "establishing a sense of urgency" actually applied in the organizational change process?

Part 1: Hampton Roads… A Comparative Tour, Regional Studies Institute, Old Dominion University

State of the Region Reports: Hampton Roads

We compare Hampton Roads to other metropolitan areas by means of more than 30 different economic, social, and educational variables. This section should be a valuable reference

Variation In The Position Of The Upwelling Front On The Oregon Shelf, Jay A. Austin, John A. Barth

CCPO Publications

As part of an experiment to study wind-driven coastal circulation, 17 hydrographic surveys of the middle to inner shelf region off the coast of Newport, OR (44.65°N, from roughly the 90 m isobath to the 10 m isobath) were performed during Summer 1999 with a small, towed, undulating vehicle. The cross-shelf survey data were combined with data from several other surveys at the same latitude to study the relationship between upwelling intensity and wind stress field. A measure of upwelling intensity based on the position of the permanent pycnocline is developed. This measure is designed so as to be insensitive …

Distance Learning In Industrial Teacher Education Programs, Hassan B. Ndahi, John M. Ritz

STEMPS Faculty Publications

No abstract provided.

Acceleration Element For Femtosecond Electron Pulse Compression, Bao-Liang Qian, Hani E. Elsayed-Ali

Electrical & Computer Engineering Faculty Publications

An acceleration element is proposed for compressing the electron pulse duration in a femtosecond photoelectron gun. The element is a compact metal cavity with curved-shaped walls. An external voltage is applied to the cavity where a special electric field forms in such a way that the slow electrons in the electron pulse front are accelerated more than the fast electrons, and consequently the electron pulse duration will be compressed. The distribution of the electric field inside the acceleration cavity is analyzed for the geometry of the cavity. The electron dynamics in this acceleration cavity is also investigated numerically. Numerical results …

High-Efficiency Solar Cells Based On Cu(Inal)Se[Sub 2] Thin Films, S. Marsillac, P. D. Paulson, M. W. Haimbodi, R. W. Birkmire, W. N. Shafarman

Electrical & Computer Engineering Faculty Publications

A Cu(InAl)Se₂solar cell with 16.9% efficiency is demonstrated using a Cu(InAl)Se₂thin film deposited by four-source elemental evaporation and a device structure of glass/Mo/Cu(InAl)Se₂/CdS/ZnO/indium tin oxide/(Ni/Algrid)/MgF₂. A key to high efficiency is improved adhesion between the Cu(InAl)Se₂ and the Mo back contact layer, provided by a 5-nm-thick Ga interlayer, which enabled the Cu(InAl)Se₂ to be deposited at a 530 °C substrate temperature. Film and device properties are compared to Cu(InGa)Se₂ with the same band gap of 1.16 eV. The solar cells have similar behavior, with performance limited by recombination through …

Effect Of Cr3+ And So42- On The Structure Of Rust Layer Formed On Steels By Atmospheric Corrosion, Masato Yamashita, Hitoshi Uchida,, Desmond C. Cook .

Physics Faculty Publications

The effect of chromium ion (Cr³⁺) and sulfate ion (SO₄^2-) on the structure of the rust layer formed by thin electrolyte-film corrosion of low-alloy steels has been examined. By using X-ray diffraction spectroscopy, it was found that coexistence of Cr³⁺ and SO₄^2- in the electrolyte film covering the steel surface quickly forms the Cr-goethite (α-(Fe _1-X, Cr_X)OOH) layer which has been known as the final protective rust layer. Scanning vibrating electrode measurements showed that the rust layer formed under the electrolyte film containing Cr³⁺ and SO₄^{2- …}

Systemic Issues In Asynchronous Delivery Of Graduate Engineering Management Programs, Charles Keating, David Dryer, Andres Sousa-Poza, William Peterson, Robert Safford

Engineering Management & Systems Engineering Faculty Publications

The purpose of this paper is to examine systemic issues that impact the design, delivery, and maintenance of asynchronous engineering management educational products. Asynchronous education continues to rapidly evolve as an alternative to traditional classroom delivery. An asynchronous educational system requires the effective integration of technology, supporting processes, and infrastructure design to prepare, deliver, and maintain asynchronous educational products. Currently, the technological capabilities for delivery of asynchronous education have outstripped the ability to maximize those advanced technologies. To help understand this rift between technology and our ability to deploy that technology this paper examines three critical areas. First, the distinctions …

Engineering Management- The Minor Of Choice, William Peterson, Paul Kauffmann, Charles Keating, Resit Unal

Engineering Management & Systems Engineering Faculty Publications

The minor in engineering management provides several real benefits to undergraduate engineering and engineering technology students, not the least of which can be a substantially larger starting salary. The other benefits it offers students are in the skill sets developed (project management, engineering economics, organization behavior / principles of management, and either statistical concepts or decision techniques), the preparation to start an engineering management graduate degree, and the bridging of the competency gaps identified in several national surveys. This paper addresses the benefits of the minor to engineering management programs.

Continuity In Dynamic Coalition Operations, Holly A. H. Handley, Larry K. Wentz, Alexander H. Levis

Engineering Management & Systems Engineering Faculty Publications

The combination of participating organizations in a coalition operation often changes over time; the coalition is dynamic and evolves over the course of its mission. A given organization may participate in the coalition only at the stage where its expertise or resources are most needed, while other organizations may participate through the entire course of the operation. As these are independent organizations coming together for a limited time to meet a specific goal, the structure of the coalition must be able to accommodate the different command arrangements, procedures, and other characteristics of each organization. In order to develop a theory …

A Task Process Pre-Experimental Model, Holly A. H. Handley, Alexander H. Lewis

Engineering Management & Systems Engineering Faculty Publications

The Adaptive Architectures for Command and Control (A2C2) program is a multidisciplinary program that employs a scientific basis for designing and analyzing adaptive and reconfigurable organizational structures at the Joint Task Force level. As part of its unique model-driven experimentation method, a pre-experimental model is created to support the formulation of hypotheses, the determination of key variables and parameter values, and the prediction of organizational performance. The pre-experimental model is used to explore the parameters of the experimental design in order to determine the appropriate region to conduct officer-in-the-loop experiments at the Naval Postgraduate School. A pre-experimental model based on …

A Policy-Based Resource Brokering Environment For Computational Grids, Ahmed Hamdan Al-Theneyan

Computer Science Theses & Dissertations

With the advances in networking infrastructure in general, and the Internet in particular, we can build grid environments that allow users to utilize a diverse set of distributed and heterogeneous resources. Since the focus of such environments is the efficient usage of the underlying resources, a critical component is the resource brokering environment that mediates the discovery, access and usage of these resources. With the consumer's constraints, provider's rules, distributed heterogeneous resources and the large number of scheduling choices, the resource brokering environment needs to decide where to place the user's jobs and when to start their execution in a …