Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2005

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 9121 - 9150 of 10377

Full-Text Articles in Entire DC Network

Journal Of Mathematics And Science: Collaborative Explorations Jan 2005

Journal Of Mathematics And Science: Collaborative Explorations

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Mathematics Specialists In Alexandria City Public Schools, S. Birnie Jan 2005

Mathematics Specialists In Alexandria City Public Schools, S. Birnie

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Mathematics Teacher Specialists – Making A Difference For Student Learning, T. Rowan Jan 2005

Mathematics Teacher Specialists – Making A Difference For Student Learning, T. Rowan

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Hopewell, Virginia: How Do You "Hook" Elementary Teachers Into Enjoying And Seeing The Beauty Of Mathematics?, Y. Smith-Jones Jan 2005

Hopewell, Virginia: How Do You "Hook" Elementary Teachers Into Enjoying And Seeing The Beauty Of Mathematics?, Y. Smith-Jones

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Designing Professional Development Activities For Mathematics Specialists, V. Bastable, L. Menster Jan 2005

Designing Professional Development Activities For Mathematics Specialists, V. Bastable, L. Menster

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Aims & Scope Jan 2005

Aims & Scope

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Flexible Multiobjective Control Of Power Converter In Active Hybrid Fuel Cell/Battery Power Sources, Zhenhua Jiang, Lijun Gao, Roger A. Dougal Jan 2005

Flexible Multiobjective Control Of Power Converter In Active Hybrid Fuel Cell/Battery Power Sources, Zhenhua Jiang, Lijun Gao, Roger A. Dougal

Faculty Publications

Hybrid power sources composed of fuel cells and secondary batteries can combine the high energy density of fuel cells with the high power density of batteries. A dc/dc power converter can be placed between the fuel cell and the battery to balance the power flow and greatly augment the peak output power. This paper presents a novel, flexible strategy for multiobjective control of the power converter in the hybrid power source. The control strategy is able to regulate the output current of the fuel cell and the charging current or voltage of the battery while limiting the discharging current of …

Go to article

Securities Industry Developments - 2005/06; Audit Risk Alerts, American Institute Of Certified Public Accountants. Auditing Standards Division Jan 2005

Securities Industry Developments - 2005/06; Audit Risk Alerts, American Institute Of Certified Public Accountants. Auditing Standards Division

Industry Guides (AAGs), Risk Alerts, and Checklists

No abstract provided.

Go to article

Evidence For Alignment Of The Rotation And Velocity Vectors In Pulsars, Simon Johnston, G. Hobbs, S. Vigeland, M. Kramer, J. M. Weisberg, A. G. Lyne Jan 2005

Evidence For Alignment Of The Rotation And Velocity Vectors In Pulsars, Simon Johnston, G. Hobbs, S. Vigeland, M. Kramer, J. M. Weisberg, A. G. Lyne

Physics and Astronomy Faculty Work

We review our case for strong observational evidence for a relationship between the direction of a pulsar’s motion and its rotation axis. The information comes from calibrated polarization data for 20 pulsars which display linearly polarized emission from the pulse longitude at closest approach to the magnetic pole. Of these 20 pulsars, 10 show an offset in the angle between the velocity vector and the polarisation position angle which is either less than 10◦ or more than 80◦ , a fraction which is very unlikely by random chance. We believe that the bimodal nature of the distribution arises from the …

Go to article

Coarse-Grained Entropy Decrease And Phase-Space Focusing In Hamiltonian Dynamics, Arjendu K. Pattanayak, Daniel W. C. Brooks, Anton De La Fuente, Lawrence Uricchio, Edward Holby, Daniel Krawisz, Jorge I. Silva Jan 2005

Coarse-Grained Entropy Decrease And Phase-Space Focusing In Hamiltonian Dynamics, Arjendu K. Pattanayak, Daniel W. C. Brooks, Anton De La Fuente, Lawrence Uricchio, Edward Holby, Daniel Krawisz, Jorge I. Silva

Physics and Astronomy Faculty Work

We analyze the behavior of the coarse-grained entropy for classical probabilities in nonlinear Hamiltonians. We focus on the result that if the trajectory dynamics are integrable, the probability ensemble shows transient increases in the coherence, corresponding to an increase in localization of the ensemble and hence the phasespace density of the ensemble. We discuss the connection of these dynamics to the problem of cooling in atomic ensembles. We show how these dynamics can be understood in terms of the behavior of individual trajectories, allowing us to manipulate ensembles to create “cold” dense final ensembles. We illustrate these results with an …

Go to article

Low-Temperature Glassy Response Of Ultrathin La0.8ca0.2mn03 Films To Electric And Magnetic Fields, A. Bhattacharya, Melissa Eblen-Zayas,, N. E. Staley, A. L. Kobrinskii, A. M. Goldman Jan 2005

Low-Temperature Glassy Response Of Ultrathin La0.8ca0.2mn03 Films To Electric And Magnetic Fields, A. Bhattacharya, Melissa Eblen-Zayas,, N. E. Staley, A. L. Kobrinskii, A. M. Goldman

Physics and Astronomy Faculty Work

The glassy response of ultrathin films of La0.8Ca0.2MnO3 in the mixed phase to external magnetic and gated electro-static fields have been studied at low temperatures. The response of the resistance to external fields provides direct evidence for a hierarchical energy landscape, with strong cross-couplings between spin and charge. Magnetic coercivity measurements indicate that strong magnetic disorder accompanies the mixed phase in these films. This magnetic disorder, and the resultant coercivity, can be decreased by cooling in a large magnetic field or by electrostatic gating.

Go to article

President's Report, 2005, University Of Montana (Missoula, Mont.). Office Of The President Jan 2005

President's Report, 2005, University Of Montana (Missoula, Mont.). Office Of The President

University of Montana President’s Report, 1993-2016

The President’s Report of the University of Montana, produced by University Relations on behalf of the President’s Office.

Go to article

Strafford County 2004 Annual Report Of The Commissioners, Treasurer, Other County Officers And The Strafford County Delegation Strafford County, New Hampshire For The Year Ending December 31, 2004., Stafford County Representatives Jan 2005

Strafford County 2004 Annual Report Of The Commissioners, Treasurer, Other County Officers And The Strafford County Delegation Strafford County, New Hampshire For The Year Ending December 31, 2004., Stafford County Representatives

Strafford County, NH Annual Reports

This is an annual report containing vital statistics for a county in the state of New Hampshire.

Go to article

Using Howard Gardner's Entry-Point Framework To Analyze A Multiple Intelligence Collaborative Unit Including A Multigenre Research Paper And Altered Books, Julia Richardson Radtke Jan 2005

Using Howard Gardner's Entry-Point Framework To Analyze A Multiple Intelligence Collaborative Unit Including A Multigenre Research Paper And Altered Books, Julia Richardson Radtke

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Go to article

Matrix Model Superpotentials And Calabi–Yau Spaces: An A-D-E Classification, Carina Curto Jan 2005

Matrix Model Superpotentials And Calabi–Yau Spaces: An A-D-E Classification, Carina Curto

Department of Mathematics: Faculty Publications

We use F. Ferrari’s methods relating matrix models to Calabi-Yau spaces in order to explain Intriligator and Wecht’s ADE classification of N = 1 superconformal theories which arise as RG fixed points of N = 1 SQCD theories with adjoints. The connection between matrix models and N = 1 gauge theories can be seen as evidence for the Dijkgraaf–Vafa conjecture. We find that ADE superpotentials in the Intriligator–Wecht classification exactly match matrix model superpotentials obtained from Calabi-Yau’s with corresponding ADE singularities. Moreover, in the additional Ô, Â, Dˆ and Ê cases we find new singular geometries. These ‘hat’ geometries are …

Go to article

Exploiting The Advantages Of Object-Based Dsm In A Heterogeneous Cluster Environment, Xuli Liu, Hong Jiang, Leen-Kiat Soh Jan 2005

Exploiting The Advantages Of Object-Based Dsm In A Heterogeneous Cluster Environment, Xuli Liu, Hong Jiang, Leen-Kiat Soh

School of Computing: Conference and Workshop Papers

In recent years, increasing effort has been made by the cluster and grid computing community to build object- based Distributed Shared Memory systems (DSM) in a cluster environment. In most of these systems, a shared object is simply used as a data-exchanging unit so as to alleviate the false-sharing problem, and the advantages of sharing objects remain to be fully exploited. Thus, this paper is motivated to investigate the potential advantages of object-based DSM. For example, the performance of a distributed application may be significantly improved by adaptively and judiciously setting the size of the shared objects, i.e., granularity. This …

Go to article

Registered Irrigation Wells In Nebraska August 2005, Conservation And Survey Division Jan 2005

Registered Irrigation Wells In Nebraska August 2005, Conservation And Survey Division

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Go to article

Real-Time Divisible Load Scheduling For Cluster Computing, Xuan Lin, Ying Lu, Jitender S. Deogun, Steve Goddard Jan 2005

Real-Time Divisible Load Scheduling For Cluster Computing, Xuan Lin, Ying Lu, Jitender S. Deogun, Steve Goddard

School of Computing: Technical Reports

Cluster Computing has emerged as a new paradigm for solving large-scale problems. To enhance QoS and provide performance guarantees in cluster computing environments, various workload models and real-time scheduling algorithms have been investigated. The divisible load model, propagated by divisible load theory, models computations that can be arbitrarily divided into independent pieces and provides a good approximation of many real-world applications. However, researchers have not yet investigated the problem of providing performance guarantees to divisible load applications. Two contributions are made in this paper: (1) divisible load theory is extended to compute the minimum number of processors required to meet …

Go to article

Disseminating Usability Design Knowledge Through Ontology-Based Pattern Languages, Scott Henninger, Padmapriya Ashokkumar Jan 2005

Disseminating Usability Design Knowledge Through Ontology-Based Pattern Languages, Scott Henninger, Padmapriya Ashokkumar

School of Computing: Technical Reports

Usability patterns represent knowledge about known ways to design graphical user interfaces that are usable and meet the needs and expectations of users. There is currently a plethora of usability patterns published in books, private repositories and the World-Wide Web. The dominance of pattern discovery efforts has neglected the emerging need to organize the patterns so they can become a proactive resource for developing interfaces. This paper presents an approach using Semantic Web concepts that turns informal patterns into formal representations capable of supporting systematic design methods. Through this method, loosely coupled pattern collections can be turned into strongly coupled …

Go to article

Dgkd: Distributed Group Key Distribution With Authentication Capability, Pratima Adusumilli, Xukai Zou, Byrav Ramamurthy Jan 2005

Dgkd: Distributed Group Key Distribution With Authentication Capability, Pratima Adusumilli, Xukai Zou, Byrav Ramamurthy

School of Computing: Conference and Workshop Papers

Group key management (GKM} is the most important issue in secure group communication (SCC). The existing GKM protocols fall into three typical classes: centralized group key distribution (CGKD), decentralized group key management (DGKM), and distributed/contributory group key agreement (CGKA). Serious problems remains in these protocols, as they require existence of central trusted entities (such as group controller or subgroup controllers), relaying of messages (by subgroup controllers), or strict member synchronization (JOT multiple round stepwise key agreement), thus suffering from the single point of failure and attack, performance bottleneck, or mis-operations in the situation of transmission delay or network failure. In …

Go to article

Disseminating Usability Design Knowledge Through Ontology-Based Pattern Languages, Scott Henninger, Padmapriya Ashokkumar Jan 2005

Disseminating Usability Design Knowledge Through Ontology-Based Pattern Languages, Scott Henninger, Padmapriya Ashokkumar

School of Computing: Technical Reports

Usability patterns represent knowledge about known ways to design graphical user interfaces that are usable and meet the needs and expectations of users. There is currently a plethora of usability patterns published in books, private repositories and the World-Wide Web. The dominance of pattern discovery efforts has neglected the emerging need to organize the patterns so they can become a proactive resource for developing interfaces. This paper presents an approach using Semantic Web concepts that turns informal patterns into formal representations capable of supporting systematic design methods. Through this method, loosely coupled pattern collections can be turned into strongly coupled …

Go to article

Crtdh: An Efficient Key Agreement Scheme For Secure Group Communications In Wireless Ad Hoc Networks, Ravi K Balachandran, Byrav Ramamurthy, Xukai Zou, N.V. Vinodchandran Jan 2005

Crtdh: An Efficient Key Agreement Scheme For Secure Group Communications In Wireless Ad Hoc Networks, Ravi K Balachandran, Byrav Ramamurthy, Xukai Zou, N.V. Vinodchandran

School of Computing: Conference and Workshop Papers

As a result of the growing popularity of wireless networks, in particular ad hoc networks, security over such networks has become very important. In this paper, we study the problem of secure group communications (SGC) and key management over ad hoc networks. We identify the key features of any SGC protocol for such networks. We also propose an efficient key agreement scheme for SGC. The scheme solves two important problems that exist in most current SGC schemes: requirement of member serialization and existence of a central entity. Besides this, the protocol also has many highly desirable properties such as contributory …

Go to article

Same-Destination-Intermediate Grouping Vs. End-To-End Grouping For Waveband Switching In Wdm Mesh Networks, Mengke Li, Wang Yao, Byrav Ramamurthy Jan 2005

Same-Destination-Intermediate Grouping Vs. End-To-End Grouping For Waveband Switching In Wdm Mesh Networks, Mengke Li, Wang Yao, Byrav Ramamurthy

School of Computing: Conference and Workshop Papers

We investigate waveband switching (WBS) with different grouping strategies in wavelength-division multiplexing (WDM) mesh networks. End-to-end waveband switching (ETEWBS) and same-destination-intermediate waveband switching (SD-IT-WBS) are analyzed and compared in terms of blocking probability and cost savings. First, an analytical model for ETEWBS is proposed to determine the network blocking probability in a mesh network. For SD-IT-WBS, a simple waveband switching algorithm is presented. An analytical model to determine the network blocking probability is proposed for SD-IT-WBS based on the algorithm. The analytical results are validated by comparing with simulation results. Both results match well and show that ETE-WBS slightly outperforms …

Go to article

A Novel Cost-Efficient On-Line Intermediate Waveband-Switching Scheme In Wdm Mesh Networks, Mengke Li, Wang Yao, Byrav Ramamurthy Jan 2005

A Novel Cost-Efficient On-Line Intermediate Waveband-Switching Scheme In Wdm Mesh Networks, Mengke Li, Wang Yao, Byrav Ramamurthy

School of Computing: Conference and Workshop Papers

Waveband switching (WBS) is an important technique to save switching and transmission cost in wavelength -division multiplexed (WDM) optical networks. A cost-efficient WBS scheme would enable network carriers to increase the network throughput (revenue) while achieving significant cost savings. We identify the critical factors that determine the WBS network throughput and switching cost and propose a novel intermediate waveband switching (IT-WBS) algorithm, called the minimizing-weighted-cost (MWC) algorithm. The MWC algorithm defines a cost for each candidate route of a call. By selecting the route with the smallest weighted cost, MWC balances between minimizing the call blocking probability and minimizing the …

Go to article

Discontinuous Waveband Switching In Wdm Optical Networks, Bhavana Lekkala, Byrav Ramamurthy Jan 2005

Discontinuous Waveband Switching In Wdm Optical Networks, Bhavana Lekkala, Byrav Ramamurthy

School of Computing: Conference and Workshop Papers

Routing techniques used in wavelength routed optical networks (WRN) do not give an efficient solution with Waveband routed optical networks (WBN) as the objective of routing in WRN is to reduce the blocking probability and that in WBN is to reduce the number of switching ports. Routing in WBN can be divided two parts, finding the route and grouping the wavelength assigned into that route with some existing wavelengths/wavebands. In this paper, we propose a heuristic for waveband routing, which uses a new grouping strategy called discontinuous waveband grouping to group the wavelengths into a waveband. The main objective of …

Go to article

Performance Analysis Of Sparse Traffic Grooming In Wdm Mesh Networks, Wang Yao, Mengke Li, Byrav Ramamurthy Jan 2005

Performance Analysis Of Sparse Traffic Grooming In Wdm Mesh Networks, Wang Yao, Mengke Li, Byrav Ramamurthy

School of Computing: Conference and Workshop Papers

Sparse traffic grooming is a practical problem to be addressed in heterogeneous multi-vendor optical WDM networks where only some of the optical cross-connects (OXCs) have grooming capabilities. Such a network is called as a sparse grooming network. The sparse grooming problem under dynamic traffic in optical WDM mesh networks is a relatively unexplored problem. In this work, we propose the maximize-lightpath-sharing multi-hop (MLS-MH) grooming algorithm to support dynamic traffic grooming in sparse grooming networks. We also present an analytical model to evaluate the blocking performance of the MLS-MH algorithm. Simulation results show that MLSMH outperforms an existing grooming algorithm, the …

Go to article

An Empirical Study Of Fault Localization For End-User Programmers, Joseph R. Ruthruff, Margaret Burnett, Gregg Rothermel Jan 2005

An Empirical Study Of Fault Localization For End-User Programmers, Joseph R. Ruthruff, Margaret Burnett, Gregg Rothermel

School of Computing: Conference and Workshop Papers

End users develop more software than any other group of programmers, using software authoring devices such as e-mail filtering editors, by-demonstration macro builders, and spreadsheet environments. Despite this, there has been little research on finding ways to help these programmers with the dependability of their software. We have been addressing this problem in several ways, one of which includes supporting end-user debugging activities through fault localization techniques. This paper presents the results of an empirical study conducted in an end-user programming environment to examine the impact of two separate factors in fault localization techniques that affect technique effectiveness. Our results …

Go to article

Technical Reports (1999 - 2005) Jan 2005

Technical Reports (1999 - 2005)

School of Computing: Technical Reports

Authors of Technical Reports (1999-2005):
Choueiry, Berthe
Elbaum, Sebastian
Goddard, Steve
Henninger, Scott
Jiang, Hong
Rothermel, Gregg
Scott, Stephen
Seth, Sharad
Soh, Leen-Kiat
Variyam, Vinodchandran

Go to article

Balancing Exploration And Exploitation: A New Algorithm For Active Machine Learning, Thomas Osugi, Deng Kun, Stephen Scott Jan 2005

Balancing Exploration And Exploitation: A New Algorithm For Active Machine Learning, Thomas Osugi, Deng Kun, Stephen Scott

School of Computing: Conference and Workshop Papers

Active machine learning algorithms are used when large numbers of unlabeled examples are available and getting labels for them is costly (e.g. requiring consulting a human expert). Many conventional active learning algorithms focus on refining the decision boundary, at the expense of exploring new regions that the current hypothesis misclassifies. We propose a new active learning algorithm that balances such exploration with refining of the decision boundary by dynamically adjusting the probability to explore at each step. Our experimental results demonstrate improved performance on data sets that require extensive exploration while remaining competitive on data sets that do not. Our …

Go to article

In Memoriam: John Platt Bradbury (1936–2005), Walter Dean, Sherilyn C. Fritz, Cathy Whitlock, William Watts Jan 2005

In Memoriam: John Platt Bradbury (1936–2005), Walter Dean, Sherilyn C. Fritz, Cathy Whitlock, William Watts

Department of Earth and Atmospheric Sciences: Faculty Publications

John Platt Bradbury, a former United States Geological Survey (USGS) geologist, and a long time and much valued editorial board member for the Journal of Paleolimnology, died of cancer (abdominal mesothelioma) on August 15, 2005, in the log home that he and his wife Vera Markgraf built in the mountains near Monte Vista, Colorado. Platt’s interest in paleolimnology developed during his graduate school years at the University of New Mexico, working with Roger Anderson and Walt Dean. He received his Ph.D. in 1967. He went on to do post-doctoral research at Yale University under G. Evelyn Hutchinson and then …

Go to article

First Prev Next Last