Digital Commons Network^™

Exploiting Geographical And Temporal Locality To Boost Search Efficiency In Peer-To-Peer Systems, Hailong Cai, Jun Wang

School of Computing: Faculty Publications

As a hot research topic, many search algorithms have been presented and studied for unstructured peer-to-peer (P2P) systems during the past few years. Unfortunately, current approaches either cannot yield good lookup performance, or incur high search cost and system maintenance overhead. The poor search efficiency of these approaches may seriously limit the scalability of current unstructured P2P systems. In this paper, we propose to exploit two-dimensional locality to improve P2P system search efficiency. We present a locality-aware P2P system architecture called Foreseer, which explicitly exploits geographical locality and temporal locality by constructing a neighbor overlay and a friend overlay, respectively. …

Structures And Relative Stability Of Neutral Gold Clusters: AuN (N=15–19), Satya S. Bulusu, Xiao Cheng Zeng

Xiao Cheng Zeng Publications

We performed a global-minimum search for low-lying neutral clusters (Au_n) in the size range of n=15–19 by means of basin-hopping method coupled with density functional theory calculation. Leading candidates for the lowest-energy clusters are identified, including four for Au₁₅, two for Au₁₆, three for Au₁₇, five for Au₁₈, and one for Au₁₉. For Au₁₅ and Au₁₆ we find that the shell-like flat-cage structures dominate the population of low-lying clusters, while for Au₁₇ and Au₁₈ spherical-like hollow-cage structures dominate the low-lying population. The transition …

Homogeneous Nucleation At High Supersaturation And Heterogeneous Nucleation On Microscopic Wettable Particles: A Hybrid Thermodynamic/Density-Functional Theory, T. V. Bykov, Xiao Cheng Zeng

Xiao Cheng Zeng Publications

Homogeneous nucleation at high supersaturation of vapor and heterogeneous nucleation on microscopic wettable particles are studied on the basis of Lennard-Jones model system. A hybrid classical thermodynamics and density-functional theory (DFT) approach is undertaken to treat the nucleation problems. Local-density approximation and weighted-density approximation are employed within the framework of DFT. Special attention is given to the disjoining pressure of small liquid droplets, which is dependent on the thickness of wetting film and radius of the wettable particle. Different contributions to the disjoining pressure are examined using both analytical estimations and numerical DFT calculation. It is shown that van der …

Non-Critical Waveguide Alignment For Vertically-Coupled Microring Using A Mode-Expanded Bus Architecture, Chyng Wen Tee, K. A. Williams, R. V. Penty, I. H. White

Research Collection Lee Kong Chian School Of Business

Vertically coupled microrings in an all-pass filter configuration are fabricated with a range of waveguide misalignments deliberately introduced into the lithography masks to demonstrate noncritical fabrication requirements. The microrings have a mode-expanded bus design which allows a greatly reduced variation in power coupling coefficient-only 6% for fabrication misalignments as high as 1 mum. This represents a five-fold improvement in fabrication tolerance when compared with conventional designs.

Fact Sheet - Sacred Heart University - Fall 2006, Office Of Institutional Research

News, Magazines and Reports

No abstract provided.

Did Nepa Drown New Orleans? The Levees, The Blame Game, And The Hazards Of Hindsight, Douglas A. Kysar, Thomas O. Mcgarity

Duke Law Journal

This Article highlights the. hazards of hindsight analysis of the causes of catastrophic events, focusing on theories of why the New Orleans levees failed during Hurricane Katrina in 2005 and particularly on the theory that the levee failures were "caused" by a 1977 National Environmental Policy Act (NEPA) lawsuit that resulted in a temporary injunction against the Army Corps of Engineers' hurricane protection project for New Orleans. The Article provides a detailed historical reconstruction of the decision process that eventuated in the New Orleans storm surge protection system, focusing both on the political and legal factors involved and on the …

The Virtue Of Vagueness: A Defense Of South Dakota V. Dole, Reeve T. Bull

Duke Law Journal

No abstract provided.

Service Pattern Discovery Of Web Service Mining In Web Service Registry-Repository, Qianhui Althea Liang, Jen-Yao Chung, Steven M. Miller, Yang Ouyang

Research Collection School Of Computing and Information Systems

This paper presents and elaborates the concept of Web service usage patterns and pattern discovery through service mining. We define three different levels of service usage data: i) user request level, ii) template level and iii) instance level. At each level, we investigate patterns of service usage data and the discovery of these patterns. An algorithm for service pattern discovery at the template level is presented. We show the system architecture of a service-mining enabled service registry repository. Web service patterns, pattern discovery and pattern mining supports the discovery and composition of complex services, which in turn supports the application …

Two-Instant Reallocation In Two-Echelon Spare Parts Inventory Systems, Huawei Song, Hoong Chuin Lau

Research Collection School Of Computing and Information Systems

In this paper, we study the problem of deciding when and how to perform reallocation of existing spare parts in a multi-echelon reparable item inventory system. We present a mathematical model that solves the problem when there are two reallocation instants, in response to the open challenge post by Cao and Silver(2005) to consider two or more possible reallocations within a replenishment cycle.

Cluster Observations Of Reconnection Due To The Kelvin-Helmholtz Instability At The Dawnside Magnetospheric Flank, K. Nykyri, A. Otto, B. Lavraud, C. Mouikis, L. M. Kistler, A. Balogh, H. Rème

Publications

On 3 July 2001, the four Cluster satellites traversed along the dawnside magnetospheric flank and observed large variations in all plasma parameters. The estimated magnetopause boundary normals were oscillating in the z-direction and the normal component of the magnetic field showed systematic ~2–3 min bipolar variations for 1 h when the IMF had a small positive bz-component and a Parker-spiral orientation in the x, y-plane. Brief ~33 s intervals with excellent deHoffman Teller frames were observed satisfying the Wal´en relation. Detailed comparisons with 2- D MHD simulations indicate that Cluster encountered rotational discontinuities generated by Kelvin-Helmholtz instability. We estimate a …

Ac Impedance Measurement By Line-To-Line Injected Current, Keith Corzine, Jing Huang

Electrical and Computer Engineering Faculty Research & Creative Works

Naval ship as well as aerospace power systems are incorporating a greater degree of power electronic switching sources and loads. Although these components provide exceptional performance, they are prone to instability due to their high efficiency and constant power characteristics which lead to a negative impedance nature. When designing these systems, system integrators must consider the impedance versus frequency at an interface (which designates source and load). Stability criteria have been developed in terms of source and load impedance for both DC and AC systems and it is often helpful to have techniques for impedance measurement. For DC systems, the …

Lsuhsc Facilities Biweekly Update: October 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2006

LSUHSC Facilities Biweekly Updates from October 17 and 27, 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Lsuhsc Facilities Daily Update: October 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2006

LSUHSC Dailly Facilities Updates from October 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Changing Course: Katrina, Lsuhsc-No Library, And New Orleans, Jennifer K. Lloyd Mlis, Ahip

LSUHSC Hurricane Katrina Archive: Reports & Presentations

"Changing Course: Katrina, LSUHSC-NO Library, and New Orleans" is a PowerPoint presentation of 35 slides created and presented by Jennifer K. Lloyd (LSU Health - New Orleans librarian 1995-Present) to the South Central Chapter of the Medical Librarian Association Annual Conference held October 20-24, 2006 in College Station, TX.

This presentation includes timelines, staffing details and locations, and collection inventories relating to the closure, relocation, and reopening of the libraries serving LSU Health Sciences Center's two campuses that were impacted by Hurricane Katrina.

Audio Similarity Measure By Graph Modeling And Matching, Yuxin Peng, Chong-Wah Ngo, Cuihua Fang, Xiaoou Chen, Jianguo Xiao

Research Collection School Of Computing and Information Systems

This paper proposes a new approach for the similarity measure and ranking of audio clips by graph modeling and matching. Instead of using frame-based or salient-based features to measure the acoustical similarity of audio clips, segment-based similarity is proposed. The novelty of our approach lies in two aspects: segment-based representation, and the similarity measure and ranking based on four kinds of similarity factors. In segmentbased representation, segments not only capture the change property of audio clip, but also keep and present the change relation and temporal order of audio features. In the similarity measure and ranking, four kinds of similarity …

Natural Document Clustering By Clique Percolation In Random Graphs, Wei Gao, Kam-Fai Wong

Research Collection School Of Computing and Information Systems

Document clustering techniques mostly depend on models that impose explicit and/or implicit priori assumptions as to the number, size, disjunction characteristics of clusters, and/or the probability distribution of clustered data. As a result, the clustering effects tend to be unnatural and stray away more or less from the intrinsic grouping nature among the documents in a corpus. We propose a novel graph-theoretic technique called Clique Percolation Clustering (CPC). It models clustering as a process of enumerating adjacent maximal cliques in a random graph that unveils inherent structure of the underlying data, in which we unleash the commonly practiced constraints in …

Extracting Link Chains Of Relationship Instances From A Website, Myo-Myo Naing, Ee Peng Lim, Roger Hsiang-Li Chiang

Research Collection School Of Computing and Information Systems

Web pages from a Web site can often be associated with concepts in an ontology, and pairs of Web pages also can be associated with relationships between concepts. With such associations, the Web site can be searched, browsed, or even reorganized based on the concept and relationship labels of its Web pages. In this article, we study the link chain extraction problem that is critical to the extraction of Web pages that are related. A link chain is an ordered list of anchor elements linking two Web pages related by some semantic relationship. We propose a link chain extraction method …

Privacy Enhanced Superdistribution Of Layered Content With Trusted Access Control, Daniel J. T. Chong, Robert H. Deng

Research Collection School Of Computing and Information Systems

Traditional superdistribution approaches do not address consumer privacy issues and also do not reliably prevent the malicious consumer from indiscriminately copying and redistributing the decryption keys or the decrypted content. The layered nature of common digital content can also be exploited to efficiently provide the consumer with choices over the quality of the content, allowing him/her to pay less for lower quality consumption and vice versa. This paper presents a system that superdistributes encrypted layered content and (1) allows the consumer to select a quality level at which to decrypt and consume the content; (2) prevents the merchant from knowing …

Viz: A Visual Analysis Suite For Explaining Local Search Behavior, Steven Halim, Roland H. C. Yap, Hoong Chuin Lau

Research Collection School Of Computing and Information Systems

NP-hard combinatorial optimization problems are common in real life. Due to their intractability, local search algorithms are often used to solve such problems. Since these algorithms are heuristic-based, it is hard to understand how to improve or tune them. We propose an interactive visualization tool, VIZ, meant for understanding the behavior of local search. VIZ uses animation of abstract search trajectories with other visualizations which are also animated in a VCR-like fashion to graphically playback the algorithm behavior. It combines generic visualizations applicable on arbitrary algorithms with algorithm and problem specific visualizations. We use a variety of techniques such as …

Reverse Decision Making And Goal Attainment A Proof Of Concept As A New Approach To The Decision Making Process Under Uncertainty, Shitalkumar S. Sabne

Engineering Management & Systems Engineering Theses & Dissertations

Decision making occurs when one must choose among alternatives. However, in uncertain environments where problems are complex and decision makers lack complete knowledge of the situation as well as decision alternatives, it's not possible for them to select an optimal decision outcome by 'Traditional Decision Approaches'. At present Reverse Decision Making is the central, although new and unproved, approach of Old Dominion University's Engineering Management and Systems Engineering research on decision making process for uncertain and complex situations. Even though research in decision making spans over one hundred years, there are still important problems which remain to be addressed.

There …

Vital Tooth Whitening: Effects On Tooth Color Satisfaction, Beliefs About Dentofacial Appearance, And Self-Esteem In Older Adults, Kelly Marie Seeber

Dental Hygiene Theses & Dissertations

The purpose of this study was to explore the effects of vital tooth whitening on tooth color satisfaction, beliefs about dentofacial appearance, and self-esteem in a population 50 years of age and older. A two-group, randomized, pre-test, post-test, single-blind design was utilized following !RB-approval. Sixty-two participants were enrolled. Fifty-three participants (N=53) completed the study with no adverse events reported. Both the control and experimental groups received instructions for a threeweek oral self-care regimen, a toothbrush, toothpaste, and floss. The experimental group also received a tooth whitening product (independent variable) to be used during the same three-week period. Dependent variable measures …

Exchange Hydrodynamics Between A Subestuary And Its Adjacent Estuary, Diego A. Narváez

OES Theses and Dissertations

Four oceanographic surveys and two periods of moored data were analyzed to describe the subtidal exchange hydrodynamics between a subestuary (Nansemond River) and its adjacent estuary (James River) in the lower Chesapeake Bay. The surveys were carried out during two semidiurnal periods (~25 hrs), which included two spring and two neap tides. Velocity profiles and hydrographic data were recorded over an area ~4 km long and ~1 km wide allowing a spatial resolution rarely obtained with observational data. The results obtained in the surveys were extended with instruments deployed at the entrance to the subestuary during winter and summer time …

Nutrition & Dietetics 2006 Apr Self-Study & Documents, University Of New Mexico

UNM Academic Program Review

UNM Nutrition & Dietetics APR self-study report, review team report, response to review report, and initial action plan for Fall 2006, fulfilling requirements of the Higher Learning Commission.

The Effects Of Ultrashort Pulsed Electric Fields On The Fluorescent Molecule Bodipy Fl C5 Ceramide, Rachael Sara Shevin

Electrical & Computer Engineering Theses & Dissertations

Nanosecond pulsed electric fields are able to manipulate internal cell organelles by taking advantage of the small but finite time required for charge to establish across a capacitive barrier. Pulsed electric fields also affect macromolecular structures such as enzymes and proteins. Application of a single nanosecond pulsed electric field decreases the fluorescence of a commercially available biological dye Bodipy FL C₅ Ceramide, used to observe the Golgi apparatus of living cells. The effect is seen when the fluorophore is exposed to an electric field both in vitro and when incorporated into the Golgi of a living Jurkat cell. Observation …

Confronting Conventional Thinking: The Heuristics Problem In Feminist Legal Theory, Nancy Levit

Cardozo Law Review

No abstract provided.

Cooperative Conservation: Increasing Capacity Through Community Partnerships - Interagency Volunteer Program: Quarterly Progress Report, Period Ending September 30, 2006, Margaret N. Rees

Get Outdoors Nevada

• Volunteer database increased 9.5% over last quarter. Database now contains 2,698 records.
• Website activity decreased, recording an average of 42,488 hits per month, with an average of 4,435 pages viewed per month (3.6% decrease in pages viewed).
• Volunteer recognition ceremony scheduled for November 4 at the Renaissance Hotel, Las Vegas.
• Fall 2006 volunteer training schedule finalized.
• National Public Lands Day volunteer projects successfully executed at Red Rock Canyon NCA and Lake Mead NRA, with a total of 232 community volunteers contributing more than 1,000 hours toward clean-up and restoration of Southern Nevada’s public lands.
• Team charter presented to the federal …

Interagency Science And Research: Quarterly Progress Report, Period Ending September 30, 2006, Margaret N. Rees

Interagency Science and Research Strategy

• Desert Research Institute completed two Mojave Desert Ecosystem Health Assessment (i.e., Vital Signs) workshops in August 2006. Public Lands Institute assisted in preparing the workshop opening presentation on behalf of the interagency team.
• Round 7 beta-test of the Phase I strategy delayed to the next quarter.

Lake Mead National Recreation Area Vegetation Monitoring And Management: Final Close-Out Report, Time Period: October 1, 2005 To September 30, 2006, Margaret N. Rees

Vegetation Monitoring

The National Park Service (NPS) at Lake Mead National Recreation Area (LAME) entered into a cooperative agreement with the University of Nevada, Las Vegas (UNLV) to accomplish vegetation monitoring and management activities. This report summarizes activities that took place by UNLV under this task agreement between October 1, 2005, and September 30, 2006. The activities included:

• Weed Sentry mapping and treating incipient populations of exotic invasive plants throughout Clark County, including along shorelines of Lakes Mead and Mohave;
• Monitoring of targeted rare native plant species;
• Sahara mustard research; and
• Providing technical assistance upon request to the NPS vegetation manager.

In …

Lake Mead National Recreation Area National Park Service: Final Progress Report, Period Ending September 30, 2006, Margaret N. Rees

Wildlife Monitoring

This task agreement was awarded by the National Park Service (NPS), Lake Mead National Recreation Area (LAME), to the Public Lands Institute (PLI) at the University of Nevada, Las Vegas (UNLV) on October 1, 2005. This monitoring, research, and management project consisted of several project elements focused on: bald eagles, peregrine falcons, rare songbird species (including southwest willow flycatcher); aquatic birds, relict leopard frog, desert tortoise, and bighorn sheep. In general, actions associated with this project focused on the development and implementation of inventory and monitoring programs to determine the distribution, status, abundance, trends, and potential threats to these animals, …

Take Pride In America In Southern Nevada: Quarterly Progress Report, Period Ending September 30, 2006, Margaret N. Rees

Anti-littering Programs

• Team members have been meeting regularly with other interagency teams to plan for the upcoming messaging campaign roll-out event, set for October 12, 2006.

• The Interagency Anti-Litter Team recycled over a ton of paper this quarter.

• A task order modification request was completed, submitted, and approved this quarter. The request will make more funds available for the messaging campaign.

• A multi-pronged media buy for the messaging campaign has been planned this quarter and will be initiated in October.

• The Anti-Litter Team worked with the Nevada Division of Forestry to complete Phase Two of a clean-up …