Digital Commons Network^™

Smooth Flexible Models Of Nonhomogeneous Poisson Processes Fit To One Or More Process Realizations, Shalaka C. Deo

Theses

Simulation is a technique of creating representations or models of real world systems or processes and conducting experiments to predict behavior of actual systems. Input modeling is a critical aspect of simulation modeling. Stochastic input models are used to model various aspects of the system under uncertainty including process times and interarrival times. This research focuses on input models for nonstationary arrival processes that can be represented as nonhomogeneous Poisson processes (NHPPs). In particular, a smooth flexible model for the mean-value function (or integrated rate function) of a general NHPP is estimated. To represent the mean-value function, the method utilizes …

Mining Communities In Networks: A Solution For Consistency And Its Evaluation, Haewoon Kwak, Yoonchan Choi, Young-Ho Eom, Hawoong Jeong, Sue Moon

Research Collection School Of Computing and Information Systems

Online social networks pose significant challenges to computer scientists, physicists, and sociologists alike, for their massive size, fast evolution, and uncharted potential for social computing. One particular problem that has interested us is community identification. Many algorithms based on various metrics have been proposed for communities in networks [18, 24], but a few algorithms scale to very large networks. Three recent community identification algorithms, namely CNM [16], Wakita [59], and Louvain [10], stand out for their scalability to a few millions of nodes. All of them use modularity as the metric of optimization. However, all three algorithms produce inconsistent communities …

Online Fault Detection Of Induction Motors Using Independent Component Analysis And Fuzzy Neural Network, Zhaoxia Wang, C. S. Chang, X. German, W.W. Tan

Research Collection School Of Computing and Information Systems

This paper proposes the use of independent component analysis and fuzzy neural network for online fault detection of induction motors. The most dominating components of the stator currents measured from laboratory motors are directly identified by an improved method of independent component analysis, which are then used to obtain signatures of the stator current with different faults. The signatures are used to train a fuzzy neural network for detecting induction-motor problems such as broken rotor bars and bearing fault. Using signals collected from laboratory motors, the robustness of the proposed method for online fault detection is demonstrated for various motor …

Mining Hierarchical Scenario-Based Specifications, David Lo, Shahar Maoz

Research Collection School Of Computing and Information Systems

Scalability over long traces, as well as comprehensibility and expressivity of results, are major challenges for dynamic analysis approaches to specification mining. In this work we present a novel use of object hierarchies over traces of inter-object method calls, as an abstraction/refinement mechanism that enables user-guided, top-down or bottom-up mining of layered scenario-based specifications, broken down by hierarchies embedded in the system under investigation. We do this using data mining methods that provide statistically significant sound and complete results modulo user-defined thresholds, in the context of Damm and Harel’s live sequence charts (LSC); a visual, modal, scenario-based, inter-object language. Thus, …

Trust Relationship Prediction Using Online Product Review Data, Nan Ma, Ee Peng Lim, Viet-An Nguyen, Aixin Sun

Research Collection School Of Computing and Information Systems

Trust between users is an important piece of knowledge that can be exploited in search and recommendation.Given that user-supplied trust relationships are usually very sparse, we study the prediction of trust relationships using user interaction features in an online user generated review application context. We show that trust relationship prediction can achieve better accuracy when one adopts personalized and cluster-based classification methods. The former trains one classifier for each user using user-specific training data. The cluster-based method first constructs user clusters before training one classifier for each user cluster. Our proposed methods have been evaluated in a series of experiments …

Trust-Oriented Composite Services Selection And Discovery, Lei Li, Yan Wang, Ee Peng Lim

Research Collection School Of Computing and Information Systems

In Service-Oriented Computing (SOC) environments, service clients interact with service providers for consuming services. From the viewpoint of service clients, the trust level of a service or a service provider is a critical issue to consider in service selection and discovery, particularly when a client is looking for a service from a large set of services or service providers. However, a service may invoke other services offered by different providers forming composite services. The complex invocations in composite services greatly increase the complexity of trust-oriented service selection and discovery. In this paper, we propose novel approaches for composite service representation, …

Minimum Latency Broadcasting In Multiradio, Multichannel, Multirate Wireless Meshes, Junaid Qadir, Chuntung Chou, Archan Misra, Joo Ghee Lim

Research Collection School Of Computing and Information Systems

We address the problem of minimizing the worst-case broadcast delay in multi-radio multi-channel multi-rate (MR2-MC) wireless mesh networks (WMN). The problem of 'efficient' broadcast in such networks is especially challenging due to the numerous interrelated decisions that have to be made. The multi-rate transmission capability of WMN nodes, interference between wireless transmissions, and the hardness of optimal channel assignment adds complexity to our considered problem. We present four heuristic algorithms to solve the minimum latency broadcast problem for such settings and show that the 'best' performing algorithms usually adapt themselves to the available radio interfaces and channels. We also study …

Lsuhsc Facilities Daily Update: November 2009, Lsuhsc Property And Facilities Management

LSUHSC Facilities Daily Updates: 2009

LSUHSC Dailly Facilities Updates from November 2009. 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 Biweekly Update: November 2009, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2009

LSUHSC Facilities Biweekly Updates from November 6 and 20, 2009.

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.

Active Disturbance Rejection Control For Mems Gyroscopes, Qing Zheng, Lili Dong, Dae Hui Lee, Zhiqiang Gao

Electrical and Computer Engineering Faculty Publications

A new control method is presented to drive the drive axis of a Micro-Electro-Mechanical Systems (MEMS) gyroscope to resonance and to regulate the output amplitude of the axis to a fixed level. It is based on a unique active disturbance rejection control (ADRC) strategy, which actively estimates and compensates for internal dynamic changes of the drive axis and external disturbances in real time. The stability analysis shows that both the estimation error and the tracking error of the drive axis output are bounded and that the upper bounds of the errors monotonously decrease with the increase of the controller bandwidth. …

Energy Efficient Rgbw Pixel Configuration For Light-Emitting Displays, Neveen Shlayan, Rama Venkat, Paolo Ginobbi, Ashok K. Singh

Electrical & Computer Engineering Faculty Research

A study on LED displays has been conducted exploring a more efficient method for color generation than the traditional method. The study is comprehensive and thoroughly performed employing various sets of experiments in order to examine the functionality of the new proposed scheme which includes a literature review, theoretical modeling based on a scientific study, experimental data measurements of a developed prototype, and statistical data based on a survey. This study resulted in very interesting outcomes that may lead to a tremendous change in the existing LED display technology.

Patening The Curve Ball: Business Methods And Industry Norms, Gerard N. Magliocca

BYU Law Review

No abstract provided.

The Knowledge Problem Of New Paternalism, Mario J. Rizzo, Douglas Glen Whitman

BYU Law Review

No abstract provided.

Using Socio-Economics And Binary Economics To Serve The Interests Of Poor And Working People: What Critical Scholars Can Do To Help, Robert Ashford

Seattle Journal for Social Justice

No abstract provided.

A Critique Of In Re Bilski, Maayan Filmar

DePaul Journal of Art, Technology & Intellectual Property Law

No abstract provided.

Sensor Integration For Low-Cost Crash Avoidance, Stephane M. Roussel

Master's Theses

This report is a summary of the development of sensor integration for low-cost crash avoidance for over-land commercial trucks. The goal of the project was to build and test a system composed of low-cost commercially available sensors arranged on a truck trailer to monitor the environment around the truck. The system combines the data from each sensor to increase the reliability of the sensor using a probabilistic data fusion approach. A combination of ultrasonic and magnetoresistive sensors was used in this study. In addition, Radar and digital imaging were investigated as reference signals and possible candidates for additional sensor integration. …

Traffic Signal Control With Ant Colony Optimization, David T. Renfrew

Master's Theses

Traffic signal control is an effective way to improve the efficiency of traffic networks and reduce users’ delays. Ant Colony Optimization (ACO) is a metaheuristic based on the behavior of ant colonies searching for food. ACO has successfully been used to solve many NP-hard combinatorial optimization problems and its stochastic and decentralized nature fits well with traffic flow networks. This thesis investigates the application of ACO to minimize user delay at traffic intersections. Computer simulation results show that this new approach outperforms conventional fully actuated control under the condition of high traffic demand.

The Next Generation Router System Cooling Design, Garrett A. Glover

Master's Theses

Advancements in the networking and routing industry have created higher power electronic systems which dissipate large amounts of heat while cooling technology for these electronic systems has remained relatively unchanged. This report illustrates the development and testing of a hybrid liquid-air cooling system prototype implemented on Cisco’s 7609s router. Water was the working fluid through cold plates removing heat from line card components. The water was cooled by a compact liquid-air heat exchanger and circulated by two pumps. The testing results show that junction temperatures were maintained well below the 105°C limit for ambient conditions around 30°C at sea level. …

Digital Circuit Wear-Out Due To Electromigration In Semiconductor Metal Lines, Gregory Ross Wilkinson

Master's Theses

With the constant scaling of semiconductor devices, reliability of these devices is a huge concern. One of the biggest reliability issues is a phenomenon known as electromigration (EM) [1] [2]. Electromigration is the transport of material caused by the gradual movement of the ions in a conductor due to the momentum transfer between conducting electrons and diffusing metal atoms [27]. The damage induced by electromigration appears as the formation of voids and hillocks, resulting in electrical discontinuity.

Based on previous Electromigration research [15], I have created a tool chain that identifies where electromigration is likely to occur in large-scale integrated …

Influence Of Crop Load On Fruit Composition Using Pinot Noir Grapes, Patrick G. Phelan

Master's Theses

ABSTRACT

Influence of Crop Load on Fruit Composition Using Pinot Noir Grapes

Patrick G. Phelan

November 2009

The two seasons for this trial were conducted in 2002 and 2003 at Bien Nacido Vineyard in Santa Maria, California. The trial consisted of pinot noir wine grapes clone 2a, grown on 101-14 rootstock. There were eight treatments with a control consisting of 25 vines per treatment, and 50 vines for the control.

The primary objective of this research experiment was to conduct different vine balance procedures and compare them to the amount of wine phenolics. The vines were altered with two procedures. …

Assessing The Merits Of The Ctbt, David W. Hafemeister

Physics

The Treaty on the Non-Proliferation of Nuclear Weapons and the nonproliferation regime have been weakened; perhaps no other issue demonstrates this as dramatically as the status of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), the ratification of which the U.S. Senate rejected in October 1999. Despite the U.S. rejection, the test ban has strong international support—the most recent vote to promote the CTBT in the UN General Assembly passed overwhelmingly, with 175 votes to 1 (the United States) and three abstentions. The Obama administration favors U.S. ratification of the CTBT, but this is no guarantee that Washington will ratify the test ban. …

Why It Managers Don't Go For Cyber-Insurance Products, Tridib Bandyopadhyay, Vijay S. Mookerjee, Ram C. Rao

Faculty Articles

Despite positive expectations, cyber-insurance products have failed to take center stage in the management of IT security risk. Market inexperience, leading to conservatism in pricing cyber-insurance instruments, is often cited as the primary reason for the limited growth of the cyber-insurance market. In contrast, here we provide a demand-side explanation for why cyber-insurance products have not lived up to their initial expectations. We highlight the presence of information asymmetry between customers and providers, showing how it leads to overpricing cyber-insurance contracts and helps explain why cyber insurance might have failed to deliver its promise as a cornerstone of IT security-management …

The Assessment Cyberguide For Learning Goals And Outcomes, Thomas Pusateri, Jane S. Halonen, Bill Hill, Maureen Mccarthy

Faculty Articles

The CyberGuide serves as a companion resource for implementing the APA Guidelines for the Undergraduate Major in Psychology. These resources should aid psychology departments and their faculty to design the most appropriate and effective assessment plans. We have organized this Cyberguide into four parts that will assist departments in developing assessment plans: I. Understanding Assessment: Departmental, Institutional, Educational, and Societal Perspectives II. Designing Viable Assessment Plans III. Sustaining an Assessment Culture IV. Applying Assessment Strategies in Psychology

Computational Thinking...And Doing, George K. Thiruvathukal

Computer Science: Faculty Publications and Other Works

Computing in Science and Engineering, From the Editors

Essential Tools: Version Control Systems, Konrad Hinsen, Konstantin Läufer, George K. Thiruvathukal

Computer Science: Faculty Publications and Other Works

Did you ever wish you'd made a backup copy of a file before changing it? Or before applying a collaborator's modifications? Version control systems make this easier, and do a lot more.

Energy Sector Pricing And Macroeconomic Dynamics: Editorial Introduction Of The Special Issue, Anastasios G. Malliaris, C. Kyrtsou

School of Business: Faculty Publications and Other Works

No abstract provided.

Validity Of The Spin-Susceptibility “Glue” Approximation For Pairing In The Two-Dimensional Hubbard Model, Ehsan Khatami, A. Macridin, M. Jarrell

Faculty Publications

We examine the validity of the weak-coupling spin-susceptibility “glue” approximation (SSGA) in a two-dimensional Hubbard model for cuprates. For comparison, we employ the well-established dynamical cluster approximation (DCA) with a quantum Monte Carlo algorithm as a cluster solver. We compare the leading eigenvalues and corresponding eigenfunctions of the DCA and SSGA pairing matrices. For realistic model parameters, we find that the SSGA fails to capture the leading pairing symmetries seen in the DCA. Furthermore, when the SSGA is improved through the addition of a term with d-wave symmetry, the strength of this additional term is found to be larger than …

Environmental Risks Monitoring Of Shipwrecks In Italian Seas, Giuseppe Masetti, Fulvia Orsini

Center for Coastal and Ocean Mapping

After a description of the international regulatory framework, this paper examines the European project DE.E.P.P. and provides an overview of shipwreck databases in Italy. Afterwards, it reconstructs the recent history of the supertanker VLCC Haven which represents one of the largest Mediterranean shipwrecks. The findings of this paper emphasize the need to unify all the various agencies databases into a national Territorial Information System of potentially polluting wrecks. This System would be completed by all the information available in archives and press, to allow an adequate environmental risk monitoring and classification of shipwrecks in the Italian seas.

Galaxy Zoo Green Peas: Discovery Of A Class Of Compact Extremely Star-Forming Galaxies, Carolin Cardamone, Kevin Schawinski, Marc Sarzi, Steven P. Bamford, Vardha N. Bennert, C. M. Urry, Chris Lintott, William C. Keel, John Parejko, Robert C. Nichol, Daniel Thomas, Dan Andreescu, Phil Murray, M. Jordan Raddick, Anže Slosar, Alex Szalay, Jan Vandenberg

Physics

We investigate a class of rapidly growing emission line galaxies, known as ‘Green Peas’, first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small size, unresolved in Sloan Digital Sky Survey imaging. Their appearance is due to very strong optical emission lines, namely [O iii]λ5007 Å, with an unusually large equivalent width of up to ∼1000 Å. We discuss a well-defined sample of 251 colour-selected objects, most of which are strongly star forming, although there are some active galactic nuclei interlopers including eight newly discovered narrow-line Seyfert 1 galaxies. The star-forming Peas …

Fungal Entomopathogens: New Insights On Their Ecology, Fernando E. Vega, Mark S. Goettel, Meredith Blackwell, David Chandler, Mark A. Jackson, Siegfried Keller, Masanori Koike, Nguya K. Maniania, Arnulfo Monzón, Bonnie H. Ownley, Judith K. Pell, Drauzio E.N. Rangel, Helen E. Roy

All Peer-Reviewed Publications

An important mechanism for insect pest control should be the use of fungal entomopathogens. Even though these organisms have been studied for more than 100 y, their effective use in the field remains elusive. Recently, however, it has been discovered that many of these entomopathogenic fungi play additional roles in nature. They are endophytes, antagonists of plant pathogens, associates with the rhizosphere, and possibly even plant growth promoting agents. These findings indicate that the ecological role of these fungi in the environment is not fully understood and limits our ability to employ them successfully for pest management. In this paper, …