Digital Commons Network^™

Power System Control With An Embedded Neural Network In Hybrid System Modeling, Seung-Mook Baek, Jung-Wook Park, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Output limits of the power system stabilizer (PSS) can improve the system damping performance immediately following a large disturbance. Due to nonsmooth nonlinearities arising from the saturation limits, these values cannot be determined by the conventional tuning methods based on linear analysis. Only ad hoc tuning procedures can been used. A feedforward neural network (with a structure of multilayer perceptron neural network) is applied to identify the dynamics of an objective function formed by the states and, thereafter, to compute the gradients required in the nonlinear parameter optimization. Moreover, its derivative information is used to replace that obtained from the …

Discrete-Time Ripple Correlation Control For Maximum Power Point Tracking, Jonathan W. Kimball, Philip T. Krein

Electrical and Computer Engineering Faculty Research & Creative Works

Ripple correlation control (RCC) is a high-performance real-time optimization technique that has been applied to photovoltaic maximum power point tracking. This paper extends the previous analog technique to the digital domain. The proposed digital implementation is less expensive, more flexible, and more robust. with a few simplifications, the RCC method is reduced to a sampling problem; that is, if the appropriate variables are sampled at the correct times, the discrete-time RCC (DRCC) algorithm can quickly find the optimal operating point. First, the general DRCC method is derived and stability is proven. Then, DRCC is applied to the photovoltaic maximum power …

Economic Load Dispatch Using Bacterial Foraging Technique With Particle Swarm Optimization Biased Evolution, Ahmed Yousuf Saber, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents a novel modified bacterial foraging technique (BFT) to solve economic load dispatch (ELD) problems. BFT is already used for optimization problems, and performance of basic BFT for small problems with moderate dimension and searching space is satisfactory. Search space and complexity grow exponentially in scalable ELD problems, and the basic BFT is not suitable to solve the high dimensional ELD problems, as cells move randomly in basic BFT, and swarming is not sufficiently achieved by cell-to-cell attraction and repelling effects for ELD. However, chemotaxis, swimming, reproduction and elimination-dispersal steps of BFT are very promising. On the other …

Optimal Energy-Delay Routing Protocol With Trust Levels For Wireless Ad Hoc Networks, Eyad Taqieddin, Ann K. Miller, Jagannathan Sarangapani

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents the Trust Level Routing (TLR) pro- tocol, an extension of the optimized energy-delay rout- ing (OEDR) protocol, focusing on the integrity, reliability and survivability of the wireless network. TLR is similar to OEDR in that they both are link state routing proto- cols that run in a proactive mode and adopt the concept of multi-point relay (MPR) nodes. However, TLR aims at incorporating trust levels into routing by frequently changing the MPR nodes as well as authenticating the source node and contents of control packets. TLR calcu- lates the link costs based on a composite metric (delay …

Particle Swarm Optimization With Quantum Infusion For The Design Of Digital Filters, Bipul Luitel, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, particle swarm optimization with quantum infusion (PSO-QI) has been applied for the design of digital filters. In PSO-QI, Global best (gbest) particle (in PSO star topology) obtained from particle swarm optimization is enhanced by doing a tournament with an offspring produced by quantum behaved PSO, and selecting the winner as the new gbest. Filters are designed based on the best approximation to the ideal response by minimizing the maximum ripples in passband and stopband of the filter response. PSO-QI, as is shown in the paper, converges to a better fitness. This new algorithm is implemented in the …

Regional Dashboard Of Economic Indicators 2008: Comparative Performance Of Midwest And Northeast Ohio Metropolitan Areas, Ziona Austrian, Afia Yamoah, Iryna Lendel

All Maxine Goodman Levin School of Urban Affairs Publications

This report describes the findings from the third study of Dashboard indicators using the framework that was developed in the previous two studies. The framework resulted in a set of indicators that explains the dynamics of regional economic growth for large and mid-sized metropolitan areas in the United States. The objective of this study is to continue monitoring the performance of Northeast Ohio metropolitan areas over time and in comparison to other metropolitan areas across the United States.

Phylogenetic Reconstruction From Transpositions, Feng Yue, Meng Zhang, Jijun Tang

Faculty Publications

Background
Because of the advent of high-throughput sequencing and the consequent reduction in the cost of sequencing, many organisms have been completely sequenced and most of their genes identified. It thus has become possible to represent whole genomes as ordered lists of gene identifiers and to study the rearrangement of these entities through computational means. As a result, genome rearrangement data has attracted increasing attentions from both biologists and computer scientists as a new type of data for phylogenetic analysis. The main events of genome rearrangements include inversions, transpositions and transversions. To date, GRAPPA and MGR are the most accurate …

Evidence On The Role Of Supplier-Retailer Trading Relationships And Practices In Waste Generation In The Food Chain, Carlos Mena, Peter Whitehead

Business Faculty Publications and Presentations

This report presents the results of the project entitled “Evidence on the role of supplier-retailer trading relationships and practices in waste generation in the food chain” commission by Defra (Project Code SFFSD0705) and undertaken by Cranfield University and IGD between July 2008 and June 2009.

The overall aim of the project was to provide a qualitative analysis of the food and packaging waste arising from the link between food manufacturers and retailers in the UK. The specific objectives of the project were:

• To identify the root causes of waste between suppliers and retailers in the UK
• To assess the magnitude …

Ground-Penetrating Radar And Thermal Modeling Of Active Layer Thaw Beneath Arctic Streams, Troy Richard Brosten

Boise State University Theses and Dissertations

Seasonal thaw depth beneath arctic streams significantly impacts physical and biological processes within arctic stream environments. The impact of greater seasonal thaw for extended periods of time can alter ecosystems that have, in the past, resulted from more prevalent permafrost environments. Effects of climatic change on arctic stream environments necessitate the need for more information on characteristics of seasonal thaw and processes that occur within the thawed layer. Multiple ground-penetrating radar (GPR) methods and one-dimensional (1D) thermal modeling were used to investigate seasonal thaw beneath arctic streams and determine the dominant thermal process.

Study sites were selected to include stream …

University Reporter - Volume 13, Number 01 - September 2008

1996-2009, University Reporter

This issue of the University Reporter includes articles on campus redesign and building initiatives, the Genzyme/UMass Scholars Program, the Dorchester Beach Festival, an exhibit curated by UMass faculty on Shakespeare at the Boston Public Library, and the Iraq Project (and Project director Padraig O'Malley), a joint venture of the John W. McCormack Graduate School of Policy Studies (MGS), the Institute for Global Leadership (IGL) at Tufts University in Medford, Massachusetts, the Crisis Management Initiative (CMI), and other news from UMass Boston.

A Methodology For Assessing The Military Benefits Of Science And Technology Investments, Albert Sciarretta, Richard Chait, Joseph N. Mait, Jordan Willcox

Defense and Technology Papers

This paper discusses approaches developed at CTNSP, at the request of the Deputy Assistant Secretary of the Army for Research and Technology, for measuring the benefits of today’s science and technology (S&T) investments on the future military.

Statistical Modeling Of Radiometric Error Propagation In Support Of Hyperspectral Imaging Inversion And Optimized Ground Sensor Network Design, Scott Klempner

Theses

A method is presented that attempts to isolate the relative magnitudes of various error sources present in common algorithms for inverting the effects of atmospheric scattering and absorption on solar irradiance and determine in what ways, if any, operational ground truth measurement systems can be employed to reduce the overall error in retrieved reflectance factor. Error modeling and propagation methodology is developed for each link in the imaging chain, and representative values are determined for the purpose of exercising the model and observing the system behavior in response to a wide variety of inputs. Three distinct approaches to modelbased atmospheric …

Reflections On Domestic Work And The Feminization Of Migration, Glenda Labadie-Jackson

Campbell Law Review

This Article brings forth some general reflections on domestic work and the feminization of migration, with particular emphasis on the complex interrelation of immigration status, gender, class, and race that takes place in this context. In light of these reflections, the Article concludes by recommending the promulgation of additional national and international regulatory schemes designed to protect the human rights of domestic workers.

Enacting Social Justice To Teach Social Justice: The Pedagogy Of Bridge Builders, Karen E. Eifler, Jeff Kerssen-Griep, Peter Thacker

Journal of Catholic Education

This article describes a particular endeavor, the Bridge Builders Academic Mentoring Program (BAMP), a partnership between a school of education in a Catholic university in the Northwest and a community-based rites of passage program for adolescent African American males. The partnership exemplifies tenets of Catholic social teaching, in that it is community-based, justice-oriented and in many ways countercultural. The pedagogy aligns with the goals of service learning; that is, the service extended by university students satisfies a genuine community need, and at the same time affords those engaged in service an opportunity to acquire crucial knowledge, skills, and dispositions to …

Non-Canonical Binding Of Calmodulin To Aquaporin-0: Implications For Channel Regulation, Steve Reichow, Tamir Gonen

Chemistry Faculty Publications and Presentations

Aquaporins (AQPs) are a family of ubiquitous membrane channels that conduct water across cell membranes. AQPs form homo-tetramers containing four functional and independent water pores. Aquaporin-0 (AQP0) is expressed in the eye lens where its water permeability is regulated by calmodulin (CaM). Here we use a combination of biochemical methods and NMR spectroscopy to probe the interaction between AQP0 and CaM. We show CaM binds the AQP0 C-terminal domain in a calcium dependent manner. We demonstrate that only two CaM molecules bind a single AQP0 tetramer in a non-canonical fashion, suggesting a form of co-operativity between AQP0 monomers. Based on …

The Collegian (2008-09-01), Isis Lopez

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 61, No. 3

The Comparative Radiopacity Between Primary And Permanent Teeth, Robert C. Lee

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: This in vitro study compared the radiopacity between human primary and permanent enamel and dentin. It also compared the radiopacity between human anterior and posterior teeth.

Methods: Extracted primary and permanent teeth were used in this study. One mm enamel and one mm dentin slices were cut from each extracted tooth. Radiographs were taken of each enamel and dentin specimen 1 mm in thickness along with an aluminum step-wedge using procedures specified in International Standards Organization (ISO) 4049:2000. A densitometer was used to measure the Optical Density (OD) of the radiographs of the specimen and the accompanying aluminum step-wedge. …

A Hundred Year's War

Teacher journal archive (2004-2011)

Click on the DOWNLOAD button to access this article of Teacher.

Linear Dichroism In Resonant Inelastic X-Ray Scattering To Molecular Spin-Orbit States, Renaud Guillemin, Stephane Carniato, Wayne C. Stolte, Loic Journel, Richard Taieb, Dennis W. Lindle, Marc Simon

Chemistry and Biochemistry Faculty Research

Polarization-dependent resonant inelastic x-ray scattering (RIXS) is shown to be a new probe of molecular-field effects on the electronic structure of isolated molecules. A combined experimental and theoretical analysis explains the linear dichroism observed in Cl 2p RIXS following Cl 1s excitation in HCl and CF₃Cl as due to molecular-field effects, including singlet-triplet exchange, indicating polarized-RIXS provides a direct probe of spin-orbit-state populations applicable to any molecule.

Phase Transitions In Lafeaso: Structural, Magnetic, Elastic, And Transport Properties, Heat Capacity And Mössbauer Spectra, Michael A. Mcguire, Andrew D. Christianson, Athena S. Sefat, Brian C. Sales, Mark D. Lumsden, Rongying Jin, Edward Andrew Payzant, David G. Mandrus, Yanbing Luan, Veerle M. Keppens, Vijayalaksmi Varadarajan, Joseph W. Brill, Raphäel P. Hermann, M. T. Sougrati, Fernande Grandjean, Gary J. Long

Chemistry Faculty Research & Creative Works

We present results from a detailed experimental investigation of LaFeAsO, the parent material in the series of “FeAs” based oxypnictide superconductors. Upon cooling, this material undergoes a tetragonal-orthorhombic crystallographic phase transition at ~160 K followed closely by an antiferromagnetic ordering near 145 K. Analysis of these phase transitions using temperature dependent powder x-ray and neutron-diffraction measurements is presented. A magnetic moment of ~0.35µ_B per iron is derived from Mössbauer spectra in the low-temperature phase. Evidence of the structural transition is observed at temperatures well above the transition temperature (up to near 200 K) in the diffraction data as well …

Goblets Of Fire: Potential Constitutional Impediments To The Regulation Of Global Warming, Steven Ferrey

Suffolk University Law School Faculty Works

Almost half the U.S. states have begun to regulate the emission of greenhouse gases and global warming, given that the federal government has not acted. However, these leading states are implementing carbon regulatory measures that, if challenged, may be found to violate the Supremacy Clause and/or Commerce Clause of the U.S. Constitution. If so, these state initiatives, as the lead edge of U.S. policy on global warming, will require time-consuming legal revisions that could affect fundamental allowance allocation in lieu of auction, use of government garnered revenues from state carbon restrictions, and the degree to which states can change wholesale …

Optimal Remedies For Patent Infringement: A Transactional Model, Paul J. Heald

Coase-Sandor Institute for Law & Economics Research Paper Series

In a world of zero transaction costs, one should observe optimal invention and innovation. As long as a system of enforceable contracts were in place, firms with inventive capacity and firms requiring inventions would negotiate for the optimal production of new creations. With adequate information, an observer could accurately predict which transactions would occur between firms and which transactions would not, thereby permitting description of the conditions for optimal inventiveness. Patent remedies in a world with transactions costs can be calibrated so that real firms behave as ideal firms, providing incentives for real world transactions to mimic those in a …

Technology Forecasting For Wireless Communication, Timothy R. Anderson, Tugrul Unsal Daim, Jisun Kim

Engineering and Technology Management Faculty Publications and Presentations

Wireless communications technologies have undergone rapid changes over the last 30 years from analog approaches to digital-based systems. These technologies have improved on many fronts including bandwidth, range, and power requirements. Development of new telecommunications technologies is critical. It requires many years of efforts. In order to be competitive, it is critical to establish a roadmap of future technologies. This paper presents a framework to characterize, assess and forecast the wireless communication technologies. A DEA-based methodology was used for predicting the state-of-the-art in future wireless communications technologies.

The Dartmouth Stellar Evolution Database, Aaron Dotter, Brian Chaboyer, Darko Jevremović, Veselin Kostov

Dartmouth Scholarship

The ever-expanding depth and quality of photometric and spectroscopic observations of stellar populations increase the need for theoretical models in regions of age-composition parameter space that are largely unexplored at present. Stellar evolution models that employ the most advanced physics and cover a wide range of compositions are needed to extract the most information from current observations of both resolved and unresolved stellar populations. The Dartmouth Stellar Evolution Database is a collection of stellar evolution tracks and isochrones that spans a range of [Fe/H] from –2.5 to +0.5, [α/Fe] from –0.2 to +0.8 (for [Fe/H] ≤ 0) or +0.2 (for …

Raps Sheet, September 2008, Retirement Association Of Portland State

RAPS Sheet: Monthly Newsletter

No abstract provided.

A Review Of Physiological Simulation Models Of Intracranial Pressure Dynamics, Wayne W. Wakeland, Brahm Goldstein

Complex Systems Faculty Publications and Presentations

This paper reviews the literature regarding the development, testing, and application of physiology-based computer simulation models of intracranial pressure dynamics. Detailed comparative information is provided in tabular format about the model variables and logic, any data collected, model testing and validation methods, and model results. Several syntheses are given that summarize the research carried out by influential research teams and researchers, review important findings, and discuss the methods employed, limitations, and opportunities for further research.

Streaming Estimation Of Information-Theoretic Metrics For Anomaly Detection (Extended Abstract), Sergey Bratus, Joshua Brody, David Kotz, Anna Shubina

Dartmouth Scholarship

Information-theoretic metrics hold great promise for modeling traffic and detecting anomalies if only they could be computed in an efficient, scalable ways. Recent advances in streaming estimation algorithms give hope that such computations can be made practical. We describe our work in progress that aims to use streaming algorithms on 802.11a/b/g link layer (and above) features and feature pairs to detect anomalies.

An Integrated Approach To The Toxicity Evaluation Of Irish Marine Sediment - Chemical Assessment, Michelle Giltrap

Doctoral

This project was a collaborative project between the Marine Institute (MI) in Galway and Radiation and Environmental Science Centre (RESC) in the Technological University Dublin (DIT). In Ireland, at present, sediment quality assessments are generally reliant on chemical analysis alone with limited bioassay techniques available to further characterise the sediment. Some causative agents of toxicity to biological organisms are below analytical detection limits. Integration of bioassay data with chemical analysis is essential in order to complete a full ecotoxicological assessment of the quality of the marine environment. This project describes the chemical analysis of marine sediment for persistent pollutants from …

And They Were There -- Reports Of Meetings -- Electronic Resources In Libraries Conference, Salalm Annual Conference, Digin -- Digital Preservation Conference, Editor

Against the Grain

No abstract provided.

Digital Preservation And The Small Academic Library, Marilyn Geller

Against the Grain

No abstract provided.