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2007

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Relativistic Multiple Scattering Theory And The Relativistic Impulse Approximation, Khin Maung Maung, John W. Norbury, Trina Coleman Sep 2007

Relativistic Multiple Scattering Theory And The Relativistic Impulse Approximation, Khin Maung Maung, John W. Norbury, Trina Coleman

Faculty Publications

It is shown that a relativistic multiple scattering theory for hadron - nucleus scattering can be consistently formulated in four dimensions in the context of meson exchange. We give a multiple scattering series for the optical potential and discuss the differences between the relativistic and non- relativistic versions. We develop the relativistic multiple scattering series by separating out the one-boson exchange term from the rest of the Feynman series. However, this particular separation is not absolutely necessary and we discuss how to include other terms. We then show how to make a three- dimensional reduction for hadron - nucleus scattering …

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Snell's Law Of Refraction Observed In Thermal Frontal Polymerization, John A. Pojman, Veronika Viner, Burcu Binici, Shanna Lavergne, Melanie Winsper, Dmitry Golovaty, Laura Gross Sep 2007

Snell's Law Of Refraction Observed In Thermal Frontal Polymerization, John A. Pojman, Veronika Viner, Burcu Binici, Shanna Lavergne, Melanie Winsper, Dmitry Golovaty, Laura Gross

Faculty Publications

We demonstrate that Snell’s law of refraction can be applied to thermal fronts propagating through a boundary between regions that support distinct frontal velocities. We use the free-radical frontal polymerization of a triacrylate with clay filler that allows for two domains containing two different concentrations of a peroxide initiator to be molded together. Because the polymerization reaction rates depend on the initiator concentration, the propagation speed is different in each domain. We study fronts propagating in two parallel strips in which the incident angle is 90°. Our data fit Snell’s law vr/vi = sin θr/sin …

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University Reporter - Volume 12, Number 01 - September 2007 Sep 2007

University Reporter - Volume 12, Number 01 - September 2007

1996-2009, University Reporter

This issue of the University Reporter includes articles about the strategic planning of chancellor J. Keith Motley, studies out of the Psychology Department on treating anxiety disorders, the 10th annual Boston Folk Festival, an African-American mathematicians conference held at the University, and other news from UMass Boston.

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Change In Voltage Distortion Predictions At The Pcc Due To Changing Nonlinear Load Current Profile Using Plant Startup Data, Joy Mazumdar, Frank C. Lambert, Ganesh K. Venayagamoorthy, Ronald G. Harley Sep 2007

Change In Voltage Distortion Predictions At The Pcc Due To Changing Nonlinear Load Current Profile Using Plant Startup Data, Joy Mazumdar, Frank C. Lambert, Ganesh K. Venayagamoorthy, Ronald G. Harley

Electrical and Computer Engineering Faculty Research & Creative Works

Customer loads connected to electricity supply systems may be broadly categorized as either linear or nonlinear. Nonlinear loads inject harmonics in a power distribution network. The interaction of the nonlinear load harmonics with the network impedances creates voltage distortions at the point of common coupling (PCC) which in turn affects other loads connected to the same PCC. When several nonlinear loads are connected to the PCC, it is difficult to predict mathematically how each nonlinear load is affecting the voltage distortion level at the PCC. Typically, customers with nonlinear loads apply harmonic filtering techniques to clean up their current and …

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Mesophilic Digestion Kinetics Of Manure Slurry, Khursheed Karim, K. Thomas Klasson, Sadie R. Drescher, Whitney Ridenour, Abhijeet P. Borole, Muthanna H. Al-Dahhan Sep 2007

Mesophilic Digestion Kinetics Of Manure Slurry, Khursheed Karim, K. Thomas Klasson, Sadie R. Drescher, Whitney Ridenour, Abhijeet P. Borole, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

Anaerobic Digestion Kinetics Study of Cow Manure Was Performed at 35°C in Bench-Scale Gas-Lift Digesters (3.78 L Working Volume) at Eight Different Volatile Solids (VS) Loading Rates in the Range of 1.11-5.87 G L-1 Day-1. the Digesters Produced Methane at the Rates of 0.44-1.18 L L-1 Day-1, and the Methane Content of the Biogas Was Found to Increase with Longer Hydraulic Retention Time (HRT). based on the Experimental Observations, the Ultimate Methane Yield and the Specific Methane Productivity Were Estimated to Be 0.42 L CH4 (G vs. Loaded)-1 and 0.45 L CH …

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Missouri S&T Magazine Fall 2007, Missouri S&T Marketing And Communications Department, Miner Alumni Association Sep 2007

Missouri S&T Magazine Fall 2007, Missouri S&T Marketing And Communications Department, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

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Progress In Ctbt Monitoring Since Its 1999 Senate Defeat, David W. Hafemeister Sep 2007

Progress In Ctbt Monitoring Since Its 1999 Senate Defeat, David W. Hafemeister

Physics

Progress in monitoring the Comprehensive Nuclear Test Ban Treaty (CTBT) is examined, beginning with the 2002 National Academy of Sciences CTBT study, followed by recent findings on regional seismology, array-monitoring, correlation-detection, seismic modeling, and non-seismic technologies. The NAS-CTBT study concluded that the fully completed International Monitoring System (IMS) will reliably detect and identify underground nuclear explosions with a threshold of 0.1 kt in hard rock, if conducted anywhere in Europe, Asia, North Africa, and North America. In some locations the threshold is 0.01 kt or lower, using arrays or regional seismic stations, but with an increase in background events. As …

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Oneida Lake’S Cormorant Harassment Program – Frequently Asked Questions, Travis L. Devault Sep 2007

Oneida Lake’S Cormorant Harassment Program – Frequently Asked Questions, Travis L. Devault

United States Department of Agriculture Wildlife Services: Staff Publications

Oneida Lake's cormorant harassment program, which began in 1998, is an outstanding example of an outstanding example of an effective government response to environmental problems. This program, administered by the United States Department of Agriculture, Wildlife Services Division, has contributed mightily to a major resurgence in the lake's game fish populations during the past three years. In the following article, USDA biologist Travis DeVault answers questions that often arise about the harassment program.

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From The Field: An Extraordinary Patch Of Feral Hog Damage In Florida Before And After Initiating Hog Removal, John Woolard, Henry T. Smith, Jean Bourassa, Bernice U. Constantin, Daniel Griffin Sep 2007

From The Field: An Extraordinary Patch Of Feral Hog Damage In Florida Before And After Initiating Hog Removal, John Woolard, Henry T. Smith, Jean Bourassa, Bernice U. Constantin, Daniel Griffin

United States Department of Agriculture Wildlife Services: Staff Publications

Feral hogs (Sus scrofa) are a particularly destructive exotic species in the United States (U.S. Department of Agriculture 1999), including Florida, which, along with Hawaii, is one of 2 states cited as having the most severe invasive species problems (U.S. Congress 1993) in the country. First introduced to North America by the European colonists (Conover 2007) hogs were one of the first invasive exotic species to take hold in Florida. They can transmit disease to livestock (Hartin et al. 2007) and humans (Conover and Vail 2007). They impose a variety of negative environmental impacts, including habitat degradation and …

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Piloting A Program-Level Learning Assessment Plan In Plant And Soil Science, Teresa Cerny-Koenig, Catherine A. Perillo, Caroline Pearson-Mims, Kathleen M. Williams, Gary R. Brown, Andrew Morozov, William L. Pan, William E. Hendrix Sep 2007

Piloting A Program-Level Learning Assessment Plan In Plant And Soil Science, Teresa Cerny-Koenig, Catherine A. Perillo, Caroline Pearson-Mims, Kathleen M. Williams, Gary R. Brown, Andrew Morozov, William L. Pan, William E. Hendrix

Office of Academic Innovation Publications

Faculty of Washington State University's undergraduate degree programs in Crop Science, Soil Science, and Horticulture initiated the development and implementation of an assessment process to gauge the extent to which WSU students in the plant and soil science programs meet university and program learning goals. This process was undertaken primarily to help improve our joint teaching efforts and students' learning; it also was encouraged by the needed documentation for the 2007 university accreditation and a need to better match our program learning goals with the University's newly developed Learning Goals of the Baccalaureate. The new program-level assessment plan focused on …

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Manipulating Underdetermination In Scientific Controversy: The Case Of The Molecular Clock, Michael Dietrich, Robert A. Skipper Sep 2007

Manipulating Underdetermination In Scientific Controversy: The Case Of The Molecular Clock, Michael Dietrich, Robert A. Skipper

Dartmouth Scholarship

Where there are cases of underdetermination in scientific controversies, such as the case of the molecular clock, scientists may direct the course and terms of dispute by playing off the multidimensional framework of theory evaluation. This is because assessment strategies themselves are underdetermined. Within the framework of assessment, there are a variety of trade-offs between different strategies as well as shifting emphases as specific strategies are given more or less weight in assessment situations. When a strategy is underdetermined, scientists can change the dynamics of a controversy by making assessments using different combinations of evaluation strategies and/or weighting whatever strategies …

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Stellar Population Models And Individual Element Abundances. I. Sensitivity Of Stellar Evolution Models, Aaron Dotter, Brian Chaboyer, Jason W. Ferguson, Hyun-Chul Lee Sep 2007

Stellar Population Models And Individual Element Abundances. I. Sensitivity Of Stellar Evolution Models, Aaron Dotter, Brian Chaboyer, Jason W. Ferguson, Hyun-Chul Lee

Dartmouth Scholarship

Integrated light from distant galaxies is often compared to stellar population models via the equivalent widths of spectral features—spectral indices—whose strengths rely on the abundances of one or more elements. Such comparisons hinge not only on the overall metal abundance, but also on relative abundances. Studies have examined the influence of individual elements on synthetic spectra but little has been done to address similar issues in the stellar evolution models that underlie most stellar population models. Stellar evolution models will primarily be influenced by changes in opacities. In order to explore this issue in detail, 12 sets of stellar evolution …

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Full Page Ads, Editor Sep 2007

Full Page Ads, Editor

Against the Grain

No abstract provided.

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2,3,8,12,13-Penta­Meth­Oxy-5h-Dibenzo­[C,N]Acridin-7(6h)-One Toluene Solvate, Marlon R. Lutz Jr, Matthias Zeller, Daniel P. Becker Ph.D. Sep 2007

2,3,8,12,13-Penta­Meth­Oxy-5h-Dibenzo­[C,N]Acridin-7(6h)-One Toluene Solvate, Marlon R. Lutz Jr, Matthias Zeller, Daniel P. Becker Ph.D.

Chemistry: Faculty Publications and Other Works

The title compound, C26H25NO6·C7H8, formed by an unexpected tandem reaction of Beckmann rearrangement, electrophilic aromatic addition and subsequent demethyl­ation, was crystallized as its toluene solvate. The crystal under investigation was found to be nonmerohedrally twinned by a rotation around the reciprocal axis [100]; the twin ratio refined to 0.688 (2):0.312 (2). The mol­ecule exhibits an unusual helical arrangement of three six-membered rings that are all connected at one central C atom. The helix effectively performs one full turn around this atom, and the thread pitch, as defined by the distance of the terminal C atoms of the helix, is 4.98 …

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Evolutionary Combinatorial Optimization For Recursive Supervised Learning With Clustering, Kiruthika Ramanathan, Sheng Uei Guan Sep 2007

Evolutionary Combinatorial Optimization For Recursive Supervised Learning With Clustering, Kiruthika Ramanathan, Sheng Uei Guan

Research Collection School Of Computing and Information Systems

The idea of using a team of weak learners to learn a dataset is a successful one in literature. In this paper, we explore a recursive incremental approach to ensemble learning. In this paper, patterns are clustered according to the output space of the problem, i.e., natural clusters are formed based on patterns belonging to each class. A combinatorial optimization problem is therefore formed, which is solved using evolutionary algorithms. The evolutionary algorithms identify the "easy" and the "difficult" clusters in the system. The removal of the easy patterns then gives way to the focused learning of the more complicated …

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Toward Automating Ea Configuration: The Parent Selection Stage, Ekaterina Smorodkina, Daniel R. Tauritz Sep 2007

Toward Automating Ea Configuration: The Parent Selection Stage, Ekaterina Smorodkina, Daniel R. Tauritz

Computer Science Faculty Research & Creative Works

One of the obstacles to Evolutionary Algorithms (EAs) fulfilling their promise as easy to use general-purpose problem solvers, is the difficulty of correctly configuring them for specific problems such as to obtain satisfactory performance. Having a mechanism for automatically configuring parameters and operators of every stage of the evolutionary life-cycle would give EAs a more widely spread popularity in the non-expert community. This paper investigates automatic configuration of one of the stages of the evolutionary life-cycle, the parent selection, via a new concept of semi-autonomous parent selection, where mate selection operators are encoded and evolved as in Genetic Programming. We …

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Ontology-Enriched Semantic Space For Video Search, Xiao-Yong Wei, Chong-Wah Ngo Sep 2007

Ontology-Enriched Semantic Space For Video Search, Xiao-Yong Wei, Chong-Wah Ngo

Research Collection School Of Computing and Information Systems

Multimedia-based ontology construction and reasoning have recently been recognized as two important issues in video search, particularly for bridging semantic gap. The lack of coincidence between low-level features and user expectation makes concept-based ontology reasoning an attractive midlevel framework for interpreting high-level semantics. In this paper, we propose a novel model, namely ontology-enriched semantic space (OSS), to provide a computable platform for modeling and reasoning concepts in a linear space. OSS enlightens the possibility of answering conceptual questions such as a high coverage of semantic space with minimal set of concepts, and the set of concepts to be developed for …

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Deception In Cyberspace: A Comparison Of Text-Only Vs. Avatar-Supported Medium, Holtjona Galanxhi, Fiona Fui-Hoon Nah Sep 2007

Deception In Cyberspace: A Comparison Of Text-Only Vs. Avatar-Supported Medium, Holtjona Galanxhi, Fiona Fui-Hoon Nah

Research Collection School Of Computing and Information Systems

The use of anthropomorphic avatars provides Internet users the opportunity and freedom to manipulate their identity. As cyberspace becomes a haven for deceptive behavior, human–computer interaction research will need to be carried out to study and understand these deceptive behaviors. The objective of this research is to investigate the behavior of deceivers and non-deceivers (or truth-tellers) in the cyberspace environment. We examine if the intention to deceive others influences one's choice of avatars in the online chat environment. We also investigate if communication medium (text-only vs. avatar-supported chat) influences one's perception of trustworthiness of the communication partner. A lab experiment …

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The Future Of Information Systems Engineering, Keng Siau Sep 2007

The Future Of Information Systems Engineering, Keng Siau

Research Collection School Of Computing and Information Systems

No abstract provided.

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Taking Stock Of The Creative Commons Experiment: Monitoring The Use Of Creative Commons Licenses And Evaluating Its Implications For The Future Of Creative Commons And For Copyright Law, Giorgos Cheliotis, Warren B. Chik, Ankit Guglani, Giri Kumar Tayi Sep 2007

Taking Stock Of The Creative Commons Experiment: Monitoring The Use Of Creative Commons Licenses And Evaluating Its Implications For The Future Of Creative Commons And For Copyright Law, Giorgos Cheliotis, Warren B. Chik, Ankit Guglani, Giri Kumar Tayi

Research Collection Yong Pung How School Of Law

We provide an analysis of the use of Creative Commons (CC) licenses, an approach to licens-ing creative works which has become very popular among authors who wish to promote more liberal sharing and use of their work. We provide data demonstrating the popularity of CC, ex-amine which specific license types within the CC framework are most popular, and then iden-tify contributing factors for the relative popularity of some of the license types. This includes in-dividual author incentives, the consistency and aims of the online communities which adopt CC as a licensing model, the underlying medium (text, photography, audio, video or …

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Wrl Newsletter September 2007, Maryke Barber Sep 2007

Wrl Newsletter September 2007, Maryke Barber

WRL Newsletters

No abstract provided.

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Blue Nile Incision On The Ethiopian Plateau: Pulsed Plateau Growth, Pliocene Uplift, And Hominin Evolution, Nahid D.S. Gani, M. Royhan Gani, Mohamed G. Abdel Salam Sep 2007

Blue Nile Incision On The Ethiopian Plateau: Pulsed Plateau Growth, Pliocene Uplift, And Hominin Evolution, Nahid D.S. Gani, M. Royhan Gani, Mohamed G. Abdel Salam

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The 1.6-km-deep Gorge of the Nile, a rival of the Grand Canyon, resulted from the deep incision of the Blue Nile drainage into the uplifted Ethiopian Plateau. Understanding the incision history of the plateau is crucial to unraveling the Cenozoic tectonoclimatic evolution of the region, particularly because the region has long been used as a natural laboratory to understand the geodynamics of continental rifting and the evolution of hominins. We undertake a quantitative geomorphologic approach integrating field, geographic information system (GIS), and digital elevation model (DEM) data to analyze incision (volume, long-term rates, and spatiotemporal variability) and river longitudinal profiles …

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Hydrology And The Courts: The Role Of Expert Witnesses - A Study On Potential Reforms, Mariam J. Masid Sep 2007

Hydrology And The Courts: The Role Of Expert Witnesses - A Study On Potential Reforms, Mariam J. Masid

Water Law Review

No abstract provided.

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Poisson Disk Point Sets By Hierarchical Dart Throwing, David Cline, Parris K. Egbert, Kenric B. White Sep 2007

Poisson Disk Point Sets By Hierarchical Dart Throwing, David Cline, Parris K. Egbert, Kenric B. White

Faculty Publications

Poisson disk point sets are “ideally” generated through a process of dart throwing. The naive dart throwing algorithm is extremely expensive if a maximal set is desired, however. In this paper we present a hierarchical dart throwing procedure which produces point sets that are equivalent to naive dart throwing, but is very fast. The procedure works by intelligently excluding areas known to be fully covered by existing samples. By excluding covered regions, the probability of accepting a thrown dart is greatly increased. Our algorithm is conceptually simple, performs dart throwing in O(N) time and memory, and produces a maximal point …

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Microbial Nanowires: Is The Subsurface "Hardwired"?, Dimitrios Ntarlagiannis, Estella A. Atekwana, Eric A. Hill, Yuri A. Gorby Sep 2007

Microbial Nanowires: Is The Subsurface "Hardwired"?, Dimitrios Ntarlagiannis, Estella A. Atekwana, Eric A. Hill, Yuri A. Gorby

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The Earth's shallow subsurface results from integrated biological, geochemical, and physical processes. Methods are sought to remotely assess these interactive processes, especially those catalysed by micro-organisms. Using saturated sand columns and the metal reducing bacterium Shewanella oneidensis MR-1, we show that electrically conductive appendages called bacterial nanowires are directly associated with electrical potentials. No significant electrical potentials were detectable in columns inoculated with mutant strains that produced non-conductive appendages. Scanning electron microscopy imaging revealed a network of nanowires linking cells-cells and cells to mineral surfaces, "hardwiring" the entire length of the column. We hypothesize that the nanowires serve as conduits …

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A Trend Pattern Assessment Approach To Microarray Gene Expression Profiling Data Analysis, Kahai Cao, Qiuming Zhu, Javeed Iqbal, John W.C. Chan Sep 2007

A Trend Pattern Assessment Approach To Microarray Gene Expression Profiling Data Analysis, Kahai Cao, Qiuming Zhu, Javeed Iqbal, John W.C. Chan

Computer Science Faculty Publications

We study the problem of how to assess the reliability of a statistical measurement on data set containing unknown quantity of noises, inconsistencies, and outliers. A practical approach that analyzes the dynamical patterns (trends) of the statistical measurements through a sequential extreme-boundary-points (EBP) weed-out process is explored. We categorize the weed-out trend patterns (WOTP) and examine their relation to the reliability of the measurement. The approach is applied to the processes of extracting genes that are predictive to BCL2 translocations and to clinical survival outcomes of diffuse large B-cell lymphoma (DLBCL) from DNA Microarray gene expression profiling data sets. Fisher’s …

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A Three-Tier Knowledge Management Scheme For Software Engineering Support And Innovation, Richard Corbin, Christopher B. Dunbar, Qiuming Zhu Sep 2007

A Three-Tier Knowledge Management Scheme For Software Engineering Support And Innovation, Richard Corbin, Christopher B. Dunbar, Qiuming Zhu

Computer Science Faculty Publications

To ensure smooth and successful transition of software innovations to enterprise systems, it is critical to maintain proper levels of knowledge about the system configuration, the operational environment, and the technology in both existing and new systems. We present a three-tier knowledge management scheme through a systematic planning of actions spanning the transition processes in levels from conceptual exploration to prototype development, experimentation, and product evaluation. The three-tier scheme is an integrated effort for bridging the development and operation communities, maintaining stability to the operational performance, and adapting swiftly to software technology innovations. The scheme combines experiences of academic researches …

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A Stolchastic Analysis Of The Holling Resilience Of An Orchard, Amitrajeet A. Batabyal, Seung Yoo Sep 2007

A Stolchastic Analysis Of The Holling Resilience Of An Orchard, Amitrajeet A. Batabyal, Seung Yoo

Articles

Recently, Batabyal and Yoo (2007) have proposed a new probabilistic approach to orchard management. In this approach, a manager minimizes an economic criterion function, namely, the long run expected net cost of orchard management subject to an ecological constraint which says that the probability that an orchard is not Holling resilient is at most as large as an exogenously given value. In this note, we continue this line of inquiry and shed additional light on an orchard’s Holling resilience. First, we model an orchard as a stochastic ecological-economic system. Second, we compute this orchard’s Holling resilience in a general way. …

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The Impact Of Option-In Longevity Enrollment Patterns On Student Achievement, Behavior, And Engagement Outcomes, Andrew J. Rikli Sep 2007

The Impact Of Option-In Longevity Enrollment Patterns On Student Achievement, Behavior, And Engagement Outcomes, Andrew J. Rikli

Student Work

The impact of option-in longevity patterns on student achievement, behavior, and engagement outcomes was evaluated. The seventh-grade pretest compared the seventhgrade posttest gains made by students who were enrolled short-term (n = 46) as they completed their first year in a middle school setting indicated that the exposure to a consistent and equitable educational program continued to result in positive student outcomes. Levels of performance for option-in students were also found to be congruent with the posttest achievement, behavior, and engagement data for students who are residents of the district (n = 46). School choice options and longevity within a …

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The Effect Of A Founding International Baccalaureate Middle Years Programme On Participating Seventh Grade Students' Achievement, Behavior, Extra-Curricular Involvement, And Perceptions Of Life Skills, Joan C.R. Wilson Sep 2007

The Effect Of A Founding International Baccalaureate Middle Years Programme On Participating Seventh Grade Students' Achievement, Behavior, Extra-Curricular Involvement, And Perceptions Of Life Skills, Joan C.R. Wilson

Student Work

The purpose of this study was to determine the effect of a founding International Baccalaureate Middle Years Programme (IBMYP) on participating 7th-grade students' achievement, behavior, extra-curricular involvement, and perceptions of life skills compared to 7th-grade students' completing the same school's standard of care traditional academic program (TAP). The study analyzed data of IBMYP and TAP students to determine if the IBMYP has significantly impacted student outcomes. Following two consecutive years of program participation IBMYP students (n = 30) demonstrated a significant pretest-posttest improvement on norm-referenced achievement test math scores but their measured language and reading achievement test scores remained consistent …

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