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2001

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Full-Text Articles in Science and Technology Studies

Profile Combinatorics For Fragment Selection In Comparative Protein Structure Modeling, Deacon Sweeney, Travis E. Doom, Michael L. Raymer Nov 2001

Profile Combinatorics For Fragment Selection In Comparative Protein Structure Modeling, Deacon Sweeney, Travis E. Doom, Michael L. Raymer

Kno.e.sis Publications

Sequencing of the human genome was a great stride towards modeling cellular complexes, massive systems whose key players are proteins and DNA. A major bottleneck limiting the modeling process is structure and function annotation for the new genes. Contemporary protein structure prediction algorithms represent the sequence of every protein of known structure with a profile to which the profile of a protein sequence of unknown structure is compared for recognition. We propose a novel approach to increase the scope and resolution of protein structure profiles. Our technique locates equivalent regions among the members of a structurally similar fold family, and ...


Knowledge Discovery In Biological Datasets Using A Hybrid Bayes Classifier/Evolutionary Algorithm, Michael L. Raymer, Leslie A. Kuhn, William F. Punch Nov 2001

Knowledge Discovery In Biological Datasets Using A Hybrid Bayes Classifier/Evolutionary Algorithm, Michael L. Raymer, Leslie A. Kuhn, William F. Punch

Kno.e.sis Publications

A key element of bioinformatics research is the extraction of meaningful information from large experimental data sets. Various approaches, including statistical and graph theoretical methods, data mining, and computational pattern recognition, have been applied to this task with varying degrees of success. We have previously shown that a genetic algorithm coupled with a k-nearest-neighbors classifier performs well in extracting information about protein-water binding from X-ray crystallographic protein structure data. Using a novel classifier based on the Bayes discriminant function, we present a hybrid algorithm that employs feature selection and extraction to isolate salient features from large biological data sets. The ...


A Passion For Ideas: How Innovators Create The New And Shape Our World, Heinrich V. Pierer, Bolko V. Oetinger Oct 2001

A Passion For Ideas: How Innovators Create The New And Shape Our World, Heinrich V. Pierer, Bolko V. Oetinger

Purdue University Press Books

Business and industry leaders are eager to find ways to spark the creative instinct in their work forces. This newly translated work examines the multi-layered environment of innovation by melding the thoughts of business management pundits like Peter Senge with the views of artist, politicians, and other non-traditional thinkers like Tao Ho, Peter Greenaway, and Wolfgang Rihm.


Online Bayesian Tree-Structured Transformation Of Hmms With Optimal Model Selection For Speaker Adaptation, Shaojun Wang, Yunxin Zhao Sep 2001

Online Bayesian Tree-Structured Transformation Of Hmms With Optimal Model Selection For Speaker Adaptation, Shaojun Wang, Yunxin Zhao

Kno.e.sis Publications

This paper presents a new recursive Bayesian learning approach for transformation parameter estimation in speaker adaptation. Our goal is to incrementally transform or adapt a set of hidden Markov model (HMM) parameters for a new speaker and gain large performance improvement from a small amount of adaptation data. By constructing a clustering tree of HMM Gaussian mixture components, the linear regression (LR) or affine transformation parameters for HMM Gaussian mixture components are dynamically searched. An online Bayesian learning technique is proposed for recursive maximum a posteriori (MAP) estimation of LR and affine transformation parameters. This technique has the advantages of ...


Environment As Master Narrative: Discourse And Identity In Environmental Conflicts (Special Issue Introduction), Krista Harper Jul 2001

Environment As Master Narrative: Discourse And Identity In Environmental Conflicts (Special Issue Introduction), Krista Harper

Anthropology Department Faculty Publication Series

Although postmodern philosophers proclaimed the death of the master narrative of enlightenment (Lyotard 1984), the environment has become a quintessentially global narrative. Throughout the world, people are imagining the environment as an object threatened by human action. Environmentalism proposes to organize and mobilize human action in order to protect the endangered environment (Milton 1995). Sociologist Klaus Eder posits that ecology has become a “masterframe,” transforming the field of political debate (Eder 1996). The articles assembled in this special issue investigate the rise of the environment as a master narrative organizing political practices.


Chernobyl Stories And Anthropological Shock In Hungary, Krista Harper Jul 2001

Chernobyl Stories And Anthropological Shock In Hungary, Krista Harper

Anthropology Department Faculty Publication Series

The Budapest Chernobyl Day commemoration generated a creative outpouring of stories about parental responsibilities, scientific knowledge, environmental risks, and public participation. I examine the stories and performances elicited by the tenth anniversary of the Chernobyl nuclear disaster in April 1996. In these “Chernobyl stories,” activists criticized scientific and state paternalism while engaging in alternative practices of citizenship. The decade between the catastrophic explosion and its commemoration coincides with the development of the Hungarian environmental movement and the transformation from state socialism. Chernobyl Day 1996 consequently became an opportunity for activists to reflect upon how the meaning of citizenship and public ...


Chernobyl Stories And Anthropological Shock In Hungary, Krista Harper Jul 2001

Chernobyl Stories And Anthropological Shock In Hungary, Krista Harper

Krista M. Harper

The Budapest Chernobyl Day commemoration generated a creative outpouring of stories about parental responsibilities, scientific knowledge, environmental risks, and public participation. I examine the stories and performances elicited by the tenth anniversary of the Chernobyl nuclear disaster in April 1996. In these “Chernobyl stories,” activists criticized scientific and state paternalism while engaging in alternative practices of citizenship. The decade between the catastrophic explosion and its commemoration coincides with the development of the Hungarian environmental movement and the transformation from state socialism. Chernobyl Day 1996 consequently became an opportunity for activists to reflect upon how the meaning of citizenship and public ...


Semantic Operators And Fixed-Point Theory In Logic Programming, Anthony K. Seda, Pascal Hitzler Jul 2001

Semantic Operators And Fixed-Point Theory In Logic Programming, Anthony K. Seda, Pascal Hitzler

Computer Science and Engineering Faculty Publications

We consider rather general operators mapping valuations to (sets of) valuations in the context of the semantics of logic programming languages. This notion generalizes several of the standard operators encountered in this subject and is inspired by earlier work of M.C. Fitting. The fixed points of such operators play a fundamental role in logic programming semantics by providing standard models of logic programs and also in determining the computability properties of these standard models. We discuss some of our recent work employing topological ideas, in conjunction with order theory, to establish methods by which one can find the fixed ...


The Conference Proceedings Of The 2001 Air Transport Research Society (Atrs) Of The Wctr Society, Volume 2, Yeong-Heok Lee, Brent D. Bowen, Scott E. Tarry, Uno Aviation Institute Jul 2001

The Conference Proceedings Of The 2001 Air Transport Research Society (Atrs) Of The Wctr Society, Volume 2, Yeong-Heok Lee, Brent D. Bowen, Scott E. Tarry, Uno Aviation Institute

Faculty Books and Monographs

UNOAI Report 01-7


The Conference Proceedings Of The 2001 Air Transport Research Society (Atrs) Of The Wctr Society, Volume 3, Yeong-Heok Lee, Brent D. Bowen, Scott E. Tarry, Uno Aviation Institute Jul 2001

The Conference Proceedings Of The 2001 Air Transport Research Society (Atrs) Of The Wctr Society, Volume 3, Yeong-Heok Lee, Brent D. Bowen, Scott E. Tarry, Uno Aviation Institute

Faculty Books and Monographs

UNOAI Report 01-8


Environment As Master Narrative: Discourse And Identity In Environmental Conflicts (Special Issue Introduction), Krista Harper Jun 2001

Environment As Master Narrative: Discourse And Identity In Environmental Conflicts (Special Issue Introduction), Krista Harper

Krista M. Harper

Although postmodern philosophers proclaimed the death of the master narrative of enlightenment (Lyotard 1984), the environment has become a quintessentially global narrative. Throughout the world, people are imagining the environment as an object threatened by human action. Environmentalism proposes to organize and mobilize human action in order to protect the endangered environment (Milton 1995). Sociologist Klaus Eder posits that ecology has become a “masterframe,” transforming the field of political debate (Eder 1996). The articles assembled in this special issue investigate the rise of the environment as a master narrative organizing political practices.


Summarizing Data Sets For Classification, Christopher W. Kinzig, Krishnaprasad Thirunarayan, Gary B. Lamont, Robert E. Marmelstein Jun 2001

Summarizing Data Sets For Classification, Christopher W. Kinzig, Krishnaprasad Thirunarayan, Gary B. Lamont, Robert E. Marmelstein

Kno.e.sis Publications

This paper describes our approach and experiences with implementing a data mining system using genetic algorithms in C++. In contrast with earlier classification algorithms that tended to “tile” the data sets using some pre-specified “shapes”, the proposed system is based on Marmelstein’s work on determining natural boundaries for class homogeneous regions. These boundaries are further refined to construct a compact set of simple data mining rules for classification.


Query Processing With An Fpga Coprocessor Board, Jack S. Jean, Guozhu Dong, Hwa Zhang, Xinzhong Guo, Baifeng Zhang Jun 2001

Query Processing With An Fpga Coprocessor Board, Jack S. Jean, Guozhu Dong, Hwa Zhang, Xinzhong Guo, Baifeng Zhang

Kno.e.sis Publications

In this paper, a commercial FPGA coprocessor board is used to accelerate the processing of queries on a relational database that contains texts and images. FPGA designs for text searching and image matching are described and their performances summarized. A potential design for a database JOIN operator is then studied. A query optimization preprocessor is then proposed.


Making Use Of The Most Expressive Jumping Emerging Patterns For Classification, Jinyan Li, Guozhu Dong, Kotagiri Ramamohanarao May 2001

Making Use Of The Most Expressive Jumping Emerging Patterns For Classification, Jinyan Li, Guozhu Dong, Kotagiri Ramamohanarao

Kno.e.sis Publications

Classification aims to discover a model from training data that can be used to predict the class of test instances. In this paper, we propose the use of jumping emerging patterns (JEPs) as the basis for a new classifier called the JEP-Classifier. Each JEP can capture some crucial difference between a pair of datasets. Then, aggregating all JEPs of large supports can produce a more potent classification power. Procedurally, the JEP-Classifier learns the pair-wise features (sets of JEPs) contained in the training data, and uses the collective impacts contributed by the most expressive pair-wise features to determine the class labels ...


Developing Better Economic Information About Coastal Resources As A Tool For Integrated Coastal Management, Judith T. Kildow Dr, Brian Baird, Charles S. Colgan, Hauke Kite-Powell, Rodney Weiher Apr 2001

Developing Better Economic Information About Coastal Resources As A Tool For Integrated Coastal Management, Judith T. Kildow Dr, Brian Baird, Charles S. Colgan, Hauke Kite-Powell, Rodney Weiher

Publications

Measuring economic activity associated with the ocean through examination of the goods and services produced by specified industries and in coastal locations will provide answers to many of the most commonly asked questions about the ocean economy. But even this data will still be incomplete. Beyond are a variety of "non-market" values, which are needed to complete the picture. When someone goes to the beach in Florida or boats on Chesapeake Bay, there may be little that is directly purchased on that day. But the popularity of such activities is testament to their underlying value. Economists have developed a variety ...


The Airline Quality Rating 2001, Brent D. Bowen, Dean Headley, Uno Aviation Institute Apr 2001

The Airline Quality Rating 2001, Brent D. Bowen, Dean Headley, Uno Aviation Institute

Faculty Books and Monographs

UNOAI Report 01-2

The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline quality on combined multiple performance criteria. This current report, Airline Quality Rating 2001, reflects monthly Airline Quality Rating scores for 2000. AQR scores for the calendar year 2000 are based on 15 elements that focus on airline performance areas important to air travel consumers.

The Airline Quality Rating 2001 is a summary of month-by-month quality ratings for the ten major U.S. airlines operating during 2000. Using the Airline Quality Rating system of weighted averages and monthly ...


Softwareentwicklung In Deutschland: Eine Bestandsaufnahme, Michael Friedewald, Hans Dieter Rombach, Petra Stahl, Manfred Broy, Susanne Hartkopf, Simone Kimpeler, Kirstin Kohler, Robert Wucher, Peter Zoche Mar 2001

Softwareentwicklung In Deutschland: Eine Bestandsaufnahme, Michael Friedewald, Hans Dieter Rombach, Petra Stahl, Manfred Broy, Susanne Hartkopf, Simone Kimpeler, Kirstin Kohler, Robert Wucher, Peter Zoche

Michael Friedewald

Die hier vorgestellte Studie „Analyse und Evaluation der Softwareentwicklung in Deutschland" [2] wurde von der GfK Marktforschung GmbH in Zusammenarbeit mit den Fraunhofer-Instituten für Experimentelles Software Engineering (IESE) und für Systemtechnik und Innovationsforschung (ISI) für das Bundesmini¬sterium für Bildung und Forschung (BMBF) durchgeführt. Ziel der Untersuchung war es, den nationalen Softwaremarkt, der sich immer mehr zu einem der Schlüsselmärkte entwickelt, quantitativ und qualitativ zu charakterisieren sowie in seiner weiteren Entwicklung und seinen Anforderungen zu beschreiben.


Survivability Architecture For Workflow Management Systems, Jorge Cardoso, Zongwei Luo, John A. Miller, Amit P. Sheth, Krzysztof J. Kochut Mar 2001

Survivability Architecture For Workflow Management Systems, Jorge Cardoso, Zongwei Luo, John A. Miller, Amit P. Sheth, Krzysztof J. Kochut

Kno.e.sis Publications

The survivability of critical infrastructure systems has been gaining increasing concern from the industry. The survivability research area addresses the issue of infrastructure systems that continues to provide pre-established service levels to users in the face of disorders and react to changes in the surrounding environment. Workflow management systems need to be survivable since they are used to support critical and sensitive business processes. They require a high level of dependability and should not allow process instances to be interrupted or aborted due to failures. Moreover, due to their sensitivity, business process should reflect any change in the environment. In ...


La Sanidad Desde El Otro Lado, Manuel Fernández-Esquinas, Luís Gavira, Manuel Pérez Yruela, Manuel Trujillo Carmona, Rafael Serrano Jan 2001

La Sanidad Desde El Otro Lado, Manuel Fernández-Esquinas, Luís Gavira, Manuel Pérez Yruela, Manuel Trujillo Carmona, Rafael Serrano

Manuel Fernández-Esquinas

No abstract provided.


Us Manufacturing Extension Partnerships: Technology Policy Reinvented, Philip Shapira Jan 2001

Us Manufacturing Extension Partnerships: Technology Policy Reinvented, Philip Shapira

Philip Shapira

The US manufacturing extension partnership (MEP) is examined as an example of the new partnership paradigm in US technology policy. The MEP provides technology assistance services, particularly for small and medium-sized enterprises. Influenced by aims to reinvent government and reorient technology policy, the MEP seeks to be comprehensive, collaborative, and demand-driven. However, the MEP’s partnered management style is constrained by political and industrial systems that continue to operate on traditional lines. After probing these tensions, the paper offers insights for the MEP’s future development and for other technology and innovation policies that seek to emulate the MEP’s ...


Application Service Providing, Michael Friedewald, Peter Georgieff, Markus Joepgen Jan 2001

Application Service Providing, Michael Friedewald, Peter Georgieff, Markus Joepgen

Michael Friedewald

No abstract provided.


A "Converse" Of The Banach Contraction Mapping Theorem, Pascal Hitzler, Anthony K. Seda Jan 2001

A "Converse" Of The Banach Contraction Mapping Theorem, Pascal Hitzler, Anthony K. Seda

Computer Science and Engineering Faculty Publications

We prove a type of converse of the Banach contraction mapping theorem for metric spaces: if X is a T1 topological space and f: X -> X is a function with the unique fixed point a such that fn(x) converges to a for each x is a member of X, then there exists a distance function d on X such that f is a contraction on the complete ultrametric space (X,d) with contractivity factor 1/2. We explore properties of the resulting space (X,d).


Latent Maximum Entropy Principle For Statistical Language Modeling, Shaojun Wang, Ronald Rosenfeld, Yunxin Zhao Jan 2001

Latent Maximum Entropy Principle For Statistical Language Modeling, Shaojun Wang, Ronald Rosenfeld, Yunxin Zhao

Kno.e.sis Publications

We describe a unified probabilistic framework for statistical language modeling, the latent maximum entropy principle. The salient feature of this approach is that the hidden causal hierarchical dependency structure can be encoded into the statistical model in a principled way by mixtures of exponential families with a rich expressive power. We first show the problem formulation, solution, and certain convergence properties. We then describe how to use this machine learning technique to model various aspects of natural language, such as syntactic structure of sentences, semantic information in a document. Finally, we draw a conclusion and point out future research directions.


Unique Supported-Model Classes Of Logic Programs, Pascal Hitzler, Anthony K. Seda Jan 2001

Unique Supported-Model Classes Of Logic Programs, Pascal Hitzler, Anthony K. Seda

Computer Science and Engineering Faculty Publications

We study classes of programs, herein called unique supported-model classes, with the property that each program in the class has a unique supported model. Elsewhere, the authors examined these classes from the point of view of operators defined relative to certain three-valued logics. In this paper, we complement our earlier results by considering how unique supported-model classes fit into the framework given by various classes of programs in several well-known approaches to semantics.


Kontraktionssatze Auf Verallgemeinerten Metrischen Raumen, Pascal Hitzler Jan 2001

Kontraktionssatze Auf Verallgemeinerten Metrischen Raumen, Pascal Hitzler

Computer Science and Engineering Faculty Publications


On The Soft X-Ray Spectrum Of Cooling Flows, A C. Fabian, R F. Mushotzky, Paul E. J Nulsen, J R. Peterson Jan 2001

On The Soft X-Ray Spectrum Of Cooling Flows, A C. Fabian, R F. Mushotzky, Paul E. J Nulsen, J R. Peterson

Faculty of Engineering and Information Sciences - Papers: Part A

Strong evidence for cooling flows has been found in low-resolution X-ray imaging and spectra of many clusters of galaxies. However, high-resolution X-ray spectra of several clusters from the Reflection Grating Spectrometer on XMM-Newton now show a soft X-ray spectrum inconsistent with a simple cooling flow. The main problem is a lack of the emission lines expected from gas cooling below 1–2 keV. Lines from gas at about 2–3 keV are observed, even in a high-temperature cluster such as A1835, indicating that gas is cooling down to about 2–3 keV, but is not found at lower temperatures. Here ...


Numerical Investigation Of The Angle Of Repose Of Monosized Spheres, Y C. Zhou, B H. Xu, Aibing Yu, Paul Zulli Jan 2001

Numerical Investigation Of The Angle Of Repose Of Monosized Spheres, Y C. Zhou, B H. Xu, Aibing Yu, Paul Zulli

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents a numerical study of the angle of repose, a most important macroscopic parameter in characterizing granular materials, by means of a modified distinct element method. Emphasis is given to the effect of variables related to factors such as particle characteristics, material properties, and geometrical constraints. The results show that sliding and rolling frictions are the primary reasons for the formation of a sandpile; particle size and container thickness significantly influence the angle of repose; and the angle of repose is not so sensitive to density, Poisson's ratio, damping coefficient, and Young's modulus. Increasing rolling friction ...


A Hierarchical Classifier For Multispectral Satellite Imagery, Abdesselam Bouzerdoum Jan 2001

A Hierarchical Classifier For Multispectral Satellite Imagery, Abdesselam Bouzerdoum

Faculty of Engineering and Information Sciences - Papers: Part A

In this article, a hierarchical classifier is proposed for classification of ground-cover types of a satellite image of Kangaroo Island, South Australia. The image contains seven ground-cover types, which are categorized into three groups using principal component analysis. The first group contains clouds only, the second consists of sea and cloud shadow over land, and the third contains land and three types of forest. The sea and shadow over land classes are classified with 99% accuracy using a network of threshold logic units. The land and forest classes are classified by multilayer perceptrons (MLPs) using texture features and intensity values ...


Does The Model Matter For Greg Estimation? A Business Survey Example, Dan Hedlin, Hannah Falvey, Raymond Chambers, Phillip Kokic Jan 2001

Does The Model Matter For Greg Estimation? A Business Survey Example, Dan Hedlin, Hannah Falvey, Raymond Chambers, Phillip Kokic

Faculty of Engineering and Information Sciences - Papers: Part A

Although asymptotically design-unbiased, GREG estimators may produce bad estimates. The article examines the behaviour of GREG estimators when the underlying models are misspecified. It shows how an efficient GREG estimator was found for a business survey that posed some problems. The work involved data exploration in several steps, combined with analyses of g-weights, residuals and standard regression diagnostics. We discuss two diagnostics for whether a GREG estimate is reasonable or not. A common justification for the use of GREG estimators is that, being asymptotically design unbiased, they are relatively robust to model choice. However, we show that the property of ...


Mat: A Mobile Agent System For Supporting Autonomous Mobile Agents, Wei Li, Minjie Zhang Jan 2001

Mat: A Mobile Agent System For Supporting Autonomous Mobile Agents, Wei Li, Minjie Zhang

Faculty of Engineering and Information Sciences - Papers: Part A

Mobile Agent Template (MAT) is a mobile agent system that is under study and development at the Institute of Computing Technology, Chinese Academy of Sciences and sponsored by the University of Wollongong, Australia. MAT is not an alternative to other mobile agent systems, but is an agent system that can provide the autonomy to mobile agents. MAT tries to support new Web applications, such as the mobile computation, by autonomous and mobile agents. Mobile Thread Programming Model (MTPM), Distributed Task Plan (DTP) and Active State Space (ASS) are integral components on which MAT is constructed. Integration of these three components ...