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1997

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Pattern And Process In Biological Invasion, Diane L. Larson Jan 1997

Pattern And Process In Biological Invasion, Diane L. Larson

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

A cohesive theory of biological invasion has been frustratingly elusive. If nothing else, Mark Williamson's book, Biological Invasions, has convinced me of the futility in looking for broad patterns among the widely disparate creatures that have invaded almost every conceivable environment.

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Analysis Of Environmental Data With Censored Observations, Shiping Liu, Jye-Chyi Lu, Dana Kolpin, William Meeker Jan 1997

Analysis Of Environmental Data With Censored Observations, Shiping Liu, Jye-Chyi Lu, Dana Kolpin, William Meeker

United States Geological Survey: Staff Publications

The potential threats to humans and to terrestrial and aquatic ecosystems from environmental contamination could depend on the sum of the concentrations of different chemicals. However, direct summation of environmental data is not generally feasible because it is common for some chemical concentrations to be recorded as being below the analytical reporting limit. This creates special problems in the analysis of the data. A new model selection procedure, named forward censored regression, is introduced for selecting an appropriate model for environmental data with censored observations. The procedure is demonstrated using concentrations of atrazine (2-chloro- 4-ethylamino-6-isopropylamino-s-triazine), deethylatrazine (DEA, 2-amino-4-chloro-6-isopropylamino-s-triazine), and deisopropylatrazine …

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School Of Computer And Information Sciences Master Of Science Degree Programs 1997, Nova Southeastern University Jan 1997

School Of Computer And Information Sciences Master Of Science Degree Programs 1997, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

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Doctoral Degree Programs School Of Computer And Information Science 1997, Nova Southeastern University Jan 1997

Doctoral Degree Programs School Of Computer And Information Science 1997, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

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1997 Firebrand, University Archives, Dominican University Of California Jan 1997

1997 Firebrand, University Archives, Dominican University Of California

Yearbooks 1990 - 1999

No abstract provided.

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Quick Computation Of Spatial Autoregressive Estimators, R. Kelley Pace, Ronald Barry Jan 1997

Quick Computation Of Spatial Autoregressive Estimators, R. Kelley Pace, Ronald Barry

Faculty Publications

Spatial estimators usually require the manipulation of n2 relations among n observations and use operations such as determinants, eigenvalues, and inverses whose operation counts grow at a rate proportional to n3. This paper provides ways to quickly compute estimates when the dependent variable follows a spatial autoregressive process, which by appropriate specification of the independent variables can subsume the case when the errors follow a spatial autoregressive process. Since only nearby observations tend to affect a given observation, most observations have no effect and hence the spatial weight matrix becomes sparse. By exploiting sparsity and rearranging computations, …

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Model-Driven Simulation Of World-Wide-Web Cache Policies, Ying Shi, Edward Watson, Ye Sho Chen Jan 1997

Model-Driven Simulation Of World-Wide-Web Cache Policies, Ying Shi, Edward Watson, Ye Sho Chen

Faculty Publications

The World Wide Web (WWW) has experienced a dramatic increase in popularity since 1993. Many reports indicate that its growth will continue at an exponential rate. This growth has created a tremendous increase in network loads and user response times. The complexity and diversity of many WWW documents (e.g., texts, images, video, audio, etc.) and the diversity of user requested WWW information require sophisticated WWW cache management strategies. Several popular WWW cache algorithms perform rather poorly and lack mathematical or empirical foundations. As a result, WWW system administrators and browser users are forced to arbitrarily define certain important cache parameters. …

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William Porcher Dubose : The Life And Work Of A Southern Theologian / By John William Richter Iii, John William Richter Jan 1997

William Porcher Dubose : The Life And Work Of A Southern Theologian / By John William Richter Iii, John William Richter

Electronic Theses and Dissertations

No abstract provided.

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Preparing Physics Majors For Secondary-Level Teaching: The Education Concentration In The Haverford College Physics Program, Lyle D. Roelofs Jan 1997

Preparing Physics Majors For Secondary-Level Teaching: The Education Concentration In The Haverford College Physics Program, Lyle D. Roelofs

Physics Faculty Scholarship

No abstract provided.

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Computation Of Higher Order Modes In Dielectric Resonators Using Finite Difference Time Domain Technique, Asem Mokaddem Jan 1997

Computation Of Higher Order Modes In Dielectric Resonators Using Finite Difference Time Domain Technique, Asem Mokaddem

Electronic Theses and Dissertations

No abstract provided.

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Andrew Lytle, Wendell Berry And Agrarian Social Criticism : The Implicit And Explicit Ecological Land Ethic Of Agriculture, Joseph Benjamin Borden Jan 1997

Andrew Lytle, Wendell Berry And Agrarian Social Criticism : The Implicit And Explicit Ecological Land Ethic Of Agriculture, Joseph Benjamin Borden

Electronic Theses and Dissertations

No abstract provided.

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A Million Dollars In Concrete And Steel : Federal Aid To The University Of Mississippi In The New Deal Era, Davis Douglas Buchanan Jan 1997

A Million Dollars In Concrete And Steel : Federal Aid To The University Of Mississippi In The New Deal Era, Davis Douglas Buchanan

Electronic Theses and Dissertations

No abstract provided.

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An Analysis Of The Favorability Of Ethnic Image, Juliet Sinyen Cheng Jan 1997

An Analysis Of The Favorability Of Ethnic Image, Juliet Sinyen Cheng

Electronic Theses and Dissertations

No abstract provided.

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From Horse Hooves To Tank Treads : The American Transition, 1917-1918, Gregory Mercelis Parrish Jan 1997

From Horse Hooves To Tank Treads : The American Transition, 1917-1918, Gregory Mercelis Parrish

Electronic Theses and Dissertations

No abstract provided.

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Dry River Walking, Gregory Paul Brown Jan 1997

Dry River Walking, Gregory Paul Brown

Electronic Theses and Dissertations

No abstract provided.

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Order Out Of Chaos, John Lawrence Cheatham Jan 1997

Order Out Of Chaos, John Lawrence Cheatham

Electronic Theses and Dissertations

No abstract provided.

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Zooplankton Variability And Copepod Species Assemblages From A Tropical Coastal Lagoon, J.N. Alvarez-Cadena, L. Segura-Puertas Jan 1997

Zooplankton Variability And Copepod Species Assemblages From A Tropical Coastal Lagoon, J.N. Alvarez-Cadena, L. Segura-Puertas

Gulf and Caribbean Research

Results of monthly zooplankton sampling, carried out from December 1990 to November 1991, are compared from three localities in the Mexican Caribbean. Two stations, Bojórquez, and Cuenca Norte, represent partially enclosed areas of the Nichupté Lagoon System in the northeastern region of the Yucatán Peninsula; a third station was located in adjacent neritic waters. At the neritic station, temperature was lower, salinity was higher, and variations in the two parameters smaller as compared to the two lagoon stations. Zooplankton abundance ranged from 3585.5 org./m3 at the neritic station to 18,742.7 org./m3 at Cuenca Norte. Considering all animals collected, …

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Mobile Unity: A Language And Logic For Concurrent Mobile Systems, Peter J. Mccann, Gruia-Catalin Roman Jan 1997

Mobile Unity: A Language And Logic For Concurrent Mobile Systems, Peter J. Mccann, Gruia-Catalin Roman

All Computer Science and Engineering Research

Traditionally, a distributed system has been viewed as a collection of fixed computational elements connected by a static network. Prompted by recent advances in wireless communications rechnology, the emerging field of mobile computing is challenging these assumptions by providing mobile hosts with connectivity that may change over time, raising the possibility that hosts may be called upon to operate while only weakly connected to or while completely disconnected from other hosts. We define a concurrent mobile system as one where independently executing coponents may migrate through some space during the course of the computation, and where the pattern of connectivity …

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Expressing Code Mobility In Mobile Unity, Gian Pietro Picco, Gruia-Catalin Roman, Peter J. Mccann Jan 1997

Expressing Code Mobility In Mobile Unity, Gian Pietro Picco, Gruia-Catalin Roman, Peter J. Mccann

All Computer Science and Engineering Research

Advancements in network technology have led to the emergence of new computing paradigms that challenge established programming practices by employing weak forms of consistency and dynamic forms of binding. Code mobility, for instance, allows for invocation-time binding between a code fragment and the location where it executes. Similarly, mobile computing allows hosts (and the software they execute) to alter their physical location. Despite apparent similarities, the two paradigms are distinct in their treatment of location and movement. This paper seeks to uncover a common foundation for the two paradigms by exploring the manner in which stereotypical forms of code mobility …

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Alchourron's Defeasible Conditionals And Defeasible Reasoning, Fernando Tohme, Ronald P. Loui Jan 1997

Alchourron's Defeasible Conditionals And Defeasible Reasoning, Fernando Tohme, Ronald P. Loui

All Computer Science and Engineering Research

No abstract provided.

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Learning With Unreliable Boundary Queries, Avrim Blum, Prasad Chalasani, Sally A. Goldman, Donna K. Slonim Jan 1997

Learning With Unreliable Boundary Queries, Avrim Blum, Prasad Chalasani, Sally A. Goldman, Donna K. Slonim

All Computer Science and Engineering Research

We introduce a model for learning from examples and membership queries in situations where the boundary between positive and negative examples is somewhat ill-defined. In our model, queries near the boundary of a target concept may receive incorrect or "don't care" responses, and the distribution of examples has zero probability mass on the boundary region. The motivation behind our model is that in many cases the boundary between positive and negative examples is complicated or "fuzzy." However, one may still hope to learn successfully, because the typical examples that one sees to not come from that region. We present several …

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Architectural Choices In Large Scale Atm Switches, Jonathan Turner, Naoaki Yamanaka Jan 1997

Architectural Choices In Large Scale Atm Switches, Jonathan Turner, Naoaki Yamanaka

All Computer Science and Engineering Research

The rapid development of Asynchronous Transfer Mode technology in the last 10-15 years has stimulated renewed interest in the design and analysis of switching systems, leading to new ideas for system designs and new insights into the performance and evaluation of such systems. As ATM moves closer to realizing the vision of ubiquitous broadband ISDN services, the design of switching systems takes on growing importance. This paper seeks to clarify the key architectural issues for ATM switching system design and provides a survey of the current state-of-the-art.

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Balancing Consistency And Lag In Transaction-Based Computational Steering, Eileen Kraemer, Delbert Hart, Gruia-Catalin Roman Jan 1997

Balancing Consistency And Lag In Transaction-Based Computational Steering, Eileen Kraemer, Delbert Hart, Gruia-Catalin Roman

All Computer Science and Engineering Research

Computational steering, the interactive adjustment of application parameters and allocation of resources, is a promising technique for higher-productivity simulation, finer-grained optimization of dynamically varying algorithms, and greater understanding of program behavior and the characteristics of data sets and solution spaces. Tools for computational steering must provide monitoring, visualization, and interaction facilities. In addition, these tools must address issues related to the consistency, latency, and scalability at each of these phases, and must consider the perturbation that results. In this paper we describe transaction-based components for a computational steering system and present an approach that guarantees consistent monitoring and displays, supports …

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The Programmers' Playground Application Management System User Guide, William M. Shapiro, T. Paul Mccartney, E.F. Berkley Shands Jan 1997

The Programmers' Playground Application Management System User Guide, William M. Shapiro, T. Paul Mccartney, E.F. Berkley Shands

All Computer Science and Engineering Research

Application Management permits the advertising, launching, and configuring of distributed applications created using the Programmers' Playground. Applications can be documented and made available to end-users through the use of application pages on the World Wide Web. The launching and configuring of applications is performed by a brokerage system consisting of an applicatoin broker and one or more hierarchies of module launchers. This document describes how to setup and use the components of the Application Management system.

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Computational Detection Of Cpg Islands In Dna, Eric C. Rouchka, Richard Mazzarella, David J. States Jan 1997

Computational Detection Of Cpg Islands In Dna, Eric C. Rouchka, Richard Mazzarella, David J. States

All Computer Science and Engineering Research

Regions of DNA rich in CpG dinucleotides, also known as CpG islands, are often located upstream of the transcription start side in both tissue specific and housekeeping genes. Overall, CPG dinucleotides are observed at a density of 25% the expected level from base composition alone, partially due to 5-methylcytosine decay (Bird, 1993). Since CpG dinucleotides typically occur with low frequency, CpG islands can be distinguished statistically in the genome. Our method of detecting CpG islands involves a heuristic algorithm employing classic changepoint methods and log-likelihood statistics. A Java applet has been created to allow for user interaction and visualization of …

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Compositional Programming Abstractions For Mobile Computing, Peter J. Mccann, Gruia-Catalin Roman Jan 1997

Compositional Programming Abstractions For Mobile Computing, Peter J. Mccann, Gruia-Catalin Roman

All Computer Science and Engineering Research

Recent advances in wireless networking technology and the increasing demand for ubiquitous, mobile connectivity demonstrate the importance of providing reliable systems for managing reconfiguration and disconnection of components. Design of such systems requires tools and techniques appropriate to the task. Many formal models of computation, including UNITY, are not adequate for expressing reconfiguration and disconnection and are therefore inappropriate vehicles for investigating the impact of mobility on the construction of modular and composable systems. Algebraic formalisms such as the pi-calculus have been proposed for modeling mobility. This paper addresses the question of whether UNITY, a state-based formalism with a foundation …

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Terabit Burst Switching, Jonathan S. Turner Jan 1997

Terabit Burst Switching, Jonathan S. Turner

All Computer Science and Engineering Research

This report summarizes the results of an architectural study on Terabit Burst Switching. The purpose of this study was to explore alternative architectures for very high performance switching for data communication, using a combination of optical and electronic technologies. We explore two alternative implementations of the burst switching concept in detail, one using a hybrid architecture with an electronic core, and an integrated architecture using an all optical data path. We also briefly discuss an approach using optical TDM. Our results show that using the hybrid architecture, it is feasible to construct systems with aggregate capacities of tens of terabits …

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End-User Visualization And Manipulation Of Aggregate Data, T. Paul Mccartney, Kenneth J. Goldman Jan 1997

End-User Visualization And Manipulation Of Aggregate Data, T. Paul Mccartney, Kenneth J. Goldman

All Computer Science and Engineering Research

Aggregate visualization and manipulation enables the viewing and interaction of dynamically changing data sets in a graphically meaningful way. However, off-the-shelf applications generally provide only limited ways to view aggregates. To be truly effective to the end-user, an aggregate visualization should be customizable to suit the individual's needs. This paper describes a software system that empowers end-users to create interactive aggregate visualizations through direct manipulation. Included are mechanisms for specifying how aggregate data is processed from multiple sources, providing functionality similar to project, select, join, and cross product of relational databases. Visualization of distributed data sets is emphasized.

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Eliding The Arguments Of Cases, Ronald P. Loui, Jeff Norman Jan 1997

Eliding The Arguments Of Cases, Ronald P. Loui, Jeff Norman

All Computer Science and Engineering Research

No abstract provided.

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Euphoria Reference Manual, T. Paul Mccartney, Kenneth J. Goldman Jan 1997

Euphoria Reference Manual, T. Paul Mccartney, Kenneth J. Goldman

All Computer Science and Engineering Research

EUPHORIA is a user interface management system that enables end-users to create direct manipulation graphical user interfaces (GUIs) through interactive drawing. Used in conjunction with The Programmers' Playground, a distributed programming environment, end-users can dynamically create and associate GUI components with an underlying application without programming, This document describes EUPHORIA's functionality.

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