Physical Sciences and Mathematics Commons^™

The Implementation Of Dassf Otcl Apis, Hongxia Quan

Dartmouth College Undergraduate Theses

As an extension of Tcl, Otcl provides basic functionality for object-oriented programming in scripting language Tcl. We implemented the Otcl APIs for DaSSF (a parallel simulator software written in C++ at Dartmouth College) using Tclcl software package written in University of California at Berkeley. This document discussed the issues involved in the implementation, especially the communications between C++ objects and Otcl objects required by DaSSF and the naming problems.

Ismis: A Military Transportation Decision-Support Framework, Stephen Goodman, Jens G. Pohl

Collaborative Agent Design (CAD) Research Center

This paper discusses the challenges that the Information Revolution poses to transportation planning, execution and training in the US military services. Attention is drawn to the opportunities provided by global connectivity and the manner in which these opportunities can be applied to advantage in an integrated, collaborative, decision-support framework. The characteristics of military deployment operations are discussed in respect to system requirements such as parallel activities, internal representation of information (rather than data), intelligent assistance, and the integration of planning, execution and training functions.

The Integrated Strategic Mobility Interface System (ISMIS) is described as a framework that is designed to …

The Feasibility Of Data Whitening To Improve Performance Of Weather Radar, A. C. Koivunen, Alexander Kostinski

Department of Physics Publications

The problem of efficient processing of correlated weather radar echoes off precipitation is considered. An approach based on signal whitening was recently proposed that has the potential to significantly improve power estimation at a fixed pulse repetition rate/scan rate, or to allow higher scan rates at a given level of accuracy. However, the previous work has been mostly theoretical and subject to the following restrictions: 1) the autocorrelation function (ACF) of the process must be known precisely and 2) infinite signal-to-noise ratio is assumed. Here a computational feasibility study of the whitening algorithm when the ACF is estimated and in …

A Multilevel Secure Workflow Management System, Myong H. Kang, Judith N. Froscher, Amit P. Sheth, Krzysztof J. Kochut, John A. Miller

Kno.e.sis Publications

The Department of Defense (DoD) needs multilevel secure (MLS) workflow management systems to enable globally distributed users and applications to cooperate across classification levels to achieve mission critical goals. An MLS workflow management system that allows a user to program multilevel mission logic, to securely coordinate widely distributed tasks, and to monitor the progress of the workflow across classification levels is required. In this paper, we present a roadmap for implementing MLS workflows and focus on a workflow builder that is a graphical design tool for specifying such workflows.

Self-Focusing, Channel Formation, And High-Energy Ion Generation In Interaction Of An Intense Short Laser Pulse With A He Jet, G.S. Sarkisov, B. Yu. Bychenkov, V.N. Novikov, V.T. Tikhonchuk, Anatoly Maksimchuk, Shouyuan Chen, R. Wagner, G. Mourou, Donald Umstadter

Donald Umstadter Publications

Using interferometry, we investigate the dynamics of interaction of a relativistically intense 4-TW, 400-fs laser pulse with a He gas jet. We observe a stable plasma channel 1 mm long and less than 30 μm in diameter, with a radial gradient of electron density ∼5×10²² cm^-4 and with an on-axis electron density approximately ten times less than its maximum value of 8×10¹⁹ cm^-3. A high radial velocity of the surrounding gas ionization of ∼3.8×10⁸ cm/s has been observed after the channel formation, and it is attributed to the fast ions expelled from the laser …

Table Of Contents Volume 10, Number Three, Summer 1999, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Table of contents for the journal RISK: Health, Safety & Environment (ISSN: 1073-8673)

A Process Model Of Risk Communication: The Case Of Global Climate Change, Fiona Clark, Keith R. Stamm, Paula Reynolds Eblacas

RISK: Health, Safety & Environment (1990-2002)

The authors describe a survey of public media use as it relates to different stages of awareness and concern regarding risk issues.

A Model Of Organizational Responsiveness To Stakeholders, Caron Chess

RISK: Health, Safety & Environment (1990-2002)

Dr. Chess explores the relationship between risk management and risk communication and its affect on an organization/stakeholder relationship.

Influence Of Nitrogen Rate And Sampling Date On Soil Analysis Values Of Highbush Blueberries, John R. Clark, Ronald W. Mcnew, Richard C. Maples

AAES Research Reports and Research Bulletins

Three studies were conducted on nitrogen (N) fertilization effects on soil of highbush blueberries in Arkansas. Objectives included: 1) determination of varying N rate effects on the standard soil analysis variables, 2) determination of date of soil sampling effects on soil analyses, 3) evaluation of the interactions of N rate and time of sampling, and 4) determination of changes in soil content over years. This research was done in two of the more important highbush blueberry production areas in Arkansas: the Arkansas River Valley where blueberries are grown on sandy loam soils, and northwest Arkansas where production is more common …

Final Environmental Impact Statement: Ferron Natural Gas Project, United States Department Of The Interior, Bureau Of Land Management, Utah, Usda Forest Service, Utah Division Of Oil, Gas, And Mining

Elusive Documents

Anadarko Petroleum Corporation, Chandler and Associates, LLC, and Texaco Exploration and Production, Inc. propose to develop two separate areas northeast and southwest of Price, Utah and extract natural gas. Questar Pipeline Company proposes to develop a new natural gas transmission pipeline as part of the Proposed Action. With the pipeline corridor, the Proposed Action encompasses a total of about 111 ,781 acres. The developments would involve drilling a maximum of 285 natural gas wells on Federal, State and private lands, constructing roads and gathering pipelines for natural gas and produced water, drilling wells for disposing of produced water, and construction …

The John Muir Newsletter, Summer 1999, The John Muir Center For Regional Studies

Muir Center Newsletters (1981-2015)

NEW Reconstructing John Muir's First Public Lecture, Sacramento, 1876 by Steve Pauly, Pleasant Hill, California (Editor's Note: This is the third section of Steve Mauley's article which began with the Winter issue.) rock about two miles west of Lake Tenaya has a train of boulders derived from it. The boulders are scattered along a level ridge, where they have not ben disturbed in any appreciable degree since they came to rest toward the close of a glacial period. An examination of the rock proves conclusively that not only were they - rnany of which are twelve feet in diameter - …

Interactions Between Bicrystal Josephson Junctions In A Multilayer Structure, H.Q. Li, R.H. Ono, L.R. Vale, D.A. Rudman, Sy_Hwang Liou

Sy-Hwang Liou Publications

We have fabricate and studied a variety of devices based on stacked YBa₂Cu₃O_x bicrystal Josephson junctions in a multilayer structure. The proximity of the junctions in the two layers produces a large number of effects based on interactions between the junctions. Voltage locking and current locking were observed in the stacked junctions. The voltage locking is due to the ac path provided by a SrTiO₃ layer between the stacked junctions. The current locking is likely the result of a Josephson vortex interaction.

Parallel Dassf Discrete-Event Simulation Without Shared Memory, James D. Chalfant

Dartmouth College Undergraduate Theses

The Dartmouth implementation of the Scalable Simulation Framework (DaSSF) is a discrete-event simulator used primarily in the simulation of networks. It achieves high performance through parallel processing. DaSSF 1.22 requires shared memory between all processors in order to operate. This limits the number of processors available and the hardware platforms that can exploit parallelism. We are interested in extending parallel DaSSF operation to architectures without shared memory. We explore the requirements of this by implementing parallel DaSSF using MPI as the sole form of interaction between processors. The approaches used to achieve this can be abstracted and applied to the …

Two Algorithms For Performing Multidimensional, Multiprocessor, Out-Of-Core Ffts, Lauren M. Baptist

Dartmouth College Undergraduate Theses

We show two algorithms for computing multidimensional Fast Fourier Transforms (FFTs) on a multiprocessor system with distributed memory when problem sizes are so large that the data do not fit in the memory of the entire system. Instead, data reside on a parallel disk system and are brought into memory in sections. We use the Parallel Disk Model for implementation and analysis. The first method is a straightforward out-of-core variant of a well-known method for in-core, multidimensional FFTs. It performs 1-dimensional FFT computations on each dimension in turn. This method is easy to generalize to any number of dimensions, and …

Improved Computer Detection And Mapping Of Cerebral Oxygenation, David H. Kung

Dartmouth College Undergraduate Theses

Near-infrared (NIR) optical image reconstruction that incorporates blood oxygen level dependant (BOLD) magnetic resonance imaging has the potential to improve both quantifiable measurement of oxygenation and the spatial resolution involved in such mapping. My thesis continues some preliminary work in this area through development of an analytic diffusion parameter estimation algorithm for use with a NIR imaging array and development of a finite element mesh utility to read a priori BOLD images and tag them with property elements for NIR image resolution improvement.

Investigating Measures For Pairwise Document Similarity, Jeffrey D. Isaacs

Dartmouth College Undergraduate Theses

The need for a more effective similarity measure is growing as a result of the astonishing amount of information being placed online. Most existing similarity measures are defined by empirically derived formulas and cannot easily be extended to new applications. We present a pairwise document similarity measure based on Information Theory, and present corpus dependent and independent applications of this measure. When ranked with existing similarity measures over TREC FBIS data, our corpus dependent information theoretic similarity measure ranked first.

One Giant Leap. Review Of: Consilience: The Unity Of Knowledge By Edward O. Wilson, Robert Costanza

Institute for Sustainable Solutions Publications and Presentations

Book review of Consilience: The Unity of Knowledge. Edward O. Wilson. Knopf, New York, 1998.

Considerations For An Effective Telecommunications-Use Policy, Michael E. Whitman, Anthony M. Townsend, Robert J. Aalberts

Faculty Articles

Recent changes in federal telecommunications legislation have underscored the importance of an up-to-date and effective telecommunications-use policy in business organizations. With the proliferation of the Internet, intranets, and email as commonplace business tools, the potential for misuse and subsequent liability has become an increasing concern. Even though the recent Supreme Court decision struck down the obscenity provisions of the Communications Decency Act (CDA), it left intact legislation that effectively mandates development of a sound telecommunications-use policy. In addition to potential liability for systems misuse, organizations have also had to address issues of individual employee privacy within the new systems.

This …

Photochemistry And Pinhole Photography: An Interdisciplinary Experiment, Angeliki A. Rigos, Kevin Salemme

Visual & Performing Arts Faculty Publications

This interdisciplinary activity combines chemistry and art through the construction and use of a pinhole camera. We focused on the chemistry of the black and white photographic process as the science component of this activity. The reactions involved are good examples of photochemistry and multiphase chemical reactions, since the light sensitive materials (silver halides) are in the form of a gelatin emulsion of microscopic crystals.

Fast Out-Of-Core Sorting On Parallel Disk Systems, Matthew D. Pearson

Dartmouth College Undergraduate Theses

This paper discusses our implementation of Rajasekaran's (l,m)-mergesort algorithm (LMM) for sorting on parallel disks. LMM is asymptotically optimal for large problems and has the additional advantage of a low constant in its I/O complexity. Our implementation is written in C using the ViC* I/O API for parallel disk systems. We compare the performance of LMM to that of the C library function qsort on a DEC Alpha server. qsort makes a good benchmark because it is fast and performs comparatively well under demand paging. Since qsort fails when the swap disk fills up, we can only compare these algorithms …

A Cooperative Effort By The U.S. Fish And Wildlife Service, The Nez Perce Tribe, The National Park Service, And Usda Wildlife Services

Rocky Mountain Wolf Recovery: Annual Reports

Gray wolf populations (Canis lupus) were extirpated from the western U.S. by the 1930s. Subsequently, wolves from Canada occasionally dispersed south into Montana and Idaho but failed to survive long enough to reproduce. Public attitudes toward predators changed and wolves received legal protection with the passage of the Endangered Species Act (ESA) in 1973. Wolves began to successfully recolonize northwestern Montana in the early 1980s. By 1995, 6 packs lived entirely in northwestern Montana. In 1995 and 1996, 66 wolves from southwestern Canada were reintroduced to Yellowstone National Park (YNP) (31 wolves) and central Idaho (35 wolves). The …

The Probe, Issue 201 – June 1999

The Probe: Newsletter of the National Animal Damage Control Association

Reflections On NADCA's Two Decades -- Robert M. Timm, PROBE Editor
Video review: "Whitetails at the Crossroads" Northeast Deer Technical Committee, Griff en Productions (produced with a grant from Wildlife Restoration Funds, U.S. Fish and Wildlife Service). 1996. 30 minutes.
Coyote Subdued in Central Park, New York
Supplement: The insert in this issue is a retrospective, gleaned from the 100+ issues of THE PROBE that 'Fitz' composed and published. For some of you long-time NADCA members, this will bring back memories and recollections of the issues of the 80s, as the federal ADC agency (and all ADC practitioners) struggled to …

In Search Of Greener Pastures: The San Francisco Bay Area Environmental Technology Industry, Richard Castaldi, Murray Silverman, Sanjit Sengupta

IIMB Management Review

In the emerging US environmental technology industry, firms in the San Francisco Bay Area arguably have the best potential to attain global stature as a centre of environmental excellence. Among the unique strengths that give the Bay Area its leading edge are its well developed hightechnology base, its world class research universities and its vigilant environmental groups. The Bay Area environmental technology firms, with their strong export orientation, are in a position to capitalise on the prevailing economic climate of liberalisation in South Asia. These countries, in turn, can benefit from their expertise, particularly in solid waste management. However, the …

The Prairie Naturalist Volume 31, No.2 June 1999

The Prairie Naturalist

SPATlAL VARIATION IN POPULATION CHARACTERISTICS OF SHOVELNOSE STURGEON IN THE KANSAS RIVER ▪ M. C. Quist and C. S. Guy

INFLUENCE OF FIRE AND TRAPPING EFFORT ON GROUND BEETLES IN A RECONSTRUCTED TALLGRASS PRAIRIE ▪ K. J. Larsen and J. B. Williams

FISH ASSEMBLAGES AND HABITAT RELATIONSHIPS IN A SMALL NORTHERN GREAT PLAINS STREAM ▪ C. A. Barfoot and R. G. White

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA 1998 ▪ R. N. Randall

NEW RECORDS OF THE PYGMY SHREW IN SOUTHEAST SOUTH DAKOTA ▪ C. B. King, G. M. Wilson, and P. D. Sudman

BUFFLEHEAD BROOD IN NORTHEASTERN SOUTH DAKOTA …

The Probe, Issue 201 - June 1999

The Probe: Newsletter of the National Animal Damage Control Association

CONTENTS:
GENESIS
THE SECRETARY'S DECISION
PROBING FOR THE PROBE
THE BLACK DEATH
COMPLAINTS
OL'TIMER'S CORNER
BATS IN THE BELFRY?
IT IS NICE TO KNOW YOUR ARE NOT ALONE!!!
ADOPT A 1080 STATION
LETTERS TO YE ED
GOOD GNUS FOR EWES
MEMBERSHIP
ANIMAL RIGHTS
A LAST PLEA FOR MEMBERS
KISSED BY A RAT
EXECUTIVE BOARD MEETING - Sept. 21. 1985
HUNTERS BEWARE
ON BEING MASOCHISTIC
EPA DOUBLE TALK
IN THE CAT HOUSE - - AGAIN ? !
CATS AND MORE CATS
ON ADC'S TRANSFER TO USDA
AHH! A KINDRED SPIRIT
MONTEREY PEST CONF.
HUMANS GOT RIGHTS???
THAT SMARTS!
ALL THE NEWS …

Multiple Isotopic Studies Of Calcium Carbonate Growths In Concrete Structures, Danielle M. Schmitt

Masters Theses

Secondary minerals, predominantly carbonates, forming under concrete structures have received attention in terms of their possible role in the degradation of their hosts. δ¹³C and δ¹⁸O analyses of several calcium carbonate growths collected from bridges in Michigan and New York were performed. The δ¹³C and δ¹⁸O values clustered around -24.7 ± 1(PDB) and 13.7 ± 1(SMOW) ‰, respectively. A positive δ¹⁸O- δ¹³C correlation suggests kinetically driven precipitation involving atmospheric CO2• ¹⁴C activities determined for select samples support the theory that atmospheric CO₂ is involved …

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 15, Number 6, June 1999, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

An eight page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Sketch-Based Image Queries In Topographic Databases, James Carswell

Articles

In this paper we present the development of a system prototype for sketch-based queries for the content-based retrieval of digital images from topographic databases. We discuss our overall strategy and associated algorithmic and implementation aspects, and present associated database design issues. The query tools devised in this research are employing user-provided sketches of the shape and spatial configuration of the object(s) which should appear in the images to be retrieved. Our matching tool is inspired by least-squares matching (lsm), and represents an extension of lsm to function with a variety of raster representations. Our strategy makes use of a hierarchical …

Overview: Nonlinear Dynamics Related To Polymeric Systems, Irving R. Epstein, John A. Pojman

Faculty Publications

No abstract provided.

Period-Doubling Behavior In Frontal Polymerization Of Multifunctional Acrylates, Jonathan Masere, Felicia Stewart, Timothy Meehan, John A. Pojman

Faculty Publications

Front dynamics in the frontal polymerization of two multifunctional acrylate monomers, 1,6-hexanediol diacrylate (HDDA) and trimethylolpropane ethoxylate triacrylate (TMPTA), with Lupersol 231 [1,1-di(t-butylperoxy)-3,3,5-trimethylcyclohexane] as the initiator, are studied. In most frontal polymerization systems, the dynamics are associated with a planar front propagating through the sample. However, in some cases, front behavior can be altered: the front becomes nonplanar characterized by complex patterns like spin modes and pulsations. To determine how these periodic and aperiodic modes arise, reactant solutions consisting of HDDA diluted with diethyl phthalate (DEP) and TMPTA diluted with dimethyl sulfoxide (DMSO) were used in the study. …