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The virtual library in action: Collaborative international control of high-energy physics pre-print
This paper will discuss how control of the grey literature in high-energy physics pre-prints developed through a collaborative effort of librarians and physicists. It will highlight the critical steps in the development process and describe one model of a rapidly evolving virtual library for high-energy physics information. In conclusion, this paper will extend this physics model to other areas of grey literature management.
Date:
February 1, 1996
Creator:
Kreitz, P.A.; Addis, L.; Galic, H. & Johnson, T.
Object Type:
Article
System:
The UNT Digital Library
Meta-transport library user`s guide
Developing new transport protocols or protocol algorithms suffer from the complexity of the environment in which they are intended to run. Modeling techniques attempt to relieve this by simulating the environment. Our approach to promoting rapid prototyping of protocols and protocol algorithms is to provide a pre-built infrastructure that is common to all transport protocols, so that the focus is placed on the protocol-specific aspects. The Meta-Transport Library is a library of base classes that implement or abstract out the mundane functions of a protocol; new protocol implementations are derived from the base classes. The result is a fully viable transport protocol implementation, with emphasis on modularity. The collection of base classes form a {open_quotes}class-chest{close_quotes} of tools from which protocols can be developed and studied with as little change to a normal mix environment as possible. In addition to supporting protocol designers, this approach has pedagogical uses.
Date:
July 1, 1996
Creator:
Strayer, W.T.
Object Type:
Report
System:
The UNT Digital Library
Users guide to the PGAPack parallel genetic algorithm library
PGAPack is a parallel genetic algorithm library that is intended to provide most capabilities desired in a genetic algorithm package, in an integrated, seamless, and portable manner. Key features of PGAPack are as follows: Ability to be called from Fortran or C. Executable on uniprocessors, multiprocessors, multicomputers, and workstation networks. Binary-, integer-, real-, and character-valued native data types. Object-oriented data structure neutral design. Parameterized population replacement. Multiple choices for selection, crossover, and mutation operators. Easy integration of hill-climbing heuristics. Easy-to-use interface for novice and application users. Multiple levels of access for expert users. Full extensibility to support custom operators and new data types. Extensive debugging facilities. Large set of example problems.
Date:
January 1, 1996
Creator:
Levine, D.
Object Type:
Report
System:
The UNT Digital Library
Call Number, Volume 54, Number 3, Summer 1996
"Call Number, the newsletter of the School of Library and Information Sciences, University of North Texas, is distributed three times a year" (p. 2 of Vol. 53, No. 1). The periodical contains information about professors, news in the department, the school's alumni, and the schedule of classes for the following semester.
Date:
1996
Creator:
University of North Texas. School of Library and Information Sciences.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
An interactive parallel programming environment applied in atmospheric science
This article introduces an interactive parallel programming environment (IPPE) that simplifies the generation and execution of parallel programs. One of the tasks of the environment is to generate message-passing parallel programs for homogeneous and heterogeneous computing platforms. The parallel programs are represented by using visual objects. This is accomplished with the help of a graphical programming editor that is implemented in Java and enables portability to a wide variety of computer platforms. In contrast to other graphical programming systems, reusable parts of the programs can be stored in a program library to support rapid prototyping. In addition, runtime performance data on different computing platforms is collected in a database. A selection process determines dynamically the software and the hardware platform to be used to solve the problem in minimal wall-clock time. The environment is currently being tested on a Grand Challenge problem, the NASA four-dimensional data assimilation system.
Date:
December 31, 1996
Creator:
von Laszewski, G.
Object Type:
Article
System:
The UNT Digital Library
Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review
This report contains a review of the technical literature concerning the detection, location, and characterization of structural damage via techniques that examine changes in measured structural vibration response. The report first categorizes the methods according to required measured data and analysis technique. The analysis categories include changes in modal frequencies, changes in measured mode shapes (and their derivatives), and changes in measured flexibility coefficients. Methods that use property (stiffness, mass, damping) matrix updating, detection of nonlinear response, and damage detection via neural networks are also summarized. The applications of the various methods to different types of engineering problems are categorized by type of structure and are summarized. The types of structures include beams, trusses, plates, shells, bridges, offshore platforms, other large civil structures, aerospace structures, and composite structures. The report describes the development of the damage-identification methods and applications and summarizes the current state-of-the-art of the technology. The critical issues for future research in the area of damage identification are also discussed.
Date:
May 1, 1996
Creator:
Doebling, S. W.; Farrar, C. R.; Prime, M. B. & Shevitz, D. W.
Object Type:
Report
System:
The UNT Digital Library
Analytic tools for information warfare
Information warfare and system surety (tradeoffs between system functionality, security, safety, reliability, cost, usability) have many mechanisms in common. Sandia`s experience has shown that an information system must be assessed from a {ital system} perspective in order to adequately identify and mitigate the risks present in the system. While some tools are available to help in this work, the process is largely manual. An integrated, extensible set of assessment tools would help the surety analyst. This paper describes one approach to surety assessment used at Sandia, identifies the difficulties in this process, and proposes a set of features desirable in an automated environment to support this process.
Date:
May 1, 1996
Creator:
Vandewart, R.L. & Craft, R.L.
Object Type:
Article
System:
The UNT Digital Library
Information fusion for automatic text classification
Analysis and classification of free text documents encompass decision-making processes that rely on several clues derived from text and other contextual information. When using multiple clues, it is generally not known a priori how these should be integrated into a decision. An algorithmic sensor based on Latent Semantic Indexing (LSI) (a recent successful method for text retrieval rather than classification) is the primary sensor used in our work, but its utility is limited by the {ital reference}{ital library} of documents. Thus, there is an important need to complement or at least supplement this sensor. We have developed a system that uses a neural network to integrate the LSI-based sensor with other clues derived from the text. This approach allows for systematic fusion of several information sources in order to determine a combined best decision about the category to which a document belongs.
Date:
August 1, 1996
Creator:
Dasigi, V.; Mann, R.C. & Protopopescu, V.A.
Object Type:
Article
System:
The UNT Digital Library
Defense Technical Information Center thesaurus
This DTIC Thesaurus provides a basic multidisciplinary subject term vocabulary used by DTIC to index and retrieve scientific and technical information from its various data bases and to aid DTIC`s users in their information storage and retrieval operations. It includes an alphabetical posting term display, a hierarchy display, and a Keywork Out of Context (KWOC) display.
Date:
October 1, 1996
Creator:
Dickert, J.H.
Object Type:
Report
System:
The UNT Digital Library
Library CD-ROM LAN Performance and Patron Use: a Computer Simulation Model
In this study, a computer simulation model for library CD-ROM LAN systems was created. Using this model, the system optimization problems were examined. The simulation model imitated the process of the actual decision variables changing their values and generated the corresponding results. Under a certain system environment, if the values of decision variables are changing, the system performances are getting changed also. This study investigated these relationships with the created model. The system users' interarrival time, service time, and other relevant data were collected on randomly selected days in a university library. For data collection, both of the observation and the system automatic metering software were used. According to the collected data, a discrete events simulation model was created with GPSS/H. The simulation model was proven valid and accurate by a pilot test and by the calculation with queuing theory. Statistical tests were used for data comparison and analysis. In addition, animation technique was used to show the simulation process by using Proof Animation. By this technique, the simulation process was monitored on the screen.
Date:
May 1996
Creator:
Xia, Hong
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Chemical Information Bulletin, Volume 48, Number 3, Summer 1996
Periodic supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the American Chemical Society (ACS) Division of Chemical Literature.
Date:
Summer 1996
Creator:
American Chemical Society. Division of Chemical Information.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Chemical Information Bulletin, Volume 48, Number 1, January 1996
Periodic supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the American Chemical Society (ACS) Division of Chemical Literature.
Date:
January 1996
Creator:
American Chemical Society. Division of Chemical Information.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Chemical Information Bulletin, Volume 48, Number 2, Spring 1996
Periodic supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the American Chemical Society (ACS) Division of Chemical Literature.
Date:
Summer 1996
Creator:
American Chemical Society. Division of Chemical Information.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Data zooming--a new physics for information navigation
This research project used Pad++, a user interface originally developed by Jim Holland. The objective was to explore the utility of that user interface to large databases of information such as those found on the World Wide Web. A web browser based on Pad++ was developed in the first year of this project The first year results, including the human factors were documented in a video and were presented at a SNL-wide seminar. The second year of this research project focused on applying the results of the first year research. The work in the second year involves using Pad++ as a basis for tools to manage large complicated web sites. Pad++ is ideally suited to this complex activity. A prototype was developed, which presents Web relationships in 3D hyperspace, following research from the Geometry Center at the University of Minnesota. Various human factors studies were completed, which indicate Pad++ web browsers allow users to comprehend 23% faster than when using Netscape.
Date:
December 1, 1996
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Risk-based assessment of the surety of information systems
When software is used in safety-critical, security-critical, or mission-critical situations, it is imperative to understand and manage the risks involved. A risk assessment methodology and toolset have been developed which are specific to software systems and address a broad range of risks including security, safety, and correct operation. A unique aspect of this methodology is the use of a modeling technique that captures interactions and tradeoffs among risk mitigators. This paper describes the concepts and components of the methodology and presents its application to example systems.
Date:
July 1, 1996
Creator:
Jansma, R. M.; Fletcher, S. K.; Murphy, M. D.; Lim, J. J. & Wyss, G. D.
Object Type:
Report
System:
The UNT Digital Library
Spent nuclear fuel project high-level information management plan
This document presents the results of the Spent Nuclear Fuel Project (SNFP) Information Management Planning Project (IMPP), a short-term project that identified information management (IM) issues and opportunities within the SNFP and outlined a high-level plan to address them. This high-level plan for the SNMFP IM focuses on specific examples from within the SNFP. The plan`s recommendations can be characterized in several ways. Some recommendations address specific challenges that the SNFP faces. Others form the basis for making smooth transitions in several important IM areas. Still others identify areas where further study and planning are indicated. The team`s knowledge of developments in the IM industry and at the Hanford Site were crucial in deciding where to recommend that the SNFP act and where they should wait for Site plans to be made. Because of the fast pace of the SNFP and demands on SNFP staff, input and interaction were primarily between the IMPP team and members of the SNFP Information Management Steering Committee (IMSC). Key input to the IMPP came from a workshop where IMSC members and their delegates developed a set of draft IM principles. These principles, described in Section 2, became the foundation for the recommendations found in …
Date:
September 13, 1996
Creator:
Main, G.C.
Object Type:
Report
System:
The UNT Digital Library
Statistical methods of combining information: Applications to sensor data fusion
This paper reviews some statistical approaches to combining information from multiple sources. Promising new approaches will be described, and potential applications to combining not-so-different data sources such as sensor data will be discussed. Experiences with one real data set are described.
Date:
December 31, 1996
Creator:
Burr, T.
Object Type:
Article
System:
The UNT Digital Library
Radioanalytical technology for 10 CFR Part 61 and other selected radionuclides: Literature review
A comprehensive literature review and assessment was conducted to identify and evaluate radioanalytical technology and procedures used for measuring 10CFR61 radionuclides and other long-lived isotopes. This review evaluated radiochemical procedures currently in use at a number of laboratories in the US, as well as identifying new advanced methods and techniques which could be adapted for routine radiochemical analyses of low-level radioactive waste. The 10CFR61 radionuclides include {sup 14}C, {sup 60}Cl, {sup 59,63}Ni, {sup 90}Sr, {sup 94}Nb, {sup 99}Tc, {sup 129}I, {sup 137}Cs, and TRU isotopes with half lives greater than 5 years. Other low-level radionuclides of interest include {sup 7,10}Be, {sup 26}Al, {sup 36}Cl, {sup 93}Mo, {sup 109,113m}Cd, and {sup 121m,126}Sn, which may be present in various types of waste streams from nuclear power stations.
Date:
March 1996
Creator:
Thomas, C. W.; Thomas, V. W. & Robertson, D. E.
Object Type:
Report
System:
The UNT Digital Library
Volatility literature of chlorine, iodine, cesium, strontium, technetium, and rhenium; technetium and rhenium volatility testing
A literature review pertaining to the volatilization of Sr, Cs, Tc (and its surrogate Re), Cl, I and other related species during the vitrification of Hanford Low Level Waste (LLW) streams has been performed and the relevant information summarized. For many of these species, the chemistry which occurs in solution prior to the waste stream entering the melter is important in dictating their loss at higher temperatures. In addition, the interactive effects between the species being lost was found to be important. A review of the chemistries of Tc and Re was also performed. It was suggested that Re would indeed act as an excellent surrogate for Tc in non-radioactive materials testing. Experimental results on Tc and Re loss from sodium aluminoborosilicate melts of temperatures ranging from 900--1350{degrees}C performed at PNL are reported and confirm that Re behaves in a nearly identical manner to that of technetium.
Date:
March 1, 1996
Creator:
Langowski, M. H.; Darab, J. G. & Smith, P. A.
Object Type:
Report
System:
The UNT Digital Library
Scaling of material properties for Yucca Mountain: literature review and numerical experiments on saturated hydraulic conductivity
A review of pertinent literature reveals techniques which may be practical for upscaling saturated hydraulic conductivity at Yucca Mountain: geometric mean, spatial averaging, inverse numerical modeling, renormalization, and a perturbation technique. Isotropic realizations of log hydraulic conductivity exhibiting various spatial correlation lengths are scaled from the point values to five discrete scales through these techniques. For the variances in log{sub 10} saturated hydraulic conductivity examined here, geometric mean, numerical inverse and renormalization adequately reproduce point scale fluxes across the modeled domains. Fastest particle velocities and dispersion measured on the point scale are not reproduced by the upscaled fields. Additional numerical experiments examine the utility of power law averaging on a geostatistical realization of a cross-section similar to the cross-sections that will be used in the 1995 groundwater travel time calculations. A literature review on scaling techniques for thermal and mechanical properties is included. 153 refs., 29 figs., 6 tabs.
Date:
August 1, 1996
Creator:
McKenna, S.A. & Rautman, C.A.
Object Type:
Report
System:
The UNT Digital Library
Information systems and technology transfer programs on geothermal energy and other renewable sources of energy
In order to remain competitive, it is necessary to stay informed and use the most advanced technologies available. Recent developments in communication, like the Internet and the World Wide Web, enormously facilitate worldwide data and technology transfer. A compilation of the most important sources of data on renewable energies, especially geothermal, as well as lists of relevant technology transfer programs are presented. Information on how to gain access to, and learn more about them, is also given.
Date:
January 1, 1996
Creator:
Lippmann, M.J. & Antunez, E.
Object Type:
Article
System:
The UNT Digital Library
Characterization of radionuclide-chelating agent complexes found in low-level radioactive decontamination waste. Literature review
The US Nuclear Regulatory Commission is responsible for regulating the safe land disposal of low-level radioactive wastes that may contain organic chelating agents. Such agents include ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), picolinic acid, oxalic acid, and citric acid, and can form radionuclide-chelate complexes that may enhance the migration of radionuclides from disposal sites. Data from the available literature indicate that chelates can leach from solidified decontamination wastes in moderate concentration (1--100 ppm) and can potentially complex certain radionuclides in the leachates. In general it appears that both EDTA and DTPA have the potential to mobilize radionuclides from waste disposal sites because such chelates can leach in moderate concentration, form strong radionuclide-chelate complexes, and can be recalcitrant to biodegradation. It also appears that oxalic acid and citric acid will not greatly enhance the mobility of radionuclides from waste disposal sites because these chelates do not appear to leach in high concentration, tend to form relatively weak radionuclide-chelate complexes, and can be readily biodegraded. In the case of picolinic acid, insufficient data are available on adsorption, complexation of key radionuclides (such as the actinides), and biodegradation to make definitive predictions, although the available data indicate that picolinic acid can chelate certain …
Date:
March 1, 1996
Creator:
Serne, R. J.; Felmy, A. R.; Cantrell, K. J.; Krupka, K. M.; Campbell, J. A.; Bolton, H., Jr. et al.
Object Type:
Report
System:
The UNT Digital Library
Conversations on the Uses of Science and Technology
Access:
Use of this item is restricted to the UNT Community
A candid and often humorous discussion between Hackerman and Ashworth on the problems scientists and society will face with reductions in government financial support for research, or with restrictive government directives. In dialogue that is accessible to laymen and policy makers, the authors explain why scientific research must be allowed to continue unfettered and undirected if humankind is to accrue its full benefits. "In the United States, the universities are the sole source of scientists and engineers . . . That alone should tell our political leaders . . . how essential it is for them to provide support for the universities in order to generate and promote economic development and vitality. The universities provide the adequately educated scientists and engineers, and without them a society does not have the slightest chance—short of accidentally running across a diamond mine or gold mine or another thirty trillion barrels of oil—of remaining in the economic race."
Date:
September 1996
Creator:
Hackerman, Norman & Ashworth, Kenneth
Object Type:
Book
System:
The UNT Digital Library
Providing Internet access to Los Alamos National Laboratory technical reports: A case history in providing public access to previously restricted documents
The Los Alamos National Laboratory (LANL) Research Library recently fulfilled a strategic goal of providing worldwide desktop access via the Internet to full-image files of the complete unclassified holdings of Los Alamos technical reports in its Report Collection. This effort began in late 1994 with the scanning of paper and microfiche format reports. Concurrently, the Research Library helped to initiate shifting the model for publishing new technical reports from paper to electronic; the files could then be directly mounted on the Research Library`s Web server. Providing desktop access to these reports was instrumental in expediting the development of internal policies that would better define what documents, previously restricted to the general public, could be publicly released. Undoubtedly, the most significant category of such reports were previously classified reports that had been declassified, but had not gone through a further review for public release. Collaboration with LANL`s Classification Group led to approval for public release of 97% of these reports. The LANL Research Library`s Web site now offers unique and unprecedented access to the world of a huge body of technical reports never available before anywhere in any form. This paper discusses the issues and steps involved in this achievement.
Date:
December 31, 1996
Creator:
Collins, K.A.
Object Type:
Article
System:
The UNT Digital Library