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Final report: Efficient and user friendly C++ library for differential algebra
In Phase I we proposed the following tasks: Task 1: Identify the units of the Differential Algebra (DA) library, i.e. determine the abstract data types of the DA and the relations between them. Develop the interfaces (.h files) for the DA vectors. Task 2: Implement the DA vector class with garbage collection and expression templates for optimizing all overloaded operators by minimizing creation of temporaries and fusing loops. Task 3: Implement the prototype GUI for instantiating systems from files and invoking the DA methods. Task 4: Develop a suite of tests for the DA vector class and the needed utilities classes. Task 5: Write the final report on this work. This will include documentation on the use of the code. We have completed these tasks. In this section we discuss the results of our work.
Date:
September 29, 1998
Creator:
Shasharina, Svetlana G.
Object Type:
Report
System:
The UNT Digital Library
Information Seeking Behavior of Clergy: The Research, The Results, and the Future
This article reviews the information seeking behaviors of clergy.
Date:
June 29, 2015
Creator:
Dankasa, Jacob
Object Type:
Article
System:
The UNT Digital Library
Information Extraction from Unstructured Text for the Biodefense Knowledge Center
The Bio-Encyclopedia at the Biodefense Knowledge Center (BKC) is being constructed to allow an early detection of emerging biological threats to homeland security. It requires highly structured information extracted from variety of data sources. However, the quantity of new and vital information available from every day sources cannot be assimilated by hand, and therefore reliable high-throughput information extraction techniques are much anticipated. In support of the BKC, Lawrence Livermore National Laboratory and Oak Ridge National Laboratory, together with the University of Utah, are developing an information extraction system built around the bioterrorism domain. This paper reports two important pieces of our effort integrated in the system: key phrase extraction and semantic tagging. Whereas two key phrase extraction technologies developed during the course of project help identify relevant texts, our state-of-the-art semantic tagging system can pinpoint phrases related to emerging biological threats. Also we are enhancing and tailoring the Bio-Encyclopedia by augmenting semantic dictionaries and extracting details of important events, such as suspected disease outbreaks. Some of these technologies have already been applied to large corpora of free text sources vital to the BKC mission, including ProMED-mail, PubMed abstracts, and the DHS's Information Analysis and Infrastructure Protection (IAIP) news clippings. In …
Date:
April 29, 2005
Creator:
Samatova, N F; Park, B; Krishnamurthy, R; Munavalli, R; Symons, C; Buttler, D J et al.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Sarah Janice Kee, February 29, 1992
Access:
Use of this item is restricted to the UNT Community
Interview with Sarah Janice Kee, a library administrator and former student of Texan Women's University, then Texas State College for Women. Kee discusses her teaching career, experience studying Library Science at TWU, being a part of the Army Library Service during World War II, working as a librarian, with the ALA, and the U.S. Office of Education in Dallas, Texas.
Date:
February 29, 1992
Creator:
Dickey, Richard C. & Kee, Sarah Janice
Object Type:
Book
System:
The UNT Digital Library
Climate Change: Science Update 2007
This report summarizes highlights of new scientific research and assessments released in 2007 related to global warming.
Date:
November 29, 2007
Creator:
Leggett, Jane A.
Object Type:
Report
System:
The UNT Digital Library
Advanced Fingerprint Analysis Project Fingerprint Constituents
The work described in this report was focused on generating fundamental data on fingerprint components which will be used to develop advanced forensic techniques to enhance fluorescent detection, and visualization of latent fingerprints. Chemical components of sweat gland secretions are well documented in the medical literature and many chemical techniques are available to develop latent prints, but there have been no systematic forensic studies of fingerprint sweat components or of the chemical and physical changes these substances undergo over time.
Date:
October 29, 1999
Creator:
Mong, GM; Petersen, CE & Clauss, TRW
Object Type:
Report
System:
The UNT Digital Library
Profiling users in the UNIX os environment
This paper presents results obtained by using a method of profiling a user based on the login host, the login time, the command set, and the command set execution time of the profiled user. It is assumed that the user is logging onto a UNIX host on a computer network. The paper concentrates on two areas: short-term and long-term profiling. In short-term profiling the focus is on profiling the user at a given session where user characteristics do not change much. In long-term profiling, the duration of observation is over a much longer period of time. The latter is more challenging because of a phenomenon called concept or profile drift. Profile drift occurs when a user logs onto a host for an extended period of time (over several sessions).
Date:
September 29, 2000
Creator:
Dao, V N P; Vemuri, R & Templeton, S J
Object Type:
Article
System:
The UNT Digital Library
Technical Support Document for Version 3.6.1 of the COMcheck Software
This technical support document (TSD) is designed to explain the technical basis for the COMcheck software as originally developed based on the ANSI/ASHRAE/IES Standard 90.1-1989 (Standard 90.1-1989). Documentation for other national model codes and standards and specific state energy codes supported in COMcheck has been added to this report as appendices. These appendices are intended to provide technical documentation for features specific to the supported codes and for any changes made for state-specific codes that differ from the standard features that support compliance with the national model codes and standards.
Date:
September 29, 2009
Creator:
Bartlett, Rosemarie; Connell, Linda M.; Gowri, Krishnan; Halverson, Mark A.; Lucas, Robert G.; Richman, Eric E. et al.
Object Type:
Report
System:
The UNT Digital Library
Multiphysics simulations: challenges and opportunities.
This report is an outcome of the workshop Multiphysics Simulations: Challenges and Opportunities, sponsored by the Institute of Computing in Science (ICiS). Additional information about the workshop, including relevant reading and presentations on multiphysics issues in applications, algorithms, and software, is available via https://sites.google.com/site/icismultiphysics2011/. We consider multiphysics applications from algorithmic and architectural perspectives, where 'algorithmic' includes both mathematical analysis and computational complexity and 'architectural' includes both software and hardware environments. Many diverse multiphysics applications can be reduced, en route to their computational simulation, to a common algebraic coupling paradigm. Mathematical analysis of multiphysics coupling in this form is not always practical for realistic applications, but model problems representative of applications discussed herein can provide insight. A variety of software frameworks for multiphysics applications have been constructed and refined within disciplinary communities and executed on leading-edge computer systems. We examine several of these, expose some commonalities among them, and attempt to extrapolate best practices to future systems. From our study, we summarize challenges and forecast opportunities. We also initiate a modest suite of test problems encompassing features present in many applications.
Date:
November 29, 2012
Creator:
Keyes, D.; McInnes, L. C.; Woodward, C.; Gropp, W.; Myra, E.; Pernice, M. (Mathematics and Computer Science) et al.
Object Type:
Report
System:
The UNT Digital Library
Unclassified Computing Capability: User Responses to a Multiprogrammatic and Institutional Computing Questionnaire
We are experimenting with a new computing model to be applied to a new computer dedicated to that model. Several LLNL science teams now have computational requirements, evidenced by the mature scientific applications that have been developed over the past five plus years, that far exceed the capability of the institution's computing resources. Thus, there is increased demand for dedicated, powerful parallel computational systems. Computation can, in the coming year, potentially field a capability system that is low cost because it will be based on a model that employs open source software and because it will use PC (IA32-P4) hardware. This incurs significant computer science risk regarding stability and system features but also presents great opportunity. We believe the risks can be managed, but the existence of risk cannot be ignored. In order to justify the budget for this system, we need to make the case that it serves science and, through serving science, serves the institution. That is the point of the meeting and the White Paper that we are proposing to prepare. The questions are listed and the responses received are in this report.
Date:
January 29, 2002
Creator:
McCoy, M & Kissel, L
Object Type:
Report
System:
The UNT Digital Library
Accuracy of long-term volunteer water monitoring data: A multiscale analysis from a statewide citizen science program
Article describes study which assesses the relative accuracy of volunteer water quality data collected by the Texas Stream Team (TST) citizen science program from 1992–2016 across the State of Texas by comparing it to professional data from corresponding stations during the same time period.
Date:
January 29, 2020
Creator:
Albus, Kelly Hibbeler; Thompson, Rudi; Mitchell, Forrest; Kennedy, James H. & Ponette-González, Alexandra G.
Object Type:
Article
System:
The UNT Digital Library
Environmental Protection: EPA Needs to Ensure That Best Practices and Procedures Are Followed When Making Further Changes to Its Library Network
A letter report issued by the Government Accountability Office with an abstract that begins "Established in 1971, the Environmental Protection Agency's (EPA) library network provides staff and the public with access to environmental information. Its 26 libraries contain a wide range of information and resources and are located at headquarters, regional offices, research centers, and laboratories nationwide. In 2006, EPA issued a plan to reorganize the network beginning in fiscal year 2007. The plan proposed closing libraries and dispersing, disposing of, and digitizing library materials. GAO was asked to assess (1) the status of, and plans for, the network reorganization; (2) EPA's rationale for reorganizing the network; (3) the extent to which EPA has communicated with and solicited the views of EPA staff and external stakeholders in conducting the reorganization; (4) EPA's steps to maintain the quality of library services after the reorganization; and (5) how EPA is funding the network and its reorganization. For this study, GAO reviewed pertinent EPA documents and interviewed EPA officials and staff from each of the libraries."
Date:
February 29, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Current Beryllium Literature : A Selected Bibliography, January 1958 - August 1959
"This bibliography lists selected articles on beryllium which have appeared in journals received in the library of the Lawrence Radiation Laboratory, Livermore, California and articles, reports, and books which have appeared in the following abstracting services between January, 1958 and August 1959."
Date:
September 29, 1959
Creator:
Lane, Zanier D.
Object Type:
Report
System:
The UNT Digital Library
Pacific Northwest National Laboratory Annual Self-Evaluation Report: 2002
This report will summarize PNNL's progress toward accomplishment of the critical outcomes, objectives and performance indicators as delineated in the FY 2002 Performance Evaluation and Fee Agreement. In addition, this report will summarize PNNL's analysis of the results of the FY2002 Peer Reviews, the implementation of PNNL's FY2002 Operational Improvement Initiatives, and the resolution of the Key Areas for Improvements.
Date:
October 29, 2002
Creator:
Cuello, Robert
Object Type:
Report
System:
The UNT Digital Library
A parallel hashed oct-tree N-body algorithm
We report on an efficient adaptive N-body method which we have recently designed and implemented. The algorithm computers the forces on an arbitrary distribution of bodies in a time which scales as N log N with particle number. The accuracy of the force calculations is analytically bounded, and can be adjusted via a user defined parameter between a few percent relative accuracy, down to machine arithmetic accuracy. Instead of using pointers to indicate the topology of the tree, we identify each possible cell with a key. The mapping of keys into memory locations is achieved via a hash table. This allows us to access data in an efficient manner across multiple processors using a virtual shared memory model. Performance of the parallel program is measured on the 512 processor Intel Touchstone Delta system. We also comment on a number of wide-ranging applications which can benefit from application of this type of algorithm.
Date:
March 29, 1993
Creator:
Warren, M. S. & Salmon, J. K.
Object Type:
Article
System:
The UNT Digital Library
Nuclear data needs for non-intrusive inspection.
Various nuclear-based techniques are being explored for use in non-intrusive inspection. Their development is motivated by the need to prevent the proliferation of nuclear weapons, to thwart trafficking in illicit narcotics, to stop the transport of explosives by terrorist organizations, to characterize nuclear waste, and to deal with various other societal concerns. Non-intrusive methods are sought in order to optimize inspection speed, to minimize damage to packages and containers, to satisfy environmental, health and safety requirements, to adhere to legal requirements, and to avoid inconveniencing the innocent. These inspection techniques can be grouped into two major categories: active and passive. They almost always require the use of highly penetrating radiation and therefore are generally limited to neutrons and gamma rays. Although x-rays are widely employed for these purposes, their use does not constitute nuclear technology and therefore is not discussed here. This paper examines briefly the basic concepts associated with nuclear inspection and investigates the related nuclear data needs. These needs are illustrated by considering four of the methods currently being developed and tested.
Date:
November 29, 2000
Creator:
Smith, D. L. & Michlich, B. J.
Object Type:
Article
System:
The UNT Digital Library
Computational modeling of ultra-short-pulse ablation of enamel
A computational model for the ablation of tooth enamel by ultra-short laser pulses is presented. The role of simulations using this model in designing and understanding laser drilling systems is discussed. Pulses of duration 300 sec and intensity greater than 10{sup 12} W/cm{sup 2} are considered. Laser absorption proceeds via multi-photon initiated plasma mechanism. The hydrodynamic response is calculated with a finite difference method, using an equation of state constructed from thermodynamic functions including electronic, ion motion, and chemical binding terms. Results for the ablation efficiency are presented. An analytic model describing the ablation threshold and ablation depth is presented. Thermal coupling to the remaining tissue and long-time thermal conduction are calculated. Simulation results are compared to experimental measurements of the ablation efficiency. Desired improvements in the model are presented.
Date:
February 29, 1996
Creator:
London, R. A.; Bailey, D. S. & Young, D. A.
Object Type:
Article
System:
The UNT Digital Library
A simulation-based study of HighSpeed TCP and its deployment
The current congestion control mechanism used in TCP has difficulty reaching full utilization on high speed links, particularly on wide-area connections. For example, the packet drop rate needed to fill a Gigabit pipe using the present TCP protocol is below the currently achievable fiber optic error rates. HighSpeed TCP was recently proposed as a modification of TCP's congestion control mechanism to allow it to achieve reasonable performance in high speed wide-area links. In this research, simulation results showing the performance of HighSpeed TCP and the impact of its use on the present implementation of TCP are presented. Network conditions including different degrees of congestion, different levels of loss rate, different degrees of bursty traffic and two distinct router queue management policies were simulated. The performance and fairness of HighSpeed TCP were compared to the existing TCP and solutions for bulk-data transfer using parallel streams.
Date:
April 29, 2003
Creator:
Souza, Evandro de
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
EPA's Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act
This set of volumes is a response by the EPA to ten petitions filed to challenge the determination that climate change is real. The EPA dismisses the petitioners' claims, reiterating the evidence of anthropogenic global climate change.
Date:
July 29, 2010
Creator:
United States. Environmental Protection Agency. Office of Atmospheric Programs. Climate Change Division.
Object Type:
Text
System:
The UNT Digital Library
INEL cold test pit demonstration of improvements in information derived from non-intrusive geophysical methods over buried waste sites. Phase 2, Final report
Under Contract between US DOE Idaho National Engineering Laboratory (INEL) and the Blackhawk Geosciences Division of Coleman Research Corporation (BGD-CRC), geophysical investigations were conducted to improve the detection of buried wastes. Site characterization is a costly and time consuming process with the most costly components being drilling, sampling, and chemical analysis of samples. There is a focused effort at US DOE and other agencies to investigate methodologies that reduce costs and shorten the time between characterization and clean-up. These methodologies take the form of employing non-invasive (geophysical) and minimal invasive (e.g., cone penetrometer driving) techniques of characterization, and implementing a near real-time, rational decision-making process (Expedited Site Characterization). Over the Cold Test Pit (CTP) at INEL, data were acquired with multiple sensors on a dense grid. Over the CTP the interpretations inferred from geophysical data are compared with the known placement of various waste forms in the pit. The geophysical sensors employed were magnetics, frequency and time domain electromagnetics, and ground penetrating radar. Also, because of the high data density acquired, filtering and other data processing and imaging techniques were tested. The conclusions derived from the geophysical surveys were that pit boundaries, berms between cells within the pit, and individual …
Date:
April 29, 1994
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Continuation application for the Amarillo National Resource Center for Plutonium, a higher education consortium consisting of Texas A and M University, Texas Tech University, and the University of Texas at Austin
This report describes the 5 tasks to be covered under this project and compiles budget information. Task 1 is to establish a Plutonium Information Resource, which has been established in Amarillo, Texas. Task 2, Advisory Functions, coordinates studies and activities relating to the disposition of excess weapons-grade plutonium. Task 3, Environmental, Public Health, and Safety, supports soil remediation activities. Task 4, Education and Outreach, is supporting four programs: K--12 education improvement in science and math courses; Academic intervention to identify and encourage high ability high school and middle school students with potential to become scientists and engineers; Graduate education evaluation; and Public outreach programs. Task 5, Plutonium and other Materials Studies, is currently funding two projects for the disposition of high explosives: a feasibility study of burning a mixture of high explosives and other materials in a commercial coal-fired power plant and synthesis of diamond by shock compression of bucky ball with explosives.
Date:
June 29, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Reduction of multielement mass spectra
Even though the spectra obtained by inductively coupled plasma source spectrometry (ICP-MS) are relatively simple, their interpretation can be complicated by the presence of molecular and isobaric interferants. To the extent that isotopic abundances are known and constant, one can treat observed spectra as sums of known components. A linear decomposition approach for determining the concentrations of the components in a spectrum and correctly propagating uncertainties is presented. This technique differs from linear regression in that an exact fit is made to a subset of isotopes and goodness-of-fit is evaluated from the deviations between the predicted and measured intensities of the other, unfit isotopes. This technique can be applied to a wide range of spectral fitting problems. In this paper, its applicability to ICP-MS spectra is used to demonstrate the use and utility of the technique. 2 refs., 9 figs.
Date:
June 29, 1990
Creator:
Russ, G. P., III; Caffee, M.W.; Hudson, G.B. & Storch, N.A.
Object Type:
Report
System:
The UNT Digital Library
Publications, Presentations, and Awards (ORNL/CDIAC-101)
None
Date:
January 29, 2002
Creator:
Cushman, R. M.
Object Type:
Report
System:
The UNT Digital Library
ICT in Higher Education: An Exploration of Practices in Malaysian Universities
Article investigating the use of information and communication technologies (ICTs) in education. To investigate this issue, the technology adoption and gratification (TAG) model was validated and used to examine Malaysian university teachers' adoption and gratification of ICT for teaching and research purposes and then used to investigate the moderating effect of universities in different regions. This paper confirms the utility of the TAG model for comparing teachers' adoption and gratification of ICT.
Date:
December 11, 2018
Creator:
Spector, J. Michael; Islam, A. Y. M. Atiquil; Mok, Magdalena Mo Ching; Gui, Xiaoqing & Hai-Leng, Chin
Object Type:
Article
System:
The UNT Digital Library