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Last Known Position

Description: Most of the nine stories in Last Known Position were written upon James Mathews’ return from combat deployment to the Middle East with the D.C. Air National Guard. Life under fire provided the author with both dramatic events and a heightened sense of observation, allowing him to suggest the stress of combat as the driving factor behind extreme yet believable characterization and action. Military experiences and settings cause certain human elements and truisms to emerge more profoundly and dramatically. These stories portray desperate characters driven to make desperate choices. Always on the edge of a dark and unpleasant reality, Mathews’ characters survive by embracing fantasy, humor, violence, and sometimes redemption. Each story bears its own brand of hopeless quirkiness. Four teenagers on an army base steal a grenade and are stalked by a parade horse. A drifter returns home to rob the grandparents who raised him. A national guardsman faces a homicidal superior officer in Iraq on the eve of war. An elderly man worries that his wife’s new house guests are unrepentant cannibals. Always tense, sometimes ridiculous, and never dull, Last Known Position brings the reader to places unknown before and unforgettable after.
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Date: November 15, 2008
Creator: Mathews, James
Partner: UNT Press

Wireline well logging an underutilized technique in reservoir evaluation

Description: Wireline well logs have three general uses in geothermal exploration and reservoir evaluation: reservoir parameter analysis, lithologic column determination, and reservoir size resolution. Reservoir flow testing data are acquired to understand the flow rate, life, and production potential of the geothermal reservoir. These data are a coarse subsurface measurement of the geothermal prospect. Wireline logs acquired from wells in a geothermal prospect are used to define in detail, or estimate the reservoir parameters of temperature, thickness, lateral size, amount of fracture and intergranular pore space, and the quantity and quality of fluid that might be produced. Laboratory measurements can be made on core samples and drill cuttings samples to define the intrinsic behavior of the materials and fluid that compose the geotheraml reservoir. Wireline log measurements are needed to correlate and link the reservoir testing and core analysis, reduce the amount of time needed for flow testing, and predict the production life (amount of heat and fluid available) in a geothermal field.
Date: January 1, 1981
Creator: Mathews, M.
Partner: UNT Libraries Government Documents Department

Calibration models for fractured rock environments

Description: Accurate measurement and recording of log data is necessary for effective well evaluation, reservoir engineering assessment, and subsurface geological or geophysical appraisal. Proper interpretation of log data provides accurate subsurface geologic parameters. Calibration data that is auxiliary to the log data will show the degree of log accuracy and indicate the reliability of the estimated subsurface geologic parameters when the log data is reviewed with a knowedge of the calibration procedures. Three large calibration models or test pits are presently being fabricated. Each calibration model will be constructed of large stone blocks which have a cored-borehole and wire-sawn simulated fractures. Details of the test pits size, simulated fracture locations, rock type of each test pit, and location and access of these pits are discussed. Supporting data from rock properties of similar rock that will be used in each test pit are included.
Date: January 1, 1980
Creator: Mathews, M.
Partner: UNT Libraries Government Documents Department

Calibration models for fractured igneous rock environments

Description: At the present time, geophysical well logs are not calibrated for igneous and metamorphic lithologies or for fracture porosity. These geologic conditions are routinely encountered in geothermal reservoirs and geothermal fields. Three large calibration models or test pits are presently being fabricated. Each calibration model will be constructed of large stone blocks which have a cored-borehole and wire-sawn simulated fractures. Details of the test pit size, simulated fracture locations, rock type of each test pit, and location and access of these pits are discussed.
Date: January 1, 1980
Creator: Mathews, M.
Partner: UNT Libraries Government Documents Department

Financing options for a local conservation and solar retrofit program

Description: Several public financing approaches are evaluated and a brief assessment of their attractiveness is made on the basis of costs/benefits, political acceptability, and administrative efficiency. The financing approaches considered have particular relevance to 1 to 4 unit owner occupied dwellings but may potentially be used for other sectors as well. An effective program will attempt to involve private entities, so as to leverage scarce resources and to promote broader community support. The roles of banks and Savings and Loans Associations, consumer cooperations and utilities are considered as a means of expanding the scope of a local financing program for energy efficient technologies.
Date: January 1, 1981
Creator: Mathews, R.
Partner: UNT Libraries Government Documents Department

Log data comparison and quantification

Description: Two geothermal wells were logged with similar wireline logs by several logging companies in a period of five years (1974 to 1979). The results of these equivalent logs are quantitatively different and in some cases qualitatively different. This difference also occurs between the same type of logs recorded at different time intervals by the same logging company. These various log data are related and qualified when logging equipment has not been properly calibrated. All depths referred to for either well are from their respective kelly bushing (KB). The first well (Mesa 31-1) is in the Imperial Valley of California and penetrates a sand, shale, and clay sedimentary lithology with a maximum temperature of 165/sup 0/C (330/sup 0/F) and a total depth of 1882 m (6175 ft). The second well (Phillips 9-1) is in the Roosevelt Hot Springs known geothermal resource areas (KGRA) of southwestern Utah and penetrates hydrothermally altered (low-grade metamorphic) and igneous lithology with a maximum temperature of 225/sup 0/C (440/sup 0/F) and a toatl depth of 2098.5 m (6885 ft). During that period (1974 to 1979) calibration of logging equipment in metamorphic and igneous lithologies could not be done. The logging data from this well is not qualitatively comparable in all cases and indicates the need for calibration. The open-hole log data acquired from Mesa 31-1 and Phillips 9-1 wells were compared to core data from these wells and comparison factors were calculated to better quantify the open-hole log data. Then open-hole log data were compared to the cased-hole log data from various companies and additional comparison factors were calculated for the cased-hole log data. These comparison factors allow for some quantification of these uncalibrated log data.
Date: January 1, 1981
Creator: Mathews, M. & LaDelfe, C.
Partner: UNT Libraries Government Documents Department

Applications for fission product data to problems in stellar nucleosynthesis

Description: A general overview of the nucleosynthesis mechanisms for heavy (A greater than or equal to 70) nuclei is presented with particular emphasis on critical data needs. The current state of the art in nucleosynthesis models is described and areas in which fission product data may provide useful insight are proposed. 33 references, 10 figures.
Date: October 1, 1983
Creator: Mathews, G.J.
Partner: UNT Libraries Government Documents Department

Heavy-element nucleosynthesis

Description: New measurements and theoretical studies of nuclear properties, together with new astronomical data on the growth of heavy-element abundances during the early history of the Galaxy, now provide a clearer picture of where in nature the elements heavier than iron are produced by rapid (r-process) and show (s-process) neutron capture reactions. The nuclear data suggest that the r-process involves a high-neutron-density beta-flow equilibrium environment and that the s-process may have occurred at a temperature and neutron density consistent with a {sup 13}C({alpha},n){sup 16}0 neutron source. The astronomical data, when compared with simple galactic chemical evolution modes, suggests that the r-process is associated with type II supernovae and that the neutron source must be manufactured by the star. Low-mass type II supernovae are proposed as the most important contributors to the r-process. A {sup 13}C neutron source in intermediate-mass stars is proposed for the s-process. 64 refs., 7 figs.
Date: October 30, 1990
Creator: Mathews, G.J.
Partner: UNT Libraries Government Documents Department

Log Interpretation Techniques to Identify Production Zones in Geothermal Wells

Description: Identification of production zones in a fractured or faulted qeotherrnal well is quantitatively difficult. Temperature and spinner surveys along with flow tests are the techniques generally used to identify and describe these fractured zones during production testing. These techniques generally do not describe the production zones in any detail and they miss or bypass potential zones of production when fractures have been closed or plugged during the drilling process. These latter zones could possibly be stimulated (hydraulic fracturing, acidizing, explosive fracturing) and brought into production if all the fracture zones could be identified and described. Interpretation techniques using wireline logs show promise in identifying and describing fractured (open and closed) zones in geothermal wells. The strategy described in this paper on two different geothermal wells (the hot dry rock well and the Surprise Valley well) used a trial and error basis to outline and define the interpretation techniques that work best in each case. Fracture zones are identified that are both open and closed and this type of information gives a better estimation of reservoir size, flow control and reservoir life (production potential) from geothermal wells.
Date: December 16, 1980
Creator: Mathews, Mark
Partner: UNT Libraries Government Documents Department

Turning Up the Heat: How Global Warming Threatens Life in the Sea

Description: This new report argues that rising temperatures have impacted the world's oceans to a far greater extent than previously acknowledged. Addressing topics such as sea-level rise, ocean circulation, coral reefs, sea birds and invertebrates, as well as the increasing threats to Salmon, the report predicts a dangerous chain reaction in marine ecosystems if global warming continues unabated. On the positive side, it also argues that decisive actions now to reduce pollution can slow the warming and preserve the world's oceans.
Date: February 1999
Creator: Berntson, Ewann A.
Partner: UNT Libraries

Influence of nuclear data uncertainties on thorium fusion-fission hybrid blanket nucleonic performance

Description: The fusion-fission hybrid blanket proposed for the Tandem Mirror Hybrid Reactor employs thorium metal as the fertile material. Based on the ENDF/B-IV nuclear data, the /sup 233/U and tritium production rate and blanket energy multiplication averaged over the blanket lifetime of about 9 MW-yr/m/sup 2/ are 0.76 and 1.12 per D-T neutron and 4.8, respectively. At the time of the blanket discharge, the /sup 233/U enrichment in the thorium metal is about 3%. The thorium cross sections given by the ENDF/B-IV and V were reviewed, and the important partial cross sections such as (n,2n), (n,3n), and (n,..gamma..) were found to be known to +-10 to 20% in the respective energy range of interest. A sensitivity study showed that the /sup 233/U and tritium production rate and blanket energy multiplication are relatively sensitive to the thorium capture and fission cross section uncertainties. In order to predict the above parameters within +-1%, the Th(n,..gamma..) and Th(n,..nu..f) cross sections must be measured within about +-2% in the energy range 3 to 3000 keV and 13.5 to 15 MeV, respectively.
Date: September 1, 1979
Creator: Cheng, E.T. & Mathews, D.R.
Partner: UNT Libraries Government Documents Department

An analytical investigation of the effects of elevator-fabric distortion on the longitudinal stability and control of an airplane

Description: From Summary: "The results of an analytical investigation to determine the qualitative effects of elevator-fabric distortion on the stick-force characteristics of an airplane are presented. These results indicate that serious alteration of intended stick-force characteristics can be produced by elevator-fabric distortion."
Date: May 1944
Creator: Mathews, Charles W.
Partner: UNT Libraries Government Documents Department

Final closure plan for the high-explosives open burn treatment facility at Lawrence Livermore National Laboratory Experimental Test Site 300

Description: This document addresses the interim status closure of the HE Open Bum Treatment Facility, as detailed by Title 22, Division 4.5, Chapter 15, Article 7 of the Califonia Code of Regulations (CCR) and by Title 40, Code of Federal Regulations (CFR) Part 265, Subpart G, ``Closure and Post Closure.`` The Closure Plan (Chapter 1) and the Post- Closure Plan (Chapter 2) address the concept of long-term hazard elimination. The Closure Plan provides for capping and grading the HE Open Bum Treatment Facility and revegetating the immediate area in accordance with applicable requirements. The Closure Plan also reflects careful consideration of site location and topography, geologic and hydrologic factors, climate, cover characteristics, type and amount of wastes, and the potential for contaminant migration. The Post-Closure Plan is designed to allow LLNL to monitor the movement, if any, of pollutants from the treatment area. In addition, quarterly inspections will ensure that all surfaces of the closed facility, including the cover and diversion ditches, remain in good repair, thus precluding the potential for contaminant migration.
Date: April 1, 1997
Creator: Mathews, S.
Partner: UNT Libraries Government Documents Department

Reuse of waste cutting sand at Lawrence Livermore National Laboratory

Description: Lawrence Livermore National Laboratory (LLNL) examined the waste stream from a water jet cutting operation, to evaluate the possible reuse of waste garnet sand. The sand is a cutting agent used to shape a variety of materials, including metals. Nearly 70,000 pounds of waste sand is generated annually by the cutting operation. The Environmental Protection Department evaluated two potential reuses for the spent garnet sand: backfill in utility trenches; and as a concrete constituent. In both applications, garnet waste would replace the sand formerly purchases by LLNL for these purposes. Findings supported the reuse of waste garnet sand in concrete, but disqualified its proposed application as trench backfill. Waste sand stabilized in ac concrete matrix appeared to present no metals-leaching hazard; however, unconsolidated sand in trenches could potentially leach metals in concentrations high enough to threaten ground water quality. A technical report submitted to the San Francisco Bay Regional Water Quality Control Board was reviewed and accepted by that body. Reuse of waste garnet cutting sand as a constituent in concrete poured to form walkways and patios at LLNL was approved.
Date: February 25, 1998
Creator: Mathews, S., LLNL
Partner: UNT Libraries Government Documents Department

Hydrodynamics and nucleosynthesis in neutron stars, supernovae, and the early universe

Description: In this proposal we apply laboratory expertise in integrated numerical modeling of relativistic hydrodynamics, radiation transport, and thermonuclear reaction rates to forefront areas of basic research in areas of astrophysical interest. These studies include the last stages of a merging neutron-star binary system; the pre-collapse, collapse, and post-collapse evolution of supernova cores; the violent relaxation, protogalactic mergers, and stellar nucleosynthesis associated with galaxy formation and studies of primordial nucleosynthesis during the big bang. This project provides unique high-visibility solutions to current technical problems while enriching current laboratory capabilities in the relevant disciplines.
Date: March 1, 1996
Creator: Mathews, G.
Partner: UNT Libraries Government Documents Department

Time Variation of the Distance Separating Bomb and Dive Bomber Subsequent to Bomb Release

Description: A study has been made of the variation of the distance separating bomb and aircraft with time after release as applied to dive-bombing operations, Separation distances determined from this study are presented in terms of two variables only, dive angle and maximum airplane accelerometer reading; the values of separation distance include the effects of delay in initiation of the pull-out and lag in attainment of the maximum normal acceleration. Contains analysis and calculations of the separation distances between bomb and dive bomber following bomb release; separation distances as determined by the dive angle and the maximum airplane accelerometer reading are presented in a single chart.
Date: June 6, 1952
Creator: Mathews, Charles W.
Partner: UNT Libraries Government Documents Department

A parameter study of the r process

Description: We consider the r-process production of actinide nuclei from a high temperature nucleon gas in a model which is most favorable for the r process. In this way, we can place upper limits on the value of the free electron fraction, Y/sub e/, of the material which experiences the r process. We find that for a broad range of initial nucleon densities, Y/sub e/ must be small (close to that for equilibrium neutron star matter). 11 refs., 2 figs.
Date: September 1, 1987
Creator: Sale, K.E. & Mathews, G.J.
Partner: UNT Libraries Government Documents Department

Study of the attack of an automatically controlled interceptor on a maneuvering bomber with emphasis on proper coordination of lift-acceleration and roll-angle commands during rolling maneuvers

Description: Report presenting an investigation of the proper means of coordinating the lift-acceleration commands and the roll-attitude commands to the autopilot in order to minimize transient racking errors encountered during bomber evasion. Results regarding the pull-up maneuver, horizontal turning maneuvers, the split S vertical plane maneuver, diving turn maneuver, other considerations involved in rolling maneuvers, and maximum rates of roll, control motion, and tracking-line motion are provided.
Date: August 4, 1954
Creator: Mathews, Charles W.
Partner: UNT Libraries Government Documents Department

Study of the canard configuration with particular reference to transonic flight characteristics and low-speed characteristics at high lift

Description: Report presenting a study of the flight characteristics of the canard configuration at transonic and supersonic speeds. Known problems concerning the low-speed characteristics of the canard are also investigated.
Date: November 16, 1949
Creator: Mathews, Charles W.
Partner: UNT Libraries Government Documents Department

Prospects for understanding the astrophysical r-process

Description: This paper discusses several recent advances toward a deeper understanding of the still unknown astrophysical site for rapid (r-process) neutron capture nucleosynthesis. The physical constraints on the r-process from the input nuclear data are highlighted and the particular importance of the recent measurements of beta-decay lifetimes along the r-process path is discussed. Astronomical observations of s- and r-process elemental abundances on metal poor halo stars are also discussed, in the context of models for the galactic chemical evolution of heavy-element abundances, as a constraint on the nature of the r-process. On the basis of these constraints it is suggested that the most likely source for the r-process may be from the ejection of core material from low-mass type II supernovae. 27 refs., 1 fig.
Date: July 1, 1988
Creator: Mathews, G.J. & Cowan, J.J.
Partner: UNT Libraries Government Documents Department

Primordial nucleosynthesis in inhomogeneous cosmologies:. cap omega. = 1 with baryonic dark matter

Description: We consider the constraints on ..cap omega.. from primordial nucleosynthesis in inhomogeneous cosmologies. We find that allowance for isothermal fluctuations significantly weakens the upper bound on the average value of ..cap omega.. derived from the standard big bang. Under the plausible additional assumption that regions of high baryon density are preferentially absorbed into cold dark matter, the constraints from primordial nucleosynthesis can be satisfied for large values of ..cap omega.., including ..cap omega.. = 1. 22 refs., 2 figs.
Date: September 1, 1986
Creator: Mathews, G.J. & Sale, K.E.
Partner: UNT Libraries Government Documents Department