States

The PDQs of FAST: Simplifying function analysis for construction value studies (open access)

The PDQs of FAST: Simplifying function analysis for construction value studies

Three methods for simplifying FAST Diagrams are described which can encourage its use in construction-type value studies and bridge the gap between Information and Creativity. ``Project-FAST,`` ``Dormant- FAST`` and ``Quick-FAST`` are explained by examples which illustrate how the problem-solving capabilities of Function Analysis can be derived even from shorthand versions of FAST.
Date: January 3, 1993
Creator: Sperling, R. B.
Object Type: Article
System: The UNT Digital Library
Advanced coal-fueled gas turbine systems (open access)

Advanced coal-fueled gas turbine systems

Activity towards completing Advanced Turbine Systems (ATS) Phase I work was begun again in December. Effort to complete the Phase I work was temporarily suspended upon receipt of the ATS Phase II RFP the last week in August. The Westinghouse ATS team's efforts were directed at preparing the ATS Phase II proposal which was submitted November 18. It is planned to finish Phase I work and submit the topical report by the end of February 1993. The objective of the four slogging combustor tests conducted during this reporting period (i.e., tests SL3-1 through SL3-4) were to perform sulfur capture experiments using limestoneand iron oxide based sorbents and to collect exhaust vapor phase and solids bound alkali measurements using the Westinghouse and Ames Laboratory alkali probes/monitors. The most significant, if not outstanding result revealed by these tests is that the Ames alkali monitor indicates that the vapor phase sodium is approximately 23--30 ppbw and the vapor phase potassium is approximately 5--20 ppbw. For reference, alkalilevels of 20 ppbw are acceptable in Westinghouse gas turbines fueled with crude oil.
Date: February 3, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Advanced Coal-Fueled Gas Turbine Systems. Technical Progress Report, October--December 1992 (open access)

Advanced Coal-Fueled Gas Turbine Systems. Technical Progress Report, October--December 1992

Activity towards completing Advanced Turbine Systems (ATS) Phase I work was begun again in December. Effort to complete the Phase I work was temporarily suspended upon receipt of the ATS Phase II RFP the last week in August. The Westinghouse ATS team`s efforts were directed at preparing the ATS Phase II proposal which was submitted November 18. It is planned to finish Phase I work and submit the topical report by the end of February 1993. The objective of the four slogging combustor tests conducted during this reporting period (i.e., tests SL3-1 through SL3-4) were to perform sulfur capture experiments using limestoneand iron oxide based sorbents and to collect exhaust vapor phase and solids bound alkali measurements using the Westinghouse and Ames Laboratory alkali probes/monitors. The most significant, if not outstanding result revealed by these tests is that the Ames alkali monitor indicates that the vapor phase sodium is approximately 23--30 ppbw and the vapor phase potassium is approximately 5--20 ppbw. For reference, alkalilevels of 20 ppbw are acceptable in Westinghouse gas turbines fueled with crude oil.
Date: February 3, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Effective length measurements of prototype Main Injector Dipole endpacks (open access)

Effective length measurements of prototype Main Injector Dipole endpacks

An endpack design has been developed for the Fermilab Main Injector Dipole. A major part of the design process was the testing of a series of prototype removable endpacks. The magnetic parameters that were tested included the effective length and the field shape variation. This report presents a description of the measurement techniques and the results for the effective length. The final endpack has an effective length at 1500 A (0.29T) of 2.6 [plus minus] 0.3 mm greater than the steel length, and the change in effective length from 1500 A to maximum current of 9500 A (1.74T) is [minus]1.88 [plus minus] 0.05 mm.
Date: March 3, 1993
Creator: Glass, H. D.; Brown, B. C. & Harding, D. J.
Object Type: Report
System: The UNT Digital Library
Effective length measurements of prototype Main Injector Dipole endpacks (open access)

Effective length measurements of prototype Main Injector Dipole endpacks

An endpack design has been developed for the Fermilab Main Injector Dipole. A major part of the design process was the testing of a series of prototype removable endpacks. The magnetic parameters that were tested included the effective length and the field shape variation. This report presents a description of the measurement techniques and the results for the effective length. The final endpack has an effective length at 1500 A (0.29T) of 2.6 {plus_minus} 0.3 mm greater than the steel length, and the change in effective length from 1500 A to maximum current of 9500 A (1.74T) is {minus}1.88 {plus_minus} 0.05 mm.
Date: March 3, 1993
Creator: Glass, H. D.; Brown, B. C. & Harding, D. J.
Object Type: Report
System: The UNT Digital Library
LHe Flow Regime/Pressure Drop for D0 Solenoid at Steady State Conditions (open access)

LHe Flow Regime/Pressure Drop for D0 Solenoid at Steady State Conditions

This paper describes in a note taking format what was learned from several sources on two phase liquid helium flow regimes and pressure drops as applied to the D-Zero solenoid upgrade project. Calculations to estimate the steady state conditions for the D-Zero solenoid at 5, 10 and 15 g/s are also presented. For the lower flow rates a stratified type regime can be expected with a pressure drop less than 0.5 psi. For the higher flow rate a more homogeneous flow regime can be expected with a pressure drop between 0.4 to 1.5 psi.
Date: March 3, 1993
Creator: Rucinski, R.
Object Type: Report
System: The UNT Digital Library
Results of a baseflow tritium survey of surface water in Georgia across from the Savannah River Site (open access)

Results of a baseflow tritium survey of surface water in Georgia across from the Savannah River Site

In October 1991 the Georgia Department of Natural Resources (GDNR) issued a press release notifying the public that tritium had been measured in elevated levels (1,200 - 1,500 pCi/1) in water samples collected from drinking water wells in Georgia across from the Savannah River Site in Aiken Co. South Carolina. None of the elevated results were above the Primary Drinking Water Standard for tritium of 20,000 pCi/l. The GDNR initiated 2 surveys to determine the source and extent of elevated tritium: (1) baseflow survey of surface water quality, and (2) well evaluation program. Results from the 2 surveys indicate that the tritium measured in groundwater wells in Georgia is not the result of a groundwater flow from South Carolina under the Savannah River and into Georgia. Atmospheric transport and consequent rainout and infiltration has resulted in an increase of tritium in the water-table aquifer in the vicinity. Water samples collected from drinking water wells believed to have been installed in the aquifer beneath the water-table aquifer were actually from the shallower water-table aquifer. Water samples collected from the wells contain the amount of tritium expected for the water-table aquifer in the sample area. The measured tritium levels in the well …
Date: March 3, 1993
Creator: Nichols, R. L.
Object Type: Report
System: The UNT Digital Library
Weld overlay coatings for erosion control (open access)

Weld overlay coatings for erosion control

A literature review was made. In spite of similarities between abrasive wear and solid particle erosion, weld overlay hardfacing alloys that exhibit high abrasion resistance may not necessarily have good erosion resistance. The performance of weld overlay hardfacing alloys in erosive environments has not been studied in detail. It is believed that primary-solidified hard phases such as carbides and intermetallic compounds have a strong influence on erosion resistance of weld overlay hardfacing alloys. However, relationships between size, shape, and volume fraction of hard phases in a hardfacing alloys and erosion resistance were not established. Almost all hardfacing alloys can be separated into two major groups based upon chemical compositions of the primary solidified hard phases: (a) carbide hardening alloys (Co-base/carbide, WC-Co and some Fe base superalloys); and (b) intermetallic hardening alloys (Ni-base alloys, austenitic steels, iron-aluminides).
Date: March 3, 1993
Creator: Levin, B.; DuPont, J.N. & Marder, A.R.
Object Type: Report
System: The UNT Digital Library
Weld overlay coatings for erosion control. Task A: Literature review, progress report (open access)

Weld overlay coatings for erosion control. Task A: Literature review, progress report

A literature review was made. In spite of similarities between abrasive wear and solid particle erosion, weld overlay hardfacing alloys that exhibit high abrasion resistance may not necessarily have good erosion resistance. The performance of weld overlay hardfacing alloys in erosive environments has not been studied in detail. It is believed that primary-solidified hard phases such as carbides and intermetallic compounds have a strong influence on erosion resistance of weld overlay hardfacing alloys. However, relationships between size, shape, and volume fraction of hard phases in a hardfacing alloys and erosion resistance were not established. Almost all hardfacing alloys can be separated into two major groups based upon chemical compositions of the primary solidified hard phases: (a) carbide hardening alloys (Co-base/carbide, WC-Co and some Fe base superalloys); and (b) intermetallic hardening alloys (Ni-base alloys, austenitic steels, iron-aluminides).
Date: March 3, 1993
Creator: Levin, B.; DuPont, J. N. & Marder, A. R.
Object Type: Report
System: The UNT Digital Library
Reversed-field pinch studies in the Madison Symmetric Torus (open access)

Reversed-field pinch studies in the Madison Symmetric Torus

Studies of large-size (R = 1.5 m, a = 0.5 m), moderate current (I < 750 kA) reversed-field pinch (RFP) plasmas are carried out in the Madison Symmetric Torus in order to evaluate and improve RFP confinement, study general toroidal plasma MHD issues, determine the mechanism of the RFP dynamo, and measure fluctuation-induced transport and anomalous ion heating. MST confinement has been improved by reduction of magnetic field errors with correction coils in the primary circuit and reduction of impurities using boronization; high densities have been achieved with hydrogen pellet injection. MHD tearing modes with poloidal mode number m = 1 and toroidal mode numbers n = 5--7 are prevalent and nonlinearly couple to produce sudden relaxations akin to tokamak sawteeth. Edge fluctuation-induced transport has been measured with a variety of insertable probes. Ions exhibit anomalous heating, with increases of ion temperature occuring during strong MHD relaxation. The RFP dynamo has been studied with attention to various possible mechanisms, including motion-EMF drive, the Hall effect, and superthermal electrons. Initial profile control experiments have begun using insertable biased probes and plasma guns. The toroidal field capacity of MST will be upgraded during Summer, 1993 to allow low-current tokamak operation as well …
Date: April 3, 1993
Creator: Hokin, S.; Almagri, A.; Cekic, M.; Chapman, B.; Crocker, N.; Den Hartog, D.J. et al.
Object Type: Report
System: The UNT Digital Library
Reversed-field pinch studies in the Madison Symmetric Torus (open access)

Reversed-field pinch studies in the Madison Symmetric Torus

Studies of large-size (R = 1.5 m, a = 0.5 m), moderate current (I < 750 kA) reversed-field pinch (RFP) plasmas are carried out in the Madison Symmetric Torus in order to evaluate and improve RFP confinement, study general toroidal plasma MHD issues, determine the mechanism of the RFP dynamo, and measure fluctuation-induced transport and anomalous ion heating. MST confinement has been improved by reduction of magnetic field errors with correction coils in the primary circuit and reduction of impurities using boronization; high densities have been achieved with hydrogen pellet injection. MHD tearing modes with poloidal mode number m = 1 and toroidal mode numbers n = 5--7 are prevalent and nonlinearly couple to produce sudden relaxations akin to tokamak sawteeth. Edge fluctuation-induced transport has been measured with a variety of insertable probes. Ions exhibit anomalous heating, with increases of ion temperature occuring during strong MHD relaxation. The RFP dynamo has been studied with attention to various possible mechanisms, including motion-EMF drive, the Hall effect, and superthermal electrons. Initial profile control experiments have begun using insertable biased probes and plasma guns. The toroidal field capacity of MST will be upgraded during Summer, 1993 to allow low-current tokamak operation as well …
Date: April 3, 1993
Creator: Hokin, S.; Almagri, A.; Cekic, M.; Chapman, B.; Crocker, N.; Den Hartog, D. J. et al.
Object Type: Report
System: The UNT Digital Library
Development of More Efficacious [Tc]-99m Organ Imaging Agents for Use in Nuclear Medicine by Analytical Characterization of Radiopharmaceuticals (open access)

Development of More Efficacious [Tc]-99m Organ Imaging Agents for Use in Nuclear Medicine by Analytical Characterization of Radiopharmaceuticals

This research program is detailed at development of more efficacious technetium-99m radiopharmaceuticals for use as imaging agents in diagnostic nuclear medicine. We seek to isolate and develop distinct site imaging agents to provide diagnostic information concerning a given pathological condition. Analytical techniques are being developed to enable complete analysis of radiopharmaceutical preparations so that individual complexes can be characterized with respect to imaging efficacy and to enable a radiopharmaceutical to be monitored after injection into a test animal to determine the species that actually accumulates in an organ to provide the image. Administration of the isolated, single most effective imaging complex, rather than a mixture of technetium-containing complexes, wi-11 minimize radiation exposure to the patient and maximize diagnostic information available to the clinician. This report specifically describes the development of capillary electrophoresis (CE) for characterizating diphosphonate skeletal imaging agents. Advances in the development of electrochemical and fiber optic sensors for Tc and Re imaging agents are described. These sensors will ultimately be capable of monitoring a specific chemical state of an imaging agent in vivo after injection into a test animal by implantation in the organ of interest.
Date: May 3, 1993
Creator: Heineman, W. R.
Object Type: Report
System: The UNT Digital Library
Development of More Efficacious {Tc}-99m Organ Imaging Agents for Use in Nuclear Medicine by Analytical Characterization of Radiopharmaceuticals. Annual Technical Progress Report, September 1, 1992--August 31, 1993 (open access)

Development of More Efficacious {Tc}-99m Organ Imaging Agents for Use in Nuclear Medicine by Analytical Characterization of Radiopharmaceuticals. Annual Technical Progress Report, September 1, 1992--August 31, 1993

This research program is detailed at development of more efficacious technetium-99m radiopharmaceuticals for use as imaging agents in diagnostic nuclear medicine. We seek to isolate and develop distinct site imaging agents to provide diagnostic information concerning a given pathological condition. Analytical techniques are being developed to enable complete analysis of radiopharmaceutical preparations so that individual complexes can be characterized with respect to imaging efficacy and to enable a radiopharmaceutical to be monitored after injection into a test animal to determine the species that actually accumulates in an organ to provide the image. Administration of the isolated, single most effective imaging complex, rather than a mixture of technetium-containing complexes, wi-11 minimize radiation exposure to the patient and maximize diagnostic information available to the clinician. This report specifically describes the development of capillary electrophoresis (CE) for characterizating diphosphonate skeletal imaging agents. Advances in the development of electrochemical and fiber optic sensors for Tc and Re imaging agents are described. These sensors will ultimately be capable of monitoring a specific chemical state of an imaging agent in vivo after injection into a test animal by implantation in the organ of interest.
Date: May 3, 1993
Creator: Heineman, W. R.
Object Type: Report
System: The UNT Digital Library
Implementation of the TRL Algorithm for Improved Impedance Measurements (open access)

Implementation of the TRL Algorithm for Improved Impedance Measurements

None
Date: May 3, 1993
Creator: V., Mane & Shea, T.
Object Type: Report
System: The UNT Digital Library
Integrated computer-enhanced remote viewing system. Quarterly report No. 2, January--March 1993 (open access)

Integrated computer-enhanced remote viewing system. Quarterly report No. 2, January--March 1993

The Interactive, Computer-Enhanced, Remote Viewing System (ICERVS) is a system designed to provide a reliable geometric description of a robotic task space in a fashion that enables robotic remediation to be carried out more efficiently and economically than with present systems. The key elements are a faithful way to store empirical data and a friendly user interface that provides an operator with timely access to all that is known about a scene.
Date: May 3, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
A mechanistic study of molecular sieving inorganic membranes for gas separations. Final report, [August 1, 1992--July 31, 1993] (open access)

A mechanistic study of molecular sieving inorganic membranes for gas separations. Final report, [August 1, 1992--July 31, 1993]

The permeability of gases with kinetic diameters of 2.89 {Angstrom} to 3.9 {Angstrom} were measured through microporous silica hollow fiber membranes at 298 K to 473 K at 20 atm feed gas pressure. Permeabilities ranged from 0.01 Barrer to 1000 Barrer and were inversely proportional to the kinetic diameter of the penetrant. Linear Arrhenius plots were obtained from permeability data activation energies ranged from 7.5 to 13.5 kcal/mole. The activation energies for the hollow Tiber membranes were consistent with literature data for diffusion of hydrocarbons in zeolites. High separation factors were obtained for O{sub 2}/N{sub 2} and CO{sub 2}/CH{sub 2} mixtures. The mixture separation factors for O{sub 2}/N{sub 2} decreased from 11.5 at 298 K to 4.6 at 423 K. Over the same temperature range, CO{sub 2}/CH{sub 2} separation factors decreased from 186 to 22.3. Separation factors for O{sub 2}/N{sub 2} mixtures were up to 20% larger than the values obtained from pure gas measurements below 373 K. A similar effect was seen for CO{sub 2}/CH{sub 2} mixtures after the membrane had been heated to at least 398 K and then cooled in inert gas flow. Differences between separation factors and ideal gas values is attributed to a competitive adsorption …
Date: May 3, 1993
Creator: Way, J. D.
Object Type: Report
System: The UNT Digital Library
San Antonio Monthly Reports: April 1993 (open access)

San Antonio Monthly Reports: April 1993

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date: May 3, 1993
Creator: San Antonio (Tex.)
Object Type: Report
System: The Portal to Texas History
Surface path lines in plane stokes flow driven by capillarity (open access)

Surface path lines in plane stokes flow driven by capillarity

Consider the free creeping viscous plane flow in a region, bounded by a simple smooth closed curve and driven solely by surface tension. The shape evolution may in principle, and often in practice, be described by a time-dependent mapping z = {Omega}({zeta},t) of the unit circle, conformal on {vert_bar}{zeta}{vert_bar} {le} 1. It is shown that the path lines of fluid elements at the surface are determined by a first-order ordinary differential equation involving {Omega}({zeta},t), together with an initial condition. Typically, this must be integrated numerically. Velocities are not needed. The analogous theory for maps from the half-plane Im {zeta} {ge} 0 is presented. Surface path lines of a collapsing elliptic hole, in two reference frames, are calculated.
Date: May 3, 1993
Creator: Hopper, R. W.
Object Type: Report
System: The UNT Digital Library
Texas Disease Prevention News, Volume 53, Number 9, May 1993 (open access)

Texas Disease Prevention News, Volume 53, Number 9, May 1993

Newsletter of the Texas Department of Health discussing the news, activities, and events of the organization and other information related to health in Texas.
Date: May 3, 1993
Creator: Texas. Department of Health.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Two-dimensional particle-in-cell simulation on transputer arrays (open access)

Two-dimensional particle-in-cell simulation on transputer arrays

The authors have implemented a particle-in-cell method on a 32 transputer computing network. The tests have shown that the performance of this system reaches 1/8 of the equivalent one for the code optimized for a CRAY Y-MP/2E. The system performance analysis shows that this network remains cost-effective until expanded approximately up to 100 transputers. This transputer equipment has provided an efficient computational tool for investigating a novel physical phenomenon -- a collisionless mechanism for separation of different elements in colliding plasma beams.
Date: May 3, 1993
Creator: Dyachenko, A. I.; Pushkarev, A. N.; Laypunov, M. A.; Talnykin, E. A.; Omelchenko, Yu. A. & Rubenchik, A. M.
Object Type: Article
System: The UNT Digital Library
[Carbank and the complex carbohydrate structure database] (open access)

[Carbank and the complex carbohydrate structure database]

A brief overview of the CarbBank, a carbohydrate database, is provided.
Date: June 3, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Horizontal oil well applications and oil recovery assessment. Technical progress report, April--June 1994 (open access)

Horizontal oil well applications and oil recovery assessment. Technical progress report, April--June 1994

Thousands of horizontal wells are being drilled each year in the U.S.A. and around the world. Horizontal wells have increased oil and gas production rates 3 to 8 times those of vertical wells in many areas and have converted non-economic oil reserves to economic reserves. However, the use of horizontal technology in various formation types and applications has not always yielded anticipated success. The primary objective of this project is to examine factors affecting technical and economic success of horizontal well applications. The project`s goals will be accomplished through six tasks designed to evaluate the technical and economic success of horizontal drilling, highlight current limitations, and outline technical needs to overcome these limitations. Data describing operators` experiences throughout the domestic oil and gas industry will be gathered and organized. Canadian horizontal technology will also be documented with an emphasis on lessons the US industry can learn from Canada`s experience. MEI databases containing detailed horizontal case histories will also be used. All these data will be categorized and analyzed to assess the status of horizontal well technology and estimate the impact of horizontal wells on present and future domestic oil recovery and reserves.
Date: June 3, 1993
Creator: McDonald, W. J.
Object Type: Report
System: The UNT Digital Library
Search for the top quark from (e,{mu}) and (e,e) events in the D0 detector in p{bar p} collisions at {radical}s = 1.8 TeV (open access)

Search for the top quark from (e,{mu}) and (e,e) events in the D0 detector in p{bar p} collisions at {radical}s = 1.8 TeV

We present results from searches for top quark production in p{bar p} collisions at the Tevatron collider based on an integrated luminosity of 7.5 pb{sup {minus}1} obtained during the 1992--1993 ran. The present results are confined to decay modes where both the top and anti-top quarks in the event decay semi-leptonically to the ee and e{mu} channels. A lower limit of 103 (99) GeV/c{sup 2} is obtained at 95% confidence level for the top quark mass from the absence of events consistent with standard model top quark decays with background subtraction (no background subtraction). We do however observe one event in the e{mu} channel which cannot be explained by the known backgrounds. While we make no claim that this event is due to top quark decay, it is not inconsistent with a top quark mass in the range 130--170 GeV/c{sup 2}
Date: June 3, 1993
Creator: Raja, R.
Object Type: Article
System: The UNT Digital Library
Search for the top quark from (e,[mu]) and (e,e) events in the D0 detector in p[bar p] collisions at [radical]s = 1. 8 TeV (open access)

Search for the top quark from (e,[mu]) and (e,e) events in the D0 detector in p[bar p] collisions at [radical]s = 1. 8 TeV

We present results from searches for top quark production in p[bar p] collisions at the Tevatron collider based on an integrated luminosity of 7.5 pb[sup [minus]1] obtained during the 1992--1993 ran. The present results are confined to decay modes where both the top and anti-top quarks in the event decay semi-leptonically to the ee and e[mu] channels. A lower limit of 103 (99) GeV/c[sup 2] is obtained at 95% confidence level for the top quark mass from the absence of events consistent with standard model top quark decays with background subtraction (no background subtraction). We do however observe one event in the e[mu] channel which cannot be explained by the known backgrounds. While we make no claim that this event is due to top quark decay, it is not inconsistent with a top quark mass in the range 130--170 GeV/c[sup 2]
Date: June 3, 1993
Creator: Raja, R.
Object Type: Article
System: The UNT Digital Library