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399 Matching Results

Start Over Decade 1980-1989 Month May Day 29th Language English

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(open access)

Method and apparatus for injecting a substance into the bloodstream of a subject

An apparatus and method for injecting a substance, such as a radiopharmaceutical, into the bloodstream of a subject is described. The apparatus comprises an injection means, such as a servo controlled syringe, a means for measuring the concentration of that substance in the subject's bloodstream, and means for controlling the injection in response to the measurement so that the concentration of the substance follows a predetermined function of time. The apparatus of the subject invention functions to inject a substance into a subject's bloodstream at a rate controlled by an error signal proportional to the difference between the concentration of the substance in the subject's bloodstream and the predetermined function.

Date: May 29, 1981

Creator: Lambrecht, R. M.; Bennett, G. W.; Duncan, C. C. & Ducote, L. W.

Object Type: Patent

System: The UNT Digital Library

(open access)

Production of super-smooth articles

Super-smooth rounded or formed articles made of thermoplastic materials including various poly(methyl methacrylate) or acrylonitrile-butadiene-styrene copolymers are produced by immersing the articles into a bath, the composition of which is slowly changed with time. The starting composition of the bath is made up of at least one solvent for the polymer and a diluent made up of at least one nonsolvent for the polymer and optional materials which are soluble in the bath. The resulting extremely smooth articles are useful as mandrels for laser fusion and should be useful for a wide variety of other purposes, for example lenses.

Date: May 29, 1981

Creator: Duchane, D. V.

Object Type: Patent

System: The UNT Digital Library

(open access)

Overview of radioactive waste management

The question of what to do with radioactive wastes is discussed. The need to resolve this issue promptly is pointed out. Two significant events which have occurred during the Carter administration are discussed. An Interagency Review Group (IRG) on waste management was formed to formulate recommendations leading to the establishment of a National policy for managing radioactive wastes. The technical findings in the IRG report are listed. The author points out some issues not addressed by the report. President Carter issued a national policy statement on Radioactive Waste Management in February 1980. The most significant elements of this statement are summarized. The cancellation of the Waste Isolation Pilot Plant is currently meeting opposition in Congress. This and other items in the National Policy Statement are discussed.

Date: May 29, 1980

Creator: Ritter, G.L.

Object Type: Article

System: The UNT Digital Library

(open access)

Localized corrosion of steels in geothermal steam/brine mixtures

Coupons of eight different carbon and chrome-moly alloy steels were exposed to high temperature, high salinity wellhead brine flow at a geothermal well in the Salton Sea Geothermal Field for periods of up to six months. The corrosion rate and corrosion attack morphology of each coupon was determined. Exposure time was a test variable and ranged from one month to six months. Test results indicate that carbon steels generally suffer high corrosion rates and are susceptible to severe localized attack which shows a mesa-canyon pattern. Chrome-moly alloy steels corrode at much lower rates and show an attack pattern of small shallow pits. With time, these pits grow mostly in the lateral direction. These results suggest that chrome-moly alloy steels offer significant improvement over carbon steels and that the disk-shaped pits are not likely to lead to rapid perforation.

Date: May 29, 1980

Creator: McCright, R. D.; Frey, W. F. & Tardiff, G. E.

Object Type: Article

System: The UNT Digital Library

(open access)

[Letter from James Miller to Richard G. Brown, May 29, 1987]

Letter from James Miller to Richard G. Brown, on May 29, 1987, thanking him for his assistance in the establishment of the Texas Academy of Mathematics and Science, and informing him of the program's financial situation.

Date: May 29, 1987

Creator: Miller, James R.

Object Type: Letter

System: The UNT Digital Library

(open access)

[Letter from Rogers Redding to James Miller, May 29, 1989]

Letter from Rogers Redding to Jim Miller, on May 29, 1989, discussing the achievements of the first class of Texas Academy of Mathematics and Science students, and the number of students returning. A graph showing the distribution of the grade point averages of the TAMS students in included.

Date: May 29, 1989

Creator: Redding, Rogers W.

Object Type: Letter

System: The UNT Digital Library

(open access)

Reservoir response to tidal and barometric effects

Solid earth tidal strain and surface loading due to fluctuations in barometric pressure have the effect, although extremely minute, of dilating or contracting the effective pore volume in a porous reservoir. If a well intersects the formation, the change in pore pressure can be measured with sensitive quartz pressure gauges. Mathematical models of the relevant fluid dynamics of the well-reservoir system have been generated and tested against conventional well pumping results or core data at the Salton Sea Geothermal Field (SSGF), California and at the Raft River, Geothermal Field (RRGF), Idaho. Porosity-total compressibility product evaluation based on tidal strain response compares favorably with results based on conventional pumping techniques. Analysis of reservoir response to barometric loading using Auto Regressive Integrated Moving Average (ARIMA) stochastic modeling appears also to have potential use for the evaluation of reservoir parameters.

Date: May 29, 1980

Creator: Hanson, J.M.

Object Type: Article

System: The UNT Digital Library

(open access)

Progress toward identification of gluonic states

Progress in the last two years toward identification of gluonic states is reviewed. Discovery of additional pseudoscalars tends to confirm the glueball interpretation of iota(1460). A variety of evidence indicates new physics in the J = 1 channel in the E mass region. 65 refs., 1 tab.

Date: May 29, 1987

Creator: Chanowitz, Michael S.

Object Type: Article

System: The UNT Digital Library

captions transcript

[News Clip: Flags]

Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story by reporter Jack Helsel about Fort Worth based ABC Flag company which has been making American, state, and foreign flags in addition to banners and penants since 1960. The footage includes an interview with an unidentified company representative about the historically Northern business and their own increased business during the Vietnam War. This story aired at 6:00 P.M.

Date: May 29, 1985

Creator: KXAS-TV (Television station : Fort Worth, Tex.)

Object Type: Video

System: The UNT Digital Library

(open access)

The Tulia Herald (Tulia, Tex.), Vol. 72, No. 22, Ed. 1 Thursday, May 29, 1980

Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.

Date: May 29, 1980

Creator: Tooley, Wendell

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Tulia Herald (Tulia, Tex.), Vol. 78, No. 22, Ed. 1 Thursday, May 29, 1986

Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.

Date: May 29, 1986

Creator: Tooley, Wendell

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Use of the (t,p) reaction for in-beam spectroscopy studies

Triton induced reactions, such as the (t,p) reaction, can be used for in-beam gamma-ray and conversion-electron studies of nuclei that are somewhat neutron rich. We have developed systems for both conversion-electron and gamma-ray spectroscopy in coincidence with the outgoing energetic proton to identify the (t,p) reaction channel. Data from the /sup 142/Nd(t,p..gamma..) reaction illustrate several of the characteristics of this reaction for studying nuclear structure. Preliminary results from the study of /sup 96/Zr by conversion-electron spectroscopy, and /sup 240/U by gamma-ray spectroscopy, are reported. 4 refs., 4 figs.

Date: May 29, 1986

Creator: Henry, E.A.

Object Type: Article

System: The UNT Digital Library

captions transcript

[News Clip: Airport drugs]

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Date: May 29, 1980, 10:00 p.m.

Creator: KXAS-TV (Television station : Fort Worth, Tex.)

Object Type: Video

System: The UNT Digital Library

captions transcript

[News Clip: Hunt Bros]

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Date: May 29, 1980, 10:00 p.m.

Creator: KXAS-TV (Television station : Fort Worth, Tex.)

Object Type: Video

System: The UNT Digital Library

(open access)

The Bogata News (Bogata, Tex.), Vol. 75, No. 34, Ed. 1 Thursday, May 29, 1986

Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.

Date: May 29, 1986

Creator: Nichols, Nanalee & Nichols, Thomas

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Ingleside Index (Ingleside, Tex.), Vol. 37, No. 16, Ed. 1 Thursday, May 29, 1986

Weekly newspaper from Ingleside, Texas that includes local, state, and national news along with advertising.

Date: May 29, 1986

Creator: Fischer, Tim

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Large-area silicon sheet by EFG. First quarterly report, January 1, 1981-March 31, 1981

A multiple growth run with three 10 cm cartridges was carried out with the best throughput rates and time percentage of simultaneous three-ribbon growth achieved to date in this system. Growth speeds were between 3.2 and 3.6 cm/minute on all three cartridges and simultaneous full-width growth of three ribbons was achieved 47% of the time over the eight-hour duration of the experiment. Improvements in instrumentation and in the main zone temperature uniformity have been two factors that have led to more reproducible growth conditions in the multiple ribbon furnace. Factors influencing ribbon quality are being investigated through the study of the effect of ambient gas species and concentrations on material properties. Growth of ribbon with the cold shoes characteristic of the high-speed systems has shown that the properties of this ribbon respond to ambient changes in much the same way as when no cold shoes are present. The best cell efficiencies attained for 10 cm wide ribbon grown with cold shoes are still below those obtained without cold shoes (10 to 11% versus 12 to 13%, respectively). It has also been shown in these experiments that meniscus CO/sub 2/ and quartz introduced in the melt (contained in graphite crucibles) are …

Date: May 29, 1981

Creator: unknown

Object Type: Report

System: The UNT Digital Library