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529 Matching Results
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Properties of the System: Uranyl Nitrate-Aluminum Nitrate - Nitric Acid (or Sodium Hydroxide) - Sodium Nitrate - Water - Hexone
This report discusses properties of the Redox process. Density, apparent molar volumes and viscosity are all described.
Date:
March 22, 1949
Creator:
Burger, L. L.; Rehn, I. M.; Schmidt, H. R. & Slansky, C. M.
Object Type:
Report
System:
The UNT Digital Library
The Preparation of Thin Films of Plutonium by Electrodeposition
This report discusses methods for preparing thin films of plutonium on metallic disks, which are used for alpha energy analysis, fission counting, and preparation of geometry standards in ordinary counting. Various methods of preparation were tested and analyzed, but electrodeposition was the most effective method. Deposition was then tested, but the yields were "somewhat erratic".
Date:
March 22, 1950
Creator:
Miller, H. W. & Brouns, R. J.
Object Type:
Report
System:
The UNT Digital Library
The Oxidation of Plutonium to the Plutonyl State
This report follows the study of the oxidation of plutonium III and IV to the plutonyl state.
Date:
March 22, 1950
Creator:
Miller, H. W. & Brouns, R. J.
Object Type:
Report
System:
The UNT Digital Library
Beryllium-oxide : [bibliography]
"This is a bibliography of journal articles relating to beryllium oxide. Sources consulted include; Chemical Abstracts, 1951-1955; Physics Abstracts, 1951-1955; Industrial Arts Index, 1955-Jan, 1957; and the library card catalog. Starred articles are available in the library.
Date:
March 22, 1957
Creator:
Cason, Maggie
Object Type:
Report
System:
The UNT Digital Library
Environmental radiological studies downstream from Rancho Seco Nuclear Power Generating Station
This report summarizes the information compiled in 1984 while assessing the environmental impact of radionuclides in aquatic releases from the Rancho Seco Nuclear Power Generating Station. Gamma-emitting radionuclides discharged since 1981 are found in many of the dietary components derived from the creeks receiving the effluent wastewater. Some soils and crops are found to contain radionuclides that originate from the contaminated water that was transferred to land during the irrigation season. /sup 134/Cs and /sup 137/Cs are the primary gamma-emitting radionuclides detected in the edible flesh of fish from the creeks. Concentrations in the flesh of fish decreased exponentially with distance from the plant. No significant differences in the /sup 137/Cs activity were found between male and female fish of equal size, but concentrations may vary in fish of different size, with the season and diet. 21% of the total /sup 137/Cs and /sup 134/Cs discharged between 1981 and 1984 is associated with the creek sediments to a distance of 27 km from the plant. Fractions of the missing inventory have been transferred to land during the irrigation season or to downstream regions more distant than 27 km from the plant. The radiocesium content of the sediments in 1984 decreased …
Date:
March 22, 1985
Creator:
Noshkin, V. E.; Wong, K. M.; Eagle, R. J.; Dawson, J. W.; Brunk, J. L. & Jokela, T. A.
Object Type:
Report
System:
The UNT Digital Library
Only source of energy
Various plants that might play a role in the energy mix of the future are discussed and illustrated. Included among them are the Euphorbias and Guayule. (JGB)
Date:
March 22, 1978
Creator:
Calvin, G. J. & Calvin, M.
Object Type:
Report
System:
The UNT Digital Library
Effects of low-temperature fusion neutron irradiation on critical properties of a monofilament niobium-tin superconductor
The objective of this work was to irradiate a Nb/sub 3/Sn superconductor with 14.8 MeV neutrons at 4 K and measure critical current in transverse fields of up to 12 T, irradiating up to a fluence sufficient to decrease the critical current to below its initial value. Critical temperatures were also to be measured. The samples were to be kept near 4 K between the irradiation and the measurement of critical properties. This work is directed toward establishing an engineering design fluence limit for Nb/sub 3/Sn when used in fusion reactor superconducting magnets.
Date:
March 22, 1984
Creator:
Guinan, M.W.; Van Konynenburg, R.A. & Mitchell, J.B.
Object Type:
Report
System:
The UNT Digital Library
Recent US target-physics-related research in heavy-ion inertial fusion: simulations for tamped targets and for disk experiments in accelerator test facilities
Calculations suggest that experiments relating to disk heating, as well as beam deposition, focusing and transport can be performed within the context of current design proposals for accelerator test-facilities. Since the test-facilities have lower ion kinetic energy and beam pulse power as compared to reactor drivers, we achieve high-beam intensities at the focal spot by using short focal distance and properly designed beam optics. In this regard, the low beam emittance of suggested multi-beam designs are very useful. Possibly even higher focal spot brightness could be obtained by plasma lenses which involve external fields on the beam which is stripped to a higher charge state by passing through a plasma cell. Preliminary results suggest that intensities approx. 10/sup 13/ - 10/sup 14/ W/cm/sup 2/ are achievable. Given these intensities, deposition experiments with heating of disks to greater than a million degrees Kelvin (100 eV) are expected.
Date:
March 22, 1982
Creator:
Mark, J.W.K.
Object Type:
Article
System:
The UNT Digital Library
Nonlinear materials for frequency conversion
Two figures of merit, the threshold power (P/sub th/) and the limiting volume (V/sub min/) can be used to compare the relative efficiency and economy of new harmonic generating crystals. The properties of barium metaborate and L-Arginine phosphate are used to illustrate the effect of nonlinearity, birefringence, and damage threshold on these figures of merit.
Date:
March 22, 1988
Creator:
Velsko, S. P. & Eimerl, D.
Object Type:
Article
System:
The UNT Digital Library
Multiple three-decision rules for 2/sup k/-factorial simple effects. Technical report No. 8
One of the problems confronted in the investigation of environmental health and in biological research more generally is the fact that organisms often respond to combinations of treatments in ways which are not predictable from the way they respond to each of these taken separately. One air pollutant may, for example, disable the respiratory tract's self cleaning mechanisms and thereby increase its sensitivity to the effects of other pollutants. It is important that laboratory experiments be able to simultaneously detect the effects of the various possible combinations of treatments in a way that utilizes the data as effectively as possible. This paper deals with the optimal use of data from such experiments when the response variable can be regarded (possibly after undergoing a suitable transformation) as having a normal distribution with mean determined by the combination of treatments it has undergone.
Date:
March 22, 1977
Creator:
Bohrer, R.; Chow, W.; Faith, R.; Joshi, V. M. & Wu, C. F.
Object Type:
Report
System:
The UNT Digital Library
The Varieties, Quantities, and Purities of Stable Isotopes Which Have Been Concentrated Electromagnetically
None
Date:
March 22, 1948
Creator:
Keim, C.P.
Object Type:
Report
System:
The UNT Digital Library
Exposure of Reactor Structural Materials to Impure Helium at Elevated Temperatures
In the High-temperature Gas-cooled Reactor (HTGR), structural metals will be required to operate at temperatures of 1000 to 1400 deg F in an impure- helium environment for extended periods of time. Six candidate materials for such applications, including nickel alloys and stainless steels, were subjected to simulated reactor environments for times up to 3000 hr to evaluate the extent of corrosion and the changes in mechanical properties occasioned by I such exposures. Under the experimental exposure conditions (helium containing 200 to 300 ppm CO and 200 to 300 ppm H/sub 2/, or helium containing 2000 to 3000 ppm CO and 2000 to 3000 ppm H/sub 2/, at temperatures of 1200 or 1400 deg F), oxidation rather than carburization appears to be the major corrosion process; however, in some cases alternating carburization and decarburization were observed. Measurements of weight gains are described. None of the materials studied exhibited a large change in their mechanical properties after exposures at 1200 deg F. After exposures at 1400 deg F, moderate changes in mechanical properties were observed for all materials except Type 321H stainless steel, which exhibited a large decrease in ductility after l500-hr exposure to the higher impurity concentration. In general, the control …
Date:
March 22, 1962
Creator:
Weinberg, A. F. & Scoffin, J. M.
Object Type:
Report
System:
The UNT Digital Library
The Solubility of Selected Elements in Liquid Plutonium. IV. Evaluation of Sampling Techniques
None
Date:
March 22, 1965
Creator:
Bowersox, D. F. & Leary, J. A.
Object Type:
Report
System:
The UNT Digital Library
MATRIX INVERSION OF IBM 650--PROGRAM 40
None
Date:
March 22, 1956
Creator:
Fairbanks, F.B.
Object Type:
Report
System:
The UNT Digital Library
Uranium miner lung cancer study. Progress report
None
Date:
March 22, 1974
Creator:
Saccomanno, G.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Magnesium Powder as a Source for the Production of Large Area Flash Burns on Pig Skin
None
Date:
March 22, 1956
Creator:
Bales, H. W.; Roth, R. E.; Krolak, L. J. & Pearse, H. E.
Object Type:
Report
System:
The UNT Digital Library
Deviation from flat impact with LLL's two-stage light gas gun due to projectile tilting and distortion
None
Date:
March 22, 1974
Creator:
Mitchell, A. C. & Hord, B. L.
Object Type:
Report
System:
The UNT Digital Library
Input and decayed values of radioactive liquid wastes discharged to the ground in the 200 areas through 1971
None
Date:
March 22, 1973
Creator:
Hanson, G. L.; Anderson, J. D.; Kiel, G. R.; McMurray, B. J. & Nisick, N. P.
Object Type:
Report
System:
The UNT Digital Library
CHEMICAL PROCESSING OF TWO-REGION THERMAL BREEDER REACTORS
None
Date:
March 22, 1956
Creator:
Bruce, F R
Object Type:
Report
System:
The UNT Digital Library
A Sodium-Graphite Reactor Steam-Electric Station for 75 Megawatts Net Generation
The major design features, nuclear characteristics and performance data for a nuclear fueled central station power plant of 75,000 kw net capacity are presented. The heat source is a Na cooled graphite moderated reactor. The design of the reactor takes full advantage of the experience gained to date on the Sodium Reactor Experiment (SRE); the plant described here is a straightforward extension of the smaller experimental SRE, which is now under construction. The fuel elements are made up of rod clusters and the moderator is in the form of Zr canned graphite elements. The performance of the reactor has been based on conservative temperatures and coolant flow velocities which result in a plant with "built-in reserve." Thus, as experience is gained and anticipated improvements in reactor fuel elements and construction materials are proven, the performance of the plant can be increased accordingly. Two reactor designs are described, one for operation with slightly enriched U fuel elements and the other for operation with Th--U fuel elements. The associated heat exchangers, pumps, steam, and electrical generating equipment are identical for either reactor design. An analysis of turbine cycles describes the particular cycle chosen for initial operation and discusses a method by which …
Date:
March 22, 1955
Creator:
Weisner, E. F. & Sybert, W. M.
Object Type:
Report
System:
The UNT Digital Library
Bacillus anthracis genome organization in light of whole transcriptome sequencing
Emerging knowledge of whole prokaryotic transcriptomes could validate a number of theoretical concepts introduced in the early days of genomics. What are the rules connecting gene expression levels with sequence determinants such as quantitative scores of promoters and terminators? Are translation efficiency measures, e.g. codon adaptation index and RBS score related to gene expression? We used the whole transcriptome shotgun sequencing of a bacterial pathogen Bacillus anthracis to assess correlation of gene expression level with promoter, terminator and RBS scores, codon adaptation index, as well as with a new measure of gene translational efficiency, average translation speed. We compared computational predictions of operon topologies with the transcript borders inferred from RNA-Seq reads. Transcriptome mapping may also improve existing gene annotation. Upon assessment of accuracy of current annotation of protein-coding genes in the B. anthracis genome we have shown that the transcriptome data indicate existence of more than a hundred genes missing in the annotation though predicted by an ab initio gene finder. Interestingly, we observed that many pseudogenes possess not only a sequence with detectable coding potential but also promoters that maintain transcriptional activity.
Date:
March 22, 2010
Creator:
Martin, Jeffrey; Zhu, Wenhan; Passalacqua, Karla D.; Bergman, Nicholas & Borodovsky, Mark
Object Type:
Article
System:
The UNT Digital Library
Nebular mixing constrained by the Stardust samples
Using X-ray microprobe analysis of samples from comet Wild 2 returned by the Stardust mission, we determine that the crystalline Fe-bearing silicate fraction in this Jupiter-family comet is greater than 0.5. Assuming this mixture is a composite of crystalline inner solar system material and amorphous cold molecular cloud material, we deduce that more than half of Wild 2 has been processed in the inner solar system. Several models exist that explain the presence of crystalline materials in comets. We explore some of these models in light of our results.
Date:
March 22, 2010
Creator:
OGLIORE, R. C.; WESTPHAL, A. J.; GAINSFORTH, Z.; BUTTERWORTH, A. L.; FAKRA, S. C. & Marcus, Matthew A.
Object Type:
Article
System:
The UNT Digital Library
Energy Efficiency Services Sector: Workforce Size and Expectations for Growth
The energy efficiency services sector (EESS) is poised to become an increasingly important part of the U.S. economy. Climate change and energy supply concerns, volatile and increasing energy prices, and a desire for greater energy independence have led many state and national leaders to support an increasingly prominent role for energy efficiency in U.S. energy policy. The national economic recession has also helped to boost the visibility of energy efficiency, as part of a strategy to support economic recovery. We expect investment in energy efficiency to increase dramatically both in the near-term and through 2020 and beyond. This increase will come both from public support, such as the American Recovery and Reinvestment Act (ARRA) and significant increases in utility ratepayer funds directed toward efficiency, and also from increased private spending due to codes and standards, increasing energy prices, and voluntary standards for industry. Given the growing attention on energy efficiency, there is a concern among policy makers, program administrators, and others that there is an insufficiently trained workforce in place to meet the energy efficiency goals being put in place by local, state, and federal policy. To understand the likelihood of a potential workforce gap and appropriate response strategies, one …
Date:
March 22, 2010
Creator:
Goldman, Charles; Fuller, Merrian C.; Stuart, Elizabeth; Peters, Jane S.; McRae, Marjorie; Albers, Nathaniel et al.
Object Type:
Report
System:
The UNT Digital Library
Noise Performance of the Debuncher Stchastic Cooling Systems
A careful measurement of the system noise performance for all 12 Debuncher stochastic cooling systems has been performed. The opportunity to make the measurement was due to a pickup tank warm up to fix a bad preamplifier. A HP power meter and spectrum analyzer were used to measure the noise power and spectral characteristics of each system. Signals were monitored in the tunnel at the medium level transfer switch, before any variable gain devices. Noise power levels observed ranged between -10 to -30 dBm, which is well within the linear calibration range of the power meter. The noise floor of the power meter was measured to be below -40 dBm. The temperature of the tunnel for the warm measurements was 80 degrees F or 300 Kelvin. The tanks had been at tunnel temperature for weeks when the warm measurement was made. There was no vacuum in the tanks for the warm measurement. The cold temperature of the tanks at liquid helium was 4.5-5 K. 5K was used in the calculations. No component changes were made between the measurements. The gain of the cryogenic amplifier increases with a decrease in operating temperature. The gain of the cryo amplifier was carefully measured …
Date:
March 22, 2001
Creator:
Pasquinelli, Ralph J.
Object Type:
Report
System:
The UNT Digital Library