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174
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145
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46
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34
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Balanced Dairying: Economics, Volume 20, Number 2, June 2000
Newsletter of the Texas Agricultural Extension Service discussing topics related to economic aspects of raising dairy cows, dairy production, and managing dairy operations.
Date:
June 12, 2000
Creator:
Texas Agricultural Extension Service
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
A Method for Determining the Optimum Dimensional Parameters of a Scalloped Channel so as to Minimize Fuel-Element Bowing in a Septafoil Arrangement
The use of a scalloped cross-sectional coolant channel has been suggested as possible solution of the fuel-element bowing problem inherent in the septafoil type of geometry. Using simplified assumptions, a method has been developed for calculating the rod spacing and scallop size necessary to produce equal average fuel-element surface temperatures in the central and peripheral regions of the coolant flow channel at the mid-section of each fuel-rod cluster under a given set of reactor flow conditions. Since the extent of row-bowing is related to the surface temperature distribution, this requirement should minimize fuel-element deflection.
Date:
June 12, 1959
Creator:
Wantland, J. L. & Kidd, G.J. Jr.
Object Type:
Report
System:
The UNT Digital Library
Resonance Integral Calculations for Evaluation of Doppler Coefficients: The Rapture Code
A code (RAPTURE) was programmed for the Philco TRANSAC 2000 computer to perform calculations needed for the evaluation of Doppler Coefficients in fast reactors with degraded neuron spectra. This code computes resonance integrals, averages them over resonance parameter distributions, and computes fission and capture cross sections as a function of fuel temperature and of potential scattering cross section per absorber isotope.
Date:
June 12, 1962
Creator:
Ferziger, Joel H.; Greebler, P.; Kelley, M. D. & Walton, J. W.
Object Type:
Report
System:
The UNT Digital Library
Laboratory Development of the Thorex Process
Changes made in the Thorex process flowsheet were a decrease in the extraction column acidity to decrease thorium losses and the addition of a second thorium solvent-extraction cycle to provide the increased decontamination required when thorium irradiated to 2000-4000 g of U233 per ton is processed. Bonded slugs could not be dissolved by the Thorex flowsheet procedure. Various laboratory scale studies on feed preparation, first-cycle variables, and radiation damage to the solvent are reported.
Date:
June 12, 1956
Creator:
Wischow, R. P. & Mansfield, R. G.
Object Type:
Report
System:
The UNT Digital Library
Limitations on Bore, Entering Beam, and Voltage Gradients in the Strong Focusing Linear Accelerator. II.
This is an extension of the results reported in UCRL-2203, where bore diameter is determined in a linear accelerator.
Date:
June 12, 1953
Creator:
Good, Myron L. & Smith, Lloyd
Object Type:
Report
System:
The UNT Digital Library
Plaster of Paris Replicas of Reactor Fuel Slugs
A method is described for preparing plaster of Paris replicas of irradiated fuel slugs. An impression mold is made by pouring the plaster about a fuel slug held in a specially designed holder. The slug is removed from the holder and the impression mold issued to cast a replica, also made of plaster of Paris. The replicas, including one end only, are accurate reproduction of the original slug for surface features down to about one-half mil and for dimensions within one or two mills. Two dental impression plasters were found to give satisfactory results. With the limits mentioned, the process will serve the purpose of preserving models of radioactive specimens for use as "museum pieces." However, the procedures are very exacting in achieving such results.
Date:
June 12, 1953
Creator:
Deily, George J.
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 45, Number 24, Pages 3937-4124, June 12, 2020
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
June 12, 2020
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Pressed Metal Wheel
Patent for improvements to pressed metal wheels. This improvement is directed at the assembly and securing of hub members attached to the wheel.
Date:
June 12, 1916
Creator:
Simmons, O.G.
Object Type:
Patent
System:
The Portal to Texas History
Door Fastener
Patent is for door locking device for fasteners that can be carried around in a pocket. It is an improvement on models in circulation.
Date:
June 12, 1917
Creator:
Price, John
Object Type:
Patent
System:
The Portal to Texas History
Analysis of submarginal ore, Fawn Springs area, Bull Canyon District, San Miguel and Montrose Counties, Colorado
During a compilation of ore reserves at Bull Canyon, it was apparent from the grade of submarginal mineralization that this material might be a low-grade reserve of importance. Mr. Lewis Hazen requested a memorandum of the results of the analysis; this memorandum is a response to that request.
Date:
June 12, 1953
Creator:
Garbrecht, Louis
Object Type:
Report
System:
The UNT Digital Library
86th Texas Legislature, Regular Session, House Bill 3, Chapter 943
Bill introduced by the Texas House of Representatives relating to public school finance and public education; creating a criminal offense; authorizing the imposition of a fee.
Date:
June 12, 2019
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
86th Texas Legislature, Regular Session, Senate Bill 2, Chapter 944
Bill introduced by the Texas Senate relating to ad valorem taxation; authorizing fees.
Date:
June 12, 2019
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
The Preparation and Properties of Molybdenum(IV) Bromide
From abstract: "The preparation of pure molybdenum(IV) bromide was accomplished conveniently by the reaction between molybdenum(III) bromide and liquid bromine at ca. 55°. Molybdenum(IV) bromide was found to be soluble in liquid bromine, and this property was utilized to separate and purify the molybdenum(IV) bromide. The solution of MoBr4 in bromine was a poor electrical conductor. No evidence was found for the formation of MoBr4 from MoBr3 and bromine vapor at 2-4 atm. and temperatures from 180 to 400°. However, MoBr4 was completely decomposed at 110-130°, in vacuo, with formation of MoBr3 and bromine."
Date:
June 12, 1962
Creator:
Carnell, P. J. H. & McCarley, R. E.
Object Type:
Report
System:
The UNT Digital Library
A Mass Spectrograph for the Analysis of Fission Product Mixtures
From introduction: "The analysis of mixtures of fission products with a mass spectrograph offers certain advantages. A chemical separation of the fission products found in the solution at Hanford is not necessary with the mass spectrograph technique. A sample of the mixtures can be placed on the sample holder and then the sample holder is mounted in the mass spectrograph. This reduces the amount of handling of the active solutions to one relatively simple and short operation. The health hazards involved in the analysis can be further reduced by increasing the efficiency of the spectrograph as much as possible, thus making possible an analysis of a sample of lower total activity. The mass spectrograph described here is an attempt to realize the advantages pointed out above. Particular attention has been given to increasing the increasing the efficiency of the instrument."
Date:
June 12, 1946
Creator:
Lewis, Lloyd G., 1917-
Object Type:
Report
System:
The UNT Digital Library
Some aspects of the mechanism of bacteriophage function. Final progress report. [Mechanisms of inactivation of bacteriophages by ionizing radiation]
Data are summarized from a ten-year study on the radiobiology of phages. The results showed that: phages are inactivated principally by damage to DNA; DNA damage is of two types, base damage and double-strand breakage; double-strand breakage may be lethal because of interruption within a gene, however in phage systems the damage is more fundamental in that only a single DNA fragment is injected into the host; E. coli phage T4 is relatively resistant to inactivation by x-rays; and the rate of production of strand breaks and base damage is nearly the same in bacteriophage and bacteria.
Date:
June 12, 1977
Creator:
Freifelder, D.
Object Type:
Report
System:
The UNT Digital Library
Characterization of embryo-specific genes
The objective of the proposed research is to characterize the function and regulation of a set of embryonic genes which are expressed in the embryos, not in the plants. 22 cDNA clones were isolated from a cDNA library we constructed using mRNAS of -carrot somatic embryos. These cDNA clones identified mRNA species that are present in the somatic and zygotic embryos, but not in adult plants. The sequence of all 22cDNA clones were determined; genomic clones for three cDNA clones, DC8, DC59, and DC49 were isolated and gene sequences determined. DC8, DC49, and several other genes identified by the cDNA sequences belong to the category of late embryogenesis abundant protein genes, Lea. The function of these gens have not yet been determined, but they share common structural features, are regulated by ABA and are speculated to play a role in seed desiccation.
Date:
June 12, 1992
Creator:
Sung, R.
Object Type:
Report
System:
The UNT Digital Library
TMAP4 User's Manual
The Tritium Migration Analysis Program, Version 4 (TMAP4) has been developed by the Fusion Safety Program at the Idaho National Engineering Laboratory (INEL) as a safety analysis code, mainly to analyze tritium retention and loss in fusion reactor structures and systems during normal operation and accident conditions. TMAP4 incorporates one-dimensional thermal- and mass-diffusive transport and trapping calculations through structures and zero dimensional fluid transport between enclosures and across the interface between enclosures and structures. A key feature is the ability to input problem definition parameters as constants, interpolation tables, or FORTRAN equations. The code is specifically intended for use under a DOS operating system on PC-type mini-computers, but it has also been run successfully on workstations and mainframe computer systems. Use of the equation-input feature requires access to a FORTRAN-77 compiler and a linker program.
Date:
June 12, 1992
Creator:
Longhurst, G. R.; Holland, D. F.; Jones, J. L. & Merrill, B. J.
Object Type:
Report
System:
The UNT Digital Library
Texas Turkey Poults: For Week Ending June 7, 1980
Weekly report of the Texas Crop and Livestock Reporting Service on turkey poult numbers in Texas and compared with other states. It includes compiled statistics across six consecutive weeks during two years for turkey eggs set and poults hatched.
Date:
June 12, 1980
Creator:
Texas Crop and Livestock Reporting Service
Object Type:
Report
System:
The Portal to Texas History
Measurement of Ultra Low Outgassing Rates for NLC UHV Vacuum Chambers
Ultra low outgassing rates would be highly advantageous in accelerators and storage rings, such as the Next Linear Collider (NLC), where an outgassing rate of <10{sup -12} Torr liter/sec/cm{sup 2} could eliminate the need for costly distributed pumping. Measuring such low outgassing rates at room temperature has many difficulties. However, by inspection of Fick's law, it can be seen that thermal desorption is proportional to outgassing rate. It is commonly observed that the outgas rate doubles approximately every 15 C for temperatures under 100 C. By measuring outgassing rate versus temperature and time and extrapolating back to room temperature we can measure outgassing rates that would otherwise be difficult to make. To produce a reliable measurement also requires the total surface area under study to be approximately an order of magnitude greater than the area of the measurement chamber walls. To accomplish this, 27 plates of 5083 aluminum were placed in the measurement chamber. This technique will be the basis for future investigation of outgassing rates of other sample plates fabricated with different machining and cleaning techniques.
Date:
June 12, 2001
Creator:
Kishiyama, K.; Shen, S.; Behne, D.; Corlett, J. N.; Atkinson, D.; Kennedy, K. et al.
Object Type:
Article
System:
The UNT Digital Library
What is a Shock Wave to an Explosive Molecule?
An explosive molecule is a metastable chemical species that reacts exothermically given the correct stimulus. Impacting an explosive with a shock wave is a ''wake-up call'' or ''trigger'' which compresses and heats the molecule. The energy deposited by the shock wave must be distributed to the vibrational modes of the explosive molecule before chemical reaction can occur. If the shock pressure and temperature are high enough and last long enough, exothermic chemical decomposition can lead to the formation of a detonation wave. For gaseous, liquid, and perfect single crystal solid explosives, after an induction time, chemical reaction begins at or near the rear boundary of the charge. This induction time can be calculated by high pressure, high temperature transition state theory. A ''superdetonation'' wave travels through the preshocked explosive until it overtakes the initial shock wave and then slows to the steady state Chapman-Jouguet (C-J) velocity. In heterogeneous solid explosives, initiation of reaction occurs at ''hot spots'' created by shock compression. If there is a sufficient number of large and hot enough ''hot spots,'' these ignition sites grow creating a pressure pulse that overtakes the leading shock front causing detonation. Since the chemical energy is released well behind the leading …
Date:
June 12, 2001
Creator:
Tarver, Craig M.
Object Type:
Article
System:
The UNT Digital Library
BBU and Corkscrew Growth Predictions for the DARHT Second Axis Accelerator
The second axis accelerator of the Dual Axis Radiographic Hydrodynamic Test (DARHT-II) facility will produce a 2-kA, 20-MeV, 2-{micro}s output electron beam with a design goal of less than 1000 {pi} mm-mrad normalized transverse emittance. In order to meet this goal, both the beam breakup instability (BBU) and transverse ''corkscrew'' motion (due to chromatic phase advance) must be limited in growth. Using data from recent experimental measurements of the transverse impedance of actual DARHT-II accelerator cells by Briggs et al., they have used the LLNL BREAKUP code to predict BBU and corkscrew growth in DARHT-II. The results suggest that BBU growth should not seriously degrade the final achievable spot size at the x-ray converter, presuming the initial excitation level is of the order 100 microns or smaller. For control of corkscrew growth, a major concern is the number of ''tuning'' shots needed to utilize effectively the ''tuning-V'' algorithm. Presuming that the solenoid magnet alignment falls within spec, they believe that possibly as few as 50-100 shots will be necessary to set the dipole corrector magnet currents. They give some specific examples of tune determination for a hypothetical set of alignment errors.
Date:
June 12, 2001
Creator:
Chen, Y. J. & Fawley, W. M.
Object Type:
Article
System:
The UNT Digital Library
Domain Walls in Random Field Ising Magnets: Wetting
Domain walls in random-field Ising magnets can be investigated in groundstates into which walls are induced by prepared boundary conditions. We outline recent progress, and new results on (domain wall) wetting in random field systems. This is studied in fixed disorder configurations in the presence of an external field, which is varied.
Date:
June 12, 2003
Creator:
Seppala, E T; Alava, M J & Sillanpaa, I J
Object Type:
Article
System:
The UNT Digital Library
Sets of Reports and Articles Regarding Cement Wastes Forms Containing Alpha Emitters that are Potentially Useful for Development of Russian Federation Waste Treatment Processes for Solidification of Weapons Plutonium MOX Fuel Fabrication Wastes for
This is a set of nine reports and articles that were kindly provided by Dr. Christine A. Langton from the Savannah River Site (SRS) to L. J. Jardine LLNL in June 2003. The reports discuss cement waste forms and primarily focus on gas generation in cement waste forms from alpha particle decays. However other items such as various cement compositions, cement product performance test results and some cement process parameters are also included. This set of documents was put into this Lawrence Livermore National Laboratory (LLNL) releasable report for the sole purpose to provide a set of documents to Russian technical experts now beginning to study cement waste treatment processes for wastes from an excess weapons plutonium MOX fuel fabrication facility. The intent is to provide these reports for use at a US RF Experts Technical Meeting on: the Management of Wastes from MOX Fuel Fabrication Facilities, in Moscow July 9-11, 2003. The Russian experts should find these reports to be very useful for their technical and economic feasibility studies and the supporting R&D activities required to develop acceptable waste treatment processes for use in Russia as part of the ongoing Joint US RF Plutonium Disposition Activities.
Date:
June 12, 2003
Creator:
Jardine, L J
Object Type:
Report
System:
The UNT Digital Library
Modeling of an Inductive Adder Kicker Pulser for a Proton Radiography System
An all solid-state kicker pulser for a proton radiography system has been designed. Multiple solid-state modulators stacked in an inductive-adder configuration are utilized in this kicker pulser design. Each modulator is comprised of multiple metal-oxide-semiconductor field-effect transistors (MOSFETs) which quickly switch the energy storage capacitors across a magnetic induction core. Metglas is used as the core material to minimize loss. Voltage from each modulator is inductively added by a voltage summing stalk. A circuit model of a prototype inductive adder kicker pulser modulator has been developed to predict the performance of the pulser modulator. The modeling results are compared with experimental data.
Date:
June 12, 2001
Creator:
Wang, L.; Caporaso, G. J. & Cook, E. G.
Object Type:
Article
System:
The UNT Digital Library