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Potamilus purpuratus, Specimen #668

Description: One preserved mussel specimen including the right valve only. The specimen exhibits an oval shape; thick shell; pink internal coloring; brown external coloring; no external sculpturing. Collected in the Brazos basin. The specimen measures over 120 mm in length and was assessed to be relatively-recently dead when collected.
Date: May 28, 1973
Creator: Falzarano, D.
Partner: Elm Fork Natural Heritage Museum

Leptodea fragilis, Specimen #508

Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits a rhomboidal shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. Collected in the Brazos basin. The specimen measures between 60 - 100 mm in length and was assessed to be long dead when collected.
Date: May 28, 1973
Creator: Falzarano, D.
Partner: Elm Fork Natural Heritage Museum

Fusconaia sp., Specimen #252

Description: One preserved mussel specimen including the right valve only. The specimen exhibits a round shape; moderately thick shell; single looped beak sculpturing; white internal coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be subfossil when collected.
Date: May 28, 1973
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

Fusconaia sp., Specimen #253

Description: One preserved mussel specimen including the right valve only. The specimen exhibits a triangular shape; moderately thick shell; single looped beak sculpturing; white internal coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be subfossil when collected.
Date: May 28, 1973
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

Fusconaia sp., Specimen #254

Description: One preserved mussel specimen including the right valve only. The specimen exhibits a triangular shape; moderately thick shell; single looped beak sculpturing; white internal coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be subfossil when collected.
Date: May 28, 1973
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

Fusconaia sp., Specimen #255

Description: One preserved mussel specimen including the right valve only. The specimen exhibits a triangular shape; moderately thick shell; single looped beak sculpturing; white internal coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be subfossil when collected.
Date: May 28, 1973
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

Fusconaia sp., Specimen #256

Description: One preserved mussel specimen including the left valve only. The specimen exhibits a round shape; moderately thick shell; single looped beak sculpturing; white internal coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be subfossil when collected.
Date: May 28, 1973
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

HTGR base program quarterly progress report for the period ending August 31, 1973

Description: The High-Temperature Gas-cooled Reactor (HTGR) work reported includes studies of basic fission-product distribution mechanisms, recycle fuel studies (including designing and testing of recycle test elements) and exploration of head-end reprocessing methods (as part of a national recycle plan and of a recycle fuel plan), and physics and fuel management studies. Materials studies include irradiation and analysis of fuel particles in capsules to evaluate fuel systems, and basic studies of control materials and of carbon and graphite. Experimental procedures and results are discussed and, where appropriate, the data are presented. (auth)
Date: September 28, 1973
Partner: UNT Libraries Government Documents Department

HTGR Base Program. Quarterly progress report for the period ending November 30, 1973

Description: The High-Temperature Gas-cooled Reactor (HTGR) work reported includes studies of basic fission-product distribution mechanisms, recycle fuel studies (including designing and testing of recycle test elements) and exploration of head-end reprocessing methods (as part of a national recycle plan and of a recycle fuel plan), and physics and fuel management studies. Materials studies include irradiation and analysis of fuel particles in capsules to evaluate fuel systems, and basic studies of control materials and of carbon and graphite. Experimental procedures and results are discussed and, where appropriate, the data are presented. (auth)
Date: December 28, 1973
Partner: UNT Libraries Government Documents Department

Review of Soviet data on the peaceful uses of nuclear explosions

Description: Over the last several years through a series of international meetings sponsored by the International Atomic Energy Agency (IAEA) and a number of publications, the Soviet union has disclosed that they have a very active program for developing peaceful uses of nuclear explosions (PNE) in their rational economy. They have described the results of 14 experimental and industrial explosions designed to develop nine different applications in the petroleum, gas, and minerals industries as well as for water resources development. However, when one considers large number of large unidentified seismic events that have been reported over the last seven years in areas of the Soviet Union outside the normal nuclear-weapon test areas, it is obvious that they have an even more active program than they have publicly described, one that must be approaching a routine industrial technology in some areas. The PNE program that the Soviets have publicly discussed in various reports and at various meetings is summarized and, when appropriate, compared to data from the US Plowshare Program. (auth)
Date: June 28, 1973
Creator: Nordyke, M.D.
Partner: UNT Libraries Government Documents Department

Mechanical properties of Nugget sandstone

Description: The mechanical properties of Nugget sandstone have been determined from a number of independent measurements at pressures up to 30 kbar. Pressure- volume, strength, uniaxial stress, and uniaxial strain tests yield the failure surface and effective moduli as a function of stress state, i.e., mean pressure and shear stress. Acoustic velocity determinations provide the effective moduli for low-amplitude dynamic waves. At atmospheric pressure the initial effective bulk modulus in tests with applied differential stresses (~40 kbar) differs from that determined hydrostatically (23 kbar). This and a large pressure derivative of the shear modulus at low pressure are believed to be due to an abundance of cracks with low aspect ratios. The initial effective shear modulus of about 55 kbar increases rapidly with the closing of cracks. At 1 kbar confining pressure, a shear modulus of about l20 kbar is determined in both uniaxial stress and uniaxial strain experiments. The rock has an ultimate strength comparable to granite (1.2 kbar unconfined) and exhibits brittle behavior at failure to the highest mean pressure studied (14 kbar). Failure is preceded by dilatant behavior. (auth)
Date: August 28, 1973
Creator: Schock, R.N.; Abey, A.E.; Bonner, B.P.; Duba, A. & Heard, H.C.
Partner: UNT Libraries Government Documents Department

Free-energy approach to computing dynamic phase change in materials

Description: The free energy approach to calculating dynamic phase change is described. It is assumed that the driving force for the transition is the difference in the Gibbs free energy for the phases present in the material. To demonstrate the validity of the theory, the model is applied to delta -phase plutonium. (auth)
Date: November 28, 1973
Creator: Kamegai, M.
Partner: UNT Libraries Government Documents Department

Recovery of nitric acid from raffinate and condensate solutions by steam distillation/pyrohydrolysis and fractional distillation in a glass column

Description: Potential processes for the pilot-plant-scale purification and concentration of nitric acid condensate and raffinate solutions were studied. As a result, a process was developed where condensates were continuously purified by an aluminum nitratecalcium nitrate trap to reduce 200 to 300-ppM fluoride concentrations to <1 ppM. Next, the condensates were fed to an all-glass rectification column to concentrate nitric acid to 14 molar and to reduce 200 10 400-ppM chloride concentrations to <1 ppM. Finally, raffinates were steam distilled and pyrohydrolyzed to recover >90% of the nitrates as nitric acid. (auth)
Date: December 28, 1973
Creator: Dietrich, W.C.
Partner: UNT Libraries Government Documents Department

Computer simulation studies of parabolic interpolation circuitry

Description: A computer-simulation study of parabolic interpolation circuitry for machine tool controllers was completed. Results showed that a tool center can be moved along any parabolic arc to within any realistic tolerance. Circuit design requirements were determined and input data required by the parabolic interpolators were defined. Simulation results showed that tool motion along a pronounced parabolic path would stay within a 1/2-microinch tolerance. An application of the parabolic interpolation toward reducing the large input data volumes required by conventional numerical controllers was achieved. (auth)
Date: December 28, 1973
Creator: Davenport, C.M.
Partner: UNT Libraries Government Documents Department

1964 computer run on a laser-imploded capsule

Description: WAZER Alchemy 7b (WA-7b) is a WAZER calculation of a laser-driven micro-implosion of a spherical capsule consisting of a thin gold pusher surrounded by a thick (frozen) deuterium ablator. The properties of the target capsule and the shape of the laser pulse used to irradiate it are described.
Date: March 28, 1973
Creator: Kidder, Ray E.
Partner: UNT Libraries Government Documents Department

Temporal observations of the lambda5303 emission line profile during the 74 minute totality from the Concorde SST at the 30 June 1973 total solar eclipse: preliminary intensity variations above an active region

Description: From international astronomical union symposium on coronal disturbances; Surfers Paradise, Australia (3 Sep 1973). Apparatus was designed for installation on the Concorde SST to provide high resolution emission line profiles at the June 30, 1973 total solar eclipse. A prime objective was to obtain profiles that could be used to detect the coronal response to the 5 min periodicities observed in the solar photosphere. Stability of the sky scattered light, drastic reduction of seeing effects enhanced the value of the exceptional opportunity. Preliminary results are discussed for a single region on the limb, above an active sunspot group. (auth)
Date: August 28, 1973
Creator: Liebenberg, D.H. & Hoffman, M.M.
Partner: UNT Libraries Government Documents Department

Operational experience with the multipass 16-disc long path laser system

Description: A brief summary is given of the operational and maintenance requirements for the Livermore long path&#x27;&#x27; laser system--the first short pulse neodymium ( lambda = 1.06 mu m) glass disc laser system. It is being issued at this time because the system is presently scheduled to be shut down at the end of the calendar year 1973. If the hardware is then put on the surplus equipment list, it would be useful for the future owner to have such information. (auth)
Date: September 28, 1973
Creator: Shearer, J. W. & Swain, J. E.
Partner: UNT Libraries Government Documents Department

Calculation of resonance self shielding in $sup 235$U

Description: Analytic and Monte Carlo calculations of the Bramblett- Czirr /sup 235/U transmission experiment STANuc!. Sci. Eng. 35, 350-357 (1969)! were performed. The numbcr of fissions from the uncollided flux could be calculated as a function of depth. The results of experiment and Monte Carlo calculations are tabulated and plotted; fission and total cross sections for /sup 235/U are shown. In view of the agreement between the analytic and Monte Carlo calculations, it appeared that the ENDF/B-III cross sections were inadequate to calculate the Czirr-- Bramblett experiment. (3 figures, 2 tables) (RWR)
Date: June 28, 1973
Creator: Plechaty, E. F. & Cullen, D. E.
Partner: UNT Libraries Government Documents Department

Encapsulation of high-purity germanium detectors

Description: The encapsulation of high-purity germnium detectors is very desirable in order to increase their versatility and reliability. However, rapid and extensive degradation is seen for all detectors made from detector grade crystals which are encapsulated in a simple vacuum. Extensive studies have shown that the cause of this degradation is hydrogen adsorption on the detector surface. There it causes the formation of a strong p/sup +/ inversion layer which in turn shunts the detector junction. Reliable encapsulation is shown to be achievable by the use of hydrogen-free germanium crystals. (auth)
Date: June 28, 1973
Creator: Armantrout, G.A.; Wichner, R. & Swierkowski, S.P.
Partner: UNT Libraries Government Documents Department