Technical Report Archive & Image Library (TRAIL) - 136 Matching Results

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Research and Investigation Leading to Methods of Generating and Detecting Radiation in the 100 to 1000 Micron Wavelength Range of the Spectrum. Quarterly Progress Report No. 15 for 1 September to 1 December 1959

Description: Purpose of this research is twofold:: (1) to uncover new principles or techniques from which a CW source of electromagnetic radiation for the low millimeter and submillimeter wavelength range can be developed; and (2) to develop suitable detectors, components, and measuring techniques for evaluating and using the radiation as a diagnostic tool for plasma physics
Date: January 1, 1960
Creator: Coleman, P. D.; Baird, J. R.; Enderby, C.; Hakki, B;; Kenyon, R. J.; Stafford, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a Gas Injector System for Homogeneously Labeling Gas Storage Reservoirs

Description: "The laboratory experiments and field testing which were carried out in the development of a homogeneous gas labeling device are described. Detailed drawings of the injector and its most critical components are included. Recommendations are made for a production model of the device along with estimated costs of construction."
Date: May 1, 1961
Creator: Sewell, Curtis & Schulz, Isidor
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Iteration Methods for Non-Linear Problems

Description: The methods of successive displacements or relaxation methods are investigated for a class of nonlinear problems. In particular it is shown that these methods are applicable to a large class of nonlinear problems arising from variational problems which yield elliptic equations. Constructive existence and uniqueness theorems are presented for the discrete problem and criteria are given for a practical method of obtaining solutions. The example of a discrete Plateau problem is used to illustrate … more
Date: May 1, 1961
Creator: Schechter, Samuel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Alternating Direction and Semi-Explicit Difference Methods for Parabolic Partial Differential Equations

Description: "The energy method is applied to study the stability of two types of difference approximations to parabolic partial differential equations, the alternating direction methods Douglas, Peaceman, and Rachford, and a new semi- explicit method. Each difference scheme is proved to be unconditionally stable. These results apply to parabolic equations with variable coefficients, defined in cylindrical domains with an essentially arbitrary bounded base."
Date: March 1, 1961
Creator: Lees, Milton
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Some Computational Methods for the Study of Diatomic Molecules

Description: "The present work describes some computer-oriented techniques for the application of the laws of quantum mechanics to the problems of determining basic structure of diatomic molecules. At times, calculations of the type described here yield results which can be compared directly with experiment to check the validity of the hypotheses and technique used they may predict the results of unobserved experimental phenomena; and, in many instances, they provide quantities which are necessary for the … more
Date: May 1, 1961
Creator: Cooley, James W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Some methods of surface analysis for the prediction of thermal resistance of metal contacts

Description: "Equations for the heat-transfer coefficient existing at the interface of two metals in contact are discussed. The results of applying the equations (with a graphical determination of the geometric parameters) to an iron--aluminum contact are presented. A method is given for performing the graphical analysis by means of a general purpose analog computer. Data are included that were obtained by applying this method to Blanchard ground stainless steel surfaces in contact. Statistical analysis was… more
Date: November 1, 1961
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Comparison of Radiation--Induced Graft Copolymerization Utilizing Electron Accelerators and Isotope Sources as Radiation Initiators

Description: "The grafting of methacrylic acid, styrene (2: 1 mole ratio) co-monomer mixture on polypropylene film and fabric, was studied to compare electron accelerators and isotopes as sources of radiation. An aluminum block that contalns i/8-in.-deep pockets covered with Mylar film for holding sample and monomer during mutual irradiatlon was developed. A preliminary comparison was made in post grafting polypropylene film and fabric preirradiated with Cow and with an electron accelerator source. It was f… more
Date: December 1, 1960
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Long Range Correlations in a Closed System With Applications to Nonuniform Fluids

Description: "One of the fundamental concepts of macroscopic physics is that of a homogeneous system. The state of such a system is completely described by a set of intensive parameters which make no reference at all to the size or shape of the system, and by the total number of particles, N (unless otherwise specified we deal with one-component fluid). In actual systems, there are always inhomogeneities due to boundaries and to gravitational body forces."
Date: October 1, 1960
Creator: Lebowitz, J. L. & Percus, J. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Simplified Description of Spherical and Cylindrical Blast Waves

Description: "Investigations into the behavior of the gas flow behind spherical or cylindrical blasts have shown that secondary shocks arise within the original detonation gases. The secondary shock, at first weak, is carried outward with the expanding gases. Subsequently it strengthens and bends back toward the origin, arriving there with high intensity. By using some recently developed techniques in shock dynamics a theory is developed by which the motion of the main shock wave, as well as the formatio… more
Date: August 1, 1960
Creator: Friedman, M. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Singularities of the Riemann Function

Description: "This paper deals with the Riemann function for linear hyperbolic systems of first-order equations. the leading term in the singularity of the Riemann function is determined and interpreted. In addition to equations with distinct characteristics, certain equations with multiple characteristics are treated."
Date: January 1, 1961
Creator: Ludwig, Donald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bimetallic Casting

Description: "Uranium and zirconium were bonded by melting the two metals in contact with one another in a bimetallic casting process. Tensile tests of specimens containing the original zone of interface between the two metals showed that all failures were at locations other than the interface. The coefficients obtained for diffusion between molten uranium and molten zirconium varied from 2.13 cm squared per day at 3,380 degrees F. to 9.17 cm squared per day at 3,510 degrees F. the activation energy for th… more
Date: September 1, 1962
Creator: Poole, Thomas & Krashes, David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement of the Wolfenstein Parameter R at 210 Mev.

Description: "Recent theoretical advances in describing the nucleon-nucleon interaction (particularly in the T=1 state) have emphasized the importance of obtaining an unambiguous experimental determination of the scattering matrix so that the nuclear phase shifts and details of the nuclear potential may be revealed. It is possible to select five experiments, the results of which, in principle at least, determine the scattering matrix and phase shifts uniquely at one energy. Two of these experiments, the cr… more
Date: August 1, 1960
Creator: Gibson, W. A.; England, A. C. (Alan Coulter), 1932-; Heer, E. & Tinlot, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Certain Finite Difference Schemes for the Equations of Hydrodynammics

Description: "We will consider two finite difference schemes for the solution of the Navier-Stokes equations in one space dimension. The first is a method used by Lax and Wendroff. The second method is based on an approximate solution of the centered, implicit difference equations. Since this approximate solution is obtained by successive substitutions, we will refer to this second method as an iterative method."
Date: March 1, 1962
Creator: Gary, John William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Utilization of Radiactive Isotpoes in Coal Process Research

Description: "This is the fourth Quarterly Report on Task II dealing with Methods Development for Radio-Tracing of Coal Product Hydrocarbons With Tritium. The problem of radio-chemical purity of traces is resolved by developing a new method of labeling with tritium that generates essentially no highly tagged side products or impurities."
Date: May 1, 1961
Creator: Yavorsky, P. M. & Gorin, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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First Quarterly Report - The Study of the Potential Applications of Radioisotope Technology to Water Resource Investigations and Utilization

Description: The objective of the study which is being carried out under contract AT(30-1)-2477 is the exploration of all aspects of research in water resources and supply to determine the potential for using radioisotope technology in this research. Problem areas in the application of tracers in this research are being investigated through the evaluation of past experimentation with radioisotopic techniques and through discussions with those who are active in this work. A series of suggestions relating to… more
Date: June 1, 1960
Creator: Isotopes Incorporated
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Theoretical and Experimental Study of Optical Fibers

Description: A geometrical treatment has been used to outline the theoretical properties of optical fibers which are imperfect as well as geometrically and optically perfect. Experiments have been performed to measure some to the optical properties of individual fibers and fiber bundles.
Date: April 1, 1960
Creator: Potter, Robert J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Safety Evaluation of PNPF Modifications

Description: "The purpose of this report is to examine the safety aspects of PNPF restart on continued operation, after completion of the core cleanup and system modifications."
Date: May 1, 1969
Creator: Huntsinger, M. & Hart, R. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Studies on the Current Carrying Capacity of NbZr Wires Under Conditions of Fixed and Swept Magnetic Field

Description: Abstract: The current-carrying capacity of Nb- Zr wire has been studied under conditions of swept magnetic field and fixed wire current and of fixed magnetic field and swept wire current. The effects of wire movement, thermal environment, copper coating of the wire, and rate of sweep of wire current or magnetic field have been determined for these conditions of test.
Date: January 1, 1963
Creator: Laverick, Charles.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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