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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
Partner: UNT Libraries Government Documents Department
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Containment in Cusped Plasma Systems

Description: "A survey of the current theoretical picture of plasma containment in cusped magnetic configurations is presented together with a mention of the points of contact which exist or might soon be made to exist with experiment. A theory of containment was developed which is applicable to the whole range of plasma densities from a tenuous plasma in an essentially vacuum magnetic field to a fully developed plasma which completely excludes the magnetic field from its interior. Also presented are cursor… more
Date: March 30, 1961
Creator: Grad, Harold, 1923-
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
Partner: UNT Libraries Government Documents Department
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The Motion of a Charged Particle Near a Zero Field Point

Description: "The behavior of charged particles in a plasma-free cusp field, or in a cusp field where there is very little plasma, is studied. The numerical computations described may provide a valid picture of the behavior of particles outside such a body of plasma or in the early stages of creation of such a cusped plasma in the low- beta limit. The computations provide a striking illustration of orbits which neither have constant magnetic moment nor behave so irregularly as to defy explanation."
Date: July 15, 1961
Creator: van Norton, Roger
Partner: UNT Libraries Government Documents Department
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Sherwood progress report no. 4, July 1959 - December 1960

Description: "Activities related to Project Sherwood are summarized under the following topics: propagation of waves, macroscopic magneto-fluid dynamics, stability, particle orbits, cusped geometries, collisionless shock theory, and other subjects."
Date: March 1, 1961
Creator: Grad, Harold, 1923-
Partner: UNT Libraries Government Documents Department
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The Effect of Temperature on the Width of a Small-Amplitude, Solitary Wave in a Collision-Free Plasma

Description: "Adlam and Allen and Davis, Lust, and Schluter have studied nonlinear plane-waves, propagating normal to the magnetic field, in a cold plasma. One solution of particular interest is a solitary wave, or single pulse. We present a method for solving the analogous problem for a plasma with finite temperature, in the limiting case where the amplitude of the wave is small and where, consequently, the width of the waver is very large."
Date: March 15, 1961
Creator: Gardner, Clifford S.
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.
Partner: UNT Libraries Government Documents Department
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Fifth Quarterly Progress Report on Fission Product Applications Using Gaseous Beta Sources

Description: "Rates of acetylene polymerization induced by Kr/sup 85/ in d-c fields were up to 15 times greater than those observed when no fields were imposed. Work to determine the relations between acetylene pressure, Kr/sup 85/ concentration, and the field intensity is continuing. In other activities, equipment is being designed to study the effects of megacycle electric fields on radioinduced chemical reactions."
Date: October 31, 1961
Creator: Graessley, William W. & Zufall, John W.
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
Partner: UNT Libraries Government Documents Department
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Description of Method for Determining Geometric Parameters of Surfaces in Contact

Description: "A method and equipment are described for determining the surface parameters of contact required for heat transfer calculations. In this method, the output of a surface analyzer for one surface is recorded on one channel of magnetic tape and the output for the other surface of the contact pair on a second channel. The tape is played back to an analog computer which then integrates the analog voltage to compute the void volume thickness, the number of contact points, and the ratio of metallic co… more
Date: May 2, 1961
Partner: UNT Libraries Government Documents Department
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Comparison of Radiation-Induced Graft Copolymerization Untilizing Electron Accelerators and Isotope Sources as Radiation Initiators

Description: "A brief examination of the post irradiation grafting of machine irradiated polyethylene film with acrylic acid monomer was made. Evidence of postgrafting was detected in samples that had been irradiated to a total dose of 10 Mrads at a dose rate of 0.01 Mrad/sec. and then exposed to a 25% purified acrylic acid solution in benzene for periods of 1 to 4 days."
Date: October 17, 1961
Partner: UNT Libraries Government Documents Department
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Comparison of Radiation-Induced Graft Copolymerization Untilizing Electron Accelerators and Isotope Sources as Radiation Initiators

Description: "A comparison of grafting to two thicknesses of polypropylene film is made using isotope and electron accelerator initiation. The results indicate that the grafting of methacrylic acid: styrene to polypropylene is mainly a surface reaction."
Date: September 12, 1961
Creator: Odian, George; Oliver, William F. & Pierre, Karl
Partner: UNT Libraries Government Documents Department
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Comparison of Radiation-Induced Graft Copolymerization Untilizing Electron Accelerators and Isotope Sources as Radiation Initiators

Description: "Graft polymers were made by Co60 mutual irradiation of mixtures of styrene and methyl acrylate in contact Teflon. These graft copolymers were analyzed by infra-red absorption and their composition determined. The composition of the graft copolymer formed from styrene and methyl acrylate was different from that which is predicted by the copolymer composition equation."
Date: May 8, 1961
Partner: UNT Libraries Government Documents Department
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Comparison of Radiation-Induced Graft Copolymerization Untilizing Electron Accelerators and Isotope Sources as Radiation Initiators

Description: "A comparison of the grafting of a 2:1 molar mixture of methacrylic acid and styrene to both polypropylene film and fabric using CO60 source and electron accelerator as sources of ionizing radiation is made on the basis of mutual or simultaneous grafting and post-irradiation grafting.
Date: January 31, 1961
Partner: UNT Libraries Government Documents Department
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Nuclear Track Image Intensifier

Description: "Design and fabrication techniques were improved so that the large area image intensifier now performs well in image intensifier systems for photographing nuclear tracks. Two successful samples meeting most of the objectives were completed and started in circulation among members of the AEC Image Intensifier Committee for evaluation in systems to record nuclear tracks. Except for a reported long decay in the P-15 phosphor performance was quite good. Resolution, gain, and background requirements… more
Date: March 30, 1961
Creator: DesRochers, R. D. & Stern, H. A.
Partner: UNT Libraries Government Documents Department
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The Sparker, a Divice to Overcome the Multipactor Difficulty in Starting the Oscillator of a Cycloton

Description: "Evacuated electrical oscillating cavities frequently are found to exhibit a strong loading due to electron (or iron) multiplications, the so-called multipactor effect. This effect tends to prevent the buildup of dee voltage in cyclotrons. In conventional cyclotrons driven from external oscillators having their own resonant tank circuits the difficulties are usually slight, but in cyclotrons using a simple dee system as the tank circuit difficulties are encountered in getting the oscillator t… more
Date: January 3, 1961
Creator: Fulbright, H.W.
Partner: UNT Libraries Government Documents Department
open access

A Hooded and Ion Source With a Magnetic Mirror Feature

Description: "The ion source used for hydrogen and deuterium ions in the variable energy cyclotron at the University of Rochester is of the hooded arc type. For the past year it has been operating with a new feature which has greatly improved its performance. The new feature is a magnetic mirror built into the upper end of the arc hood by a simple insertion of a steel bearing ball 1/8" in diameter. The magnetic field gradient near the ball provides a magnetic mirror action on electrons moving up the arc ch… more
Date: January 4, 1961
Creator: Fulbright, H.W.
Partner: UNT Libraries Government Documents Department
open access

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
Partner: UNT Libraries Government Documents Department
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The Relation of Genome Numbers to Radiosensitivity

Description: "This approach to the problem of radiation damage was reported. A comparison of haploid males and diploid females with respect to their radio-sensitivity was made at various stages of embryonic and post-embryonic development. Differences in sensitivity were observed and taken to indicate that genetic damage is involved in the effects of x-rays upon development in Habrobracon juglandis."
Date: 1961
Creator: Clark, Arnold M.
Partner: UNT Libraries Government Documents Department
open access

Bimetallic Casting

Description: "The purposes of the program being conducted under the present contract are: 1) To determine the feasibility of cladding zirconium on uranium by a direct casting process. 2) To investigate the diffusion of liquid metals in the fusion zone."
Date: March 29, 1961
Creator: Krashes, David
Partner: UNT Libraries Government Documents Department
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Inelastic Proton-Proton Scattering At 1.3 Bev

Description: "The understanding of interactions between the elementary particles, which no number thirty, and range from the massless neutrino to the Е with a mass of approximately 1320 Mev, in a prerequisite to the knowledge of the structure of matter. Although the complex aggregate of elementary particles which constitute matter displays properties different from those of the basic building blocks, nevertheless it is impossible to gain a firm knowledge of the behavior of matter without first ascertaining… more
Date: May 1961
Creator: Hien, Nguyen Chi
Partner: UNT Libraries Government Documents Department
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The Lepton Decay Nodes of Hyperons

Description: "In spite of the present scarcity of experimental data it appears likely that the lepton modes of hyperon decay will eventually become an important source of information concerning strangeness-changing weak interactions. In this paper we use dispersion relations to estimate the effect of intermediate meson states upon the lepton decay modes of hyperons."
Date: April 1961
Creator: Harrington, David R.
Partner: UNT Libraries Government Documents Department
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Determination of Particle Size Distribution by X-Ray Absorption

Description: "As it is frequently necessary to know the distribution of particle sizes in various products used in industrial applications, a number of means have been devised for these determinations. Some of them include direct microscopic measurement, screening of product, extraction of samples from a settling slurry as with the Andreasen pipette, air and liquid elutriation, adsorption of gases and liquids, and light absorption."
Date: 1961?
Creator: Gaudin, Antoine Marc, 1900-1974 & Fuerstenau, Maurice C.
Partner: UNT Libraries Government Documents Department
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The Decontamination and Recovery of Precious Metals

Description: "This report is the third quarterly report under Contract AT(30-1)-2528 for the decontamination and recovery of precious metals from contaminated scrap. The results described in [2nd quarterly report] and expanded in this report confirm the statement that the method achieves not only the desired decontamination but also produces a product of high purity. In addition the relative simplicity of the method makes it particularly adaptable to large scale manipulation."
Date: 1961
Creator: Nuclear Materials and Equipment Corporation
Partner: UNT Libraries Government Documents Department
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