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Synthesis of Semi-Conductor Materials by Radiation Included in Reactions

Description: "Progress is reported on: design of a continuous flow system for the irradiation of silane using a Cos5 source; pile irradiation of silane samples at elevated temperatures; investigation of materials other than silane, including nonsilicon compounds as well as those containing the silyl group; modification of the existing vacuum system for handling larger quantities of silane as well as increasing the accuracy of the pressure measurements; and use of an electric discharge for the decomposition … more
Date: 1960
Creator: Goldman, Richard & Held, Kelman
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radium and Mesothorium Poisoning and Dosimetry and Instrumentation Techniques in Applied Radioactivity

Description: "The study of the toxicity of Ra and MsTh(Ra/sup 228/) in humans was continued. Several Thorotrast cases were also examined. Physical and clinical studies were made on 151 persons. In all cases possible gamma ray measurements were made of Ra and MsTh decay products retained in the body, alpha -ray measurements of Rn and Rn/sup 220/ in breath, a complete medical history was taken, a complete x-ray examination was made of the skeleton, and urinalysis, hematological, and blood chemistry studies we… more
Date: May 1960
Creator: Evans, Robley D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Annual Progress Report of Methods to Increase Burnout Heat Transfer

Description: "Acoustic energy generated by mechanical or electrical signals and its effect on pool boiling of isopropanol were studied. Daring the course of the investigation, a method was devised to determine the amount of heat-transfer surface wetted by the boiling isopropanol. Plots of heat flux versus temperature difference for each frequency showed that the acoustic energy did not significantly affect the heat flux at burnout, but slightly increased the critical temperature difference. No general effec… more
Date: September 30, 1960
Creator: Markels, Michael; Durfee, Robert L. & Richardson, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Boundary Layer Between a Plasma and a Magnetic Field - I

Description: "The problem of a steady boundary layer or sheath between a plasma and a magnetic field is considered. A self-consistent transition layer is found which joins a uniform magnetic field at plus infinity with a collisionless field-free plasma region with arbitrary velocity distribution at minus infinity, i.e., a magnetic field profile is found such that the exact particle orbits in this field produce a current which gives rise to this field. An interesting feature of the solution is that, with any… more
Date: December 28, 1960
Creator: Grad, Harold, 1923-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Green's Function for Two-Dimensional Magnetohydrodynamic Waves. II

Description: "As an extension of an earlier paper the Green's function is evaluated for the Lundquist equation linearized about uniform magnetic field, constant matter density, and zero flow velocity. It is assumed that all quantities are functions of two space variables and time only. In the general magnetic field configuration considered here a pure Alfvén disturbance no longer exists; there is instead a wave with properties of both the Alfvén and fast‐slow disturbance."
Date: December 15, 1960
Creator: Weitzner, Harold
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Algorithm for Construction Feasible Schedules and Computing Their Schedule Times

Description: "An algorithm for the generation of feasible schedules and the computation of the completion times of the job operations of feasible schedule is presented. Using this algorithm, the distribution of schedule times over the set of feasible schedule—or a subset of feasible schedules—was determined for technological orderings that could occur in a general machine shop. These distributions are found to be approximately normal. Biasing techniques corresponding to “first come first serve,” random choi… more
Date: November 15, 1960
Creator: Heller, Jack & Logemann, George
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some Problems in Linear Graph Theory That Arise in the Analysis of the Sequencing of Jobs Through Machines

Description: "The problems of sequencing jobs through machines are discussed in a linear graph framework. The construction of feasible schedules from given technological orderings is related to the construction of transitive graphs from given component graphs. Methods of constructing transitive graphs are given and bounds on the number of different transitive graphs constructed from given components are determined. A recursive convex function defined on the transitive graphs-the job operation completion tim… more
Date: October 15, 1960
Creator: Heller, Jack
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
open access

Nuclear Track Image Intensifier

Description: "The design of the nuclear track intensifier was further analyzed to compare performance with design objectives. A preliminary analysis of the electron optics showed that the tube design suffers a small degree of astigmatism, which is increased in actual tabes by misalignment of parts, One tube was successfully completed and tested. Transit time of electrons from cathode to screen was determined to be 2.5 x 10/sup -8/ sec, 0.5 x 10/sup -8/ sec. Decay characteristics of several standard phosphor… more
Date: December 30, 1960
Creator: DesRochers, R. D.; Stern, H. A. & Ezard, L. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nuclear Track Image Intensifier

Description: "Development of a nuclear track image intensifier which is to have a cathode dia. of 83 in. and an output screen dia. of 1 in. is reported. Spherical faceplates for the intensifier which were etched to a thickness of 0.025 in. over a dia. of 80 in. withstood a pressure differential of 2 atm. Techniques were developed to measure spectral energy distribution, phosphor burn characteristics, phosphor efficiency, and phosphor persistence. Thallium- activated RbI and CsI were evaluated for use in the… more
Date: September 30, 1960
Creator: DesRochers, R. D.; Stern, H. A. & Ezard, L. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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
open access

The Numerical Solution of a Parabolic System of Differential Equations Arising in Shallow Water Theory

Description: "A finite difference approximation to a non-linear set of parabolic differential equations arising in shallow water theory is given. These difference equations were used to determine the shape and rate of propagation of a hum of fluid down a channel of constant depth. The hump of fluid was found to spread instead of steepen, as is the case in the usual shallow water theory."
Date: October 15, 1960
Creator: Heller, Jack & Isaacson, Eugene
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Theory of Cusped Geometries

Description: "The loss of particles through a cusp of a particular containment geometry utilizing cusped magnetic field lies is considered. A velocity space loss criterion analogous to the loss cone in the mirror machine is derived. The effect of a uniform longitudinal magnetic field perpendicular to the containing field is considered and a loss criterion is derived. The effect of the longitudinal field is to decrease cusp losses.
Date: November 15, 1960
Creator: Kileen, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Equilibrium Configuration of a Plasma in the Guiding Center Limit

Description: "We compute the equilibrium configuration of a collision-free plasma contained in an axially symmetric magnetic field. The plasma is characterized by a non-scalar pressure tensor which is obtained from a microscopic distribution function in a form suggested b the guiding center approximation. The solution is calculated in the limit where the ratio of the width to the length of the plasma region and the ratio of the gas to the magnetic pressure are both small. Boundary values at the midplane … more
Date: September 15, 1960
Creator: Oppenheim, Alan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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
open access

Lung Hazards From Inhaled Radioactive Particulate Matter

Description: Conclusions from the study: "Radioactive dusts are carcinogenic, and can cause cancer of the lung. complete dose response curves have not yet been determined. All the parameters that render this demonstrably toxic material (radioactive dust) have not yet been evaluated. It is strongly suggested by the experimental data that duration of radiological insult to the lung is an important factor in eliciting lung cancer. The atmospheric tolerance concentrations now in use seem to afford little marg… more
Date: September 14, 1960
Creator: Cember, Herman
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preparaion of a Substance for the Prevention of Vascular Damage Due to Radiation

Description: "In our original proposal it was pointed out that we had obtained, b the successive treatment of adrenochrome with mineral acid and thiosemicarbazide, a black material which proved to be effective in preventing vascular damage cause by snake venom, radiation and thermal burns. Since the effectiveness of this preparation varied widely with different samples it was suspected that the product did not have a uniform composition. As a results of the inability of effect a separation or purification o… more
Date: November 1960
Creator: Mason, J. Phillip & Shulman, Maurice H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

568 Report

Description: Final report for a grant contract documenting information about the scope of the project and results.
Date: 1960
Creator: Pollard, Ernest C. (Ernest Charles), 1906-1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Respiratory Protective Equipment, Progress Report for June 1959 to April 1960

Description: "Dust and gas masks and respirators have been an effective method under certain environmental conditions to reduce the inhalation of toxic aerosols. Under many conditions, however, their efficacy has been seriously questioned. It is the purpose of this study to evaluation over-all respirator performance on fine aerosols and to develop equipment whereby a greater degree of respiratory protection may be assured with reliability for highly toxic atmospheres."
Date: June 27, 1960
Creator: Silverman, Leslie; Fitzgerald, J. J., (Joseph James), 1919-; Burgess, William A.,1924-; Corn, Morton & Stein, Felix
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Elastic Scattering of Negative Pions by Protons at 226 MEV

Description: "In 1935, Yukawa proposed that a field must exist, analogous to the electromagnetic field but different in nature, which is responsible for the attraction between a proton and a neutron in a nucleus. He was led to the prediction of the existence of particles, quanta of this field, with mass intermediate between that of the electron and proton. In 1947, using photographic plates, the Bristol group led by Powell confirmed the existence of these particles, meons."
Date: December 1960
Creator: Kellman, Simon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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