From introduction: The purpose of this paper is to give an alternative presentation of the same information presented by the 66 Cartesian graphs of shape perimeter values presented by Rosinski. The 66 graphs have been reduced to 4.

ABS>A method for determination of submicrogram quantities of Al in reactor cooling water by neutron activation analysis is described. Data obtained in analyses of samples from the OKR and the Bulk Shielding Reactor are included. (J.R.0.)

From Introduction: "The concept of supersonic combustion is by no means new, although little work appears to have been published on the subject. For example, an analysis of supersonic combustion to provide lift under a wing is given in reference 1. Reference 2 discusses applications to hypersonic ramjets being studied at the University of Michigan."

From Introduction: "In reference 1 results of creep tests and empirical method for predicting collapse times are presented for plates loaded in compression on two opposite edges and with the remaining edges unloaded and supported in V-groove fixtures. Other approximate methods for handling plates having types of edge support are suggested in reference 2; however, experimental verification for these methods is quite limited. In reference 3 an analysis based on small-deflection theory is made of the creep deflection of a simply supported plate composed of a linear viscoelastic material - that is, a material in which the stress and strain and their appropriate time derivatives are related in a linear fashion."

From Introduction: "In reference 1, wall temperature distributions for turbulent flow in rectangular and triangular ducts were calculated by using experimental velocity distributions and average heat-transfer coefficients, together with assumed similarity of the wall heat-transfer and wall shear-stress variations; no attempt was made to calculate either the heat-transfer coefficients or the velocity and temperature distributions in the fluid field. Some calculations of velocity and shear-stress distributions in corners are reported in reference 2."

Note presenting an analysis made for predicting temperature recovery factors for fully developed flow in a tube. Most of the attention was confined to turbulent flow. Both analytical and experimental results are provided for the air flow.

From Introduction: "The many physical processes which occur simultaneously in rocket combustion make the entire process extremely complex (ref. 1). The combustion chamber length required for evaporation of liquid-propellant sprays has already been studied (refs. 2, 3, and 4)."

The method of coordinate perturbation is applied to the unsteady flow of a compressible fluid in ducts of variable cross section. Solutions, in the form of perturbation series, are obtained for unsteady flows in ducts for which the logarithmic derivative of area variation with respect to the space coordinate is a function of the 'smallness' parameter of the perturbation series. This technique is applied to the problem of the interaction of a disturbance and a shock wave in a diffuser flow. It is found that, for a special choice of the function describing the disturbance, the path of the shock wave can be expressed in closed form to first order. The method is then applied to the determination of the flow field behind a shock wave moving on a prescribed path in the x,t-plane. Perturbation series solutions for quite general paths are developed. The perturbation series solutions are compared with the more exact solutions obtained by the application of the method of characteristics. The approximate solutions are shown to be in reasonably accurate agreement with the solutions obtained by the method of characteristics.

Note presenting an analysis of available airplane measurements of vertical gust velocity in order to arrive at a simple description of the frequency and intensity of gust velocities experienced by airplanes in operations. For the purpose of application to missile operations, the results obtained are modified to eliminate the effects of storm-avoidance procedures normally followed in airplane operations.

Report presenting an extension of a method for calculating motions in angles of attack and sideslip resulting from a trim angle of attack and steady rolling velocity to the condition of pitching- and yawing-moment inputs. The resulting formulas are intended primarily for rolling-velocity conditions in which rolling divergence is not encountered.

Note presenting the use of an integral technique to reduce the laminar boundary-layer equations on the windward generator of the plane of symmetry to a set of simultaneous algebraic equations. The method enables the skin friction coefficients and Stanton number to be calculated in a much shorter time than was needed to obtain exact numerical solutions from the boundary-layer equations.

Report presenting an analysis for obtaining approximate solutions of the similarity equations for three-dimensional laminar-boundary-layer flows over a flat surface under main-flow streamlines that are translates and representable as infinite series expansions.

The hemolysin system in gamma-irradiated rabbits was used in a study of the qualitative as well as the quantitative characteristics of the radiosensitivity of antibody production. Applications of IBM equipment in the analysis of biological data are discussed. Cytological features are described which were obscrved in buckwheat grown in carton dioxide containing carbon14. Electron microscopic observations are described which were made on the ovotestis of a pulmonate snail and on ciliate nuclear phenomena in Tetrahymena. Results are reported from a study of the comparative carcinogenicity of radium-226, strontium-90, and calcium-45 in mice. Results of tracer studies on metabolism in cultures of Escherichia coli indicate that in growing cultures of bacterias intracellular protein degradation and nucleic acid degradation do not occur and that under normal conditions cell death rarely occurs. Data on the heterologous growth of mouse ascites tumor in the rat are summarized. Observations on radiation injuries in chick embryos following exposure to cobalt-60 gamma radiation suggest two distinct modes of radiation injury. Findings are discussed. Progress is reported in the following studies: investigations of the heat-stable factor necessary for inhibition of catalase; the enzymatic decomposition of S- adenosylmethionine and methylthioadenosine; protein synthesis in the pancreas; the response of various …

Report presenting lift, drag, and pitching-moment coefficients for two wing-body combinations as determined from tests at Mach number 5.0 and angles of attack up to 9 degrees. The test models consisted of small thin wings mounted on a body composed of a fineness-ratio-3 ogival nose and a fineness-ratio-2 cylindrical afterbody.

Report presenting a description of an immersion-type pyrometer that utilizes the controlled cooling of a continuously aspirated sample of the gas whose temperature is to be measured. Results regarding both the preliminary and final testing with this device are provided.

ABS>A study was performed to determine the corrosion product and water impurity activities in the CETR Chemical Process System. These activities were calculated as functions of the reactor operating time, primary loop blowdown purification rate, and decay time following removal from the primary loop. For the design blowdown purification rate chosen, isotopes that are important to the design of radiation shielding include Co/sup 60/ and Co/sup 58/ Fe/sup 55/, Cr/ sup 51/, and Mn/sup 56/. A simplified mathematical model is used to represent the physical situation; however, the magnitude of the activities, taken at the end of core life to represent the most conservative case, is considered sufficiently accurate for engineering calculations. (auth)

"A study of cumulative fatigue damage at elevated temperatures was conducted using heat-treated SAE 4130 alloy steel. The S-N curves at room temperature, 400 degrees Fahrenheit, and 800 degrees Fahrenheit were obtained from rotating-beam fatigue tests. Two-step, three-step, and five-step cumulative-damage fatigue tests were conducted on rotating-beam fatigue specimens at room temperature, 400 degrees Fahrenheit, and 800 degrees Fahrenheit. The results of the cumulative-damage tests are compared with those of a theoretical analysis" (p. 1).

Results of tests to remove fission gases, xenon and krypton, formed during the operation of a nuclear reactor.

Experimental conversions of UO/sub 3/ to UO /sub 2/ to UF/sub 4/ in batch fluidized bed pilot-scale contactor have demonstrated that conversion rates approaching those predicted from basic kinetic data are attainable. Further studies with fluidized beds in columns incorporating a very slight taper show that solids mixing with attendant product contamination is reduced by a factor of ten as a direct result of the taper. Experiments with tapered fluidlized beds made the design of continuous (as opposed to the step enrichment of a multistage contactor) countercurrent contactors practical. Design procedures, in generalized form, are presented. The procedures take into consideration heat transfer, mixing losses, reaction kinetics, and chemical equilibria. (auth)

Note presenting results of a flight investigation to determine the aerodynamic characteristics of a supersonic propeller modified by the incorporation of higher than optimum advance angles. The propeller was designed for a forward Mach number of 0.95, an advance ratio of 3.2, and a power coefficient of 0.42. The efficiency of the propeller is approximately 79 percent at a Mach number of 0.95.

Turbulence was generated by using screens, and the turbulence percentage was measured by a hot-wire anemometer both in the boundary layer and the free stream. The local heat-transfer coefficient was measured at 12 locations along the plate for the cases of various turbulence levels. The transition Reynolds number from laminar to turbulent flow decreases as the main-stream turbulence level increases. In the range of laminar heat transfer the effect of turbulence in the main flow was not great, but in the range of turbulent heat transfer the heat-transfer coefficient increases according to the increase of turbulence.

Note presenting an investigation of spherical or platelike precipitates prepared in aluminum alloys with 1 to 4 weight percent copper. The effects of controlled sizes and distributions of particles were determined by creep, tensile, and hardness measurements by quantitative metallographic evaluation of the particle characteristics, and by X-ray and electron-microscope examinations.

Report presenting blowoff velocities and recirculation-zone lengths of propane-air flames stabilized by cylindrical flameholders measured as a function of pressure, cylinder diameter, fuel-air ratio, and tunnel geometry for a range of Reynolds numbers. Results regarding blowoff velocities, recirculation-zone lengths, critical time, and heat losses from recirculation zone are provided.

Note presenting an experimental investigation to determine the aerodynamic heat transfer and pressure distribution on flat-plate models with various arrangements of external stiffeners mounted normal to the direction of air flow. At all three Mach numbers tested, the addition of stiffeners to a flat plate caused large pressure variations and large pressure losses in the flow along the plate. Results regarding pressure distributions, equilibrium temperatures, and heat transfer are provided.