Physics

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Quasi-classical theory of electron correlations in atoms.

A discussion of the quasi-classical limit of many particle perturbation theory for electrons moving in the coulomb potential of the nucleus. The problem is analyzed using Green's function formu- lation of many particle physics. When corrections invol...

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The Response Time of the Lower Ionosphere to a Pulse of Ionization.

A discussion of the recovery time of ionization in the low ionosphere (60- to 100-km altitude). It is known that both the local air chemistry and the level of ambient ionization affect the lifetime of free electrons in the ionosphere. The model for t...

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Operators Commuting with Translation by One-Part II: Differential Operators with Periodic Coefficients

An extension of the theory of differential equations and linear operators, both of which have many applications to engineering and mathematical physics.

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Industrial Equipment Spectrum Signatures

A survey of the radiation characteristics (spectrum signatures) of electrical and electronic equipments (such as rectifiers, welders, power lines, switching devices, ignition systems, induction heaters, and electric motors).

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Recalculations of Cloud Electrification Based on a General Charge-Separation Mechanism

A rederivation of the field growth equation along the same general lines given in P-2121, but considering the field E to vary with time in the computation of the volume charge density.

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Some Aspects of Quasilinearization

Part of RAND's continuing study of means for exploiting the capabilities of modern computing machines in solving problems of technology and physics.

Journal Article

A Summary of the Supersonic Pressure Drag of Bodies of Revolution

A number of approximate theories for supersonic and hypersonic flow over bodies of revolution at zero angle of attack are appraised.

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Invariant imbedding and mathematical physics--I: particle processes.

A derivation, using invariance principles in a systematic fashion, not only of new analytic formulations of the classical particle processes (namely, those of transport theory, radiative transfer, random walk, multiple scattering, and diffusion theor...

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Calculations of Cloud Electrification Based on a General Charge Separation Mechanism

A description of a mechanism for selectively transferring charge in clouds in a way that enhances the normal atmospheric electrostatic field.

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Some Fundamental Considerations Relating to Advanced Rocket Propulsion Systems

A discussion, in general terms, of the problems of maximizing specific impulse, acceleration, and burnout velocity for jet-propelled vehicles.

Journal Article

General Impact Theory of Pressure Broadening

A theory of pressure broadening is developed which treats the perturbers quantum mechanically.

Journal Article

Problem of Overlapping Lines in the Theory of Pressure Broadening

The theory of pressure broadening is re-examined, in order to include the possibility of overlapping lines.

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Recent results of high-altitude research by means of rockets and satellites.

An account of the more important recent advances in high-altitude research based on rocket and satellite data and a presentation of a quantitative picture of our current knowledge of atmospheric physics. Some findings which have not yet been properly...

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Effects of Surface Tension and Viscosity on Taylor Instability

A discussion of a model of two fluids of infinite depth (with the interface initially in the form of a sine wave with amplitude that is small compared with wave length) to determine the effects of surface tension and viscosity.

Journal Article

Boundary-layer Stability and Transition in Subsonic and Supersonic Flow: A Review of Available Information with New Data in the Supersonic Range

Prediction of the aerodynamic characteristics of a body at high flight speeds requires knowledge of the characteristics of the existing boundary layer

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Gamma-Ray Transmission Through Finite Slabs

A discussion of several methods of gamma-ray transmission which determine the total probability of transmission with any number of scatterings, check the results of the calculations, and augment results for the pure Compton scatterer.

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Thermodynamic Properties of Real Gases for Use in High Pressure Problems

A presentation and discussion of the equations, derived from an equation of state for real gases, which are suitable for the calculation of the thermodynamic properties varying with temperature and pressure for real gases.

Journal Article

A Second-Order Solution for an Oscillating Two-Dimensional Supersonic Airfoil

This paper presents a second-order solution for the forces and moments produced by an oscillating two-dimensional airfoil of arbitrary cross section.

People

Gavin S. Hartnett

People

Jason Mastbaum