A Model Of W Virginis With Rv Tauri Characteristics : Notes

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The dynamics of variable stars

Harmonics, pulsation amplitude, and vibratory motion of Cepheid variable star

A model of W Virginis with RV Tauri characteristics

Celestial model calculations for W Virginis star with RV Tauri characteristic

Burst Production by Mesotrons

Assuming that, under great absorbing thicknesses, cosmic-ray bursts are cascade showers from high energy soft secondaries produced in the shielding matter by mesotron-electron collisions and by mesotron bremsstrahlung, we have calculated the frequency of burst production as a function of burst size. For the mesotron of spin 1 and moment eℏ/2μc, we have used the previously calculated knock-on formulae, supplemented by our own calculations of the bremsstrahlung; for the latter, the cross section has terms, significant for our work, in E, ln2 E, and ln E. Up to energies close to 10^11 ev, only slight modifications are introduced by omitting altogether those processes which cannot be treated by the Born approximation, and the minimum cross sections we used differ little from those given directly by the Born approximation. Using these cross sections, the cascade theory of showers, and a modified form of the Furry model to take into account the fluctuations, the frequency of burst production was calculated. The sea-level data of Schein and Gill give for the number of bursts of size greater than S, NS∼S^-γ, with γ=1.8. Our calculations give for spin 1, γ∼1.5 and numerically too many by a factor of 20. Similar calculations for the mesotron of spin 0 give γ∼1.8 and the same in number as the observations within an uncertainty of about a factor 1.5. For spin ½ and moment eℏ/2μc, the bursts are approximately twice as numerous as for spin 0. This evidence thus favors spin 0, or possibly spin ½, but tends to exclude spin 1

Suggested approach for establishing a rehabilitation engineering information service for the state of California

An ever expanding body of rehabilitation engineering technology is developing in this country, but it rarely reaches the people for whom it is intended. The increasing concern of state and federal departments of rehabilitation for this technology lag was the stimulus for a series of problem-solving workshops held in California during 1977. As a result of the workshops, the recommendation emerged that the California Department of Rehabilitation take the lead in the development of a coordinated delivery system that would eventually serve the entire state and be a model for similar systems across the nation

The Coupling of Angular Momenta in Nuclear Reactions

Seven nuclear reactions have been examined where the angular distribution of reaction products depends on the type of coupling of angular momentum vectors in the nucleus. In six of the seven, the experimental angular distribution is consistent with the assumption of Russell-Saunders coupling in the nucleus. In three of the seven, the experiments are consistent with the assumption that the bombarding particle brings a definite j in the reaction. Neither assumption is sufficient to explain the result in one reaction (B11+P)

Low Excited States of F19. IV. Angular Distributions

The angular distributions [1] of inelastically scattered protons and the subsequent γ rays at resonances in Ne20 afford one means of establishing properties of low excited states of F19. For this purpose the 2- resonances in Ne20 made by p-wave protons on F19 in channel spin 1 are most suitable and are discussed below. Since it was not possible to measure the inelastically scattered protons leading to the 114-kev state at these resonances, we discuss only the angular distribution of protons leading to the 200-kev state and of the two γ rays