Spanish fiction Chivalry in literature. Romances, Spanish.

Thesis (Ph. D.)--Brown University. , Includes bibliographical references.

Fields of Research::270000 Biological Sciences::270100 Biochemistry and Cell Biology

1) The Ultrastructural appearance of frozen-fractured mouse liver cell membranes, and consistent variations in the distribution of membrane-associated particles caused by various pretreatments as described by previous investigators, were confirmed in this study. 2) Freeze fracturing, was evaluated as a method for studying the ultrastructure of single celled microorganisms. Large prokaryotes with previously undescribed morphologies were investigated using freeze fracturing, thin sectioning, and n...

Fields of Research::290000 Engineering and Technology::291700 Communications Technologies::291710 Radio communications and broadcasting not elsewhere classified

Work began in March 1967 with the design and construction of the fixed interferometer (described in Chapter 2) for measuring the elevation angle of arrival of 20MHz signals from the satellite Beacon-B. Also during this first year most of the computing was completed for the theoretical calculations on ray paths presented in Chapter 5; these results along with some previously obtained experimental results form the basis of a paper accepted by Radio Science. Records were obtained from the interfero...

An analytical investigation was conducted to determine the basic heave response characteristics of a plenum-type tracked air-cushion vehicle as a function of vehicle operating parameters. In addition to determining basic characteristics, the effect of an active lip control system on the vehicle dynamic response was investigated. Nonlinear equations describing the dynamic and thermodynamics tate of the air-cushion system were derived, and the response of the system to sinusoidal perturbations of ...

Thin-film Cu2S-CdS solar cells, loaded at various fixed values of load resistance, were thermally cycled for 1429 cycles in a simulated space environment. Cell performance was measured under controlled conditions in air before and after thermal cycling. These data were used to determine the effect of load voltage on cell performance. The performance of the cells was relatively independent of load voltage up to about 0.39 volt. This appears to be a threshold voltage, beyond which there was a sign...

An improved method of boundary collocation was developed and applied to the two-dimensional stress analysis of cracks emanating from, or in the vicinity of, holes or boundaries of various shapes. The solutions, presented in terms of the stress-intensity factor, were based on the complex variable method of Muskhelishvili and a modified boundary-collocation method. The complex-series stress functions developed for simply and multiply connected regions containing cracks were constructed so that the...

The present study is an attempt to make an assessment of the influence of wind shear on the longitudinal motion of airplanes. It was assumed that the wind is completely horizontal and its speed varies linearly with altitude. It is shown quantitatively that both glide and climb performance are influenced by wind shear and that trimmed flight at constant airspeed, attitude, and with fixed controls is along a parabolic path relative to the ground. The problem of the landing approach in a wind shear...

A turbulence response investigation was conducted with the XB-70 airplane. No special turbulence penetration techniques, speeds, or other restrictions were specified for the investigation, nor were any flights made solely to obtain turbulence data. During 79 flights, turbulence was encountered, and recorded on a VGH recorder, 6.2 percent of the total flight distance at supersonic speeds above an altitude of 12,192 meters (40,000 feet). Geographical locations are given for selected turbulence enc...