Interaction of crippling and torsional-flexural instabilities for centrally loaded columns

Empirical technique predicts failure loads for centrally loaded columns with thin-walled, open cross sections. Interaction of two failure modes is predicted by modification of the Johnson-Euler equation

Slosh test analysis for the 200-inch multicell tank

Slosh test analysis of multicell fuel tank

Spontaneous photon emission stimulated by two Bose condensates

We show that the phase difference of two overlapping ground state Bose-Einstein condensates can effect the optical spontaneous emission rate of excited atoms. Depending on the phase difference the atom stimulated spontaneous emission rate can vary between zero and the rate corresponding to all the ground state atoms in a single condensate. Besides giving control over spontaneous emission this provides an optical method for detecting the condensate phase difference. It differs from previous methods in that no light fields are applied. Instead the light is spontaneously emitted when excited atoms make a transition into either condensate.Comment: 14 pages, 2 postscript figures, Revtex. Corrections and significant additions in revisio

A simple dead-reckoning navigational system

Simple navigation system is designed for vehicles operating in remote locations where it is not feasible to transport extensive equipment. System consists of four main components: directional gyrocompass to establish inertial direction; odometer to measure distance; signal processor to combine measured distance and direction; and sun compass to determine initial direction

Two-photon detuning and decoherence in cavity electromagnetically induced transparency for quantized fields

The interaction of a quantized field with three-level atoms in $\Lambda$ configuration inside a two-mode cavity is analyzed in the small noise approximation. The atoms are in a two-photon detuning with respect to the carriers of the field. We calculate the stationary quadrature noise spectrum of the field outside the cavity in the case where the input probe field is a squeezed state and the input pump field is a coherent state. The mean value of the field is unaltered in all the analysis: the atoms shows electromagnetically induced transparency (EIT). The effect of the atoms' base level decoherence in the cavity output field is also studied. It is found that the output field is very sensitive to two-photon detuning.Comment: 8 page

Alien Registration- Walls, Elizabeth C. (Brownville, Piscataquis County)

https://digitalmaine.com/alien_docs/10819/thumbnail.jp

The Teaching of Reading in a One-Teacher Rural School

The reading material in the primary section must by well taught in order that when a child leaves this section, he will have a broader and wider comprehension of the subjects to be learned in the intermediate and upper elementary grades. We know that in teaching any subject the primary object in view is to select material according to the child\u27s ability, and interest; and the outcome expected from what is to be learned. The writer shall attempt to show that reading well presented in the primary section aids in developing the child.for social and civic responsibilities which are the most important aims in the educational program. The major purpose of reading should be for enjoyment. The amount of reading done in school, the selections that are chosen, and the methods used in teaching, are important factors which may influence the child\u27s reading habits for life

High Temperature Compression Testing of an Advanced Carbon-Carbon Composite in an Oxidizing Atmosphere

Compression testing of an advanced, three-dimensional weave, carbon-carbon composite was performed from room temperature to 2192°F (1200°C) in an oxidizing environment. The material tested is primarily used for missile nose cones and rocket nozzles. A test system and test method was developed for performing high temperature compression testing and techniques were developed for machining the material to minimize fiber damage and maintain accurate tolerances. Test specimens were cut from a block of the test material in the three principal fiber orientations, and off-axis tests were cut at 45 orientations to each principal fiber direction. The specimens were tested by direct end loading using custom made, ceramic test fixtures, permitting the determination of the compressive modulus and ultimate compressive strength for each principal fiber direction and an approximation of the ultimate shear strength based on the off-axis tests. To document the materials oxidation rate an oxidation study was also performed at temperatures in excess of 11 12°F (600°C). The results demonstrate that the structural integrity of the material was maintained from room temperature to 1472°F (800°C), while moderate oxidation was observed from room temperature to 1472°F (800°C) and severe oxidation occurred above 1472°F (800°C). Based on the data from the oxidation~results, the compression test data generated for the 1472°F (800°C) tests was corrected to account for material loss during each test due to oxidation. The compression test results also demonstrated material symmetry along two of the principal fiber orientations

Transfer of Nonclassical Properties from A Microscopic Superposition to Macroscopic Thermal States in The High Temperature Limit

We present several examples where prominent quantum properties are transferred from a microscopic superposition to thermal states at high temperatures. Our work is motivated by an analogy of Schrodinger's cat paradox, where the state corresponding to the virtual cat is a mixed thermal state with a large average photon number. Remarkably, quantum entanglement can be produced between thermal states with nearly the maximum Bell-inequality violation even when the temperatures of both modes approach infinity.Comment: minor corrections, acknowledgments added, Phys.Rev.Lett., in pres