Stories Told by Music

In this circular, created by the Agriculture Extension Service at South Dakota State College, the information provided includes several songs in which tell a story. This information is provided through the guidance of the Home Economics Department during the year 1938

Spatial dependence of gain nonlinearities in InGaAs semiconductor optical amplifier

Counter-propagating sub-picosecond pulses are used to monitor gain saturation along the waveguide of an InGaAs superlattice semiconductor optical amplifier at 1550 nm wavelength. The functional form of the spatial dependence of gain saturation is found to depend on pulse energy. These observations are interpreted by combining the optical nonlinearities associated with interband carrier dynamics and carrier heating together and their respective time constants. We show that the results are consistent with the predictions of a propagation model. Implications for all-optical switching, particularly in the limit of full saturation across the whole amplifier, are discussed. (c) 2005 American Institute of Physics.</p

Development of Home Economics Standards Through 4-H Judging Work

What is judging? Judging is an every-day activity. A person judges every time a choice is made whether it is for food, clothing, home furnishings or entertainment. In 4-H club work, judging is simply a matter of selecting one article or product over another because of certain qualities. In order that club girls may learn to choose wisely, they need practice in making comparisons and in recognizing excellent qualities. (See more in text.

Performance of a Brayton power system with a space type radiator

Test results of an experimental investigation to measure Brayton engine performance while operating at the sink temperatures of a typical low earth orbit are presented. The results indicate that the radiator area was slightly oversized. The steady state and transient responses of the power system to the sink temperatures in orbit were measured. During the orbital operation, the engine did not reach the steady state operation of either sun or shade conditions. The alternator power variation during orbit was + or - 4 percent from its mean value of 9.3 kilowatts

Games for Home, Club and Community

When you see someone using and teaching games well, it seems simple and easy to do. But success doesn\u27t just happen; the best recreation is well-planned. Groups need to help people realize the value of recreation in human living and to plan programs carefully

Evaluation of be-38 percent al alloy final report, 27 jun. 1964 - 28 feb. 1965

Mechanical properties, microstructural features, and general metallurgical quality of beryllium- aluminum allo

calcifying odontogenic cyst- a three - dimensional radiological evaluation by cone beam computed tomography

Calcifying odontogenic cysts is an odontogenic cyst that gives rise to painless swelling which expand and occasionally perforate bone. Most of them are between 2 to 4 cm in diameter. Approximately 75% occur in anterior canine-incisor region. The highest incidence of occurence is between 10 and 29 years. Radiographically they appear as well-circumscribed, unilocular cyst-like areas with scattered radioacities which range from mere flecks to large masses. The related tooth usually gets displaced. Radiopaque flecks occur in radiographic features of some lesions which undergo osteolysis during their development. The radiopaque flecks occur as a result of dystrophic calcifications in long standing chronic mature lesions. The location of such radiopaque flecks whether pericoronal or periapical is also crucial in narrowing the diagnosis. Radiopaque flecks in pericoronal region occurs in calcifying epithelial odontogenic tumour, ameloblastic fibro-odontoma, whereas in calcifying odontogenic cyst , such radiopaque flecks appears small, discrete, pebble-like with a smooth outline in periapical region. Such pebbles of radiopaque specks were incidentally seen in cone beam computed tomography in a 20-year-old male evaluated radiographically in orthogonal planes in coronal, axial, sagittal slices and three-dimensional reconstructed view and treated by surgical enucleation was described here

Development of magnetostrictive active members for control of space structures

The goal of this Phase 2 Small Business Innovative Research (SBIR) project was to determine the technical feasibility of developing magnetostrictive active members for use as truss elements in space structures. Active members control elastic vibrations of truss-based space structures and integrate the functions of truss structure element, actively controlled actuator, and sensor. The active members must control structural motion to the sub-micron level and, for many proposed space applications, work at cryogenic temperatures. Under this program both room temperature and cryogenic temperature magnetostrictive active members were designed, fabricated, and tested. The results of these performance tests indicated that room temperature magnetostrictive actuators feature higher strain, stiffness, and force capability with lower amplifier requirements than similarly sized piezoelectric or electrostrictive active members, at the cost of higher mass. Two different cryogenic temperature magnetostrictive materials were tested at liquid nitrogen temperatures, both with larger strain capability than the room temperature magnetostrictive materials. The cryogenic active member development included the design and fabrication of a cryostat that allows operation of the cryogenic active member in a space structure testbed