Variable sweep aircraft Patent

Development and characteristics of variable sweep wing control system for supersonic aircraf

Wreckers and Wrecking on the Florida Reef, 1829-1832

Dr. Benjamin B. Strobel, Charleston physician, left his South Carolina home in September, 1829, to seek professional opportunity in Key West, Florida. What motivated his departure is never totally disclosed in his writings, nor does he indicate his reasons for choosing the comparative primitiveness of the Florida Keys. He reveals only that he “was some time in doubt as to what course I should steer, when, having heard that there was something in my profession at Key West, I determined at once to go there.” Nevertheless, upon arriving at the island town of some five hundred inhabitants just staggering through a severe epidemic of yellow fever, he found immediate demand for his many capacities and proceeded to serve for the ensuing three years as the town’s chief physician, the surgeon to the recently established army post, editor of the Key West Gazette, amateur naturalist, and civic and religious leader

A French Document Relating to the Destruction of the French Colony in Florida at the Hands of the Spanish, 1565

One of the bloodiest and most publicized chapters in the early history of Florida was written by Don Pedro Menendez de Aviles, intrepid and unscrupulous agent of Philip II of Spain. On three occasions in the months of September and October, 1565, this Spanish gentleman, fired with true inquisitional fervor, ordered and supervised the systematic slaughter of remnants of the third French expedition to the Florida coast, thus ending the French attempt to colonize this disputed territory. Neither the events leading up to the massacres nor the details of the savage butchery requires retelling here. They are the subjects of numerous narratives, both secondary and primary. A brief word on the European reaction to these events is essential, however

Bemrose\u27s Medical Case Notes from the Second Seminole War

John Bemrose, a young pharmacist’s apprentice from Lincolnshire, England, began his long sea journey to the United States in August 1831. He disembarked in New York harbor in late September, and shortly afterwards, on November 1, he appeared at an army recruiting post in Philadelphia and accepted a five-year enlistment in the United States army. He was eighteen years old at the time. His slight acquaintance with the field of medicine was sufficient to obtain for him an assignment as hospital steward and surgeon’s aide and an early transfer to garrison duty in St. Augustine. As hostilities between the United States and the Seminole Indians intensified, Bemrose found himself late in 1835 in the field of military operations in central Florida. He was one of the very few medical assistants present at the Battle of Withlacoochee, the opening engagement of the war, on December 31, 1835

Sanibel Island and its Vicinity, 1833, A Document

The Gulf Coast lying south of Charlotte Harbor was slow to yield to the advances of the white man’s culture. Its contours are irregular, broken by hundreds of indentations and held together by congeries of islands and keys almost too numerous to be charted and labeled. Only in recent years have surveyors and cartographers been able to map the area with reliable accuracy and correct some of the errors resulting from the incomplete observations of the early explorers. A confusion of geographical designation continues to plague the modern historian. Rivers noted by earlier writers appear now to have been mere inlets, while certain keys have lost their Spanish nomenclature or have had their features altered by the hurricanes of the past century and a half. Historical records are not abundant

Electrical characterization of a Mapham inverter using pulse testing techniques

Electric power requirements for aerospace missions have reached megawatt power levels. Within the next few decades, it is anticipated that a manned lunar base, interplanetary travel, and surface exploration of the Martian surface will become reality. Several research and development projects aimed at demonstrating megawatt power level converters for space applications are currently underway at the NASA Lewis Research Center. Innovative testing techniques will be required to evaluate the components and converters, when developed, at their rated power in the absence of costly power sources, loads, and cooling systems. Facilities capable of testing these components and systems at full power are available, but their use may be cost prohibitive. The use of a multiple pulse testing technique is proposed to determine the electrical characteristics of large megawatt level power systems. Characterization of a Mapham inverter is made using the proposed technique and conclusions are drawn concerning its suitability as an experimental tool to evaluate megawatt level power systems

Development of a novel multi-capillary, multi-temperature commercial refrigerator cabinet with common low-pressure receiver

A multi-temperature 4 drawer catering cabinet was designed to operate using a low-pressure receiver with capillary expansion to the separate evaporator in each drawer. Low-pressure receivers have been shown to be an effective way of allowing evaporators to operate in a fully flooded mode thus enabling more efficient use of the evaporator surface for heat transfer. If a low-pressure receiver is used in a refrigeration circuit the control of refrigerant flow into the evaporator is less critical as the expansion device is not responsible for preventing liquid returning to the compressor. Therefore, a capillary expansion device can be used effectively over a range of operating pressures. The system was shown to be effective at maintaining temperatures in the storage drawers during chilled, frozen and mixed storage temperature tests carried out to the EN441 test standard. The cabinet operated successfully at all conditions except when the heat load in each drawer was excessive (>400 W above base level heat load). In this case, refrigerant was found to back up in the condenser and the low-pressure receiver was empty of liquid refrigerant. A solution to this would be to allow controlled flow of refrigerant from the condenser to the low-pressure receiver at high condensing pressures

Strings in gravity with torsion

A theory of gravitation in 4D is presented with strings used in the material action in $U_4$ spacetime. It is shown that the string naturally gives rise to torsion. It is also shown that the equation of motion a string follows from the Bianchi identity, gives the identical result as the Noether conservation laws, and follows a geodesic only in the lowest order approximation. In addition, the conservation laws show that strings naturally have spin, which arises not from their motion but from their one dimensional structure.Comment: 16 page

An evaluation of helicopter noise and vibration ride qualities criteria

Two methods of quantifying helicopter ride quality; absorbed power for vibration only and the NASA ride comfort model for both noise and vibration are discussed. Noise and vibration measurements were obtained on five operational US Army helicopters. The data were converted to both absorbed power and DISC's (discomfort units used in the NASA model) for specific helicopter flight conditions. Both models indicate considerable variation in ride quality between the five helicopters and between flight conditions within each helicopter