Apparatus for producing high purity silicon carbide crystals Patent

Device for producing high purity silicon carbide on carbon base by hydrogen reduction of silicon tetrachlorid

Method of coating carbonaceous base to prevent oxidation destruction and coated base Patent

Vapor deposited laminated nitride-silicon coating for corrosion prevention of carbonaceous surface

Solventless LARC-160 Polyimide Matrix Resin

The addition polyimide, LARC-160, which was originally synthesized from low cost liquid monomers as a laminating resin in ethanol, was prepared as a solventless, high viscosity, neat liquid resin. The resin was processed by hot-melt coating techniques into graphite prepreg with excellent tack and drape. Comparable data on graphite reinforced laminates made from solvent-coated and various hot-melt coated prepreg were generated. LARC-160, because of its liquid nature, can be easily autoclave processed to produce low void laminates. Liquid chromatographic fingerprints indicate good reaction control on resin scale ups. Minor changes in monomer ratios were also made to improve the thermal aging performance of graphite laminates

Enhancing Success Through Leadership

This study sought to obtain a better understanding of how leaders influence the culture of the organization to enhance performance. A post-positive qualitative research case study was conducted at a state agency in the Commonwealth of Virginia. During this study, 13 semi-structured interviews were conducted with agency employees who participated on a project to implement a smart phone fuel application. This fuel application automated specific manual processes related to their fuel management program. While the fuel application project implementation was finishing, the interviews were conducted. During these interviews, participants provided their perspectives on leadership, communication, empowerment, project outcomes, lessons learned, and suggestions for future agency success. The interview responses of the participants were transcribed and coded. From these codes, five themes emerged during data analysis. These themes include leadership expectations, effective communication, lessons learned, project perspectives, and future agency success. The interpretation of these themes provide feedback to the senior executives of the agency regarding current initiatives and the change readiness of employees. Participants provided their perspectives on how the agency can be more successful in the future. While specifics are relative to the agency, the generalization of these themes have applicability to other organizations. Senior leaders can leverage these themes to initiate internal organizational dialogue. This dialogue can foster a more holistic understanding of the organization as well as identifying areas for improvement. Once identified, further collaboration through a cross-functional group of employees can also develop and implement creative solutions to enhance organizational performance toward the shared goals and objectives

Formation of Low Threshold Voltage Microlasers

Vertical cavity surface emitting lasers (VCSELs) with threshold voltages of 1.7V have been fabricated. The resistance-area product in these new vertical cavity lasers is comparable to that of edge-emitting lasers, and threshold currents as low as 3 mA have been measured. Molecular beam epitaxy was used to grow n-type mirrors, a quantum well active region, and a heavily Be-doped p-contact. After contact definition and alloying, passive high-reflectivity mirrors were deposited by reactive sputter deposition of SiO2/Si3N4 to complete the laser cavity

A Biosystematic Study of Silphium Integrifolium Michaux (Compositae)

Author Institution: Biology Department, State University of New York, College at Oneonta, Oneonta, New York 13820, and Biology Department, Bowling Green State University, Bowling Green, Ohio 43403Cytological and chromatographic data indicate that Silphium integrifolium Michx. is a rather homogeneous group of plants. Cytological study shows good pairing during meiosis in interspecific and intraspecific hybrids. Two-dimensional paper chromatography indicates that the varieties of S. integrifolium are more similar to each other than they are to two related species, S. asperrimum and S. speciosum. The varieties of S. integrifolium are chromatographically homogeneous

Technical approaches for measurement of human errors

Human error is a significant contributing factor in a very high proportion of civil transport, general aviation, and rotorcraft accidents. The technical details of a variety of proven approaches for the measurement of human errors in the context of the national airspace system are presented. Unobtrusive measurements suitable for cockpit operations and procedures in part of full mission simulation are emphasized. Procedure, system performance, and human operator centered measurements are discussed as they apply to the manual control, communication, supervisory, and monitoring tasks which are relevant to aviation operations

The analysis of delays in simulator digital computing systems. Volume 1: Formulation of an analysis approach using a central example simulator model

The effects of spurious delays in real time digital computing systems are examined. Various sources of spurious delays are defined and analyzed using an extant simulator system as an example. A specific analysis procedure is set forth and four cases are viewed in terms of their time and frequency domain characteristics. Numerical solutions are obtained for three single rate one- and two-computer examples, and the analysis problem is formulated for a two-rate, two-computer example

Production of high purity silicon carbide Patent

Producing high purity silicon carbide on carbon base by hydrogen reduction of silicon tetrachlorid