2,250 research outputs found
Transonic flow in a converging-diverging nozzle Final report
Transonic equations of motion for convergent-divergent nozzl
Engineering and programming manual: Two-dimensional kinetic reference computer program (TDK)
The Two Dimensional Kinetics (TDK) computer program is a primary tool in applying the JANNAF liquid rocket thrust chamber performance prediction methodology. The development of a methodology that includes all aspects of rocket engine performance from analytical calculation to test measurements, that is physically accurate and consistent, and that serves as an industry and government reference is presented. Recent interest in rocket engines that operate at high expansion ratio, such as most Orbit Transfer Vehicle (OTV) engine designs, has required an extension of the analytical methods used by the TDK computer program. Thus, the version of TDK that is described in this manual is in many respects different from the 1973 version of the program. This new material reflects the new capabilities of the TDK computer program, the most important of which are described
Embodying Man: A Phenomenological Study of Body Image and Its Relationship to Masculinity
Many factors correlate with positive and negative body image issues in American culture today. Both men and women have a potential to struggle with negative and positive views of their bodies. However, body dissatisfaction has become commonly mistaken as an issue only impacting women. The present study sought to understand male body image and how it connects to a man’s view of his masculinity. The phenomenological study took place at a small, faith-based, residential campus in the Midwest and examined the experiences of eight male students at this institution. All participants mentioned family members as integral factors in helping them construct personal views of body image and mentioned their body types as indicators of perceived masculinity
Identification of Tylosin Photoreaction Products and Comparison of ELISA and HPLC Methods for Their Detection in Water
Tylosin is a widely used macrolide antibiotic for therapeutics and growth promotion in swine, beef cattle, and poultry production. Through various routes such as manure application, emission, inappropriate disposal, etc., tylosin enters the environment. The fate of tylosin in the environment is not yet fully understood. In this study, two photoreaction products of tylosin in water were identified as isotylosin A alcohol (E,Z) and isotylosin A aldol (E,Z). Tylosin A, B, C, D, isotylosin A alcohol, and isotylosin A aldol were purified, and immunological cross-reactivities of these tylosin-related compounds were tested with a specificity of 26% for tylosin B, 19% for tylosin C, 106% for tylosin D, 121% for isotylosin A alcohol, and 46% for isotylosin A aldol, compared to 100% for tylosin A. Competitive direct enzyme-linked immunosorbent assay (ELISA) for tylosin detection in water was compared with a high-performance liquid chromatography (HPLC) method by analyzing the same water samples from a study of tylosin dissipation in water. ELISA kits detect the other tylosin-related compounds besides tylosin A, which can result in differences in tylosin determination in water
Periodicity of high-order functions in the CNS Final progress report, year ending 30 Jun. 1971
Analysis of cerebral slow potentials underlying human attentive processes in central nervous syste
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