Comparison data for Seasat altimetry in the western North Atlantic

The radar altimeter flown on Seasat in 1978 collected approximately 1,000 orbits of high quality data (5-8 precision). In the western North Atlantic these data were combined with a detailed gravimetric geoid in an attempt to produce profiles of dynamic topography. In order to provide a basis for evaluation of these profiles, available oceanographic observations in the Gulf Stream/Sargasso Sea region have been compiled into a series of biweekly maps. The data include XBT's, satellite infrared imagery, and selected trajectories of surface drifters and sub-surface SOFAR floats. The maps document the known locations of the Gulf Stream, cyclonic and anticyclonic rings, and mid-ocean eddies during the period July to October 1978

Comparison of blade loads of fixed and free yawing wind turbine

The self regulating composite bearingless wind turbine utilizes an automatic pitch control concept and a completely unrestrained yawing degree of freedom. Aerodynamic moments caused by skewed flow provide the control to align the wind turbine with the wind. Model tests demonstrated the feasibility of the concept and analytical studies showed the free system to experience lower blade loads compared to the fixed system

Domination Numbers of Semi-strong Products of Graphs

This thesis examines the domination number of the semi-strong product of two graphs G and H where both G and H are simple and connected graphs. The product has an edge set that is the union of the edge set of the direct product of G and H together with the cardinality of V(H), copies of G. Unlike the other more common products (Cartesian, direct and strong), the semi-strong product is neither commutative nor associative. The semi-strong product is not supermultiplicative, so it does not satisfy a Vizing like conjecture. It is also not submultiplicative so it shares these two properties with the direct product. After giving the basic definitions related with graphs, domination in graphs and basic properties of the semi-strong product, this paper includes a general upper bound for the domination of the semi-strong product of any two graphs G and H as less than or equal to twice the domination numbers of each graph individually. Similar general results for the semi-strong product perfect-paired domination numbers of any two graphs G and H, as well as semi-strong products of some specific types of cycle graphs are also addressed

Investigation of a bearingless helicopter rotor concept having a composite primary structure

Experimental and analytical investigations were conducted to evaluate a bearingless helicopter rotor concept (CBR) made possible through the use of the specialized nonisotropic properties of composite materials. The investigation was focused on four principal areas which were expected to answer important questions regarding the feasibility of this concept. First, an examination of material properties was made to establish moduli, ultimate strength, and fatigue characteristics of unidirectional graphite/epoxy, the composite material selected for this application. The results confirmed the high bending modulus and strengths and low shear modulus expected of this material, and demonstrated fatigue properties in torsion which make this material ideally suited for the CBR application. Second, a dynamically scaled model was fabricated and tested in the low speed wind tunnel to explore the aeroelastic characteristics of the CBR and to explore various concepts relative to the method of blade pitch control. Two basic control configurations were tested, one in which pitch flap coupling could occur and another which eliminated all coupling. It was found that both systems could be operated successfully at simulated speeds of 180 knots; however, the configuration with coupling present revealed a potential for undesirable aeroelastic response. The uncoupled configuration behaved generally as a conventional hingeless rotor and was stable for all conditions tested

Attributions in the Adult Mother-Daughter Relationship

The study explored mother-daughter relationships within the attributional relationship paradigm. Literature on mother-daughter relationships has been contradictory in characterizing the relationship as either mutually satisfying and fulfilling or as a source of considerable turmoil. The study addressed: would the relationships between satisfaction and attributions found in other close relationships also be obtained in adult mother-daughter relationships; do mothers and daughters differ in level of satisfaction with the relationship or in the nature of the attributions made; is age related to satisfaction or attributions? Women were asked to describe positive and negative interactions under real and hypothetical conditions, with their mothers and daughters. 76 female students completed questionnaires about their mothers; 40 of the students’ mothers responded regarding their daughters, and 19 of the mothers responded regarding their mothers. The women indicated a cause for the four interactions and completed a modified version of the Causal Dimension Scale (CDS; Russell, 1982) asking for ratings of locus, stability, controllability, globality and responsibility attributions. They also rated how positive or negative they felt the interactions were and completed a Satisfaction Scale regarding their relationship. This study replicated several of the findings of the attributional research on close relationships: causes of positive interactions were seen as more internal to oneself, more stable, more controllable and more global than the causes of negative interactions. No effect was found for hypothetical versus real interactions on attributions. Satisfaction was related to perceiving the cause of positive interactions as internal, controllable, and stable. Satisfaction was related to seeing the cause of negative interactions as temporary, specific, and one’s own responsibility. Mothers and daughters were generally satisfied with their relationship, mothers more so than daughters. Although they did not differ on locus, stability, controllability, or globalily attributions, an interaction effect was found for roie x valence x condition for responsibility attributions. Mothers and daughters disagreed on the cause of interactions and who was responsible for the interactions being positive or negative. Age was not found to be related to satisfaction or attribution variables

Program listing for the REEDM (Rocket Exhaust Effluent Diffusion Model) computer program

The program listing for the REEDM Computer Program is provided. A mathematical description of the atmospheric dispersion models, cloud-rise models, and other formulas used in the REEDM model; vehicle and source parameters, other pertinent physical properties of the rocket exhaust cloud and meteorological layering techniques; user's instructions for the REEDM computer program; and worked example problems are contained in NASA CR-3646

User's manual for the REEDM (Rocket Exhaust Effluent Diffusion Model) computer program

The REEDM computer program predicts concentrations, dosages, and depositions downwind from normal and abnormal launches of rocket vehicles at NASA's Kennedy Space Center. The atmospheric dispersion models, cloud-rise models, and other formulas used in the REEDM model are described mathematically Vehicle and source parameters, other pertinent physical properties of the rocket exhaust cloud, and meteorological layering techniques are presented as well as user's instructions for REEDM. Worked example problems are included