28,119 research outputs found

    The solar wind velocity and its correlation with geomagnetic, solar and cosmic ray activity

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    Correlation of plasma velocity with indices of solar and terrestrial activity - cosmic radiatio

    Boundary lubrication, thermal and oxidative stability of a fluorinated polyether and a perfluoropolyether triazine

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    Boundary lubricating characteristics, thermal stability, and oxidation-corrosion stability were determined for a fluorinated polyether and a perfluoropolyether triazine. A ball-on-disk apparatus, a tensimeter, and oxidation-corrosion apparatus were used. Results were compared to data for a polyphenyl ether and a C-ether. The polyether and triazine yielded better boundary lubricating characteristics than either the polyphenyl ether or C-ether. The polyphenyl ether had the greatest thermal stability (443 C) while the other fluids had stabilities in the range 389 to 397 C. Oxidation-corrosion results indicated the following order of stabilities: perfluoropolyether trizine greater than polyphenyl ether greater than C-ether greater than fluorinated polyether

    Understanding Hope: A Review of Measurement and Construct Validity Research

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    Hope has been discussed by philosophers, theologians, educators, and scientists, to name but a few groups of people, over the preceding two millennia. During the last 15 years, C. R. Snyder and his colleagues at the University of Kansas have developed a theory and associated measures of the hope construct that have received extensive, detailed attention both within and outside the field of psychology. In this chapter, we describe Snyder\u27s hope model and some of the research findings that have supported the validity of this construct. Beginning with a conceptual definition of hope, we move to relevant findings about the usefulness of hope in the lives of individuals in various life arenas. We describe measures developed for assessing hope in children and adults, as well as current issues associated with the validity of hope measurement. Finally, we discuss future directions for further investigation of hope

    Interplanetary mission design handbook. Volume 1, part 2: Earth to Mars ballistic mission opportunities, 1990-2005

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    Graphical data necessary for the preliminary design of ballistic missions to Mars are provided. Contours of launch energy requirements, as well as many other launch and Mars arrival parameters, are presented in launch date/arrival date space for all launch opportunities from 1990 through 2005. In addition, an extensive text is included which explains mission design methods, from launch window development to Mars probe and orbiter arrival design, utilizing the graphical data as well as numerous equations relating various parameters

    Shock tube measurements of growth constants in the branched-chain ethane-carbon monoxide-oxygen system

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    Exponential free radical growth constants have been measured for ethane carbon monoxide oxygen mixtures by monitoring the growth of oxygen atom concentration as manifested by CO flame band emission. Data were obtained over the temperature range of 1200 to 1700 K. The data were analyzed using an ethane oxidation mechanism involving seven elementary reaction steps. Calculated growth constants were close to experimental values at lower temperatures, up to about 1400 K, but at higher temperatures computed growth constants were considerably smaller than experiment. In attempts to explain these results additional branching reactions were added to the mechanism. However, these additional reactions did not appreciably change calculated growth constants

    Handbook of Social and Clinical Psychology: The Health Perspective

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    From 1988 to 1991 Donelson R. Forsyth worked with C.R. Snyder and many other experts in the field of social and clinical psychology, editing a handbook that--at that time--summarized ongoing efforts in what was known as the social-clinical interface. This interface recognized the growing interdependency of these two fields. Up to that time social psychologists were mostly preoccupied with the study of the interpersonal determinants of thought, feeling, and action. Their work was primarily theoretically driven, the behaviors they sought to explain were the sort that occurred in everyday settings, and they preferred to test their hypotheses through laboratory experimentation. Clinical psychologists, in contrast, sought to understand the causes of and cures for dysfunctional behavior. They were concerned with developing effective treatments and diagnostic techniques, the behaviors they puzzled over were abnormal ones, and they preferred to test their hypotheses in field settings. The Handbook that C.R. Snyder and Donelson R. Forsyth developed, however, explored the boundary line separating social and clinical psychology. It included chapters by social psychologists who, recognizing the potential applicability of their theories to clinical practice, had began exploring sources of dysfunction and suggesting socially based treatment strategies. It also included chapters by clinical psychologists not only recognized the role of interpersonal dynamics in adjustment and therapy, but who had begun to integrate social psychological principles and clinical practice. The Handbook of Social and Clinical Psychology (HSCP) served as a comprehensive resource book for theorists, researchers, and scholars working at the interface of social and clinical psychology.https://scholarship.richmond.edu/bookshelf/1167/thumbnail.jp
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