6,969 research outputs found
How Cosmic Background Correlations at Large Angles Relate to Mass Autocorrelations in Space
The Sachs-Wolfe effect is known to produce large angular scale fluctuations
in the Cosmic Microwave Background Radiation (CMBR) due to gravitational
potential fluctuations. We show how the angular correlation function of the
CMBR can be expressed explicitly in terms of the mass autocorrelation function
in the Universe. We derive analytic expressions for the angular
correlation function and its multipole moments in terms of integrals over or its second moment, , which does not need to satisfy the sort
of integral constraint that must. We derive similar expressions for
bulk flow velocity in terms of and . One interesting result that
emerges directly from this analysis is that, for angles , there is a
substantial contribution to the correlation function from a wide range of
distance and that the radial shape of this contribution does not vary
greatly with angle.Comment: 9 pages in Plain TeX and 6 figures appended in 9 pages of uuencoded
PostScript. Lick Preprint Number 1
Space environment operation of experimental hydrazine reactors Final report
Correlation of low temperature high vacuum hydrazine ignition properties of Shell 405 catalyst with concentration of adsorbed gase
Integrating research with NHS clinical practice: Unwelcome intrusion or constructive triangulation?
When embarking on research into the effectiveness of psychoanalytic psychotherapy in the NHS or the application of psychoanalytic principles, researchers come up against a number of hurdles: many clinicians still see empirical research as antithetical or disruptive to the practice of psychoanalytic psychotherapy; psychoanalytic psychotherapy has previously fared poorly in evidence-based policy guidelines and this can discourage ambition, and there are technical problems of research design, measurement and standardization. Nevertheless, in a political climate which stresses service evaluation, measurable outcomes and empirical evidence, psychoanalytic psychotherapy must participate to survive. There may be gains from conducting research beyond simply meeting the requirement to provide evidence of effectiveness. Research may be viewed by some clinicians as an unwelcome intruder but it may have the potential to offer triangulation, the perspective of the 'third', and so strengthen the foundations of clinical practice and the development of psychoanalytic thought
Non-contact pulse measurement for use in smart room applications.
The past decade has brought about major advances in the realms of both healthcare and biometrics. New technologies and techniques in the field of biometrics has allowed for the quick and efficient identification of people, while new healthcare technologies are allowing for less invasive monitoring of a person’s physiological state indicators. The combination of these two fields has allowed for a whole new frontier of science to be explored in the form of smart rooms. Smart rooms use the fusion of biometrics and healthcare monitoring to provide a solution to the problem of how best to monitor a patient to ensure their best possible health, safety, and comfort. This work attempts to push the boundaries of the field by creating a smart room technology that can provide nonintrusive monitoring of patient heart rate. This type of room could be used to revolutionize patient monitoring in terms of both comfort and safety. In this thesis, the culmination of several technological advances in the Computer Vision and Image Processing Lab were utilized to develop a methodology for the noncontact detection of a subject\u27s pulse. The algorithms and methodology employed in this thesis resulted in a system that was able to identify a subject\u27s pulse with 91.2% accuracy in a partially automated system. This demonstrates the proof of concept and shows a wide new range of possibilities for the world of medicine and patient monitoring
Facing The Abusing God: A Theology of Protest
What does it mean to speak of religious faith after the Holocaust? Must sole responsibility for the annihilation of six million Jews rest solely with humanity or was God also to blame? Come hear David Blumenthal discuss his new, and controversial, work and the faith that continues to challenge and sustain him.https://digitalcommons.fairfield.edu/bennettcenter-posters/1183/thumbnail.jp
Lensing and the Centers of Distant Early-Type Galaxies
Gravitational lensing provides a unique probe of the inner 10-1000 pc of
distant galaxies (z=0.2-1). Lens theory predicts that every strong lens system
should have a faint image near the center of the lens galaxy, which should be
visible in radio lenses but have not been observed. We study these ``core''
images using models derived from the stellar distributions in nearby early-type
galaxies. We find that realistic galaxies predict a remarkably wide range of
core images, with lensing magnifications spanning some six orders of magnitude.
More concentrated galaxies produce fainter core images, although not with any
simple, quantitative, model independent relation. Some real galaxies have
diffuse cores and predict bright core images (magnification mu>~0.1), but more
common are galaxies that predict faint core images (mu<~0.001). Thus, stellar
mass distributions alone are probably concentrated enough to explain the lack
of observed core images, and may require observational sensitivity to improve
by an order of magnitude before detections of core images become common.
Two-image lenses will tend to have brighter core images than four-image lenses,
so they will be the better targets for finding core images and exploiting these
tools for studying the central mass distributions of distant galaxies.Comment: 13 pages, emulateapj; submitted to Ap
Defective Gut Function in \u3cem\u3eDrop-Dead\u3c/em\u3e Mutant \u3cem\u3eDrosophila\u3c/em\u3e
Mutation of the gene drop-dead (drd ) causes adult Drosophila to die within 2 weeks of eclosion and is associated with reduced rates of defecation and increased volumes of crop contents. In the current study, we demonstrate that flies carrying the strong allele drdlwf display a reduction in the transfer of ingested food from the crop to the midgut, as measured both as a change in the steady-state distribution of food within the gut and also in the rates of crop emptying and midgut filling following a single meal. Mutant flies have abnormal triglyceride (TG) and glycogen stores over the first 4 days post-eclosion, consistent with their inability to move food into the midgut for digestion and nutrient absorption. However, the lifespan of mutants was dependent upon food presence and quality, suggesting that at least some individual flies were able to digest some food. Finally, spontaneous motility of the crop was abnormal in drdlwf flies, with the crops of mutant flies contracting significantly more rapidly than those of heterozygous controls. We therefore hypothesize that mutation of drd causes a structural or regulatory defect that inhibits the entry of food into the midgut
GGOT total pressure loss control concept evaluation
Total pressure loss is one of the most important parameters in the design of a turbine. This parameter effects not only the turbine performance, but consequently the engine power balance and engine performance. Computational Fluid Dynamics (CFD) can be an effective tool in predicting turbine total pressure loss, and also for performing sensitivity studies to achieve an optimal design with respect to pressure loss. In the present study, the AEROVISC code was used to predict the total pressure loss in the Turbine Technology Team Gas Generator Oxidizer Turbine (GGOT). The objectives in this study are two-fold. It is first necessary to determine an optimal methodology in predicting total pressure loss. The type of grid, grid density and distribution are parameters which may affect the loss prediction. Also, the effect of using a standard K-epsilon turbulence model with wall functions versus a two-layer turbulence model needs to be investigated. The use of grid embedding to resolve areas with high flow gradients needs to be explored. The second objective of the study is to apply the optimal methodology toward evaluating different tip leakage control concepts
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