Breadboard RL10-2B low-thrust operating mode (second iteration) test report

Cryogenic rocket engines requiring a cooling process to thermally condition the engine to operating temperature can be made more efficient if cooling propellants can be burned. Tank head idle and pumped idle modes can be used to burn propellants employed for cooling, thereby providing useful thrust. Such idle modes required the use of a heat exchanger to vaporize oxygen prior to injection into the combustion chamber. During December 1988, Pratt and Whitney conducted a series of engine hot firing demonstrating the operation of two new, previously untested oxidizer heat exchanger designs. The program was a second iteration of previous low thrust testing conducted in 1984, during which a first-generation heat exchanger design was used. Although operation was demonstrated at tank head idle and pumped idle, the engine experienced instability when propellants could not be supplied to the heat exchanger at design conditions

Review of \u3cem\u3e In the Woods \u3c/em\u3e by David Elliot

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Review of \u3cem\u3e Hike \u3c/em\u3e by Pete Oswald

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Review of \u3cem\u3e The Blue House \u3c/em\u3e by Phoebe Wahl

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Review of \u3cem\u3e Fly High, John Glenn: The Story of an American Hero \u3c/em\u3e by Kathleen Krull

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Review of \u3cem\u3e By and By: Charles Albert Tindley, the Father of Gospel Music \u3c/em\u3e by Carole Boston Weatherford

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Review of \u3cem\u3e The Strange Birds of Flannery O\u27Connor: A Life \u3c/em\u3e by Amy Alznauer

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Review of \u3cem\u3e Me and Mama \u3c/em\u3e by Cozbi A. Cabrera

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Review of \u3cem\u3e Bones in the White House: Thomas Jefferson’s Mammoth \u3c/em\u3e by Candice Ransom

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Analysis of rolling group therapy data using conditionally autoregressive priors

Group therapy is a central treatment modality for behavioral health disorders such as alcohol and other drug use (AOD) and depression. Group therapy is often delivered under a rolling (or open) admissions policy, where new clients are continuously enrolled into a group as space permits. Rolling admissions policies result in a complex correlation structure among client outcomes. Despite the ubiquity of rolling admissions in practice, little guidance on the analysis of such data is available. We discuss the limitations of previously proposed approaches in the context of a study that delivered group cognitive behavioral therapy for depression to clients in residential substance abuse treatment. We improve upon previous rolling group analytic approaches by fully modeling the interrelatedness of client depressive symptom scores using a hierarchical Bayesian model that assumes a conditionally autoregressive prior for session-level random effects. We demonstrate improved performance using our method for estimating the variance of model parameters and the enhanced ability to learn about the complex correlation structure among participants in rolling therapy groups. Our approach broadly applies to any group therapy setting where groups have changing client composition. It will lead to more efficient analyses of client-level data and improve the group therapy research community's ability to understand how the dynamics of rolling groups lead to client outcomes.Comment: Published in at http://dx.doi.org/10.1214/10-AOAS434 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org