NASA Lewis Research Center low-gravity fluid management technology program

A history of the Lewis Research Center in space fluid management technology program is presented. Current programs which include numerical modeling of fluid systems, heat exchanger/radiator concept studies, and the design of the Cryogenic Fluid Management Facility are discussed. Recent analytical and experimental activities performed to support the Shuttle/Centaur development activity are highlighted

Simulating hypervelocity impact effects on structures using the smoothed particle hydrodynamics code MAGI

Analysis of interaction occurring between space debris and orbiting structures is of great interest to the planning and survivability of space assets. Computer simulation of the impact events using hydrodynamic codes can provide some understanding of the processes but the problems involved with this fundamental approach are formidable. First, any realistic simulation is necessarily three-dimensional, e.g., the impact and breakup of a satellite. Second, the thickness of important components such as satellite skins or bumper shields are small with respect to the dimension of the structure as a whole, presenting severe zoning problems for codes. Thirdly, the debris cloud produced by the primary impact will yield many secondary impacts which will contribute to the damage and possible breakup of the structure. The problem was approached by choosing a relatively new computational technique that has virtues peculiar to space impacts. The method is called Smoothed Particle Hydrodynamics

The development and evaluation of the paediatric index of emotional distress (PI-ED)

Purpose: Current measures of anxiety and depression for children and young people (CYP) include somatic symptoms and can be lengthy. They can inflate scores in cases where there is also physical illness, contain potentially distressing symptoms for some settings and be impractical in clinical practice. The present study aimed to develop and evaluate a new questionnaire, the paediatric index of emotional distress (PI-ED), to screen for emotional distress in CYP, modelled on the hospital anxiety and depression scale. Methods: A school-based sample (n = 1026) was employed to examine the PI-ED’s psychometric properties and a clinical sample of CYP (n = 143) was used to establish its sensitivity and specificity. Results: Exploratory and confirmatory factor analyses identified a bi-factor model with a general emotional distress factor (‘cothymia’) and anxiety and depression as co-factors. The PI-ED demonstrated good psychometric properties and clinical utility with a cutoff score of 20. Conclusion: The PI-ED is a brief, valid and reliable clinical screening tool for emotional distress in CYP

An Undersea Radioisotope Power Supply

The results and current status of an Aerojet sponsored program to develop a product line of low power radioisotope thermoelectric generators for marine applications are discussed. A 1-watt ( e) Undersea Radioisotope Power Supply (URIPS) has been designed, fabricated, and tested Extensive parametric studies were performed to select optimum design characteristics; typical parameters investigated were radioisotope and chemical fuel form, thermoelectric material, fuel capsule L/D ratio, shield material and geometry, and operating conditions . The design emphasizes high reliability and low cost, but considerable emphasis was placed on adaptability to meet a wide spectrum of user requirements . URIPS is designed to provide a steady power output for a minimum of five years at ocean depths up to 20 , 000 feet

Evaluation of an Online LGBTQ Patient Care Education Module for Primary Care Providers

PURPOSE: The purpose of this pilot study was to evaluate the effectiveness of an online educational module about LGBTQ healthcare topics for primary care providers in Kentucky. The study focused on the changes in knowledge, attitudes and self-efficacy in topics related to LGBTQ patients. METHODS: This study was a one-group pre/post intervention design to evaluate the knowledge, attitudes and self- efficacy of providers regarding primary care topics for the LGBTQ community before and after completing a training module on LGBTQ healthcare topics. Subjects were recruited via the KCNPNM Listserv over a 2-week period to participate in the interactive, online audio/visual module. The module is an original presentation using evidenced based guidelines tailored to adapt to common primary care scenarios involving LGBTQ patients. RESULTS: There were statistically significant changes in participant (N=47) attitudes regarding LGBTQ patient discrimination in healthcare settings, and confidence in taking a comprehensive sexual history. There was also an increase in mean knowledge scores from pre (0.58) to post (0.71). There were improvements in other categories of attitudes and self-efficacy, but the results were not statistically significant. DISCUSSION: This effective training provides the opportunity for advancement in the cultural competency of primary care providers in Kentucky, which is desperately needed to improve the health outcomes of the selected vulnerable population. Future projects can focus on LGBTQ patient health outcomes and satisfaction of care following cultural competency implementation

First Canadian Record of \u3ci\u3eHexacola Neoscatellae\u3c/i\u3e (Hymenoptera: Figitidae: Eucoilinae), A Parasitoid of the Shore Fly, \u3ci\u3eScatella Stagnalis\u3c/i\u3e

This paper documents the first occurrence of Hexacola neoscatellae, a shore fly parasitoid, in Canada. The discovery of H. neoscatellae is significant because currently there are no suitable biological control agents available for shore fly control to the floriculture industry

Application of advanced electronics to a future spacecraft computer design

Advancements in hardware and software technology are summarized with specific emphasis on spacecraft computer capabilities. Available state of the art technology is reviewed and candidate architectures are defined

Space Trajectory Error Analysis Program (STEAP) for halo orbit missions. Volume 2: Programmer's manual

The six month effort was responsible for the development, test, conversion, and documentation of computer software for the mission analysis of missions to halo orbits about libration points in the earth-sun system. The software consisting of two programs called NOMNAL and ERRAN is part of the Space Trajectories Error Analysis Programs. The program NOMNAL targets a transfer trajectory from earth on a given launch date to a specified halo orbit on a required arrival date. Either impulsive or finite thrust insertion maneuvers into halo orbit are permitted by the program. The transfer trajectory is consistent with a realistic launch profile input by the user. The second program ERRAN conducts error analyses of the targeted transfer trajectory. Measurements including range, doppler, star-planet angles, and apparent planet diameter are processed in a Kalman-Schmidt filter to determine the trajectory knowledge uncertainty