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Multi-Mode Micropropulsion, Phase I
data.nasa.gov | Last Updated 2018-07-19T07:53:06.000ZThis project will further development of a thruster capable of both chemical monopropellant and electrospray propulsion using a single "green" ionic liquid propellant. the thruster concept consists of an integrated microtube/electrospray thruster that shares all propulsion system hardware between electric and chemical thruster modes, i.e. one propellant, one propellant tank, one feed system, and one thruster. Thus, the thruster is not significantly more massive than a standalone state-of-the-art chemical or electric thruster, but capable of either thrust mode and selectable as mission needs arise. This has several benefits, including the optimization of trajectories using both chemical and electric thrust manuevers as well as a significantly increased mission design space for a single propulsion unit. The propulsion system is capable of both high impulse per unit volume and high thrust per unit volume as the total impulse per unit volume is 1500 N-s/U in the chemical thrust mode and 2750 N-s/U in the electric thrust mode, where either type of manuever could be selected on-the-fly. The specific objectives for this study are to build a single microtube setup and feed system and test both the chemical monopropellant mode and electrospray mode with the same setup. This setup will allow verification of thruster models stemming from previous chemical mode tests, verify electrospray operation at lower flow rates than we have previously tested, and study the interactions in switching from the chemical mode to the electric mode and vice-versa with specific attention paid to potential life limiting mechanisms. As an additional part of this contract, we will work in parallel to investigate techniques required to manufacture multi-emitter arrays and conduct fluid flow and electrostatic simulations to further develop the preliminary thruster design.
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Bronx Subway Station Locations
bronx.lehman.cuny.edu | Last Updated 2016-08-27T18:51:41.000ZBronx Subway Station Locations
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NEW HORIZONS SDC JUPITER ENCOUNTER V1.0
data.nasa.gov | Last Updated 2018-07-19T04:48:48.000ZThis data set contains Raw data taken by the New Horizons Student Dust Counter instrument during the Jupiter encounter mission phase.
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Shock Hazard Prevention through Self-Healing Insulative Coating on SSA Metallic Bearings, Phase II
data.nasa.gov | Last Updated 2018-07-19T10:11:46.000ZThe space suit assembly (SSA) contains metallic bearings at the wrist, neck, and waist, which are exposed to space environment, and pose a potential shock hazard. Current methods to mitigate the hazard are short-term, and there is a need for an insulative and durable coating on the metallic components. In Phase I, working with a supplier of space suits to NASA, we demonstrated proof-of-concept of a novel Self-Healing Coating (SHC) system which is highly insulative and is capable of healing surface damages at ambient conditions. The three-layered self-healing coating was applied on flat panels of stainless steel, titanium and aluminum. In addition to self-healing, the ability of the coating to resist impact damage was demonstrated. Building upon the successful Phase I demonstration, the focus of the Phase II effort will be to further test and optimize the SHC system and implement on a prototype metallic bearing. The Phase II objectives include: (i) ensuring that the self-healing coating system can be used in space environment; (ii) determining the least coating thickness that will provide both self-healing and electrical resistance; (iii) developing a suitable process for depositing the coating on components of different geometries; and (iv) developing a property and performance data set that best predicts useful life of the coating. Successful development will culminate in applying the SHC system on a prototype component and performing the needed qualification testing. We anticipate achieving a TRL of 6 by the end of the Phase II program. The work plan includes preparing coating solutions and coating flat test panels; conducting performance tests and optimizing coating thickness using coated plates; qualifying the SHC system for use in a space environment; developing a property and performance data set that best predicts useful life of the coating; applying SHC system to a prototype hardware; and evaluating performance of coating on prototype hardware.
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High Performance Hybrid RANS-LES Simulation Framework for Turbulent Combusting Flows, Phase I
data.nasa.gov | Last Updated 2018-07-19T15:51:08.000ZThe innovation proposed here is a computational framework for high performance, high fidelity computational fluid dynamics (CFD) to enable accurate, fast and robust simulation of unsteady turbulent, reacting or non-reacting flows involving real or ideal fluids. This framework will provide a state-of-the-art unsteady turbulent flow simulation capability by laying the foundation for the incorporation of Hybrid RANS-LES (HRLES) methods which are a blend of Reynolds Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) approaches. This design and analysis tool will be built on a currently existing solver called Loci-STREAM which has been developed by the proposing firm under funding from NASA over the last four years. The work proposed here will result in a state-of-the-art design and analysis tool to enable the accurate modeling of small valves, turbopumps, combustion devices, etc. which constitute critical components of versatile space propulsion engines with deep throttling capability as part of NASA's Vision for Space Exploration Mission. Of particular relevance to NASA, this design and analysis tool will provide improved understanding and quantification of the time-varying, reacting flow environments in the thrust chamber assembly of space propulsion engines.
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Chicago Public Schools - Elementary School Attendance Boundaries SY1718
data.cityofchicago.org | Last Updated 2018-08-08T14:36:56.000ZAttendance boundaries for elementary schools in the Chicago Public Schools district for school year 2017-2018. Generally, all students in the applicable elementary school grades who live within one of these boundaries may attend the school. To view or use these shapefiles, compression software, such as 7-Zip, and special GIS software, such as Google Earth or ArcGIS, are required.
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400 W Stirling Convertor for kW-Class Space Power System, Phase I
data.nasa.gov | Last Updated 2018-07-19T10:46:53.000ZSCCAQ Energy, LLC (SCCAQ), in collaboration with Temple University and Infinia Technology Corporation (ITC), is pleased to propose a Stirling Kilopower Innovative Prototype (SKIP) that is ideally suited for use with fission-based Space Nuclear Power Systems (SNPS) and/or Nuclear Electric Propulsion (NEP) systems. SKIP adapts the ongoing development of a 400-W free-piston Stirling (FPS) engine for terrestrial applications to meet NASA needs for SNPS. This proposal is specifically addressed to STTR Topic T3 (Space Power and Energy Storage), with an emphasis on Subtopic T3.01. The proposed effort will be supported by Temple University SEEE lab personnel and will heavily leverage engineering support from Infinia Technology Corporation (ITC). This proposal is based on adapting newly developed 400-W engine at ITC to current NASA needs for an extremely reliable, robust, and high performance space power engine for Kilopower fission thermal conversion, among other potential power system heat sources. The key change that is needed to develop a SKIP demonstration unit is to modify the heater head to be suitable for interface with a space reactor system as a heat source.
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Library Branches with Discovery Rooms
data.montgomerycountymd.gov | Last Updated 2019-05-31T12:49:30.000ZDemographic and asset information of public libraries Update Frequency: Annual
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Creating Healthy Places Child Focused Interventions and Student Weight Status County Map
health.data.ny.gov | Last Updated 2017-09-14T12:26:03.000ZThis layered map shows the locations of Creating Healthy Places interventions that are targeted towards children and the percentage of students (elementary, middle, and high school) who are obese (95th percentile or higher) by county (source: Student Weight Status Category Reporting System). The purpose of the Creating Healthy Places initiative is to implement community level interventions to promote healthy lifestyles to prevent obesity and type 2 diabetes. The lighter shaded counties have a lower percentage of obese students. The darker shaded counties have a higher percentage of obese students. This map can help identify areas that could benefit from more community level and school level interventions like the ones implemented through the Creating Healthy Places Initiative. The "About" tab contains additional details concerning this dataset.
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Feed The Future Zambia Baseline Population Based Survey
data.usaid.gov | Last Updated 2018-11-13T05:14:36.000ZThe Zambia Population-Based Survey (PBS) provides a comprehensive assessment of the current status of agriculture and food security in five districts — Chipata, Katete, Lundazi, Nyimba, and Petauke in Zambia. The PBS, which was conducted in November and December of 2012, measured household demographic information, dwelling characteristics, prevalence of poverty, consumption expenditure, hunger, and women's empowerment in Agriculture Index (WEAI).