thermochemistry of calcium-magnesium-aluminum-silicate (cmas) and components of advanced thermal and environmental barrier coa

abstract: there is increasing interest in the degradation mechanism studies of thermal and environmental barrier coatings (tebcs) of gas turbines by molten cao-mgo-al(exp. 2)o(exp. 3)-sio(exp. 2) cmas). cmas minerals are usually referred as sili

2017-07-19 10:56:56  

autogenic-feedback training exercise (afte) mitigates the effects of spatial disorientation to simulated orion spacecraft re-e

abstract: nasa has identified a potential risk of spatial disorientation to future astronauts during re-entry of the proposed orion spacecraft. the purpose of this study was to determine if a 6-hour physiological training procedure, autogenic-fe

2017-07-19 04:50:56  

the nasa air traffic management ontology: technical documentation

abstract: this document is intended to serve as comprehensive documentation for the nasa air traffic management (atm) ontology. the atm ontology is a conceptual model that defines key classes of entities and relationships pertaining to the us na

2017-07-13 07:09:29  

utm tcl2 software requirements

abstract: the unmanned aircraft systems (uas) traffic management (utm) technical capability level (tcl) 2 software implements the utm tcl 2 software requirements described herein. these software requirements are linked to the higher level utm tc

2017-07-12 06:13:57  

chemical and microstructural changes in metallic and ceramic materials exposed to venusian surface conditions

abstract: the chemical and microstructural behavior of steels (304, 310, 316, and 1018), nickel-based alloys (beta-nial, g30, and 625), gold, coatings (4ysz, silconert(trademark) 1040 (silcotek co.), dursan(trademark)? (silcotek co.), and porcel

2017-07-12 05:22:32  

additive manufacturing of nitihf high temperature shape memory alloy

abstract: additive manufacturing of a niti-20hf high temperature shape memory alloy (htsma) was investigated. a selective laser melting (slm) process by phenix3d systems was used to develop components from nitihf powder (of approximately 25-75 m

2017-07-11 06:53:11  

qualitative future safety risk identification an update

abstract: the purpose of this report is to document the results of a high-level qualitative study that was conducted to identify future aviation safety risks and to assess the potential impacts to the national airspace system (nas) of nasa aviat

2017-07-11 06:53:00  

residual stresses in a nicry-coated powder metallurgy disk superalloy

abstract: protective ductile coatings will be necessary to mitigate oxidation and corrosion attack on superalloy disks exposed to increasing operating temperatures in some turbine engine environments. however, such coatings must be resistant to

2017-07-11 06:33:16  

mapping bone mineral density obtained by quantitative computed tomography to bone volume fraction

abstract: methods for relating or mapping estimates of volumetric bone mineral density (vbmd) obtained by quantitative computed tomography to bone volume fraction (bvf) are outlined mathematically. the methods are based on definitions of bone pr

2017-07-11 06:21:46  

integrated power, avionics, and software (ipas) space telecommunications radio system (strs) radio user's guide -- advanced ex

abstract: the integrated power, avionics and software (ipas) software defined radio (sdr) was implemented on the reconfigurable, intelligently-adaptive communication system (raics) platform, for radio development at nasa johnson space center. so

2017-07-11 06:18:46  

buckling test results and preliminary test and analysis correlation from the 8-foot-diameter orthogrid-stiffened cylinder test

abstract: results from the testing of cylinder test article sbkf-p2-cyl-ta02 (referred to herein as ta02) are presented. ta02 is an 8-foot-diameter (96-inches), 78.0-inch-long, aluminum-lithium (al-li), orthogrid-stiffened cylindrical shell simi

2017-07-10 06:45:25  

the flight optimization system weights estimation method

abstract: flops has been the primary aircraft synthesis software used by the aeronautics systems analysis branch at nasa langley research center. it was created for rapid conceptual aircraft design and advanced technology impact assessments. flo

2017-07-10 04:52:55  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

the kepler science data processing pipeline source code road map

abstract: we give an overview of the operational concepts and architecture of the kepler science processing pipeline. designed, developed, operated, and maintained by the kepler science operations center (soc) at nasa ames research center, the s

2017-07-03 09:43:11  

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