درباره ما
NASA - National Aeronautics and Space Administration (NASA): Recent submissions
Now showing items 1501-1520 of 3613
-
NASA-LLIS-0446
Abstract: Description of Driving Event:
The first United States Microgravity Laboratory (USML-1) located in the Spacelab of the shuttle (STS-50) was not continuously monitored due to insufficient notification ...Subject(s) : Flight Equipment , Flight Operations , Ground Operations , Hardware , -
NASA-LLIS-0248
Abstract: Description of Driving Event:
An explosion occurred during the cleaning operation of a tank containing nitrogen tetroxide and residual hydrazine. The cleaning fluid used was trichloroethylene, considered ...Subject(s) : Energetic Materials - Explosive/Propellant/Pyrotechnic , Safety & Mission Assurance , -
NASA-LLIS-1110
Abstract: Description of Driving Event:
Adequate Resources for the Study of Radiation Exposure.Subject(s) : Aerospace Safety Advisory Panel , Medical , Policy & Planning , Research & Development , -
NACA-RM-L52K06
Abstract: INTRODUCTION
From the standpoint of minimum drag, high fineness ratios and nearly pointed noses are desirable in the design of supersonic missiles and airplanes. However, it is necessary for some supersonic vehicles ... -
NASA-LLIS-2696
Abstract: Abstract:
On Monday, September 24, 2007, at approximately 12:50 pm Central Daylight Time (CDT), a worker suffered second degree burns to the hands as a result of exposure to an electrical arc flash. ... -
NASA NPD 2000.1 REV F
Abstract: APPLICABILITY
This NPD applies to NASA Headquarters and NASA Centers, including Component Facilities.
In the event of any conflict between this NPD and any other NASA directive or regulation, this ... -
NACA-TN-4406
Abstract: An exploratory investigation was made by the National Advisory Committee for Aeronautics to study typical tire behavior on wet runways, to determine the mechanisms by which water on runways reduced tire forces, and to ... -
NASA-TP-1301
Abstract: Data are correlated for jet mixing noise from coannular jets with inverted flow velocity profiles. The acoustic performance of coannular jets is compared to the performance of a hypothetical single jet with the same total ...Subject(s) : ACOUSTICS , ANNULAR FLOW , DATA CORRELATION , FLOW DISTRIBUTION , FLOW VELOCITY , JET AIRCRAFT NOISE , JET MIXING FLOW , NOISE REDUCTION , POWER SPECTRA , -
NASA-LLIS-0307
Abstract: Abstract:
Five times during one month the "Unexecuted Command Counter" value was anomalous. Possible causes included incorrect incrementing of the counter, incrementing due to noise, or commands that ...Subject(s) : Flight Operations , Operations , Spacecraft , -
NASA-LLIS-1592
Abstract: Abstract:
Pointing system requirements, need to be agreed upon up front.Subject(s) : External Relations , -
NASA-LLIS-1038
Abstract: Description of Driving Event:
The Primary Reaction Control System (PRCS) pilot-operated valve (POV) controls the flow of hypergolic liquid propellants, nitrogen tetroxide (oxidizer) and monomethylhydrazine ...Subject(s) : Hardware , Parts Materials & Processes , Research & Development , Test & Verification , -
NASA NPD 8010.3 REV B
Abstract: APPLICABILITY
This NPD applies to NASA Headquarters and NASA Centers, including Component Facilities.
Compliance with requirements for limiting orbital debris generation, and the production of, and ... -
NASA-RP-1145
Abstract: The field of time series analysis is explored from its logical foundations to the most modern data analysis techniques. The presentation is developed, as far as possible, for continuous data, so that the inevitable use of ...Subject(s) : ANALYSIS , DATA , DISCRETE , FOURIER , FUNCTIONS , POWER , PROCESSES , PROCESSING , RANDOM , SERIES , SPECTRA , STOCHASTIC , TIME , TRANSFORMATION , -
NASA-LLIS-0667
Abstract: Practice:
Conduct technical reviews to validate engineering designs using a common, consistent approach which has been proven to lead to reliable and quality products. A technical review is an evaluation ... -
NACA-ACR-5D28
Abstract: INTRODUCTION
Previous tests (reference 1) showed that a spoiler in front of a conventional aileron will increases the rolling moment as well as decrease the stick force. At high spoods, even a small ...Subject(s) : AAL , AILERONS , AIRFOILS , BALANCED , CARRIED , CONTROL , CURTIS , DEVICES , DRAG , FLAPS , HIGH , HINGE , HINGED , LATERAL , LOW , MOMENTS , NACA , SPEED , SPOILERS , TAPERED , TESTS , TUNNEL , WIND , WING , WINGS , WORK , -
NASA-STD-5008 REV B
Abstract: Purpose
The purpose of this Standard is to establish requirements for the application of protective coatings to mitigate corrosion of exposed carbon steel, stainless steel, and aluminum.
This ... -
NASA-LLIS-3617
Abstract: The Earned Value Management (EVM) requirements, including Contract Performance Report (CPR) reporting, were included in the Constellation Program (CxP) Extravehicular Activity (EVA) Project prime contract. The Prime operated ...Subject(s) : Program Management. , Program Management.Acquisition / procurement strategy and planning , -
NASA-LLIS-1571
Abstract: Abstract:
Advanced Air Transportation Technologies (AATT) was a nine-year effort and experienced significant changes in documentation requirements from Headquarters and the lead center. This had an ...Subject(s) : Administration/Organization , Air-Traffic Management , Financial Management , Program & Project Management , Research & Development , -
NASA-LLIS-1491
Abstract: Abstract:
In November of 2003, the NASA Engineering and Safety Center (NESC) performed an Independent Technical Assessment of the Code Y CALIPSO satellite Proteus propulsion bus (ref. NESC Final Report ...Subject(s) : Flight Equipment , Ground Operations , NASA Standards , Program and Project Management , Range Operations , Risk Management/Assessment , Spacecraft , -
NACA-RM-A54D22
Abstract: INTRODUCTION
The gas-turbine engine driving a conventional or supersonic propeller appears to be an attractive propulsion system for certain classes of long-range airplanes designed to fly at moderately high subsonic ...