Results 141 to 150 of about 271,699 (362)

Fill and vent quick disconnect [PDF]

open access: yes, 1972
Hydraulic disconnect coupling on ground serving half of spacecraft refrigeration cooling system employs movable center stem for venting and closing nipple poppet.
Boerner, R. Y., Hedrick, R. W.
core   +1 more source

Human hypoxia models in aerospace medicine: Potential applications for human pharmacological research

open access: yesBritish Journal of Clinical Pharmacology, EarlyView.
Aerospace medicine required controlled terrestrial models to investigate influences of altered atmosphere conditions, such as hypoxia, on human health and performance. These models could potentially be expanded to encompass disease conditions or treatment targets regulated through hypoxia or hypercapnia.
Titiaan E. Post   +4 more
wiley   +1 more source

Sensitive characteristics of ZnO nano gas sensor based on dynamic temperature modulation

open access: yesResults in Physics, 2020
In this paper, nano ZnO gas sensing materials and sensors are designed and fabricated by hydrothermal method. Focus on the selectivity problem of metal oxide gas sensors, a novel dynamic temperature modulation test method is proposed, and six ...
Yue Wu, Nianzhi Huang, Jing Wang
doaj  

Land landing couch dynamics computer program [PDF]

open access: yes, 1967
Computer programs perform landing stability studies of mechanical impact system designs for advanced spacecraft. The programs consider variation in spacecraft vertical and horizontal velocity, attitude and orientation, shock strut load-stroke ...
Herting, D. N.   +2 more
core   +1 more source

Evaluating Investment in Space Programs: A Case for Theoretical Pluralism

open access: yesFinancial Accountability &Management, EarlyView.
ABSTRACT A perennial question repeatedly asked since the early Mercury (USA) and Salyut (then Soviet Union) space programs has been variations on the theme of “how can the cost of space exploration be justified?” This question—which in broad terms constitutes the research question considered in this paper—continues to be directed toward space agencies ...
Basil P. Tucker, Hank C. Alewine
wiley   +1 more source

Orbital debris environment for spacecraft designed to operate in low Earth orbit [PDF]

open access: yes
The orbital debris environment model is intended to be used by the spacecraft community for the design and operation of spacecraft in low Earth orbit. This environment, when combined with material-dependent impact tests and spacecraft failure analysis ...
Anz-Meador, Phillip D.   +2 more
core   +1 more source

Apparatus and method of capturing an orbiting spacecraft [PDF]

open access: yes, 1987
Apparatus and a method of capturing an orbiting spacecraft by attaching a grapple fixture are discussed. A probe is inserted into an opening, such as a rocket nozzle, in the spacecraft until a stop on the prove mechanism contacts the spacecraft.
Gardner, Dale A., Harwell, William D.
core   +1 more source

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