Results 101 to 110 of about 6,136,424 (429)

The Symmetric Stable Lévy Flights and the Feynman Path Integral [PDF]

open access: yesarXiv, 2005
We determine the solution of the fractional spatial diffusion equation in n-dimensional Euclidean space for a "free" particle by computing the corresponding propagator. We employ both the Hamiltonian and Lagrangian approaches which produce exact results for the case of jumps governed by symmetric stable L\'{e}vy flights.
arxiv  

Initial Flight Operations of the Miniature Propulsion System Installed on Small Space Probe: PROCYON

open access: yes, 2016
Initial flight operations of the miniature propulsion system I-COUPS (Ion Thruster and COld-gas Thruster Unified Propulsion System) are presented with problems found in space and its countermeasures for them.
H. Koizumi   +10 more
semanticscholar   +1 more source

Personalized medicine in human space flight: using Omics based analyses to develop individualized countermeasures that enhance astronaut safety and performance

open access: yesMetabolomics, 2013
Space flight is one of the most extreme conditions encountered by humans. Advances in Omics methodologies (genomics, transcriptomics, proteomics, and metabolomics) have revealed that unique differences exist between individuals.
Michael A. Schmidt, T. Goodwin
semanticscholar   +1 more source

Advanced Mycelium Skins for Sustainable Electronics

open access: yesAdvanced Functional Materials, EarlyView.
Mycelium skins are sustainable substrates for high‐performance electronic devices, enabling a green future. Environmentally friendly post‐growth treatments extend their durability and significantly improve their mechanical and electrical properties while maintaining their thermal stability and biodegradability.
Roland Pruckner   +11 more
wiley   +1 more source

FROM SPACE FLIGHTS TO OSTEOPOROSIS

open access: yesAnnales Kinesiologiae, 2012
Space missions (microgravity) alter the balance between bone formation/resorption and induce bone loss. This effect represents a major limiting step in the realization of long-term space missions. A similar picture is induced by prolonged immobilization at bed (bed rest).
BILANCIO, GIANCARLO   +5 more
openaire   +4 more sources

Space Flight

open access: yesIEEE spectrum, 2023
Willie D. Jones
semanticscholar   +1 more source

The role of nutritional research in the success of human space flight.

open access: yesAdvances in Nutrition, 2013
The United States has had human space flight programs for >50 y and has had a continued presence in space since 2000. Providing nutritious and safe food is imperative for astronauts because space travelers are totally dependent on launched food.
H. Lane   +4 more
semanticscholar   +1 more source

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

open access: yesAdvanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu   +14 more
wiley   +1 more source

First Operation of TES Microcalorimeters in Space with the Micro-X Sounding Rocket [PDF]

open access: yes, 2019
Micro-X is a sounding rocket-borne instrument that uses a microcalorimeter array to perform high-resolution X-ray spectroscopy. This instrument flew for the first time on July 22nd, 2018 from the White Sands Missile Range, USA. This flight marks the first successful operation of a Transition-Edge Sensor array and its time division multiplexing read-out
arxiv   +1 more source

Space flight operations [PDF]

open access: yes
Under contract to the National Aeronautics and Space Administration, the Jet Propulsion Laboratory (JPL) of the California Institute of Technology manages and operates the ground facilities required to support unmanned spacecraft in missions to the moon,

core   +1 more source

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