Results 81 to 90 of about 301,038 (298)
Nihon Kikai Gakkai ronbunshu, 2015 As low-thrust propulsion technology becomes increasingly popular, orbital estimation for low-thrust spacecraft may become an area of increasing interest. More frequent use of low-thrust propulsion to place satellites in orbit gives more opportunities for
Naoki DATE, Mai BANDO, Shinji HOKAMOTO
doaj +1 more source
Lifetime Extension of Ultra Low-Altitude Lunar Spacecraft with Low-Thrust Propulsion System [PDF]
, 2022 Jingxi Liu +3 more
openalex +1 more source
Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight
Experimental Physiology, EarlyView.Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley +1 more source
Small business innovation research. Abstracts of completed 1987 phase 1 projects [PDF]
Non-proprietary summaries of Phase 1 Small Business Innovation Research (SBIR) projects supported by NASA in the 1987 program year are given. Work in the areas of aeronautical propulsion, aerodynamics, acoustics, aircraft systems, materials and ...
core +1 more source
Nuclear radiation problems, unmanned thermionic reactor ion propulsion spacecraft [PDF]
, 1972 A nuclear thermionic reactor as the electric power source for an electric propulsion spacecraft introduces a nuclear radiation environment that affects the spacecraft configuration, the use and location of electrical insulators and the science ...
Mondt, J. F. +2 more
core +1 more source
Novel pole-sitter mission concepts for continuous polar remote sensing [PDF]
, 2012 The pole-sitter concept is a solution to the poor temporal resolution of polar observations from highly inclined, low Earth orbits and the poor high latitude coverage from geostationary orbit.
Ceriotti, Matteo +2 more
core +2 more sources
Novel orbits of Mercury, Venus and Mars enabled using low-thrust propulsion [PDF]
, 2014 Exploration of the inner planets of the Solar System is vital to significantly enhance the understanding of the formulation of the Earth and other planets.
Anderson, Pamela +2 more
core +1 more source
The Promise of Solid Lubricants for a Sustainable Future
Advanced Materials, Volume 38, Issue 8, 6 February 2026.Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher +7 more
wiley +1 more source
Field resonance propulsion concept [PDF]
A propulsion concept was developed based on a proposed resonance between coherent, pulsed electromagnetic wave forms, and gravitational wave forms (or space-time metrics).
Holt, A. C.
core +1 more source
Fast E-sail Uranus entry probe mission [PDF]
, 2014 The electric solar wind sail is a novel propellantless space propulsion concept. According to numerical estimates, the electric solar wind sail can produce a large total impulse per propulsion system mass.
Janhunen, Pekka +5 more
core +3 more sources