Results 71 to 80 of about 28,663 (219)

Exploring Io's atmospheric composition with APEX: first measurement of 34SO2 and tentative detection of KCl [PDF]

open access: yes, 2013
The composition of Io's tenuous atmosphere is poorly constrained. Only the major species SO2 and a handful of minor species have been positively identified, but a variety of other molecular species should be present, based on thermochemical equilibrium ...
Black, J.   +5 more
core   +2 more sources

Cerebrovascular regulation during heat stress

open access: yesExperimental Physiology, EarlyView.
Abstract Given that the brain is a highly metabolic organ and is enclosed by the skull, effective regulation of cerebral blood flow (CBF), not only for oxygen and nutrients supply but also as a means of convective heat exchange, is critical for preventing excessive elevations in brain temperature.
Kanoko Ito, Manabu Shibasaki
wiley   +1 more source

High Performance Turboalternator and Associated Hardware. 1 - Design of Turboalternator [PDF]

open access: yes
Performance of two stage axial flow turbogenerator with gas bearing rotor support ...
Cohen, R., Gilroy, W. K., Spencer, W. B.
core   +1 more source

Dual clearance squeeze film damper [PDF]

open access: yes, 1985
A dual clearance hydrodynamic liquid squeeze film damper for a gas turbine engine is described. Under normal operating conditions, the device functions as a conventional squeeze film damper, using only one of its oil films.
Fleming, D. P.
core   +1 more source

Progress update of NASA's free-piston Stirling space power converter technology project [PDF]

open access: yes
A progress update is presented of the NASA LeRC Free-Piston Stirling Space Power Converter Technology Project. This work is being conducted under NASA's Civil Space Technology Initiative (CSTI).
Alger, Donald   +2 more
core   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

open access: yesReviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon   +21 more
wiley   +1 more source

Assessment of worm gearing for helicopter transmissions [PDF]

open access: yes
A high-efficiency hydrostatic worm gear drive for helicopter transmissions is assessed. The example given is for a large cargo helicopter with three 4000-kW engines and transmission reduction ratio of 110. Also contained are: an efficiency calculation, a
Chaiko, Lev
core   +1 more source

Ionization fraction and the enhanced sulfur chemistry in Barnard 1 [PDF]

open access: yes, 2016
Barnard B1b has revealed as one of the most interesting globules from the chemical and dynamical point of view. It presents a rich molecular chemistry characterized by large abundances of deuterated and complex molecules.
Aguado, A.   +9 more
core   +4 more sources

Sinking peatlands: Optimal control of subsidence

open access: yesAmerican Journal of Agricultural Economics, Volume 108, Issue 3, Page 926-953, May 2026.
Abstract Land subsidence threatens the living conditions of about 1.2 billion people worldwide in deltaic regions characterized by soft top soil. Economic activity in these areas requires lowering groundwater levels to keep the land sufficiently dry, which leaves future generations worse off by accelerating subsidence and increasing future costs.
Suphi Sen   +2 more
wiley   +1 more source

Large‐Scale Hydrogen Storage: Surface and Subsurface Challenges

open access: yesChemBioEng Reviews, Volume 13, Issue 2, April 2026.
This review examines underground hydrogen storage with emphasis on the interaction between surface facilities and subsurface reservoirs. Variable renewable hydrogen requires compression, buffering, and purification before injection, while subsurface processes influence wellhead pressure, temperature, and composition.
Mostafa Montazeri   +3 more
wiley   +1 more source

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