Results 161 to 170 of about 47,153 (310)

An eye on long‐duration spaceflight: Controversies, countermeasures and challenges

Experimental Physiology, EarlyView.
Abstract Space flight‐associated neuroocular syndrome (SANS) is a consequence of long‐duration space flight and is detected in two‐thirds of astronauts. In‐flight, this can cause a change in the refraction of the eyes, requiring graded hypermetropic ‘superfocus adjustable’ glasses, optic nerve head oedema and choroidal folds.
Vincent Wing Sum Ng, Susan Patricia Mollan   +1 more
wiley   +1 more source

Effects of the angle of head‐down tilt on dynamic cerebral autoregulation during combined exposure to cephalad fluid shift and mild hypercapnia

Experimental Physiology, EarlyView.
Abstract Astronauts experience combined exposure to a cephalad fluid shift and mild hypercapnia during space missions, potentially contributing to health problems. Such combined exposure may weaken dynamic cerebral autoregulation. The magnitude of cephalad fluid shift varies between individuals, and dynamic cerebral autoregulation may be affected more ...
Tomokazu Kato, Yojiro Ogawa, Ken‐ichi Iwasaki   +2 more
wiley   +1 more source

Randomized crossover trial of hand and hydrostatic casting for custom lower limb prosthetic sockets: Assessing socket comfort and fabrication time. [PDF]

PLoS One
Fatone S, Gravely A, Cutti AG, Hansen AH, Gard SA, Residual Limb Shape Capture Group.   +5 more
europepmc   +1 more source

HYDROSTATIC BEARING EXPERIMENTS [PDF]

, 1965
openaire   +2 more sources

Regional changes in cerebral blood flow between the upright and supine posture and over 3 days of bed rest

Experimental Physiology, EarlyView.
Abstract A reduction in cerebral blood flow (CBF) has been observed during spaceflight and bed rest. We aimed to examine the magnitude and regional heterogeneity of the decrease in CBF during bed rest compared to posture changes on Earth. Seventeen participants (age, 29 ± 9 years, 7 females) were studied in the upright and supine posture and over 3 ...
Carmen Possnig, Kyohei Marume, Gautam Babu, Sylvan L. J. E. Janssen, Christopher M. Hearon Jr, Katrin A. Dias, Satyam Sarma, Justin S. Lawley, Benjamin D. Levine   +8 more
wiley   +1 more source

Orbital transfer vehicle oxygen turbopump technology. Volume 2: Nitrogen and ambient oxygen testing [PDF]

The testing of a rocket engine oxygen turbopump using high pressure ambient temperature nitrogen and oxygen as the turbine drive gas in separate test series is discussed. The pumped fluid was liquid nitrogen or liquid oxygen.
Brannam, R. J., Buckmann, P. S., Chen, B. H., Church, S. J., Sabiers, R. L.   +4 more
core   +1 more source

Blood flow restriction: The acute effects of body tilting and reduced gravity analogues on limb occlusion pressure

Experimental Physiology, EarlyView.
Abstract Blood flow restriction (BFR) has been identified as a potential countermeasure to mitigate physiological deconditioning during spaceflight. Guidelines recommend that tourniquet pressure be prescribed relative to limb occlusion pressure (LOP); however, it is unclear whether body tilting or reduced gravity analogues influence LOP.
Patrick Swain, Nick Caplan, Luke Hughes
wiley   +1 more source

Pressure-tolerant Evolution in Rhodopsin of Deep-diving Whales. [PDF]

Genome Biol Evol
Takeuchi H, Hayakawa T.
europepmc   +1 more source

Jumping on the moon as a potential exercise countermeasure

Experimental Physiology, EarlyView.
Abstract The Moon's gravitational field strength (17% Earth's gravity) may facilitate the use of bodyweight jumping as an exercise countermeasure against musculoskeletal and cardiovascular deconditioning in reduced gravity settings. The present study characterised the acute physiological and kinetic responses to bodyweight jumping in simulated Lunar ...
Patrick Swain, Filipa Santos, Luke Hughes, Dan Gordon, Nick Caplan   +4 more
wiley   +1 more source

Study on the Relation Between Polished Surface Integrity and Fatigue Behavior of Low-Alloy Steel. [PDF]

Materials (Basel)
Wang Y, Xiao Y, Wang D, Wang X, Liu Z, Xu K.   +5 more
europepmc   +1 more source