Results 91 to 100 of about 8,506,446 (327)

Direct Contact Among Galactic Civilizations by Relativistic Interstellar Spaceflight [PDF]

, 1962
Direct contact among galactic populations by relativistic interstellar ...
Sagan, Carl
core   +1 more source

Spaceflight and sport science: Physiological monitoring and countermeasures for the astronaut–athlete on Mars exploration missions

Experimental Physiology, EarlyView.
Abstract Long‐duration spaceflight impacts essentially every system in the human body, resulting in multisystem deconditioning that might impair the health and performance of crewmembers, particularly on long‐duration exploration missions to Mars. In this review, we apply the sport science model of athlete monitoring, testing and training to astronauts;
Luke DeVirgiliis, Nicholas J. Goode, Kurt W. McDowell, Kirk L. English, Robert Novo, Virina Botros, Ginika Agwu, Jessica M. Scott, Lori L. Ploutz‐Snyder   +8 more
wiley   +1 more source

Gene and MicroRNA Expression Profile Changes in ISS Crewmembers Blood Samples [PDF]

In space, living organisms are exposed to multiple stress factors including microgravity and space radiation. For humans, these harmful environmental factors have been known to cause negative health impacts such as immune dysfunction.
Berres, Mark, Crucian, Brian, Feiveson, Alan, Krieger, Stephanie, Moreno-Villanueva, Maria, Rithidech, Kanokporn, Simpson, Richard, Splinter, Sandra, Wu, Honglu, Zhang, Ye   +9 more
core   +1 more source

Causal diagramming for assessing human system risk in spaceflight

npj Microgravity
For over a decade, the National Aeronautics and Space Administration (NASA) has tracked and configuration-managed approximately 30 risks that affect astronaut health and performance before, during and after spaceflight. The Human System Risk Board (HSRB)
Erik L Antonsen, Robert J Reynolds, Jacqueline Charvat, Erin Connell, Avalon Monti, Devan Petersen, Nicholas Nartey, Wilma Anton, Ahmed Abukmail, Kristina Marotta, Mary Van Baalen, Daniel M Buckland   +11 more
semanticscholar   +1 more source

Confined spaces in space: Cerebral implications of chronic elevations of inspired carbon dioxide and implications for long‐duration space travel

Experimental Physiology, EarlyView.
Abstract Cerebrovascular regulation is critically dependent upon the arterial partial pressure of carbon dioxide (PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_{\mathrm{2}}}}}$), owing to its effect on cerebral blood flow, tissue PCO2${P_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$, tissue proton concentration, cerebral metabolism and cognitive and neuronal ...
Jay M. J. R. Carr, Philip N. Ainslie, Trevor Day   +2 more
wiley   +1 more source

Astronauts as a Human Aging Model: Epigenetic Age Responses to Space Exposure. [PDF]

Aging Cell
This longitudinal analysis of Axiom‐2 astronauts reveals that spaceflight induces a rapid andsignificant epigenetic age acceleration that is largely reversible upon return to Earth. These findings identify space exposure as a unique model for studying aging mechanisms and potentially testing geroprotective interventions.
Fuentealba M, Kim J, Hirschberg JW, Shirah B, Overbey EG, Mason C, Furman D.   +6 more
europepmc   +2 more sources

Reimagining Icarus: Ethics, Law and Policy Considerations for Commercial Human Spaceflight

Into Space - A Journey of How Humans Adapt and Live in Microgravity, 2018
Commercial human spaceflight presents an area for engaging novel human activity and objectives, to include space exploration, entertainment, transportation and extraterrestrial resource acquisition. The inherent dangers and lack of scientific and medical
Sara M. Langston
semanticscholar   +1 more source

Interstellar Migration, the Population ‘Problem’ and the Climate Emergency

Critical Quarterly, EarlyView.
Anna Hartnell
wiley   +1 more source

The search for the ultimate exercise countermeasure to preserve crew health and ensure mission success in long‐duration spaceflight

Experimental Physiology, EarlyView.
Abstract The current understanding of crew health maintenance is founded upon decades of physiological research conducted in terrestrial spaceflight analogues and in low Earth orbit, particularly on the International Space Station. However, as we progress towards the Lunar Gateway and interplanetary missions, it is imperative that the tools employed to
Rodrigo Fernandez‐Gonzalo, Stefan Schneider, Martina Heer, Anna‐Maria Liphardt   +3 more
wiley   +1 more source

50% body weight loading reduces stature increases and lumbar disc expansion from 4 h hyper‐buoyancy floatation versus 15 min sitting upright

Experimental Physiology, EarlyView.
Abstract Microgravity is associated with stature increases, back pain and post‐flight intervertebral disc (IVD) herniation. This study aims to determine whether 30 s seated 50% body weight (BW) axial loading is comparable to 15 min sitting upright in 1 g upon changes in stature, anterior lumbar IVD height (via ultrasound), passive vertebral stiffness ...
David Marcos‐Lorenzo, Christina Lysandrou, Laura Sudres, Alfonso Gil‐Martinez, Jaap Swanenburg, James Edward Clark, David Andrew Green   +6 more
wiley   +1 more source