Results 21 to 30 of about 6,611 (148)

A Material-based Panspermia Hypothesis: The Potential of Polymer Gels and Membraneless Droplets [PDF]

Biopolymers, 113, 5, e23486, 2022, 2022
The Panspermia hypothesis posits that either life's building blocks (molecular Panspermia) or life itself (organism-based Panspermia) may have been interplanetary transferred to facilitate the Origins of Life (OoL) on a given planet, complementing several current OoL frameworks.
arxiv   +1 more source

A Microbial Monitoring System Demonstrated on the International Space Station Provides a Successful Platform for Detection of Targeted Microorganisms

Life, 2021
Closed environments such as the International Space Station (ISS) and spacecraft for other planned interplanetary destinations require sustainable environmental control systems for manned spaceflight and habitation.
Christina L. M. Khodadad, Cherie M. Oubre, Victoria A. Castro, Stephanie M. Flint, Monsi C. Roman, Charlie Mark Ott, Cory J. Spern, Mary E. Hummerick, Gretchen J. Maldonado Vazquez, Michele N. Birmele, Quinn Whitlock, Matt Scullion, Christina M. Flowers, Raymond M. Wheeler, Orlando Melendez   +14 more
doaj   +1 more source

Space weather: the solar perspective -- an update to Schwenn (2006) [PDF]

, 2021
The Sun, as an active star, is the driver of energetic phenomena that structure interplanetary space and affect planetary atmospheres. The effects of Space Weather on Earth and the solar system is of increasing importance as human spaceflight is preparing for lunar and Mars missions. This review is focusing on the solar perspective of the Space Weather
arxiv   +1 more source

Cardiovascular deconditioning during long-term spaceflight through multiscale modeling [PDF]

npj Microgravity 6(1), 27, 2020, 2020
Human spaceflight has been fascinating man for centuries, representing the intangible need to explore the unknown, challenge new frontiers, advance technology and push scientific boundaries further. A key area of importance is cardiovascular deconditioning, that is, the collection of hemodynamic changes - from blood volume shift and reduction to ...
arxiv   +1 more source

Spaceflight-induced neuroplasticity in humans as measured by MRI: what do we know so far?

npj Microgravity, 2017
Space travel poses an enormous challenge on the human body; microgravity, ionizing radiation, absence of circadian rhythm, confinement and isolation are just some of the features associated with it.
Angelique Van Ombergen, Steven Laureys, Stefan Sunaert, Elena Tomilovskaya, Paul M. Parizel, Floris L. Wuyts   +5 more
doaj   +1 more source

An automatic tree search algorithm for the Tisserand graph

Alexandria Engineering Journal, 2021
The Tisserand graph (TG) is a graphical tool commonly employed in the preliminary design of gravity-assisted trajectories. The TG is a two-dimensional map showing essential orbital information regarding the Keplerian orbits resulting from the close ...
David de la Torre Sangrà, Elena Fantino, Roberto Flores, Oscar Calvente Lozano, Celestino García Estelrich   +4 more
doaj  

During the long way to Mars: effects of 520 days of confinement (Mars500) on the assessment of affective stimuli and stage alteration in mood and plasma hormone levels.

PLoS ONE, 2014
For future interplanetary manned spaceflight, mental issues, as well as physiological problems, must inevitably be considered and solved. Mars500 is a high-fidelity ground simulation experiment that involved 520 days of confined isolation for six ...
Yue Wang, Xiaolu Jing, Ke Lv, Bin Wu, Yanqiang Bai, Yuejia Luo, Shanguang Chen, Yinghui Li   +7 more
doaj   +1 more source

Loss of physical contact in space alters the dopamine system in C. elegans

iScience, 2022
Summary: Progressive neuromuscular decline in microgravity is a prominent health concern preventing interplanetary human habitation. We establish functional dopamine-mediated impairments as a consistent feature across multiple spaceflight exposures and ...
Surabhi Sudevan, Kasumi Muto, Nahoko Higashitani, Toko Hashizume, Akira Higashibata, Rebecca A. Ellwood, Colleen S. Deane, Mizanur Rahman, Siva A. Vanapalli, Timothy Etheridge, Nathaniel J. Szewczyk, Atsushi Higashitani   +11 more
doaj  

Stress Related Shift Toward Inflammaging in Cosmonauts After Long-Duration Space Flight

Frontiers in Physiology, 2019
Space flight exerts a specific conglomerate of stressors on humans that can modulate the immune system. The mechanism remains to be elucidated and the consequences for cosmonauts in the long term are unclear. Most of the current research stems from short-
Judith-Irina Buchheim, Sandra Matzel, Marina Rykova, Galina Vassilieva, Sergey Ponomarev, Igor Nichiporuk, Marion Hörl, Dominique Moser, Katharina Biere, Matthias Feuerecker, Gustav Schelling, Detlef Thieme, Ines Kaufmann, Ines Kaufmann, Manfred Thiel, Alexander Choukèr   +15 more
doaj   +1 more source

The magnitude and effects of extreme solar particle events

Journal of Space Weather and Space Climate, 2014
The solar energetic particle (SEP) radiation environment is an important consideration for spacecraft design, spacecraft mission planning and human spaceflight.
Jiggens Piers, Chavy-Macdonald Marc-Andre, Santin Giovanni, Menicucci Alessandra, Evans Hugh, Hilgers Alain   +5 more
doaj   +1 more source