Results 31 to 40 of about 43,985 (306)

A statistical method (cross-validation) for bone loss region detection after spaceflight. [PDF]

, 2010
Astronauts experience bone loss after the long spaceflight missions. Identifying specific regions that undergo the greatest losses (e.g. the proximal femur) could reveal information about the processes of bone loss in disuse and disease.
Chu, Philip W, Fang, Jiqian, Kornak, John, Lang, Thomas F, Li, Caixia, Li, Wenjun, Lu, Ying, Zhao, Qian   +7 more
core   +3 more sources

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

Long-range DCS-Anya trajectory planning algorithm considering initial and terminal state constraints

Xibei Gongye Daxue Xuebao
In long-range Earth surface planning scenarios, the curvature of the spherical surface significantly influences trajectory planning. Addressing the problem of long-range spherical trajectory planning with initial and end-state constraints, a DCS-Anya ...
LIU Siyu, CAO Yitao, YANG Chuang, WANG Yifei, ZHANG Shunjia   +4 more
doaj   +1 more source

Effect of heat treatment on microstructure and properties of Mg-12Y-1Al alloy

Cailiao gongcheng
The microstructure of Mg-12Y-1Al alloy with solution treatment and aging treatment was studied by optical microscope, X-ray diffraction and scanning electron microscope.
NIE Jingjing, PAN Yue, YUAN Xing, XIA Xianchao, SUN Jingli, LI Yangxin, YING Tao, XIAO Lyu   +7 more
doaj   +1 more source

Impacts of the Spaceflight to the Immune System

Hanggong uju uihakoeji, 2021
Changes the gravity has a significant affect on the immune system. Astronauts experience the gravity changing during spaceflight, especially when launching and landing they experience hypergravity, and during spaceflight they feel microgravity.
Doston Sultonov, Young Hyo Kim
doaj   +1 more source

Text-to-image artificial intelligence to understand astronaut visual phenomena during spaceflight

The Pan-American Journal of Ophthalmology, 2023
Astronauts have documented visual phenomena during spaceflight. However, given that these are only experienced by the astronaut themselves, these unique neuro-ophthalmic visual phenomena occur while in space which remain poorly understood by ...
Ethan Waisberg, Joshua Ong, Mouayad Masalkhi, Nasif Zaman, Andrew G Lee, Alireza Tavakkoli   +5 more
doaj   +1 more source

Gravity‐Tolerant In‐Flight 3D Bioprinting Enabled by Stereolithography for Space Tissue Engineering

Advanced Science, EarlyView.
A flight‐compliant, closed stereolithographic 3D bioprinting system enables robust fabrication of acellular and cell‐laden hydrogel constructs under varying gravitational conditions, including microgravity and hypergravity phases. Printed structures retain dimensional fidelity and high‐resolution features, while cell viability remains high ...
Bianca Lemke, Matthias R. Kollert, Tobias Lam, Tobias Thiele, Nicolas Göbel, Lisa R. Köhn, Gabriela Korus, Lutz Kloke, Georg N. Duda   +8 more
wiley   +1 more source

Autonomous Detection of Particles and Tracks in Optical Images

Earth and Space Science, 2020
When optical navigation images acquired by the OSIRIS‐REx (Origins, Spectral Interpretation, Resource Identification, and Security‐Regolith Explorer) mission revealed the periodic ejection of particles from asteroid (101955) Bennu, it became a mission ...
Andrew J. Liounis, Jeffrey L. Small, Jason C. Swenson, Joshua R. Lyzhoft, Benjamin W. Ashman, Kenneth M. Getzandanner, Michael C. Moreau, Coralie D. Adam, Jason M. Leonard, Derek S. Nelson, John Y. Pelgrift, Brent J. Bos, Steven R. Chesley, Carl W. Hergenrother, Dante S. Lauretta   +14 more
doaj   +1 more source

Laser Ablation Sampling With Low-Power Plasma: A LA-MIP-MS Instrument for Spaceflight. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Inductively coupled plasma (ICP) is a commonly used ion source for mass spectrometry‐based chemical analysis of a wide range of materials. Traditional ICP ion sources use high power (> 1000 W) and significant gas flow (> 10 L/min), rendering them unsuitable for spaceflight, as they are too resource‐intensive for planetary spacecraft.
Farcy BJ, Graham J, Raith M, Arevalo R, Taghioskoui M, Budinoff S, McAdam A, Lee J, Danell RM, Kaplan DA, Gundersen C, McDonough WF.   +11 more
europepmc   +2 more sources

Neurosurgery and Manned Spaceflight [PDF]

Neurosurgery, 2018
ABSTRACT There has been a renewed interest in manned spaceflight due to endeavors by private and government agencies. Publicized goals include manned trips to or colonization of Mars. These missions will likely be of long duration, exceeding existing records for human exposure to extra-terrestrial conditions.
Sandip S, Panesar, Juan C, Fernandez-Miranda, Michel, Kliot, Keyoumars, Ashkan   +3 more
openaire   +2 more sources