Results 121 to 130 of about 128,266 (357)

An enhanced anti-disturbance guidance scheme for powered descent phase of Mars landing under actuator fault

open access: yesInternational Journal of Advanced Robotic Systems, 2018
As a class of autonomous deep-space exploration robots, Mars lander is simultaneously affected by wind disturbance and actuator fault, which hinders precise landing on Mars.
Jianwei Xu, Jianzhong Qiao, Lei Guo
doaj   +1 more source

Mars Exploration Rover Engineering Cameras [PDF]

open access: bronze, 2003
J. N. Maki   +21 more
openalex   +1 more source

METTL3 knockout accelerates hepatocarcinogenesis via inhibiting endoplasmic reticulum stress response

open access: yesFEBS Open Bio, EarlyView.
Liver‐specific knockout of N6‐methyladenosine (m6A) methyltransferase METTL3 significantly accelerated hepatic tumor initiation under various oncogenic challenges, contrary to the previously reported oncogenic role of METTL3 in liver cancer cell lines or xenograft models. Mechanistically, METTL3 deficiency reduced m6A deposition on Manf transcripts and
Bo Cui   +15 more
wiley   +1 more source

Magnetic Properties Experiments on the Mars Exploration Rover mission [PDF]

open access: bronze, 2003
M. B. Madsen   +16 more
openalex   +1 more source

Office of exploration overview [PDF]

open access: yes
The NASA Office of Exploration case studies for FY89 are reviewed with regard to study ground rules and constraints. Three study scenarios are presented: lunar evolution, Mars evolution, and Mars expedition with emphasis on the key mission ...
Alred, John
core   +1 more source

Adenosine A3 receptor antagonists as anti‐tumor treatment in human prostate cancer: an in vitro study

open access: yesFEBS Open Bio, EarlyView.
The A3 adenosine receptors (A3ARs) are overexpressed in prostate cancer. AR 292 and AR 357, as A3AR antagonists, are capable of blocking proliferation, modulating the expression of drug transporter genes involved in chemoresistance, ferroptosis, and the hypoxia response, and inducing cell death.
Maria Beatrice Morelli   +15 more
wiley   +1 more source

Site selection for manned Mars landings: A geological perspective [PDF]

open access: yes
Issues relating to the selection of initial landing sites for manned Mars missions are discussed from a geological viewpoint. The two prime objectives for initial manned exploration should be the youngest unambiguous lava flows (to tie down the late end ...
Spudis, Paul D.
core   +1 more source

Benefits of Using a Mars Forward Strategy for Lunar Surface Systems [PDF]

open access: yes, 2009
This paper identifies potential risk reduction, cost savings and programmatic procurement benefits of a Mars Forward Lunar Surface System architecture that provides commonality or evolutionary development paths for lunar surface system elements ...
Griffin, Brand   +3 more
core   +1 more source

Soman induces endoplasmic reticulum stress and apoptosis of cerebral organoids via the GRP78‐ATF6‐CHOP signaling pathway

open access: yesFEBS Open Bio, EarlyView.
Cerebral organoids were employed as a novel model to explore the neurotoxicity of soman. Soman inhibited acetylcholinesterase activity, increased cell apoptosis and upregulated endoplasmic reticulum (ER) stress markers glucose‐regulated protein 78 (GRP78), activating transcription factor 6 (ATF6) and C/EBP homologous protein (CHOP).
Yue Wei   +7 more
wiley   +1 more source

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