Results 11 to 20 of about 284,250 (248)
The manifestation of dryness and drought phenomena at the beginning of the 21-st century and their impact in the Republic of Moldova [PDF]
Present Environment and Sustainable DevelopmentThe aridification of the climate at the regional-european level led to the intensification and increase in the frequency of dryness and drought phenomena, including in the Republic of Moldova.
Valeriu CAZAC, Igor CODREANU
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Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks
The Astrophysical Journal Letters, 2023 The impact of the Double Asteroid Redirection Test spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos’s orbit substantially, largely from the ejection of material.
Theodore Kareta +87 more
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AerospaceRubble-pile asteroids may be the type of near-Earth object most likely to threaten Earth in a future collision event. Small-scale impact experiments and numerical simulations for large-scale impacts were conducted to clarify the size ratio of the boulder/
Wenjin Liu +7 more
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Giant Impact Events for Protoplanets: Energetics of Atmospheric Erosion by Head-on Collision
The Astrophysical Journal, 2023 Numerous exoplanets with masses ranging from Earth to Neptune and radii larger than Earth have been found through observations. These planets possess atmospheres that range in mass fractions from 1% to 30%, reflecting the diversity of atmospheric mass ...
Kenji Kurosaki, Shu-ichiro Inutsuka
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By dawn or dusk—how circadian timing rewrites bacterial infection outcomes
FEBS Letters, EarlyView.The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo +2 more
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A Recent Impact Origin of Saturn’s Rings and Mid-sized Moons
The Astrophysical Journal, 2023 We simulate the collision of precursor icy moons analogous to Dione and Rhea as a possible origin for Saturn’s remarkably young rings. Such an event could have been triggered a few hundred million years ago by resonant instabilities in a previous ...
L. F. A. Teodoro +7 more
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The role and implications of mammalian cellular circadian entrainment
FEBS Letters, EarlyView.At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
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FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
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Hypervelocity impact phenomena of LPSO-magnesium alloys
EPJ Web of Conferences, 2018 Hypervelocity impact phenomena of long period stacking ordered type magnesium alloys (LPSO-Mg) plates were examined at the impact velocities of 4 km/s and 6 km/s.
Nishida Masahiro +5 more
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Two Seismic Events from InSight Confirmed as New Impacts on Mars
The Planetary Science Journal, 2023 We report confirmed impact sources for two seismic events on Mars detected by the NASA InSight mission. These events have been positively associated with fresh impact craters identified from orbital images, which match predicted locations and sizes to ...
Ingrid J. Daubar +17 more
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