Results 71 to 80 of about 458,695 (311)

Effects of standard and modified gravity on interplanetary ranges

open access: yes, 2011
We numerically investigate the impact on the two-body range by several Newtonian and non-Newtonian dynamical effects for some Earth-planet (Mercury, Venus, Mars, Jupiter, Saturn) pairs in view of the expected cm-level accuracy in some future planned or ...
Giannantonio T.   +3 more
core   +1 more source

Enhancing the Ultrasonic Welding of Wood Using 3D Printed Lignin Energy Directors

open access: yesAdvanced Science, EarlyView.
Sustainable manufacturing for lightweight structures using ecofriendly materials will be key to reducing material consumption and lowering carbon footprints. Here, an approach is presented to weld wood using ultrasonic vibrations with material at the joint interface to direct energy.
Muhamad Amani   +6 more
wiley   +1 more source

Origins of Mercury’s Big Heart of Iron: Exploring Pathways to Form High Core Mass Fraction Planets via N-body Simulations

open access: yesThe Astrophysical Journal
Mercury’s core mass fraction (CMF) is 0.7, more than double that of the other rocky planets in the solar system, which have CMFs of 0.3 or lower. The origin of Mercury’s large, iron-rich core remains unknown. Adding to this mystery, an elusive population
Haniyeh Tajer   +5 more
doaj   +1 more source

DETERMINATION OF COORDINATES OF THE BASIC POINTS OF THE ILLUMINATED PART OF THE SPHERICAL PLANET'S VISIBLE DISC

open access: yesOdessa Astronomical Publications, 2017
The formulae for determination of planetocentric coordinates of the basic points of an illuminated part of the visible disc of a spherical planet in projection onto the plane of the sky are derived. The formulae are deduced from general expressions using
V. V. Mikhalchuk
doaj   +1 more source

The Intra-Mercurial Planets [PDF]

open access: yesNature, 1878
NATURE (vol. xviii. p. 569) in commenting upon my letter published the previous week, regarding the discovery of Vulcan, accused me of being not only “indefinite,” but “contradictory.” The number containing my letter (p. 539) has, from some unknown cause, not yet reached me, though I am in receipt of four numbers published later.
openaire   +1 more source

Geological Mapping of the Debussy Quadrangle (H-14) - Preliminary Results [PDF]

open access: yes, 2017
Geological mapping of Mercury is essential to build an understanding of the history of the planet and to set the context for observations by BepiColombo [1].
Balme, Matthew   +3 more
core  

ZIF‐67‐Confined Pd Single‐Atom Catalysts Implanted Into Polydopamine‐Modified Bamboo Microchannels for Robust Continuous‐Flow Hydrogenation

open access: yesAdvanced Science, EarlyView.
The report presents a facile room‐temperature method to stabilize Pd single‐atom catalysts within ZIF‐67 crystals during their formation. Despite an ultralow Pd loading (0.0014 wt%), the catalytic microreactor, featuring atomically dispersed Pd‐N4 sites in ZIF‐67, demonstrates superior robustness and maximized Pd utilization, significantly ...
Sisi Yao   +6 more
wiley   +1 more source

Temperature-related Variations of 1064 nm Surface Reflectance on Mercury: Implications for Space Weathering

open access: yesThe Planetary Science Journal
It has been predicted that high equatorial temperatures on Mercury could promote thermal annealing by Ostwald ripening, where nanophase metal particles (a product of space weathering) coalesce and grow into larger, microphase particles, resulting in ...
Ariel N. Deutsch   +9 more
doaj   +1 more source

Photocatalytically Activated Cu‐N1S3 Single‐Atom Nanozyme: Enhancing Enzyme Activities and Antibacterial Synergy for Highly Efficient Fruit Preservation

open access: yesAdvanced Science, EarlyView.
This study presents S‐coordinated Cu single‐atom nanozymes (Cu/CNS) fabricated via mild photocatalytic self‐assembly strategy. The nanozyme exhibits exceptional multi‐enzyme activity and near‐perfect antimicrobial efficacy. Incorporated into chitosan‐gelatin film, it enables pH‐responsive, broad‐spectrum fruit preservation, more than doubling the shelf‐
Chuanlong Men   +7 more
wiley   +1 more source

Revisiting Electronic and Nuclear Sputtering from Ions at Mercury Using Linear Cascade Theory

open access: yesThe Planetary Science Journal
This study revisits calculations using linear cascade theory (LCT) to estimate the relative importance of the ion-induced collisional sputtering yield (also referred to as knock-on, nuclear, or kinetic sputtering) and the ion-induced electronic ...
Orenthal J. Tucker   +5 more
doaj   +1 more source

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