Results 81 to 90 of about 81,496 (301)
Remote Sensing, 2021 Many future space missions to asteroids and comets will implement autonomous or near-autonomous navigation, in order to save costly observation time from Earth tracking stations, improve the security of spacecraft and perform real-time operations ...
Mao Ye +8 more
doaj +1 more source
Radio observations of Jupiter-family comets [PDF]
Planet.Space Sci. 57:1162-1174,2009, 2008 Radio observations from decimetric to submillimetric wavelengths are now a basic tool for the investigation of comets. Spectroscopic observations allow us i) to monitor the gas production rate of the comets, by directly observing the water molecule, or by observing secondary products (e.g., the OH radical) or minor species (e.g., HCN); ii) to ...
arxiv +1 more source
Advanced NanoBiomed Research, EarlyView.Lanthanide‐based luminescence nanothermometry holds multifaceted potential for nanomedical applications, yet despite significant research advances, clinical translation of the engineered nanomaterials is still controversial and widely disputed. This is related to crucial nanotoxicological aspects that must be addressed at the preclinical level ...
Simona Premcheska +2 more
wiley +1 more source
steel research international, Volume 94, Issue 1, January 2023., 2023 This study offers a methodology to simultaneously optimize the thermal and thermomechanical behavior of a steel ladle lining using grey relational analysis (GRA) and technique for order preference by similarity to ideal solution (TOPSIS). With the proposed methodology, the best solution, the optimal levels, and quantitative contribution of lining ...
Aidong Hou, Dietmar Gruber, Shengli Jin
wiley +1 more source
Geophysical Research Letters, 2020 Observations near comet 67P by Rosetta show evidence of charged nanograins. Specifically, the ion and electron sensor (IES) observed negative particles with energy/charge (E/q) consistent with charged nanograins.
K. LLera +3 more
doaj +1 more source
Further investigation of changes in cometary rotation [PDF]
, 2018 Samarasinha & Mueller (2013) related changes of cometary rotation to other physical parameters for four Jupiter family comets defining a parameter $X$, which is approximately constant within a factor of two irrespective of the active fraction of a comet.
arxiv +1 more source
Angewandte Chemie International Edition, Accepted Article.The α‐methylene‐γ‐butyrolactone tulipalin A, a defense compound found in tulips, can polymerize via addition at the vinyl group or via ring‐opening polymerization, making it a highly promising monomer for bio‐based polymers. Since the biosynthesis of tulipalin A in plants remains elusive, we propose an alternative pathway for its synthesis starting ...
Andrea Nigl +11 more
wiley +1 more source
Cometary impacts into ocean: Thermodynamical equilibrium calculations of high-temperature O2 generation on the early Earth [PDF]
Journal of the Serbian Chemical Society, 2002 The early Earth’s atmosphere apparently differed from the present atmosphere mainly in its lack of free O2, and this absence is believed to have been indispensable for the origin of early anaerobic life forms. One of the central problems in Earth science
Premović Pavle I., Panov Katja I.
doaj +1 more source
Helmeted hornbill cranial kinesis: Balancing mobility and stability in a high‐impact joint
The Anatomical Record, EarlyView.Abstract Prokinesis—in which a craniofacial joint allows the rostrum to move relative to the braincase—is thought to confer diverse advantages in birds, mostly for feeding. A craniofacial joint would, however, be a weak link if cranial stability is important. Paradoxically, we have identified a craniofacial joint in helmeted hornbills (Rhinoplax vigil),
Mike Schindler +8 more
wiley +1 more source