Results 11 to 20 of about 157,043 (159)
First wide-angle view of channelized turbidity currents links migrating cyclic steps to flow characteristics [PDF]
Nature Communications, 2016 The basal structure of turbidity currents and their association with crescent-shaped bedforms has not been observed at the field scale. Here, the author presents views of turbidity currents moving over and modifying such bedforms in a manner consistent ...
John E. Hughes Clarke
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Super-Acceleration with Cyclical Step-sizes
, 2021 We develop a convergence-rate analysis of momentum with cyclical step-sizes. We show that under some assumption on the spectral gap of Hessians in machine learning, cyclical step-sizes are provably faster than constant step-sizes. More precisely, we develop a convergence rate analysis for quadratic objectives that provides optimal parameters and shows ...
Goujaud, Baptiste +4 more
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The spiral troughs of Mars as cyclic steps [PDF]
Journal of Geophysical Research: Planets, 2013 AbstractWe combine observations of stratigraphy, morphology, and atmospheric processes to relate the spiral troughs on Mars' polar layered deposits to a class of features known as cyclic steps. Cyclic steps are quasi‐stable, repeating, and upstream‐migrating bed forms that have been studied in terrestrial and submarine environments.
Smith, Isaac B. +4 more
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Total Synthesis of Pagoamide A
Molecules, 2021 The first total synthesis of the thiazole-containing cyclic depsipeptide pagoamide A, is detailed. The longest linear sequence of the liquid-phase synthesis comprises 9 long linear steps from simple known starting materials, which led to the unambiguous ...
Fusong Wu +4 more
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Recent Advance of Domino Michael Reaction in Natural Product Synthesis
Natural Product Communications, 2021 Recent advances in the total syntheses of cyclic natural products and related compounds from 2005 to 2021, which employ domino Michael reactions as key steps, have been reviewed, focusing mainly on the domino Michael reactions catalyzed by ...
Hisahiro Hagiwara
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The Cyclicality of the Stepping-Stone Effect of Temporary Agency Employment [PDF]
SSRN Electronic Journal, 2018 This paper investigates whether the stepping stone effect of temporary agency employment moves over the business cycle. Using German administrative data for the period 1985-2012 and an estimation framework based on the timing-events model, we construct a time series of in-treatment and post-treatment effects and estimate their relationship to the ...
Jahn, Elke J., Rosholm, Michael
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Water on Mars: Do submarine cyclic steps exist on the red planet?
Progress in Earth and Planetary Science, 2018 Submarine cyclic steps have a significant impact on the evolution of the ocean floor on Earth. These upper-flow regime bedforms should be even more common in Martian reduced-gravity environments.
Svetlana Kostic, Isaac B. Smith
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Structurally Cyclic Petri Nets [PDF]
Logical Methods in Computer Science, 2015 A Petri net is structurally cyclic if every configuration is reachable from itself in one or more steps. We show that structural cyclicity is decidable in deterministic polynomial time.
Drewes Frank, Leroux Jérôme
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Beyond the Corey Reaction: One‐Step Diolefination of Cyclic Ketones. [PDF]
ChemInform, 2007 AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ekaterina D, Butova +2 more
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Green Energy & Environment, 2023 Synthesizing ring structure aviation fuels from biomass-derived platform molecules is challenging, especially for bridged ring structure aviation fuels which are typically achieved from fossil-derived chemicals.
Zhanchao Li +4 more
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