Results 111 to 120 of about 112,789 (301)

Vertical wind shear in Neptune’s upper atmosphere explained with a modified thermal wind equation

Icarus, 2018
Abstract We present observations of Neptune taken in H-(1.4–1.8 µm) and K’-(2.0–2.4 µm) bands on the nights of July 3, 2013 and August 20, 2014 from the 10-m W.M. Keck II Telescope using NIRC2 coupled to the Adaptive Optics (AO) system. We track the positions of ∼100 bright atmospheric features over a 4–5 h window on each night to derive zonal ...
Tollefson, Joshua, Pater, Imke de, Marcus, Philip S., Luszcz-Cook, Statia, Sromovsky, Lawrence A., Fry, Patrick M., Fletcher, Leigh N., Wong, Michael H.   +7 more
openaire   +2 more sources

Atomic Layer Deposition in Transistors and Monolithic 3D Integration

Advanced Functional Materials, EarlyView.
Transistors are fundamental building blocks of modern electronics. This review summarizes recent progress in atomic layer deposition (ALD) for the synthesis of two‐dimensional (2D) metal oxides and transition‐metal dichalcogenides (TMDCs), with particular emphasis on their enabling role in monolithic three‐dimensional (M3D) integration for next ...
Yue Liu, Taoyu Zou, Cheng‐Yan Xu, Liang Zhen, Yang Li, Yong‐Young Noh   +5 more
wiley   +1 more source

Magnetothermal‐Triggered Response and Self‐Healing of Recyclable and Reprocessable Nanocomposites for Actuation Systems

Advanced Functional Materials, EarlyView.
Developing recyclable materials for magnetic robotics that combine rapid response and self‐healing properties is challenging. Hence, this study focuses on the integration of magnetothermal nanoparticles into a dynamic sorbitol‐based vitrimer, a recyclable composite capable of remote actuation and self‐healing by magnetic heating.
Maria Weißpflog, Gloria Signorato, Birgit Hankiewicz, Volker Abetz   +3 more
wiley   +1 more source

A Chebyshev Polynomial‐Based Wind Speed Profile Characterization Framework: Applications in Mesoscale Model Evaluation

Wind Energy
This study presents a polynomial‐based wind speed profile characterization framework that approximates full vertical profiles using five physically meaningful Chebyshev polynomial coefficients.
Harish Baki, Sukanta Basu
doaj   +1 more source

Curvature‐Tuned Friction at Electrified Ionic Liquid Interfaces

Advanced Functional Materials, EarlyView.
Graphene curvature plays a key role in friction electrotunability at single‐asperity contacts lubricated by ionic liquids. A 9 nm radius yields stronger tunability than larger radii, with distinct friction coefficients at low and high loads indicating a shift in the slippage plane.
Wei Song, Md Ashiqur Rahman, Qianlu Zheng, Nathaniel Hawthorne, James D. Batteas, Rui Qiao, Rosa M. Espinosa‐Marzal   +6 more
wiley   +1 more source

The Role of Wind Velocity, Wind Shear, and Electric Fields in the Formation of Sporadic E (Es)

Atmosphere
The important role of neutral wind, its vertical shear, and external electric fields in the formation and localization of sporadic E (Es) are demonstrated analytically and numerically in equatorial and mid-latitude regions.
Goderdzi G. Didebulidze, Giorgi Dalakishvili, Maya Todua   +2 more
doaj   +1 more source

Direct numerical simulations of aeolian sand ripples

, 2014
Aeolian sand beds exhibit regular patterns of ripples resulting from the interaction between topography and sediment transport. Their characteristics have been so far related to reptation transport caused by the impacts on the ground of grains entrained ...
Andreotti, Bruno, Claudin, Philippe, Duran, Orencio   +2 more
core   +1 more source

How Vertical Wind Shear Affects Tropical Cyclone Intensity Change: An Overview [PDF]

, 2011
Over the last 30 years tropical cyclone (TC) intensity forecasts, for various (yet somewhat puzzling) reasons, have not achieved near the level of improvement of the TC track forecast. Although TCs have been studied intensively throughout the twentieth century, the community has surprisingly little quantitative knowledge as to how these storms interact
Thatcher, Levi, Pu, Zhaoxia
openaire   +2 more sources

Structural and Chemical Engineering of Sub‐Nanochannel Membranes Toward Ion Selectivity

Advanced Functional Materials, EarlyView.
This review summarizes recent advances in structural and chemical engineering of sub‐nanochannels for ion selectivity. We first introduce fundamental ion transport mechanisms within sub‐nanochannels, followed by strategies to tune pore size, geometry, and surface functionalities, categorized into charge‐based, ion‐recognition, hydrophilic bonding, and ...
Yuyu Su, Huacheng Zhang, Tamar L. Greaves, Qi Han, Weiwei Lei, Dan Liu   +5 more
wiley   +1 more source

Wind speed and direction shears with associated vertical motion during strong surface winds [PDF]

Strong surface winds recorded at the NASA 150-Meter Ground Winds Tower facility at Kennedy Space Center, Florida, are analyzed to present occurrences representative of wind shear and vertical motion known to be hazardous to the ascent and descent of ...
Alexander, M. B., Camp, D. W.
core   +1 more source