Results 71 to 80 of about 23,731 (295)

New testing method for the evaluation of topographical gradients of varying strength

Physics of Fluids, 2023
Passive gradient motion found in nature is becoming a point of interest for heat exchange and green energy technologies. Surfaces with a topographical gradient could potentially enhance heat exchanger performance, promote dropwise vs filmwise condensation, or delay icing on wind turbines by assisting in the removal of condensed or impacted droplets ...
Kirill Misiiuk, Richard Blaikie, Andrew Sommers, Sam Lowrey   +3 more
openaire   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Rostrocaudal polarity of the tectum in birds:correlation of en gradient and topographic order in retinotectal projection

, 1992
Rostrocaudal polarity of the tectum is first detectable at embryonic day 2 (E2) in the chick by the rostrocaudal gradient of en expression. When ectopic tectum is produced by heterotopic transplantation at E2 in the diencephalon, the gradient of en ...
Itasaki, N, Nakamura, H
core   +1 more source

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

Deformation induced topographic effects in inversion of temporal gravity changes: First look at Free Air and Bouguer terms

Contributions to Geophysics and Geodesy, 2015
We review here the gravitational effects on the temporal (time-lapse) gravity changes induced by the surface deformation (vertical displacements). We focus on two terms, one induced by the displacement of the benchmark (gravity station) in the ambient ...
Peter VAJDA, Pavol ZAHOREC, Juraj PAPČO, Anna KUBOVÁ   +3 more
doaj   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Multi-Scenario Prediction of Dynamic Responses of the Carbon Sink Potential in Land Use/Land Cover Change in Areas with Steep Slopes

Applied Sciences
Terrestrial ecosystems are vital carbon sinks that can effectively restrain the rise in CO2 in the atmosphere. How ecosystem carbon storage (CS) in semi-arid watershed areas with slow urbanization is affected by comprehensive factors of the environment ...
Wanli Wang, Zhen Zhang, Yangyang Wang, Jing Ding, Guolong Li, Heling Sun, Chao Deng   +6 more
doaj   +1 more source

Topographic position, but not slope aspect, drives the dominance of functional strategies of tropical dry forest trees

Environmental Research Letters, 2017
In seasonal plant communities, it is recognized that topography-related variation in water availability and solar radiation determine vegetation structure and community composition; however, the effects on functional structure, particularly through ...
M Méndez-Toribio, G Ibarra-Manríquez, A Navarrete-Segueda, H Paz   +3 more
doaj   +1 more source

Incorporating the effects of topographic amplification in the analysis of earthquake-induced landslide hazards using logistic regression [PDF]

Natural Hazards and Earth System Sciences, 2010
Seismic-induced landslide hazards are studied using seismic shaking intensity based on the topographic amplification effect. The estimation of the topographic effect includes the theoretical topographic amplification factors and the corresponding ...
S. T. Lee, T. T. Yu, W. F. Peng, C. L. Wang   +3 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source