Results 41 to 50 of about 48,058 (264)

Energy Budget in Rayleigh-Bénard Convection [PDF]

open access: yesPhysical Review Letters, 2001
5 pages, 3 figures, new version 13 Mar ...
openaire   +3 more sources

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

open access: yesAdvanced 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   +2 more
wiley   +1 more source

Effects of Dynamical and Diabatic Processes on Stationary and Transient Kelvin Waves

open access: yesJournal of Advances in Modeling Earth Systems
Atmospheric Kelvin waves (KWs) are influenced by both tropical convective heating and dry dynamical processes, but the relative contributions of these mechanisms remain uncertain.
K. M. Holube   +3 more
doaj   +1 more source

Reducing Energy Consumption in CubeSat Missions: The Integrated Antenna Approach

open access: yesEngineered Science
One of the future challenges of increasing the harnessed solar power is efficiently using the CubeSat sides. One of the approaches is using integrated antenna systems with solar panels or payloads.
Gulama-Garip Alisher E. Ibrayev   +7 more
doaj   +1 more source

Evaluating a Coupled Phenology‐Surface Energy Balance Model to Understand Stream‐Subsurface Temperature Dynamics in a Mixed‐Use Farmland Catchment

open access: yesWater Resources Research, 2019
Stream temperature is a key variable that controls both physical and biogeochemical processes in aquatic ecosystems. Complex physical interactions between land surface and subsurface processes make accurate simulations of stream temperature dynamics at ...
Han Qiu   +5 more
doaj   +1 more source

Research Progress on Climate Effect and Influence Mechanism of Photovoltaic Systems

open access: yesGaoyuan qixiang, 2022
Due to the global environmental crisis, energy crisis and the urgent need to deal with climate change, governments around the world have increased the use of renewable energy.The progress of photovoltaic technology and the support of government policies ...
Junxia JIANG, Xiaoqing GAO
doaj   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

open access: yesAdvanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi   +3 more
wiley   +1 more source

How Volcanic Aerosols Globally Inhibit Precipitation

open access: yesGeophysical Research Letters
Volcanic aerosols reduce global mean precipitation in the years after major eruptions, yet the mechanisms that produce this response have not been rigorously identified.
Zachary McGraw, Lorenzo M. Polvani
doaj   +1 more source

Sustainable Agriculture through Reduced Emission and Energy Efficiency: Estimation of Input–Output Energy and GHG Emission under Tunnel Cultivation of Tomato

open access: yesAgronomy, 2022
Tomato production under tunnel structures has shown promising returns in recent years in Pakistan. However, the energy use and GHGs dynamics remain largely unknown for tomato production under controlled conditions.
Qamar Ali   +6 more
doaj   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

open access: yesAdvanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali   +5 more
wiley   +1 more source

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