Results 111 to 120 of about 49,266 (284)

A critical role of ocean–sea ice interactions in the pronounced warmth during the Miocene Climatic Optimum

Communications Earth & Environment
The Miocene Climatic Optimum was characterized by global mean temperatures 8-10 °C above the preindustrial level, yet such extreme warmth remains difficult to reproduce in climate models.
Ning Tan, Frédéric Fluteau, Zhongshi Zhang, Gilles Ramstein, Chuncheng Guo, Pierre Sepulchre, Zhilin He, Zijian Zhang, Zhengtang Guo   +8 more
doaj   +1 more source

Spatial Heat Transport, Polar Amplification and Climate Change Policy [PDF]

, 2016
This paper is, to our knowledge, the first paper in climate economics to consider the combination of spatial heat transport and polar amplification. We simplified the problem by stratifying the Earth into latitude belts and assuming, as in North et al ...
Brock, William A., Xepapadeas, Anastasios   +1 more
core  

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

Sea Ice Loss, Water Vapor Increases, and Their Interactions with Atmospheric Energy Transport in Driving Seasonal Polar Amplification [PDF]

: The ice–albedo feedback associated with sea ice loss contributes to polar amplification, while the water vapor feedback contributes to tropical amplification of surface warming.
Feldl, Nicole, Chung, Po-Chun
core   +1 more source

Powder Optimization Strategies for Binder Jetting Printing of BaTiO3 and Ba0,6Sr0,4TiO3 Ceramics

Advanced Engineering Materials, EarlyView.
Powder optimization is investigated to enable binder jetting of BaTiO3 and Ba0.6Sr0.4TiO3 ferroelectric ceramics. The antagonistic relationship between flowability and binder compatibility is addressed through binder impregnation of granulated powders and fumed silica addition to fine powders.
Fanny Pruvost, Lionel Presmanes, Soléna Colin, Marie Vidal, Sophie Guillemet‐Fritsch   +4 more
wiley   +1 more source

Arctic warming delays the Afro-Asian monsoon retreat amplifying autumn rainfall

Environmental Research Letters
The Afro-Asian summer monsoon (AfroA-SM) provides essential rainfall for billions of people. However, in recent decades, unusually wet conditions have persisted into autumn, creating unprecedented extremes.
Jie Zhang, Haishan Chen, Weiqiang Ma, Rafi Riaz, Sidra Syed, Irfan Ullah, Jiayu Shen   +6 more
doaj   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Two Methods for Estimation of Amplifier Imbalances in Multi-Amplifier Transmission Structures [PDF]

Radioengineering, 2017
Energy efficient power amplification of multilevel constellations can be achieved by an amplification structure based on the constellation's as a sum of polar components, such as $M$ BPSK (Bi-Phase Shift Keying), that are separately amplified.
P. Montezuma, R. Dinis, S. Ribeiro, M. Beko   +3 more
doaj  

Solid‐State Diffusion and Intermetallic Phase Formation in Roll‐Bonded Mg–Zn Composites With Kirigami‐Patterned Inlay

Advanced Engineering Materials, EarlyView.
Mg–Zn composites with a thickness of 0.21 mm were fabricated using roll bonding of a kirigami‐patterned Mg alloy inlay within a Zn matrix. Thermal activation following this process led to the formation of tailored intermetallic structures, which provided the composite with enhanced flexural strength.
Yaroslav Frolov, Oleksandr Bobukh, Christian Klose, Florian Nürnberger, Hans Jürgen Maier   +4 more
wiley   +1 more source

Polar Vortex Disruptions by High Latitude Ocean Warming

Geophysical Research Letters
Mid‐latitude extreme cold outbreaks are associated with disruptions of the polar vortex, which often happen abruptly in connection to a sudden stratospheric warming.
Mostafa E. Hamouda, Alice Portal, Claudia Pasquero   +2 more
doaj   +1 more source