Results 61 to 70 of about 53,047 (263)

Investigation of Subgrade Particles Acceleration Due To Dynamic Loading

Aceh International Journal of Science and Technology, 2017
Detail investigation on flexible pavement due to of vehicles traversed was presented in this paper. The behaviour of subgrade particles acceleration on flexible pavement are investigated and is explained in order to obtain the comprehensive understanding
Rini Kusumawardani
doaj   +1 more source

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

The high energy X-ray probe (HEX-P): Resolving the nature of Sgr A* flares, compact object binaries and diffuse X-ray emission in the Galactic center and beyond

Frontiers in Astronomy and Space Sciences
HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging (<10″ FWHM) and broad spectral coverage (0.2–80 keV) with an effective area far superior to current facilities’ (including XMM-Newton and NuSTAR).
Kaya Mori, Gabriele Ponti, Gabriele Ponti, Matteo Bachetti, Arash Bodaghee, Jonathan Grindlay, Jaesub Hong, Roman Krivonos, Ekaterina Kuznetsova, Shifra Mandel, Antonio Rodriguez, Giovanni Stel, Shuo Zhang, Tong Bao, Franz Bauer, Maïca Clavel, Benjamin Coughenour, Javier A. García, Julian Gerber, Brian Grefenstette, Amruta Jaodand, Bret Lehmer, Kristin Madsen, Melania Nynka, Peter Predehl, Ciro Salcedo, Daniel Stern, John Tomsick   +27 more
doaj   +1 more source

Tailored Hierarchical Porous Copper Architectures via Three Dimensional Printing and Pressure‐less Sintering for Next‐Generation Lithium‐Metal Batteries

Advanced Engineering Materials, EarlyView.
A hierarchical porous copper current collector is fabricated via three‐dimensional printing combined with pressureless sintering to stabilize lithium metal anodes. The interconnected architecture lowers local current density, guides uniform Li deposition within pores, and suppresses dendrite growth.
Alok Kumar Mishra, Mukul Shukla
wiley   +1 more source

Reinterpretation of Fermi Acceleration of Cosmic Rays in Terms of Ballistic Surfing Acceleration in Supernova Shocks

Physics
The applicability of the first-order Fermi mechanism—a cornerstone of the diffusive shock acceleration (DSA) model—in explaining the cosmic ray spectrum is reexamined in light of recent observations from the Magnetospheric Multiscale (MMS) mission at ...
Krzysztof Stasiewicz
doaj   +1 more source

Scheme for proton-driven plasma-wakefield acceleration of positively charged particles in a hollow plasma channel

Physical Review Special Topics. Accelerators and Beams, 2013
A new scheme for accelerating positively charged particles in a plasma-wakefield accelerator is proposed. If the proton drive beam propagates in a hollow plasma channel, and the beam radius is of order of the channel width, the space charge force of the ...
Longqing Yi (易龙卿), Baifei Shen (沈百飞), Konstantin Lotov, Liangliang Ji (吉亮亮), Xiaomei Zhang (张晓梅), Wenpeng Wang (王文鹏), Xueyan Zhao (赵学燕), Yahong Yu (郁亚红), Jiancai Xu (徐建彩), Xiaofeng Wang (王晓峰), Yin Shi (时银), Lingang Zhang (张林港), Tongjun Xu (徐同军), Zhizhan Xu (徐至展)   +13 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

The Origin of Energetic Solar Protons: Comparative Analysis of Ground-level Enhancement (GLE) Events and Non-GLE Solar Energetic Particle Events

The Astrophysical Journal Supplement Series
This study explores the acceleration origins of solar energetic particles (SEPs) by analyzing the energy spectral characteristics of particles in ground-level enhancement (GLE) events and common SEP (non-GLE) events, as well as the correlations of the ...
Yue Li, Caolong Xu, Yang Wang, Yushui Zhong, Gang Qin, Zhao Wu   +5 more
doaj   +1 more source

How interacting winds shape the mechanical feedback of massive star clusters over millions of years

Astronomy & Astrophysics
In recent years, massive star cluster environments have proved to be bright sources of very-high-energy γ-rays, in particular young clusters that are powered by the winds interacting in their cores.
Vieu T., Härer L., Reville B.
doaj   +1 more source

Turbulent pair dispersion in the presence of gravity

New Journal of Physics, 2015
Turbulent pair dispersion of heavy particles is strongly altered when particles of two different Stokes numbers (bidisperse) are considered, and this is further compounded when a uniform gravitational acceleration is present.
Kelken Chang, Benedict J Malec, Raymond A Shaw   +2 more
doaj   +1 more source