Results 41 to 50 of about 229,257 (296)

Supernova Explosions in the Early Universe: Evolution of Radiative Remnants and the Halo Destruction Efficiency

, 2005
We study the evolution of supernova (SN) remnants of the first stars, taking proper account of the radiative feedback of the progenitor stars on the surroundings.
Couchman H. M. P., Fukugita M., Ikeuchi S., Naoki Yoshida, Terlevich R., Tetsu Kitayama   +5 more
core   +2 more sources

Laser Metal Deposition of Aluminum Alloys 7075 and 5083 with the Addition of Volatile Alloying Elements through Powder Blending

Advanced Engineering Materials, EarlyView.
This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen, Anastasiya Toenjes, Annika Bohlen, Thomas Seefeld   +3 more
wiley   +1 more source

Research on the Explosive Characteristics of Oil and Gas Mixture in Urban Drainage Pipeline

Chemical Engineering Transactions, 2017
To test explosive characteristics of the oil and gas mixture in urban drainage pipeline, we select six groups of the mixtures with different proportions of gasoline, methane and water, use 20L explosive ball experimental device in testing explosion rules
Shuqi Ma, Shuran Lyu, Qiujie Zhan
doaj   +1 more source

The First Supernova Explosions in the Universe

, 2003
We investigate the supernova explosions that end the lives of massive Population III stars in low-mass minihalos (M~10^6 M_sun) at redshifts z~20. Employing the smoothed particle hydrodynamics method, we carry out numerical simulations in a cosmological ...
Lars Hernquist, Larson R. B., Naoki Yoshida, Volker Bromm   +3 more
core   +1 more source

On‐Demand Activation of Thin Alginate Shell Encapsulated Volatile Liquid for Untethered Pneumatic Soft Actuation

Advanced Engineering Materials, EarlyView.
Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan, Jack Keddie, Byoungyoul Park, Hyun‐Joong Chung   +3 more
wiley   +1 more source

Dynamic Testing of Cold Gas Sprayed Bipolar Plates–Porous Transport Layer Coating System in Proton Exchange Membrane Water Electrolysis

Advanced Engineering Materials, EarlyView.
Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin, Marvin Erck, Kevin Jasutyn, Katja Radermacher, Andreas Bund, Mario Kurniawan   +5 more
wiley   +1 more source

Experimental study on gas explosion induced by caving friction of goaf roof

Meikuang Anquan
The collision and friction between the rock masses during the caving of the gob roof has become an important hidden danger to induce the gas explosion accident in the gob.
Jun MU, Jianqiang MI, Zhenwen LIU, Baohong CHEN, Pingping ZHAO, Xinyuan ZHANG, Feng WANG   +6 more
doaj   +1 more source

Recovery from population III supernova explosions and the onset of second generation star formation

, 2014
We use cosmological simulations to assess how the explosion of the first stars in supernovae (SNe) influences early cosmic history. Specifically, we investigate the impact by SNe on the host systems for Population~III (Pop~III) star formation and explore
Bromm, Volker, Jeon, Myoungwon, Milosavljevic, Milos, Pawlik, Andreas H.   +3 more
core   +1 more source

Coordinated Multi‐Component Gradient Engineering of Catalyst Layers for Advanced Polymer Electrolyte Fuel Cells

Advanced Functional Materials, EarlyView.
This work presents a continuous linear gradient catalyst layer design, a general strategy for improving membrane electrode assemblies across electrochemical devices. Fabricated via a dual‐nozzle spray coating method, the architecture controls the Pt/carbon ratio, ionomer content and ionomer type across the catalyst layer, enhancing proton conduction ...
Shangwei Zhou, Matt P. Tudball, Yiming Guo, Bia Brandt, Adam Zucconi, Wenjia Du, Junfu Bu, Daniel H. C. Wan, Jianuo Chen, Emanuele Magliocca, Feng Ryan Wang, Alexander J.E. Rettie, Patrick S. Grant, Paul R. Shearing, Rhodri Jervis, Thomas S. Miller   +15 more
wiley   +1 more source

New evidence on the origin of the microquasar GRO J1655-40 [PDF]

, 2007
Aims. Motivated by the new determination of the distance to the microquasar GRO J1655-40 by Foellmi et al. (2006), we conduct a detailed study of the distribution of the atomic and molecular gas, and dust around the open cluster NGC 6242, the possible ...
Alvarez, Bailyn, Benaglia, Bronfman, Butt, Combi, Combi, Condon, Duncan, Foellmi, Glushkova, Grabelsky, Grabelsky, Huang, I. F. Mirabel, Israelian, J. A. Combi, Junkes, Koo, L. Bronfman, McClintock, Mirabel, Mirabel, Mirabel, Paredes, Ribó, Russeil, Sala   +27 more
core   +3 more sources