Results 61 to 70 of about 34,106 (228)

Hot bubbles of planetary nebulae with hydrogen-deficient winds - II. Analytical approximations with application to BD+30$^\circ$3639

, 2018
The first high-resolution X-ray spectroscopy of the planetary nebula BD+30$^\circ$3639 allowed to study X-ray emitting "hot bubbles" (HBs) of planetary nebulae in unprecedented detail.
Heller, René, Jacob, Ralf, Schönberner, Detlef, Steffen, Matthias   +3 more
core   +1 more source

In Situ X‐Ray Tomography and Acoustic Emission Monitoring of Damage Evolution in C/C‐SiC Composites Fabricated by Liquid Silicon Infiltration

Advanced Science, EarlyView.
This study investigates how the internal structure of fiber‐reinforced ceramic composites affects their resistance to damage. By combining 3D X‐ray imaging with acoustic emission monitoring during mechanical testing, it reveals how silicon distribution influences crack formation.
Yang Chen, Renato S. M. Almeida, Stefan Flauder, Guillaume Couégnat, Kamen Tushtev, Jürgen Horvath, Peter Wriggers, Kurosch Rezwan   +7 more
wiley   +1 more source

Experimental and numerical assessment of helium bubble lift during natural circulation for passive molten salt fast reactor

Nuclear Engineering and Technology
To remove insoluble fission products, which could possibly cause reactor instability and significantly reduce heat transfer efficiency from primary system of molten salt reactor, a helium bubbling method is employed into a passive molten salt fast ...
Won Jun Choi, Jae Hyung Park, Juhyeong Lee, Jihun Im, Yunsik Cho, Yonghee Kim, Sung Joong Kim   +6 more
doaj   +1 more source

Wigner lattice of ripplopolarons in a multielectron bubble in helium

, 2003
The properties of ripplonic polarons in a multielectron bubble in liquid helium are investigated on the basis of a path-integral variational method.
Devreese, J. T., Klimin, S. N., Silvera, I. F., Tempere, J.   +3 more
core   +2 more sources

Atomic Tuning of Metal‐Support Interactions for Pathway‐Selective CO2 Photoreduction on TiO2

Advanced Science, EarlyView.
Single‐atom Fe and Cu catalysts anchored on TiO2 steer photocatalytic CO2 reduction toward distinct pathways. Fe sites favor rapid *CO desorption and selective CO formation, whereas Cu sites stabilize *CHO intermediates, enabling deep reduction and C─C coupling. Combined spectroscopy and DFT calculations reveal how metal–support interactions and oxygen
Dongyun Kim, Wonjae Ko, Byoung‐Hoon Lee, Sanghoon Kim, Yun Do Kim, Hyunsoo Ahn, Yoon Jung, Chan Woo Lee, Kug‐Seung Lee, Eunhee Gong, Junho Lee, Minho Kim, Taeghwan Hyeon, Su‐Il In   +13 more
wiley   +1 more source

Cooper pairing and superconductivity on a spherical surface

, 2005
Electrons in a multielectron bubble in helium form a spherical, two-dimensional system coupled to the ripplons at the bubble surface. The electron-ripplon coupling, known to lead to polaronic effects, is shown to give rise also to Cooper pairing.
Devreese, J. T., Gladilin, V. N., Silvera, I. F., Tempere, J.   +3 more
core   +1 more source

Comparison of DeePMD, MTP, GAP, ACE and MACE Machine‐Learned Potentials for Radiation‐Damage Simulations: A User Perspective

Advanced Intelligent Discovery, EarlyView.
The authors evaluated six machine‐learned interatomic potentials for simulating threshold displacement energies and tritium diffusion in LiAlO2 essential for tritium production. Trained on the same density functional theory data and benchmarked against traditional models for accuracy, stability, displacement energies, and cost, Moment Tensor Potential ...
Ankit Roy, Ram Devanathan, Sarah Allec, Giridhar Nandipati, Andrew M. Casella, David J. Senor, Duane D. Johnson, Ganesh Balasubramanian, Ayoub Soulami   +8 more
wiley   +1 more source

Helium Bubble Formation and Swelling in Helium Pre-injected 316L Stainless Steel upon Fe-ion Irradiation

Yuanzineng kexue jishu
Austenitic stainless steels are widely used as the structural materials in reactors. However, due to its face centered cubic structure, austenitic stainless steels are highly susceptible to irradiation swelling.
GAO Jin1, WU Shi1, DOU Yankun1, ZHANG Chonghong2, HE Xinfu1, YANG Wen1
doaj   +1 more source

Performance Investigation of Eco‐Friendly Refrigerant Mixtures as an Alternative to R134a in Vapour‐Compression Refrigeration System

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The growing impacts of climate change and energy scarcity demand environmentally sustainable refrigeration solutions. This study investigates eco‐friendly refrigerants (R152a, R290 and R600a) and their optimized ternary mixture as alternatives to R134a. Four blend compositions were analysed using experimental testing and REFPROP 10.0 modelling
M. Periyasamy, P. Senthilkumar
wiley   +1 more source

TEM investigation of helium bubble evolution in tungsten and ZrC-strengthened tungsten at 800 and 1000°C under 40keV He+ irradiation

Nuclear Engineering and Technology
Helium-induced defect nucleation and accumulation in polycrystalline W and W0.5 wt%ZrC (W0.5ZrC) were studied in-situ using the transmission electron microscopy (TEM) combined with 40 keV He+ irradiation at 800 and 1000°С at the maximum damage level of 1
I. Ipatova, G. Greaves, D. Terentyev, M.R. Gilbert, Y.-L. Chiu   +4 more
doaj   +1 more source