Results 31 to 40 of about 3,423,079 (298)

A hydrodynamic mechanism of meteor ablation [PDF]

Astronomy & Astrophysics, 2018
Aims. We aim to obtain an approximate analytical solution to the equations of meteoroid dynamics within the frames of the suggested mechanism of ablation due to meteoroid melt spraying. Methods. We have described the droplet breakaway of the melt in terms of hydrodynamic instability theory for the case of a shallow angle of meteoroid entry.
openaire   +1 more source

F₂ excimer laser (157 nm) ablation of polymers: relation of neutral and ionic fragment detection and absorption [PDF]

, 2007
The ablation products of various polymers (triazene polymers, polyimides and glycidyl azide polymer) with 157 nm F2 laser irradiation were studied with time-of-flight mass spectroscopy, ion probe and white-light interferometry.
Kuhnke, M. (author), Dickinson, J.T. (author), Lippert, T. (author), Walton, C.D. (author), Cramer, L. (author), Pervolaraki, M. (author), Niino, H. (author), Wokaun, A. (author), Dyer, P.E. (author)   +8 more
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ANB-Ablation-Surrogates

, 2023
Ablation surrogate models trained on different portions of the total dataset. Meant to reproduce results in Section. 4 of the paper.
Afzal Ahmad (14524091)
core   +1 more source

Atrial Fibrillation Mechanisms and Implications for Catheter Ablation [PDF]

Frontiers in Physiology, 2018
AF is a heterogeneous rhythm disorder that is related to a wide spectrum of etiologies and has broad clinical presentations. Mechanisms underlying AF are complex and remain incompletely understood despite extensive research. They associate interactions between triggers, substrate and modulators including ionic and anatomic remodeling, genetic ...
Ghassen Cheniti, Ghassen Cheniti, Ghassen Cheniti, Konstantinos Vlachos, Konstantinos Vlachos, Thomas Pambrun, Thomas Pambrun, Darren Hooks, Antonio Frontera, Antonio Frontera, Masateru Takigawa, Masateru Takigawa, Felix Bourier, Felix Bourier, Takeshi Kitamura, Takeshi Kitamura, Anna Lam, Anna Lam, Claire Martin, Claire Martin, Carole Dumas-Pommier, Stephane Puyo, Xavier Pillois, Josselin Duchateau, Josselin Duchateau, Nicolas Klotz, Nicolas Klotz, Arnaud Denis, Arnaud Denis, Nicolas Derval, Nicolas Derval, Pierre Jais, Pierre Jais, Hubert Cochet, Hubert Cochet, Meleze Hocini, Meleze Hocini, Michel Haissaguerre, Michel Haissaguerre, Frederic Sacher, Frederic Sacher   +40 more
openaire   +3 more sources

A histological study of vessel wall reaction after endovenous ultrasound ablation in an animal model

Амбулаторная хирургия, 2023
Introduction. Along with the generally accepted thermal methods of saphenous varicose veins ablation, the use of non-thermal and combined methods becomes attractive.
A. V. Gavrilenko, P. E. Vakhratyan, A. G. Arakelyan, A. S. Borde, E. I. Ivanova, S. I. Shchukin, A. V. Samorodov   +6 more
doaj   +1 more source

Microscopic mechanism of ultrashort-pulse laser ablation of metals: a molecular dynamics study incorporating electronic entropy effects [PDF]

, 2023
The microscopic mechanism of metal ablation induced by ultrashort laser pulse irradiation is investigated. A two-temperature model scheme combined with molecular dynamics (TTM-MD) is developed to incorporate electronic entropy effects into the simulation
Tsuneyuki, Shinji, Tanaka, Yuta
core   +1 more source

Investigations on the oxidation behavior and removal mechanism of SiC/SiC composites by multi-pulse femtosecond laser ablation

Journal of Materials Research and Technology, 2023
SiC/SiC (SiC fiber-reinforced SiC matrix) composites have superior performance, making them promising candidates as one of the best materials for high-temperature components in aerospace applications. This investigation analyzed the morphology, structure,
Ning Zhou, Songmei Yuan, Mengxuan Gao, Wei Zhang, Jiaqi Zhang, Tianrui Hu   +5 more
doaj   +1 more source

Fabrication of Micro-Holes with High Aspect Ratios in C_f/SiC Composites Using Coaxial Waterjet-Assisted Nanosecond Laser Drilling

Micromachines
In the present study, the coaxial waterjet-assisted nanosecond laser drilling of micro-holes in Cf/SiC composites, coupled with nanosecond laser drilling in air for fabricating micro-holes with high aspect ratios, were investigated.
Chenhu Yuan, Zenggan Bian, Yue Cao, Yinan Xiao, Bin Wang, Jianting Guo, Liyuan Sheng   +6 more
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A novel HfSiO wire drawing phenomenon after ablation of SiCnws/HfCSiC coating on C/C composites

Journal of Materiomics, 2020
A SiCnws/HfCSiC coating was fabricated by a two-step chemical vapor deposition. After introducing SiC nanowires, the fracture toughness of HfCSiC coating increases by 228%.
Mingde Tong, Qiangang Fu, Shuotian Yao, Tianyu Liu, Tao Feng, Dou Hu, Lei Zhou   +6 more
doaj   +1 more source

Enhancement of ablation and ultrafast electron dynamics observation of nickel-based superalloy under double-pulse ultrashort laser irradiation

Journal of Materials Research and Technology, 2022
Temporally shaped femtosecond laser machining is a flexible and effective method to improve the efficiency and quality of cooling film holes. This study investigated the ablation of nickel-based superalloy by double-pulse femtosecond laser with different
Zhicheng Chen, Lan Jiang, Yiling Lian, Kaihu Zhang, Zenan Yang, Jingya Sun   +5 more
doaj   +1 more source