Results 31 to 40 of about 325,875 (165)

PARTICLE PRODUCTION BY THE THICK-WALLED BUBBLE [PDF]

Modern Physics Letters A, 2004
The spectrum of created particles during the tunneling process, leading to the decay of a false vacuum state, is studied numerically in the thick-wall approximation. It is shown that in this case the particle production is very intensive for small momenta. The number of created particles is nearly constant n(p)≈1 for 4≤p≤500.
openaire   +2 more sources

Study of the Effects of Wall Thickness and Size Variations on the Rupture Risk of Cerebral Aneurysms Using FSI Simulations

Applied Sciences
Cerebral aneurysms come in a wide range of shapes and sizes; they can also evolve over time, presenting significant changes. Large aneurysms are generally thought to be more prone to rupture, but rupture has also been observed in small aneurysms ...
Daniel Díaz, Álvaro Valencia
doaj   +1 more source

Wall Thickness Uniformity in ISF of Hydraulic Support: System Design, Finite Element Analysis and Experimental Verification

Machines, 2023
Uniform wall thickness plays an essential role in avoiding forming failure in incremental sheet forming. However, it is challenging to promote the uniform distribution of wall thickness in single-pass forming of high wall angle and complex three ...
Miao Shang, Yan Li, Mingshun Yang, Yunshuai Chen, Lang Bai, Pengyang Li   +5 more
doaj   +1 more source

Steady State Response Analysis of a Tubular Piezoelectric Print Head

Sensors, 2016
In recent years, inkjet technology has played an important role in industrial materials printing and various sensors fabrication, but the mechanisms of the inkjet print head should be researched more elaborately.
Jiaqing Chang, Yaxin Liu, Bo Huang
doaj   +1 more source

Thyroid Function and Carotid Wall Thickness [PDF]

The Journal of Clinical Endocrinology & Metabolism, 2004
Decreased serum TSH levels predict vascular mortality in older people. There is a need to investigate mechanisms that could explain this association. This study was designed to investigate the relationship between thyroid function and the carotid intima-media thickness (IMT).
Henry, Völzke, Daniel M, Robinson, Ulf, Schminke, Jan, Lüdemann, Rainer, Rettig, Stephan B, Felix, Christof, Kessler, Ulrich, John, Wieland, Meng   +8 more
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Where is the gap after a 90 W/4 s very‐high‐power short‐duration ablation of atrial fibrillation?: Association with the left atrial‐pulmonary vein voltage and wall thickness

Journal of Arrhythmia
Background Although pulmonary vein isolation (PVI) for atrial fibrillation (AF) utilizing radiofrequency (RF) applications with a very high‐power and short‐duration (vHPSD) has shortened the procedure time, the determinants of pulmonary vein (PV) gaps in
Moyuru Hirata, Koichi Nagashima, Ryuta Watanabe, Yuji Wakamatsu, Shu Hirata, Sayaka Kurokawa, Yasuo Okumura   +6 more
doaj   +1 more source

Thin and thick bubble walls III: wall energy

Journal of Cosmology and Astroparticle Physics
We study the energy-momentum tensor of a bubble wall beyond the approximation of an infinitely thin wall. To this end, we discuss the proper decomposition into wall and bulk contributions, and we use a systematic method to calculate the energy-momentum tensor at any order in the wall width.
Mégevand, Ariel, Membiela, Federico Agustín   +1 more
openaire   +4 more sources

Cervical Esophageal Characteristics in Smokers Versus Non-Smokers: An Ultrasonographic Comparative Analysis

Diagnostics
Background/Objective: Smoking is known to be associated with reflux-related mucosal damage and deleterious esophageal outcomes, yet no non-invasive imaging biomarkers of smoking-induced esophageal remodeling have been identified.
Muhammed J. Alsaadi, Abdulrahman M. Alfuraih   +1 more
doaj   +1 more source

Research on Influence of CMM Sampling Points on Detection of Feature Parameters for Turbine Blade

Xibei Gongye Daxue Xuebao, 2019
Sampling plan is an essential part for measuring profile of turbine blade with coordinates measuring machine(CMM), and the detection of feature parameters is a key component of turbine blade inspection.

doaj   +1 more source

The Effect of Wall Thickness and Scanning Speed on the Martensitic Transformation and Tensile Properties of Selective Laser Melted NiTi Thin-Wall Structures

Metals, 2022
In this study, we analyzed the coupling effect of laser scanning speed and wall thickness on the phase transformation behavior and tensile properties of selective laser melted NiTi thin-wall structures.
Fangmin Guo, Yanbao Guo, Xiangguang Kong, Zhiwei Xiong, Shijie Hao   +4 more
doaj   +1 more source