Results 51 to 60 of about 1,638,542 (312)

Strain Rate and Temperature Effects in Nanoindentation Testing on Hardness in Selective Laser Melting IN718

open access: yes, 2021
The microstructure and mechanical hardness of Inconel 718 (INC718) hexagonal honeycomb cellular structure manufactured by selective laser melting (SLM) was studied in this work. Non-heat-treated SLM-produced samples with cell wall thicknesses of 0.4, 0.6,
Paul Wood   +3 more
core   +1 more source

Assessment of myocardial strain and strain rate by tissue doppler echocar-diography [PDF]

open access: yesСаратовский научно-медицинский журнал, 2013
The objective of the article is to review the current data on the method of quantitative evaluation of cardiac mechanics — assessment of myocardial strain and strain rate according to the results of the tissue Doppler echocardiography and prospects of ...
Ekimova N.A., Katkova LA., Furman N.V.
doaj  

Coupling effect of deformation temperature and strain rate on mechanical properties in TWIP Ti-15Mo alloy

open access: yesCailiao gongcheng, 2022
Both deformation temperature and strain rate affect the mechanical properties of β titanium alloy, and are related to the change of deformation mode in the process of plastic deformation. The effects of deformation temperature and strain rate coupling on
YAO Kai, MIN Xiaohua
doaj   +1 more source

PARK(ing) time–How park deficiency affects the biological clock in a Drosophila model of Parkinson's disease

open access: yesFEBS Letters, EarlyView.
Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara   +3 more
wiley   +1 more source

Strain rate sensitivity of sintered silver nanoparticles using rate-jump indentation

open access: yes, 2018
Nanoindentation experiments were performed at room temperature on pressure-less sintered silver nanoparticles (AgNP) samples. Two representative die attach solder materials: sintered electrically conductive silver adhesive and conventional Sn-3.0Ag ...
冯义辉   +5 more
core   +1 more source

Detonation Induced Strain in Tubes [PDF]

open access: yes, 2010
When a detonation wave propagates through a piping system, it acts as a traveling pressure load to the pipe wall. The detonation wave must be followed by an expansion wave in order to bring the combustion products to zero velocity at the ignition end ...
Karnesky, James Alan
core   +1 more source

Contribution to evaluation of mechanical properties during impact loading [PDF]

open access: yesMetalurgija, 2008
The paper analyzes the influence of the impact rate of up to 120 ms-1 with a constant energy on the relative compression of high-grade unalloyed steels, Cu and Zn, and the evaluation of energy consumed during the impact bending test at the impact rate of
Buršák, M.   +2 more
doaj  

Measurements of Strain-Rate Distributions on Material After Shpb Impact

open access: yesEngineering Transactions, 2014
We have proposed a sophisticated novel method of the SHPB experiment to measure the local strain-rate distributions on a surface of the specimen by using mechanoluminescent materials combined with a high-speed camera and an image intensifier.
M. KAWAI   +4 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

open access: yesFEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee   +7 more
wiley   +1 more source

In vivo human cardiac shortening and lengthening velocity is region-dependent and not coupled with heart rate [PDF]

open access: yes, 2015
New Findings •What is the central question of this study? Regulation of cardiac function is typically achieved by changes in heart rate (HR) and cardiac shortening velocity (strain rate; SR), but their interdependence in vivo remains poorly ...
Stöhr, Eric J.   +2 more
core   +1 more source

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