نتایج جستجو برای: carotid elastic modulus

تعداد نتایج: 138827  

2014
S. Boucetta

There was employed the density functional theory plane-wave pseudopotential method with local density approximation and generalized gradient approximation to investigate the structural, elastic and mechanical properties of the intermetallic compound Ni3Ga. The calculated equilibrium lattice constant and bulk modulus are in good agreement with the experimental values. The elastic constants were ...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2011
Milana O Lisunova Irina Drachuk Olga A Shchepelina Kyle D Anderson Vladimir V Tsukruk

The mechanical properties of hydrogen-bonded layer-by-layer (LbL) microcapsule shells constructed from tannic acid (TA) and poly(vinylpyrrolidone) (PVPON) components have been studied in both the dry and swollen states. In the dry state, the value of the elastic modulus was measured to be within 0.6-0.7 GPa, which is lower than the typical elastic modulus for electrostatically assembled LbL she...

Journal: :Hypertension 2001
S Boumaza S M Arribas M Osborne-Pellegrin J C McGrath S Laurent P Lacolley P Challande

Our aim was to determine the structural factors that determine the mechanical adaptation of the carotid arterial wall in stroke-prone hypertensive rats (SHRSP). Distensibility-pressure and elastic modulus-stress curves assessed by in vivo echo-tracking measurements indicated a reduction in arterial stiffness in 13-week-old SHRSP compared with Wistar-Kyoto rats (WKY). Elastin and collagen conten...

1998
P. Ravindran Lars Fast P. A. Korzhavyi J. Wills

A theoretical formalism to calculate the single crystal elastic constants for orthorhombic crystals from first principle calculations is described. This is applied for TiSi2 and we calculate the elastic constants using a full potential linear muffin-tin orbital method using the local density approximation ~LDA! and generalized gradient approximation ~GGA!. The calculated values compare favorabl...

2006
ABDULKADIR CÜNEYT AYDIN AHMET TORTUM MURAT YAVUZ

The prediction of elastic modulus is one of the fundamental facts of structural engineering studies. The performance of adaptive neuro-fuzzy inference system (ANFIS) for predicting the elastic modulus of normaland high-strength concrete was investigated. Results indicate that the proposed ANFIS modeling approach outperforms the other given models in terms of prediction capability. According to ...

Journal: :Journal of biomechanics 2015
Pinaki Bhattacharya Jordan E Kelleher Thomas Siegmund

New studies show that the elastic properties of the vocal folds (VFs) vary locally. In particular strong gradients exist in the distribution of elastic modulus along the length of the VF ligament, which is an important load-bearing constituent of the VF tissue. There is further evidence that changes in VF health are associated with alterations in modulus gradients. The role of VF modulus gradat...

Journal: :European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2010
Anna Bjällmark Britta Lind Mikael Peolsson Kambiz Shahgaldi Lars-Ake Brodin Jacek Nowak

AIMS Elastic properties of large arteries have been shown to deteriorate with age and in the presence of atherosclerotic vascular disease. In this study, the performance of ultrasonographic strain measurements was compared with conventional measures of vascular stiffness in the detection of age-dependent differences in the elastic properties of the common carotid artery (CCA). METHODS AND RES...

2015
Heidi Weberruß Raphael Pirzer Birgit Böhm Robert Dalla Pozza Heinrich Netz Renate Oberhoffer

BACKGROUND Obesity is an independent cardiovascular risk factor that contributes to the development of atherosclerosis. Subclinical forms of the disease can be assessed via sonographic measurement of carotid intima-media thickness (cIMT) and distensibility - both may already be altered in childhood. As childhood obesity increases to an alarming extent, this study compares vascular data of obese...

2016
A. Khoder M. Couach E. Bonjour

The [I001 shear modulus C44 i s known to be nearly temperature independent in the case of V3Si, an extensively studied compound for wich many authors t r ied to associate the l a t t i c e ins t ab i l i t y and the high superconducting transit ion temperature. We report new sound velocity and attenuation measurements of th i s [loo] shear mode. The temperature change of the sound velocity disp...

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