We study an algebraic multigrid (AMG) method for solving elliptic finite element equations of linear elasticity problems. In this method, which has been proposed in [J.K. Kraus, SIAM J. Sci. Comput., 30 (2008), pp. 505–524], the coarsening is based on so-called edge matrices, which allows to generalize the concept of strong and weak connections, as used in classical AMG, to “algebraic vertices”...

MYOCARDIUM IN AGE AND PATHOLOGY. T. Elgeti, M. Beling, S. Hirsch, B. Hamm, J. Braun, and I. Sack Department of Radiology, Charité Universitätsmedizin Berlin, Berlin, Germany, Department of Cardiology, Angiology, Pulmonology, Charité Universitätsmedizin Berlin, Berlin, Germany, Institute of Medical Informatics, Charité Universitätsmedizin Berlin, Berlin, Germany Background: The elasticity of the...

Background LV performance is coupled to loading conditions (i.e. preload and afterload) and myocardial contractility (1,2). Therefore load-independence is an important means to isolate and study LV contractility in preclinical studies of cardiovascular pharmaceuticals and devices (3). Precise and rapid assessment of LV pressure is achieved with high fidelity catheter-based pressure transducers ...

Non-invasive methods for liver stiffness assessment have been introduced over recent years. Of these, two main methods for estimating liver fibrosis using ultrasound elastography have become established in clinical practice: shear wave elastography and quasi-static or strain elastography. Shear waves are waves with a motion perpendicular (lateral) to the direction of the generating force. Shear...

To optimize the cost and performance of complex cloud services under dynamic requirements, workflows and diverse cloud offerings, we rely on different elasticity control processes. An elasticity control process, when being enforced, produces effects in different parts of the cloud service. These effects normally evolve in time and depend on workload characteristics, and on the actions within th...

Elasticity is the foundation of cloud performance and can be considered as a great advantage and a key beneNt of cloud computing. However, there is no clear, concise, and formal deNnition of elasticity measurement, and thus no ePective approach to elasticity quantiNcation has been developed so far. Existing work on elasticity lack of solid and technical way of deNning elasticity measurement and...

The purpose of this study was to measure the technical efficiency of canola farmers and determine the underpinning factors. Required data were collected using stratified random sampling method and questionnaire survey. In this context, 157 canola farmers from Tabriz County, Iran, were asked to fill out the questionnaire in 2012-2013 growing season. The technical efficiency was evaluated using s...

this paper studies the dynamic behavior of price elasticity and its effects on the overall profit. although price elasticity has a significant effect on sales, its dynamics have not been examined so far in pricing models. in this paper, a simple pricing model is suggested in which, price elasticity is considered dynamic. the suggested pricing model is concerned with a monopolist that its object...

One of the major challenges in cloud computing is to simplify the monitoring and control of elasticity. On the one hand, the user should be able to specify complex elasticity requirements in a simple way and to monitor and analyze elasticity behavior based on his/her requirements. On the other hand, supporting tools for controlling and monitoring elasticity must be able to capture and control c...

AIM To find the normal mean values of the liver elasticity/stiffness by Acoustic Radiation Force Impulse (ARFI) Elastography in healthy subjects. MATERIAL AND METHOD This study was conducted on 137 healthy subjects without any known liver pathology or a history of jaundice by using the Siemens Acuson S2000TM Ultrasound machine with a convex probe . A routine ultrasound was also performed in e...