The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We present an adaptive finite element method for the incompressible Navier–Stokes equations based on a standard splitting scheme (the incremental pressure correction scheme). The presented method combines the efficiency and simplicity of a splitting method with the powerful framework offered by the finite element method for error analysis and adaptivity. An a posteriori error estimate is derived which...
In this paper we develop techniques for computing elementwise conservative approximations of the flux on element boundaries for the continuous Galerkin method. The technique is based on computing a correction of the average normal flux on an edge or face. The correction is a jump in a piecewise constant or linear function. We derive a basic algorithm which is based on solving a global system of equations...
A new finite element method for fourth-order elliptic partial differential equations is presented and applied to thin bending theory problems in structural mechanics and to a strain gradient theory problem. The method combines concepts from the continuous Galerkin (CG) method, the discontinuous Galerkin (DG) method and stabilization techniques.A brief review of the CG method, the DG method and stabilization...
Abstract: We present a discontinuous Galerkin method for the plate problem. The method employs a discontinuous approximation space allowing nonmatching grids and different types of approximation spaces. Continuity is enforced weakly through the variational form. Discrete approximations of the normal and twisting moments and the transversal force, which satisfy the equilibrium condition on an element...
The echo features of mitral valve prolapse (MVP) have been characterized in hospital-based populations by the frequent occurrence of significant mitral regurgitation (MR) and left atrial (LA) enlargement. To examine the echo features of MVP in an unselected population, we studied all subjects with possible MVP (n = 151) and 151 age- and sex-matched controls from the Framingham Study. Maximal mitral...
Background: Reduced heart rate variability (HRV), a measure of cardiac autonomic tone, is associated with increased risk for cardiac events and mortality. In this study we estimated the heritability of HRV.Methods: Subjects who underwent Holter recordings at a routine examination were eligible. After excluding subjects with congestive heart failure, coronary artery disease, diabetes mellitus and...
Background: The associations of asymptomatic LV dilatation and hypertrophy with chronotropic incompetence has not been well characterized.Methods: Healthy adults (1414 men and 1601 women) underwent echocardiography and graded exercise testing. Chronotropic incompetence was assessed as: 1) failure to achieve an age-predicted target heart rate (FAIL), and 2) a low chrontropic index (CRI), a measure...
Estimates of the prevalence of mitral valve prolapse (MVP) generally, have been derived from hospital-based referral populations and are as high as 7% of men and 21% of women. To determine the prevalence of MVP in the general population diagnosed using current 2D echocardiographic criteria, we examined the echocardiograms of 3487 subjects (1842 women, 1645 men) in the Framingham Offspring Study....
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.