Background & Aims: One of the important aims of quantitative cardiac image processing is the clarification of myocardial motions in order to derive biomechanical behavior of the heart in the disease condition. In this study we presented a computerized analysis method for detecting the instantaneous myocardial changes by using 2D echocardiography images. Methods: The analysis was performed on th...

We propose the threshold updating method for terminating variable selection and two variable selection methods. In the threshold updating method, we update the threshold value when the approximation error smaller than the current threshold value is obtained. The first variable selection method is the combination of forward selection by block addition and backward selection by block deletion. In...

We initiate the study of sorting permutations using prefix block-interchanges, which exchange any a permutation with another non-intersecting interval. The goal is to transform given into identity as few such operations possible. give 2-approximation algorithm for this problem, well 4/3-approximation simple permutations; we prove tight lower and upper bounds on corresponding distance; bound lar...