Radio-astronomical observations are increasingly corrupted by radio frequency interference, and on-line detection and Ðltering algorithms are becoming essential. To facilitate the introduction of such techniques into radio astronomy, we formulate the astronomical problem in an array signal processing language and give an introduction to some elementary algorithms from that Ðeld. We consider two...

The usual way to compute a low-rank approximant of a matrix H is to take its singular value decomposition (SVD) and truncate it by setting the small singular values equal to 0. However, the SVD is computationally expensive. This paper describes a much simpler generalized Schur-type algorithm to compute similar low-rank approximants. For a given matrix H which has d singular values larger than ε...

The effect of myelin basic protein (MBP) of central nervous tissue onthe protease inhibitors, alpha) antitrypsin (aι AT) and alpha;macroglobulm (агМ) wasstudied (л vitro For this purpose. 2 characteristics of the protease inhibitors were used,viz their pattern after isoelectric focusing and their trypsm-binding capacity Bothfeatures of purified a^AT disappeared in the presence o...

Multicolor flow cytometric analysis for the expression of three effector molecules, i.e., perforin (Per), granzyme A (GraA), and granzyme B (GraB), in human CD8(+) T cells demonstrated that they included five subpopulations, implying the following pathway for the differentiation of CD8(+) T cells: Per(-)GraA(-)GraB(-)-->Per(-)GraA(+)GraB(-)-->Per(low)GraA(+)GraB(-)--> Per(low)GraA(+)GraB(+)-->P...

Interactive image segmentation of images has great practical importance. Grab cut is an approach based on optimization by graph cut is implemented by Rother et. al. Grab cut is faster technique and it only requires a rough initial trimap by user interaction. But Grab Cut fails for the images having same foreground and background color Intensity Here we proposed a variation of Grab cut by applyi...

Receivers for long-code systems are for computational reasons usually based on simple matched-filter techniques, and hence suffer frommultiaccess interference. Decorrelating RAKE andMMSE receivers do not have this problem but have not been widely studied due to the apparent complexity of the inversion of a large code matrix. Tong, van der Veen Dewilde, and Sung (IEEE Tr. Signal Proc., 2003) der...