Presently there are issues related to retrieval of satellite images from huge database wherein the data goes on mushrooming day by day .The low bit rate configuration are causing problems such as noise, inherent artefact .Therefore to overcome these issues a new block truncation coding using dot diffusion technique is proposed in this paper. The dot diffusion technique has the characteristic of...

Cache optimization is a crucial technique for most numerical code to exploit the performance of modern processors. It can be classified into improving access locality, and prefetching. Inherent algorithm constrains often limit the first approach which typically uses a blocking technique. While there exist automatic prefetching mechanism in hardware and/or compilers, they can not complement bloc...

Dense linear algebra computations such as matrix factorization require the technique of`block-partitioned algorithms' for their eecient implementation on memory-hierarchy processors. For scalar-based distributed memory multiprocessors, the register, cache and oo-processor memory levels of the memory hierarchy all aaect the optimal block-partition size for such algorithms. Most studies on matrix...

We use a cluster ensemble to determine the number of clusters, k, in a group of data. A consensus similarity matrix is formed from the ensemble using multiple algorithms and several values for k. A random walk is induced on the graph defined by the consensus matrix and the eigenvalues of the associated transition probability matrix are used to determine the number of clusters. For noisy or high...

Dimensionality reduction and clustering have been the subject of intense research efforts over the past few years [2]. They offer an approach of knowledge extraction from huge amounts of data. Although some of these techniques are effective at achieving lower data dimensions, very few focused on scaling the techniques to tackle data sets that might not fit into memory. Non negative matrix facto...

In recent years, adductor canal block (ACB) has been introduced as an alternative for femoral nerve block with a great advantage of preserving or minimally reducing quadriceps strength. The technique is relatively easy and is performed under ultrasound guidance. Despite growing evidence regarding efficacy and safety of ACB following knee surgery, use of ACB is still limited to high volume ortho...

We improve the performance of sparse matrix-vector multiply (SpMV) on modern cache-based superscalar machines when the matrix structure consists of multiple, irregularly aligned rectangular blocks. Matrices from finite element modeling applications often have this kind of structure. Our technique splits the matrix, A, into a sum, A1 + A2 + . . . + As, where each term is stored in a new data str...

‎A rank equality is established for the sum of finitely many tripotent matrices via elementary block matrix operations‎. ‎Moreover‎, ‎by using this equality and Theorems 8 and 10 in [Chen M‎. ‎and et al‎. ‎On the open problem related to rank equalities for the sum of finitely many idempotent matrices and its applications‎, ‎The Scientific World Journal 2014 (2014)‎, ‎Article ID 702413‎, ‎7 page...