silica sulfuric acid is employed as solid acid catalyst for the clean and less hazardousprotection of carbonyl compounds as 2,4-dinitrophenylhydrazone under solvent-free conditions.

Microreboots restart fine-grained components of software systems " with a clean slate, " and only take a fraction of the time needed for full system reboot. Microreboots provide an application-generic recovery technique for In-ternet services, which can be supported entirely in middle-ware and requires no changes to the applications or any a priori knowledge of application semantics. This paper...

This work discusses an impossibility result for the Dynamic Cooperative Cleaners problem, and the relation of a specific geometric feature of the problem, known as the shape factor, to the efficiency of the operating swarm. The dynamic cooperative cleaners problem assumes a grid, having “contamination” points or tiles that form a connected region of the grid. Several agents move in this contami...

In this paper an estimator for speech enhancement based on Laplacian Mixture Model has been proposed. The proposed method, estimates the complex DFT coefficients of clean speech from noisy speech using the MMSE  estimator, when the clean speech DFT coefficients are supposed mixture of Laplacians and the DFT coefficients of  noise are assumed zero-mean Gaussian distribution. Furthermore, the MMS...

activity vary along a gradient from complete destruction in the worst case to preserved fragments of presumed pristine stands in the best. Yet the most “pristine” California grasslands represent only a small proportion of California’s current grasslands, and even they include some non-native species (Safford and Harrison 2001; Stromberg et al. 2001; Gelbard and Harrison 2003). Some grasslands m...