01794nas a2200193   4500008004100000245007800041210006900119260000900188300001200197490000700209520115700216653002101373653002001394653001301414653002201427653002201449100001201471856011701483       2013                        eng d00aAn algorithm of wavelet data compression based on wireless sensor network0 aalgorithm of wavelet data compression based on wireless sensor n  c2013  a54 - 610 v113 aFirstly, this paper gives a data aggregation algorithm based on learning automata to solve the problem that the existing data aggregation algorithm can't solve, the uneven energy cost, and the existing algorithm can't change the gathering path dynamically existing the overhead environment. In the proposed method, nodes can change its gathering path to adjust the overhead environment. All the nodes of WSN equipped with a learning automata. These leaning automata learn all the gathering path of the nodes. In the process of transmit information two kinds of data are transmitted, including data packet, knowledge packet .When the information of the nodes changes, according to the feedback of the nods, the learning automata gives the reward or punish to the current gathering path, which help to find the best gathering path. Secondly, this paper improved the wavelet data compression algorithm, which was brought out as the correlation between different data. The algorithm do not reduce much of the data relate to the original data. After the wavelet data compression, Huffman coding compression algorithm will improve the data compression ratio.10aData compression10aGatherting path10aHot node10aLearning automata10aWavelet Transform1 aLuo, X.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84879075413&partnerID=40&md5=96bdcc7d815f35b35316761219475c3d01642nas a2200229   4500008004100000245007300041210006900114260000900183300001000192490000600202520088000208653003001088653002001118653002901138653003301167653002201200653002101222100001801243700001401261700002001275856011701295       2009                        eng d00aDual watermarking scheme for copyright protection and authentication0 aDual watermarking scheme for copyright protection and authentica  c2009  a1 - 70 v73 aDigital Watermarking is used for copyright protection and authentication of digital media-image/audio/video data. In this paper, a novel dual watermarking scheme is described based on Discrete Wavelet Transforms (DWT) and Singular Value Decompositions (SVD). Unlike the existing dual watermarking schemes, both the watermark embedded using DWT and SVD are invisible in the proposed scheme. For embedding, both the images are transformed into Wavelet domain and SVD is performed further on both the images. Subsequently the singular values are summed up to find the new set of singular values. Both the watermarks get embedded in the same manner. A reliable watermark extraction scheme has been developed for the extraction of the watermarks from the distorted image. Experimental evaluation demonstrates that the proposed scheme is capable of withstanding variety of attacks.10aDigital dual watermarking10aGray-scale logo10aMultiresolution analysis10aSingular Value Decomposition10aWavelet Transform10aZig-zag sequence1 aBhatnagar, G.1 aRaman, B.1 aSwaminathan, K.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-70350656255&partnerID=40&md5=31754c14c6a8a23bba58615c2b8ff02a