Abstract: Due to increase in the data size and limited network bandwidths there is need of compressing the data files. This compression technique saves the memory and data can be transferred faster over the network. Pattern matching on compressed files is one of the requirements for Information retrieval applications. Files compressed using (s ,c) dense code compression helps significantly to reduce the time for searching as it avoids the decompression of the compressed file for finding the pattern. In this paper we propose an approach for phrase matching in the compressed files by modifying standard string matching algorithms like hors pool and Sunday algorithm. This phrase matching can be used by search engines in relevant document retrieval for the given query. Pattern matching on (s, c) dense code compressed files had lots of advantages along with better compression ratios when compared to other standard compression algorithms. Searching the text on the compressed files is up to 8 times fast

• Publication Date: 17-Jun-2012
• DOI: 10.15224/978-981-07-2579-2-451
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Abstract: With advances in sensor networking technology, new applications involving remote and real-time data collection are becoming popular and becoming increasingly deployed. For applications that are deployed in remote locations or deployed at a large scale, over-the-air remote programming may be needed to update the application code executing on the sensor nodes. Deluge is a protocol that provides the capability of remotely reprogramming nodes in a wireless sensor networks. This protocol accomplishes reprogramming by injecting messages containing the code image into the network, which are then installed by the sensor nodes. While this protocol is very useful, it is applicable only to homogeneous networks wherein all nodes in the network must be programmed with the same code. This paper proposes a protocol that allows remote reprogramming of only a specific node in the network with a new code image. This allows different nodes to be programmed with different images, which is required in hete

• Publication Date: 17-Jun-2012
• DOI: 10.15224/978-981-07-2579-2-456
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• Downloads: 0