This paper investigates on sentence extraction based single Document summarization. It saves time in our daily work once we get summarized data. Today there are so many Documents, articles, papers and reports available in digital form, but most of them lack summaries. Automatic text Summarization is a technique where a computer summarizes a text. A text is given to the computer and the computer returns a required extract of the original text document. Our methods on the sentence extraction-based text summarization task use the graph based algorithm to calculate importance of each sentence in document and most important sentences are extracted to generate document summary. These extraction based text summarization methods give an indexing weight to the document terms to compute the similarity values between sentences

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Abstract:Communication between vehicles, we present the blueprint and outcome of a small-scale mock-up using light fidelity (Li-Fi) technology, a new technology that was founded in the last January 2010 to January 2012, which still needs more organized inquiry on its sustainability for communication between vehicles.Inter-vehicle communication is an effective method with productive results that we have used in order to communicate between two vehicles and maintain safe distance between vehicles to prevent accedents. In Li-Fi technology, for communication between two vehicle data is transmitted using bulb and at receiving end we use photo detector to receive the data. In this technology there is no protocol used so it reduce the complexity. The aim of the paper is to design a module for communication between vehicles and to maintain safe distance between vehicles to prevent accedents.

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