Arvind Swaminathan

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This paper considers the problem of component forensics and proposes a methodology to identify the algorithms and parameters employed by various processing modules inside a digital camera. The proposed analysis techniques are non-intrusive, using only sample output images collected from the camera to find the color filter array pattern; and the algorithm(More)
—In this paper we examine the effect of the receiver blocking problem on the performance of a direct-sequence ad hoc network in which a subset of the nodes employ multiple directional antennas. We present a packet transmission scheduling algorithm and a media access control (MAC) protocol that are designed to exploit the capabilities of the nodes with(More)
—In this paper, we examine a simple method to improve the performance of serial, matched-filter acquisition in direct-sequence spread-spectrum packet radio communications. Each packet transmission includes an acquisition preamble, and the preamble sequence is changed at the boundaries of prede-fined time epochs based on a pseudorandom sequence generator. It(More)
—Three simple, robust distributed channel-access protocols are presented that result in efficient spatial reuse of traffic channels in a direct-sequence spread-spectrum packet radio network consisting of an arbitrary mix of nodes with directional antennas and nodes with omnidirectional antennas. Each protocol uses an RTS/CTS channel-access control-packet(More)
—the paper proposes RecoProd-a recommender system which uses sentiment analysis techniques to provide the best products for the customers. The system uses the existing product reviews upon which sentiment classification is carried out. RecoProd consists of an Information Retrieval component which extracts the reviews from the e-commerce websites using the(More)
Visual sensor technologies have experienced tremendous growth in recent decades, and digital devices are becoming ubiquitous. Digital images taken by various imaging devices have been used in a growing number of applications, from military and reconnaissance to medical diagnosis and consumer photography. Consequently, a series of new forensic issues arise(More)
We present a new distributed routing protocol for direct-sequence spread-spectrum, mobile ad hoc packet radio networks that contain a mix of nodes with directional antennas and nodes with omnidirectional antennas. Two components of the routing protocol are jointly designed: a new congestion-based link metric that is utilized to identify multiple routes with(More)
— In this paper we examine a technique to improve the performance of serial, matched-filter acquisition in direct-sequence spread-spectrum packet radio communications. Each packet transmission includes an acquisition preamble, and the preamble sequence is changed at the boundaries of predefined time epochs based on a pseudorandom sequence generator. The(More)
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