Starting with the burst of social media, online encyclopedias and sharing resources online, performance testing is more important than ever before. Every venture knows that it should have a fast and a reliable system. Furthermore the business needs to optimize and prepare the system to meet a higher number of users as it grows. A poor performing system can face financial losses and it could als...

In the past few years, much research on watermarking has been focused on improving robustness to attacks. The starting point of the present study was an R & D non optimised algorithm for still images but offering a good trade-off in terms of capacity, visibility and robustness, and working in a full blind manner. We focused on adapting it to video and on optimising it to the world of embedded t...

Recent multiprocessors such as Cray T3D support interprocessor communication using partitioned dimension-order routers (PDRs). In a PDR implementation, the routing logic qnd switching hardware is partitioned into multiple modules, with each module suitable for implementation as a chip. This paper proposes a method to incorporate adaptivity into such routers with simple changes to the router str...

Thesee is a 3D panel method code, which calculates the characteristic of a wing in an inviscid, incompressible, irrotational, and steady airrow, in order to design new paragliders and sails. In this paper, we present the parallelization of Thesee for low cost work-station/PC clusters. Thesee has been parallelized using the ScaLAPACK library routines in a systematic manner that lead to a low cos...

We describe an online system for classifying computer generated images and camera-captured photographic images, as part of our effort in building a complete passive-blind system for image tampering detection (project website at http: //www.ee.columbia.edu/trustfoto). Users are able to submit any image from a local or an online source to the system and get classification results with confidence ...

At the center of many lattice-based constructions is an algorithm that samples a short vector s, satisfying [A|AR − HG]s = t mod q where A,AR,H,G are public matrices and R is a trapdoor. Although the algorithm crucially relies on the knowledge of the trapdoor R to perform this sampling efficiently, the distribution it outputs should be independent of R given the public values. We present a new,...

This paper proposes a musical performance feedback system based on real-time audio-score alignment for musical instrument education of beginner musicians. In the proposed system, we do not make use of symbolic data such as MIDI, but acquire a real-time audio input from on-board microphone of smartphone. Then, the system finds onset and pitch of the note from the signal, to align this informatio...

High efficient routing is an important issue in the design of limited energy resource Wireless Sensor Networks (WSNs). Due to the characteristic of the environment at which the sensor node is to operate, coupled with severe resources; on-board energy, transmission power, processing capability, and storage limitations, prompt for careful resource management and new routing protocol so as to coun...

Mobile is taking center stage and becoming the device of preference for all aspects of communication because of our increasingly “on the go” lifestyles. With this the demands on mobile’s capability to execute increasingly complex operations are also on the rise. However, despite improvements in device computing power in the last couple of years a mobile device continues to have limitations. Mob...

Recommendation has become a key feature in the economy of a lot of companies (online shopping, search engines...). There is a lot of work going on regarding recommender systems and there is still a lot to do to improve them. Indeed nowadays in many companies most of the job is done by hand. Moreover even when a supposedly smart recommender system is designed, it is hard to evaluate it without u...