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This paper describes an approach for automatically classifying visitors of a web site according to their access patterns. User access logs are examined to discover clusters of users that exhibit similar information needs; e.g., users that access similar pages. This may result in a better understanding of how users visit the site, and lead to an improved(More)
We present RIFFA 2.0, a reusable integration framework for FPGA accelerators. RIFFA 2.0 provides communication and synchronization for FPGA accelerated applications using simple interfaces for hardware and software. Our goal is to expand the use of FPGAs as an acceleration platform by releasing, as open source, a framework that easily integrates software(More)
—We present RIFFA, a reusable integration framework for FPGA accelerators. RIFFA provides communication and synchronization for FPGA accelerated software using a standard interface. Our goal is to expand the use of FPGAs as an acceleration platform by releasing, as open source, a no cost framework that easily integrates software on traditional CPUs with(More)
—Robust real time tracking of multiple targets is a requisite feature for many applications. Online boosting has become an effective approach for dealing with the variability in object appearance. This approach can adapt its classifier to changes in appearance at the cost of additional runtime computation. In this paper, we address the task of accelerating(More)
—Real-time optical mapping technology is a technique that can be used in cardiac disease study and treatment technology development to obtain accurate and comprehensive electrical activity over the entire heart. It provides a dense spatial electro-physiology. Each pixel essentially plays the role of a probe on that location of the heart. However, the high(More)
We have built a system that engages naive users in an audio-visual interaction with a computer in an unconstrained public space. We combine audio source localization techniques with face detection algorithms to detect and track the user throughout a large lobby. The sensors we use are an ad-hoc microphone array and a PTZ camera. To engage the user, the PTZ(More)
We present RIFFA 2.1, a reusable integration framework for Field-Programmable Gate Array (FPGA) accelerators. RIFFA provides communication and synchronization for FPGA accelerated applications using simple interfaces for hardware and software. Our goal is to expand the use of FPGAs as an acceleration platform by releasing, as open source, a framework that(More)
—This paper presents an architecture of a low-power real-time object detection processor using Adaboost with Haar-Like features. We employ a register array based architecture, and introduce two architectural-level power optimization techniques ; signal gating domain for integral image extraction, and low-power integral image update. The power efficiency of(More)
The International Federation of Societies of Toxicologic Pathologists (IFSTP) proposes a common global framework for training future toxicologic pathologists who will support regulatory-type nonclinical toxicology studies. Trainees optimally should undertake a scientific curriculum of at least 5 years at an accredited institution leading to a clinical(More)