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In today's OFDMA networks, the transmission power is typically fixed and the same for all the sub-carriers that compose a channel. The sub-carriers though, experience different degrees of fading and thus, the received power is different for different sub-carriers; while some frequencies experience deep fades, others are relatively unaffected. In this paper,(More)
Single-ended non-isolated DC-DC converters are used in embedded and safety critical applications. In more applications like airplanes, trains, electric vehicles, ships and distributed power systems fast fault detection is a mandatory step in order to make a suitable response to a switch fault. On the other hand, a fault tolerant topology is necessary to(More)
This paper presents the Online Social Network Investigator (OSNI), a scalable distributed system to search social network data, based on a spatiotemporal window and a list of keywords. Given that only 2% of tweets are geolocated, we have implemented and compared various state-of-art location estimation techniques. Further, to enrich the context of posts,(More)
BACKGROUND The rapid spread of Web-based social media in recent years has impacted how patients share health-related information. However, little work has studied the demographics of these users. OBJECTIVE Our aim was to study the demographics of users who participate in health-related Web-based social outlets to identify possible links to health care(More)
Fault tolerant operation of single-ended non-isolated DC-DC converters used in embedded and safety critical applications is mandatory to guaranty service continuity. This paper proposes a new, fast and efficient FPGA-based open and short-circuit switch fault diagnosis asssociated to fault tolerant converter topology. The results of Hardware-In-the-Loop and(More)
In today's OFDMA networks, the transmission power is typically fixed and the same for all the sub-carriers that compose a channel. The sub-carriers though, experience different degrees of fading and thus, the received power is different for different sub-carriers; while some frequencies experience deep fades, others are relatively unaffected. In this paper,(More)
The Multiple Listing Service, commonly known as the MLS, is the singularly most important database where real estate agents and brokers list real estate properties for sale. It is common that agents include textual comments pertinent to the property. Although the information content of comments varies, it is usually expressed in good faith and in many cases(More)
Item (e.g., product) reviews are one of the most popular types of user-generated content in Web 2.0. Reviews have been effectively used in collaborative filtering to recommend products to users based on similar users, and also to compute a product's star rating. However, little work has studied how reviews can be used to perform query-specific ranking of(More)