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BACKGROUND Pretreatment is not the most common strategy practiced for clopidogrel administration in elective coronary stenting. Moreover, limited information is available on the antiplatelet pharmacodynamics of a 300-mg versus a 600-mg clopidogrel loading dose, and the comparative effect of eptifibatide with these regimens is unknown. METHODS AND RESULTS(More)
Datacube queries compute aggregates over database relations at a variety of granularities. Often one wants only datacube output tuples whose aggregate value satisfies a certain condition, such as exceeding a given threshold. We develop algorithms for processing a datacube query using the selection condition internally during the computation. Thus, we can(More)
In this paper we describe an ongoing research project called the Columbia Digital News System. The goal of this project is to develop a suite of eeective interoperable tools with which people can nd relevant information (text, images, video, and structured documents) from distributed sources and track it over a period of time. Our initial focus is on the(More)
Existing datacube precomputation schemes materialize selected datacube tuples on disk, choosing the most beneficial cuboids (i.e., combinations of dimensions) to materialize given a space limit. However, in the context of a data-warehouse receiving frequent " append " updates to the database, the cost of keeping these disk-resident cuboids up-to-date can be(More)
Large organizations have a multitude of data sources across the enterprise and want to obtain business value from all of them. While the majority of these data sources may be consolidated in an enterprise data warehouse, many business units have their own data marts where analysis is carried out against data stored in multidimensional data structures. It is(More)
Matchmaking connects multiple players to participate in online player-versus-player games. Current matchmaking systems depend on a single core strategy: create fair games at all times. These systems pair similarly skilled players on the assumption that a fair game is best player experience. We will demonstrate, however, that this intuitive assumption(More)
Dynamic difficulty adjustment (DDA) is a technique for adaptively changing a game to make it easier or harder. A common paradigm to achieve DDA is through heuristic prediction and intervention, adjusting game difficulty once undesirable player states (e.g., boredom or frustration) are observed. Without quantitative objectives, it is impossible to optimize(More)
Research in the area of large-scale data management, in particular, efficient indexing and query processing when the data and the query conditions do not match exactly. Projects: • ASTERIX: developing a highly scalable parallel platform for managing semi-structured data (http://asterix.ics.uci.edu/) · Developed parallel techniques for set-similarity joins(More)