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Scalable execution of expensive continuous queries over massive data streams requires input streams to be split into parallel substreams. The query operators are continuously executed in parallel over these sub-streams. Stream splitting involves both partitioning and replication of incoming tuples, depending on how the continuous query is parallelized. We provide a stream splitting operator tha...

BACKGROUND Narcissism is characterized by grandiosity, low empathy, and entitlement. There has been limited research regarding the hormonal correlates of narcissism, despite the potential health implications. This study examined the role of participant narcissism and sex on basal cortisol concentrations in an undergraduate population. METHODS AND FINDINGS Participants were 106 undergraduate s...

Chunking, an experience based-learning mechanism, improves Soar's performance a great deal when viewed in terms of the number of subproblems required and the number of steps within a subproblem. This high-level view of the impact of chunking on performance is based on an deal computational model, which says that the time per step is constant. However, if the chunks created by chunking are expen...

Costly genetically engineered therapies, which threaten to cripple the health care industry economy and undermine the common good if applied indiscriminately, loom on the horizon. The spectrum of applicable candidates include moribund nursing home patients at the end of life. They will be fair game for therapy that will ultimately send them back to nursing homes to return later with the same co...

Robots operate in environments with varying implicit structure. For instance, a helicopter flying over terrain encounters a very different arrangement of obstacles than a robotic arm manipulating objects on a cluttered table top. State-of-the-art motion planning systems do not exploit this structure, thereby expending valuable planning effort searching for implausible solutions. We are interest...