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• We appreciate the generous support of the National Science Foundation (IOC Award #0323176), the Stanford Technology Ventures Program, and the MIT Sloan School of Management. We also thank multiple individuals for their helpful comments, including Using computational and mathematical modeling, this study explores the tension between too little and too much(More)
Text retrieval systems are used to fetch documents from large text collections, using queries consisting of words and word sequences. A shortcoming of current systems is that word-sequence queries, also known as phrase queries, can be expensive to evaluate, particularly if they include common words. Another limitation is that some forms of querying are not(More)
  • Richard R Zwaal, Julie Ahringer, Henri G.A.M van Luenen, Alice Rushforth, Phil Anderson, Ronald H.A Plasterk
  • 1996
Heterotrimeric G proteins are signal-transducing molecules activated by seven transmembrane domain receptors. In C. elegans, gpb-1 encodes the sole Gbeta subunit; therefore, its inactivation should affect all heterotrimeric G protein signaling. When maternal but no zygotic gpb-1 protein (GPB-1) is present, development proceeds until the first larval stage,(More)
We examine the contagion processes whereby practices originating in one organizational population spread into and diffuse within a second. We theorize that " endemic " innovations native to one population spread to other populations through two distinct forms of contagion. We test this argument by observing information technology firms' adoption of(More)
BACKGROUND In Australia, many community service program data collections developed over the last decade, including several for aged care programs, contain a statistical linkage key (SLK) to enable derivation of client-level data. In addition, a common SLK is now used in many collections to facilitate the statistical examination of cross-program use. In(More)
We provide an overview of the Themis system, a commercial implementation of a digital library of legislation. !l'hemis uses SGML to store legislation. This allows a single source document to be exported in a number of different formats and presentations. Themis also allows access to different versions of legislation by specifying a point-in-time at which(More)
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