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We present a model of network formation where entering nodes find other nodes to link to both completely at random and through search of the neighborhoods of these randomly met nodes. We show that this model exhibits the full spectrum of features that have been found to characterize large socially generated networks. Moreover, we derive the distribution of(More)
Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this(More)
INTRODUCTION The Chief Medical Officer's 2008 annual report highlighted the importance of simulation in medical training. Simulator development has focused on increasing authenticity and fidelity. Development has not necessarily been guided by evidence for educational improvement. On reviewing 34 years of literature, Issenberg et al identified ten features(More)
—Civilian and military networks are continually probed for vulnerabilities. Cyber criminals, and autonomous botnets under their control, regularly scan networks in search of vulnerable systems to co-opt. Military and more sophisticated adversaries may also scan and map networks as part of reconnaissance and intelligence gathering. This paper focuses on(More)
In recent years, heightened security concerns have prompted increased interest in radiation portal monitors, instruments capable of detecting, and in some cases identifying, gamma-ray and neutron-emitting radioactive material passing through them. Along with efficient and reliable physical detectors, such monitors need software capable of analyzing the(More)
The editorial team of Digestive Diseases and Sciences (DDS) wishes to acknowledge the critically important role played by the individuals whose names appear in the following list of reviewers for calendar year 2008. Manuscript reviews by these clinical and research scientists, as well as by members of the editorial board, are the cornerstone of the journal(More)
Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this(More)
The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of(More)