David Kirschner

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The San Andreas Fault Observatory at Depth (SAFOD) drill hole encountered indurated, high-seismic-velocity arkosic sedimentary rocks west of the active trace of the San Andreas fault in central California. The arkosic rocks are juxtaposed against granitic rocks of the Salinian block to the southwest and against fi ne-grained Great Valley Group and Jurassic(More)
BACKGROUND The Focused Assessment with Sonography for Trauma (FAST) examination has become a valuable tool in trauma resuscitation. Despite the widespread use of FAST training among traumatologists, no evidence-based guidelines exist to support optimal training requirements or to provide quantitative objective assessments of imaging capabilities. Both(More)
In this paper we attempt to unpack the meanings of “expert” and “novice” in games research. A literature review reveals unreliable definitions and inadequate operationalization of these concepts. Nonetheless, researchers default to recruiting experienced players for games research projects to the exclusion of novices. We take an interactionist approach to(More)
BACKGROUND Point-of-care ultrasonography is a standard part of trauma assessments, but there are no objective tools to assess proficiency and ensure high-quality examinations. Hand motion analysis (HMA) has been validated as a measure of surgical skill but has not previously been applied to ultrasonography. HMA was assessed for construct validity in Focused(More)
Cyberworlds fuel innovations in development and design, but whether and how to catalyze a slow-moving interplay among them remains an open question. This paper develops an argument for organizing interdisciplinary research through and around cyberworlds in order to bridge design and development by means of a collaboratory. To this end, it provides(More)
In this paper we articulate an empirical approach to the study of social action in digitallymediated contexts. Our approach extends Carl Couch’s theory of cooperative action, which is based on a set of “elements of sociation”: acknowledged attentiveness, mutual responsiveness, congruent functional identities, shared focus, and social objective. Three(More)
1 An enforcement policy statement describes the Commission’s future enforcement plans, goals, and objectives with respect to a particular industry or practice. Enforcement policy statements do not have the force or effect of law, but they may reflect the Commission’s interpretation of a legal requirement. 2 75 FR 62,389 (Oct. 8, 2010). E. Kirschner(More)
The last few decades have seen multiple reevaluations of our understanding of this fundamental process we call learning. Situated cognition theory lies at the crossroads of multiple disciplines. In this paper, the influence of the social sciences on an understanding of learning is reviewed as well as the implications for two contemporary learning(More)
G. Agakishiev, A. Balanda, R. Bassini, D. Belver, A.V. Belyaev, A. Blanco, M. Böhmer, J. L. Boyard, P. Braun-Munzinger, P. Cabanelas, E. Castro, S. Chernenko, T. Christ, M. Destefanis, J. Dı́az, F. Dohrmann, A. Dybczak, T. Eberl, L. Fabbietti, O. V. Fateev, P. Finocchiaro, P. Fonte, J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzón, R. Gernhäuser, A. Gil,(More)
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