For many navigated surgical procedures, the precise registration of preoperative data sets with bones of the patient is an important requisite. Conventional navigation systems use paired point registration based on anatomical landmarks or fiducial markers. This approach increases the invasiveness, since landmarks must be exposed and fiducial markers must be connected to the bone. Intraoperative...

The Soil and Water Assessment Tool (SWAT) hydrological/water quality model divides a watershed into hydrological response units (HRUs) based on unique land cover, soil type, and slope. HRUs are a set of discontinuous land masses that are spatially located in the watershed but their responses are not tied to any particular field. Field_SWAT, a simple graphical user interface (GUI)-driven tool, w...

The 1990 Children’s Television Act (CTA) requires broadcasters to provide educational and informational television programs for children. A multimethod, multidisciplinary approach, utilizing both cross-sectional and longitudinal designs, was used to investigate the degree to which the CTA has had an effect on children’s viewing experiences and learning. Secondto sixth-grade children’s preferenc...

This paper presents details of a web-based, database-oriented ‘‘electronic voting service’’. Rapid world-wide growth in Internet and Web use has stimulated many initiatives aimed at applying information and communication innovations to create what has been called a ‘‘digital’’ or ‘‘electronic democracy’’. Internet voting is already widespread in a variety of forms, some serious, most not. A new...

(1999); and Dundee, Scotland (1999). The conference chair was Fausto Giunchiglia, University of Trento. The program chairs were Patrick Blackburn, INRIA Lorraine; Chiara Ghidini, the Centre for Scientific and Technological Research in Trento; and Roy Turner, University of Maine. There were 77 submissions, from which 31 papers and 14 posters were selected. One of the aims of the CONTEXT conferen...

We investigated the foraging behavior of the mud snail, Ilyanassa obsoleta, and its consequences for macrobenthic community structure on mud flats on Long Island, NY, USA. Field sampling demonstrated strong spatial heterogeneity in the population densities of I. obsoleta. We experimentally tested three hypotheses: (i) I. obsoleta are strongly attracted to areas with high levels of detritus; (ii...

Loess grain size data used to infer transport direction or wind strength are generally derived from vigorously disaggregated samples. However, these data may not adequately represent the effective particle size distribution during loess transport, if the transported dust contained aggregates of finegrained material. Thin sections of minimally altered C and BC horizons in the late Pleistocene Pe...

PURPOSE The purpose of this study was to examine whether white blood cell (WBC) level mediated the relationship between physical activity and prostate-specific antigen (PSA) levels. METHOD Data from the 2003-2006 National Health and Nutrition Examination Survey were used; 1,726 U.S. adult men (aged 40 years or older) provided complete data on the study variables. Participants wore an ActiGrap...

Feature-based methods for non-rigid registration frequently encounter the correspondence problem. Regardless of whether points, lines, curves or surface parameterizations are used, feature-based non-rigid matching requires us to automatically solve for correspondences between two sets of features. In addition, there could be many features in either set that have no counterparts in the other. Th...