Much of the GSS literature comparing GSS groups with manual groups has produced contrarian results. One of the more confusing is that GSS groups have a higher level of non-consensus than manual groups. Lack of consensus in GSS groups is considered to be a negative aspect of GSS. This paper argues that non-consensus is not necessarily harmful, and proposes an alternative interpretation of non-co...

We present a collection of heuristics and simple tests for evaluating the quality of a projection-based virtual reality display. A typical VR system includes numerous potential sources of error. By understanding the characteristics of a correctly working system, and the types of errors that are likely to occur, users can quickly determine if their display is inaccurate and what components may n...

In this paper, we empirically test for the influence of fairness considerations on the willingness to redistribute income in private and in democratic decisions. In contrast to standard explanations of income redistribution, our theory takes into account that prices shift decisively as we move from the sphere of private contributions to politics. At the polls, it is nearly costless to observe s...

BACKGROUND Effectively reducing cardiovascular disease disparities requires identifying and reducing disparities in risk factors. Improved understanding of hypertension disparities is critical. METHODS Cross-sectional analysis of nationally representative samples of black and white adults 20 years and older who participated in the National Health and Nutrition Examination Survey (NHANES) 1999...

How many imputations are sufficient in multiple imputations? The answer given by different researchers varies from as few as 2 - 3 to as many as hundreds. Perhaps no single number of imputations would fit all situations. In this study, η, the minimally sufficient number of imputations, was determined based on the relationship between m, the number of imputations, and ω, the standard error of im...

Much of the orthodontic treatment undertaken throughout the world, and particularly in the United States, is aimed at correcting dentoalveolar and skeletal malrelationships. With the current level of fixed appliance refinement, we have become quite adept at achieving excellent occlusions. However we often do not consider one important fact when designing our treatment regime: the craniofacial c...

PURPOSE Staphylococcus aureus is a common cause of invasive infections, yet most assessments of prevalence are based on health care-based samples. We computed population-based estimates of nasal carriage of S aureus and risk factors for carriage, as well as population-based estimates of nasal carriage of methicillin-resistant S aureus (MRSA). METHODS We used the National Health and Nutrition ...

PC graphics technology, primarily driven by the video gaming industry, is becoming a possibility for the development of advanced virtual reality environments. The graphics and computational power required for virtual environments has been previously available exclusively on highend computing systems. Clustering multiple PCs to develop multi-processor multi-graphics systems capable of running an...

The belief that patients seen in hospital outpatient departments are sicker than those patients seen by private practice physicians is examined in this article. A large scale data set developed by Robert Mendenhall at the University of Southern California and modeled on the National Ambulatory Medical Care Survey (NAMCS) is used for secondary analysis. Differences in case-mix complexity were fo...

Case Studies Analysis of the experience of land parcels partially taken for high­ way right-of-way ordinarily involves investigation of individual takings — the case study approach. For example, Figure 1 shows what happened from a period before the highway went through a property until a part of the remainder is sold. When this happens, when any part of the remainder is sold, it becomes possibl...