Uncertainty or errors are introduced in fluid flow data as the data is acquired, transformed and rendered. Although researchers are aware of these uncertainties, little has been done to incorporate them in the existing visualization systems for fluid flow. In the absence of integrated presentation of data and its associated uncertainty, the analysis of the visualization is incomplete at best and may lead to inaccurate or incorrect conclusions. This work presents UFLOW -a system for visualizing uncertainty in fluid flow. Although there are several sources of uncertainties in fluid flow data, in this work, we focus on uncertainty arising from the use of different numerical algorithms for computing particle traces in a fluid flow. The techniques that we have employed to visualize uncertainty in fluid flow include uncertainty glyphs, flow envelopes, animations, priority sequences, twirling batons of trace viewpoints, and rakes. These techniques are effective in making the users aware of the effects of different integration methods and their sensitivity especially near critical points in the flow field.

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In his book Reveille for Radicals, Saul Alinsky writes, "Most people are eagerly groping for . . . some way in which they can bridge the gap between their morals and their practices" (p. 94). Today, many consumers try to bridge that gap by participating in what has been termed ethical consumption: the intentional purchase of products and services that the customer considers to be ethically produced. But what happens if consumer perceptions do not match reality? This study investigates one aspect of ethical consumption by examining consumer perceptions of the term cruelty free. Various definitions of this term exist, and companies can (and do) use the term when the product or its ingredients were indeed tested on animals. This exploratory study suggests that many consumers use this term as a moral heuristic in decision-making. As a result, the use of the term creates a halo effect that elevates brand perceptions. When provided with information suggesting the heuristic is flawed, consumers slightly alter perceptions but attitudes remain relatively strong. While some countries have implemented regulation regarding the use of the phrase in some contexts, results suggest that a broader policy is necessary to correct misperceptions and avoid misleading consumers.

Hard copies of monographs and back issues (Volume 1, Issue 1 through Volume 8, Issue 3) are available for purchase. Prices and ordering information can be found at http://www. uchsc.edu/ai/ncaianmhr/journal/pdf_fi les/Journal_Order_Form.pdf. American Indian/Alaska Native (AI/AN) populations are affl icted disproportionately with a number of chronic illnesses (Indian Health Service [IHS], 2001). Specifi cally, the rates of Type 2 Diabetes, alcohol abuse, and suicide have consistently been higher in these populations for many years (IHS). To date the majority of research has focused on these three disorders alone or in dyads; little attention has been given to the co-occurrence of all three simultaneously in AI/AN populations. The Behavioral Risk Factor Surveillance System (BRFSS) provides annual data on estimates of risk factors and health-related behavior in state populations across the nation. This article reports an analysis of the prevalence and correlates of diabetes and associated risk factors for depression and alcohol abuse in AI/AN adults sampled in the fi fty states as part of the 2003 BRFSS survey.

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