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Kevin M. Simmons and Daniel Sutter

exploit considerable differences in FAR to detect a possible influence of false alarms. 3. False-alarm variable definitions Theory tells us that warning performance should affect subjective estimates of warning quality, but theory does not inform us of exactly how residents form their perceptions. Also, our data points are tornado events. The warning issued for a tornado (if any) thus can be naturally included as a control variable for the individual tornado. But false alarms are nonevents and

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Walker S. Ashley, Stephen Strader, Troy Rosencrants, and Andrew J. Krmenec

calculate the spatiotemporal changes in exposure consequences to potential violent tornadoes across the Chicago region to discover how the disaster landscape has evolved across time and differing development settings. a. Comparison of path attributes The areal extent of tornado damage is controlled by basic length and width dimensions of the hazard, whereas the damage magnitude is related to tornado core wind speed and modulated by construction practices, the age and quality of structures affected, the

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S. Hoekstra, K. Klockow, R. Riley, J. Brotzge, H. Brooks, and S. Erickson

would contextualize the reliability of our results. c. Data analysis and quality control Simple descriptive statistics such as response rates, average or median responses, and difference testing were used to analyze the data. A handful of surveys were returned incomplete. Thus, the sample size changed from question to question, depending on which questions were skipped. The free response questions addressing the public’s actions and behaviors when given a 15-min versus 1-h lead time were the

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Alan W. Black and Walker S. Ashley

Disease Control’s (CDC’s) electronic record of death identification. Ashley and Mote (2005) note that fatalities due to derecho events may receive less media attention than large-impact events such as floods, tornadoes, or hurricanes, and it is hypothesized that nontornadic convective wind fatalities may be underreported in Storm Data. Despite issues with Storm Data, it remains the primary source for weather-related fatality information. Similar to other recent atmospheric hazard fatality

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Kevin D. Ash, Ronald L. Schumann III, and Gregg C. Bowser

influence the ability to compare and contrast values assigned to the units. Gestalt principles suggest that similarity, proximity, common fate (i.e., equivalent attribute or value), and continuity of visual features influence how visual representations are interpreted as a whole. Magnitude, which assists organization of features into a hierarchy, may be represented as absolute or relative depending upon the data and purpose of the graphic. Coordinate systems also aid in visual organization, and they may

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