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

a buffer, neighborhood boundary, or similar administrative overlay. Dasymetric mapping, which applies ancillary information (e.g., land use/cover data) to inform the areal estimation and interpolation of attributes such as population or housing units, is also suggested in the literature ( Holt et al. 2004 ; Mennis 2009 ). Although arguably superior for appraising demographic attributes ( Wu et al. 2005 ), it suffers from illogical stationarity when, for example, only one time stamp of ancillary

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Daniel Sutter and Somer Erickson

Administration (NOAA) weather radios and many public tornado siren systems will need to be upgraded, for instance, to warn residents based on the coordinates of the SBW polygon as opposed to counties. The value of the potential time savings documented here can be used to support making these ancillary investments. The magnitude of the potential time under warnings savings with SBW might seem surprising. To provide perspective, we compare the value of time under warnings with other costs of tornadoes

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

land use policy and crime in a shrinking city . Appl. Geogr. , 41 , 55 – 64 . Getis, A. , and Ord J. K. , 1992 : The analysis of spatial association by use of distance statistics . Geogr. Anal. , 24 , 189 – 206 . Griffith, L. J. , and Leonard S. D. , 1997 : Association of colors with warning signals . Int. J. Ind. Ergon. , 20 , 317 – 325 . Haimes, Y. Y. , 2009 : On the complex definition of risk: A systems-based approach . Risk Anal. , 29 , 1647 – 1654 . Hoekstra, S

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Richard W. Dixon and Todd W. Moore

the additional infrastructure and development, is likely to increase the vulnerability of this region to natural hazards such as tornadoes. This study assesses the spatial distribution of tornado vulnerability within Texas. The methodology used in this study to quantify the tornado vulnerability of Texas counties is adapted from Pielke and Pielke’s (1997) framework in which the vulnerability of a location to a particular hazard is a function of the societal exposure to and incidence of that

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Amber Silver and Jean Andrey

et al. 2007 ). Given that southern Ontario accounts for approximately 35% of Canada’s total population ( McGillivray 2010 ), the tornado hazard in this region poses a significant risk to millions of Canadians. b. Goderich, Ontario Goderich is a small town with a population of approximately 7500 residents located on the eastern shore of Lake Huron in the county of Huron, Ontario ( Fig. 1 ). The surrounding region is primarily agricultural, and the town spans a total land area of 7.91 km 2

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