1. Ilyas Uyanik 1, Panagiotis Tsiamyrtzis 3, Daniel Price 2, Ioannis Pavlidis 1 1 Computational Physiology Laboratory, University of Houston, 2 Honors College, University of Houston 3 Department of Statistics, Athens University of Business and Economics Interfacing Real-Time Ozone Information

2. 2 Introduction Ozone is formed in the air through a complex series of reactions involving light and chemical precursors. High levels of ozone are harmful to health and the result of pollution under certain environmental conditions. The American Lung Association currently ranks Houston #7 among most ozone-polluted cities.  Introduction  App-Design  Survey  Discussions

3. 3 Until recently only a categorical qualitative description was possible for metropolitan areas. With the proliferation of environmental sensor networks, real-time quantitative and localized ozone information has become available. OzoneMap app: Evolution of ‘ozone clouds’ in the Houston area for the past two hours. Visualization conundrum for designers and users.  Introduction  App-Design  Survey  Discussions

4. 4 App Design  Introduction  App-Design  Survey  Discussions

5. 5 Survey of Potential Users  Introduction  App-Design  Survey  Discussions A total of 51 participants (31 males and 20 females) volunteered for this user study. The participants were asked to view two videos and then answer a set of questions.  Q1: Rate the temperature style representation of the evolving ozone data. 1= Poor ; 2= Fair ; 3= Good ; 4= Very Good ; 5= Excellent  Q2: Rate the radar style representation of the evolving ozone data. 1= Poor ; 2= Fair ; 3= Good ; 4= Very Good ; 5= Excellent  Q3:Do you consult weather predictions over your smartphone and/or the Internet? 1= Never ; 2= Rarely ; 3= Sometimes ; 4= Often ; 5= Very Often  Q4: Do you consult pollutant predictions over your smartphone and/or the Internet? 1= Never ; 2= Rarely ; 3= Sometimes ; 4= Often ; 5= Very Often  Q5: Do you walk or run outdoors in a metropolitan area? 1= Never ; 2= Rarely ; 3= Sometimes ; 4= Often ; 5= Very Often  Q6: Gender / Q7: Age / Q8: Education Level

6. 6 Survey Analysis  Introduction  App-Design  Survey  Discussions Poor Fair Good Very Good Excellent The non-parametric Wilcoxon test indicated no significant differences between the medians of the two distributions (p=0.2311 > 0.05). Counts 25 20 15 10 5 0 The result of the first two questions

7. 7 Discussions  Introduction  App-Design  Survey  Discussions An impasse resulted in a compromise, where both options are offered in the Settings, leaving the choice to the users. A famous historical case is the continued adoption of left-side driving by Britons - a leftover from the horse riding days, where left-side riding accommodated sword handling in moments of danger. The case we report here is a historical deja vu at a small scale, evolving in front of our eyes, which provides the opportunity for and in-depth study and intervention.

8. Thank You