This study explored how men who have sex with men (MSM) communicated their use of pre-exposure prophylaxis (PrEP) on smartphone applications. Informed by the theory of problematic integration and ...uncertainty management, we asked if revealing 'HIV negative, on PrEP' status on smartphone applications might increase one's uncertainty in communicating about safe sex with others. We conducted interviews with 31 Taiwanese MSM currently taking PrEP who participated in a national demonstration project. We identified three types of PrEP-related uncertainty: condition, information, and stigma uncertainty. Applied implications of our findings indicate the importance of the feasibility of medical infrastructure in implementing PrEP, the complication in translating scientific and medical jargon into everyday language, and dynamics of negotiating stigmas associated with HIV and AIDS in the context of HIV prevention.
What happened during the Boston Marathon in 2013? Nowadays, at any major event, lots of people take videos and share them on social media. To fully understand exactly what happened in these major ...events, researchers and analysts often have to examine thousands of these videos manually. To reduce this manual effort, we present an investigative system that automatically synchronizes these videos to a global timeline and localizes them on a map. In addition to alignment in time and space, our system combines various functions for analysis, including gunshot detection, crowd size estimation, 3D reconstruction and person tracking. To our best knowledge, this is the first time a unified framework has been built for comprehensive event reconstruction for social media videos.
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