John P. Rula, Vishnu Navda, F. Bustamante, Ranjita Bhagwan, S. Guha
{"title":"No \"one-size fits all\": towards a principled approach for incentives in mobile crowdsourcing","authors":"John P. Rula, Vishnu Navda, F. Bustamante, Ranjita Bhagwan, S. Guha","doi":"10.1145/2565585.2565603","DOIUrl":"https://doi.org/10.1145/2565585.2565603","url":null,"abstract":"We are becoming increasingly aware that the effectiveness of mobile crowdsourcing systems critically depends on the whims of their human participants, impacting everything from participant engagement to their compliance with the crowdsourced tasks. In response, a number of such systems have started to incorporate different incentive features aimed at a wide range of goals that span from improving participation levels, to extending the systems' coverage, and enhancing the quality of the collected data. Despite the many related efforts, the inclusion of incentives in crowdsourced systems has so far been mostly ad-hoc, treating incentives as a wild-card response fitted for any occasion and goal. Using data from a large, 2-day experiment with 96 participants at a corporate conference, we present an analysis of the impact of two incentive structures on the recruitment, compliance and user effort of a basic mobile crowdsourced service. We build on these preliminary results to argue for a principled approach for selecting incentive and incentive structures to match the variety of requirements of mobile crowdsourcing applications and discuss key issues in working toward that goal.","PeriodicalId":360291,"journal":{"name":"Proceedings of the 15th Workshop on Mobile Computing Systems and Applications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117154017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reducing energy consumption of smartphones using user-perceived response time analysis","authors":"Wook Song, Nosub Sung, Byung-Gon Chun, Jihong Kim","doi":"10.1145/2565585.2565595","DOIUrl":"https://doi.org/10.1145/2565585.2565595","url":null,"abstract":"We propose a novel power optimization framework based on user-perceived response time analysis. Unlike most existing power optimization approaches, our framework takes explicit account of the quality of user experience into applying low-power techniques. We divide an execution of a given user-interactive session into two intervals, one where the system response time directly affects user experience and the other where the system response time does not affect user experience. For the user-oblivious response time interval, our framework allows more aggressive applications of low-power techniques for a higher energy efficiency. In order to identify the user-perceived response time of smartphone applications during run time, we developed an on-line user-perceived response time analyzer (ura) for Android-based smartphones. Based on the analysis result of ura, our proposed power optimization framework employs more aggressive low-power techniques in the user-oblivious interval. Our experimental results on a smartphone development board show that the proposed technique can reduce the CPU energy consumption by up to 65.6% over the Android's default ondemand cpufreq governor.","PeriodicalId":360291,"journal":{"name":"Proceedings of the 15th Workshop on Mobile Computing Systems and Applications","volume":"33 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128732370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings of the 15th Workshop on Mobile Computing Systems and Applications","authors":"","doi":"10.1145/2565585","DOIUrl":"https://doi.org/10.1145/2565585","url":null,"abstract":"","PeriodicalId":360291,"journal":{"name":"Proceedings of the 15th Workshop on Mobile Computing Systems and Applications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121416459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}