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Content caching in small base stations or wireless infostations is considered to be a suitable approach to improve the efficiency in wireless content delivery. Placing the optimal content into local caches is crucial due to storage limitations, but it requires knowledge about the content popularity distribution, which is often not available in advance. Moreover, local content popularity is subject...
This paper presents the outcome of a preliminary investigation into the use of mobile apps as a dynamic capability tool by start-up entrepreneurs. 19 business start-ups in Lagos Nigeria were involved in this study, with average enterprise age of 11.5 months in service industry. After strategic use of customized mobile app for 12 weeks, it was observed that average profit, customer-base and staffing...
Crowdsourcing is widely used in mobile network quality data collection since it can derive huge amounts of data. Although the results of crowdsourcing measurement strongly depend on the monitor user population, requirements for monitor users in crowdsourcing measurement have not been fully considered. For this study, we analyzed the relationship between user attributes and measured QoE through crowdsourcing...
Information technology is often used as means to some more fundamental ends. Such use is often adaptive rather than planned or habitual and, therefore, alien to the dominant IT use models. In this paper, we argue that the role, which IT plays, should be taken into account when trying to predict IT use. We re-evaluate previously reported data on mobile ticket use and demonstrate that, when IT use is...
Mobile technology can improve lives of older adults through remote health monitoring (telehealth), memory aids (including medicine reminders), personal data management, and social and communication assistance. Although numerous design guidelines, design principles, and heuristics have been developed to improve the user interface (UI) design of mobile applications for older adults, many usability problems...
The extraction of macroscopic mobile context reflecting users' personal and social behavior patterns from smartphone sensor data (e.g., GPS/Bluetooth signals) is crucial in building intelligent pervasive systems. Hierarchical Dirichlet Processes (HDP), a well known Bayesian nonparametrics model for grouped data, is a promising option to achieve this objective due to its ability of discovering high-level...
Health threats, such as HIV/AIDS, maternal health and SARS, are global in nature, as their impact goes beyond the borders of any one nation. This has compelled a global approach to combating these threats, commonly by multinational partnerships among many different types of institutions. Although diffusion of mobile technology in the developing world has been successful, and personal health records...
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