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Recently, various 3-D talking heads have been applied to computer-aided language learning as a novel mode. However, there is a lack of objective evaluation of learners' perception of the talking head when learning Mandarin as a second language. This study used eye-tracking methodology to evaluate a multimodal 3-D Mandarin pronunciation tutor, in comparison with real human instructor. The pronunciation...
Apache Hive is a widely used data warehousing and analysis tool. Developers write SQL like HIVE queries, which are converted into MapReduce programs to runs on a cluster. Despite its popularity, there is little research on performance comparison and diagnose. Part of the reason is that instrumentation techniques used to monitor execution can not be applied to intermediate MapReduce code generated...
Cloud computing offers lots of attractive benefits to individuals and organizations. However, the adoption rate is a far cry from what it really deserves. Lack of well defined Service Level Agreement (SLA) is one of the key factors. This research aims to provide better understanding of the status quo of the current public cloud service level agreements and to recommend best practices. We conducted...
Location-Aware computing is one important field in ubiquitous computing. Location-Aware applications play an important role in many fields, especially mobile systems and navigation systems. Additionally, the new Internet of Things depends deeply on technologies in Location-Aware Computing. Based on our survey, it is difficult to locate accurately with GPS in a building because of positions in different...
Heart diseases are the serious health threats to human beings. Traditional cardiac monitoring systems are unsatisfactory to prevent the sudden death events caused by heart diseases. A pervasive cardiac monitoring system is thus developed, which can provide a real-time continuous cardiac care and arrhythmias detection service for any person at any time in any place. This paper gives a detailed description...
Taking advantage of measurements from an in situ monitoring program and an elastoplastic model using the finite-difference method, this paper simulates and evaluates the deformation and stability of a tunnel in soft argillaceous shale. The elastoplastic model is implemented in FLAC3D program to simulate the deformation and the stress of the soft argillaceous shale during construction. In situ tests...
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