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Traffic speed is a key indicator for the efficiency of an urban transportation system. Accurate modeling of the spatiotemporally varying traffic speed thus plays a crucial role in urban planning and development. This paper addresses the problem of efficient fine-grained traffic speed prediction using big traffic data obtained from static sensors. Gaussian processes (GPs) have been previously used...
The proliferation of wireless technologies in today's everyday life is one of the key drivers of the Internet of Things (IoT). In addition to being an enabler of connectivity, the vast penetration of wireless devices today gives rise to a secondary functionality as a means of tracking and localization of the devices themselves. Indeed, in order to discover and automatically connect to known Wi-Fi...
In this paper, we analyze the network of expertise constructed from the interactions of users on the online question-answering (QA) community of Stack Overflow. This community was built with the intention of helping users with their programming tasks and, thus, questions are expected to be highly factual. This also indicates that the answers one provides may be highly indicative of one's level of...
As the Singapore's population ages rapidly, the number of geriatric inpatients in Singapore is expected to rise significantly. This will certainly exert greater pressures on the efficient management of hospital resources. Hospital length of stay (LOS) is an important indicator of hospital activity and management because of its direct relation to resource consumption. Planning of hospital resources...
The Knowledge File System (KFS) is a smart virtual file system that sits between the operating system and the file system. Its primary functionality is to automatically organize files in a transparent and seamless manner so as to facilitate easy retrieval. Think of the KFS as a personal assistant, who can file every one of you documents into multiple appropriate folders, so that when it comes time...
Hospital length of stay (LOS) is a widely accepted indicator of hospital activity and performance of clinical care. We have collected and analyzed data on LOS of 4,086 stroke patients discharged from the Singapore General Hospital (SGH) for the duration 2004-2007. We chose to study stroke patients' data because stroke is an important chronic disease which requires significant social support and healthcare...
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