175 research outputs found

    IoT-Enabled Community Care for Ageing-in-Place: The Singapore Experience

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    The paradigm of ageing-in-place - where the elderly live and age in their own homes, independently and safely, with care provided by the community - is compelling, especially in societies that face both shortages in institutionalized eldercare resources, and rapidly ageing populations. When the number of elderly who live alone rises rapidly, support and care from their communities become increasing crucial. Internet of Things (IoT) technologies. They can become the fundamental enabler for smart community eldercare. In this presentation, I would like to share our experiences and learnings gathered from large-scale deployments of IoT systems in in-home and community spaces that elderly living alone interact with, focusing on the key insights as well as operational and usability aspects of such systems

    Massive open online networks for urban sensing: Design, deployment and challenges

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    Prediction of nocturia in live alone elderly using unobtrusive in-home sensors

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    iCity Lab; SHINESeniors; National Research Foundation (NRF) Singapore under the Land and Livability National Innovation Challenge (L2NIC

    Policy Design, Planning, and Management in Global Systems Science

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    Policy Design is defined to be a new area of inquiry that takes the methods of design into the world of social, economic and environmental policy. Policy exists at many levels and it is increasingly recognized that policies applied to one system may impact on policies applied to other systems. The European Commission suggest a ‘science of global systems’ to improve the way that science can help inform policy and societal responses to global challenges such as climate change, global financial crises, global pandemics, city growth and migration patterns. The new science requires radically novel ideas and thinking to embed scientific evidence into the policy and societal processes. It is here argued that Policy Design in the context of planning and management is an essential part of the methodology of Global System Science

    Objective sleep quality as a predictor of mild cognitive impairment in seniors living alone

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    National Research Foundation (NRF) Singapore - Ministry of Health HealthCare Research Scholarshi

    Machine Learning in Wireless Sensor Networks: Algorithms, Strategies, and Applications

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    Wireless sensor networks monitor dynamic environments that change rapidly over time. This dynamic behavior is either caused by external factors or initiated by the system designers themselves. To adapt to such conditions, sensor networks often adopt machine learning techniques to eliminate the need for unnecessary redesign. Machine learning also inspires many practical solutions that maximize resource utilization and prolong the lifespan of the network. In this paper, we present an extensive literature review over the period 2002-2013 of machine learning methods that were used to address common issues in wireless sensor networks (WSNs). The advantages and disadvantages of each proposed algorithm are evaluated against the corresponding problem. We also provide a comparative guide to aid WSN designers in developing suitable machine learning solutions for their specific application challenges.Comment: Accepted for publication in IEEE Communications Surveys and Tutorial

    Rate-distortion Balanced Data Compression for Wireless Sensor Networks

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    This paper presents a data compression algorithm with error bound guarantee for wireless sensor networks (WSNs) using compressing neural networks. The proposed algorithm minimizes data congestion and reduces energy consumption by exploring spatio-temporal correlations among data samples. The adaptive rate-distortion feature balances the compressed data size (data rate) with the required error bound guarantee (distortion level). This compression relieves the strain on energy and bandwidth resources while collecting WSN data within tolerable error margins, thereby increasing the scale of WSNs. The algorithm is evaluated using real-world datasets and compared with conventional methods for temporal and spatial data compression. The experimental validation reveals that the proposed algorithm outperforms several existing WSN data compression methods in terms of compression efficiency and signal reconstruction. Moreover, an energy analysis shows that compressing the data can reduce the energy expenditure, and hence expand the service lifespan by several folds.Comment: arXiv admin note: text overlap with arXiv:1408.294

    Toward a Robust Sparse Data Representation for Wireless Sensor Networks

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    Compressive sensing has been successfully used for optimized operations in wireless sensor networks. However, raw data collected by sensors may be neither originally sparse nor easily transformed into a sparse data representation. This paper addresses the problem of transforming source data collected by sensor nodes into a sparse representation with a few nonzero elements. Our contributions that address three major issues include: 1) an effective method that extracts population sparsity of the data, 2) a sparsity ratio guarantee scheme, and 3) a customized learning algorithm of the sparsifying dictionary. We introduce an unsupervised neural network to extract an intrinsic sparse coding of the data. The sparse codes are generated at the activation of the hidden layer using a sparsity nomination constraint and a shrinking mechanism. Our analysis using real data samples shows that the proposed method outperforms conventional sparsity-inducing methods.Comment: 8 page
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