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Wireless Sensor Networks (WSNs) allow applications to interact with the physical world using sensing nodes deployed in an Internet of Things (IoT). Many WSN sensing nodes have constrained computing and memory capabilities. This paper details a new cache algorithm suitable for use on constrained nodes and its use in an architecture incorporating caching and the flow of data from sensors to services,...
Internet of Things devices are driven by applications. To stimulate innovation on their platforms, manufacturers of embedded products are creating software ecosystems that enable third-parties develop applications for their devices. Since such applications are developed externally, their seamless integration into the platforms is a challenge. In this paper, we propose to use semantic reasoning to...
The Web of Things (WoT) extends the Internet of Things (IoT) considering that each physical object can be accessed and controlled using Web-based languages and protocols. However, due to the mobility of physical objects and to the short radio range of the wireless interfaces they are equipped with, frequent and unpredictable connectivity disruptions may occur between the physical objects and the Web...
Scheduling resources in Cloud distributed videoconferencing systems presents a complex challenge not resolved yet. Traditional scheduling models are not applicable due to the particular characteristics of such type of systems. One of the main issues is estimating how many resources will consume a new client that connects to a videoconferencing session. Otherwise, it is difficult to decide where to...
Cloud computing is part of a highly dynamic market with heterogeneous resource providers and varying consumers needs. This influences the provisioning process for highly scalable Software-as-a-service (SaaS) applications, which depends on both resource providers and consumer needs. Indeed, for scaling purposes, SaaS providers need to rent Virtual Machines (VMs) from Infrastructure-as-a-Service (IaaS)...
We present a system, called Cygnet, that makes it easy both to use and to implement media-rich interactive cloud services. Usage simplicity is achieved by providing a simple but powerful mechanism that makes an I/O device a first-class network-accessible resource that any user can dynamically "bind" to any service at any time. Implementation simplicity is achieved by providing a development...
Collaborative downloading of contents from the Internet in VANETs has become a hot research topic. In traditional schemes, most of the vehicles are interested in the same content which is splitted in multiple chunks that are collaboratively downloaded by the nodes and finally delivered to the rest of vehicles over a peer-to-peer network. This paper proposes a collaborative downloading scheme for VANETs...
We describe an approach for developing a campus-wide sensor network using commodity single board computers. We sketch various use cases for environmental sensor data, for different university stakeholders. Our key premise is that supersensors -- sensors with significant compute capability -- enable more flexible data collection, processing and reaction. In this paper, we describe the initial prototype...
Cloud computing allows access to computing resources from a number of providers, who offer multiple pricing strategies for selected product characteristics. The service offerings are becoming increasingly complex, with innovations such as spot markets making service selection more difficult. This paper utilizes a task-oriented approach to examine user requirements expressed as ontology to map requirements...
This paper contains theoretical foundations and practical insights for reasonable penetration of cloud computing technologies into modern business architectures. Its main novelty is that the strategic alignment model is considered from the cloud vendors' perspective. We discover the extent of cloud penetration into the company's business processes and give practical recommendations on choosing the...
A privacy-preserving aggregation scheme based on the designed erasable data-hiding technique was proposed for sensor networks. With this technique, each sensory data item could be hidden by the sensor node which collects it without data exchange, then, the hidden data is reported to the cluster head, and finally, the aggregation result can be recovered from the hidden data in the cluster head which...
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