Personal Technologies
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COSAR: hybrid reasoning for context-aware activity recognition
Personal Technologies - Tập 15 Số 3 - Trang 271-289 - 2011
Human activity recognition is a challenging problem for context-aware systems and applications. Research in this field has mainly adopted techniques based on supervised learning algorithms, but these systems suffer from scalability issues with respect to the number of considered activities and contextual data. In this paper, we propose a solution based on the use of ontologies and ontological reas......
BHE-AC: a blockchain-based high-efficiency access control framework for Internet of Things
Personal Technologies - Tập 26 - Trang 971-982 - 2021
In this information age, with the emergence of organizations, the number of various resources on the Internet of Things is also increasing. Generally, different users have different access permissions to different resources and most of the existing schemes have realized access control. But most of them are rough and not feasible in many organizations. Moreover, traditional access control schemes a......
Estimating ambient visibility in the presence of fog: a deep convolutional neural network approach
Personal Technologies - Tập 25 Số 1 - Trang 51-62 - 2021
Cross-community context management in Cooperating Smart Spaces
Personal Technologies - Tập 18 - Trang 427-443 - 2013
Recently, social networks have become the most prevalent IT paradigm, as the vast majority of Internet users maintain one or multiple social networking accounts. These accounts, irrespectively of the underlying service, contain rich information and data for the owner’s preferences, social skills, everyday activities, beliefs and interests. Along with these services, the computation, sensing and ne......
The interior spatial environment: dynamic 0g environments and human places
Personal Technologies - - 2011
A Context/Communication Information Agent
Personal Technologies - Tập 5 - Trang 78-81 - 2001
We are developing a Context/Communication Information Agent (CIA), an autonomous software agent that proactively searches for the right information at the right time. Our goal is to design and evaluate a system that leverages what people naturally do, using this knowledge to retrieve information, and presenting it with a minimal cost of disruption to the users. In this paper, we describe the resu......
Modelling group dynamics for crowd simulations
Personal Technologies - Tập 26 - Trang 1299-1319 - 2022
This paper investigates a new method to simulate pedestrian crowd movement in a large and complex virtual environment, representing a public space such as a shopping mall. To demonstrate pedestrian dynamics, we consider groups of pedestrians of different size, sharing a crowded environment. A pedestrian has its own characteristics, such as gender, age, position, velocity, and energy. The proposed ......
Mobility-aware routing in delay tolerant networks
Personal Technologies - Tập 19 - Trang 1111-1123 - 2015
Delay tolerant networks (DTNs) make use of opportunistic encounters of nodes for communication. The characteristics of high mobility of nodes, frequent link variation and long communication delays in DTNs result in an absence of an instantaneous end-to-end path from any source to a destination, making routing a challenge in DTNs. To deal with this issue, a lot of routing schemes have been proposed......
Pico-ing into the future of mobile projection and contexts
Personal Technologies - Tập 16 Số 1 - Trang 39-52 - 2012
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