Papers by Orfefs Voutyras
Future Gener. Comput. Syst., 2020
In aiming to create added intelligence for Things interfacing with IoT principles in the form of ... more In aiming to create added intelligence for Things interfacing with IoT principles in the form of Services, Smart Heating Management is consistently a field of promising research. In the currently demonstrated work, an approach will be described for an operational software framework of modular components that can create intelligence in Housing Units as those presented in our scenario. The framework is based on the lightweight Case Based Reasoning approach and principles in order to describe the Problem and Solution of heating management, as well as to extract knowledge from generic historical data. Collaboration between houses is included through the sharing of anonymized high level problem-solution data, as an instantiation of the same social learning principles that govern human behavior and enable Knowledge diffusion. The approach is validated through historical data acquired in two time periods from the Camden (London) community residencies and demonstrates an average of 22% savi...
Location-based services are becoming extremely popular due to the widespread use of smartphones a... more Location-based services are becoming extremely popular due to the widespread use of smartphones and other mobile and portable devices. These services mainly rely on the sincerity of users, who can spoof the location they report to them. For applications with higher security requirements, the user should be unable to report a location different than the real one. Proof of Location protocols provide a solution to secure localization by validating the device’s location with the help of nearby nodes. We propose QuietPlace, a novel protocol that is based on ultrasound and provides strong identities, proving the location of the owner of a device, without exposing though their identity. QuietPlace provides unforgeable proof that is able to resist to various attacks while respecting the users’ privacy. It can work regardless of certificate authority and location-based service and is able to support trust schemas that evaluate the participants’ behavior. We implement and validate the protoco...
One of the most regular activities of amateur clubs is scientific outreach, a paramount channel t... more One of the most regular activities of amateur clubs is scientific outreach, a paramount channel to disseminate scientific results. It is typically performed through talks given by both experts (professional astronomers) and non-experts to a diverse audience, including amateur astronomers. However, this is a rather passive, one-way, approach. The advance of technology has provided all the tools that can help the audience/amateurs to become more active in the scientific output. What is often missing is the proper guidance. To address that within the Greek amateur community the Hellenic Amateur Astronomy Association materialized a training program (free-of-charge and open-accessed) to develop scientific thought and the practical capabilities for amateurs to produce valuable results. The program ran from November 2014 to May 2015 focusing each session (month) to: the Sun, variable stars, comets, planets, artificial satellites, meteors. A professional and/or an experienced amateur astron...
Computers
In this paper, we demonstrate the multiple points of innovation when combining blockchain technol... more In this paper, we demonstrate the multiple points of innovation when combining blockchain technology with Internet of Things (IoT) and security frameworks. The deployment and use of IoT device networks in smart city environments has produced an enormous amount of data. The fact that those data are possessed by multiple sources that use independent systems for data collection, storage, and use impedes the exploitation of their value. Blockchains, as distributed ledgers, can be used for addressing the development of a universal system for data collection and distribution. Smart contracts can be used to automate all the processes of such a network, while at the same time, blockchain and the InterPlanetary File System (IPFS) protect sensitive data through anonymity and distributed storage. An innovative and open IoT blockchain market of applications, data, and services is proposed that: (i) provides the framework upon which objects and people can exchange value in form of virtual curren...
Computers
Attempts to facilitate and streamline systems architecting have resulted in a great number of reu... more Attempts to facilitate and streamline systems architecting have resulted in a great number of reusable principles, practices, mechanisms, frameworks, and tools. Such a practice is the use of architectural viewpoints and views. However, as systems change, these practices should also evolve. The increasing scale and complexity of systems resulting from an ever-growing pool of human needs and breakthroughs may lead, in some cases, to an increased gap between the abstraction activities attempting to capture the whole of a system, and the instantiation activities that produce concrete and detailed descriptions of a system’s architecture. To address this issue, this article introduces a new notion, that of architectural glimpse statements, fundamental questions acting as the building blocks for architectural views and products. This notion can help architects ask the right questions in the right manner to create fundamental statements, the elaboration on which can lead directly to concret...
Proceedings of the International Astronomical Union
Section 1 of the FM14 focus on bridging the astronomy research and outreach communities - recent ... more Section 1 of the FM14 focus on bridging the astronomy research and outreach communities - recent highlights, emerging collaborations, best practices and support structures. This paper also contains supplementary materials that point to contributed talks and poster presentations that can be found online.
In the forefront of efforts to curb energy consumption and as a consequence decrease greenhouse e... more In the forefront of efforts to curb energy consumption and as a consequence decrease greenhouse emissions, cities as well as individuals, turn to the field of Smart Homes to optimize their heating schedules through IoT-enabled solutions. However in many cases efforts are focusing on algorithms and systems requiring large amounts of processing power and constant data availability to be effective. In this paper, an approach tailored to the constrained resources in the IoT domain is introduced that is based on the Social IoT paradigm, instead of centralized computational nodes. The framework enables Smart Home Gateways to seek solutions to their heating schedule needs through communication of actual observations with fellow homes rather than brute force calculations based on probabilistic models that may require centralized approaches. Using the provided IoT components of the COSMOS ecosystem, Smart Homes may run purpose-built applications that use stored Knowledge, communicate it throughout the Network of Things and act on it in ways which aid the end users in retrieving relevant solutions. Raspberry-based simulations indicate that this diffusion of Knowledge as well as the improvements and evaluations through feedback performed on it, allow for the creation of a lightweight and resource effective approach, on the problem of Heating Management.
—The integration of social networking concepts into Internet of Things systems is a burgeoning to... more —The integration of social networking concepts into Internet of Things systems is a burgeoning topic of research that promises to support novel and more powerful applications. In this paper we present the social approach that the COSMOS project introduces in order to achieve enhanced services like discovery, recommendation and sharing between Things enriched with social properties. We investigate how typical notions and modes of interactions of social networking can be extended to the networks of Things, providing a Social Internet of Things platform, and we discuss two main components supporting the socialization of Things: Social Monitoring and Social Analysis. The first one involves all the main tools and techniques needed for the monitoring of the social properties of the Things, whereas Social Analysis is used for the extraction of their complex social characteristics, as well as models and patterns regarding their behavior and relations between them.
— Recently, the idea that the Internet of Things (IoT) systems can be advantaged in many ways by ... more — Recently, the idea that the Internet of Things (IoT) systems can be advantaged in many ways by integrating social networking concepts is gaining momentum. In this paper we present the social approach that the COSMOS project introduces. COSMOS supports knowledge flow between Things in order to provide a system that learns, observes and evaluates the usage and communication patterns and generates new knowledge. It focuses on the value of experience and experience-sharing and investigates models and principles designed for the social networks, which would provide it with the potential to support novel applications in more effective and efficient ways.
The Internet of Things (IoT) will exponentially increase the scale and the complexity of existing... more The Internet of Things (IoT) will exponentially increase the scale and the complexity of existing computing and communication systems. In a world of multi-stakeholder information and assets provision on top of millions of real-time interacting and communicating Things, autonomicity is an imperative property and a grand challenge. Autonomic Things will allow systems to self-manage the complexity, the dynamicity and the distribution of the IoT. In order to make Things able to manage themselves and contribute to the global self-management network, we have to empower them with mandatory properties like situational-awareness, knowledge, smartness and social behavior. In this paper we present the approach that the COSMOS project introduces in order to enable Things to evolve and act in a more autonomous way, becoming more reliable and smarter.
—The integration of social networking concepts into Internet of Things systems is a burgeoning to... more —The integration of social networking concepts into Internet of Things systems is a burgeoning topic of research that promises to support novel and more powerful applications. In this paper we focus on the design and implementation of a highly scalable Trust and Reputation Model for the Internet of Things based on the social approach that the COSMOS project introduces, as part of its final results. We create our model by combining popular solutions proposed for Peer-to-Peer and mobile ad-hoc networks and adapting them on the Internet of Things concept. Each Thing can compute the Trust index of another Thing based on its own experiences, while it has the capability of determining its Reputation Index either by consulting its other " friends " (Followees) or referring to the Platform, a management system used in COSMOS. The model is tested through simulations of the proposed social system, demonstrating the ability of TRM-SIoT to achieve the Social Exclusion of malicious nodes and collectives from the network, with low computational overhead and high scalability. Furthermore, due to the adaptive nature of the system, Social Reintegration of these nodes is also possible.
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Papers by Orfefs Voutyras