Τμήμα Πληροφορικής / Department of Computer Science: Recent submissions
Now showing items 121-140 of 1952
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Article
DevOps as a Service: Pushing the Boundaries of Microservice Adoption
(2018)Software teams of all sizes are embracing the DevOps philosophy to rapidly deliver applications by adopting the microservice paradigm. Industry trends show clearly that microservice adoption is expanding rapidly. However, ...
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Article
Low-Cost Adaptive Monitoring Techniques for the Internet of Things
(2018)Internet-enabled physical devices with "smart" processing capabilities are becoming the tools for understanding the complexity of the global inter-connected world we inhabit. The Internet of Things (IoT) churns tremendous ...
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Conference Object
On the Accuracy of Eye Gaze-driven Classifiers for Predicting Image Content Familiarity in Graphical Passwords
(Association for Computing Machinery, 2019)Graphical passwords leverage the picture superiority effect to enhance memorability, and reflect today's haptic users' interaction realms. Images related to users' past sociocultural experiences (e.g., retrospective) enable ...
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Conference Object
Security And Privacy Of Medical Data: Challenges For Next-Generation Patient-Centric Healthcare Systems
(Association for Computing Machinery, 2019)We describe the recently-started EU H2020 Serums: Securing Medical Data in Smart Patient-Centric Healthcare Systems project that aims to develop novel techniques for safe and secure collection, storage, exchange and analysis ...
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Conference Object
3D channel modeling and characterization for hypersurface empowered indoor environment at 60 GHz millimeter-wave band
(Society for Computer Simulation International, 2019)This paper proposes a three-dimensional (3D) communication channel model for an indoor environment considering the effect of the Hypersurface. The Hypersurface is a software controlled intelligent metasurface, which can ...
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Conference Object
ABSense: Sensing Electromagnetic Waves on Metasurfaces via Ambient Compilation of Full Absorption
(2019)Metasurfaces constitute effective media for manipulating and transforming impinging EM waves. Related studies have explored a series of impactful MS capabilities and applications in sectors such as wireless communications, ...
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Conference Object
Joint Compressed Sensing and Manipulation of Wireless Emissions with Intelligent Surfaces
(2019)Programmable, intelligent surfaces can manipulate electromagnetic waves impinging upon them, producing arbitrarily shaped reflection, refraction and diffraction, to the benefit of wireless users. Moreover, in their recent ...
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Conference Object
Picture Passwords in Mixed Reality: Implementation and Evaluation
(Association for Computing Machinery, 2019)We present HoloPass, a mixed reality application for the HoloLens wearable device, which allows users to perform user authentication tasks through gesture-based interaction. In particular, this paper reports the implementation ...
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Conference Object
On the Personalization of Image Content in Graphical Passwords based on Users' Sociocultural Experiences: New Challenges and Opportunities
(Association for Computing Machinery, 2019)Recent works underpin the added value of considering users' past sociocultural experiences as a personalization factor for the image content used within graphical password schemes, since it has a positive impact on the ...
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Conference Object
FlexPass: Symbiosis of Seamless User Authentication Schemes in IoT
(Association for Computing Machinery, 2019)This paper presents a new user authentication paradigm which is based on a flexible user authentication method, namely FlexPass. FlexPass relies on a single, user-selected secret that can be reflected in both textual and ...
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Conference Object
Workload Characterization of Programmable Metasurfaces
(Association for Computing Machinery, 2019)Metasurfaces are envisaged to play a key role in next-generation wireless systems due to their powerful control over electromagnetic waves. The last decade has witnessed huge advances in this regard, shifting from static ...
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Conference Object
Dynamic selection of Virtual Small Base Station in 5G Ultra-Dense Network using Initializing Matching Connection Algorithm
(2019)The 5G cellular network is the new generation of mobile networks that will play a key role in supporting current and forthcoming demands for wireless access by various devices in an Ultradense network. Small Cells is the ...
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Conference Object
“I Recall this Picture”: Understanding Picture Password Selections based on Users’ Sociocultural Experiences
(2019)Graphical passwords leverage the picture superiority effect to enhance memorability, and reflect today's haptic user interaction realms. Image content related to users' past sociocultural experiences assists users with the ...
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Conference Object
Stochastically Resonant Spectrum Sensing Signal-to-Noise Ratio Improvements for Dynamic Spectrum Access Cognitive Radios
(2019)This paper investigates Stochastically Resonant Spectrum Sensing (SRSS) for Dynamic Spectrum Access (DSA) in TV White Space (TVWS) radio networks. We employ a typical Overdamped Bi-stable Oscillator and demonstrate the ...
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Conference Object
The SERUMS tool-chain: Ensuring Security and Privacy of Medical Data in Smart Patient-Centric Healthcare Systems
(2019)Future-generation healthcare systems will be highly distributed, combining centralised hospital systems with decentralised home-, work-and environment-based monitoring and diagnostics systems. These will reduce costs and ...
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Conference Object
Feedback Based Beam Steering for Intelligent Metasurfaces
(2019)This paper promotes the use of feedback in the design of a beam steering application using the intelligent metasurface paradigm. The control objective is to direct the incoming signal on the metasurface towards a single ...
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Conference Object
Wideband Perfect Absorption Polarization Insensitive Reconfigurable Graphene Metasurface for THz Wireless Environment
(2019)In this work, we investigated a simple structured graphene terahertz (THz) metasurface (MSF) with perfect absorption, wideband, polarization insensitive, oblique incidence insensitive and frequency reconfiguration. The ...
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Article
On the Network-Layer Modeling and Configuration of Programmable Wireless Environments
(2019)Programmable wireless environments enable the software-defined propagation of waves within them, yielding exceptional performance. Several building-block technologies have been implemented and evaluated at the physical ...
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Book Chapter
Terahertz Programmable Metasurfaces : Networks Inside Networks
(Taylor & Francis, 2019)Tunable metasurfaces are ultra-thin, artificial electromagnetic (EM) components that provide engineered and adjustable functionalities up to the terahertz (THz) band and beyond. The concept of software-defined metamaterials ...
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Conference Object
An Interpretable Neural Network for Configuring Programmable Wireless Environments
(2019)Software-defined metasurfaces (SDMs) comprise a dense topology of basic elements called meta-atoms, exerting the highest degree of control over surface currents among intelligent panel technologies. As such, they can ...