125 citations · 500 across the 36 of their papers we have counts for
38 papers
A Blueprint for Collaborative Cybersecurity Operations Centres with Capacity for Shared Situational Awareness, Coordinated Response, and Joint Preparedness
Konstantinos Fysarakis, Vasileios Mavroeidis, Manos Athanatos +2
With digital technologies now being part of the fabric of our societies, identifying and managing cybersecurity threats becomes imperative. Within the European Union, several initi…
Russo-Ukrainian War: Prediction and explanation of Twitter suspension
Alexander Shevtsov, Despoina Antonakaki, Ioannis Lamprou +3
On 24 February 2022, Russia invaded Ukraine, starting what is now known as the Russo-Ukrainian War, initiating an online discourse on social media. Twitter as one of the most popul…
Zero-Energy Reconfigurable Intelligent Surfaces (zeRIS)
Dimitrios Tyrovolas, Sotiris A. Tegos, Vasilis K. Papanikolaou +6
A primary objective of the forthcoming sixth generation (6G) of wireless networking is to support demanding applications, while ensuring energy efficiency. Programmable wireless en…
Dynamic Programmable Wireless Environment with UAV-mounted Static Metasurfaces
Prodromos-Vasileios Mekikis, Dimitrios Tyrovolas, Sotiris Tegos +8
Reconfigurable intelligent surfaces (RISs) are artificial planar structures able to offer a unique way of manipulating propagated wireless signals. Commonly composed of a number of…
An Open Platform for Simulating the Physical Layer of 6G Communication Systems with Multiple Intelligent Surfaces
Alexandros Papadopoulos, Antonios Lalas, Konstantinos Votis +4
Reconfigurable Intelligent Surfaces (RIS) constitute a promising technology that could fulfill the extreme performance and capacity needs of the upcoming 6G wireless networks, by o…
XR-RF Imaging Enabled by Software-Defined Metasurfaces and Machine Learning: Foundational Vision, Technologies and Challenges
C. Liaskos, A. Tsioliaridou, K. Georgopoulos +18
We present a new approach to Extended Reality (XR), denoted as iCOPYWAVES, which seeks to offer naturally low-latency operation and cost-effectiveness, overcoming the critical scal…
Evaluating Short-Term Forecasting of Multiple Time Series in IoT Environments
Christos Tzagkarakis, Pavlos Charalampidis, Stylianos Roubakis +2
Modern Internet of Things (IoT) environments are monitored via a large number of IoT enabled sensing devices, with the data acquisition and processing infrastructure setting restri…
Twitter Dataset on the Russo-Ukrainian War
Alexander Shevtsov, Christos Tzagkarakis, Despoina Antonakaki +2
On 24 February 2022, Russia invaded Ukraine, also known now as Russo-Ukrainian War. We have initiated an ongoing dataset acquisition from Twitter API. Until the day this paper was…
Pythia: Scheduling of Concurrent Network packet Processing Applications on Heterogeneous Devices [EXTENDED VERSION]
Giannis Giakoumakis, Eva Papadogiannaki, Giorgos Vasiliadis +1
Modern commodity computing systems are composed by a number of different heterogeneous processing units, each of which has its own unique performance and energy characteristics. Ho…
Identification of Twitter Bots Based on an Explainable Machine Learning Framework: The US 2020 Elections Case Study
Alexander Shevtsov, Christos Tzagkarakis, Despoina Antonakaki +1
Twitter is one of the most popular social networks attracting millions of users, while a considerable proportion of online discourse is captured. It provides a simple usage framewo…
Analysis of Twitter and YouTube during USelections 2020
Alexander Shevtsov, Maria Oikonomidou, Despoina Antonakaki +2
The presidential elections in the United States on 3 November 2020 have caused extensive discussions on social media. A part of the content on US elections is organic, coming from…
Discovery and classification of Twitter bots
Alexander Shevtsov Alexander Shevtsov, Maria Oikonomidou, Despoina Antonakaki +4
A very large number of people use Online Social Networks daily. Such platforms thus become attractive targets for agents that seek to gain access to the attention of large audience…
End-to-end Wireless Path Deployment with Intelligent Surfaces Using Interpretable Neural Networks
Christos Liaskos, Shuai Niez, Ageliki Tsioliaridou +3
Intelligent surfaces exert deterministic control over the wireless propagation phenomenon, enabling novel capabilities in performance, security and wireless power transfer. Such su…
Mobility-aware Beam Steering in Metasurface-based Programmable Wireless Environments
Christos Liaskos, Shuai Nie, Ageliki Tsioliaridou +3
Programmable wireless environments (PWEs) utilize electromagnetic metasurfaces to transform wireless propagation into a software-controlled resource. In this work we study the effe…
The Software-Defined Metasurfaces Concept and Electromagnetic Aspects
Anna C. Tasolamprou, Alexandros Pitilakis, Odysseas Tsilipakos +17
We present the concept and electromagnetic aspects of HyperSurFaces (HSFs), artificial, ultrathin structures with software controlled electromagnetic properties. The HSFs key unit…
ABSense: Sensing Electromagnetic Waves on Metasurfaces via Ambient Compilation of Full Absorption
C. Liaskos, G. Pirialakos, A. Pitilakis +13
Metasurfaces constitute effective media for manipulating and transforming impinging EM waves. Related studies have explored a series of impactful MS capabilities and applications i…
Clash of the Trackers: Measuring the Evolution of the Online Tracking Ecosystem
Konstantinos Solomos, Panagiotis Ilia, Sotiris Ioannidis +1
Websites are constantly adapting the methods used, and intensity with which they track online visitors. However, the wide-range enforcement of GDPR since one year ago (May 2018) fo…
Exploration of Intercell Wireless Millimeter-Wave Communication in the Landscape of Intelligent Metasurfaces
Anna C. Tasolamprou, Alexandros Pitilakis, Sergi Abadal +19
Software-defined metasurfaces are electromagnetically ultra-thin, artificial components that can provide engineered and externally controllable functionalities. The control over th…
An Interpretable Neural Network for Configuring Programmable Wireless Environments
Christos Liaskos, Ageliki Tsioliaridou, Shuai Nie +3
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 p…
Organizing Network Management Logic with Circular Economy Principles
Christos Liaskos, Ageliki Tsioliaridou, Sotiris Ioannidis
The traditional cycle of industrial products has been linear since its inception. Raw resources are acquired, processed, distributed, used and ultimately disposed of. This linearit…
Joint Compressed Sensing and Manipulation of Wireless Emissions with Intelligent Surfaces
Christos Liaskos, Ageliki Tsioliaridou, Alexandros Pitilakis +8
Programmable, intelligent surfaces can manipulate electromagnetic waves impinging upon them, producing arbitrarily shaped reflection, refraction and diffraction, to the benefit of…
Please Forget Where I Was Last Summer: The Privacy Risks of Public Location (Meta)Data
Kostas Drakonakis, Panagiotis Ilia, Sotiris Ioannidis +1
The exposure of location data constitutes a significant privacy risk to users as it can lead to de-anonymization, the inference of sensitive information, and even physical threats.…
Modeling, Simulating and Configuring Programmable Wireless Environments for Multi-User Multi-Objective Networking
Christos Liaskos, Ageliki Tsioliaridou, Shuai Nie +3
Programmable wireless environments enable the software-defined propagation of waves within them, yielding exceptional performance potential. Several building-block technologies hav…
Talon: An Automated Framework for Cross-Device Tracking Detection
Konstantinos Solomos, Panagiotis Ilia, Sotiris Ioannidis +1
Although digital advertising fuels much of today's free Web, it typically does so at the cost of online users' privacy, due to the continuous tracking and leakage of users' persona…