no code implementations • 8 Feb 2024 • Konstantinos Zacharopoulos, Georgios Koutroumpas, Ioannis Arapakis, Konstantinos Georgopoulos, Javad Khangosstar, Sotiris Ioannidis
The cellular network plays a pivotal role in providing Internet access, since it is the only global-scale infrastructure with ubiquitous mobility support.
1 code implementation • 6 Jun 2023 • Alexander Shevtsov, Despoina Antonakaki, Ioannis Lamprou, Ioannis Kontogiorgakis, Polyvios Pratikakis, Sotiris Ioannidis
This study focuses on the Twitter suspension mechanism and the analysis of shared content and features of the user accounts that may lead to this.
no code implementations • 31 May 2023 • Alexander Shevtsov, Despoina Antonakaki, Ioannis Lamprou, Polyvios Pratikakis, Sotiris Ioannidis
We collect the ground truth for our dataset through the Twitter API suspended accounts collection, containing approximately 343K of bot accounts and 8M of normal users.
1 code implementation • 15 Jun 2022 • Christos Tzagkarakis, Pavlos Charalampidis, Stylianos Roubakis, Alexandros Fragkiadakis, Sotiris Ioannidis
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 restrictions in terms of computational power and energy resources.
1 code implementation • 7 Apr 2022 • Alexander Shevtsov, Christos Tzagkarakis, Despoina Antonakaki, Polyvios Pratikakis, Sotiris Ioannidis
On 24 February 2022, Russia invaded Ukraine, also known now as Russo-Ukrainian War.
1 code implementation • 8 Dec 2021 • Alexander Shevtsov, Christos Tzagkarakis, Despoina Antonakaki, Sotiris Ioannidis
Twitter is one of the most popular social networks attracting millions of users, while a considerable proportion of online discourse is captured.
no code implementations • 16 Oct 2020 • Christos Liaskos, Shuai Niez, Ageliki Tsioliaridou, Andreas Pitsillides, Sotiris Ioannidis, Ian F. Akyildiz
A feedforward/backpropagate process optimizes these weights to match ideal propagation outcomes (normalized network power outputs) to wireless user emissions (normalized network power inputs).
no code implementations • 7 May 2019 • Christos Liaskos, Ageliki Tsioliaridou, Shuai Nie, Andreas Pitsillides, Sotiris Ioannidis, Ian Akyildiz
A network of SDMs deployed over objects within an area, such as a floorplan walls, creates programmable wireless environments (PWEs) with fully customizable propagation of waves within them.
1 code implementation • 3 Jan 2019 • Kostas Drakonakis, Panagiotis Ilia, Sotiris Ioannidis, Jason Polakis
We further explore the mismatch between user actions and information exposure and find that older versions of the official Twitter apps follow a privacy-invasive policy of including precise GPS coordinates in the metadata of tweets that users have geotagged at a coarse-grained level (e. g., city).
Computers and Society Cryptography and Security