Τμήμα Πληροφορικής / Department of Computer Science: Recent submissions
Now showing items 41-60 of 1952
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Practical Password Hardening Based on TLS
(Springer International Publishing, 2019)Text-based passwords are still the dominant form of user authentication in remote services. Beyond the many usability issues associated with handling several text-based passwords, security is also an important dimension. ...
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A Large-scale Analysis of Content Modification by Open HTTP Proxies
(2018)Open HTTP proxies offer a quick and convenient solution for routing web traffic towards a destination. In contrast to more elaborate relaying systems, such as anonymity networks or VPN services, users can freely connect ...
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Bridging Quantities in Tables and Text
(2019)There is a wealth of schema-free tables on the Web, holding valuable information about quantities on sales and costs, environmental footprint of cars, health data and more. Table content can only be properly interpreted ...
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Telco Big Data: Current State Future Directions
(2018)A Telecommunication company (Telco) is traditionally only perceived as the entity that provides telecommunication services, such as telephony and data communication access to users. However, the radio and backbone ...
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Article
Continuous decaying of telco big data with data postdiction
(2019)In this paper, we present two novel decaying operators for Telco Big Data (TBD), coined TBD-DP and CTBD-DP that are founded on the notion of Data Postdiction. Unlike data prediction, which aims to make a statement about ...
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EPUI: Experimental Platform for Urban Informatics
(Association for Computing Machinery, 2018)Recent studies in urban navigation have revealed new demands (e.g., diversity, safety, happiness, serendipity) for the navigation services that are critical to providing useful recommendations to travelers. This exposes ...
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A Qualitative and Quantitative Evaluation of Differential Signal Strength Fingerprinting Methods
(2019)Indoor location systems that rely on WiFi signal strength values from the existing building infrastructure deliver adequate accuracy with no installation cost at the expense of time and effort to populate the signal database. ...
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TBD-DP: Telco Big Data Visual Analytics with Data Postdiction
(2018)In this demonstration paper, we present the TBD-DP operator, which relies on existing Machine Learning (ML) algorithms to abstract Telco Big Data (TBD) into compact models that can be stored and queried when necessary. Our ...
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Article
IoT Data Prefetching in Indoor Navigation SOAs
(2018)Internet-based Indoor Navigation Service-Oriented Architectures (IIN-SOA) organize signals collected by IoT-based devices to enable a wide range of novel applications indoors, where people spend 80--90% of their time. In ...
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FMS: Managing Crowdsourced Indoor Signals with the Fingerprint Management Studio
(2018)In this demonstration paper, we present an integrated indoor signal management studio, coined Fingerprint Management Studio (FMS), which provides a spatio-temporal platform to: (i) manage the collection of location-dependent ...
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Future Directions for Indoor Information Systems: A Panel Discussion
(2018)Geographic Information Systems (GIS) have enabled a vast range of applications in outdoor spaces, but these systems are bound to accurate localization technologies that are not available inside buildings where people carry ...
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Generating Semantic Aspects for Queries
(Association for Computing Machinery, 2018)We present an approach to explore news archives by automatically generating semantic aspects for their navigation. Given a keyword query as an input, we utilize semantic annotations present in the pseudo-relevant set of ...
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Self-stabilizing Snapshot Objects for Asynchronous Failure-Prone Networked Systems
(Springer International Publishing, 2019)A snapshot object simulates the behavior of an array of single-writer/multi-reader shared registers that can be read atomically. Delporte-Gallet et al. proposed two fault-tolerant algorithms for snapshot objects in ...
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Self-stabilization Overhead: A Case Study on Coded Atomic Storage
(Springer International Publishing, 2019)Shared memory emulation on distributed message-passing systems can be used as a fault-tolerant and highly available distributed storage solution or as a low-level synchronization primitive. Cadambe et al. proposed the Coded ...
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A Comparison of Wearable and Stationary Equipment in An Experiment of Pain Induction
(Association for Contextual Behavioral Science, 2019)
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Atomic Appends: Selling Cars and Coordinating Armies with Multiple Distributed Ledgers
(Schloss Dagstuhl_Leibniz-Zentrum für Informatik (OASIcs), 2019)The various applications using Distributed Ledger Technologies (DLT) or blockchains, have led to the introduction of a new `marketplace' where multiple types of digital assets may be exchanged. As each blockchain is designed ...
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Article
Confidential gossip
(2019)Epidemic gossip has proven a reliable and efficient technique for sharing information in a distributed network. Much of this reliability and efficiency derives from processes collaborating, sharing the work of distributing ...
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Brief Announcement: Implementing Byzantine Tolerant Distributed Ledger Objects
(Schloss Dagstuhl–Leibniz-Zentrum fuer Informatik, 2019)
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Using Machine Learning to Classify and Predict Avoidance vs. Acceptance in Individuals with Health Risk
(Association for Contextual Behavioral Science, 2019)