958 research outputs found
HealthyOffice: mood recognition at work using smartphones and wearable sensors
No full textStress, anxiety and depression in the workplace are detrimental to human health and productivity with significant financial implications. Recent research in this area has focused on the use of sensor technologies, including smartphones and wearables embedded with physiological and movement sensors. In this work, we explore the possibility of using such devices for mood recognition, focusing on work environments. We propose a novel mood recognition framework that is able to identify five intensity levels for eight different types of moods every two hours. We further present a smartphone app (‘HealthyOffice’), designed to facilitate self-reporting in a structured manner and provide our model with the ground truth. We evaluate our system in a small-scale user study where wearable sensing data is collected in an office environment. Our experiments exhibit promising results allowing us to reliably recognize various classes of perceived moods
Factors affecting trust and communication in global virtual teams
No full textAuthor Georgios GousiasMasterarbeit Universität Linz 2022Arbeit auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Factors affecting trust and communication in global virtual teams
No full textAuthor Georgios GousiasMasterarbeit Universität Linz 2022Arbeit auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Der griechische Gelehrte Georgios Zachariadis und sein Beitrag zum slawischen Schrifttum im 19. Jahrhundert
No full textAmong the Greek scholars who lived during the 19th century in the north-eastern Balkans, and also in Central Europe, and by their work contributed to the spiritual development of the Balkan Slavs, pride of place must be given to Georgios Zachariadis. Unfortunately, however, no detailed monograph on Zachariadis exists. On this account the problems that arise concerning the life and activities of this Greek scholar are still many and varied. In his study the author tries to fill one part of this lacuna. At the beginning of the work the following are examined, on the basis of new historical evidence: the date and place of Georgios Zachariadis’ birth, his studies and tenure as teacher in the Greek school at Zemun, the Serbian school at Šabac, and the Greek school in Vienna. The author continues his study by analyzing the various works of Zachariadis, which are written on Old Church^Slavonic, and the translations this Greek scholar made from Greek into Old Church Slavonic. Finally, the extent of Georgios Zachariadis’ contribution to Slavonic letters is made clear
The political program of Hellenism in Turkey
No full textTitle: Tό πoλιτικόν πρόγραμμα τοῦ Έλληνισμοῦ έν Tουρκία (The political program of Hellenism in Turkey) Originally published: as a leaflet in Istanbul, 1912 Language: GreekThe excerpts used are from the original which can be found at the ‘Ion Dragoumis archive’ in the Gennadion Library in Athens, pp. 7–9, 11–13, 24–25. About the author Georgios Boussios [1876, Grevena (Ottoman Macedonia) – 1929, Athens]: activist, politician and journalist. He was born into a well-off family of merchants. He c..
Preemptive mobile code protection using spy agents
No full textThis thesis introduces 'spy agents' as a new security paradigm for evaluating trust in remote hosts in mobile code scenarios. In this security paradigm, a spy agent, i.e. a mobile agent which circulates amongst a number of remote hosts, can employ a variety of techniques in order to both appear 'normal' and suggest to a malicious host that it can 'misuse' the agent's data or code without being held accountable.A framework for the operation and deployment of such spy agents is described. Subsequently, a number of aspects of the operation ofsuch agents within this framework are analysed in greater detail.The set of spy agent routes needs to be constructed in a manner thatenables hosts to be identified from a set of detectable agent-specific outcomes.The construction of route sets that both reduce the probability of spy agentdetection and support identification of the origin of a maliciousact is analysed in the context of combinatorial group testingtheory. Solutions to the route set design problem are proposed.A number of spy agent application scenarios are introduced andanalysed, including: a) the implementation of a mobile code email honeypot system for identifying email privacy infringers, b)the design of sets of agent routes that enable malicious hostdetection even when hosts collude, and c) the evaluationof the credibility of host classification resultsin the presence of inconsistent host behaviour. Spy agents can be used in awide range of applications, and it appears that each applicationcreates challenging new research problems, notably in the design ofappropriate agent route sets.<br/
Correction: Do chemistry and rheology follow the same laboratory ageing trends in bitumen?
No full text Correction to: Materials and Structures (2022) 55:146 https://doi.org/10.1617/s11527-022-01986-w The article “Do chemistry and rheology follow the same laboratory ageing trends in bitumen?”, written by Georgios Pipintakos, Caitlin Lommaert, Aikaterini Varveri and Wim Van den bergh, was originally published in volume 55, issue 5, ID 146 without open access. With the society's decision to grant Open Choice the copyright of the article changed in February 2023 to © The Author(s) 2022 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0. Open access funding enabled and organized by RILEM.Pavement Engineerin
A Transient Reliability Model of RTP Video Streaming over WLAN
No full textReliable real time wireless video streaming is a challenging network application due its high bandwidth and low delay/jitter requirements. IEEE 802.11e helps address such QoS challenges, e.g. by prioritising video over background traffic. The reliability problem occurs since it is very challenging (near impossible) for a WLAN protocol to guarantee QoS, especially with uncoordinated contention being the main access mechanism, along with increasing numbers of stations and interfering traffic, with the hostile wireless radioenvironment making any guarantee foolhardy. With the use of RTP, the video application has some control over end-to-end delay and jitter. Still, in the presence of excessive interference, RTP packet dropping might result in video quality degradation or video outage time. We study the reliability of wireless RTP video streaming over the EDCA MAC protocol, with the ability to forecast (and mitigate the effect of) video failures. Specifically, we introduce a model to evaluate both steady-state and transient video failures due to RTP buffer overflow, the overflow in turn due to WLAN co-channel interference. Quantitative reliability measurements are taken by configuring RTP and EDCA. We evaluate the average packet loss and average outage duration and we validate the theoretical results in an experimental setup. The proposed forecast mechanism could be coupled with and help optimise a) WLAN channel assignment in an ESS network, b) multipath (multi-channel/radio/hop) video routing, and c) adaptive rate control
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