Browsing Τμήμα Πληροφορικής / Department of Computer Science by Submit Date
Now showing items 1-20 of 1946
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Conference Object
Exploring HPC parallelism with data-driven multithreating
(IEEE Computer Society, 2013)The switch to Multi-core systems has ended the reliance on the single processor for increase in performance and moved into Parallelism. However, the exponential growth in performance of the single processor in the 80's and ...
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Internet computing: Using reputation to select workers from a pool
(2016)The assignment and execution of tasks over the Internet is an inexpensive solution in contrast with supercomputers. We consider an Internet-based Master-Worker task computing approach, such as SETI@home. A master process ...
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Reputation-based mechanisms for evolutionary master-worker computing
(2013)We consider Internet-based Master-Worker task computing systems, such as SETI@home, where a master sends tasks to potentially unreliable workers, and the workers execute and report back the result. We model such computations ...
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Applying the dynamics of evolution to achieve reliability in master-worker computing
(2013)We consider Internet-based master-worker task computations, such as SETI@home, where a master process sends tasks, across the Internet, to worker processes
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Conference Object
Algorithmic mechanisms for internet supercomputing under unreliable communication
(2011)This work, using a game-theoretic approach, considers Internet-based computations, where a master processor assigns, over the Internet, a computational task to a set of untrusted worker processors, and collects their ...
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The role of twitter in YouTube videos diffusion
(2012)Understanding the effects of social cascading on streaming media is of great importance to Web information system engineering. Given the large amount of available videos, it is often difficult for users to discover interesting ...
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Texture-based classification of atherosclerotic carotid plaques
(2003)There are indications that the morphology of atherosclerotic carotid plaques, obtained by high-resolution ultrasound imaging, has prognostic implications. The objective of this study was to develop a computer-aided system ...
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Conference Object
AM-FM representations for the characterization of carotid plaque ultrasound Images
(2008)Stroke is the third leading cause of death in the western world and a major cause of disability in adults. The objective of this work was to investigate the use of AM-FM representations for the characterization of carotid ...
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Conference Object
Multi feature texture analysis for the classification of carotid plaques
(IEEE, 1999)The objective of this work was to develop a computer aided system which will facilitate the automated characterization of carotid plaques recorded from high resolution ultrasound images for the identification of individuals ...
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Brief announcement: Algorithmic mechanisms for internet-based computing under unreliable communication
(2011)This work, using a game-theoretic approach, considers Internet-based computations, where a master processor assigns, over the Internet, a computational task to a set of untrusted worker processors, and collects their ...
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Conference Object
ICT systems and services for Ageing Well: Identification and assessment of an important set (package) of ICT services for active ageing and independent living
(Springer Verlag, 2016)Currently, the main care model for supporting elderly people living alone at home is based on informal and formal caregivers assistance. Considering the demographic changes of older population, which increases rapidly, ...
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Conference Object
An enhanced MBMS service provision approach for improved performance in UTRAN
(2011)As currently specified by 3GPP for UMTS, MBMS services are provided within a cell, either by P-t-P or by P-t-M transmission mode, but not both at the same time. Our previous work highlighted the inefficiencies that can ...
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Conference Object
A NEHO based MBMS handover control approach
(2008)Handover Control is one of the essential means to guarantee the continuity of mobile services to a user traveling in a cellular infrastructure, without interruption. In previous work we illustrated that using the current ...
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Crowd Computing as a Cooperation Problem: An Evolutionary Approach
(2013)Cooperation is one of the socio-economic issues that has received more attention from the physics community. The problem has been mostly considered by studying games such as the Prisoner's Dilemma or the Public Goods Game. ...
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Conference Object
Brief announcement: Achieving reliability in master-worker computing via evolutionary dynamics
(2012)This work considers Internet-based task computations in which a master process assigns tasks, over the Internet, to rational workers and collect their responses. The objective is for the master to obtain the correct task ...
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A personalization method based on human factors for improving usability of user authentication tasks
(2014)Aiming to ensure safety of operation to application providers and improve the usability of human computer interactions during authentication, this paper proposes a two-step personalization approach of user authentication ...
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Towards the personalization of CAPTCHA mechanisms based on individual differences in cognitive processing
(2013)This paper studies the effect of individual differences on user performance related to text-recognition CAPTCHA challenges. In particular, a text-recognition CAPTCHA mechanism was deployed in a three-month user study to ...