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Displaying 1-28 out of 28 total
Intensive Care Window: A Multi-Modal Monitoring Tool for Intensive Care Research and Practice
Found in: Computer-Based Medical Systems, IEEE Symposium on
By Harald Gjermundrod, Marios Papa, Demetrios Zeinalipour-Yazti, Marios D. Dikaiakos, George Panayi, Theodoros Kyprianou
Issue Date:June 2007
pp. 471-476
Intensive Care Units are widely considered as the most technologically advanced environments within a hospital. In such environments, physicians are confronted with multiple medical devices that monitor the inpatients. The capability to collect, store, pro...
 
Characterization of Computational Grid Resources Using Low-Level Benchmarks
Found in: e-Science and Grid Computing, International Conference on
By George Tsouloupas, Marios D. Dikaiakos
Issue Date:December 2006
pp. 70
An important factor that needs to be taken into account by end-users and systems (schedulers, resource brokers, policy brokers) when mapping applications to the Grid is the performance capacity of hardware resources attached to the Grid and made available ...
 
g-Social: Enhancing integrated e-science tools with Social Networking functionality
Found in: 2012 IEEE 8th International Conference on E-Science (e-Science)
By Andriani Stylianou,Nicholas Loulloudes,Marios D. Dikaiakos
Issue Date:October 2012
pp. 1-8
During the last decade, the scientific community has witnessed an unprecedented deployment of large-scale, federated e-Infrastructures such as Grid Computing, primarily for supporting data-intensive scientific exploration and coordinated problem solving. H...
 
A Query Formulation Language for the Data Web
Found in: IEEE Transactions on Knowledge and Data Engineering
By Mustafa Jarrar,Marios D. Dikaiakos
Issue Date:May 2012
pp. 783-798
We present a query formulation language (called MashQL) in order to easily query and fuse structured data on the web. The main novelty of MashQL is that it allows people with limited IT skills to explore and query one (or multiple) data sources without pri...
 
Effective Keyword Search for Software Resources Installed in Large-Scale Grid Infrastructures
Found in: Web Intelligence and Intelligent Agent Technology, IEEE/WIC/ACM International Conference on
By George Pallis, Asterios Katsifodimos, Marios D. Dikaiakos
Issue Date:September 2009
pp. 482-489
In this paper, we investigate the problem of supporting keyword-based searching for the discovery of software resources that are installed on the nodes of large-scale, federated Grid computing infrastructures. We address a number of challenges that arise f...
 
Robust Runtime Optimization of Data Transfer in Queries over Web Services
Found in: Data Engineering, International Conference on
By Anastasios Gounaris, Christos Yfoulis, Rizos Sakellariou, Marios D. Dikaiakos
Issue Date:April 2008
pp. 596-605
Self-managing solutions have recently attracted a lot of interest from the database community. The need for self-* properties is more evident in distributed applications comprising heterogeneous and autonomous databases and functionality providers. Such re...
 
Cloud Computing: Distributed Internet Computing for IT and Scientific Research
Found in: IEEE Internet Computing
By Marios D. Dikaiakos, Dimitrios Katsaros, Pankaj Mehra, George Pallis, Athena Vakali
Issue Date:September 2009
pp. 10-13
Cloud computing is location agnostic and provides dynamically scalable and virtualized resources as services over the Internet. Here, the authors provide broad introductory definitions to cloud computing concepts. Articles in this special issue investigate...
 
Harvesting Large-Scale Grids for Software Resources
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Asterios Katsifodimos, George Pallis, Marios D. Dikaiakos
Issue Date:May 2009
pp. 252-259
Grid infrastructures are in operation around the world, federating an impressive collection of computational resources and a wide variety of application software. In this context, it is important to establish advanced software discovery services that could...
 
Identifying Clusters with Attribute Homogeneity and Similar Connectivity in Information Networks
Found in: 2013 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT)
By Andreas Papadopoulos,George Pallis,Marios D. Dikaiakos
Issue Date:November 2013
pp. 343-350
With the rapid emergence of the internet world, a lot of information networks become available every day. In many cases, these information networks contain objects connected by multiple links and described by different attributes. In this paper the problem...
 
Continuous All k-Nearest-Neighbor Querying in Smartphone Networks
Found in: 2012 13th IEEE International Conference on Mobile Data Management (MDM)
By Georgios Chatzimilioudis,Demetrios Zeinalipour-Yazti,Wang-Chien Lee,Marios D. Dikaiakos
Issue Date:July 2012
pp. 79-88
Consider a centralized query operator that identifies to every smart phone user its k geographically nearest neighbors at all times, a query we coin Continuous All k-Nearest Neighbor (CAkNN). Such an operator could be utilized to enhance public emergency s...
 
Automated Tagging for the Retrieval of Software Resources in Grid and Cloud Infrastructures
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Ioannis Katakis,George Pallis,Marios D. Dikaiakos,Onisiforos Onoufriou
Issue Date:May 2012
pp. 628-635
A key challenge for Grid and Cloud infrastructures is to make their services easily accessible and attractive to end-users. In this paper we introduce tagging capabilities to the Miner soft system, a powerful tool for software search and discovery in order...
 
Infrastructures for Online Social Networking Services
Found in: IEEE Internet Computing
By Anwitaman Datta,Marios D. Dikaiakos,Seif Haridi,Liviu Iftode
Issue Date:May 2012
pp. 10-12
The rapid proliferation of social media, online communities, and collectively produced knowledge resources has accelerated the convergence of technological and social networks, resulting in a dynamic ecosystem of online social networking services, environm...
 
Querying the Data Web: The MashQL Approach
Found in: IEEE Internet Computing
By Mustafa Jarrar, Marios D. Dikaiakos
Issue Date:May 2010
pp. 58-67
MashQL, a novel query formulation language for querying and mashing up structured data on the Web, doesn't require users to know the queried data's structure or the data itself to adhere to a schema. In this article, the authors address the fact that being...
 
On the Evaluation of Caching in Vehicular Information Systems
Found in: Mobile Data Management, IEEE International Conference on
By Nicholas Loulloudes, George Pallis, Marios D. Dikaiakos
Issue Date:May 2010
pp. 218-220
VANETs have been envisioned as an infrastructure for deploying Vehicular Information Systems (VIS) that among others provide drivers with an up-to-date view on the prevailing traffic conditions. In this work we evaluate the benefits of caching vehicular in...
 
Identifying Failures in Grids through Monitoring and Ranking
Found in: Network Computing and Applications, IEEE International Symposium on
By Demetrios Zeinalipour-Yazti, Kyriacos Neocleous, Chryssis Georgiou, Marios D. Dikaiakos
Issue Date:July 2008
pp. 291-298
In this paper we present FailRank, a novel framework for integrating and ranking information sources that characterize failures in a grid system. After the failing sites have been ranked, these can be eliminated from the job scheduling resource pool yieldi...
 
An ActOn-based semantic information service for EGEE
Found in: Grid Computing, IEEE/ACM International Workshop on
By Wei Xing, Oscar Corcho, Carole Goble, Marios D. Dikaiakos
Issue Date:September 2007
pp. 81-88
We describe an information service that aggregates metadata available in hundreds of information sources of the EGEE Grid infrastructure. It uses an ontology-based information integration architecture (ActOn), which is suitable the highly dynamic distribut...
 
Crawler Detection: A Bayesian Approach
Found in: Internet Surveillance and Protection, International Conference on
By Athena Stassopoulou, Marios D. Dikaiakos
Issue Date:August 2006
pp. 16
In this paper, we introduce a probabilistic modeling approach for addressing the problem of Web robot detection from Web-server access logs. More specifically, we construct a Bayesian network that classifies automatically access-log sessions as being crawl...
 
A Core Grid Ontology for the Semantic Grid
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Wei Xing, Marios D. Dikaiakos, Rizos Sakellariou
Issue Date:May 2006
pp. 178-184
In this paper, we propose a Core Grid Ontology (CGO) that defines fundamental Grid-specific concepts, and the relationships between them. One of the key goals is to make this Core Grid Ontology general enough and easily extensible to be used by different G...
 
Mobile Agent Platforms for Web Databases: A Qualitative and Quantitative Assessment
Found in: Agent Systems and Applications, International Symposium on / International Symposium on Mobile Agents
By George Samaras, Marios D. Dikaiakos, Constantinos Spyrou, Andreas Liverdos
Issue Date:October 1999
pp. 50
In this paper we present practical experiences gathered from the employment of two popular Java-based mobile-agent platforms, IBM's Aglets and Mitsubishi's Concordia. We present some basic distributed computing models and describe their adaptation to the m...
 
JCatascopia: Monitoring Elastically Adaptive Applications in the Cloud
Found in: 2014 14th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid)
By Demetris Trihinas,George Pallis,Marios D. Dikaiakos
Issue Date:May 2014
pp. 226-235
Over the past decade, Cloud Computing has rapidly become a widely accepted paradigm with core concepts such as elasticity, scalability and on demand automatic resource provisioning emerging as next generation Cloud service-must have-properties. Automatic r...
 
GridBench: A Tool for Benchmarking Grids
Found in: Grid Computing, IEEE/ACM International Workshop on
By George Tsouloupas, Marios D. Dikaiakos
Issue Date:November 2003
pp. 60
The aim of the GridBench suite of Benchmarks is to bring together a core set of benchmarks for characterizing Grid nodes or collections of Grid resources. In order to do this in an organized and flexible way we provide a framework for running benchmarks on...
 
Minersoft: Software retrieval in grid and cloud computing infrastructures
Found in: ACM Transactions on Internet Technology (TOIT)
By Asterios Katsifodimos, George Pallis, Marios D. Dikaiakos
Issue Date:June 2012
pp. 1-34
One of the main goals of Cloud and Grid infrastructures is to make their services easily accessible and attractive to end-users. In this article we investigate the problem of supporting keyword-based searching for the discovery of software files that are i...
     
Evaluating the utility of content delivery networks
Found in: Proceedings of the 4th edition of the UPGRADE-CN workshop on Use of P2P, GRID and agents for the development of content networks (UPGRADE-CN '09)
By Athena Vakali, George Pallis, Konstantinos Stamos, Marios D. Dikaiakos
Issue Date:June 2009
pp. 1-2
Content Delivery Networks (CDNs) balance costs and quality in services related to content delivery. This has urged many Web entrepreneurs to make contracts with CDNs. In the literature, a wide range of techniques has been developed, implemented and standar...
     
MashQL: a query-by-diagram topping SPARQL
Found in: Proceeding of the 2nd international workshop on Ontologies and nformation systems for the semantic web (ONISW '08)
By Marios D. Dikaiakos, Mustafa Jarrar
Issue Date:October 2008
pp. 1001-1001
This article is motivated by the importance of building web data mashups. Building on the remarkable success of Web 2.0 mashups, and specially Yahoo Pipes, we generalize the idea of mashups and regard the Internet as a database. Each internet data source i...
     
A control theoretical approach to self-optimizing block transfer in Web service grids
Found in: ACM Transactions on Autonomous and Adaptive Systems (TAAS)
By Anastasios Gounaris, Christos Yfoulis, Marios D. Dikaiakos, Rizos Sakellariou
Issue Date:May 2008
pp. 1-30
Nowadays, Web Services (WS) play an important role in the dissemination and distributed processing of large amounts of data that become available on the Web. In many cases, it is essential to retrieve and process such data in blocks, in order to benefit fr...
     
VITP: an information transfer protocol for vehicular computing
Found in: Proceedings of the 2nd ACM international workshop on Vehicular ad hoc networks (VANET '05)
By Liviu Iftode, Marios D. Dikaiakos, Saif Iqbal, Tamer Nadeem
Issue Date:September 2005
pp. 30-39
Recent advances in wireless inter-vehicle communication systems enable the development of Vehicular Ad-Hoc Networks (VANET) and create significant opportunities for the deployment of a wide variety of vehicular applications and services. In this paper, we ...
     
A performance study of cosmological simulations on message-passing and shared-memory multiprocessors
Found in: Proceedings of the 10th international conference on Supercomputing (ICS '96)
By Joachim Stadel, Marios D. Dikaiakos
Issue Date:May 1996
pp. 94-101
To minimize the amount of computation and storage for parallel sparse factorization, sparse matrices have to be reordered prior to factorization. We show that none of the popular ordering heuristics proposed before, namely, mulitple minimum degree and nest...
     
The portable parallel implementation of two novel mathematical biology algorithms in ZPL
Found in: Proceedings of the 9th international conference on Supercomputing (ICS '95)
By Calvin Lin, Daphne Manoussaki, Diana E. Woodward, Marios D. Dikaiakos
Issue Date:July 1995
pp. 365-374
To minimize the amount of computation and storage for parallel sparse factorization, sparse matrices have to be reordered prior to factorization. We show that none of the popular ordering heuristics proposed before, namely, mulitple minimum degree and nest...
     
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