Joos-hendrik Böse, Stefan Böttcher, Panos Kypros Chrysanthis, Le Gruenwald, Anirban Mondal, Sebastian Obermeier, ...
Abstract. We introduce different mobile network applications and show to which degree the concept of database transactions is required within the applications. We show properties of transaction...
P2P, Ad Hoc and Sensor Networks – All the Different or All the Same? Working Group Summary (2009)
Peter A. Boncz, Angela Bonifati, Joos-hendrik Böse, Stefan Böttcher, Fu Berlin, ...
Summary. Currently, data management technologies are in the process of finding their way into evolving networks, i.e. P2P, ad hoc and wireless sensor networks. We examine the properties, differences...
Germanakos, Panagiotis, Tsianos, Nikos, Lekkas, Zacharias, Mourlas, Constantinos, Samaras, George
Challenges today in the Web personalization and adaptation research area range from heterogeneous user needs and user environment issues such as current location and time to multi-channel delivery of...
SenseSwarm: A Perimeter-based Data Acquisition Framework for Mobile Sensor Networks (2008)
Demetrios Zeinalipour-yazti, Panayiotis Andreou, Panos K. Chrysanthis, George Samaras
This paper assumes a set of n mobile sensors that move in the Euclidean plane as a swarm 1. Our objectives are to explore a given geographic region by detecting and aggregating spatio-temporal events...
Locating Objects in Mobile Computing Evaggelia Pitoura, Member, IEEE Computer Society, and (2008)
George Samaras, Ieee Computer Society
AbstractÐIn current distributed systems, the notion of mobility is emerging in many forms and applications. Mobility arises naturally in wireless computing since the location of users changes as...
A Mobile Agent Approach for Ubiquitous and Personalized eHealth Information Systems (2008)
Panagiotis Germanakos, Constantinos Mourlas, George Samaras
Abstract. The past years have witnessed a heavy investment and research in the eHealth sector. The work of medical practitioners at all levels is becoming more information intensive as sophisticated...
Panagiotis Germanakos, Constantinos Mourlas, Chara Isaia, George Samaras
Abstract: A traditional system presents the same static explanation and suggests the same next page to all users, even though they might have widely differing knowledge of the subject. Such a system...
Innovative Personalization Issues for Providing User-Centric mGovernment Services (2008)
Panagiotis Germanakos, George Samaras, Constantinos Mourlas, Eleni Christodoulou
Abstract: Advances in mGovernment oriented technologies and services are taking place with a considerable speed around the world. As communications and other IT usage becomes an integral part of many...
Panagiotis Germanakos, Nikos Tsianos, Zacharias Lekkas, Constantinos Mourlas, George Samaras
Adapting to user context, individual features and behaviour patterns is a topic of great attention nowadays in the field of Web-based and mobile learning. A challenge is to design personalized...
George Samaras, Kyriakos Karenos
ViSMA (Views Supported by Mobile Agents) is an implementation of a flexible and extendible mobile-agent based system that allows the definition, materialization, maintenance and sharing of...
Panagiotis Germanakos, Constantinos Mourlas, Christoforos Panayiotou, George Samaras
Abstract. The plethora of information and services as well as the complicated nature of most Web structures intensify the navigational difficulties that arise when users navigate their way through...
A Mobile Agent Approach for Ubiquitous and Personalized eHealth Information Systems (2008)
Panagiotis Germanakos, Constantinos Mourlas, George Samaras
Abstract. The past years have witnessed a heavy investment and research in the eHealth sector. The work of medical practitioners at all levels is becoming more information intensive as sophisticated...
P.K.: Two-phase commit processing with restructured commit tree (2008)
George Samaras, George K. Kyrou, Andpanos K. Chrysanthis
Abstract. Extensive research has been carried out in search for an efcient atomic commit protocol and many optimizations have been suggested to improve the basic two-phase commit protocol, either for...
A Grid Service Framework for Metadata Management in Self e-Learning Networks (2008)
George Samaras, Kyriakos Karenos, Eleni Christodoulou
Abstract. Metadata management is critical for Grid systems. More specifically, semantically meaningful resource descriptions constitute a highly beneficial extension to Grid environments that started...
They Here to Stay? (PANEL) (2008)
Mobile Agents have brought around a new way to perform computations and develop distributed application and it is now struggling for a visible position in the area of distributed and wireless...
Tele-homecare supported by the DITIS collaborative platform (2008)
Andreas Pitsillides, George Samaras, Dimosthenis Georgiadis, Eleni Christodoulou, Barbara Pitsillides
Abstract: Nurses, doctors, physiotherapists, social workers, psychologists and others come together to provide care to home residing patients including elderly people, making continuous assessment,...
SenseSwarm: A Perimeter-based Data Acquisition Framework for Mobile Sensor Networks (2008)
Demetrios Zeinalipour-yazti, Panayiotis Andreou, Panos K. Chrysanthis, George Samaras
This paper assumes a set of n mobile sensors that move in the Euclidean plane as a swarm 1. Our objectives are to explore a given geographic region by detecting and aggregating spatio-temporal events...
al.: Mobile agent-based services for view materialization (2008)
Kyriakos Karenos, George Samaras, Panos K. Chrysanthis, Evaggelia Pitoura
Mobile agents are ideal for mobile computing environments because of their ability to support asynchronous communication and disconnected data processing. In this paper, we present a prototype set of...
Communities: Concept-Based Querying for Mobile Services (2008)
Chara Skouteli, Christoforos Panayiotou, George Samaras, Evaggelia Pitoura
Abstract. In this paper, we consider semantic service discovery in a global computing environment. We propose creating a dynamic overlay network by grouping together semantically related services....
They Here to Stay? (PANEL) (2008)
Mobile Agents have brought around a new way to perform computations and develop distributed application and it is now struggling for a visible position in the area of distributed and wireless...
Personalized Portals for the Wireless and Mobile User; a Mobile Agent Approach: Demonstration (2008)
Christoforos Panayiotou, George Samaras
The Wireless environment requires new type of services and new ways for structuring the needed content. Personalization comes into aid via the creation of personalized portals that directly tones...
ffl Peer-to-Peer Models ffl Mobile Agent Models (2008)
Ffl Evanggelia Pitoura, George Samaras, Data Management For
Four Characteristic Constraints due to Mobility: 1. Mobile elements are resource-poor relative to static elements. 2. Mobility is inherently hazardous. 3. Mobile connectivity is highly variable in...
The MicroPulse Framework for Adaptive Waking Windows in Sensor Networks (2008)
Demetrios Zeinalipour-yazti, Panayiotis Andreou, Panos K. Chrysanthis, George Samaras, Andreas Pitsillides
Abstract—In this paper we present MicroPulse, a novel framework for adapting the waking window of a sensing device S based on the data workload incurred by a query Q. Assuming a typical tree-based...
Overview of MPOWER: Middleware Platform for the Cognitively Impaired and Elderly (2008)
Andreas Pitsillides, Eleni Themistokleous, George Samaras, Ole M Winnem
Abstract: The number of cognitively impaired and chronically ill elderly is increasing. The main objective is to support older people living independently in their homes as long as possible, with...
On Network Survivability Algorithms based on Trellis (2008)
Graph Transformations, Soulla Louca, Andreas Pitsillides, George Samaras
Due to the wide range of services being supported, telecommunications networks are loaded with massive quantities of information. This stimulates extra concern for network survivability. In this...
DITIS: Collaborative Virtual Medical team for home healthcare of cancer patients (2008)
Cancer Patients, Andreas Pitsillides, George Samaras, Marios Dikaiakos, Kyriacos Olympios, Eleni Christodoulou
Complex and chronic illnesses, such as Cancer demand the use of specialist treatment protocols, administered and monitored by a co-ordinated team of professionals. Home based care of chronic...
Minimizing the Network Distance in Distributed Web Crawling (2008)
Odysseas Papapetrou, George Samaras
Distributed crawling has shown that it can overcome important limitations of the centralized crawling paradigm. However, the distributed nature of current distributed crawlers is currently not fully...
Handling Parallel Processing in Multimedia Systems (2007)
Andrew P. Citron, George Samaras
This paper introduces a way of capturing and processing data in a multimedia real-time environment of parallel processes, where the data must be processed quickly before it becomes obsolete. It...
Odysseas Papapetrou, Stavros Papastavrou, George Samaras
Due to the tremendous increase rate and the high change frequency of Web documents, maintaining an up-to-date index for searching purposes (search engines) is becoming a challenge. The traditional...
P.K.: Two-phase commit processing with restructured commit tree (2007)
George Samaras, George K. Kyrou, Andpanos K. Chrysanthis
Abstract. Extensive research has been carried out in search for an efcient atomic commit protocol and many optimizations have been suggested to improve the basic two-phase commit protocol, either for...
Evaggelia Pitoura, George Samaras
In current distributed systems, the notion of mobility is emerging in many forms and applications. Mobility arises naturally in wireless computing, since the location of users changes as they move....
Stavros Papastavrou, Panos Chrysanthis, George Samaras, Evaggelia Pitoura
Abstract. Given the undeniable popularity of the Web, providing efficient and secure access to remote databases using a Web browser is crucial for the emerging cooperative information systems and...
Parse & Dispatch: Parallelizing the Generation of Dynamic Web Content (2007)
Stavros Papastavrou, George Samaras, Paraskevas Evripidou, Panos K. Chrysanthis
The use of dynamically generated Web content is gaining in popularity over traditional static HTML content. Dynamic Web content is generated on the fly according to the instructions embedded in HTML...
Mint views: Materialized in-network top-k views in sensor networks (2007)
Demetrios Zeinalipour-yazti, Panayiotis Andreou, Panos K. Chrysanthis, George Samaras
Abstract—In this paper we introduce MINT (Materialized In-Network Top-k) Views, a novel framework for optimizing the execution of continuous monitoring queries in sensor networks. A typical...
Mint views: Materialized in-network top-k views in sensor networks (2007)
Demetrios Zeinalipour-yazti, Panayiotis Andreou, Panos K. Chrysanthis, George Samaras
Abstract—In this paper we introduce MINT (Materialized In-Network Top-k) Views, a novel framework for optimizing the execution of continuous monitoring queries in sensor networks. A typical...
Boncz, Peter A., Bonifati, Angela, Böse, Joos-Hendrik, Böttcher, Stefan, Chrysanthis, Panos Kypros, Gruenwald, Le, ...
Currently, data management technologies are in the process of finding their way into evolving networks, i.e. P2P, ad hoc and wireless sensor networks. We examine the properties, differences and...
06431 Working Group Summary: Atomicity in Mobile Networks (2007)
Obermeier, Sebastian, Böse, Joos-Hendrik, Böttcher, Stefan, Chrysanthis, Panos Kypros, Delis, Alex, Gruenwald, Le, ...
We introduce different mobile network applications and show to which degree the concept of database transactions is required within the applications. We show properties of transaction processing and...
04441 Working Group - Research Issues in Mobile Transactions (2005)
Böse, Joos-Hendrik, Böttcher, Stefan, Gruenwald, Le, Pitoura, Evaggelia, Reiher, Peter, Samaras, George, ...
This document discusses three scenarios for databases with mobile clients, summarizes typical applications and requirements for each of the three scenarios, and outlines the open research issues...
© Rinton Press DITIS: VIRTUAL COLLABORATIVE TEAMS FOR HOME HEALTHCARE (2005)
Andreas Pitsillides, George Samaras, Barbara Pitsillides, Panayiotis Andreou, Eleni Christodoulou
Panagiotis Germanakos, Nikos Tsianos, Constantinos Mourlas, George Samaras
There is a growing body of empirical evidence to suggest that users tend to make poor decisions in traditional educational systems as the navigational freedom given to the user leads to comprehension...
04441 Working Group -- Description and Matching of Services in Mobile Environments (2005)
Grünbauer, Johannes, Klein, Michael, Koloniari, Georgia, Samaras, George, Türker, Can
Service oriented computing is a new paradigm that is especially interesting in mobile environments. As a characteristics, functionality is hidden behind an interface and described as a black box with...
04441 Working Group -- Research Issues in Mobile Transactions (2005)
Böse, Joos-Hendrik, Böttcher, Stefan, Gruenwald, Le, Pitoura, Evaggelia, Reiher, Peter, Samaras, George, ...
This document discusses three scenarios for databases with mobile clients, summarizes typical applications and requirements for each of the three scenarios, and outlines the open research issues...
Minimizing the Network Distance in Distributed Web Crawling (2004)
Odysseas Papapetrou, George Samaras
Distributed crawling has shown that it can overcome important limitations of the centralized crawling paradigm. However, the distributed nature of current distributed crawlers is currently not fully...
IPMicra: Toward a distributed and adaptable location aware web crawler (2004)
Odysseas Papapetrou, George Samaras
Distributed crawling has shown that it can overcome important limitations of the centralized crawling paradigm. However, the distributed nature of current distributed crawlers is currently not fully...
IPMicra: An IP-address based Location Aware Distributed Web Crawler (2004)
Odysseas Papapetrou, George Samaras
Distributed crawling is able to overcome important limitations of the traditional single-sourced web crawling systems. However, the optimal benefit of distributed crawling is usually limited to the...
Distributed Location Aware Web Crawling (2004)
Odysseas Papapetrou, George Samaras
Distributed crawling has shown that it can overcome important limitations of the today's crawling paradigm. However, the optimal benefits of this approach are usually limited to the sites...
Fine-Grained Parallelism in Dynamic Web Content Generation: The Parse & Dispatch Approach (2004)
Stavros Papastavrou, George Samaras, Paraskevas Evripidou, Panos K. Chrysanthis
Dynamic Web content is gaining in popularity over traditional static HTML as the means of providing Web users with personalized and dynamic information. To enable dynamic content, various...
ContextAware Queries Using Query by Browsing and Chiromancer (2004)
Stavros Polyviou, Paraskevas Evripidou, George Samaras
In this paper we present Chiromancer, a relationally complete visual query language for the Palm handheld platform, based on the Query by Browsing paradigm. We discuss the suitability of the...
Constantinos Spyrou, George Samaras
Abstract. Wireless mobile computing breaks the stationary barrier and allows users to compute and access information from anywhere and at anytime. However, this new freedom of movement does not come...
mPERSONA: Personalized Portals for the Wireless User: An Agent Approach (2004)
Christoforos Panayiotou, George Samaras
The needs of the wireless and mobile user regarding information access and services are quite different than those of the desktop user. This need is not about browsing the Web but about receiving...
G.: A scalable hash-based mobile agent location mechanism (2003)
Georgia Kastidou, Evaggelia Pitoura, George Samaras
In this paper, we propose a novel mobile agent tracking mechanism based on hashing. To allow our system to adapt to variable workloads, dynamic rehashing is supported. The proposed mechanism scales...
DBGlobe: A Service-Oriented P2P System for Global Computing (2003)
Evaggelia Pitoura, Serge Abiteboul, Dieter Pfoser, George Samaras, Michalis Vazirgiannis
The challenge of peer-to-peer computing goes beyond simple file sharing. In the DBGlobe project, we view the multitude of peers carrying data and services as a superdatabase. Our goal is to develop a...
DBGlobe: A Service-Oriented P2P System for Global Computing (2003)
Evaggelia Pitoura, Serge Abiteboul, Dieter Pfoser, George Samaras, Michalis Vazirgiannis
The challenge of peer-to-peer computing goes beyond simple file sharing. In the DBGlobe project, we view the multitude of peers carrying data and services as a superdatabase. Our goal is to develop a...
Ucymicra: Distributed indexing of the web using migrating crawlers (2003)
Odysseas Papapetrou, Stavros Papastavrou, George Samaras
Abstract. Due to the tremendous increase rate and the high change frequency of Web documents, maintaining an up-to-date index for searching purposes (search engines) is becoming a challenge. The...
View Generator (VG): A Mobile Agent Based System for the Creation and (2002)
Maintenance Of Web, George Samaras
The View Generator (VG) is a system that provides the necessary components for the definition, materialization, storage, maintenance and re-use of views over remote web-accessible databases. Through...
A Flexible Personalization Architecture for Wireless Internet Based on Mobile Agents (2002)
George Samaras, Christoforos Panayiotou
Abstract. The explosive growth of the Internet has fuelled the creation of new and exciting information services. Most of the current technology has been designed for desktop and larger computers...
M.: Tracker: A Universal Location Management System for Mobile Agents (2002)
George Samaras, Constantinos Spyrou, Evaggelia Pitoura, Marios Dikaiakos
This paper presents TRAcKER, * a distributed “location management ” middleware which has the ability to manage the location of mobile agents that travel independently the Internet in search of...
Performance evaluation of mobile-agent middleware: A hierarchical approach (2001)
Marios Dikaiakos, Melinos Kyriakou, George Samaras
Abstract. In this paper, we introduce a hierarchical framework for the quantitative performance evaluation of mobile-agent middleware platforms. This framework is established upon an abstraction of...
Benchmarking Mobile-agent Systems (2001)
Marios Dikaiakos, Melinos Kyriakou, George Samaras
In this paper, we introduce a hierarchical framework for the quantitative performance evaluation of mobile-agent middleware platforms. This framework is established upon an abstraction of the typical...
The PaCMAn Metacomputer: Parallel Computing with Java Mobile Agents (2001)
Paraskevas Evripidou George, George Samaras, Christoforos Panayiotou, Evaggelia Pitoura
The PaCMAn (Parallel Computing with Java Mobile Agents) Metacomputer launches multiple Java-mobile Agents that communicate and cooperate to solve problems in parallel. Each mobile agent can travel...
Mobile agents for World Wide Web distributed database access (2000)
Stavros Papastavrou, Student Member, George Samaras, Senior Member, Evaggelia Pitoura
AbstractÐThe popularity of the Web as a universal access mechanism for network information has created the need for developing web-based DBMS client/server applications. However, the current...
Quantitative Performance Analysis of Mobile Agent Systems: A Hierarchical Approach (2000)
Marios D. Dikaiakos, George Samaras
In this paper we propose a novel performance analysis approach that can be used to gauge quantitatively the performance characteristics of different mobile-agent platforms. We materialize this...
An Evaluation of the Java-Based Approaches to Web Database Access (2000)
Stavros Papastavrou, Panos Chrysanthis, George Samaras, Evaggelia Pitoura
Abstract. Given the undeniable popularity of the Web, providing efficient and secure access to remote databases using a Web browser is crucial for the emerging cooperative information systems and...
Mobile Agent Platforms for Web Databases: A Qualitative and Quantitative Assessment (1999)
George Samaras, Marios D. Dikaiakos, Constantinos Spyrou, Andreas Liverdos
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...
On Network Survivability Algorithms based on Trellis Graph Transformations (1999)
Graph Transformations, Soulla Louca, Andreas Pitsillides, George Samaras
Due to the wide range of services being supported, telecommunications networks are loaded with massive quantities of information. This stimulates extra concern for network survivability. In this...
Mobile Agent Procedures: Metacomputing in Java (1999)
Dimitrios Barelos, Evaggelia Pitoura, George Samaras
In this paper, we introduce Mobile Agent Procedures (MAPs) as an efficient, convenient and transparent means of utilizing available networked computational resources. MAPs are mobile remote...
DITIS: Collaborative Virtual Medical team for home healthcare of cancer patients (1999)
Andreas Pitsillides, George Samaras, Marios Dikaiakos, Eleni Christodoulou
Abstract: Complex and chronic illnesses, such as Cancer demand the use of specialist treatment protocols, administered and monitored by a co-ordinated team of professionals. Home based care of...
DITIS: Collaborative Virtual Medical team for home healthcare of cancer patients (1999)
Andreas Pitsillides, Barbara Pitsillides, George Samaras, Eleni Christodoulou, Panayiotis Andreou
Complex and chronic illnesses, such as cancer, demand the use of specialised treatment protocols, administered and monitored by a patient centric co-ordinated team of multidisciplinary healthcare...
Data Management for Mobile Computing (1998)
Evaggelia Pitoura, George Samaras
Introduction - mobile or nomadic computing - wireless - ubiquitous - personal Architecture Station Base Station Base Fixed Host Mbps to Gbps Mobile Host Host Mobile Wireless LAN cell Mobile Host 1...
Software Models for Mobile Wireless Computing (1998)
George Samaras, Evaggelia Pitoura
Introduction Restrictions [25, 7, 10, 2]: Mobility ffl System configuration is no longer static: the center of activity, the topology, the system load, and locality, change dynamically ffl need to...
Locating Objects in Mobile Computing
Evaggelia Pitoura, George Samaras
In current distributed systems, the notion of mobility is emerging in many forms and applications. Mobility arises naturally in wireless computing, since the location of users changes as they move....
Mobile Agents for WWW Distributed Database Access
Stavros Papastavrou, George Samaras, Evaggelia Pitoura
The popularity of the web as a universal access mechanism for network information has created the need for developing webbased DBMS client/server applications. However, the current commercial...
Locating Objects in Mobile Computing
Evaggelia Pitoura, George Samaras
In current distributed systems, the notion of mobility is emerging in many forms and applications. Mobility arises naturally in wireless computing, since the location of users changes as they move....