Parcourir par auteur "Loukopoulos, T."
Voici les éléments 1-20 de 22
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Adaptive schemes for distributed web caching
(2005)In distributed web caching architectures, institutional proxies take advantage of their neighbors' contents in order to reduce the number of requests forwarded to the server. Intuitively, the maximum benefit from this ... -
Agent placement in wireless embedded systems: Memory space and energy optimizations
(2010)Embedded applications can be structured in terms of mobile agents that are flexibly installed on available nodes. In wireless systems, such nodes typically have limited battery and memory resources; therefore it is important ... -
Algorithms for energy-driven agent placement in wireless embedded systems with memory constraints
(2011)The agent programming paradigm provides an easy to use framework for coding embedded applications in a pervasive environment. Under this model, applications are structured as mobile agents that can be flexibly installed ... -
Continuous replica placement schemes in distributed systems
(2005)The Replica Placement Problem (RPP) aims at creating a set of duplicated data objects across the nodes of a distributed system in order to optimize certain criteria. Typically, RPP formulations fall into two categories: ... -
Database design of a geo-environmental information system
(2014)Environmental protection from productive investments becomes a major task for enterprises and constitutes a critical competitiveness factor. The region of Central Greece presents many serious and particular environmental ... -
Distributed Online Algorithms for the Agent Migration Problem in WSNs
(2013)The mobile agent paradigm has been adopted by several systems in the area of wireless sensor networks as it enables a flexible distribution and placement of application components on nodes, at runtime. Most agent placement ... -
Formal model and scheduling heuristics for the replica migration problem
(2008)Replication of the most popular objects is often used in distributed data provision systems to reduce access time and improve availability. In fact, a given replica placement scheme may have to be redefined as object ... -
GRAL: A grouping algorithm to optimize application placement in wireless embedded systems
(2011)Recent embedded middleware initiatives enable the structuring of an application as a set of collaborating agents deployed in the various sensing/actuating entities of the system. Of particular importance is the incurred ... -
Implementing replica placements: Feasibility and cost minimization
(2007)Given two replication schemes Xold and Xnew, the Replica Transfer Scheduling Problem (RTSP) aims at reaching Xnew, starting from Xold, with minimal implementation cost. In this paper we generalize the problem description ... -
Improved genetic algorithms and list scheduling techniques for independent task scheduling in distributed systems
(2007)Given a set of tasks with certain characteristics, e.g., data size, estimated execution time and a set of processing nodes with their own parameters, the goal of task scheduling is to allocate tasks at nodes so that the ... -
Improving application availability in wireless sensor networks with energy-harvesting capability
(2012)We assume a wireless sensor and actuator network with nodes that can harvest energy from the environment, and an application deployed in this network, which is structured as a set of cooperating mobile components that can ... -
Introducing agent evictions to improve application placement in wireless distributed systems
(2012)With the development of mobile code frameworks for embedded systems, an application can be structured as a set of cooperating components (agents) that are placed on the nodes of the system in a flexible way. Reducing the ... -
Investigating the replica transfer scheduling problem
(2006)The Replica Placement Problem (RPP) aims at selecting the nodes for duplicating data objects in order to optimize their access. Even though a lot of work already exists on RPP, the issue of implementing the resulting ... -
Middleware mechanisms for agent mobility in wireless sensor and actuator networks
(2012)This paper describes middleware-level support for agent mobility, targeted at hierarchically structured wireless sensor and actuator network applications. Agent mobility enables a dynamic deployment and adaptation of the ... -
On deploying tree structured agent applications in networked embedded systems
(2010)Given an application structured as a set of communicating mobile agents and a set of wireless nodes with sensing/actuating capabilities and agent hosting capacity constraints, the problem of deploying the application ... -
On minimizing the resource consumption of cloud applications using process migrations
(2013)According to the pay-per-use model adopted in clouds, the more resources an application running in a cloud computing environment consumes, the greater the amount of money the owner of the corresponding application will be ... -
On reconfiguring embedded application placement on smart sensing and actuating environments
(2011)In a smart home environment appliances and objects have sensing, actuating and wireless communication capabilities. Recent embedded middleware initiatives aim at providing an easy to use programming framework for developing ... -
Policies for caching OLAP queries in Internet proxies
(2006)The Internet now offers more than just simple information to the users. Decision makers can now issue analytical, as opposed to transactional, queries that involve massive data (such as, aggregations of millions of rows ... -
Scheduling independent tasks in heterogeneous environments under communication constraints
(2006)With the advent of the Grid, task scheduling in heterogeneous environments becomes more and more important. Of particular interest is the fact that especially in scientific experiments a non negligible amount of data must ... -
Single and Group Agent Migration: Algorithms, Bounds, and Optimality Issues
(2014)Recent embedded middleware platforms enable the structuring of an application as a set of collaborating agents deployed on various nodes of the underlying wireless sensor network (WSN). Of particular importance is the ...