Athens University of Economics and Business

Displaying 1-40 of 69 results

  • White Papers // Apr 2014

    Efficient Proactive Caching for Supporting Seamless Mobility

    The authors present a distributed proactive caching approach that exploits user mobility information to decide where to proactively cache data to support seamless mobility, while efficiently utilizing cache storage using a congestion pricing scheme. The proposed approach is applicable to the case where objects have different sizes and to a...

    Provided By Athens University of Economics and Business

  • White Papers // Sep 2013

    Return on Security Investment for Cloud Platforms

    Cloud migration is a complex decision because of the multiple parameters that contribute for or against it (e.g. available budget, costs, performance, etc.). One of these parameters is information security and the investment required in order to ensure it. A potential client needs to evaluate various deployment options and Cloud...

    Provided By Athens University of Economics and Business

  • White Papers // Jan 2013

    On the Feasibility of Malware Attacks in Smartphone Platforms

    Smartphone's are multipurpose devices that host multiple and heterogeneous data. Their user base is constantly increasing and as a result they have become an attractive target for conducting privacy and security attacks. The attacks' impact increases, when Smartphone users tend to use their devices both for personal and business purposes....

    Provided By Athens University of Economics and Business

  • White Papers // Jan 2013

    Smartphone Security Evaluation - The Malware Attack Case

    The adoption of Smartphone's, devices transforming from simple communication devices to 'smart' and multipurpose devices, is constantly increasing. Amongst the main reasons are their small size, their enhanced functionality and their ability to host many useful and attractive applications. However, this vast use of mobile platforms makes them an attractive...

    Provided By Athens University of Economics and Business

  • White Papers // Dec 2012

    Lossless Data Compression at Finite Blocklengths

    This paper provides an extensive study of the behavior of the best achievable rate (and other related fundamental limits) in variable-length lossless compression. In the non-asymptotic regime, the fundamental limits of fixed-to-variable lossless compression with and without prefix constraints are shown to be tightly coupled. Several precise, quantitative bounds are...

    Provided By Athens University of Economics and Business

  • White Papers // Nov 2012

    Delegate the Smartphone User? Security Awareness in Smartphone Platforms

    Smartphone users increasingly download and install third-party applications from official application repositories. Attackers may use this centralized application delivery architecture as a security and privacy attack vector. This risk increases since application vetting mechanisms are often not in place and the user is delegated to authorize which functionality and protected...

    Provided By Athens University of Economics and Business

  • White Papers // Oct 2012

    Towards Secure and Context-Aware Information Lookup for the Internet of Things

    The Internet of Things (IoT) is receiving more and more attention from the research community. The opportunities it creates for new services make it an intriguing technological step. Based on this paradigm, objects (things) become recognizable and gain intelligence by exchanging information with their environment or by having access to...

    Provided By Athens University of Economics and Business

  • White Papers // May 2012

    Caching and Mobility Support in a Publish-Subscribe Internet Architecture

    The Internet is straining to meet demands that its design had never anticipated, such as supporting billions of mobile devices and transporting huge amounts of multimedia content. The Publish-Subscribe Internet (PSI) architecture, a clean slate Information Centric Networking approach for the Future Internet, was designed to satisfy the current and...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    Towards Adaptable Security for Energy Efficiency in Wireless Sensor Networks

    Modern sensors are portable, embeddable, they offer multiple connectivity options and enough processing power that allows the performance of advanced operations. Multiple sensors can be used together forming a Wireless Sensor Network (WSN). Ubiquitous WSNs are expected to play a significant role in the future, assisting users in their everyday...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    Realistic Media Streaming Over BitTorrent

    While BitTorrent was originally conceived as a Peer-to-Peer file exchange protocol, it has proved extremely successful for asynchronous content distribution, allowing content sources to support huge numbers of users with a modest amount of bandwidth. This has prompted many researchers to study the possibility of using BitTorrent to support real-time...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    On Inter-Domain Name Resolution for Information-Centric Networks

    Information-Centric Networking (ICN) is a paradigm that aims to better reflect current Internet usage patterns by focusing on information, rather than on hosts. One of the most critical ICN functionalities is the efficient resolution/location of information objects i.e., name resolution. The vast size of the information object namespace calls for...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    GlobeTraff: A Traffic Workload Generator for the Performance Evaluation of Future Internet Architectures

    Having identified important limitations of the current Internet architecture, several research initiatives have engaged in the design of new architectures for the Internet of the Future. New features and protocols are designed, and in many cases, a clean slate approach is followed, advocating the replacement of almost the entire current...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    A Comparison of Streaming Extensions to BitTorrent

    Peer-To-Peer (P2P) protocols have been widely accepted by users and operators alike as efficient mechanisms for non real-time content distribution. It is therefore reasonable to extend these protocols to also handle more demanding applications, such as multimedia streaming. Many researchers have proposed modifications to the well known BitTorrent protocol in...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    Towards Exploiting User-Centric Information for Proactive Caching in Mobile Networks

    An important direction in mobile and wireless networks is how to track, understand and leverage a users' context, preferences, and behavior in order to improve the quality of service offered by the network and experienced by users. The current extended abstract investigates how a users' information requests and mobility behavior...

    Provided By Athens University of Economics and Business

  • White Papers // Mar 2012

    Power Control Under Best Response Dynamics for Interference Mitigation in a Two-Tier Femtocell Network

    Femtocell networks are about to be extensively deployed with the aim of providing substantial improvements to cellular coverage and capacity. However, their deployment is nontrivial because of the extra interference that the femtocell nodes cause to the macrocell nodes with which they share the same portion of the spectrum. This...

    Provided By Athens University of Economics and Business

  • White Papers // Mar 2012

    Fighting Phishing the Information-Centric Way

    Recent research efforts have highlighted the role of information as key target future network architectures. These so-called information centric networks base their operation on the information itself, rather than on other aspects or entities of the architecture, such as location, host, or user identity. In this paper, the authors apply...

    Provided By Athens University of Economics and Business

  • White Papers // Nov 2011

    Context-Aware Information Delivery in Assistive Environments Over a Publish-Subscribe Internet

    Future Internet technologies are offering new capabilities for service and data delivery. The authors present the potential for enabling the context-aware content adaptation and specialized delivery of healthcare information of the Publish-Subscribe Internetworking (PSI) Future Internet architecture. The Information-Centric Networking paradigm of PSI brings information at the center of the...

    Provided By Athens University of Economics and Business

  • White Papers // Oct 2011

    H-Pastry: An Adaptive Multi-Level Overlay Inter-Network

    Overlay networks are widely used for locating and disseminating information, by means of custom routing and forwarding on top of the underlying network. Distributed Hash Table (DHT) based overlays provide flexibility coupled with good scalability and load balancing properties. However, this comes at the cost of inefficient routing, caused by...

    Provided By Athens University of Economics and Business

  • White Papers // Aug 2011

    Mobility Work Re-Visited Not Considered Harmful

    The Internet is a universal source of information for its users. However, obtaining desired content has become the main focus of interest rather than the communication with machine endpoints. The increased availability of mobile devices makes such desired access continuous in time and space, adding an extra dimension and level...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2011

    VoPSI: Voice Over a Publish-Subscribe Internetwork

    Information-centric networking constitutes an alternative to the conventional, IP-based internetworking, with information being identified rather than the host where it resides (which is the case for IP networking). This approach appears to be very promising for the next generation Internet. However, many challenges and critical issues remain to be addressed,...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2011

    Bootstrapping a Publish/Subscribe Information Centric Network

    In this paper, the authors focus on the bootstrap operation of a publish/subscribe information centric network. They consider a set of interconnected network nodes and describe how they organize themselves into a fully functional network by publishing and subscribing to control plane information. Network bootstrap includes establishing point-to-point communication between...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2011

    Support of Multiple Content Variants in the Multimedia Broadcast/Multicast Service

    The Multimedia Broadcast/Multicast Service (MBMS) was designed to enable the mass distribution of multimedia content in 3rd Generation and beyond cellular networks. If such services are to become commercially viable, they must be able to efficiently support widely heterogeneous user requirements, for example, due to terminal limitations and cost constraints....

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2011

    DHTbd: A Reliable Block-Based Storage System for High Performance Clusters

    Large, reliable and efficient storage systems are becoming increasingly important in enterprise environments. The authors' research in storage system design is oriented towards the exploitation of commodity hardware for building a high performance, resilient and scalable storage system. They present the design and implementation of DHTbd, a general purpose decentralized...

    Provided By Athens University of Economics and Business

  • White Papers // May 2011

    Managing Security Issues

    Security is coming more and more in the spotlight of today's news. Several reasons have lead to this, like the maturity of computer technology, which gave access to more people to computer systems, and the evolution of the internet and computer networking in general. Security, as most technology issues, doesn't...

    Provided By Athens University of Economics and Business

  • White Papers // May 2011

    A Selective Neighbor Caching Approach for Supporting Mobility in Publish/Subscribe Networks

    The authors present a selective neighbor caching approach for sup-porting mobility in publish/subscribe networks. According to the approach, a mobile's subscriptions are transmitted to a subset of brokers that are neighbors of the current broker that the mobile is connected to. Their key contribution is the definition of a target...

    Provided By Athens University of Economics and Business

  • White Papers // May 2011

    Optimizing the Channel Load Reporting Process in IEEE 802.11k-Enabled WLANs

    IEEE 802.11k is an extension of the IEEE 802.11 specification for radio resource measurements. In an IEEE 802.11k-enabled wireless LAN, an access point or other network element may request from a client or another access point to monitor and report the load of a channel. The authors call the latter...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2011

    Supporting Mobility in a Publish Subscribe Internetwork Architecture

    The current Internet architecture is based on End-to-End point (E2E) communication, covering the needs of the time when it was designed. The former is widely considered as the root cause of many of its limitations and inefficiencies. Add-on solutions such as NATs, CDNs or Mobile IP were introduced in order...

    Provided By Athens University of Economics and Business

  • White Papers // Mar 2011

    Utility-Based Power Control for Interference Mitigation in a Mixed Femtocell-Macrocell Environment

    Femtocell networks are about to be deployed for the improvements in the cellular coverage and capacity. However, this deployment is non trivial (mainly) because of the extra interference that they cause to the macrocell users that share the same portion of the spectrum. This paper proposes a non cooperative power...

    Provided By Athens University of Economics and Business

  • White Papers // Feb 2011

    Distributed Knowledge Discovery With Non Linear Dimensionality Reduction

    Data mining tasks results are usually improved by reducing the dimensionality of data. This improvement however is achieved harder in the case that data lay on a non linear manifold and are distributed across network nodes. Although numerous algorithms for distributed dimensionality reduction have been proposed, all assume that data...

    Provided By Athens University of Economics and Business

  • White Papers // Feb 2011

    Negotiation-Based Distributed Power Control in Wireless Networks With Autonomous Nodes

    The efficient management of the radio spectrum is a key functionality in every type of wireless network. Wireless nodes generally have heterogeneous QoS targets, which sometimes cannot be satisfied for all of them due to the high interference levels that frequently arise, even in sparse topologies. In this paper, the...

    Provided By Athens University of Economics and Business

  • White Papers // Feb 2011

    Cognitive WMNs: A Distributed Mechanism for Leasing Cellular Network Bandwidth

    The authors study flow optimization in cognitive Wireless Mesh Networks (WMN) that do not possess any bandwidth of their own, but rather judiciously lease bandwidth from a collocated Cellular Network (CN). They develop a distributed mechanism that such WMNs can use to optimize their traffic given their own traffic needs...

    Provided By Athens University of Economics and Business

  • White Papers // Dec 2010

    Flow Optimization in Delay Tolerant Networks Using Dual Decomposition

    The authors study flow optimization in Delay Tolerant Networks (DTNs), i.e., networks where the average delay in the delivery of a data packet is on the order of the time it takes the topology to change substantially. Although their work is applicable to all DTNs, it is geared towards Wireless...

    Provided By Athens University of Economics and Business

  • White Papers // Dec 2010

    Robust Client-Based Wi-Fi Topology Discovery

    The low cost and ease of installation of Wi-Fi equipment operating in unlicensed spectrum have made dense Wi-Fi deployments a reality in most modern urban areas. With the lack of many non-overlapping frequencies to operate on, interference among neighbor Wi-Fi cells can cause significant performance degradation. Here, the authors study...

    Provided By Athens University of Economics and Business

  • White Papers // Oct 2010

    Publish-Subscribe Internetworking Security Aspects

    The Publish-Subscribe paradigm has been in the spotlight of recent research efforts. Its information oriented nature, the decoupling it offers between information providers and information consumers as well as its location-identity split properties, have inspired a variety of - mainly overlay - architectures that focus on multicast, mobility, indirection as...

    Provided By Athens University of Economics and Business

  • White Papers // Oct 2010

    Grid Economics and Business: Meeting the Challenges

    The technological advantages of a new technology, let alone, cannot quarantine its widespread adoption. The economic, business and legal factors should not be underestimated but rather examined cautiously together with the technological context. Based on this statement, this paper presents a number of valuable conclusions and hands-on advice for new...

    Provided By Athens University of Economics and Business

  • White Papers // Jul 2010

    Misbehavior Scenarios in Cognitive Radio Networks

    Recent advances in the fields of Cognitive Radio and the proliferation of open spectrum access promise that spectrum-agile wireless communication will be widespread in the near future, and will bring significant flexibility and potential utility improvements for end users. With spectrum efficiency being a key objective, most relevant research focuses...

    Provided By Athens University of Economics and Business

  • White Papers // Jul 2010

    Report-Based Topology Discovery Schemes for Centrally-Managed Wi-Fi Deployments

    The density of IEEE 802.11 Wireless Local Area Networks, especially in metropolitan areas, has resulted in almost ubiquitous wireless presence in such environments. Apart from the benefits of increased wireless coverage, though, uncontrolled WLAN deployment has brought to attention interference issues among neighbor wireless networks. Combating interference has become one...

    Provided By Athens University of Economics and Business

  • White Papers // Jul 2010

    Design and Evaluation of a Socket Emulator for Publish/Subscribe Networks

    In order for a Future Internet architecture to be globally deployed, it must ensure that existing applications will continue to operate efficiently on top of it. As part of the Publish Subscribe Internet Routing Paradigm (PSIRP) project, the authors have explored various options for making endpoint centric applications based on...

    Provided By Athens University of Economics and Business

  • White Papers // Jul 2010

    Security Aspects of a Clean Slate Information Oriented Internet Architecture

    Publish/Subscribe is a paradigm that continuously receives increasing attention by the research community, mainly due to its information oriented nature. The PSIRP (Publish-Subscribe Internet Routing Paradigm) project aims at developing and evaluating a clean slate architecture for the future Internet, based on this paradigm. Availability, security, and mobility, are considered...

    Provided By Athens University of Economics and Business

  • White Papers // Jul 2010

    Developing Information Networking Further: From PSIRP to PURSUIT

    PSIRP (Publish-Subscribe Internet Routing Paradigm) is an EU FP7 funded project that has developed a clean-slate architecture for the future Internet, based on the publish-subscribe primitives (rather than the send-receive ones), all the way down to the core networking functions. The PSIRP vision is a pure information-centric Internet architecture, possibly...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2014

    Efficient Proactive Caching for Supporting Seamless Mobility

    The authors present a distributed proactive caching approach that exploits user mobility information to decide where to proactively cache data to support seamless mobility, while efficiently utilizing cache storage using a congestion pricing scheme. The proposed approach is applicable to the case where objects have different sizes and to a...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2009

    The GridEcon Platform: A Business Scenario Testbed for Commercial Cloud Services

    This paper presents the GridEcon Platform, a testbed for designing and evaluating economics-aware services in a commercial Cloud computing setting. The Platform is based on the idea that the exact working of such services is difficult to predict in the context of a market and, therefore, an environment for evaluating...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2009

    Quality Classifiers for Open Source Software Repositories

    Open Source Software (OSS) often relies on large repositories, like SourceForge, for initial incubation. The OSS repositories offer a large variety of meta-data providing interesting information about projects and their success. In this paper the authors propose a data mining approach for training classifiers on the OSS metadata provided by...

    Provided By Athens University of Economics and Business

  • White Papers // May 2009

    Alitheia Core: An Extensible Software Quality Monitoring Platform

    Research in the fields of software quality and maintainability requires the analysis of large quantities of data, which often originate from open source software projects. Pre-processing data, calculating metrics, and synthesizing composite results from a large corpus of project artifacts are a tedious and error prone task lacking direct scientific...

    Provided By Athens University of Economics and Business

  • White Papers // Jul 2010

    Interference-Aware Channel Assignment in a Metropolitan Multi-Radio Wireless Mesh Network With Directional Antennas

    The authors investigate the problem of channel assignment in a metropolitan multi-radio wireless mesh network with directional antennas. Their contributions include a new conflict graph model for capturing the interference between links in a mesh network with a known wireless interface communication graph, and a new channel assignment procedure which...

    Provided By Athens University of Economics and Business

  • White Papers // Jul 2010

    Automatic Channel Assignment and Topology Optimization in Multi-Radio Wireless Mesh Networks

    Wireless mesh networks, comprised of nodes with multiple radio interfaces, are a promising technology for broadband residential Internet access or to provide connectivity for data transfer. In order to simplify network deployment, auto-configuration procedures that provide automatic network start-up, with minimum manual configuration of nodes, are increasingly important. In order...

    Provided By Athens University of Economics and Business

  • White Papers // May 2011

    Optimizing the Channel Load Reporting Process in IEEE 802.11k-Enabled WLANs

    IEEE 802.11k is an extension of the IEEE 802.11 specification for radio resource measurements. In an IEEE 802.11k-enabled wireless LAN, an access point or other network element may request from a client or another access point to monitor and report the load of a channel. The authors call the latter...

    Provided By Athens University of Economics and Business

  • White Papers // May 2009

    Efficient Range Query Processing in Metric Spaces Over Highly Distributed Data

    Similarity search in P2P systems has attracted a lot of attention recently and several important applications, like distributed image search, can profit from the proposed distributed algorithms. In this paper, the authors address the challenging problem of efficient processing of range queries in metric spaces, where data is horizontally distributed...

    Provided By Athens University of Economics and Business

  • White Papers // Feb 2011

    Cognitive WMNs: A Distributed Mechanism for Leasing Cellular Network Bandwidth

    The authors study flow optimization in cognitive Wireless Mesh Networks (WMN) that do not possess any bandwidth of their own, but rather judiciously lease bandwidth from a collocated Cellular Network (CN). They develop a distributed mechanism that such WMNs can use to optimize their traffic given their own traffic needs...

    Provided By Athens University of Economics and Business

  • White Papers // Dec 2010

    Flow Optimization in Delay Tolerant Networks Using Dual Decomposition

    The authors study flow optimization in Delay Tolerant Networks (DTNs), i.e., networks where the average delay in the delivery of a data packet is on the order of the time it takes the topology to change substantially. Although their work is applicable to all DTNs, it is geared towards Wireless...

    Provided By Athens University of Economics and Business

  • White Papers // May 2012

    Caching and Mobility Support in a Publish-Subscribe Internet Architecture

    The Internet is straining to meet demands that its design had never anticipated, such as supporting billions of mobile devices and transporting huge amounts of multimedia content. The Publish-Subscribe Internet (PSI) architecture, a clean slate Information Centric Networking approach for the Future Internet, was designed to satisfy the current and...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    Towards Adaptable Security for Energy Efficiency in Wireless Sensor Networks

    Modern sensors are portable, embeddable, they offer multiple connectivity options and enough processing power that allows the performance of advanced operations. Multiple sensors can be used together forming a Wireless Sensor Network (WSN). Ubiquitous WSNs are expected to play a significant role in the future, assisting users in their everyday...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    Realistic Media Streaming Over BitTorrent

    While BitTorrent was originally conceived as a Peer-to-Peer file exchange protocol, it has proved extremely successful for asynchronous content distribution, allowing content sources to support huge numbers of users with a modest amount of bandwidth. This has prompted many researchers to study the possibility of using BitTorrent to support real-time...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    On Inter-Domain Name Resolution for Information-Centric Networks

    Information-Centric Networking (ICN) is a paradigm that aims to better reflect current Internet usage patterns by focusing on information, rather than on hosts. One of the most critical ICN functionalities is the efficient resolution/location of information objects i.e., name resolution. The vast size of the information object namespace calls for...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    GlobeTraff: A Traffic Workload Generator for the Performance Evaluation of Future Internet Architectures

    Having identified important limitations of the current Internet architecture, several research initiatives have engaged in the design of new architectures for the Internet of the Future. New features and protocols are designed, and in many cases, a clean slate approach is followed, advocating the replacement of almost the entire current...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    Towards Exploiting User-Centric Information for Proactive Caching in Mobile Networks

    An important direction in mobile and wireless networks is how to track, understand and leverage a users' context, preferences, and behavior in order to improve the quality of service offered by the network and experienced by users. The current extended abstract investigates how a users' information requests and mobility behavior...

    Provided By Athens University of Economics and Business

  • White Papers // Mar 2012

    Fighting Phishing the Information-Centric Way

    Recent research efforts have highlighted the role of information as key target future network architectures. These so-called information centric networks base their operation on the information itself, rather than on other aspects or entities of the architecture, such as location, host, or user identity. In this paper, the authors apply...

    Provided By Athens University of Economics and Business

  • White Papers // Mar 2012

    Power Control Under Best Response Dynamics for Interference Mitigation in a Two-Tier Femtocell Network

    Femtocell networks are about to be extensively deployed with the aim of providing substantial improvements to cellular coverage and capacity. However, their deployment is nontrivial because of the extra interference that the femtocell nodes cause to the macrocell nodes with which they share the same portion of the spectrum. This...

    Provided By Athens University of Economics and Business

  • White Papers // Nov 2011

    Context-Aware Information Delivery in Assistive Environments Over a Publish-Subscribe Internet

    Future Internet technologies are offering new capabilities for service and data delivery. The authors present the potential for enabling the context-aware content adaptation and specialized delivery of healthcare information of the Publish-Subscribe Internetworking (PSI) Future Internet architecture. The Information-Centric Networking paradigm of PSI brings information at the center of the...

    Provided By Athens University of Economics and Business

  • White Papers // May 2011

    A Selective Neighbor Caching Approach for Supporting Mobility in Publish/Subscribe Networks

    The authors present a selective neighbor caching approach for sup-porting mobility in publish/subscribe networks. According to the approach, a mobile's subscriptions are transmitted to a subset of brokers that are neighbors of the current broker that the mobile is connected to. Their key contribution is the definition of a target...

    Provided By Athens University of Economics and Business

  • White Papers // Aug 2011

    Mobility Work Re-Visited Not Considered Harmful

    The Internet is a universal source of information for its users. However, obtaining desired content has become the main focus of interest rather than the communication with machine endpoints. The increased availability of mobile devices makes such desired access continuous in time and space, adding an extra dimension and level...

    Provided By Athens University of Economics and Business

  • White Papers // Oct 2010

    Publish-Subscribe Internetworking Security Aspects

    The Publish-Subscribe paradigm has been in the spotlight of recent research efforts. Its information oriented nature, the decoupling it offers between information providers and information consumers as well as its location-identity split properties, have inspired a variety of - mainly overlay - architectures that focus on multicast, mobility, indirection as...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2011

    DHTbd: A Reliable Block-Based Storage System for High Performance Clusters

    Large, reliable and efficient storage systems are becoming increasingly important in enterprise environments. The authors' research in storage system design is oriented towards the exploitation of commodity hardware for building a high performance, resilient and scalable storage system. They present the design and implementation of DHTbd, a general purpose decentralized...

    Provided By Athens University of Economics and Business

  • White Papers // Oct 2011

    H-Pastry: An Adaptive Multi-Level Overlay Inter-Network

    Overlay networks are widely used for locating and disseminating information, by means of custom routing and forwarding on top of the underlying network. Distributed Hash Table (DHT) based overlays provide flexibility coupled with good scalability and load balancing properties. However, this comes at the cost of inefficient routing, caused by...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2012

    A Comparison of Streaming Extensions to BitTorrent

    Peer-To-Peer (P2P) protocols have been widely accepted by users and operators alike as efficient mechanisms for non real-time content distribution. It is therefore reasonable to extend these protocols to also handle more demanding applications, such as multimedia streaming. Many researchers have proposed modifications to the well known BitTorrent protocol in...

    Provided By Athens University of Economics and Business

  • White Papers // Apr 2011

    Supporting Mobility in a Publish Subscribe Internetwork Architecture

    The current Internet architecture is based on End-to-End point (E2E) communication, covering the needs of the time when it was designed. The former is widely considered as the root cause of many of its limitations and inefficiencies. Add-on solutions such as NATs, CDNs or Mobile IP were introduced in order...

    Provided By Athens University of Economics and Business

  • White Papers // Mar 2011

    Utility-Based Power Control for Interference Mitigation in a Mixed Femtocell-Macrocell Environment

    Femtocell networks are about to be deployed for the improvements in the cellular coverage and capacity. However, this deployment is non trivial (mainly) because of the extra interference that they cause to the macrocell users that share the same portion of the spectrum. This paper proposes a non cooperative power...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2011

    VoPSI: Voice Over a Publish-Subscribe Internetwork

    Information-centric networking constitutes an alternative to the conventional, IP-based internetworking, with information being identified rather than the host where it resides (which is the case for IP networking). This approach appears to be very promising for the next generation Internet. However, many challenges and critical issues remain to be addressed,...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2011

    Bootstrapping a Publish/Subscribe Information Centric Network

    In this paper, the authors focus on the bootstrap operation of a publish/subscribe information centric network. They consider a set of interconnected network nodes and describe how they organize themselves into a fully functional network by publishing and subscribing to control plane information. Network bootstrap includes establishing point-to-point communication between...

    Provided By Athens University of Economics and Business

  • White Papers // Feb 2011

    Negotiation-Based Distributed Power Control in Wireless Networks With Autonomous Nodes

    The efficient management of the radio spectrum is a key functionality in every type of wireless network. Wireless nodes generally have heterogeneous QoS targets, which sometimes cannot be satisfied for all of them due to the high interference levels that frequently arise, even in sparse topologies. In this paper, the...

    Provided By Athens University of Economics and Business

  • White Papers // May 2009

    Efficient Search based on Content Similarity over Self-Organizing P2P Networks

    The advent of the World Wide Web has made an enormous amount of information available to everyone and the widespread use of digital equipment enables end-users (peers) to produce their own digital content. This vast amount of information requires scalable data management systems. Peer-To-Peer (P2P) systems have so far been...

    Provided By Athens University of Economics and Business

  • White Papers // Jun 2010

    Enhancing Clustering Quality through Landmark-based Dimensionality Reduction

    Scaling up data mining algorithms for data of both high dimensionality and cardinality has been lately recognized as one of the most challenging problems in data mining research. The reason is that typical data mining tasks, such as clustering, cannot produce high quality results when applied on high-dimensional and/or large...

    Provided By Athens University of Economics and Business

  • White Papers // Nov 2008

    Distributed Semantic Overlay Networks

    Semantic Overlay Networks (SONs) have been recently proposed as a way to organize content in Peer-To-Peer (P2P) networks. The main objective is to discover peers with similar content and then form thematically focused peer groups. Efficient content retrieval can be performed by having queries selectively forwarded only to relevant groups...

    Provided By Athens University of Economics and Business

  • White Papers // Jan 2009

    FEDRA: A Fast and Efficient Dimensionality Reduction Algorithm

    Contemporary data-intensive applications generate large datasets of very high dimensionality. Data management in high-dimensional spaces presents problems, such as the degradation of query processing performance, a phenomenon also known as the curse of dimensionality. Dimensionality Reduction (DR) tackles this problem, by efficiently embedding data from high dimensional to lower dimensional...

    Provided By Athens University of Economics and Business

  • White Papers // Aug 2008

    Software as a Service (SaaS) Through a Grid Network: Business and Legal Implications and Challenges

    The paper will approach the topic of the provision of SaaS in a Grid environment in light of the experience gained by the authors as business and legal consultants within BEinGRID project. In particular, starting from the analysis of 18 real business cases, some sensitive issues will be addressed, like...

    Provided By Athens University of Economics and Business

  • White Papers // Oct 2010

    Grid Economics and Business: Meeting the Challenges

    The technological advantages of a new technology, let alone, cannot quarantine its widespread adoption. The economic, business and legal factors should not be underestimated but rather examined cautiously together with the technological context. Based on this statement, this paper presents a number of valuable conclusions and hands-on advice for new...

    Provided By Athens University of Economics and Business

  • White Papers // Sep 2008

    BEinGRID: Development of Business Models for the Grid Industry

    Newest market research studies report a growing awareness for the potential of grid technology by industry and increased interest for utility computing and grid solutions for business application. This trend has been in particular enforced by well established Internet companies as for example WebEx, Amazon, AOL, who offer their services...

    Provided By Athens University of Economics and Business

  • White Papers // Aug 2008

    Defining Efficient Business Models for Grid-Enabled Applications

    Driven by the increasing demand, Grid technology is entering the business market in form of utility computing, Grid middleware and Grid-enabled applications. However, the business market is interested in complete Grid solutions. Thus, a successful take up of Grid technology on the business market requires the establishment of Grid value...

    Provided By Athens University of Economics and Business

  • White Papers // Jan 2007

    Entrepreneurial Orientation of SMEs, Product Innovativeness, and Performance

    This paper looks beyond the Entrepreneurial Orientation (EO)-performance link and focuses on identifying EO profiles of SMEs to suggest variations in product innovativeness dimensions of different performance potential. Based upon a sample of 149 manufacturing companies, the paper identifies two opposite groups with the help of a cluster analysis, namely...

    Provided By Athens University of Economics and Business

  • White Papers // Nov 2006

    A Web-Based ERP System for Business Services and Supply Chain Management: Application to Real-World Process Scheduling

    A Web-based ERP system developed for attacking business problems and managing real-world business processes ranging from simple office automation procedures to complicated supply chain planning is presented. The system's Web-aspect provides significant advantages, as the system is distributed through interoperable, cross-platform and highly pluggable Web-service components. The system involves a...

    Provided By Athens University of Economics and Business