• Article  

      Caching techniques on CDN simulated frameworks 

      Stamos, Kostas; Pallis, George C.; Vakali, Athena I. (2008)
    • Article  

      CDNs content outsourcing via generalized communities 

      Katsaros, Dimitrios S.; Pallis, George C.; Stamos, Kostas; Vakali, Athena I.; Sidiropoulos, Antonis; Manolopoulos, Yannis (2009)
      Content distribution networks (CDNs) balance costs and quality in services related to content delivery. Devising an efficient content outsourcing policy is crucial since, based on such policies, CDN providers can provide ...
    • Article  

      CDNsim: A simulation tool for content distribution networks 

      Stamos, Kostas; Pallis, George C.; Vakali, Athena I.; Katsaros, Dimitrios S.; Sidiropoulos, Antonis; Manolopoulos, Yannis (2010)
      Content distribution networks (CDNs) have gained considerable attention in the past few years. Hence there is need for developing frameworks for carrying out CDN simulations. In this article we present a modeling and ...
    • Article  

      Cloud computing [Guest Editorial] 

      Katsaros, Dimitrios S.; Pallis, George C.; Sivasubramanian, S.; Vakali, Athena I. (2011)
    • Article  

      Cloud computing: Distributed internet computing for IT and scientific research 

      Dikaiakos, Marios D.; Katsaros, Dimitrios S.; Mehra, P.; Pallis, George C.; Vakali, Athena I. (2009)
      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 ...
    • Book Chapter  

      Clustering web information sources 

      Vakali, Athena I.; Pallis, George C.; Angelis, Lefteris (IGI Global, 2008)
      The explosive growth of the Web scale has drastically increased information circulation and dissemination rates. As the number of both Web users and Web sources grows significantly everyday, crucial data management issues, ...
    • Book Chapter  

      Clustering web information sources 

      Vakali, Athena I.; Pallis, George C.; Angelis, Lefteris (IGI Global, 2006)
      The explosive growth of the Web has drastically increased information circulation and dissemination rates. As the numbers of both Web users and Web sources grow significantly every day, crucial data management issues, such ...
    • Article  

      A clustering-based prefetching scheme on a Web cache environment 

      Pallis, George C.; Vakali, Athena I.; Pokorný, Jaroslav (2008)
      Web prefetching is an attractive solution to reduce the network resources consumed by Web services as well as the access latencies perceived by Web users. Unlike Web caching, which exploits the temporal locality, Web ...
    • Conference Object  

      Content classification for caching under CDNs 

      Pallis, George C.; Thomos, Charilaos; Stamos, Kostas; Vakali, Athena I.; Andreadis, Georgios (2008)
      Content Delivery Networks (CDNs) provide an efficient support for serving "resource-hungry" applications while minimizing the network impact of content delivery as well as shifting the traffic away from overloaded origin ...
    • Article  

      Content Delivery Networks: Status and Trends 

      Vakali, Athena I.; Pallis, George C. (2003)
      An insight into the content delivery networks (CDN) architecture and popular CDN service providers is performed. CDNs improve network performance and offer fast and reliable applications and services by distributing content ...
    • Article  

      Editorial for special issue Internet-based Content Delivery 

      Fortino, G.; Mastroianni, C.; Pallis, George C.; Pathan, M.; Vakali, Athena I. (2011)
      The main technical underpinnings of Cloud Computing infrastructures and services include virtualization, service-orientation, elasticity, multi-tenancy, power efficiency, and economics of scale. The perceived advantages ...
    • Conference Object  

      Evaluating the utility of content delivery networks 

      Stamos, Kostas; Vakali, Athena I.; Pallis, George C.; Dikaiakos, Marios D. (2009)
      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 ...
    • Conference Object  

      FRES-CAR: An adaptive cache replacement policy 

      Pallis, George C.; Vakali, Athena I.; Sidiropoulos, E. (2005)
      Caching Web objects has become a common practice towards improving content delivery and users' servicing. A Web caching framework is characterized by its cache replacement policy, which identifies the objects (i.e. the ...
    • Article  

      Insight and perspectives for Content Delivery Networks 

      Pallis, George C.; Vakali, Athena I. (2006)
      Content delivery over the Web has become an important element of improving web performance. Content delivery Networks (CDN) has been proposed to maximize bandwidth, improve accessibility, and maintain correctness through ...
    • Article  

      Integrating caching techniques in CDNs using a classification approach 

      Pallis, George C.; Stamos, Kostas; Vakali, Athena I.; Thomos, Charilaos; Andreadis, Georgios (2008)
      Content Delivery Networks (CDNs) provide an efficient support for serving "resource-hungry" applications while minimizing the network impact of content delivery as well as shifting the traffic away from overloaded origin ...
    • Article  

      Integrating caching techniques on a content distribution network 

      Stamos, Kostas; Pallis, George C.; Vakali, Athena I. (2006)
      Web caching and replication tune capacity with performance and they have become essential components of the Web. In practice, caching and replication techniques have been applied in proxy servers and Content Distribution ...
    • Conference Object  

      A latency-based object placement approach in content distribution networks 

      Pallis, George C.; Vakali, Athena I.; Stamos, Kostas; Sidiropoulos, Antonis; Katsaros, Dimitrios S.; Manolopoulos, Yannis (2005)
      Content Distribution Networks (CDNs) are increasingly being used to disseminate data in today's Internet. The growing interest in CDNs is motivated by a common problem across disciplines: how does one reduce the load on ...
    • Article  

      Model-based cluster analysis for Web users sessions 

      Pallis, George C.; Angelis, Lefteris; Vakali, Athena I. (2005)
      One of the main issues in Web usage mining is the discovery of patterns in the navigational behavior of Web users. Standard approaches, such as clustering of users' sessions and discovering association rules or frequent ...
    • Article  

      Prefetching in content distribution networks via Web communities identification and outsourcing 

      Sidiropoulos, Antonis; Pallis, George C.; Katsaros, Dimitrios S.; Stamos, Kostas; Vakali, Athena I.; Manolopoulos, Yannis (2008)
      Content distribution networks (CDNs) improve scalability and reliability, by replicating content to the "edge" of the Internet. Apart from the pure networking issues of the CDNs relevant to the establishment of the ...
    • Conference Object  

      A probabilistic validation algorithm for web users' clusters 

      Pallis, George C.; Angelis, Lefteris; Vakali, Athena I.; Pokorný, Jaroslav (2004)
      Cluster analysis is one of the most important aspects in the data mining process for discovering groups and identifying interesting distributions or patterns over the considered data sets. In the context of Web data mining, ...