599 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National and Kapodistrian University of AthensGR24 papers
- National Technical University of AthensGR11 papers
- Athena Research and Innovation Center In Information Communication & Knowledge TechnologiesGR9 papers
- Athens State UniversityUS7 papers
- Centre National de la Recherche ScientifiqueFR7 papers
- Centrum Wiskunde & InformaticaNL7 papers
- Delft University of TechnologyNL7 papers
- École PolytechniqueFR7 papers
- University College LondonGB7 papers
- University of OxfordGB7 papers
- Laboratoire d'Informatique de l'École PolytechniqueFR6 papers
- University of AmsterdamNL6 papers
18 papers · 1 filter
Scheduling MapReduce Jobs and Data Shuffle on Unrelated Processors
Dimitrios Fotakis, Ioannis Milis, Emmanouil Zampetakis +1
We propose constant approximation algorithms for generalizations of the Flexible Flow Shop (FFS) problem which form a realistic model for non-preemptive scheduling in MapReduce sys…
Statistical Inference in Hidden Markov Models using -segment Constraints
Michalis K. Titsias, Christopher Yau, Christopher C. Holmes
Hidden Markov models (HMMs) are one of the most widely used statistical methods for analyzing sequence data. However, the reporting of output from HMMs has largely been restricted…
Explaining the behavior of joint and marginal Monte Carlo estimators in latent variable models with independence assumptions
Silia Vitoratou, Ioannis Ntzoufras, Irini Moustaki
In latent variable models the parameter estimation can be implemented by using the joint or the marginal likelihood, based on independence or conditional independence assumptions.…
Packet Travel Times in Wireless Relay Chains under Spatially and Temporally Dependent Interference
Alessandro Crismani, Udo Schilcher, Stavros Toumpis +2
We investigate the statistics of the number of time slots that it takes a packet to travel through a chain of wireless relays. Derivations are performed assuming an interferenc…
On the use of marginal posteriors in marginal likelihood estimation via importance-sampling
K. Perrakis, I. Ntzoufras, E. G. Tsionas
We investigate the efficiency of a marginal likelihood estimator where the product of the marginal posterior distributions is used as an importance-sampling function. The approach…
Improving Mobile Video Streaming with Mobility Prediction and Prefetching in Integrated Cellular-WiFi Networks
Vasilios A. Siris, Maria Anagnostopoulou, Dimitris Dimopoulos
We present and evaluate a procedure that utilizes mobility and throughput prediction to prefetch video streaming data in integrated cellular and WiFi networks. The effective integr…
On the Performance of Network Coding and Forwarding Schemes with Different Degrees of Redundancy for Wireless Mesh Networks
Manolis Ploumidis, Nikolaos Pappas, Vasilios A. Siris +1
This study explores the throughput and delay that can be achieved by various forwarding schemes employing multiple paths and different degrees of redundancy focusing on linear netw…
On the Stability of Generalized Second Price Auctions with Budgets
Josep Diaz, Ioannis Giotis, Lefteris Kirousis +2
The Generalized Second Price (GSP) auction used typically to model sponsored search auctions does not include the notion of budget constraints, which is present in practice. Motiva…
Clustering and Community Detection in Directed Networks: A Survey
Fragkiskos D. Malliaros, Michalis Vazirgiannis
Networks (or graphs) appear as dominant structures in diverse domains, including sociology, biology, neuroscience and computer science. In most of the aforementioned cases graphs a…
Cooperative Relaying in Wireless Networks under Spatially and Temporally Correlated Interference
Alessandro Crismani, Udo Schilcher, Günther Brandner +2
We analyze the performance of an interference-limited, decode-and-forward, cooperative relaying system that comprises a source, a destination, and relays, placed arbitrarily on…
Power-Conditional-Expected Priors: Using g-priors with Random Imaginary Data for Variable Selection
Dimitris Fouskakis, Ioannis Ntzoufras
The Zellner's g-prior and its recent hierarchical extensions are the most popular default prior choices in the Bayesian variable selection context. These prior set-ups can be expre…
Optimal Primary-Secondary user Cooperation Policies in Cognitive Radio Networks
Nestor Chatzidiamantis, Evangelia Matskani, Leonidas Georgiadis +2
In cognitive radio networks, secondary users (SUs) may cooperate with the primary user (PU), so that the success probability of PU transmissions are improved, while SUs obtain more…
Power-Expected-Posterior Priors for Variable Selection in Gaussian Linear Models
Dimitris Fouskakis, Ioannis Ntzoufras, David Draper
In the context of the expected-posterior prior (EPP) approach to Bayesian variable selection in linear models, we combine ideas from power-prior and unit-information-prior methodol…
Evaluation Measures for Hierarchical Classification: a unified view and novel approaches
Aris Kosmopoulos, Ioannis Partalas, Eric Gaussier +2
Hierarchical classification addresses the problem of classifying items into a hierarchy of classes. An important issue in hierarchical classification is the evaluation of different…
Performance and Energy Efficiency of Mobile Data Offloading with Mobility Prediction and Prefetching
Vasilios A. Siris, Maria Anagnostopoulou
We present a detailed evaluation of procedures that exploit mobility prediction and prefetching to enhance offloading of traffic from mobile networks to WiFi hotspots, for both del…
Enhancing Mobile Data Offloading with Mobility Prediction and Prefetching
Vasilios A. Siris, Dimitrios Kalyvas
We present procedures that exploit mobility prediction and prefetching to enhance offloading of traffic from mobile networks to WiFi hotspots, for both delay tolerant and delay sen…
Some combinatorial principles for trees and applications to tree-families in Banach spaces
Costas Poulios, Athanasios Tsarpalias
Suppose that is a normalized family in a Banach space indexed by the dyadic tree . Using Stern's combinatorial theorem we extend important results from sequence…
Paradoxes in Social Networks with Multiple Products
Krzysztof R. Apt, Evangelos Markakis, Sunil Simon
Recently, we introduced in arXiv:1105.2434 a model for product adoption in social networks with multiple products, where the agents, influenced by their neighbours, can adopt one o…