University of Athens

research

∙ 12/24/2021

Cluster-guided Image Synthesis with Unconditional Models

Generative Adversarial Networks (GANs) are the driving force behind the ...

Markos Georgopoulos, et al. ∙

research

∙ 05/08/2022

Pervasive Machine Learning for Smart Radio Environments Enabled by Reconfigurable Intelligent Surfaces

The emerging technology of Reconfigurable Intelligent Surfaces (RISs) is...

George C. Alexandropoulos, et al. ∙

research

∙ 10/11/2016

Assisted Dictionary Learning for fMRI Data Analysis

Extracting information from functional magnetic resonance (fMRI) images ...

Manuel Morante Moreno, et al. ∙

research

∙ 06/12/2016

Efficient KLMS and KRLS Algorithms: A Random Fourier Feature Perspective

We present a new framework for online Least Squares algorithms for nonli...

Pantelis Bouboulis, et al. ∙

research

∙ 01/04/2016

Robust Non-linear Regression: A Greedy Approach Employing Kernels with Application to Image Denoising

We consider the task of robust non-linear regression in the presence of ...

George Papageorgiou, et al. ∙

research

∙ 09/09/2015

Asymptotically Optimal Multi-Armed Bandit Policies under a Cost Constraint

We develop asymptotically optimal policies for the multi armed bandit (M...

Apostolos N. Burnetas, et al. ∙

research

∙ 03/09/2013

Complex Support Vector Machines for Regression and Quaternary Classification

The paper presents a new framework for complex Support Vector Regression...

Pantelis Bouboulis, et al. ∙

research

∙ 01/19/2012

Adaptive Policies for Sequential Sampling under Incomplete Information and a Cost Constraint

We consider the problem of sequential sampling from a finite number of i...

Apostolos Burnetas, et al. ∙

research

∙ 06/17/2008

Decoding Beta-Decay Systematics: A Global Statistical Model for Beta^- Halflives

Statistical modeling of nuclear data provides a novel approach to nuclea...

N. J. Costiris, et al. ∙

research

∙ 10/13/2017

Compact Formulae in Sparse Elimination

It has by now become a standard approach to use the theory of sparse (or...

Ioannis Emiris, et al. ∙

research

∙ 09/05/2017

Effectiveness of Anonymization in Double-Blind Review

Double-blind review relies on the authors' ability and willingness to ef...

Claire Le Goues, et al. ∙

research

∙ 09/27/2017

Selling to Cournot oligopolists: pricing under uncertainty & generalized mean residual life

We study a classic Cournot market, which we extend to a two-stage game w...

Stefanos Leonardos, et al. ∙

research

∙ 07/15/2017

The Intricacies of 3-Valued Extensional Semantics for Higher-Order Logic Programs

In (Bezem 1999; Bezem 2001), M. Bezem defined an extensional semantics f...

Panos Rondogiannis, et al. ∙

research

∙ 01/25/2018

Killing Two Birds with One Stone -- Querying Property Graphs using SPARQL via GREMLINATOR

Knowledge graphs have become popular over the past decade and frequently...

Harsh Thakkar, et al. ∙

research

∙ 01/30/2018

Social Event Scheduling

A major challenge for social event organizers (e.g., event planning comp...

Nikos Bikakis, et al. ∙

research

∙ 02/08/2018

Bayesian analysis of predictive Non-Homogeneous hidden Markov models using Polya-Gamma data augmentation

We consider Non-Homogeneous Hidden Markov Models (NHHMMs) for forecastin...

Constandina Koki, et al. ∙

research

∙ 03/09/2018

Upstream Demand Uncertainty in a Two-Echelon Supply Chain: Comparative Statics via Stochastic Orderings

We revisit the classic Cournot model and extend it to a two-echelon supp...

Constandina Koki, et al. ∙

research

∙ 03/15/2018

Practical volume computation of structured convex bodies, and an application to modeling portfolio dependencies and financial crises

We examine volume computation of general-dimensional polytopes and more ...

Ludovic Cales, et al. ∙

research

∙ 04/20/2018

Unsupervised learning of the brain connectivity dynamic using residual D-net

In this paper, we propose a novel unsupervised learning method to learn ...

Youngjoo Seo, et al. ∙

research

∙ 04/23/2018

Approximation Fixpoint Theory and the Well-Founded Semantics of Higher-Order Logic Programs

We define a novel, extensional, three-valued semantics for higher-order ...

Angelos Charalambidis, et al. ∙

research

∙ 04/30/2018

Algorithms for Deciding Membership in Polytopes of General Dimension

We study the fundamental problem of polytope membership aiming at large ...

Evangelos Anagnostopoulos, et al. ∙

research

∙ 06/07/2018

Inference for a constrained parameter in presence of an uncertain constraint

We describe a hierarchical Bayesian approach for inference about a param...

Eric Marchand, et al. ∙

research

∙ 06/25/2018

Maximum Rooted Connected Expansion

Prefetching constitutes a valuable tool toward efficient Web surfing. As...

Ioannis Lamprou, et al. ∙

research

∙ 06/27/2018

The Stochastic Score Classification Problem

Consider the following Stochastic Score Classification Problem. A doctor...

Dimitrios Gkenosis, et al. ∙

research

∙ 08/13/2018

Predicate Specialization for Definitional Higher-order Logic Programs

Higher-order logic programming is an interesting extension of traditiona...

Antonis Troumpoukis, et al. ∙

research

∙ 08/11/2018

A Simple Network of Nodes Moving on the Circle

Two simple Markov processes are examined, one in discrete and one in con...

Dimitris Cheliotis, et al. ∙

research

∙ 08/11/2018

Measuring Market Performance with Stochastic Demand: Price of Anarchy and Price of Uncertainty

Globally operating suppliers face the rising challenge of wholesale pric...

Costis Melolidakis, et al. ∙

research

∙ 11/30/2018

Asymptotically Optimal Multi-Armed Bandit Activation Policies under Side Constraints

This paper introduces the first asymptotically optimal strategy for the ...

Apostolos N. Burnetas, et al. ∙

research

∙ 01/01/2019

Algorithmically Efficient Syntactic Characterization of Possibility Domains

We call domain any arbitrary subset of a Cartesian power of the set {0,1...

Josep Diaz, et al. ∙

research

∙ 01/16/2019

Comparative Analysis of Content-based Personalized Microblog Recommendations [Experiments and Analysis]

Microblogging platforms constitute a popular means of real-time communic...

Efi Karra Taniskidou, et al. ∙

research

∙ 02/03/2019

An Alternative Paradigm for Developing and Pricing Storage on Smart Contract Platforms

Smart contract platforms facilitate the development of important and div...

Christos Patsonakis, et al. ∙

research

∙ 02/03/2019

On the Practicality of Smart Contract PKI

Public key infrastructures (PKIs) are one of the main building blocks fo...

Christos Patsonakis, et al. ∙

research

∙ 02/10/2019

Neural embeddings for metaphor detection in a corpus of Greek texts

One of the major challenges that NLP faces is metaphor detection, especi...

Eirini Florou, et al. ∙

research

∙ 02/10/2019

Word embeddings for idiolect identification

The term idiolect refers to the unique and distinctive use of language o...

Konstantinos Perifanos, et al. ∙

research

∙ 03/07/2019

Deep Learning for UL/DL Channel Calibration in Generic Massive MIMO Systems

One of the fundamental challenges to realize massive Multiple-Input Mult...

Chongwen Huang, et al. ∙

research

∙ 03/21/2019

Smart Radio Environments Empowered by AI Reconfigurable Meta-Surfaces: An Idea Whose Time Has Come

Future wireless networks are expected to constitute a distributed intell...

Marco Di Renzo, et al. ∙

research

∙ 04/04/2019

Oceanic Games: Centralization Risks and Incentives in Blockchain Mining

To participate in the distributed consensus of permissionless blockchain...

Nikos Leonardos, et al. ∙

research

∙ 05/01/2019

Next-Paradigm Programming Languages: What Will They Look Like and What Changes Will They Bring?

The dream of programming language design is to bring about orders-of-mag...

Yannis Smaragdakis, et al. ∙

research

∙ 05/06/2019

Heaps Don't Lie: Countering Unsoundness with Heap Snapshots

Static analyses aspire to explore all possible executions in order to ac...

Neville Grech, et al. ∙

research

∙ 05/14/2019

Practical Volume Estimation by a New Annealing Schedule for Cooling Convex Bodies

We study the problem of estimating the volume of convex polytopes, focus...

Apostolos Chalkis, et al. ∙

research

∙ 05/15/2019

MinoanER: Schema-Agnostic, Non-Iterative, Massively Parallel Resolution of Web Entities

Entity Resolution (ER) aims to identify different descriptions in variou...

Vasilis Efthymiou, et al. ∙

research

∙ 05/15/2019

A Survey of Blocking and Filtering Techniques for Entity Resolution

Efficiency techniques are an integral part of Entity Resolution, since i...

George Papadakis, et al. ∙

research

∙ 05/15/2019

End-to-End Entity Resolution for Big Data: A Survey

One of the most important tasks for improving data quality and the relia...

Vassilis Christophides, et al. ∙

research

∙ 05/15/2019

Schema-agnostic Progressive Entity Resolution (extended version)

Entity Resolution (ER) is the task of finding entity profiles that corre...

Giovanni Simonini, et al. ∙

research

∙ 05/19/2019

Indoor Signal Focusing with Deep Learning Designed Reconfigurable Intelligent Surfaces

Reconfigurable Intelligent Surfaces (RISs) comprised of tunable unit ele...

Chongwen Huang, et al. ∙

research

∙ 05/21/2019

Voronoi diagram of orthogonal polyhedra in two and three dimensions

Voronoi diagrams are a fundamental geometric data structure for obtainin...

Ioannis Z. Emiris, et al. ∙

research

∙ 07/15/2019

Improved Budgeted Connected Domination and Budgeted Edge-Vertex Domination

We consider the budgeted version of the classical connected dominating s...

Ioannis Lamprou, et al. ∙

research

∙ 07/21/2019

Infant Mortality Prediction using Birth Certificate Data

The Infant Mortality Rate (IMR) is the number of infants per 1000 that d...

Antonia Saravanou, et al. ∙

research

∙ 07/23/2019

The Expressive Power of Higher-Order Datalog

A classical result in descriptive complexity theory states that Datalog ...

Angelos Charalambidis, et al. ∙

research

∙ 01/08/2020

Deep Static Modeling of invokedynamic

Java 7 introduced programmable dynamic linking in the form of the invoke...

George Fourtounis, et al. ∙

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