Harris Papageorgiou

Also published as: Haris Papageorgiou


2020

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Protest Event Analysis: A Longitudinal Analysis for Greece
Konstantina Papanikolaou | Haris Papageorgiou
Proceedings of the Workshop on Automated Extraction of Socio-political Events from News 2020

The advent of Big Data has shifted social science research towards computational methods. The volume of data that is nowadays available has brought a radical change in traditional approaches due to the cost and effort needed for processing. Knowledge extraction from heterogeneous and ample data is not an easy task to tackle. Thus, interdisciplinary approaches are necessary, combining experts of both social and computer science. This paper aims to present a work in the context of protest analysis, which falls into the scope of Computational Social Science. More specifically, the contribution of this work is to describe a Computational Social Science methodology for Event Analysis. The presented methodology is generic in the sense that it can be applied in every event typology and moreover, it is innovative and suitable for interdisciplinary tasks as it incorporates the human-in-the-loop. Additionally, a case study is presented concerning Protest Analysis in Greece over the last two decades. The conceptual foundation lies mainly upon claims analysis, and newspaper data were used in order to map, document and discuss protests in Greece in a longitudinal perspective.

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Research & Innovation Activities’ Impact Assessment: The Data4Impact System
Ioanna Grypari | Dimitris Pappas | Natalia Manola | Haris Papageorgiou
Proceedings of the 1st Workshop on Language Technologies for Government and Public Administration (LT4Gov)

Cat. 2 Show-case: We present the Data4Impact (D4I) platform, a novel end-to-end system for evidence-based, timely and accurate monitoring and evaluation of research and innovation (R&I) activities. Using the latest technological advances in Human Language Technology (HLT) and our data-driven methodology, we build a novel set of indicators in order to track funded projects and their impact on science, the economy and the society as a whole, during and after the project life-cycle. We develop our methodology by targeting Health-related EC projects from 2007 to 2019 to produce solutions that meet the needs of stakeholders (mainly policy-makers and research funders). Various D4I text analytics workflows process datasets and their metadata, extract valuable insights and estimate intermediate results and metrics, culminating in a set of robust indicators that the users can interact with through our dashboard, the D4I Monitor (available at monitor.data4impact.eu). Therefore, our approach, which can be generalized to different contexts, is multidimensional (technology, tools, indicators, dashboard) and the resulting system can provide an innovative solution for public administrators in their policy-making needs related to RDI funding allocation.

2018

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BioRead: A New Dataset for Biomedical Reading Comprehension
Dimitris Pappas | Ion Androutsopoulos | Haris Papageorgiou
Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018)

2017

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Tweester at SemEval-2017 Task 4: Fusion of Semantic-Affective and pairwise classification models for sentiment analysis in Twitter
Athanasia Kolovou | Filippos Kokkinos | Aris Fergadis | Pinelopi Papalampidi | Elias Iosif | Nikolaos Malandrakis | Elisavet Palogiannidi | Haris Papageorgiou | Shrikanth Narayanan | Alexandros Potamianos
Proceedings of the 11th International Workshop on Semantic Evaluation (SemEval-2017)

In this paper, we describe our submission to SemEval2017 Task 4: Sentiment Analysis in Twitter. Specifically the proposed system participated both to tweet polarity classification (two-, three- and five class) and tweet quantification (two and five-class) tasks.

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Universal Dependencies for Greek
Prokopis Prokopidis | Haris Papageorgiou
Proceedings of the NoDaLiDa 2017 Workshop on Universal Dependencies (UDW 2017)

2016

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SemEval-2016 Task 5: Aspect Based Sentiment Analysis
Maria Pontiki | Dimitris Galanis | Haris Papageorgiou | Ion Androutsopoulos | Suresh Manandhar | Mohammad AL-Smadi | Mahmoud Al-Ayyoub | Yanyan Zhao | Bing Qin | Orphée De Clercq | Véronique Hoste | Marianna Apidianaki | Xavier Tannier | Natalia Loukachevitch | Evgeniy Kotelnikov | Nuria Bel | Salud María Jiménez-Zafra | Gülşen Eryiğit
Proceedings of the 10th International Workshop on Semantic Evaluation (SemEval-2016)

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Tweester at SemEval-2016 Task 4: Sentiment Analysis in Twitter Using Semantic-Affective Model Adaptation
Elisavet Palogiannidi | Athanasia Kolovou | Fenia Christopoulou | Filippos Kokkinos | Elias Iosif | Nikolaos Malandrakis | Haris Papageorgiou | Shrikanth Narayanan | Alexandros Potamianos
Proceedings of the 10th International Workshop on Semantic Evaluation (SemEval-2016)

2015

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SemEval-2015 Task 12: Aspect Based Sentiment Analysis
Maria Pontiki | Dimitris Galanis | Haris Papageorgiou | Suresh Manandhar | Ion Androutsopoulos
Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015)

2014

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SemEval-2014 Task 4: Aspect Based Sentiment Analysis
Maria Pontiki | Dimitris Galanis | John Pavlopoulos | Harris Papageorgiou | Ion Androutsopoulos | Suresh Manandhar
Proceedings of the 8th International Workshop on Semantic Evaluation (SemEval 2014)

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Experiments for Dependency Parsing of Greek
Prokopis Prokopidis | Haris Papageorgiou
Proceedings of the First Joint Workshop on Statistical Parsing of Morphologically Rich Languages and Syntactic Analysis of Non-Canonical Languages

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META-SHARE: One year after
Stelios Piperidis | Harris Papageorgiou | Christian Spurk | Georg Rehm | Khalid Choukri | Olivier Hamon | Nicoletta Calzolari | Riccardo del Gratta | Bernardo Magnini | Christian Girardi
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

This paper presents META-SHARE (www.meta-share.eu), an open language resource infrastructure, and its usage since its Europe-wide deployment in early 2013. META-SHARE is a network of repositories that store language resources (data, tools and processing services) documented with high-quality metadata, aggregated in central inventories allowing for uniform search and access. META-SHARE was developed by META-NET (www.meta-net.eu) and aims to serve as an important component of a language technology marketplace for researchers, developers, professionals and industrial players, catering for the full development cycle of language technology, from research through to innovative products and services. The observed usage in its initial steps, the steadily increasing number of network nodes, resources, users, queries, views and downloads are all encouraging and considered as supportive of the choices made so far. In tandem, take-up activities like direct linking and processing of datasets by language processing services as well as metadata transformation to RDF are expected to open new avenues for data and resources linking and boost the organic growth of the infrastructure while facilitating language technology deployment by much wider research communities and industrial sectors.

2012

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The META-SHARE Metadata Schema for the Description of Language Resources
Maria Gavrilidou | Penny Labropoulou | Elina Desipri | Stelios Piperidis | Haris Papageorgiou | Monica Monachini | Francesca Frontini | Thierry Declerck | Gil Francopoulo | Victoria Arranz | Valerie Mapelli
Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC'12)

This paper presents a metadata model for the description of language resources proposed in the framework of the META-SHARE infrastructure, aiming to cover both datasets and tools/technologies used for their processing. It places the model in the overall framework of metadata models, describes the basic principles and features of the model, elaborates on the distinction between minimal and maximal versions thereof, briefly presents the integrated environment supporting the LRs description and search and retrieval processes and concludes with work to be done in the future for the improvement of the model.

2006

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Multi-domain Multi-lingual Named Entity Recognition: Revisiting & Grounding the resources issue
Voula Giouli | Alexis Konstandinidis | Elina Desypri | Harris Papageorgiou
Proceedings of the Fifth International Conference on Language Resources and Evaluation (LREC’06)

The paper reports on the development methodology of a system aimed at multi-domain multi-lingual recognition and classification of names in texts, the focus being on the linguistic resources used for training and testing purposes. The corpus presented here has been collected and annotated in the framework of different projects the critical issue being the development of a final resource that is homogenous, re-usable and adaptable to different domains and languages with a view to robust multi-domain and multi-lingual NERC.

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Adding multi-layer semantics to the Greek Dependency Treebank
Harris Papageorgiou | Elina Desipri | Maria Koutsombogera | Kanella Pouli | Prokopis Prokopidis
Proceedings of the Fifth International Conference on Language Resources and Evaluation (LREC’06)

In this paper we give an overview of the approach adopted to add a layer of semantic information to the Greek Dependency Treebank [GDT]. Our ultimate goal is to come up with a large corpus, reliably annotated with rich semantic structures. To this end, a corpus has been compiled encompassing various data sources and domains. This collection has been preprocessed, annotated and validated on the basis of dependency representation. Taking into account multi-layered annotation schemes designed to provide deeper representations of structure and meaning, we describe the methodology followed as regards the semantic layer, we report on the annotation process and the problems faced and we conclude with comments on future work and exploitation of the resulting resource.

2004

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The COST278 Pan-European Broadcast News Database
An Vandecatseye | Jean-Pierre Martens | Joao Neto | Hugo Meinedo | Carmen Garcia-Mateo | Javier Dieguez | France Mihelic | Janez Zibert | Jan Nouza | Petr David | Matus Pleva | Anton Cizmar | Harris Papageorgiou | Christina Alexandris
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

2002

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Multi-level XML-based Corpus Annotation
Harris Papageorgiou | Prokopis Prokopidis | Voula Giouli | Iason Demiros | Alexis Konstantinidis | Stelios Piperidis
Proceedings of the Third International Conference on Language Resources and Evaluation (LREC’02)

2000

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Named Entity Recognition in Greek Texts
Iason Demiros | Sotiris Boutsis | Voula Giouli | Maria Liakata | Harris Papageorgiou | Stelios Piperidis
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

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A Unified POS Tagging Architecture and its Application to Greek
Harris Papageorgiou | Prokopis Prokopidis | Voula Giouli | Stelios Piperidis
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

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Automatic Generation of Dictionary Definitions from a Computational Lexicon
Penny Labropoulou | Elena Mantzari | Harris Papageorgiou | Maria Gavrilidou
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

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Design and Implementation of the Online ILSP Greek Corpus
Nick Hatzigeorgiu | Maria Gavrilidou | Stelios Piperidis | George Carayannis | Anastasia Papakostopoulou | Athanassia Spiliotopoulou | Anna Vacalopoulou | Penny Labropoulou | Elena Mantzari | Harris Papageorgiou | Iason Demiros
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

1994

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Automatic Alignment in Parallel Corpora
Harris Papageorgiou | Lambros Cranias | Stelios Piperidis
32nd Annual Meeting of the Association for Computational Linguistics

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A Matching Technique in Example-Based Machine Translation
Lambros Cranias | Harris Papageorgiou | Stelios Piperdis
COLING 1994 Volume 1: The 15th International Conference on Computational Linguistics

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