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Stelios Piperidis

dblp:95/244 · DBLP profile ↗
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39ranked-venue papers
5as first author
7since 2021 · last 2026
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 38 · 5 first-author · 7 since 2021Human-computer interaction and ubiquitous computing · 1Applied, interdisciplinary, general and emerging computing · 1

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
2 papers
Machine translation · 100%

Topics — the 3 heaviest of 3, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Natural language and speech › Machine translation › parallel corpora
sentence alignment
0.021998
Aligning Clattses in Parallel Texts · EMNLP 1998
Automatic Alignment in Parallel Corpora · ACL 1994
Natural language and speech › Machine translation
parallel corpora
0.011994
Automatic Alignment in Parallel Corpora · ACL 1994
Natural language and speech › Machine translation › statistical machine translation
word alignment
0.011994
Automatic Alignment in Parallel Corpora · ACL 1994

Methods — techniques the papers use, named apart from their topics

alignment · 0.0dynamic programming · 0.0content tags · 0.0
YearPublicationVenuePosition
2026 Common European Language Data Space: Development, Current Status, and Future Perspectives
Stelios Piperidis, Penny Labropoulou, Dimitrios Galanis, Khalid Choukri, Andrejs Vasiljevs, Miltos Deligiannis, Katerina Gkirtzou, Dimitris Gkoumas, Athanasia Kolovou, Leon Voukoutis, Kanella Pouli, Maria Giagkou, Maria Gavrilidou, Katrin Marheinecke, Elena Leitner, Simon Ostermann 0002, Stefania Racioppa, Kossay Talmoudi, Victoria Arranz, Valérie Mapelli, Hélène Mazo, Fernanda González Campo, Aivars Berzins, Andis Lagzdins, Georg Rehm
LREC1
2024 Common European Language Data Space
abstract
The Common European Language Data Space (LDS) is an integral part of the EU data strategy, which aims at developing a single market for data. Its decentralised technical infrastructure and governance scheme are currently being developed by the LDS project, which also has dedicated tasks for proof-of-concept prototypes, handling legal aspects, raising awareness and promoting the LDS through events and social media channels. The LDS is part of a broader vision for establishing all necessary components to develop European large language models.
Georg Rehm, Stelios Piperidis, Khalid Choukri, Andrejs Vasiljevs, Katrin Marheinecke, Victoria Arranz, Aivars Berzins, Miltos Deligiannis, Dimitrios Galanis, Maria Giagkou, Katerina Gkirtzou, Dimitris Gkoumas, Annika Grützner-Zahn, Athanasia Kolovou, Penny Labropoulou, Andis Lagzdins, Elena Leitner, Valérie Mapelli, Hélène Mazo, Simon Ostermann 0002, Stefania Racioppa, Mickaël Rigault, Leon Voukoutis
LREC/COLING2
2024 European Language Grid: One Year after
abstract
The European Language Grid (ELG) is a cloud platform for the whole European Language Technology community. While the EU project that developed the platform successfully concluded in June 2022, the ELG initiative has continued. This article provides a description of the current state of ELG in terms of user adoption and number of language resources and technologies available in early 2024. It also provides an overview of the various activities with regard to ELG since the end of the project and since the publication of the ELG book, especially the co-authors’ attempt to integrate the ELG platform into various data space initiatives. The article also provides an overview of the Digital Language Equality (DLE) dashboard and the current state of DLE in Europe.
Georg Rehm, Stelios Piperidis, Dimitrios Galanis, Penny Labropoulou, Maria Giagkou, Miltos Deligiannis, Leon Voukoutis, Martin Courtois, Julián Moreno Schneider, Katrin Marheinecke
LREC/COLING2
2024 Enhancing Scientific Discourse: Machine Translation for the Scientific Domain
abstract
The increasing volume of scientific research necessitates effective communication across language barriers. Machine translation (MT) offers a promising solution for accessing international publications. However, the scientific domain presents unique challenges due to its specialized vocabulary and complex sentence structures. In this paper, we present the development of a collection of parallel and monolingual corpora from the scientific domain. The corpora target the language pairs Spanish-English, French-English, and Portuguese-English. For each language pair, we create a large general scientific corpus as well as four smaller corpora focused on the research domains of: Energy Research, Neuroscience, Cancer and Transportation. To evaluate the quality of these corpora, we utilize them for fine-tuning general-purpose neural machine translation (NMT) systems. We provide details regarding the corpus creation process, the fine-tuning strategies employed, and we conclude with the evaluation results.
Dimitrios Roussis, Sokratis Sofianopoulos, Stelios Piperidis
EAMT (1)3
2022 Overview of the ELE Project
abstract
This paper provides an overview of the ongoing European Language Equality(ELE) project, an 18-month action funded by the European Commission which involves 52 partners. The primary goal of ELE is to prepare the European Language Equality Programme, in the form of a strategic research, innovation and implementation agenda and a roadmap for achieving full digital language equality (DLE) in Europe by 2030.
Itziar Aldabe, Jane Dunne, Aritz Farwell, Owen Gallagher, Federico Gaspari, Maria Giagkou, Jan Hajic 0001, Jens Peter Kückens, Teresa Lynn, Georg Rehm, German Rigau, Katrin Marheinecke, Stelios Piperidis, Natália Resende, Tereza Vojtechová, Andy Way
EAMT13
2022 SciPar: A Collection of Parallel Corpora from Scientific Abstracts
abstract
This paper presents SciPar, a new collection of parallel corpora created from openly available metadata of bachelor theses, master theses and doctoral dissertations hosted in institutional repositories, digital libraries of universities and national archives. We describe first how we harvested and processed metadata from 86, mainly European, repositories to extract bilingual titles and abstracts, and then how we mined high quality sentence pairs in a wide range of scientific areas and sub-disciplines. In total, the resource includes 9.17 million segment alignments in 31 language pairs and is publicly available via the ELRC-SHARE repository. The bilingual corpora in this collection could prove valuable in various applications, such as cross-lingual plagiarism detection or adapting Machine Translation systems for the translation of scientific texts and academic writing in general, especially for language pairs which include English.
Dimitrios Roussis, Vassilis Papavassiliou, Prokopis Prokopidis, Stelios Piperidis, Vassilis Katsouros
LREC4
2022 Constructing Parallel Corpora from COVID-19 News using MediSys Metadata
abstract
This paper presents a collection of parallel corpora generated by exploiting the COVID-19 related dataset of metadata created with the Europe Media Monitor (EMM) / Medical Information System (MediSys) processing chain of news articles. We describe how we constructed comparable monolingual corpora of news articles related to the current pandemic and used them to mine about 11.2 million segment alignments in 26 EN-X language pairs, covering most official EU languages plus Albanian, Arabic, Icelandic, Macedonian, and Norwegian. Subsets of this collection have been used in shared tasks (e.g. Multilingual Semantic Search, Machine Translation) aimed at accelerating the creation of resources and tools needed to facilitate access to information in the COVID-19 emergency situation.
Dimitrios Roussis, Vassilis Papavassiliou, Sokratis Sofianopoulos, Prokopis Prokopidis, Stelios Piperidis
LREC5
2020 Making Metadata Fit for Next Generation Language Technology Platforms: The Metadata Schema of the European Language Grid
abstract
The current scientific and technological landscape is characterised by the increasing availability of data resources and processing tools and services. In this setting, metadata have emerged as a key factor facilitating management, sharing and usage of such digital assets. In this paper we present ELG-SHARE, a rich metadata schema catering for the description of Language Resources and Technologies (processing and generation services and tools, models, corpora, term lists, etc.), as well as related entities (e.g., organizations, projects, supporting documents, etc.). The schema powers the European Language Grid platform that aims to be the primary hub and marketplace for industry-relevant Language Technology in Europe. ELG-SHARE has been based on various metadata schemas, vocabularies, and ontologies, as well as related recommendations and guidelines.
Penny Labropoulou, Katerina Gkirtzou, Maria Gavrilidou, Miltos Deligiannis, Dimitrios Galanis, Stelios Piperidis, Georg Rehm, Maria Berger, Valérie Mapelli, Mickaël Rigault, Victoria Arranz, Khalid Choukri, Gerhard Backfried, José Manuél Gómez-Pérez, Andrés García-Silva
LREC6
2020 European Language Grid: An Overview
abstract
With 24 official EU and many additional languages, multilingualism in Europe and an inclusive Digital Single Market can only be enabled through Language Technologies (LTs). European LT business is dominated by hundreds of SMEs and a few large players. Many are world-class, with technologies that outperform the global players. However, European LT business is also fragmented – by nation states, languages, verticals and sectors, significantly holding back its impact. The European Language Grid (ELG) project addresses this fragmentation by establishing the ELG as the primary platform for LT in Europe. The ELG is a scalable cloud platform, providing, in an easy-to-integrate way, access to hundreds of commercial and non-commercial LTs for all European languages, including running tools and services as well as data sets and resources. Once fully operational, it will enable the commercial and non-commercial European LT community to deposit and upload their technologies and data sets into the ELG, to deploy them through the grid, and to connect with other resources. The ELG will boost the Multilingual Digital Single Market towards a thriving European LT community, creating new jobs and opportunities. Furthermore, the ELG project organises two open calls for up to 20 pilot projects. It also sets up 32 national competence centres and the European LT Council for outreach and coordination purposes.
Georg Rehm, Maria Berger, Ela Elsholz, Stefanie Hegele, Florian Kintzel, Katrin Marheinecke, Stelios Piperidis, Miltos Deligiannis, Dimitrios Galanis, Katerina Gkirtzou, Penny Labropoulou, Kalina Bontcheva, Jan Hajic 0001, Jana Hamrlová, Lukás Kacena, Khalid Choukri, Victoria Arranz, Andrejs Vasiljevs, Orians Anvari, Andis Lagzdins, Julija Melnika, Gerhard Backfried, Erinç Dikici, Miroslav Jánosík, Katja Prinz, Christoph Prinz, Severin Stampler, Dorothea Thomas-Aniola, José Manuél Gómez-Pérez, Andrés García-Silva, Cristian Berrio, Ulrich Germann, Steve Renals, Ondrej Klejch
LREC7
2020 The European Language Technology Landscape in 2020: Language-Centric and Human-Centric AI for Cross-Cultural Communication in Multilingual Europe
abstract
Multilingualism is a cultural cornerstone of Europe and firmly anchored in the European treaties including full language equality. However, language barriers impacting business, cross-lingual and cross-cultural communication are still omnipresent. Language Technologies (LTs) are a powerful means to break down these barriers. While the last decade has seen various initiatives that created a multitude of approaches and technologies tailored to Europe’s specific needs, there is still an immense level of fragmentation. At the same time, AI has become an increasingly important concept in the European Information and Communication Technology area. For a few years now, AI – including many opportunities, synergies but also misconceptions – has been overshadowing every other topic. We present an overview of the European LT landscape, describing funding programmes, activities, actions and challenges in the different countries with regard to LT, including the current state of play in industry and the LT market. We present a brief overview of the main LT-related activities on the EU level in the last ten years and develop strategic guidance with regard to four key dimensions.
Georg Rehm, Katrin Marheinecke, Stefanie Hegele, Stelios Piperidis, Kalina Bontcheva, Jan Hajic 0001, Khalid Choukri, Andrejs Vasiljevs, Gerhard Backfried, Christoph Prinz, José Manuél Gómez-Pérez, Luc Meertens, Paul Lukowicz, Josef van Genabith, Andrea Lösch, Philipp Slusallek, Morten Irgens, Patrick Gatellier, Joachim Köhler, Laure Le Bars, Dimitra Anastasiou, Albina Auksoriute, Núria Bel, António Branco, Gerhard Budin, Walter Daelemans, Koenraad De Smedt, Radovan Garabík, Maria Gavrilidou, Dagmar Gromann, Svetla Koeva, Simon Krek, Cvetana Krstev, Krister Lindén, Bernardo Magnini, Jan Odijk, Maciej Ogrodniczuk, Eiríkur Rögnvaldsson, Mike Rosner, Bolette S. Pedersen, Inguna Skadina, Marko Tadic, Dan Tufis, Tamás Váradi, Kadri Vider, Andy Way, François Yvon
LREC4
2018 European Language Resource Coordination: Collecting Language Resources for Public Sector Multilingual Information Management
Andrea Lösch, Valérie Mapelli, Stelios Piperidis, Andrejs Vasiljevs, Lilli Smal, Thierry Declerck, Eileen Schnur, Khalid Choukri, Josef van Genabith
LREC3
2018 Discovering Parallel Language Resources for Training MT Engines
Vassilis Papavassiliou, Prokopis Prokopidis, Stelios Piperidis
LREC3
2018 Managing Public Sector Data for Multilingual Applications Development
Stelios Piperidis, Penny Labropoulou, Miltos Deligiannis, Maria Giagkou
LREC1
2016 Parallel Global Voices: a Collection of Multilingual Corpora with Citizen Media Stories
Prokopis Prokopidis, Vassilis Papavassiliou, Stelios Piperidis
LREC3
2014 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
LREC1
2014 The Strategic Impact of META-NET on the Regional, National and International Level
Georg Rehm, Hans Uszkoreit, Sophia Ananiadou, Núria Bel, Audroné Bieleviciené, Lars Borin, António Branco, Gerhard Budin, Nicoletta Calzolari, Walter Daelemans, Radovan Garabík, Marko Grobelnik, Carmen García-Mateo, Josef van Genabith, Jan Hajic 0001, Inma Hernáez Rioja, John Judge, Svetla Koeva, Simon Krek, Cvetana Krstev, Krister Lindén, Bernardo Magnini, Joseph Mariani, John McNaught, Maite Melero, Monica Monachini, Asunción Moreno, Jan Odijk, Maciej Ogrodniczuk, Piotr Pezik, Stelios Piperidis, Adam Przepiórkowski, Eiríkur Rögnvaldsson, Mike Rosner, Bolette S. Pedersen, Inguna Skadina, Koenraad De Smedt, Marko Tadic, Paul Thompson 0002, Dan Tufis, Tamás Váradi, Andrejs Vasiljevs, Kadri Vider, Jolanta Zabarskaite
LREC31
2012 The META-SHARE Metadata Schema for the Description of Language Resources
Maria Gavrilidou, Penny Labropoulou, Elina Desipri, Stelios Piperidis, Harris Papageorgiou, Monica Monachini, Francesca Frontini, Thierry Declerck, Gil Francopoulo, Victoria Arranz, Valérie Mapelli
LREC4
2012 The META-SHARE Language Resources Sharing Infrastructure: Principles, Challenges, Solutions
Stelios Piperidis
LREC1
2012 The FLaReNet Strategic Language Resource Agenda
Claudia Soria, Núria Bel, Khalid Choukri, Joseph Mariani, Monica Monachini, Jan Odijk, Stelios Piperidis, Valeria Quochi, Nicoletta Calzolari
LREC7
2010 The LREC Map of Language Resources and Technologies
Nicoletta Calzolari, Claudia Soria, Riccardo Del Gratta, Sara Goggi, Valeria Quochi, Irene Russo, Khalid Choukri, Joseph Mariani, Stelios Piperidis
LREC9
2010 Resource and Service Centres as the Backbone for a Sustainable Service Infrastructure
Peter Wittenburg, Núria Bel, Lars Borin, Gerhard Budin, Nicoletta Calzolari, Eva Hajicová, Kimmo Koskenniemi, Lothar Lemnitzer, Bente Maegaard, Maciej Piasecki, Jean-Marie Pierrel, Stelios Piperidis, Inguna Skadina, Dan Tufis, Remco van Veenendaal, Tamás Váradi, Martin Wynne
LREC12
2008 Foundation of a Component-based Flexible Registry for Language Resources and Technology
Daan Broeder, Thierry Declerck, Erhard W. Hinrichs, Stelios Piperidis, Laurent Romary, Nicoletta Calzolari, Peter Wittenburg
LREC4
2008 Building a Greek corpus for Textual Entailment
Evi Marzelou, Maria Zourari, Voula Giouli, Stelios Piperidis
LREC4
2008 Condensing Sentences for Subtitle Generation
Prokopis Prokopidis, Vassia Karra, Aggeliki Papagianopoulou, Stelios Piperidis
LREC4
2006 Language Resources Production Models: the Case of the INTERA Multilingual Corpus and Terminology
Maria Gavrilidou, Penny Labropoulou, Stelios Piperidis, Voula Giouli, Nicoletta Calzolari, Monica Monachini, Claudia Soria, Khalid Choukri
LREC3
2004 ENABLER Thematic Network of National Projects: Technical, Strategic and Political Issues of LRs
Nicoletta Calzolari, Khalid Choukri, Maria Gavrilidou, Bente Maegaard, Paola Baroni, Hanne Fersøe, Alessandro Lenci, Valérie Mapelli, Monica Monachini, Stelios Piperidis
LREC10
2004 Multimodal, Multilingual Resources in the Subtitling Process
Stelios Piperidis, Iason Demiros, Prokopis Prokopidis, Peter Vanroose, Anja Höthker, Walter Daelemans, Elsa Sklavounou, Manos Konstantinou, Yannis Karavidas
LREC1
2002 Multi-level XML-based Corpus Annotation
Harris Papageorgiou, Prokopis Prokopidis, Voula Giouli, Iason Demiros, Alexis Konstantinidis, Stelios Piperidis
LREC6
2001 Connectionist models for sentence-based text extracts
abstract
This paper addresses the problem of creating a summary by extracting a set of sentences that are likely to represent the content of a document. A small scale experiment is conducted leading to the compilation of an evaluation corpus for the Greek language. Two models of sentence extraction are then described, along the lines of shallow linguistic analysis, feature combination and machine learning. Both models are based on term extraction and statistical filtering. After extracting the individual features of the text, we apply them to two neural networks that classify each sentence depending on its feature vector, the term weight being the feature with the best discriminant capacity. A three-layer feedforward network trained with the highly popular backpropagation algorithm and a competitive learning self-organizing map characterized by the formation of a topographic map, both trained on a small manually annotated corpus of summaries, perform the sentence extraction task. Both methods could be used for rapid light information retrieval-oriented summarization.
Iason Demiros, Vassilios Antonopoulos, Byron Georgantopoulos, Yannis Triantafyllou, Stelios Piperidis
SMC5
2000 Application of Analogical Modelling to Example Based Machine Translation
Christos Malavazos, Stelios Piperidis
COLING2
2000 A Robust Parser for Unrestricted Greek Text
Sotiris Boutsis, Prokopis Prokopidis, Voula Giouli, Stelios Piperidis
LREC4
2000 Named Entity Recognition in Greek Texts
Iason Demiros, Sotiris Boutsis, Voula Giouli, Maria Liakata, Harris Papageorgiou, Stelios Piperidis
LREC6
2000 Term-based Identification of Sentences for Text Summarisation
Byron Georgantopoulos, Stelios Piperidis
LREC2
2000 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
LREC3
2000 A Unified POS Tagging Architecture and its Application to Greek
Harris Papageorgiou, Prokopis Prokopidis, Voula Giouli, Stelios Piperidis
LREC4
1998 Aligning Clattses in Parallel Texts
Sotiris Boutsis, Stelios Piperidis
EMNLP2
1997 Example retrieval from a translation memory
Lambros Cranias, Harris Papageorgiou, Stelios Piperidis
Nat. Lang. Eng.3
1994 Automatic Alignment in Parallel Corpora
abstract
This paper addresses the alignment issue in the framework of exploitation of large bimultilingual corpora for translation purposes. A generic alignment scheme is proposed that can meet varying requirements of different applications. Depending on the level at which alignment is sought, appropriate surface linguistic information is invoked coupled with information about possible unit delimiters. Each text unit (sentence, clause or phrase) is represented by the sum of its content tags. The results are then fed into a dynamic programming framework that computes the optimum alignment of units. The proposed scheme has been tested at sentence level on parallel corpora of the CELEX database. The success rate exceeded 99%. The next steps of the work concern the testing of the scheme's efficiency at lower levels endowed with necessary bilingual information about potential delimiters.
Harris Papageorgiou, Lambros Cranias, Stelios Piperidis
ACL3
1994 A Matching Technique In Example-Based Machine Translation
Lambros Cranias, Harris Papageorgiou, Stelios Piperidis
COLING3