24 citations · 65 across the 17 of their papers we have counts for
17 papers
AgenticER: the next frontier in Entity Resolution
George Papadakis, Panos Korovesis, Manolis Koubarakis +1
Entity Resolution (ER) is a fundamental problem in data management, playing a critical role in tasks like data cleaning and knowledge graph construction. The existing ER approaches…
DistillER: Knowledge Distillation in Entity Resolution with Large Language Models
Alexandros Zeakis, George Papadakis, Dimitrios Skoutas +1
Recent advances in Entity Resolution (ER) have leveraged Large Language Models (LLMs), achieving strong performance but at the cost of substantial computational resources or high f…
Harnessing Collective Intelligence of LLMs for Robust Biomedical QA: A Multi-Model Approach
Dimitra Panou, Alexandros C. Dimopoulos, Manolis Koubarakis +1
Biomedical text mining and question-answering are essential yet highly demanding tasks, particularly in the face of the exponential growth of biomedical literature. In this work, w…
TerraQ: Spatiotemporal Question-Answering on Satellite Image Archives
Sergios-Anestis Kefalidis, Konstantinos Plas, Manolis Koubarakis
TerraQ is a spatiotemporal question-answering engine for satellite image archives. It is a natural language processing system that is built to process requests for satellite images…
Transformer-based Language Models for Reasoning in the Description Logic ALCQ
Angelos Poulis, Eleni Tsalapati, Manolis Koubarakis
Recent advancements in transformer-based language models have sparked research into their logical reasoning capabilities. Most of the benchmarks used to evaluate these models are s…
The Large Language Model GreekLegalRoBERTa
Vasileios Saketos, Despina-Athanasia Pantazi, Manolis Koubarakis
We develop four versions of GreekLegalRoBERTa, which are four large language models trained on Greek legal and nonlegal text. We show that our models surpass the performance of Gre…
Transformers in the Service of Description Logic-based Contexts
Angelos Poulis, Eleni Tsalapati, Manolis Koubarakis
Recent advancements in transformer-based models have initiated research interests in investigating their ability to learn to perform reasoning tasks. However, most of the contexts…
Pre-trained Embeddings for Entity Resolution: An Experimental Analysis [Experiment, Analysis & Benchmark]
Alexandros Zeakis, George Papadakis, Dimitrios Skoutas +1
Many recent works on Entity Resolution (ER) leverage Deep Learning techniques involving language models to improve effectiveness. This is applied to both main steps of ER, i.e., bl…
A Review of the Role of Causality in Developing Trustworthy AI Systems
Niloy Ganguly, Dren Fazlija, Maryam Badar +9
State-of-the-art AI models largely lack an understanding of the cause-effect relationship that governs human understanding of the real world. Consequently, these models do not gene…
Three-dimensional Geospatial Interlinking with JedAI-spatial
Marios Papamichalopoulos, George Papadakis, George Mandilaras +3
Geospatial data constitutes a considerable part of (Semantic) Web data, but so far, its sources are inadequately interlinked in the Linked Open Data cloud. Geospatial Interlinking…
Multi-granular Legal Topic Classification on Greek Legislation
Christos Papaloukas, Ilias Chalkidis, Konstantinos Athinaios +2
In this work, we study the task of classifying legal texts written in the Greek language. We introduce and make publicly available a novel dataset based on Greek legislation, consi…
OBDA for the Web: Creating Virtual RDF Graphs On Top of Web Data Sources
Konstantina Bereta, George Papadakis, Manolis Koubarakis
Due to Variety, Web data come in many different structures and formats, with HTML tables and REST APIs (e.g., social media APIs) being among the most popular ones. A big subset of…
Evaluating Geospatial RDF stores Using the Benchmark Geographica 2
Theofilos Ioannidis, George Garbis, Kostis Kyzirakos +2
Since 2007, geospatial extensions of SPARQL, like GeoSPARQL and stSPARQL, have been defined and corresponding geospatial RDF stores have been implemented. In addition, some work on…
Comparative Analysis of Content-based Personalized Microblog Recommendations [Experiments and Analysis]
Efi Karra Taniskidou, George Papadakis, George Giannakopoulos +1
Microblogging platforms constitute a popular means of real-time communication and information sharing. They involve such a large volume of user-generated content that their users s…
Full-text Support for Publish/Subscribe Ontology Systems
Lefteris Zervakis, Christos Tryfonopoulos, Antonios Papadakis-Pesaresi +2
We envision a publish/subscribe ontology system that is able to index millions of user subscriptions and filter them against ontology data that arrive in a streaming fashion. In th…
Geographica: A Benchmark for Geospatial RDF Stores
George Garbis, Kostis Kyzirakos, Manolis Koubarakis
Geospatial extensions of SPARQL like GeoSPARQL and stSPARQL have recently been defined and corresponding geospatial RDF stores have been implemented. However, there is no widely us…
Incomplete Information in RDF
Charalampos Nikolaou, Manolis Koubarakis
We extend RDF with the ability to represent property values that exist, but are unknown or partially known, using constraints. Following ideas from the incomplete information liter…