Helena Galhardas

According to our database, Helena Galhardas authored at least 52 papers between 1996 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2024

Cleenex: Support for User Involvement during an Iterative Data Cleaning Process.

João L. M. Pereira, Manuel J. Fonseca, Antónia Lopes, Helena Galhardas

ACM J. Data Inf. Qual., March, 2024

STaR: Space and Time-aware Statistic Query Answering.

Oana Balalau, Simon Ebel, Helena Galhardas, Théo Galizzi, Ioana Manolescu

Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, 2024

2022

Efficiently Identifying Disguised Missing Values in Heterogeneous, Text-Rich Data.

Théo Bouganim, Helena Galhardas, Ioana Manolescu

Trans. Large Scale Data Knowl. Centered Syst., 2022

AcX: System, Techniques, and Experiments for Acronym Expansion.

João L. M. Pereira, João Casanova, Helena Galhardas, Dennis E. Shasha

Proc. VLDB Endow., 2022

Graph integration of structured, semistructured and unstructured data for data journalism.

Angelos-Christos G. Anadiotis, Oana Balalau, Catarina Conceição, Helena Galhardas, Mhd Yamen Haddad, Ioana Manolescu, Tayeb Merabti, Jingmao You

Inf. Syst., 2022

DeepData: Machine learning in the marine ecosystems.

Leonor Silva, Magda Resende, Helena Galhardas, Vasco Manquinho, Inês Lynce

Expert Syst. Appl., 2022

Consolidation of Massive Medical Emergency Events With Heterogeneous Situational Context Data Sources.

Thomas James Z. Tiam-Lee, Rui Henriques, José Costa, Vasco Manquinho, Helena Galhardas

Proceedings of the Workshops of the EDBT/ICDT 2022 Joint Conference, 2022

2021

Empowering Investigative Journalism with Graph-based Heterogeneous Data Management.

Angelos-Christos G. Anadiotis, Oana Balalau, Théo Bouganim, Francesco Chimienti, Helena Galhardas, Mhd Yamen Haddad, Stephane Horel, Ioana Manolescu, Youssr Youssef

IEEE Data Eng. Bull., 2021

UNIANO: robust and efficient anomaly consensus in time series sensitive to cross-correlated anomaly profiles.

Leonor Silva, Helena Galhardas, Vasco Manquinho, Rui Henriques

Proceedings of the 2021 SIAM International Conference on Data Mining, 2021

Discovering Conflicts of Interest across Heterogeneous Data Sources with ConnectionLens.

Angelos-Christos G. Anadiotis, Oana Balalau, Théo Bouganim, Francesco Chimienti, Helena Galhardas, Mhd Yamen Haddad, Stephane Horel, Ioana Manolescu, Youssr Youssef

Proceedings of the CIKM '21: The 30th ACM International Conference on Information and Knowledge Management, Virtual Event, Queensland, Australia, November 1, 2021

Acronym Expander at SDU@AAAI-21: an Acronym Disambiguation Module.

João L. M. Pereira, Helena Galhardas, Dennis E. Shasha

Proceedings of the Workshop on Scientific Document Understanding co-located with 35th AAAI Conference on Artificial Inteligence, 2021

2020

Graph integration of structured, semistructured and unstructured data for data journalism.

Oana Balalau, Catarina Conceição, Helena Galhardas, Ioana Manolescu, Tayeb Merabti, Jingmao You, Youssr Youssef

CoRR, 2020

CDRGen: A Clinical Data Registry Generator (Formal and/or Technical Paper).

Pedro Alves, Manuel J. Fonseca, João D. Pereira, Helena Galhardas

Proceedings of the Heterogeneous Data Management, Polystores, and Analytics for Healthcare, 2020

2019

On-demand big data integration - A hybrid ETL approach for reproducible scientific research.

Pradeeban Kathiravelu, Ashish Sharma, Helena Galhardas, Peter Van Roy, Luís Veiga

Distributed Parallel Databases, 2019

2018

ConnectionLens: Finding Connections Across Heterogeneous Data Sources.

Camille Chanial, Rédouane Dziri, Helena Galhardas, Julien Leblay, Minh-Huong Le Nguyen, Ioana Manolescu

Proc. VLDB Endow., 2018

Adaptive Execution of Continuous and Data-intensive Workflows with Machine Learning.

Sérgio Esteves, Helena Galhardas, Luís Veiga

Proceedings of the 19th International Middleware Conference, 2018

LeanBench: comparing software stacks for batch and query processing of IoT data.

João M. P. Moreira, Helena Galhardas, Miguel L. Pardal

Proceedings of the 9th International Conference on Ambient Systems, 2018

2017

Umedicine: A System for Clinical Practice Support and Data Analysis.

Nuno F. Lages, Bernardo Caetano, Manuel J. Fonseca, João D. Pereira, Helena Galhardas, Rui Farinha

Proceedings of the Data Management and Analytics for Medicine and Healthcare, 2017

On-Demand Service-Based Big Data Integration: Optimized for Research Collaboration.

Pradeeban Kathiravelu, Yiru Chen, Ashish Sharma, Helena Galhardas, Peter Van Roy, Luís Veiga

Proceedings of the Data Management and Analytics for Medicine and Healthcare, 2017

2016

Smart Scheduling of Continuous Data-Intensive Workflows with Machine Learning Triggered Execution.

Sérgio Esteves, Helena Galhardas, Luís Veiga

CoRR, 2016

2015

Automatic Generation of R2R Mappings from Correspondence Assertions.

Valéria Magalhães Pequeno, Vânia Maria Ponte Vidal, Tiago Vinuto, Helena Galhardas

Proceedings of the XXX Simpósio Brasileiro de Banco de Dados, 2015

∂u∂u Multi-Tenanted Framework: Distributed Near Duplicate Detection for Big Data.

Pradeeban Kathiravelu, Helena Galhardas, Luís Veiga

Proceedings of the On the Move to Meaningful Internet Systems: OTM 2015 Conferences, 2015

Learning to Rank Adaptively for Scalable Information Extraction.

Pablo Barrio, Gonçalo Simões, Helena Galhardas, Luis Gravano

Proceedings of the 18th International Conference on Extending Database Technology, 2015

A Benchmark for Relation Extraction Kernels.

João L. M. Pereira, Helena Galhardas, Bruno Martins

Proceedings of the Advances in Databases and Information Systems, 2015

2014

REEL: A Relation Extraction Learning framework.

Pablo Barrio, Gonçalo Simões, Helena Galhardas, Luis Gravano

Proceedings of the IEEE/ACM Joint Conference on Digital Libraries, 2014

Specifying complex correspondences between relational schemas and <i>RDF</i> models for generating customized <i>R2RML</i> mappings.

Valéria Magalhães Pequeno, Vânia Maria Ponte Vidal, Marco A. Casanova, Luís Eufrasio T. Neto, Helena Galhardas

Proceedings of the 18th International Database Engineering & Applications Symposium, 2014

Using Complex Correspondences for Integrating Relational Data Sources.

Valéria Magalhães Pequeno, Helena Galhardas, Vânia Maria Ponte Vidal

Proceedings of the Enterprise Information Systems - 16th International Conference, 2014

Specifying Complex Correspondences Between Relational Schemas in a Data Integration Environment.

Valéria Magalhães Pequeno, Helena Galhardas

Proceedings of the ICEIS 2014, 2014

2013

When Speed Has a Price: Fast Information Extraction Using Approximate Algorithms.

Gonçalo Simões, Helena Galhardas, Luis Gravano

Proc. VLDB Endow., 2013

A Labeled Graph Kernel for Relationship Extraction

Gonçalo Simões, Helena Galhardas, David Martins de Matos

CoRR, 2013

2012

Benchmarking with TPC-H on Off-the-Shelf Hardware - An Experiments Report.

Anna Thanopoulou, Paulo Carreira, Helena Galhardas

Proceedings of the ICEIS 2012 - Proceedings of the 14th International Conference on Enterprise Information Systems, Volume 1, Wroclaw, Poland, 28 June, 2012

2011

Support for User Involvement in Data Cleaning.

Helena Galhardas, Antónia Lopes, Emanuel Santos

Proceedings of the Data Warehousing and Knowledge Discovery, 2011

2010

Subspace tree: high dimensional multimedia indexing with logarithmic temporal complexity.

Andreas Wichert, Pedro Teixeira, Pedro Santos, Helena Galhardas

J. Intell. Inf. Syst., 2010

Master data management: A proof of concept.

Helena Galhardas, Luis Torres, João Damásio

Proceedings of the 15th International Conference on Information Quality, 2010

An Argumentation-based Approach to Database Repair.

Emanuel Santos, João Pavão Martins, Helena Galhardas

Proceedings of the ECAI 2010, 2010

2007

One-to-many data transformations through data mappers.

Paulo Carreira, Helena Galhardas, Antónia Lopes, João Pereira

Data Knowl. Eng., 2007

On the performance of one-to-many data transformations.

Paulo J. F. Carreira, Helena Galhardas, João Pereira, Fernando Martins, Mário J. Silva

Proceedings of the Fifth International Workshop on Quality in Databases, 2007

On Handling One-to-Many Transformations in Relational Systems.

Paulo Carreira, Helena Galhardas, João Pereira, Andrzej Wichert

Proceedings of the Enterprise Information Systems, 9th International Conference, 2007

One-to-many data transformation operations - optimization and execution on an RDBMS.

Paulo J. F. Carreira, Helena Galhardas, João Pereira, Andrzej Wichert

Proceedings of the ICEIS 2007, 2007

2005

A Survey of Data Quality Tools.

José Barateiro, Helena Galhardas

Datenbank-Spektrum, 2005

Extending Relational Algebra to express one-to-many data transformations.

Paulo J. F. Carreira, Helena Galhardas, Antónia Lopes, João L. M. Pereira

Proceedings of the 20° Simpósio Brasileiro de Bancos de Dados, 2005

Data Cleaning and Transformation Using the AJAX Framework.

Helena Galhardas

Proceedings of the Generative and Transformational Techniques in Software Engineering, 2005

Data Mapper: An Operator for Expressing One-to-Many Data Transformations.

Paulo J. F. Carreira, Helena Galhardas, João Pereira, Antónia Lopes

Proceedings of the Data Warehousing and Knowledge Discovery, 2005

2004

Efficient Development of Data Migration Transformations.

Paulo J. F. Carreira, Helena Galhardas

Proceedings of the ACM SIGMOD International Conference on Management of Data, 2004

Execution of Data Mappers.

Paulo J. F. Carreira, Helena Galhardas

Proceedings of the IQIS 2004, 2004

2003

A Decision Support System for IST Academic Information.

Elsa Cardoso, Helena Galhardas, António Rito Silva

Informatica (Slovenia), 2003

2001

Declarative Data Cleaning: Language, Model, and Algorithms.

Helena Galhardas, Daniela Florescu, Dennis E. Shasha, Eric Simon, Cristian-Augustin Saita

Proceedings of the VLDB 2001, 2001

Improving Data Cleaning Quality Using a Data Lineage Facility.

Helena Galhardas, Daniela Florescu, Dennis E. Shasha, Eric Simon, Cristian-Augustin Saita

Proceedings of the 3rd Intl. Workshop on Design and Management of Data Warehouses, 2001

2000

AJAX: An Extensible Data Cleaning Tool

Helena Galhardas, Daniela Florescu, Dennis E. Shasha, Eric Simon

Proceedings of the 2000 ACM SIGMOD International Conference on Management of Data, 2000

An Extensible Framework for Data Cleaning.

Helena Galhardas, Daniela Florescu, Dennis E. Shasha, Eric Simon

Proceedings of the 16th International Conference on Data Engineering, San Diego, California, USA, February 28, 2000

Declaratively Cleaning your Data with AJAX.

Helena Galhardas, Daniela Florescu, Dennis E. Shasha, Eric Simon

Proceedings of the 16èmes Journées Bases de Données Avancées, 2000

1996

Designing Distributed Databases from an Organisational Perspective.

António Rito Silva, Helena Galhardas, Paulo Sousa, Jorge G. Silva, Pedro Sousa

Proceedings of the Fourth European Conference on Information Systems, 1996