Dr. Sahar Vahdati

Research Associate sahar
Information Systems Group
University of Oxford

Profiles: LinkedInGoogle ScholarDBLP

Email: vahdati@cs.uni-bonn.de

Short CV


Research Associate at  the Smart Data Analytics Group, Institute for Computer Science III, Rheinische Friedrich-Wilhelms-Universität,  Bonn, Germany (July 2017 – present)

  • Main research areas: Knowledge Management, Knowledge Embedding, Semantic Web, Scholarly Communication Metadata, Semantic Data Integration, Knowledge Graph Integration and Mining, Linked Data, Semantic Web Services, and Web APIs
  • Research projects: OpenAIRE H2020 (Leading Linked Data Team), OpenResearch (Moderator, Main Developer)

Research Associate at  the Intelligent Database Group, Institute for Computer Science III, Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany (October 2012 – present)

  • Main research areas: Intelligent Information Systems, Temporal Information Systems, Deductive Databases (Datalog).

Research Interests


  • Linked Data,  Semantic Web
  • Knowledge Graph Integration
  • Knowldge Graph Embedding
  • Open Data, Semantic Publishing
  • Metadata Management
  • Deductive Databases (Datalog)

Projects


Publications

2020

Fathalla, Said; Vahdati, Sahar; Lange, Christoph; Auer, Sören

Scholarly event characteristics in four fields of science: a metrics-based analysis Journal Article

Scientometrics, 123 (2), pp. 677–705, 2020.

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Nayyeri, Mojtaba; Vahdati, Sahar; Zhou, Xiaotian; Yazdi, Hamed Shariat; Lehmann, Jens

Embedding-Based Recommendations on Scholarly Knowledge Graphs Inproceedings

The Semantic Web - 17th International Conference, ESWC 2020, Heraklion, Crete, Greece, May 31-June 4, 2020, Proceedings, pp. 255–270, Springer, 2020.

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Bellomarini, Luigi; Sallinger, Emanuel; Vahdati, Sahar

Knowledge Graphs: The Layered Perspective Incollection

Knowledge Graphs and Big Data Processing, 12072 , pp. 20–34, Springer, 2020.

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Bellomarini, Luigi; Sallinger, Emanuel; Vahdati, Sahar

Reasoning in Knowledge Graphs: An Embeddings Spotlight Incollection

Knowledge Graphs and Big Data Processing, 12072 , pp. 87–101, Springer, 2020.

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Say, Zeynep; Fathalla, Said; Vahdati, Sahar; Lehmann, Jens; Auer, Sören

Ontology Design for Pharmaceutical Research Outcomes Inproceedings

Digital Libraries for Open Knowledge - 24th International Conference on Theory and Practice of Digital Libraries, TPDL 2020, Lyon, France, August 25-27, 2020, Proceedings, pp. 119–132, Springer, 2020.

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Nayyeri, Mojtaba; Zhou, Xiaotian; Vahdati, Sahar; Izanloo, Reza; Yazdi, Hamed Shariat; Lehmann, Jens

Let the Margin SlidE for Knowledge Graph Embeddings via a Correntropy Objective Function Inproceedings

2020 International Joint Conference on Neural Networks, IJCNN 2020, Glasgow, United Kingdom, July 19-24, 2020, pp. 1–9, IEEE, 2020.

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Nayyeri, Mojtaba; Xu, Chengjin; Vahdati, Sahar; Vassilyeva, Nadezhda; Sallinger, Emanuel; Yazdi, Hamed Shariat; Lehmann, Jens

Fantastic Knowledge Graph Embeddings and How to Find the Right Space for Them Inproceedings

The Semantic Web - ISWC 2020 - 19th International Semantic Web Conference, Athens, Greece, November 2-6, 2020, Proceedings, Part I, pp. 438–455, Springer, 2020.

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Say, Aysegul; Fathalla, Said; Vahdati, Sahar; Lehmann, Jens; Auer, Sören

Semantic Representation of Physics Research Data Inproceedings

Proceedings of the 12th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management, IC3K 2020, Volume 2: KEOD, Budapest, Hungary, November 2-4, 2020, pp. 64–75, SCITEPRESS, 2020.

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Nayyeri, Mojtaba; Alam, Mirza Mohtashim; Lehmann, Jens; Vahdati, Sahar

3D Learning and Reasoning in Link Prediction Over Knowledge Graphs Journal Article

IEEE Access, 8 , pp. 196459–196471, 2020.

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2019

Vahdati, Sahar

Collaborative Integration, Publishing and Analysis of Distributed Scholarly Metadata PhD Thesis

University of Bonn, 2019.

Abstract | Links | BibTeX

Vahdati, Sahar; Fathalla, Said; Auer, Sören; Lange, Christoph; Vidal, Maria-Esther

Semantic Representation of Scientific Publications Inproceedings

Digital Libraries for Open Knowledge - 23rd International Conference on Theory and Practice of Digital Libraries, TPDL 2019, Oslo, Norway, September 9-12, 2019, Proceedings, pp. 375–379, Springer, 2019.

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Ali, Mehdi; Vahdati, Sahar; Singh, Shruti; Dasgupta, Sourish; Lehmann, Jens

Improving Access to Science for Social Good Inproceedings

Machine Learning and Knowledge Discovery in Databases - International Workshops of ECML PKDD 2019, Würzburg, Germany, September 16-20, 2019, Proceedings, Part I, pp. 658–673, Springer, 2019.

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Fathalla, Said; Vahdati, Sahar; Auer, Sören; Lange, Christoph

The scientific events ontology of the OpenResearch.org curation platform Inproceedings

Proceedings of the 34th ACM/SIGAPP Symposium on Applied Computing, SAC 2019, Limassol, Cyprus, April 8-12, 2019, pp. 2311–2313, ACM, 2019.

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Fathalla, Said; Vahdati, Sahar; Lange, Christoph; Auer, Sören

SEO: A Scientific Events Data Model Inproceedings

The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 79–95, Springer, 2019.

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González-Beltrán, Alejandra N; Osborne, Francesco; Peroni, Silvio; Vahdati, Sahar

Editorial: Special Issue on Scholarly Đata Analysis (Semantics, Analytics, Visualisation) Journal Article

Data Sci., 2 (1-2), pp. 177–179, 2019.

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2018

Fathalla, Said; Vahdati, Sahar; Auer, Sören; Lange, Christoph

Metadata Analysis of Scholarly Events of Computer Science, Physics, Engineering, and Mathematics Inproceedings

Digital Libraries for Open Knowledge, 22nd International Conference on Theory and Practice of Digital Libraries, TPDL 2018, Porto, Portugal, September 10-13, 2018, Proceedings, pp. 116–128, Springer, 2018.

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Vahdati, Sahar; Palma, Guillermo; Nath, Rahul Jyoti; Lange, Christoph; Auer, Sören; Vidal, Maria-Esther

Unveiling Scholarly Communities over Knowledge Graphs Inproceedings

Digital Libraries for Open Knowledge, 22nd International Conference on Theory and Practice of Digital Libraries, TPDL 2018, Porto, Portugal, September 10-13, 2018, Proceedings, pp. 103–115, Springer, 2018.

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Fathalla, Said; Vahdati, Sahar; Auer, Sören; Lange, Christoph

SemSur: A Core Ontology for the Semantic Representation of Research Findings Inproceedings

Proceedings of the 14th International Conference on Semantic Systems, SEMANTICS 2018, Vienna, Austria, September 10-13, 2018, pp. 151–162, Elsevier, 2018.

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Behrend, Andreas; Gawlick, Dieter; Vahdati, Sahar; Liu, Zhen Hua

Reasoning Under Situation Awareness in a Temporal Database Inproceedings

Second IEEE International Conference on Robotic Computing, IRC 2018, Laguna Hills, CA, USA, January 31 - February 2, 2018, pp. 387–391, IEEE Computer Society, 2018.

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Omar, Rebaz; Vahdati, Sahar; Lange, Christoph; Vidal, Maria-Esther; Behrend, Andreas

SAANSET: Semi-Automated Acquisition of Scholarly Metadata Using OpenResearch.org Platform Inproceedings

12th IEEE International Conference on Semantic Computing, ICSC 2018, Laguna Hills, CA, USA, January 31 - February 2, 2018, pp. 41–48, IEEE Computer Society, 2018.

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Behrend, Andreas; Vahdati, Sahar; Lange, Christoph; Engels, Christiane

Towards a Cloud-Based Service for Maintaining and Analyzing Data About Scientific Events Inproceedings

Semantics, Analytics, Visualization - 3rd International Workshop, SAVE-SD 2017, Perth, Australia, April 3, 2017, and 4th International Workshop, SAVE-SD 2018, Lyon, France, April 24, 2018, Revised Selected Papers, pp. 1–14, Springer, 2018.

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2017

Behrend, Andreas; Calvanese, Diego; Cerquitelli, Tania; Chiusano, Silvia; Engels, Christiane; Jean, Stéphane; Kozmina, Natalija; Markhoff, Béatrice; Romero, Oscar; Vahdati, Sahar

New Trends in Databases and Information Systems: Contributions from ADBIS 2017 Workshops Inproceedings

New Trends in Databases and Information Systems - ADBIS 2017 Short Papers and Workshops, AMSD, BigNovelTI, DAS, SW4CH, DC, Nicosia, Cyprus, September 24-27, 2017, Proceedings, pp. 111–122, Springer, 2017.

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Ameri, Shirin; Vahdati, Sahar; Lange, Christoph

Exploiting Interlinked Research Metadata Inproceedings

Research and Advanced Technology for Digital Libraries - 21st International Conference on Theory and Practice of Digital Libraries, TPDL 2017, Thessaloniki, Greece, September 18-21, 2017, Proceedings, pp. 3–14, Springer, 2017.

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Fathalla, Said; Vahdati, Sahar; Lange, Christoph; Auer, Sören

Analysing Scholarly Communication Metadata of Computer Science Events Inproceedings

Research and Advanced Technology for Digital Libraries - 21st International Conference on Theory and Practice of Digital Libraries, TPDL 2017, Thessaloniki, Greece, September 18-21, 2017, Proceedings, pp. 342–354, Springer, 2017.

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Fathalla, Said; Vahdati, Sahar; Auer, Sören; Lange, Christoph

Towards a Knowledge Graph Representing Research Findings by Semantifying Survey Articles Inproceedings

Research and Advanced Technology for Digital Libraries - 21st International Conference on Theory and Practice of Digital Libraries, TPDL 2017, Thessaloniki, Greece, September 18-21, 2017, Proceedings, pp. 315–327, Springer, 2017.

Links | BibTeX

González-Beltrán, Alejandra N; Osborne, Francesco; Peroni, Silvio; Vahdati, Sahar

SAVE-SD 2017: Third Workshop on Semantics, Analytics and Visualisation: Enhancing Scholarly Data Inproceedings

Proceedings of the 26th International Conference on World Wide Web Companion, Perth, Australia, April 3-7, 2017, pp. 1681–1682, ACM, 2017.

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Dimou, Anastasia; Vahdati, Sahar; Iorio, Angelo Di; Lange, Christoph; Verborgh, Ruben; Mannens, Erik

Challenges as enablers for high quality Linked Data: insights from the Semantic Publishing Challenge Journal Article

PeerJ Computer Science, 3 , pp. e105, 2017.

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2016

Vahdati, Sahar

Facilitating the Management and Analysis of Scholarly Communication Metadata Inproceedings

Knowledge Engineering and Knowledge Management - EKAW 2016 Satellite Events, EKM and Drift-an-LOD, Bologna, Italy, November 19-23, 2016, Revised Selected Papers, pp. 278–285, Springer, 2016.

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Vahdati, Sahar; Arndt, Natanael; Auer, Sören; Lange, Christoph

OpenResearch: Collaborative Management of Scholarly Communication Metadata Inproceedings

Knowledge Engineering and Knowledge Management - 20th International Conference, EKAW 2016, Bologna, Italy, November 19-23, 2016, Proceedings, pp. 778–793, 2016.

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Ghavimi, Behnam; Mayr, Philipp; Vahdati, Sahar; Lange, Christoph

Identifying and Improving Dataset References in Social Sciences Full Texts Inproceedings

Positioning and Power in Academic Publishing: Players, Agents and Agendas, 20th International Conference on Electronic Publishing, Göttingen, Germany, June 7-9, 2016, pp. 105–114, IOS Press, 2016.

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Dimou, Anastasia; Iorio, Angelo Di; Lange, Christoph; Vahdati, Sahar

Semantic Publishing Challenge - Assessing the Quality of Scientific Output in Its Ecosystem Inproceedings

Semantic Web Challenges - Third SemWebEval Challenge at ESWC 2016, Heraklion, Crete, Greece, May 29 - June 2, 2016, Revised Selected Papers, pp. 243–254, Springer, 2016.

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Ghavimi, Behnam; Mayr, Philipp; Lange, Christoph; Vahdati, Sahar; Auer, Sören

A semi-automatic approach for detecting dataset references in social science texts Journal Article

Inf. Serv. Use, 36 (3-4), pp. 171–187, 2016.

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2015

Iorio, Angelo Di; Lange, Christoph; Dimou, Anastasia; Vahdati, Sahar

Semantic Publishing Challenge - Assessing the Quality of Scientific Output by Information Extraction and Interlinking Inproceedings

Semantic Web Evaluation Challenges - Second SemWebEval Challenge at ESWC 2015, Portorov z, Slovenia, May 31 - June 4, 2015, Revised Selected Papers, pp. 65–80, Springer, 2015.

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Knuth, Magnus; Reddy, Dinesh; Dimou, Anastasia; Vahdati, Sahar; Kastrinakis, George

Towards Linked Data Update Notifications Reviewing and Generalizing the SparqlPuSĦ Approach Inproceedings

Proceedings of the Workshop on Negative or Inconclusive Results in Semantic Web, NoISE 2015, Co-located with the 12th Extended Semantic Web Conference (ESWC 2015), Portoroz, Slovenia, June 1st, 2015, CEUR-WS.org, 2015.

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Vahdati, Sahar; Lange, Christoph; Auer, Sören

OpenCourseWare observatory: does the quality of OpenCourseWare live up to its promise? Inproceedings

Proceedings of the Fifth International Conference on Learning Analytics And Knowledge, LAK '15, Poughkeepsie, NY, USA, March 16-20, 2015, pp. 73–82, ACM, 2015.

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Vahdati, Sahar; Karim, Farah; Huang, Jyun-Yao; Lange, Christoph

Mapping Large Scale Research Metadata to Linked Data: A Performance Comparison of HBase, CSV and XML Inproceedings

Metadata and Semantics Research - 9th Research Conference, MTSR 2015, Manchester, UK, September 9-11, 2015, Proceedings, pp. 261–273, Springer, 2015.

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Knuth, Magnus; Reddy, Dinesh; Dimou, Anastasia; Vahdati, Sahar; Kastrinakis, George

Towards Linked Data Update Notifications Reviewing and Generalizing the SparqlPuSH Approach Inproceedings

Proceedings of the Workshop on Negative or Inconclusive Results in Semantic Web, NoISE 2015, Co-located with the 12th Extended Semantic Web Conference (ESWC 2015), Portoroz, Slovenia, June 1st, 2015, CEUR-WS.org, 2015.

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2014

Vahdati, Sahar; Behrend, Andreas; Lange, Christoph

Identifying research schools using enriched bibliographical metadata Inproceedings

14th International Conference on Knowledge Management and Data-driven Business, I-KNOW '14, Graz, Austria, September 16-19, 2014, pp. 39:1–39:4, ACM, 2014.

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Vahdati, Sahar; Behrend, Andreas; Schüller, Gereon; Manthey, Rainer

A Flexible System for a Comprehensive Analysis of Bibliographical Data Inproceedings

WEBIST 2014 - Proceedings of the 10th International Conference on Web Information Systems and Technologies, Volume 1, Barcelona, Spain, 3-5 April, 2014, pp. 143–151, SciTePress, 2014.

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0000

Iorio, Angelo Di; Lange, Christoph; Dimou, Anastasia; Vahdati, Sahar

Semantic Publishing Challenge Inproceedings

pp. 65–80, 0000.

BibTeX

Dimou, Anastasia; Iorio, Angelo Di; Lange, Christoph; Vahdati, Sahar

Semantic Publishing Challenge Inproceedings

pp. 243–254, 0000.

BibTeX