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Harald Sack

lysander07@sigmoid.social

<p>Professor at FIZ Karlsruhe &amp; KIT with research focus on Knowledge Graphs, Semantic Technologies and Exploratory Search...<br />Head of <span class="h-card" translate="no"><a href="https://sigmoid.social/@fizise" class="u-url mention">@<span>fizise</span></a></span></p><p><a href="https://sigmoid.social/tags/knowledgegraphs" class="mention hashtag" rel="tag">#<span>knowledgegraphs</span></a> <a href="https://sigmoid.social/tags/semanticweb" class="mention hashtag" rel="tag">#<span>semanticweb</span></a> <a href="https://sigmoid.social/tags/nlp" class="mention hashtag" rel="tag">#<span>nlp</span></a> <a href="https://sigmoid.social/tags/llms" class="mention hashtag" rel="tag">#<span>llms</span></a> <a href="https://sigmoid.social/tags/culturalheritage" class="mention hashtag" rel="tag

Posts

  • Post #2252383

    After today&amp;#39;s #KDAI2026 lecture on &amp;quot;Basic Machine Learning 01&amp;quot;, you will understand why most of what people say about AI in public debate is either wrong, confused, or missing the point β€” and you will have the tools to do better. If you&amp;#39;ve ever wondered how Netflix predicts your next binge-watch or how self-driving cars navigate, this is where it all starts. @fizise #AI #machinelearning #DeepLearning #transformers #llms #ontologies #historyofAI #lecture #Studen...

  • Post #2152576

    🎷 Session 03 of #KDAI2026 - Basic Machine Learning II went live today. This week&amp;#39;s transmission lands on 3 foundational algorithms: πŸ”­ k-Means Clustering β€” when there are no labels, let the data speak for itself πŸ“‰ Linear Regression β€” drawing the straightest line through the chaos 🌳 Decision Trees β€” asking the right questions in the right order. Because every good lecture deserves a soundtrack. 🎢 #AI #MachineLearning #AIeducation #LehreKIT #CowboyBebop @fiz_karlsruhe @fizise

  • Post #1705570

    &amp;quot;Knowing what you don&amp;#39;t know&amp;quot; - the keynote by Marieke van Erp from Digital Humanities Research Lab at the KNAW Humanities Cluster starts with an introduction to the Dutch East India Company (VOC) - and the question of who is not familiar with the VOC. However, it is about gaps, quality issues and other challenges of DH use cases #eswc2024 #semdh2024 @semdh #dh #semanticweb #knowledgegraphs #culturalheritage #voc

  • Post #1705569

    Digitalisation Workflows in the age of Transformer Models: A Case Study in Digital Cultural Heritage ist the topic of the poster presentation of @MahsaVafaie from @fiz_karlsruhe (joint work with Mary Ann Tan) paper: https://semdh.github.io/assets/papers/SemDH-paper-13.pdf GutHub: https://github.com/ISE-FIZKarlsruhe/Wiedergutmachung #dh #semdh2024 @semdh #eswc2024 #semanticweb #knowledgegraphs @fizise

  • Post #1627482

    Here are the slides of my talk &amp;quot;Symbolic and Subsymbolic AI - An Epic Dilemma!&amp;quot; at the conference &amp;quot;Cultures of Artificial Intelligence - New Perspectives for Museums&amp;quot; at @BadischesLandesmuseum https://github.com/lysander07/Presentations/blob/main/Symbolic%20and%20Subsymbolic%20AI%20%20-%20an%20Epic%20Dilemma_.pdf @epoz @fizise #CulturesAI2212 #foundation #ai #knowledgegraph #semanticweb #deeplearning #languagemodel

  • Post #1617721

    πŸŽ“ Knowledge-driven AI is back β€” Summer Semester 2026. 12 lectures. One central question: What does it actually mean for a machine to understand? We&amp;#39;ll journey from Aristotle&amp;#39;s categories to knowledge graphs, from the first perceptron to today&amp;#39;s foundation models β€” exploring how symbolic reasoning and modern machine learning meet, clash, and complement each other. #KDAI2026 #AI #MachineLearning #KnowledgeGraphs #SemanticWeb @fizise @KIT_Karlsruhe @fiz_karlsruhe #HigherEdu...

  • Post #1617719

    πŸ” Lecture 01 β€” The Art of Understanding Before we teach machines to reason, we should ask ourselves: what is knowledge, really? This opening lecture steps back from the algorithms and starts with first principles. It&amp;#39;s the philosophical foundation the rest of the course is built on. Bring your curiosity. Leave your assumptions at the door. #KDAI2026 #AI #Epistemology #DataToKnowledge #SemanticWeb #KnowledgeRepresentation #MachineLearning #PhilosophyOfAI @fizise @fiz_karlsruhe

  • Post #1552712

    🌟 Call for Submissions for ISWC 2025 is out!! 🌟 The International Semantic Web Conference 2025 will take place in Nara, Japan. Deadline for the Research track: May 6, 2025 (abstracts), May 13, 2025 (full papers) #ISWC2025 website: https://iswc2025.semanticweb.org/ #semanticweb #knowledgegraphs #ontologies #logic #AI #generativeAI #llms #neurosymbolic #neurosymbolicAI @iswc_conf @fizise @tabea @sashabruns @enorouzi @MahsaVafaie

  • Post #1552710

    TGDK is launching a Special Issue for Use-Case articles. They are interested in submissions describing use-cases (applications, events, products, services, etc.) that put research on Graph Data &amp;amp; Knowledge into practice. If you work on such initiatives, consider telling the community about them by submitting to the Special Issue! Deadline is March 31, 2025. https://drops.dagstuhl.de/entities/journal/TGDK#cfp-si-use-case-articles @tgdkjournal #knowledgegraphs #semanticweb #ontologies #...

  • Post #1331621

    In case you didn&amp;#39;t have the chance to visit our poster on NFDIcore 3.0: A Mid-Level BFO2020-Compliant Ontology for Sustainable Research Data Interoperability Across Consortia, you can find it here on Zenodo: https://zenodo.org/records/16946279 Corresponding abstract: https://zenodo.org/records/16736251 #cordi2025 #nfdirocks @nfdi4culture @NFDI4Memory @NFDI4DS #NFDIMatWerk #ontologies #bfo #bfo2020 #knowledgegraphs #researchdata @tabea @heikef @sourisnumerique @epoz @joerg @sashabruns

  • Post #1317647

    3rd Workshop on Metadata and Research (objects) Management for Linked Open Science - #DaMaLOS2023 at @eswc_conf #eswc2023 Interested in #SemanticWeb #LinkedOpenScience #LinkedData #OpenScience #DataManagement #ROCrates and you want to share your research results? Deadline for paper submission: March 31, 2023 https://zbmed.github.io/damalos/ @ZBMED @GESIS

  • Post #1287221

    Interesting distributed terminology service Network of Terms, found in the #swib23 feed, Thanks to @ennomeijers Code and documentation available on #GitHub #terminology #semanticweb #graphql #nfdi https://github.com/netwerk-digitaal-erfgoed/network-of-terms-tutorial/wiki/Goal-and-purpose-of-the-Network-of-Terms

  • Post #1203974

    The proceedings of #semantics2024 &amp;quot;Knowledge Graphs in the Age of Language Models and Neuro-Symbolic AI&amp;quot; are now available under #openaccess at IOS Press: https://www.iospress.com/catalog/books/knowledge-graphs-in-the-age-of-language-models-and-neuro-symbolic-ai #semanticweb #knowledgegraphs #ai #llms #amsterdam #conference @SaharVahdati @semantics @angelosalatino @shufan @tape @fizise @fiz_karlsruhe

  • Post #1203971

    If you&amp;#39;re into NLP or LLMs or Research Knowledge Graphs for processing or making use of scientific language, consider to submit! Call for papers for the 2nd Int. Workshop on Natural Scientific Language Processing and Research Knowledge Graphs (NSLP 2025) is out. Deadline: March 6, 2025 website: https://nfdi4ds.github.io/nslp2025/ #nlp #knowledgegraphs #ontologies #semanticweb @NFDI4DS #NFDIrocks @shufan @GenAsefa @heikef @fiz_karlsruhe @fizise #cfp #eswc2025 #llms

  • Post #1203968

    ReadMe2KG: Github ReadMe to Knowledge Graph #Challenge has been published as part of the Natural Scientific Language Processing and Research Knowledge Graphs #NSLP2025 workshop co-located with #eswc2025. This #NER task aims to complement the NDFI4DataScience KG via information extraction from GitHub README files. task description: https://nfdi4ds.github.io/nslp2025/docs/readme2kg_shared_task.html website: https://www.codabench.org/competitions/5396/ @eswc_conf @GenAsefa @shufan @NFDI4DS #NFDI...

  • Post #1167404

    Greetings from the FIZ Karlsruhe Research Retreat at KΓΆnigstuhl, above the city of Heidelberg. I had the pleasure to introduce and conduct a Design Thinking session together with 40 brilliant colleagues to work on how to improve our research @fiz_karlsruhe @fizise @zbMATH @tabea @GenAsefa @heikef @enorouzi @sourisnumerique #semanticweb #knowledgegraphs #AI #llms #nlp #innovation #designthinking

  • Post #1149600

    A special occasion in our @fizise research seminar today: Sebastian Rudolph from TU Dresden was presenting on How to Agree to Disagree - Managing Ontological Perspectives using Standpoint Logic paper: https://arxiv.org/abs/2206.06793 #semanticweb #logics #knowledgerepresentation #academiclife @fiz_karlsruhe @sourisnumerique @enorouzi @sashabruns @tabea @GenAsefa @MahsaVafaie @shufan @heikef

  • Post #1149593

    We must never forget! Today, we commemorate the 80th anniversary of the liberation of Auschwitz-Birkenau. In the #BMI funded project &amp;quot;Wiedergutmachung&amp;quot; we focus on the digitalization &amp;amp; information extraction of &amp;gt;2M case files &amp;amp; court documents related to the German postwar recompensation process of national-socialist injustice to make them available not only for research (within the existing rules for data privacy). #WeRemember @bmi @LandesarchivBW @Mah...

  • Post #1149587

    Explaining interested people in Karlsruhe about our research on the challenges &amp;amp; opportunities of the digitalisation of the more than 100km of archival documents of the recompensation process of nationalsocialist injustice #digitalisierung @bmf @fiz_karlsruhe @fizise @MahsaVafaie @LandesarchivBW

  • Post #1149584

    Today, I&amp;#39;m at Bundesarchiv in Koblenz for the Strategy &amp;amp; Planning meeting of our project &amp;quot;Wiedergutmachung&amp;quot;. Our task in this project is to develop efficient information extraction from historical case files of the German Postwar recompensation process of nationalsocialist injustice. @fiz_karlsruhe @fizise @LandesarchivBW #bundesarchiv @bmf #knowledgegraphs #llms #AI #informationextraction #archives #project @ddbkultur @archivportal @MahsaVafaie @fschwic

  • Post #1149578

    Towards Linked Stage Graph 2.0 – a #KnowledgeGraph based Research Resource for the #PerformingArts is presented by @tabea at #dhd2024 demonstrating how #knowledgegraphs can be used to explore research data of the performing arts domain, in particular with performance related data from Stuttgart theatres abstract: https://zenodo.org/records/10698238 Linked Stage Graph: https://slod.fiz-karlsruhe.de/ #knowledgegraphs #ontologies @sashabruns @sourisnumerique @fiz_karlsruhe @fizise @LandesarchivB...

  • Post #1149577

    Goodbye Passau, goodbye #dhd2024! It has been a very pleasant stay and a great conference filled with exciting presentations and inspiring discussions with a wonderful community! Not to forget the excellent Espresso in Cafe Stopover across the street πŸ˜‹ Kudos to all the organizers! You did a marvelous job! Hope to see you next year again in Bielefeld! @fizise @tabea @sashabruns @sourisnumerique #KnowledgeGraphs #culturalheritage @nfdi4culture

  • Post #1149568

    Linnea SΓΆhn from AdW Mainz and @sashabruns from @fiz_karlsruhe are presenting our paper &amp;quot;What&amp;#39;s cooking in the NFDI4Culture Kitchen - A Knowledge Graph based Research Data Integration Workflow at #DaMaLos2024 workshop #eswc2024 paper: https://zenodo.org/records/11244586 slides: https://zenodo.org/records/11311687 original post: https://sigmoid.social/@eswc_conf/112506132841928255 @sashabruns @tabea @jalle @fizise @nfdi4culture #nfdirocks #knowledgegrapohs #semanticweb #data...

  • Post #1149564

    At the #SemDH2024 workshop, @sourisnumerique is presenting our paper on &amp;quot;eXtreme Design for Ontological Engineering in the Digital Humanities with Viewsari, a Knowledge Graph of Giorgio Vasari&amp;#39;s The Lives&amp;quot; paper: https://semdh.github.io/assets/papers/SemDH-paper-4.pdf Viewsari website: https://viewsari.ise.fiz-karlsruhe.de/ GitHub: https://github.com/ISE-FIZKarlsruhe/viewsari-kg/tree/main #semanticweb #ontologies #knowledgegraphs #dh #viewsari @fizise @fiz_karlsruhe #...

  • Post #1149562

    At the #NFDI4Culture Community Plenary we demonstrated different ways of how to contribute to NFDI4Culture #KnowledgeGraph. Besides #LinkedOpenData and standardized metadata schemata, as e.g. LIDO, CIDOC-CRM, or OAI-PMH, we also offer lightweight CGIF (schema.org-based) and #WikiBase as supported formats. The example demonstrates how we integrate/map @FactGrid into the NFDI4C-KG index. @nfdi4culture @NFDI4Memory @tabea @epoz @sashabruns @sourisnumerique @heikef @jalle @fiz_karlsruhe

  • Post #1126889

    Open PhD/Junior Researcher Position in Neurosymbolic AI and Information Extraction on historical documents at FIZ Karlsruhe - Knowledge-driven AI research group (former ISE research group), starting at Jan 1, 2026. Application Deadline: Oct 31, 2025 https://www.fiz-karlsruhe.de/en/stellenanzeigen/phdjunior-researcher-wmx-0 #jobadvertisement #phd #AI #neurosymbolicAI #informationextraction #machinelearning #knmowledgegraphs #ontologies @fiz_karlsruhe @fizise #dh #culturalheritage @nfdi4culture...

  • Post #1126886

    2nd contribution by @fizise team is presented by @enorouzi: &amp;quot;AI4DiTraRe: Building the BFO-Compliant Chemotion Knowledge Graph&amp;quot;, which is a #BFO aligned, scalable #knowledgegraph of experimental #chemistry data that facilitates #interoperability, #provenance tracking, and #Reasoning supporting AI-driven research and discovery. Joint work w @joerg Nicole Jung paper: https://sci-k.github.io/2025/papers/paper16.pdf Chemotion-KG: https://ditrare.ise.fiz-karlsruhe.de/chemotion-kg/...

  • Post #1126883

    Keynote by Roger H. French on Semantic Data Management and MDS-Onto for Synchrotron Science at the #SeMatS2025 workshop #ISWC2025 presenting a vast amount of Materials Data Science-related research. Amongst others, the Materials Data Science Ontology (MDS-Onto), which builds upon PMDco, CCO, and BFO. https://ontolearner.readthedocs.io/benchmarking/materials_science_and_engineering/mds.html paper on MDS.Onto: https://www.nature.com/articles/s41597-025-04938-5 #materialsscience #mse #ontologies...

  • Post #1126882

    The #SeMatS2025 workshop has started this afternoon with a quick introduction by @HL with 5 paper presentations and 2 keynotes. There is also a special issue on Semantic Materials Science coming up with the Semantic Web Journal. Stay tuned for further announcements! https://sites.google.com/view/semats2025/ #materialsscience #semanticweb #knowledgegraphs #iswc2025 #ontologies #AI

  • Post #1102088

    Hang in there, my fellow #knowledgegraph researchers and practitioners, soon (in a few years) we will reach the &amp;quot;Slope of Enlightenment&amp;quot; ;-) The new Gartner hype cycle for AI positions knowledge graphs right in the middle of the &amp;quot;Through of Disillusionment&amp;quot; ... while placing #GenerativeAI and #FoundationModels #LLMs at the peak of the hype https://www.gartner.com/en/articles/what-s-new-in-artificial-intelligence-from-the-2023-gartner-hype-cycle#:~:text=The%20...