Harald SackDec 20, 2023
Exploratory Search and Recommendation Systems are the topics of the very last section of our #kg2023 lecture. Learn how to create a simple similarity-based recommender system for books based on SPARQL and #dbpedia. .. but we have 2 more hands-on to come ;-)
OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/34xP0k99EEweSJmbUqi5lQ
youtube video: https://www.youtube.com/watch?v=CbBtM05IBWE&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=66
slides: https://zenodo.org/records/10185305
#knowledgegraphs #exploratorysearch #scifi #sparql #recommendersystems @tabea @sashabruns @MahsaVafaie @fiz_karlsruhe @fizise
Harald SackDec 15, 2023
Semantic Search enables retrieval and discovery beyond trditional information retrieval. Learn how #KnowledgeGraphs and semantic technologies can boost the performance of search and retrieval in this section of our #kg2023 lecture.
OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/6aBMSsEJEZ3YtMOjSYJytn
youtube video: https://www.youtube.com/watch?v=UaCZQ-CsskI&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=65
slides: https://zenodo.org/records/10185298
#semanticsearch #semanticweb #search #retriefal #lecture @fiz_karlsruhe @fizise @tabea
Harald SackDec 13, 2023
Calling Knowledge Graphs and Symbolic AI to the rescue! How #knowledgegraphs can help to improve the performance of large language models and lower the risks of hallucination, we will explain in this section of our free #kg2023 lecture.
OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/1zeQqWUsn1G7YpSvqAAwMI
youtube video: https://www.youtube.com/watch?v=5XhaLlQPsrg&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=63
Slides: https://zenodo.org/records/10185291 #ccby40
@fiz_karlsruhe @fizise #llm #llms #ai #hybridAI #semanticweb #deeplearning
Harald SackDec 12, 2023
Knowledge Graph Embeddings (KGEs) are a very useful tool for few- and zero-shot learning. Of course Link Prediction and #KnowledgeGraph Completion are the most prominent tasks for KGEs. My colleague Ann Tan and I will start our investigation of KGEs in this section of our free #kg2023 lecture.
OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/3xfeKrryLMeY45OXSwBd86
youtube video: https://www.youtube.com/watch?v=UGmtYSCXsQk&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=62
slides: https://zenodo.org/records/10185280
@tabea @sashabruns @MahsaVafaie @fiz_karlsruhe @fizise #embeddings #linkprediction
Harald SackDec 10, 2023
"You shall know a word by the company it keeps." Distributional Semantics as the basis for self supervised learning as in today's large language models. This is what my colleague @MahsaVafaie and I are going to talk about in this #kg2023 lecture excursion.
OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/4fwf0437tRYK49o8Xd18Eg
youtube video: https://www.youtube.com/watch?v=EYAY8nmhpdg&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=61
slides: https://zenodo.org/records/10185262
@fiz_karlsruhe @fizise @tabea @sashabruns @enorouzi #semantics #distributionalsemantics #llm #llms #cooccurrence #wittgenstein
Harald SackDec 8, 2023
Have you ever particularly thought about the graph in knowledge graphs? What can we learn from the graph structure of a knowledge graph? To answer these questions, Ann Tan and I will dive a little bit deeper into graph theory in this section of our #kg2023 lecture.
#openhpi video: https://open.hpi.de/courses/knowledgegraphs2023/items/4tvRVAcst4kQE0N4g0L2TK
youtube video: https://www.youtube.com/watch?v=n2Q8of_Q26E&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=60
slides: https://zenodo.org/records/10185251
#knowledgegraphs #graphtheory #graphs #semanticweb #linkeddata #lod @fiz_karlsruhe @fizise @tabea @sashabruns
Harald SackDec 7, 2023
What if OWL is not enough? In this hands-on tutorial of our #kg2023 lecture @sashabruns is showing you how to create and exploit SWRL rules with protégé.
#OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/2kdpe9211wKu8H2Vc5D8va
youtube video: https://www.youtube.com/watch?v=I81pLmK_lHg&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=57
Slides: https://zenodo.org/records/10136317
@fiz_karlsruhe @fizise @tabea @KIT_Karlsruhe #knowledgegraphs #owl #swrl #ontologies #semanticweb
Harald SackDec 6, 2023
How to create a #knowledgegraph from existing tabular data, as e.g. from a csv file? In this hands-on session of our #kg2023 lecture @tabea will introduce you to OpenRefine and how to use it for knowledge graph creation.
#OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/40isSC3cCz4Tly6OGQEQU5
youtube video: https://www.youtube.com/watch?v=_6NMykfLVQU&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=56
OpenRefine: https://openrefine.org/
@fiz_karlsruhe @fizise @sashabruns @enorouzi @sourisnumerique #semanticweb #knowledgegraphs
Harald SackDec 4, 2023

How to (automatically) create a knowledge graph from text without using an #llm? In this section of our free #kg2023 lecture our colleague Ann Tan will walk you through a python colab notebook in which you will learn how to extract entity pairs and relations needed to construct a knowledge graph.
#OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/51GlCcDoTOxIrT1DNDe8KV
youtube video: https://www.youtube.com/watch?v=QU5WOw-DwT0&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=55
Colab Notebook: https://colab.research.google.com/drive/1xzbByDBcdwgKkr31YBgrdvKYPqPK-tQw?usp=sharing

#knowledgegraphs #semanticweb #nlp #python #notebook @fiz_karlsruhe @fizise

Harald SackDec 3, 2023
What happens, when ontologies hit reality? We tried to compile some best practices for working with ontologies and kn owledge graphs in this section of our free #kg2023 lecture.
#OpenHPI video: https://open.hpi.de/courses/knowledgegraphs2023/items/4g2bLHuPYvqSZcPsJ4CLyS
youtube video: https://www.youtube.com/watch?v=vR0ZU6gOo5Y&list=PLNXdQl4kBgzubTOfY5cbtxZCgg9UTe-uF&index=54
slides: https://zenodo.org/records/10135572
#knowledgegraphs #ontologies #bestpractices #lecture #semanticweb #borges @fiz_karlsruhe @fizise @tabea @sashabruns @enorouzi @nfdi4culture