Harald Sack

Professor at FIZ Karlsruhe & KIT with research focus on Knowledge Graphs, Semantic Technologies and Exploratory Search...
Head of @fizise

#knowledgegraphs #semanticweb #nlp #llms #culturalheritage #digitalhumanities #ontologies #research #academiclife #excellentespresso

Public Key

npub19zuquzz22hadk9vt88j8uv03pp8aqwankchxqwkku95sdlyk0dnq2lz7fg

NIP-05 Address

lysander07@sigmoid-social.mostr.pub

Profile Code

nprofile1qqsz3wqwpp99t7kmzk9nner7x8cssn7s8wemvtnq8ttwz6gxljt8kes59rc8f

Author Public Key

npub19zuquzz22hadk9vt88j8uv03pp8aqwankchxqwkku95sdlyk0dnq2lz7fg

Show more details

Last Notes

2025-05-29 09:58:47

Yesterday attending a project strategy meeting for MaterialDigital at the Institute for microtribology. No, I don’t have any idea why they have put this in front of it😜
#pmd #materialsscience #mse @nprofile…lz4a @nprofile…2qy8 @nprofile…5svm @nprofile…dgga
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/590/516/271/278/924/original/e9b424f9982d26a8.jpeg

2025-05-08 08:03:00

Next stop on our NLP timeline (as part of the #ISE2025 lecture) was Terry Winograd's SHRDLU, an early natural language understanding system developed in 1968-70 that could manipulate blocks in a virtual world.
Winograd, T. Procedures as a Representation for Data in a Computer Program for Understanding Natural Language. MIT AI Technical Report 235.
http://dspace.mit.edu/bitstream/handle/1721.1/7095/AITR-235.pdf
#nlp #lecture #historyofscience @nprofile…5svm @nprofile…dgga @nprofile…6xz7 @nprofile…vvu2 @nprofile…lz4a #AI
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/471/146/893/229/333/original/4a403cdd4114f1b0.png

2025-05-07 10:42:16

- reply

@nprofile…pwgg @nprofile…dgga @nprofile…5svm @nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2
As you might read the longer text included in the slides, I don't disagree with you ;-) .And yes, the fatal effect that people are easily tricked to overestimate the machine's "intellectual" capacities is exactly what I am talking about to the students pointing towards today's popular LLM-based chatbots...
However, ELIZA was a first simple chatbot and thereby a milestone in rule-based NLP of that time (i.e. the 1960s)

2025-05-07 09:59:49

With the advent of ELIZA, Joseph Weizenbaum's first psychotherapist chatbot, NLP took another major step with pattern-based substitution algorithms based on simple regular expressions.
Weizenbaum, Joseph (1966). ELIZA—a computer program for the study of natural language communication between man and machine. Com. of the ACM. 9: 36–45.
https://dl.acm.org/doi/pdf/10.1145/365153.365168
#nlp #lecture #chatbot #llm #ise2025 #historyofScience #AI @nprofile…dgga @nprofile…5svm @nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/465/947/141/883/651/original/bc8a5f773f798f50.png

2025-05-05 10:05:30

Next stop in our NLP timeline are the (mostly) futile tries of machine translation during the cold war era. The rule-based machine translation approach was used mostly in the creation of dictionaries and grammar programs. It’s major drawback was that absolutely everything had to be made explicit.
#nlp #historyofscience #ise2025 #lecture #machinetranslation #coldwar #AI #historyofAI @nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2 @nprofile…5svm @nprofile…dgga
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/454/632/490/417/896/original/d05c1bb3835ce55d.png

2025-05-04 08:38:37

Next step in our NLP timeline is Claude Elwood Shannon, who already laid the foundations for statistical language modeling by recognising the relevance of n-grams to model properties of language and predicting the likelihood of word sequences.
C.E. Shannon ""A Mathematical Theory of Communication" (1948) https://web.archive.org/web/19980715013250/http://cm.bell-labs.com/cm/ms/what/shannonday/shannon1948.pdf
#ise2025 #nlp #lecture #languagemodel #informationtheory #historyofscience @nprofile…lz4a @nprofile…6xz7 @nprofile…vvu2 @nprofile…5svm @nprofile…dgga
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/448/643/285/275/220/original/3a7947c4e3363a82.png

2025-05-02 18:06:53

- reply

@nprofile…68w5 @nprofile…nklx ebenfalls vielen Dank für den Link! Meine erste Beschwerde an die ARD ging gerade raus.

2025-04-30 10:04:39

Today, the 2nd lecture of #ISE2025 took place with an introduction into Natural Language Processing, which will be subject of our lecture for the next 4 weeks.
#AI #nlp #informationextraction #ocr #ner #linguistics #computationallinguistics #morphology #pos #ambiguity #language @nprofile…5svm @nprofile…dgga @nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2 #AIart #generativeAI #machinetranslation #languagemodels #llm
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/426/329/421/590/963/original/e2059cf77a6b9099.png

2025-04-28 07:56:56

As knowledge and understanding were the main subjects of last week's first #ise2025 lecture, I was also introducing the semiotic triangle as in C.K. Ogden, I.A. Richards: The Meaning of Meaning: A Study of the Influence of Language upon Thought and of the Science of Symbolism, 1923.
#language #understanding #philosophy #nlp #linguistics #ontology #semiotics @nprofile…5svm @nprofile…dgga @nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/414/506/010/667/660/original/64bfb13d3015c633.png

2025-04-25 07:06:29

What does it mean "to know" something? Have you ever thought about it? We tried to make our students think about it in this week's first #ise2025 lecture.
#kit200 #lecture #knowledge #philosophy #knowledgerepresentation #understanding #semweb #knowledgegraph #nlp @nprofile…5svm @nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/397/328/288/330/244/original/cc37cf51cdfa8ef5.png

2025-04-25 06:45:42

Interesting to see that the editors of the Journal of Intangible Cultural Heritage Studies think of me as an expert of "The Doctoral Sword and the Living History in Finland" ;-) 🗡️⚔️🤺
#culturalheritage #dh #sword #phd #finland #jichs #academiclife #peerreview
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/397/231/508/969/115/original/8c726f99b53ef8db.png

2025-04-23 14:45:24

One of the central topics discussed in today's first ISE 2025 lecture is "Knowledge". How can we define knowledge? How does it differ from data, information, or wisdom? How does the process of "understanding" work? Welcome to "The Art of Understanding", which is the title of this lecture...
#ise2025 #semweb #semanticweb #AI #nlp #philosophy #lecture @nprofile…dgga @nprofile…5svm @nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/387/797/670/641/241/original/c7cdec58618ccff1.png

2025-04-23 05:54:18

In a few minutes this year's Information Service Engineering lecture is about to start. I'll keep you posted ;-)
@nprofile…6xz7 @nprofile…lz4a @nprofile…vvu2 @nprofile…dgga @nprofile…5svm @nprofile…yhct #kit200 #ise2025
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/385/721/336/198/688/original/7785156a39dfa9af.png

2025-04-17 09:56:44

Interesting (short) paper of game-based training and evaluation of agentic behaviour in LLMs: Leon Guertler, Bobby Cheng, Simon Yu, Bo Liu, Leshem Choshen, Cheston Tan.: "Textarena"
https://arxiv.org/html/2504.11442v1
#llms #AI #generativeai #agents #agenticAI #evaluation
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/352/691/767/995/186/original/8ec7bc49fc9d6910.png

2025-04-14 11:54:24

- reply

@nprofile…syql @nprofile…5ac4 @nprofile…5svm @nprofile…dgga @nprofile…p287
Dear Sarven, I'm happy to forward this important issue to the Sci-K 2025 organisers:
@nprofile…efpv @nprofile…jkrk @nprofile…7lxc
@nprofile…p287
#scik2025 #semanticweb #semweb #knowledgegraphs

2025-04-14 08:54:08

5th International Workshop on Scientific Knowledge: Representation, Discovery, and Assessment (Sci-K 2025)
📢🪘📢 Call for papers is OUT!
https://sci-k.github.io/2025/#call-for-papers
#AI #knowledgegraphs #semweb #semanticweb #networkscience #cfp #iswc2025 @nprofile…5ac4 @nprofile…5svm @nprofile…dgga @nprofile…p287
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/335/467/234/688/770/original/61d614d59288f4ed.png

2025-04-12 10:29:32

Back to business … but Espresso first! 😋
#excellentespresso #academiclife #PortDeSoller #islasbaleares
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/324/513/119/579/836/original/6c54b6bc34713de6.jpeg

2025-04-11 09:29:39

While relaxing and focusing at a yoga retreat and subsequent workations on the beautilful Islas Baleares just before the semester start in Karlsruhe. Taking inspiration from nature and pondering about how to include this into my life, my research and my teaching. CU soon!
#workation #academiclife #retreat #yoga #Nature #goats#mallorca
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/318/586/221/670/160/original/5bca33c6c61d11ad.jpeg

2025-03-26 07:51:52

Greetings from the FIZ Karlsruhe Research Retreat at Königstuhl, 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
@nprofile…5svm @nprofile…dgga @nprofile…ly42 @nprofile…6xz7 @nprofile…m0pk @nprofile…sqs0 @nprofile…lz4a @nprofile…vvu2 #semanticweb #knowledgegraphs #AI #llms #nlp #innovation #designthinking
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/227/630/935/446/529/original/27785df02e9a26aa.png

2025-03-24 10:46:03

Arrived at Königstuhl for our FIZ Research Retreat with 40 participants from all our different departments
@nprofile…5svm @nprofile…dgga #heidelberg #retreat #academiclife #research
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/216/995/378/490/057/original/8ee768930706b2b9.jpeg

2025-03-24 08:14:02

On my way to our 2 days FIZ Research Retreat in Heidelberg on top if the Königstuhl mountain.
@nprofile…5svm @nprofile…dgga @nprofile…6xz7 @nprofile…m0pk @nprofile…2qy8 @nprofile…vvu2 @nprofile…lz4a @nprofile…sqs0 @nprofile…p287 #heidelberg #academiclife
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/216/358/913/877/748/original/6f4b1ce292c45d0d.jpeg

2025-03-21 16:33:10

Back from a two days retreat of the FIZ executive management team in Pleisweiler-Oberhofen located in the sunny Southern Palatine, where spring has already arrived!
@nprofile…5svm #researchdatamanagement #rda @nprofile…ehge @nprofile…ly42 @nprofile…9488 #NFDI #LeibnizGemeinschaft #pfalz
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/201/370/880/015/230/original/c65aea3e53119e98.png

2025-03-12 13:21:06

Today in Heidelberg at E-Science Days 2025 we are conducting the Workshop on Information Infrastructure in the Era of AI: opportunities and challenges
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/149/663/489/209/707/original/fa976d09fc9d4e5e.jpeg

2025-03-07 13:03:48

Our colleague Hidir Arras from patent4science research is co-organizing the 6th PatentSemTech Workshop at #SIGIR2025 in the beautiful city of Padua, Italy! Call for Papers is open 'til April 23: http://ifs.tuwien.ac.at/patentsemtech/
Submit your cutting-edge research, case studies, and demos exploring #AI, #NLP, and #TextMining innovations applied to #IP and related domains.
@nprofile…5svm #informationextraction #datamining #ir
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/121/282/318/577/585/original/939e0f025e5a03de.png

2025-03-02 14:48:03

Dear @nprofile…szvf, we are very happy to see that you are deploying a QLever-based SPARQL endpoint. Would you probably mind to increase your cache size as this simple 2-hop query doesn't work:
SELECT ?p ?o ?pp ?oo WHERE {
<https://dblp.org/rec/books/acm/19/X19> ?p ?o .
OPTIONAL { ?o ?pp ?oo . }
}
https://sparql.dblp.org/n9kCi4
Thank you very much!! :)
#semanticweb #sparql #knowledgegraph #bibliography #qlever
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/093/372/744/862/980/original/9fea8a178a13a4a2.png

2025-02-27 07:28:47

Deadline extension for the SemDH 2025 Int. Workshop on Semantic Digital Humanities has been extended to March 15, 2025!
Submission is open for paper and panel contributions: https://semdh.github.io/
#semanticweb #eswc2025 @nprofile…9azt #dh #digitalhumanities #culturalheritage @nprofile…60an @nprofile…wdev @nprofile…vvk4 @nprofile…3x5w @nprofile…apf6 @nprofile…yewj @nprofile…vmra #AI #responsibleAI #reproducibleAI #llm
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/074/669/867/239/841/original/1325794c899b7fd6.png

2025-02-25 16:29:26

- reply

@nprofile…xth5 @nprofile…3ex2 @nprofile…0h6c
Of course age is not a limit to apply and to participate. But beware, most participants will be younger than 30 years and it will be an intense program including sports (yoga in the morning for everybody and a running group for the runners) :)
However, tutors/keynoters will participate in all activities, and some of us are also already 50+ ;-)

2025-02-25 13:25:54

Natural Scientific Language Processing Workshop (NSLP 2025) co-located with ESWC 2025 in Portoroz, Slovenia (1/2 June 2025)
https://nfdi4ds.github.io/nslp2025/
Deadline: 6 March 2025.
We also host three exciting shared tasks: MESD (Metadata Extraction from Scholarly Documents), ReadMe2KG (Github ReadMe to Knowledge Graph) https://nfdi4ds.github.io/nslp2025/docs/readme2kg_shared_task.html
FoRC (Field of Research Classification)!
#nslp2025 #eswc2025 #llm #nlp @nprofile…uv2f @nprofile…60an #NFDIrocks @nprofile…sn7p @nprofile…5svm @nprofile…2qmm @nprofile…m0pk
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/064/748/130/156/453/original/a08383b9a39a7193.png

2025-02-24 11:43:24

Today at the #NFDI-MatWerk strategy meeting at IWM/KIT in Karlsruhe. That huge hot-water bottle outside IWM is so me right now after yesterday's election...
#NFDIRocks @nprofile…sn7p @nprofile…5svm @nprofile…yhct @nprofile…rx9n @nprofile…q6wp #mse #ElectionDay #karlsruhe
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/058/659/327/239/805/original/f124e56f2cd02aa2.png

2025-02-19 13:20:46

Our DiTraRe Leibniz science campus has now its own community on Zenodo:
https://zenodo.org/communities/ditrare/records
If you are interested in the Digital Transformation of Research (DiTraRe), you will find our publications and presentations there.
#ditrare #LeibnizGemeinschaft @nprofile…5svm @nprofile…dgga @nprofile…yhct #digitalization @nprofile…xpzd @nprofile…8lxu #AI #AIethics #AIact #research @nprofile…vvu2 @nprofile…m0pk @nprofile…2qmm
https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/030/734/028/342/245/original/5e5792444958041d.png

2025-02-17 13:04:11

Dear colleagues at @nprofile…yhct, please consider to sign this petition to disinvite #noAFD from KIT's 200 years celebration event.
https://www.openpetition.de/petition/online/offener-brief-an-das-kit-praesidium-afd-von-festakt-zum-200-jubilaeum-des-kit-ausladen
This party should not be invited to an academic celebration at a German university, as its positions and statements have been criticized as racist, xenophobic and anti-democratic, which is contrary to the values of academic freedom, tolerance and openness to the world that universities represent.
#antifascism @nprofile…mrzk @nprofile…5svm

2025-02-12 15:11:57

Together with my wonderful colleagues from the @nprofile…uv2f consortium at the NFDI Interim report Symposium at @nprofile…ldlk in Bonn.
@nprofile…zrjl @nprofile…7met @nprofile…7tz6 @nprofile…ffsv @nprofile…guz3 #NFDIrocks @nprofile…sn7p @nprofile…5svm #ai #rdm
https://cdn.masto.host/sigmoidsocial/media_attachments/files/113/991/540/738/238/406/original/ba06599f75cd9a90.jpeg

2025-02-11 15:34:10

The #NFDIMatWerk team together with Torsten Schrade @nprofile…60an and York Sure-Vetter @nprofile…sn7p at the poster session of the DFG NFDI interim report Symposium.
@nprofile…ldlk @nprofile…5svm #mse #Materialwissenschaft #NFDIrocks @nprofile…dgga @nprofile…lz4a @nprofile…2qy8
https://cdn.masto.host/sigmoidsocial/media_attachments/files/113/985/967/241/682/852/original/9bdd7764315fbc2f.jpeg

2025-02-11 11:51:56

Today defending presenting and defending the interim report of#NFDIMatWerk consortium at DFG NFDI interim report Symposium in Bonn together with @nprofile…am0y and @nprofile…aaph
@nprofile…sn7p @nprofile…5svm #Materialwissenschaft #mse #KnowledgeGraphs #NFDIrocks
https://cdn.masto.host/sigmoidsocial/media_attachments/files/113/985/085/197/523/687/original/6fb19ffb56e20f36.jpeg

2025-02-07 15:14:10

Nice podcast with Andreas Hotho on the effects of the DeepSeek hype for AI and AI research in Germany (unfortunately only in German)
Andreas Hotho (Uni Würzburg) & Toni Wagner (vAudience), "Was bedeutet der DeepSeek Hype für KI in Deutschland?"
https://lnk.to/ABZ-38-deepseek-hype
#podcast #german #AI #generativeAI #llm #DeepSeek #chatgpt #openai #meta
https://cdn.masto.host/sigmoidsocial/media_attachments/files/113/963/253/357/918/151/original/308978f22c3eec16.png

2025-01-24 11:13:12

🌟 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 @nprofile…5ac4 @nprofile…dgga @nprofile…6xz7 @nprofile…w704 @nprofile…lz4a @nprofile…dun0
https://cdn.masto.host/sigmoidsocial/media_attachments/files/113/883/012/512/145/018/original/9bbd4deb38768820.png

2024-09-27 07:06:37

In the very last #ISE2024 lecture, we were discussing the limits of machine learning and #AI. The "Paperclip Maximizer Problem" is one of the dystopian scenarios that might occur if final goals and instrumental goals are diverging...
#dystopian #generativeAI #llms @npub1j86…utv2 @npub18vw…9ngv #aiart
https://cdn.masto.host/sigmoidsocial/media_attachments/files/113/208/237/595/159/969/original/ff81f147a37278f5.png

2024-06-12 09:14:46

Today, we started the chapter on #knowledgegraphs in the #ise2024 lecture with the classic example of "I am not Spock" 🖖
lecture slides: https://drive.google.com/file/d/1gYAWcA6FACQSjPSMz41vcD9SWb9QgfA7/view?usp=drive_link
#knowledgegraphs #llms #semanticweb #spock #startreck #generativeai #aiart
https://cdn.masto.host/sigmoidsocial/media_attachments/files/112/602/860/416/851/237/original/4db0b4c4d1247c45.png

2023-06-09 06:49:25

In the last #ise2023 lecture we learned about the subtleties of the RDF Turtle serialization format which we will also need as the basis for SPARQL and OWL encoding.
#knowledgegraphs #semanticweb #lecture #rdf #turtle #creativeAI #stablediffusionart #AIart
https://cdn.masto.host/sigmoidsocial/media_attachments/files/110/512/894/889/727/385/original/36c66fd406ccd6fd.png