Nirmal Roy @_nirmalroy
🇮🇳 🇳🇱 🇺🇸 PhD @wisdelft. Trying to understand how people search on the web. Football/hiking extremist. Love nerd jokes. @amazonscience @pwc roynirmal.github.io Delft Joined September 2009-
Tweets318
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Thanks a lot @CharlotteHase! It was a great journey and one where I learned so much, all thanks to you!
Thanks a lot @CharlotteHase! It was a great journey and one where I learned so much, all thanks to you!
Last PhD defense in my former TU Delft lab in the books! @_nirmalroy defended his thesis "Exploring the effects of interactive interfaces on user search behaviour" with flying colours. Excellent thesis from an excellent researcher! 👏👏👏 research.tudelft.nl/en/publication…
Had a great time presenting our work “Hear Me Out: A Study on the Use of the Voice Modality for Crowdsourced Relevance Assessments” at @SIGIRConf. Interesting session and discussions! And yes I’m open to work and new opportunities🧑🔧🧑💻
👏📷📷 Gustavo's awesome thesis writeup on "Designing and Diagnosing Models for Conversational Search and Recommendation" can be found here: doi.org/10.4233/uuid:a…
👏📷📷 Gustavo's awesome thesis writeup on "Designing and Diagnosing Models for Conversational Search and Recommendation" can be found here: doi.org/10.4233/uuid:a…
Research design patterns as food for thought!
1/n: Today's coffee tastes lekker☕️! Our work 'Hear Me Out: A Study on the Use of the Voice Modality for Crowdsourced Relevance Assessments' is accepted at @SIGIRConf 🔊Congratulations to the amazing @AggieBalayn @maxwelld90 @CharlotteHase, couldn't have asked for a better team🍻
In number theory, a narcissistic number is a number that can be expressed as the sum of its own digits raised to the power of the number of digits.
Important note: February has 28 days (7 x 4). Each day has 24 hours (8 x 3). Each hour has 60 minutes (6 x 5 x 2). So February has 8! minutes. 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1.
Started my PhD with a pandemic, about to end it with a global recession. Is there a support group or something?
Small Obsidian plugin I wrote last night to make the creation of an arxiv.org paper note less tedious: github.com/chauff/paper-n…
The 2022 World Cup will never be forgotten 🎉
explainable recsys
A real hunter gatherer
Explainable Information Retrieval: A Survey 🔗: arxiv.org/abs/2211.02405
I am hiring a PhD student in the project LESSEN (lessen-project.nl) on conversational agents. It is a 4-year, fully paid position You will be embedded in @TMLeiden at @LIACS, @UniLeiden, supervised by me, and co-supervised by @fhasibi universiteitleiden.nl/en/vacancies/2… #NLProc
Our last talk for today is given by @_nirmalroy. Title of the presentation: Users and Contemporary SERPs: A (Re-)Invesrigation

Claudia Hauff 🇪�... @CharlotteHase
4K Followers 2K Following IR * Applied NLP * Applied ML. Spotify.
Sole Pera @DrCh0le
2K Followers 648 Following Associate Professor @wisdelft @tudelft, Misses Rosario, 🧉 Enthusiast, #RecSys #InformationRetrieval #IR4U2 #KidRec
Debasis Ganguly @debforit
845 Followers 406 Following Lecturer/Asst. Professor at the School of Computing, University of Glasgow (@UofGlasgow/@GlasgowCS/@IDAglasgow/@ir_glasgow)
Arthur Câmara @ArthurCamara
1K Followers 837 Following Applied IR & NLP Research @ZetaVector. Making search good | CS PhD @tudelft, ex-@naverlabseurope, @bloomberg | #T1D #ADHD | CNF✈️AMS (he/him)Avishek Anand @run4avi
672 Followers 502 Following Associate Professor @ TU Delft, Explainable information retrieval, efficiency and scalability in ir, Sports buff
Sean MacAvaney @macavaney
2K Followers 590 Following he/him · Senior Lecturer (Assoc. Professor) at @GlasgowCS @TerrierTeam · working at the intersection of IR&NLP · PhD from @Georgetown IRLab
Guido Zuccon @guidozuc
2K Followers 752 Following Professor at The University of Queensland, leader of @IELabGroup (https://t.co/yLTRjRQAWA), Information Retrieval researcher
Ivan Sekulić @puding_p
425 Followers 364 Following PhD from @USI_INF. Conversational Search, IR, NLP. 🐧
Andra ionescu @andradenisio
446 Followers 378 Following PhD Candidate @wisdelft @tudelft, supervised by @kAsterios and @RHai_nl Interested in #dataAugmentation #dataDiscovery #featureDiscovery #dataMarkets
Agathe Balayn @AggieBalayn
691 Followers 827 Following Postdoc researcher @TU Delft, and visiting researcher @ServiceNow. Researching harms (biases, unfairness, and others) caused by machine learning pipelines.
Webis Group @webis_de
720 Followers 387 Following Research group working the fields of Information Retrieval, Natural Language Processing, Data Mining, Machine Learning, and Artificial Intelligence.
Hamed Zamani @HamedZamani
3K Followers 1K Following Assoc. Prof. @manningcics. Assoc. Director of the Center for Intelligent Information Retrieval (CIIR). Interested in IR, NLP & ML.
Felipe Moraes @femoraesg
567 Followers 414 Following ML Scientist @bookingcom. PhD in Information Retrieval from @tudelft. Working on causal inference for search and recsys.
Harrie Oosterhuis @HarrieOos
1K Followers 321 Following Assistant professor at Radboud University. Research: ranking, machine learning, user interactions, IR. Ex-@Twitter-@Google-@irlab_amsterdam Opinions are my own.
Amin Bigdeli @amin_bigdelii
268 Followers 409 Following PhD Student at University of Waterloo | Interested in IR, NLP, and DL.
Dima El Zein @elzeindima
235 Followers 574 Following PhD candidate at @Uca_research @Laboratoire_I3S Teaching assistant @Uca_education Working on Search as Learning, Information Retreival and Cognitive Modeling
Ujwal Gadiraju @UjLaw
1K Followers 947 Following Assistant Professor @wisdelft @tudelft. Vice-chair @chinl. HCI | Crowd Computing | Human-centered AI | Conversational Interfaces | XAI | #TAFF
ACM CHIIR 2026 @ACM_CHIIR
2K Followers 566 Following CHIIR (“cheer”) is the ACM SIGIR Conference on Human Information Interaction and Retrieval. Next up: 22-26 March '26 in Seattle, WA, USA #CHIIR2026
Roberto Daugherty @RobertoDau18710
1 Followers 167 Following Recruiting webshell engineers to p enetrate websites, with a monthly salary of up to $100,000. If interested, please contact https://t.co/uE5BQGf7yM
ほしのきみこ @hoshinokim4623
57 Followers 3K Following
KittyHoover @1q273Jft4X9qn
77 Followers 7K Following
neo_4j @Neu2022Av
40 Followers 932 Following
KaySainsbury @421aT9mZ6Kf3ZUM
67 Followers 7K Following
lily @kounoakiko36922
61 Followers 4K Following
Stoned Ape X Machine ... @MachineElvesApe
464 Followers 2K Following Dope Ape living in tent in Redwoods - Terence McKenna - Mushrooms - AI - AI Art - Machine Elves Enthusiast - UBI UBI UBI UBI UBI UBI UBI UBI -
Peter Morales @PeterMoralesX
351 Followers 3K Following Founder, CEO of Code Metal. Interested in development at the edge? DM.
Abhisek Tiwari, PhD @abhisekti
105 Followers 588 Following Building Clinical AI Assistant | PhD in Computer Science || IIT Patna alum Ex. Prime Minister Research Fellow, Int at AI Inst of South Carolina, AccentureLabs
Vaishali Pal @VaishaliPal
65 Followers 162 Following
Ismail @ismail_sabei
261 Followers 1K Following PhD student @ The Uni of QLD, member of @IELabGroup | Lecturer @ Jazan Uni | Interested in IR | Searching in Chat Conversations SCC | Always Coffee
Dr Emma Nicol has lef... @emmanicolwork
761 Followers 2K Following No longer on X. Lecturer @strathcis University of Strathclyde. Human Computer Interaction. Information Behaviour. Own opinions. @[email protected]
geniusjoa @geniusjoa
850 Followers 4K Following La Seguridad no es cara, No tiene Precio“... Consultor en Seguridad de la Información / Soporte ante Incidentes de Seguridad Informática DFIR.
sho_dutta @DuttaSho
4 Followers 12 Following
Yaroslav Golubev @areyde
885 Followers 3K Following Research Administrator @JetBrains Research. Love writing papers and poetry, history, languages, and literally everything else. 俄然覺,則蘧蘧然周也。🦋
iglu-contest @ NeurIP... @IgluContest
265 Followers 294 Following IGLU: Interactive Grounded Language Understanding in a Collaborative Environment Ask any questions using: info AT iglu-contest DOT net
채원에밀리_Chaew... @Chaewonemily7
81 Followers 1K Following 예수의 전문적인 마약중독자 † Fed에서 기업가로 변신 서번트 리더 @instagram🇺🇸 채원 에밀리 #채원밀리 chaewon Emily
Milad Momeni 🦒 @milad1372
41 Followers 185 Following Ph.D. Student in HCI, IIR, and Human Centred AI @UofRegina C₈H₁₀N₄O₂
Serou @Serou559090
11 Followers 899 Following Follow me, maybe it's the beginning of our fate, we can talk
Sophie Fischer @sophie_fisch
213 Followers 214 Following PhD Candidate with @grill_lab_ai at @EdinburghNLP @InfAtEd. Former @UofGlasgow
Daniel Dobriy (Q11227... @semantic42
2K Followers 2K Following Knowledge Graphs Researcher @wuvienna & Programme Manager @KMA_HQ | #digitalhumanism #knowledgegraphs #ai | https://t.co/xoERSGOyvN
rlchar @rlchar9
144 Followers 2K Following
Orion Weller @orionweller
2K Followers 950 Following PhD student @jhuclsp interning @AIatMeta FAIR. Prev intern @GoogleDeepMind, @samaya_ai, @allen_ai. Research: LLMs, RAG, and IR
Shrikar @Shrikarhaha
216 Followers 3K Following Currently: Research @iiscbangalore Building: Explainable AI systems in Healthcare Interests: Startups, TechForGood, Product Loves: Physics,Poems,Football&Food
Domenico Bellomo @BellomoDomenico
416 Followers 2K Following Director of Bioinformatics @SkylineDx. I make a living applying machine learning to biological & medical data. Synthetic biology enthusiast.
Esra de Groot @EsraGroot
51 Followers 65 Following PhD student @TUDelft Human-AI Decision-making | Mental Health Apps
ART of Safety Worksho... @artofsafety2023
55 Followers 225 Following The ART of Safety: Adversarial testing and Red Teaming for Generative AI @aaclmeeting 2023 also related to @NibblerDataperf prompt hacking competition
Adversarial Nibbler C... @NibblerDataperf
66 Followers 223 Following Prompt hacking challenge finding safe prompts to T2I models generating unsafe images, supported by Kaggle, Hugging Face, MLCommons, Google, Harvard, Oxford, CMU
Charlie Clarke @claclarke
992 Followers 1K Following Building and evaluating IR, QA, and RAG systems. Humbly serving as one of the @ass_deans for @WaterlooMath.
Sheshera Mysore @MSheshera
1K Followers 1K Following Postdoctoral researcher @Microsoft. NLP/IR Ph.D. from @umasscs. he/him/his.
SunRa @roy1696
8 Followers 196 Following Maths, Open Source, Trying to understand AI and how the AI systems work the way they work
Shashank Gupta @shashank27392
1K Followers 3K Following PhD candidate at @irlab_amsterdam | Prev. @AIatMeta (NYC '24, London '23), @Flipkart | Interested in ML & IR.
Philipp Christmann @PhilippChr97
95 Followers 122 Following PhD student at the Max Planck Institute for Informatics. Question Answering. Knowledge Graphs. NLP. Homepage: https://t.co/NGZ1EF85Fg.
PooyaKhandel @_pkhandel
200 Followers 269 Following PhD Candidate @UvA_Amsterdam A joint member of @irlab_amsterdam and PCS
Catherine Chen @catherineschen
185 Followers 228 Following CS PhD Candidate @BrownCSDept @health_nlp | Explainability, IR, NLP | ex-SWE at FreeWheel (she/her)
long @copermaxim
6 Followers 3K Following
Nilanjan Sarkar @nilan_blue
352 Followers 4K Following Unlearning in LLMs| M.E CS @bitshyd| Applied Scientist intern @AmazonScience IML| #recsys #nlp #nlproc #clang #compilers #llvm
Lucie Flek @lucie_nlp
4K Followers 4K Following #NLProc researcher, computer science prof @UniBonn Nothing new to see here in 2025. You will find my news via https://t.co/ms0AC3UfbJ #eXit
Arif Ahmad @arif_ahmad_py
535 Followers 7K Following We are in the world model era now. Prev. @GoogleDeepMind and @Nvidia
Mireia Yurrita @MireiaYurrita
109 Followers 122 Following PhD candidate at @tudelft | Marie Curie fellow at @Dcode_EU
Claudia Hauff 🇪�... @CharlotteHase
4K Followers 2K Following IR * Applied NLP * Applied ML. Spotify.
Fernando Diaz @841io
5K Followers 1K Following Associate Professor, CMU. Researcher, Google. Evaluation and design of information retrieval and recommendation systems, including their societal impacts.
Sole Pera @DrCh0le
2K Followers 648 Following Associate Professor @wisdelft @tudelft, Misses Rosario, 🧉 Enthusiast, #RecSys #InformationRetrieval #IR4U2 #KidRec
Debasis Ganguly @debforit
845 Followers 406 Following Lecturer/Asst. Professor at the School of Computing, University of Glasgow (@UofGlasgow/@GlasgowCS/@IDAglasgow/@ir_glasgow)
Nicola Ferro @frrncl
2K Followers 201 Following Information Retrieval, Digital Libraries, Evaluation - Full Professor in Computer Science at @UniPadova, leading @iiia_unipd #RussiaUkraineConflict #againstwar
Arthur Câmara @ArthurCamara
1K Followers 837 Following Applied IR & NLP Research @ZetaVector. Making search good | CS PhD @tudelft, ex-@naverlabseurope, @bloomberg | #T1D #ADHD | CNF✈️AMS (he/him)Avishek Anand @run4avi
672 Followers 502 Following Associate Professor @ TU Delft, Explainable information retrieval, efficiency and scalability in ir, Sports buff
Sean MacAvaney @macavaney
2K Followers 590 Following he/him · Senior Lecturer (Assoc. Professor) at @GlasgowCS @TerrierTeam · working at the intersection of IR&NLP · PhD from @Georgetown IRLab
Glasgow IR Group @ir_glasgow
1K Followers 137 Following Glasgow Information Retrieval Group @GlasgowCS
Guido Zuccon @guidozuc
2K Followers 752 Following Professor at The University of Queensland, leader of @IELabGroup (https://t.co/yLTRjRQAWA), Information Retrieval researcher
Jimmy Lin @lintool
15K Followers 843 Following I profess CS-ly at @UWaterloo about NLP/IR/LLM-ish things. I science at @yupp_ai and @Primal. Previously, I monkeyed code for @Twitter and slides for @Cloudera.
Ivan Sekulić @puding_p
425 Followers 364 Following PhD from @USI_INF. Conversational Search, IR, NLP. 🐧
Krisztian Balog @krisztianbalog
2K Followers 279 Following Professor of computer science @UniStavanger, leading @iai_group & Staff research scientist @GoogleDeepMind. Current focus: https://t.co/5JiH909fhx
Andra ionescu @andradenisio
446 Followers 378 Following PhD Candidate @wisdelft @tudelft, supervised by @kAsterios and @RHai_nl Interested in #dataAugmentation #dataDiscovery #featureDiscovery #dataMarkets
Agathe Balayn @AggieBalayn
691 Followers 827 Following Postdoc researcher @TU Delft, and visiting researcher @ServiceNow. Researching harms (biases, unfairness, and others) caused by machine learning pipelines.
Webis Group @webis_de
720 Followers 387 Following Research group working the fields of Information Retrieval, Natural Language Processing, Data Mining, Machine Learning, and Artificial Intelligence.
Hamed Zamani @HamedZamani
3K Followers 1K Following Assoc. Prof. @manningcics. Assoc. Director of the Center for Intelligent Information Retrieval (CIIR). Interested in IR, NLP & ML.
Felipe Moraes @femoraesg
567 Followers 414 Following ML Scientist @bookingcom. PhD in Information Retrieval from @tudelft. Working on causal inference for search and recsys.
Akari Asai @AkariAsai
19K Followers 870 Following Incoming Assistant Professor @SCSatCMU & research scientist @allen_ai. akariasai @ 🦋
Daniel Dobriy (Q11227... @semantic42
2K Followers 2K Following Knowledge Graphs Researcher @wuvienna & Programme Manager @KMA_HQ | #digitalhumanism #knowledgegraphs #ai | https://t.co/xoERSGOyvN
80s Footballers Agein... @80sAging
64K Followers 3K Following Branched out from just sharing 80s players but kept the name. Account run by @winstonwes
Orion Weller @orionweller
2K Followers 950 Following PhD student @jhuclsp interning @AIatMeta FAIR. Prev intern @GoogleDeepMind, @samaya_ai, @allen_ai. Research: LLMs, RAG, and IR
Charlie Clarke @claclarke
992 Followers 1K Following Building and evaluating IR, QA, and RAG systems. Humbly serving as one of the @ass_deans for @WaterlooMath.
Esra de Groot @EsraGroot
51 Followers 65 Following PhD student @TUDelft Human-AI Decision-making | Mental Health Apps
Eugene Yang @EYangTW
598 Followers 413 Following Information Retrieval | Research Scientist at HLTCOE @JohnsHopkins | CS PhD from @Georgetown | from Taiwan
Sheshera Mysore @MSheshera
1K Followers 1K Following Postdoctoral researcher @Microsoft. NLP/IR Ph.D. from @umasscs. he/him/his.
Ellie Anderson @ellieanderphd
16K Followers 729 Following Assistant Professor of Philosophy at Pomona College | Co-host of @Overthink_pod. Phenomenology/poststructuralism, hermeneutic labor, feminist philosophy of love
PooyaKhandel @_pkhandel
200 Followers 269 Following PhD Candidate @UvA_Amsterdam A joint member of @irlab_amsterdam and PCS
Philipp Christmann @PhilippChr97
95 Followers 122 Following PhD student at the Max Planck Institute for Informatics. Question Answering. Knowledge Graphs. NLP. Homepage: https://t.co/NGZ1EF85Fg.
Yubin Kim @SIGIR2025 @yubink_cs
347 Followers 71 Following Chief Science Officer at Vody. Search/RecSys expert. Let's talk about: information retrieval, recsys, genAI for e-commerce. @LTIatCMU grad; ex-@etsy
Catherine Chen @catherineschen
185 Followers 228 Following CS PhD Candidate @BrownCSDept @health_nlp | Explainability, IR, NLP | ex-SWE at FreeWheel (she/her)
Sophie Fischer @sophie_fisch
213 Followers 214 Following PhD Candidate with @grill_lab_ai at @EdinburghNLP @InfAtEd. Former @UofGlasgow
TREC Tip-of-the-Tongu... @TREC_ToT
35 Followers 3 Following TREC Tip-of-the-Tongue Track focuses on known-item identification where the searcher cannot recall a reliable identifier (i.e., "It’s on the tip of my tongue…")
Michael Bendersky @bemikelive
2K Followers 367 Following @ Databricks / ex-Google DeepMind / ex-Google Research Interested in research at the intersection of IR & AI.
Gabriel Bénédict @le__gab
208 Followers 157 Following Generative AI @ Amazon, trying things with loss functions, metrics and diffusion
Mireia Yurrita @MireiaYurrita
109 Followers 122 Following PhD candidate at @tudelft | Marie Curie fellow at @Dcode_EU
Norman Knyazev @NormanKnyazev
85 Followers 183 Following PhD Candidate at @Radboud_Uni: Statistical Biases, Machine Learning, RecSys | Previously: Research Intern @Snap, Applied Science Intern @AmazonScience.
Lora Aroyo @laroyo
3K Followers 1K Following Research Scientist @ Google DeepMind @NYC, former Professor in Computer Science; Safety of GenAI, Eval Metrics for GenAI, HCI, Crowdsourcing, Human Computation
Yashar Moshfeghi @YashMosh
701 Followers 846 Following Associate Professor in Data Science at Department of Computer and Information Sciences at Univeristy of Strathclyde
Alisa Smirnova @AlisaS_PhD
7 Followers 15 Following Ph.D. student at the University of Fribourg, eXascale Infolab && Researcher at Toloka AI
Jeff Dalton @JeffD
3K Followers 833 Following Associate Professor in CS, lead of @grill_lab_ai. PhD from CIIR@UMass Amherst. Research on the future of digital assistants and IR. Formerly Google, Twitter.
Lisa Koeman @Lisa_Koeman
364 Followers 156 Following Principal UX Researcher @ElsevierConnect · Previously @gdsteam and @uclic · PhD in HCI from @UCL · Making things out of stuff
Sam Way @samfway
874 Followers 535 Following Professional curious person. Tweets about computational social science, data visualization, network science, science of science, musicology.
Debora Nozza @debora_nozza
4K Followers 4K Following Assistant Professor at @Unibocconi in @MilaNLProc group • Working in #NLP, #HateSpeech and #FairnessML • She/her • #ERCStG PERSONAE
Jonathan Kamp @jb_kamp
69 Followers 92 Following Computational Linguist; PhD Candidate @CLTLVU; Interpretability in NLP; Argument Mining
Enrico Palumbo @enricopalumbo91
267 Followers 496 Following Research scientist @ Spotify Research, previously @ Amazon Alexa. Search and Recommendations using Language Technologies. Opinions are my own.
Vikram Voleti @VikramVoleti
805 Followers 1K Following PhD candidate @Mila_Quebec @UMontreal, currently a Research Intern at @Meta. Ex-Intern at @Google, @Unity. In the job market. Computer vision + Deep learning
Zhaoyang Wang @zhaoyangwang_
777 Followers 7K Following CS PhD student at the University of Birmingham. Research interests: Automated Machine Learning (Bayesian optimization), Reinforcement Learning.
Florian Mai @_florianmai
2K Followers 1K Following Junior Research Group Leader @ Uni Bonn AI Alignment & Reasoning
Katerina Margatina @katemargatina
806 Followers 657 Following applying science @aws agentic ai 🤖 previously spent time @sheffieldnlp @aiatmeta @coastalcph @ecentua
Giselle Pu @giselle_pu
223 Followers 550 Following Assistant Professor at Beijing Normal-Hong Baptist University. PhD from @PSUCOMMGradEd Recommender system and AI researcher.
Barbara Rentroia Pach... @barentroia
48 Followers 368 Following PhD candidate in Bioinformatics at @ErasmusMC. Into machine learning/statistics applied to health.
Lijun Lyu @LijunLyu
92 Followers 129 Following PhD candidate at TU Delft, in interpretable ML, IR, NLP.
Anthropic @AnthropicAI
644K Followers 35 Following We're an AI safety and research company that builds reliable, interpretable, and steerable AI systems. Talk to our AI assistant @claudeai on https://t.co/FhDI3KQh0n.
Konstantina Palla @konstantina_pll
2K Followers 1K Following ML & all things research. Senior research scientist @SpotifyResearch. Affinity workshops chair @NeurIPSConf 2023. Previously @MSFTResearch. All opinions my own.
Emad @EMostaque
290K Followers 24 Following Distributing Intelligence @ii_posts. Founder @StabilityAI.
Eric Wastl @ericwastl
30K Followers 0 Following Created https://t.co/Y9jHxpfLdQ, https://t.co/2Cg3Tc4ozv, https://t.co/BSHyKj3GKD, https://t.co/Ru4QENCKrM; Principal Architect @ACVAuctions
Justin Svegliato @justinsvegliato
1K Followers 372 Following Senior Research Scientist @Microsoft and @UCBerkeley. PhD @UMassAmherst. Building AI assistants with planning, RL, and LLMs.
Mira Murati @miramurati
370K Followers 574 Following Now building @thinkymachines. Previously CTO @OpenAI