Search, Information Retrieval

*Talk by Claes Worm* `tatr` is a new tool written in OCaml for recursively traversing file-hierarchies and finding all indented trees of text that match your queries. Its design tries to be simple, powerful, elegant and general. A common action on the CLI is to search for all the files within some directory that contain a specific regular expression - e.g. using a mix of `find` and `grep` or tools that do both like `ripgrep`. These tools only match on lines, not on “sets of lines” or “related lines” or “trees of indented text” - `tatr` does this and filters the trees to only show the parts you are interested in. What formats can you query? Anything that contains lines of text that are related to each-other based on indentation. E.g.: * bullet-point based notes like markdown, wiki, org-mode or plain text * notes with *tags* * code that contains comments * structured configuration-formats like json, sexp, etc. When used with your notes; you suddenly get the opportunity to not only structure your notes by linking pages in a graph or tree - but also by tagging and logically relating “verbal arguments” via indentation. [https://github.com/rand00/tatr](https://github.com/rand00/tatr) [https://r7p5.earth](https://r7p5.earth) *As usual, there's mingling at the local bar after the talk.*

Join us in the next AZUG meetup and learn how to tune your cloud database. **Hands‑on tutorial on Azure Database for PostgreSQL Flexible Server parameter tuning** PostgreSQL exposes hundreds of configuration parameters, but only a few dozen truly determine performance and resource efficiency. Tuning them correctly is notoriously difficult due to complex interactions and workload‑specific behavior. Traditional approaches—manual tuning or generic rule‑based tools—often fall short. In this practical workshop, participants will learn the fundamentals of server parameter tuning and get hands‑on experience using heuristics‑based open‑source tools such as PGtune to achieve meaningful performance improvements. We'll explore which parameters matter most, how PGtune's heuristics work, and why they influence performance. The session concludes with an introduction to DBtune Community Edition , an AI‑powered agentic tuning engine that blends heuristic rules with modern AI and ML techniques to deliver smarter, workload‑aware optimization. **Prerequisites: Bring your own laptop with a command‑line shell (eg, PowerShell).** If you are using a company laptop, please whitelist \*\* [http://app.dbtune.com%2A%2A./]app.dbtune.com\*\*. **About our Speaker:** Dr. Luigi Nardi is the founder and CEO of DBtune, a leading company driving advancements in AI, database systems, and cloud computing. Previously an associate professor of AI at Lund University and a research staff at Stanford University, Luigi's expertise centers around Bayesian methods and optimization theory and practice. Luigi's journey includes a post-doctoral position at Imperial College London and a role as a software engineer at Murex, following his Ph.D. program in applied mathematics at Université Pierre et Marie Curie in Paris in 2011. Luigi is a public speaker and prolific researcher, having co-authored more than 50 peer-reviewed papers at leading venues in machine learning and computer science. **Sponsors:** https://www.dewise.com/ https://codenode.dk/

Join us for an inspiring session exploring the frontier of "constructive" democratic technology. As traditional mechanisms for citizen engagement struggle against polarization and an algorithm-driven attention economy, how can we build digital public infrastructure that actually brings people together? Digital deliberation provides a new framework for our democracy. Rather than focusing on division, these tools allow us to map underlying consensus and foster collective sense-making across society. In this meetup, we move beyond abstract theory to explore the practical ways the Finnish Innovation Fund (Sitra) has successfully deployed citizen participation at scale, and look ahead to the new European Civic Tech Hub. We will dive into: * **The Power of "Voxit":** How Finland successfully scaled this open-source platform across more than 120 societal dialogues, utilizing AI and statistical clustering to map "Uncommon Ground" and find consensus. * **From National Labs to European Impact:** Insights from massive citizen dialogues—such as the "What do you think about AI, Finland?" campaign—and how they directly shape public sector rulebooks. * **The European Civic Tech Hub:** How the ongoing work to build a centralized hub under the European Commission's *European Democracy Shield* aims to solve the biggest bottlenecks in civic tech adoption, from procurement to GDPR compliance. **About the Speaker & Moderator:** **Sanna-Kaisa Saloranta (Speaker)** is a Specialist and Democracy Team Lead at Sitra's International Programmes. She leads efforts to scale democratic innovations that support collective sense-making, actively working to bridge the gap between Finnish open-source success and the wider European digital ecosystem. **Michael Jensen (Moderator)**, Co-founder of DemAI, will host the session and guide the conversation, drawing on his expertise in democratic AI to bridge the themes of the presentation with our audience's questions. Come prepared for a constructive dialogue on how we can learn from these approaches to build a more transparent, resilient, and connected democratic future in Europe. We look forward to seeing you there!

Come join the cozy game audio community breakfast meetup at Ghost Ship Games on May 26th 08.00am - 10.00am CEST alongside the wonderful people of Audiokinetic - Damian Kastbauer and Alessandro Famà. Organized by Audiokinetic and Game Audio Denmark.

Fulfillment. Joy. – Do you know what it is? Do you feel it now? Many of us are living lives that have “just sort of happened”. We had a dream, a vision (maybe we still do) for what we wanted our lives to look like. Somewhere along the way, life took over and something else ended up happening. We made decisions, took a turn down a path, and now our life isn’t what we thought it would be. Or we’re living someone else’s life. Maybe it’s what our parent’s wanted for us. What we believe our partner or a potential partner might want. Or maybe it’s what we believe we need to do and have to be happy. I was one of these people. My life checked all the boxes for what I thought I needed in order to be happy. And still, I wasn’t. Join me for a coffee talk on what it means to live a Life By Design. Where your choices are deliberate and based on your authentic, true self. What you have to let go off to achieve this (hint: the notion that vulnerability is a weakness and feelings of fear and guilt) and who you will become in the process.

We are a group of people meeting on Tuesdays to socialize around cooking and eating together. Usually around 40-50 people. Many are international students, but also other people join. The foodclub exist independent of Meetup, we invite you because we have room for a few more people. The food is vegan and made from donated leftover veggies from a local greengrocery. The place has originally hosted leftwing activist groups, and many of the people joining are also involved in political groups. If you want to join for chopping and cooking, we will be doing that from 3 to 6 pm. It is possible to join part of the time. From 6:30 to 8pm we are serving food. Donation around 30 kroner. If you are helping out some hours, chopping, cooking or cleaning, you can eat for free. From 8 to 9 - 9:30 pm we are cleaning up the place. We hope to see you in our lovely foodclub <3

Booked pitch at Holmen. Pitch is booked until 22.30 💰 **Cost:** 10 kr Mobilepay: 9539SH Revolut: [revolut.me/frederwnn](https://revolut.me/frederwnn) Or bring Cash * Event begins at 20:15 * You must sign out no later than 9:00 same day * Spots are non-transferable (you cannot reserve a spot and send someone else in your place) * Members who follow the rules and attend regularly will be given priority **Be at the pitch at 20.15 sharp!** Minimum 14 players by midnight and we play! Otherwise the game is cancelled. We aim for 8v8. The game is naturally for everyone no matter gender, level or anything. We emphasise on having fun! That also means no risky tackles or foul language. Bring a white and a black t-shirt and a ball if you have one. **Last minute sign-off's** (Later than 9AM on the same day) or no-shows will be banned from the next games and be put in the no-show list. 3 Strikes and you're out for a full year - no exceptions

**𝗗𝗘𝗔𝗥 𝗪𝗢𝗥𝗟𝗗 – the international week-breaker** Your favorite after-work/after-uni bar night to connect, relax, and meet amazing people at ease. for context (as frequently asked): ***\- we are always many more people than sign up here on meetup as most traffic and updates happen on IG*** ***\- average age range is from 20\-30 \(everyone is welcome\)*** Yet another amazing year of Dear World the way we know it - together! At Bodega, we stocked up on board games to get cozy and competitive while social of course. 📸 IG @dearworldcph (for impressions from past events!) As the days are colder and shorter, we’re bringing the energy to our nights – with over 100+ at our bar nights and 200+ at our parties, 𝗗𝗘𝗔𝗥 𝗪𝗢𝗥𝗟𝗗 keeps growing! For almost 2 years now, we’ve been uniting Copenhagen’s international crowd (and locals) – countless nationalities, shining in different languages 🌍 Think easy-going conversation starters like flags, rotating chat charms & playful questions – all designed to spark great chats and eliminate any awkwardness. 📍 BODEGA DANZA, Flæsketorvet 13A, 1711 Copenhagen 🕖 When: starting at 19:00 (hosts & stickers until 22:00, the night continues however long you like) Let’s raise a glass, meet familiar and new faces, and break the week – together 🥂 𝗗𝗘𝗔𝗥 𝗪𝗢𝗥𝗟𝗗 The space for internationals and open-minded locals to connect in Copenhagen. Whether you’re looking to socialize, network, make friends, or simply vibe – just show up. Come solo or bring your crew – we’ve got you. Got questions? DM us on Instagram @dearworldcph or reach out to the host here. Let’s make Wednesdays the new favorite day of the week 🌇

✨We’re excited to invite you to a new Barrel AI 🐒🐒 event — this one is shaping up to be one of our most epic yet ✨ We’ll be given a presentation and speach by an eminent AI expert and ambassador, **Dr. Michael Green**, alongside our recurring **AI Release Radar**, where we highlight the latest AI/ML releases and news. As always, there will be great opportunities for networking — plus pizza and drinks. This event will also be hosted at our new home for future events: **Fyrtornet / Drivbänken**, right in the heart of Hyllie, Malmö. **📅AGENDA** 17:30 – 17:45 Arrival & initial networking 17:45 – 18:00 Welcome by Barrel AI organizers 18:00 – 18:20 AI Release Radar 18:20 – 19:00 Dr. Michael Green – Talk & Q&A 19:00 – 19:30 Pizza & networking **🚀 THE WARM-UP: AI RELEASE RADAR** Before the demo, we will kick things off with our AI Release Radar and scan the latest happenings in the AI community — LLM drops, AI/ML white papers, and the news that actually matters to AI Engineers & Developers. **🎓 SPEAKER INTRODUCTION** Dr. Michael Green builds AI systems designed to make decisions under uncertainty, using Bayesian machine learning and probabilistic AI—because real-world environments rarely provide perfect information. Models that fail to account for uncertainty often become fragile when deployed in complex settings. He is the founder of two Copenhagen-based AI companies applying these principles where decision-making truly matters: *Alviss AI* and *AI Alpha Lab.* Alviss AI is a marketing science platform that helps organizations optimize advertising, media investments, and growth through a combination of probabilistic modeling and modern machine learning. AI Alpha Lab is a research-driven initiative focused on financial markets and systematic investing, leveraging probabilistic AI and quantitative methods. Their AI-driven fund, trading on Nasdaq, has achieved performance surpassing many index funds. Michael is also a strong advocate for digital and AI sovereignty, with a focus on strengthening EU-driven AI ecosystems—a topic he will also touch upon. 🗣️**TALK DESCRIPTION** At the upcoming Barrel AI event, Michael will take a deep dive into the technical architecture behind his systems, exploring how uncertainty-first and physics-inspired neural networks are applied in high-stakes environments. Financial markets are unforgiving—there are no second chances, no re-runs with a different random seed. In his talk he will tell the story of building the model that now runs AI Alpha Lab’s fund, and the hard lessons learned along the way. It starts, as these things often do, with 36 million going up in smoke 🔥💸.

You’ve thought about it. Reflected on it. Maybe even talked about it… But how do you actually *move forward*? In this practical, hands-on workshop, we focus on one thing: 👉 turning ideas into small, concrete actions You’ll: • Choose a direction that feels interesting (not perfect) • Turn it into a simple, real-world experiment • Plan when and how you’ll take your next step No big life decisions. No pressure. Just a clear, doable action you can take right away. 🧭 This is the 3rd session of a 6-part series—but you’re welcome to join even if it’s your first time. Progress starts small.

We are looking much forward to welcome you to Rust meetup #68! This month's meetup will be hosted by Microsoft. Microsoft are located at: Kanalvej 7, 2800 Kongens Lyngby As usual, RSVPs open a week before the meetup. The agenda for the night is outlined below: \- 18:05\-18:15: Welcome \- 18:15\-19:00: Mossa: **THE RUSTY ROAD TO EPIDEMIOLOGY** \- 19:00\-19:50: Food Break\, Sponsored by Microsoft \- 19:50\-20:35: Game Show 2 \- 20:35\-20:50: Raffle \- 20:50\-21:00: Clean Up\, Leave \- 21:00 \- ???: Bar Make sure to bring your best energy for a cozy evening in great with other Rust enthusiasts, professionals and amateurs alike. Let's Rust up! 🦀

# Tired of dating apps or surface-level social events? This is different. Relational Labs is a guided connection experience for singles who want more honest, playful, emotionally intelligent interaction — without performance, pressure, or endless small talk. This is not speed dating. Not networking. Not “pitch yourself to strangers.” It’s a facilitated relational container rooted in psychology, emotional intelligence, attachment work, social dynamics, nervous system awareness, and real-world human connection — made practical enough that you can actually live it instead of reading another 50 books about it. ## What happens • A 2-hour guided online relational experience • Real-time connection exercises designed to create authentic interaction • A format that adapts in real time to whoever is present • Optional participant-led in-person continuation afterward • WhatsApp connection thread after the session ## This may be for you if: • You’re tired of shallow or repetitive social spaces • You want deeper connection without forced intimacy • You enjoy personal growth, psychology, communication, or relational work • You’re open to meeting people in a more intentional way ## Important This experience runs with whoever is present and takes its own shape each time. Sometimes expansive. Sometimes intimate. Both are the real thing. Booking happens through our website. 👉 Reserve your spot: [https://consciousconnectionsclub.com/join](https://consciousconnectionsclub.com/join) Optional in-person continuation: same day or within 48 hours depending on the city Most people come alone. People often leave surprised by how quickly strangers can feel human, warm, honest, and real. Sometimes awkwardness turns into ease. Sometimes curiosity turns into chemistry. Sometimes people simply remember what it feels like to actually connect again.

Join us for another evening of deep dives into data engineering! This time, we are hosted by **[Heyra](https://heyra.io/)** for two talks that explore the practical side of the "Agentic" shift in data workflows and the high-performance internals of data transfer with Apache Arrow. As always, there will be food, drinks, and plenty of time to network with fellow data engineers in the Copenhagen community. Based on the style of your previous events and the details provided, here is a draft for the upcoming **Agentic data engineering, beyond the hype** *Kilian Tscherny, Lead Data Engineer @ Heyra* Data engineering is changing fast, and the teams getting ahead are the ones rebuilding their workflow around agents instead of just bolting them on. In this talk, Kilian will cover how the team at Heyra has adapted to this shift, sharing real-world examples of how agentic workflows can move beyond the hype to provide actual architectural value. **Taking Flight: Zero-Copy Data Transfer at Scale with Apache Arrow Flight and Friends** *Anders Bogsnes,* *Head of Investments & Trading Engineering @ Nordea Asset Management* We all love Apache Arrow in our DataFrames and DuckDBs - but have you considered how the data is ending up on your machine? Arrow Flight and friends was designed as a way of enabling end-to-end native Arrow communication and in this talk we will go through the motivations behind the Arrow Flight protocol, introduce some of the derived protocols, and we end by building an Arrow Flight server from scratch and demonstrating how to interact with that server from a client. **Agenda** * **18:00:** Doors Open & Networking * **18:20:** Welcome from Copenhagen Data Engineering & Heyra * **18:30:** Agentic data engineering, beyond the hype – Kilian Tscherny * **19:00:** Food, Drinks & Networking * **19:30:** Taking Flight: Zero-Copy Data Transfer at Scale – Anders Bogsnes * **20:00:** Networking & More Drinks

In May, we are reading [Eurotrash by Christian Kracht](www.goodreads.com/book/show/209567298-eurotrash). **Synopsis** Realising he and she are the very worst kind of people, our unnamed middle-aged narrator embarks on a highly dubious road trip through Switzerland with his terminally ill and terminally drunken mother. They try unsuccessfully to give away or squander the fortune she has amassed from investing in armament industry shares. Along the journey they bicker endlessly over the past, throw handfuls of francs into a ravine and exasperate the living daylights out of their long-suffering taxi driver. The crimes of the twentieth century are never far behind, but neither is the need for more vodka. *Eurotrash* is a bitterly comic, vertiginous mirror-cabinet of familial and historical reckoning. Kracht's novel is a narrative tour-de-force of the tenderness and spite meted out between two people who cannot escape one another.

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** TBD

Rev. Steven Clevenger is an ordained spiritualist minister with over 40 years experience as a Spiritual Healer, Clairvoyant and Spiritual Teacher, educated and trained at the White Lily Chapel. Rev. Siobhan Wolf Shaffer is an ordained spiritualist minister and certified medium and healer with over 20 years experience. She began her development in 1988 in Pennsylvania and continued when she moved to Ohio in 1998 where she studied at Rays of Lights Church with Rev. Steven Clevenger. Our full worship services consist of an inspirational lecture, healing meditation, and messages from the spirit world that serve to demonstrate evidence of eternal life. Please visit our Official Church Website (http://raysoflightchurch.com) for more information.

Most people use AI like a search box: they type one sentence, hope for the best, and get frustrated when the answer is generic, wrong, or useless. But getting better results from tools like ChatGPT, Claude, Gemini, and other AI systems is not about memorizing magic prompts. It is about learning how to give the AI better context. In this beginner-friendly session, we’ll break down how to make AI dramatically more useful by improving the way you communicate with it. You’ll learn how to give clearer instructions, provide examples, set constraints, ask for better output formats, and use follow-up questions to turn a mediocre answer into a genuinely useful one. We’ll cover practical techniques you can use immediately for work, learning, writing, coding, planning, research, and everyday problem solving. We’ll also touch on why these same ideas show up in more advanced AI systems, including RAG, agents, evaluations, and AI workflows. No technical background required. Bring your curiosity, your questions, and maybe one real task you wish AI was better at helping you with. **What you’ll learn:** * Why “better prompting” is really about better context * How to structure requests so AI gives more useful answers * How to use examples, constraints, and output formats * How to iterate when the first answer is not good enough * How these skills connect to more advanced AI workflows This meetup is for anyone who wants to move beyond basic ChatGPT usage and start getting more practical value out of AI. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.

## Candle Making Night at The Arcane Foundry \| Design Your Own Custom Candle **SPECIAL PROMOTION**: Buy 3 and get 1 Free! Step into The Arcane Foundry and create your own custom candle from start to finish. This is a laid back, hands-on experience where **you’ll blend fragrances, choose your vessel, and pour your own candle using 100% soy wax**. Whether you’re coming solo or with friends, it’s designed to be simple, creative, and a good time. We’ll walk you through the entire process, from picking your scents to choosing between a traditional cotton wick or a crackling wood wick. You can go with one fragrance or mix your own blend to create something completely unique**. No experience needed**, just show up and we’ll handle the rest. While your candle sets, feel free to hang out, play a game, explore the shop, or just relax and talk. Drinks and snacks are available, and the atmosphere leans into the **fantasy**, **dark academia**, and **gothic horror** vibe The Arcane Foundry is known for. Learn More: [Candle Making in Columbus, Ohio at The Arcane Foundry](https://thearcanefoundry.com/candle-making/) *** ### What to Expect: * Guided candle making experience * Choose your own vessel, wax, wick, and fragrance * 100% soy wax candles * Optional drinks and snacks * Time to relax while your candle cools *** ### Important Notes: * Please arrive on time so we can start together * Candles will need time to set before taking home * This is a beginner-friendly event *** ### RSVP Required Reserve your spot on Meetup to lock in your seat. **Candle Making** (includes vessel, your choice of wick, wax, scented oil, labels and lids) 5oz Glass Jars $15 8oz Candle Tins $25 12oz Glass Candles $35 12oz Amber Jars $40 16 oz Skull or Jack o Lantern Candle Mugs $65 (Limited Edition!) **All materials included. You just bring yourself (and your drink of choice).** **Payments accepted:** * Credit Card * Venmo: @Daclaud-Lee * Cashapp: $DaclaudL

Join us as we get together to see Paul Rudd in the latest comedy-drama-musical from John Carney, POWER BALLAD! The film follows a washed-up wedding singer, a fading boy band singer and a stolen hit song. Here’s a description, trailer and plan for this event: DESCRIPTION: Rick, a washed-up wedding singer, and Danny, a fading boy band star, bond over music and a late-night jam session. When Danny turns Rick's song into a hit, Rick sets out to reclaim the recognition he believes he deserves. Power Ballad is written/directed by John Carney, the master of the modern musical and creative mind behind Once, Begin Again and Sing Street! It stars Paul Rudd, Nick Jonas, Peter McDonald, Marcella Plunkett, Havana Rose Liu and Jack Reynor. BUZZ & ACCLAIM: The film premiered to rave reviews at this year’s Dublin International Film Festival where critics call it “a sure-fired crowd-pleaser” that “just might be the feel-good hit of the year!” Others say, “Paul Rudd delivers a career-best performance in this charmer” that’s both “hilarious and deeply moving!” SUMMER OF ICE CREAM, VOL 2: SHAKE NO. 8! Ranked the #1 Ice Cream Shop in Columbus in 2024, this is the perfect place to kick off our Summer of Ice Cream and grab a sweet treat after the show! Their menu features an array of traditional, specialty and vegan shakes, hot cocoa, and more! You can check out their full menu here: [https://www.shakeno8.com/menu.php](https://www.shakeno8.com/menu.php) PLAN: We’ll plan for a 7pm-ish showing and will meet in the lobby area about 20 minutes before the show. Once showtime is announced, advance ticket purchase is advised! Once you have yours, please list your seat number in the Comments section of this event. We'll head to nearby Shake No. 8 immediately following the show! Should be a fun one, Dan