Mainframe Computing

*Talk by Abraham W.* Martin-Löf's meaning explanations provide an approach to understand mathematical statements as statements about functional computer programs. Furthermore, meaning explanations can be used to justify the inference rules of intuitionistic type theory. *As usual, there's mingling at the local bar after the talk.*

**Guests: Registration on email is required before attendance** Guests are most welcome to join our meetings, but attendance must be registered by email to [copenhagen@toastmasters.dk.](http://copenhagen@toastmasters.dk.%2A%2A/) Please come 10 minutes before the meeting start. We start at exactly 18:00. Welcome to ***Copenhagen Toastmasters Club*** Looking to improve your speaking and communication skills? Ignite your career? Gain the confidence to speak up? You’ve come to the right place. **Our meetings for 2026 from April to June:** • Wk 15: 7. april • Wk 17: 21. april • Wk 19: 5. may • Wk 21: 19. may • Wk 23 2. jun. • Wk 25 16. jun. **Our history** The *Copenhagen Toastmasters Club* was established in June 1996 by a group of dedicated people. We are the first Toastmasters club in Denmark. We are part of the Toastmasters International which is a nonprofit organisation that helps people to improve public speaking. **Our goals** *Copenhagen Toastmasters Club* will give you the skills and confidence you need to express yourself effectively in any situation. Toastmasters is the most efficient, enjoyable and affordable way of gaining great communication skills. You'll learn how to: * Formulate and express your ideas effectively * Be more persuasive and confident when giving presentations * Improve your one-on-one dealings with others At *Copenhagen Toastmasters Club*, you'll get to practice your skills by organising and conducting meetings and motivating others to help you. Become a better negotiator. Gain trust. Inspire your team. **Want to know more about *Copenhagen Toastmasters Club*?** [Facebook](https://www.facebook.com/CopenhagenToastmasters) , [LinkedIn](https://www.linkedin.com/company/2480522/admin/dashboard/) [Toastmasters International - global network](https://www.toastmasters.org/)

**👉Do Not Hesitate To Join the Waitlist — We will try to find room for everyone...👈** **This event is a memorial gathering, a wake** to the planned — but now cancelled [DevOpsDays Copenhagen 2026](https://www.devopsdays.dk/events/drink-up-2026/). **The event is free to participate - SEATS ARE LIMITED TO 40!** **Program (start 17:00 SHARP, arrive and be seated before that!)** * **Welcome** + 1 minute of silence for the deceased DevOpsDays * **Lessons from 10 years of Platform Engineering** by Kris Buytaert * **Table discussions** — "What the heck is going on in the DevOps Community right now?" * **Summary** on table discussions * **Outro** — The current status of the transformed Danish DevOpsDays Association and a glimpse into what the future will bring It ends at the "Workbar" no later than **19:00** but if we're still a decent crowd we will continue onward for a burger or a pizza. **Keynote:** [Kris Buytaert](https://www.devopsdays.dk/profiles/kris-buytaert/) is flying in from Belgium to deliver his planned Keynote [Lessons From 10 years of Platform Engineering ](https://www.devopsdays.dk/talks/lessons-from-10-years-of-platform-engineering/) **Post Mortem:** We had to cancel the planned two-day DevOpsDays conference, simply due to lack of interest from audience. This is the canary in coal mine; DevOps(Days) choked. Let's do a post mortem. Platform Engineering is the new DevOps — so we're told. *"No — that's Ops, not DevOps".* Where did all the *"You Build It You Run It"* hype go? We will kick off discussions on this topic at the tables - while you sip your funeral beer. **Phoenix rising:** — The Danish DevOpsDays Association has a new charter, new bylaws, a new purpose. We, the organizers, will lay out our plans for the future and encourage you to join. **Context:** [DevOps is Broken](https://www.devopsdays.dk/stories/devops-is-broken/)

Welcome to the first M-PUG session of the year as we kick off spring in Sweden! Join us for an evening of practical AI and PostgreSQL discussion, community, and good company. We'll be gathering at the ground floor of Minc, and whether you're a longtime member or joining us for the first time, we’re excited to reconnect with the community and start the year with an insightful session. **Title:** Boring is Better: Building RAG with PostgreSQL as a Vector Database **Abstract:** Retrieval-Augmented Generation doesn't need the shiniest vector database. PostgreSQL with pgvector gives you everything you need: fast similarity search, native indexing, and - most importantly - one less system to operate. We'll show how to build production RAG applications using the database you already know and love, without the operation complexity/overhead/hype of dedicated vector stores. See if PostgreSQL is the boring choice that makes sense for your team's AI development workflow. **Speaker:** Ali Jahangiri brings a decade of expertise with electron driven innovation - from atomic scale transistor fabrication, to physical AI solution development at Arduino and high performance computing systems. As a Machine Learning PhD candidate at Lund University and affiliated member of the ELLIIT (Linköping-Lund initiative on IT and mobile communication) centre of excellence, Ali is advancing the sustainable AI frontier by developing smaller, faster and more energy-efficient machine learning architectures. **Agenda** 17:15 - 17:30: Guest arrival 17:30 - 18:15: Presentation 18:15 - 19:30: Pizza and networking

Learn how to paint Mandalas with dots. Painting a mandala is a therapeutic artistic activity that helps you de-stress and calm down. When you paint a mandala, all your attention goes towards maintaining symmetry. You get engrossed in the patterns and get into the flow of creation. If done with an intention, painting a mandala lets you be in and enjoy the present. Membership costs 50kr a year [www.mindfulnesshome.se](https://mindfulnesshome.se) Contact: 070-355 41 91(Emma)

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.

Join us for an hour of writing! We’ve discovered that it’s strikingly helpful to write with other writers. See if it’s true for you at our Copenhagen Shut Up & Write! sessions. Be it a book, blog, script, essay, dissertation, résumé, melody, poem, or just plain work stuff, you are invited to write it with us. No one will see what you've written or give you unsolicited advice. Instead of just thinking about writing, come and get some real writing done. SCHEDULE: - 15 minutes of hellos and getting settled; maybe some quick intros. - Then, the timer starts! : writing for 1 hour. - After the hour is up... chat / take off / keep writing, if you're on a roll. OPTIONAL SOCIALIZING happens once the hour of writing is complete. Writing can be very solitary... connecting (and sometimes even commiserating) with other writers is a cool thing. It's best to be on time, but BEING LATE IS ALSO OKAY: just show up and get settled, then check in with us after the session. (We’ll be the ones with the small Shut Up & Write! sign.) If you were on time, please be willing to make room for the friendly latecomer. What Should I Bring? Whatever you need to be able to write! Bring earbuds/earplugs if you want to block the cafe’s overhead music or the occasional conversation by other patrons.

\#\# 🔐 **Registration** **IMPORTANT:** This event is free, but please register on the UXDX site so we can confirm numbers and manage access to the venue: [https://uxdx.com/community/community-copenhagen-2026-04-29/](https://uxdx.com/community/community-copenhagen-2026-04-29/) Join the **Copenhagen UXDX Community** for an evening exploring how teams can scale products more effectively while rethinking the role of UX in a changing landscape. This is a practical meetup for people across **Product, UX, Design,** and **Dev** who want to learn from real examples, challenge assumptions, and connect with others building digital products today. \*\*\* \#\# 📅 Agenda **16:45 to 17:00** \- Registration and networking **17:00 to 17:15** \- Welcome by UXDX Ambassador Hosted by Tasha Melchior, VP Product at Everway **17:15 to 17:45** \- Scaling Product Methodology from Startup to Scaleup\, Anneli Bartholdy **17:45 to 18:15** \- Networking and snacks **18:15 to 18:45** \- Will AI Kill UX? Tobias Jensen **18:45 to 19:00** \- Closing and networking \*\*\* \#\# ✨ **Talk 1:** Scaling Product Methodology from Startup to Scaleup **Anneli Bartholdy,** Head of Product, UBsend Most companies fail during the scaleup transition. For businesses whose success depends on digital products, the way Product works through discovery, design, development, and launch can make all the difference. In this talk, Anneli will walk through the key components of working with Product as a company grows, highlighting the questions, decisions, and actions that need to evolve at each phase. Drawing on case stories from European businesses, she will share where teams often get stuck, and what helps them scale more successfully. She’ll cover: How product ways of working need to evolve from startup to scaleup What changes across discovery, design, development, and launch The common risks that can derail product growth What successful teams do differently during the transition \*\*\* \#\# ✨ **Talk 2:** Will AI Kill UX? **Tobias Jensen,** UX Design Manager, Visma AI is changing the craft of design at speed, raising big questions about which skills will remain essential and what the future of UX will actually look like. In this talk, Tobias will tackle those questions head-on, using real-life examples from Visma e-conomic, Denmark’s largest accounting platform serving more than 270,000 customers. It is an honest look at what is changing, what still matters, and what designers should be thinking about now. He’ll cover: Which parts of UX are most under pressure from AI What skills and practices will continue to matter How AI is changing the day-to-day reality of design work What teams can take back into their own organisation \*\*\* \#\# About UXDX UXDX helps teams move from project delivery to empowered, autonomous product teams. We host global conferences and free community events that bring together UX, Product, Design, and Engineering to share how real teams build better products, faster together.

Important note: we will be changing venue every other week (from Main Library on Thursdays to Nørrebro Library on Fridays), so please check event details. **Dear Expat (or Dane!),** Looking for a job in Denmark? Whether you’re new to the country or seeking to advance your career, this session is designed to help you navigate the Danish job market with confidence. Join us for practical insights on: · Tailoring your CV for Applicant Tracking Systems (ATS) and Danish employer expectations. · Leveraging LinkedIn and networking strategies to uncover hidden job opportunities. · Understanding Danish workplace culture and what employers value most. This workshop is perfect for expats at all career stages, from newcomers to seasoned professionals. You’ll leave with actionable tips, a stronger network, and the tools to make your job search more effective. Looking forward to connecting with you, **Maria Depesova** Your Host & Expat Community Builder

Hello tout le monde! Le premier événement/ meet up ce fera ce Vendredi 1 er Mai à 16h30 à Studenthuset, un bar/ café étudiant dans le centre !! Rdv aux tables vers la scène au rez de chaussée.

Change: people don't resist change because they're difficult. They resist it because they're human. This evening we're exploring what's actually happening — biologically, socially, organizationally — when change meets people. And what that means for how we work with it. Join us for a Liberating Structures session on change, resistance, and why your nervous system might be smarter than your change plan.

We are looking forward to welcoming you to Rust meetup #67! This month is currently lacking a food sponsor, but there will be something to eat. RSVPs open a week before the meetup. The agenda for the night is outlined below: 18:05–18:15: Welcome! 18:15–19:00: Gary Coady: **Huskarl: A Modern OAuth2 Ecosystem** 19:00–19:45: Food Break, sponsored by the organizers (and/or you?) 19:50–20:35: Ahmad Sattar Atta & Sebastian Holmgaard: **From camel to crab: Compiling Async RaTT to WebAssembly with ComRaTT** 20:35-21:00: Closing and Cleanup. 21:00-???: Bar Make sure to bring your best energy for a cozy evening in great with other Rust enthusiasts, professionals and amateurs alike! We look forward to seeing you all! 🦀

New Host for the Meetup group and new horizon for the community. Join Mia for a drink and a discussion about how we can shape the group activity to give more value to the members and to AI development.

Hello all! To kickstart our Meetup group here I suggest to have a morning meet&greet for those of us available. I would like to invite you to our office in Bredgade, Copenhagen, and spend 20 minutes on our approach to measuring software greenness and introduce a research project we are part of, led by Aalborg University and Roskilde University: [GREENSQL](https://vbn.aau.dk/en/projects/green-digitalization-starts-in-the-database/). If you find this interesting, I will work on having the researchers come by our Meetup and give a status on current progress. That leaves about 40 minutes for discussion and general networking. If we have a lot of attendees (fingers crossed) I may have to change the location - please suggest alternative locations if you have one. All the best, Rasmus

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

It feels like we just saw each other 🤷. Join members of the local design and UX community for our monthly breakfast. For May we’re stopping in for Rooh’s popup breakfast/cafe concept. You know someone is getting the lobster yuzu croissant, and that’s not even the prettiest thing on the menu!.

We will show how to build custom agents with Microsoft Agent Framework. Attendees will learn how to build and custom host agents when Microsoft Foundry is not a viable option.

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

Join other experienced and aspiring agile coaches and professionals to: * develop and practice your coaching skills in a peer-to-peer environment * share current successes and challenges in your work environment and get support from each other * learn from each other, build better relationships and experiment with new ideas ***NOTE:*** Pre-registration is required for this event. **Please arrive 10 minutes early** to check in at the security desk.

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9