Cross-Country Skiing, Snowshoeing, Ice Skating

Tijdens de maakavonden van Meet Je Stad soldeer je je eigen meetkastje dat temperatuur, luchtvochtigheid en fijnstof\* kan meten. Het solderen is geschikt voor iedereen: van beginner tot expert! Daarnaast bieden we begeleiding, dus hoef je niet bang te zijn dat je er niet uit komt. Ter deelname betaal je €15 voor de materialen. Vaak lukt het niet om al het soldeerwerk binnen één avond af te krijgen, maar dit is geen probleem; tijdens onze volgende maakavonden kun je langskomen om je werk af te maken. Inmiddels zijn er in de stad Utrecht nu zo’n 150 mensen die hun eigen meetkastje hebben gesoldeerd. Als je kastje af is wordt hij geregistreerd en kun je hem bij jou thuis ophangen/neerzetten. Hierbij krijg je instructies zodat je de juiste locatie kunt kiezen en je metingen zo betrouwbaar mogelijk zijn. Als het dan eenmaal hangt kun je via de kaart op de [website van Meet Je Stad](https://meetjestad.net/index3.php?loc=Tb) bijhouden welke metingen je kastje neemt: zo kun je bijvoorbeeld zien op welke momenten het bij jou het warmst is en vergelijkingen maken met waardes van andere meetkastjes. Dat kan door middel van [deze tool](https://mjs-datavisualisation-fez7kynngq-ez.a.run.app/) die je helpt om grafieken te maken. Dan kan je er achter komen hoe jouw omgeving ervoor staat in vergelijking met de rest van de stad. Meet Je Stad organiseert ook kennisavonden met gastsprekers die vertellen over hitte, fijnstof en andere burgerinitiatieven in de stad. Dit zijn ook gelijk geschikte momenten voor deelnemers om met elkaar in discussie te gaan over hun metingen en ondervindingen. Zo hopen we een netwerk van betrokken inwoners te creëren en meer te weten te komen over de milieuomstandigheden in de stad! *\*De fijnstofsensor is optioneel en kost 20 euro extra. Indien je deze bij je meetkastje wilt moet je deze via een draad met een stroombron binnen 15 meter kunnen verbinden.* **Organisatie:** Milieucentrum Utrecht (MCU) in samenwerking met de Makerscommunity HaHaHo. **Locatie:** Bibliotheek Neude, Huis van Actief Burgerschap (begane grond) **Kosten:** 15 euro voor materiaalkosten, 20 euro extra voor fijnstofsensor. (Meet-up suggereert bij het aanmaken van een account dat een betaald abonnement vereist is. Dit is niet zo, op de pagina waar gevraagd wordt om een abonnement te kiezen staat rechts bovenin de optie "Ga door met het gratis plan".) *Bij te weinig aanmeldingen kan de workshop afgelast worden.*

We are excited to announce our next Utrecht JUG meetup on **April 20, 2026,** hosted at the **Kamer van Koophandel.** Join us for an evening focused on the future of software development, where AI-driven, agentic systems are becoming an integral part of how we build and operate applications. In the first session, **Soham Dasgupta** will demonstrate how AI agents can power autonomous DevSecOps pipelines; from detecting vulnerabilities to generating fixes and validating them through CI. This hands-on talk offers a practical look at building self-driving security workflows with tools like GitHub Copilot. After the break **Raphael de Lio** explores how memory works in both humans and AI agents. By connecting insights from cognitive science to real-world engineering challenges, this session sheds light on how to design more reliable and context-aware AI systems. Join us for an evening of practical insight, new ideas, and great conversations. Please join us and RSVP! Because of the limited number of seats, please keep your RSVP up-to-date, so we can welcome someone else if you can't make it. *** ## Timeschedule 17:00 Doors open 18:00 Food & Drinks 19:00 Agentic DevSecOps: Autonomous Security Pipelines with AI Agents & Agentic Workflows by Soham Dasgupta 20:00 Break 20:15 The Anatomy of Memory in Humans and AI Agents by Raphael de Lio 21:15 Drinks # Giveaway 1 JetBrains licence *** # Talks ## Agentic DevSecOps: Autonomous Security Pipelines with AI Agents & Agentic Workflows What if your security pipeline could find vulnerabilities, file issues, write fixes, run CI, and request human approval — all autonomously? In this hands-on session, we start with a polyglot microservices repo that has zero security tooling and progressively build a fully autonomous agentic DevSecOps pipeline using GitHub Copilot. You'll see how AI agents perform repo-wide security assessments, how custom instructions shape agent behavior across the SDLC, and how agentic workflows chain dependency scanning, SAST, and test coverage checks into a self-driving loop: scan → auto-create issues → Coding Agent fixes → CI validates → AI code review → human approves. We'll also build custom Copilot agents for IaC security scanning and use GitHub's agentic workflow capabilities to generate recurring security reports — no human trigger required. Walk away with a working, repeatable pattern for embedding autonomous AI agents and agentic workflows into every stage of your DevSecOps lifecycle. *** # The Anatomy of Memory in Humans and AI Agents Artificial intelligence does not need to copy the human brain to advance, yet cognitive science still offers useful guidance. As agentic applications grow, understanding how humans store and retrieve information can help us design agents that act with greater context and reliability. This talk connects human memory to the practical challenges of building AI agents with memory. We will review the main types of memory in the brain, revisit a landmark case in neuroscience, and relate these ideas to how large language models process information. We will also look at the real difficulties of taking agents to production, where choosing what to store and how to retrieve it becomes the core challenge. Participants will learn: \- How insights from cognitive science can guide agent design \- The key forms of human memory and their relevance to AI \- What neuroscience reveals about the limits of large language models \- The main obstacles of deploying agents with memory in real systems \- How our work at Redis led to an open\-source\, production\-ready agent memory server \- Practical ways to improve memory in AI agents This session offers both conceptual clarity and concrete tools for building more capable agentic systems. *** # Speakers ## Soham Dasgupta Soham is a technology enthusiast working at Microsoft as a Solution Architect, with over 19 years of experience in software programming, designing, and architecture which includes on-prem, cloud-native applications, and web-based conversational application design. *** ## Raphael de Lio Raphael De Lio is an AI and Software Engineer at Redis with over eight years of experience spanning multiple industries and countries. He is passionate about distributed systems and specializes in Java, Kotlin, and building scalable, high-performance software with a growing focus on reliable, distributed agentic systems. What drives him is bridging the gap between software engineering and AI engineering, bringing the hard-won knowledge of building distributed, scalable systems into the world of AI where those foundations are often missing but matter most. Originally from Brazil, Raphael spent six years in Portugal before making the Netherlands his home, where he also helps organize the Dutch Kotlin User Group. He loves blending code, community, and creativity to help developers build better systems faster, and with a lot more fun along the way.

Time for our biweekly peer Satsang gathering! This is an open, equal and low-key gathering for spiritual seekers from all walks of life to get together, talk, feel connected and grow. The gathering will last for about two hours. Bring questions, thoughts, or just your presence. We'll see what unfolds once we're there. If you're interested but can't make the currently indicated time, the event is full or you have any other questions, get in touch with me at thijshugenholtz@gmail.com and we'll see what we can do! Location: Buurtcentrum Hart van Noord, Trumanlaan 60 Utrecht but the entrance is opposite Geallieerdenlaan 24

A great ride along the Vecht and Gein rivers. You will love this route. Please ride single file along the winding river as there can be cars around each corner. **Route:** https://connect.garmin.com/modern/course/441606271 GPX: https://drive.google.com/file/d/17-T_pT_GH3QKSFcH1WWgfArvxSdAkVzO/view?usp=sharing **Afterwards:** Drinks at Polder https://maps.app.goo.gl/tbt5DDG7YLU3uWvaA **Rules:** \- Download the route to your cycling computer so you can always find your way home \- Make sure to arrive on time \- Before you ride\, decide as a group how you want to ride: you can split up in a fast and a slow group or stay together\, but make sure to discuss what pace you are going to ride and whether you are going to wait if someone is slower than the group\, or not\.

If you are living in The Netherlands, by now, you may well have noticed the amount of open water. If you enjoy cycling in the city, you may wish to feel safer as you navigate the bridges and canals. And you may also want to get ready for visiting the beach, pools or the many lakes this summer. Learning how to swim takes approx 1 year and it all starts with the very first lesson. New comers enroll via our website and pay € 30,50, this is the first lesson and a goody bag. After the class you agree with the personal swim coach how to continue to obtain your final objectives. Enrolling is only possible via [www.your-personal-swim-coach.nl ](https://www.your-personal-swim-coach.nl/)hence a rvsp via meetup is not enough.

Samen sporten, gewoon voor de fun, elke week een divers programma, met allerlei verschillende sporten. Je hoeft niet de beste te zijn, maar wel zin hebben om samen te spelen en te leren. Tijdens een training doen we verschillende spelletjes, basketbal, voetbal. volleybal, spikebal, honkbal. Kom je ook, de bal ligt bij jou!! Eerste keer meedoen is altijd gratis, daarna kan je beslissen of dit voor jou is, of niet!! Dus kom een keer proberen. Kan je niet op deze dag, we sporten ook op andere dagen nl Zondag om 9:30 of Maandag om 20:30 Stuur mij een berichtje als je op die dagen een keer wil proberen! The amount of people rsvp'd to this game doesn't match the real number of people at the event, as Meetup is only used for promotion purposes.

New Year, New Sport! 🏐 ​Whether you've never played volleyball before or it’s been many years since you last hit the court, you are very welcome to join our Beginner Group! ​We train every Monday at 9 PM at Gymnasium Bibian Mentel in Zeeburgereiland. ​Come learn the basics, get moving, and meet new people in a fun, relaxed environment. ​Get more info here: ​WhatsApp Group: https://chat.whatsapp.com/EnPEK1bHLiTGdpqz6Vtbm4 ​Instagram: @brazucavolley

**3D Workshop** * **Ontwerpen met Fusion360** * **Scannen in 3D** * **Het gebruik van 3D printers** **Je bent nu welkom in de nieuwe locatie NewTechPark** Je kunt ook online aan deze fysieke bijeenkomst deelnemen. De bijeenkomst is dan op de locatie te volgen. Als je [hier](w.j.put@hccnet.nl) vooraf een mailtje stuurt kun je dinsdagavond tussen 19.00 en 20.00 uur inloggen met Jitsi voor vragen, of ter kennismaking met hcc!3D. Online neem je deel aan de bijeenkomst met [https://wij.hcc.nl/3D](https://wij.hcc.nl/3D) [(Alleen toegang als je zichtbaar bent met voor- en achternaam. )](https://wij.hcc.nl/3d)

## **🌊 Marbling Workshop — Utrecht \(\[Booking via link\]\(se book via the link: https://artools\.nl/product/marbling\-workshop/\)\)** ## **Colour, water, and chance.** ## In this 2h hands-on marbling workshop, pigments float on water and are transferred onto paper — creating patterns that can’t be fully controlled or repeated. It’s a slow, tactile and slightly hypnotic process, where “happy accidents” are part of the experience. **What to expect:** – work directly with colour on water – explore movement and flow – create multiple one-of-a-kind prints – guided but open-ended session You don’t aim for one perfect piece — you create many, each shaped by timing and chance. Details: 🕒 Utrecht 2h **📍 Utrecht** **💶** €70 All materials included No experience needed **⚠️**RSVP on Meetup does not confirm your spot **👉**Please book via the link: https://artools.nl/product/marbling-workshop/

Hi all, We’re back at Mick O’Connells and ready for another strong evening! We’ve got our own space again. Walk in, turn right at the bar, head past the dart boards, and you’ll find us in the side room. We've introduced a simple rotating format that gives you the chance to actually speak with everyone in the room. Short, focused conversations, good energy, and a lot more fun than it sounds. We’ll throw in a few conversation topics to get things going, but how you use the evening is entirely up to you. Come with intention, or don’t. Talk business, find clients, meet future partners, make friends, or just unwind with people who get it. We’re all building something, and we all have to roll with the punches. Only rule: you’re an entrepreneur, freelancer, or about to become one within the next 3 months. If not… the clock starts now ;) Try to arrive on time so we can kick things off properly. Can't find us? Look for the grey Gnome. He’ll guide you better than any sign ever could. See you there.

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#This meetup is around a third-party organizer (Focus Filmtheater): you can either purchase your ticket online or right before the session. **Seats are numbered**# **Title**: L'engloutie **Language**: French **Subtitles**: English **Length**: 98 min **Director**: Louise Hémon **More info**: https://www.focusarnhem.nl/agenda/lengloutie-2/ **Ticket link**: https://www.focusarnhem.nl/tickets/143042/ **Synopsis**: On a stormy night in 1899, Aimée, a young republican schoolteacher, arrives in a snowbound hamlet on the remote edges of the French Alps. Despite the villagers’ mistrust, she’s determined to shed light on what she sees as their dark beliefs. As she gradually becomes part of the community, a sensual vertigo begins to grow within her. Until the day an avalanche claims the life of a first mountain dweller. **How it works**: I will be at Focus around 18:30, where we can meet before the movie starts. You can message me to find us. Screening starts at 19:00. After the movie, we can have a drink together. Hope to see you soon!

Ready for a night of music, laughter, and fun? Join us at Thunderwing Brewery for Music Bingo — a lively twist on classic bingo where songs replace numbers and good vibes are guaranteed! RSVP to secure your spot. Text Renee (614-257-9389). (Headcount needed to make sure staffing can accommodate the group) Arrive early to get a seat - **bring a camping chair for extra seating.** Often the brewery has food trucks or you can bring in your own food. Bonus - You can bring your dog!

⛳ **Tuesday Golf League – Registrations Open!** Join our 2-Player Scramble league with 15 men and 15 women, featuring new partners every week. 📅 Every Tuesday, April 21–Aug 18 ⏰ 5:15 PM – 8:00 PM 📍 Champions Golf Course (3900 Westerville Rd) 💲 Pricing: • 12 weeks – $450 • 9 weeks – $345 YOU MUST SIGN UP AND PAY USING BELOW LINK TO RESERVE YOUR SPOT: [Tuesday Golf - 2026 - Calendar - Columbus Ski Club](https://columbusskiclub.org/content.aspx?page_id=4002&club_id=686961&item_id=2870039&actr=3) Great way to meet new golfers, mix up teams weekly, and enjoy competitive fun all season long. Questions - contact Bob Kaplan 614-286-8463 [gah97@aol.com](mailto:gah97@aol.com)

Please join us the 3rd Wednesday of each month to learn more about the Columbus Ski Club and what we have to offer. Pizza, wings and a variety of appetizers provided. We are a non-profit organization founded in 1958 with over 800 members. The club has grown beyond the single mission of providing members with not only quality skiing events but also year round social and sport activities. Our gatherings are an opportunity for members and non-members to interact and learn about the many activities offered such as euchre, billiards, volleyball, pickleball, tennis, bowling, golf & softball leagues along with ski and non-ski trips. Our members also plan group activities such as visits to wine tastings, bike trips, comedy clubs, concerts, plays and local sports games, etc. CSC membership is not required to belong to the Meetup group. Membership is required in order to participate in most club activities (CSC member). However, anyone (21 and over) is welcome at our meeting gatherings which consist of checking out our current activities and socializing. The annual dues for club membership are $35 with the membership year from September 1st – August 31st. [https://www.columbusskiclub.org/content.aspx?page_id=60&club_id=686961](https://www.columbusskiclub.org/content.aspx?page_id=60&club_id=686961)

Short North Street Skates return Saturday, April 4 and we’re excited to get back rolling together. These weekly rollouts are a chance to move through the city as a group, build community, and create more visibility for skating and small-wheeled movement in Columbus. Details: Meet: 1160 N High St 9:30 AM meet 10:00 AM rollout All wheels welcome We’ll be skating through the Short North and surrounding areas at a steady, social pace. Routes will use a mix of streets and bike lanes, so comfort navigating the city is helpful, but you don’t need to be an expert. If you’ve been meaning to come out, this is a great place to start. Come solo or bring a friend!

Get ready for a fun night with amazing food, great energy, and even better company! 🥰✨ 🍽️ Portia’s Café — 6:30PM 🛼 Skate Zone 71 — 8:30PM Come join us for delicious vegan food and/or roller skating — it’s totally up to you! Whether you come for the food, the skating, or both… you’re in for a great time 💗 📍 Portia’s Café 4424 Indianola Ave Columbus, OH 43214 📍 Skate Zone 71 4900 Evanswood Dr Columbus, OH 43229

We'll hike 3.4 miles on the Killdeer and Yellowlegs Trails - both out and back gravel trails. If we want more mileage we can repeat an out and back. Pace of around 3.5 mph, no one left behind and those who want to go faster sure can! As always optional lunch after. This is the second Metro Park in the lineup for me - with 21 to go (plus more are being added).