Kettlebell Training

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

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.

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\.

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

**Bitcoin Meetup met Crazy Pool!** Deze maand organiseren we iets leuks: voorafgaand aan de meetup (voor wie dat wil) spelen we Crazy Pool bij Timestamp op de Korenmarkt. Crazy Pool lijkt op minigolf, maar je speelt het met een keu en een bal die je door verschillende obstakels moet stoten. De speeltijd is ongeveer 45 minuten. Aansluitend eten we bij Flor Fina. Je kunt ook na het diner aansluiten als je alleen voor een drankje wilt komen. De Bitcoin Meetup is geschikt voor zowel beginners als ervaren bitcoiners. Stel je vragen en praat mee over de nieuwste ontwikkelingen in de wereld van bitcoin. Wil je meedoen met Crazy Pool of mee-eten? Laat het ons even weten, dan houden we daar rekening mee bij de reservering. * 16:30 — Crazy Pool @ Timestamp (Korenmarkt) * 17:30 — Diner @ Flor Fina (Korenmarkt) * 19:30 — Drinks @ Flor Fina (Korenmarkt) ## English Bitcoin Meetup with Crazy Pool! This month we’re doing something fun: before the meetup (for those who want to join) we’ll play Crazy Pool at Timestamp on Korenmarkt. Crazy Pool is similar to mini golf, but you use a cue to strike a ball through various obstacles. Playtime is about 45 minutes. Afterwards we’ll have dinner at Flor Fina. You can also join later if you only want to come for drinks. The Bitcoin Meetup is suitable for both beginners and experienced bitcoiners. Ask your questions and join the conversation about the latest developments in the world of bitcoin. Would you like to play Crazy Pool or join us for dinner? Please let us know so we can account for it when making the reservation. 16:30 — Crazy Pool @ Timestamp (Korenmarkt) 17:30 — Dinner @ Flor Fina (Korenmarkt) 19:30 — Drinks @ Flor Fina (Korenmarkt) ## Deutsch Bitcoin Meetup mit Crazy Pool! Diesen Monat organisieren wir etwas Schönes: vor dem Meetup (für alle, die möchten) spielen wir Crazy Pool bei Timestamp auf dem Korenmarkt. Crazy Pool ähnelt Minigolf, aber man spielt mit einem Queue und stößt eine Kugel durch verschiedene Hindernisse. Die Spielzeit beträgt etwa 45 Minuten. Anschließend essen wir im Flor Fina. Du kannst auch später dazukommen, wenn du nur auf einen Drink vorbeikommen möchtest. Das Bitcoin Meetup ist sowohl für Einsteiger als auch für erfahrene Bitcoiner geeignet. Stelle deine Fragen und diskutiere über die neuesten Entwicklungen in der Welt von Bitcoin. Möchtest du bei Crazy Pool mitspielen oder zum Abendessen kommen? Bitte sag kurz Bescheid, damit wir es bei der Reservierung berücksichtigen können. 16:30 — Crazy Pool @ Timestamp (Korenmarkt) 17:30 — Abendessen @ Flor Fina (Korenmarkt) 19:30 — Drinks @ Flor Fina (Korenmarkt)

📍 Hilversum Station (center side, near AH to go), 10:30 → ~16:00 🚶‍♂️ ~3 km walk to park, ~3 km in park plus walk to the Proeflokaal De Serre (expect 6-8 km of walking in total) 🎯 Gooilust Bring: sketching gear, water/snacks, foldable chair or blanket to sit on, comfy clothes + extra layer. We’ll walk together from the station to Gooilust (~3 km), a large park around a mansion with plenty of beautiful spots to draw. We’ll spend 2–3 hours sketching in the park, with longer, relaxed sessions (30–60 min) and time to explore different views. Afterwards, we’ll walk past a farm (you can buy fresh milk, cheese, yoghurt or kefir — bring a bit of cash if you are interested) and continue to Proeflokaal De Serre for a drink, food, and a toilet break. From there, we’ll take the bus (line 6 or 106) back to Hilversum. No pressure — just draw and enjoy the outdoors 🌿✏️

Expand your visibility. Join a casual online hour to share you, your brand and business, and learn more about other business owners, locally and globally. Every session will close with gratitude and a mini creative activity, so have a pen and paper, tablet, or something available with which to write/create/draw. This usually occurs twice monthly. **RSVP here via EventBrite [here](https://www.eventbrite.nl/e/you-and-your-brand-a-casual-networking-hour-tickets-1984283125243).** *-* *\*\*\*The only requirements are a minimum age of 18 years old,* *and **at least three attendees** to make it a worthwhile hour for everyone.\*\*\**

**📣** Welcome to **our second meetup in 2026!** Missed last meetup? Then its important you know that the Green Software Foundation and Sustainable IT Netherlands meetups, merged into one: **Sustainable IT Action NL!** Our mission is still to build connections around sustainable IT, exchanging ideas in a space for learning - and from there inspiring our members to take action. **🌿** We’re excited to gather peers who care about green, efficient, and responsible cloud practices on **April 23rd**, kindly hosted by **GreenPT** in Utrecht. **⏳ Time schedule** 17:30 – 18:00 Welcome 18:00 – 18:30 Vegetarian bites & networking 18:30 – 18:45 Kick-off & community introductions 18:45 – 19:15 Measuring the environmental impact of Google's AI - interactive explainer – Ozan Ogreden 19:15 – 19:45 Maryse Meinen– Holistic Digital Sustainability 19:45 – 20:00 Pitches 20:00 – 20:45 Drinks & networking **📍** 📍 **Location:** Plompetorengracht 4, Utrecht. GreenPT **❗ Capacity is limited to 50 participants, so please register early.** **✏️ Title: Measuring the environmental impact of Google's AI - interactive explainer** **💡 Speaker: Ozan Ogreden** **🍃 Abstract:** I built an "interactive explainer" that reproduces Google's methodology from Elsworth et al. (Measuring the environmental impact of delivering AI at Google Scale, Aug 2025, https://arxiv.org/abs/2508.15734). I'd like to share the explainer and my observations with the community. What stands out to me is a striking analytical (or rhetorical?) choice by Google team, which seems to be leading to a downward bias in headline-reported figures of their work. With the community, I'd like to attempt at two goals. One of them is a "narrow-minded goal", trying to find a charitable interpretation of what may have motivated Google's choices (specifically in the discussion related to measuring environmental impact of LLMs). The second is a goal with a more important perspective: Given our discussion, what's the best use of our time to move the needle in sustainable IT? *Ozan works at GreenPT:* GreenPT is a GPT-powered chat platform, and robust API, trusted by governments, businesses, privacy-focused organizations, and developers. Running on renewable energy and hosted in Europe for strict data protection, GreenPT gives you and your team the answers you need with a clear conscience and total transparency. [https://greenpt.com/](https://greenpt.com/) **✏️ Title:** Holistic Digital Sustainability **💡 Speaker:** Maryse Meinen **🍃 Abstract:** Less is More! This interactive session brings you inspiration and practical tips for embedding more sustainability all throughout your digital Product Development Cycle! Of interest for any role in the whole cycle of our process, from Product Owner to Agile coach and from business analist to tester! **📖 About the speaker:** Maryse works at the Rabobank improving our way of working and inspiring people to embed more sustainability in how we do Product Development. She is also a Stoic Practitioner. **🎤 Pitches** Our goal is connect people around Sustainable IT. In order to build more connections, we would like to offer the stage to everyone who wants to share something. We will timebox each pitch on 2 minutes exactly! Please note that this session is intended as a community gathering, so commercial pitches are to be avoided :) **🔎 Looking forward to seeing you there!** **👥 Organizing team** Tim van Bergenhenegouwen, Nick Batenburg (GreenPT, host) Wilco Burggraaf, Chris Stapper, Corina Milosoiu, Sabrina Hsieh (Sustainable IT Action NL)

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We are a real world Martial arts group. \ Called DO JUNG ISHU (the art of fighting) \ Based off of Jeet kune do we just continued where Bruce Lee left off. \ We have been around a while. \ We are donation based. Every week we get together and work technical skills and live pressure testing. \ Almost all of the instructors have been in everything from altercations in the real world to the ring and some still compete in the cage. \ If you want to take your skills up, improve your confidence, gain self defense skills, get in better shape, test yourself or just want to kill some time and possibly get hit a bit come on down. \ We will be located at 3923 N High St, Columbus, OH 43214 inside the whetstone rec center in the auditorium, upstairs in classroom B or outside in the grass between the playground and horseshoe area. our instructors are normally in a black and red art of fighting shirt \ if you can not find us call or text me at 6143570295 Saturday 1pm Wednesday 5:30pm From Age 16 and up. attendees under the age of 18 must have a guardian with them. \ \ You must have a free leisure card for the rec center and must be registered for our class specifically .\ Wear workout clothing \ Bring a MOUTHPIECE! \ WE HAVE GLOVES. \ Hope to see you soon :-).\ We are run off of donations. \ let me know if you have any questions :)

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.

We are a real world Martial arts group. \ Called DO JUNG ISHU (the art of fighting) \ Based off of Jeet kune do we just continued where Bruce Lee left off. \ We have been around a while. \ We are donation based. Every week we get together and work technical skills and live pressure testing. \ Almost all of the instructors have been in everything from altercations in the real world to the ring and some still compete in the cage. \ If you want to take your skills up, improve your confidence, gain self defense skills, get in better shape, test yourself or just want to kill some time and possibly get hit a bit come on down. \ We will be located at 3923 N High St, Columbus, OH 43214 inside the whetstone rec in the auditorium, center upstairs in classroom B or outside in the grass between the playground and horseshoe area. our instructors are normally in a black and red art of fighting shirt \ if you can not find us call or text me at 6143570295 Saturday 1pm Wednesday 5:30pm From Age 16 and up. attendees under the age of 18 must have a guardian with them. \ \ You must have a free leisure card for the rec center and must be registered for our class specifically .\ Wear workout clothing \ Bring a MOUTHPIECE! \ WE HAVE GLOVES. \ Hope to see you soon :-).\ We are run off of donations. \ let me know if you have any questions :)

# Polymarket Masterclass: Predict & Profit! 📈 Wanna profit from being right? Polymarket pays. 💰 This masterclass gives you the skills to turn astute predictions into tangible income. Unlock the secrets that separate winning traders from the noise. 🔥 **Limited Spots:** Secure your seat now. Don't miss out! ### ➡️ [GRAB YOUR SPOT](https://remoteready.io/product/Polymarket?city=Columbus&groupurlname=circle-of-professionals-mastering-ai-income&startgmtdatetime=2026-04-24T22:00:00Z) --- Inside, discover how markets, probability, and a little skill can boost your portfolio. **This event teaches:** * How to apply solid risk management, protecting your capital. * Frameworks for evaluating events and opportunities effectively. * What to look for when finding mispriced markets, where opportunity knocks. * Case studies that reveal the power of successful Polymarket trades. **Who Should Attend?** * Beginners eager for a well-defined Polymarket journey. * Keen minds looking to monetize real-world insights. * Strategic players who like to beat calculated odds. ⭐️ *"I see probability completely differently now. The risk section was game-changing!"* – Real Trader ⚡️ Transform your insight into income. Your future starts here. 🚀

Walk for Children - 2026 Save Soil Walkathon in Columbus 🌍 Over 52% of the world soil is degraded and scientists warn we may have only a few decades of fertile soil left. As Sadhguru shares, soil is a living system—and when it degrades, our food, health, and future are at risk. https://www.youtube.com/watch?v=hyT-6qiubd0 🚶‍♂️🌎This Earth Day, Join the Walk for Children-2026 SaveSoil 5K Walkathon here in Columbus and help raise awareness about soil for the future of our children! Every step you take helps: ✔️ 1. Raise awareness in your communities about protecting and restoring soil. ✔️ 2. Supports sustainable food systems. ✔️ 3. Helps secure our children’s future. 📅 Date: April 26, 2026 📍 Location: Scioto Audubon Metro Park Check-in address 400 W Whittier St, Columbus, OH 43215 ⏰ Time: 8:30 a.m. check-in event starts at 9:30 a.m. 👉 Register here: https://www.eventbrite.com/e/walk-for-children-2026-save-soil-walkathon-in-columbus-registration-1986596534713?aff=oddtdtcreator 👉🏼Free and Open to All. Share this message and bring your neighbours, friends & family along to celebrate our planet! Let’s make it happen!

Communication is everything in life You are only as successful as your ability to communicate. \- What if you could confidently talk to anyone? \- What if you had the ability to calmly control every conversation? \- What if you could close that sale\, ask for that date\, make new friends\, repair problematic relationships\, get that raise\, or effortlessly express any idea with confidence? You can! The secret to success relies on your ability or inability to effectively communicate. Attend a free seminar and gain a better ability to communicate. Hosted by the Church of Scientology of Central Ohio 1266 Dublin Road, Columbus, OH 43215 For more information, contact Rhiannon, the Event Host at 614-221-5024