Advanced Analytics

\# 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**: Mama’ku **Language**: Dutch **Subtitles**: English **Length**: 75 min **Director**: Sven Peetoom, Aldo Agaatsz **More info**: https://www.focusarnhem.nl/agenda/english-subs-mamaku/ **Ticket link**: https://www.focusarnhem.nl/tickets/146153/ **Synopsis:** The new documentary by Sven Peetoom (*Tussen Wal en Schip – Geruisloos Indisch)*. An intimate film about choreographer and dancer Cheroney Pelupessy, who makes the journey to Indonesia for the first time together with her mother in search of a hidden family history. **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!

Spots are limited: [https://tickets.voxxeddays.com/event/workshop-victor-rentea](https://tickets.voxxeddays.com/event/workshop-victor-rentea) **Build faster, smarter software with AI.** Join an exclusive, fully catered workshop with Victor Rentea on Agentic Engineering in a small, focused group of engineers. **Upgrade your development workflow to 2026.** A hands-on day on AI Coding Agents: prompt & context engineering, multi-agent orchestration, spec-driven development, and self-improving skills. Learn how engineers reach 2x–10x productivity and what it takes to get there. **For:** all engineers (backend, frontend, QA, data, ops) **Bring:** laptop with Claude Code + subscription (Pro is enough) **The agenda of the day** **Introduction** * LLM Fundamentals: Predictions, Tokens, Context Window, Compaction, System Prompt, Model vs Agent Harness * AI Pitfalls: Sycophancy, Hallucinations, Attention Dilution, Knowledge Cutoff, Premature Fixation * MCP Tools – best-of **Context Engineering** * Evolving a Token-Efficient Project Memory * AI Context Sharing across repos, teams, and company * Skills and Custom Agents that self-improve * Token-Efficiency Tricks: context hygiene, DRY, grep-logs antipattern **Prompt Engineering & Orchestration** * Prompt Engineering – does and dont’s * Brainstorm, plan & generate a non-trivial change with AI * Multi-Agent Orchestration Patterns: handover, reviewer, orchestrator, advisor,… **AI Guardrails & Security** * Functional Guardrails with State-of-the-art Acceptance Tests * ⁠Code Quality Guardrails AI cannot circumvent * ⁠Architecture Guardrails & Exact Summarisation * APIs, C4 Model, sequence diagrams * AI Supply-Chain Attacks Attacks and Agent Isolation Techniques **Date:** Wednesday, July 1st (09:00 - 17:00) **Location**: Utrecht (venue TBA) **Price**: € 395,- (incl. lunch & drinks) Spots are limited: [https://tickets.voxxeddays.com/event/workshop-victor-rentea](https://tickets.voxxeddays.com/event/workshop-victor-rentea)

Hi all! 🙂 On Wednesdays we welcome you to practice languages! If you want to practice a specific (uncommon) language, please send us a message so we can find some conversation partners for you on our mailing list! We hope to see you in Café Marktzicht! In the last year we had tables for the following languages: * Dutch * English * French * Italian * Spanish * Turkish\* * German\* * Portuguese\* * Danish\* * Norwegian\* * Russian\* * Arabic\* * Chinese\*\* * Japanese\*\* * Indonesian\*\* * * Most likely, but not every week present. \*\* - Rather rare ;-) If your language is not in this list, please let us know! We have a large database of Language Cafe visitors speaking 56 different languages! We might be able to connect you with a person that does speak the language you want to practice. In case you are not in our database yet, please use this form: http://goo.gl/forms/oSCn9Dn8m8

Welcome to our Volleyball community !! 🏐🎉 We are a community of volleyball enthusiasts who want to enjoy the game, improve their skills, and meet new friends. Our open play sessions offer a friendly, social environment where everyone can get some practice and have fun. Our sessions consist of mixed level play, however intermediate volleyball knowledge is mandatory. We try to have a balanced levels per team to ensure smooth play. If you aren’t familiar with basic volleyball rules and have no experience, sorry to say, but it's not your group. ❗❗ Meetup recently pops up their subscription option after you click on RSVP— you can dismiss it by clicking the "X" in the top left corner. ✅ RSVP & Attendance Attendance is limited to 14 people. If the RSVP list is full, join the waiting list—cancellations happen frequently. If the event appears full on the Meetup app, try using a web browser instead. ❌Cancellations & Refunds cancellation prior to 24h before the event, can be refunded. Can’t make it? Update your RSVP to "Not Going" ASAP so someone else can take your spot. 👟 What to Bring For your own safety and comfort, wear sport shoes and clothing (no street shoes—must change into sport shoes) and bring deodorant for ours. 💸 Payment & Contribution (€6.00 per person) Payment must be made in advance via Tikkie. Please only pay once you are added to the going list. In case you do not meet the payment deadline, you may be moved to the not going list. Looking forward to seeing you on the court! 🏐🔥 Let’s play, have fun, and make new friends!

**When:** Wednesday\, July 1st \| 🕒 Doors open at 19:00\, battle starts at 20:00 **Where:** De Ping Pong Club, Utrecht **Damage:** €4,07 (Buy your tickets in advance as spaces are limited! Secure your spot directly with the venue [here](https://shop.weeztix.com/37dc63d6-519c-11f0-a9cb-7e126431635e/events?shop_code=5rn36dck)!) **The Vibe:** I checked out De Ping Pong Club last week—it is an awesome location! They even have board games if you need a break from the action. I played there recently outside of a tournament, and let me tell you about the "athletic" standard: if you can hold two beers at the same time, you are officially qualified. This is not the Olympics, this is [around the table](https://depingpongclub.nl/agenda/). Leave your sports watch at home; this is a purely social event where your actual speaking time will easily outlast your playtime. **Pro Tip:** There are bonus points for costumes and alternative, non-paddle equipment. Fry-pans, textbooks, or flip-flops? Bring it. **Essential Training Routine:** If you actually want to take this seriously and lift the trophy, you *must* complete this strict two-step preparation: 1. Watch the [Balls of Fury Trailer](https://www.youtube.com/watch?v=HXR_NLDMUk8&t) to master the illegal underground table tennis mindset. 2. Blast [Armin van Buuren's Ping Pong](https://www.youtube.com/watch?v=Z8V5GfFeUDs) on repeat to get your hand-eye coordination synced to 138 BPM. **P.S.** Who is willing to play in my team **"ExBats"**? (Yes, a terrible pun merging "Expats" with *bat*, the Dutch word for racket). Drop a comment below if you're in!

Are you an **expat** in **Utrecht** and do you want to **learn how to swim?** Look no further! Dive into **personalized swimming lessons** with **Your Personal Swim Coach**. Whether you’re a beginner looking to learn the basics or an advanced swimmer seeking to refine your technique, our expert coaches offer **tailored sessions** that fit your needs. **De Kwakel** is a great pool close to the city center, has free parking, and is easy to reach by bus. It's an **amazing learning environment!** **Don't wait any longer:** **[Sign up for a Try Out Lesson!](https://www.your-personal-swim-coach.nl/product/try-out-adult-swimming-lesson/)** Want to learn more first? Go to our **[website](https://www.your-personal-swim-coach.nl/)** or **[schedule a call!](https://calendly.com/ypsc/new-meeting)**

Welcome to our Volleyball community !! 🏐🎉 We are a community of volleyball enthusiasts who want to enjoy the game, improve their skills, and meet new friends. Our open play sessions offer a friendly, social environment where everyone can get some practice and have fun. Our sessions consist of mixed level play, however intermediate volleyball knowledge is mandatory. We try to have a balanced levels per team to ensure smooth play. If you aren’t familiar with basic volleyball rules and have no experience, sorry to say, but it's not your group. ❗❗ Meetup recently pops up their subscription option after you click on RSVP— you can dismiss it by clicking the "X" in the top left corner. ✅ RSVP & Attendance Attendance is limited to 14 people. If the RSVP list is full, join the waiting list—cancellations happen frequently. If the event appears full on the Meetup app, try using a web browser instead. ❌Cancellations & Refunds cancellation prior to 24h before the event, can be refunded. Can’t make it? Update your RSVP to "Not Going" ASAP so someone else can take your spot. 👟 What to Bring For your own safety and comfort, wear sport shoes and clothing (no street shoes—must change into sport shoes) and bring deodorant for ours. 💸 Payment & Contribution (€6.00 per person) Payment must be made in advance via Tikkie (payment link will be send to you). Looking forward to seeing you on the court! 🏐🔥 Let’s play, have fun, and make new friends!

**Secrets management met OpenBao** Ben je geïnteresseerd in veilige opslag van secrets, privacy-first infrastructuur en open source security tools? Kom dan naar onze OpenBao workshop! Tijdens deze hands-on sessie duiken we in OpenBao, een open source secrets management oplossing. We laten zien je de verschillende Secret Backends van OpenBao configureerd en je door middel van policies kan bepalen wie (of wat) bij welk endpoint mag. Wat kun je verwachten: · Introductie tot OpenBao en de use cases · Installatie en basisconfiguratie · Praktische oefeningen met secrets en policies · Tips voor gebruik in je eigen projecten · Bonus: Configuratie van de OpenBao server met OpenTofu Neem je laptop mee als je mee wilt doen met de hands-on onderdelen (Linux of MacOS)

'THE SYMPATHIZER' by Viet Thanh Nguyen 'The winner of the 2016 Pulitzer Prize for Fiction, as well as seven other awards, The Sympathizer is the breakthrough novel of the year. With the pace and suspense of a thriller and prose that has been compared to Graham Greene and Saul Bellow, The Sympathizer is a sweeping epic of love and betrayal. The narrator, a communist double agent, is a man of two minds, a half-French, half-Vietnamese army captain who arranges to come to America after the Fall of Saigon, and while building a new life with other Vietnamese refugees in Los Angeles is secretly reporting back to his communist superiors in Vietnam. The Sympathizer is a blistering exploration of identity and America, a gripping espionage novel, and a powerful story of love and friendship.' ***Please read the book and join us for a lively discussion (in English) about the contents during our afternoon book club meeting.*** \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **PLEASE NOTE:** This is an IN-PERSON event in Amersfoort, The Netherlands. Please cancel your attendance in advance if you are unable to join, so that those on the waitlist can participate. Looking forward to seeing you all IN REAL LIFE then! Best regards, Sandra

**SUSE X I-share:** **Sprekers:** * [Hugo de Vries](https://www.linkedin.com/in/hugo-de-vries/) (Solution Architect) * [Bert Boerland](https://www.linkedin.com/in/bertboerland/) (Account Executive) * [Keown de Koning](https://www.linkedin.com/in/keowndekoning/) (Head of Channel) **Beschrijving** ''Tijdens deze sessie nemen we je mee door het brede SUSE-portfolio. Van de betrouwbare basis van SUSE Linux Enterprise Server (SLES) tot multicluster Kubernetes-beheer met Rancher en zero-trust containerbeveiliging met SUSE Security: SUSE biedt een compleet, onafhankelijk open-source ecosysteem van besturingssysteem tot cloudtechnologieën. We starten met de basis van SUSE en kijken terug naar de ontwikkeling van een Duitse open-source pionier in 1992 tot een wereldwijde enterprise speler van vandaag. Daarbij prikken we door de marketingverhalen heen en delen we praktijkvoorbeelden van organisaties die het volledige SUSE-portfolio inzetten om complexe infrastructuuruitdagingen op te lossen. Ook laten we zien hoe klanten de overstap maken van een Amerikaans georiënteerde infrastructuur naar een Europees alternatief. Tot slot geven we een live Rancher-demo, waarin je ziet hoe alle componenten naadloos samenwerken om moderne IT-landschappen te beveiligen, beheren en schaalbaar te maken. Wat kun je verwachten: * **Het volledige SUSE-verhaal** Hoe een Europese open-source pionier een complete technologiestack heeft opgebouwd – van operating system tot Kubernetes. * **Meer dan alleen containers** Inzicht in het bredere portfolio (Linux & Cloud Native) en waarom dit aansluit bij de behoeften van moderne enterprises. Inclusief mogelijkheden om jezelf hierin te laten opleiden tot specialist. * **Praktijkvoorbeelden uit de markt** Hoe organisaties het volledige ecosysteem gebruiken voor stabiliteit, compliance en schaalbaarheid en waarom SUSE steeds vaker de nieuwe standaard wordt. * **Live demo** Zie het portfolio in actie en ontdek hoe SUSE de volledige keten verbindt: van infrastructuur tot en met de applicatielaag. Of je nu infrastructure architect, platform engineer of security specialist bent: sluit aan en ontdek waarom het SUSE-portfolio perfect aansluit op jouw moderne infrastructuurstack!'' *Het programma zal deze avond als volgt zijn:* * Vanaf 17.15 u: inloop * Rond 17.30/18.00 u: eten * 18.30 u: start sessie * 20.00 u: afsluiting We zien jullie graag dan!

I'm excited to host the 25st edition of *Strangers to Friends*! Every event so far has been warm, fun and full of great connections. So we’re doing it again! Curious about our previous events? Check out our photo albums (only visible on the laptop version of Meetup). **What to expect** * A safe, relaxed environment to meet both locals and expats, whether you want to meet new people, experience an international atmosphere or talk about business, it’s all possible. * Start the evening with a few rounds of conversation cards: pair up with someone you don’t know, answer meaningful questions and rotate every 10 minutes. Within just one hour, you’ll get to know several people really well and enjoy meaningful conversations. * Everyone comes on their own, so it’s easy to connect. **Practical details** * Doors open at 20:00, after 30 minutes we start with conversation cards * Venue: Boekencafé Libertas, Klarendalseweg 477-1, Arnhem * 20 min walk from Arnhem Central * 7 min walk from Arnhem Velperpoort * You’ll receive 1 drink token for (beer/wine/soft drinks) and snacks all night! * Find us on the right side of the café at the bar, by the window and garden Bring a smile and join us for an evening where friendships grow, business ideas spark and real-life connections happen. Back to basics, away from screens, meeting face-to-face. Warm regards, Julia

Iedereen is welkom op onze open Freedom Friday Bitcoin Turnhout Meetup @ het super gezellige café Sint Pieter - Grote Markt 60, 2300 Turnhout Geen presentaties. Geen workshops. Gewoon 1 onderwerp: bitcoin. **Connect with Like-Minded Minds** Engage with the Bitcoin community and mingle with fellow enthusiasts. This meetup is your chance to discuss the future, share ideas, and network with pioneers in the decentralized money world. 🏢 **Central Location**: café Sint Pieter ligt perfect centraal, een ruim cafe op de grote markt van Turnhout. Mark your calendars and spread the word!

The Dutch Heuvelrug is a hilly and sandy ridge, running from Hilversum in the north to Rhenen in the south. This National Park is covered in forest, heather and stretches of sand and dunes. On this hike, we will explore the Heuvelrug from Den Dolder. This area is mostly forested, perfect for a (hot) summer’s day! **Where to meet**: we will meet at **10 am** at train station Den Dolder. We will return to the same train station around 3pm. **This hike is fully booked.** [You may register on my website for a place on the waitlist.](https://rewildyourself.nu/dutch-nature-hikes/)

Hello all! Plan is to do this beautiful loop around Arnhem. Please check the route at the following link : https://www.komoot.com/smarttour/28541447?tour_origin=smart_tour_search Distance : \~80 km Climbs : Some climbing involved (I've never done this one). Pace : Chill endurance pace - 20-23 Km / h Start point : Arnhem centraal. Social ride! Let's try to be there for everyone and help each other out :) Please ignore the attendee limit. If you have a friend, bring them along Please bring your own food, repair equipment etc. Maybe if we have time we can find a place to have a bite to eat after the ride.

**Practical Curiosity: Learning from Everyday Data** How do we actually get better at utilizing our day-to-day data? Fancy dashboards and complex models might look nice and draw attention, but that’s not where most of us spend our time. In fact those shiny outputs frequently sit unused, while the real insights are drawn from the analyst’s daily practice. Sometimes it’s as simple and as powerful as noticing that a segment is shrinking, a channel is underused, or certain links keep getting all the clicks. There’s many different places that the spark of insight can come from, but you have to keep your head in the data and know where to look. In this session, we’ll explore real-world examples of how segmentation, testing, and click behavior can uncover practical digital marketing opportunities. You’ll leave with inspiration for your own use cases, along with a few simple ways to ask better questions, spot meaningful patterns, and make smarter decisions without overcomplicating it. **About Our Speaker:** [Elaine Armbruster](https://www.linkedin.com/in/elainearmbruster/) is a Director of Digital Experience at the [American Diabetes Association](https://diabetes.org/), where she focuses on using data and insights to create smarter, more effective digital experiences. A lifelong Columbus resident, she has built her career in email marketing and the broader digital user journey, and is finding she most enjoys working in the messy middle where systems, data, and big ideas don’t quite line up yet. Thanks to our 2026 sponsors: [Clarivoy](https://www.clarivoy.com), [What Box Consulting Group](https://www.whatboxconsultinggroup.com), [Conductrics](https://www.conductrics.com), and [Piwik PRO](https://piwik.pro) More info at [cbusdaw.com](https://cbusdaw.com)

**✅ Salsa Wednesdays with Todd Smith!** **👉 Beginner Salsa Class** **$15 In Advance / $20 At the Door** 7:00 pm – 7:15 pm … Registration 7:15 pm – 8:15 pm … Beginner Class **👉 Intermediate Salsa Class** **= $15 In Advance / $20 At the Door** 8:15 pm – 8:30 pm Registration 8:30 pm – 9:30 pm Intermediate Class **👉 If You Take Both Salsa Classes** **= $25 In Advance / $35 At the Door** **👉 Buy Advance Tickets Now at:** https://columbussalsadancing.com/salsa-wednesdays-dance-class-tickets/ **👉 Questions? Text Todd @ (614) 774-8146**

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. 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.

**✅ Bachata Mondays with Todd Smith!** **👉 Beginner Bachata Class** **$15 In Advance / $20 At the Door** . 7:00 pm – 7:15 pm … Registration 7:15 pm – 8:15 pm … Beginner Class . **👉 Intermediate Bachata Class** **= $15 In Advance / $20 At the Door** . 8:15 pm – 8:30 pm Registration 8:30 pm – 9:30 pm Intermediate Class . **👉 If You Take Both Bachata Classes** **= $25 In Advance / $35 At the Door** . **👉 Buy Advance Tickets Now at:** . https://columbussalsadancing.com/bachata-mondays-dance-class-tickets/

We're planning a hands-on technical session focused on building AI solutions in ServiceNow - think skills, agents, and real-world use cases. If you’re curious about AI on the platform, RSVP now and stay tuned for more details. Let's build together!

You can sleep in on the Sesquicentennial (observed), we’re shifting to the following Friday. But join the local UX community for a chat and some biscuits to catch up. If you were in CA for Figma Config, tell us all the lines and you can tell me how I can animate an SVG without coding it by hand, and why I’d even want to. Thanks to the team at Nationwide of supporting the group.

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