Quantitative Finance

Hi✋ At[ Data Tribes ](https://www.datatribes.nl/)we organise Meetups because we truly care about sharing knowledge both inside and outside the organisation. We believe that it is beneficial to us and to the market as a whole to connect, create, learn and grow together! **The agenda** // Doors open 6.00pm // Drinks and Pizza’s 6.30pm // Start presentations 7.00pm // Guest Speaker Advait Avinash Sowale // Quantifying the Impact of Data Quality on AI-Driven Decision Accuracy // Start networking 9.00pm // End Meetup 9.30pm Greetings, Data Tribes Inc.

**ArnhemJUG** We are excited to announce that we are welcomed by Entrnce for the April meetup. **Agenda** * 17:00 CET walk-in * 17:30 – 18:30 Food and drinks * 18:30 – 19:30 talk: **Better Assertions with AssertJ** by **Tim te Beek** * 19:30 – 19:45 break * 19:45 – 20:45 talk: **Reproducible Builds with Apache Maven** by **Hervé Boutemy** * 20:45 – 21:30 drinks **Better Assertions with AssertJ** Not all testing libraries are equal. Sure they all run your tests, but what happens when they fail? “Expected ‘true’, was ‘false’” won’t help you much. Your choice of library determines whether you can immediately jump to a fix, or first have to debug for more details. And with JUnit 6 and AssertJ 4 around the corner, it's high time for an upgrade! In this talk we'll explore AssertJ, and the fluent assertions API it provides. We'll contrast this to alternatives like JUnit and Hamcrest, and show how subtle differences improve the experience. Now you can finally have unified fluent assertions for all your tests, with a clear path to get there. For existing AssertJ users we will optimize its use to get more expressive assertions and meaningful messages from existing tests. Finally, a quick few OpenRewrite recipes help you apply all these best practices at once, and continuously going forward. **About** **Tim te Beek** Tim te Beek is a staff software engineer at Moderne, which automates software refactoring at scale. He has extensive experience contributing to and presenting on Open Source software within the Java ecosystem. Previously he worked as a consultant specializing in migration engineering and developer productivity. **Reproducible Builds with Apache Maven** Reproducible Builds is listed as a requirement for SLSA security Level 4, to achieve the highest level of confidence and trust in software. Such a level seems far away from achievable practice for normal humans. In reality, most Linux distributions implemented it over the last 10 years. And in the past 6 years, this practice is being extended to Java Open Source projects with great success: more than 6,200 releases from 800 Open Source projects published to Maven Central are publicly proven reproducible (and counting). In this session, we'll demystify Reproducible Builds for Java based on the experience gained while rebuilding these Open Source projects. We'll dig into the tools to improve your Maven builds and check the effective results: the journey is full of great learnings that go far beyond advanced security. **About Hervé Boutemy** Hervé started with Java when it was in beta, built his first Java projects with Make (yes) then Ant: but life changed with Maven 1... Life changed even more when growing from OSS user during working day to becoming an active OSS contributor to Maven 2 during nights and week-ends. Today, Hervé works as Solutions Architect for Sonatype on next steps of the build journey, promoting best-practices around Software Supply Chains. On the OSS front, Hervé is an Apache Software Foundation member and Apache Maven PMC Chair. He's also involved in many advanced projects like CycloneDX, SPDX, sigstore, and Reproducible Builds.

**No skills. No plan. Just colour and flow.** **This is not a painting class.** This is a gentle space to relax, play, and express through color. *Come alone or with your friends.* **No painting or drawing experience required.** We start with *playful warm-up exercises* to get you out of your head and into the moment. Then, we will introduce a few *creative techniques*, for you to try out, experiment & play! In the second half, you’ll shift between: * a *slower, mindful creation round* * a faster, intuitive expression round — supported by simple improv-style prompts to help you let go, react faster, and stay present! **No rules. No perfection. Just flow.** ✨ Note: This is a pay what you feel event ***

**Locatie:** Huis van Actief Burgerschap, Neude 11, 3512 AE Utrecht **Datum:** 30 april 2026 **Tijd:** 19:15 inloop, start 19:30 en eindigt om 21:30 We zijn allemaal op zoek naar liefde. Zoeken de perfecte partner of zijn erachter gekomen dat onze partner niet perfect is. Wat doe je dan? Ben je te kieskeurig? **Wanneer is liefde goed genoeg?** Tijdens deze bloeiklas bieden we ideeën en oefeningen aan over hoe jij liefdesrelaties kunt laten bloeien. Met creatieve oefeningen en in gesprek. Want je bent echt niet de enige met deze vragen. Samen gaan we zo op weg naar goede relaties. We zijn allemaal op zoek naar liefde. Zoeken de perfecte partner of zijn erachter gekomen dat onze partner niet perfect is. Wat doe je dan? Ben je te kieskeurig? Wanneeris liefde goed genoeg? Met filosoof Alain de Botton verkennen we hoe we tot onze huidige liefdesidealen zijn gekomen en hoe die een gezonde relaties weleens in de weg kunnen staan. Om vervolgens met psycholoog John Gottman uit te zoeken welke ingrediënten een relatie nu succesvol maken. We nemen onze rol in relaties onder de loep. En die van de ander. **Wat kan je verwachten?** Een avond in een ontspannen sfeer voor alle leeftijden. Geniet van een drankje van ons en ontmoet nieuwe mensen. Je kunt alleen komen of samen met een vriend(in). Liever een buddy? Geef het aan bij je aanmelding. Tijdens de avond maak je makkelijk contact met anderen die ook op zoek zijn naar betekenis. Meld je aan en kom bloeien! **Aanmelden kan via de onderstaande link:** https://www.dekwekerij.org/bloeiklas/utrecht-liefde/

¡Compartamos juntos con el grupo de personas más divertido de la ciudad!... ¡en español! No necesitas ser un hablante fluido o nativo.... ¡Solo atrévete a compartir! Te esperamos a las 20hrs.... ¡Entrada gratuita! ¡Nos vemos! ¡Hasta entonces! 😃 Let's share together with the funniest group of people in town!... in Spanish! You don't need to be a fluent or native speaker.... Just dare to share! We wait for you at 20hrs ....Free entry! Nos vemos! Tot dan! 😃 Facebook Group: https://www.facebook.com/groups/habladores/ Meetup Link: https://www.meetup.com/nl-NL/los-habladores/ Instagram page: https://www.instagram.com/los_habladores_utrecht/ Los Habladores!

We normally design interventions to improve our organizations. What if we flip the script, try to break it, and see how hard that is from the other side? This workshop makes these dynamics visible through game mechanics and shifts perspective by asking a provocative question: "*If you wanted to deliberately ruin this company in the next few years and nobody should explicitly know that this was your plan, what would you do?*" As the "*evil management team*", you get to try to ruin a fictional company and experience the pushback and resistance from the organization, because it wants to stay alive. The game is designed using systems thinking (with a focus on long-term effects) and the 3rd Entity concept from ORSC. In small groups, players receive a short fictional company profile and play through several rounds of "*destructive executive decisions*": strategy shifts, structural changes, policy tweaks, talent moves. During the game, players get to act from the company's perspective as well. This way, we explore how the system adapts, compensates, or even uses the damage to strengthen itself, drawing on ideas from complex systems and organizational inertia. A playful, creative simulation-based workshop with a fresh perspective on the complexity of change in large structures. You will gain a sharper sense of the system's resilience and the different forces involved in change by performing for all the sides involved in or affected by the change. **Come and join the fun. Register now!** **Program** 17:00 Walk-in 18:00 Diner 18:45 Session Starts 21:00 Drinks and aftertalk

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 Factor-ij Amsterdam on Thursday mornings. Be it a book, blog, script, essay, dissertation, resume, 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: 11: 15 AM - Quick introductions 11: 30 AM - Timer starts: write for 1 hour 12: 30 PM - The End: chat, take off, or keep writing OPTIONAL SOCIALIZING happens at 12:30 pm after the writing is wrapped. Writing is very solitary. Connecting (and sometimes even commiserating) with other writers is a cool thing. BEING LATE IS OKAY: just show up and get settled, then check-in with me after the session. (I’ll be the person with the Shut Up & Write! sign.) If you were on time, please be willing to make room for the friendly latecomer. Happy writing and I look forward to seeing you at Factor-ij! 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. Please come with your devices pre-charged, since we probably won't be always sitting somewhere with charging possibilities. Other Important Details: Travel by public transportation: 1. Take Tram 26 from the central station Amsterdam, and step out by the last stop. 2. Take bus 66 from the Amsterdam Bijlmer station, step out by Pieter Oosterhuisstraat, and further walk in the direction of the bus till the corner. FREE Wifi. Compulsory consumption is not required, but please do order a drink to honor our generous host.

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!

'CONVENIENCE STORE WOMAN' by Sayaka Murata 'Keiko Furukura had always been considered a strange child, and her parents always worried how she would get on in the real world, so when she takes on a job in a convenience store while at university, they are delighted for her. For her part, in the convenience store she finds a predictable world mandated by the store manual, which dictates how the workers should act and what they should say, and she copies her coworkers' style of dress and speech patterns so that she can play the part of a normal person. However, eighteen years later, at age 36, she is still in the same job, has never had a boyfriend, and has only few friends. She feels comfortable in her life, but is aware that she is not living up to society's expectations and causing her family to worry about her. When a similarly alienated but cynical and bitter young man comes to work in the store, he will upset Keiko's contented stasis--but will it be for the better? Sayaka Murata brilliantly captures the atmosphere of the familiar convenience store that is so much part of life in Japan. With some laugh-out-loud moments prompted by the disconnect between Keiko's thoughts and those of the people around her, she provides a sharp look at Japanese society and the pressure to conform, as well as penetrating insights into the female mind. Convenience Store Woman is a fresh, charming portrait of an unforgettable heroine that recalls Banana Yoshimoto, Han Kang, and Amélie.' ***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

## 🎨**Activity for EXPATS & English Speakers** ☕ Are you an art enthusiast living in or around **Amersfoort, Hilversum, Utrecht, Nieuwegein, IJsseltein, De Bilt and the rest of cities of the Utrecht's province** who love painting or drawing? Maybe you've felt the joy of creating but struggled to find others who share your passion and speak **ENGLISH**? **You're not alone! 😉** ✨✨✨✨✨✨✨ ## 🖌️**About this event** You will meet other Art Lovers like you to Draw, Paint and have some drinks Together ! Our events are not just about sketching or creating art—they’re about building connections. Every two weeks, we meet at a café to have a relaxing time drawing a painting. Please keep on mind that **ENGLISH i**s the official language we will use to integrate everyone in our conversations. ⭕⭕⭕➡️ **IMPORTANT ⬅️** ⭕⭕⭕⭕ ### 👩🏻‍🎨**Book formally your Seat 🪑via [WHATSAPP](https://bit.ly/3BXXE0f)** **If you want to confirm officially your attendance and separate your seat🪑. Book your seat in meet-up, and contact us via [WHATSAPP HERE](https://bit.ly/3BXXE0f) to receive more information on the address of our activities.** **Thanks a lot for your understanding!** 💐🥰 ✨✨✨✨✨✨✨ ### 👩🏻‍🎨**How Does It Work?** This event is simple, this initiative takes 2 Hours. Most of the participants use pencils, water pencils or watercolours. Main aim is to socialize while we draw. There will be plenty of time to talk and get to know each other. We have to mention that this event is suitable for all levels. Many have started to draw in our event actually. Also it is very important that you **[JOIN US AT OUR WHATSAPP COMMUNITY](https://bit.ly/3BXXE0f),** to stay up to date on our upcoming events and participate in our Drawing and Painting Contests! **👉: [https://bit.ly/3BXXE0f](https://bit.ly/3BXXE0f)** 🍀 ✨✨✨✨✨✨✨ ### ☕**Where?** We will meet in different cafes mainly in the *center of Amersfoort ( and some occasions in other cities around)*. I will inform you of the exact place some days in advance this event. The place will depend on the number of attendees. ✨✨✨✨✨✨✨ ### **🎟️ What is included?** 🟢 **2 HOURS TO HAVE FUN!** 🟢 **15 mins warming-up creative activity and paper material**🖌️🎨 🟢 New friendships and **conversations in ENGLISH** in a relaxed atmosphere 🟢 **Souvenir picture** with you and the rest of Art Lovers 📷 🟢 Exclusive **access to our Art Lovers Community** on which you will receive: ***\~\~\~ Drawing challenges,*** ***\~\~\~ Training content,*** ***\~\~\~ FREE Entries only to members*** ***\~\~\~ Drawing Competitions*** 🟢 Time to **create alongside fellow artists and amateurs** 🟢 The freedom to **work at your own pace** 💃🕺🎈 ✨✨✨✨✨✨✨ ### 🖼️**Art Materials?** Bring your own practical art materials to be adaptable to sketch on a coffee table. Like your sketchbook, pencils, watercolor, markets, pencils, your Tablet..etc ✨✨✨✨✨✨✨ ## **See you to Paint, Draw, and drink together!🌟☕🍷🍪🍰**

**\*\*The Perfect excuse to Draw and Paint in the Dark, and have Fun!\*\*💕**👨‍🎨👩‍🎨💕 ⭐ No experience needed 💬 English speaking activity 🕑 2 Hours of painting, creativity & fun in the dark 🧑🏻‍🎨 Workshop is guided by a professional artist 🎨 Extra Creative warming-up activity 🥳 All materials included 🏢 Amersfoort / Langestraat / City center 🎟️ **Book your seat formally HERE in [THIS LINK](https://buymeacoffee.com/artloversclub/e/430509)**! 📽️🔮🌙🌟 Check on YouTube, a video of what painting with us in the dark looks like: [https://www.youtube.com/shorts/D_Wo1esvls4](https://www.youtube.com/shorts/D_Wo1esvls4) 🌟If you want, you and your friends can bring freely any accessory, custom, or object that glows in the dark to have fun. 👓🎩⛑️👒🧤👕👙👔👗. This is a personal choice and not for everyone. Just for those who want to do it. 🎈 **Is it your birthday🎂 or a special occasion👰🏻💍🎒🧑🏻‍🎓, and do you want to bring some friends?** We can do something special for you ( contact us in advance to arrange). **🎨**💃🏻🎉**🖼️ ENJOY 2 HOURS OF CREATIVITY AND FUN IN THE DARK!** 🕑**CALENDAR 2026:** First Sunday of every month from 4PM - 6PM Jan 4 Feb 1 March 1 Apr 5 May 3 Jun 7 July 5 Aug 2 Sept 6 Oct 4 Nov 1 Dec 6 Jan 3 2027 🚫**NO EXPERIENCE NEEDED.** Our Artists and hosts will guide you through a step-by-step tutorial. You can use our suggested image or bring your picture of reference 🎨🖌️🖼️**ALL MATERIALS ARE INCLUDED** We'll provide you with everything you need to create your masterpiece. Create your very own masterpiece in only 2 hours using Glow in the Dark Painting! This session is not about perfection; it is about capturing emotions and personal expression. No experience required - our professional artist will guide you step-by-step. You can come with friends or alone - you are always very welcome! **🎟️🤔 QUESTIONS?** Contact one of our team members via WhatsApp in the following link: **[https://bit.ly/ArtLoversTickets](https://bit.ly/ArtLoversTickets "https://bit.ly/ArtLoversTickets")** **See you Soon.We are looking forward to painting and having Fun Together!** **🥳🎈**

Join us for a scenic and varied hike around Oosterbeek, one of the most versatile routes in the Netherlands 🌿 Expect a mix of forests, riverside paths, historical landmarks, and open landscapes along this beautiful circular walk. 🥾 What to expect: • A circular hiking route starting from Oosterbeek station • Approx. 13 km | moderate level (good fitness required) • Forest trails, boardwalks, and riverside paths • Highlights include streams, viewpoints, and scenic nature spots • Historical sites including WWII memorials and landmarks • Unique landscapes including floodplains and countryside charm 📍 Starting point: Oosterbeek Station (easy access by train and bus) 🕒 When: Saturday, May 2 Meeting time: 11:00 AM at Oosterbeek Station We’ll wait about 15–30 minutes before starting, so departure around 11:15–11:30 🚗 Getting there: Reach Oosterbeek easily by public transport • Train: Direct to Oosterbeek Station (meeting point) • Bus connections available nearby • Parking available around the station and in town 💬 Stay connected: Join our WhatsApp group for coordination, carpooling & updates: https://chat.whatsapp.com/Fv8Kqa3jMNK9nHKKAMV8SZ Follow our Instagram for photos & upcoming events: https://www.instagram.com/globeglide_?igsh=MWp3a2t6MmpocWFmZA%3D%3D&utm_source=qr 🌼 Let’s enjoy a day of walking, nature, and great company! ⚠️ Disclaimer: This is a casual, non-commercial meetup organized by hiking enthusiasts. By participating, you acknowledge that you are joining voluntarily and at your own risk. The organizers are not responsible for any personal injury, health issues, transportation, loss, or damage. Each participant is fully responsible for their own safety, insurance, and well-being. ⸻ This route offers a great mix of nature and history, with plenty of beautiful spots to rest or even picnic along the way. Expect around 3–3.5 hours of walking at a relaxed pace. Bring suitable footwear, water, and snacks. Looking forward to hiking together!

I'm excited to host the 21st 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

If you are interested in selecting investment choices for your 401(k) or other workplace savings plan, minimizing your income tax liability, or identifying the most effective investments for your brokerage account, we are the group for you. We are a local chapter of Bogleheads, whose investment strategy can be found here: https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy Or you can peruse the Boglehead forum here: https://www.bogleheads.org/index.php I look forward to seeing you there. Mark Vonder Haar

**Welcome to the Women’s Columbus Bogleheads® Sub-Group** This sub-group is for **women who want to learn and discuss finances in a safe, supportive space**. For those interested in moving towards financial independence and retirement by learning investment basics, choosing your 401(k) investments, minimizing taxes, and more. We’re a local chapter of **Bogleheads®**, following a long-term, practical investment philosophy: [Investment Philosophy](https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy): https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy [Bogleheads Forum](https://www.bogleheads.org/index.php): https://www.bogleheads.org/index.php No question is too small, and no experience is too simple. Share, ask, and learn — at your own pace, without judgment, in a group of like-minded women. Let’s build confidence and knowledge **together**!

**Unleash Your Inner Oracle: The Polymarket Edge** Prediction markets aren't just for finance geeks. This masterclass reveals the secrets to profiting from your insights on Polymarket, the leading platform for event-based predictions. **Is This You?** * Love probability and gut-feel decisions? * Always ahead of the curve on emerging news? * Curious about a hot new investment vehicle? * Ready to turn knowledge into pure, sweet gains? * A sophisticated trader looking to diversify? If yes, keep reading... **Agenda: From ZERO to HERO** * Deep dive into Polymarket: account setup, trading mechanics, and the ins and outs. * Decoding the Matrix: Event analysis frameworks to give yourself an advantage. * Fort Knox Your Capital: Master risk-management techniques that shield you. * Spotting the Signals: Reading market dynamics and grasping liquidity factors. * Crafting Your Fortress: Portfolio creation blueprints for consistent wealth. * The System is Key: Building a repeatable, winning prediction workflow. **Time is ticking…** Slots are super limited. Ready to level up? ### [🔥 SECURE YOUR SPOT NOW 🔥](https://remoteready.io/product/Polymarket?city=Columbus&groupurlname=circle-of-professionals-mastering-ai-income&startgmtdatetime=2026-05-01T22:00:00Z) --- **Cracking the Code of Polymarket.** Turn your analysis into profit.

Start your week the right way with Manic Mondays. Giving you an enjoyable Bachata lesson with a push of cool moves. The second hour has Beginner/Intermediate Salsa on 1. You must understand basic Salsa skills to participate. 730pm-830pm Bachata Cool Moves 830pm-930pm Salsa On 1 (Beginner/Intermediate) $15 for One Class $20 for Both Free Parking & Plenty of Dance Space.

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!.

**Optional movie afterwards**

Details Let's join together for a fiesta! (Invite friends - we have lots of room!) Taco Bar Margarita and Beer tasting Complementary chips and salsa Margs/cocktails at the bar for purchase Freshly prepared snacks in the deli for purchase Festive Band/Music Margaritas/Mexican Beer Tasting + Taco Bar: $15.00 per person (covers 4 Margarita or beer samples and one pass thru the Taco Bar) Where: #MarketDistrict (Grandview Yard) location. The party room (our private space) will be decorated with both patios open! Adjoining upstairs area also open for over flow and mingling. After Party: Sometimes, we head to a venue to hear live music afterwards. LDNL is at Black Swan in Hilliard tonight! Wear your bright colors and cheerful !Salud!