Hyperledger Fabric

**First meetup of the Columbus AI Engineering group.** We’ll kick things off with a practical, beginner-friendly discussion on: **How LLMs like ChatGPT actually work — and how to build real applications with them.** We’ll cover: * what’s actually happening under the hood (at a high level) * why LLMs behave the way they do (hallucinations, prompt sensitivity, etc.) * how people are building real systems with them today * where things break in practice This will be a **short, informal talk (\~15–20 min)** followed by open discussion and Q&A. Whether you’re an engineer, builder, or just curious about how modern AI systems work, you’re welcome to join. No slides, no fluff — just real conversation about real systems. We’ll hang out afterward and get to know each other.

We meet to learn and practice American Sign Language and to grow our familiarity with Deaf culture. Facilitated by hearing folks (with a connection to a professional interpreter) using Deaf-created content. People of all ASL skill levels are welcome! As we learn, we hope to connect more with the Deaf community in Central Ohio. Join us as you're able! Come regularly or just once - whatever you're looking for! Each meetup will explore different topics related to ASL/Deaf culture, and will feature time to practice conversation with one another. Just bring yourself and a willingness to learn!

## **Columbus Bitcoin Meetup – Event** Join us for another great evening dedicated to Bitcoin, learning, and community. We will be gathering in the private room at Olentangy Brewery for an evening of conversation, education, and fellowship with fellow Bitcoiners. This special event will feature three guest speakers sharing insights from across the Bitcoin ecosystem. ### **Guest Speakers** **Lindsay Faust** Relationship Manager at River **Andrew Tilmann** CEO of the Midwest Bitcoin Summit **Carlos Estrada** Founder of Coin Vigilante In addition to speaking during the event, Andrew Tilmann will also be available for a meet and greet. This will be a great opportunity to ask questions about the upcoming Midwest Bitcoin Summit, taking place September 23 and 24 at the Columbus Convention Center. ### **Midwest Bitcoin Summit Discount** Early Bird pricing ends **April 1st**, but you can still save **21%** by using the promo code: **COLUMBUS** Use the link below to apply the discount: [https://tickets.midwestbtc.com/affiliate/columbusbitcoinmeetup/event/midwest-bitcoin-summit-2026/?promoCodeTask=apply&promoCodeInput=columbus](https://tickets.midwestbtc.com/affiliate/columbusbitcoinmeetup/event/midwest-bitcoin-summit-2026/?promoCodeTask=apply&promoCodeInput=columbus) ### **Event Details** This will be a three hour event, with speakers beginning just before 7:00 PM. There will be plenty of time afterward for networking, meeting new friends, and continuing the conversation. Food will be provided. We look forward to seeing you there! ***

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

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 **Abstract** Web Forms gave .NET developers a powerful abstraction for building reusable UI controls long before design systems were a thing. Web Components finally bring that same idea to the browser natively. This session explores how the Web Forms mindset translates into Custom Elements, Shadow DOM, and HTML templates. We’ll examine how Web Components enable design systems that work across frameworks, how they differ from server‑driven controls, and why they’re becoming a foundational layer for modern UI. Whether you’re maintaining legacy apps or building greenfield projects, you’ll leave with a practical understanding of how to apply familiar patterns in a modern, standards‑based way. **YouTube Link** TBA

Join WTA for a magical trip to the Netherlands during the most beautiful time of the year—Tulip Season! Discover Amsterdam’s artistic heritage, charming canals, and world-class museums like the Van Gogh Museum. Stroll through vibrant tulip fields at the famous Keukenhof Gardens, a true feast for the eyes. Venture to The Hague and Delft to explore historic churches, canal-laced streets, and iconic blue-and-white pottery. Savor authentic Dutch cuisine, sample local cheese, and experience the country’s timeless charm at every stop. **To view the full ITINERARY & REGISTER visit:** **[WTA AMSTERDAM 2026](https://womentravelabroad.com/trip/amsterdam/)** **ITINERARY** **Day 1 – April 7** – Arrive at Amsterdam Airport Schiphol (AMS). Private transportation will take you to your accommodations for the week. After settling into your hotel, your group will get to know each other over a local welcome dinner. **Note:** We recommend your flight from the US arrives before 11 am on April 7 to allow adequate time to join the day’s activities. If you wish to arrive one day early, on April 6, charges for the additional night’s stay can be added to your invoice. **Day 2 – April 8** – Today, you will take a memorable tour of the Anne Frank House. Discover Amsterdam’s WWII history and follow in the footsteps of Anne Frank as she went into hiding in the Secret Annex. Jewish Anne Frank hid in 1942 from the Nazis during the occupation of the Netherlands; two years later, she was discovered and died in 1945 at the Bergen-Belsen concentration camp. Afterward, continue your cultural journey with a visit to the renowned Van Gogh Museum. Home to the world’s largest collection of works by Vincent van Gogh, the museum offers a profound look into the artist’s life, featuring iconic paintings, sketches, and personal letters that reveal the struggles and brilliance behind his art. **Day 3 – April 9** – FREE Day. Enjoy shopping throughout the city, or take a scenic bike ride through the countryside. Cycling in Amsterdam is the most authentic way to travel. There are around 515 km (320 miles) of dedicated cycle lanes in Amsterdam, making it the perfect setting to cycle the city or beyond. The countryside area is famous for its quaint villages, historic towns, farms, nature reserves, and lakes. You will have many opportunities to stop and take one-of-a-kind photos of the picturesque sights. **Day 4 – April 10** – Your group will spend today at the famous Keukenhof Garden, known as the Garden of Europe. This is one of the world’s largest flower gardens and is found to be the most beautiful in spring. Keukenhof Park covers an area of 32 hectares and has approximately 7 million flower bulbs planted annually. Make sure to have your camera ready to capture all of the vibrant colors and unique displays at the Keukenhof Garden! Transfer from Amsterdam to begin your adventure in The Hauge as the fun continues. **Day 5 – April 11** – Begin your day with a walking tour of the Hague! Today you will visit notable sites include Binnenhof Court of Parliament, the Royal Palace Noordeinde and its lush gardens, and many local monuments. Have a free afternoon to explore on your own before joining your group to indulge in a delectable group dinner. **Day 6 – April 12** – Day trip to Delft for a walking tour of this charming and historic Dutch town. Stroll along picturesque canals, cobbled streets, and tree-lined squares as you explore landmarks such as the Markt, the Nieuwe Kerk (New Church), and the Royal Delft pottery factory. Admire the town’s rich artistic heritage, famously tied to painter Johannes Vermeer, and soak in the tranquil atmosphere that defines Delft’s small-town charm. Enjoy a leisurely lunch at a local café before returning by train to your accommodation in The Hague. **Day 7 – April 13** – Depart The Hague via train for your return to Amsterdam. You will depart back to Amsterdam Airport Schiphol (AMS) for your connecting flight to the US. Your departure flight needs to leave after 12 pm to allow time to return to Amsterdam. \*Please note that this is a tentative itinerary and is subject to change. **WHAT’S INCLUDED:** ▪️ 7 days & 6 nights’ accommodations ▪️ Single occupancy, boutique hotel ▪️ Airport transfer ▪️ Local transportation ▪️ Keukenhof Garden Tour ▪️ Anne Frank House ▪️ Hauge City Tour ▪️ Amsterdam City Tour ▪️ FREE DAY to explore ▪️ Daily breakfast ▪️ Daily group lunch (excluding FREE DAY) ▪️ Daily group dinner **WHAT’S NOT INCLUDED:** ▪️ Roundtrip airfare from the US to Amsterdam Airport Schiphol (AMS) ▪️ Travel insurance ▪️ Items of a personal nature ▪️ Meals not listed above ▪️ Optional excursions and tours not listed above ▪️ Gratuities and tips for personal services

Central Ohio Radio Enthusiasts—CORE—is an informal community for anyone enthusiastic or curious about radio—whether you're new to radio and want to learn or you've been tinkering for years and want to share. Ham radio operators, GMRS users, Meshtastic fans, software-defined radio nerds, makers, and technical and non-technical folks are all welcome. No experience required or expected. This month we have **WiFi HaLow: Introduction and Practical Use** with **Alex Barbur**. Details are are [core.radio](https://core.radio).