Decentralized Systems & Applications

Welcome back to our meetup in April. The date is right before the GITEX AI Asia conference held at the Marina Bay Sands Convention Centre. * **06:00 PM** Registration, dinner, networking * **06:30 PM** Talk starts Talk #1: Powering AI Agents/Apps with contextual data from more than just the default vector search Description: Most solutions showcase vector search as the default search mechanism to power AI applications. But it is often not the most effective solution. In this demo, we will showcase different search techniques and hybrid approaches for retrieving contextual data with MongoDB. Talk #2: Real Practical RAG, from Demo to Production - in a 10,000-person organization and an intelligence org Moving from controlled demos to real-world deployment exposed several challenges that are easy to underestimate. In clean demos, our prompts/queries are often well-formed and datasets are neatly curated, and we test the happy paths. But real users behave very differently. We observed clear gaps between how users express intent and how that intent is represented in the embedding space (leads to irrelevant/missed retrievals). This made retrieval design and chunking strategy critical: how documents are split, indexed, and ranked directly impacted whether the system could “understand” a query. Additionally, as the dataset scaled with many similar or overlapping documents, retrieval became noisier - every vector is similar to a lot other vector - making it harder to consistently surface the right information. These challenges highlight that building a production-ready RAG system is not just about ensuring our datasets and RAG method works, but also user's intent and behavior. TBA: We will have a 2nd speaker talking about AI in real use cases in intelligence orgs either in this meetup or the next meetup. More details for the 2nd speaker are still being prepared.

Ready to learn a fun and exciting sport while getting some exercise? Our pickleball group classes offer a welcoming and supportive environment where you can learn and improve your skills while also making new friends. Our certified coaches will guide you through the basics of the game and help you to develop your technique and strategy. So, whether you are a seasoned athlete or just starting out, come join us for a thrilling and energizing game of pickleball! ### **Booking Information** * Please contact **98225900** to find out how to book this class. * The instructor will reach out to you once you've booked the class ### **Cancellation Policy** Credits will be considered used if class is cancelled within 24 hours before the start of the lesson

Hey Guys, For this run - we will be running along Sengkang Riverside Park towards Punggol and do a U-turn at 2.5KM mark. Meeting Point: Anchorvale CC Meet Up Time: 7:30PM Run Start Time: 7:45PM Running Route: Sengkang Riverside Park Approx. Distance: 5KM And in the spirit of the Run-to-Eat club, we will end off the run with a satisfying supper at Anchorvale Village Hawker Centre, though no obligation to join or buy food/drink, just chill will do. Hope to see you guys soon! ((: *Notes: 1) No locker services will be provided 2) Unable to wait for late comers 3) This is a shine event, in the event of rain, this event will be cancelled.

Join us for a casual walk along the newly launched Walking Trails @ CDC: Woodlands (Heritage Edition).This 4.4km route takes us from the futuristic Woodlands North MRT Station (Exit 1), through the scenic Woodlands Waterfront Promenade, and ends at the vibrant Marsiling Lane Market. For those who want to join in for dinner, we will ltake a bus to an aircon food court near Woodlands MRT Station (NS9/TE2). This walk is led by the organizer on a purely voluntary basis. There is no event fee—just come with a positive attitude and comfortable walking shoes! 🎁 **Earn Up to $15 in RedeemSG Rewards,While Stocks Last** By participating in this "phygital" trail, you can earn RedeemSG vouchers (valid at FairPrice, Sheng Siong, etc.): • $5 Voucher: Complete all 5 digital checkpoints along the route. • $10 Voucher: Spot and "collect" all 6 digital Ollies (the CDC mascots) hidden on the map! ✅ **Requirements to Earn RedeemSG Rewards** To claim the vouchers, you must: 1. Be a Singapore Citizen or PR aged 15 and above. 2. Have a Singpass account. 3. Have a CrowdTaskSG account. ❓ **New to CrowdTask?** Please read up and create your account before the walk here: www.crowdtask.gov.sg/quest/walking-trails-cdc [ PS: CrowdTaskSG is an official Singapore government platform operated by the Government Technology Agency (GovTech) ] 🎒 **What to Bring** • A fully charged smartphone with data connection (for the digital trail). • Water bottle and umbrella/poncho. • Mosquito repellent. ⚠️ **Disclaimer** By joining this event, you acknowledge that you are participating voluntarily and are responsible for your own safety and well-being. The organizer is not a professional guide and shall not be held liable for any injury, loss, or damage incurred during the activity. Please ensure you are in good physical health before joining. In case of heavy rain, the event may be postponed or cancelled; please check the Meetup comments for updates 1 hour before the start time.

Welcome to my sailboat. **Please read this notice**. These are crew opportunities, not for passengers, non-swimmers, people afraid of the water or get seasick. Bring a change of clothes, a towel, a hat, non-marking footwear with heelstrap and sunblock. There is a toilet and drinking water on board. Participants like to contribute to expenses in appreciation of this opportunity. **Also**, please confirm your attendance by SMS or Whatsapp on Saturday for sailing on Sunday, to avoid no-shows and missed sailings. No-shows deprive others of a place, so be responsible and remove your reservation if you are not attending, and please do it in good time. Places unconfirmed by Saturday will not be reserved, and I can't wait for you if I'm not sure you're coming. Keep me informed and reply to my messages. Don't be late. Thank you. Derek 9807-5827.

**For ages 13 and above.** Systema is a Russian Martial Art founded by the late Colonel Mikhail Ryabko and Vladimir Vasiliev. Systema was designed to develop individuals in a combative style which upholds the intrinsic value of all human life. This is why it is non-destructive – even of one’s enemies. Through the use of simple exercises, breathing techniques and massage work, Systema helps you to build a strong mind and body. Here is what you can expect: **Warm ups** Class begins with warming up each of the systems of the body – from the breathing, muscular and nervous system, each component needs to be properly engaged. **Thematic studies** Fetching from a huge pool of drills and sometimes even crafting specialized ones, our instructors format a logical progression of the concept being shared. Depending on the ability of the class, the drills are modified to be at the optimal level for learning, with suitable modifications given to students based on their individual performance. **Application of concepts** After the thematic studies, some time is given for the students to apply the training – the intensity is decided upon by the students under the supervision of the instructor. At times, the instructor will request for the students to push themselves, while at other times they are there to taper in the sparring to a productive level. **Cool downs** The cooldowns are usually done in a way both the help the class recover from the higher intensity application section as well as to revisit the concepts again in a calmer manner. This helps to ensure everyone is reminded of the key points. Sometimes we do a little massage. **Training circles** At the end of every training session, we circle up to share a few words about the training. This tradition was handed to us from our founders and is an integral part of our training. ### **Address** Lor 23 Geylang, #03-05 37, Singapore 388371 ### **Schedule** Saturdays 10AM - 12PM ### **Booking Information** * Please contact **98225900** to find out how to book this class. * The instructor will reach out to you once you've booked the class.

Welcome beginners and intermediate to join us. Please pm me to confirm your slot, or feel free to reach out if you have any enquiries. thanks 😊 Add my xiaohongshu id: 27421369691 欢迎新手 / 中等水平球友加入我们！如果有什么问题可以私我， 谢谢～ 欢迎加我小红书ID: 27421369691

**For ages 13 and above.** ***Teens Basketball (Ages 13-18) – “Elite Development”*** For teens looking to take their game to the next level, we focus on advanced skills, footwork, game strategy, and competitive play. This class includes structured training in shooting techniques, ball-handling, defense, and game IQ, preparing players for school teams, competitive leagues, and beyond. ***Adult Basketball (Ages 18+) – “Game Ready”*** Whether you’re a beginner or an experienced player, our adult sessions provide skill development, fitness training, and competitive play. These sessions focus on shooting accuracy, defensive strategies, and game execution, ensuring players stay sharp and active. ### **Address** 195B Punggol Rd, Singapore 822195 Punggol Rd, Singapore 822195 ### **Schedule** Sundays 11AM - 12PM ### **Booking Information** * Please contact **98225900** to find out how to book this class. * The instructor will reach out to you once you've booked the class.

Our classes are led by certified instructors who will teach you the proper techniques and strategies to help you dominate on the court. You will have a great time getting some exercise, meeting new people, and improving your pickleball game in a way that is efficient and impactful. ### **Booking Information** * Please contact **98225900** to find out how to book this class. * The instructor will reach out to you once you've booked the class ### **Cancellation Policy** Credits will be considered used if class is cancelled within 24 hours before the start of the lesson

Our classes are led by certified instructors who will teach you the proper techniques and strategies to help you dominate on the court. You will have a great time getting some exercise, meeting new people, and improving your pickleball game in a way that is efficient and impactful. ### **Booking Information** * Please contact **98225900** to find out how to book this class. * The instructor will reach out to you once you've booked the class ### **Cancellation Policy** Credits will be considered used if class is cancelled within 24 hours before the start of the lesson

## **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! ***

**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 You will need to scan your ID at the door to get a visitor badge. **Abstract** GitHub Copilot is powerful, but what if you could scale from a solo AI assistant to an entire team of specialized agents working in parallel? This session introduces Squad: an open-source framework for multi-agent orchestration that lets you define teams of AI agents with specific roles, responsibilities, and expertise. We'll progress from Copilot basics to the Copilot CLI, explore how Agents add autonomy, and see how Instructions and Skills let you customize agent behavior. Then, the climax: a live demo where a Squad team of 3 agents (Lead, Developer, Tester) stands up and builds a working application in real-time, showcasing true multi-agent collaboration. Whether you're new to AI or exploring how to scale your use of Copilot, this session will show you what's possible when agents work as a team. **YouTube Link** TBD

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).

In this local meeting, you will discover knowledge that you can use to get over the past. The key to improving your personal motivation, self-confidence, and happiness is to get over your painful memories. When you become free of your past, you will be free from stress, anger, anxiety and depression. Studies show that negative emotions can affect your health. By being free of negative emotions, believe it or not, you will most likely even look younger, feel more energetic, and become healthier! Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is brought to you by the Dianetics and Scientology life improvement center.

AI is changing how art is made. But when does it stop being your work and start being the machine’s? This month we're going to be doing a panel with with digital image, music, and written word artists, talking about at what point, while using AI in the creation process, does the work become not the artist creation? We encourage audience participation during this event that will be moderated by Chris Slee. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.transformlabs.com/services)

Pay attention! We’re delaying a week for those of you who may be on Spring break and/or celebrating the holiday. Ok, no pancakes, but waffles-a-plenty. Join the local UX and Digital Design community for a casual monthly breakfast. Look for us upstairs!