Mainframe Computing

**Community Tuesdays at Refraction** are a free weekly program designed for job seekers, professionals in transition, and aspiring founders to access resources, connections, and coworking space in the heart of Northern Virginia’s tech corridor. Each Tuesday from 9:00 am to 5:00 pm, participants gain complimentary access to Refraction’s collaborative workspace, career mentoring, resume and job-search support (including proven AI prompts to navigate applicant tracking systems), and a welcoming community of innovators and peers. Whether you are refining your next career move or exploring entrepreneurship, Community Tuesdays offer the space, guidance, and tools you need to move forward with confidence. For complete details and easy (non-Meetup) registration, please visit: [https://www.refraction.one/ctues](https://www.refraction.one/ctues).

The first band at Brookside Gardens summer twilight concert series is the Olney Big Band. The Band specializes in performance of classic swing, dance and jazz music from the Big Band Era of the ‘30s and ‘40s in addition to arrangements from the '50s to present day. Bring a chair.

http://photos2.meetupstatic.com/photos/event/6/3/f/8/event_160705592.jpeg (https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=ZA8SWMLWS7WHA) NOTES 1. The conversation course is continuing education, designed to excel students' Amharic conversation skill. 2. The course runs for 12 weeks. 3. We don't give placement test. The students place themselves and they can switch to a level up or down, after they examine themselves. 4. Class cancelled due to 'Force Majeure', will be recovered at the end of the course. 5. Arriving by Metro: The closest metro stations are Farragut West and Farragut North. 6. Meter parking is also an option. It is about $ 0.25 for 8 minutes. 7. The payment for each class is $ 15.00 per person per hour. It will be $ 20.00 per person per hour for walk-ins. However, it is depending on availability. 8. Students can bring friends and pay $ 20 for 2 persons per hour. But it has to be an advance payment.

Come join us for a 11-12 mile ride at a Fairland. We normally average 10mph+. Wheels rolling at 6pm unless someone texts me they're running a little late. We normally do 10-12 miles. This ride is more for faster than average riders due to the pace. We wait up at intersections to let all riders catch up. If you have a good amount of rides under your belt and can average 8mph or better on singletrack trails, and take small brakes, then you will probably will be able to hang but it will be a challenge. About Fairland: 90% non-technical ride with few major climbs and no mandatory obstacles (they all have ride-arounds). There are a couple good places to stop and practice log-overs, and balance on the boardwalks, and some good flow trails. We will visit the skills pit but be advised, there are drops, jumps, skinnies, and overall technical features that will require the appropriate experience. Always take caution and know your technical ability limits. Video of our ride at Fairland: [https://www.youtube.com/watch?v=S1-b0EDVb08](https://www.youtube.com/watch?v=S1-b0EDVb08) What to bring: Plenty of water, helmet (no helmet no ride), your mtb of course!, multi-tool (although you can borrow mine), patch kit, extra tube (make sure it has the same valve you need for your wheel), a snack if you're doing both loops.

[Book Your Ticket Here on our Website](https://crowndancestudio.com/group-classes/). This Class is for anyone who's taking some beginner classes and is considering leveling up. When?: Tuesday Level 2 Salsa Group Classes 7:00PM to 8:30PM. Do I need Partner? NO Is it a Series? No. But we review similar materials on the consistent basic. So having a good basic foundation in those dances will go a long way for you here. Cost: $25 Per Person for 90 minutes class Can I drop-in? Yes. Membership & Class pass available for your better growth and progress. www.crowndancestudio.com

Date: June 7 2026 Sunday 10:00 am - Noon EDT Full title: Machine Learning for Reliable Quantum Computing: An Algorithm–Hardware Co-Design Perspective Summary: Reliable quantum computing requires co-design across the full stack, including algorithm structure, compilation, and execution, rather than isolated optimization of any single layer. This talk presents a unified framework in which these layers are jointly optimized under realistic hardware constraints. Structure-aware compilation exploits algorithmic interaction graphs to reduce circuit depth; joint optimization across mapping, term ordering, and algorithm parameters yields significantly improved success probability; and execution-layer analysis reveals that error mitigation effectiveness depends critically on circuit symmetry and native gate choice. While demonstrated on superconducting quantum processors, the underlying co-design principles are potentially transferable across architectures. Building on this foundation, the talk highlights machine learning as the key enabler for closing the feedback loop: data-efficient, parameterized noise models learned directly from workload execution data achieve substantially improved predictive fidelity over vendor models without the overhead of dedicated characterization. These insights situate the co-design perspective within the emerging framework of quantum deep learning. In this broader setting, the talk also presents an operational definition, a unifying taxonomy, and a benchmarking protocol grounded in explicit resource contracts. Speaker: Dr. Yanjun Ji has an interdisciplinary research background in Physics and Computer Science. In 2020, she completed my Master's degree in Theoretical Physics at Saarland University. In 2024, she earned her Ph.D. in Computer Science at the University of Stuttgart. She is currently a postdoctoral researcher at Forschungszentrum Jülich. She is committed to interdisciplinary research at the cutting-edge convergence of quantum computing and artificial intelligence. Her research encompasses both foundational theoretical investigations and the development of practical applications, aiming to serve society and benefit humanity. Moderators: Dr. Pawel Gora, CEO of Quantum AI Foundation [Quantum AI Foundation](https://www.qaif.org/ "https://www.qaif.org/") Dr. Sebastian Zajac, member of QPoland [QPoland - QWorld](https://qworld.net/qpoland/ "https://qworld.net/qpoland/")

[Book Your Classes by Clicking This Link! ](https://crowndancestudio.com/group-classes/) Friday: Advanced Expression End the work week with high-energy **Advanced Rhythm** from **7:00 PM to 8:30 PM**. This session dives deep into the technicalities of Latin and Ballroom styles like Rumba, Samba, or Mambo, designed for dancers who value precision and artistic expression. For $25, you'll receive intensive instruction that pushes your physical boundaries and refines your competitive or performance edge in a high-vibe atmosphere. **When: Every Friday** **Time: 7:00 pm to 8:30 pm.** **1 Dances per month:** **\*Please check the flyer on the group class page for the dance of the month. Or contact us to find out.** **Cost:$25 per person for 90 min.**

DC Code and Coffee is an inclusive, informal co-working session. It's community-led and community-run by devs, for devs. People of all skill levels attend. Whether you’re dev-curious, aspiring, or a professional developer, we’d love to have you! Come chat or learn to code on a Sunday afternoon with coffee and cool-inclusive people. Bring your laptop! We typically meet every month on the weekend. **Join our online community!** For all things Tech in DC and to get latest updates and tech events from the DMV area, join the [DCTech Slack](https://dctech.chat/). All DC Code & Coffee announcements are in the #dccodecoffee channel **How it works** Near the beginning of the event, we do an introduction circle. You say your name, what you can help others with, and what you would like help with. You can also share job opportunities. After the introduction circle, everything is self-organized.

Join us for MORE Women's MTB Ride at the Cabin John Trails in Potomac, MD. Beginner-level riders are welcome and encouraged to join in the fun! A mountain bike in good condition and helmet are required. **Sign up at Golden Volunteer here:** [https://x.gldn.io/e/jgkrtQUn21b](https://x.gldn.io/e/jgkrtQUn21b) ***Please do not sign up on Meetup! If you do, you won't be alerted if the ride is cancelled!*** **Meet** at 6:00 PM with wheels down at 6:10 PM. We will not ride if the trails are wet or muddy. Check your email from Golden Volunteer in case the ride is cancelled due to weather/trail conditions. **Description** \- The event is open for women age 18\+\. You must sign a waiver on the Golden Volunteer link\, wear a helmet\, and be able to comfortably ride your mountain bike\. We expect to ride about 4\-5 miles on single track natural surface trails\. Bring your mountain bike\, helmet\, and drinking water\. This ride is **not suitable for hybrid bikes**! As space is limited, please update your RSVP if you cannot attend. **And support your trails and join MORE! www.more-mtb.org** **Where** – Meet at the parking lot for the Cabin John Group Picnic Area at 7701 Tuckerman Lane, Potomac, MD. Follow Google Maps at: https://goo.gl/maps/aumXoQnD2qAp3iNp9

PyData London 2026 brings together data scientists, engineers, and researchers from around the world for three days of insightful talks, tutorials, and community connection. Hosted in one of Europe’s leading tech hubs, the event highlights the latest developments in Python, machine learning, and data science. Attendees can expect a mix of cutting-edge research, real-world applications, and opportunities to network with industry leaders. Whether you're a beginner or an expert, PyData London offers something for every level of the data science community. **THIS IS NOT A TICKET- TICKETS MUST BE PURCHASED ON CONFERENCE WEBSITE.** https://pydata.org/london2026

Looking for a new skill? Want to seem mysterious when people ask about your hobbies? Enjoy puzzles? Lock picking might be right for you! Is this legal? Yes! Is it fun? Yes! The meeting is very casual, come and go as you please. We meet in the upstairs area of Board Room. No payment, skills, tools, or RSVP necessary. If you can make small precise movements with your hands, you can learn to pick locks. Introductory talk at 7pm. All are welcome. We meet in a bar but minors are allowed to attend. We are not in a private room; parental discretion advised. If you are a minor or are responsible for one who's attending, please email the organizer in advance at chapter-DC@toool.us Open invite; bring friends! We are the DC chapter of TOOOL. More information here: http://toool.us/

[Book Your Classes by Clicking This Link! ](https://crowndancestudio.com/group-classes/) Mid-week is for the experts with **Level 3 Bachata (7:45 PM)** and **Level 3 Salsa (8:30 PM),** followed by a **Social Dance Party at 9:15 PM.** These advanced classes challenge experienced dancers with intricate footwork and styling, emphasizing the joy of high-level performance. **The evening costs $25 for the classes and social**, providing an inclusive space where advanced students can sharpen their craft and immediately practice their moves with peers. 7:45 Bachata (Level 3) 8:45 Salsa (Level 3) $18 for 1 Class $22 for 1 Class + Social $25 for 2 Classes + Social $10 for Social Only

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

We are bringing Microsoft Build sessions to Columbus Ohio! The Central Ohio Azure Meetup and Central Ohio .NET Developer's Group (CONDG) are coming together to bring some of the labs and breakouts from Microsoft Build to your backyard. In this free, 1 day event, you are going to Build stuff with us! And yes, there will be free food. So please RSVP for a head count!

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

Topic to be announced. **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

We have moved to guild.host. Look us up there. https://guild.host/events/buckeye-cocoaheads-rcavwd

Couldn't make Knowledge? Or want to debrief the dancing robots or Autonomous Workforce? Join us for a Knowledge '26 recap, insights sharing, a couple rounds of golf, and fun at Topgolf. As always, drinks and food will be provided. More details to come — mark your calendar, RSVP, and save your spot today!

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9