Hashing

Join us at Pubkey DC for the BitPlebs! DC BitPlebs are [Socratic Seminars](https://en.wikipedia.org/wiki/Socratic_method) that do not require advanced and technical understanding of Bitcoin. The topics we discuss include: \- Freedom tech \- Hashrate and mining economics \- Custody and self\-sovereignty \- On\-chain data \- Scaling solutions \(LN\, Ark\, Cashu\) \- Privacy ​The full agenda will be posted [here](https://bitcoindistrict.org/bitplebs). **IMPORTANT: No photos, videos, or audio recordings. The meeting will be held under the Chatham House rule, meaning it's ok to share information and stories from the session, but not to share who said what.** # **Agenda:** 6:00PM - 7:00PM - Meet & greet 7:00PM - 8:30PM - Discussion of recent bitcoin related news & developments 8:30PM - 10PM - Hangout

Attention Attendees!!! Due to the upcoming winter storm, we need to **cancel the CFBC Fairfax meetup scheduled for Monday, January 26** to ensure everyone’s safety. **Our next CFBC Fairfax meetup will take place on February 23**, and we look forward to seeing you then. Thank you for your understanding, and please stay safe and warm. If you have any questions, feel free to reach out. Fairfax County VA Real Estate Investors, Agents and Professionals! We just launched a Cash-Flow Breakfast Club for your area! This is the most unique real estate investor club, education, networking and mastermind event in the US! **Join us for our official launch event for Fairfax County VA** **on February 23.** **This is a 12 part education series with new topics every month. This event is session 11 of 12!** *(it is ok to attend even if you missed previous sessions. Each session has stand alone topics. You can also attend other near by locations to get caught up on sessions that you have missed.)* **This event is free but has very limited seating and we are limited to the first 50 to RSVP! Join us and become a founding member of this amazing community!** **Very limited seating. In-person only.** **Make sure to RSVP today to reserve your spot.** **When: February 23, 2026 @ 5:45PM – 9:00PM EST** **Where: 12700 Fair Lakes Circle, Ste. 120** **Fairfax, Virginia, 22033** The Cash-Flow Breakfast Club is NOT just a meet up. It’s the most unique Real Estate Investor Community of Mentors, Coaches & Masterminds. A community of growth oriented, abundance mindset, go-giver individuals with a BARE MINIMUM commitment to become financially free through real estate investing. We focus on providing education and building networks to help every member solve their cash-flow freedom equation, so they can have the time-freedom needed to follow their passions, make a lasting impact and even change the world! The unique format of this event, which consists of high-level education, gamified networking, mastermind breakout sessions, case studies, group deal analysis, market deep dives, and peer-to-peer coaching facilitation makes this the most impactful local real estate investor group a real estate investor can be a part of. The foundation of the group is built around the belief that everyone in the room has the potential to change the world… however most of us never have the time, energy or financial situation to even dare to dream big enough. Most of us have passions that will never be followed, amazing businesses or ideas that will never be pursued… unless we can solve the Cash-Flow Freedom Equation, which ultimately leads to Time-Freedom. Once that happens it is usually much easier for us to think bigger, dream bigger, be bigger. · Learn more about the Cash-Flow Breakfast Club [HERE](https://cashflowbreakfastclub.com/) · Get in the VIP List to be notified about the next event in your area [HERE](https://the.cashflowbreakfastclub.com/VIP) · Learn more about Launching your own Cash-Flow Breakfast Club Location [HERE](https://cashflowbreakfastclub.com/launch-your-own-club/) · Learn more about becoming an Affiliate-Sponsor at one of our club locations [HERE](https://cashflowbreakfastclub.com/affiliate-sponsors/) · View photos and videos of some of our recent events [HERE](https://cashflowbreakfastclub.com/about-the-cash-flow-breakfast-club/) · Looking to represent? Browse Cash-Flow Breakfast Club apparel and fly swag [HERE](https://cashflowbreakfastclub.com/shop/)

This CREATIVE HAPPY HOUR -and- EDUCATIONAL DISCUSSION is for creative people and folks who appreciate creativity. Whether you attend, produce, appreciate, or promote, you are welcome to join us on Monday, February 23, 2026 from 5pm-7pm for CREATIVE HAPPY HOUR -and- EDUCATIONAL DISCUSSION at Silver Branch Brewing Co in Silver Spring, MD. Register on Eventbrite at [https://HappyHour2-23-26.eventbrite.com](https://HappyHour2-23-26.eventbrite.com). Come meet, network, and enjoy. Only those ages 21 and up can attend. Happy Hour specials are from 5pm-6pm: $5.95 beer and select drinks. Entrance is free. This is a casual event. Join us as Paul Marengo, the Festival Director of ReelAbilities Film Festival: Greater Washington, will lead a 30-minute educational discussion on grant writing designed for filmmakers and arts organizers. In this session he will break down key elements of successful grant proposals, offer practical advice on identifying suitable funding opportunities, and share insights into how to communicate project goals and community impact effectively to potential funders. Register on Eventbrite at [https://HappyHour2-23-26.eventbrite.com](https://HappyHour2-23-26.eventbrite.com). Check out our DC Filmmakers T-shirts on Amazon at[ https://a.co/d/gXACa1Y](https://a.co/d/gXACa1Y) to help support the group. This event is produced by[ DC Filmmakers Group](https://www.facebook.com/groups/dcfilmmakers) in partnership with[ TIVA](https://www.tivadc.org/) (Television, Internet, and Video Association of DC),[ WIFV](https://www.wifv.org/) (Women in Film & Video),[ Wheaton Film Festival](https://www.wheatonfilmfestival.com/),[ Docs in Progress](https://www.docsinprogress.org/), DC Media Makers Group, etc. Sponsored by[ Brian Frankel Law Firm PLLC](https://brianfrankel.com/),[ Creative Colony Spaces](https://www.creativecolonyspaces.com/membership/overview), [ ](https://reelabilities.org/greaterwash/)[ReelAbilities Film Festival: Greater Washington](https://reelabilities.org/greaterwash), and Adobe Software. Enjoy delicious craft beers, tasty snacks, and great company in a relaxed atmosphere. Whether you're a beer enthusiast or just looking to unwind after a long day, this event is perfect for you. Don't miss out on the opportunity to kick back and relax with us at Silver Branch Brewing Co. Use the QR codes at the table to order food and drinks, and be prepared to mingle. Check out the[ Silver Branch Brewing Company's Menu](https://www.silverbranchbrewing.com/lagerhaus-biergarten/). PARKING: Paid parking available one block away at the county's Cameron Street Garage on 8530 Cameron Street (Better pricing than street or private parking.) See you there on 2/23/26! Register on Eventbrite at [https://HappyHour2-23-26.eventbrite.com](https://HappyHour2-23-26.eventbrite.com).

Friendly game. No slide tackling, rough play, or coaching. Bring a white and dark colored shirt. Ideally we will play 10 vs. 10 on half the field, but will split into multiple games if we have numbers.

“There’s no recipe for a lightning bolt, enlightenment is always an accident, but there are ways of making yourself more accident-prone” -- *[Richard Rose](https://tatfoundation.org/about-richard-rose/)* \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- ***“I am struck with how rare it is to find a few good friends on the path. It is easy to find people who simply want to sit and be entertained by teachers, or who want to sit and entertain by playing the role of teacher. In other words, the quest for affirmation often outweighs the quest for truth.*** ***Yet you may have one or two good friends, and definitely have one or two waiting to be discovered. Find them; be thankful.”*** ***— Shawn Nevins*** 'What will make me happy in life?' ... 'Am I my thoughts?' ... 'What is Enlightenment?' ... We meet every week to ask questions like these in the pursuit of Self-Knowledge and Truth. We are interested in topics like: Zen, stoicism, spirituality, psychology, mindfulness, Nisargadatta, non-violent communication, Socrates, existential philosophy, Alan Watts, taoism, Eckhart Tolle, meditation, Ramana Maharshi, etc. But we are not affiliated with any dogma, philosophy, or religion. Our goal each meeting is to serve as mirrors for one another using question-based inquiry in a safe environment. In a session, every participant takes turns discussing the week's question or topic, and the group asks reflective questions without any agenda besides trying to understand the person's beliefs. A few other guiding principles of our group: * No one is obligated to share * Be honest with yourself and others * Do not try to convince others to believe or think as you do * Keep the focus on the person being questioned We meet at the [Bethesda Library](https://maps.app.goo.gl/GWMozF8zpY1m1PY26) every Monday. The library is a 5 minute walk from the Bethesda Metro on the Red Line, approx 25 minute Metro ride from Metro Center and Gallery Place stations. The library has a a parking lot with metered parking for $1/hour. \*\*\* WE WILL BE IN MEETING ROOM 3 UNLESS OTHERWISE NOTED ----- THE MEETING ROOM IS IN THE BACK OF THE LIBRARY \*\*\* Please contact us with any questions!

This CREATIVE HAPPY HOUR -and- EDUCATIONAL DISCUSSION is for creative people and folks who appreciate creativity. Whether you attend, produce, appreciate, or promote, you are welcome to join us on Monday, February 23, 2026 from 5pm-7pm for CREATIVE HAPPY HOUR -and- EDUCATIONAL DISCUSSION at Silver Branch Brewing Co in Silver Spring, MD. Register on Eventbrite at [https://HappyHour2-23-26.eventbrite.com](https://HappyHour2-23-26.eventbrite.com). Come meet, network, and enjoy. Only those ages 21 and up can attend. Happy Hour specials are from 5pm-6pm: $5.95 beer and select drinks. Entrance is free. This is a casual event. Join us as Paul Marengo, the Festival Director of ReelAbilities Film Festival: Greater Washington, will lead a 30-minute educational discussion on grant writing designed for filmmakers and arts organizers. In this session he will break down key elements of successful grant proposals, offer practical advice on identifying suitable funding opportunities, and share insights into how to communicate project goals and community impact effectively to potential funders. Register on Eventbrite at [https://HappyHour2-23-26.eventbrite.com](https://HappyHour2-23-26.eventbrite.com). Check out our DC Filmmakers T-shirts on Amazon at[ https://a.co/d/gXACa1Y](https://a.co/d/gXACa1Y) to help support the group. This event is produced by[ DC Filmmakers Group](https://www.facebook.com/groups/dcfilmmakers) in partnership with[ TIVA](https://www.tivadc.org/) (Television, Internet, and Video Association of DC),[ WIFV](https://www.wifv.org/) (Women in Film & Video),[ Wheaton Film Festival](https://www.wheatonfilmfestival.com/),[ Docs in Progress](https://www.docsinprogress.org/), DC Media Makers Group, etc. Sponsored by[ Brian Frankel Law Firm PLLC](https://brianfrankel.com/),[ Creative Colony Spaces](https://www.creativecolonyspaces.com/membership/overview), [ ](https://reelabilities.org/greaterwash/)[ReelAbilities Film Festival: Greater Washington](https://reelabilities.org/greaterwash), and Adobe Software. Enjoy delicious craft beers, tasty snacks, and great company in a relaxed atmosphere. Whether you're a beer enthusiast or just looking to unwind after a long day, this event is perfect for you. Don't miss out on the opportunity to kick back and relax with us at Silver Branch Brewing Co. Use the QR codes at the table to order food and drinks, and be prepared to mingle. Check out the[ Silver Branch Brewing Company's Menu](https://www.silverbranchbrewing.com/lagerhaus-biergarten/). PARKING: Paid parking available one block away at the county's Cameron Street Garage on 8530 Cameron Street (Better pricing than street or private parking.) See you there on 2/23/26! Register on Eventbrite at [https://HappyHour2-23-26.eventbrite.com](https://HappyHour2-23-26.eventbrite.com).

Title : Design of a Quantum Photonic Full Adder Gate based on an 8-mode Integrated Optical Circuit Date: Feb 28 2026 Noon - 14:00 EST Abstract: Multiport interferometers designed using the Clements decomposition algorithm can be used to implement compact quantum-photonic full-adder (FA) gates on photonic integrated circuits (PICs). By expressing each element of the FA gate matrix in terms of the permanent of a non-unitary matrix, enabled through Boson sampling, the required number of MZIs in the gate can be further reduced. In this presentation, we will discuss the design of an FA gate modeled as a four-photon scattering process on an eight-mode integrated optical circuit, where the permanents of submatrices determine the output probabilities. Simulation results demonstrate a fidelity of 1 and a success probability of 2.22 × 10⁻⁴ for the FA gate. We will also examine the impact of phase-shifter and attenuator variations on fidelity and success probability using Ansys Q-Interconnect software. Finally, we will compare the performance of the proposed FA gate with a benchmark Toffoli gate designed using the same approach. Speaker: Shafiqul Hai received the B.Sc. degree in Electrical and Electronic Engineering from the Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh, in 2007, and the M.Eng. (Thesis) and Ph.D. degrees in Electrical Engineering from McGill University, Montreal, QC, Canada, in 2011 and 2016, respectively. He is currently an Assistant Professor in the Department of Electrical and Computer Engineering at Lakehead University. His research interests include the modeling and characterization of compact nanophotonic devices and components for next-generation optical fiber and RF communication systems, as well as quantum computing on photonic integrated circuits. He is the author or coauthor of more than 12 peer-reviewed journal papers and 15 conference publications. Moderators: Dr. Pawel Gora, CEO of Quantum AI Foundation ([https://www.qaif.org/](https://www.qaif.org/)) , Dr. Sebastian Zajac , member of QPoland ([https://qworld.net/qpoland/](https://qworld.net/qpoland/)) This is an online event. Zoom registration form will be emailed to registrant and posted on the event forum by Feb 28 2026 11:00 am EST.

Greetings from the capital! Every Saturday at 7:30 PM, people from all walks of life — students, diplomats, travelers, locals — gather to unwind and connect. [[[Click this whatsapp groupchat link to join](https://chat.whatsapp.com/Gf89PPYe3RMAK6Z7SGf5or)]] Our age range is mostly 20s to 30s. If you enjoy discussing culture, politics, travel, or just want to practice a new language, this group is for you. A perfect blend of diversity and dialogue, right in the heart of D.C.

Friends Join Us for a Transformative Two-Day Workshop on Authentic Relating on Feb 28th and March 1st. ART Level 1! Authentic Relating is about creating deeper, more meaningful connections by being open, honest, and present with others. In this workshop, you will learn practical tools to communicate more effectively, understand and express your true self, and cultivate empathy and trust in your relationships. **What to Expect:** * **Interactive Exercises:** Engage in a variety of activities designed to help you practice authentic relating principles. * **Group Discussions:** Share experiences and insights in a safe and supportive environment. * **Personal Growth:** Discover new ways to connect with yourself and others on a deeper level. Please RSVP to secure your spot, as space is limited. To learn more please click the link below. You can register online by going here: [https://authenticrelating.co/product/level-1-washington-dc-feb2026/](https://authenticrelating.co/product/level-1-washington-dc-feb2026/) *Enroll before January 28th and get 100 dollars off.*

Join us as The Washington Area Roadskaters lead you on a different adventure every week, skating through and around our Nation's Capital! For current details, check Facebook and Instagram. Facebook: https://www.facebook.com/groups/WashingtonAreaRoadskaters/events Instagram: https://www.instagram.com/weareskatedc/ We hope to see you soon!

The rise of practical AI tools is exciting. Right now, tools like ChatGPT and other LLMs are our primary touch points with generative AI. But this doesn't mean we should only be generating content with LLMs (for context we'll also briefly touch on non-LLM probabilistic approaches as well). Since these powerful tools are new to all of us and none of us know the future, we'll explore together other ways of using generative LLMs and how this intersects with automation in general. **About David** David works with organizations in early planning for big transformations of complex suites of websites, applications, and systems. David helps companies set their vision, make key systems architecture decisions, and define how to make these major changes happen. Clients include Centers for Disease Control and Prevention; Central Bank of Belize; Mideast Broadcasting Corporation; National Academies of Science, Engineering, and Medicine; and Novartis.

THIS GAME IS BASED ON AN OLD GAME , SO MOST OFTEN YOU WILL NOTICE THAT PEOPLE ( THE FOUNDERS) ARE ADDED BEFORE THE RSVP EVEN OPENS. After that, few spots are available for first reserves and the Host has the right to choose the added people from the wait list (Based on dependability, punctuality and cooperation) ***No wait list show ups*** No-shows will be taken seriously and you lose your privilege to RSVP the next game. This is an early game, so you have to cancel the night before. If you cancel late, it will be considered no show. Please wear turf shoes (no cleats) in this field. Please use a clear profile picture so it is easier for us to know each other. if you don't have a clear picture, the host might cancel your rsvp. If you plan on playing with us , keep in mind we collect yearly donations (Collected once a year ,$25). You can zelle me (3189143325) or Venmo(@Aladdin-Alayoubi) or give cash.

Based on the Chinese Zodiac, 2026 is the year of the **HORSE.** Whether you are a horse or any other zodiac sign, you are all welcome to join us for a delicious Chinese lunch to celebrate the Chinese New Year. Please only RSVP if you are sure to attend as space is limited. Also, to ensure a smooth checkout process, please **BRING CASH** to cover the cost of your meal **plus 30% for tax and tip.** Some discussion about the HORSE from Astrology.com: "It is said that Horse would have finished the race in sixth place, but Snake snuck a ride in the equine hoof, unbeknownst to the host. When Snake jumped ashore, she startled Horse. In typical Horse fashion, this majestic creature reared back, and Snake slithered across the finish line first. This story exemplifies how Horse may run with full speed, strength, and intent after goals, promises, and love interests, but can also scare easily. Strengths: virile, easygoing, witty, honest, and outspoken Weaknesses: impatient, impulsive, and self-centered Compatibility: Tiger, Goat, or Dog Mixmatch: Rat, Ox, or Rooster Element: Fire Yin or Yang: Yang Years: 1966, 1978, 1990, 2002, 2014 Chinese mythology contains stories of flying horses, horses that are part dragon or deity, and a silkworm/mulberry origin story wherein a girl promises to marry a horse if he helps her find her father. When found, the father murders the horse to preclude the marriage, and the girl and horsehide transform into a silkworm on a mulberry tree – thus even today, you can see a horse’s face on the silkworm. Those born in the year of the Horse have inexhaustible energy (including potent sexuality), yet are easygoing, witty, honest, and outspoken. Horses are independent, adventurous, have a quick intuitive intelligence, and are good with money. They are decisive, generous, extremely popular, and can often be found in the middle of large social happenings." **DIRECTIONS TIP:** Enter the small shopping area from Route 50 heading East (just after stop light at Annandale Rd.). If you are heading west, turn left at the stop light (Annandale Rd.) then 1st left and then next left (backside of restaurant). Miu Kee Cantonese Restaurant 6653 Arlington Blvd. Falls Church, VA 22043 703-237-8899 [Miu Kee Menu: Explore Authentic Cantonese Seafood Delights](https://miu-kee.restaurants-world.net/menu)

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

ASH is Atheists, Skeptics and Humanists of First Unitarian Universalists of Columbus Ohio TBD Snacks are usually available, and you are welcome to bringing something to share!

**NEW LOCATION: Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: * 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. * 6:30 to 8:00 pm. Main meeting and presentation(s). See the handy Parking Map - we recommend street parking. [Street Parking Map](https://docs.google.com/presentation/d/1u2A4fLNlxwLJn0KA_hKc8bnFlFHLvsHBDh-_8wzX_tk/edit?usp=sharing) We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact centralohpython@gmail.com

**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** *Spec-Driven Development with GitHub Spec-Kit: From Intent to Implementation* Spec-driven development flips the traditional workflow on its head: instead of code being the source of truth, the specification becomes the backbone of design, collaboration, and delivery. In this session, we’ll explore how GitHub Spec-Kit enables teams to treat specifications as first-class artifacts—living documents that drive architecture, implementation, and verification. You’ll learn how Spec-Kit helps teams clearly express intent using structured, version-controlled specs that live alongside code. We’ll walk through a practical workflow that starts with defining system behavior and constraints, then progressively refines those specs into testable, automatable outcomes. Along the way, we’ll show how specs can reduce ambiguity, improve cross-functional collaboration, and make design decisions explicit before a single line of production code is written. This talk will cover: --What spec-driven development is (and what it isn’t) --How GitHub Spec-Kit fits into modern developer workflows --Using specs to align product, engineering, and AI-assisted development --Real-world examples of turning specs into implementations with confidence Whether you’re building greenfield systems, integrating AI into your stack, or trying to reduce costly rework, spec-driven development offers a scalable way to move faster without sacrificing clarity. Attendees will leave with concrete patterns and a clear mental model for adopting GitHub Spec-Kit in their own projects. **YouTube Link** TBA

Meet at Wolfe Park parking lot by tennis courts. We willl walk along Alum Creek trail, through Jeffrey Mansion Park then along Bexley neighborhood and back. Optional lunch at Trolley District.

Bring your business cards and network in person with other business professionals! Gold Star Referral Clubs is one of the most established professional networking organizations in the country, with multiple groups in central Ohio. Join us!