Software Defined Radio

Welcome to our new home at the historic Tivoli Theater! Please check our details for access to the space on [our website](https://www.hacdc.org/visit/). Join the discord for questions / help getting in (use channel #let-me-in) [https://discord.gg/dNjuNhNmeT](https://discord.gg/dNjuNhNmeT)

Join us for GRIDCON2026, GRID’s annual live real estate conference built for investors, agents, operators, and entrepreneurs who are ready to move from active income to long-term ownership. 📍 Tysons Corner, Northern Virginia 📅 June 1–2, 2026 🎟️ Register at: [www.gridcon2026.com](http://www.gridcon2026.com) Over two days, GRIDCON2026 brings together the people, strategies, and conversations shaping the next level of real estate investing. This event is designed to help you identify where they are, what is holding them back, and what needs to be built next. Expect a high-energy room filled with real estate investors, agent-investors, operators, capital partners, community leaders, and entrepreneurs focused on deals, systems, scale, and long-term wealth. Featured speakers and operators include **Brandon Brittingham,** leader of one of the highest-producing real estate teams in the country with over **$1.5B+ in annual sales volume**; **Rob Chevez**, **founder of GRID** and long-time real estate investor; **J Scott, bestselling BiggerPockets author** and investor; **John Rubino, economist and wealth strategist; Stella Han, founder of Fractional;** **Tom Zeeb**, **nationally recognized sales trainer**; **Veronica Figueroa**, leader of a **top-producing real estate organization**; and more operators, investors, and entrepreneurs actively building and scaling in today’s market. This is not a theory-based event. GRIDCON2026 is built for practical insight, real conversations, and actionable strategies around: 🔥 Real estate investing 🔥 Deal flow and capital 🔥 Systems and scale 🔥 Marketing and lead generation 🔥 Team-building and operations 🔥 Wealth-building through ownership 🔥 Relationships that create momentum Day 1 takes place at Valo Park in Tysons Corner and includes main-stage sessions, tactical conversations, networking, and an on-site networking mixer. For those who want a deeper experience, Day 2 VIP takes place at Bull Run Winery and includes exclusive sessions, small-group conversations, peer hot seats, hosted lunch, wine tasting, and a guided Civil War Battlefield Experience. Whether you are building your first investment strategy, scaling a real estate business, growing as an agent-investor, or looking for the right room to help you break through your next ceiling, GRIDCON2026 was created to connect you with the people and frameworks that move you forward. Seats are limited, and VIP access is intentionally capped. 🎟️ Learn more and reserve your seat at [www.gridcon2026.com](http://www.gridcon2026.com)

Volunteer with us refurbishing donated bicycles to help us get them back out in the community! This event is open to both new and existing volunteers. No mechanical experience is necessary. Note: The warehouse location is in the alley behind 1502 Mt Vernon Ave. Enter through the gray door next to a roll-down garage door. If you drive to the location, be sure to park in the street, not in the alleys or parking lots surrounding the warehouse. And wear clothes you don't mind getting dirty with bicycle grease! Please be aware that volunteers under 18 need a parent or guardian to accompany them to their first volunteer experience and sign a liability waiver, while volunteers under 16 need a parent or guardian to accompany them at all times while volunteering with Vélocity.

*From the [publisher's website](https://www.simonandschuster.com/books/Cuba-(Winner-of-the-Pulitzer-Prize)/Ada-Ferrer/9781501154560):* **WINNER OF THE PULITZER PRIZE IN HISTORY** **WINNER OF THE LOS ANGELES TIMES BOOK PRIZE IN HISTORY** **“Full of…lively insights and lucid prose” (*The Wall Street Journal*) an epic, sweeping history of Cuba and its complex ties to the United States—from before the arrival of Columbus to the present day—written by one of the world’s leading historians of Cuba.** In 1961, at the height of the Cold War, the United States severed diplomatic relations with Cuba, where a momentous revolution had taken power three years earlier. For more than half a century, the stand-off continued—through the tenure of ten American presidents and the fifty-year rule of Fidel Castro. His death in 2016, and the retirement of his brother and successor Raúl Castro in 2021, have spurred questions about the country’s future. Meanwhile, politics in Washington—Barack Obama’s opening to the island, Donald Trump’s reversal of that policy, and the election of Joe Biden—have made the relationship between the two nations a subject of debate once more. Now, award-winning historian Ada Ferrer delivers an “important” (*The Guardian*) and moving chronicle that demands a new reckoning with both the island’s past and its relationship with the United States. Spanning more than five centuries, *Cuba: An American History* provides us with a front-row seat as we witness the evolution of the modern nation, with its dramatic record of conquest and colonization, of slavery and freedom, of independence and revolutions made and unmade. Along the way, Ferrer explores the sometimes surprising, often troubled intimacy between the two countries, documenting not only the influence of the United States on Cuba but also the many ways the island has been a recurring presence in US affairs. This is a story that will give Americans unexpected insights into the history of their own nation and, in so doing, help them imagine a new relationship with Cuba; “readers will close [this] fascinating book with a sense of hope” (*The Economist*). Filled with rousing stories and characters, and drawing on more than thirty years of research in Cuba, Spain, and the United States—as well as the author’s own extensive travel to the island over the same period—this is a stunning and monumental account like no other. ***How to find us:*** We meet in the upstairs seating area at Zorba's in Dupont Circle. Look for a sign on a table with a picture of the book's cover on it. Links: **[Bookshop](https://bookshop.org/a/91030/9781501154560):** **By purchasing your book through this link, you help support local bookstores and defray the cost of DCIA's Meetup subscription.** [Amazon](https://www.amazon.com/Cuba-American-Dr-Ada-Ferrer/dp/1501154559) [Simon & Schuster](https://www.simonandschuster.com/books/Cuba-(Winner-of-the-Pulitzer-Prize)/Ada-Ferrer/9781501154560) [Wikipedia page about Ada Ferrer](https://en.wikipedia.org/wiki/Ada_Ferrer)

Do you find yourself showing up in meditation sessions wondering why your mind won’t settle down?Are you trying to figure out why your body seems to become so uncomfortable in meditation sessions? Join Marsha, non-conventional meditator, certified yoga therapist, trauma sensitive yoga facilitator, and energy and sound healing facilitator, as we show up and unpack ways of meditating that uniquely resonate with you. Whether you find comfort in standing, sitting in a chair or on a yoga mat, or lying on the floor, eyes open or closed, you are welcome to show up just as you are, as we seek peace through movement and compassionate sharing experiences, while embodying the physical, intellectual, emotional, and spiritual benefits of meditation, energy + sound healing, and yoga therapy. **Please reserve your spot at www.piesfitnessyoga.com**. The session is offered both InStudio and OnLine. The Zoom link for the OnLine session will be emailed 15 minutes before class starts to those who are registered at www.piesfitnessyoga.com. **Sign up for sessions must be made at least 2 hours prior to class.** The address is 1322 Prince St Alexandria, VA 22314. Our entrance is located on the side of the building, parallel to West St. **Street parking is available and additional parking is located at Shiloh Baptist church, spaces 36,37,38,39.** The church is located across the street from the studio, on the corner of Duke St. and West St. Discount is available to seniors, teachers, students, emergency responders, and military. All can save by purchasing class packs.

**NEW EVENT!!!** Please be sure to RSVP on **[Eventbrite](https://www.eventbrite.com/e/1988727222658?aff=oddtdtcreator)** so we have an accurate guest list. Pink Poodle Club is Spark's weekly Yappy Hour — every Monday on the back patio from 5–7pm. $1 Scooby Snacks for hoomans and $1 pup cups for the doggos. Come join us for a fun and **dog-friendly** gathering! It’s the perfect chance to meet new people, share stories, and enjoy a relaxed atmosphere with the **LGBTQ+ community**. Whether you're looking to make friends or just hang out, everyone’s welcome. Grab your favorite drink and let’s make some great memories together! This event is free to attend. We hope to see you there. In addition to coffee selections, the venue offers a good food and drinks [menu](https://spark-dc.com/pages/menu-2). We encourage you to register your attendance in advance. We hope to see you there. When you arrive with your dog, order on your own from the [menu](https://spark-dc.com/pages/menu-2). Then meet and mingle with LGBTQ+ folk and their dogs on the back patio. **Metro Directions:** Be eco-friendly. U Street Metro (Yellow/Green line) is only a few blocks away. Take the 13th Street Exit. The venue is adjacent to Crush Bar. This event is a safe space for everyone under the rainbow. Please feel free to invite all your friends to join you there! This event is hosted by **[Go Gay DC](https://www.gogaydc.com)**, Washington DC's inclusive LGBTQ+ community focused on friendship, leadership, and service. It now reaches over 10K fabulous people and is growing fast. Visit [https://www.gogaydc.com](https://www.gogaydc.com) . Go Gay DC's founder is **[TJ Flavell](https://www.linkedin.com/in/tjflavell/)**. Go Gay DC is on social media: Join the Facebook Group [https://www.facebook.com/groups/GoGayDC](https://www.facebook.com/groups/GoGayDC) Like the Facebook Page [https://www.facebook.com/GoGayDC](https://www.facebook.com/GoGayDC) Follow on Instagram [https://www.instagram.com/GoGayDC](https://www.instagram.com/GoGayDC) Follow on Threads [https://www.threads.com/@GoGayDC](https://www.threads.com/@gogaydc) Follow on Bluesky [https://gogaydc.bsky.social/](https://gogaydc.bsky.social/) Follow on X [https://www.x.com/GoGayDC](https://www.x.com/GoGayDC) Watch on YouTube [https://www.youtube.com/GoGayDC](https://www.youtube.com/GoGayDC) LinkedIn [https://www.linkedin.com/showcase/GoGayDC](https://www.linkedin.com/showcase/GoGayDC?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExZG1DTnM0VnJybG83U3FWcnNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR765Xxf5t8wFzbCac74QNX3p0Bs2oT0drXZoOmLV63J8cURMl3ta5b8iP3ztg_aem_nSdndpxd5-hXJ8myNF2_vQ) Search keywords: LGBT LGBTQ LGBTQI LQBTQIA Lesbian Gay Bisexual Transgender Queer Intersex Two-Spirit Straight Allies

Want to mess with some electronics? Or perhaps contribute to HacDC's main group project? HacDC's latest event brings hardware projects to the community. We will focus primarily on the main project (Space Blimp!) but please feel free to bring some of your own projects to show off and work on!

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.

With war breaking out, the gnomes of Brastlewark in Cheliax can no longer cling to their carefree ways. Self-proclaimed King Drum Thornfiddle is eager to ingratiate himself to Queen Abrogail, and so conscripts the city's magical and creative resources towards the war effort. A few gnomes have broken free, and they have brought evidence of the various works being created in Brastlewark. They're no fighters, though. It'll be up to the Pathfinders to get them safely across the border to Andoran and freedom. A Pathfinder Society Scenario designed for 1st- through 4th-level characters, playable in 4-5 hours. Written by Elizabeth V Nold **Scenario tags:** Hellfire Crisis

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/")

PLEASE CHECK THE ONLINE MEDITATION CALENDAR FOR DETAILS OF THESE MORE THAN 50 SERVICES A WEEK- https://onlinemeditation.yogananda.org/calendar/

**Click** [here ](https://www.eventbrite.com/e/patio-social-for-neurodivergent-adults-tickets-1990579924138)**for non-members to register and submit your info for the activity.** **[Constellations ](https://www.harringtonmatchmaking.com/constellations-membership)Patio Social + community lore activity** in Arlington, Virginia. This will be a relaxed patio social for neurodivergent adults (most will be 20s/30s) focused on conversation and meeting new people through a low-key activity. Participate in our “Community Lore” activity — a social scavenger hunt-style game designed to make mingling feel easier and spark better conversation. Before the event, attendees will submit a few fun facts, unusual skills, niche interests, and/or random details about themselves. We use these anonymous submissions to create the activity cards. When guests arrive, anyone who wants to participate will receive a card featuring fun facts submitted by other attendees. As you mingle throughout the evening, you’ll try to figure out which person matches each item on your card. We’ll have reserved patio seating, casual games, complimentary appetizers, and drinks available for the group. Alcoholic beverages and additional food or entrees can be purchased individually. While we do have reserved patio seating, this may not be the best fit for individuals who are highly sensitive to noise or busy environments. **Click [here](https://www.eventbrite.com/e/patio-social-for-neurodivergent-adults-tickets-1990579924138 ) for non-members to register and submit your info for the activity.**

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. **New to electronics or curious about tinkering?** You’re absolutely welcome. If you’re a beginner and want to experiment, I’ll have a couple of starter kits available so you can try things out—whether that’s blinking your first LED, putting something on a display, or experimenting with simple sensors. No pressure and no experience required—just an interest in learning and building. While we continue to pursue a more permanent venue for this Meetup, we’ll be using public library facilities based on availability. This session will be at the Worthington Park Library in the Olentangy Meeting Room.

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

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

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

**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**!

QA or the Highway is a one-day, affordable, regional, professional conference featuring real-world experience and thought leadership in the QA and testing industry. This is a ticketed event please register here: https://www.qaorthehwy.com/ Featured Keynote Speakers: **Matthew-Hope Eland** **(Wizard at Leading EDJE)** \- An AI Specialist and Wizard at Leading EDJE who is known to teach software engineering\, AI\, and data science concepts in the most ridiculous ways possible\. Matt has used machine learning to settle debates over whether Die Hard is a Christmas movie\, reinforcement learning to drive the behavior of digital squirrels\, data analytics to suggest improvements to his favorite TV show\, and AI agents to play board games and create an AI agent with the personality of a dog\. Matt is the author of "Data Science in \.NET with Polyglot Notebooks" and "Refactoring with C\#" as well as several LinkedIn Learning courses\. Matt helps organize the Central Ohio \.NET Developer Group\, runs several blogs and a YouTube channel\, has a Master’s of Science in Data Analytics\, and is a current Microsoft MVP in AI and \.NET\. **Tatyana Arbouzova** **(CEO at Innovate QA)** \- Tatyana Arbouzova is an engineering and business leader with a strong background in Quality Engineering across multiple industries\, including Big Tech\, Healthcare\, and Entertainment\. She has held leadership roles at world\-class companies such as Microsoft\, VMware\, Disney\, and The Pokémon Company International\, where she focused on building quality\-driven cultures and scaling teams to deliver high\-impact products\. With decades of experience\, Tatyana has helped organizations transform their quality practices so teams can deliver software efficiently\, confidently\, and with measurable business outcomes\. Today\, Tatyana advises software companies on adopting AI to optimize quality practices and improve how software is delivered at scale\. She is also a passionate community builder and the founder of Innovate QA\, a thriving Seattle\-based community and conference for quality professionals\.

Come join CORGSCON the Columbus, Ohio retro gaming expo at the Bricker Building – Ohio Expo Center June 6th-7th Saturday: 11am-6pm Saturday After Party: 6PM – 10PM Sunday: 11am-4pm PLEASE NOTE: RSVP for this event does NOT give you access to the event. Please buy tickets for the event on the website here or onsite at the event: [https://www.corgscon.com/tickets/](https://www.corgscon.com/tickets/) We'll have COGG game developers there showcasing their games alongside the [GDEX game expo](https://www.thegdex.com/) also happening later this year. Find out more here: [https://www.corgscon.com/](https://www.corgscon.com/)