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)

[Book Your Classes by Clicking This Link! ](https://crowndancestudio.com/group-classes/) Kick off your week from **11:00 AM to 12:00 PM wit**h focusing on the smooth, elegant foundations of Ballroom dance. This session is perfect for seniors and families looking to improve posture and balance through the Waltz, Foxtrot, and Tango in a low-pressure, welcoming environment. Price: $25 Drop-in, Membership **DOES NOT** include this class!

Hello! We will meet at The Collective Offshore. Its on the corner of the building closest to the stage thats under construction. Their doors are blue. If you seen Encore, then you've gone to far. This walk we will be doing 2 laps around the lake, but feel free to only do 1 if you'd like. It takes roughly 35min to walk one lap. If there is rain, the event will be cancelled. The Collective Offshore: 10221 Wincopin Cir, Columbia, MD 21044 Please be respectful to everyone in the group. This group is created for everyone to enjoy themselves. If you'd like to chat to someone, please do! But some people might join us who just want to listen to whatever they choose and not talk to anyone and just enjoy having company while they walk. Which is what this group is all about! Please grab a coffee or bring a snack while we walk if you want. 😃 Whatever will bring you JOY!

The last planetarium event went so well let's see a different show. This one is called Stars Tonight. The show brings out the telescope to see the night sky: https://www.apsva.us/planetarium/weekend-programming Tickets are $5 and can only be bought with cash at the door. The show starts at 7:30 but let's meet up at Tortas Y Tacos La Chiquita lll in Arlington beforehand. It isn’t Star Wars themed but that won’t stop us from celebrating Star Wars Day. Free Parking: I attached a picture of a map that shows where some free street parking is. * N Nelson St on the East side of Quincy Park * N Stafford St on the West Side of Washington-Liberty High School * There are a few free street parking spots on N Quincy St across from the planetarium * In addition, the planetarium has a parking lot Metro is also an option. We are between the Ballston and Virginia Square metro stations. The David M Brown Planetarium is at 1426 N Quincy St, Arlington, VA 22207 right around the corner from Tortas Y Tacos La Chiquita lll.

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.

## Details Hello everyone! We climb at Crystal City Movement every Monday. Please read rest of the description carefully. We mostly do tope rope climbing but we can arrange bouldering sessions as well. If you prefer lead climbing please post on the comments to find your belay partner. \#\# Requirements * If you are not a Movement member, you'll get a daily pass. If you don't have the equipments you can rent them in the gym. * Please sign the waiver through: [https://movementgyms.com/waiver/](https://movementgyms.com/waiver/) * You can get a discounted day pass and free rental gear if you say you are here for my meetup All skill levels are welcome! If you are totally new to climbing and want to do top rope, then you have to have a belay certificate. In order to do that; * You can check Movement gym Intro to Rope Climbing class : [https://movementgyms.com/crystal-city/climbing/classes/](https://movementgyms.com/crystal-city/climbing/classes/) * After the course, you should do the 'Belay Check' which can be done as soon as 24 hours after you take the class. The test takes around 15 mins so it can be done before the climbing session. Before your first visit you may want to check the related webpage: [https://movementgyms.com/first-visit/](https://movementgyms.com/first-visit/) \#\# Where to meet To find us go down the stairs in front of the front desk. We will meet around the benches next to climbing walls.

**NEW EVENT!!!** Please be sure to RSVP on **[Eventbrite](https://www.eventbrite.com/e/1987978527290?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 Straight Allies Two-Spirit

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!

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.

If you're flexible at midday on Wednesday May 6, please join me and @Alison Butler to see the much-anticipated comedy "The Devil Wears Prada 2" at noon at the Alamo Drafthouse Cinema in Crystal City! Blurb: "Twenty years after making their iconic turns as Miranda, Andy, Emily and Nigel--Meryl Streep, Anne Hathaway, Emily Blunt and Stanley Tucci return to the fashionable streets of New York City and the sleek offices of Runway Magazine in 20th Century Studios' "The Devil Wears Prada 2," the eagerly awaited sequel to the 2006 phenomenon that defined a generation." Tickets are about $20 and they are for specific comfy, reclining seats; let's update in the comments about which row to sit in together (and please add your cell number when requested with your RSVP so we can be sure to connect!). You can order food and drink right at your seat ([here's the menu](https://crafthouse-assets-prod.s3.amazonaws.com/files/venues/crystal-city/ADC_CoreMenu_Tier3_CrystalCity_Digital_3-16-26.pdf)) and whoever still has time can also gather afterward to discuss the film together. There's a (paid) parking garage, and the cinema is only 0.3 mile from the Crystal City metro station on the Blue Line. Who is in? Looking forward!

**The next GeoDC will be held on Wednesday, May 6 from 6-9pm at Sudhouse DC (1340 U St NW, Washington, DC 20009) with the program starting at 7pm.** We’ve got 3 presentations scheduled for the evening– Please check out the program details below. Join us early from 6-7pm to grow your network, socialize and grab a snack. Our host, Sudhouse DC has a solid happy hour menu with reasonably priced food and beverage from 4-8pm. Please remember to [RSVP through the GeoDC Meetup page](https://www.meetup.com/geo-dc/), and we hope to see you in a few weeks. *If you’d like to present or sponsor a future GeoDC Meetup, please complete this [form](https://forms.gle/QbAXPfrDnX12GGaS8).* **Brian Davidson:** **Zero to Map: A 10-Minute Geospatial Speedrun with Gemini** * Think building a functional mapping application requires hours of boilerplate and API frustration? Think again. In this talk, we’ll race against the clock to build a live mapping app from scratch using Gemini and Antigravity. You’ll see how to leverage LLMs to handle everything from a mapping provider integration to complex coordinate rendering in minutes. Whether you’re a seasoned GIS pro or a curious dev, my hope is you'll leave with a better understanding of how to turn your idea into a working map before your coffee gets cold. **Noah Goodman**: **Voyager Solutions** * The Voyager platform has enabled customers to resolve data management issues, such as duplication, lack of governance & metadata. Demos of the Voyager platform capabilities and will discussion of a recent State DOT project. **Dr. Aditya Kapoor: Assessment of Inundation Dynamics in Nebraska Using AlphaEarth Foundations** **Embeddings** * This study demonstrates that AlphaEarth Foundation Embeddings (AFE) provide a highly efficient, "analysis-ready" framework for mapping regional surface water inundation without the computational burden of traditional multi-source data fusion. By applying Random Forest classifiers to AFE data across 901 Nebraska lakes from 2017 to 2025, I found that this method outperformed existing products like Dynamic World, which exhibited estimation errors of up to 43.8%. The analysis revealed a critical environmental trend: a mean inundation decline of over 6,600 m² per year, closely mirroring a regional rainfall reduction of 14.18 mm/year. Ultimately, the findings highlight AFE as a scalable tool for identifying hydrological instabilities, particularly in smaller water bodies, offering significant advantages for real-world water resource planning and flood risk assessment.

Come learn how money really works. We’ll cover how to grow it, protect it, get out of debt, and use smart retirement and infinite banking strategies to build long-term security.

Join Service Design DC for a community movie night focused on learning, reflection, and connection through two keynote presentations from last year’s Service Design Global Conference. SDGC25 brought the global service design community together around the theme “Business Transformation by Design,” exploring how service design can influence strategy, operations, and customer experience across organizations. For this gathering, we’ll watch 2 selected talks from SDGC25, then open up a casual group discussion about what resonated, what feels relevant for our work now, and what these ideas might mean for service design practice in DC. The 2025 conference centered on service design’s role in helping organizations navigate cross-functional transformation, making these talks especially relevant for practitioners working across systems, teams, and change. **What to expect** * Watch 2 selected presentations from SDGC25 together. * Casual facilitated discussion after each talk. * Time to connect with other service design and adjacent practitioners in the DC area. **Evening Agenda** 6:00 P.M. - Doors Open + Socializing & Networking 6:30 P.M. - First talk highlights + conversation 7:15 P.M. - Second talk highlights + conversation 8:00 P.M. - Wrap up **Many thanks to our host and sponsor, MediaBarn!** *Mediabarn’s customer-centric philosophy defines who we are.* *In its simplest form, we are committed to applying Human-Centered Design (HCD) methods to understand customer needs, collect feedback, and use that feedback to improve services and products. Whether it’s for customers, citizens, or employees, our Experience Design Studio creates research-informed designs to improve the experience of every human involved.*

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

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 **Radio Signal Analysis Using SDRs and OpenWebRX+** with **Scott McCrory**. Details are are [core.radio](https://core.radio/).

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.

Hello podcasters! We are rebooting the Columbus Podcasters User Group this May 11th! Come join us at the Roosevelt Coffee house in Lewis Center from 6-8pm. Help us organize future meetups! Thank you **Roosevelt Coffeehouse** and the **Olentangy Brewery** for hosting our meetup!

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!

TOPIC (TBD): Meeting Schedule: 1. 6:00 - Introduction, Meet New Members 2. 6:10 - Old Business 3. 6:20 - New Business 4. 6:30 - Pre-Shoot Briefing/Education 5. 7:15 - Break 6. 7:30 - Image Critique 7. 8:00 - Adjourn Pre-Shoot Brief/Education: NIK Collection 8 Image Critique: Previous Photoshoot Images (iPhone images and Christmas Cards). If anyone has images they would like critiqued, please provide them at the beginning of the meeting. Providing Images for Critique: For now, I will collect images at the beginning of the meeting on a USB memory stick. My computer has USB-C ports, so a USB-C memory stick or one with dual (USB-C / USB-A) ports will be needed. Images should follow these format rules: JPG - 80% quality or higher 132 dpi resolution 2048 pixels across the long edge Embedded colorspace - sRGB

FREE event [https://www.ccad.edu/chroma](https://www.ccad.edu/chroma) Friday, May 15, 3–7 p.m. CCAD campus, 60 Cleveland Ave, Columbus, OH Join Columbus College of Art & Design for *2025* *Chroma: Best of CCAD*, our annual campuswide exhibition showcasing outstanding student work from across the college’s academic programs. This faculty-juried show features select work from CCAD students of all class years, and is a can’t-miss end-of-year campus celebration recognizing their tremendous achievements. It’ll be a night of fun and entertainment, with interactive games, animation and film screenings, art symposiums, poetry and prose readings, and more (along with some of the best local food trucks). *Chroma* is free and open to all. Many exhibitions including... **Game Art & Design:** **DSB, first floor, Welcome Center lobby and Room 115**