Decentralized Systems & Applications

Follow the appeal of Roman Sterlingov, convicted of the victimless "crime" of providing everyday Bitcoiners privacy. The next stage of the case is oral arguments in DC Court of Appeals, come to support Roman and the future of Bitcoin ownership in US. Roman has been convicted by of allegedly operating BitcoinFog, a mixing service accused of anonymizing Bitcoin transactions, a small portion of which is thought to be attributable to illicit usage. The charges identify no victims or financial loss and instead attribute to him any potential crimes of anybody on the internet who was using this privacy tool. Learn more and help Roman's defense at [freeroman.org](https://freeroman.org)

If you love A Cappella Singing come check out the Harmonizers and Metro Voices...The lower voice and treble voice choruses- both part of the Alexandria A Cappella Collective. If you love 4-part harmony you'll want to visit us! We will be rehearsing on May 12th at AlexRenew, 6th Floor, 1800 Limerick St., Alexandria, VA 22314. We pride ourselves on providing opportunities for everyone to sing. We welcome everyone to visit our rehearsal and enjoy the singing while learning more about us!

It's Indie Dev Night! Bring your games that you've made, your game idea, or just your passion for game development! This is an informal event to talk game development with like-minded folks. We'll be hosting this IN PERSON at the MLK Jr. Library in room 401-A Closing Time at the library: 8:30 PM

Have you been thinking about trying self-defense training, but do not want a loud, aggressive, or overly competitive environment? This free intro class is a simple way to get started. Maryland Systema offers practical self-defense training for adults in Rockville with a focus on movement, awareness, breathing, posture, and calm under pressure. This class is designed for beginners and first-timers who want real-world self-defense training in a welcoming setting. You do not need experience. You do not need to be in top shape. You do not need a martial arts background. You just need to show up ready to learn. This is not a sport-based class built around winning points, memorizing routines, or trying to look impressive. It is a more practical approach to adult self-defense training that helps you stay balanced, aware, and functional when things feel uncertain. If you have been searching for self-defense classes in Rockville, beginner self-defense near you, or practical self-defense training for adults, this class is a good place to start. **What you will work on** * Breathing and staying calm under pressure * Movement that improves balance and mobility * Awareness and posture * Simple partner drills * Practical self-defense training for beginners **Who this class is for** * Adults new to self-defense training * Beginners looking for a low-pressure class * People who want practical self-defense instead of sport martial arts * Adults in Takoma Park, Silver Spring, Rockville, and nearby areas looking for realistic self-defense classes **What to wear** Please wear comfortable workout clothes. No uniform is required. **Why start with this class** This free intro class gives you a chance to experience the training, meet the group, and see whether Maryland Systema is the right fit for you before joining regular weekly classes. **RSVP** Reserve your spot and come try a beginner-friendly self-defense class in Rockville.

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

Simply SHE is a weekly podcast that is a window into the soul of the every-day woman where we have candid conversations about the importance of intention in your daily life, the trials and tribulations of trying to advance in today’s fast-paced world and the importance of being empowered to achieve your goals. We offer live training, online consultations and 1-on-1 coaching. Our motto is “Slay Hard Everyday” so you can live your best life. Listen & Subscribe Here: https://www.isimplyshe.com/podcast

Let's get together to play some fun BB level Quads games at Bluemont. **Format**: Doubles **COST**: FREE **Court Type**: Outdoor grass **Minimum Skill Requirements**: Intermediate-BB (click [here](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/mobilebasic) for details) \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Smiley Social documents:** 1. [Group Rules ](https://docs.google.com/document/d/1HrG35p_0M08leRvCp8XWG3CMkr_GL928XFabl5T6Dvg) 2. [Liability Waiver ](https://docs.google.com/document/d/1W2mq-7m99lmvd7gdWYaSUFtvVg4UGnzV6koafAbHmco) 3. [Volleyball Levels](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/)

Healthcare organizations are increasingly using cloud-based real-world evidence (RWE) platforms to power clinical research, population health analytics, and AI-driven insights. However, building these systems on AWS introduces complex governance challenges around privacy, compliance, and multi-institution collaboration. This session explores how to architect data governance into healthcare analytics platforms on AWS, focusing on practical design patterns rather than policy theory. We examine how ethical data stewardship principles such as consent, accountability, and responsible data use, can be implemented using cloud-native controls and services. The presentation walks through key architectural considerations for secure RWE platforms on AWS, including role-based access control, auditability, data minimization, and encryption, and how these capabilities support compliance requirements such as HIPAA and GDPR. Attendees will learn how federated, multi-account AWS architectures enable collaboration across institutions while preserving local data ownership and control. We will also discuss privacy-preserving analytics patterns on AWS, including approaches that support federated learning, differential privacy, and secure computation to enable AI-driven insights without exposing raw patient data. Practical implementation trade-offs such as performance, scalability, and operational complexity will be highlighted using real-world platform scenarios. Attendees will leave with actionable AWS architecture patterns and governance strategies for building secure, compliant, and scalable real-world evidence platforms that unlock innovation while maintaining patient trust.

🗒️ **Details** Grafana 13 just dropped at GrafanaCON 2026 and we're not wasting any time. Join us at Clare & Don's Beach Shack in Falls Church, VA for a free meetup where we dig into what's actually new, what it means for your stack, and where observability is heading. If you work in DevOps, SRE, or platform engineering in the DMV, this is your people. Whether you've been running Grafana for years or you're just getting started, you'll leave with something useful. 📋 **Agenda** 🎉 **5:30 – 6:00 — Kick-Off & Check-In** Grab a plate of food, meet the people around you, and get settled in. We're at Clare & Don's so the vibes are already taken care of! 🎙️ **6:00 – 6:30 — Rob Santos: Grafana 13 & AI in Observability** Grafana Assistant is now baked into the platform and it changes a lot. Rob breaks down what's new in Grafana 13, how AI is reshaping the way teams monitor and troubleshoot, and what it actually looks like in practice. No sales pitch, just real talk. [Rob Santos, Senior Solutions Engineer @ Grafana Labs](https://www.linkedin.com/in/robert-j-santos/) 🎙️ **6:30 – 7:00 — Christopher Field: Building ML-Powered Apps with Grafana** Christopher shares how Theia Scientific built a custom application platform that combines Grafana, machine learning, and Jupyter notebooks to power materials research and non-destructive testing workflows. A cool real-world example of Grafana being used way outside the typical use case. *[Christopher Field, Co-Founder, President & Principal Investigator @ Theia Scientific](https://www.linkedin.com/in/chrisrfield/)* 💬 **7:00 – 7:45 — Networking & Open Q&A** Bring your questions, your war stories, and your opinions. This is where the good conversations happen. 🔚 **7:45 – 8:00 — Wrap Up** *** **Spots are free but limited — grab yours before they're gone.** We look forward to seeing you there! *** 📌 **P.S.** Stick around until the end — we're raffling off two things: 🎁 A Grafana swag bundle 🔧 A $100 gift card to Craftsman Autoshop in Vienna, VA with a goodie basket

Have you been thinking about trying self-defense training, but do not want a loud, aggressive, or overly competitive environment? This free intro class is a simple way to get started. Maryland Systema offers practical self-defense training for adults in Takoma Park with a focus on movement, awareness, breathing, posture, and calm under pressure. This class is designed for beginners and first-timers who want real-world self-defense training in a welcoming setting. You do not need experience. You do not need to be in top shape. You do not need a martial arts background. You just need to show up ready to learn. This is not a sport-based class built around winning points, memorizing routines, or trying to look impressive. It is a more practical approach to adult self-defense training that helps you stay balanced, aware, and functional when things feel uncertain. If you have been searching for self-defense classes in Takoma Park, beginner self-defense near you, or practical self-defense training for adults, this class is a good place to start. **What you will work on** * Breathing and staying calm under pressure * Movement that improves balance and mobility * Awareness and posture * Simple partner drills * Practical self-defense training for beginners **Who this class is for** * Adults new to self-defense training * Beginners looking for a low-pressure class * People who want practical self-defense instead of sport martial arts * Adults in Takoma Park, Silver Spring, Rockville, and nearby areas looking for realistic self-defense classes **What to wear** Please wear comfortable workout clothes. No uniform is required. **Why start with this class** This free intro class gives you a chance to experience the training, meet the group, and see whether Maryland Systema is the right fit for you before joining regular weekly classes. **RSVP** Reserve your spot and come try a beginner-friendly self-defense class in Takoma Park.

Join StepMoms of the DMV for an in-person coffee meetup! This casual and supportive gathering is a space for stepmoms to share experiences, offer advice, and connect with others navigating similar challenges. Whether you’re a seasoned stepmom or just beginning your step-parenting journey, this event is open to all. Grab your favorite coffee, settle in, and let’s chat about the unique dynamics of blended families and how to thrive as a step-parent. Let’s celebrate StepMother’s Day together with people who truly get it — building community, encouragement, and connection along the way!

\-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LUMA)!](https://luma.com/kfs3cotc) \-\-\-\-\-\- Join us for an evening of collaborative problem-solving as we work on a variety of civic tech projects together. Project needs vary but often include brainstorming, researching, writing, coding, or analyzing data. Check out [our website](https://www.civictechdc.org/projects) for a list of projects which may make an appearance! Meet other civic tech enthusiasts. Learn new skills. Contribute to a project to improve a local civic issue. **All are welcome and collaboration is encouraged.** Laptops are recommended but not required. **Where do I register?** To better serve our growing community, we’re transitioning our event registrations to Luma! **We still love Meetup** Meetup has been an incredible platform for us to build and connect with our community. We’ll continue sharing upcoming events there so that new people can find us, but Luma will be our primary registration platform moving forward. **Why we're making the switch** Meetup’s registration system has some limitations, and we need more flexibility to manage sign-ups and engagement. \-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LUMA)!](https://luma.com/kfs3cotc) \-\-\-\-\-\-

Hello everyone! Who doesn't love discussing AI over mini-golf! We'll be meeting at Starr Hill Tysons Biergarten at the top of the Capital One Building. There's mini-golf, corn-hole, and beer on tap. Come have some fun! Guaranteed fun time, or else your first putt is free :) **Location:** Starr Hill Tysons Biergarten, 1805 Capital One Dr S Suite 1100, Tysons, VA 22102 **\*\* We're on the Roof! \*\*** **Overview:** Join us at AI Innovators Network for our upcoming meetup in Tysons dedicated to exploring the latest trends in Artificial Intelligence. Whether you're an AI enthusiast, a professional, or someone curious about the intersection of technology and AI, this event is perfect for networking, learning, and sharing insights. Connect with like-minded individuals from DC, Northern Virginia, and Maryland as we dive deep into the opportunities and challenges of integrating AI. Don't miss this opportunity to be part of the conversation driving innovation and progress in Artificial Intelligence.

Join your HacDC Squad for a fun gaming session. Plan for 5/16/2026: Clone Hero (Guitar Hero clone) Deep Rock Galactic (on sale for $9 right now) L4D2 ($10) Last Train Outta' Wormtown (Free to join a lobby) Straftat (Free) Halo Infinite (Free) Suggested donation $10, NOTAFLOF Our Discord link is [https://discord.gg/YTeBg2fEgX](https://discord.gg/YTeBg2fEgX) Send a message to the #let-me-in channel upon arriving under the Gala theater marquee.

This monthly Sistership Circle is an invitation to step out of the busyness of everyday life and into a space of intentional connection. *** **Registration:** Please go directly to our Eventbrite page to register: [https://sistership-circle-may-2026.eventbrite.com](https://sistership-circle-may-2026.eventbrite.com) *** Whether this is your first time or you’ve joined before, you are warmly welcome. This is not a casual social meetup. It is a thoughtfully held space where you don’t have to perform, fix or hold everything together. *** **What to expect:** This is a guided, small-group experience that may include: • grounding and gentle breathwork • simple nervous system support practices • facilitated group conversation • time for reflection and integration ✨ We intentionally keep this gathering small (up to 12 women) to preserve the intimacy and quality of the experience. *** Women often leave feeling: • more grounded • more connected • more supported • and more themselves Each month offers a unique theme, while holding a consistent intention: to create a space where you can arrive as you are, exhale, and feel supported.

**Title**: Amplifying Engineering Skills with Claude Code In this session we will dive into how Claude Code can augment modern engineering practices, from rapid prototyping and refactoring to test generation and documentation. We’ll cover real-world use cases, integration patterns, and tips for getting the most out of AI in your development lifecycle. 6-6:30p.m. - food & drinks 6:30-7:30p.m. - Presentation 7:30-8:00p.m. - Q&A and Possible concept presentation for feedback

We have many cats and kitties hoping to find their fur-ever families. Come meet them at [Pet supplies Plus](https://www.petsuppliesplus.com/store/va/sterling/4487-sterling/4487) in Sterling from Noon to 2pm on Saturday, May 17th. For a sneak peek of our adoptable animals, please visit the [Humane Society of Loudoun County website](https://humaneloudoun.org/adopt/)! If a particular fur-baby (or two) catches your eye, [complete a no-obligation application today](https://humaneloudoun.org/adopt/adoption-process/) to expedite the application process.

This is our weekly training session. NOVA Jujutsu is a self-defense focused system incorporating Geri (Kicking), Atemi (Striking), Uke (Blocking), Tai Sabakai (Body Movement), Tai Hodoki (Escapes), Kansetsu Waza (Joint Locks), Nage Waza (Throwing), Shime Waza (Choking), Katame Waza (Grappling), Tantojutsu (Knife), Bojutsu (Bo), Kenjutsu (Sword), and Kata (Forms). Come on down to a class and see for yourself what this group has to offer. You will get a great workout! You will have an awesome learning experience! You will meet some good people! We look forward to meeting you. See you there. TAGS: japanese, martial arts, self-defense, jujutsu, jujitsu, juijitsu, bujutsu, defense, karate, koppo, kenjutsu, bojutsu, tantojutsu

Join us for a special session of our study group. Instead of continuing our coverage and discussion of the book "Domain-Specific Small Language Models", in this session, members of the group will present AI projects they have been working on, relating to the recent discussions of the group including the utilization of Large and Small Language Models. Please find the agenda for our upcoming session below: \- 7:00 \- 7:05: Introductions \- 7:05 \- 7:20: Project 1: The Model Context Protocol \(MCP\) – Venky will discuss the protocol's functionality and demonstrate an MCP server he developed\. \- 7:25 \- 7:40: Project 2: Page \- A Virginia Legislative Session Chatbot – Ron will describe a RAG system he developed\, covering various implementation approaches and lessons learned\. \- 7:45 \- 8:00: Project 3: Menta \- A Small Language Model for Mental Health – Odysseas will present an SLM designed to assess mental health conditions using message text\. \- 8:05 \- 8:20: Project 4: Open Brain – Richard will discuss an open\-source\, distributed\, personal AI solution based on an idea by Nate B\. Jones\. \- 8:20 \- 8:30: Closing comments and conversation

You are invited to Heal and RELAX with doTERRA Essential Oils! You will receive one of two introductory applications: #1 The digestive, immune, and cardiovascular systems or #2 The musculoskeletal, immune, and respiratory systems Essential oils support the body in its healing work. Symphony of Cells (SOC) is a collection of 21 essential oil applications that target a different body system. Applying the oils to the back and the feet is selected because of the large number of nerve endings along the spine and on the bottom of the feet. Nourishing the nerve endings helps to feed all the organs and glands of the body. Essential oils are natural plant oils obtained from different parts of the plant and easily recognized and used by the body to help achieve balance and assist in cleansing of foreign substances. SOC was created by Boyd Truman, a DoTERRA Wellness advocate, to create physical, emotional and spiritual journey within the body. Receive a SOC Essential Oil Healing Experience Session. Please Note: The SOC Essential Oil Experience Session is by appointment only. Message by 8pm the day prior to the event to reserve a time slot. To schedule your session please contact Joyce at (703) 395-5151. Symphony of the CellsTM is a holistic approach to bring harmony physically, emotionally, and spiritually within the body. The applications incorporate pure, therapeutic-grade essential oils and utilize a layering technique.