Computational Science and Engineering

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)

Come in and sit down at a table to play casual MtG Commander!

We will be participating in a trivia night event at 54 restaurant located at the Springfield Town Center mall on Monday. Trivia starts at 7 pm. Parking: There is free mall parking. There is also paid valet parking if you are feeling bougie. There's a maximum of 7 people per team, so please show up by 6:45 pm so that we organize accordingly. We may field multiple teams depending on turnout. Please plan on arriving and staying for the entire trivia event. To ensure you get a spot on a trivia team: * Please arrive by 6:45 PM, or notify the hosts that you are running late by 6:45 PM. If you arrive after 6:45 or don't notify the hosts, you are not guaranteed a spot on a trivia team and may need to form your own, separate team. * Please RSVP so we know to expect you. Don't be like Owen Wilson and Vince Vaughn from Wedding Crashers and crash a trivia event (i.e., don't show up without signing up on the attendee list). \-\-\-\-\-\-\-\-\- If you have Instagram, you can check out our account at asiandiningandadventuregroup for photos and announcements of group outings!

Reserve a spot on **[Eventbrite](https://www.eventbrite.com/e/1982624519308?aff=oddtdtcreator)** so we have an accurate guest count. We are absolutely thrilled to announce that **[Palette 22](https://www.palette22.com/)** is hosting Go Gay DC! Get ready for another gathering of members of the LGBTQ+ Community! About 30 LGBTQ+ folk are expected. Palette 22 offers modern street food spanning the globe served in a bustling art studio & gallery atmosphere. This event is ideal for making exciting new connections and community building. Or just to unwind and enjoy extended happy hour. **[See the happy hour menu](https://www.palette22.com/our-menus#happy)**. Arrive anytime that's convenient for you! Most attendees will likely arrive by 6:00 p.m. We will gather at the tables in the back of the bar. There is no pressure to order any food or drink; it is just optional. You're welcome regardless of where you live. Bring friends and meet new people. This is the place to be. This LGBTQ and Allies community-wide social provides everyone a chance to socialize, network, and share community spirit in an artsy setting. This event is being boosted by **[Go Gay DC](https://www.gogaydc.com/)**[,](https://www.gogaydc.com/) Metro Washington DC's inclusive LGBTQ+ community focused on friendship, leadership, and service. It reaches over 10K fabulous people and is growing fast. Visit [https://www.gogaydc.com](https://www.gogaydc.com/) At this exciting event, you'll even get to meet Go Gay DC's Founder **[TJ Flavell](http://www.tjflavell.com)**! Fabulous people from all over the world are expected. Name tags will be provided. It's FREE to attend; cash bar. There will be a bartender on duty; cash or credit card is fine. Casual attire is fine; this will be a relaxing and fun time. You are welcome regardless of where you live. Guests from DC, Maryland, and Virginia often attend. While there is no subway stop nearby, the local bus system is also very reliable and Shirlington is a very busy [transit hub](https://www.arlingtontransit.com/about/facilities/shirlington/). Use [Metro Trip Planner.](https://www.wmata.com/schedules/trip-planner/) Free garage parking is easy to find. Four of Shirlington’s garages share their parking so that the spaces available to office workers during the day are available for public parking on evenings and weekends. During the weekdays there are 879 public parking spaces and on evenings and weekends there are 2,446 public parking spaces. [See the map](https://www.arlingtonva.us/Government/Programs/Transportation/Parking/Public-Parking-Options/Shirlington-Parking). Invite your friends. This event is a safe, inclusive space for everyone under the rainbow. 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) Search keywords: LGBT LGBTQ LGBTQI LQBTQIA Lesbian Gay Bisexual Transgender Queer Intersex Straight Allies nonbinary non-binary

Reserve a spot on **[Eventbrite](https://www.eventbrite.com/e/1982624519308?aff=oddtdtcreator)** so we have an accurate guest count. We are absolutely thrilled to announce that **[Palette 22](https://www.palette22.com/)** is hosting Go Gay DC! Get ready for another gathering of members of the LGBTQ+ Community! About 30 LGBTQ+ folk are expected. Palette 22 offers modern street food spanning the globe served in a bustling art studio & gallery atmosphere. This event is ideal for making exciting new connections and community building. Or just to unwind and enjoy extended happy hour. **[See the happy hour menu](https://www.palette22.com/our-menus#happy)**. Arrive anytime that's convenient for you! Most attendees will likely arrive by 6:00 p.m. We will gather at the tables in the back of the bar. There is no pressure to order any food or drink; it is just optional. You're welcome regardless of where you live. Bring friends and meet new people. This is the place to be. This LGBTQ and Allies community-wide social provides everyone a chance to socialize, network, and share community spirit in an artsy setting. This event is being boosted by **[Go Gay DC](https://www.gogaydc.com/)**[,](https://www.gogaydc.com/) Metro Washington DC's inclusive LGBTQ+ community focused on friendship, leadership, and service. It reaches over 10K fabulous people and is growing fast. Visit [https://www.gogaydc.com](https://www.gogaydc.com/) At this exciting event, you'll even get to meet Go Gay DC's Founder **[TJ Flavell](http://www.tjflavell.com)**! Fabulous people from all over the world are expected. Name tags will be provided. It's FREE to attend; cash bar. There will be a bartender on duty; cash or credit card is fine. Casual attire is fine; this will be a relaxing and fun time. You are welcome regardless of where you live. Guests from DC, Maryland, and Virginia often attend. While there is no subway stop nearby, the local bus system is also very reliable and Shirlington is a very busy [transit hub](https://www.arlingtontransit.com/about/facilities/shirlington/ "https://www.arlingtontransit.com/about/facilities/shirlington/"). Use [Metro Trip Planner.](https://www.wmata.com/schedules/trip-planner/ "https://www.wmata.com/schedules/trip-planner/") Free garage parking is easy to find. Four of Shirlington’s garages share their parking so that the spaces available to office workers during the day are available for public parking on evenings and weekends. During the weekdays there are 879 public parking spaces and on evenings and weekends there are 2,446 public parking spaces. [See the map](https://www.arlingtonva.us/Government/Programs/Transportation/Parking/Public-Parking-Options/Shirlington-Parking "https://www.arlingtonva.us/Government/Programs/Transportation/Parking/Public-Parking-Options/Shirlington-Parking"). Invite your friends. This event is a safe, inclusive space for everyone under the rainbow. 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) Search keywords: LGBT LGBTQ LGBTQI LQBTQIA Lesbian Gay Bisexual Transgender Queer Intersex Straight Allies nonbinary non-binary

**REGISTER AT THE LUMA EVENT PAGE!!!** https://luma.com/27ja5gwl Join us for an exciting talk by Mary Gibbs, Senior Applied Scientist at Relativity. ​ ​**​Agenda:** ​​6:00 - 6:30 PM - Welcome and mingle 6:30- 6:45 PM - Introductions 6:45 - 7:30 PM - Talk 7:30 - 8:00 PM - Wrap up **​​Description:** ​If you have ever shipped a model, watched your metrics improve, and later learned from your users that something was wrong, the metrics were always wrong. You just didn’t know it yet. An evaluation consists of three components, a benchmark, a scorer, and a claim about what a score represents. Each component has its own weaknesses. Benchmarks can suffer from narrow coverage, contamination, or saturation. Scorers are often chosen for ease of automation or computation rather than for their alignment with user outcomes. And the claim connecting a score to reality is rarely made explicit. These gaps compound across the model development lifecycle. When metrics improve, teams treat that as a signal and optimize directly against it, which is how a measurement problem becomes a model problem. This talk maps where evaluations can go wrong, considers counterarguments, and ends with practical advice for building better ones. **​Speaker Bio:** ​Mary is a Senior Applied Scientist at Relativity, tackling data science challenges in the e-discovery and legal tech space. She is also an organizer for Women and Gender eXpansive Coders DC (formerly Women Who Code DC), fostering a community dedicated to empowering women and nonbinary individuals to excel in their careers. Mary's experience spans various domains. She has developed data science solutions related to job search and career progression at Teal, cybersecurity challenges at LiveAction Software, and commercial and government consulting at Mosaic Data Science. Before venturing into the field of data science, Mary conducted and published research pertaining to the cellular and molecular mechanisms underlying neurodevelopment at the National Institutes of Health. In other words, she has dissected and imaged a lot of fruit fly brains. She holds a M.S. in Data Science from The George Washington University and a B.A. in Biological Sciences from Cornell University

Join PSW Science® on May 29 at 8 PM as we welcome Michael Garrett (U. of Manchester) & Adam Thompson (NVIDIA). During the question and answer period, in-person attendees and live stream viewers may ask the speaker questions, and in-person attendees may also engage with the speaker during the post-lecture reception. Refreshments are served. For more information on this meeting, please visit: https://pswscience.org/meeting/2536 The meeting will be held in the John Wesley Powell Auditorium, adjacent to the Cosmos Club. The Powell Auditorium is located at 2170 Florida Avenue, NW Washington, DC 20008. Use of the Cosmos Club is restricted to the Powell Auditorium, the entryway to the auditorium, and the restrooms immediately outside the auditorium. Please note there is no onsite parking available. PSW Science, founded in 1871, is one of the oldest scientific societies in Washington D.C. Now, over 150 years later, we celebrate the Society's rich history and contributions to scientific discovery and cross-disciplinary collaboration. For information on how to become a member of PSW Science and membership benefits, please visit https://pswscience.org/join/

[Profs and Pints DC](https://www.profsandpints.com/washingtondc) presents: **“Artemis II and Beyond,”** on how the recent space mission fits into long-term plans for the Moon, with Michael J. Neufeld, retired senior curator for the Space History Department of the Smithsonian’s National Air and Space Museum. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/dc-artemis-ii-and-beyond](https://events.ticketleap.com/tickets/profsandpints/dc-artemis-ii-and-beyond) .] NASA’s recent, spectacular Artemis II mission is a sign that the United States is serious about sending humans to the Moon again. Gain an understanding of how Artemis II fits in both past and planned lunar missions with historian Michael Neufeld, who was lead curator of the Smithsonian’s Destination Moon exhibit. He has taught at Johns Hopkins, Colgate, and other universities, and is the author or editor of nine books dealing with the history of technology. He’ll start by looking at the aftermath of the Apollo program of a half century ago and why it ended only four years after its first lunar mission. He’ll consider why no lasting lunar programs emerged from major announcements by two presidents, George H.W. Bush and George W. Bush, that astronauts would be going back to the Moon and on to Mars. His vividly illustrated lecture will then explore how Artemis is a product of a human spaceflight program that has changed dramatically over the past 50 years. We’ll look at how collaboration with Europe, Canada and Japan became integral to the shuttle and International Space Station programs, and how the rise of new commercial space companies such as SpaceX has enabled NASA to buy both space services and space craft. Both international and commercial partners are involved in the latest Moon efforts, with SpaceX and Blue Origin expected to supply the landers to take astronauts down to a planned base on the Moon’s South Pole. How soon will any of this happen? Probably not as quickly as NASA says, but the specter of a Chinese landing on the Moon by 2030 is one obvious reason to keep things moving along. We’ll look at the sustainability of the Artemis space program for at least the next decade or so. You’ll emerge from the talk with no doubt that exciting days are ahead for space fans. (Doors: $17, or $15 with a student ID. Listed time is for doors. The talk starts 30 minutes later.) Image: The Artemis II mission launch (NASA photo).

[Profs and Pints Northern Virginia](https://www.profsandpints.com/washingtondc) presents: **“Artemis II and Beyond,”** on how the recent space mission fits into long-term plans for the Moon, with Michael J. Neufeld, retired senior curator for the Space History Department of the Smithsonian’s National Air and Space Museum. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/northern-virginia-artemis-ii-beyond](https://events.ticketleap.com/tickets/profsandpints/northern-virginia-artemis-ii-beyond) .] NASA’s recent, spectacular Artemis II mission is a sign that the United States is serious about sending humans to the Moon again. Gain an understanding of how Artemis II fits in both past and planned lunar missions with historian Michael Neufeld, who was lead curator of the Smithsonian’s Destination Moon exhibit. He has taught at Johns Hopkins, Colgate, and other universities, and is the author or editor of nine books dealing with the history of technology. He’ll start by looking at the aftermath of the Apollo program of a half century ago and why it ended only four years after its first lunar mission. He’ll consider why no lasting lunar programs emerged from major announcements by two presidents, George H.W. Bush and George W. Bush, that astronauts would be going back to the Moon and on to Mars. His vividly illustrated lecture will then explore how Artemis is a product of a human spaceflight program that has changed dramatically over the past 50 years. We’ll look at how collaboration with Europe, Canada and Japan became integral to the shuttle and International Space Station programs, and how the rise of new commercial space companies such as SpaceX has enabled NASA to buy both space services and space craft. Both international and commercial partners are involved in the latest Moon efforts, with SpaceX and Blue Origin expected to supply the landers to take astronauts down to a planned base on the Moon’s South Pole. How soon will any of this happen? Probably not as quickly as NASA says, but the specter of a Chinese landing on the Moon by 2030 is one obvious reason to keep things moving along. We’ll look at the sustainability of the Artemis space program for at least the next decade or so. You’ll emerge from the talk with no doubt that exciting days are ahead for space fans. (Doors: $17, or $15 with a student ID. Listed time is for doors. The talk starts 30 minutes later.) Image: The Artemis II mission launch (NASA photo).

\-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LUMA)!](https://luma.com/be8kjf6n) \-\-\-\-\-\- 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](https://luma.com/civic-tech-dc)! **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](https://luma.com/civic-tech-dc) 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/be8kjf6n) \-\-\-\-\-\-

• What we'll do On https://blackecon101.podbean.com/ Thursdays at 6 pm. discussing the economy....

**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** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** TBD

Most people use AI like a search box: they type one sentence, hope for the best, and get frustrated when the answer is generic, wrong, or useless. But getting better results from tools like ChatGPT, Claude, Gemini, and other AI systems is not about memorizing magic prompts. It is about learning how to give the AI better context. In this beginner-friendly session, we’ll break down how to make AI dramatically more useful by improving the way you communicate with it. You’ll learn how to give clearer instructions, provide examples, set constraints, ask for better output formats, and use follow-up questions to turn a mediocre answer into a genuinely useful one. We’ll cover practical techniques you can use immediately for work, learning, writing, coding, planning, research, and everyday problem solving. We’ll also touch on why these same ideas show up in more advanced AI systems, including RAG, agents, evaluations, and AI workflows. No technical background required. Bring your curiosity, your questions, and maybe one real task you wish AI was better at helping you with. **What you’ll learn:** * Why “better prompting” is really about better context * How to structure requests so AI gives more useful answers * How to use examples, constraints, and output formats * How to iterate when the first answer is not good enough * How these skills connect to more advanced AI workflows This meetup is for anyone who wants to move beyond basic ChatGPT usage and start getting more practical value out of AI. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.

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\.

PLEASE NOTE!!! This event will be In-Person for our very 1st Improving collab! If you know the [Columbus Unity group](https://www.meetup.com/columbus-unity-user-group/) location, we'll be at the same place. This is our 1st event and are doing a soft launch with limited attendance. 1st come 1st serve. If you want to be there and we fill up, please email me at [info@thecogg.com](mailto:info@thecogg.com) and I'll be in touch. All street parking is free on Sundays but you can also pay to park in any of the local garages. See image of [parking map here](https://drive.google.com/file/d/1Mr9_LFIggbs-0_Zd3AJTGNqEhgMf2TzQ/view?usp=sharing). \-\-\- On the last Sunday of the month, we're having our usual end-of-the-month social gathering with our GameDev Meetup meeting. There will be announcements and presentations followed by some social networking Let's continue the conversations with good vibes and friends. All are welcomed from all ages and backgrounds to this public event. If we can, we'll be streaming or uploading the video later via our COGG YouTube channel here: [https://www.youtube.com/@TheCOGG/streams](https://www.youtube.com/@TheCOGG/streams) (Also please do subscribe if you have not done so!) No game development experience required! If you are interested in doing a 20 minute game development related presentation, please fill out our form online here: [https://goo.gl/forms/lVdTJZiNJewlPJuj1](https://goo.gl/forms/lVdTJZiNJewlPJuj1) Or e-mail us at info@thecogg.com with the following: Your Name, Company/Affiliation, Name of Your Game/Topic, Description, Tech Needs, and Your Contact. Be sure to check out our Discord for real time news updates: [https://discord.gg/NrBhuNQ](https://discord.gg/NrBhuNQ)

Christians in Tech is a community at the intersection of faith and technology. Our meetups are designed to spark meaningful conversations, promote knowledge sharing, and encourage growth—both in your career and your spiritual walk with God. Whether you're an experienced professional or just starting your tech journey, CIT welcomes you. Our Website [https://linktr.ee/citcbus](https://linktr.ee/citcbus) Sponsors and Partners * Improving (Venue Sponsor) * Bethel World Prayer Center (Fiscal Sponsor) * Fruits & Roots (Coffee Partner)

**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

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.