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)

**Rockville Science Center Chess Night and Lessons by FIDE Master Luke** **Time/Date: Monday evening, 6:30 to 9:00 PM** Join us as FIDE Master Luke delivers a chess lecture with notes. He begins teaching at 7:15pm. **Location: RSC "Storefront" Location,** 36C, Maryland Avenue, Rockville, MD 20850 **Parking:** First two hours free at Parking Garage "A", 20 Maryland Ave #450, Rockville, MD 20850 * Casual Chess - Everyone is welcome. * You do not have to know how to play chess(!!!!) * Chess sets available on a first come - basis. * Wonderful chess sets provided, BYOC (bring your own clock) Host: Howard Lichtman More information about the RSC is at https://www.rockvillesciencecenter.org/

[Profs and Pints DC](https://www.profsandpints.com/washingtondc) presents: **“Terrors of Irish Fairylore,”** an introduction to Ireland’s strange and unsettling folkloric “Good People,” with Brittany Warman, former instructor at Ohio State University, co-founder of The Carterhaugh School of Folklore and the Fantastic, and co-author of the new book *Fairylore: A Compendium of the Fae Folk.* [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/dc-terrors-of-irish-fairlylore2](https://events.ticketleap.com/tickets/profsandpints/dc-terrors-of-irish-fairlylore2) .] Today it is common to think of fairies as small, childlike, sparkly creatures with glittering wings and dresses made from flower petals. But the fae of traditional Irish folklore were no such things. Amoral, capricious, even malicious when they chose to be, the too-frequently forgotten fairies of times long past would, more often than not, haunt nightmares. Join Brittany Warman, a folklorist who has earned a devoted following among Profs and Pints fans, as she explores the darker side of Irish fairylore. The figures she'll discuss include: The Leanan-Sidhe, a vampiric fairy who gives artistic inspiration in exchange for your mortal spirit. The Dullahan, a fairy with a human spine for a whip and a habit of hurtling across fields in a death coach made from human skin. The Banshee, a mournful fairy whose cry signals a death in the family to which she's attached herself. Dr. Warman also will examine the surprising impact of fairy folklore on two classics of Irish Gothic literature, Oscar Wilde's *The Picture of Dorian Gray* and Bram Stoker's *Dracula.* It’s a talk that will remind you that the relationship between the Irish and the spooky stretches well beyond Halloween. (Doors: $17, or $15 with a student ID. Listed time is for doors. Talk starts 30 minutes later.) Image: “The Banshee Appears,” an 1862 illustration by Robert Prowse (Wicklow Heritage / Public domain).

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

**Please Note:** This game has limited slots, and you must RSVP. If the event is full, please signup for the Waitlist, and you will be moved up as people update their RSVPs. Clank! In! Space! is built on the same game system as Clank!: A Deck-Building Adventure, with players building a personal deck of cards throughout the course of the game, with the cards allowing them to move through the spaceship, attack things, acquire new cards, and — oh yeah — make noise to attract Lord Eradikus and potentially seal their own doom. Light Refreshments are provided. Please RSVP so we can account for Snacks.

Who do you admire, and why? This discussion explores the idea of idols from every angle: the people we look up to, what draws us to them, and whether that instinct serves or limits us. Are idols a source of inspiration, or do they set us up for disappointment? Come ready to share your perspective, challenge assumptions, and unpack what it really means to put someone or something on a pedestal. **ATTENDANCE POLICY:** To keep this group running smoothly and ensure that spots are available for those who genuinely want to attend, please RSVP only if you are confident you can make it. If you RSVP “Yes” and do not attend without updating your RSVP in advance, you may be restricted from attending future events for a period of time. We understand that things come up. If you can no longer attend, simply update your RSVP as soon as possible so your spot can be offered to someone on the waitlist. Repeated no-shows will result in removal from the group. Thank you for respecting everyone’s time and helping us maintain a reliable and engaged community. **SUPPORT THINKERS AND DRINKERS:** Thinkers and Drinkers International is a registered 501(c)7 nonprofit organization. We work hard to create an organization that adds value to our communities while keeping membership free for all. If you find value in what we’re doing, please consider donating through Patreon: [https://www.patreon.com/thinkers](https://www.patreon.com/thinkers) **CONNECT:** Instagram: @ThinkersDrinkersInternational Facebook: [https://www.facebook.com/thinkersdrinkersinternational/](https://www.facebook.com/thinkersdrinkersinternational/) Podcast: [https://www.spreaker.com/user/thinkersdrinkersinternational](https://www.spreaker.com/user/thinkersdrinkersinternational) Email: [[[ThinkersDrinkersInternational@gmail.com](mailto:ThinkersDrinkersInternational@gmail.com)]

💃 Beginner-Friendly Dance Fitness Get ready to move, sweat, and have fun! This high-energy class blends Brazilian Carnival vibes with global street dance for a full-body workout that doesn’t feel like one. ✨ No experience needed ✨ No partner required ✨ Just come ready to move and enjoy the music Expect a fun, welcoming environment where you can let go, build confidence, and leave feeling amazing. 📍 Location: The Dance Xperience (McLean) – 3 Floor ⏰ Please arrive 5–10 minutes early 💵 Drop-in: $10 (pay at the door or message for details) 🔗 More info + schedule: https://fitnesswithmikissz.com/connect-with-miki Let’s sweat, dance, and make it a vibe 🔥

🗒️ **Details** Grafana 13 just dropped at GrafanaCON 2026 and we're not wasting any time. Join us at [Clare & Don's Beach Shack](https://clareanddons.com/) in Falls Church, VA for a free hands-on 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 — Food & Introductions** Come hungry. We're at Clare & Don's, so you already know the vibes are good. Grab a bite, meet the people around you, and get settled in before the talks kick off. 🎙️ **6:00 – 6:30 — Tech Talk: Grafana 13 & AI in Observability** Grafana Assistant is now built into the platform and it changes a lot. We're breaking down what's new in Grafana 13, how AI is reshaping the way teams monitor and troubleshoot, and what this looks like in practice. Expect real talk from Grafana Labs engineers, not a sales pitch. **Speakers:** Rob Santos, Senior Solutions Engineer @ Grafana Labs Vishal Nakra, Senior Manager, Solutions Engineering @ Grafana Labs 💬 **6:30 — Networking & Open Q&A** Bring your questions, your war stories, and your opinions. This is the part where the good conversations happen. 🎁 **Don't forget** — we're doing a Grafana swag raffle on the way out. 🔚 **7:30 — Wrap Up** *** **Spots are free but limited — grab yours before they're gone.** We look forward to seeing you there! Speaker info and talk abstracts: Rob Santos, Senior Solutions Engineer @ Grafana Labs

# 🤖 **Build With Me #2:** Build Your Personal AI Machine, Live 🗓 Wednesday \| 6–8 PM 📍 Venue: AWS Skills Center You’ve seen it in action… Now you want one for yourself! In this session, we’ll set up your own AI system capable of building and developing anything you can think up. *** ## ⚡ What You’ll See * Setting up your own AI system in real time to think, build, and operate any product or business * Connecting AWS, ChatGPT, OpenClaw, and Telegram into one working system * Using your phone or computer to develop ideas, research questions, discuss specs, and ship real products *** ## 🧠 What You’ll Learn * We’ll create your own personal AI assistant live together * How AI can help you keep building websites, app ideas, business tools, and other projects from anywhere *** ## 🧰 Tools We’ll Explore * OpenClaw * AWS * ChatGPT * Telegram *** ## 🎯 Who This Is For * Beginners to advanced who want a practical AI setup they can use right away for any idea * People with business ideas, app ideas, or side projects they want help moving forward * Anyone who attended Session 1 *** # What to Bring * Your laptop so we can set up the tools. \*You do not need to know AWS or the other tools before coming. \*Anyone can join even if you missed session 1. One setup. The most powerful digital machine ever known, in your pocket..

[Profs and Pints Northern Virginia](https://www.profsandpints.com/washingtondc) presents: **“How AI Alters Thinking,”** on dealing with artificial intelligence’s capacity to change and undermine our thought processes, with Eli Alshanetsky, assistant professor of philosophy at Temple University, principal investigator at its Cognitive Integrity Lab, and author of an upcoming book on AI and freedom of thought. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/nv-how-ai-alters](https://events.ticketleap.com/tickets/profsandpints/nv-how-ai-alters) .] Doctors who give bad advice can be sued for malpractice. Teachers belong to a profession with set standards. When artificial intelligence guides you, however, that guidance comes with a disclaimer: Use at your own risk. Every day millions of people take that risk, and usually AI seems genuinely helpful. But even if AI gives us good answers, might its use over time do bad things to how we think? Explore the relationship between AI and our own minds with Eli Alshanetsky, whose Cognitive Integrity Lab studies how artificial intelligence changes how we think, learn, and build trust. Author of *Articulating a Thought* and the upcoming book F*reedom of Thought in the Age of AI*, he’s on the cutting edge of efforts to answer AI-related questions such as: How can we tell when work is truly our own? How can technology support rather than replace authorship and reflection? What does trust mean when AI mediates our relationships with others and with our own thoughts? To set up his discussion of potential consequences of AI, he’ll describe how social media’s impact on society serves as a preview. Social media didn’t just give people what they wanted to click on, it actually changed what they regarded as click-worthy. It broke attention spans and fueled radicalization across millions of very different people. It left us with people who doom-scroll for hours, who can’t focus, who don’t know what to trust anymore. If you’d shown people this version of themselves ten years ago, would they have chosen it? Artificial intelligence is making a similar deal with us, but the stakes are higher. It isn’t chasing clicks. It’s optimized for giving you the most satisfying response to whatever is on your mind right now. The risk over time isn’t just that you’ll get lazy. More profoundly, even when you think hard, your sense of what counts as good thinking—as well as what sounds like you—will shift to match what AI has been feeding you. We’ll consider what kind of person this produces and whether this is someone we want to be or want children to become. Professor Alshanetsky will lay out a practical framework, which he calls “the interaction layer,” for using AI without letting it replace the thinking it’s supposed to support. He’ll also talk about what AI-related concerns should be the focus of parents and educators. (Doors: $17, or $15 with a student ID. Listed time is for doors. Talk starts 30 minutes later.) Image: Illustration by David S. Soriano / Creative Commons.

Join us for our May happy hour! For those that don't drink, the bar has mocktails and sodas. **Getting there:** * Punchbowl is on the end of the building, **across from South Block** We plan to be on the first floor bar, right when you walk in. * **Metro:** PB is a block and a half away from the Ballston Metro stop * **Parking:** there is street parking and the mall also offers really cheap parking. $1 an hour for the first three hours.

Join us for a deep-dive with the team at **[Granica](https://www.granica.ai/)**[ ](https://www.granica.ai/)as they walk through the architecture they've built to tackle Data Lakes at enterprise scale: a unified maintenance suite covering vacuum, partition expiration, and right-to-erasure across all five major table formats. Expect real deletion semantics by format, common migration footguns, and the safety layer — retention floors, deferred recovery, multi-schedule, S3 Inventory — that makes cleanup safe at petabyte scale. Tarang and Tom will walk us through the architecture, share the deletion semantics that differ by format, call out the migration footguns teams consistently hit (shared-path tables, deletion vectors silently breaking VACUUM), and explain the safety layer — retention floors, deferred recovery, multi-schedule, and S3 Inventory integration — that makes it possible to run aggressive cleanup at petabyte scale without losing sleep. What you'll take away * Deletion semantics across Hive, Delta, Iceberg, and beyond * Common migration footguns — shared-path tables, deletion vectors breaking VACUUM * How to make GDPR right-to-erasure auditable at scale * Safety patterns: retention floors, deferred recovery, S3 Inventory integration **Speakers:** **Tarang Vaish — Co-founder & CTO, Granica** Tarang built production AI email security at Armorblox (acquired by Cisco), scaled distributed data at Cohesity, and worked on GPU development at AMD — giving him a full-stack view from silicon to SaaS. Granica now runs in production at some of the world's largest SaaS companies, managing 100+ PB of customer data. M.S. Computer Science, Stanford. **Tom Molloy -- Director of Enterprise, Grancia —** Tom was one of Snowflake's earliest sales hires and spent nearly a decade growing the platform from pre-beta to enterprise ubiquity. He later led go-to-market at dbt Labs and theom, working with large organizations on data governance, transformation, and security at scale.

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.

Customer identity resolution becomes increasingly complex as organizations scale across multiple systems, regions, and data formats. Traditional rule-based approaches often fail to keep up with data variability, require constant manual tuning, and struggle with real-time processing needs. This session presents a practical approach to building a scalable identity resolution pipeline using AWS services and modern AI techniques. The architecture combines data ingestion through Amazon S3 and AWS Glue, transformation pipelines using Spark on EMR, and machine learning models deployed via SageMaker for entity matching and standardization. Graph-based relationship modeling is implemented using Amazon Neptune to improve resolution accuracy by incorporating household and shared attribute context. We will walk through how machine learning models can be used for name and address normalization, how intelligent blocking strategies improve matching efficiency, and how feedback loops can be introduced to continuously improve accuracy. The session also highlights how serverless components such as AWS Lambda can be used for orchestration and real-time processing. **SPEAKER BIO** Mosaic Syed is a Senior Data Engineering and Cloud Solutions Architect with over 20 years of experience designing and delivering scalable, secure, and high-performance data solutions across global enterprise environments. https://www.linkedin.com/in/mosaic-basha-syed-92300856 **CALL FOR SPEAKERS** Learn more: [https://www.awscolumbus.com/get-involved/](https://www.awscolumbus.com/get-involved/) **THANK YOU** *VEEAM* for hosting our meetup! To learn more about *Veeam*, please visit their website: [https://www.veeam.com/](https://www.veeam.com/) **DIRECTIONS** 8800 Lyra Dr #450 · Columbus, OH go to 4th floor. **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

Join us for a practical, beginner-friendly guide to choosing the right large language model. We’ll compare major models like ChatGPT, Claude, Gemini, and Llama, talk about when to use hosted APIs versus local models, and break down the tradeoffs around cost, speed, quality, privacy, context windows, coding ability, and reliability. You’ll leave with a clearer mental model for picking an LLM based on your actual use case instead of hype, benchmarks, or brand names. No deep AI background required. 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.

**Total Eclipse of the Chart: School Redistricting Dashboards** In this presentation, we will explore the utilization of maps, sets, and SQL within a Tableau dashboard to help provide “what-if” analyses generated through the use of a mapped dashboard, providing different scenarios and the potential implications of these. While in this use case we are focused on a large school district, the concepts of utilizing existing data to explore the future impacts of modifying different geographic boundaries can be useful to many industries, balancing the mix of maps with visual analytics. **About Our Speaker** Robert Kramer is the Data Systems and State Reporting Coordinator at South Western City Schools in Grove City. He has worked there for 17 years, serving previously in the roles of Data Analyst, Programmer, and Operations Coordinator. Prior to working at South Western, he worked as a Systems Engineer at Pinnacle Data Systems in Groveport. He graduated in 2005 from The University of Toledo with his Bachelor’s in Computer Science and Engineering, and a minor in Mathematics. Robert resides in Obetz with his wife, and their 15 and 12 year-old daughters. He was also just elected to his 3rd four-year term on the Obetz City Council. Thanks to our 2026 sponsors: [Clarivoy](https://www.clarivoy.com), [What Box Consulting Group](https://www.whatboxconsultinggroup.com), [Conductrics](https://www.conductrics.com), and [Piwik PRO](https://piwik.pro) More info at [cbusdaw.com](https://cbusdaw.com)

Join the Columbus AI community for our quarterly gathering — a casual, community-focused evening where everyone has a chance to share, learn, and connect. These open mic–style events give anyone in the community up to **5 minutes** to present a project, share a tool, pose a question, or offer a perspective on the evolving AI space. No slides required — just a welcoming space to exchange ideas and keep the local AI conversation moving. If you’d like to take the stage, message \*\*Chris (the organizer)\*\*with a **title and short description** of what you’d like to share. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.linkedin.com/company/transformlabs/) Sign up also accessible via [Transform Labs Luma](https://luma.com/transformlabshq)

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**

**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** TBD **YouTube Link** TBD

**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). Topic: This month John Lairson will share a notebook describing the Alpaca (Paper) Trading API and discuss different algorithms for evaluating stock trades. 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 Central OH Python at centralohpython@gmail.com