Information Retrieval

Valentine's Day might be in the past, but Plato's classic discussion of love and desire, the *Symposium*, is eternal. Join us on April 4 to discuss this famous work, which features Socrates, Alcibiades, and other important Greek figures at a drinking party where things quickly turn philosophical. Feel free to bring whichever translation you prefer. As usual, we will meet in the Martin Luther King Jr. Memorial Library in the **205-B Accessibility Room**, located on the second floor. Ask at the Center for Accessibility front desk if you are looking for us. See you there!

A beginner-friendly workshop on advanced AI, government policy, and how this new technology is evolving and impacting society. ​​​​**Free and open to the public — no technical background required** ​​​​In previous workshops, we've seen how AI is a transformative technology like no other, for better or for worse. Beyond the technology itself, however, government regulations and societal norms will inform the impact AI has on our world. ​In this workshop, we will explore what policies have been proposed, which have been implemented and why, and what the impact has been so far. How can we use these lessons to maximize the promise and minimize the peril of AI? ​​​​**Over the course of the workshop, we’ll explore:** * ​**Concepts and Goals:** What problems should AI policies be trying to solve? * ​​​​**Different Kinds of AI Policies:** What policies have been proposed so far? What are the pros and cons? * ​​​​**Political Landscape:** How are financial incentives and conflicting ideologies influencing AI policy? * ​​​​**Case Studies:** What can we learn from what's been passed so far? ​​​​**What you’ll get:** * ​​​​A clear, non-technical introduction to core ideas from AI safety, AI governance, and existential risk research. * ​​​​Small-group discussions and thought experiments that connect AI risks to everyday life, institutions, and incentives. * ​​​​A better mental model for evaluating headlines, hype, and claims about AI progress. ​​​​**Format & vibe:** ​​​​This is not a lecture it is an interactive workshop designed to help people think clearly about a topic that is increasingly important and moving very quickly. ​​​​Whether you’re new to AI, casually interested, or deeply unsure what to believe, you’ll leave with a clearer picture of *why* many researchers take AI seriously—and *what’s actually at stake* if we get it wrong.

UPDATE - changed from Sunday to Saturday due to weather. Please update RSVPs. Let's explore the stunning vistas of Strickler Knob and Duncan Knob in Virginia's Massanutten Mountains. ## Trail Facts * **Difficulty Level: Strenuous** * **Meeting Location**: Vienna Metro Station​ South * **Meeting Time**: 9:00 AM​ * **Driving Time**: Approximately 2 hours each way​ * **Length:** 9.7 Miles * **Elevation Gain:** 2,152 Feet * **Dogs:** Allowed (with caution - the scramble is not recommended for dogs) * **Trailhead Coordinates:** 38.708202, -78.561530 * **AllTrails Map**: https://www.alltrails.com/trail/us/virginia/strickler-knob-and-duncan-knob-loop **CARPOOL:** If you need a ride or can offer one, please coordinate in the event comments. Be a friend to the environment, save money, and make friends. This trail in the Massanutten Mountains is renowned for its challenging routes and breathtaking panoramic views. The trail features well-marked paths with modest climbs. The highlights of this hike are the out-and-back scrambles to Duncan Knob and Strickler Knob, both offering spectacular views. ​I expect this hike to be moderate, but caution that it can be strenous. **Trail Details:** We will meet at The Vienna Metro station on **Saturday** morning at 9am and drive the trailhead. The drive is about 2 hours. Upon arrival, we'll head towards Duncan Knob and make a short out-and-back hike/scramble to enjoy the view. Afterward, we'll proceed along the trail towards Strickler Knob. The out-and-back hike to Strickler Knob offers 360-degree views of the surrounding area. After returning to the junction, we'll then finish the loop, first descending and then climbing back to the parking area.​ I plan to stop at 2 Silos Brewing Co in Manassas on the way home - address is 9925 Discovery Blvd, Manassas, VA 20109. *Note: Be prepared for varying temperatures; layering is key.* **LIABILITY NOTICE:** Please remember that this group operates under the common adventurer model. We are a group of friends and volunteers organizing trips for fun and shared experience. Participants are expected to be familiar with best hiking practices and choose hikes that align with their physical abilities and experience. Organizers and members are not liable for any injuries, loss, or damage to persons or property arising from group activities. By attending this event, you agree to assume all risks associated with the activity.​ For more information on the common adventurer model, please see [Ron Watters' definition](https://www.ronwatters.com/CADefine.htm).​ If you believe you may be lost during the hike, follow the advice of the [US Forest Service](https://www.fs.usda.gov/visit/know-before-you-go/if-you-get-lost).​ See you on the trail!

**PLEASE do not RSVP on Meetup - only posting here so more people can learn about upcoming events** We are excited to host the next **pairs** speed puzzling competition on **Saturday, April 4th**! No experience is needed, and all ages are welcome. **Please note**: Registration is required, RSVPing on Meetup does not reserve your spot! Please sign up at: [https://forms.gle/peLLLJdaEbeTfhNf7](https://forms.gle/peLLLJdaEbeTfhNf7) **Date**: April 4th, 2026 **Time**: 11am (please try to arrive 5 minutes early!) **Address**: Westover Branch Library Longfellow Meeting Room (1644 McKinley Rd #3, Arlington, VA 22205) **Price**: $40 per pair **Notes**: * Teams will get to keep the competition puzzle, and prizes will be given for the winning team! * There is parking near the library, as well as a Metro stop very close * There is no time limit, but the event will end at 1:00pm

The District Language Exchange meets every Sunday evening around central DC or Arlington. Come practice Spanish, French, Portuguese, Chinese, Arabic, and more! This Sunday April 5th, we will be meeting at Dacha Beer Garden in Shaw from 4-7pm. Dacha is a 21+ bar, so please be sure to bring ID. Check us out on social media to find out where the week's exchange will be! Facebook: https://www.facebook.com/groups/districtlanguageexchange Instagram: https://www.instagram.com/dclangx/

Title: Beyond Cryptography: Geometric Symmetry & Parity Stability Summary: Decoding Chaos: Using Quantum-Inspired Symmetry Metrics to Detect Stealth Attacks in High-Stakes Infrastructure. Agenda: Why symmetry matters after the proof is done. Symmetry as an Invariant Symmetry as a Security Primitive Trust as a Continuous Function Live Thought Experiment Engineering, Implications & Open Questions Move away from traditional bit-matching and discuss "Symmetry Drift." Explain how system states can be modeled as high-dimensional manifolds where an attack represents a geometric deformation.T(t)=f(symmetry stability,parity consistency,temporal coherence) Speaker: Vijay Krishna Vijay is a security engineer focused on runtime observability and symmetry drift in cryptographic systems. He is the founder of Vyapti Resonance and the creator of the Quantum Security Probe (QSP), a telemetry-driven integrity monitoring framework for post-quantum infrastructures. His work bridges theory, engineering, and long-lived system behavior, emphasizing measurable trust over binary verification. Vijay has 9 accredited licenses in Quantum Computing. Career Snapshot: Microsoft → DuPont → Rockefeller Capital Management → Morgan Stanley → New York Life → Founder, Vyapti Resonance Across this trajectory, Vijay has operated at the core infrastructure layer of organizations—cloud platforms, identity systems, distributed compute, reliability engineering, and governance frameworks. His work has consistently involved systems that cannot fail, particularly in regulated financial and insurance environments. This enterprise grounding strongly informs his academic and research outlook: quantum and AI systems must be operable, governable, auditable, and teachable, not merely theoretically elegant.

Let's visit my favorite Balkan/German restaurant in Old T. In my humble opinion, they have the best schnitzel in this area! They may have a special Easter menu. If there's interest, we could go to a movie afterwards. [MENU | old-house-cosmo](https://www.oldhousecosmopolitan.com/menu-2)

New (old) location - La Madeleine at 500 King St! Hope to see you there

Goal Focus & Flow is a casual, women only event created for deep focus, intentional progress, and genuine connection. Bring whatever you’re currently working on, studying, planning, writing, researching, job searching, creative projects, or personal goals and spend focused time working independently while surrounded by other women doing the same. The energy is calm, supportive, and rooted in mutual growth. At the end of the session, we’ll do a brief, optional share where participants can talk about what they worked on and what they learned. Sharing insights helps reinforce learning, spark ideas for others, and turn individual progress into collective knowledge. This space is intentionally designed to help women: Stay accountable to their goals ✅ Learn from one another in an organic, low-pressure way Retain what they’re working on by reflecting and sharing ‍♀️ Build friendships while growing side by side The shared focus and reflection create a natural sense of connection, allowing friendships to form through growth rather than small talk. Location note: For women’s safety and comfort, the venue will not be shared publicly. The exact location will be shared privately in the group chat with confirmed attendees. Join the group chat here: https://chat.whatsapp.com/H533SlZi8h70XjkN6iSEws Come as you are. Work at your own pace. Leave with clarity, momentum, and the feeling that you’re not growing alone.

🎉 **Puzzle Palooza: PUZZLES OF ALL KINDS WELCOME at the Board Room! 🧩** Join us for **Puzzle Palooza** in our puzzle swap series! Whether you're into jigsaw puzzles, crossword puzzles, sudoku, logic puzzles, or brain teasers, this event is for you. Bring any type of puzzle—whether it’s a challenging 1000-piece jigsaw, a captivating 3D puzzle, a fun puzzle book, or a unique brain-bending game—and swap it with fellow puzzle lovers. Let’s share the joy of solving and discover new puzzles to enjoy! 📅 **Date:** Sunday April 5, 2026 🕒 **Time:** 3:00 PM 📍 **Location:** [Board Room DC](https://boardroomdc.com/), 1737 Connecticut Avenue NW, WDC 20009, in the mezzanine. **Event Highlights:** 🌐 **Networking:** Connect with fellow puzzle enthusiasts over a game and some delicious drinks. It's a perfect blend of puzzles, games, and great company. 🧩 **Puzzle Swap Extravaganza:** Immerse yourself in a sea of puzzles as we transform the Board Room into a Puzzle Paradise. Bring your puzzles to trade, and discover hidden gems for your collection. 🎲 **Board Game Delights:** Enjoy the fantastic selection of board games available at the Board Room. Take a break from puzzles and explore a world of strategic challenges and social fun. **Agenda:** * 3:00 pm - 3:30 pm - check in and chat! * 3:30 pm - 4:00 pm - introductions and swap * 4:00 pm - 5:00 pm - social puzzling **How to Join:** 1. **Save the Date:** This is your ticket to Puzzle Paradise. Mark your calendar and get ready for an afternoon of puzzling delight. 2. **Location:** Board Room DC, known for its vibrant atmosphere and extensive game collection. [1737 Connecticut Avenue NW, WDC 20009](https://boardroomdc.com/) 3. **Spread the Word:** Invite your friends and fellow puzzle lovers. Let's make this Puzzle Paradise an unforgettable experience! \*\*\*Please note that if your puzzle is not swapped, you are still responsible for taking it home. **This is not a swap where you will be able to drop off puzzles and leave**\*\*\* For all of our Swap Series, please prioritize community safety. Ensure you're vaccinated before joining us. Your commitment creates a secure space for our shared love of cooking and good times. See you responsibly at the meetup!

Pay attention! We’re delaying a week for those of you who may be on Spring break and/or celebrating the holiday. Ok, no pancakes, but waffles-a-plenty. Join the local UX and Digital Design community for a casual monthly breakfast. Look for us upstairs!

The Fellowship of the Star Schema: Transforming OLTP Data for Power BI One does not simply build reports on OLTP data. Join us on an epic journey from the depths of raw, normalized tables to the shining halls of a well-modeled star schema fit for Power BI greatness. We will demystify the differences between OLTP and OLAP, walk through star schema vs snowflake (and why Power BI has a clear favorite), and show you the compression differences between normalized and columnar storage that will make you never look at an OLTP model the same way again. We will cover the different types of dimensions, when to use them, and how to handle Slowly Changing Dimensions without losing your mind. You will leave knowing exactly how to identify a bad model, how to convert OLTP data into a clean star schema, and how to forge relationships that rule them all. Whether you are a data wizard, a curious hobbit, or somewhere in between, your models will never be the same.

AI is changing how art is made. But when does it stop being your work and start being the machine’s? This month we're going to be doing a panel with with digital image, music, and written word artists, talking about at what point, while using AI in the creation process, does the work become not the artist creation? We encourage audience participation during this event that will be moderated by Chris Slee. 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.transformlabs.com/services)

We're bringing the community together for a casual happy hour with ServiceNow-themed trivia, food and drinks, and great conversation. Details coming soon - for now, save the date and plan to join us for connection and fun.

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 **WiFi HaLow: Introduction and Practical Use** with **Alex Barbur**. Details are are [core.radio](https://core.radio).

Let’s try this popular Italian restaurant in Reynoldsburg. This is the menu: https://scaliristorante.com/#4e468054-0235-43e2-81c2-44e061341e9e

**The Data-Driven Brand: Using Analytics to Shape Perception** Can you use analytics to improve tacos? This being CBUSDAW, we think the answer is probably “yes”, but we’re not sure how to implement or test this theory. For our April meetup we’ve got Sara Kear, CMO of Condado Tacos, to investigate this delicious question. Sara will explore how she blends quantitative data and qualitative customer feedback to shape brand positioning and drive business decisions. We all know that marketing and analytics go way beyond attribution. Sara will show how Condado uses customer insights to inform product and pricing strategy. She’ll also highlight how Condado leverages customer feedback at scale to influence operational priorities, positioning marketing as the voice of the customer across the organization. In the last 12 years Condado has gone from one location in Columbus to 52 locations across 10 states, so we’re guessing there’s more to that growth than really good guac (though the guac probably helps). Ultimately, this talk focuses on the intersection of art and science—using data to inform creativity and build a brand that resonates with customers in a measurable way. **About Our Speaker** Sara Kear is Chief Marketing Officer at Condado Tacos, where she oversees brand, restaurant design, menu and pricing strategy, off-premise including catering, and customer data strategy. Since joining in 2021, she has helped grow the brand from 19 to 52 locations while building a data-driven marketing organization focused on loyalty and customer insights. Condado has since been named to the Inc. 5000, recognized as Breakout Retailer by Chain Store Age, and consistently ranked among FastCasual’s Top 100 Movers & Shakers. 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)