Information Retrieval

***Meet us in the Rockville Library, Collaboration room #4 where we will attempt to run clean scans of gold samples, and then clean up that data with post processing.*** This is a high sensitivity experiment, and we do not plan on being successful so early. But we've had promising results lately - so we will be putting in the time. Online join link is: - [https://meet.jit.si/mocomakers](https://meet.jit.si/mocomakers) Our community is building (and documenting for other teams) how to build a scanning tunneling microscope using a mix of common and 3D printed parts. This will allow us to scan and visualize a single atom - an ambitious we are doing over the course of a few months. The MoCo Makers community is one of the most innovative and competent groups in Maryland, and we've done everything from [publishing cancer research](https://pubmed.ncbi.nlm.nih.gov/38136356/), to [launching products](https://www.kickstarter.com/projects/gotim/cozy-curvy-multi-contour-pillow), [winning grants](https://covidinfocommons.datascience.columbia.edu/awards/2014255), and inspiring thousands. Now our biggest challenge yet has appeared. We are building a Scanning Tunneling Microscope, that will allow us to scan and visualize single atoms. To get a better idea of what we are doing, see our reference project here: [https://www.youtube.com/watch?v=7N3OqTEq08g](https://www.youtube.com/watch?v=7N3OqTEq08g) All starting CAD, code, and reference files should exist. However, let's be the first Maker community to document the build process and share it with learners around the world. We will be publishing our work here -[ https://hackaday.io/project/202816-qt-panda](https://hackaday.io/project/202816-qt-panda) Meet us in the Rockville Library, Collaboration room #4

Join DC Metro Crafts for our first Thursday meetup. Bring your own cross stitch, knitting, crochet, or other portable craft. The Southwest Library is right off the Waterfront Metro. We're upstairs in Conference Room 1 (not 2). Note: The RSVP limit for this is 8 people. It's a small room and all that was available. Please make sure to rsvp if you're coming.

UXDX, Refresh DC, Friends of Figma, and User Experience University are joining forces for a night of good drinks, great convos, and even better connections. Whether you're a UX designer, researcher, product manager, or engineer, if you work in the product space, this night is for you. Come connect with the people shaping DC's design and tech scene. What to expect: — Network with DC's UX, product, and engineering community — A chance to WIN a free ticket to UXDX during our giveaway — Score 25% off tickets to UXDX just for attending! Bring a friend (or two) and we’ll see you there!

**Do you want to play and grow with a band, without the commitment of starting a band? Join us for our Blues Jams. Great place to network with other musicians.** \*\*$10 for at the door\*\* \*\*Free for Singers and Drummers\*\* **\*Members Get in free and receive other benefits\*** **[Become a Member](https://patreon.com/DoctorStrings?utm_medium=unknown&utm_source=join_link&utm_campaign=creatorshare_creator&utm_content=copyLink)** **Beginner to Pro Blues jam 21+ only, BYOB. Every Thursday.** This is a smaller more practice focused event at my shop. **Open to everyone and is a learning experience for most.** Just bring your instrument(Electric), no need to bring an amp we have all of that. Do not bring a pedal board with a bunch of pedals. The amps are dialed in for blues, trust me it's all there. Drums are here already, very basic kit. If you want to bring cymbals or any other drum gear, please show up early to set up. Also please be aware that other people are going to play the kit as well.

**AI-Supported Creative Exploration** *For Unassuming Intuitives & Practicing Creatives* (Please note that this event has not been organized or endorsed by The Writer's Center.) This meetup is part of AI as Creative Partner — A Practice Group, a set of open, non-sequential creative labs you can join at any point. We use AI as a thinking partner—not to replace your ideas, but to help surface and shape them without overthinking or pressure. You bring fragments—ideas, impulses, unfinished concepts. With AI as a supportive collaborator, we explore how those fragments can become clearer, more coherent, and ready to share if and when you want to. No technical background is required. If you can talk or type, that's enough to work with AI here. This session is intentionally low-commitment and flexible: * Arrive late or leave early * Work quietly or observe * Ask questions, or simply watch the process unfold There's no presentation and no expectation to finish anything. Showing up as you are is enough. **CREATIVE WORK, GENTLY - AN OPEN PRACTICE NIGHT** This is not a workshop or a class. It's a calm room where people show up to work creatively—without urgency, performance, or pressure—using AI as a thinking partner. Come for 20 minutes or stay the whole time. Work quietly, observe, or ask questions. This space adapts to how you arrive. **HOW TO FIND US** Look for the room with the door open on the lower level. Look for the guy with the screen projector and ambient light and sound. Feel free to just walk in and settle. **(*This is an independent meetup using rental space at The Writer's Center. The Writer's Center has not organized or endorsed this event.*)**

Trivia starts at 7 but come early if you want to order food and drink before the game starts. Add message in group chat before 7 if you need help finding us. No phone use during trivia, so if it's after 7 look for team Brainstorm! New players welcome! If needed, we can make 2 teams.

📚 Do you love reading, but wish you had a structure and a community to share your insights with? Join our small circle of curious minds (just 4 members per gathering) as we come together for an hour of focused reading—in the calm setting of a library or the cozy atmosphere of a café. Here’s how it works: First part: Quiet reading on your own—bring a book you’re exploring, whether it’s philosophy, history, psychology, literature, or anything meaningful to you. Second part: We regroup and each person shares key takeaways, insights, or questions sparked by their reading. This sparks a structured yet free-flowing conversation around ideas, perspectives, and personal reflections. Why join? Add structure to your reading habit. Discover new books, authors, and ideas through others’ choices. Build real connections by sharing and listening deeply. Socialize around something meaningful instead of small talk.

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!

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)

# **✨ Match Madness: Glow — Singles Mixer (Ages 42–55)** 📍 Eighteenth Street Lounge — Washington DC 🕗 8:00 PM – 10:00 PM Tired of swiping? Come meet people in real life. Glow is a relaxed singles night designed to help people meet naturally in a fun social setting. Instead of awkward speed dating, we start with a quick online quiz and then move into interactive team games that get everyone talking. Expect things like: • DC trivia • clever conversation starters • surprise team challenges • friendly competition After the games, we reveal suggested matches and connections and open the room for mingling. *** ## 🎟 **Tickets Required** This Meetup RSVP does **NOT** guarantee entry. 🎟 Tickets must be purchased here: 👉 https://matchmadness_glow_2026.eventbrite.com We occasionally release **limited 2-for-1 tickets**, so grab them early. *** ## 🍸 **Drinks & Venue** We’re hosting this at **Eighteenth Street Lounge**, a beautiful DC nightlife venue known for its atmosphere and cocktails. Guests will have access to **happy hour drink specials**, including the **espresso martini**. After the event, the **dance floors and DJs open up**, so feel free to stay and enjoy the night. *** ## ⏰ **Schedule** 8:00 — Arrival + drinks 8:15 — Quick matchmaking quiz 8:30 — Teams form 8:45 — Games begin 9:30 — Matches + mingle Please arrive by **8:30 PM** if you want to participate in the games. *** ## ⚠️ **Notes** • Event is for singles **ages 42–55** • Smartphone with Internet required • Venue has stairs • Photos/Videos may be taken for social media • Respectful behavior is required Come solo or bring a friend — the games make it easy to meet everyone.

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.

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.

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).

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.

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)

**💘 Online Speed Dating Made for Newcomers – Genuine Connections, No Stress!** **⚠️ HEADS UP: Clicking RSVP Isn't Enough!** You **must** sign up through one of the links below and finish the short personality quiz to confirm your place. Choose your age range and register now – **places are limited and fill quickly!** **📋 Find Your Age Range Below to Register:** - **Ages 18-32** → [REGISTER HERE](https://tempodating.com/product?productId=390&productType=onlineSpeedDating&city=Indianapolis&groupurlname=mosaic-mates-empowered-singles&ar=18-32&face_v=19.0) - **Ages 30-46** → [REGISTER HERE](https://tempodating.com/product?productId=390&productType=onlineSpeedDating&city=Indianapolis&groupurlname=mosaic-mates-empowered-singles&ar=30-46&face_v=19.0) - **Ages 40-58** → [REGISTER HERE](https://tempodating.com/product?productId=390&productType=onlineSpeedDating&city=Indianapolis&groupurlname=mosaic-mates-empowered-singles&ar=40-58&face_v=19.0) - **Ages 55+** → [REGISTER HERE](https://tempodating.com/product?productId=390&productType=onlineSpeedDating&city=Indianapolis&groupurlname=mosaic-mates-empowered-singles&ar=55+&face_v=19.0) --- 🌟 **Interested in meeting real singles without the bar scene?** You're home! Our virtual speed dating sessions are thoughtfully crafted with beginners in mind. Every chat is guided, every interaction feels natural, and you never need to step outside your door. 🎯 **Perfect for:** - First-time speed daters excited to try something different - Anyone who feels uneasy about conventional dating scenes - People getting back into dating after a hiatus who want a gentle re-entry ⭐ *"I nearly didn't sign up because I was anxious. So happy I did – best choice I've made!"* – First-time speed dater **Event Details** - **Format:** Zoom gathering – real-time chats in a chill online space - **Location:** Right from your home – no need to go anywhere at all! - **Host:** Expert moderator who ensures every conversation flows smoothly - **Vibe:** Easy-going connections with friendly Indianapolis singles – enjoyable and relaxed **How It Works** 1. **Find Your Age Group** – Locate your age range above and click to sign up. 2. **Do the Short Personality Assessment** – This lets us optimise your matches for the night. 3. **Hop on Zoom** – Pour yourself a drink, get settled, and let the host walk you through each round. 4. **Enjoy the Conversations** – Every round is timed and hosted so each chat feels easy and fun. 5. **Get Your Matches** – After the event, mutual matches are revealed. Start building a real connection! --- ✨ Amazing connections begin with a single conversation. Yours could start this evening! 💗 ✨