Symfony

Please arrive early (no later than 7:30) to stretch out and warm up. Wear a black jersey and bring a pair of shin guards.

Dulles Code & Coffee is a collaborative community of software and technology enthusiasts seeking to learn, grow, and help each other. All skill levels are welcome. The concept is simple. Bring a laptop and ideas. We’ll provide coffee, tea, and donuts. Thank you to [BTI360](https://www.bti360.com/) for sponsoring this event. ## **Event Format** 1. At 9:15 everyone introduces themselves and briefly describes what brought them out this morning (project, homework, networking, etc.). 2. For the rest of the day folks work in the communal space, socializing and asking/giving help as desired. ## **Location** BTI360’s Office in Herndon The office is across from Worldgate, looking down on the toll road. ## **Address** 12930 Worldgate Dr, Ste 400, Herndon, VA 20170 [[map](https://goo.gl/maps/pF5ZrPUviX1vtmdSA)] ## **Logistics** * **Must be a U.S. Citizen to attend. Real ID verification is required.** * PARKING: Use the surface lot. All spaces marked MIII are open for parking. Please avoid Management spaces, State Farm and SP+ * ARRIVAL: Follow the signs from the front entrance to the freight elevator located in the parking garage on level P2. Take the elevator to Suite 400 (Floor 4). * How to find us video: [https://youtu.be/ohqFzyqiASE](https://youtu.be/ohqFzyqiASE) ## **Community Guidelines** We value the participation of each member of the community and want all attendees to have an enjoyable and fulfilling experience. To ensure a conducive environment, all participants are required to conform to our [code of conduct](https://github.com/DullesCodeCoffee/.github/blob/main/code-of-conduct.md).

**In a time of division and isolation, come be part of the community that's rebuilding the town square, one table at a time.** In BreadBreakers, we use the common space of the dining table to have conversations where neighbors can **hear, be heard, and know one another.** If you're hungry for good discourse and deeper community, join us for lunch and a conversation on ***World’s Diversity on the Table: How Traveling Helps Us Understand Different Worldviews.*** Here’s how it works: For just two hours, a table of people set aside the need to "convince" or "win" and instead focus on sharing, listening, and connecting. Guided by an experienced table host, we'll tell our stories, try to understand each other, and practice being in community with those with different views or backgrounds. In a world of disconnection and surface-level interaction, we'll carve out some time just to be humans together and have a meaningful conversation. We'll be meeting at Wegmans, Upper Level Dining Area - look for your hosts, Albert and Todd. This will be a "bring your own lunch" gathering (or "buy your own", from Wegmans' great self-serve cafe!) BreadBreakers, an initiative by Restoration United Methodist Church in Reston, VA, is a religiously inclusive community where all beliefs, faiths, and stripes are welcomed. Our leadership and volunteer team includes people who attend Restoration and people who don't. **So - why talk about travel? Here's a word from this event's lead host, Albert:** *Travel is more than movement across geography, visiting cities, viewing landscapes and counting distances. Travel is also an inward movement: an encounter with difference that rearranges how we see the world and ourselves.* *When we travel, we are exposed to other ways of organizing life: different assumptions about time and values, family and belonging, work and dignity, authority and trust, hospitality and faith. Even brief encounters can unsettle what we once considered “normal” or self-evident, sometimes gently, sometimes harshly, not too much differently as we may encounter on the other side of our divided country.* *Some of us travel seeking beauty, rest, or novelty. Others travel to escape the noise, to understand, to remember, or simply to feel less confined by familiar routines. And when we return, we often carry more than we expected: stories, questions, discomforts, changed perceptions, or a renewed sense of home. The focus of our discussion is not destinations or expertise. It is about meaning. How encounters with different worldviews leave traces in us—and how those traces shape the way we interpret our own world once we return.* *Each experience is partial, each perspective incomplete, and yet, together, we can see more of the whole. Shared at the table, such diversity becomes something lived rather than abstract.* *This conversation shall prompt us to reflect on two simple questions:* 1. ***What do we look for when we travel to other places and cultures?*** 2. ***And what do we bring back—beyond souvenirs and photographs?*** We look forward to breaking bread and stories with you.

Date : Feb 7 2026 13:00 - 15:00 EST Title: Symmetry, Topology, and Magnetoelectric Multiferroicity — Ferroelectric 'Tweezers' for Quantum Magnetism in Hexagonal Ferrites Abstract: The scalability of future quantum and spintronic hardware is currently facing a "physical wall": the challenges of excessive heat dissipation and environmental magnetic noise. To overcome these barriers, materials where magnetism can be controlled with high precision and minimal energy will be highly desirable. Magnetoelectric multiferroic hexagonal rare-earth ferrites (h-RFeO3, R: rare earth) have emerged as an important platform for this mission, offering a unique "playground" where symmetry and topology dictate functionality. In this talk, I will provide a comprehensive overview of research progress on these materials over the last decade. We will explore how a specific structural transition—trimerization—breaks symmetry to create a robust state known as improper ferroelectricity as well as weak ferromagnetism. The coupling between the ferroelectric and magnetic orders leads to a "ferroelectric tweezer" effect, where the material's ferroelectric domain spatially anchors and manipulates magnetic domains. Furthermore, we will address the "readout challenge": how to detect the diminutive magnetic moments inherent in these systems. I will show how the non-coplanar spin topology acts as a signal amplifier, enabling high-fidelity readout of magnetic states through spin-transport. By understanding the "solid science" of these complex oxides, we can define the roadmap for a new generation of stable, low-power topological electronics. Biography: Xiaoshan Xu is Susan J. Rosowski Associate Professor from Department of Physics and Astronomy at University of Nebraska-Lincoln. He graduated from Nanjing University in 1997 and 2000 with his bachelor’s and master’s degrees respectively. He received his Ph. D. in Georgia Institute of Technology in 2007. After that, he worked at the University of Tennessee as a postdoctoral researcher and Oak Ridge National Lab as an R&D Associate. He joined the University of Nebraska in 2013. He is a recipient of the Eugene P. Wigner Fellowship of the Oak Ridge National Lab, NSF Early Career Award, and DOE Early Career Award. His research interests include oxide and organic thin film growth, spintronics, multiferroics, and quantum materials. Moderator: Dr. Sebastian Zajac, member of QPoland

February 8，学什么：介绍《菩提道次第广论》 踏入《广论》研讨班，对许多人来说是开启生命转变的契机。或许您也会好奇：在繁忙的工作与生活之余，投入时间研读佛典，究竟能为人生带来哪些实质的成长与收获？ 《广论》研讨班秉持着日常老和尚以心灵提升、圆满生命的目标，提供大众身、心、灵健康的学习环境与循序渐进的佛法课程。学员通过听师父的录音带和研讨交流，对佛法建立整体认识，全面的理解，同时学习如何将佛法智慧运用于生活中，打造幸福人生。 **《菩提道次第广论》简介** 佛法大全，给与您心灵滋养，人生方向 次第井然，引领您脚踏实地，步步向上 心智科学，帮助您认识自己，了解他人 幸福教育，教会您正确取舍，离苦得乐 生命教育，陪伴您创造希望，走向美好

Socialize, mingle and dance the night away, your memorable one, rubbing your shoulder with DC's party snobs. We gather, grab a drink, grind and grin. ***GRAB A DRINK AND YOU ARE ALL SET TO ENJOY THE EVENT. YOU NEED TO GET AT LEAST A DRINK OR FOOD :) To get the event going and show support. We know that you like our events. P.S. : We have non-alcoholic drinks as well.*** We have a tiny venue and we hit capacity often and early arrival is suggested. We have the discretion to decide entry. ***AFTER THE SOCIAL, WE HIT THE DANCE FLOOR! BRING YOUR DANCING SHOES, WE WILL DANCE THE NIGHT AWAY!*** **This is also a wicked 'MeRtUp'!** **What is MERTUP?:) Mer + Meetup = Mertup.** **Mer is known as the Meetup guy. He likes to connect people and his fans coined that name for him. So, at his events, everyone will become a Wing Person to everyone:) When you get get there, we will introduce you to someone and you will be responsible to introduce that person to another person. That is MERTUP!** We will have specials, including our usual suspect MERtini:) Dress code : Weekend Casual Event is free and 21+ * Come one, come all; YOU COULD FLY SOLO TOO:) This is the most friendliest event you have ever attended! * Feel free to invite your friends. They don't necessarily have to be a member * Ideal for either you are new in town or not, to make friends and acquaintances * RSVP on Meetup is required. That is how we check you in. * We will have a registration station and check you in. Cover is $20. **But it is FREE for us with RSVP. So, you must RSVP, otherwise you will be subject to payment.** **Fellas, it is hard to pass on this!** http://photos1.meetupstatic.com/photos/event/d/8/c/0/600_447175488.jpeg http://photos4.meetupstatic.com/photos/event/d/8/c/7/600_447175495.jpeg http://photos3.meetupstatic.com/photos/event/b/0/8/2/600_436665186.jpeg http://photos4.meetupstatic.com/photos/event/b/0/8/8/600_436665192.jpeg http://photos2.meetupstatic.com/photos/event/9/e/8/9/600_433120585.jpeg http://photos3.meetupstatic.com/photos/event/9/f/a/d/600_433120877.jpeg http://photos3.meetupstatic.com/photos/event/a/5/8/7/600_433122375.jpeg

Because bloody Valentine's. We can refine as the date approaches but Fabbioli redeemed themselves with the sparkling rose and sparkling Pinot Grigio. Raspberry Merlot, not so much.

Simply Social is tucked away off Sunrise Valley in Reston. They've got a good selection of savory bites, and their matcha and espresso drinks are always tasty. They've got a decent amount of seating and a nice community vibe here. Grab a pastry (or not) and let's enjoy another winter Sunday morning. (No discussions on politics, religion or potentially controversial topics. We're here to relax and have fun. Just be respectful and we'll be alright. Pay your own way, and enjoy!)

**This isn’t just a meetup. This is a full-night vibe.** A new spot for us, but the same legendary Social Sips & Bites energy you know and love. Join Social Sips & Bites for an all-out night of dinner, drinks, DJ-driven music, and dancing-the kind of night where the plan is simple: show up, relax, and let the evening unfold. Early vibes We kick things off with dinner and drinks, easy conversations, familiar faces, and new connections. It’s the perfect warm-up- lots of laughs, great energy, and that unmistakable feeling that the night is about to level up. 9:00 PM - GAME ON The DJ turns it up. The dance floor comes alive. The room shifts from hangout to full celebration. And before you know it, we’re dancing well into the early hours of the morning. What to expect • DJ and dance floor • High-energy music, great food, strong drinks • A welcoming crowd that knows how to have a good time • One of those nights you swear you’re leaving… but somehow stay Come early to connect. Stay late to dance. Lose track of time somewhere in between. This is Social Sips & Bites — and we’re just getting started.

Sunday service at Unity of Fairfax will leave you feeling inspired, blessed and empowered to experience the fullness of life. **On a Spiritual Journey** Our community is made up of people, like yourself, who have been led to Unity by Spirit. We are all here because we’re on a spiritual journey to become all that we were created to be. **Welcome to Everyone** Unity welcomes people of all religious backgrounds and beliefs. We welcome people of all creeds, sexual orientation and social background. There are no exceptions in our welcome to everyone. **We Offer Tools** In Unity we don't tell people what to think; rather, we offer tools that individuals can use to create lives of meaning and purpose. **What We Believe** To review what we believe, go here: https://unityoffairfax.org/what-we-believe-what-unity

Please arrive early (no later than 7:30) to stretch out and warm up. Wear a black jersey and bring a pair of shin guards.

Bonsoir à tous! Venez nombreux pour causer autour d'un repas ou d'un verre chez La Madeleine. On n'a que deux règles: (1) qu'on y parle exclusivement le français et (2) qu'on achète quelque chose à boire ou à manger (c'est La Madeleine qui le demande). Merci et à bientôt!

Come to the Silver Spring library to play games some chronically ill friends! Members are adults who suffer from conditions including POTS, ME/CFS, long covid, MCAS, rheumatoid arthritis, Ehlers Danlos, multiple sclerosis, ulcerative colitis, autoimmune kidney disease, and more. 
We'll have some board games available to play, and feel free to bring some of your own favorites. We'll also have coloring supplies on hand if you prefer to just relax or socialize.
 We'll in SMALL ROOM 1 on the third floor of the Silver Spring library, just outside the elevator. As always, we ask everyone to wear a mask. There is parking across the street in the Wayne Avenue Garage.

**Title**: Powering AI Through Data Modernization: Modernizing ETL with Databricks & Unity Catalog In this session, we will discuss how enterprises are modernizing their data platforms by migrating from legacy ETL tools (such as Informatica and traditional data warehouses) to Databricks Lakehouse architecture, and how Unity Catalog enables enterprise-grade governance, security, and discoverability across data and AI assets. We will start with food and drinks at 6pm and then move into the presentation at 6:30pm. The session will cover: * Why traditional ETL platforms are becoming a bottleneck for scale, cost, and AI adoption * How Databricks changes the data engineering and analytics operating mode * The role of Unity Catalog in centralized governance * How this foundation enables AI and Gene.AI use cases on trusted data * Q&A Our speaker for this event is **Hirenkumar Dholariya**. Hirenkumar Dholariya is a Senior Data Engineering Architect with 18+ years of experience modernizing enterprise data platforms for global Fortune 500 organizations, delivering up to 40% system performance improvement and 20–35% infrastructure cost reduction through large-scale migration from legacy ETL platforms to cloud-native Lakehouse architectures. He specializes in Databricks-based data engineering, Unity Catalog–driven governance, and building scalable, secure, and real-time analytics platforms. He has led multiple enterprise-wide transformations from tools such as Informatica and traditional data warehouses to Databricks, establishing governed data foundations using Unity Catalog and enabling advanced analytics and AI use cases on top of trusted data platforms. His leadership focuses on architecting durable data platforms, enabling teams to move faster with confidence, and translating data and AI investments into measurable business outcomes. *

Hello Minglers! We are excited to announce the date of our first mingle! The date will be Thursday, February 19th at 6pm and will be held at Union Pub, 201 Massachusetts Avenue NE. Union Pub is 5 minute walk from the Union Station metro stop. Look for the mingle project logo, all are welcome! If you have any questions or suggestions, feel free to reach out! Scott and Jeff

*TOPIC:* **The Foundation: Why Your Entity Choice is Your First Line of Defense** Is your business built on a rock or in the sand? Most entrepreneurs pick an entity structure based on a quick Google search, but as your business grows, that "simple" setup can become your biggest liability. Join us this month as Snapper Tams, Esq., co-founding partner of Cerulean Law Group, takes the mystery out of legal infrastructure. Drawing on his deep experience in business litigation and partnership disputes. Learn more about Snapper, [www.CeruleanLawGroup.com](http://www.ceruleanlawgroup.com) **Entrepreneur Breakfast Club** 🥓☕ Fuel your business. Feed your soul. Welcome to the **Entrepreneur Breakfast Club** — where small business owners come together over coffee, connection, and contagious energy. We’re not just here for pancakes and pep talks (though we love both). This is a morning meetup built for the dreamers, doers, and difference-makers in our local communities. Whether you're launching your first side hustle or running a seasoned shop, you belong here. Our mission? **Connect. Inspire. Grow.** We believe big things happen when passionate people sit at the same table. So come grab a seat, swap stories, share wins (and fails), and leave each meetup a little more fired up than when you came in. **Join us if you’re looking to:** ✅ Meet like-minded small business owners ✅ Get real-world advice & fresh ideas ✅ Build meaningful partnerships ✅ Start your day with purpose and inspiration No suits, no sales pitches — just good people, great conversations, and hot coffee.

DC iOS returns to the Capital One campus for our first meetup of 2026! Come and meet with fellow Apple developers in the DC Area, enjoy some food, networking, and a great tech talk! PLEASE INDICATE IF YOU WILL BE ATTENDING IN PERSON OR OVER ZOOM. **Agenda:** • 5:40 PM - Doors Open (in-person attendees). **Don't forget your ID!** • 6:10 PM - Welcome (in-person and Zoom attendees) • 6:15 PM - **Talk: *SwiftUI Internals + Performance*** • 7:05 PM - Community Announcements & Networking • 8:00 PM - Doors close **Talk Description:** **SwiftUI Internals + Performance** Will Downey A fast-paced breakdown of how SwiftUI works. Aimed at helping build a conceptual understanding of SwiftUI whether you're experienced with the SwiftUI or still hanging on to UIKit. Bonus section on optimizing SwiftUI performance and profiling if time permits. Zoom Link: [https://us06web.zoom.us/j/89091509354?pwd=7y7ghL5i9iSA9rgbpQCdrBiWy5QX7c.1](https://us06web.zoom.us/j/89091509354?pwd=7y7ghL5i9iSA9rgbpQCdrBiWy5QX7c.1) **Location:** Capital One, C2 Building 1680 Capital One Drive, Mclean VA, 22102 100A Visitor parking is either in the garage attached to 1680 Capital One Drive, or the open lot next to 1600 Capital One Drive. After that you will walk over to the main entrance of 1680 Capital One drive, and then walk around the right to the corner to room 100A For the metro, take the Silver Line to the McLean metro stop, then walk into main campus (about a 5 minute walk). From there, walk to the main entrance of 1680 and then go to room 100A **What you need to bring:** ID **When to arrive:** Doors open at 5:50pm ET Event will start at 6:10 pm ET **Will food and drinks be provided?** Yep! **Will there be rapid testing provided?** No **Will masks be required?** No