C#

Let's get together to play some competitive doubles volleyball. **COST**: FREE **Court Type**: Outdoor grass **Minimum Skill Requirements**: BB+ (click [here](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/mobilebasic) for details) Attention: 1. This event is **NOT on a first come-first serve** basis and players with higher skill level and players who can bring a net/ball will get priority over others on the wait list. 2. Since skill levels are **self-reported**, some new attendees may not meet the expected level. For doubles, we encourage you to choose a partner you can enjoy the game with, and since this a competitive event, it is okay if you make a strong team and win all the games. 3. Each person must help set up and take down one net, leaving some nets unset for latecomers. 4. Please answer all questions, so it's helpful for us to organize the event. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Smiley Social documents:** 1. [Group Rules ](https://docs.google.com/document/d/1HrG35p_0M08leRvCp8XWG3CMkr_GL928XFabl5T6Dvg) 2. [Liability Waiver ](https://docs.google.com/document/d/1W2mq-7m99lmvd7gdWYaSUFtvVg4UGnzV6koafAbHmco) 3. [Volleyball Levels](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/)

You must read the following NVHC Sign-in Sheet Statement/Liability Disclaimer, [https://nvhc.com/signin.pdf](https://nvhc.com/signin.pdf) and then answer the question that you will see when you RSVP with "I accept" to be permitted on the hike. **10 mile circuit hike with about 650 feet of elevation gain.** ***Join us for a scenic hike on this Martin Luther King, Jr. birthday along the C&O Canal towpath and the forest trails of Blockhouse Point Conservation Park.*** **Description:** Starting from Lock 22 Pennyfield Lock parking lot off of River Road we will hike on the C&O Canal towpath. We will then hike to Violette's Lock and on to Riley's Lock where we'll cross the Seneca Creek Aqueduct and take a short side trip to the Seneca Mill & Quarry Ruins. We'll retrace our steps and take a lunch/snack break at Riley's Lock before heading back to Violette's Lock where we will make our way into Blockhouse Point Park. We will take several trails in the forest and stop at a couple of overlooks of the Potomac and Canal Towpath on our way back to the parking lot to complete the circuit. This is a B hike due to the mileage, but most of the hike is level. There is one short but somewhat steep hill going up into the forest. You might want to bring hiking poles if you normally use them on hills. The overlooks are short out and backs and descend slightly from the forest area. **These rocky overlooks offer great views of the Potomac!** The pace will be about 2.5 mph. There are porta-johns at the locks. **Bring**: Adequate water/hydration, snacks/lunch, and sturdy hiking shoes since there are some rocky areas and tree roots with a lot of leaf coverage on the ground. There is one small stream that is easily stepped across. **Fee:** There is no park fee. **Dogs are welcom**e. NVHC Dog policy: [https://tinyurl.com/nvhcdogpolicy](https://tinyurl.com/nvhcdogpolicy) Meet at the trailhead parking lot 15 minutes early to allow everyone to sign in and get ready to hike at 9:00am. **Blockhouse Point Park**: [https://montgomeryparks.org/parks-and-trails/blockhouse-point-conservation-park-trails/](https://montgomeryparks.org/parks-and-trails/blockhouse-point-conservation-park-trails/) **C&O Canal Pennyfield, Violette's, and Riley's Locks:** [https://birdersguidemddc.org/site/co-canal-pennyfield-violettes-rileys-locks/](https://birdersguidemddc.org/site/co-canal-pennyfield-violettes-rileys-locks/) **C&O Canal Pennyfield Lock:** [https://www.canaltrust.org/pyv/lock-22-parking/](https://www.canaltrust.org/pyv/lock-22-parking/) **Meeting Place Instructions:** We will meet at Pennyfield Lock, Lock 22 parking area on Pennyfield Lock Road. **GPS 39.053641, -77.288893**. See attached directions in the link. After turning onto River Road west from I-495, **Pennyfield Lock Road** is about 8.5 miles on your left. Keep your eyes open and look for the sign for the turnoff onto Pennyfield Rd intersection. Proceed to the end of Pennyfield Road. I will be in a white Nissan SUV with the rear hatch open. **Post hike rehydration TBD.** If you have questions, please message me here or call/text me at 202-528-0456. If you text me, please include your name.

## Details - Please read all below before you sign up **Cost:** Free **Court Type:** Outdoor Grass **Level:** B/BB/A **Transportation:** Parking will be right by the grass. **What to bring:** at least 3 bottles of water and a ball/net if you have one. **10 persons per net max** **Host's Philosophy on this event:** The purpose of this meetup is to create a fun and supportive environment where we can improve our skills, enjoy competitive games, and connect socially. While we do aim to play seriously and challenge ourselves, the focus is more on growth and enjoyment than simply winning at all costs. That’s why the title doesn’t include “competitive” or “social”—we want a healthy mix of both. This is a space where you won’t be judged for making mistakes, but we do expect a mindset geared toward learning and getting better over time. That said, this group isn’t intended for total beginners; a basic understanding of the game is expected so that everyone can contribute to meaningful and engaging matches. The host holds the right to remove you from the game if they believe that you are at a C level. **Skill Level:** 1. **If you want to know your level, please see the link below:** [Smiley Social Volleyball Levels](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/edit) **YouTube:** The games may be recorded and uploaded to our channel here: Let the host know if you have an issue with this. [Youtube](https://www.youtube.com/@mp02626) **ATTENDANCE:** **Player Selection:** Regulars > League Members > Your Vibe > Skills > \*Your Attendance Ratio > New Members \* If you have 3 events attended and 6 events you dropped off, you may or may not be invited. Anyone with a drop-off level of -.50 or lower. The host takes attendance very seriously. Please remove yourself from the event (if you can't make it) as early as possible to allow others to join. You will be marked as a ***no-show*** if you don't show up to the event, including removing yourself 60 min or less before the event start time. [Smiley Social Rules](https://docs.google.com/document/d/1HrG35p_0M08leRvCp8XWG3CMkr_GL928XFabl5T6Dvg/edit) **Q&A** * Bringing your dog is welcome and encouraged. * *Can I come if I don't know how to play?* No, you may not. The host does teach a beginner's volleyball class that you may attend on Saturdays. * *Can I be late or leave early?* The host expects you to be there **on time** and leave on time. If you need to come late or leave early, please let the host know ahead of time. * *Can I come even if I am not on the going list?* No, sorry **Smiley Social documents:** 1. [Group Rules](https://docs.google.com/document/d/1HrG35p_0M08leRvCp8XWG3CMkr_GL928XFabl5T6Dvg) 2. [Liability Waiver](https://docs.google.com/document/d/1W2mq-7m99lmvd7gdWYaSUFtvVg4UGnzV6koafAbHmco) 3. [Volleyball Levels](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/)

**This talk has completely sold out in advance and no door tickets will be available.** [Profs and Pints DC](https://www.profsandpints.com/washingtondc) presents: **“A Practical Guide to Social Change,”** a research-based look at how communities bring about reform and progress, with Marissa Robinson, founder of Real Health Impact LLC and an adjunct professor at George Washington University who teaches courses focused on public health leadership and social change. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://www.ticketleap.events/tickets/profsandpints/dc-social-change](https://www.ticketleap.events/tickets/profsandpints/dc-social-change) .] Systems built on inequality rarely transform without deliberate pressure from the people most committed to justice, because progress takes coordination, conviction and willingness to change what has always been accepted. Real change starts when people choose to move together. Learn what research and experience say about how to make real social progress with Dr. Marissa Robinson, a public health practitioner who previously worked in federal agencies coordinating global and national public health initiatives focused on infectious diseases, HIV, and health equity. Among the key questions she’ll tackle: How do communities overcome barriers to create real change? When should evidence guide decisions and when does context matter more? She’ll discuss established frameworks for moving from intention to measurable progress and talk about the importance of building coalitions that actually work and of making decisions grounded in real data. You’ll learn about the importance of testing ideas on a small scale before going big, as well as how to use rapid feedback loops and continuous improvement cycles to refine approaches and scale what truly works. Dr. Robinson will share stories of ordinary people and communities who refused to accept the status quo and pushed through real barriers to achieve breakthrough results. She’ll talk about practical strategies, usable frameworks, and evidence-based examples that people can apply immediately in their own communities and organizations to support change that lasts. If you have dreamed about bringing about progress in your world, this talk will give you the clarity, direction, and confidence it takes to turn such dreams into reality. (Door: $17, or $15 with a student ID. Listed time is for doors. The talk starts 30 minutes later.) Image by Canva.

This month, we're discussing API design and single-header libraries. How should we structure and program libraries to impose as few usage constraints as possible? We’ll look at [the STB libraries](https://github.com/nothings/stb) and other examples as case studies. *Note the slightly different time than usual.* We're still at the West End Library. **Agenda:** \- 1:45 \- 2:45pm: Library discussion \- 2:45pm \- whenever: Keep chatting over lunch nearby **What we do** Presentations on lower-level, foundational programming topics, ethical software, knowledge sharing, mentoring, and discussion. **Who we are:** We are all about handmade software. Rather than focus on frameworks, heavy abstractions, and buzzwords - we typically create projects or research topics that build an understanding of foundational computing concepts, essential data structures, and hardware/software interaction. **What to bring?** Bring a laptop, project, or just a curious mind. If you're not sure you're ready to contribute, don't worry: we're all here to share our passions and hone our craft. **If you arrive late:** Please enter the room quietly as to not disrupt anyone that is presenting. You can take any empty seat.

*You must read the following NVHC Sign-in Sheet Statement/Liability Disclaimer, [https://nvhc.com/signin.pdf](https://nvhc.com/signin.pdf) and then answer the question that you will see when you RSVP with "I accept" to be permitted on the hike.* (7ish-mile \*FUN\* exercise loop hike on the National Mall with occasional nano-runs [or optional fast walks].) We'll \*BRISKLY\* hike 7ish flat miles along dirt and paved trails and multiple staircases at the National Mall with stops roughly every 1/4 to 1/2 mile for 2 minutes of bodyweight exercises. Before each stop, we'll do a 30-second NANO-RUN (or fast walk or stairs). All exercises are modifiable and partner exercises are optional. We'll cover much of the National Mall. Starting at the restrooms by the (closed) World War II Memorial, we'll head past the Washington Monument and the Smithsonian's museums to the Capitol. Then we'll head to the Jefferson Memorial and follow the Potomac River to the Watergate steps (where First Lady Michelle Obama exercised on "The Biggest Loser" TV show. We'll hit the Lincoln Memorial and Constitution Gardens before returning to the WWII Memorial. There will be SELFIES! **MEET:** 9 am, bathrooms by World War II Memorial, 17 Street, SW at Independence Avenue, SW. Copy these GPS coordinates into Google Maps: 38.888064, -77.041273 **CLOSEST METRO:** Smithsonian Metro, 12th Street SW at Jefferson Drive SW, The National Mall. [https://www.wmata.com/rider-guide/stations/smithsonian.cfm](https://www.wmata.com/rider-guide/stations/smithsonian.cfm) **PARKING:** Please read the meters (and/or consult Parkmobile) before you park and check DC's parking website because parking is no longer free on the Mall and you can only park for 3 hours. It appears that you can still get FREE METERED STREET PARKING if you park A COUPLE OF BLOCKS OFF THE NATIONAL MALL. There is likely free on-street parking by Virginia Avenue but I'm waiting to confirm that. Subway or private parking lot is recommended because 4.5 hours of metered parking may not be available. Consult DC's website: [https://www.parkdc.com/documents/20119eec435540ee8b6c49fcc314ac6c/explore](https://www.parkdc.com/documents/20119eec435540ee8b6c49fcc314ac6c/explore) **BRING:** Mandatory water, sense of humor, and sense of awe. Optional: oversized TRASH BAG TO SIT ON if you don't want to sit on the dirt or grass, gloves for pushups/planks, fully charged cell phone, and snack. **PLEASE READ. YOU \*WILL\* BE GRADED ON THIS: ;)** 1\. Adults only\. 2\. No pets\, including albino squirrels \(which we may see on the Mall\)\. 3\. Please do NOT attend unless you are experienced with bodyweight exercises\, you have done recent strength workouts\, and you can and will safely and cheerfully keep up with our moderate to BRISK pace \(about 3 mph while moving\)\. All exercises are optional and modifiable. Generally we'll do bodyweight exercises such as squats, lunges, situps, pushups, planks, wall sits, star jumps -- get that iPhone ready for the jumping pix! -- and other typical "boot camp" exercises. Hike leader is \*NOT\* a certified fitness trainer but just passing on exercises she has learned from fitness classes. Finish time is approximate for planning purposes. **WEATHER:** Hike will likely be cancelled or rescheduled due to rain/sleet/snow. Weather forecast will be posted here on Jan. 24 by 5 p.m. **RESTROOMS:** At the start and along the mall. (But there could be lines.) **WORLD WAR II MEMORIAL:** (Closed for repairs but we're meeting at the restrooms.) [https://www.nps.gov/wwii/index.htm](https://www.nps.gov/wwii/index.htm) **NATIONAL MALL MAP:** [https://www.nps.gov/nama/planyourvisit/maps.htm](https://www.nps.gov/nama/planyourvisit/maps.htm) **PARKMOBILE:** https://parkmobile.io[https://parkmobile.io](https://parkmobile.io)

**RSVP DOES NOT GUARANTEE YOUR SPOT. You must register via our website:** [https://georgewashingtonvolleyball.totalcamps.com/Content/29778](https://georgewashingtonvolleyball.totalcamps.com/Content/29778) **Winter Adult Offensive Skills Camp II** This camp is designed for **adult volleyball players (ages 20 & above)** looking to improve their offensive skills. Ideal for **all skill levels**, this camp offers an opportunity to receive skill instruction from George Washington's coaching staff. Players will be grouped by experience & skill level to ensure the best possible experience. **What to Expect:** You'll train directly with GW Volleyball's Coaching Staff & Players to improve offensive skills such as attacking, serve receive, rotations, setting, etc. We will spend the first hour & a half on skill instruction & the last 30 minutes playing competitive 6v6. **Camp Schedule:** 🗓️ *Tuesday, January 20th* * 6:45 PM – Doors Open, Check-in begins at the Charles E. Smith Center * 7:00 PM – Camp Begins * 9:00 PM – Camp Ends **Important Info:** * **You must register via our camp website**: [https://georgewashingtonvolleyball.totalcamps.com/Content/29778](https://georgewashingtonvolleyball.totalcamps.com/Content/29778) * This camp is for **adults only** – you must be **above the age of 20 or have exhausted your NCAA eligibility.** * You will enter the Charles E. Smith Center at the **Ticket Office Entrance**, located on 22nd St. * **Please do not arrive early; basketball will be finishing up their practice at this time & we cannot accommodate your arrival earlier.** * Payment is due at the time of signup. * *By registering, you agree that we may use your photo for marketing.* We can’t wait to see you there!

You must read the following NVHC Sign-in Sheet Statement/Liability Disclaimer, [https://nvhc.com/signin.pdf](https://nvhc.com/signin.pdf) and then answer the question that you will see when you RSVP with "I accept" to be permitted on the hike. Tip o' the fedora to Willem Jansen for pioneering this route. This is a 7 mile lollipop hike with about 650' of elevation gain. Our route will take us through McLean and Arlington as we explore two tributary streams of the Potomac, and the remains of two Civil War era fortifications defending the Chain Bridge approach to Washington. From the Marie Butler Leven Preserve parking, we'll descend to Little Pimmit Run, merging into Pimmit Run. We'll take a short out-and-back side trail up to Fort Marcy before continuing on the Potomac Heritage trail to Chain Bridge. Upon reaching Gulf Branch, we'll follow that trail to the Gulf Branch Nature Center where we'll pause for a short snack break. We'll ascend to Glebe Road where we'll pass through the second Civil War fortification, Fort Ethan Allen, before returning to the Pimmit Run trail and back to the trailhead parking. Most of the hike is relatively flat, but includes a couple of short, steep, uphill sections. The natural surface portions of the route are narrow in spots and have many roots, and a few stream crossings. Poles may be useful. The parking lot at the starting point accommodates 12 cars. If it is full when you arrive, don’t park on Kirby Road, but in the Potomac Hills neighborhood, along Loch Raven Drive or Colleen Drive. No restrooms at the starting point; there is a porta potty at the rest stop. **Pace:** 2½ mph when moving. **Leader:** Steve Wiley, 571-345-6441 **Rating:** C **Dogs** are permitted on this hike in accordance with the NVHC Dog Policy. [https://tinyurl.com/nvhcdogpolicy](https://tinyurl.com/nvhcdogpolicy) Please contact me if you plan to bring your dog. **Trailhead:** See at the Marie Butler Leven Preserve, GPS coordinates **38.929789, -77.146651**. **Meet at 9:15**. We hike at 9:30. You may also find it in your navigator by inputting 1501 Kirby Road, McLean. **Map for hike:** downloadable AllTrails route [Leven Preserve - Fort Marcy - Gulf Branch](https://www.alltrails.com/explore/custom-routes/leven-preserve-fort-marcy-gulf-branch-b16524e?u=i&sh=pkltl9) and a [Printable pdf of route](https://geppetto-cdn.production.alltrails.com/pdf/v2/leven-preserve-fort-marcy-gulf-branch-b16524e-429884ce.pdf)

Happy New Year! This is our first Cantonese event in 2026. All levels of Cantonese proficiency are welcome! 新年快樂！ 今次係我哋 2026 年第一個廣東話活動，歡迎各水平嘅廣東話愛好者！ PS - Parking is free in the Metro parking garage on weekends. 週末地鐵嘅停車場係免費嘅。

**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 **Abstract** GitHub Copilot is rapidly changing how developers write, understand, and maintain code. Powered by generative AI and deeply integrated into modern development environments, Copilot acts as an intelligent coding assistant, helping developers move faster while maintaining quality and focus. In this session, we’ll explore what GitHub Copilot is, how it works, and where it fits into a real-world developer workflow. We’ll break down what Copilot can (and cannot) do, where it can be used, and how licensing differs for individuals and organizations. Most importantly, this talk goes beyond theory with a live, hands-on demo showcasing Copilot inside the IDE and on GitHub, demonstrating how it can assist with code generation, refactoring, learning new APIs, and accelerating day-to-day development tasks. Designed for developers, technical leads, and engineering managers, this session provides a practical introduction to AI-assisted development, highlights best practices for getting value from Copilot, and closes with guidance on how to continue learning and evolving alongside this rapidly advancing tool. Attendees will leave with a clear understanding of how GitHub Copilot can enhance productivity, improve developer experience, and fit into modern software teams today, not someday. **YouTube Link** TBA

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

**NEW LOCATION: 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). For this first meeting of the year, we will be reviewing submissions for the [Your Program is Hideous and Obfuscated Challenge (YPHOC). ](https://docs.google.com/document/d/13zbxwElpJqPMuAN4Ele2hUgsqtFKzH3OCTL5NEeiLKQ)Submissions for this challenge are due by January 12th, 2026. The details can be found here: or on our website http://www.cohpy.org See Our [Parking Map](https://docs.google.com/presentation/d/1u2A4fLNlxwLJn0KA_hKc8bnFlFHLvsHBDh-_8wzX_tk/edit?usp=sharing) 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 centralohpython@gmail.com

## Learn Infrastructure-as-Code (the FUN Way) — Through Minecraft 🎮☁️ **Joint Meetup: Azure CBUS × Columbus HashiCorp User Group × DevOps Columbus** What if learning Terraform and Infrastructure-as-Code didn’t feel like a whitepaper… but more like a game? Join us for a joint Azure CBUS, Columbus HashiCorp User Group, and DevOps Columbus meetup where **Mark Tinderholt** \(Principal Architect\, Microsoft Azure \| HashiCorp Ambassador \| “The Azure Terraformer”\) shows how **Minecraft** can be used as a surprisingly powerful way to understand real-world Infrastructure-as-Code concepts. In this session, Mark will demonstrate how Terraform and Azure can be used to provision, configure, and manage Minecraft servers—while teaching the same patterns you’d use for production cloud infrastructure. ### What we’ll cover * Infrastructure-as-Code fundamentals using **Terraform** * Provisioning real infrastructure on **Azure** * Applying **IaC best practices** (immutability, repeatability, versioning) * How playful environments like Minecraft make complex concepts *click* * Why learning through experimentation beats click-ops every time ### Who should attend * Developers, platform engineers, and cloud engineers * Terraform users (new or experienced) * Anyone curious about Infrastructure-as-Code but tired of boring examples * Minecraft fans who want to see it used in a totally unexpected way No prior Minecraft experience required—just curiosity and a willingness to learn infrastructure the fun way. Come for the blocks, stay for the Terraform. 🧱➡️📐 Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/azure-cbus-2026/

## Learn Infrastructure-as-Code (the FUN Way) — Through Minecraft 🎮☁️ **Joint Meetup: Azure CBUS × Columbus HashiCorp User Group** What if learning Terraform and Infrastructure-as-Code didn’t feel like a whitepaper… but more like a game? Join us for a joint Azure CBUS and Columbus HashiCorp User Group meetup where **Mark Tinderholt** \(Principal Architect\, Microsoft Azure \| HashiCorp Ambassador \| “The Azure Terraformer”\) shows how **Minecraft** can be used as a surprisingly powerful way to understand real-world Infrastructure-as-Code concepts. In this session, Mark will demonstrate how Terraform and Azure can be used to provision, configure, and manage Minecraft servers—while teaching the same patterns you’d use for production cloud infrastructure. ### What we’ll cover * Infrastructure-as-Code fundamentals using **Terraform** * Provisioning real infrastructure on **Azure** * Applying **IaC best practices** (immutability, repeatability, versioning) * How playful environments like Minecraft make complex concepts *click* * Why learning through experimentation beats click-ops every time ### Who should attend * Developers, platform engineers, and cloud engineers * Terraform users (new or experienced) * Anyone curious about Infrastructure-as-Code but tired of boring examples * Minecraft fans who want to see it used in a totally unexpected way No prior Minecraft experience required—just curiosity and a willingness to learn infrastructure the fun way. Come for the blocks, stay for the Terraform. 🧱➡️📐 Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

* Who Can Attend * The Central Ohio .Net Developers Group meetings are free and open to the public! All developers; professional, student, and hobbiest are welcome and encouraged to attend. * When we meet * The Central Ohio .Net Developers Group meets on the 4th Thursday of every month. * Where we meet * Please check our Meetup group link below for location details! * Join our Meetup Group * https://www.meetup.com/Central-Ohio-NET-Developers-Group-CONDG/

**New Dojo Location!** **Draft Day Columbus** 1130 Dublin Road Columbus, OH 43215 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 topic suggestions and people interested in presenting at our monthly meetings. To this end we've set up a survey form at [https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc](https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc)