Rocks and Minerals

A small NEXUS gathering built around movement and natural conversation. **Important!** We’re moving our full event schedule to our website. 👉 For all upcoming events and details, visit: [https://nexuswerkstatt.com](https://nexuswerkstatt.com)

Join the dinner event and hangout this coming Friday, we are going to be in central Berlin, a short distance from Rosa-Luxemburg-Platz U-Bahn (subway) station. We are visiting a wonderful Georgian restaurant called Golden Fleece, which offers good food, cosy environment as well as fair prices. Menu also offers vegetarian choices. A nice area will be reserved for us. In case of interest for a further venue after the dinner, you can ask the event host for some tips. Come meet new friends and enjoy nice food in a relaxed and fun atmosphere, can't wait to see you all! **(Please note that spots are limited! Apply as early as you can)**

The "classical" bookswap is simple: * We meet in a café and put the book(s) we brought down on the tables. * We browse and discuss the books with one another while sipping coffee or hot chocolate, or eating cake. * We write our names down on any books we’d like to take home (post-its and pens provided). * At the end of the evening, negotiate any books that are contended and take a new-to-you book home! Books/happiness shared are books/happiness multiplied! A Bookswap is 10 times better than a Book Club because you can talk about ALL the books instead of just one! This is a great way to give your books a new home and make room for new books: that book you feel guilty for not having read even though it's been sitting on your bedside table for the last 5 years, the book you liked but didn't love, the book you loved so much you want everyone to read it, the book you somehow own three copies of, that book you absolutely hated even though everyone else loves it, and so on. Moreover, you will meet fellow readers, get a new book or two, and several book recommendations. We’ve often had readers experience books they wouldn't normally buy and enjoy it. GROUP EXPECTATIONS for PLEASANT SWAPPING * Please bring a book! It's not that you bring one you take one, but do try your best to bring something. * Books stay on the tables, open for sharing, until you are ready to leave so that everyone can have a look. We are notably not first come first serve. Please wait until you are leaving to bag the book. * If two or more people want the only copy of a book, negotiate. Maybe one of you reads it first and then gives it to the others. Or perhaps they have found another book instead. Or leave it to fate and toss a coin. The best part: now you have found somebody whose taste you can really admire. In any case, please don't walk away with a book with several names on it without letting the others know. These negotiations are fun and easy, so don't shy away from a book because there's already a name on it, and feel free to put your name on as many books as you find interesting. It's not that you bring one you take one; you may take as many as you can negotiate. * Political discussions with consent: make sure the people you are talking to would like to have a political discussion with you. * Please respect this space as first and foremost a community for connecting readers over their love of books and reading, stories, and narratives of all sorts. Please be respectful of tastes and opinions. * If something is bothering you, please reach out to the organizers, and we'll do our best to resolve it. * Lastly, don't expect your book back. It will find a new home. If you love it, let it go. Major LANGUAGES (and genres) of this meetup: English, German, French, Spanish, Italian; Fiction, Non-Fiction, Serious Reading, Light Fun, “classics", Krimis, Booker winners, Sci-Fi, Fantasy, Self-Help and more. You never know who can read what languages, and there's no accounting for taste. We are a delightful and international group of readers. We look forward to swapping with you!

Discover yourself and connect with others in this dynamic, playful, and creative monthly course! The goal is to foster self-awareness, build interpersonal connections, and release mental blocks. Each session combines Taichi/Qigong-inspired movements, expressive improvisation, experimental drawing exercises, and introspective group interactions. Shake your body, unleash your creativity and leave feeling energized, inspired, and more connected. **All Levels Welcome**. This course is suitable for people aged 16+ who can speak English and/or German. No prior knowledge of drawing or movement techniques is required - the focus is on personal discovery and shared experience, not technique. ​ **What to bring:** * Comfortable clothes for gentle movement **You can join this event for 15 € / reduced 11 € / donate what you can**, or via [URBAN SPORTS CLUB](https://urbansportsclub.com/de/venues/fincan-neukolln) **Stay with us:** Every Friday at 7:30 pm you can enjoy a delicious vegan meal at the Küfa "Küche für Alle" after the class for a donation! **Your instructor:** Hi, I'm [Juan-Carlos Rosa-Casasola](https://www.juancarlosrosacasasola.com/) (Juancar/he/him), a Berlin-based artist and art instructor offering painting and drawing classes for adults who want to explore their creativity in a fun, supportive environment. ​ My workshops are for all levels - ideal for beginners or anyone who wants to reconnect with their creative side. My warm and playful teaching style might help you to let go of perfectionism, enjoy the process, and grow your creative confidence — step by step.

Liebe Deutschlernende, Das nächste Sprachcafé findet am **24.04.** von **15:30 bis 17 Uhr statt.** Das Thema: Wird vor Ort bekannt gegeben. Wir freuen uns auf euch!

We invite you to join us for a shared cinema experience followed by an open discussion. Together we will watch *“The Exorcist”*, one of the most iconic and chilling horror films ever made. Directed by William Friedkin, this legendary 1973 classic follows a mother who becomes increasingly alarmed by the disturbing transformation of her 12-year-old daughter. As strange and terrifying events escalate, a troubled young priest—grappling with his own crisis of faith—is called upon to confront a force beyond comprehension. What unfolds is a deeply unsettling story about belief, fear, and the battle between good and evil. This special screening is part of *The DMP Friday Night Fright Show*, a bi-weekly celebration of horror cinema featuring vintage trailers, trivia, and grindhouse-style surprises—making it a unique experience for fans of the genre. **Movie details:** 🎥 *THE EXORCIST* 🇺🇸 USA, 1973 🎞️ Duration: 132 min 🎬 Director: William Friedkin 👩‍🎤 Cast: Linda Blair, Ellen Burstyn 🗣️ Language: English – OmU (Original with subtitles) 📅 Friday, April 24, 2026 🕒 19:30 📍 Kino 2, Babylon Kino, Rosa-Luxemburg-Straße 30, 10178 Berlin 🎟️ Tickets: Please buy your ticket online: [BABYLON in Berlin - The Exorcist](https://babylonberlin.eu/film/1784-the-exorcist) 👉 Join our WhatsApp group to chat about the film and coordinate meeting at the café! [Group Chat](https://chat.whatsapp.com/J1PU7iWTNeBLQ4oRz27grV) ⚠️ Note: This is a WhatsApp group link. If it doesn’t open in the Meetup app, please copy & paste it into your browser or open it in the WhatsApp app. After the screening, We will then go together to a nearby café to continue the experience with an informal discussion, giving everyone a chance to share thoughts about the film and connect with other cinema enthusiasts.

Join our in-person meetup on April 24th to hear talks from experts on cutting-edge topics across AI, ML, and computer vision. **[Register to reserve your seat.](https://voxel51.com/events/berlin-ai-ml-and-computer-vision-meetup-april-24-2026)** Space is limited! **Date, Time and Location** Apr 24, 2026 5:30 PM - 8:30 PM [MotionLab](https://motionlab.berlin/) Bouchéstraße 12/Halle 20 12435 Berlin **Kaputt: A Large-Scale Dataset for Visual Defect Detection** We present a novel large-scale dataset for defect detection in a logistics setting. Recent work on industrial anomaly detection has primarily focused on manufacturing scenarios with highly controlled poses and a limited number of object categories. Existing benchmarks like MVTec-AD (Bergmann et al., 2021) and VisA (Zou et al., 2022) have reached saturation, with state-of-the-art methods achieving up to 99.9% AUROC scores. In contrast to manufacturing, anomaly detection in retail logistics faces new challenges, particularly in the diversity and variability of object pose and appearance. Leading anomaly detection methods fall short when applied to this new setting. To bridge this gap, we introduce a new benchmark that overcomes the current limitations of existing datasets. With over 230,000 images (and more than 29,000 defective instances), it is 40 times larger than MVTec and contains more than 48,000 distinct objects. To validate the difficulty of the problem, we conduct an extensive evaluation of multiple state-of-the-art anomaly detection methods, demonstrating that they do not surpass 56.96% AUROC on our dataset. Further qualitative analysis confirms that existing methods struggle to leverage normal samples under heavy pose and appearance variation. With our large-scale dataset, we set a new benchmark and encourage future research towards solving this challenging problem in retail logistics anomaly detection. The dataset is available for download under [https://www.kaputt-dataset.com](https://www.kaputt-dataset.com). *About the Speaker* [Sebastian Höfer](https://www.linkedin.com/in/sebastian-h%C3%B6fer-891178121/) is an Applied Science Manager at Amazon Fulfillment Technologies & Robotics, leading machine learning and computer vision research for large-scale robotics and warehouse automation. He received his PhD from the Robotics & Biology Lab at TU Berlin, focusing on Sim2Real transfer and robotic perception. His recent work, “Kaputt: A Large-Scale Dataset for Visual Defect Detection” (ICCV 2025) [37], established a major benchmark for industrial anomaly detection, reflecting his expertise at the intersection of academic research and real-world deployment. **Data Foundations for Vision-Language-Action Models** Model architectures get the papers, but data decides whether robots actually work. This talk introduces VLAs from a data-centric perspective: what makes robot datasets fundamentally different from image classification or video understanding, how the field is organizing its data (Open X-Embodiment, LeRobot, RLDS), and what evaluation benchmarks actually measure. We'll examine the unique challenges such as temporal structure, proprioceptive signals, and heterogeneity in embodiment, and discuss why addressing them matters more than the next architectural innovation. *About the Speaker* [Harpreet Sahota](https://www.linkedin.com/in/harpreetsahota204/) is a hacker-in-residence and machine learning engineer with a passion for deep learning and generative AI. He’s got a deep interest in VLMs, Visual Agents, Document AI, and Physical AI. **Most AI Agents Are Broken. Let’s Fix That** AI agents are having a moment, but most of them are little more than fragile prototypes that break under pressure. Together, we’ll explore why so many agentic systems fail in practice, and how to fix that with real engineering principles. In this talk, you’ll learn how to build agents that are modular, observable, and ready for production. If you’re tired of shiny agent demos that don't deliver, this talk is your blueprint for building agents that actually work. *About the Speaker* [Bilge Yücel](https://www.linkedin.com/in/bilge-yucel/) is a Senior Developer Relations Engineer at deepset, helping developers build agentic AI apps with Haystack. Passionate about AI, she makes complex concepts approachable through hands-on tutorials, both online and at real-life events. **Operationalizing Computer Vision for Overhead Lines: Beyond the Demo** At first glance, visual inspection of high-voltage power lines seems straightforward: collect imagery, run one or two AI models, and report the findings. In practice, moving beyond a proof of concept reveals a range of issues that can make or break a campaign. Common concerns include data quality and coverage, scarcity of the most relevant cases and abundance everywhere else, variations in pylon geometry and asset types across regions, calibration and GIS alignment challenges, and a long tail of edge cases that emerge in real-world operations. This talk introduces Siemens Energy’s end-to-end overhead line inspection solution and shares key learnings from inspecting more than 10,000 km of power lines for real customers across several continents. We will show how raw 2D/3D data is transformed into structured information, delivering insights into asset inventory as well as defects, and supporting maintenance and planning decisions for critical infrastructure. The focus is on the combination of algorithmic building blocks and scalable processing, designed for robustness and consistency at scale, where even low error rates can become operationally significant. *About the Speaker* [Stefan Wakolbinger](https://www.linkedin.com/in/stefan-wakolbinger-aa0ba874/) is the Development Team Lead for AI & Analytics at SIEAERO, Siemens Energy's digital powerline inspection service. He leads the development of cutting-edge AI and analytics solutions that transform aerial powerline inspection through multi-sensor technology. His team creates digital twins of powerline infrastructure, automates fault detection, and monitors vegetation management—making powerline inspection safer, more precise, and more efficient. Stefan has been driving innovation in this role since September 2022. **Search your video library like a database** Drop in YouTube URLs or upload files and query content four ways: exact keyword matching, semantic search across transcripts, visual scene search via SigLIP2, and LLM-generated answers that synthesise across segments. [Paras Mehta](https://www.linkedin.com/in/pmehtaeu/) is a Berlin-based AI engineer and CTO/co-founder of Sylby, a language learning app he built from scratch, reaching 10,000 users and raising €350K. Previously: data scientist at Motionlogic, senior software engineer at Volkswagen, a PhD from Freie Universität Berlin, and a visiting stint at Cambridge. He now works as an AI engineer at HPI's AI Service Centre.

Get to Know Your Rock Community & Connect! Are you a musician, or simply curious about Berlin’s rock scene? Either way, you’re warmly invited to join us for a drink, great conversations, and new connections. The Rock Music Meetup brings together people from all walks of life to talk about the latest in the music scene, share their talents, exchange ideas, and swap stories. Whether you’re an experienced musician, an aspiring artist, or just a rock enthusiast, you’re welcome to join us for a relaxed and inspiring evening. Our hosts at BRML will give you a warm welcome and introduce you to Berlin’s vibrant rock community. Come as you are, bring your passion for music, and don’t miss out! 🎸! **Location:** Kastanienallee 85, 10435 Berlin **Start time:** 19:30 **Event details:** Free entry – just pay for what you eat or drink **Join us on Telegram:** [https://t.me/+2cpiSI3G2SNlOGMy](https://t.me/+2cpiSI3G2SNlOGMy) **Follow us on Facebook:** [https://www.facebook.com/berlinrockmusiclovers](https://www.facebook.com/berlinrockmusiclovers) \*Participation is free. If you’d like to support the group, there’s a small optional €1 contribution to help cover Meetup costs. You can contribute via PayPal: aliselessons@gmail.com See you there, Alīse [www.risingalma.com](www.risingalma.com) musicalityse@gmail.com Contact me for singing or piano classes: aliselessons@gmail.com

Silent Book Club is a group of book lovers who enjoy reading together in public. All books and all readers are welcome. (Kindly RSVP 'yes' only if you can make it, so we can save a seat for you and our fellow readers on the waitlist!) This page-turning party will unfold in the Café (1st floor) at the Bode Museum. There's no entrance fee, but please order at least one item from the cafe and don't bring any outside drinks :) No quizzes, no pressure, no assigned books - just a group of book-loving souls basking in the beauty of silent reading. **Our thrilling agenda:** 10:30 am - 11:00 am - Arrivals, ordering drinks/food (social time) 11:00 am - 12:00 pm - The Great Quiet Reading Hour (where silence is the star) 12:00 pm - 13:00 pm - Optional socializing, share your reading adventures or just keep exploring the pages Stay for lunch, and who knows? You might just find your next favorite book over a pizza. NB: If you plan to go for lunch, please consider bringing cash, as some restaurants only accept card payments after a certain amount.

Have you always wanted to learn bouldering but never had the right company? Or are you an experienced boulderer who just wants to find boulder-buddies? If yes, this is the right event for you. We are going to meet inside "urban apes Basement Boulderstudio", close to S Anhalter Bahnhof, also not far from Potsdamer Platz. If you have never been there, you will need to sign up with them, which will take a bit of time. After that, **you can find us on the couches near the lockers (not in front of the reception), next to a red smiley**. When you enter the actual gym, enter the hall by turning left immediately - you are walking towards them. We will start warming up around 11:10, so everyone has enough time to arrive and get changed before that. ***\*\*\**** *Spots are limited, so please update your RSVP at least 24 hours in advance if you won't be joining. **NO-SHOWs ARE NOT COOL \*\*\**** We enter the gym at 11:00, if you are late, you will need to look for us inside. IMPORTANT: they only accept cards as a payment method. No cash. One day ticket will cost you 13,90 EUR (10,90 EUR if you are a student, free if Urban Sports Club). **What to bring: well, first of all, a good mood.** But you could also bring * climbing shoes if you have any. If not, you can rent them there, no worries. They cost 3,50 EUR. * a lock (for the locker). * chalk. You won't need that if you are a beginner. Renting is possible. * water. * extra clothes. It's quite chalky there and humans sweat, not the best mix, don't you think? :D Please, note: the organizer is not responsible for anything, including injuries. A basic introduction will be provided.

!!! Note the corrected meeting spot, which for some reason keeps getting changed in the event: [https://maps.app.goo.gl/L8SuKJxoLLa8hXCdA](https://maps.app.goo.gl/L8SuKJxoLLa8hXCdA) \-\-\- **Mandarin Learner Meetup in Berlin! *(Free resources below)*** **Learning Mandarin is like trying to tame a** 🐲**.** It can feel frustrating, but you’re not alone. **[WeHanzi](wehanzi.com)** is here to support! **[WeHanzi](wehanzi.com)** is an independently built iOS app created by Ben and Gina. We've turned the entire learning experience into ***Comprehensible Input* through both simplified and traditional manga** with support for **Zhuyin**, **Pinyin**, **flashcards**, **audio**, **direct translation**, an integrated dictionary. We also specifically design region-specific language to reflect real-life usage in both **mainland Chinese Mandarin** and **Taiwanese Mandarin**, allowing you to naturally compare and explore the differences between the two, so you don’t end up saying something that makes perfect sense in Beijing, but gets you funny looks in Taipei 😏. Now, together with our good friend Matthias from **[Gemeinsam Chinesisch & Deutsch lernen](https://www.meetup.com/gemeinsam-mandarin-chinesisch-und-deutsch-lernen/events/308204343/?eventOrigin=group_upcoming_events),** we’re inviting you to our very first **in-person Mandarin Learner Meetup in Berlin** together! All levels are welcome, from beginners to advanced learners. Just come hang out, share your stories, laugh at our tone mistakes! As a community, we can learn from each other and turn Mandarin into a piece of cake! 🍰 **Come and join us!** 📱 App: [Wehanzi.com](https://wehanzi.com/) 📸 Free bite-sized resources: [Instagram](https://www.instagram.com/wehanzi/) 📚 More free tools: [wehanzi.app/menu](https://wehanzi.app/menu) **📍ABOUT THE MEETING SPOT** Please note that we will meet HERE, on the 3 wooden tree benches slightly left of the main entrance gate of Tempelhofer Feld: [https://maps.app.goo.gl/L8SuKJxoLLa8hXCdA](https://maps.app.goo.gl/L8SuKJxoLLa8hXCdA) We'll meet at the meeting spot first and then - depending on the weather - decide as a group to either walk around Tempelhofer Feld or go to a closeby restaurant to warm up and chat. So please be on time. Or if you are running late or can't find us, just give Matthias a call on 0176-21984345. See you all soon, Gina & Matthias

**Combining a variety of TopRock break dance moves in the format of HIIT training, this class will be like no other you have taken! Specifically created with non-break dancers in mind, this class is fun, engaging and totally beginner friendly!** 🤸‍♀️ *What exactly is TopRock you might be asking?* Toprock is the **standup part of breakdance**. When break-dancers are showing their skills, they will often start with toprock. Beginners often find toprock to be easier than other elements of [breaking](http://%5Bhttps//www.mygrooveguide.com/dance-info/breaking/what-is-breaking%5D(https://www.mygrooveguide.com/dance-info/breaking/what-is-breaking) "breaking"), because it is done standing up. So this will be a great introduction to breaking for beginners or those wishing to expand their breakdance skills. **Taught by 3x Breakdance World Champion and Choreographer of Flying Dreams show at Wintergarten, Bboy Lou.Ease of the Flying Steps! He has also worked with contemporary dance companies such as Akram Khan Company, Wang Ramirez and Constanza Marcras / Dorkypark.** **📋 Agenda:** * *Check in will begin 15 minutes prior to class*. Please arrive on time to ensure class starts at the designated time. **💸 Cost**: *Donation based* **to help with maintaining the venue and group maintenance costs.** **👉 Other Things to Note:** * *Class will be in English/German* * *Please make sure to wear comfortable clothes you can move and sweat in. Shoes should also be comfortable, although they are not mandatory. Feel free to dance barefoot or in socks if you like.* * *Bring a water bottle to refresh between sequence breaks.* * *Changing room/clothes storage and toilets provided on site free of charge.* * ***If you RSVP and are unable to make it, please be considerate and cancel 24 hours in advance to make space for someone else.***

***Discover the mystical sunken birch forest, the valley and its unspoilt nature while hiking along river Briese.*** **HOW DO I JOIN THIS EVENT?** Click on link below to get complete info and to sign up for this event by getting your ticket. [https://urbanaturetravel.com/event/briesetal-fairytale-forest-25apr2026](https://urbanaturetravel.com/event/briesetal-fairytale-forest-25apr2026) **SPECIAL OFFER FOR NEW USERS** * 10% New User Discount using promo code: **MEETUP10** * Valid for this trip or any other trips available on our website. **WHY GO?** The Briesetal is one of Brandenburgs most scenic valleys, formed by river Briese. The quiet nature preservation area is home to mischievous beavers whose dams created a sunken birch forest. The valley is still dominated by unspoilt nature, seemingly untouched by humans. It's only a 40 minute train ride north of Berlin, making it the perfect day trip getaway from the city's hustling. Following the meandering river we traverse the mystical forest, walk on wooden planks through moors and marshes and explore natural habitats and endemic wildlife. On this hike, immerse yourself into nature’s wonder! Have you ever observed the tiny details of the outdoors? Such as the intricate veins on the back of a leaf? Or the delicate edges of flowers’ petals? Or the movement of a cheeky squirrel? On this walk, you will have the chance to truly connect with the natural world around you. No experience or preparation is needed, just your curiosity. You will be guided through every step of the way. **TRIP DETAILS** **Distance:** 13 km walking, 7 hours from start to closing, multiple break times **Hiking Difficulty:** Easy – walking on marked paths / dirt roads, mostly flat terrain, relaxed pace **Kid Friendly:** Yes **Pet Friendly:** Yes **What is included?** * Community Leader and Guide for the entire duration. * Guided hike. * Access to Google photos album dedicated for this trip for sharing all your amazing pictures and videos from the trip. * Access to a WhatsApp group for the confirmed participants. **Note:** Please contact us immediately if you do not have WhatsApp and we can make alternate arrangements from our end to ensure you do not miss out on any communication. **FOR FUTURE TRIP UPDATES:** Please do join our WhatsApp / Telegram channel for updates about our future trips including possible early bird discounts, contests etc. 1. [WhatsApp Channel](https://go.unt.global/travelgroup) 2. [Telegram Channel](https://t.me/urbanaturetravel)

Private Group. Closed to the Public Knowing ourselves and understanding our abilities is the first step toward wielding our gifts with control and accuracy. In subsequent classes we will verify and hone our talents with activities and discussion. These are hands-on workshops and participation is expected. The goal of our series will be to develop expertise in areas of particular interest such as mediumship, channeling, divination, healing and, etc.. Our ultimate directions will be determined by class members as we evolve. I look forward to sharing and discovering with you. - Cynthia

**How to take control of your subconscious and harness its power!** Join us for an eye-opening lecture where the speaker will break down complex ideas in a clear and practical way. You’ll gain insights into: ✅ The true definition of the subconscious ✅ How it generates unwanted emotions ✅ Its real purpose and function ✅ What determines the pressure it exerts on you And the most important topic: **How do you take control of your subconscious!** But this isn’t just another lecture where you sit and listen passively. It’s interactive and engaging—you can ask questions at any time. 📅 Reserve your spot now! Seats are limited, so don’t wait too long to sign up. Location: 1266 Dublin Rd, Columbus, OH 43215 Hosted by the Hubbard Dianetics Foundation

Communication is everything in life You are only as successful as your ability to communicate. \- What if you could confidently talk to anyone? \- What if you had the ability to calmly control every conversation? \- What if you could close that sale\, ask for that date\, make new friends\, repair problematic relationships\, get that raise\, or effortlessly express any idea with confidence? You can! The secret to success relies on your ability or inability to effectively communicate. Attend a free seminar and gain a better ability to communicate. Hosted by the Church of Scientology of Central Ohio 1266 Dublin Road, Columbus, OH 43215 For more information, contact Rhiannon, the Event Host at 614-221-5024

**DINNER AND MUSIC**! Pubs, breweries, and American eateries often host local bands playing popular hits, country, or rock offering a nice ambiance for socializing and diverse food and drink menus. *Tonight we'll check out [TIPTON TAVERN](https://www.pizza-cottage.com/locations) (inside Pizza Cottage Lewis Center).* Family-friendly casual [pizzeria](https://www.pizza-cottage.com/menu) for pizzas plus salads, wings and subs. We'll meet in the bar area, where the live music is set up. You're welcome to stay late, if you like. *Tonight's band:* Shucking Bubba Acoustic! **Live music starts at 6pm**.

5th annual Earth Day Celebration! This year (2026) the Celebration is scheduled for April 25th with activities running from 10am-2pm. This is a non-ticketed event. Everyone is welcome! We will have food trucks, Birds of Prey, kids crafts, live music, raspberry plants, apple trees, and of course NATIVE PLANTS! Where: Lynd Fruit Farm, 9399 Morse Rd, Pataskala Ohio 43062 Time: Activities will be from 10am- 2pm. The Market will remain open until 5pm.