Graph Theory

**The Stammtisch will be at “FLAX”** in Prenzlauer Berg. We don't have an agenda for this event. Instead, it's just an opportunity to meet other members in a nice social atmosphere, and to take a mid-week break. We try to watch out for new people, but if no one greets you, please just ask someone. We're quite a large group, so usually make up most of the people at the Bar. Don't be shy, we're a friendly group! This event repeats every two weeks.

Dieser besondere Deutschkurs ist für alle, die mit Spiel und Spaß ihr Deutsch verbessern wollen. Wir sind eine kleine Gruppe (max. 15 Personen) von Deutschlernern zwischen A2 - B2 und machen Theater-Improvisation auf Deutsch. Aber keine Angst - das kann jede/jeder lernen! Der Fokus liegt vorallem auf Sprechen und Verstehen, so daß du in Alltagssituationen spontaner reagieren kannst und mit dem Sprechen auf Deutsch flüssiger wirst. Ich bin sowohl Deutschdozentin als auch Theaterschauspielerin und entwickle diese Methode seit mehr als 10 Jahren. Der Kurs ist immer mittwochs und du bist herzlich willkommen, vorbeizukommen und uns kennenzulernen. Das 1. Mal kostet der Kurs 12 Euro zum Kennenlernen. Ein 10er Ticket kostet 160 Euro. Ein 5er Ticket 95 Euro und der Drop-in-Preis ist 20 Euro. Ich freue mich auf Euch. Bei Fragen kannst du mich gerne kontaktieren. liebe Grüße Nina

**Berlins großes Speed Dating Event (50-65 Jahre)** Hast du Lust, Singles in deinem Alter direkt persönlich kennenzulernen? Wie wäre es, wenn es ein Event gäbe, wo sich möglichst viele tolle Singles aus Berlin an einem Abend treffen? Mit Berlins großem Speed Dating Event hast du jetzt die Chance auf bis zu 12 einzigartige Dates an einem Abend! Sicher dir jetzt dein Ticket, bevor alle Tickets weg sind. [www.speeddating-xxl.de/speed-dating-berlin](www.speeddating-xxl.de/speed-dating-berlin)

[*Registration form required below*] **Interested in Japanese sword fighting or Japanese culture? Come join a trial and experience the traditional Samurai art at Katori Shintō-ryū in Schöneberg.** **Trial Fee**: **25€**/ session (2hr). Classes every Monday, Wednesday and Friday from 19:00 to 21:00. **!!SIGN UP HERE**: [Katori Shinto-ryū Berlin Sign-up (google.com)](https://docs.google.com/forms/d/e/1FAIpQLSeBt4A13VgnEcgQQ2PDaruthmYMRWineG4KtUCKsuC9KBsCUQ/viewform) Registration is required before your participation so that we can prepare enough training equipment. **Address**: Belziger Str. 25, 10823 Berlin. **No previous experience required!** The classes are in English and German. **Our website**: [Kenjutsu Berlin - Official school of Katori Shinto-ryu in Berlin (katoriberlin.org)](https://katoriberlin.org/) **Katori Shintō-ryū** is one of the oldest Japanese sword fighting traditions (koryū) still practised today and is recognized by the Japanese government as a cultural intangeable asset. The school was founded in the middle of the 15th century by Iizasa Chōisai Ienao at the Katori Shrine (Katori jingū) and has become the origin of numerous other martial arts schools over the course of its almost 600-year history. The training consists of the continuous repetition of fixed sequences of movements (kata) and includes the use of classic Japanese weapons such as the sword (iai-jutsu, battō-jutsu, ken-jutsu, ryōtō-jutsu, kodachi-jutsu), the long staff (bō-jutsu), the lance (naginata-jutsu) and the spear (sō-jutsu), as well as unarmed disciplines, tactics and spiritual aspects. **The Katori Berlin dojo** is the only official shibu of Otake Nobutoshi-shihan’s dojo Shinbukan in Germany and fully dedicated to the transmission and study of one martial tradition: Tenshinshō-den Katori Shintō-ryū. Through these efforts we aim to contribute to the cultural preservation of this martial tradition. The dojo has one officially appointed shidosha. **Our sensei**: Sebastian Graetz has been active in martial arts since 1997. After almost 15 years of taekwondo in Berlin, he started with Katori Shintō-ryū in Asia in 2014. Since then, he has studied in Japan with Ōtake Risuke-shihan and Ōtake Nobutoshi-shihan, and in Vietnam with Malte Stokhof-shihandai. In 2023, he received his Menkyo license and permission to set up a training group in Berlin the following year.

Hola chicos, Moin zusammen, lasst uns Deutsch und Spanisch sprechen und ein paar Bier zusammen trinken, die Idee ist einfach und gut :) Bitte bringt zumindest basis Deutsch oder Spanisch Kenntnisse mit! Vamos a hablar español y alemán y tomar unas cervezas, la idea es simple y buena jaja. ¡Por favor, ven por lo menos con un nivel básico de español o alemán! Danke, gracias!

Multilingual Singing,Piano & Songwriting Lessons in Charlottenburg, Otto Suhr Allee (also online) ENG DE LV Hi everyone, I’m a Berlin-based singer, songwriter, active performer, and former music school manager. I offer private singing and piano lessons in a relaxed and supportive setting in Charlottenburg (Otto-Suhr-Allee) or Online via Zoom. Lessons are open to all ages and levels – from complete beginners to advanced students. Genres: Classical, Rock, Pop, Modern Singing Lessons – breathing, vocal technique, tone development, and singing your favorite songs Piano Lessons – fundamentals, music theory, improvisation, and repertoire, Duration: 45 minutes Prices: Single lessons: 30 € Monthly package, regular weekly lessons: 125€ Languages: English / German / Latvian Location: Charlottenburg (Otto-Suhr-Allee) (online via Zoom) Availability: Wednesdays & Fridays Format: Individual 1:1 lessons The lessons are tailored to your goals in a friendly and motivating atmosphere. Feel free to send me a message here on via email: aliselessons@gmail.com [https://aliselessons.carrd.co/](https://aliselessons.carrd.co/)

**Berlin can be a tough nut to crack.** Sometimes you have your "one person" and you’re stuck in a bubble; other times, you’re the new kid on the block looking for your crew. This night is designed to break those bubbles and bridge the gap. "Bringing a friend? **Amazing.** Coming solo? **Also great.** \> Whether you’re rolling with your crew or flying solo\, you’re in the right place\. Our mission is to help you meet like-minded people and turn 'strangers' into 'Berlin besties.' **Friendly reminder**. Change ur attendance status if you cannot attend!

Zur Aktionswoche gegen Einsamkeit des [Kompetenznetzwerks Einsamkeit ](https://kompetenznetz-einsamkeit.de/aktionswoche)veranstalten wir von [platoniq.health](https://www.platoniq.health/de) ein kostenloses und unverbindliches Walk & Talk Format. Begleitet von kleinen wissenschaftlichen Einblicken und psychologischen Impulsen spazieren wir gemeinsam im Treptower Park und tauschen uns über das Thema Freundschaft und Einsamkeit aus. Eingeladen sind alle, die sich für das Thema soziale Beziehungen interessieren.

**If the event is fully booked, feel free to join us at the meeting point.** A participatory urban walk exploring memory, monuments, architecture, and hidden narratives in public space through observation, storytelling, and photography. We will move slowly along Karl-Marx-Allee, treating the city as a layered archive of perception. Through guided observation exercises and short reflective prompts, participants are invited to explore how urban space is read through personal experience, collective memory, and everyday traces. This is not a tour, but a collective reading of the city. No prior experience required. **Materials:** smartphone, paper, pen, optional audio recording **Participation:** Participation by voluntary contribution (5–15 € suggested) **Meeting point:** Karl-Marx-Büste (https://de.wikipedia.org/wiki/Strausberger_Platz#Karl-Marx-B%C3%BCste), Berlin ([Strausberger Pl. 12, 10243 Berlin](https://maps.google.com/maps?vet=10CAAQoqAOahcKEwi4l8-__c-UAxUAAAAAHQAAAAAQJg..i&sca_esv=080e5c4976d32afe&pvq=OhUweDA6MHgzOWMxOWFkN2Y5ZDg2ZTY&fvr=1&cs=0&um=1&ie=UTF-8&fb=1&gl=de&sa=X&ftid=0x47a84e3e065a95dd:0x39c19ad7f9d86e6)) **Collective Archive (optional contribution):** Participants are invited to contribute to a shared archive of the walk: Upload here: https://padlet.com/denkmallab/Building_Stories_Memory_Walk_Contributions Contributions are voluntary and may include photos, notes, or audio fragments from the walk and are part of a collective open research experiment

Join us for our second hike of the summer! We will start by meeting at (or at least boarding) the **10.40 RE2 (3112)** at **Ostkreuz** station, **Platform 1**. We will arrive at Lübben (Spreewald) at 11.25. *Note that if you miss this train, then the next one does not arrive until 11.56, so you will certainly miss us and won't be able to catch up!* The hike will go from Lübben to Schlepzig, along the canals and lakes of the beautiful Spreewald region. *(See photos for a rough route -- this is not necessarily accurate!)* The walk will be about 15 km and take about 4-5 hours. Bring lunch, snacks & water, comfortable walking shoes, and maybe even some sunglasses. We will stop a couple of places along the way, but will not stop long enough to order food, so bring your lunch! At the end of the walk, in Schlepzig, there is a Whisky brewery and a Biergarten. We will visit one or both. You can also get food at both. Then, we will take the 18:57 bus back to the starting point of Lübben Bahnhof. From there, we will catch the 19.34 RE2 (3129) back to Ostkreuz, arriving at 20.23. *(If you really want to, and if we get to Schlepzig in time, then you can also take the 16.52 bus to Lübben, then the 17.34 RE2 back to Berlin.)* **Note: We will reschedule this if the weather is too rainy. So definitely check back here before going!**

Every first Friday of the month (except January), people from diverse disciplines and cultures meet to share experiences, business contacts and wine. **AGENDA**: 1. Boarding time: 18.00-18:30 2. Intro-Round 1-2 min p.p. and "Book of the month" 3. Pause 4. Part 1: The Owner Trap: How to finally Step Out of Your Own Business by Milap Singh 5. Pause 6. Diskussion-Round finish the wine and network \*\*\* **DETAILS**: From Founder-Dependent to System-Driven - A2 - Hour Workshop Sprint Is your business running you, instead of the other way around? If you are a founder or small business owner who can't take a week off without things falling apart - this session is for you. In just two hours, we'll use a hands-on Service Blueprint sprint to map how your business actually works, identify hidden bottlenecks and build a clear plan to run it without you in the loop for every decision. No slides. No theory. Just sticky notes, honest conversations and a map of your business you can immediate act on. This workshop is for you, if you are: A service-based business owner (agency, studio, salon, clinic, coach) with a small team A founder who feels like the business would stop if you stepped away for two weeks A startup operator ready to move from "figuring it out" to build repeatable systems. Facilitated by Milap - Founder of Aspire Digital Design Agency, UX Researcher & service Designer based in Berlin. Connect with Milap on Linkedin: https://www.linkedin.com/in/singhmilap \*\*\* All events are free of charge. Please bring Wine/Snacks instead

Event name: **The Nudes of Istanbul** — Photo Exhibition **Opening / Fotoausstellungseröffnung** Start: Fri, Jul 3 19:00 End: Fri, Jul 3 21:00 **Location:** Die Akt Galerie Krossener Str. 34 10245 Berlin Germany **Description:** ENGLISH The Nudes of Istanbul is a group exhibition and accompanying English-language photobook presenting a fourteen-year collective fine-art nude photography practice developed in Istanbul and brought into public view in Berlin. Curated by Berlin-based photographer and curator Burak Bulut Yıldırım, the project brings together 14 Turkish photographers selected from a sustained curator-directed studio practice in Istanbul. Five of the participating photographers are women. The accompanying book includes texts by three model-authors writing from inside the practice: Zeynep Renda, Su Yeşil and Marmelat. The works were made in Istanbul over the last fourteen years through real bodies, real light, constructed sets, physical materials, model presence and explicit consent. The exhibition is not presented as a general exhibition about Turkey, but as a public record of a long-term collective photographic practice from Istanbul. This Meetup is for the opening evening. **Opening:** Friday, 3 July 2026, 19:00 **Exhibition dates:** 3–19 July 2026 Regular gallery hours: Friday–Sunday, 15:00–19:00 **Venue**: Die Akt Galerie Krossener Str. 34 10245 Berlin **Admission**: **Free** Project page: [https://burakbulut.org/the-nudes-of-istanbul/](https://burakbulut.org/the-nudes-of-istanbul/) DEUTSCH The Nudes of Istanbul ist eine Gruppenausstellung mit begleitendem englischsprachigem Fotobuch über eine vierzehnjährige kollektive Praxis künstlerischer Aktfotografie aus Istanbul, die in Berlin öffentlich sichtbar wird. Kuratiert von dem in Berlin lebenden Fotografen und Kurator Burak Bulut Yıldırım, bringt das Projekt 14 türkische Fotografinnen und Fotografen zusammen, die aus einer langfristigen, kuratorisch geleiteten Studiopraxis in Istanbul ausgewählt wurden. Fünf der teilnehmenden Fotograf*innen sind Frauen. Das begleitende Buch enthält Texte von drei Modell-Autor*innen: Zeynep Renda, Su Yeşil und Marmelat. Die Arbeiten entstanden in den vergangenen vierzehn Jahren in Istanbul: mit realen Körpern, realem Licht, konstruierten Sets, physischen Materialien, Modellpräsenz und klarer Einwilligung. Die Ausstellung versteht sich nicht als allgemeine Ausstellung über die Türkei, sondern als öffentlicher Einblick in eine langfristige kollektive fotografische Praxis aus Istanbul. Dieses Meetup bezieht sich auf den Eröffnungsabend. **Eröffnung**: Freitag, 3. Juli 2026, 19:00 Uhr **Ausstellungsdauer**: 3.–19. Juli 2026 Reguläre Öffnungszeiten: Freitag bis Sonntag, 15:00–19:00 Uhr **Ort**: Die Akt Galerie Krossener Str. 34 10245 Berlin **Eintritt**: **frei** Projektseite: [https://burakbulut.org/the-nudes-of-istanbul/](https://burakbulut.org/the-nudes-of-istanbul/)

Join us for the **Berlin DevOps Summer Meetup**: our last edition before the summer break! We're excited to be hosted by **Parloa** for an evening of interesting talks, discussions, and networking. There will be food and drinks provided, and plenty of time to connect with fellow DevOps enthusiasts. **📌 Please register at least 24 hours before the event.** We need to share the attendee list with the Parloa office in advance, and **spots are limited**. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Agenda** 18:30 Open Doors, Networking with Food and Drinks 19:00 Welcome words by Parloa and BLN DevOps team 19:25 **Running K8s with AI: Automating** **the SRE Lifecycle with Grafana MCP and GitLab** 19:50 **The Pipeline Was Green — AI Agents and CI Trust** 20:15 Short Break 20:30 **Managing Uninvited Guests: Securing Open Source Dependencies** 20:55 Networking 21:30 Closing ➡️ Interested in hosting an event? Fill out our [Call for Hosts](https://docs.google.com/forms/d/e/1FAIpQLScBpga8Yp-QAQt2lGskZWOThaKyQ_MbMbZaNcklgeXxqr5Vrg/viewform?usp=sf_link) and let's set up a meeting. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- *Christoph Ebeling* **Running K8s with AI: Automating** **the SRE Lifecycle with Grafana MCP and GitLab** What does it look like to run 30+ microservices, 8 databases, and a Kafka cluster almost entirely through AI agents? This talk walks through a practical demo of automating the full SRE lifecycle: from incident investigation to deployment validation, using Grafana MCP and the GitLab Agent Platform, and where humans still need to stay in the loop. *Serhii Vasylenko* **The Pipeline Was Green — AI Agents and CI Trust** We’ve spent years building CI/CD pipelines that tell us when code is "technically correct," but are they capable of telling an autonomous AI agent if a change is safe to apply? This talk explores a real-world incident where an AI-powered automation -- pairing Renovate with Claude Code -- successfully executed a "green" pipeline that broke a critical QA cluster for three days, how the team reacted, and how we evolved our vision toward the future of human-agentic collaboration with code. *Frithjof Hoffmann* **Managing Uninvited Guests: Securing Open Source Dependencies** Open source software is the ultimate neighborhood party, but what happens when an uninvited guest slips through the door? This talk digs into the messy reality of dependency hell and its role in software supply chain security: from typosquatting attacks to maintainer account takeovers, and the abandoned projects with known CVEs quietly living in your codebase rent-free.

This week we are discussing **Tove Ditlevsen:** Childhood, Youth, Dependency (The whole trilogy). We look forward to seeing you! If you have book suggestions, would like to vote on our next reads, or join us for additional activities, please ask someone at the meeting to add you to our WhatsApp group. Just a heads up: **The cafe only accepts card payments for amounts over €10**, so you may want to bring some cash for smaller orders. **Also, if you're unable to attend, please update your RSVP so that someone from the waiting list can take your spot.**

This presentation will be by Ben Iten, humanist chaplain and HCCO Board Member. Speaking on expressing Humanism values in American democracy. This meetings will be hybrid. You can meet us in-person or attend online. The formal presentation will start at noon. Food and drinks will be provided at the event. Feel free to show up a little bit early to hang out and talk. The Humanist Monthly Program is our longest running event and still a community favorite. In the old days it used to be called "Going to HCCO" and we still like to think of it as our flagship event. Join Zoom Meeting [https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1](https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1) Meeting ID: 878 3656 4953 Passcode: 760812 One tap mobile +19292056099,,87836564953#,,,,\*760812# US (New York) +13017158592,,87836564953#,,,,\*760812# US (Washington DC)

You can sleep in on the Sesquicentennial (observed), we’re shifting to the following Friday. But join the local UX community for a chat and some biscuits to catch up. If you were in CA for Figma Config, tell us all the lines and you can tell me how I can animate an SVG without coding it by hand, and why I’d even want to. Thanks to the team at Nationwide of supporting the group.

**Don’t miss your opportunity to learn from a duo with over 16 years of experience combined. During this demonstration event, you can expect to learn how to direct and guide your creative vision through lighting and communication to your model. We guarantee you will leave this event feeling more confident to try new lighting set ups to match up with your anticipated outcome. Finding the right way to express your vision is key to getting your model to pose accordingly, so we got you there too! To take this even further, think about signing up for a tutorial spot following the demonstration.** ***Note: this is a demonstration event only, you will not shoot your own images. However, if you bring your camera we can test it for compatibility with the studio lights.*** **Following the demonstration will be a tutorial/coaching event - sign up separately if you are interested at** https://calendar.app.google/ZcHb4CQB2rrV3U7j9 **Save and book both for $199 (discounted from $215; the discount will be applied on the Tutorial invoice).**

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/azure-cbus-2026/

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.