Decentralized Systems & Applications

Hello everyone, Take a break from your week to make progress on your reading in good company, then join a relaxed chat about what everyone's been reading. 🗓️ Schedule 14:00 \- 14:30 \| Arrive & Introduction round 14:30 \- 15:30 \| Silent Reading Hour 15:30 \- 16:30 \| Chat & Discussion 📍 How to Find Us **Napraforgó terem** (Sunflower Room). Look for signs throughout the building showing which room is where. Exact location details will be posted in the comments when we arrive. ✨ Voluntary Contributions Booking our own space costs \~15,000 HUF. We use a voluntary contribution model (suggested 500-1000 HUF per person, but completely optional). There'll be a Revolut QR code and cash box at the event. All funds go to the venue, with any extra covering Meetup costs. Whether you're a regular or first-timer, you're welcome. See you there! 📌 **[Goodreads](https://www.goodreads.com/group/show/1271292-budapest-silent-book-club)**[ ](https://www.goodreads.com/group/show/1271292-budapest-silent-book-club)(monthly book club voting) 📌 **[Facebook Page](https://www.facebook.com/people/Budapest-Silent-Book-Club/61567388151835)** (previous books read in sessions) 📌 **[Silent Book Club](https://silentbook.club/pages/about-us)** (the idea itself, where did it come from?) 📌 **[Contribution Tracker](https://docs.google.com/spreadsheets/d/1C_N9CN_pQO5aUYezqzQW4GS7pr8IfplchwG8-ruZ19g/edit?usp=sharing)** (spreadsheet for our private room experiment)

Hey everyone, here we go again with our next event on **Sunday**!. Leon will host and please follow his instruction. IMPORTANT NOTE: Free Cancellation is only until Saturday, 18:00. If you cancel after that without noticing the host, You must pay the fee to compensate the court and shuttlecock. Also note that due to Meetup Organizer Subscription fee is increased significantly, The on-duty host will add an extra fee based on the number of attendees. Please do not come if you are in the WAITLIST. Level of Expectation: Beginner - Intermediate. Please watch the video if you are first timer of playing Badminton : https://youtu.be/tAS7rOKtpgQ?si=IDm9UEV55nUzU5Oc Venue: Tüskecsarnok Sportscentre: 1117 Budapest, Hevesy György út, Sportscentre Map: http://tuskecsarnok.hu/wp-content/uploads/tuske-map-1-full.png Look for #7 on the map. More info in the "How to find us" section of the Meetup event. Our venue does not provide rackets, which means that you'll have to bring your own racket! Should you get lost, feel free to text me on Meetup. There are 3 courts booked for us for 1,5 hours from 12:00 till 13:30. Showers and changing rooms are available! Extra Note Attendance fee: We will divide the court fee by the number of people showing up. However, in certain circumstance, when the number of people cannot is less than and equal to 10, The Host deserve to contact the people who canceled after the time designated cancellation time. The expected fee is usually around 2500-3000 HUF per person. Payment is done at the court. or The host will reach you out via meetup chat. !!!Last but not least: if you have signed up but cannot make it for some reason, just take a minute to sign off, RSVP = no. This is to help those who are on the waiting list and want to play. The cancellation time with non-sick reason should be 18 hours before the session. In case you are not feeling well on the session day, please kindly contact the host via comment or privately message him/her with the direct message feature maximum 3 hours before the session starts. Looking forward to seeing you! cheers, Yoga Liability: The participation happens on own risk. There is no liability for any accidents, thefts or damages from the organizer.

**Survival Practice · Adult Group** 📅 **Sunday, February 1** What will you do if your phone dies, GPS fails, or the trail disappears? This practice is about **real navigation**, not theory. We go into the forest and **learn how to find our way out** — calmly, confidently, and without panic. ### What you’ll learn: ✔ How to determine your location using a **map and compass** ✔ How to choose the right trail — or move **without a trail at all** ✔ How to navigate terrain instead of following apps ✔ How to reach people and roads **without knowing your exact direction** These skills make every hike safer — and in critical situations, they can explain the difference between stress and control. *** 🥾 **Route:** \~ **17 km** of forest terrain ⬆️⬇️ **+690 / –690 m elevation** Physically challenging, mentally empowering. *** 📍 **Start & finish:** Letkés village, **Sport utca bus stop** [https://maps.app.goo.gl/AztaUtKqpiqD5y4m8](https://maps.app.goo.gl/AztaUtKqpiqD5y4m8) 🕘 **Meeting time:** 09:30 on site 🚆 Optional group travel from **Nyugati at 08:00** ⏰ Return after **16:00**, arrival at Nyugati around **17:55** *** 💶 **Participation fee:** Early payment (Friday until 20:00): **18,000 HUF** Saturday until 14:00: **20,000 HUF** Standard: **22,000 HUF** 🚌 Transport not included. 🎒 **What to bring:** * 1–1.5 L of water * Solid lunch * Comfortable clothes & shoes you can get dirty (mud guaranteed 😉) * Wind/rain jacket * Warm layers + hat * Optional: compass and **Börzsöny map** (Tape the fold lines. I’ll have a map too, but your own is better.) *** 🧠 **This is not a walk.** **This is a skill you keep for life.** Whatsapp: +36305183643 , Telegram: @Rudra_AM , Facebook: [https://www.facebook.com/leonid.syrovyatkin](https://www.facebook.com/leonid.syrovyatkin)

**Note:** *We receive bookings from many different platforms, so you can expect a lively group with people joining from all over the world. When you join this tour, you’ll be part of a fun, social crowd ready to explore the city together.* **Discover the Heart of Budapest — History, Culture & Hidden Stories** Step into the soul of Hungary’s capital with The Original Budapest Walking Tour, a perfect introduction to the city’s fascinating history, vibrant architecture, and rich culture. Whether it’s your first time in Budapest or you’re returning to see it from a local’s perspective, this tour offers the ultimate way to truly understand what makes the city so special. Led by passionate local guides, this walking tour takes you on a journey through both sides of the Danube — Buda and Pest — exploring their contrasts and connections. From royal palaces and heroic squares to ruin bars and romantic river views, every stop reveals a story that shaped Budapest’s identity. Get insider tips, local anecdotes, and a deeper appreciation for the people and events that made this one of Europe’s most enchanting capitals. **🌟 Highlights** * Explore Buda and Pest, the twin cities that form Budapest * Visit famous landmarks like St. Stephen’s Basilica, Chain Bridge, and Buda Castle * Learn about Hungary’s communist and royal past from expert local guides * Discover hidden gems and local hangouts off the beaten path * Enjoy a fun, engaging, and budget-friendly way to explore the city **✅ What’s Included** * Professional local tour guide * Comprehensive walking tour covering key historical and cultural sites * Insider recommendations for food, nightlife, and attractions * Small group experience for a more personal touch

**Note:** *We receive bookings from many different platforms, so you can expect a lively group with people joining from all over the world. When you join this tour, you’ll be part of a fun, social crowd ready to explore the city together.* **The Original Budapest Alternative Street Art & Jewish Tour 🎨✡️** Step off the beaten path and uncover Budapest’s vibrant street art culture and rich Jewish heritage on this immersive walking tour. Led by passionate local guides, this experience dives deep into the creative soul of Budapest’s 7th District—the historic Jewish Quarter—where history, art, and urban culture collide. Stroll through colorful streets filled with murals, hidden galleries, and cultural hubs, while learning how the city’s Jewish roots and post-communist era inspired a wave of artistic freedom. From synagogues and memorials to alternative bars, design studios, and community spaces, every stop tells a unique story about resilience, identity, and creativity. Whether you’re an art lover, a history buff, or a curious traveler, this tour offers a new perspective on Budapest’s most dynamic neighborhood. **🌟 Highlights** * Discover Budapest’s underground art scene and creative community * Explore the Jewish Quarter, its landmarks, and living heritage * See murals, installations, and street art masterpieces * Visit local galleries, ruin bars, and design spaces * Learn how Budapest’s history shaped its modern identity **✅ What’s Included** * Professional local guide * Walking tour through the Jewish Quarter & alternative neighborhoods * Insights into art, history, and local culture * Small-group experience for an authentic connection

Hello everyone, Take a break from your week to make progress on your reading in good company, then join a relaxed chat about what everyone's been reading. 🗓️ Schedule 14:00 \- 14:30 \| Arrive & Introduction round 14:30 \- 15:30 \| Silent Reading Hour 15:30 \- 16:30 \| Chat & Discussion 📍 How to Find Us **Napraforgó terem** (Sunflower Room). Look for signs throughout the building showing which room is where. Exact location details will be posted in the comments when we arrive. ✨ Voluntary Contributions Booking our own space costs \~15,000 HUF. We use a voluntary contribution model (suggested 500-1000 HUF per person, but completely optional). There'll be a Revolut QR code and cash box at the event. All funds go to the venue, with any extra covering Meetup costs. Whether you're a regular or first-timer, you're welcome. See you there! 📌 **[Goodreads](https://www.goodreads.com/group/show/1271292-budapest-silent-book-club)**[ ](https://www.goodreads.com/group/show/1271292-budapest-silent-book-club)(monthly book club voting) 📌 **[Facebook Page](https://www.facebook.com/people/Budapest-Silent-Book-Club/61567388151835)** (previous books read in sessions) 📌 **[Silent Book Club](https://silentbook.club/pages/about-us)** (the idea itself, where did it come from?) 📌 **[Contribution Tracker](https://docs.google.com/spreadsheets/d/1C_N9CN_pQO5aUYezqzQW4GS7pr8IfplchwG8-ruZ19g/edit?usp=sharing)** (spreadsheet for our private room experiment)

Hey everyone, here we go again with our next event on **Sunday**!. Leon will host and please follow his instruction. IMPORTANT NOTE: Free Cancellation is only until Saturday, 18:00. If you cancel after that without noticing the host, You must pay the fee to compensate the court and shuttlecock. Also note that due to Meetup Organizer Subscription fee is increased significantly, The on-duty host will add an extra fee based on the number of attendees. Please do not come if you are in the WAITLIST. Level of Expectation: Beginner - Intermediate. Please watch the video if you are first timer of playing Badminton : https://youtu.be/tAS7rOKtpgQ?si=IDm9UEV55nUzU5Oc Venue: Tüskecsarnok Sportscentre: 1117 Budapest, Hevesy György út, Sportscentre Map: http://tuskecsarnok.hu/wp-content/uploads/tuske-map-1-full.png Look for #7 on the map. More info in the "How to find us" section of the Meetup event. Our venue does not provide rackets, which means that you'll have to bring your own racket! Should you get lost, feel free to text me on Meetup. There are 3 courts booked for us for 1,5 hours from 12:00 till 13:30. Showers and changing rooms are available! Extra Note Attendance fee: We will divide the court fee by the number of people showing up. However, in certain circumstance, when the number of people cannot is less than and equal to 10, The Host deserve to contact the people who canceled after the time designated cancellation time. The expected fee is usually around 2500-3000 HUF per person. Payment is done at the court. or The host will reach you out via meetup chat. !!!Last but not least: if you have signed up but cannot make it for some reason, just take a minute to sign off, RSVP = no. This is to help those who are on the waiting list and want to play. The cancellation time with non-sick reason should be 18 hours before the session. In case you are not feeling well on the session day, please kindly contact the host via comment or privately message him/her with the direct message feature maximum 3 hours before the session starts. Looking forward to seeing you! cheers, Yoga Liability: The participation happens on own risk. There is no liability for any accidents, thefts or damages from the organizer.

**Survival Practice · Adult Group** 📅 **Sunday, February 1** What will you do if your phone dies, GPS fails, or the trail disappears? This practice is about **real navigation**, not theory. We go into the forest and **learn how to find our way out** — calmly, confidently, and without panic. ### What you’ll learn: ✔ How to determine your location using a **map and compass** ✔ How to choose the right trail — or move **without a trail at all** ✔ How to navigate terrain instead of following apps ✔ How to reach people and roads **without knowing your exact direction** These skills make every hike safer — and in critical situations, they can explain the difference between stress and control. *** 🥾 **Route:** \~ **17 km** of forest terrain ⬆️⬇️ **+690 / –690 m elevation** Physically challenging, mentally empowering. *** 📍 **Start & finish:** Letkés village, **Sport utca bus stop** [https://maps.app.goo.gl/AztaUtKqpiqD5y4m8](https://maps.app.goo.gl/AztaUtKqpiqD5y4m8) 🕘 **Meeting time:** 09:30 on site 🚆 Optional group travel from **Nyugati at 08:00** ⏰ Return after **16:00**, arrival at Nyugati around **17:55** *** 💶 **Participation fee:** Early payment (Friday until 20:00): **18,000 HUF** Saturday until 14:00: **20,000 HUF** Standard: **22,000 HUF** 🚌 Transport not included. 🎒 **What to bring:** * 1–1.5 L of water * Solid lunch * Comfortable clothes & shoes you can get dirty (mud guaranteed 😉) * Wind/rain jacket * Warm layers + hat * Optional: compass and **Börzsöny map** (Tape the fold lines. I’ll have a map too, but your own is better.) *** 🧠 **This is not a walk.** **This is a skill you keep for life.** Whatsapp: +36305183643 , Telegram: @Rudra_AM , Facebook: [https://www.facebook.com/leonid.syrovyatkin](https://www.facebook.com/leonid.syrovyatkin)

**Note:** *We receive bookings from many different platforms, so you can expect a lively group with people joining from all over the world. When you join this tour, you’ll be part of a fun, social crowd ready to explore the city together.* **Discover the Heart of Budapest — History, Culture & Hidden Stories** Step into the soul of Hungary’s capital with The Original Budapest Walking Tour, a perfect introduction to the city’s fascinating history, vibrant architecture, and rich culture. Whether it’s your first time in Budapest or you’re returning to see it from a local’s perspective, this tour offers the ultimate way to truly understand what makes the city so special. Led by passionate local guides, this walking tour takes you on a journey through both sides of the Danube — Buda and Pest — exploring their contrasts and connections. From royal palaces and heroic squares to ruin bars and romantic river views, every stop reveals a story that shaped Budapest’s identity. Get insider tips, local anecdotes, and a deeper appreciation for the people and events that made this one of Europe’s most enchanting capitals. **🌟 Highlights** * Explore Buda and Pest, the twin cities that form Budapest * Visit famous landmarks like St. Stephen’s Basilica, Chain Bridge, and Buda Castle * Learn about Hungary’s communist and royal past from expert local guides * Discover hidden gems and local hangouts off the beaten path * Enjoy a fun, engaging, and budget-friendly way to explore the city **✅ What’s Included** * Professional local tour guide * Comprehensive walking tour covering key historical and cultural sites * Insider recommendations for food, nightlife, and attractions * Small group experience for a more personal touch

**Note:** *We receive bookings from many different platforms, so you can expect a lively group with people joining from all over the world. When you join this tour, you’ll be part of a fun, social crowd ready to explore the city together.* **The Original Budapest Alternative Street Art & Jewish Tour 🎨✡️** Step off the beaten path and uncover Budapest’s vibrant street art culture and rich Jewish heritage on this immersive walking tour. Led by passionate local guides, this experience dives deep into the creative soul of Budapest’s 7th District—the historic Jewish Quarter—where history, art, and urban culture collide. Stroll through colorful streets filled with murals, hidden galleries, and cultural hubs, while learning how the city’s Jewish roots and post-communist era inspired a wave of artistic freedom. From synagogues and memorials to alternative bars, design studios, and community spaces, every stop tells a unique story about resilience, identity, and creativity. Whether you’re an art lover, a history buff, or a curious traveler, this tour offers a new perspective on Budapest’s most dynamic neighborhood. **🌟 Highlights** * Discover Budapest’s underground art scene and creative community * Explore the Jewish Quarter, its landmarks, and living heritage * See murals, installations, and street art masterpieces * Visit local galleries, ruin bars, and design spaces * Learn how Budapest’s history shaped its modern identity **✅ What’s Included** * Professional local guide * Walking tour through the Jewish Quarter & alternative neighborhoods * Insights into art, history, and local culture * Small-group experience for an authentic connection

OWASP is ending use of Meetup, so I built an eventbrite for the event. https://www.eventbrite.com/e/ai-development-risk-case-studies-and-how-agentic-ai-is-the-future-of-appsec-tickets-1981450622150?aff=oddtdtcreator AI is transforming how software is designed, developed, and deployed, dramatically accelerating velocity while introducing new categories of risk. As organizations adopt AI-assisted coding, autonomous agents, and increasingly complex model interactions, traditional application security approaches struggle to keep pace. This talk examines emerging AI-driven risks through real case studies from the field, highlighting issues such as insecure code generation, data-leakage pathways, model manipulation, and evolving supply-chain threats. We will explore how engineering teams must adapt their people, processes, and governance models to secure AI-augmented development workflows effectively. The session will then introduce agentic AI as the next evolution in application security—autonomous systems capable of continuous analysis, multi-step reasoning, and real-time remediation. Attendees will learn how combining agentic AI with modern practices can reduce developer friction, improve coverage, and create a future-ready application security strategy designed for the demands of AI-native software development

### Tools in your AI's Toolbox : An introduction to MCP Servers The generative AI revolution has unlocked unprecedented capabilities, but the next frontier is agency: empowering models to interact with, query, and act upon the world. The current challenge is the “N x M integration problem,” where every AI model requires a custom, brittle integration for each external tool or data source. This approach simply doesn’t scale. How can we give an AI access to our sales leads, code repositories, or IoT devices in a standardized, secure, and reusable way? This session introduces Anthropic’s Model Context Protocol (MCP), the open-source framework designed to solve this challenge and become the universal connector—the USB-C port—for AI. MCP standardizes how AI models discover and use external tools, moving beyond simple function-calling to a robust, client-server architecture. We will dive into how this open protocol is creating a new ecosystem for building powerful, context-aware AI agents. Join this session for a developer-focused introduction where you will learn how to: Understand the core concepts of the open-source Model Context Protocol and its architecture. Utilize pre-built, open-source MCP servers to instantly connect AI to tools like Git, Slack, and databases. Build a custom MCP server to securely expose your own proprietary data and APIs as tools for any compliant AI. Move beyond bespoke integrations and contribute to a standardized, collaborative, and open ecosystem. Stop building one-off connectors and start building intelligent agents. This session will give you the practical knowledge to leverage MCP and create the next generation of AI that doesn’t just talk, but does. Want to be a speaker? submit your talk to our Call for Presenters!!! [https://sessionize.com/azure-cbus-2026/](https://sessionize.com/azure-cbus-2026/)

In this local meeting, you will discover knowledge that you can use to get over the past. The key to improving your personal motivation, self-confidence, and happiness is to get over your painful memories. When you become free of your past, you will be free from stress, anger, anxiety and depression. Studies show that negative emotions can affect your health. By being free of negative emotions, believe it or not, you will most likely even look younger, feel more energetic, and become healthier! Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is brought to you by the Dianetics and Scientology life improvement center.

**People Analytics 101: Making Sense of Compensation Data** Compensation data is one of the most widely used and widely misunderstood forms of people analytics. The session will cover where compensation data comes from, including market pricing data, internal payroll data, and benchmarking sources, and how companies think about structuring and analyzing that information. We will explore how compensation data is leveraged to set salary ranges, manage internal equity, support hiring and retention, and align pay with business strategy. A portion of the session will address common data challenges and limitations, such as market noise, inconsistent job matching, and incomplete datasets, while keeping the primary focus on practical use rather than technical depth. The session will also look ahead at where the space is going, including the growing impact of pay transparency laws, expanding pay equity requirements, and emerging regulations in the US and Europe that require organizations to report on gender and pay gaps. The goal is to give attendees a clear mental model for how compensation analytics works today and why getting it right is becoming increasingly critical. (note: we are back at Rev1 this month!) **About Our Speaker** [Alex Moore](https://www.linkedin.com/in/alexscottmoore/) is the founder of [Moore Cooperative](https://moorecooperative.com/), where he advises organizations on compensation strategy, pay equity, and people analytics. His work focuses on helping organizations like the Ohio Supreme Court design, analyze, and communicate compensation systems that are data-informed, defensible, and aligned with organizational goals. Alex lives in Granville, Ohio and has three little kiddos. More info at [cbusdaw.com](https://cbusdaw.com)

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!