Numerical Analysis

**Overview** === He's back! For our February event, we are thrilled to welcome a special guest out of semi-retirement: John Ryan. As a former Snowflake employee and current Data Superhero, John has been there since the beginning. In fact, he and I co-hosted Ireland’s first-ever Snowflake event. Since the venue was a converted church, we called it the **"Church of Data."** It was the perfect setting to kick off our Snowflake evangelism. **Abstract** === Moving from on-premises data platforms to cloud isn’t just a technology change — it’s a cost and operating model shift. Many teams underestimate this and end up with performance issues, spiralling spend, or both. This session explains why traditional on-prem thinking breaks down in Snowflake, how Snowflake is designed to scale, and where customers commonly go wrong. Using real lessons from three large Snowflake customers, we’ll walk through: What “scale up” really means in Snowflake (and when not to use it) Three common mistakes that quietly drive cost and poor performance What actually worked in production — not theory, not marketing slides This is a practical, experience-based session aimed at engineers, architects, and technical leaders who want Snowflake to run faster without wasting money.

Yoga Classes with Hannah Fitzpatrick on Wednesday evenings at Anam Ashram, Tallaght, 7pm-8:8.30pm. This is a moderate paced class where we will stretch and strengthen our bodies in various ways, but we will also keep a keen awareness on our breath and body-sensation throughout. We'll aim to increase our connection and our compassion to ourselves, while also giving our bodies the refreshing and rejuvenating workout it adores and requires! We will end with a guided deep relaxation. Contact Hannah for more details and for booking on 083-4863900

Join us for an Apache Kafka® x Apache Flink® meetup on Wednesday February 25th from 6:00pm in Dublin hosted by Autodesk! **Venue:** Autodesk 1 Windmill Lane, 2nd Floor, Dublin D02 F206 **PLEASE BRING A FORM OF VALID ID AND REGISTER WITH YOUR DETAILS FOR SECURITY PURPOSES/BUILDING ACCESS. THANK YOU!** **Agenda:** * 6:00pm: Doors open * 6:00pm – 6:30pm: Food, Drinks & Networking * 6:30pm - 7:15pm: John Byrne, Sr. Manager, Partner Applied Solutions, Confluent * 7:15pm - 8:00pm: Rishayah Kumar Trivedi, Senior DevOps/SRE Engineer, Autodesk & Douglas Hobson, Principal DevOps/SRE Engineer, Autodesk * 8:00pm - 9:00pm: Additional Q&A and Networking **First Speaker:** John Byrne, Sr. Manager, Partner Applied Solutions, Confluent **Title of Talk:** Flink State: Design Choices You Can’t Undo *(on Confluent Cloud)* **Abstract:** A practical look at how state behaves when running Flink on Confluent Cloud, the early design decisions teams often underestimate (keyed state, TTLs, upgrades, reprocessing), and the kinds of problems that only show up months later. **Bio:** John Byrne is a Sr. Manager, Partner Applied Solutions at Confluent, the company founded by the original creators of Apache Kafka®. With a strong background in data engineering, John previously worked for Slice, Registers of Scotland, and Sopra Steria, where he specialized in event streaming, ETLs, and data governance. Passionate about GIS, mapping, and ETL processes, he has delivered talks at FOSS4G and developed production-grade ETL projects incorporating spatial data and mapping technologies. In his spare time, John enjoys playing golf and coaching his local youth rugby team. **Second Speakers:** Rishayah Kumar Trivedi, Senior DevOps/SRE Engineer, Autodesk & Douglas Hobson, Principal DevOps/SRE Engineer, Autodesk **Title of Talk:** To Production and Platform: Our Kafka Journey, DR Strategy, and Kafka-as-a-Service **Abstract:** In various organisations, multiple teams have historically had to build Kafka the hard way, spending months on security hardening, compliance validation, observability, and disaster recovery, often repeating the same work with inconsistent outcomes. The result is slow onboarding, duplicated effort, and operational silos that don’t scale as more streaming use cases come online. In this talk, we walk through our Kafka production journey on AWS MSK: how we began with a POC, what it really takes to make Kafka production-ready, and the key platform decisions we had to take to standardise the architecture and operations. We’ll then dive into disaster recovery for streaming applications where the hard problems aren’t just infrastructure failover, but event continuity and restoring pipelines under pressure. We’ll share our HA DR approach for Kafka-backed systems, including an active/passive regional strategy, and practical failover/failback considerations to minimise RPO/RTO. Finally, we’ll close with our Kafka-as-a-Service (KaaS) vision for Autodesk teams: self-service, policy-driven deployments and service tiers that let internal teams onboard in hours instead of months so the product teams can focus on building streaming features, while the platform provides consistent guardrails for security, reliability, and recoverability. Attendees will leave with a checklist of production-ready requirements for Kafka, a clear mental model for DR in streaming systems and a set of platform patterns for evolving towards Kafka-as-a-Service. **Bios:** **Rishayah Kumar Trivedi (Senior DevOps/SRE Engineer, Autodesk)** Rishayah is a Senior DevOps/SRE engineer at Autodesk's data streaming and processing platform team with 9+ years of experience building scalable cloud infrastructure and automating enterprise deployments. He holds industry-recognised credentials in AWS, Kubernetes, and DevOps, and has led many initiatives improving reliability, performance, and security through Shift-left approach, IaC and CI/CD best practices. **Douglas Hobson (Principal DevOps/SRE Engineer, Autodesk)** Douglas is an accomplished Principal Devops/SRE engineer in Autodesk's data streaming and processing platform team with extensive experience in cloud architecture, infrastructure automation, and systems reliability. With a proven track record at various firms, he has led global teams in building scalable, secure, and high-performing cloud environments. Skilled in AWS, IaC, and distributed systems, Douglas is recognised for his technical leadership, problem-solving expertise, and commitment to operational excellence. \*\*\* DISCLAIMER We are unable to cater for any attendees under the age of 18. If you would like to speak or host our next event please let us know! [community@confluent.io](http://community@confluent.io/)

Wednesdays in Dublin — Weekly Tango Training Join us every Wednesday in Dublin for tango classes in both roles, guided by skilled instructors with proven teaching methods. 6:00 pm – Beginners / Fundamentals 7:00 pm – Intermediate & Advanced - Special Vals Workshop 8:30–11:00 pm – La Social Tango Práctica Location: Mind the Step – Dublin Refine your technique, deepen your connection, and experience tango in a welcoming space full of positive energy and passion. Come solo or bring a partner — all are welcome! Only Fundamental class €15 Class+ Workshop + Practica: €18 Workshop + Practica: €18 Practica only: €10 Organized by Lucia & Gerry, Corresponding Academicians of the National Tango Academy of Argentina. Tango Classes Lucia & Gerry — the first and only multidisciplinary tango school in Ireland

Great weekend for Irish Rugby as we did what we do most years, and stuffed England at Twickers. We can all celebrate with a few pints of Guinness this Wednesday after our wee run around the place, finishing off at **O'Briens on Sussex Terrace**. Hopefully, given it's nearly the end of February it might stop raining for a few hours, and the weather may well be improving over the next few weeks - Fingers Crossed... But never fear, Run & Beers proceeds despite the weather - after all, we are in Ireland, what's a little bit of weather! For newcomers, our Group Runs are great fun, safe for all, and once the run is complete, we can share a beer, have a good chat, make new friends, and look forward to the following week. The route map is here - https://www.mappedometer.com/?maproute=937050 Regards, Liam

Get over the mid week slump and come down to meet some new faces and relax. We try and go to a different bar every week and you can join us anytime after 18:30. **How to find the group?** \*We have an area reserved just for us so if you are new and unsure please ask any of the bar staff for the area reserved under the organisers name or if completely lost on the night please contact the event host and they'll come and find you. **How does it work?** \*After finding the group either the organiser will approach you and ask if you are looking for the meetup or you can just ask anyone "Is this the meetup?" and normally that is a great conversation opener to join the group. After that it's up to you what you make of the event. That is pretty much it. Easy right? We normally encourage people to stand as it's much easier to mingle that way. **Nervous about coming to the event?** \*While it's quite intimidating meeting a bunch of strangers from the internet we are a very welcoming group. We normally look out for new people and remember that everyone in the group has been new in the group at one point. If are you'd like extra help just contact the event host on the night. **Interested in helping out?** \*Let me (Éamonn) know as it would be greatly appreciated. **Something happened?** \*Please report it to the organiser as we cannot do anything to prevent it from happening again if we don't know about it. Even if it's something small please let the organiser know as they are probably unaware. We aim to have the location up by Monday afternoon before the event. The bars we go to are all based in the city centre. **See you on Wednesday!**

My name is Aurelie and I'm graduating with an MSc in Artificial Intelligence from the University of Limerick. I run monthly **machine learning** and **deep learning** tutorials in Dublin with a small group of people. \*\*In this tutorial, we will build a **CNN** model to classify images into categories, we will be using a public dataset. Together, we will walk through the full pipeline from data preprocessing to model training and evaluation. You will receive a jupyter notebook with reusable code showing all of these steps. No set up required, just a laptop and a google email address :) **The tutorials are limited to 15 participants and you can reserve your spot either here or by emailing aureliem219@gmail.com. Please make sure to book as soon as possible, as the registration count on Meetup does not guarantee availability.** **For more information about the tutorials:** * The tutorials are interactive and will be conducted using **Jupyter notebooks** on **Google Colaboratory** (a free, cloud-based platform that lets us write and run code directly in the browser). While **Google Colaboratory** is free to use, tasks that require more computational power (such as training deep learning models) may benefit from GPU access. In that case, Google offers a once-off payment for around €10 which can last several months depending on your usage. Some familiarity with **Python** or other programming languages is helpful but not required. Everyone is welcome to join and learn at their own pace. * The tutorial lasts for 1.5 hours. * During the tutorial, I share the Jupyter notebook with participants so they can keep it for future reference. We go through the notebook step by step together and I do my best to answer any questions along the way. * The notebook includes the complete code from data preparation to model training and evaluation. It can be reused or adapted for your own business needs or personal projects * We will be working with a variety of **Python** libraries including **Scikit-learn**, **PyTorch**, **TensorFlow**, **Keras**, **Seaborn**, **Pandas** and **Matplotlib** and the **Hugging Face** framework. These tools will help us explore different machine learning and deep learning techniques using publicly available datasets. * Each tutorial focuses on a different algorithm in depth. Topics covered include **linear regression**, **logistic regression**, **K-means clustering**, **decision trees**, **artificial neural networks (ANNs)**, **convolutional neural networks (CNNs)** for image classification, **object detection** and **natural language processing**. The goal is to break down each technique step by step, making it approachable and practical for real-world applications. This tutorial take place at the **Grafton Hotel, 32 Stephen Street Lower, Dublin 2** (We will be sitting in the lounge in the corner or on the right handside). It will run from **3 pm** to **4 pm**. **Grafton Hotel, 32 Stephen Street Lower, Dublin 2** * The tutorials are a high-level practical introduction to machine learning and deep learning and the emphasis on understanding how we process the data , train and evaluate a model with Python. We won't cover the mathematics behind it however some tutorials may have mathematical formulas as part of the algorithm explanation and some tutorials might have more complex data preprocessing as it depends on the datasets and the task we are doing. However the tutorials focus on the practical part! * *Payments need to be made in advance to secure your place and fees are non-refundable unless I need to cancel the event, in this case refunds will be made.*

Join us for dinner at **Rotana Grill**, at Temple Bar. To secure your spot, a _€3 deposit is required_ when signing up and being added to the attend list. Without the deposit, you’ll be placed on the waiting list. [Secure my spot](https://revolut.me/aphidethp) [Rotana Grill](https://www.instagram.com/rotanagrilldublin?igsh=OWlzeG43dmg0d2g2) This event is free to attend, but please note the following: • Due to an increasing number of no-shows, last minute RSVP and the fact that some restaurants require a deposit for reservations, a deposit will now be required via [Revolut](https://revolut.me/aphidethp). It will be deducted from your bill. Please note that the deposit is non-refundable. • The restaurant will apply a service fee for groups, typically around 1%. • Each participant is responsible for paying for their own food and drinks. • Some restaurants may not split the bill, so to keep things smooth and hassle-free, it’s a good idea to bring some cash or have Revolut ready for easy payments. • If a restaurant requires a booking fee, we may need to consider alternative venues to ensure a seamless experience for everyone. • RSVP updates are essential: If you can no longer attend, please update your RSVP so others on the waiting list can join. This also helps us manage reservations more effectively.

Adult Bachata and Salsa dance classes with practice social at Coolock Ardlea Scout Den Coolock Village. This is a mirror studio located upstairs from the hall with nice wooden floors. This is a weekly Thursday event. Come down, learn and have fun! Men and Women are welcome. Free taster for first timers and discount for students, request via dm. Beginners cost 10 euro for all beginner classes and practice.

\*\*\*Please check your meetup messages for exact location\*\*\* Come join us for a delightful Sunday Yoga class. We meet every Sunday for an indoor yoga class .The class will includes yoga, meditation, and breathwork providing a complete mind-body wellness experience. We end with a cup of tea , journalling and conversations. The gathering takes place every Sunday in Dublin 18, Clayfarm. I will message you exact location after your register. This class is not just about practicing yoga, but also creating a sense of community and connection, so don't forget to invite your friends along! Remember to register through the link below to secure your spot and remember to bring your mat and journal on the day. Search for 'Yogawithpreity' on instagram to know view our past events Namaste, Preity.

We will try to secure a table downstairs in the venue in order to keep the location consistent. New people who know nothing about Linux are welcome and encouraged to attend, please don't be shy. If you are new please feel free to approach one of the organisers, and we'd be only happy to help explain things as best as we can, we honestly don't mind and don't judge. We were new once ourselves :) Please note that in general, these are adult friendly meetups, therefore, we are not responsible for those under 18 in attendance. We may have events targeted at children in the future. As with any Meetup, please try to stick to your RSVP or change it to No if you can't come.

We at Freesalsa Ireland believe in growing the community, something our friend DJ Leo also believes in. Therefore, we are delighted to promote his weekly practice here on our Meetup for those of you looking to spend their Sunday in the best way. There will be a 60-minute lesson before social with the award-winning DJ Leo until 17.00. Prices stand at a very affordable: €5: Only Social or Only Class €5: for beginners class and social €7: for intermediate/improvers class and social. *Please note, class capacity is limited, so arrive early to be sure of a spot; first come, first serve. This is why we dance. To spend time with folks and have new experiences. You won't find a better group to do that with than this. See you all then.

Some trained COUNT volunteers work together once a month at RMH (http://www.rmhc-centralohio.org/volunteer.php) as Housewarmers (usually on the 1st Sunday from 1 – 5 PM). Some schedule other shifts at their convenience. You may try this out with less fuss by following a "Fast track" or go through the normal process. Fast track • Arrange a time to shadow a COUNT volunteer. Call Dave Nohle at 614-268-9558 (cell). • Show up and try it out. • Complete application, etc. later. Normal process • Complete an online application (http://rmhc-centralohio.org/volunteer/). • Attend orientation in advance. • At orientation you will complete forms agreeing to keep family/patient info private and allowing a background check and tour the facility. • Complete one training shift. Daily shifts are: morning 9 AM - 1 PM, afternoon 1 - 5 PM and evening 5 - 9 PM. • Schedule shifts online using the on the RMH scheduling system (http://www.volgistics.com/ex/portal.dll/?FROM=32895). The Ronald McDonald House (RMH) provides housing and meals for families with sick children. The Columbus RMH is the largest in the world with 137 rooms. COUNT has been volunteering there since May 2014. Housewarmers work with RMH guests to provide a home-like environment - greet, assist with family needs, answer phones, give tours, assist with checkin/checkout, prepare guest rooms after checkout, clean facility, laundry, restock supplies and staff the front desk. RMH Housewarmers volunteer at least one four-hour shift a month. All Housewarmers must complete an application and agree to a background check before they can be full fledged volunteers.

**Google Analytics Alternatives** Is it finally time to make the switch away from Google Analytics? Two-and-a-half years ago Jason Packer asked this question at Columbus Web Analytics Wednesday. Since then: Google’s Universal Analytics has been sunset, we’ve changed our name to Columbus Data & Analytics Wednesday, and Jason has released two editions of his book “Google Analytics Alternatives”. Fresh off the release of the 2nd edition of his book, we thought it was time to re-open this conversation. While people love to complain about it, GA’s market share has remained relatively constant (at least in the United States). Why is that? You won’t find any complaints about GA4 in this talk, but rather an overview of what’s currently available in the market and how to frame your decision-making process. We’ll also be giving out some free copies of Jason’s book! So even if you’ve got a “GA4Lyfe” tattoo (no judgement), there’s free books to go with the free pizza and beer. Thanks to our 2026 sponsors: [Clarivoy](https://www.clarivoy.com), [What Box Consulting Group](https://www.whatboxconsultinggroup.com), [Conductrics](https://www.conductrics.com), and [Piwik PRO](https://piwik.pro) More info at [cbusdaw.com](https://cbusdaw.com)

**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)

** Online Speed Dating – Perfect for First Timers – Connect with Local Singles from Anywhere!** ** ATTENTION: RSVPing Here Will NOT Reserve Your Spot!** You need to click the registration link for your age group below, register, and complete the personality quiz to be entered. **Spots fill up quickly** – act now to secure yours! ** Click Your Age Group to Register & Complete the Quiz:** - **Ages 18-32** → [REGISTER HERE](https://tempodating.com/product?productId=369.0&productType=onlineSpeedDating&city=Indianapolis&groupurlname=serene-lake-love-mirror&ar=18-32) - **Ages 30-46** → [REGISTER HERE](https://tempodating.com/product?productId=369.0&productType=onlineSpeedDating&city=Indianapolis&groupurlname=serene-lake-love-mirror&ar=30-46) - **Ages 40-58** → [REGISTER HERE](https://tempodating.com/product?productId=369.0&productType=onlineSpeedDating&city=Indianapolis&groupurlname=serene-lake-love-mirror&ar=40-58) - **Ages 55+** → [REGISTER HERE](https://tempodating.com/product?productId=369.0&productType=onlineSpeedDating&city=Indianapolis&groupurlname=serene-lake-love-mirror&ar=55+) --- **Ready to try something new from the comfort of home?** Let's go! This isn't your typical dating event. It's a curated, online experience where first-timers meet compatible Indianapolis singles in a low-key, guided environment. No pressure – just possibilities. **Perfect for:** - Anyone who's tired of swiping and wants real conversation - First-timers who want a safe space to practice dating skills - Shy or reserved singles who open up better in private chats **Event Details** - **Format:** Online via Zoom – comfortable, low-pressure from anywhere - **Location:** Your cozy space – meet from wherever you feel most comfortable - **Host:** Supportive facilitator experienced in helping newcomers enjoy speed dating - **Vibe:** Positive energy, real talk, and authentic connections with Indianapolis locals **How It Works** 1. **Select Your Age Range** – Click the link for your age group and sign up. 2. **Complete Your Profile Quiz** – A quick questionnaire so we can find your best matches. 3. **Connect on Zoom** – No setup needed. Just click the link and you're in! 4. **Enjoy the Conversations** – Each round is timed and guided so every chat feels natural and fun. 5. **See Who Liked You Back** – Mutual matches sent to your inbox. Your next chapter begins! **Frequently Asked Questions** **What if I'm shy or introverted?** You're in the right place! The online format and guided conversations make it easy and comfortable for everyone. **Do I need speed dating experience?** Absolutely not! This event is designed specifically for first-timers. Our host guides you through every step. **Do I need to download anything?** Just Zoom! If you've used Zoom before, you're all set. We'll send you the link after registration. **What if I don't match with anyone?** That's okay! Many people attend multiple events before finding their match. Each event is a new opportunity. --- ✨ Great connections start with a single conversation. Yours could start tonight! ✨

**Caller: Frank Buschelmann** **Band: The Rosenthorns** **Big Scioty Contra Dance** **temporarily returning to our long ago location for Jan-March - First Congregational Church, 444 E. Broad St., Columbus 43215** WHAT IS CONTRA DANCING? Picture the Grand Ball scenes like you’ve seen in period films such as “Pride and Prejudice”, where the dancers are lined up in long lines, across from each other. That’s English Country Dancing, the predecessor of contra dancing. Now, add moves like “swing your partner” and “do-si-do,” like you’ve seen in square dancing. Set it to fabulous, high energy, live music with fiddles, guitars, percussion and more, alá “Riverdance.” Finally, set the whole scene down in the middle of Woodstock, with a hip, groovy atmosphere, a bit of tie-dye, and hints of counter-culture attitude. THAT’s Contra Dancing! Wear cool and comfortable clothes (you will get warm) and clean shoes that won't mark up our nice wood floor. Be sure to come for the beginner's lesson from 7:30 - 8:00, followed by dancing 8:00 - 10:30. All dances are taught; we will help you learn! Beginners always welcome, no need to bring a partner. Cost is $10.00 adults, $5.00 ages 12-26. Under 12 free. Free parking in church lot. For more information contact me or check out our website: [www.bigscioty.com](http://www.bigscioty.com/) Please bring your own refillable water bottle. Snacks to share are always welcome!

Let's gather for lunch at Carfagna's followed by an optional stop in Carfagna's Market to check out the tastes and smells of Italy. Carfagna's address is 1440 Gemini Pl, Columbus, OH 43240