天体物理学

Agenda: 18:00 Doors Open 18:20 Intro/Sponsor Welcome 18:30 Doors Closed! (the reception on the ground floor will not be served anymore.. come early!) 18:30 **Here we go again: Java26 / Dominik Dorn** 19:30 Break, Food, Drinks 19:55 Raffle 20:00 **Java-UIs modernisieren ohne JavaScript — Webswing & webforJ in der Praxis / Stephan Wald** 21:00 Networking Talk 1: **Here we go again: Java 26** We'll explore everything new in Java 26! **Java-UIs modernisieren ohne JavaScript — Webswing & webforJ in der Praxis / Stephan Wald** Ihr habt eine Swing-Anwendung. Oder Eclipse RCP. Oder Oracle Forms. Das Management will sie „im Browser". Der Reflex: React-Frontend, REST-APIs, JavaScript-Entwickler einstellen, zwei Stacks pflegen. Aber muss das sein? Es gibt inzwischen mehrere Java-native Ansätze für Web-UIs — ihr kennt vermutlich einige davon aus früheren Meetups. Die meisten setzen voraus, dass ihr eure UI von Grund auf neu schreibt und bestehenden Code hinter REST-APIs kapselt. Unser Ansatz ist ein anderer: Wir zeigen einen **zweistufigen Migrationspfad**, der mit der unveränderten Bestandsanwendung im Browser startet und die Modernisierung dann Bildschirm für Bildschirm vorantreibt — ohne den Betrieb zu unterbrechen und ohne eine zweite Technologie einzuführen. Im ersten Schritt kommt **Webswing** zum Einsatz — eine Laufzeitumgebung, die Java-Desktop-Anwendungen (Swing, JavaFX, SWT, Eclipse RCP) unverändert im Browser bereitstellt, indem sie auf Toolkit-Ebene in die AWT-Pipeline eingreift und das Rendering über HTML5 Canvas und WebSocket an den Client streamt. Im zweiten Schritt zeigen wir **webforJ** — ein Open-Source-Framework (Apache 2.0), mit dem moderne Web-UIs komponentenbasiert in purem Java entstehen: Routing, Data Binding, responsive Layouts, Spring-Boot-Integration — ohne eine Zeile JavaScript. Der technische Kern des Abends: * **Webswing unter der Haube:** Wie die Custom-`Toolkit`-Implementierung funktioniert, was auf Server- vs. Client-Seite passiert, und wo die Latenz-Grenzen liegen * **webforJ-Architektur:** Server-seitiges Component Model auf Basis von DWC (Dynamic Web Client) Web Components, Event-Handling im Vergleich zum Swing-Listener-Modell, Layout-System (`FlexLayout` vs. `BorderLayout`) * **`WebswingConnector`:** Die Integrationsbrücke — wie eine webforJ-Anwendung eine Webswing-Session einbettet und bidirektionale Kommunikation zwischen Legacy-Swing-Code und modernem UI ermöglicht * **Live-Code:** Vom minimalen webforJ-Hello-World bis zur Hybrid-App mit eingebettetem Swing-Panel — wir bauen es vor euren Augen * **Ehrliche Trade-offs:** Wann dieser Ansatz passt, wann nicht — und was er im Vergleich zu einem reinen UI-Framework-Wechsel bringt und kostet Wir bringen einen Praxisbericht mit: Ein niederländischer ERP-Anbieter hat mit einem kleinen Team in vier Monaten die ersten Web-Module produktiv geschaltet — ohne JavaScript-Expertise im Haus. **About the Speaker** Stephan Wald entwickelt seit über 35 Jahren Enterprise-Software, seit über 20 Jahren in Java. Seine Erfahrung umfasst C++, C#, mehrere Business-Basic-Dialekte sowie heute primär Java. Als Head of Development und Mitglied der Geschäftsleitung bei BASIS International Ltd. (Albuquerque, USA) verantwortet er die Entwicklung des webforJ-Frameworks, eines Single-Stack-UI-Frameworks für geschäftskritische Java- und Kotlin-Anwendungen in mittelständischen und großen Unternehmen weltweit. Parallel baut er mit [SkillsPilot.de](http://skillspilot.de/) eine KI-gestützte SaaS-Plattform im HR-Consulting, die mit namhaften deutschen Unternehmen mit bis zu 20.000 Mitarbeitenden wächst. Speaker auf der JavaOne 2026.

**ACHTUNG! Wir treffen uns dieses Mal auf Grund von Bauarbeiten bei der U4 Station Friedensbrücke Ausgang Straßenbahn 5 und 12!!!** **Walk & Talk** Willst du auch mehr Bewegung in dein Leben bringen? Und dich dabei noch gut unterhalten, so dass die Zeit verfliegt? Dann bist du hier genau richtig, denn mir geht es genauso. Alleine ist langweilig und die Zeit vergeht nicht, daher hab ich mir Walk & Talk überlegt. Inspiriert wurde ich durch die Walk & Talk Gruppe in Hamburg, wo ich mehrere Male dabei war als ich in Hamburg lebte. Unterschiedliche Menschen treffen sich einmal in der Woche für einen flotten Spaziergang und unterhalten sich dabei. Ich liebe es neue Menschen kennenzulernen und auch bekannte Gesichter wiederzusehen, dann geh ich ganz nebenbei und das macht auch noch Spaß.😊 **Walk:** Wir brauchen einfach regelmäßige Bewegung und ich weiß selbst, wie schwierig es ist, diese in den Alltag zu integrieren. Deshalb ist dieser Walk genau richtig. Nach diesem Spaziergang fühlst du dich einfach wohl, fit und entspannt. **Talk:** Das Reden kommt ganz von selbst beim Gehen. Du kannst über alles reden, egal, ob privates oder berufliches, alles was sich ergibt ist willkommen. Und wenn du keinen Bock aufs Reden hast, dann gehst du alleine, auch das ist völlig in Ordnung. **Wie das ganze abläuft:** * Die Teilnahme ist völlig kostenlos. * Wo: U6 Spittelau (im Freien), Richtung Donaukanal, Ausgang Josef-Holaubek-Platz, direkt vor dem Fernwärme-Turm (https://maps.app.goo.gl/XwAayz4FQe2EW8WK9) * Wann: Wir treffen uns dienstags um 13 Uhr, egal, ob bei Regen, Sturm und Kälte oder bestem Sonnenschein – Walk & Talk findet nahezu JEDE Woche statt außer ich bin mal im Urlaub. * Wir starten pünktlich und beginnen mit einer kurzen Vorstellungsrunde. * Wie gehen am Donaukanal entlang von Höhe Spittelau bis zum Schwedenplatz und zurück. * Ca. 7 Kilometer sind wir unterwegs und unterhalten uns dabei mit interessanten Menschen. Dabei kannst du neue Bekanntschaften schließen, dich inspirieren lassen, von Projekten erzählen oder einfach nur smalltalken und die frische Luft genießen. Alles ist erlaubt. * Nach ca. 1,75 Stunden sind wir wieder am Ausgangspunkt zurück. * Bei einer Teilnahme von über 5 Personen gehen wir in Paaren und wechseln diese alle 10 Min. Wenn du aber lieber alleine gehst, ist das auch vollkommen in Ordnung. * Für alle, die einfach mal etwas Neues ausprobieren wollen. **Bist du bereit?** Dann komm mit! **Start bei U6 Spittelau Ausgang Donaukanal** Nochmal: um **PUNKT 13.00 Uhr dort sein**, denn **nach kurzen Vorstellungsrunde gehen wir gleich los. Sei pünktlich, denn die Gruppe wartet nicht.** Du musst nichts vorbereiten oder dich gar anmelden, komm einfach vorbei. Ausreden gibt es nicht. Geh mit und freu dich auf eine tolle neue Erfahrung. **Wer macht es?** Ich bin Marie Meyer-Marktl und Ideengeberin, Host und Organisatorin von Walk & Talk. Ich unterstütze seit 2019 Menschen dabei Freude ins Arbeitsleben zu bekommen und bin Business und Life Coachin. „Strahle, wenn du an deine Arbeit denkst“, ist meine Vision für jedermann und jedefrau. Privat merkte ich, dass ich endlich wieder mehr Bewegung brauche – und das klappt am besten gemeinsam mit anderen Menschen. Sei dabei bei Walk & Talk und bring Bewegung in dein Leben. **Do you speak English? Then welcome to Walk & Talk!** This event is suited for all people who like to connect to other people and like to walk. The beauty of this regular event is that you are in the nature and you walk around 7 kilometers. In the meantime, if you feel for it, you talk, if not, you just walk. You do something for your health, get to know new people and you will feel much better. It’s FREE, all you need to do is to show up this Tuesday at no later than 1 pm at the U6 Spittelau exit to Donaukanal.

Things to know before playing: Ladies and Gentlemen, boys and girls; We play Tuesday Night Football (outdoor only) . We play 90 minutes (kick off is at 20:30, and we meet at least 15 minutes before for a warm up phase). Post-Corona football matches are most likely between 14-16 and 28-32 players. If you would like to join please bring artificial turf shoes (like the ones for indoor turf) and shin pads (not mandatory but definitely recommendable). All I ask is that you come with a good mood, be respectful to everyone, and pay online using the link below. [Tuesday Night via FOOTxp football website](https://footballexperiences.net/kickaball/p/tuesdaynightfootball/) **Other methods for payments.** **Erste Bank Transfer**: **Sorin-Florian Brici** **AT27 2011 1829 5564 7001** **\*[Revolut](https://revolut.me/brici)** \- Recommended\! **\* [Wise](https://wise.com/pay/me/sorinb256)** \- Also recommended\! **\*[Paypal](https://www.paypal.com/paypalme/sorinSocial/)** \- Please use non\-Commercial product We play light: no sliding, hard tackling, fighting, screaming, & hopefully no injuries. We need to respect current regulations in Vienna, Austria. The main priorities are to have fun and being safe. The drinks are relatively free after the game in the local pub, served to those who have shown fantastic football fair-play skills. We will confirm the location, the pitches, and the dressing room numbers via our dedicated Football WhatsApp group/s. Keep an eye out for the group messages. See you all soon. Sorin SMS/ WhatsApp +43 6764276984 (please ask to be added to our football groups). We will probably need to confirm your presence if you are coming for the first or second time. Important management rule: **\> "No shows" are penalized with 10€ fee\. Please remove your name from the list at least SIX\!\!\! \(6\) HOURS before the event\.** Book a place via FootballExperiences.NET using this link [FOOTxp](https://footballexperiences.net/kickaball/) One small final note: Please avoid trying to take justice in your hands. If someone is talking bad, complaining, insulting someone, fouling on purpose or committing the usual football shenanigans, please let the organizers know. Measures will be taken, we assure you. Any misbehavior on your part, such as responding in an obscene way, fighting, or leaving the pitch is not a practical and diplomatic way of resolving the issues (it tends to create more tension and cause more problems). Let’s be respectful and mature and try to enjoy the game we all love. That’s why we’re all here. Get to know people from all over the world and have fun! Thank you. Sorin

This time, Tipsy Tuesday is partying with all the STUWO residents👨🏻‍🎓🧑🏻‍🎓 for the Spring Break🌸! Come join us for the weekly event Tipsy Tuesday🍸 @DAM/DAM Nightclub🪩 One night 🌜. One vibe🕺🏽. No excuses🙅🏽‍♂️. If you miss this... you'll hear about it all week🥴. Get your [tickets here](https://tipsytuesday.world/guestlist/iQHuxbvZ6peMdaRw) 🎫

🌞 **SALE EL SOL** 🌞 *Interactive Musical Story for the Whole Family* Step into a magical world of music, art, and flavor — a unique experience designed to share with children and awaken the senses. 📅 **April 7** 🕚 **11:00 AM & 3:00 PM** 📍 **Q19 OF – District 19, Vienna** ✨ What to expect: 🎶 Live bilingual music (Spanish – German) 🎨 Creative visual arts workshop for children ☕ Colombian fair-trade coffee tasting by **Cafecito Colombia** (available for purchase) – find us every Tuesday at Q19 🥟 Delicious Argentine empanadas by **Empanada Blitz** 🎭 **Artists** Eugenia Méndez – piano, voice & storytelling (Spanish) Gustavo Méndez-Liska – visual arts & storytelling (German) 💛 *Learn through the arts and experience with your senses.* Bring your family, invite your friends, and enjoy a meaningful cultural experience together. #ViennaEvents #FamilyEvent #LiveMusic #ArtForKids #ColombianCulture

Hello badminton fans! Before you dive in, let's lay down some housekeeping rules: **1**🚀 This event is for intermediate and above level players. **2**🤝 First-timers, please reach out to the host before hitting that sign up button. **3**👥 We are playing on two courts with 11 players. **4**🏸 Feather shuttles are on the house. Bring your racket, water bottle, towel etc and maybe a spare racket. **5**🕰️ Arrive early, please! 5-10 mins before kick-off, so that we can start on time. **6**💰 The event costs € 9,50 for 2 hours. Please pay to the host in cash and bring the exact amount with you. If you would like to pay online, please send the host a message. **7**🚨 Cancellation policy: If you're unable to show up, sign-out at least 24h before showtime. In case you cancel less than 24h before the start and we don't find your replacement, you will still have to pay your fees (No Exceptions). ALSO for wait list people, in case you have joined other events, please choose the option 'LEAVE WAITLIST' **8**🚫 No-show? No communication to the host? Welcome to the ban-zone for future events. Let's keep it real – A short message to the host will save the day. **9**🤜🤛 Sportsmanship is our middle name! Be kind, be cool, and let's keep the vibes high. Any antics otherwise? Your name will show up on the 'Black List' 😉 Get ready for some quality games, laughter, and maybe a few accidental shuttlecock dodges and smashes (not intentionally, it happens). See you on the court! 😄🖖🏋️‍♀️ PS: Find more events in our Badminton Meetup Community: www.badmintonmeetup.com

Komm am Dienstagabend von **18:00 bis 20:00 Uhr** zum English Café im Vienna Mosaik! In entspannter und freundlicher Atmosphäre kannst du kostenlos dein Englisch üben, neue Leute kennenlernen und gute Gespräche führen. Egal ob Anfänger:in oder ob du deine Englischkenntnisse verbessern möchtest – alle sind herzlich willkommen. Es gibt Gruppengespräche, Gesprächsimpulse und viel Raum für lockeren Austausch. Snacks und Getränke stehen bereit, also komm vorbei und genieße eine schöne gemeinsame Zeit. Wir freuen uns auf dich! \~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~ Join us Tuesday evening from **18:00 to 20:00** for English Café at Vienna Mosaik! This is a relaxed and welcoming space to practice speaking English at no cost. Meet new people and enjoy meaningful conversations in a friendly atmosphere. Whether you’re a beginner or want to sharpen your English skills, everyone is welcome. We’ll have group discussions, conversation prompts, and plenty of space to chat naturally. Snacks and drinks are provided, so come as you are, grab a cup, and enjoy a fun time together. We’re looking forward to seeing you!

⭐️Speed Networking Vienna Make connections. Find opportunities. Meet new friends. ⭐️Looking to expand your circle, meet inspiring people and actually enjoy the process? This is not just about business contacts — it’s about real human connection, shared interests and new friendships that can grow into something meaningful. 🔄 How it works: 10-minute one-to-one chats, new person each round. Easy, natural and relaxed — no awkward vibes, no forced conversations. ⭐️Perfect for people from different professions who want to connect, collaborate, exchange ideas and simply meet great new people. 💎Price 10€ and order a drink 📌 Limited spots – registration required. Come for the networking. Stay for the conversations. Leave with new contacts and new friends. 💬✨ Join us on Instagram https://www.instagram.com/makegoodfriends?igsh=YjA2czVxNjF0cGJi&utm_source=qr

Spring is back! You are invited to hike with us on **Sunday, April 12**, in the quiet hills around Vienna, starting together at 13:00 from Hütteldorf U4 U-Bahn/S-Bahn station and reaching the Jubiläumswarte on foot at around 450 mt altitude. The exact **meeting point** is just outside the station door facing the bus stops (you'll have the Anker bakery on your left when you exit through that door). A funny pug named Uschi will probably join us. We'll reach the Stadtwanderweg number 4 together and then we'll follow that hiking path entirely. We'll do a 30-minute stop near the observation tower on the top of the hill, where you can eat your fruits and snacks, and we plan to be back at the Hütteldorf station at 17:00. Please bring 1 liter of water and wear sturdy shoes and comfortable clothes. The hike is not long, but it is moderately difficult. We might sit in the meadow for a while if the weather allows it, so bringing a blanket could also be useful. IMPORTANT: This is not a guided hike, but simply a chance to experience nature around Vienna together, so everyone is responsible for their own health and safety. If you need more information, please ask in the comments below.

This is a **Special Film Club Event** - **Short Films** **Collection - Animated** We the Lovely Folks of the **Saturday Film Club, are back for the 26th Edition** this Saturday! 🎬🌿🕊️ ☀️ We start at **18:30** hrs. Films chosen for this week are: **Tennis Ball on His Day Off (2020, 6 min)** **Puparia (2020, 4 min)** **Teacups (2023, 5 min)** **Acrobats (6 min)** **The Village (2019, 14 min)** **Kandittund! (Seen It!) (2021, 20 min)** **Pachyderme (2022, 11 min)** **Wade (2019, 11 min)** **War Is Over! (2023, 11 min, Oscar Winner)** **Retirement Plan (2023, 17 min)** 🍽️ Post Meetup Food at **China Zentrum Stiegengasse**! 😁😁 If you just joined, please fill up this survey so we can better tailor the films we show. [https://forms.gle/juPwhehSV2NosLee9](https://forms.gle/juPwhehSV2NosLee9) PS - I can guarantee comfortable seating for 15 people. For the rest there are chairs. People in the waitlist can show up as well, because a lot of people sign up but don't show up. The event takes place at the Social Welfare organization called **MUT**. It is an organisation that works on social issues such as Emergency & Homeless Assistance, Food Rescue and Environment Protection. **MUT** is a non profit organization that provides us with the space to host the event. A small donation towards their cause helps them a lot.

⭐️Would you like to meet new friends?✨Welcome to Speed Friending in Vienna! Age 20-29/30-39. Please read the description attentively: Our next event is coming soon! Price for boys is 10€ and order a drink It is for free for girls ✨if you’re not comfortable with the price, you are welcome to skip this event. How it works: • You’ll have a short conversations with different people. • After each round, you’ll switch to meet someone new. • You’ll note who you liked, and if there’s a match, we’ll connect you after the event. ‍‍ Age groups: The main groups are for ages 20-29 and 30-39 You are welcome)! Register today)✨ Join us on Instagram and don’t miss new events https://www.instagram.com/makegoodfriends?igsh=YjA2czVxNjF0cGJi&utm_source=qr

Das Meridian Qi Gong ist sanft und gleichzeitig kräftigend für den Körper. Wir sind jede Woche am Sonntag draußen im grünen Prater. Komm und genieße das gemeinsame Bewegen im Freien mit der Natur, die Energie, und deinem Körper. Ein wunderbarer Start für deinen Tag! Für mehr Info über das Meridian Qi Gong: http://www.ericaderoo.com/meridian-chi-kung-bewegung-fuer-mehr-vitalitaet-und-lebensfreude/ WO sind wir: Im grünen Prater, genaue Location wird bekanntgegeben nach Anmeldung. Ich bitte um eine verbindliche Anmeldung: 06502649477. Beitrag: €10

To contact the main organizer for any information about our events, please use this number: +436767401074 (Also WhatsApp) Welcome to our friendly badminton event! Let's get moving, improve our game, and make new friends. We will be playing every Thursday from 06:00 PM to 08:00 PM. **Very important: this event is for you if your level is intermediate or any higher level above that.** 🏸🙂 **If you're joining us for the first time, the organizer will contact you directly to confirm that you have the required level for this event.** Feather shuttlecock will be use for this event, and it will be provided by the host. The location: Sport and Fun Halle Leopoldstadt / Venediger Au 11, 1020 Wien The Price: We try our best to provide you with the best price in Vienna. You will be paying 9.5 Euro for 2 hours. How to pay: We accept card payment and cash (card payments are preferred) Number of players : We have 2 courts reserved for this event and aiming to have 10-11 players in total (so we can take a small break between matches) Remember to bring your own racket, please. **Cancellation policy:** 1- Canceling 24 hours before the event = free cancellation 2- Cancellation after the 24-hour deadline = we will ask you kindly to pay the event fee if we are not able to find a suitable replacement. (No exception) In case of not paying = banned from future events. See you on the court :)

To contact the main organizer for any information about our events, please use this number: +436767401074 (Also WhatsApp) Welcome to our friendly badminton event! Let's get moving, improve our game, and make new friends. We will be playing every Sunday from 11:00 AM to 01:00 PM. **Very important: this event is for you if your level is intermediate or any higher level above that. 🏸🙂** **If you're joining us for the first time, the organizer will contact you directly to confirm that you have the required level for this event.** Feather shuttlecock will be used for this event, and it will be provided by the host. The location: Tennispoint, Baumgasse 87, 1030 Wien The Price: We try our best to provide you with the best price in Vienna. You will be paying 10 euros for 2 hours. How to pay: We accept card payments and cash (card payments are preferred) Number of players: It depends on how many courts we get, 6 for 1 court and about 10-11 for 2 courts (so we can take a small break between matches) Remember to bring your own racket please, or you can rent one at the reception for about 3 euros **Cancellation policy:** 1- Canceling 48 hours before the event = free cancellation 2- Cancellation after the 48-hour deadline = we will ask you kindly to pay the event fee if we are not able to find a suitable replacement. (No exception) In case of not paying = banned from future events. See you on the court :)

The Fellowship of the Star Schema: Transforming OLTP Data for Power BI One does not simply build reports on OLTP data. Join us on an epic journey from the depths of raw, normalized tables to the shining halls of a well-modeled star schema fit for Power BI greatness. We will demystify the differences between OLTP and OLAP, walk through star schema vs snowflake (and why Power BI has a clear favorite), and show you the compression differences between normalized and columnar storage that will make you never look at an OLTP model the same way again. We will cover the different types of dimensions, when to use them, and how to handle Slowly Changing Dimensions without losing your mind. You will leave knowing exactly how to identify a bad model, how to convert OLTP data into a clean star schema, and how to forge relationships that rule them all. Whether you are a data wizard, a curious hobbit, or somewhere in between, your models will never be the same.

Join us for pizza and conversation at Vick’s Gourmet Pizza! 🍕 Good slices, good stories, and plenty of laughs around the table. Come hungry, bring your best conversation, and let’s enjoy a relaxed evening with great company. Extra cheese and extra chatter encouraged! 😄

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

Let’s try this popular Italian restaurant in Reynoldsburg. This is the menu: https://scaliristorante.com/#4e468054-0235-43e2-81c2-44e061341e9e

Over time I'm hoping to organize a hike to all the Franklin County Metro Parks. This is the first one so if you're interested jump in! We'll start with the Canopy Walk, a cool feature of this park. Climb 100 stairs to the top - or take the elevator if stairs aren't your thing. At the top there are a bunch of things to play on - a rope bridge, a fireman pole that we can slide down - and more! About fifteen minutes there and we'll head to the natural trail, Buttonbush, Maple and Beech Trail for 2.2 miles then do a 1.7 mile loop on the paved Greenway Trail. We'll be passing our cars as we transition if you only want to do the first loop, or the second loop. Pace of around 3.5 mph but no one left behind. If there is an interest we can grab lunch nearby afterward.

Meet at Wolfe Park parking lot by tennis courts. We willl walk along Alum Creek trail, through Jeffrey Mansion Park then along Bexley neighborhood and back. Optional lunch at Trolley District.