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🤍 We will tell you how to serve a hundred thousand requests per second, for fun and non-profit Wikipedia is one of the most visited websites on earth and runs on donations only. All of our infra is in-house to make sure we protect our users' privacy. This is not easy but it's possible. If you want to know how we do that, come to our talk. We will explain our system architecture, tell you about our database setup, the caching layers, and all the other bits and pieces. Amir Sarabadani Lucas Werkmeister Daniel 🤍
🤍 Find out what lies at the intersection of music and programming with this brief look at LilyPond, the free programmable musical typesetter! [LilyPond](🤍 is a musical typesetting program. While it aims to produce beautiful scores by default, its output is also extensively configurable and programmable. This makes it an attractive hobby for people at the intersection of programming and music, some of whom I hope to captivate with this talk. Lucas Werkmeister 🤍
🤍 Find out what kind of free services Wikimedia provides for you. Wikimedia Cloud Services is a collection of services that the Wikimedia Foundation offers, free of charge, to anyone who can use them for furthering the goals of the Wikimedia movement. This includes Toolforge, a hosting service for tools written in various languages; Cloud VPS, full virtual private servers for advanced development beyond the capabilities of Toolforge; convenient access to Wikimedia project data; and more! Link and other useful information: 🤍 Lucas Werkmeister Amir Sarabadani 🤍
🤍 Wir präsentieren zum dritten Mal einen bunten Blumenstrauß aus Nerdsniping-Themen – einige unserer Lieblingsfakten über Computer, Kunst und Kuriositäten! Wir ziehen viel Inspiration aus neuen und absurden Ideen, und möchten diese Begeisterung mit euch teilen! Es gibt Aufzeichnungen von [Vol. 1](🤍 und [Vol. 2](🤍 blinry bleeptrack 🤍
🤍 A showcase of software implemented outside of the MediaWiki and MediaWiki extensions code repositories. Wikimedia's communities have diverse interests, use cases and technical needs. Volunteer developers experiment with new ideas, build solutions and bridge workflow gaps across our software stack. This session is a showcase of a variety of impressive software solutions implemented outside of the MediaWiki and MediaWiki extensions code repositories. Andre Klapper 🤍
🤍 Did you ever want to develop cross-platform application from one single code base? Are you afraid to get worse performance than with native code? Flutter may help you! Flutter is an open-source cross platform framework which allows you to create native applications. As is does not use JavaScript it won't require a hole WebView in background. Due to this and the incredible easy syntax it's one most advanced frameworks for applications running on mobile devices, in the web and on desktops. In this talk, I will introduce the basics of Flutter, what's different to other frameworks and some details about its structure. Der mit dem Zopf (The one with the braid) 🤍
🤍 Wir präsentieren zum dritten Mal einen bunten Blumenstrauß aus Nerdsniping-Themen – einige unserer Lieblingsfakten über Computer, Kunst und Kuriositäten! Wir ziehen viel Inspiration aus neuen und absurden Ideen, und möchten diese Begeisterung mit euch teilen! Es gibt Aufzeichnungen von [Vol. 1](🤍 und [Vol. 2](🤍 blinry bleeptrack 🤍
🤍 greenerWP is dedicated to help WordPress site owners making their sites and blogs more environmentally sustainable. greenerWP wants to help WordPress site owners making their sites more environmentally sustainable. The non-profit free/libre open source project consists of a website scanner, a WordPress plugin which provides guidance and optimizations, a lightweight WordPress theme that is optimized for sustainability, and guides and tools for setting up a solar powered single board computer running WordPress. The talk will give a short overview of the project and its development state. Christian Neumann 🤍
🤍 You can find a lot of interesting, useful or amusing information on Wikidata – let’s spend half an hour writing some queries together! This will be an interactive session to explore the possibilities of Wikidata, the free knowledge base, and its query service. Participants can suggest queries, and I’ll do my best to implement them. Lucas Werkmeister 🤍
🤍 greenerWP is dedicated to help WordPress site owners making their sites and blogs more environmentally sustainable. greenerWP wants to help WordPress site owners making their sites more environmentally sustainable. The non-profit free/libre open source project consists of a website scanner, a WordPress plugin which provides guidance and optimizations, a lightweight WordPress theme that is optimized for sustainability, and guides and tools for setting up a solar powered single board computer running WordPress. The talk will give a short overview of the project and its development state. Christian Neumann 🤍
🤍 Seit fünf Jahren setzen sich innerhalb des Netzwerks [„Code for Germany“](🤍) in ganz Deutschland rund 300 Ehrenamtliche für offene Daten ein und bauen damit Anwendungen für alle. Auch 2019 ist bei uns einiges passiert, was wir euch hier vorstellen wollen. Wir haben uns beispielsweise mit Daten zu Umwelt, Politik und jeder Menge Kartenmaterial beschäftigt und viele neue Projekte am Start. Manche glänzen schon richtig, andere suchen noch Unterstützung. Im Talk erklären wir, was offene Daten eigentlich sind, was man daraus bauen kann und wie man bei uns mitmachen kann. [Code for Germany](🤍) ist ein Netzwerk von Gruppen ehrenamtlich engagierter Freiwilliger. Wir nutzen unsere Fähigkeiten, um unsere Städte und das gesellschaftliche Miteinander positiv zu gestalten. Wir setzen uns für mehr Transparenz, Offene Daten und Partizipation in unseren Städten ein. Wir vermitteln insbesondere zwischen Zivilgesellschaft, Verwaltung und Politik und nutzen unsere Fähigkeiten, um die Kommunikation zwischen diesen zu verbessern und notwendige Impulse zu setzen, damit die Möglichkeiten der offenen und freien Digitalisierung so vielen Menschen wie möglich zugute kommen. Julia 🤍
🤍 Das schnelle Quiz für alle jungen Hackerinnen und Hacker zwischen 12 und 18 Jahren. Lasst ihr euch von den Erwachsenen jagen oder entkommt ihr eurem Jäger? Gefragt - Gejagt ist ein bekanntes Quizformat aus der ARD. Wir stellen eine Junghacker\*innen-Version auf die Beine und lassen zwei clevere Teams bestehend aus Jugendlichen zwischen 12 und 18 Jahren gegeneinander, aber auch gegen die erwachsenen und erfahrenen Jäger\*innen antreten. Können sie gewinnen? Wir werden es herausfinden! Euch erwarten schnelle Fragerunden, abwechslungsreiche Themengebiete und an erster Stelle ganz viel gute Laune und Cyber! Du kannst dich zum mitspielen bewerben oder mithelfen - auch als Erwachsene\*r. Alle Informationen, die du dazu brauchst, findest du unter [nwng.eu/36c3-gg!](🤍 Wir freuen uns auf dich! <3 nwng n0emis Der mit dem Zopf 🤍
🤍 The ever-growing Wikidata contains a vast amount of factual knowledge. More complex knowledge, however, lies hidden beneath the surface: it can only be discovered by combining the factual statements of multiple items. Some of this knowledge may not even be stated explicitly, but rather hold simply by virtue of having no counterexamples present on Wikidata. Such implicit knowledge is not readily discoverable by humans, as the sheer size of Wikidata makes it impossible to verify the absence of counterexamples. We set out to identify a form of implicit knowledge that is succinctly representable, yet still comprehensible to humans: implications between properties of some set of items. Using techniques from Formal Concept Analysis, we show how to compute such implications, which can then be used to enhance the quality of Wikidata itself: absence of an expected rule points to counterexamples in the data set; unexpected rules indicate incomplete data. We propose an interactive exploration process that guides editors to identify false counterexamples and provide missing data. This procedure forms the basis of [The Exploration Game](🤍 a game in which players can explore the implicational knowledge of set of Wikidata items of their choosing. We hope that the discovered knowledge may be useful not only for the insights gained, but also as a basis from which to create entity schemata. The talk will introduce the notions of Implicational Knowledge, describe how Formal Context Analysis may be employed to extract implications, and showcase the interactive exploration process. Maximilian Marx Tom Hanika 🤍
🤍 Seit fünf Jahren setzen sich innerhalb des Netzwerks [„Code for Germany“](🤍) in ganz Deutschland rund 300 Ehrenamtliche für offene Daten ein und bauen damit Anwendungen für alle. Auch 2019 ist bei uns einiges passiert, was wir euch hier vorstellen wollen. Wir haben uns beispielsweise mit Daten zu Umwelt, Politik und jeder Menge Kartenmaterial beschäftigt und viele neue Projekte am Start. Manche glänzen schon richtig, andere suchen noch Unterstützung. Im Talk erklären wir, was offene Daten eigentlich sind, was man daraus bauen kann und wie man bei uns mitmachen kann. [Code for Germany](🤍) ist ein Netzwerk von Gruppen ehrenamtlich engagierter Freiwilliger. Wir nutzen unsere Fähigkeiten, um unsere Städte und das gesellschaftliche Miteinander positiv zu gestalten. Wir setzen uns für mehr Transparenz, Offene Daten und Partizipation in unseren Städten ein. Wir vermitteln insbesondere zwischen Zivilgesellschaft, Verwaltung und Politik und nutzen unsere Fähigkeiten, um die Kommunikation zwischen diesen zu verbessern und notwendige Impulse zu setzen, damit die Möglichkeiten der offenen und freien Digitalisierung so vielen Menschen wie möglich zugute kommen. Julia 🤍
🤍 An introduction to querying linked data, using the SPARQL query language and the free knowledge base Wikidata. Which films starred more than one future head of government? What’s the largest city with a female mayor? And when did women finally outnumber Johns in the House of Commons? These are the kinds of questions that linked data can answer. This workshop will give an introduction to the SPARQL query language, showing how it can be used to answer these and other questions, using the free knowledge base Wikidata as the data source. Lucas Werkmeister 🤍
🤍 Many schools in Germany choose to distribute their substitute plans via a proprietary platform. The provided client software is not very pleasurable to use and inconveniences users with its dependency on Google Play Services. That's why I develop a free client for Android called DSBDirect, which is able to display plans in a nice, filtered way. Many schools in Germany choose to distribute their substitute plans via the proprietary [[DSB platform]](🤍 The provided client software is not very pleasurable to use and inconveniences users with its dependency on Google Play Services. That's why I develop a free client for Android called DSBDirect, which is able to display plans in a nice, filtered way. Since they noticed my app, the company operating DSB has been obfuscating their various endpoints more and more in an attempt to prevent my app from working, while on the other hand not being very competent at security. It's a cat-and-mouse game. Fynn 🤍
🤍 This talk provides an overview of the state of Free and Open Source Software (FOSS) within the various European scientific communities. Based on this we will try to identify stakeholders, common goals and potential policy proposals. The principles of Free and Open Source Software (FOSS) are well aligned with the core tenets of science, i.e., the sharing of knowledge and the demand for reproducibility of results. Nevertheless, FOSS is still rather the exception than the rule for the majority of scientific domains. In this session we will discuss the state of FOSS within the various European scientific communities. Based on this we will try to identify stakeholders, common goals and potential policy proposals. purine:bitter 🤍
🤍 The ever-growing Wikidata contains a vast amount of factual knowledge. More complex knowledge, however, lies hidden beneath the surface: it can only be discovered by combining the factual statements of multiple items. Some of this knowledge may not even be stated explicitly, but rather hold simply by virtue of having no counterexamples present on Wikidata. Such implicit knowledge is not readily discoverable by humans, as the sheer size of Wikidata makes it impossible to verify the absence of counterexamples. We set out to identify a form of implicit knowledge that is succinctly representable, yet still comprehensible to humans: implications between properties of some set of items. Using techniques from Formal Concept Analysis, we show how to compute such implications, which can then be used to enhance the quality of Wikidata itself: absence of an expected rule points to counterexamples in the data set; unexpected rules indicate incomplete data. We propose an interactive exploration process that guides editors to identify false counterexamples and provide missing data. This procedure forms the basis of [The Exploration Game](🤍 a game in which players can explore the implicational knowledge of set of Wikidata items of their choosing. We hope that the discovered knowledge may be useful not only for the insights gained, but also as a basis from which to create entity schemata. The talk will introduce the notions of Implicational Knowledge, describe how Formal Context Analysis may be employed to extract implications, and showcase the interactive exploration process. Maximilian Marx Tom Hanika 🤍
🤍 Getting your itinerary presented in a unified, well structured and always up to date fashion rather than as advertisement overloaded HTML emails or via countless vendor apps has become a standard feature of digital assistants such as the Google platform. While very useful and convenient, it comes at a heavy privacy cost. Besides sensitive information such as passport or credit card numbers, the correlation of travel data from a large pool of users exposes a lot about people's work, interests and relationships. Just not using such services is one way to escape this, or we build a privacy-respecting alternative ourselves! Standing on the shoulders of KDE, Wikidata, Navitia, OpenStreetMap and a few other FOSS communities we have been exploring what it would take to to build a free and privacy-respecting travel assistant during the past two years, resulting in a number of building blocks and the "KDE Itinerary" application. In this talk we will look at what has been built, and how, and what can be done with this now. In particular we will review the different types of data digital travel assistants rely on, where we can get those from, and at what impact for your privacy. The most obvious data source are your personal booking information. Extracting data from reservation documents is possible from a number of different input formats, such as emails, PDF files or Apple Wallet passes, considering structured annotations and barcodes, but also by using vendor-specific extractors for unstructured data. All of this is done locally on your own devices, without any online access. Reservation data is then augmented from open data sources such as Wikidata and OpenStreetMap to fill in often missing but crucial information such as timezones or geo coordinates of departure and arrival locations. And finally we need realtime traffic data as well, such as provided by Navitia as Open Data for ground-based transport. Should the author fail to show up to this presentation it might be that his Deutsche Bahn ticket rendering code still needs a few bugfixes ;-) Volker Krause 🤍
🤍 A lightning talk about technical contributions in Wikimedia projects that we can currently measure and the challenges that we face. Statistics can help to better understand communities and their needs. This lightning talk shows how Wikimedia uses the free and open source software "GrimoireLab" to get some data about its technical contributor base, and also covers some of the challenges that we face when it comes to measuring. Andre Klapper 🤍
🤍 Did you ever want to develop cross-platform application from one single code base? Are you afraid to get worse performance than with native code? Flutter may help you! Flutter is an open-source cross platform framework which allows you to create native applications. As is does not use JavaScript it won't require a hole WebView in background. Due to this and the incredible easy syntax it's one most advanced frameworks for applications running on mobile devices, in the web and on desktops. In this talk, I will introduce the basics of Flutter, what's different to other frameworks and some details about its structure. Der mit dem Zopf (The one with the braid) 🤍
🤍 Grundlagenwissen zum Urheberrecht CC-Lizenzen und das Urheberrecht. Kurze Einführung wie CC-Lizenzen im Urheberrecht verankert sind. John 🤍
🤍 An introduction to querying linked data, using the SPARQL query language and the free knowledge base Wikidata. Which films starred more than one future head of government? What’s the largest city with a female mayor? And when did women finally outnumber Johns in the House of Commons? These are the kinds of questions that linked data can answer. This workshop will give an introduction to the SPARQL query language, showing how it can be used to answer these and other questions, using the free knowledge base Wikidata as the data source. Lucas Werkmeister 🤍
🤍 Getting your itinerary presented in a unified, well structured and always up to date fashion rather than as advertisement overloaded HTML emails or via countless vendor apps has become a standard feature of digital assistants such as the Google platform. While very useful and convenient, it comes at a heavy privacy cost. Besides sensitive information such as passport or credit card numbers, the correlation of travel data from a large pool of users exposes a lot about people's work, interests and relationships. Just not using such services is one way to escape this, or we build a privacy-respecting alternative ourselves! Standing on the shoulders of KDE, Wikidata, Navitia, OpenStreetMap and a few other FOSS communities we have been exploring what it would take to to build a free and privacy-respecting travel assistant during the past two years, resulting in a number of building blocks and the "KDE Itinerary" application. In this talk we will look at what has been built, and how, and what can be done with this now. In particular we will review the different types of data digital travel assistants rely on, where we can get those from, and at what impact for your privacy. The most obvious data source are your personal booking information. Extracting data from reservation documents is possible from a number of different input formats, such as emails, PDF files or Apple Wallet passes, considering structured annotations and barcodes, but also by using vendor-specific extractors for unstructured data. All of this is done locally on your own devices, without any online access. Reservation data is then augmented from open data sources such as Wikidata and OpenStreetMap to fill in often missing but crucial information such as timezones or geo coordinates of departure and arrival locations. And finally we need realtime traffic data as well, such as provided by Navitia as Open Data for ground-based transport. Should the author fail to show up to this presentation it might be that his Deutsche Bahn ticket rendering code still needs a few bugfixes ;-) Volker Krause 🤍
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