For almost 20 years, the GCFGlobal.org program has helped millions around the world learn the essential skills they need to live and work in the 21st century by offering self-paced online courses.
We encourage you to explore our courses available here and on YouTube. We highly recommend creating a free account to unlock a range of services, including course tracking, viewing history, accessing your completion certificates and much more. By creating a free account, you can enhance your learning experience and take full advantage of the resources we offer.
From Microsoft Office, tp email, reading, math, and more—GCFGlobal.org offers free learning resources on more than 200 topics, including more than 2,300 lessons and more than 2,000 videos, completely free.
We all have outside responsibilities, so we make it easy for you to learn at your own pace, on your own time.
An interactive visualization of the radio spectrum. Search for frequencies, scroll around the bands, change geographic regions to see other bandplans.
Free books to read and enjoy online. General interest hypertext-books and technical hyper-textbooks — physics, mathematics, cycling, education, media, skepticism, West Africa, and more.
Given a frequency, it'll calculate the wavelength and wavenumber (the magnitude of the wave).
For the record, wavelength == wave velocity / frequency
λ == 299,792,458 m/s / Hz
Online converter that substitutes the Mentat letter glyphs for English ones. Or you can download the font as a .ttf file and install it locally.
CSVFiddle is a free tool to explore and share insights from CSV files using SQL. You can import data, write SQL, then instantly share it with anyone. Everything runs 100% in-browser, so the data you import and the queries you write are never sent to a web server.
CSVFiddle querying is powered by DuckDB-Wasm, a WebAssembly implementation of the popular OLAP database, DuckDB. Any SQL you can run in DuckDB should be able to run in CSVFiddle. This means that you'll run into its quirks more often than you think.
The SQL editor features autocomplete for common SQL keywords/snippets and the table names/columns imported into a workspace. Click 'Share Workspace' in CSVFiddle to generate a link you can share with anyone. Queries and references to CSV data are encoded in the URL fragment, so the data are never sent to CSVFiddle servers.
Give it the number and capacity of drives, the RAID level, and maybe some options and it'll calculate how much space your btrfs volume will have.
From Wikipedia: Oblique Strategies (subtitled Over One Hundred Worthwhile Dilemmas) is a card-based method for promoting creativity jointly created by musician/artist Brian Eno and multimedia artist Peter Schmidt, first published in 1975. Physically, it takes the form of a deck of 7-by-9-centimetre (2.8 in × 3.5 in) printed cards in a black box. Each card offers a challenging constraint intended to help artists (particularly musicians) break creative blocks by encouraging lateral thinking.
This is a web page that randomly picks one of the oblique strategies and shows it to you.
Queer Liberation Library (QLL) is fighting to build a vibrant, flourishing queer future by connecting LGBTQ+ people with literature, information, and resources that celebrate the unique and empowering diversity of our community.
This LED calculator will help you design your LED array and choose the best current limiting resistors values. To get started, input the required fields and hit "Design Circuit." Does the math for you, will output either a wiring diagram or schematic. Useful because it gives you defaults to start playing around with (who knows how many mA an LED draws off the top of their head? even I don't.)
RadioFreeSociety is an unauthorized pirate radio station. We're open to all genres and artists, and hope to put out more stations soon. We'll be here as long as we can get away with it. You'll find a diverse mix of music here, with big names and unknowns. We're aiming for a chaotic energy with very anarchic qualities.
If you're an artist, in a band, or otherwise make cool sounds, feel free to send them on over via email to music@radiofreesociety.com and I'll load them up into the station! I have a lot of big names in the rotation right now, but I'd really like to support the smaller artists and intruduce folks to some new music and up and coming artists and also just regular music for and from regular people.
This creates GAME OVER/YOU DIED screens as seen in Sierra Online's SCI engine, as well as lots of other fake videogame screenshots from many, many games.
Welcome to the Procedural Content Generation in Games book. This is, as far as we know, the first textbook about procedural content generation in games. As far as we know it is also the first book-length overview of the research field. We hope you find it useful, whether you are studying in a course, on your own, or are a researcher.
We wrote this book for two reasons. The first reason was that all three of us were doing research on PCG in games, and we wanted a good overview. As we come from somewhat different methodological backgrounds, we realized that many researchers did not know about methods that had been developed in other communities. For example, researchers using logic programming and those using evolutionary computation might not know that the other type of algorithms was applicable to the same problem; and researchers coming from computer graphics might not even know that artificial intelligence methods are being used for PCG problems. As PCG in games has just recently started to be seen as its own research field, this was not surprising, but pointed to the need for a book such as this one.
The second reason was that we were teaching a course on PCG (in fact, entitled simply “Procedural Content Generation in Games”) at the IT University of Copenhagen, where at the time the three of us were faculty members. When this course was started in 2010, it was probably the first of its kind in the world. Naturally, there was no textbook to teach it from, so we assembled a syllabus out of academic papers, mostly recent ones. As we taught the course in subsequent years, the syllabus matured, and we felt that we were ready to turn the content of our lectures into a textbook.
This is a playground for learning and testing CSS selectors in a visual way. Start by selecting a playground or let's start with a random selector.
Each letter is a glass cane, a cylinder of glass made by pulling and twisting an arrangement of straight lines of colored glass embedded within clear glass. The top view shows the initial extruded arrangement, which is an easily recognized letter. The side view shows the pulled and twisted result, as simulated by our Virtual Glass software, and forms a challenging puzzle to decipher.
Pick the color stripes, pick the number of stripes, and it'll tell you what value the resistor you have in hand is.
Edit, preview and share Mermaid charts/diagrams. Edit and preview flowcharts, sequence diagrams, gantt diagrams in real time. Save the result as a .svg file. Get a link to a viewer of the diagram so that you can share it with others. Get a link to edit the diagram so that someone else can tweak it and send a new link back
Rogule is a minimalist online Roguelike game you play in your web browser. Everyone gets the same dungeon each day. You get one chance to beat each day's dungeon. It is free to play.
As roguelikes go, this one is surprisingly playable. This is the first time I lasted longer than three rounds. Definitely the kind of game you can pick up and put down when you're done.
Add dynamic content, forms or personalization to your static site, manage smart home, monitor server room temperatures in hundreds of locations using Raspberry Pi, or simply play with the API - JsonStorage is super simple and scales up to your needs.
We help you find European alternatives for digital service and products, like cloud services and SaaS products.