Atmospheric optical phenomena refer to various visual effects that occur in the atmosphere due to the interaction of light with particles, gases, and other elements in the Earth's atmosphere. These phenomena can create spectacular and sometimes striking displays in the sky. Some common types of atmospheric optical phenomena include: 1. **Rainbows**: Formed by the refraction, dispersion, and reflection of sunlight in water droplets, resulting in a spectrum of colors in the sky.
Dawn by Wikipedia Bot 0
"Dawn" can refer to several different concepts depending on the context: 1. **Natural Phenomenon**: Dawn is the time of day when the sun begins to rise, marking the transition from night to day. It is characterized by the gradual illumination of the sky and often includes beautiful colors as the sun's rays scatter through the atmosphere.
Sandia National Laboratories by Ciro Santilli 37 Updated +Created
Ecological processes are the natural mechanisms and interactions that occur within ecosystems, influencing the distribution, abundance, and dynamics of organisms and their environments. These processes can impact biodiversity, community structure, nutrient cycling, energy flow, and the overall functioning of ecosystems. Key ecological processes include: 1. **Photosynthesis**: The process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose.
Meteorological phenomena refer to observable weather events and characteristics that result from atmospheric conditions. These phenomena include a wide range of occurrences that can be local, regional, or global in nature. Some common meteorological phenomena include: 1. **Rain**: Precipitation in the form of liquid droplets, which occurs when moisture in the atmosphere condenses and falls to the ground. 2. **Snow**: Precipitation in the form of ice crystals that occurs when temperatures are below freezing.
Physics bibliography by Ciro Santilli 37 Updated +Created
Faculty of Khan by Ciro Santilli 37 Updated +Created
An air shower in physics refers to a cascade of secondary particles produced when a high-energy cosmic ray, typically a proton or atomic nucleus, interacts with the Earth's atmosphere. When these cosmic rays, which can have energies many orders of magnitude greater than that achievable in human-made particle accelerators, collide with atmospheric molecules, they produce a wide variety of secondary particles, including pions, muons, electrons, and photons.
Reverse waterfall by Wikipedia Bot 0
The term "reverse waterfall" can refer to various concepts depending on the context in which it is used. Here are a couple of interpretations: 1. **Project Management/Software Development**: In some contexts, particularly in agile methodologies, a "reverse waterfall" can refer to a non-linear approach to project development that contrasts with the traditional waterfall model. The waterfall model typically involves a linear, sequential design process where each phase must be completed before the next begins.
Famous conjecture by Ciro Santilli 37 Updated +Created
This section groups conjectures that are famous, solved or unsolved.
They are usually conjectures that have a strong intuitive reasoning, but took a very long time to prove, despite great efforts.
Faraday Institute for Science and Religion by Ciro Santilli 37 Updated +Created
Faraday's law of induction by Ciro Santilli 37 Updated +Created
Fashion MNIST by Ciro Santilli 37 Updated +Created
Same style as MNIST: 28x28 grayscale images, but with clothes rather than hand written digits.
It was designed to be much harder than MNIST, and more representative of modern applications, while still retaining the low resolution of MNIST for simplicity of training.
https://web.archive.org/web/20250511105702im_/https://github.com/zalandoresearch/fashion-mnist/raw/master/doc/img/fashion-mnist-sprite.png
Aurora by Wikipedia Bot 0
"Aurora" can refer to several different things depending on the context. Here are a few common meanings: 1. **Natural Phenomenon**: In the context of natural phenomena, an aurora refers to the auroras, specifically Aurora Borealis (Northern Lights) and Aurora Australis (Southern Lights). These are natural light displays predominantly seen in high-latitude regions around the Arctic and Antarctic.
Auroral chorus by Wikipedia Bot 0
Auroral chorus is a natural phenomenon associated with the auroras, which are spectacular light displays occurring primarily in polar regions. These visual displays are caused by the interactions between charged particles from the solar wind and Earth's magnetic field and atmosphere. The term "auroral chorus" specifically refers to a type of natural radio wave emissions that occur in the vicinity of the auroras.
fast.ai by Ciro Santilli 37 Updated +Created
A pair of Austrailan deep learning training provider/consuntants that have produced a lot of good free learning materials:Authors:
feathersjs/feathers-chat by Ciro Santilli 37 Updated +Created

Pinned article: ourbigbook/introduction-to-the-ourbigbook-project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact