Time translation symmetry is a concept in physics, particularly in the context of classical mechanics and field theory, that indicates that the laws of physics do not change over time. This means that the physical laws that govern a system remain invariant regardless of when the system is observed.
Social inequality by Ciro Santilli 40 Updated 2025-07-16
Ciro Santilli is extremely passionate about this issue, partly due to Ciro Santilli's self perceived compassionate personality.
Ciro Santilli's main approaches to reduce it:
We have to be careful not to make everyone poorer when trying to reduce inequality.
But as things stand as of 2020, increasing taxes on the very richest, and notably wealth tax, and investing it in free gifted education, seems like a safe bet to achieve any meaningful level of equal opportunity and meritocracy.
Polyphyly by Ciro Santilli 40 Updated 2025-07-16
Basically mean that parallel evolution happened. Some cool ones:
COVID-19 by Ciro Santilli 40 Updated 2025-07-16
COVID happens in two stages:
  • viral infection
  • inflammatory phase, where the body takes over, and sometimes harms itself. It seems that people are not generally contagious at this point?
This distinction is one of the reasons why separating the virus name (SARS-CoV-2) from the disease makes sense: the disease is much broader than the viral infection.
Human by Ciro Santilli 40 Updated 2025-07-16
wget ftp://ftp.ncbi.nlm.nih.gov/refseq/H_sapiens/annotation/GRCh38_latest/refseq_identifiers/GRCh38_latest_genomic.fna.gz
gunzip --keep GRCh38_latest_genomic.fna.gz
In Unified Modeling Language (UML), a **Package** is a mechanism used for organizing model elements. It acts as a container that can hold different types of UML elements, such as classes, interfaces, components, and other packages. The purpose of using packages is to manage the complexity of large models by grouping related elements together, thereby promoting modularization and reusability.
The S2G reactor, which stands for "Small Modular Reactor Generation 2," is a type of small modular reactor (SMR) that focuses on providing safer, more efficient, and scalable nuclear power solutions. While there isn’t specific information only under the label "S2G reactor," the concept of SMRs in general encompasses advanced nuclear technologies designed to address the limitations of traditional nuclear power plants.
Quarterland may refer to different things depending on the context, but it is not widely recognized as a prominent or specific entity in popular culture, geography, or history up to my last knowledge update in October 2023. It could potentially be a name used for a place, a fictional setting, a business, or a concept within a specific niche.
A square metre (m²) is a unit of area in the metric system. It is defined as the area of a square with sides that are each one metre long. The square metre is commonly used in various contexts, including real estate, agriculture, and construction, to measure spaces, land, and other two-dimensional surfaces. To put it into perspective, one square metre is equivalent to 10,000 square centimetres (cm²) and about 10.
In the context of computing, a syllable often refers to the smallest unit of sound in speech processing, but if you are asking about "Syllable" in relation to software or computing systems more generally, it likely pertains to a specific implementation or system in the field of computing. One notable reference is "Syllable OS," which is an open-source operating system that is designed to be lightweight and easy to use, aimed primarily at desktop computing.
In firearms terminology, "gauge" refers to a measurement that indicates the bore diameter of shotgun barrels. It is a standard used to categorize and describe shotguns, with the gauge number reflecting the size of the projectile used. The gauge number is derived from a historical method of measurement: it is the number of lead balls of a specific diameter that would weigh one pound.

Pinned article: 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 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . 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.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  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