Integer partitions refer to the ways of expressing a positive integer as the sum of one or more positive integers. The order of terms in each sum does not matter; for example, the two sums \(4 = 1 + 1 + 1 + 1\) and \(4 = 2 + 2\) represent two distinct partitions of the integer 4.
Cartography journals are academic publications that focus on the study and practice of cartography, which is the art and science of map-making. These journals serve as platforms for researchers, practitioners, and educators to share their findings, innovations, methodologies, and theoretical advancements related to cartography and geospatial information. Topics covered in cartography journals may include: 1. **Map Design and Visualization**: Studies on how to effectively design maps for clarity, aesthetics, and usability.
Chemical Oxygen Demand (COD) is a measure of the amount of organic compounds in water or wastewater that can be oxidized by a strong chemical oxidant. It is an important parameter used to evaluate water quality, particularly in the context of wastewater and effluent treatment. COD is expressed in units of milligrams of oxygen consumed per liter of sample (mg O₂/L).
Alessandro Padoa is primarily known as an Italian mathematician, particularly recognized for his work in mathematical logic and related fields.
Systole refers to the phase of the cardiac cycle during which the heart muscles contract, resulting in the pumping of blood out of the heart. This phase occurs in both the atria and the ventricles but is most commonly associated with ventricular systole, where the ventricles contract to push blood into the aorta and pulmonary artery.

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