Abraham Pais by Ciro Santilli 40 Updated 2025-07-16
This due is a beast, he knows both the physics and the history of physics, and has the patience to teach it. What a blessing: Section "How to teach and learn physics".
Jeff Bezos by Ciro Santilli 40 Updated 2025-07-16
Jeff has spoken a lot in public about Amazon, perhaps even more than other comparable founders, see e.g. Section "History of Amazon". Kudos for that.
Figure 1.
Jeff Bezos Unveiling the Blue Origin Lunar Lander
. Source.
Video 1.
Has the laugh of Jeff Bezos changed as he got rich? by Barış Aktaş (2020)
Source.
Video 2.
Order from Bulgaria by Jeff Bezos
. Source. From a 2002 talk at MIT.
Blade server by Ciro Santilli 40 Updated 2025-07-16
Figure 1. Source. Good image from Wikimedia Commons. In this one we can see how the blades are put vertically, and you get several of them per horizontal rack space, instead of a tipical single rack server going all the way horizontally.
Video 1.
HP Blade Server by Brian Kirsch (2013)
Source.
In the video we can see that it contains RAM, disk storage, we are told about two CPUs, and networking interfaces, so it is a complete computer on its own. He also explains that unlike typical rack servers, each blade unit does not have its own coolers and power supply related hardware, which goes instead on the chassis.
Big O notation family by Ciro Santilli 40 Updated 2025-07-16
This is a family of notations related to the big O notation. A good mnemonic summary of all notations would be:
CLCNKB is a gene that encodes the Chloride Channel 2, which is part of the CLC (Chloride Channel) family of proteins. CLCNKB is primarily expressed in the kidney and plays a crucial role in regulating chloride ion transport in epithelial tissues. This gene is involved in kidney function, specifically in the reabsorption of chloride ions, which is essential for maintaining fluid and electrolyte balance in the body.
CLIC4, or Chloride Intracellular Channel 4, is a protein that is part of the CLIC (Chloride Intracellular Channel) family. It functions primarily as a chloride ion channel, playing a role in cellular processes such as ion transport, volume regulation, and cell signaling. CLIC4 is unique among its family members because it is also believed to have functions related to cell proliferation and differentiation, as well as involvement in various pathological conditions, including cancer.
Cyclic nucleotide-gated channel alpha 3 (CNGA3) is a protein that forms a part of the ion channel complex involved in sensory transduction, particularly in photoreceptors in the retina. It is one of the alpha subunits of the cyclic nucleotide-gated (CNG) channels, which are sensitive to cyclic nucleotides such as cyclic AMP (cAMP) and cyclic GMP (cGMP).
F15845 does not correspond to a widely recognized product, term, or concept in my training data. It might be a specific identifier, a product code, a model number, or something relevant to a particular field. If you can provide more context or specify the category (e.g., technology, science, literature, etc.
ITPR1, or Inositol 1,4,5-trisphosphate receptor type 1, is a protein that in humans is encoded by the ITPR1 gene. It is part of a family of inositol trisphosphate receptors that play a critical role in cellular signaling.

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