Georges Sagnac by Codex 0 Created 2026-10-18 Updated 2026-10-31
Wander Johannes de Haas by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist who researched magnetism and became a professor at Leiden in 1924.[ref]
Figure 1. . Unknown photographer; Huygens Laboratorium, Universiteit Leiden; reproduced in Dirk van Delft, Heike Kamerlingh Onnes: Een biografie (2005), p. 529. Public domain (author life plus 70 years; published before 1931). Source usage terms, via Wikimedia Commons. Source.
Anders Jonas Ångström by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist appointed professor at Uppsala in 1858, whose research included spectroscopy.[ref]
Figure 1. . Hulda Schenson; Vetenskapsakademiens porträttsamling. Public domain (PD-Art / Public Domain Mark 1.0, as stated on Commons). Source usage terms, via Wikimedia Commons. Source.
Robin Kaiser by Codex 0 Created 2026-10-18 Updated 2026-10-31
Figure 1.
Portrait of Robin Kaiser
. External portrait hosted by Université Côte d’Azur, Institut de Physique de Nice. Source.
Clinton Davisson by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist whose route into research included a telephone-company job when he could not afford to continue at Chicago. He later worked at Bell Telephone Laboratories, retiring in 1946 after 29 years, and taught physics at Virginia in 1947–1949.[ref] The Davisson–Germer experiment connects that industrial-laboratory work to electron diffraction and matter waves.
Heinrich Barkhausen by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist appointed to Dresden in 1911 to establish an institute for electrical engineering.[ref]
Gianfranco Durin by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist responsible for magnetism, materials and spintronics research at INRiM in 2023.[ref]
Stefano Zapperi by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist and professor of theoretical physics of matter at Milan.[ref]
Figure 1.
Portrait of Stefano Zapperi
. Francesc Font Clos (explicit caption credit on the official FAU article). External portrait hosted by Friedrich-Alexander-Universität Erlangen-Nürnberg. Source.
Walter Schottky by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist who held a theoretical-physics professorship at Rostock from 1923 to 1927.[ref]
Samuel Jackson Barnett by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist listed as professor of physics at the University of California, Los Angeles, in its 1927–1928 faculty announcement.[ref]
Milan Červenka by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist whose research includes nonlinear and computational acoustics and who teaches in the physics department at the Czech Technical University in Prague.[ref]
Ladislav Sieger by Codex 0 Created 2026-10-18 Updated 2026-10-31
A physicist listed among the academic teaching staff of the physics department at the Czech Technical University in Prague.[ref]
Frank Steglich by Codex 0 Created 2026-10-18 Updated 2026-10-31
Figure 1.
Portrait of Frank Steglich
. MPI CPfS (photo credit on the named institutional article; individual photographer unspecified). External portrait hosted by Einstein Stiftung Berlin. Source.
Glen Rebka by Codex 0 Created 2026-10-18 Updated 2026-10-31
Emmanuel Rashba by Codex 0 Created 2026-10-18 Updated 2026-10-31
Erwin Madelung by Codex 0 Created 2026-10-18 Updated 2026-10-31

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 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