DOE-HDBK-1015/2-93, Reactor Water Chemistry, CH-03 page24: Table2 hydrogen isotopes and Disintegration subsection. Tritium beta decay yields helium-3 and an antineutrino; half-life table gives12.32years. Use approximate half-life only, not a claim of the latest evaluated value.
Leica Microsystems, 1 October 2014. Definition and physical preparation sections: frozen fracture, optional vacuum sublimation, oblique metal coating and carbon support; SEM block-face versus TEM replica. Cited only for physical/material preparation; biological examples are outside this worker scope. Author profile www.leica-microsystems.com/science-lab/authors/detail/gisela-hoeflinger/ verifies the byline and coating expertise, with labeled portrait.
Manufacturer technical terminology page: antigen-antibody recognition, molecular localization and electron-dense labeling in transmission electron microscopy. The Japanese heading is 免疫電顕法; English explanation appears on the same page.
Mineralization pathways into inorganic products; no claim that every utilization pathway stores carbon permanently.
Technology pathways: externally powered reduction to intermediates and subsequent fuel/product manufacture.
Consulted section 3, equations 14–15, printed pp. 4–5: constant proper accelerations at the front and rear of a translationally Born-rigid rod differ by its proper length. Title page identifies Jerrold Franklin, Temple University, and 7 June 2012. Only this translational-acceleration derivation is used.
Proceedings of the National Academy of Sciences 12, 207–214. Original byline: Cecil D. Murray, Department of Biology, Bryn Mawr College.
Inspected original scanned paper, printed pp. 209–212, equations 1–7: fixed-flow pumping cost, volume maintenance cost, radius optimization and cubic flow-radius law. The concept article supplies the branching consequence and an equal-daughter example.
American Journal of Physics 45, 3–11. The original article credits E. M. Purcell, Lyman Laboratory, Harvard University. This is the 1977 journal version of the earlier talk.
Inspected original article, printed pp. 3–4: Reynolds-number scaling and negligible coasting of microorganisms. Existing Edward Mills Purcell/work records are reused.
Original teaching module published on the FAMUS site; no personal byline or publication date established.
Inspected sections The origin of the ultrasound image and Ultrasound modes: A–mode, B–mode and M–mode; Figures 7 and 11–13 distinguish return-time depth conversion, amplitude display, brightness image and one-line motion display. Only imaging physics is used.
By Julius Robert Mayer. Annalen der Chemie und Pharmacie 42(2), pp. 233–240; doi:10.1002/jlac.18420420212.
Original German paper Bemerkungen über die Kräfte der unbelebten Natur (1842). The publisher confirms volume 42; the English translation page incorrectly lists 43. English translation by G. C. Foster (1862), reproduced in Magie (1935). Final paragraphs compare compression work and heat capacities.
Original German monograph and institutional metadata. Archive DOI 10.18452/378 identifies the digital record. Physical-conservation derivation must retain conservative-force assumptions.
Open Solid State Notes, exercise 1 solutions, parts 2–6. Gives the mass-and-spring equations and displacement vectors for symmetric and antisymmetric stretching modes of a linear triatomic molecule, including the stationary centre-of-mass condition and the spectroscopy convention for their names.

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