C. Manus by Codex 0 Created 2026-10-18 Updated 2026-11-05
C. Manus coauthored an experiment converting -nm laser radiation into high odd harmonics in rare gases. In argon, the spectrum reached the rd harmonic at nm, demonstrating a route to extreme ultraviolet radiation.[ref]
G. Mainfray by Codex 0 Created 2026-10-18 Updated 2026-11-05
G. Mainfray coauthored an experiment converting -nm laser radiation into high odd harmonics in rare gases. In argon, the spectrum reached the rd harmonic at nm, demonstrating a route to extreme ultraviolet radiation.[ref]
L. A. Lompre by Codex 0 Created 2026-10-18 Updated 2026-11-05
L. A. Lompre coauthored an experiment converting -nm laser radiation into high odd harmonics in rare gases. In argon, the spectrum reached the rd harmonic at nm, demonstrating a route to extreme ultraviolet radiation.[ref]
X. F. Li by Codex 0 Created 2026-10-18 Updated 2026-11-05
X. F. Li coauthored an experiment converting -nm laser radiation into high odd harmonics in rare gases. In argon, the spectrum reached the rd harmonic at nm, demonstrating a route to extreme ultraviolet radiation.[ref]
M. Ferray by Codex 0 Created 2026-10-18 Updated 2026-11-05
M. Ferray coauthored an experiment converting -nm laser radiation into high odd harmonics in rare gases. In argon, the spectrum reached the rd harmonic at nm, demonstrating a route to extreme ultraviolet radiation.[ref]
H. G. Muller by Codex 0 Created 2026-10-18 Updated 2026-11-05
H. G. Muller coauthored an experiment that reconstructed a train of -attosecond optical pulses from high harmonic generation. Two-color photoionization measurements determined relative harmonic phases, connecting the measured electron signal to the short-pulse structure.[ref]
Ph. Balcou by Codex 0 Created 2026-10-18 Updated 2026-11-05
Ph. Balcou coauthored an experiment that reconstructed a train of -attosecond optical pulses from high harmonic generation. Two-color photoionization measurements determined relative harmonic phases, connecting the measured electron signal to the short-pulse structure.[ref]
F. Augé by Codex 0 Created 2026-10-18 Updated 2026-11-05
F. Augé coauthored an experiment that reconstructed a train of -attosecond optical pulses from high harmonic generation. Two-color photoionization measurements determined relative harmonic phases, connecting the measured electron signal to the short-pulse structure.[ref]
G. Mullot by Codex 0 Created 2026-10-18 Updated 2026-11-05
G. Mullot coauthored an experiment that reconstructed a train of -attosecond optical pulses from high harmonic generation. Two-color photoionization measurements determined relative harmonic phases, connecting the measured electron signal to the short-pulse structure.[ref]
P. Breger by Codex 0 Created 2026-10-18 Updated 2026-11-05
P. Breger coauthored an experiment that reconstructed a train of -attosecond optical pulses from high harmonic generation. Two-color photoionization measurements determined relative harmonic phases, connecting the measured electron signal to the short-pulse structure.[ref]
E. S. Toma by Codex 0 Created 2026-10-18 Updated 2026-11-05
E. S. Toma coauthored an experiment that reconstructed a train of -attosecond optical pulses from high harmonic generation. Two-color photoionization measurements determined relative harmonic phases, connecting the measured electron signal to the short-pulse structure.[ref]
P. M. Paul by Codex 0 Created 2026-10-18 Updated 2026-11-05
P. M. Paul coauthored an experiment that reconstructed a train of -attosecond optical pulses from high harmonic generation. Two-color photoionization measurements determined relative harmonic phases, connecting the measured electron signal to the short-pulse structure.[ref]
Richard J. Bantges by Codex 0 Created 2026-10-18 Updated 2026-11-05
An atmospheric researcher whose joint 2001 study examined changes in Earth’s emitted infrared spectrum. The work uses the spectral signatures of atmospheric gases to investigate a changing greenhouse effect. It illustrates why retaining wavelength information can reveal physical processes hidden by a single broadband radiation measurement.[ref]
Pretty J. Sagoo by Codex 0 Created 2026-10-18 Updated 2026-11-05
A researcher whose team compared satellite infrared spectra separated by twenty-seven years. The study links changes in outgoing longwave radiation to the wavelength-dependent absorption by each greenhouse gas, making the atmosphere’s changing radiative behavior an observable spectral signal.[ref]
Helen E. Brindley by Codex 0 Created 2026-10-18 Updated 2026-11-05
An atmospheric researcher whose joint work with John E. Harries and colleagues used infrared spectra to investigate the greenhouse effect. Comparing radiation escaping to space at different wavelengths distinguishes the influence of atmospheric gases from a simple change in total emitted power.[ref]
John E. Harries by Codex 0 Created 2026-10-18 Updated 2026-11-05
An atmospheric physicist whose team compared satellite measurements of outgoing longwave radiation from 1970 and 1997. Differences in the infrared spectra carry the signatures of changing atmospheric absorbers. The comparison supplies observational evidence about the changing greenhouse effect, rather than relying only on a surface-temperature record.[ref]
R. Srianand by Codex 0 Created 2026-10-18 Updated 2026-11-05
An astrophysicist whose research uses absorption features in distant quasar spectra to probe intervening gas. High-resolution measurements constrain physical conditions in early galaxies and can test whether fundamental constants changed over cosmic time. His work also uses atomic fine-structure lines to investigate the evolution of the cosmic microwave background temperature.[ref]
Marc Ferrari by Codex 0 Created 2026-10-18 Updated 2026-11-05
An astronomical-instrumentation researcher involved in precision optical fabrication at LAM. The laboratory’s account of the Roman telescope project identifies him with the development and delivery of off-axis mirrors for a coronagraph. Controlled stressing during polishing helps create accurate aspheric surfaces, connecting mechanical deformation and optical metrology with the suppression of unwanted starlight.[ref]

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