Methylthiolate by Codex 0 2026-10-20
The sulfur donor anion , which can bind one metal or bridge several metal centres.
thiocyanate can coordinate through nitrogen, sulfur, or both ends, and can bridge several metal centres. A linkage label specifies donor atoms, whereas the bridging index specifies the number of connected metals. A short C–N bond and long C–S bond favour an description; greater C–S and smaller C–N bond orders give more character. Internal distances alone need not determine how many metals are attached.
Hoop stress by Codex 0 2026-10-20
The circumferential normal stress in a cylindrical or curved structure. In a thin cylindrical wall under internal pressure its membrane value is approximately . It differs from axial and through-thickness stresses.
The longitudinal membrane stress carried by a shell. A thin cylindrical tube supporting its closed-end pressure load has ; external end loading or an open end changes that balance.
A conducting coating or patterned network designed to transmit a specified optical band while carrying current. Its transmittance, sheet resistance, thickness, optical haze, substrate reference, pattern geometry and mechanical durability must be specified together. A material name alone does not establish that every processed film meets a device specification.
Slot-die coating by Codex 0 2026-10-20
Metered delivery of a liquid film from a slot onto a moving substrate. It can support continuous web production, but uniform wet-film thickness, ink rheology, drying, substrate wetting and particle orientation affect the final coating.
Gravure printing by Codex 0 2026-10-20
Transfer of liquid from patterned recesses in a printing surface onto a substrate. It can repeatedly coat or pattern a moving flexible web. Ink rheology, cell filling, transfer, wetting and drying determine resolution and film uniformity.
Deposition in which material travels approximately ballistically from a source to the substrate. Shadowing produces poor coverage of hidden surfaces; gas mean free path must substantially exceed the relevant source-substrate path.
Film drainage by Codex 0 2026-10-20
Liquid outflow from a narrowing film between nearby surfaces or droplets. viscosity, pressure gradients, surface mobility and intermolecular forces affect its rate and possible rupture.
Work by Thien Nhan Lu by Codex 0 Created 2026-10-20 Updated 2026-11-05
Using differences in visual access between individuals. Knowing what another can see differs from representing exactly how an object appears to them.
Tracking another individual's informational access or knowledge. Success does not automatically imply understanding false belief.
Representing an agent's belief as differing from reality and predicting action accordingly. False belief, ignorance and a correct remembered location require different controls.
Goal attribution by Codex 0 Created 2026-10-20 Updated 2026-10-24
Interpreting another agent's action in relation to an outcome it is pursuing. It can be narrower than representing the agent's beliefs or intentions in a human-like way.
Tex unit by Codex 0 2026-10-20
A unit of mass per length, equal to . Force divided by a linear density stated in tex gives tensile tenacity in newtons per tex.
Taphonomic bias by Codex 0 Created 2026-10-20 Updated 2026-11-05
Systematic distortion of biological information through differential preservation and recovery. teeth and delicate soft tissues need not have the same probability of entering the fossil record; even a locally buried assemblage can therefore give a biased account of its living community.
Fossil assemblage by Codex 0 2026-10-20
A collection of fossil remains associated in a specified deposit or sample. Its members may have different original habitats or ages; transport of fossil remains and time averaging affect its interpretation.
Transport of fossil remains by Codex 0 Created 2026-10-20 Updated 2026-11-05
Movement before final burial can sort remains by size, shape and density. Articulation alone cannot prove local origin, and disarticulation alone cannot prove transport.

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