jq by Ciro Santilli 37 Updated +Created
Yet another awk-like domain-specific language to do things from the CLI in a ridiculously short humber of character? Oh yes.
jq ignore missing attribute by Ciro Santilli 37 Updated +Created
echo '[{"a": 1, "b": 2}, {"b": 3}]' | jq '.[] | select(.a) | .a'
Output:
1
and no empty lines as desired.
Hierarchical Data Format by Ciro Santilli 37 Updated +Created
Unified Modeling Language by Ciro Santilli 37 Updated +Created
Standard Generalized Markup Language by Ciro Santilli 37 Updated +Created
XML predecessor.
Ideal electrode by Wikipedia Bot 0
An ideal electrode is a theoretical concept used in electrochemistry and other fields that describes a perfect electrode with specific characteristics. Here are some key features of an ideal electrode: 1. **Inertness**: An ideal electrode does not participate in any chemical reaction itself. It does not undergo any changes in composition or structure during the electrochemical process. 2. **Perfect Conductivity**: It has perfect electrical conductivity, allowing for the unhindered movement of electrons.
"Interface" typically refers to a scientific journal that focuses on interdisciplinary research within the fields of materials science, physics, and engineering, specifically emphasizing interfaces and their properties. The journal publishes research articles, reviews, and short communications that examine the behavior of materials at their boundaries or interfaces, which play critical roles in various physical phenomena and applications. The focus of the journal may include topics such as surface science, nanotechnology, coatings, and interactions between different materials.
IBM Generalized Markup Language by Ciro Santilli 37 Updated +Created
SGML predecessor.
ExifTool by Ciro Santilli 37 Updated +Created
Internal oxidation is a process that occurs in certain metals and alloys, particularly those that contain reactive elements such as aluminum or silicon. It involves the oxidation of the metal at or within its grain boundaries or internal structures rather than just on the surface. This can happen when the metal is exposed to an oxidizing environment, usually at elevated temperatures. In internal oxidation, oxygen or other oxidizing agents penetrate into the material, leading to the formation of oxides within the metal rather than a mere surface oxidation layer.
Nikolai Yefimov by Wikipedia Bot 0
Nikolai Yefimov is not a widely recognized figure in mainstream culture, history, or current events as of my last update in October 2023. It’s possible that he could refer to a lesser-known individual, a fictional character, or someone who has gained recognition after that date.
Take the gloves off by Ciro Santilli 37 Updated +Created
The International Society of Electrochemistry (ISE) is a professional organization dedicated to the advancement and promotion of electrochemical science and technology. Founded in 1949, the ISE serves as a platform for researchers, educators, and professionals in the field of electrochemistry to share knowledge, collaborate on research, and disseminate new findings. The society organizes events, including annual meetings and symposia, where members can present their research, attend lectures, and network with other professionals.
Mixed potential theory is a concept used primarily in electrochemistry to describe the behavior of electrochemical systems under various conditions. The theory provides a framework for understanding and predicting the potentials and reaction rates in systems where multiple redox reactions may occur simultaneously. ### Key Aspects of Mixed Potential Theory: 1. **Mixed Potential**: In a system with more than one electrochemical reaction, the overall potential is influenced by the contributions from all the involved reactions.
Nickel(III) oxide by Wikipedia Bot 0
Nickel(III) oxide, also known as nickel trioxide, is a chemical compound with the formula Ni₂O₃. It is an oxide of nickel in which nickel has an oxidation state of +3. This compound is characterized by its dark green to black appearance and is less common than the more stable Nickel(II) oxide (NiO). Nickel(III) oxide can be produced through various methods, including the oxidation of nickel compounds at high temperatures or through specific chemical reactions.
Cf. by Ciro Santilli 37 Updated +Created
An Ionic partition diagram, also known as an ionic partition coefficient diagram or a partitioning diagram, is a graphical representation used to illustrate how ions distribute themselves between two immiscible phases, often in the context of solvent extraction or chemical analysis. The diagram helps visualize how the different ionic species behave in varying conditions, particularly regarding their solubility and stability in different environments (such as aqueous and organic phases).
Raster graphics by Ciro Santilli 37 Updated +Created
Represents image pixel by pixel, rather than by mathematical primitives such as done in vector graphics:
Pixel by Ciro Santilli 37 Updated +Created

Pinned article: ourbigbook/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