Bought 2021-11, grey, size EUR 44.5, 80$ (later found cheaper online): www.sportsdirect.com/nike-run-swift-2-running-shoes-mens-121052
Ciro Santilli's hardware 2017-04 Nike Flex Experience RN 6 Grey running shoes by 
Ciro Santilli 40 Updated 2025-07-16
Ciro Santilli 40 Updated 2025-07-16A report on the Navier-Stokes Problem by Vladimir Šverak
. Source. 2025.As mentioned on the Wikipedia page en.wikipedia.org/w/index.php?title=Stationary_Action_Principle&oldid=1020413171, "principle of least action" is not accurate since it could not necessarily be a minima, we could just be in a saddle-point.
OurBigBook Web error reporting starting to look amazing.
Source. Calculus of variations is the field that searches for maxima and minima of Functionals, rather than the more elementary case of functions from to .
If your pollution damages the property of others, that would violate the NAP, and a minarchy would be justified in collecting penalties for the same and distributing them to the people affected. This should incentivize the company to try and prevent or clean up its pollution as much as possible. We need to decide the extent of such penalties, and whether penalties other than monetary ones would be even more effective at preventing pollution.
Gas in the context of scattering media absorption spectroscopy refers to a state of matter in which particles, such as molecules or atoms, exist in a well-dispersed manner with relatively large spaces between them, allowing them to move freely. In spectroscopy, particularly absorption spectroscopy, gases can absorb specific wavelengths of light, leading to characteristic absorption spectra that can be used to identify and quantify the presence of certain substances.
Sorption is a physical and chemical process by which one substance becomes attached to another. It encompasses both adsorption and absorption: 1. **Adsorption**: This is the process where particles adhere to the surface of a solid or liquid. In this case, the molecules do not penetrate the bulk of the substance but instead form a layer on its surface. Common examples include the adherence of gas molecules to a solid surface, such as activated carbon adsorbing pollutants from air or water.
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!
Intro to OurBigBook
. Source. We have two killer features:
- 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-calculusArticles 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/derivativeVideo 2. OurBigBook Web topics demo. Source. - 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.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 3. Visual Studio Code extension installation.
Figure 4. Visual Studio Code extension tree navigation.
Figure 5. Web editor. 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.Video 4. OurBigBook Visual Studio Code extension editing and navigation demo. Source. 
- Infinitely deep tables of contents:
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