A radial trajectory refers to a path or motion that extends outward from a central point or source in a straight line. In various fields, these trajectories can describe different movements: 1. **Physics and Astrophysics**: In the context of gravitational systems, a radial trajectory might describe the path of an object moving away from or towards a central body, such as a planet or star. For example, a spacecraft following a radial trajectory would move directly away from or towards Earth.
Historical physics publications refer to documented works, studies, articles, and papers that focus on the development and progress of physics as a science throughout history. These publications might include: 1. **Original Research Papers**: These are articles authored by physicists that present new findings or theories, often published in scientific journals. Historical physics publications might also include landmark studies that have paved the way for modern physics.
Fritz Strassmann was a German physicist who is best known for his work in nuclear chemistry and for his role in the discovery of nuclear fission. He was born on February 22, 1902, and passed away on April 22, 1980.
In physics, symmetry refers to a property or characteristic of a system that remains invariant under certain transformations. This can involve spatial transformations, such as translations, rotations, and reflections, as well as other types such as time reversibility or particle interchange. Symmetry plays a critical role in understanding physical laws and phenomena, often leading to conservation laws and simplifying complex problems.
TODO: the interrupt is firing only once:
Adapted from: danielmangum.com/posts/risc-v-bytes-timer-interrupts/
Tested on Ubuntu 23.10:Then on shell 1:and on shell 2:GDB should break infinitel many times on
sudo apt install binutils-riscv64-unknown-elf qemu-system-misc gdb-multiarch
cd riscv
makeqemu-system-riscv64 -machine virt -cpu rv64 -smp 1 -s -S -nographic -bios none -kernel timer.elfgdb-multiarch timer.elf -nh -ex "target remote :1234" -ex 'display /i $pc' -ex 'break *mtrap' -ex 'display *0x2004000' -ex 'display *0x200BFF8'mtrap as interrupts happen.In
v4.2, look under arch/x86/:include/asm/pgtable*include/asm/page*mm/pgtable*mm/page*
There seems to be no structs defined to represent the pages, only macros:
include/asm/page_types.h is specially interesting. Excerpt:#define _PAGE_BIT_PRESENT 0 /* is present */
#define _PAGE_BIT_RW 1 /* writeable */
#define _PAGE_BIT_USER 2 /* userspace addressable */
#define _PAGE_BIT_PWT 3 /* page write through */This period is similar to the Quaternary, but it also includes tool usage by close relatives of humans which were not humans yet.
It ends together with the pleistocene.
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