Przybylski's Star, also known as HD 101065, is a peculiar and intriguing star located in the constellation Centaurus. It has garnered attention because it exhibits unusual elemental abundances, notably high levels of certain rare elements, including technetium and zirconium. This has led astronomers to study it more closely, as these elements are typically considered products of nuclear processes in stars, suggesting that Przybylski's Star may have a complex evolutionary history.
The Abundance Conjecture is a concept within the field of number theory, focusing on the behavior of certain algebraic integers. Specifically, it deals with the distribution of prime numbers and the density of subsets of integers with specific properties. While the conjecture has been discussed in various contexts, it is often associated with the idea that among the integers, there exists a rich abundance of those that exhibit certain arithmetic properties, such as being prime or having a specific number of divisors.
They are pioneers in making superconducting magnets, physicist from the university taking obsolete equipment from the uni to his garage and making a startup kind of situation. This was particularly notable for this time and place.
They became a major supplier for magnetic resonance imaging applications.
Used to explain the black-body radiation experiment.
Published as: On the Theory of the Energy Distribution Law of the Normal Spectrum by Max Planck (1900).
The Quantum Story by Jim Baggott (2011) page 9 mentions that Planck apparently immediately recognized that Planck constant was a new fundamental physical constant, and could have potential applications in the definition of the system of units (TODO where was that published):This was a visionary insight, and was finally realized in the 2019 redefinition of the SI base units.
Planck wrote that the constants offered: 'the possibility of establishing units of length, mass, time and temperature which are independent of specific bodies or materials and which necessarily maintain their meaning for all time and for all civilizations, even those which are extraterrestrial and nonhuman, constants which therefore can be called "fundamental physical units of measurement".'
TODO how can it be derived from theoretical principles alone? There is one derivation at; en.wikipedia.org/wiki/Planck%27s_law#Derivation but it does not seem to mention the Schrödinger equation at all.
Principles of the Optical Maser by Bell Labs
. Source. Date: 1963.- When condensed matter physics became king by Joseph D. Martin (2019): physicstoday.scitation.org/doi/10.1063/PT.3.4110
- www.youtube.com/watch?v=RImqF8z91fU&list=PLtTPtV8SRcxi91n9Mni2xcQX4KhjX91xp Solid State Physics" course by Sergey Frolov taught at the University of Pittsburgh in the Fall 2015 semester
Theories of Quantum Matter by Austen Lamacraft Quantum Hall Effect by
Ciro Santilli 40 Updated 2025-07-16
Anime and manga exploring the concept of parallel universes often delve into themes of alternate realities, alternate versions of characters, and the consequences of choices made in different dimensions. Here are some notable series that incorporate parallel universes: 1. **Steins;Gate**: This science fiction anime revolves around time travel and the concept of multiple timelines. The story follows a group of friends who discover a way to send messages to the past, leading to various branching timelines and alternate realities.
Michael Moorcock's Multiverse is a vast and complex fictional framework that serves as the setting for many of his works, particularly his fantasy and science fiction novels. It encompasses a multitude of parallel universes and dimensions that often intersect and interact with one another. The Multiverse is characterized by its diverse worlds, each with its own unique cultures, histories, and magical or technological systems.
Multiple time paths in fiction often refer to the narrative structure where a story explores multiple timelines or alternate realities. This technique allows authors to delve into different scenarios, character developments, or the consequences of choices made at various points in time. Here are some ways in which multiple time paths can be employed in storytelling: 1. **Parallel Universes**: Some stories feature characters who experience different versions of reality, often resulting from a pivotal choice or event.
Video games exploring themes of parallel universes often delve into alternate realities, multiple dimensions, and the implications of choices made by characters. Here are a few notable games that incorporate the concept of parallel universes: 1. **Bioshock Infinite**: This first-person shooter involves themes of alternate realities and the multiverse. Players explore a floating city and encounter different versions of characters based on choices made throughout the game.
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





