The great icosicosidodecahedron is a type of Archimedean solid, which is a convex polyhedron with identical vertices and faces that are regular polygons. Specifically, it is one of the most complex of these solids, consisting of 62 faces: 20 regular triangular faces, 30 square faces, and 12 regular pentagonal faces. In terms of its geometry, the great icosicosidodecahedron has 120 edges and 60 vertices.
Magnetic propulsion devices utilize magnetic forces to generate motion without the need for traditional mechanical systems, such as motors or engines. These devices harness the principles of magnetism, often employing magnets and electromagnetic fields to create thrust or movement. ### Key Concepts: 1. **Magnetic Levitation**: Some magnetic propulsion systems, like maglev trains, utilize magnetic levitation to lift and propel vehicles along a track. Electromagnets generate lift and thrust, allowing for frictionless travel at high speeds.
A "critical hit" is a term commonly used in role-playing games (RPGs), video games, and tabletop games to describe a successful attack that deals significantly more damage than a normal hit. The concept typically applies to combat situations, where certain conditions or random factors determine whether an attack will be a critical hit.
The Dakeyne hydraulic disc engine is a concept for a type of engine that utilizes hydraulic power to generate mechanical energy. While specific details may vary, hydraulic engines typically operate using fluid under pressure to drive pistons or other mechanical systems that convert hydraulic energy into rotational or linear motion. The "disc" aspect of the Dakeyne engine likely refers to a design that incorporates disc-shaped components, which could optimize fluid dynamics or efficiency in the conversion process.
Flora Levin does not appear to be a widely recognized figure or concept within my training data up to October 2023. It's possible that Flora Levin may refer to a private individual, a less-known historical figure, or a fictional character not covered in mainstream sources.
The "Promise Problem" refers to a class of decision problems in computational complexity that involves promises — that is, certain guarantees about the input. Specifically, it's related to a decision problem where the input is guaranteed to satisfy one of several conditions (or "promises"), but not necessarily all. In more formal terms, a promise problem can be defined as a pair of languages \( L_1 \) and \( L_2 \).
Constantine Sandis is a philosopher known for his work in philosophy of mind, epistemology, and the philosophy of action. He is recognized for his contributions to discussions surrounding notions of belief, intention, and agency. Sandis has also written on topics such as the nature of human action and the interrelation of belief and intention in understanding human behavior. His work often explores the implications of these philosophical concepts in both historical and contemporary contexts.
Paul Boghossian is an American philosopher and professor known for his work in epistemology, philosophy of language, and the philosophy of mind. He is particularly recognized for his contributions to discussions regarding the nature of knowledge, the problem of skepticism, and issues surrounding meaning and interpretation. Boghossian has taught at several institutions, including New York University, where he has been a prominent figure in the philosophy department.
"The Bounds of Sense" is a philosophical work by Peter Strawson, published in 1966. The book is primarily an analysis of Immanuel Kant's "Critique of Pure Reason." In it, Strawson examines Kant's ideas about knowledge, experience, and the limits of human understanding, focusing on how Kant's views can be interpreted and assessed in contemporary philosophical discourse.
"Plato's beard" is a philosophical concept that emerges in discussions about the nature of definitions and categorization, particularly in the context of how we understand and classify things in the world. The phrase is often associated with the problems of vagueness and how language can sometimes fail to capture the essence of a concept. The term is not directly from Plato’s own works, but it arises from a modern philosophical dialogue concerning the paradoxes of definitions.
"De vetula" is a medieval Latin text attributed to the 12th-century scholar and poet Walter of Bibbesworth. The title translates to "On the Old Woman." The work is notable for its humorous and satirical depiction of various aspects of life and relationships, often through the lens of a comical narrative involving a discussion or argument involving an old woman. The text is sometimes recognized for its playful and witty portrayal of morality and societal norms during the Middle Ages.
A "random map" typically refers to a concept in mathematics, particularly in the context of probability theory or combinatorics, where a mapping (or function) is generated in a way that incorporates randomness, often with the objective of studying the properties of such mappings or their distributions. In different contexts, "random map" can refer to: 1. **Random Functions**: Random mappings where each element from a set is assigned to an element in another set based on some probabilistic rule.
Units of measurement are standardized quantities used to express physical properties or characteristics. They provide a way to quantify and compare different aspects of the world around us, such as length, mass, volume, temperature, and time. Units can be part of different measurement systems, the most common of which are the International System of Units (SI) and the Imperial system.
Innuendo refers to an indirect or subtle expression, often implying something derogatory or suggestive without stating it outright. Innuendos can be used in various contexts, such as humor, criticism, or gossip. The term is often associated with double meanings or hidden implications, where the speaker conveys a message that is understood by the audience but not explicitly stated.
David J. Thomson is a name that may refer to several individuals, depending on the context. One notable figure is David J. Thomson, a Canadian businessman known for his involvement with the Thomson Corporation, a major publishing and information services company. The Thomson family has been influential in media and publishing for decades. Additionally, there may be others in various fields such as academia, science, or the arts with the same name.
Deep Inspiration Breath-Hold (DIBH) is a technique primarily used in radiation therapy, especially in the treatment of cancers in the thoracic region, such as breast and lung cancer. The DIBH technique involves instructing patients to take a deep breath and hold it while the radiation is being delivered.
The detection limit, often referred to as the "limit of detection" (LOD), is the lowest concentration or amount of an analyte (substance being measured) that can be reliably detected but not necessarily quantified in a given sample using a specific analytical method. The detection limit is crucial in various fields such as chemistry, environmental science, pharmaceuticals, and food safety, as it determines the sensitivity of an analytical method.
The Deutschsprachige Anwendervereinigung TeX (damt) is a user association for TeX users in German-speaking countries. TeX is a typesetting system that is widely used for producing documents with complex formatting and is particularly popular in academia for typesetting mathematical and scientific papers. The association aims to promote the use of TeX and its related tools, provide support and resources for users, and facilitate communication among TeX users in the German-speaking community.

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