An ultraconnected space is a concept in topology—a branch of mathematics that studies the properties of space that are preserved under continuous transformations. A topological space \( X \) is called **ultraconnected** if it is non-empty and any two open sets in \( X \) intersect non-trivially, meaning that the intersection of any two non-empty open sets is not empty.
Harry Grindell Matthews (1886–1965) was a British inventor and entrepreneur known for his work in the field of early radio technology. He gained notoriety for developing various inventions related to radio communications and wireless technology during the early 20th century. Matthews is particularly remembered for his attempts to create devices that could transmit and receive wireless signals over long distances, including efforts to develop a wireless telephone.
Jim Carter is not widely recognized as a pseudoscientist in mainstream discussions of science or pseudoscience. If you are referring to a specific individual or topic related to his work that gained attention after my last update in October 2023, I may not have that information. However, the term "pseudoscientist" typically refers to individuals who promote ideas or methodologies that claim to be scientific but lack the rigorous standards of evidence, methodology, or peer review that characterize legitimate science.
Alfred Lawson was an American aviation pioneer, businessman, and inventor active in the early 20th century. He is perhaps best known for developing the Lawson Airliner, which he promoted as a revolutionary aircraft design. Lawson also founded the Lawson Aviation Corporation and was involved in various ventures throughout his career, including efforts to advance the field of aviation and promote air travel. In addition to his work in aviation, Lawson was also known for his eccentric ideas and beliefs, which sometimes garnered criticism.
As of my last knowledge update in October 2023, I don't have any specific information on "Arthur Patschke." It’s possible that he is not a widely known public figure or his relevance may be limited to specific fields or locales.
The Euler function, often denoted as \(\phi(n)\), is also known as Euler's totient function. It counts the number of positive integers up to \(n\) that are coprime to \(n\). Two integers \(a\) and \(b\) are said to be coprime (or relatively prime) if their greatest common divisor (gcd) is 1. The function has both theoretical and practical applications in number theory and cryptography.
F. H. Jackson could refer to different things, depending on the context. One of the more notable mentions could be Frederick Hamilton Jackson, a British geographer and historian, known for his work in the early 20th century. He is recognized for his contributions to the study of geography in relation to human society. If you had a different F. H.
Corentin Louis Kervran (1901–1993) was a French biologist and researcher known for his unconventional ideas in the field of biology, particularly regarding the concept of biological transmutation. Kervran proposed that living organisms could transform one element into another through biological processes, challenging traditional views of chemistry and biology that adhere to the laws of conservation of mass. His theories garnered interest and some controversy, as they suggested that transmutation could occur within the context of biological systems.
George Woodward Warder was a significant figure in American history, primarily known for his contributions to the fields of botany and horticulture. He was born on January 29, 1815, and passed away on February 27, 1884. Warder is particularly noted for his work in plant taxonomy and for being a prolific author on topics related to trees and their cultivation.
The "Gunslinger effect" typically refers to a phenomenon observed in competitive environments, particularly in fields like sports or gaming, where individuals or teams make aggressive decisions or take high-risk actions in response to pressure or to compensate for perceived shortcomings. This term can also appear in contexts like trading or investments, where participants might overreach or take bold risks after a series of losses or failures.
Korte's third law of apparent motion, also known as Korte's law or the Korte effect, relates to the perception of motion in visual stimuli, particularly in the field of psychology and visual perception. The law suggests that when two stationary objects are presented in close temporal succession, the observer perceives the first object as having moved toward the second object. This phenomenon occurs due to the brain's interpretation of the timing and position of the objects, leading to a misperception of motion.
Richard C. Hoagland is an American author, speaker, and former museum curator who is best known for his controversial theories about space and extraterrestrial life. He gained prominence in the 1980s for his ideas related to the structures and anomalies observed on the Moon and Mars, which he often claims are evidence of ancient alien civilizations. Hoagland has authored several books and appeared on various television programs and radio shows, discussing his theories and research.
Stefan Marinov was a Bulgarian-born physicist and entrepreneur known for his work in the fields of gravitational physics and alternative energy. Born in 1933, he emigrated to the United States where he became involved in various scientific endeavors. Marinov is perhaps best known for his controversial claims regarding the nature of gravity and his experiments aimed at demonstrating the effects of gravitational waves.
Tom Van Flandern was an American astronomer known for his work in the field of astrophysics and for his unconventional theories regarding celestial mechanics. He gained some notoriety for his ideas about dark matter and the structure of the universe, particularly in relation to the planets and moons in our solar system. Van Flandern is perhaps best known for proposing the "exploded planet hypothesis," which suggested that certain celestial bodies may have originated from the explosion of larger planets.
Photometry is the science of measuring visible light, in terms of its perceived brightness to the human eye. It involves the measurement of light intensity, luminous flux, illuminance, and luminance, among other properties. Photometry is crucial in various fields, including lighting design, photography, astronomy, and visual ergonomics.
Psychoacoustics is the study of the psychological and physiological responses associated with sound. It explores how humans perceive, interpret, and react to various aspects of sound, including pitch, loudness, timbre, and spatial location. This interdisciplinary field combines principles from psychology, acoustics, and neuroscience to understand the relationship between sound waves and human perception.
The absolute threshold refers to the minimum level of stimulus intensity that is necessary for a person to detect a stimulus 50% of the time. In other words, it is the lowest amount of physical energy that can be detected by the sensory organs. The concept is often used in psychology and sensory perception studies to measure the sensitivity of individual senses, such as hearing, vision, taste, touch, and smell.
Adaptive Comparative Judgment (ACJ) is an assessment method primarily used in education to evaluate and compare student work or performance. It leverages the expertise of judges (such as teachers or industry professionals) who assess multiple pieces of work in relation to one another rather than against a fixed standard or rubric.
The Coulomb operator is a mathematical operator that describes the interaction between charged particles due to electrostatic forces. In the context of quantum mechanics and quantum chemistry, it is most commonly used to represent the potential energy arising from the Coulomb attraction or repulsion between charged particles, such as electrons and nuclei.
DFTB stands for Density Functional Tight Binding. It is a computational method used in quantum chemistry and solid-state physics to study the electronic structure of materials. DFTB is an approximate method that simplifies the calculations associated with Density Functional Theory (DFT) by combining aspects of tight-binding models with density functional approximations.
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!
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 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.Figure 3. Visual Studio Code extension installation.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. - 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