Hans Bethe by Ciro Santilli 37 Updated +Created
Head of the theoretical division at the Los Alamos Laboratory during the Manhattan Project.
Richard Feynman was working under him there, and was promoted to team lead by him because Richard impressed Hans.
He was also the person under which Freeman Dyson was originally under when he moved from the United Kingdom to the United States.
And Hans also impressed Feynman, both were problem solvers, and liked solving mental arithmetic and numerical analysis.
This relationship is what brought Feynman to Cornell University after World War II, Hans' institution, which is where Feynman did the main part of his Nobel prize winning work on quantum electrodynamics.
Hans must have been the perfect PhD advisor. He's always smiling, and he seemed so approachable. And he was incredibly capable, notably in his calculation skills, which were much more important in those pre-computer days.
An **adelic algebraic group** is a concept that arises in the context of algebraic groups and number theory, particularly in the study of rational points and arithmetic geometry. To explain it more precisely, we first need to understand what an algebraic group is and then what "adelic" means in this context. ### Algebraic Groups An **algebraic group** is a group that is also an algebraic variety.
An adiabatic invariant is a quantity that remains constant when changes are made to a system very slowly, or adiabatically, compared to the timescales of the system's dynamics. The concept is often discussed in the context of classical mechanics, quantum mechanics, and thermodynamics. ### In Classical Mechanics In classical mechanics, one of the most well-known adiabatic invariants is the action variable, which is defined in the context of a periodic motion.
The Fraňková–Helly selection theorem is a result in the field of functional analysis and topology, specifically concerning the selection of points from family of sets. It builds upon the classical Helly's theorem, which deals with finite intersections of convex sets in Euclidean spaces. The Fraňková–Helly selection theorem provides conditions under which one can extract a sequence from a family of sets that converges in a certain sense.
ADITYA (tokamak) by Wikipedia Bot 0
ADITYA is a tokamak, which is a device designed to confine plasma using magnetic fields in order to achieve controlled nuclear fusion. It is a part of India's efforts in fusion research and is primarily developed by the Institute for Plasma Research (IPR) in Gandhinagar, Gujarat.
The Erdős–Rado theorem is a result in combinatorial set theory that deals with families of sets and their intersections. It is named after mathematicians Paul Erdős and Richard Rado, who developed the theorem in the context of infinite combinatorics.
Adolfo del Campo by Wikipedia Bot 0
Adolfo del Campo can refer to a person or a specific concept depending on the context. However, as of my last update in October 2023, there is no widely recognized figure or term by that name in public discourse, literature, or notable events.
In astronomy, polar distance refers to the angular measurement of the distance from a celestial object to the celestial pole, typically expressed in degrees. The celestial pole is the point in the sky that corresponds to the Earth's North or South Pole. In a more specific sense, polar distance can be associated with the position of a star or other celestial object in the sky in relation to the celestial sphere.
Adolf Wüllner by Wikipedia Bot 0
Adolf Wüllner is a name associated with a historical figure, specifically a German composer, conductor, and music educator who was active primarily in the late 19th and early 20th centuries. He is known for his works in choral and orchestral music, contributing to the musical landscape of his time.
Grammar systems theory is an area of study that focuses on the formal representation and analysis of grammatical structures in languages. It highlights the relationships between different components of grammar, exploring how rules govern sentence formation, syntax, semantics, and morphology. The theory seeks to understand languages through the application of formal systems, often using models based on mathematical and computational principles.
Prediction by Wikipedia Bot 0
Prediction refers to the act of forecasting or estimating a future event or outcome based on current knowledge, data, patterns, or trends. It involves utilizing various methods and tools, ranging from statistical analysis and mathematical models to machine learning algorithms and expert judgment, to make informed guesses about what is likely to happen in the future. Predictions are commonly used in various fields, including: - **Weather forecasting**: Estimating weather conditions based on atmospheric data.
Aragats is a distributed computing project designed for a wide range of applications, including scientific research, big data processing, and more. It typically involves pooling resources from multiple computers to create a powerful computing environment that can handle complex tasks more efficiently than a single machine. One notable use of the name "Aragats" comes from the Armenian context, where it refers to Mount Aragats, the highest peak in Armenia.
Archaeological illustration is a specialized field of graphic representation that plays a crucial role in archaeology. It involves creating accurate and detailed visual representations of archaeological artifacts, sites, features, and stratigraphy. These illustrations serve various purposes, including documentation, analysis, and communication of archaeological findings. Key aspects of archaeological illustration include: 1. **Technical Drawing**: Illustrators produce precise drawings of artifacts (such as pottery, tools, and structures) to document their size, shape, and decoration.
Archibald Campbell, 1st Baron Blythswood (1852–1937), was a Scottish politician and businessman known for his contributions to the cotton industry in the 19th and early 20th centuries. He was a prominent figure in the textile and manufacturing sectors and was involved in various public and charitable activities. In 1911, he was elevated to the peerage as Baron Blythswood, a title that reflects his wealth and influence during that era.
The Arctic Research Office is a part of the U.S. government that focuses on coordinating and supporting Arctic research efforts. It is typically associated with the National Science Foundation (NSF) and works to enhance the understanding of the Arctic environment, ecosystems, and communities, as well as the impacts of climate change in the region. The office plays a critical role in fostering collaboration among researchers, stakeholders, and indigenous communities, and often facilitates the development of research initiatives that address pressing issues related to the Arctic.
Area by Wikipedia Bot 0
Area is a measure of the amount of space contained within a two-dimensional shape or surface. It is typically expressed in square units, such as square meters (m²), square centimeters (cm²), square feet (ft²), and so on. The area can be calculated for various geometric shapes using specific formulas. Here are some common formulas for calculating the area of different shapes: 1. **Rectangle**: Area = length × width (A = l × w) 2.
Arete by Wikipedia Bot 0
"Arete" is an Ancient Greek term that translates roughly to "excellence" or "virtue." In the context of Greek philosophy, particularly in the works of Plato and Aristotle, arete refers to the quality of excellence of character and intellect that allows individuals to fulfill their purpose and potential. It encompasses qualities such as bravery, wisdom, and justice, and is often associated with living a life of moral integrity and achieving one's highest capabilities.
Argon–argon dating (often abbreviated as Ar-Ar dating) is a radiometric dating method used to determine the age of rock and mineral samples, primarily within the context of geological and archaeological studies. It is particularly useful for dating volcanic rocks and ash layers. The technique is based on the decay of potassium-40 (K-40) to argon-40 (Ar-40). Potassium-40 is a radioactive isotope that decays over time into argon gas.
Argos is a satellite-based system designed for data collection and environmental monitoring. Launched in 1978, it was developed by the French space agency CNES (Centre National d'Études Spatiales) in collaboration with NASA and several other space agencies. The primary purpose of Argos is to gather real-time data from remote locations, which is particularly useful for wildlife tracking, oceanographic studies, climate monitoring, and disaster management.

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!
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