Charles Darwin was a British naturalist, geologist, and biologist best known for his contributions to the understanding of evolution. Born on February 12, 1809, he is most famous for developing the theory of natural selection, which explains how species evolve over time through the process of heritable variation and survival of the fittest.
A joule (symbol: J) is the unit of energy in the International System of Units (SI). It is defined as the amount of energy transferred when one newton of force is applied over a distance of one meter.
"Therm" can refer to different things depending on the context: 1. **Therm as a Unit of Heat:** A therm is a non-SI unit of heat energy. It is commonly used in the context of natural gas and is equal to 100,000 British thermal units (BTUs), which is approximately 29.3 megawatt-hours (MWh) or 105.5 megajoules.
A **ringed topos** is a concept from the field of topos theory, which is a branch of category theory that generalizes set theory and provides a framework for discussing various mathematical structures. In topos theory, a "topos" (plural: "topoi") is a category that behaves like the category of sets and has certain properties that make it suitable for doing mathematics in a categorical context.
Joan Roughgarden is an American evolutionary biologist, ecologist, and sexual selection theorist known for her contributions to understanding the evolution of sex and sexual behavior. She is noted for her critiques of traditional models of sexual selection, particularly those proposed by Charles Darwin, and for developing alternative theories that emphasize the roles of cooperation and social dynamics in the evolution of behavior.
Ludwig von Bertalanffy (1901–1972) was an Austrian biologist and systems theorist best known for developing General Systems Theory (GST). He sought to understand the principles that govern complex systems across various fields, including biology, psychology, sociology, and engineering. Bertalanffy's work emphasized the importance of looking at systems as wholes rather than merely the sum of their parts.
Nina Fefferman is an American mathematician and biologist known for her research in the fields of mathematical biology, epidemiology, and mathematical modeling. She has contributed to understanding the dynamics of infectious diseases and complex systems. Fefferman has been involved in interdisciplinary studies that bridge mathematics and biology, often focusing on how mathematical frameworks can help in predicting disease spread and understanding ecological systems. Additionally, she has been active in promoting science communication and education.
René Thom (1923–2002) was a French mathematician best known for his contributions to topology and the development of catastrophe theory. Born in Montfavet, France, he made significant advancements in understanding mathematical phenomena that can exhibit sudden changes in behavior, which are modeled using "catastrophes." Catastrophe theory is a branch of mathematics that studies how small changes in the parameters of a system can lead to abrupt changes in its behavior or structure.
The Metabolic Theory of Ecology (MTE) is a theoretical framework that seeks to explain various ecological patterns and processes through the lens of metabolic processes in living organisms. It posits that metabolic rate, which is fundamentally connected to body size and temperature, influences ecological dynamics and patterns across different levels of biological organization, from individuals to populations and communities.
The Vasicek model is a popular mathematical model used in finance and economics to describe the dynamics of interest rates, as well as asset prices. Developed by Oldrich Vasicek in 1977, the model is particularly noted for its ability to capture the mean-reverting behavior of interest rates, which is a common characteristic observed in real-world financial markets. ### Key Features of the Vasicek Model 1.
The Ornstein-Uhlenbeck operator is an important mathematical operator in the context of stochastic processes, particularly in the study of the Ornstein-Uhlenbeck (OU) process, which is a well-known Gaussian process used to model mean-reverting behavior. ### Origin The Ornstein-Uhlenbeck process is named after George Uhlenbeck and Leonard Ornstein, who introduced it in the context of statistical mechanics to describe the velocity of a particle undergoing Brownian motion under the influence of friction.
Palm calculus is a mathematical framework used primarily in the fields of stochastic processes and queueing theory, particularly for analyzing systems involving random points in time or space, such as arrival processes. It is named after the Swedish mathematician Gunnar Palm, who contributed to the development of this theory.
Unified Modeling Language (UML) is a standardized modeling language used in software engineering to visualize, specify, construct, and document the artifacts of a software system. The applications of UML are broad and can be categorized into several areas: 1. **Software Design and Architecture**: - **Object-Oriented Design**: UML helps in designing software systems using object-oriented principles. Class diagrams, component diagrams, and package diagrams are used to represent the structure of a system.
David Harel is a prominent computer scientist known for his contributions to several areas in computer science, particularly in theoretical computer science, software engineering, and the design of programming languages. He is best known for his work on state machines, model checking, and formal methods. One of Harel's key contributions is the development of the Harel State Chart technique, which extends Finite State Machines and is widely used for modeling complex systems.
An inner class in Java is a class that is defined within the body of another class. It has access to the members (fields and methods) of the outer class, even if they are declared private. Inner classes can be used to logically group classes that are only used in one place, increasing the encapsulation and readability of the code. There are four types of inner classes in Java: 1. **Non-static Inner Class**: These are tied to an instance of the outer class.
PlantUML is an open-source tool used to create diagrams from plain text descriptions. It enables users to generate a variety of UML (Unified Modeling Language) diagrams, including class diagrams, sequence diagrams, use case diagrams, activity diagrams, component diagrams, state diagrams, and more. PlantUML's syntax is designed to be simple and intuitive, allowing users to write textual representations of diagrams that can then be rendered into graphical formats, such as PNG, SVG, or PDF.
A use case diagram is a visual representation of the interactions between users (or "actors") and a system to achieve specific goals. It is commonly used in software engineering and system design to help stakeholders understand the functional requirements of a system. Use case diagrams are part of the Unified Modeling Language (UML), which is a standardized modeling language in software engineering.
The Majorana equation is a relativistic wave equation that describes particles known as Majorana fermions. These particles are unique in that they are their own antiparticles, meaning that they possess the same quantum numbers as their antiparticles, unlike traditional fermions (like electrons), which have distinct antiparticles (such as positrons).
C-symmetry, also known as charge conjugation symmetry, refers to a fundamental symmetry in particle physics concerning the transformation of particles into their corresponding antiparticles. Specifically, it involves changing a particle into its antiparticle, which has the opposite electric charge and other quantum numbers. In terms of mathematical representation, charge conjugation transforms a particle state \(| \psi \rangle\) into its charge-conjugated state \(| \psi^C \rangle\).
Goes along: if you could control your life multiple times to be perfect, you would eventually get tired of paradise, and you would go further and further into creating uncertain worlds with some suffering, until you would reach the current real world.
Very similar to The Matrix (1999) when Agent Smith talks about the failed Paradise Matrix shown at www.youtube.com/watch?v=9Qs3GlNZMhY:
Did you know that the first Matrix was designed to be a perfect human world where none suffered, where everyone would be happy? It was a disaster. No one would accept the program. Entire crops were lost. Some believed that we lacked the programming language to describe your "perfect world". But I believe that, as a species, human beings define their reality through misery and suffering. So the perfect world was a dream that your primitive cerebrum kept trying to wake up from.
Video 1.
Alan Watts' "The dream of life" talk
. Source.

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 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    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.
  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