The number 311 can refer to several things depending on the context. Here are a few common references: 1. **Emergency Services**: In many cities across the United States and some other countries, 311 is a non-emergency hotline that residents can call to report issues such as noise complaints, street maintenance, and other municipal services. It serves as a way to provide a more efficient way to access city services without tying up the emergency 911 line.
After-rust is a term that is often used in the context of certain forms of art and design, particularly referring to a creative movement or aesthetic focus that deals with the themes of decay and the transformative qualities of materials. It's not a universally defined term, but similar concepts can be found in contemporary art and design.
Electrochemical energy conversion refers to the process of converting energy from one form to another using electrochemical reactions. This typically involves the conversion of chemical energy stored in fuels or batteries into electrical energy, or vice versa. The main systems involved in electrochemical energy conversion include: 1. **Fuel Cells**: These devices convert chemical energy directly into electrical energy through an electrochemical reaction, usually involving hydrogen and oxygen (or another oxidant).
Electrophoresis is a scientific journal dedicated to the field of electrophoresis and related techniques. It publishes original research articles, reviews, and technical notes that focus on advancements in the application of electrophoresis in various fields, including biochemistry, molecular biology, and analytical chemistry. The journal covers a range of topics, such as the development of new electrophoretic techniques, applications in protein and nucleic acid analysis, and innovations in instrumentation.
"Interface" typically refers to a scientific journal that focuses on interdisciplinary research within the fields of materials science, physics, and engineering, specifically emphasizing interfaces and their properties. The journal publishes research articles, reviews, and short communications that examine the behavior of materials at their boundaries or interfaces, which play critical roles in various physical phenomena and applications. The focus of the journal may include topics such as surface science, nanotechnology, coatings, and interactions between different materials.
Classical electromagnetism is a fundamental theory in physics that describes how electric charges interact with each other and with magnetic fields. It is based on the principles of classical physics, primarily articulated in the late 19th century through the formulation of Maxwell's equations, which unify electricity and magnetism into a single coherent framework. Here are some key components of classical electromagnetism: 1. **Electric Charge**: The basic property of matter that causes it to experience a force in an electric field.
A worm's-eye view is a perspective used in photography, art, and visual storytelling that depicts a scene from a low angle, as if the viewer were at the level of a worm looking up. This perspective can emphasize the height of objects, such as buildings or trees, creating a sense of grandeur or immensity. It often conveys feelings of vulnerability or insignificance, as the viewer sees the world from a position that is usually not encountered in everyday life.
The term "formula" can have different meanings depending on the context in which it is used: 1. **Mathematics and Science**: In mathematics and science, a formula is a concise way of expressing information symbolically. It consists of mathematical symbols and numbers that represent a relationship or rule.
Euclidean plane geometry is a branch of mathematics that studies the properties and relationships of points, lines, angles, surfaces, and shapes in a two-dimensional plane. It is named after the ancient Greek mathematician Euclid, who is often referred to as the "father of geometry" due to his influential work, "Elements," which systematically presented the principles and proofs of geometry.
The Parallel Postulate, also known as Euclid's Fifth Postulate, is a fundamental principle in Euclidean geometry. It states that given a line and a point not on that line, there is exactly one line through the point that is parallel to the given line.
An adiabatic process is a thermodynamic process in which no heat is exchanged between a system and its surroundings. This means that any change in the internal energy of the system occurs solely due to work done on or by the system, rather than heat transfer. Key characteristics of adiabatic processes include: 1. **No Heat Transfer:** As mentioned, there is no energy transfer as heat (\(Q = 0\)).
"From Zero to Infinity" can refer to various concepts, works, or products depending on the context. However, in general terms, it often denotes the journey of exponential growth, development, or the exploration of vast possibilities, such as in mathematics, philosophy, or personal development. 1. **Mathematics:** In a mathematical sense, it could refer to concepts related to limits, series, or functions that extend from zero (the beginning) to infinity (the concept of boundlessness).
H. Rodney Withers is a prominent figure in the field of radiation therapy and oncology. He is known for his contributions to the understanding of how radiation affects biological tissues, especially in the context of cancer treatment. Withers has conducted significant research on tumor radiobiology, radiation-induced damage, and the mechanisms of cellular response to radiation. His work has played an important role in improving treatment protocols and patient outcomes in radiation therapy.
The term "exponential formula" can refer to several different concepts, depending on the context. Here are a few interpretations: 1. **Exponential Growth/Decay Formula**: This formula is often used in mathematics and the sciences to model processes that grow or decay at a rate proportional to their current value.
The Hadamard–Rybczynski equations describe the motion of a fluid in a gravitational field, particularly in the context of fluid dynamics. These equations are important in studying the behavior of inviscid and incompressible fluids, especially when analyzing potential flow around bodies. The Hadamard–Rybczynski equations relate the velocity potential or stream function to the shape of the body and the flow conditions around it.
Ludvig Oppermann is not widely recognized in popular culture or history up to my knowledge cutoff in October 2023. It's possible that he could be an emerging figure in a specific field, such as arts, sciences, or sports, or perhaps related to a local context or a niche topic that hasn’t gained widespread attention.
Niels Erik Nørlund (1881-1961) was a notable Danish mathematician recognized for his contributions to the fields of analysis and mathematical logic. He is particularly known for his work on functional analysis and for the Nørlund sums, which are a type of sequence summation method. Nørlund also contributed to the development of other mathematical concepts and theories.
Samuel Klingenstierna was a Swedish botanist and naturalist, known for his contributions to the study of plants in the 18th century. He is particularly noted for his efforts in botany and for his work in classifying and documenting various plant species. Klingenstierna was also involved in the establishment of several botanical gardens and institutions that helped advance the field of botany in Sweden and beyond.
Willem van Zwet is a prominent Dutch mathematician known for his contributions to statistics and probability theory. He has worked extensively on topics such as limit theorems, statistical inference, and time series analysis. Van Zwet has also published various papers and co-authored books in the field of statistics.
An Evolutionarily Stable Set (ESS) is a concept from evolutionary game theory that describes a strategy or set of strategies that, if adopted by a population, cannot be invaded or displaced by any alternative strategy that is initially rare. The idea centers around the stability of certain behaviors or traits in a population and how they can endure against competing strategies over time.

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