A walking audit, also known as a walkability audit, is an assessment tool used to evaluate the pedestrian-friendliness of a particular area or neighborhood. It involves physically walking through a designated area and observing various factors that impact the experience of pedestrians. The goal of a walking audit is to identify both strengths and weaknesses in the environment for walkers, which can then inform urban planning, community development, and policy decisions.
Swedish plasma physicists refer to researchers and scientists in Sweden who specialize in the study of plasma physics, which is the branch of physics that deals with plasmas—ionized gases composed of charged particles, including ions and electrons. Plasma is often referred to as the fourth state of matter, alongside solid, liquid, and gas.
Bodil Jönsson is a Swedish physicist, author, and speaker, well-known for her work in the fields of time, aging, and the philosophy of time. She has gained recognition for her ability to communicate complex scientific concepts to a general audience and has written several influential books, including "Time is a Created Thing" (original title: "Tid är något vi gör") which explores the nature of time and its impact on our lives.
Torbjörn Sjöstrand is a Swedish individual known primarily for his work in mathematics and related fields. However, there may be limited publicly available information about him, as he is not a widely recognized figure in popular culture or general public discourse.
The divisor function, often denoted as \( d(n) \) or \( \sigma_k(n) \), is a function in number theory that counts or sums the divisors of a positive integer \( n \). 1. **Count of Divisors**: The most common version is \( d(n) \), which counts the total number of positive divisors of \( n \).
Per-Olov Löwdin was a prominent Swedish theoretical physicist and chemist, known for his contributions to quantum chemistry and molecular physics. Born on February 15, 1916, and passing on March 3, 2000, Löwdin is celebrated for his work in the development of mathematical methods to describe atomic and molecular interactions.
Jürg Peter Buser is a Swiss physicist known for his research in the field of physics, particularly in areas related to optics and photonics. However, there may be limited publicly available information about him.
A **glide plane** is a concept primarily used in the field of crystallography and materials science, particularly in the study of crystallographic defects such as dislocations. In simple terms, a glide plane is a specific plane within a crystal lattice along which dislocations can move. In the context of slip systems, glide planes play a crucial role in plastic deformation of materials.
Paul Gruner could refer to various individuals depending on the context, but without specific details, it's difficult to pinpoint exactly who you're referring to.
A Bent function is a specific type of Boolean function that has maximum possible distance from all affine functions, making it highly nonlinear. In the context of cryptography and coding theory, Bent functions are particularly valued for their strong security properties and resistance to linear approximations, which makes them suitable for use in cryptographic applications.
Centrosymmetry is a property of a geometric or physical system that indicates symmetry with respect to a central point. In a centrosymmetric structure, for every point in the structure, there is an identical point located at an equal distance in the opposite direction from a central origin.
Lie point symmetry is a concept from the field of differential equations and mathematical physics, named after the mathematician Sophus Lie. It specifically refers to symmetries of differential equations that can be expressed in terms of point transformations of the independent and dependent variables. In simpler terms, if a differential equation remains invariant under a transformation that is generated by a continuous group of transformations, then it possesses a Lie point symmetry.
Symmetry breaking is a concept found in various fields of science, particularly in physics, mathematics, and biology. At its core, it refers to a situation where a system that is originally symmetric undergoes a change that results in the loss of that symmetry. ### In Physics: 1. **Phase Transitions**: One of the most common examples of symmetry breaking occurs in phase transitions, such as when water freezes into ice.
Rotational symmetry is a property of a shape or object that indicates it can be rotated around a central point by a certain angle and still look the same as it did before the rotation. In other words, if you were to rotate the object about its central point, it would match its original configuration at certain intervals of rotation.
A symmetry group is a mathematical concept that describes the symmetries of an object or a system. In more formal terms, a symmetry group is a group composed of the set of all transformations that preserve certain properties of a geometric object, a physical system, or a solution to an equation. These transformations can include rotations, translations, reflections, and other operations.
Coreference is a linguistic phenomenon in which two or more expressions in a text refer to the same entity or individual. For example, in the sentences "Lisa went to the store. She bought some groceries," the pronoun "she" is a coreferential expression that refers back to "Lisa.
Attributional calculus, often referred to in the context of reasoning and inference systems, is a formal framework used to model and manipulate complex relationships between events, entities, or concepts. Although not a widely recognized term in standard mathematical literature, the concept can generally relate to reasoning about causation and the attribution of causes and effects within a logical framework.
Phi features, often referred to in the context of genetic modifications or advanced biotechnology, can represent a variety of concepts depending on the specific field of study or application. However, in a general sense, "Phi features" might not refer to a widely recognized or established concept as of my last training cut-off in October 2023.
Pseudogapping is a syntactic phenomenon in linguistic theory, particularly within the field of generative grammar. It involves a type of ellipsis where part of a verb phrase (often including a verb and certain complements or adjuncts) is omitted, while some parts remain overt. This results in a structure that gives the appearance of a gap but does not neatly fit into traditional ellipsis patterns like gapping or sluicing.

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