The Radium Dial Company was a significant entity in the early 20th century, primarily known for its production of luminous paint that contained radium. Founded in the 1920s, the company employed young women, often referred to as "radium girls," to paint watch dials and other instruments with this luminescent material. The paint glowed in the dark due to the inclusion of radium, which was highly regarded at the time for its bright and long-lasting luminescence.
The Einstein Cross, also known as Q2237+030, is a fascinating astronomical phenomenon that exemplifies gravitational lensing. It consists of a distant quasar, which is a bright and active region around a supermassive black hole in a galaxy, and is positioned behind a foreground galaxy. The gravitational field of this foreground galaxy warps spacetime, causing the light from the quasar to be bent around it.
Intergalactic media can refer to various concepts depending on the context in which it is used. Generally, it implies the creation, distribution, or consumption of media content that may have themes or stories involving space, interstellar travel, or extraterrestrial life. This could encompass various forms of entertainment, including: 1. **Science Fiction Content**: Books, movies, TV shows, and games that explore space travel, alien civilizations, and intergalactic adventures.
The Energetic Materials Research and Testing Center (EMRTC) is a facility that focuses on research, development, testing, and evaluation of energetic materials, which include explosives, propellants, and pyrotechnics. EMRTC is often associated with specific institutions or organizations, such as universities or governmental bodies involved in defense or public safety.
"Marotte" can refer to a couple of different things, depending on the context: 1. **In Puppetry**: A marotte is a type of puppet or a decorative staff, often held by a performer. It typically features a puppet head atop a stick and is used in various theatrical performances, especially in traditional comedy and vaudeville.
Enterprise Dynamics is a software platform primarily used for modeling, simulating, and analyzing complex systems and processes within various industries, such as manufacturing, logistics, healthcare, and service operations. It enables organizations to visualize their operations, identify bottlenecks, optimize resource allocation, and improve overall efficiency. The key features of Enterprise Dynamics typically include: 1. **Modeling**: Users can create detailed models of their systems using graphical interfaces, incorporating various elements such as resources, processes, and workflows.
"Del" can refer to different things depending on the context. Here are a few possibilities: 1. **Key on Keyboard**: The "Del" key, short for "Delete," is a key on computer keyboards. It is used to delete text or objects in various software applications. 2. **Mathematics**: In mathematics, particularly in vector calculus, "Del" (often represented as the symbol ∇) refers to the vector differential operator.
A hexagonal number is a figurate number that represents a hexagon. The \(n\)th hexagonal number can be calculated using the formula: \[ H_n = n(2n - 1) \] where \(n\) is a positive integer. Hexagonal numbers can be visualized as a pattern of points arranged in the shape of a hexagon.
Aiken code is a simple format used to create multiple-choice questions for use in educational software and learning management systems (LMS). It allows educators to write questions in a plain text format that can be easily imported into various systems. ### Aiken Code Format The Aiken format typically follows this structure: 1. **Question text**: The question itself is written on a single line.
Evolution in a variable environment refers to the concept that the conditions and challenges faced by organisms can change over time, influencing the process of natural selection and evolutionary adaptations. In such environments, organisms must be able to adapt not only to the current conditions but also to potential future changes in their habitat. Key aspects of evolution in a variable environment include: 1. **Phenotypic Plasticity**: This is the ability of an organism to alter its physical or behavioral traits in response to changes in the environment.
In Riemannian geometry, the exponential map is a crucial concept that connects the local geometric properties of a Riemannian manifold to its global structure. Specifically, it describes how to move along geodesics (the generalization of straight lines to curved spaces) starting from a given point on the manifold.
Gödel's incompleteness theorems, formulated by the mathematician Kurt Gödel in the early 20th century, are two fundamental results in mathematical logic and philosophy of mathematics. They reveal inherent limitations in the ability of formal systems to prove all truths about arithmetic.
Ground and neutral are two important concepts in electrical systems, especially in wiring and circuitry: 1. **Ground**: - Ground is a safety feature in electrical systems. It serves as a reference point for electrical circuits and provides a pathway for electrical current to return to the earth in case of a fault, preventing shock or fire hazards. - In many systems, the ground wire is connected to the earth, and it is usually a bare wire or has green insulation.
Gustaf de Laval was a Swedish engineer and inventor, best known for his contributions to the dairy industry and the development of centrifugal separation technology. He was born on April 9, 1845, and he made significant advancements in the design of cream separators, which allowed for the efficient separation of cream from milk. One of his notable inventions is the centrifugal separator, a device that uses centrifugal force to separate substances of different densities.
An empty string is a string data type that contains no characters. In programming and computer science, it is often represented by a pair of double quotes with nothing in between (`""`) or single quotes (`''`). The length of an empty string is zero, meaning it has no content. Empty strings are commonly used in various contexts, such as: 1. **Initialization**: Setting a variable to an empty string to indicate that it is not yet assigned any meaningful value.
Distance sampling is a statistical method used in ecology and wildlife management to estimate the density and abundance of animal populations. It involves surveying an area to detect animals while considering their distance from a line or point of observation. By recording the distance of observed animals from a predetermined line or point, researchers can use this information to make inferences about the population as a whole.
Half-Life: Blue Shift is a standalone expansion for the classic first-person shooter game Half-Life, developed by Gearbox Software and published by Sierra Studios. Released in 2001, Blue Shift follows the story of Barney Calhoun, a security guard at the Black Mesa Research Facility, who must navigate the chaos following the resonance cascade that occurs in the original Half-Life.
As of my last knowledge update in October 2023, there doesn't appear to be widely recognized information or context surrounding the term "Hassan Jawahery." It's possible that it could refer to a person's name or a specific entity, but without more context, it's hard to provide a detailed response.

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