The U.S. and World Population Clock refers to tools and resources that provide real-time estimates of the current populations of the United States and the entire world. These clocks utilize statistical models and data from sources such as the U.S. Census Bureau, the United Nations, and other demographic research organizations to give live updates on population numbers. ### U.S. Population Clock - **Source**: Often maintained by the U.S. Census Bureau.
The "Tarmac scam" typically refers to a type of fraud that involves scammers posing as legitimate paving or driveway contractors. They often target homeowners, particularly the elderly, by falsely claiming that they have leftover materials from a previous job and can offer a discounted rate to pave or repair driveways.
Home appliances are electrical or mechanical devices designed to perform specific household tasks, making daily chores more efficient and convenient. They can be categorized into a few main types: 1. **Major Appliances (or White Goods)**: These are large appliances typically used in the kitchen and laundry room. Examples include: - Refrigerators - Ovens and stoves - Dishwashers - Washing machines and dryers 2.
A mechanical network refers to a system of interconnected mechanical components that work together to perform a specific function or process. These networks can be composed of various elements, such as gears, linkages, levers, springs, and other mechanical parts that transmit forces and motions. Here are some key characteristics and concepts associated with mechanical networks: 1. **Connectivity**: Mechanical networks consist of various components connected at specific points (nodes), allowing the transfer of forces or movements from one part of the system to another.
"Transport and the environment" refers to the relationship between transportation systems and the natural environment. It encompasses the environmental impacts of various modes of transportation, including road, rail, air, and maritime transport. Key aspects of this relationship are: 1. **Air Pollution**: Transportation contributes significantly to air quality issues, emitting pollutants like nitrogen oxides (NOx), particulate matter (PM), carbon monoxide (CO), and volatile organic compounds (VOCs).
Transport education refers to the study and training related to various aspects of transportation systems, including the planning, design, operation, and management of transportation networks and modes. This field encompasses a wide range of topics, including but not limited to: 1. **Traffic Engineering**: Understanding and managing the flow of traffic, including the design of roadways and intersections to enhance safety and efficiency.
Transport systems refer to the networks and infrastructures that facilitate the movement of people, goods, and services from one location to another. These systems encompass a variety of modes of transportation, including: 1. **Road Transport**: This involves vehicles such as cars, trucks, buses, and motorcycles that travel on roads and highways. 2. **Rail Transport**: Trains that run on tracks for the purpose of transporting passengers and freight.
Southport Model Railway Village is a popular tourist attraction located in Southport, Merseyside, England. It features an extensive and intricately detailed miniature railway and village display, where visitors can enjoy a miniature representation of a working railway set in a scenic landscape. The village includes various models of buildings, vehicles, and figures, all meticulously crafted to create a vibrant and engaging environment.
AC 91-57 is an Advisory Circular (AC) published by the Federal Aviation Administration (FAA) in the United States. It provides guidance on the use of model aircraft and unmanned aircraft systems (UAS), outlining practices for safe operation. The guidance includes recommendations for the operation of these aircraft in compliance with existing regulations and emphasizes the importance of keeping these activities safe for both the operators and the public.
Model aviation is a hobby and sport that involves the construction, piloting, and enjoyment of model aircraft. These aircraft can range from small, hand-launched planes to large radio-controlled (RC) models that are capable of performing complex maneuvers. Model aviation encompasses a variety of disciplines, including: 1. **Control Line Flying**: Involves aircraft that are controlled by a pilot using wires connected to the plane while it flies in a circular pattern.
Gescha Toys is a brand known for manufacturing and selling high-quality toy vehicles, figures, and playsets, typically designed for children. The brand often emphasizes creative play and educational value, producing items that encourage imaginative scenarios and interactive play. Their products may include construction vehicles, farm toys, and various themed sets that appeal to young children.
BoPET stands for Biaxially Oriented Polyethylene Terephthalate. It is a type of polyester film that is produced by stretching polyethylene terephthalate (PET) in both the machine direction (MD) and the transverse direction (TD). This biaxial orientation enhances the film's strength, durability, and clarity, making BoPET a popular choice for various applications.
Application-layer framing refers to the method of encapsulating data for transmission over a network at the application layer of the OSI (Open Systems Interconnection) model. In simple terms, it involves the organization and structuring of data packets/output in such a way that both transmitting and receiving applications can understand and process the data correctly. Here are some key points to understand about application-layer framing: 1. **Data Structure**: Application-layer framing provides a way to structure data into meaningful units.
Prefix grammar is a type of formal grammar that defines strings where the prefix of any valid string can also be considered as a valid string. This concept is particularly important in the study of formal languages, syntax, and automata theory. In more intuitive terms, if a grammar generates a string, then all substrings that can be derived from the beginning of that string (i.e., its prefixes) are also included in the language defined by that grammar.
Arturo Reghini (1883-1971) was an Italian philosopher, esoterist, and writer known for his contributions to the field of esoteric studies and his exploration of the intersection between philosophy and mysticism. He was associated with various spiritual and philosophical movements and was influential in the study of traditional spiritual paths, particularly in Western esotericism.
Ashtekar variables are a reformulation of General Relativity used primarily in the context of canonical gravity and loop quantum gravity. Introduced by the physicist Abhay Ashtekar in the mid-1980s, these variables provide a new framework for understanding the geometry of spacetime and the nature of gravitational fields. In General Relativity, the dynamics of the gravitational field are typically described using the metric tensor, which can be complex and challenging to handle mathematically.
Askar Dzhumadildayev is a notable figure from Kazakhstan, primarily recognized for his work in the fields of science and technology, particularly in relation to the development of satellite technology and telecommunications in Kazakhstan. He has played a significant role in advancing the country's capabilities in these areas.
The Auger effect is a physical phenomenon observed in atomic and solid-state physics, where an atom or molecule releases energy in the form of Auger electrons. This effect occurs following the ionization of an atom, typically after the ejection of an inner-shell electron due to high-energy processes such as X-ray absorption or electron bombardment.
Atomenergomash is a Russian company that specializes in the design and manufacturing of equipment for the nuclear and thermal power industries. It is part of the state-owned corporation Rosatom, which is responsible for the country's nuclear energy sector. Atomenergomash produces a variety of components, including reactors, turbines, and heat exchangers, and provides services related to the construction and operation of power plants.

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