Cuddly Dudley is a fictional character from the children's television series "Postman Pat." He is a stuffed toy character, depicted as a cuddly, soft, and friendly creature, who is often seen in the company of children in the series. The show focuses on Pat, a postman, as he delivers mail in the fictional village of Greendale, encountering various adventures and helping the townspeople along the way.
"Hun Lakhon Lek" is a phrase in Hindi and Punjabi that translates to "I am a hundred thousand letters." It is also the title of a song by the Indian singer Guri, released in 2019. The song blends contemporary beats with traditional themes and has gained popularity in India and among Punjabi music fans.
A jig doll, also known as a "jig doll" or "jigging doll," is a type of traditional folk toy that typically takes the form of a wooden figure that is designed to move or "jig" in response to being manipulated, usually through a pulling or pushing motion. These dolls are often designed to be visually appealing and may be decorated with paint or carvings.
Kishkashta is a term that can refer to different things depending on the context. In some contexts, particularly in Middle Eastern or Central Asian cuisines, it refers to a type of dish that often involves stuffed intestines, similar to how sausages are made. In other contexts, particularly in relation to beverage brands or products, "Kishkashta" may refer to a specific brand or product line.
"Scally the Dog" is likely a reference to a character from the popular children's TV show "Bluey." In the series, Scally is a cute, playful dog who interacts with Bluey and other characters in various adventures and scenarios. The show focuses on the importance of imaginative play and family relationships, and Scally often participates in the whimsical activities that Bluey and her family engage in.
"Si Gale Gale" is a popular folk song from the Philippines, particularly associated with the Ilocano culture. The song is known for its catchy melody and lively rhythm, often performed during celebrations, gatherings, and festivals. The lyrics typically express themes of love, longing, and the beauty of everyday life, often reflecting the experiences and sentiments of the community.
"Wayang Kampung Sebelah" is a popular Indonesian comic strip created by the cartoonist Arie Kuntari. The term "Wayang" refers to traditional Indonesian puppetry, while "Kampung Sebelah" translates to "the village next door." The comic often humorously reflects daily life, social issues, and cultural nuances in Indonesia, especially from the perspective of village life.
Ziltoid the Omniscient is a fictional character created by Canadian musician Devin Townsend. He is the central figure in Townsend's 2007 concept album "Ziltoid the Omniscient." The character of Ziltoid is portrayed as an alien who comes to Earth seeking the perfect cup of coffee, as well as exploring themes of existentialism, humor, and the absurdity of life.
The Discus Launch Glider (DLG) is a type of model sailplane, specifically designed for hand launching and soaring. These gliders are typically lightweight and incorporate advanced aerodynamic designs and materials, allowing them to achieve impressive performance in flight. Key features of DLGs include: 1. **Hand Launching**: DLGs are designed to be launched by hand, making them ideal for flying in smaller spaces such as parks or fields.
A "spy video car" typically refers to a vehicle equipped with cameras and other surveillance technology designed to capture video footage for various purposes. These cars can be used in different contexts, such as: 1. **Law Enforcement**: Some police departments use vehicles outfitted with cameras to monitor traffic, conduct surveillance on criminal activity, or gather evidence in investigations.
The Draper Point is a term used in the field of planetary science that refers to a specific temperature threshold, typically around 100°C (212°F), which is the maximum surface temperature at which liquid water can exist on a planetary body at certain pressure conditions. This concept is often discussed in the context of habitability and the search for extraterrestrial life, as it pertains to the stability of liquid water, a critical ingredient for life as we know it.
ZipZaps refers to a brand of miniature remote-controlled cars that were popular in the early 2000s. These small, palm-sized vehicles were notable for their detailed design and performance capabilities, including being able to move in various directions, perform tricks, and navigate around obstacles. Many ZipZaps models were customizable, allowing users to change parts or add accessories to enhance their vehicles.
The New York Society of Model Engineers (NYSME) is a club dedicated to the hobby of model railroading and model engineering. Established in 1935, it is one of the oldest organizations of its kind in the United States. The society provides a platform for enthusiasts to share their passion, exchange ideas, and collaborate on projects related to model trains and railroads. Members of NYSME build and operate various model train layouts, often featuring intricate designs and realistic scenery.
"Garden Railways" generally refers to a type of model railroading that takes place in outdoor garden settings. It involves the construction of miniature train layouts that are set among plants, flowers, and outdoor landscapes. Garden railroads typically use larger scale models, such as G scale (1:22.5), which allows for more detailed and visually appealing setups that can be integrated into a natural environment.
A **synchronous condenser** is a type of synchronous machine that operates primarily for power factor correction in electrical power systems. It functions similarly to a synchronous generator but is designed to act primarily as a reactive power compensation device rather than for energy generation. Here are some key points about synchronous condensers: 1. **Reactive Power Control**: Synchronous condensers can provide or absorb reactive power (VARs), helping to manage voltage levels in the grid and improve the overall power factor.
Albedo is a measure of the reflective quality of a surface, defined as the fraction or percentage of incident light or radiation that is reflected off a surface without being absorbed. It is commonly used in various fields such as astronomy, climatology, and environmental science to describe how much sunlight or radiation is reflected by a planet, moon, or other celestial bodies, as well as by terrestrial surfaces like water bodies, forests, deserts, and urban areas.
The Appleton–Hartree equation is a fundamental equation in ionospheric physics that describes the behavior of radio waves in a plasma, particularly in the ionosphere. It relates the refractive index of a plasma to various parameters such as the electron density, the frequency of the radio wave, and the Earth's magnetic field. The equation is commonly used to understand how radio waves propagate through the ionosphere, which is a region of the atmosphere that is ionized by solar radiation.
A black body is an idealized physical object that absorbs all incoming radiation, regardless of the frequency or angle of incidence. In other words, a black body is a perfect emitter and absorber of thermal radiation. It does not reflect or transmit any radiation, which distinguishes it from real-world objects that typically reflect some light. Key characteristics of a black body include: 1. **Absorption**: A black body absorbs 100% of the electromagnetic radiation that falls on it.
Effective temperature is a concept used in various scientific fields, particularly in astronomy and climatology, to describe the temperature of an object or system, taking into account various factors that affect its energy balance. 1. **Astronomy**: In the context of stars, the effective temperature is the temperature that a black body (an idealized physical body that absorbs all incoming radiation) would need to emit the same amount of total energy as the star.
Kirchhoff's law of thermal radiation states that, for a body in thermal equilibrium, the emissivity (the efficiency of a body in emitting thermal radiation) at a given wavelength and temperature is equal to the absorptivity (the efficiency of a body in absorbing thermal radiation) at that same wavelength and temperature. This relationship implies that good emitters of thermal radiation are also good absorbers.

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