Continental Portugal refers to the portion of Portugal that is located on the mainland of Europe, as opposed to its islands, which include the Azores and Madeira. The term is often used to distinguish the mainland from these island regions. Continental Portugal encompasses the majority of the country's population and major cities, including Lisbon (the capital), Porto, and Coimbra, and features a diverse geography, including mountains, valleys, and a coastline along the Atlantic Ocean.
ITL 1 (Intermediate Tier Level 1) statistical regions of England are part of the statistical geography framework used by the Office for National Statistics (ONS) to collect, analyze, and publish data related to various aspects of England. These regions provide a way to aggregate data at a level that is more granular than broader categories (like regions) but larger than local areas (like counties or districts).
Italy is divided into 20 regions, each with its own distinct culture, history, and geography. Here’s an overview of the regions: 1. **Abruzzo** - Known for its mountains and national parks, it features a mix of coastal and inland areas. 2. **Basilicata** - A mountainous region between the Tyrrhenian and Ionian Seas, famous for its historical sites, including the Sassi of Matera.
The Republic of Ireland is a sovereign nation located on the island of Ireland, which it shares with Northern Ireland, a part of the United Kingdom. The capital and largest city of the Republic of Ireland is Dublin. It covers approximately 70,273 square kilometers (27,133 square miles) and has a population of about 5 million people.
South Italy generally refers to the southern region of the Italian Peninsula and encompasses several regions, which are known for their distinct culture, history, and landscape. The main regions often considered part of South Italy include: 1. **Campania** - Home to Naples, this region is famous for its coastal beauty, historical sites, and cuisine, including dishes like pizza.
The Oren–Nayar reflectance model is a widely used model in computer graphics that describes how light reflects off rough surfaces. It was introduced by Oren and Nayar in 1994 as an improvement over the traditional Lambertian reflectance model, which assumes perfectly diffuse reflection. The Lambertian model is straightforward and works well for smooth surfaces, but it fails to accurately represent the complex interaction of light with rough surfaces that have microfacets.
The 3-4-3-12 tiling refers to a specific way of covering a surface, often a plane or a geometric shape, using tiles or shapes that correspond to a specific arrangement or pattern. This term is often associated with a type of tiling that uses triangles and quadrilaterals.
Space physics is a branch of science that studies the physical processes and phenomena occurring in space, particularly in relation to the interactions between charged particles and magnetic fields in the solar system and beyond. It encompasses a wide range of topics, including, but not limited to: 1. **Plasma Physics**: Understanding the behavior of ionized gases (plasmas), which are prevalent in space environments, such as the solar wind and interstellar medium.
The United States Space Force (USSF) is a branch of the U.S. Armed Forces, established to organize, train, and equip military personnel to conduct space operations. It was officially established on December 20, 2019, as part of the National Defense Authorization Act, making it the first new military branch since the establishment of the Air Force in 1947.
Decompression accidents and incidents typically refer to events that occur during the process of returning from high pressure environments, such as scuba diving or deep-sea diving, where divers are exposed to increased levels of pressure. The term often encompasses two major areas: 1. **Decompression Sickness (DCS)**: Also known as "the bends," DCS occurs when dissolved gases, primarily nitrogen, come out of solution and form bubbles in the body as a diver ascends too quickly from deep water.
AS/NZS 3788 is a standard developed by Standards Australia and Standards New Zealand that provides guidelines for the management and integrity of pressure equipment. Specifically, it focuses on the in-service inspection and maintenance of pressure vessels, piping, and other pressure equipment. The standard aims to ensure that such equipment operates safely and remains compliant with regulatory and industry requirements.
A Fisher-Porter tube is a type of laboratory apparatus used to measure the concentration of gases, specifically oxygen, in a gas mixture. It operates on the principle of gas absorption, where a gas flows through a liquid and allows for the measurement of the gas's partial pressure. The device utilizes a liquid, often containing a chemical reagent that reacts with oxygen, to help determine the concentration of oxygen in the gas stream.
A hydrogen tank is a storage container used to hold hydrogen gas, typically under high pressure. These tanks are designed to safely store and transport hydrogen for various applications, including fuel cell vehicles, industrial processes, and energy storage systems. There are several key features and characteristics of hydrogen tanks: 1. **Material**: Hydrogen tanks are often made from materials that can withstand high pressures, such as aluminum or composite materials (e.g., carbon fiber reinforced polymers). These materials help reduce weight while maintaining strength.
Nuclear reactor physics is the branch of physics that deals with the study of nuclear reactions and the behavior of materials within a nuclear reactor. It encompasses the principles and processes underlying the generation of nuclear energy through fission, the interactions of neutrons with reactor materials, and the design, operation, and safety considerations of nuclear reactors.
Testing and inspection of diving cylinders are critical processes to ensure the safety and reliability of cylinders used in scuba diving and other underwater activities. These cylinders hold compressed gas, typically air or other breathing mixtures, and need to be maintained to prevent accidents and ensure that divers can rely on their equipment. Here’s an overview of the key components involved in the testing and inspection of diving cylinders: ### 1.
A circulator pump, also known as a circulation pump, is a type of pump specifically designed to circulate fluids within a heating, cooling, or plumbing system. These pumps play a crucial role in various applications, including: 1. **Heating Systems**: In hydronic heating systems, circulator pumps are used to move heated water from the boiler through pipes to radiators or baseboards, and then back to the boiler. This ensures efficient heating throughout a space.
A froth pump is a type of pump specifically designed to handle slurries with a significant amount of air or gas entrained, often referred to as "froth." These pumps are commonly used in mining, mineral processing, and various industrial applications where the movement of a mixture containing liquids, solids, and air is required.
A fuel pump is a critical component in an internal combustion engine vehicle, responsible for delivering fuel from the gas tank to the engine's fuel injection system or carburetor. There are generally two types of fuel pumps: 1. **Mechanical Fuel Pumps**: These pumps are often found in older vehicles and are usually operated by the engine's camshaft. They rely on a diaphragm mechanism to draw fuel from the tank and push it towards the engine.
A gear pump is a type of positive displacement pump that uses the meshing of gears to pump fluid. It consists of two or more gears, which are typically enclosed in a casing. When the gears rotate, they create a vacuum on the inlet side, drawing fluid into the pump, and then force it out on the outlet side as the gears continue to turn. Gear pumps are widely used in various industries for their reliability and efficient handling of viscous fluids.

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