Breakdown voltage refers to the minimum voltage that causes a portion of an insulator to become electrically conductive. When the voltage across an insulating material exceeds its breakdown voltage, the material undergoes a process where it can no longer act as an insulator and begins to conduct electricity. This is a critical parameter in the design and operation of electronic components, such as capacitors, diodes, transistors, and insulators in power systems.
Finite strain theory is a framework used in the field of continuum mechanics to describe the behavior of materials undergoing large deformations. Unlike small strain theory, which assumes that deformations are infinitesimally small and uses linear approximations, finite strain theory accounts for significant changes in shape and size of materials. Key aspects of finite strain theory include: 1. **Large Deformations**: It is specifically designed to handle situations where the deformations are not minor and where geometric nonlinearity cannot be ignored.
Abjad by Ciro Santilli 40 Updated 2025-07-16
Unlike abugida, these actually make you guess vowels, which are mostly or all not written down in any way. Terrible.
E.g.: the main Arabic script.
ANSI C12.1 is a standard developed by the American National Standards Institute (ANSI) for the specification of electric utility meters. More specifically, it relates to the general requirements for the performance of electric watt-hour meters, which are devices used to measure electrical energy consumption in homes and businesses. Key aspects of ANSI C12.1 include: 1. **Meter Accuracy**: The standard defines the accuracy requirements for various types of electric meters to ensure reliable and precise readings of energy consumption.
Quasielastic neutron scattering (QENS) is a technique used in materials science and condensed matter physics to probe the dynamics of atoms or molecules within a sample. It is particularly useful for studying systems that exhibit localized or diffusive motions, such as glasses, polymers, proteins, and various other materials. ### Key Features of QENS: 1. **Neutron Scattering**: QENS is based on scattering neutrons off a sample.
Copper-clad steel is a composite material that consists of a core of steel covered with an outer layer of copper. This combination leverages the beneficial properties of both metals, resulting in a product that offers the strength and structure of steel along with the excellent conductivity, corrosion resistance, and aesthetic appeal of copper.
A flux-switching alternator (FSA) is a type of electrical machine that combines features of both alternators (which generate alternating current) and switched reluctance machines. It is designed to be highly efficient and compact, making it suitable for various applications, including electric vehicles and renewable energy systems. ### Key Features of Flux-Switching Alternators: 1. **Construction**: The design typically uses permanent magnets and a segmented rotor.
Engine engineers, often referred to as mechanical engineers or more specifically, powertrain engineers, specialize in the design, development, testing, and production of engines and other power systems for vehicles, aircraft, and various machinery. Their work primarily focuses on understanding and improving the performance, efficiency, and reliability of engines, whether they are internal combustion engines, electric motors, or hybrid systems.
The Merritt engine, often referred to in the context of railway systems, is a type of power supply equipment developed primarily for electric traction systems, particularly in the context of urban transit and railways. However, it's worth noting that details about specific adaptations, designs, or models may vary widely based on the manufacturer or the specific context in which it is used. The name "Merritt" might also refer to various technologies, organizations, or innovations depending on the sector.
SO(10) is a special orthogonal group that is of significant interest in the field of theoretical physics, particularly in the context of grand unified theories (GUTs) and particle physics. Here are some key points about SO(10): 1. **Mathematical Definition**: The group SO(10) consists of all \(10 \times 10\) orthogonal matrices with determinant +1.
A fan heater is a type of portable heating device that uses a fan to distribute warm air throughout a room. It typically consists of an electric heating element that warms the air and a fan that blows the heated air into the surrounding space. Fan heaters are commonly used for quick heating of small to medium-sized areas, such as bedrooms, living rooms, or offices. They are generally compact and easy to transport, making them versatile for various settings.
A futon dryer, often referred to as a "futon dryer" or "futon clothes dryer," is a specialized device primarily used in Japan for drying futons, which are traditional Japanese bedding items. This equipment is designed to efficiently dry and warm futons, making them comfortable for use, especially in colder months. Typically, a futon dryer operates by blowing warm air into the futon through a nozzle.
"Bellmer" can refer to different subjects depending on the context. Here are a few possibilities: 1. **Hans Bellmer (1902–1975)**: A German surrealist photographer and sculptor known for his provocative and unsettling artworks, which often featured dolls and uncanny representations of the human body. His work explores themes of sexuality, desire, and the human form.
A molecular machine refers to an assembly of molecules that can perform specific tasks or functions at the molecular level, usually through mechanical motion or changes in structure. These machines can carry out tasks such as transporting cargo, catalyzing chemical reactions, or responding to environmental stimuli. Molecular machines are often constructed using components like organic molecules, proteins, or synthetic polymers, and they can be designed to convert energy into motion or perform work in a controlled manner.
The XGC88000 is a model of crawler crane produced by XCMG, a large construction machinery manufacturer based in China. This crane is designed primarily for heavy lifting applications in various sectors such as construction, oil and gas, and infrastructure projects. Key features of the XGC88000 may include: 1. **Lifting Capacity**: It has a significant lifting capacity, capable of handling heavy loads, making it suitable for lifting large precast elements or heavy machinery.
**Obesity** is a medical condition characterized by an excess amount of body fat. It is typically determined using the Body Mass Index (BMI), which is calculated using a person's weight and height. A BMI of 30 or higher is generally considered obese. Obesity can lead to various health issues, including type 2 diabetes, heart disease, certain cancers, sleep apnea, and joint problems. Factors contributing to obesity include genetics, environment, lifestyle choices, and underlying health conditions.
The Varanasi Multi-Modal Terminal is a significant infrastructure project in India aimed at enhancing connectivity and facilitating the movement of goods and passengers through a combination of different transportation modes. Located on the banks of the Ganges River in Varanasi, Uttar Pradesh, the terminal is designed to support riverine transport and provide an efficient interface between inland waterways, roadways, and railways.
Vitreous enamel, also known as porcelain enamel, is a type of glass coating that is fused to a metal surface through a high-temperature firing process. The resultant glassy coating is typically used to enhance the appearance and durability of metal objects, providing a variety of benefits, including: 1. **Aesthetic Appeal**: Vitreous enamel can be produced in a wide range of colors and finishes, allowing for artistic expression and design.

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