As of my last update in October 2023, life expectancy data can vary somewhat based on the source and the year of the report. Generally, the World Health Organization (WHO), the United Nations (UN), and the World Bank are reliable sources for this information. Typically, countries with the highest life expectancy often include: 1. **Japan** 2. **Switzerland** 3. **Singapore** 4. **Spain** 5. **Italy** 6. **Australia** 7.
A lift chair is a type of recliner designed to assist individuals, particularly the elderly or those with mobility challenges, in standing up and sitting down safely. The chair is equipped with a motorized mechanism that tilts the seat forward and lifts the user up to a standing position, making it easier for them to get out of the chair without excessive strain. Lift chairs typically come with various reclining positions, allowing users to adjust the backrest and footrest for their comfort.
A carrying pole, also known as a yoke or a shoulder pole, is a long, sturdy pole or beam used to carry loads, typically by balancing the load at either end. This tool is often employed in manual labor, particularly in agricultural and hauling contexts. The carrying pole is designed to rest on the shoulders of the individual carrying it, with weights or containers suspended from either end of the pole.
The term "Derrick" can refer to several things depending on the context: 1. **Engineering and Construction**: A derrick is a type of crane that is typically used for lifting heavy loads. It consists of a framework that supports a pulley and is often used in construction sites or for marine applications.
An overhead crane, also known as a bridge crane, is a type of material handling equipment used to lift and move heavy loads horizontally and vertically within a facility. It consists of a hoist mechanism, a set of traveling wheels, and a bridge that spans the distance between two supporting structures, such as columns or walls.
There are several fictional characters across various media who possess the ability to manipulate light. Here are some notable examples: 1. **Green Lantern (Hal Jordan)** - In the DC Comics universe, Hal Jordan wields a power ring that can create constructs of light. He can manipulate light to various degrees, using it for offense, defense, and even creating illusions.
Standard illuminants are defined reference light sources that serve as a model for the color of light in various applications, particularly in color science, photography, and visual arts. They provide a consistent basis for comparing the color characteristics of different light sources and are essential for ensuring accurate color representation and reproduction. The most commonly referenced standard illuminants are defined by the International Commission on Illumination (CIE).
Visible Light Communication (VLC) is a wireless communication technology that uses visible light to transmit data. This method leverages the visible spectrum, typically between 400 and 700 nanometers, to send information through modulated light sources, such as LEDs (light-emitting diodes).
A bumpy torus is a mathematical concept that refers to a toroidal surface (the shape of a doughnut) that has irregular, wavy, or non-smooth features instead of a perfectly smooth form. In differential geometry and topology, a torus is typically defined as a product of two circles, \(S^1 \times S^1\).
Color mixing is the process of combining different colors to create new colors. There are two primary methods of color mixing: additive mixing and subtractive mixing. 1. **Additive Color Mixing**: This method involves the combination of light colors. When light of different colors is combined, it creates new colors. The primary colors in additive mixing are red, green, and blue (RGB). When these colors of light are mixed together in varying intensities, they produce all other colors.
The daylight factor is a measure used in architecture and building design to assess the amount of daylight that penetrates a space, particularly in interior areas. It indicates the illumination level provided by natural light compared to the amount of daylight available outdoors. The daylight factor is expressed as a percentage and is calculated by comparing the internal illuminance at a specified point in a room with the outdoor illuminance under overcast sky conditions.
Relativistic aberration is a phenomenon predicted by the theory of relativity that describes how the observed direction of light from an object changes depending on the relative motion between the observer and the source of the light at relativistic speeds (that is, speeds comparable to the speed of light).
Spin angular momentum of light refers to a property associated with the polarization of light waves. In quantum mechanics, photons, the quantum particles of light, possess both orbital and spin angular momentum. 1. **Definition**: - The spin angular momentum of light is fundamentally related to the intrinsic angular momentum of the photon, which arises from its polarization state. While photons are massless particles, they still have spin, which can take on discrete values.
Spontaneous Parametric Down-Conversion (SPDC) is a quantum optics process in which a single photon interacts with a nonlinear crystal to produce two lower-energy photons, commonly referred to as "signal" and "idler" photons. This process is significant in quantum mechanics and quantum optics, as it is one of the primary methods for generating entangled photon pairs, which are essential for various applications in quantum information science, such as quantum cryptography, quantum computing, and quantum teleportation.
The term "Terminator" in the context of solar energy or solar astronomy refers to the dividing line between the illuminated side and the dark side of a celestial body, such as the Earth or the Moon. This line is often referred to when discussing the sunrise and sunset areas, as it indicates where sunlight is just beginning to reach or is just leaving the surface of the body.
Injuries from lightning strikes can be severe and life-threatening, affecting individuals who are directly struck by lightning or who experience secondary effects from a nearby strike. The effects of a lightning strike can vary widely, and there are several potential injuries and complications associated with them: 1. **Cardiac Arrest**: Lightning can disrupt the heart's electrical system, leading to cardiac arrest. Victims may require immediate resuscitation efforts.
The Austrian Lightning Detection and Information System (ALDIS) is a network designed to detect and provide information about lightning activity across Austria. The system utilizes a network of sensors and advanced technology to monitor lightning strikes, enabling accurate real-time detection, data collection, and analysis. Key features and functions of ALDIS include: 1. **Real-Time Monitoring**: ALDIS continuously monitors lightning activity, allowing for real-time tracking of storms and lightning strikes across the country.
An **asymmetric norm** is a type of mathematical function used in functional analysis and related fields to measure the size or length of vectors in a way that does not treat the positive and negative directions equally. This contrasts with traditional norms (like the p-norm), which are symmetric and obey the property that the norm of a vector and its negation are equal.
Harvesting lightning energy refers to the concept of capturing and utilizing the immense electrical power generated by lightning strikes. Lightning is a natural phenomenon that discharges electricity in a brief but powerful burst, with the energy in a single strike estimated to be enough to power a small town for a day. The idea of harvesting this energy raises significant technical challenges and safety concerns due to the unpredictable nature of lightning and the risks associated with high-voltage phenomena.
Thunderbolt is a high-speed hardware interface developed by Intel, in collaboration with Apple, that allows for the connection of external peripherals to computers. It combines data, video, audio, and power in a single connection and is designed to provide fast data transfer rates and support a variety of devices such as monitors, storage devices, and docks.
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!
Intro to OurBigBook
. Source. We have two killer features:
- 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-calculusArticles 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/derivativeVideo 2. OurBigBook Web topics demo. Source. - 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.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
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. - Infinitely deep tables of contents:
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





