The solar core refers to the innermost layer of the Sun, where nuclear fusion occurs. It is located at the center of the Sun and extends approximately 20-25% of the Sun's radius. The conditions in the solar core are extreme, with temperatures reaching about 15 million degrees Celsius (27 million degrees Fahrenheit) and pressures around 200 billion times the atmospheric pressure on Earth.
A Sun chart, also known as a solar chart or solar return chart, is a type of astrological chart that is created for the moment the Sun returns to the exact position it occupied at the time of a person's birth. This event occurs annually around the person's birthday and is used in astrology to analyze what the coming year may hold for the individual.
The McDonnell Douglas High Speed Civil Transport (HSCT) was a proposed supersonic transport aircraft project initiated by McDonnell Douglas in the late 1980s and early 1990s. The aircraft was intended to provide faster-than-sound air travel for commercial passengers, potentially reducing transcontinental flight times significantly compared to conventional subsonic jets. The HSCT project aimed to achieve cruise speeds of around Mach 2.
"Some Girls Do" is a song by the American rock band Racey, released in 1978. It was part of their debut album, "Smash and Grab." The track is known for its upbeat tempo and catchy melody, characteristic of the pop-rock and power pop genres of that era. The band Racey gained some popularity in the late 1970s and early 1980s, particularly in the UK.
A Scholte wave is a type of surface wave that propagates along the interface between a solid and a fluid, or through a solid that is in contact with a semi-infinite medium. Named after the Dutch physicist A. Scholte, these waves occur in situations where an elastic solid is in contact with a liquid or gas, such as the bottom of a body of water, and have applications in fields such as geophysics, materials science, and engineering.
There are several alternatives to car use that can help reduce traffic congestion, lower emissions, and promote a healthier lifestyle. Here are some common options: 1. **Public Transportation**: Buses, trains, subways, and trams offer convenient ways to travel without a car. They are often more economical and can reduce the number of vehicles on the road. 2. **Bicycling**: Riding a bicycle is a great way to get around, especially for shorter distances.
The Weibull distribution is a continuous probability distribution named after Wallodi Weibull, who described the distribution in 1951. It is widely used in reliability engineering, life data analysis, and survival studies, among other fields, to model the time until an event occurs, such as failure or death.
"Complete Streets" is a transportation policy and design approach aimed at creating roadways that prioritize all users, including pedestrians, cyclists, motorists, and public transportation riders. The goal is to provide safe and accessible transportation options for everyone, regardless of age or ability. Key features of Complete Streets include: 1. **Multimodal Infrastructure:** Development of infrastructure that accommodates various forms of transportation, such as bike lanes, sidewalks, crosswalks, public transit facilities, and roadways for vehicles.
NEC Green Wheels is an initiative by NEC Corporation focused on promoting sustainable and environmentally friendly transportation solutions. It aims to address challenges related to traffic congestion, carbon emissions, and the need for efficient mobility in urban areas. The initiative often involves the development and implementation of electric vehicles (EVs), smart transportation systems, and related technologies that enhance sustainability in urban mobility.
Smart growth is an urban planning and development approach that aims to create sustainable, livable communities by encouraging efficient land use, transportation options, and environmental stewardship. The key principles of smart growth include: 1. **Compact Development**: Promoting higher density development and mixed-use zoning to reduce the need for extensive infrastructure and urban sprawl. 2. **Walkability**: Designing neighborhoods that encourage walking and biking, making it easier for residents to access shops, services, and public transportation.
A trolleybus is a type of electric bus that draws power from dual overhead wires (known as trolley poles or catenary wires) using two metal arms or poles. These vehicles are similar to trams or streetcars but operate on roadways rather than tracks. Trolleybuses are designed to be more environmentally friendly than diesel buses, as they produce no tailpipe emissions when operating.
The Way of the Roses is a long-distance walking and cycling route in the north of England, spanning approximately 170 miles from the west coast in Morecambe to the east coast in Bridlington. The route primarily follows scenic trails and countryside, connecting the historic cities of York and Lancaster while passing through picturesque landscapes, including the Yorkshire Dales and the Forest of Bowland.
Anders Karlsson is a physicist known for his work in the field of condensed matter physics, particularly in the areas of quantum mechanics, nanotechnology, and materials science. Depending on the context, he may have contributed to various research topics related to these fields, including studies on the properties of materials at the nanoscale, quantum phenomena, and advanced fabrication methods for developing new materials.
As of my last update in October 2021, there is no widely recognized public figure or topic specifically known as "Stacie Powell." It's possible that she may be a private individual, a recent emergence in news or media after that date, or a less prominent individual in a specific context.
"Louise Johnson" could refer to various people or concepts, but it is most commonly associated with a well-known figure in the context of academic or professional work, or it may be a name of notable individuals in various fields. Without additional context, it's difficult to pinpoint which Louise Johnson you are referring to.
Prineha Narang is an accomplished physicist and researcher known for her work in the field of quantum mechanics, particularly in relation to quantum information and many-body physics. She is an Assistant Professor at Harvard University and has made significant contributions to the understanding of complex quantum systems, including studies on entanglement and quantum state engineering. Her research often combines theoretical and computational approaches to explore the behavior of quantum systems and their implications for quantum computing and other advanced technologies.
Gretchen Kalonji is a prominent figure recognized for her contributions in the field of science and technology policy. She has held various significant positions, including in academia and international organizations, focusing on science and technology development, policy-making, and capacity building in developing countries. Kalonji has been involved with organizations like the United Nations Educational, Scientific and Cultural Organization (UNESCO) and has worked towards enhancing the role of science and technology in sustainable development.
Julie Schoenung is not a widely recognized public figure or topic as of my last knowledge update in October 2021. It is possible that she is a private individual, an emerging figure, or someone associated with a specific field or context that has gained attention after that time.
Rachel A. Segalman is an American scientist known for her work in the field of chemical engineering, particularly in areas related to polymers, materials science, and nanotechnology. She has been involved in research on the properties and applications of various materials, particularly in relation to energy and environmental technologies. Segalman has also held academic positions, contributing to education and research in her field.

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