The Matérn covariance function is a widely used covariance function in spatial statistics and Gaussian processes. It is particularly appreciated for its flexibility in modeling spatial correlations due to its parameters that allow for varying levels of smoothness.
The Canadian Geophysical Union (CGU) is a professional organization that promotes the study and understanding of geophysical sciences in Canada. It aims to foster communication and collaboration among scientists and researchers involved in the various fields of geophysics, such as seismology, geomagnetism, hydrology, atmospheric sciences, and more. The CGU organizes conferences, workshops, and meetings to facilitate the exchange of knowledge and research findings.
The Environmental and Engineering Geophysical Society (EEGS) is a professional organization that focuses on the application of geophysical methods for environmental and engineering purposes. The society aims to promote the understanding and advancement of geophysical techniques in addressing environmental challenges, assessing site conditions, and supporting engineering projects. EEGS provides a platform for professionals and researchers in the field to share knowledge, collaborate on projects, and disseminate findings through conferences, workshops, publications, and educational resources.
The Seismological Society of America (SSA) is a professional organization dedicated to advancing the study of seismology and related disciplines. Founded in 1906, the SSA aims to promote research and education related to earthquakes and seismic activity, improve understanding of seismic hazards, and foster collaboration among scientists, engineers, and the public.
The Chamber of Geophysical Engineers of Turkey (in Turkish, "Türkiye Jeofizik Mühendisleri Odası") is a professional organization established to represent and support geophysical engineers in Turkey. It focuses on several key areas: 1. **Professional Standards**: The chamber aims to establish and uphold professional standards within the field of geophysics, ensuring that practicing geophysical engineers adhere to ethical and quality guidelines.
Vehicle location data refers to information that indicates the geographical position of a vehicle at any given time. This data is typically obtained through various technologies, such as GPS (Global Positioning System) or other location-tracking devices. Key components and characteristics of vehicle location data include: 1. **Latitude and Longitude**: The most common format for expressing location data, representing the coordinates of the vehicle's position on the Earth's surface.
Facebook Bluetooth Beacon is a technology that allows businesses to use Bluetooth beacons in conjunction with the Facebook platform to enhance customer engagement and interactions. These beacons are small devices that transmit signals to nearby smartphones, enabling businesses to send targeted notifications and content to users who have opted in to receive messages through the Facebook app.
Lightning detection refers to the methods and technologies used to identify and locate lightning strikes. These systems are essential for various applications, including weather forecasting, aviation safety, outdoor event management, and research into storm behavior. There are several key aspects to lightning detection: 1. **Types of Detection Systems**: - **Ground-based Networks**: These systems use multiple sensors distributed over a wide area to detect the electromagnetic signals produced by lightning strikes.
A pseudolite is a type of device used in navigation and positioning systems that mimics the signals of a satellite. The term combines "pseudo" (meaning false or imitation) and "lite" (short for satellite). Pseudolites are often employed in areas where satellite signals may be weak or obstructed, such as in urban canyons, mountainous regions, or indoors.
Francis Allotey was a prominent Ghanaian physicist and academic, renowned for his contributions to theoretical physics and mathematics. He was especially known for his work in the field of soft matter physics and for his development of the Allotey formalism, which is related to quantum mechanics and molecular scattering. Born on November 9, 1933, in Ghana, Allotey had a distinguished academic career, holding various positions at several educational institutions.
Ana Fernández Militino is a Spanish mathematician known for her work in statistics, particularly in the areas of statistical inference and statistical modeling. She has contributed to the field through research, teaching, and publications.
Bernhard Riemann was a German mathematician born on September 17, 1826, and he died on July 20, 1866. He made significant contributions to various fields of mathematics, including analysis, differential geometry, and number theory.
Otfried Nassauer is a prominent German expert in the field of non-proliferation and disarmament, particularly focused on nuclear weapons and their implications for global security. He is known for his work as the director of the Institute for Peace Research and Security Policy at the University of Hamburg, where he has contributed to policy discussions and research related to nuclear arms control and disarmament efforts.
German geophysicists are scientists from Germany who specialize in the study of the Earth's physical properties and processes, including its magnetic, gravitational, electric, and seismic characteristics. Geophysicists employ various methods and technologies to analyze the Earth's structure, dynamics, and the various phenomena occurring within the planet, such as earthquakes, volcanic activity, and the movement of tectonic plates.
Cornelia Denz is a prominent figure in the field of optics and photonics. She is known for her research in areas such as laser technology, optical metrology, and the development of advanced imaging techniques. Denz has contributed significantly to the understanding of nonlinear optics and the use of optical systems for various applications. In addition to her research work, she is also recognized for her role in education and mentoring in the field of physics and engineering.
Christine Bessenrodt is a mathematician known for her work in combinatorial mathematics, particularly in the area of combinatorial enumeration and algebra.
Petra Schwille is a prominent biophysicist known for her research in the field of cell biology and biophysics. She is particularly recognized for her work on the mechanisms of cell division and the properties of biological membranes. Schwille has contributed significantly to understanding how cells maintain their structures and functions, often using advanced techniques such as single-molecule microscopy to study the dynamics of biological processes at the molecular level.
Fritz Borgnis (born 1899, date of death unknown) was a notable figure in the field of music, specifically recognized for his contributions as a pianist and composer. His work encompassed various genres and styles, showcasing his versatility and musical talent. He may also be connected to certain educational endeavors or artistic collaborations throughout his career.
Roland Busch is a prominent figure best known as the President and Chief Executive Officer of Siemens AG, a major global technology company based in Germany. He has been with Siemens for many years, serving in various leadership roles across different divisions of the company. Busch took over as CEO in February 2021, succeeding Joe Kaeser. Under his leadership, Siemens has focused on areas such as digitalization, automation, and sustainability, aiming to drive innovation and efficiency in various industries.
The Earth-centered, Earth-fixed (ECEF) coordinate system is a three-dimensional Cartesian coordinate system that is fixed relative to the Earth. In this system, the origin is located at the Earth's center of mass, and the axes are aligned in a specific way to account for the Earth's rotation and shape.

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