The Harvard–Smithsonian Center for Astrophysics (CfA) is a research institution that is part of the broader Smithsonian Institution and is affiliated with Harvard University. Located in Cambridge, Massachusetts, the CfA was established in 1973 to bring together astronomers and astrophysicists from both the Smithsonian Astrophysical Observatory and Harvard University.
The NRC Herzberg Astronomy and Astrophysics Research Centre (NRC Herzberg) is a leading research facility in Canada focusing on astronomy and astrophysics. It is part of the National Research Council of Canada (NRC) and serves as a hub for astronomical research, development, and education. NRC Herzberg specializes in various areas of research, including the study of celestial phenomena, the development and operation of astronomical instruments, and the analysis of astrophysical data.
The Bartol Research Institute is a research facility associated with the University of Delaware, primarily focused on astrophysics and space sciences. Established in the early 1960s, the institute conducts studies in various fields, such as solar physics, particle astrophysics, and space weather. The institute is known for its contributions to understanding cosmic phenomena and the solar system, and it typically engages in collaborative projects and grants that further its research goals.
The Dalian Institute of Chemical Physics (DICP) is a research institution located in Dalian, China. It is affiliated with the Chinese Academy of Sciences (CAS) and specializes in various fields of chemical physics and interdisciplinary research. Established in 1949, DICP has made significant contributions to areas such as catalysis, materials science, chemical engineering, energy science, and environmental science.
The Canadian Association of Physicists (CAP) is a national organization in Canada dedicated to promoting the advancement of physics and the interests of physicists. Established in 1945, CAP serves as a professional body for physicists, providing a platform for collaboration, communication, and the dissemination of research and knowledge in the field of physics. The association organizes conferences, publishes research journals, and engages in educational outreach to support students and professionals in physics.
The Leibniz Institute for Solid State and Materials Research (Leibniz-Institut für Festkörper- und Werkstoffforschung, or IFW Dresden) is a research institution located in Dresden, Germany. It is part of the Leibniz Association, which consists of various research institutes in Germany. The IFW Dresden focuses on advanced materials science, including the study of solid-state physics, materials science, and nanotechnology.
The Max Planck Institute for Dynamics and Self-Organization (MPIDS) is a research institution located in Göttingen, Germany. It is part of the Max Planck Society, which is one of the leading organizations for basic research in various scientific fields. The institute focuses on the interdisciplinary study of complex systems, dynamics, and self-organization across various domains.
Moscow State University Faculty of Physics, often referred to as the Faculty of Physics of Lomonosov Moscow State University (MSU), is one of the leading centers for research and education in physics in Russia and the world. Established in 1940, the faculty has a long-standing tradition of excellence in various domains of physics, including theoretical physics, applied physics, quantum mechanics, condensed matter physics, and many other fields.
The British Vacuum Council (BVC) is an organization dedicated to the promotion and advancement of vacuum science and technology in the UK. It serves as a platform for professionals, researchers, and companies involved in vacuum-related fields, facilitating networking, sharing of knowledge, and collaboration. The BVC organizes events such as conferences, workshops, and seminars to disseminate information about developments in vacuum technology, as well as the latest research and applications.
The Katchalski-Katzir algorithm is a method used for solving specific types of combinatorial and optimization problems, particularly in the context of graph theory. However, it is most commonly associated with the problem of finding maximum matchings in bipartite graphs. ### Overview The algorithm was developed by two researchers, Katchalski and Katzir, and is rooted in concepts of network flows and optimization.
The LeRoy radius is a concept used in the field of atomic and molecular physics, particularly in the context of the interaction of charged particles, such as electrons and ions, with neutral atoms or molecules. It is defined as the distance at which the potential energy of interaction between the charged particle and the neutral atom becomes comparable to the thermal energy available at a given temperature. The LeRoy radius is particularly important when considering the conditions under which a charged particle can interact with an atom in a significant way.
The Pariser–Parr–Pople (PPP) method is a computational approach in quantum chemistry used for describing the electronic structure of conjugated systems, such as polymers and molecular systems with delocalized π-electrons. The method is particularly suitable for systems where π-conjugation plays a vital role, as it captures the essential physics of electron correlation and the effects of electron-electron interactions in these systems.
Caesium cadmium chloride is a chemical compound composed of cesium (Cs), cadmium (Cd), and chlorine (Cl) atoms. It is often represented by the formula Cs2CdCl4, which indicates that two cesium ions and one cadmium ion are combined with four chloride ions. This compound belongs to a class of materials known as halides and can exhibit interesting properties that are useful in various applications, such as in the fields of photonics and materials science.
A Coherent Perfect Absorber (CPA) is a device or system that is designed to absorb incoming electromagnetic waves (such as light) completely, without reflecting or scattering any of that energy. It achieves this by using interference effects, where the incoming waves are perfectly matched in phase and amplitude to the waves that are coherently emitted by the absorber. The concept of a CPA is analogous to that of a laser, where energy is emitted coherently.
An erect image is an image that appears upright, meaning that it maintains the same orientation as the object being observed. In optics, when light rays converge to form an image, the orientation of that image can be classified as either erect or inverted. Erect images are typically produced by certain optical devices, such as: 1. **Convex mirrors**: They produce erect virtual images that are smaller than the object.
As of my last update in October 2023, there is no widely recognized organization or concept known as "SCMITR." It’s possible that it could refer to an acronym, a specialized term, or a new entity that emerged after that date.
Dispersion-shifted fiber (DSF) is a type of optical fiber designed to minimize chromatic dispersion across certain wavelengths, particularly in the wavelength range commonly used for long-distance fiber optic communication, such as around 1550 nm. In conventional single-mode fibers, chromatic dispersion—a phenomenon where different wavelengths of light travel at different speeds—can lead to signal broadening over long distances, which ultimately limits the bandwidth and performance of fiber optic systems.
Optic crystals, also known as optical crystals, are materials that possess specific optical properties, making them suitable for a variety of applications in optics and photonics. These crystals can manipulate light in various ways, such as through refraction, diffraction, polarization, and nonlinear optical effects. Some of the key characteristics of optic crystals include: 1. **Transparency**: Optic crystals are often transparent to certain wavelengths of light, which is essential for many optical applications.
The Fresnel–Arago laws refer to principles related to the diffraction of light, which were formulated by Augustin-Jean Fresnel and François Arago in the early 19th century. These laws are fundamental to the understanding of wave optics and describe how light behaves when it encounters obstacles or slits.
A High-Power Field (HPF) is a term commonly used in microscopy to refer to a specific area viewed through a microscope using a high magnification objective lens, typically 40x or higher. The HPF allows for a detailed examination of the specimen, providing a more magnified view that can reveal finer cellular structures and details compared to lower power fields.

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