Applied Spectroscopy is a peer-reviewed scientific journal that focuses on the field of spectroscopy, which is the study of the interaction between matter and electromagnetic radiation. The journal covers a wide range of topics related to various spectroscopic techniques, including but not limited to infrared, ultraviolet-visible, nuclear magnetic resonance (NMR), mass spectrometry, and Raman spectroscopy.
Bipolar magnetic semiconductors are a class of materials that exhibit both magnetic properties and semiconductor characteristics. These materials can conduct electricity like traditional semiconductors while also displaying magnetic ordering, which is typically associated with ferromagnetic or antiferromagnetic behavior. The term "bipolar" in this context often refers to the ability of the semiconductor to support both types of charge carriers: electrons (negative charge carriers) and holes (positive charge carriers).
A manifold is a mathematical space that, in a small neighborhood around each point, resembles Euclidean space. Manifolds allow for the generalization of concepts from calculus and geometry to more abstract settings. ### Key Characteristics of Manifolds: 1. **Locally Euclidean**: Each point in a manifold has a neighborhood that is homeomorphic (topologically equivalent) to an open subset of Euclidean space \( \mathbb{R}^n \).
The Dirac equation in curved spacetime is an extension of the Dirac equation, which originally describes the behavior of spin-1/2 particles (like electrons) in flat spacetime, to a general curved spacetime described by general relativity. The original Dirac equation incorporates quantum mechanics and special relativity but does not take into account the effects of gravity.
The Rashba–Edelstein effect refers to a phenomenon observed in spintronic materials, where an electric current can induce a non-equilibrium spin polarization in a system. This effect arises from the interplay between spin-orbit coupling and the flow of charge carriers, typically in two-dimensional electron systems. The Rashba effect, named after physicist Emmanuel Rashba, describes the splitting of electronic states in a system with structural inversion asymmetry due to spin-orbit coupling.
The Whittaker model, often referred to in various contexts, primarily pertains to mathematical and statistical modeling in different fields, such as ecology, finance, and natural sciences. However, one of the more prominent references is the Whittaker model in the context of population dynamics and ecology. ### Whittaker's Classification of Plant Communities: In ecology, the Whittaker model refers to a classification system developed by the ecologist Robert Whittaker in the 1950s.
The term "Jewish American physicists" refers to physicists in the United States who are of Jewish heritage or descent. This group includes many notable scientists who have made significant contributions to various fields of physics, including theoretical physics, experimental physics, and applied physics.
VisAD (Visualization for Algorithm Development) is a software system designed for interactive visualization and analysis of scientific data. Developed primarily to support the visualization of multidimensional data, VisAD enables users to create graphical representations of complex datasets, making it easier to analyze and interpret scientific information. Key features of VisAD include: 1. **Multidimensional Data**: It supports various data types and dimensions, allowing scientists to visualize data across multiple variables and time dimensions.
Marlon Dumas is a prominent figure in the field of business process management (BPM) and information systems. He is known for his work in process modeling, process mining, and workflow management. Dumas has contributed to both academic research and practical applications in BPM, and he has been involved in the development of various methodologies and tools in this area.
An Erector Set is a construction toy designed for building various structures and models using metal beams, plates, and other components. The set typically includes a selection of bolts, nuts, and various mechanical parts, allowing builders to create everything from simple shapes to complex mechanical devices. The pieces are often connected using screws and nuts, enabling a wide range of models to be assembled and disassembled. The Erector Set was first introduced in the early 20th century by the A.C.
UPd₂Al₃ is a chemical compound composed of uranium (U), palladium (Pd), and aluminum (Al). It belongs to a class of materials known as intermetallic compounds, which are characterized by the orderly arrangement of two or more different metal atoms in a crystalline structure. In UPd₂Al₃, the composition indicates that there are one uranium atom, two palladium atoms, and three aluminum atoms in the formula.
Constructivism in the philosophy of mathematics is a viewpoint that emphasizes the importance of constructive proofs and methods in mathematical practice. Constructivists assert that mathematical objects do not exist unless they can be explicitly constructed or demonstrated through a finite procedure. This philosophical stance diverges from classical mathematics, which often accepts the existence of mathematical objects based on non-constructive proofs, such as those that rely on the law of excluded middle or other principles that do not provide an explicit construction.
Classical control theory is a framework for analyzing and designing control systems that operate in continuous time. It primarily deals with linear time-invariant (LTI) systems, where the behavior of the system can be described using ordinary differential equations. The main components of classical control theory include: 1. **System Modeling**: Classical control relies on mathematical models to represent dynamic systems. These models can be expressed in terms of transfer functions, which relate the input to the output of a system in the frequency domain.

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