The Mie potential is a type of interatomic potential used in molecular dynamics and statistical mechanics to describe the interaction between pairs of particles, typically atoms or molecules. It is a generalized form of the Lennard-Jones potential and is characterized by its ability to represent a wide range of interactions through adjustable parameters.
A TemperatureEntropy (T-s) diagram is a graphical representation used in thermodynamics to illustrate the relationship between temperature (T) and entropy (s) of a system. It is particularly useful for analyzing thermodynamic processes and cycles, especially for various fluids, such as steam in power plants and refrigerants in refrigeration systems.
The thermo-dielectric effect refers to the phenomenon in which the dielectric properties of a material change in response to temperature variations. In simpler terms, dielectric materials, which are insulators that can be polarized by an electric field, can exhibit changes in their ability to store electrical energy (capacitance) or resist electrical conduction based on temperature alterations.
Thermophotovoltaic (TPV) energy conversion is a technology that converts thermal radiation (infrared light) into electricity using photovoltaic (PV) cells. This process can be understood as follows: 1. **Energy Source**: TPV systems typically utilize a heat source, which can be anything from concentrated solar energy to waste heat from industrial processes. The goal is to achieve high temperatures, allowing for efficient thermal radiation.
Theta solvent refers to a specific type of solvent condition in polymer science that is used to describe the behavior of polymers in solution. In the context of polymer chemistry, the concept of theta solvents is related to the way solvent molecules interact with polymer chains. When a polymer is dissolved in a solvent, the interaction between the solvent and the polymer can vary based on the properties of the solvent and the polymer.
Time-domain thermoreflectance (TDTR) is a sophisticated optical technique used to measure the thermal properties of materials, particularly thermal conductivity, thermal diffusivity, and heat capacity at the nanoscale. This method is especially valuable for characterizing thin films, nanostructures, and other materials where traditional thermal measurement techniques may not be applicable.
Puzz 3D is a brand of three-dimensional jigsaw puzzles that were popularized in the 1990s. Unlike traditional flat jigsaw puzzles, Puzz 3D allows you to build structures in three dimensions, adding a new layer of complexity and engagement to puzzle solving. The puzzles typically consist of plastic pieces that interlock to create various architectural or landscape designs, such as famous landmarks, castles, or scenes from nature.
Topological tensor products are a concept in functional analysis and topology that extends the notion of tensor products to include topological vector spaces. In a basic sense, the tensor product of two vector spaces combines them into a new vector space, and when we consider topological vector spaces (which are vector spaces equipped with a topology), we want to create a tensor product that also respects the topological structure.
The small boundary property is a concept in the field of functional analysis and operator theory, particularly in the study of operator algebras and their representations. It is often discussed in relation to the behavior of operator algebras on Hilbert spaces and can have implications in quantum mechanics and other areas of mathematics. In a more specific context, the small boundary property refers to the behavior of certain sets or algebras when embedded in larger structures.
As of my last update in October 2021, there is no widely recognized figure, concept, or term known as "Charles Newton Little." It's possible that it could refer to a lesser-known individual, a fictional character, or a term that has gained prominence after that date.
Andrey Tikhonov was a prominent Russian mathematician known for his significant contributions to several areas of mathematics, including functional analysis, mathematical physics, and numerical analysis. He is perhaps best known for developing the Tikhonov regularization method, which is a technique used to stabilize the solution of ill-posed problems, especially in the field of inverse problems and optimization. This method has applications in various fields, including statistics, machine learning, image reconstruction, and engineering.
Haynes Miller is a prominent mathematician known for his work in the fields of algebraic topology and category theory. He is a professor at the Massachusetts Institute of Technology (MIT) and has made significant contributions to the understanding of stable homotopy theory and related areas. His research often involves the study of spectral sequences, homotopy theory, and the application of category-theoretic methods to problems in topology. Miller is also recognized for his teaching and mentoring of students in mathematics.
As of my last update in October 2021, Maciej Zworski does not seem to be a widely recognized public figure, so additional context is necessary to provide accurate information.
Jean Lannes is a French mathematician known for his contributions to algebraic topology and homotopy theory. He has worked on various topics, including stable homotopy theory, operads, and the study of certain types of algebraic structures in relation to topological spaces. Lannes is particularly recognized for his work on the Lannes-Treumann theory, which relates to the representation of stable homotopy groups and other areas of algebraic topology.
Mary Gertrude Haseman is known for her work in the field of psychology, particularly in the early to mid-20th century. She contributed to the study of child psychology and was involved in various educational and research initiatives. In addition to her academic work, her contributions to the psychological community and publications have also been recognized.
Wu-Chung Hsiang is a prominent mathematician known for his contributions to topology, particularly in the areas of algebraic topology and homotopy theory. He has worked extensively on topics such as homotopy groups, manifolds, and related fields. Hsiang is a professor at the University of Maryland and has published numerous research papers and articles throughout his career. His work has had a significant impact on the mathematical community, especially in the study of manifold theory and geometric topology.
Peter Ozsváth is a mathematician known primarily for his work in the fields of topology and geometry, particularly in relation to three-manifolds and knot theory. He is recognized for his contributions to the development of Heegaard Floer homology, a powerful tool in the study of three-manifolds. Ozsváth has collaborated with other mathematicians, including Zoltán Szabó, to advance the understanding of these complex areas.
Pavel Alexandrov could refer to several different people, but it is most likely that you are asking about Pavel Samuilovich Alexandrov, a notable Russian mathematician known for his work in topology, set theory, and functional analysis. He made significant contributions to the field of mathematics, particularly in developing and formalizing various concepts in topology.
Richard Eliot Chamberlin is a person associated with various fields, but there isn't a widely known figure by that specific name.
PostgreSQL by Ciro Santilli 40 Updated 2025-07-16
Had a look at the source tree, and also felt good.
If Oracle is the Microsoft of database, Postgres is the Linux, and MySQL (or more precisely MariaDB) is the FreeBSD (i.e. the one that got delayed by legal issues). Except that their software licenses were accidentally swapped.
The only problem with Postgres is its name. PostgreSQL is so unpronounceable and so untypeable that you should just call it "Postgres" like everyone else.

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