The Swift–Hohenberg equation is a partial differential equation that describes the evolution of certain patterns in nonlinear systems, particularly in the context of phase transitions and spatially extended systems. It is often used in the study of pattern formation in physical systems, such as fluid dynamics, chemical reactions, and biological systems.

Stress wave communication refers to a method of transmitting information using mechanical stress waves as the medium. This concept can be applied in various contexts, including engineering, telecommunications, and even biological systems. In its more common applications, stress wave communication leverages vibrations or acoustic waves generated by mechanical stress in materials. Information can be encoded into these waves through variations in frequency, amplitude, or phase, similar to how other communication systems might modulate electromagnetic signals.

A Lychrel number is a natural number that is not known to form a palindrome through the iterative process of reversing its digits and adding the result to the original number. A number is considered a palindrome if it reads the same forwards and backwards (for example, 121 or 12321). The Lychrel process typically involves the following steps: 1. Take a natural number n. 2. Reverse its digits to get a new number. 3. Add the reversed number to the original number.

Brahmadeva, often referred to as Brahma, is a deity in Hinduism regarded as the creator god in the Trimurti, which also includes Vishnu the preserver and Shiva the destroyer. Brahma is typically depicted with four heads representing the four Vedas (the primary texts of Hinduism) and is associated with knowledge, creation, and the arts.

Jia Xian (also known as Jiaxian) refers to an ancient Chinese mathematical concept and method related to triangular arrays, often associated with Pascal's triangle. It is named after the Chinese mathematician Jia Xian from the 11th century, who is credited with early formulations of combinatorial mathematics and binomial coefficients.

Pan Chengdong is a name that may refer to a few different things depending on the context. However, if you were referring to an individual, as of my last update, there is no widely known public figure or concept by that name in popular culture or academia. It's possible that Pan Chengdong could be a name of a person in specific local contexts, such as a professional, an artist, or a notable figure in a certain field or region.

Sumio Watanabe is a prominent figure in the field of statistical signal processing and estimation theory. He is particularly known for his contributions to nonlinear filtering and estimation, as well as for his work on the theoretical foundations of information theory. His research has significant implications in areas such as communications, control systems, and machine learning.

Music notation engine. domain-specific language input. The LaTeX of music.

Allen Coombs could refer to a specific person, organization, or concept, but without additional context, it's difficult to pinpoint exactly what you're referring to.

"Women astronomers" refers to female scientists and researchers who specialize in the field of astronomy, which is the study of celestial objects, space, and the universe as a whole. Throughout history, women have made significant contributions to astronomy, often overcoming societal barriers and discrimination in a field that has been traditionally male-dominated.

The Vienna Institute of Demography (VID) is a research institute that focuses on population studies and demographic research. It is part of the International Institute for Applied Systems Analysis (IIASA) and is located in Vienna, Austria. The institute conducts a variety of research related to demographic trends, population dynamics, and related fields, including fertility, migration, aging, and social structures. The VID aims to enhance the understanding of demographic processes and their implications for social and economic development.

As of my last update in October 2021, there is limited information available about someone named Kathy Vivas. It's possible that she could be a private individual, or it could refer to someone who has gained recognition after that time.

David Caminer is a noted figure in the field of computing and is best recognized for his contributions to the development of early computer systems and software. He played a significant role in the evolution of data processing and has been associated with various projects related to the application of computing in business and scientific domains.

Big O notation is a mathematical concept used to describe the performance or complexity of an algorithm in terms of time or space requirements as the input size grows. It provides a high-level understanding of how the runtime or space requirements of an algorithm scale with increasing input sizes, allowing for a general comparison between different algorithms. In Big O notation, we express the upper bound of an algorithm's growth rate, ignoring constant factors and lower-order terms.

Astronomy and astrophysics are two closely related fields of science that study the universe, its components, and the underlying principles governing celestial phenomena. **Astronomy** is the broad study of celestial objects, space, and the universe as a whole. It involves the observation and analysis of planets, stars, galaxies, and other astronomical phenomena. Astronomers often use telescopes and other instruments to gather data about these objects and attempt to understand their properties, behaviors, and the origins of the universe.

Donald Davies was a British computer scientist who is most noted for his work in the field of computer networking and for inventing packet switching. He was born on June 7, 1924, and passed away on May 28, 2009. In the 1960s, he developed the concept of breaking data into smaller packets for transmission over a network, which became a foundational principle for the modern Internet.