The chain rule is a fundamental concept in calculus used to differentiate composite functions.

Steve Mould is a British science communicator, presenter, and author known for his engaging style of explaining complex scientific concepts in a relatable way. He has a background in physics and has worked on various science-related television programs. Additionally, he is popular on social media platforms, particularly YouTube, where he shares experiments, demonstrations, and insights into scientific principles. Mould aims to make science accessible and enjoyable for a broad audience, leveraging his expertise to inspire curiosity and understanding in viewers of all ages.

N-body simulation is a computational method used to study and simulate the dynamics of systems with a large number of interacting particles or bodies. In astrophysics, this typically involves celestial bodies such as stars, planets, and galaxies, but the concept can be applied to any system where multiple entities exert gravitational or other forces on each other.

George Faber was a British politician who served as a Member of Parliament (MP) for the Conservative Party. He was elected to represent the constituency of Haverfordwest in Wales. Faber was known for his involvement in various political and parliamentary activities during his tenure. His career included a focus on issues relevant to his constituents and contributions to national discussions. However, specific details about his policies, political impact, and the time frame of his service may require further research or context.

Proximity communication refers to the exchange of information between devices, systems, or individuals within close physical range of one another. This type of communication leverages various technologies and protocols to facilitate interactions based on the proximity of the communicating parties. Here are some key aspects of proximity communication: 1. **Short-range Technologies**: Common technologies used in proximity communication include Bluetooth, NFC (Near Field Communication), infrared, and Wi-Fi Direct.

"What's New" is a studio album by American singer Linda Ronstadt, released in 1983. It features orchestral arrangements of standards from the Great American Songbook, primarily focusing on romantic ballads. The album includes songs such as "I've Got a Crush on You," "Someone to Watch Over Me," and "My Funny Valentine". Ronstadt collaborated with the legendary arranger and conductor Nelson Riddle for this project, which was notable for its lush orchestration and vocal performances.

The Norden bombsight was a highly advanced bomb aiming system developed by the Norden Company during World War II. It was designed to allow bomber aircraft to accurately deliver bombs on target while flying at high altitudes and during high-speed flight. The bombsight used a combination of mechanical and optical technology to calculate the precise aim point for bomb release, taking into account factors such as airspeed, altitude, wind, and the aircraft's trajectory.

Hanna Neumann (1914–1993) was a prominent German mathematician known for her contributions to group theory, particularly in the area of infinite groups. She made significant advances in the understanding of groups and their substructures. Neumann was also known for her work on the algebraic properties of groups and played a key role in the development of certain concepts within group theory.

Janny Leung is a prominent researcher in the field of computer science, particularly known for her work in natural language processing (NLP) and computational linguistics. She has focused on various aspects of language technology, including machine learning applications for language understanding and generation. Leung has contributed to significant advancements in how machines can process and interpret human language.

George Frederick Charles Searle was a notable figure in the field of astronomy during the 19th century. He was primarily known for his work in observational astronomy and is particularly recognized for his discovery of a number of astronomical objects, including the planet Uranus's moons and several asteroids. His contributions were part of the broader scientific efforts during a period of significant advancements in astronomy.

Chopper pumps are a type of centrifugal pump designed specifically to handle solids and slurries found in wastewater and sewage applications. They are equipped with a chopping mechanism—usually a set of rotating blades—that reduces the size of solid materials as they enter the pump. This feature allows the pump to efficiently move a mixture of liquids and solids without clogging or damaging the pump components.

A Cartan connection is a mathematical structure that generalizes the concept of a connection on a manifold, particularly in the context of differential geometry and the study of geometric structures. It is named after the French mathematician Élie Cartan. In more technical terms, a Cartan connection can be understood as a way to define parallel transport and curvature in a setting where traditional notions of a connection (like those found in Riemannian geometry) may not apply straightforwardly.

The India Mark II is a type of hand pump widely used in rural areas of India for drawing groundwater. It was developed as a means to provide reliable access to drinking water in regions where water scarcity is a significant issue. The pump is designed to be easy to operate and maintain, making it suitable for rural communities. Some of the key features of the India Mark II pump include: 1. **Durability**: It's constructed from materials that can withstand harsh environmental conditions, ensuring a long service life.

Frank den Hollander is a notable mathematician primarily known for his work in the field of probability and statistics. He has made significant contributions to various areas, including stochastic processes and the theory of large deviations. In addition to his research, he is involved in education and has authored or co-authored several scholarly articles and books related to mathematics.

"Cass County" is an album by American country music artist Don Henley, released on September 25, 2015. It is notable for being Henley's first solo studio album in fifteen years, following his 2000 album "Inside Job." The album features a mix of original songs and covers, showcasing Henley's signature blend of country, rock, and folk influences. It includes collaborations with various artists, such as Vince Gill, Jamey Johnson, and Dolly Parton.

Jury research refers to the practice of conducting studies or simulations to gather insights about how jurors may respond to evidence, arguments, and various aspects of a case presented in a legal trial. This research is often used by attorneys and legal professionals to prepare for actual trials and to shape their strategies based on the potential reactions and decision-making processes of jurors.

Cássia Rock Eller, more commonly known simply as Cássia Eller, was a Brazilian singer and songwriter, born on December 10, 1962, in Rio de Janeiro and tragically passing away on December 29, 2001. She was known for her distinctive voice and powerful performances, which blended various genres including rock, MPB (Música Popular Brasileira), and pop.

A pseudo-algebraically closed field is a concept from field theory, particularly in the area of model theory and algebraic geometry. It is a type of field that can be seen as a generalization of algebraically closed fields, but without all the restrictive properties of a complete algebraic closure.

"So Fine" is an album by the American rock duo Loggins and Messina, released in 1975. This was their fifth studio album and features a blend of rock, pop, and folk elements that the duo is known for. The album includes tracks that showcase their harmonious vocals and skilled musicianship, typical of their style during that period. Notable songs from the album include "So Fine" and "My Music.

A truss is a unit of measurement used in the field of railroad engineering and construction. Specifically, it refers to a structure that is typically made up of triangular units, which are used to support bridges, roofs, and other architectural elements. In this context, however, it must be noted that "truss" is not a standard measurement unit like meters or feet. Instead, it describes a type of structural system or design approach.