90 mm artillery typically refers to a category of ammunition and artillery systems that use a 90 mm caliber. This size of artillery has been employed in various types of weapons, including towed howitzers, anti-tank guns, and medium mortars. One notable example is the 90 mm gun used by some militaries during the mid-20th century, such as the United States and several other NATO and non-NATO countries.

The 94th meridian west is a line of longitude that is 94 degrees west of the Prime Meridian, which is the line of longitude at 0 degrees. This meridian runs from the North Pole to the South Pole and passes through several U.S. states, including parts of Minnesota, Wisconsin, Iowa, Missouri, Kansas, Oklahoma, and Texas. It also passes through various geographical features and regions, influencing local time zones and climate patterns.

In the 9th century, notable mathematicians emerged from various cultural and geographical backgrounds, particularly within the Islamic world and Europe. Here's a brief overview by nationality or region: ### Islamic World 1. **Al-Khwarizmi** (Persian) - Often hailed as the "father of algebra," Al-Khwarizmi's works were foundational in developing algebra and introducing the decimal positional number system to the West.

The A. A. Griffith Medal and Prize is an award given by the Institute of Materials, Minerals and Mining (IOM3) in the UK. It is named after the eminent scientist A. A. Griffith, who made significant contributions to the fields of materials science and engineering, particularly in the areas of fracture mechanics and the study of materials' properties.

Abba Mari ben Eligdor was a notable Jewish figure in the medieval period, specifically during the 13th century. He is best known for his contributions to Jewish scholarship and literature. One of his most significant works is the "Sefer ha-Mitzvot," which is a systematic enumeration of the commandments in Jewish law.

The Abbe sine condition is a principle in optical systems, particularly in the design of optical instruments like microscopes and imaging systems. It relates to the alignment of optical components and the criteria for achieving satisfactory resolution and imaging performance.

Charlier polynomials are a sequence of orthogonal polynomials that arise in probability and analysis. They are a specific case of hypergeometric polynomials and can be defined in the context of the Poisson distribution. The Charlier polynomials \( C_n(x; a) \) are defined as follows: \[ C_n(x; a) = \sum_{k=0}^{n} \frac{(-1)^{n-k}}{(n-k)!

Abortion initiation refers to the process where a pregnancy is intentionally terminated, and "abortive initiation" specifically pertains to the methods and practices used to begin this process. There are several approaches to abortion, including: 1. **Medical Abortion**: Involves the use of medications to induce an abortion. This typically includes a combination of mifepristone (which blocks the hormone progesterone) and misoprostol (which causes the uterus to contract and expel its contents).

Abrasive blasting, also known as sandblasting or media blasting, is a surface treatment process used to clean, finish, or prepare surfaces by propelling abrasive materials at high velocities. This technique is commonly employed in various industries for applications such as removing paint, rust, or corrosion from metals, cleaning surfaces before painting or coating, and creating textured finishes.

Abrasive Flow Machining (AFM) is a precision machining process used to improve the surface finish and shape of part features that can be difficult to reach using traditional machining methods. It utilizes a flowable abrasive medium—often a viscous polymer or a viscoplastic material mixed with abrasive particles—that is forced through or across the workpiece.

ISO 31-7 is part of the ISO 31 series of international standards that deal with physical quantities and units. Specifically, ISO 31-7 addresses the topic of "Specific quantities and units" related to the field of mechanics. It lists various mechanical quantities and their corresponding units, providing a standardized framework for measurements and ensuring consistency in scientific communication.

An **abundant number** is a positive integer for which the sum of its proper divisors (the positive divisors excluding the number itself) is greater than the number itself.

Plücker embedding is a mathematical construction that embeds a projective space into a higher-dimensional projective space. Specifically, it is most commonly associated with the embedding of the projective space \( \mathbb{P}^n \) into \( \mathbb{P}^{\binom{n+1}{2} - 1} \) using the concept of the lines in \( \mathbb{P}^n \).

"Acid Eaters" is a term that can refer to various things, but it is most commonly associated with music, particularly with the punk and alternative rock scenes. It is notably the title of an album by the punk band *The Misfits*, released in 1994. The album consists of covers of songs by other artists, showcasing a range of influences from different genres, including punk, pop, and rock.

Motorcycling involves riding a motorcycle, which is a two-wheeled motor vehicle. It combines transportation, recreational activity, and often a sense of freedom and adventure. Motorcycling can occur on public roads, racetracks, or off-road trails. Key aspects of motorcycling include: 1. **Types of Motorcycles**: There are various types of motorcycles designed for different purposes, such as cruiser bikes, sport bikes, touring bikes, dirt bikes, and enduro bikes, among others.

Gerrit Hiemstra is a well-known Dutch meteorologist and weather presenter. He is particularly recognized for his work in broadcasting weather forecasts on Dutch television, where he provides insights into weather patterns and climatic conditions. Hiemstra is often involved in discussions surrounding climate change and meteorology in general, leveraging his expertise to educate the public about weather and environmental issues.

The term "confronted animals" doesn't refer to a widely recognized concept in biology or animal behavior as of my last update. However, it could imply situations where animals encounter each other in a way that leads to direct interactions, which may include aggression, territorial disputes, mating behaviors, or other social interactions. In a broader context, it might refer to scenarios where animals are faced with challenges or threats, whether from other animals, humans, or environmental factors.

In the context of sheaf theory in mathematics, a **constant sheaf** is a particular type of sheaf that assigns the same set (or space) to every open set of a topological space, while also encoding the necessary gluing and restriction properties of sheaves.

Container terminals are specialized facilities at ports designated for the handling and storage of shipping containers. These terminals are crucial components of international trade and logistics, enabling the efficient transfer of containers between ships, trucks, and trains. Here are some of the key features and functions of container terminals: 1. **Loading and Unloading**: Container terminals have equipment such as gantry cranes and reach stackers that facilitate the loading and unloading of containers from ships to docking stations and vice versa.

Gheorghe Păun is a Romanian computer scientist known for his significant contributions to the fields of theoretical computer science and formal languages. He is particularly recognized for his work on the theory of P systems, which are a model of computation inspired by the functioning of biological cells. Păun introduced this model in the early 2000s, and it has since become an area of active research, exploring the potential of using such systems for computing and problem-solving.