"Eternal September" is a term used to describe the phenomenon that began in September 1993, when the Internet experienced a significant influx of new users due to the commercialization of the web and the introduction of service providers like AOL, which made internet access more widely available. Before this time, September was traditionally a month when college students would start using the Internet, causing the user base to fluctuate.

PSINet was one of the first commercial Internet service providers (ISPs) in the United States. Founded in 1989 by William von Meister and his team, PSINet was notable for providing businesses and individuals with dial-up access to the Internet. The company played a significant role in helping to popularize Internet access and services during the early days of the web. PSINet was particularly known for its commitment to maintaining a robust and reliable network.

Spectral sequences are a powerful mathematical tool used primarily in algebraic topology, homological algebra, and algebraic geometry. They provide a systematic method for computing homology groups, cohomology groups, or other related invariants of topological spaces or algebraic objects. ### Definition and Construction A spectral sequence consists of a sequence of pages (or terms), each represented as a collection of abelian groups or modules, along with differentials that relate these groups across the pages.

Bill Moog is a well-known figure in the realm of synthesizers and electronic music, particularly for his work in the development of the Moog synthesizer. He is often associated with the company Moog Music, which was founded by his father, Robert Moog, a pioneer in the field of synthesizers. The Moog synthesizer played a significant role in shaping the sound of electronic music starting in the 1960s and continues to influence musicians and composers today.

Tommy Gate is a brand name known for its hydraulic lifts, specifically designed for the easy loading and unloading of cargo from various vehicles. The lifts are commonly installed on trucks, vans, and service vehicles to facilitate the movement of goods, making it easier for operators to handle heavy items without the risk of injury. The product line includes different types and sizes of lifts, catering to various industries such as transportation, construction, and delivery services.

Partial geometry is a concept in the field of finite geometry, which is a branch of mathematics that studies geometric structures that are defined over finite sets. In particular, partial geometries can be understood as a generalization of projective planes and other geometric configurations. In a partial geometry, the points and lines are organized in such a way that each line is associated with a certain number of points, and each point is associated with a certain number of lines.

Topological geometry is a branch of mathematics that combines elements of topology and geometry to study the properties and structures of space that are preserved under continuous transformations. In topology, the primary focus is on properties that remain invariant even when objects are stretched or deformed, such as connectedness and compactness. Geometry, on the other hand, involves the study of properties related to distances, angles, and shapes.

The equation \( xy = yx \) describes a relationship between the variables \( x \) and \( y \). It essentially states that the product of \( x \) and \( y \) is equal to the product of \( y \) and \( x \). This equation holds true for any real numbers \( x \) and \( y \) due to the commutative property of multiplication, which states that the order of multiplication does not affect the result.

A logical hexagon often refers to a concept used in various fields such as logic, mathematics, and philosophy. However, it's possible that you might be referring to a specific context or framework, as "logical hexagon" is not a widely recognized term across all domains. In a more general sense, a hexagon is a six-sided polygon, and the term "logical" can imply structured reasoning or relationships among the elements involved.

A **paratopological group** is a mathematical structure that combines the concepts of group theory and topology, but with a relaxed condition on the topology. Specifically, a paratopological group is a set equipped with a group operation that is continuous in a weaker sense than standard topological groups.

An Information Diagram is a visual representation used to depict information, relationships, or concepts in a structured way. These diagrams can take many forms, including Venn diagrams, flowcharts, organizational charts, and mind maps, each serving different purposes based on the type of information being conveyed. 1. **Venn Diagrams**: Used to show the relationships between different sets, illustrating shared and distinct elements.

Interaction information is a concept used in information theory that quantifies the amount of information that is gained about a system when considering the joint distribution of multiple random variables, compared to when the variables are considered independently. It often addresses the interactions or dependencies among variables. In more technical terms, interaction information can be defined as a measure of how much more information about the joint distribution of two or more random variables can be obtained by knowing the values of the variables compared to knowing them independently.

"Khimera" can refer to different things depending on the context. Here are a few possibilities: 1. **Mythology**: In Greek mythology, the Chimera (often spelled Khimera) is a monstrous creature that is usually depicted as a fire-breathing hybrid of a lion, goat, and serpent.

In remote sensing, "collocation" refers to the process of aligning and combining data from different sources or datasets based on their spatial and temporal characteristics. This is often necessary to create a comprehensive picture of a particular area or phenomenon by integrating information from various sensors, platforms, and timeframes. Collocation typically involves: 1. **Spatial Alignment**: Ensuring that data from different sensors or sources align with each other geographically. This might involve correcting for differences in projection, scale, or resolution.

Sulfur has several isotopes, which are variants of the sulfur atom that have the same number of protons but different numbers of neutrons. The most common isotopes of sulfur are: 1. **Sulfur-32 (²³²S)**: This is the most abundant isotope, accounting for about 95% of naturally occurring sulfur. It has 16 protons and 16 neutrons.

Hyperloop UPV is a project developed by the Polytechnic University of Valencia (Universitat Politècnica de València) in Spain. It is part of the broader Hyperloop concept introduced by Elon Musk, which envisions a high-speed transportation system using pods that travel through low-pressure tubes. The goal of Hyperloop UPV is to design and build a prototype that can demonstrate the feasibility and effectiveness of this transportation mode.

Emilio Zavattini is a name that does not seem to correspond to a widely recognized individual or entity in global culture, history, or academia based on data up to October 2023. It is possible that the name refers to a lesser-known person, a specific local figure, or that it may have emerged after my last update.

Jared Diamond is an American scientist, author, and professor known for his interdisciplinary work in fields such as geography, biology, anthropology, and evolutionary theory. He is best known for several popular science books, including "Guns, Germs, and Steel," which explores the factors that have shaped human societies and civilizations. In this book, Diamond argues that geographical and environmental factors have played a critical role in determining the development of different societies, rather than inherent differences in intelligence or capability among people.

A residuated lattice is a specific type of algebraic structure that arises in the study of lattice theory, as well as in the analysis of certain types of ordered sets and algebraic systems. It combines the properties of a lattice with additional operations that allow for the definition of residuals. Here are the key features that characterize a residuated lattice: 1. **Lattice Structure**: A residuated lattice is first and foremost a lattice.

Teletext is a information service that provides text-based information and data transmitted over television signals. It was originally designed to provide news, weather updates, sports scores, and other public information directly to television screens without the need for a separate device. Developed in the 1970s and widely used in the 1980s and 1990s, teletext relies on a broadcast transmission system.