The term "covering cherub" typically refers to a specific type of angelic being mentioned in religious texts, particularly within Judeo-Christian traditions. In the Hebrew Bible, particularly in the Book of Ezekiel, "covering cherub" describes a celestial being that is said to have a protective role.

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.

Absolute electrode potential refers to the potential difference between an electrode and a reference point in a solution, often associated with the ability of an electrode to gain or lose electrons in electrochemical reactions. It is expressed in volts (V) and is used to quantify the driving force behind electrochemical processes.

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.

Absolute rotation refers to the rotation of an object in reference to a fixed point or frame of reference, rather than to another moving object. This concept can be applied in various fields including physics, engineering, and computer graphics. In physics, absolute rotation may refer to the orientation of an object in space with respect to a set of fixed axes, which are typically considered as not changing over time.

Can you just imagine what if luminiferous aether was one single fixed rigid body? This is apparently what Maxwell believed, Subtle is the Lord by Abraham Pais (1982) page 111 quoting his entry to Encyclopedia Britannica:Then it would provide a natural space coordinate for the entire universe!

Apparently Einstein was the first to completely say: let's just screw this aether thing completely then, it's getting too complicated, and we don't really need it. As Wikipedia puts it well, in very unencyclopedic tone^[ref]: Aether fell to Occam's razor.

AbsoluteTelnet is a terminal emulation software application designed for Windows operating systems. It allows users to connect to various types of network devices and servers using protocols such as Telnet, SSH (Secure Shell), and more. The software provides an interface for users to interact with remote systems, making it easier to manage servers, routers, switches, and other network devices from a distance.

The Dirac equation is a fundamental equation in quantum mechanics and quantum field theory that describes the behavior of fermions, such as electrons and quarks, that have spin-½. It was formulated by the British physicist Paul Dirac in 1928 as a way to reconcile the principles of quantum mechanics with special relativity. The equation incorporates both the wave-like nature of matter and the relativistic effects of high velocities.

An abstract differential equation is a mathematical equation that describes the relationship between a function and its derivatives but is expressed in a more generalized, often functional setting rather than in the traditional form of ordinary or partial differential equations. Abstract differential equations typically arise in contexts such as functional analysis, where the functions involved may take values in infinite-dimensional spaces, such as Banach or Hilbert spaces.

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 \( \mathbb{P}^n \).

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.

The Abuse Reporting Format (ARF) is a structured format used primarily for reporting email abuse, such as spam, phishing, or other malicious activities. The goal of ARF is to provide a standardized way for organizations and individuals to report and share information about abuse instances to relevant parties, such as ISPs, email service providers, or law enforcement.

The academic staff at the Norwegian University of Science and Technology (NTNU) consists of faculty members engaged in teaching, research, and various academic activities in a wide range of disciplines. This includes professors, associate professors, assistant professors, lecturers, and researchers across different faculties such as engineering, natural sciences, humanities, social sciences, medicine, and architecture.

A villanelle is a specific form of poetry that consists of 19 lines, organized into five tercets (three-line stanzas) followed by a quatrain (four-line stanza). The structure is characterized by its strict rhyme scheme and repetition of certain lines. The rhyme scheme is typically ABA for the tercets and ABAA for the quatrain.

Yves Quéré is a prominent French physicist known for his contributions to the fields of complex systems, nonlinear dynamics, and the study of fundamental physical processes. He has been involved in various research areas, including fluid mechanics and the behavior of complex networks. Quéré has also published numerous papers and articles in scientific journals.

The Fundamental Theorem of Asset Pricing is a key concept in financial mathematics and economics that establishes a connection between the pricing of financial assets and the existence of arbitrage opportunities in a market. It essentially provides the theoretical foundation for understanding how assets should be priced in a no-arbitrage market. The theorem can be summarized in a few main points: 1. **No Arbitrage Condition**: The first part of the theorem states that if there are no arbitrage opportunities in a market (i.e.

ACARS stands for Aircraft Communications Addressing and Reporting System. It is a digital datalink system used in aviation to facilitate communication between aircraft and ground stations. ACARS allows for the transmission of a variety of messages, including flight information, weather updates, and maintenance data. The system uses a combination of VHF radio, satellite communication, and sometimes HF radio, to send and receive messages.

The Lathen train collision was a tragic railway accident that occurred on June 22, 2008, near the town of Lathen in Germany. The collision involved a passenger train and a freight train, resulting in significant casualties. In the incident, a regional passenger train collided with a freight train that was allegedly on the wrong track due to a signaling error. The collision led to the derailment of several train cars and caused multiple injuries and fatalities.