The perifocal coordinate system is a framework used in orbital mechanics to describe the position and velocity of an object in orbit around a central body, such as a planet or star. In this system, the coordinates are defined relative to the orbital parameters of the body in question. Here's how the perifocal coordinate system is structured: 1. **Perifocal Plane**: The plane in which the orbit lies is called the perifocal plane.

A Hohmann transfer orbit is an elliptical orbit used to transfer a spacecraft between two circular orbits of different altitudes around a celestial body, typically a planet. This maneuver is named after the German engineer Walter Hohmann, who described it in 1925.

The mass ratio is a comparison of the mass of one substance to the mass of another substance. It is often expressed as a fraction or a ratio and is used in various fields such as chemistry, physics, and engineering to understand the relationship between different materials or components in a system.

Fakhr al-Din al-Akhlati (also known as Fakhr al-Din al-Akhlaqi or al-Akhawati) was a prominent Persian poet and philosopher from the 12th century. He is particularly known for his works that blend themes of mysticism, ethics, and philosophy. His poetry often reflects the rich cultural and intellectual milieu of the Islamic Golden Age, and he is recognized for his contributions to Persian literature and thought.

John J. Kavelaars is a Canadian astrophysicist known for his work in the fields of astronomy and astrophysics. He has made significant contributions to our understanding of various astronomical phenomena and has been involved in research related to cosmic rays, galaxy clusters, and dark matter, among other topics. Kavelaars is also associated with institutions like the National Research Council of Canada.

The Kilinailau Trench, also known as the Kilinailau Subduction Zone or Kilinailau Trough, is an underwater trench located in the South Pacific Ocean, southeast of the Solomon Islands. It is a significant geological feature formed by the subduction of tectonic plates. This trench is primarily associated with the boundary between the Indo-Australian Plate and the Pacific Plate.

Jeremy S. Heyl is an astrophysicist known for his research in various areas of astrophysics, including topics such as neutron stars, black holes, and other astronomical phenomena. He has contributed to the understanding of cosmic objects and their behaviors through theoretical modeling and analysis.

The RV Neil Armstrong is a research vessel operated by the U.S. Navy. It is named after astronaut Neil Armstrong, the first person to walk on the moon during the Apollo 11 mission. The vessel is used primarily for oceanographic research and is equipped with advanced technology for studying various marine environments, conducting scientific investigations, and supporting a range of oceanographic missions.

The RV Endeavor is a research vessel operated by the University of Rhode Island's Graduate School of Oceanography. It is used for various marine research activities, including oceanographic studies, fisheries research, and environmental monitoring. The vessel is equipped with advanced scientific instruments and technologies to support a wide range of oceanographic research initiatives.

ASCI Blue Mountain refers to a facility operated by the American Society for Testing and Materials (ASTM) in partnership with the U.S. Army Corps of Engineers, specifically the Army Engineer Research and Development Center (ERDC). The facility is located in Vicksburg, Mississippi, and focuses on advanced simulation and integration technologies for various applications, primarily in the military sector.

A Metrical Task System (MTS) is a mathematical framework used to analyze the performance of tasks that are subject to certain constraints measured over time. MTS is particularly relevant in fields such as computer science, operations research, and scheduling theory. The system typically revolves around a set of tasks, each with associated metrics that define their complexity, resource requirements, or time constraints.

CER-11, or the "Common Evaluation Framework for Substances and Mixtures," refers to a methodology or a set of guidelines for evaluating the safety and effectiveness of chemical substances and mixtures, commonly used in regulatory contexts. However, without specific context, the acronym could refer to various other topics in different fields such as engineering, environmental science, or regulatory affairs.

CSIRAC (Commonwealth Scientific and Industrial Research Organisation Automatic Computer) was one of the earliest digital computers in the world. It was developed in Australia in the late 1940s and early 1950s and is notable for being the first computer to perform a graphic display and also the first to play music. CSIRAC was built by the CSIRAC team, originally at the Australian National University in Canberra, under the leadership of Dr. Trevor Pearcey and Dr.

"Computer for operations with functions" is not a standard term but seems to refer to computational tools and techniques used to perform operations with mathematical functions. This can encompass a variety of concepts, including: 1. **Function Evaluation**: Calculating the output of a function for given inputs, which may involve numerical methods for complex functions. 2. **Function Composition**: Combining two functions to create a new function.

Usually noted D-something, L-something, e.g. L-alanine, D-glutamine.

The common ones.

The rare ones. Notably present in peptidoglycan.