Signal reflection
Signal reflection is a phenomenon that occurs in electrical transmission lines or communication channels where a portion of a signal reflects back towards the source instead of being transmitted onward. This usually happens due to an impedance mismatch between the transmission line and the load (the end device or circuit). When a signal travels along a transmission line, it travels at a certain velocity and has an associated characteristic impedance.
Earth, Planets and Space
"Earth, Planets, and Space" is often a phrase that refers to the study of celestial bodies, including our own planet Earth, as well as other planets in our solar system and beyond, and the broader universe in which they exist. This includes various scientific fields such as: 1. **Geology**: The study of Earth’s physical structure, substance, history, and processes (e.g., erosion, volcanism, plate tectonics).
Earth and Planetary Science Letters (EPSL) is a peer-reviewed scientific journal that publishes research articles and reviews in the fields of Earth sciences and planetary sciences. It covers a broad range of topics including geology, geophysics, mineralogy, geochemistry, and planetary processes related to both the Earth and other celestial bodies in the solar system. The journal is known for its interdisciplinary approach, promoting the integration of different scientific perspectives to advance the understanding of Earth and planetary systems.
The Geophysical Journal International (GJI) is a peer-reviewed scientific journal that publishes significant research in the field of geophysics. It covers a broad range of topics related to the study of Earth's physical processes and properties, including seismology, geodesy, mineral physics, geomagnetism, and other areas relevant to geophysical science. GJI aims to provide a forum for original research articles, technical notes, and review papers that contribute to the understanding of the Earth's structure and dynamics.
Geophysical Research Letters
Geophysical Research Letters (GRL) is a peer-reviewed scientific journal published by the American Geophysical Union (AGU). It focuses on short, high-impact research articles covering all areas of the geophysical sciences, including but not limited to, atmospheric sciences, oceanography, geochemistry, geology, and anything related to the Earth's physical properties and processes. The journal is known for its rapid publication process, allowing for the timely dissemination of new scientific findings.
Bonnie Ross
Bonnie Ross is a video game executive best known for her work in the gaming industry, particularly in connection with the Halo franchise. She served as the head of 343 Industries, the studio responsible for developing the Halo series, and played a significant role in shaping the direction of the franchise since it became part of Microsoft. Under her leadership, 343 Industries has produced several titles and expanded the Halo universe through various media, including novels and television adaptations.
Ungula
"Ungula" is a term that can refer to various contexts depending on the field: 1. **Biology and Zoology**: In biological terms, "ungula" is derived from Latin and refers to a hoof or a claw. It can be used to describe the hooves of ungulates, which are a group of large mammals that includes animals like horses, cows, and deer.
Wallis's conical edge
Wallis's conical edge refers to a concept in the context of the theory of conic sections and geometry, particularly as it relates to the work of the mathematician John Wallis. However, Wallis is primarily known for his contributions to calculus and the Wallis product for π. In mathematics, the term "conical edge" itself does not refer to a widely recognized concept.
Parallax
Parallax is an effect that describes the apparent shift in the position of an object when viewed from different angles or perspectives. This phenomenon occurs because our viewpoint changes, allowing us to see different aspects of an object. In astronomy, parallax is used to determine the distance of stars and other celestial objects. By observing a star from two different points in Earth's orbit around the Sun (typically six months apart), astronomers can measure the angle of apparent shift against more distant background stars.
Aconic reflector
An acconic reflector is a specific type of reflective surface designed to manipulate light and sound waves in a controlled manner. The term "acconic" derives from "accone," which refers to a shape that is curved and concave, often resembling a conic section. In optics, acconic reflectors can be used to focus light into a specific area or direct it along a particular path.
Conic constant
The conic constant, often denoted as \( k \), is a numerical value that characterizes the type of conic section represented by a quadratic equation in two variables.
Focus (optics)
In optics, "focus" refers to the point where light rays converge or diverge after passing through a lens or reflecting off a mirror. This concept is critical in various optical systems, including cameras, telescopes, microscopes, and human eyesight.
Fresnel equations
The Fresnel equations describe how light is reflected and refracted at the interface between two different media. They are derived from the wave nature of light and provide a mathematical framework for understanding how the intensity and polarization of light change when it encounters a boundary, such as the surface of a prism, water, or glass.
Hamiltonian optics
Hamiltonian optics is a framework for understanding the behavior of light and optical systems using principles derived from Hamiltonian mechanics, a reformulation of classical mechanics. This approach utilizes the mathematical structure and concepts of Hamiltonian systems to analyze optical phenomena, drawing parallels between the evolution of light rays and the motion of particles in classical mechanics. In Hamiltonian optics, light rays are treated as trajectories in a phase space, with the Hamiltonian function representing the energy of the optical system.
K-Mirror (Optics)
K-mirror optics is a specific configuration used in optical systems, primarily in the design of telescopes and other imaging instruments. The term "K-mirror" typically refers to a type of optical scheme that employs multiple mirrors to achieve specific imaging or focusing properties. A K-mirror system generally consists of two mirrors arranged in a way that allows light to be reflected and focused in a desired manner.
Light beam
A light beam is a stream of light particles, or photons, that travel in a specific direction. This phenomenon is often described in terms of optics and physics. Light beams can vary widely in terms of their intensity, wavelength (color), and coherence. Here are a few key characteristics of light beams: 1. **Directionality**: A light beam typically travels in a straight line. This is particularly true in a vacuum or in a homogeneous medium where there are no obstacles.
METATOY
"METATOY" may refer to a few different concepts depending on the context, but as of my last knowledge update in October 2021, there isn't a widely recognized term or brand specifically named "METATOY." It’s possible that it could refer to a concept in gaming, design, technology, or other fields.
Malus-Dupin theorem
The Malus-Dupin theorem, also known simply as Malus's law, is a principle in optics that describes the intensity of polarized light as it passes through a polarizing filter. It states that the intensity of light transmitted through a polarizer is proportional to the square of the cosine of the angle between the light's initial polarization direction and the axis of the polarizer.
The timeline of strategic nuclear weapon systems of the United Kingdom outlines key developments and milestones in the UK's nuclear deterrent capabilities from the post-World War II period to the present. Here’s a brief overview: ### 1940s - **1945**: The United Kingdom develops its interest in nuclear weapons following the Manhattan Project, later conducting its own research.
Rebecca Heineman
Rebecca Heineman is a notable figure in the video game industry, recognized for her work as a game designer, programmer, and producer. She was one of the first female video game developers and has made significant contributions to the field since the early days of gaming. Her career began in the 1980s, and she is best known for her work on classic games, particularly in the adventure and role-playing game genres.