Mott–Bethe formula 1970-01-01
The Mott-Bethe formula refers to a relationship in the field of charged particle interactions, particularly dealing with the energy loss of charged particles as they traverse a medium. The formula helps describe the average energy loss per unit distance (stopping power) of a charged particle moving through a material due to ionization and other scattering processes.
Optical lattice 1970-01-01
An optical lattice is a periodic potential created by the interference of multiple laser beams, typically used in the field of atomic, molecular, and optical (AMO) physics. The interference pattern generates a spatially periodic arrangement of light, which can trap neutral atoms or molecules at the minima or maxima of the light intensity. ### Key Features of Optical Lattices: 1. **Formation**: Optical lattices are formed by overlapping laser beams, often in a simple cubic or two-dimensional arrangement.
Photonic molecule 1970-01-01
A photonic molecule is a concept in the field of quantum optics and photonics, where the collective behavior of photons is studied in a way that mimics the properties of traditional molecules. These "molecules" do not consist of atoms in the conventional sense; instead, they are formed by the coupling of photons that are confined in systems such as photonic crystals or optical cavities.
Quadratic pseudo-Boolean optimization 1970-01-01
Quadratic pseudo-Boolean optimization refers to the optimization of a specific type of mathematical function known as a quadratic pseudo-Boolean function. These functions are special cases of polynomial functions and are defined over binary variables (typically taking values of 0 or 1).
Socolar tiling 1970-01-01
Socolar tiling refers to a type of mathematical tiling pattern that is based on a specific arrangement of tiles created by mathematician Joshua Socolar. These tilings are characterized by their ability to fill a plane with a repeating but non-periodic pattern. One well-known example of Socolar tiling is the "Socolar tiling of the plane," which can be constructed using a square tile that has a specific arrangement of colors or markings.
Solid sweep 1970-01-01
The term "solid sweep" can refer to different concepts depending on the context in which it is used. However, there are a couple of common interpretations: 1. **Sports Context**: In sports like baseball or basketball, a "solid sweep" typically refers to a team winning all games in a series or competition against another team (for example, winning all three or four games in a playoff series). A "solid sweep" would imply the victories were decisive and well-executed.
Spherical segment 1970-01-01
A spherical segment is a three-dimensional shape that is formed by slicing a sphere with two parallel planes. The portion of the sphere that lies between these two planes is referred to as a spherical segment. In more specific terms, a spherical segment has the following characteristics: 1. **Base and Height**: The spherical segment can be defined by its height (the distance between the two parallel planes) and the radius of the sphere from which it is derived.
Tiling with rectangles 1970-01-01
Tiling with rectangles is a mathematical and geometric concept that involves covering a given area or region completely with rectangles without overlaps or gaps. This is often referred to in the context of tiling a plane or a specific geometric shape (like a rectangle, square, or other polygons) using smaller rectangles. Here are a few key aspects of tiling with rectangles: 1. **Definition**: Tiling generally means that the area is subdivided into smaller pieces, which in this case are rectangles.
Quadratic growth 1970-01-01
Quadratic growth refers to a type of growth characterized by a quadratic function, which is a polynomial function of degree two. A common form of a quadratic function is given by: \[ f(x) = ax^2 + bx + c \] where: - \(a\), \(b\), and \(c\) are constants, and \(a \neq 0\). - The variable \(x\) is the input.
Kircher (crater) 1970-01-01
Kircher is a lunar impact crater located on the Moon's surface. It is situated in the northeastern part of the Mare Vaporum, a region of the Moon characterized by smooth basaltic plains. The crater is named after the German Jesuit scholar Athanasius Kircher, who was known for his work in various fields, including geology, archaeology, and linguistics.
Garth Paltridge 1970-01-01
Garth Paltridge is an Australian atmospheric scientist known for his work in climate science and his critical views on the prevailing consensus regarding climate change. He has contributed to the field through research, publications, and public commentary. Paltridge has been a vocal advocate for skepticism regarding certain climate change models and policies, and he often emphasizes the complexity of climate systems and the uncertainties that exist in climate projections. His views have sparked discussions and debates within the scientific community and among the public regarding climate change discourse.
Gavin Schmidt 1970-01-01
Gavin Schmidt is a prominent climate scientist known for his work in climate modeling and research. He is the director of the NASA Goddard Institute for Space Studies (GISS) and has contributed significantly to understanding climate change and its impacts. Schmidt is also involved in public communication about climate science, helping to bridge the gap between scientific research and public understanding. He regularly engages in discussions regarding climate policy, predictions, and the importance of addressing climate change.
Javier Martín-Torres 1970-01-01
Javier Martín-Torres is a Spanish astrophysicist and researcher known for his work in planetary science, particularly in the study of Mars and the potential for life in extraterrestrial environments. He has been involved in research related to the atmospheric conditions on Mars, the habitability of other celestial bodies, and the implications of his findings for understanding the potential for life beyond Earth.
Jean Laby 1970-01-01
Syntractrix 1970-01-01
The Kolsky models are theoretical frameworks used to describe wave propagation in materials, particularly focusing on the phenomena of attenuation and dispersion. These models stem from work done by A. Kolsky in the mid-20th century and are typically applied in material science, geophysics, and engineering disciplines. Here’s a brief overview of both the basic and modified Kolsky models: ### Kolsky Basic Model 1.
Big O notation 1970-01-01
Big O notation is a mathematical concept used to describe the performance or complexity of an algorithm in terms of time or space requirements as the input size grows. It provides a high-level understanding of how the runtime or space requirements of an algorithm scale with increasing input sizes, allowing for a general comparison between different algorithms. In Big O notation, we express the upper bound of an algorithm's growth rate, ignoring constant factors and lower-order terms.
Borel's lemma 1970-01-01
Borel's lemma is a result in the theory of functions, particularly in the context of real or complex analysis. It states the following: Let \( f \) be a function defined on an open interval \( I \subseteq \mathbb{R} \) that is infinitely differentiable (i.e., \( f \in C^\infty(I) \)). If \( f \) and all of its derivatives vanish at a point \( a \in I \) (i.e.
Contraction principle (large deviations theory) 1970-01-01
In large deviations theory, the Contraction Principle is a fundamental result that provides insights into the asymptotic behavior of probability measures associated with stochastic processes. Large deviations theory focuses on understanding the probabilities of rare events and how these probabilities behave in limit scenarios, particularly when considering independent and identically distributed (i.i.d.) random variables or other stochastic systems.
Dawson–Gärtner theorem 1970-01-01
The Dawson–Gärtner theorem is a result in the field of topology that deals with the relationship between compact spaces and their continuous images. It specifically addresses the conditions under which a continuous image of a compact space is also compact. The theorem states that if \(X\) is a compact space and \(f : X \to Y\) is a continuous function, then the image \(f(X)\) is compact in \(Y\).