Node
Encyclopedia
In general, a node is a localised swelling (a "knot
") or a point of intersection (a vertex
).
Node may refer to:
In mathematics:
In computing and electronics:
In science:
Other uses
Knot
A knot is a method of fastening or securing linear material such as rope by tying or interweaving. It may consist of a length of one or several segments of rope, string, webbing, twine, strap, or even chain interwoven such that the line can bind to itself or to some other object—the "load"...
") or a point of intersection (a vertex
Vertex (graph theory)
In graph theory, a vertex or node is the fundamental unit out of which graphs are formed: an undirected graph consists of a set of vertices and a set of edges , while a directed graph consists of a set of vertices and a set of arcs...
).
Node may refer to:
In mathematics:
- Node (autonomous system)Node (autonomous system)The behaviour of a linear autonomous system around a critical point is a node if the following conditions are satisfied:Each path converges to the critical point as t \rightarrow \infty . Furthermore, each path approaches the point asymptotically through a line....
, behaviour for an ordinary differential equation near a critical point - Node (graph theory), a vertex in a mathematical graph
- A type of singular point of a curveSingular point of a curveIn geometry, a singular point on a curve is one where the curve is not given by a smooth embedding of a parameter. The precise definition of a singular point depends on the type of curve being studied.-Algebraic curves in the plane:...
.
In computing and electronics:
- Node (circuits)Node (circuits)In electrical engineering, node refers to any point on a circuit where two or more circuit elements meet. For two nodes to be different, their voltages must be different. Without any further knowledge, it is easy to establish how to find a node by using Ohm's Law: V=IR. When looking at circuit...
, a region in an electrical circuit where there is no change in potential - Node (computer science)Node (computer science)A node is a record consisting of one or more fields that are links to other nodes, and a data field. The link and data fields are often implemented by pointers or references although it is also quite common for the data to be embedded directly in the node. Nodes are used to build linked, often...
, the computer representation of a node in a graph, and a basic unit used to build data structures such as linked lists and trees - Node (networking)Node (networking)In communication networks, a node is a connection point, either a redistribution point or a communication endpoint . The definition of a node depends on the network and protocol layer referred to...
, an active device attached to a computer network or other telecommunications network, such as a computer or a switch, or a point in a network topology at which lines intersect or branch - Node (UML)Node (UML)A node In the Unified Modeling Language is a computational resource upon which UML artifacts may be deployed for execution.There are two types of nodes: device nodes and execution environments....
, the representation of a computational device in the Unified Modeling Language - Node.jsNode.jsNode.js is a software system designed for writing highly-scalable internet applications, notably web servers.Programs are written in JavaScript, using event-driven, asynchronous I/O to minimize overhead and maximize scalability....
, a javascript-based programming framework
In science:
- Biology
- Primitive node is the organizer tissue for gastrulation in vertebrates.
- Node (botany), the place on a plant stem where a leaf is attached
- In CladisticsCladisticsCladistics is a method of classifying species of organisms into groups called clades, which consist of an ancestor organism and all its descendants . For example, birds, dinosaurs, crocodiles, and all descendants of their most recent common ancestor form a clade...
, a shared ancestor (also see CladeCladeA clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...
)
- Orbital nodeOrbital nodeAn orbital node is one of the two points where an orbit crosses a plane of reference to which it is inclined. An orbit which is contained in the plane of reference has no nodes.-Planes of reference:...
, the points where an orbit crosses a plane of reference (often divided into ascending and descending)- Lunar nodeLunar nodeThe lunar nodes are the orbital nodes of the Moon, that is, the points where the orbit of the Moon crosses the ecliptic . The ascending node is where the moon crosses to the north of the ecliptic...
, where the orbits of the sun and moon intersect - Longitude of the node, how orbital nodes are parameterised
- Lunar node
Other uses
- Node (physics)Node (physics)A node is a point along a standing wave where the wave has minimal amplitude. For instance, in a vibrating guitar string, the ends of the string are nodes. By changing the position of the end node through frets, the guitarist changes the effective length of the vibrating string and thereby the...
, a point along a standing wave where the wave has minimal amplitude - Node, a stop in a transportation system
- Node MagazineNode MagazineNode Magazine is a literary project in the guise of a fictional magazine created to annotate the novel Spook Country by William Gibson.The project is essentially a hypertext version of the novel...
, a literary project based on the novel Spook Country by William Gibson - Node, a cyborg with a donated human face that is used as a guide in the universe's largest library, in "Silence in the Library" (Doctor Who)