Networking

Network may refer to:

A network, in the context of electronics, is a collection of interconnected components. Network analysis is the process of finding the voltages across, and the currents through, every component in the network. There are a number of different techniques for achieving this. However, for the most part, they assume that the components of the network are all linear. The methods described in this article are only applicable to linear network analysis except where explicitly stated.

Definitions

Component A device with two or more terminals into which, or out of which, charge may flow.
Node A point at which terminals of more than two components are joined. A conductor with a substantially zero resistance is considered to be a node for the purpose of analysis.
Branch The component(s) joining two nodes.
Mesh A group of branches within a network joined so as to form a complete loop.
Port Two terminals where the current into one is identical to the current out of the other.
Circuit A current from one terminal of a generator, through load component(s) and back into the other terminal. A circuit is, in this sense, a one-port network and is a trivial case to analyse. If there is any connection to any other circuits then a non-trivial network has been formed and at least two ports must exist.
Transfer function The relationship of the currents and/or voltages between two ports. Most often, an input port and an output port are discussed and the transfer function is described as gain or attenuation.
Component transfer function For a two-terminal component (i.e. one-port component), the current and voltage are taken as the input and output and the transfer function will have units of impedance or admittance (it is usually a matter of arbitrary convenience whether voltage or current is considered the input). A three (or more) terminal component effectively has two (or more) ports and the transfer function cannot be expressed as a single impedance. The usual approach is to express the transfer function as a matrix of parameters. These parameters can be impedances, but there is a large number of other approaches, see two-port network.

References

  1. Nilsson, J W, Riedel, S A, Electric Circuits, pp 112-113, Pearson Prentice Hall, 2007
  2. Nilsson, J W, Riedel, S A, Electric Circuits, p94, Pearson Prentice Hall, 2007

A network diagram

A network diagram is a general type of diagram, which represents some kind of network. A network in general is an interconnected group or system, or a fabric or structure of fibrous elements attached to each other at regular intervals, or formally: a graph.

A network diagrams is a special kind of cluster diagram, which even more general represents any cluster or small group or bunch of something, structured or not. Both the flow diagram and the tree diagram can be seen as a specific type of network diagram.

 

References

  1. Sunny Baker, G. Michael Campbell, Kim Baker (2003). The Complete Idiot's Guide to Project Management. pp. 104. ISBN 0028639200. 
  2. Jonh F.Sowa (1987). "Semantic Networks". in Stuart C Shapiro. Encyclopedia of Artificial Intelligence. http://www.jfsowa.com/pubs/semnet.htm. Retrieved on 2008-04-29. 
  3. Committee on Network Science for Future Army Applications, National Research Council (2005). Network Science. National Academies Press. ISBN 0309100267. http://www.nap.edu/catalog.php?record_id=11516. 
  4. Groth, David; Toby Skandier (2005). Network+ Study Guide, Fourth Edition. Sybex, Inc.. ISBN 0-7821-4406-3. 

 

In graph theory

In graph theory, a network is a digraph with weighted edges. These networks have become an especially useful concept in analysing the interaction between biology and mathematics. Using networks of all types; various applications based on the creativity of the mathematician along with their environment can be evaluated in all sorts of manners. Some may visualize networks in various contexts to feel the network which the nodes belong; creating an environment for the nodes to belong is essential to the mathematical evaluation and furthermore the mathemation belonging to the environment, just as the networks nodes.

Use of many space models to create the complexity of the environment is useful when analysing networks. Some examples could be linear, Cartesian, three dimensional, n-dimensional, along with models of expanding and contracting environments, furthermore with the growth or decay of the beings in the network, allow for the various types of situations to be modelled to the specifications of the problem.

A network displaying the Road coloring problem

References

 

The network model7

The network model is a database model conceived as a flexible way of representing objects and their relationships.
Example of a Network Model.

The network model original inventor was Charles Bachman, and it was developed into a standard specification published in 1969 by the CODASYL Consortium.

Network theory

Network theory is an area of applied mathematics and part of graph theory. It has application in many disciplines including particle physics, computer science, biology, economics, operations research, and sociology. Network theory concerns itself with the study of graphs as a representation of either symmetric relations or, more generally, of asymmetric relations between discrete objects. Examples of which include logistical networks, the World Wide Web, gene regulatory networks, metabolic networks, social networks, epistemological networks, etc. See list of network theory topics for more examples.

See also

Notes and references

  1. Wasserman, Stanley and Katherine Faust. 1994. Social Network Analysis: Methods and Applications. Cambridge: Cambridge University Press.
  2. Newman, M., Barabási, A.-L., Watts, D.J. [eds.] (2006) The Structure and Dynamics of Networks. Princeton, N.J.: Princeton University Press.