Unreferenced date September 2007 commons category Engines by cylinder layout Engineconfiguration is an engineering term for the layout of the major components of a reciprocating engine reciprocating piston internal combustion engine . These components are the cylinder engine cylinder s and crankshaft ... are historic, arbitrary, or overlapping. For example, the flat engine 180 V engine is so named because the crankshaft is related to a V engine more closely than it is related to other opposed piston engine s such as the boxer. Others would consider it a flat engine because of its shape. The names W engine and rotary engine disambiguation rotary engine have each been used for several unconnected designs. The Flat 4 H 4 and Flat 6 H 6 engines produced by Subaru are not H engine s at all, but boxer engine s. Categorisation by piston motion Image Types of engines Boxer vs Inline vs V.jpg thumb 300px right Engine types include Single cylinder engine s Inline engine aviation Inline engine designs Straight engine , with all of the cylinders placed in a single row U engine , two separate straight engines with crankshafts linked by a central gear. The square four is a U engine where the two straight engines have two cylinders each. V engine , with two banks of cylinders at an angle, most commonly 60 or 90 degrees. Flat engine , two banks of cylinders directly opposite each other on either side of the crankshaft. H engine , two crankshafts. W engine . Combination of V and straight, giving 3 banks, or two V s intertwined giving 4 banks. Opposed piston engine , with multiple crankshafts, an example being Delta engine s, with three banks of cylinders and three crankshafts X engine . Radial engine Radial designs, including most Rotary engine designs. Mostly seen on pre Second World War WWII aircraft. Pistonless rotary engine s, notably Wankel engine . The standard names for some configurations ... engine 180 V engine do not in any way form a V, but it is regarded as a V engine because of its ... more details
Wiktionary configure configuration The term configuration has several meanings. In computing it may refer to Computer configuration or system configuration Configure computing is the output of Autotools and used to detect system configuration. This is referred to as . configure in Unix Configuration file is a software file used to configure the initial settings for a computer program Other usages include Electron configurationConfiguration geometry Configuration space Molecular configurationConfiguration management is a management discipline Configuration locomotive parts In Historical Behaviour Studies , configuration is a pattern of historical behaviour See also CONFIG.SYS , the primary configuration file for the MS DOS and OS 2 operating systems. Knowledge based Configuration , intelligent techniques for complex products and services. disambiguation cs Konfigurace de Konfiguration es Configuraci n fr Configuration lt Konfig racija nl Configuratie ja nn Konfigurasjon pt Configura o ru ... more details
computer scientist Mark Burgess ref M. Burgess, Cfengine a site configurationengine, USENIX Computing ...Image ConfiurationActivityModel.png right thumb 400px Top level Configuration Management Activity model Configuration management CM is a process for establishing and maintaining consistency of a product ...?ident number 202239 title MIL HDBK 61A, Military Handbook Configuration Management Guidance publisher ... ANSI EIA 649 A Standard NATIONAL CONSENSUS STANDARD FOR CONFIGURATION MANAGEMENT title ANSI EIA 649B, National Consensus Standard for Configuration Management publisher TechAmerica date 01 ... 2007 09 22 ref ref cite web title Configuration Management and the Federal Transportation Administration ... FOR CONFIGURATION MANAGEMENT title ANSI EIA 649B, National Consensus Standard for Configuration Management ... of items and systems reflects their true configuration. A complete CM program includes provisions for the storing ... CM. History of CM Configuration Management CM as a formal management approach was developed by the United ... config management.pdf title Configuration Management Compliance Validation Critical Review and Technology ... alone discipline. Overview of configuration management CM is the practice of handling changes systematically ... lifecycle . The CM process for both hardware and software configuration items comprises five distinct ... baselining processes Configuration control and Configuration status accounting Naming conventions Audits and Reviews and Subcontractor Vendor CM requirements. Configuration Identification CI ... and Status Accounting CSA of a system and its configuration items CIs throughout their lifecycle development, production, deployment, and operational support until disposal. Configuration Control ..., firmware, software, and documentation. Configuration Status Accounting Includes the process of recording and reporting configuration item descriptions e.g., hardware, software, firmware, etc. and all ... of baseline configuration and approved modifications can be quickly determined. Configuration ... more details
The term configuration item or CI refers to the fundamental structural unit of a configuration management .... The Configuration management system oversees the life of the CIs through a combination of process and tools ... related to lack of testing as well as incompatibilities with other CIs. Role in configuration management The term configuration item can be applied to anything designated for the application of the elements of configuration management and treated as a single entity in the configuration management system. The entity must be uniquely identified so that it can be distinguished from all other configuration ... of the change. Altering a specific baseline configuration management baseline version of a configuration item creates a new version of the same configuration item, itself a baseline. In examining the effect of a change, two of the questions that must be asked are What configuration items are affected? How have the configuration items been affected? Its use within a product can be traced in a robust .... A Software release release itself a versioned entity may consist of several configuration items. The set of changes to each configuration item will appear in the release notes , and the notes may contain specific headings for each configuration item. A complex hardware configuration item may have many levels of configuration items beneath its top level each configuration item level must meet the same fundamental elements of the configuration management system. In addition to its purpose in the implementation and management of a change, each configuration item s listing and definition should act ... can agree to a common definition when they use the name of the configuration item. Selection and identification of configuration items for a particular project can be seen as the first step in developing an overall architecture See also architecture of the product from the top down. Configuration items, their versions, and their changes form the basis of any configuration audit . References ... more details
vehicle craft with a pusher configuration the propeller s are mounted behind their respective engine s . According to Bill Gunston , a pusher propeller is one mounted behind engine so that drive shaft ... on the pusher propellers. ref Engine cooling and exhaust In pusher configuration, the propeller ... is no longer as common as it once was. Engine location in the pusher configuration might endanger ... Press 2004, ISBN 978 0 521 84140 5 ISBN 0 521 84140 2 ref Pusher configuration describes also more commonly the specific layout of a fixed wing aircraft of which the thrust device has a pusher configuration. Pusher configuration describes this specific propeller or ducted fan thrust device attached ... Farman pusher had the propeller mounted just behind the main lifting surface with the engine ... to an otherwise similar Tractor configuration tractor type . The U.S. Army banned pusher aircraft in late ... adoption of synchronisation gears by all the combatants in 1916 17, the tractor configuration ... fighter to use the Farman pusher configuration was the 1931 Vickers Type 161 COW gun fighter. During the long eclipse of the configuration the use of pusher propellers continued in aircraft which .... The so called push pull configuration push pull layout , combining the tractor and pusher configurations ... of an outboard engine failing, such as on the Farman F.222 but at the cost of a severely reduced efficiency .... Image rutan.long EZ.g wily.arp.jpg thumb left Rutan Long EZ pusher configuration home built ... seats was per force designed for this aircraft which later re emerged Saab 21R with a jet engine ... Wasp Major radial engine s mounted in the wing, each driving a pusher propeller located behind ... to be tractor configuration, there has been in recent years something of a revival of interest ..., and autogyros. The configuration is also often used for unmanned aerial vehicle s, due to requirements for a front fuselage free of any engine interference. Engine installation considerations ... more details
In information systems communications or computer system s, a configuration is an arrangement of functional unit s according to their nature, number, and chief characteristics. Often, configuration pertains to the choice of hardware, software, firmware, and documentation. The configuration affects system function and performance. See also Autoconfiguration Configuration file In software, a data resource used for program initialization Configuration management In multiple disciplines, a practice for managing change Configure script computing References Federal Standard 1037C External links http alumnit.ca wiki index.php?page UniConf UniConf Category Computer configuration computer stub de Konfiguration Computer fa fr Configuration informatique it Configurazione lt Konfig racija informatika ms Tatarajah komputer ru ... more details
Unreferenced date December 2009 Auto configuration is the automatic computer configurationconfiguration of devices without manual intervention, without any need for software configuration programs or jumper computing jumper s. Ideally, auto configuring devices should just plug and play . Autoconfiguration has been made common because of the low cost of microprocessor s and other embedded controller devices. Configurations may be stored in NVRAM , loaded by a host processor, or negotiated at system initialization time. In some cases, hot swap hot pluggable devices may be able to renegotiate their configuration. Example of auto configuring devices Universal Serial Bus USB Example of auto configuring devices and protocols Dynamic Host Configuration Protocol DHCP Zeroconf See also Universal Plug and Play FPGA AutoConfig Amiga DEFAULTSORT Auto Configuration Category Computer peripherals Category Computer configuration ru tr Otomatik yap land rma ... more details
Unreferenced auto yes date December 2009 Orphan date December 2009 Clean configuration is the flight configuration of a fixed wing aircraft when its external equipment is retracted to minimize drag and thus maximize airspeed for a given power setting. For most airplane s, clean configuration means simply that the wing Flap aircraft flaps and landing gear are retracted as these are the cause of drag due to the lack of Aerodynamic streamlined shape . On more complex airplanes, it also means that other devices on the wings such as slats, spoilers, and leading edge flaps are retracted. Clean configuration is used for normal cruising at altitude during which lift, or rise in altitude, is not needed. DEFAULTSORT Clean Configuration Category Aerospace engineering Aviation stub ... more details
Image Mutually inscribed pentagons.svg thumb The Desargues configuration viewed as a pair of mutually .... In geometry , the Desargues configuration is a Configuration geometry configuration of ten points ... , and closely related to Desargues theorem , which proves the existence of the configuration ... form an instance of the Desargues configuration. Symmetries Although Desargues theorem chooses different roles for these ten lines and points, the Desargues configuration itself is more symmetry symmetric .... The Desargues configuration has a symmetry group of order 120 that is, there are 120 different ways of permuting the points and lines of the configuration in a way that preserves its point line incidences. One way of constructing the same configuration in a way that makes these symmetries more ... configuration as the set of ten points where three planes meet and the set of ten lines where two planes ... of the configuration. The Desargues configuration is self dual, meaning that it is possible to find a correspondence from points of one Desargues configuration to lines of a second configuration, and from lines of the first configuration to points of a second configuration, in such a way that all of the configuration ... configuration, a graph having one vertex for each point or line in the configuration, is known as the Desargues graph . Because of the symmetries and self duality of the Desargues configuration, the Desargues ... A non Desargues 10 sub 3 sub 10 sub 3 sub configuration. As a projective configuration the Desargues configuration has the notation 10 sub 3 sub 10 sub 3 sub , meaning that each of its ten points ... configuration, with a vertex for each point and line of the configuration and an edge for every ... per line that are not isomorphic incidence isomorphic to the Desargues configuration, one of which ... with it. But in the Desargues configuration, these three points are always collinear ... of perspectivity while in the other configuration shown in the illustration these three points ... more details
The configuration of a molecule is the permanent geometry that results from the space spatial arrangement of its chemical bond bonds . The ability of the same set of atoms to form two or more molecules with different configurations is stereoisomerism . Used as drugs, compounds with different configuration normally have different physiological activity, including the desired pharmacological effect, the toxicology and the metabolism. ref name Ariens Everhardus Ari ns Stereochemistry, a basis for sophisticated nonsense in pharmacokinetics and clinical pharmacology , European Journal of Clinical Pharmacology 26 1984 663 668, DOI 10.1007 BF00541922 . ref Configuration is distinct from chemical conformation , a shape attainable by bond rotation s. See also Chemical conformation Absolute configuration External links http www.iupac.org goldbook C01249.pdf The IUPAC definition of configuration References references chem stub Category Molecules Category Stereochemistry de Konfiguration Chemie fa he nl Configuratie scheikunde ru sv Konfiguration ... more details
File Hesse configuration.svg thumb 240px The Hesse configuration, with four of its lines the four broken diagonal s of the 3× 3 array of points drawn as curves In geometry, the Hesse configuration ... 28 pages 68 96 . ref is a configuration of 9 points and 12 lines with three points per line and four ... . Description The Hesse configuration has the same incidence relations as the lines and points of the Affine ... of the Hesse configuration may be identified with ordered pair s of numbers modulo 3, and the lines of the configuration may correspondingly be identified with the triples of points x , y satisfying a linear equation nowrap 1 ax by c mod 3 . Alternatively, the points of the configuration ... of the configuration, one line is horizontal, one vertical, and two are diagonals or broken diagonals. Each line contains three points, so in the language of Configuration geometry configurations the Hesse configuration has the notation 9 sub 4 sub 12 sub 3 sub . Related configurations Removing any one point and its four incident lines from the Hesse configuration produces another configuration of type 8 sub 3 sub 8 sub 3 sub , the M bius Kantor configuration . ref citation last Dolgachev ... configuration, the 12 lines may be grouped into four triples of parallel non intersecting lines. Removing from the Hesse configuration the three lines belonging to a single triple produces a configuration of type 9 sub 3 sub 9 sub 3 sub , the Pappus configuration . ref name cox50 ref name ... first Steven H. last Cullinane year 2011 . ref The Hesse configuration may in turn be augmented by adding ... new points, to form a configuration of type 13 sub 4 sub 13 sub 4 sub , the set of points and lines of the projective plane over the three element field. Realizability The Hesse configuration can be realized .... Revue Internationale. 2e S rie volume 55 issue 3 pages 235 273 . ref The Hesse configuration shares with the M bius Kantor configuration the property of having a complex realization but not being ... more details
File Reye configuration.svg thumb 400px The Reye configuration In mathematics, the Reye configuration , introduced by harvs first Theodor last Reye authorlink Theodor Reye year 1882 txt , is a configuration of 12 points and 16 lines. Each point of the configuration belongs to four lines, and each line contains three points. Therefore, in the notation of Configuration geometry configurations , the Reye configuration is written as 12 sub 4 sub 16 sub 3 sub . Realization The Reye configuration can be realized ... figures to each other in four different ways, and the other four points of the configuration ... an instance of the Reye configuration harv Hilbert Cohn Vossen 1952 . The Reye configuration can also be realized by points and lines in the Euclidean plane , by drawing the three dimensional configuration in three point perspective . An 8 sub 3 sub 12 sub 2 sub configuration of eight points in the real ... to form the Reye configuration if and only if the eight points are a perspective projection of a parallelepiped ... configuration underlies some of the proofs of the Bell Kochen Specker theorem about the non existence of hidden variables in quantum mechanics. Related configurations The Pappus configuration ..., analogous to the interpretation of the Reye configuration involving desmic tetrahedra. If the Reye configuration is formed from a cube in three dimensional space, then there are 12 planes containing ... a 16 sub 3 sub 12 sub 4 sub configuration, the dual of the Reye configuration. The original Reye configuration and its dual together form a 28 sub 4 sub 28 sub 4 sub configuration harv Gr nbaum Rigby ... 2005 . References Citation last1 Aravind first1 P. K. title How Reye s configuration helps in proving ... pages 336 346 title The real configuration 21 sub 4 sub volume 41 year 1990 . Citation last1 Hilbert ... 8284 1087 8 year 1952 contribution 22. Reye s configuration pages 134 143 . See also pp. 154 157. citation ... Contemporanea mr 2592512 pages 21 27 title The generalized Reye configuration url http amc.imfm.si ... more details
A system configuration SC in systems engineering defines the computers, processes, and devices that compose the system and its boundary. More general the system configuration is the specific definition ... configuration can be used to relate to a model declarative for abstract generalized systems. In this sense the usage of the configuration information is not tailored to any specific usage, but stands ... and problems, and make upgrading a nightmare. Sample Configuration The following is a basic SC XML System Configuration code system configuration site name MyHouse hosts host ref name host1 hosts ... profile component name user setup component component name mysql db component system configuration code ... mysql , with appropriate parameters. Notice that the configuration schema requires no XML tags that are Microsoft ... for how the data is to be used. This is the hallmark for a good system configuration ... and must be managed and well thought out to prevent breaking the idea of the system configuration. Usage ... deployment deployment & System configuration Operations operations . Documentation One use of the configuration ..., thus complicating the data model. It is important to distinguish between configuration data ... the bloating of the data can reduce its usefulness. For example, the system configuration is not a place to record historical changes, or descriptions of design and intent for the various elements. The configuration ... it was . Deployment Deployment involves interpreting a configuration data set and acting on that data ... that the configuration is in effect. Examples include a Perl library launched from the command line to read the configuration and begin launching processes on the local or remote hosts ... the configuration data, and perform deployment like actions. Operations When the system is in operation, there may be uses for the configuration data by specific kinds of services in the system. For example, a Secnager may access the configuration to acquire the MD5 passwords for the user accounts ... more details
Configuration design is a kind of design where a fixed set of predefined components that can be interfaced connected in predefined ways is given, and an assembly i.e. designed artifact of components selected from this fixed set is sought that satisfies a set of requirements and obeys a set of constraints. The associated design configuration problem consists of the following three constituent tasks Selection of components, Allocation of components, and Interfacing of components design of ways the components interface connect with each other . Types of knowledge involved in configuration design include Problem specific knowledge Input knowledge Requirements Constraints Technology Case knowledge Persistent knowledge knowledge that remains valid over multiple problem solving sessions Case knowledge Domain specific, method independent knowledge Method specific domain knowledge Search control knowledge References Mittal, S. and Frayman, F. 1989 , Towards a generic model of configuration tasks , Proceedings of the 11th IJCAI, San Mateo, CA, USA, Morgan Kaufmann, pages 1395 1401. Bob Wielinga B. Wielinga and G. Schreiber 1997 , Configuration Design Problem Solving , IEEE Intelligent Systems, Vol. 12, pages 49 56. Levin, M. Sh. 2009 , Combinatorial optimization in system configuration design , Autom. Remote Control, Vol. 70 Num. 3, Plenum Press, New York, NY, USA, pages 519 561. Category Design ... more details
File Pappus hexagon.svg thumb 240px The Pappus configuration In geometry , the Pappus configuration is a Configuration geometry configuration of nine points and nine lines in the Euclidean plane , with three points per line and three lines through each point. ref citation last Gr nbaum first Branko authorlink Branko Gr nbaum isbn 978 0 8218 4308 6 location Providence, RI mr 2510707 page xiv 399 publisher American Mathematical Society series Graduate Studies in Mathematics title Configurations of points and lines volume 103 year 2009 . ref It is named after Pappus of Alexandria Pappus s hexagon theorem states that every two triples of collinear points ABC and abc none of which lie on the intersection of the two lines can be completed to form a Pappus configuration, by adding the six lines Ab , aB , Ac , aC , Bc , and bC , and their three intersection points nowrap 1 X Ab aB , nowrap 1 Y Ac aC , and nowrap 1 Z Bc bC . According to Pappus theorem, the resulting system of nine points and eight lines always has a ninth line containing the three intersection points X , Y , and Z . ref harvtxt Gr nbaum 2009 , p. 9. ref File Pappus graph LS.svg thumb The Pappus graph The Levi graph of the Pappus configuration is known as the Pappus graph . It is a bipartite graph bipartite symmetric graph ... configuration can also be derived from two triangles XcC and YbB that are in perspective with each ... different ways, together with their three centers of perspectivity Z , a , and A . The points of the configuration are the points of the triangles and centers of perspectivity, and the lines of the configuration are the lines through corresponding pairs of points. The Desargues configuration can also be defined in terms of perspective triangles, and the Reye configuration can be defined analogously ... these four points to form a Pappus configuration in such a way that all nine points lie on the curve ... Theory volume 34 year 1987 . ref References reflist External links mathworld title Pappus Configuration ... more details
Image R S configuration.png 300px right Absolute configuration An absolute configuration in stereochemistry is the spatial arrangement of the atom s of a chirality chemistry chiral molecular entity or group and its stereochemical description e.g. R or S . ref GoldBookRef title absolute configuration url http goldbook.iupac.org A00020.html ref Absolute configurations for a chiral molecule in pure form are most often obtained by X ray crystallography . All enantiomerically pure chiral molecules crystallise in one of the 65 Sohncke Group s Chiral Space Groups . Alternative techniques are Optical rotatory dispersion , Ultraviolet visible spectroscopy of stereoisomers vibrational circular dichroism and the use of chiral shift reagent s in proton NMR . When the absolute configuration is obtained the assignment of R or S is based on the Cahn Ingold Prelog priority rule s. Absolute configurations are also relevant to characterization of crystal s. Until 1951 it was not possible to obtain the absolute configuration of chiral compounds. ref Organic Chemistry 4th Edition Paula Y. Bruice ref It was at some time decided that glyceraldehyde was the R enantiomer. The configuration of other chiral compounds was then related to that of glyceraldehyde by sequences of chemical reaction s. For example glyceraldehyde 1 was related to glyceric acid 2 oxidation by mercury oxide which in turn was related to isoserine 3 nitric acid oxidation and bromide 4 and lactic acid 5 zinc reduction . Because the chemical ... in absolute configuration In 1951 Johannes Martin Bijvoet Bijvoet for the first time ... scattering , to determine absolute configuration. ref Determination of the Absolute Configuration ... and from its configuration R,R it was deduced that the original guess for glyceraldehyde was correct. See also Molecular configuration References Reflist DEFAULTSORT Absolute Configuration Category Stereochemistry Link FA pl fr Configuration absolue nl Absolute configuratie pl Konfiguracja absolutna ... more details
Configuration graphs are a theoretical tool used in computational complexity theory to prove a relation between Graph mathematics graph reachability and Computational complexity theory Complexity classes complexity classes . Definition A theoretical computational model, like Turing machine or finite automata , explains how to do a computation. The model explains both what is an initial configuration of the machine and which steps can be taken to continue the computation, until we eventually stop. A configuration , also called an Instantaneous Description ID is a finite representation of the machine at a given time. For example, for a finite automata and a given input, the configuration will be the current state and the number of read letters, for a Turing machine it will be the state, the content of the tape and the position of the head. A configuration graph is a directed labeled graph where the label of the vertices are the possible configurations of the models and where there is an edge from one configuration to another if it correspond to a computational step of the model. The initial and accepting configuration s of the machine are special vertices of the configuration graph. The computation accepts if and only if there is a path from an initial vertex to an accepting vertex. Useful property If the computation is deterministic then from any configuration there is at most one possible step, so the graph is of out degree 1, and there is exactly one initial state. Once we add a dummy initial vertex with an edge to every initial vertex and a dummy accepting vertex with an edge .... It is also possible to have finite graphs on finite automata , the configuration is composed of the position of the head and the current state, so the configuration graph is of size math O n math . Use ... in space which is logarithmic in the size of the input, and since the configuration of the Turing ... for a deterministic model whose configuration are of space which is logarithmic in the size of the input ... more details
File Perles configuration.svg thumb The Perles configuration In geometry, the Perles configuration is a configuration of 9 points and 9 lines that can be realized in the Euclidean plane but for which every realization has at least one irrational number as one of its coordinates. It is not a projective configuration , however, because its points and lines do not all have the same number of incidences as each other. It was introduced by Micha Perles in the 1960s. One way of constructing the Perles configuration is to start with a regular pentagon and its five diagonals, which form the sides of a smaller regular pentagon within the initial one. The nine points of the configuration consist of four out of the five vertices of each pentagon and the shared center of the two pentagons the two missing pentagon vertices are chosen to be collinear with the center. The nine lines of the configuration consist of the five lines that are diagonals of the outer pentagon and sides of the inner pentagon, and the four lines that pass through the center and through corresponding pairs of vertices from the two pentagons. Every realization of this configuration in the real projective plane is equivalent, under a projective transformation , to a realization constructed in this way from a regular pentagon. Therefore, in every realization, there are four points having the same cross ratio as the cross ratio of the four collinear points in the realization derived from the regular pentagon. But, these four points have math 1 varphi math as their cross ratio, where math varphi math is the golden ratio ... ratio, so the Perles configuration cannot be realized by rational points. Branko Gr nbaum has conjectured that every configuration that can be realized by rational but not irrational numbers has at least nine points if so, the Perles configuration would be the smallest possible irrational configuration of points and lines. ref harvtxt Gr nbaum 2003 . ref Perles used his configuration to construct ... more details
In geometry, the Kummer configuration , named for Ernst Kummer , is a geometric configuration of 16 points and 16 planes such that each point lies on 6 of the planes and each plane contains 6 of the points. The 16 nodes and 16 trope mathematics trope s of a Kummer surface form a Kummer configuration. References Citation authorlink R. W. H. T. Hudson last1 Hudson first1 R. W. H. T. title Kummer s quartic surface publisher Cambridge University Press series Cambridge Mathematical Library isbn 978 0 521 39790 2 id MathSciNet id 1097176 year 1990 Category Configurations Category Algebraic geometry ... more details
projective geometry , a configuration in the plane consists of a finite set of points, and a finite ... is incident to the same number of points. ref In the literature, the terms projective configuration harv Hilbert Cohn Vossen 1952 and tactical configuration of type 1,1 harv Dembowski 1968 are also used ... graph theory girth of the corresponding bipartite graph the Levi graph of the configuration must be at least six. Notation A configuration in the plane is denoted by p sub sub ... p sub sub sub sub does not determine a projective configuration up to incidence structure ... the Pappus configuration and two less notable configurations. In some configurations, p ... Image Non Desargues configuration.svg 240px thumb right A 10 sub 3 sub configuration that is not incidence isomorphic to a Desargues configuration Notable projective configurations include the following 1 sub 1 sub , the simplest possible configuration, consisting of a point incident to a line .... More generally any polygon of n sides forms a configuration of type n sub 2 sub 4 sub 3 sub 6 .... 7 sub 3 sub , the Fano plane . This configuration exists as an abstract incidence geometry , but cannot be constructed in the Euclidean plane . 8 sub 3 sub , the M bius Kantor configuration . This configuration ... nontrivial solutions in complex number s. 9 sub 3 sub , the Pappus configuration . 9 sub 4 sub 12 sub 3 sub , the Hesse configuration of nine inflection point s of a cubic curve in the complex projective plane and the twelve lines determined by pairs of these points. This configuration shares with the Fano ... that they cannot be given real number coordinates harv Kelly 1986 . 10 sub 3 sub , the Desargues configuration ... surface 15 sub 3 sub , the Cremona Richmond configuration , formed by the 15 lines complementary to a double six and their 15 tangent planes 12 sub 4 sub 16 sub 3 sub , the Reye configuration . 16 sub 6 sub , the Kummer configuration . 60 sub 15 sub , the Klein configuration . Duality of configurations ... more details
Cleanup date July 2010 The GlobalPlatform UICC configuration is a configuration of the GlobalPlatform Card specification v2.2 to standardized a minimum interoperability for Subscriber Identity Module SIM USIM products for supporting remote application management via OTA. The GlobalPlatform UICC Configuration outlines a common and neutral environment to facilitate the secure delivery and management over the air OTA of new and creative mobile services to consumers. GlobalPlatform Card specification V2.2 http www.globalplatform.org specificationscard.asp has been published in March 2006. It provides dynamic post issuance card management, including dynamic addition & modification of applications.This specification defines card components, command sets, transaction sequences and interfaces. The specification is completely neutral in relation to hardware, operating system, vendor and application, making it applicable to any type of application and industry. It provides dynamic post issuance card management, including dynamic addition & modification of applications. A key feature of the UICC Configuration is its flexibility, which enables the issuer to select the services to be offered to third ..., this configuration also allows the actors involved in the delivery of a mobile implementation to use ... , and trusted service managers. Content of this standard Three types of Security Domains exist for this configuration ... into GlobalPlatform s UICC Configuration. This cross market contribution has been vital in achieving ... specifies configuration requirements for implementing GlobalPlatform Specifications on the UICC ... the UICC configuration. Further information on NFC is available at near field communication NFC . Deployment UICC configuration has been endorsed by ETSI in the recent release of the TC 102.225 rel7 Pegasus Project http www.payezmobile.com AEPM will rely on the UICC configuration StoLPaN http www.stolpan.com ... Access UICC configuration is available at http www.globalplatform.org specificationscard.asp Card ... more details
Multiple issues wikify February 2012 orphan February 2012 refimprove December 2011 unreliable sources December 2011 Construction by Configuration CbC ref Sommerville Ian 2008 . Construction by Configuration Challenges for Software Engineering. Research and Practice. St Andrews, Scotland. ref is a process defined by Ian Sommerville academic Ian Sommerville in 2008 for the adoption of a Commercial off the shelf systems COTS in an organization. This can range from simple parameter setting through the definition of business rules to special purpose components development. According to Sommerville, many companies and government organizations have changed their strategy from specify and develop to buy and configure. Thus, generic systems are purchased and configured to create a specific version applied to an organization context by adapting modules to structures, business lines and processes. In his work, Sommerville identified three 3 types of configurable systems single PC based applications with built in, modular generic systems such as ERP systems and COTS assemblies. He determined that the most complex and risky to configure are the COTS, and indicated that regardless of the facilities that this software category provides, a set of activities that are common in the configuration process should be managed to address avoid the mostly failures reported. These are System selection. Requirements analysis. Business process redesign. System configuration . System testing . Deployment and evolution. References Reflist Category Procurement practices ... more details
In geometry, a face configuration is notational description of a face transitive polyhedron . It represents a sequential count of the number of faces that exist at each vertex geometry vertex around a face geometry face . There is no single standard accepted representation, but one common notation prefixes the description with a V and separates the vertices by a period . or a comma , . Image Rhombic dodecahedron v3434.png thumb The rhombic dodecahedron alternates three faces per vertex and four faces per vertex BR V3.4.3.4 For example, V3.4.3.4 represents the rhombic dodecahedron which is face transitive every face is a rhombus , and alternating vertices of the rhombus contain 3 or 4 faces each. Another form of this notation, used in Tilings and Patterns , has brackets around the symbol, for instance 3.4.3.4 . Face transitive polyhedra are generally the Dual polyhedron polyhedral dual s of the vertex transitive polyhedra, which are described by a parallel vertex configuration notation. That notation omits the V prefix and represents sequentially the number of edges of the faces around a vertex. For example, 3.4.3.4 is the cuboctahedron with alternating triangle triangular and square geometry square faces around each vertex. Polyhedra have the same representation in face configuration notation with the addition of the V that their duals have in vertex configuration notation. The rhombic dodecahedron V3.4.3.4 and the cubocahedron 3.4.3.4 above are dual polyhedra. See also Platonic solid s five regular polyhedron regular polyhedra that are either self dual or whose dual is another Platonic solid. Catalan solid s thirteen polyhedra that are dual to the Archimedean solid s Bipyramid s an infinite set of duals of Prism geometry prism s Trapezohedron s an infinite set of duals of antiprism s List of uniform planar tilings References The Geometrical Foundation of Natural Structure book Branko Gr nbaum and G. C. Shephard Tilings and Patterns . New York W. H. Freeman & Co., 1987 ... more details
Electronic structure methods Configuration interaction CI is a post Hartree&ndash Fock linear variational method for solving the nonrelativistic Schr dinger equation within the Born&ndash Oppenheimer approximation for a Quantum chemistry quantum chemical multi electron system. Mathematically, configuration simply describes the linear combination of Slater determinant s used for the wave function. In terms of a specification of orbital occupation for instance, 1s sup 2 sup 2s sup 2 sup 2p sup 1 sup ... , interaction means the mixing interaction of different electronic configurations states . Due to the long CPU time and immense hardware required for CI calculations, the method is limited to relatively small systems. In contrast to the Hartree&ndash Fock method, in order to account for electron correlation , CI uses a variational wave function that is a linear combination of configuration state function s CSFs built from spin orbitals denoted by the superscript SO , math Psi sum I 0 c I Phi I SO c 0 Phi 0 SO c 1 Phi 1 SO ... math where is usually the electronic ground state of the system. If the expansion includes all possible Configuration state function CSF s of the appropriate symmetry, then this is a full configuration interaction procedure which exactly solves the electronic Schr dinger equation within the space spanned by the one particle basis set. The first term in the above ... configuration interaction . MRCI also gives better correlation of the ground state which is important ... and energies. See also Coupled cluster Electron correlation Multireference configuration interaction MRCI Multi configurational self consistent field MCSCF Post Hartree&ndash Fock Quadratic configuration ... Sherrill first2 Henry F. last2 Schaefer III contribution The Configuration Interaction Method Advances ... Hartree Fock methods de Configuration Interaction es Interacci n de configuraciones fr Interaction de configuration ko it Interazione di configurazione ja pl Metoda oddzia ywania konfiguracji ... more details
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