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cohesion
cohesion (functional cohesion) A measure of the degree to which parts of a program module are closely functionally related. High cohesion means that each part is directed toward and essential for that module to perform its required function, and that the module performs only that function. Low cohesion might be due to convenience grouping of functions that are unrelated by function, timing, logic, procedure, or by sequence.
Temporal cohesion occurs where a module contains several functions that must be performed at the same time, but are not closely related by function. Logical cohesion is where several logically related functions are placed in the same module. For example a unit may handle all input to a program irrespective of its source being from disk, communications port, keyboard, etc. Procedural cohesion is where functions that must be performed in a certain order are grouped together in the same module. Sequential cohesion occurs when the output from one part of a module is the input to the next part, but if the module is not constructed for functional cohesion it is possible that not all the related parts will occur in the one module. High functional cohesion might be seen as one characteristic of good design. See also coupling. |
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Cite this article
JOHN DAINTITH. "cohesion." A Dictionary of Computing. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. JOHN DAINTITH. "cohesion." A Dictionary of Computing. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O11-cohesion.html JOHN DAINTITH. "cohesion." A Dictionary of Computing. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O11-cohesion.html |
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adhesion and cohesion
adhesion and cohesion attractive forces between material bodies. A distinction is usually made between an adhesive force, which acts to hold two separate bodies together (or to stick one body to another) and a cohesive force, which acts to hold together the like or unlike atoms, ions, or molecules of a single body. However, both forces result from the same basic properties of matter . A number of phenomena can be explained in terms of adhesion and cohesion. For example, surface tension in liquids results from cohesion, and capillarity results from a combination of adhesion and cohesion. The hardness of a diamond is due to the strong cohesive forces between the carbon atoms of which it is made. Friction between two solid bodies depends in part upon adhesion. |
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"adhesion and cohesion." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "adhesion and cohesion." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1E1-adhesion.html "adhesion and cohesion." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-adhesion.html |
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cohesion
cohesion
1. The force of attraction between like molecules. Cohesion provides the force that holds up a column of water in the xylem tissue of plants without it breaking. The cohesion–tension theory is the most widely accepted explanation for the continual flow of water upwards through the xylem of a plant. Water is removed from the plant by the process of transpiration, which creates a tension that pulls the water in the xylem upwards as a single column held together by cohesive forces. 2. (in botany) The union of like parts, such as the fusion of petals that occurs in some flowers. |
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"cohesion." A Dictionary of Biology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "cohesion." A Dictionary of Biology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O6-cohesion.html "cohesion." A Dictionary of Biology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-cohesion.html |
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cohesion
cohesion Ability of particles to stick together without dependence on interparticle friction. In soils, cohesion is due to the shearing strength of the cement or film of water that separates individual grains. In powder technology, cohesion refers to the forces of attraction by which the particles are held together either by compaction or a binding substance.
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AILSA ALLABY and MICHAEL ALLABY. "cohesion." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "cohesion." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-cohesion.html AILSA ALLABY and MICHAEL ALLABY. "cohesion." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-cohesion.html |
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cohesion
co·he·sion / kōˈhēzhən/ • n. the action or fact of forming a united whole: the work at present lacks cohesion. ∎ Physics the sticking together of particles of the same substance. |
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"cohesion." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "cohesion." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O999-cohesion.html "cohesion." The Oxford Pocket Dictionary of Current English. 2009. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-cohesion.html |
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cohesion
cohesion Mutual attraction between the component atoms, ions or molecules of a substance. Weak cohesive forces permit the fluidity of liquids; those of solids are much stronger. Liquids form droplets because of surface tension caused by cohesion.
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"cohesion." World Encyclopedia. 2005. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "cohesion." World Encyclopedia. 2005. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O142-cohesion.html "cohesion." World Encyclopedia. 2005. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-cohesion.html |
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cohesion
cohesion The ability of particles to stick together without dependence on interparticle friction. In soils, cohesion is due to the shearing strength of the cement or film of water that separates individual grains.
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MICHAEL ALLABY. "cohesion." A Dictionary of Ecology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "cohesion." A Dictionary of Ecology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O14-cohesion.html MICHAEL ALLABY. "cohesion." A Dictionary of Ecology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-cohesion.html |
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cohesion
cohesion see adhesion and cohesion . |
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Cite this article
"cohesion." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "cohesion." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1E1-X-cohesion.html "cohesion." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-cohesion.html |
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adhesion
adhesion
•abrasion, Australasian, equation, Eurasian, evasion, invasion, occasion, persuasion, pervasion, suasion, Vespasian
•adhesion, cohesion, Friesian, lesion
•circumcision, collision, concision, decision, derision, division, elision, envision, excision, imprecision, incision, misprision, precisian, precision, provision, scission, vision
•subdivision • television • Eurovision
•LaserVision
•corrosion, eclosion, erosion, explosion, implosion
•allusion, collusion, conclusion, confusion, contusion, delusion, diffusion, effusion, exclusion, extrusion, fusion, illusion, inclusion, interfusion, intrusion, obtrusion, occlusion, preclusion, profusion, prolusion, protrusion, reclusion, seclusion, suffusion, transfusion
•Monaghan • Belgian
•Bajan, Cajun, contagion, Trajan
•Glaswegian, legion, Norwegian, region
•irreligion, religion
•Injun • Harijan • oxygen • antigen
•sojourn • donjon • Georgian
•theologian, Trojan
•Rügen
•bludgeon, curmudgeon, dudgeon, gudgeon, trudgen
•dungeon • glycogen • halogen
•collagen • Imogen • carcinogen
•hallucinogen • androgen
•oestrogen (US estrogen)
•hydrogen • nitrogen
•burgeon, sturgeon, surgeon
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Cite this article
"adhesion." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "adhesion." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O233-adhesion.html "adhesion." Oxford Dictionary of Rhymes. 2007. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-adhesion.html |
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cohesion
cohesion
•abrasion, Australasian, equation, Eurasian, evasion, invasion, occasion, persuasion, pervasion, suasion, Vespasian
•adhesion, cohesion, Friesian, lesion
•circumcision, collision, concision, decision, derision, division, elision, envision, excision, imprecision, incision, misprision, precisian, precision, provision, scission, vision
•subdivision • television • Eurovision
•LaserVision
•corrosion, eclosion, erosion, explosion, implosion
•allusion, collusion, conclusion, confusion, contusion, delusion, diffusion, effusion, exclusion, extrusion, fusion, illusion, inclusion, interfusion, intrusion, obtrusion, occlusion, preclusion, profusion, prolusion, protrusion, reclusion, seclusion, suffusion, transfusion
•Monaghan • Belgian
•Bajan, Cajun, contagion, Trajan
•Glaswegian, legion, Norwegian, region
•irreligion, religion
•Injun • Harijan • oxygen • antigen
•sojourn • donjon • Georgian
•theologian, Trojan
•Rügen
•bludgeon, curmudgeon, dudgeon, gudgeon, trudgen
•dungeon • glycogen • halogen
•collagen • Imogen • carcinogen
•hallucinogen • androgen
•oestrogen (US estrogen)
•hydrogen • nitrogen
•burgeon, sturgeon, surgeon
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Cite this article
"cohesion." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "cohesion." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O233-cohesion.html "cohesion." Oxford Dictionary of Rhymes. 2007. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-cohesion.html |
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