Image Water cycle.png thumb 320px right A commonly cited example is the water cycle . In ecology and Earth science , a biogeochemicalcycle or nutrient cycle is a pathway by which a chemical element or molecule ... well known and important biogeochemical cycles, for example, include the carbon cycle , the nitrogen cycle , the oxygen cycle , the phosphorus cycle , the sulfur cycle and the water cycle . There are many biogeochemical cycles that are currently being studied for the first time as climate change ... unknown cycles. These newly studied biogeochemical cycles include the mercury cycle ref http wi.water.usgs.gov .... ref and the human caused cycle of atrazine , which may affect certain species. Biogeochemical cycles ... Nature Sulfur Cycle References Reflist Biogeochemicalcycle state expamded modelling ecosystems DEFAULTSORT BiogeochemicalCycle Category Ecological cycles Category Geochemistry Category Biogeography ... or lake for water . Water, for example, is always recycled through the water cycle, as shown ... the biogeochemical cycles. ref Prentice Hall Biology. ref ref http www.lenntech.com matter cycles.htm ... elements occurring in organisms are part of biogeochemical cycles. In addition to being a part of living organisms, these chemical elements also cycle through abiotic factors of ecosystems such as water ... Biogeochemical Cycles ref The flow of energy in an ecosystem is an open system the sun constantly ... cycle , sulfur can be forever recycled as a source of energy. Energy can be released through ... for a long period of time. ref name carbon http csmres.jmu.edu geollab idls carboncycle.htm Biogeochemical Cycles Carbon Cycle. ref When chemicals are held for only short periods of time, they are being .... However, overall balance may involve compartments distributed on a global scale. As biogeochemical ... multidiciplinary. The carbon cycle may be related to research in ecology and atmospheric sciences . ref http neespi.org science NEESPI SP chapters SP Chapter 3.2.pdf A. G. Georgiadi, et al. 3.2. Biogeochemical ... more details
wiktionarypar cycle cyclic cyclical tocright Cycle , and in some cases cyclic , may refer to A cycle of a repeating event or process with Frequency periodicity in many fields physics, mathematics, audio, economics, etc. is one complete occurrence of the event which repeats Bicycle Motorcycle Human powered vehicle Helicopter flight controls Cyclic Cyclic control , one of the main controls on a helicopter Chemistry Cyclic compound Economics Business cycle , economy wide fluctuations in production or economic activity over several months or years Mathematics and physics Algebraic cycle and Hodge cycle , homology classes in algebraic geometry Cycle graph theory , a nontrivial path in a graph from a node to itself Cycle mathematics , a basic permutation all permutations are products of cycles Cyclic mathematics shows other terms in mathematics beginning with cyclic or cycle Turn geometry or cycle, a unit of plane angle equal to 360 degrees Music Cycle music , a section of a piece that is repeated or repeatable Cyclic form , a technique of construction involving multiple sections or movements Cycles Cartel album Cycles Cartel album Cycles Doobie Brothers album Cycles Doobie Brothers album Cycles Frank Sinatra album Cycles Frank Sinatra album Interval cycle , a collection of pitch classes generated from a sequence the same interval class Miscellaneous Cycle baseball , a single, double, triple, and home run in any order by the same player in one game Cycle film Cycle film , a 2008 Malayalam film Instruction cycle , the time period during which a computer processes a machine language instruction Cyclic flower , in botany, one way in which flower parts may be arranged Battery cycle , when a battery is charged. Social cycle various cycles in social sciences See also lookfrom intitle lookfrom cycl intitle cycl List of cycles disambig cs Cyklus de Zyklus el eo Ciklo fr Cycle io Ciklo hu Ciklus egy rtelm s t lap ja no Kretsl p pl Cykl ru simple Cycle ... more details
See also Hitting for the cycle Expand Persian fa yes date December 2009 The Cycle , Dayereh ye Mina is a 1975 Iran ian film directed by Dariush Mehrjui . It was Iran s List of submissions to the 50th Academy Awards for Best Foreign Language Film submission for Best Foreign Language Film at the 50th Academy Awards , the first year that Iran participated in the award. The movie s plot centered on the illegal trade in blood donations against the backdrop poverty and life in shanty towns . http tehranavenue.com article.php?id 807 External links imdb title 0077403 DEFAULTSORT Cycle Category 1975 films Category Iranian films Category Films directed by Dariush Mehrjui Iran film stub Link FA fa fa ... more details
In ecology or geoscience , the iron cycle is the biogeochemicalcycle of iron through landform s, the Earth s atmosphere atmosphere , and ocean s. The iron cycle affects dust deposition and Particulate aerosol iron bioavailability. . References Jickells, T. D., et al. 2005, April 1 . Global iron connections between desert dust, ocean biogeochemistry, and climate. In Science, 308 , 67 &ndash 71. Category Geochemistry Category Geological processes geol stub th ... more details
unreferenced date March 2010 The mercury cycle is a biogeochemicalcycle involving mercury element mercury . Mercury is notable for being the only heavy metal which is liquid at room temperature. It is a volatile metal and evaporates easily, going into the atmosphere. Citation needed date February 2011 Processes of the mercury cycle Most natural mercury occurs as cinnabar Citation needed date February 2011 , mercury element Hg sulfur S . Here mercury Hg sup 2 sup is bound very tightly to sulfur, but weathering releases the mercury to the environment slowly. There are also trace amounts of mercury in coal . Mining mercury or burning coal results in releasing mercury. Volcanoes and forest fires are also sources of mercury. Human activities have at least doubled the amount of mercury around the globe Citation needed date April 2011 . Chlorine factories, among other sources, release mercury into the atmosphere. This mercury is deposited back onto land and water. Inorganic mercury can be converted by bacteria into the organometallic cation known as methylmercury , MeHg sup sup . This accumulates in fish. Over long periods of time, some mercury recombines with sulfur and is buried in sediments. Then, the cycle repeats itself all over again. See also Mercury in fish Biogeochemicalcycle Category Ecological cycles Category Mercury element geology stub chemistry stub biology stub fr Cycle du mercure ... more details
Cleanup date October 2008 The phosphorus cycle is the biogeochemicalcycle that describes the movement of phosphorus through the lithosphere , hydrosphere , and biosphere . Unlike many other biogeochemical ... of available P in the biogeochemicalcycle. ref name Turner Turner B.L et al. 2003 Organic phosphorus in the environment. CABI publishing ref However, the major transfers in the global cycle of P ... the soil or ocean are very slow, making the phosphorus cycle overall one of the slowest biogeochemical ... step in the biogeochemical phosphorus cycle, including the phosphorus nutrition of plants .... Phosphorus in the environment Image Phoscycle EPA.jpg thumb 400px The aquatic phosphorus cycle ... in the human body. ref Voet D and Voet J.G. 2003 Biochemistry pg 607 608. ref Process of the cycle ... is released back to the soil when plants or animal matter decomposes and the cycle repeats ... different forms. ref name Schlesinger ref Filippelli G.M 2002 The Global Phosphorus Cycle. Reviews .... The later stage of weathering and soil development. Available phosphorus is found in a biogeochemicalcycle in the upper soil profile, while phosphorus found at lower depths is primarily involved in geochemical ... released from dead organic matter in the biochemical cycle. Phosphorus is limited in supply for plant ... them through the soil or ocean are very slow, making the phosphorus cycle overall one of the slowest biogeochemical cycles. ref name Schlesinger ref Oelkers E.H 2008 Phosphate mineral reactivity from ... manured soils. ref Human interference in the phosphorus cycle occurs by overuse or careless use ... the global carbon cycle , but will probably do little to offset anthropogenic carbon emissions ... diversity. ref Filippelli G.M 2008 The Global Phosphorus Cycle Past, Present, and Future. Elements ... cycles The phosphorus cycle, Lenntech Water treatment & air purification, Holding B.V. 2006 http www.enviroliteracy.org article.php 480.html Environmental Literacy Council Phosphorus Cycle http www.epa.gov ... more details
Image Oxygen Cycle.jpg thumb 350px right The oxygen cycle. The Oxygen cycle is the biogeochemicalcycle that describes the movement of oxygen within its three main reservoirs the Earth s atmosphere atmosphere air , the total content of biological matter within the biosphere the global sum of all ecosystems , and the lithosphere Earth s crust . Failures in the oxygen cycle within the hydrosphere the combined mass of water found on, under, and over the surface of a planet can result in the development of hypoxic zone s. The main driving factor of the oxygen cycle is photosynthesis , which is responsible for the modern Earth s atmosphere and life. Reservoirs By far the largest reservoir of Earth s oxygen is within the silicate and oxide mineral s of the Crust geology crust and Mantle geology mantle 99.5 . Only a small portion has been released as free oxygen to the biosphere 0.01 and atmosphere 0.36 . The main source of atmospheric oxygen is photosynthesis, which produces sugars and oxygen from carbon dioxide and water 6CO sub 2 sub 6H sub 2 sub O energy C sub 6 sub H sub 12 sub O sub 6 sub 6O sub 2 sub Photosynthesizing organisms include the plant life of the land areas as well as the phytoplankton ... cycle reservoir capacities and fluxes. These numbers are based primarily on estimates from Walker, J.C.G. ref Walker, J. C. G. 1980 The oxygen cycle in the natural environment and the biogeochemical ... involved in the oxygen cycle border 1 cellpadding 10 align center Reservoir Capacity br kg O sub ... 3 sub References references Cloud, P. and Gibor, A. 1970, The oxygen cycle, Scientific American, September ... oxygen cycle, http paos.colorado.edu fasullo pjw class oxygencycle.html Morris, R.M., OXYSPHERE A Beginners Guide to the Biogeochemical Cycling of Atmospheric Oxygen, http seis.natsci.csulb.edu rmorris oxy Oxy.htm Biogeochemicalcycle Category Ecology Category Chemical oceanography Category Photosynthesis cs Kolob h kysl ku et Hapnikuringe es Ciclo del ox geno fr Cycle de l oxyg ne ko ... more details
cycle is itself a biogeochemicalcycle , ref The Environmental Literacy Council. http www.enviroliteracy.org ... including text, graphics and animations Biogeochemicalcycle DEFAULTSORT Water Cycle Category Hydrology ...Image Water cycle.png thumb 320px right The water cycle. The water cycle , also known as the hydrologic cycle or H sub 2 sub O cycle , describes the continuous movement of water on, above and below the surface ... places in the water cycle. Although the balance of water on Earth remains fairly constant over time .... In so doing, the water goes through different phases liquid, solid, and gas. The hydrologic cycle .... The water cycle figures significantly in the maintenance of life and ecosystems on Earth. Even as water in each reservoir plays an important role, the water cycle brings added significance to the presence ... cycle purifies water, replenishes the land with freshwater, and transports minerals to different parts ... as erosion and sedimentation. In addition, as the water cycle involves heat exchange, it exerts an influence on climate as well. Description The sun, which drives the water cycle, heats water ..., where our water cycle started. Different Processes Precipitation meteorology Precipitation ..., convert 398000 km3 cumi abbr on of it over the oceans. ref name The Water Cycle Dr. Art s Guide to Planet Earth. http www.planetguide.net book chapter 2 water cycle.html The Water Cycle. Retrieved ... water cycle hydrology.cgi Hydrologic Cycle. Retrieved on 2006 10 24. ref Subsurface Flow hydrology Subsurface ... name The Water Cycle Sublimation chemistry Sublimation The state change directly from solid water ... within the hydrologic cycle is the average time a water molecule will spend in that reservoir ... cycle describes the processes that drive the movement of water throughout the hydrosphere . However, much more water is in storage for long periods of time than is actually moving through the cycle ... cycle. ref name USGS http ga.water.usgs.gov edu watercycleoceans.html USGS, The Water Cycle Water ... more details
. The carbon cycle is the biogeochemicalcycle by which carbon is exchanged among the biosphere ... website with a carbon cycle applet for modeling your own projection. Biogeochemical ...For the thermonuclear reaction involving carbon that powers some stars CNO cycle Image Carbon cycle cute diagram.svg thumb 502px Diagram of the carbon cycle. The black numbers indicate how much carbon ... the biosphere and all of its organisms. Citation needed date April 2010 The carbon cycle was initially ... cycle. An examination of the carbon budget of a pool or reservoir can provide information ..., Roger.1993. The Carbon Cycle and Global Forest Ecosystem. Water, Air, and Soil Pollution 70, 295 ... of silicate rock see carbonate silicate cycle . Carbonic acid reacts with weathered rock ... important autotrophs for the carbon cycle are tree s in forests on land and phytoplankton in the Earth ... collected in such traps, so most biogeochemical analyses have erroneously ignored them. Carbon storage ... production net primary productivity follows a wiktionary diurnal diurnal and seasonal cycle, carbon ... reservoir of carbon in the carbon cycle. The dissolved calcium in the oceans comes from the chemical ... . eds. S.Draggan and C.Cleveland ref See also Biochar Breathing C4MIP Calvin cycle Carbon cycle re ... cycle Ocean acidification Peat bog Permafrost carbon cycle Primary production References Reflist Further ... title The global carbon cycle edition publisher Published on behalf of the Scientific Committee ... cycle editor William H Schlesinger editor title Biogeochemistry edition publisher Elsevier Science ... , Wallace S. editors title The Carbon Cycle and Atmospheric CO sub 2 sub Natural variations ... Carbon Cycle Science Program an interagency partnership. http www.esrl.noaa.gov gmd ccgg index.html NOAA s Carbon Cycle Greenhouse Gases Group http www.globalcarbonproject.org Global Carbon Project ... The present carbon cycle Climate Change carbon levels and flows http oco.jpl.nasa.gov NASA s Orbiting ... more details
In mathematics , the term cycle decomposition can mean In graph theory , a Cycle decomposition graph theory cycle decomposition is a partitioning of the vertices of a graph into subsets, such that the vertices in each subset lie on a Cycle graph theory cycle . In group theory , a Cycle decomposition group theory cycle decomposition is a useful convention for expressing a permutation in terms of its constituent cycles. mathdab ... more details
Wiktionary Life cycle or lifecycle may refer to Biological life cycle Enterprise Life Cycle Life cycle assessment New product development Product lifecycle Product life cycle management Product lifecycle management Project life cycle Software release life cycle Systems Development Life Cycle Adobe LiveCycle SOA Lifecycle Object lifetime of an object in object oriented programming Disambig de Lebenszyklus es Ciclo de vida eo Vivciklo fr Cycle de vie gl Ciclo de vida pt Ciclo de vida desambigua o zh ... more details
In graph theory and combinatorial optimization , cycle cover may have the following meanings Vertex cycle cover Vertex disjoint cycle cover Edge cycle cover Other possible meanings include A cover for a bicycle Vehicle insurance for a bicycle disambig ... more details
environ m3 s4 cycleSulfur.shtml Sulfur Cycle at Carnegie Mellon University http www.lenntech.com sulphur cycle.htm Lenntech Biogeochemicalcycle Category Metabolism Category Soil biology ... pyrite FeS sub 2 sub . The sulfur cycle has evolved with the Earth and the amount of sulfur available ... cycle. ref Bamford et al., 2002 ref Bacterial sulfate reduction BSR can only occur at temperature from ... of sup 34 sup S are on the order of 21 . Throughout geologic history the sulfur cycle and the isotopic ... cycle though time The isotopic composition of sedimentary sulfides provides primary information on the evolution of the sulfur cycle. The total inventory of sulfur compounds on the surface of the Earth ... boundary. Over a shorter time scale 10 million years changes in the sulfur cycle are easier to observe ... into the sulfur cycle through sulfate oxidation and then released when that sulfate is reduced once ... oxygen isotopic values it may be possible to use oxygen to trace the sulfur cycle. Biological sulfate ... time. Human Impact Human activities have had a major effect on the global sulfur cycle. The burning ... on these processes is to increase the pool of oxidized sulfur SO sub 4 sub in the global cycle ..., Structural basis for the oxidation of thiosulfate by a sulfur cycle enzyme European Molecular Biology ..., C.F., 1989, Human Influences on the sulphur cycle. pp. 77 121. In P. Brimblecombe and A.Y. Lein eds. , Evolution of the Global Biogeochemical Sulphur Cycle, Wiley, New York Canfield, D.E. and Raiswell, R., 1999, The evolution of the sulfur cycle American Journal of Science, vol. 299, p. ... Schwefelkreislauf et V vliringe el es Ciclo del azufre fr Cycle du soufre gl Ciclo do ... more details
aeration needed for nitrification. References reflist 2 Biogeochemicalcycle Category Nitrogen Cycle Category Ecological cycles Category Soil biology Category Nitrogen metabolism Category ... cycle is of particular interest to ecologists because nitrogen availability can affect the rate ... have dramatically altered the global nitrogen cycle. Ecological function Nitrogen is essential ... of land. The processes of the nitrogen cycle Nitrogen is present in the environment in a wide ... decomposition or humus built up. The processes of the nitrogen cycle transform nitrogen from one ... fit together to form the nitrogen cycle. Nitrogen fixation Main Nitrogen fixation Atmospheric nitrogen ... is an important step in the nitrogen cycle, which distributes the supply of this essential nutrient ... Nitrogen Cycle Causes and Consequences journal Issues in Ecology volume 1 pages 1 17 author1 ... inert nitrogen gas N sub 2 sub , completing the nitrogen cycle. This process is performed ... cycle Main Human impacts on the nitrogen cycle As a result of extensive cultivation of legumes ... to the global nitrogen cycle are most intense in developed countries and in Asia, where vehicle ... et L mmastikuringe es Ciclo del nitr geno eu Nitrogenoaren zikloa fa fr Cycle de l azote ... Nitrogen cycle sl Kro enje du ika su Daur nitrog n fi Typen kierto luonnossa sv Kv vets kretslopp ... more details
Unreferenced date April 2007 The term cycle of violence refers to repeated acts of violence as a cyclical pattern, associated with high emotions and doctrines of Retributive justice retribution or revenge . The pattern, or cycle, repeats and can happen many times during a relationship. Each phase may last a different length of time and over time the level of violence may increase. It often refers to violent behavior learned as a child and then repeated as an adult, therefore continuing on in a perceived cycle. In the context of Domestic violence abusive personal relationship s, such a cycle is also called a cycle of abuse . ref http www.europrofem.org contri 2 04 en en viol 81en vio.ht Norway Treatment Program For Men Who Batter Haugan, Grethemor Skagseth and N ttestad, Jim Aage. Norwegian University of Science and Technology. Trondheim, Norway ref Dead link date October 2010 See also Feud References reflist External links http sfhelp.org alert cycle map.htm Summary the unremarked cycle of family dysfunction http www.edvp.org GetInformed CycleOfViolence.aspx Eastside Domestic Violence Program http www.domesticviolence.org cycle of violence Cycle of Violence DEFAULTSORT Cycle Of Violence Category Abuse Category Violence sociology stub he ... more details
about a concept in graph theory space allocated to bicycles segregated cycle facilities In graph theory , an area of mathematics, a cycle space is a vector space defined from an undirected graph elements of the cycle space represent formal combinations of cycle graph theory cycles in the graph. Cycle spaces allow one to use the tools of linear algebra to study graphs. A cycle basis is a set of cycles that generates the cycle space. The binary cycle space Let G be a finite simple undirected graph ... cycle space . It is by definition the subspace generated by the edge sets of all the simple cycle ... here also shown dashed is not a simple cycle but an edge disjoint union of two simple cycles. center Image cycle space addition.png Example for adding two cycles center There are a number of basic results concerning the cycle space. The symmetric difference of two simple cycles is either a simple cycle or a union of edge disjoint simple cycles. Using this observation, one can show that an edge set is in the cycle space if and only if it is a disjoint union of simple cycles. Phrased another way the set F of edges is in the cycle space if and only if every vertex in the subgraph spanned by F has even degree. It is not necessary to use all cycles to generate the cycle space if G is connected and any spanning tree mathematics spanning tree T of G is given, then the fundamental cycle s of T form a basis linear algebra basis of the cycle space, known as a cycle basis . The Hamel dimension dimension of the cycle space of a connected graph is thus related to the number of vertices and edges ... provides a cycle basis. An important application of the cycle space are Dual graph Whitney s planarity ... graph s. The integral cycle space The foregoing development can be carried out over the integers ... of the graph in order to define the cycle space, but the definition does not depend on that choice. An integral cycle is a function such that the sum of values on edges oriented into a vertex x equals ... more details
Mergeto V lsungasaga date January 2010 Unreferenced auto yes date December 2009 The V lsung Cycle is a series of legend s in Norse mythology that were first recorded in Middle Ages medieval Iceland . The original Icelandic tales were greatly expanded with native Scandinavian folklore , including that of Helgi Hundingsbane , which, in turn, originally appears to have been a separate tradition the Ylfing s. Mythological material in this Cycle includes the Volsunga Saga , the tale of the tr Otter s Ransom , and others. The V lsung Cycle is partially based on the same subject matter as the Middle High German epic poem Niebelungenlied . See also Volsung Tyrfing Cycle V lsung Norse mythology DEFAULTSORT Volsung Cycle Category Norse mythology Category European mythology Category V lsung cycle Euro myth stub bg el sv V lsungacykeln ... more details
orphan date February 2010 Sick Cycle are electronic music producers Michael West and Levon Maeder from Christchurch , New Zealand , whose style leans towards the heavier sounds of dubstep , drum and bass and breakbeat . Discography Malice 2011, Sick Cycle Records Devil Music Acid Rape 2010, Sick Cycle Records Smoke & Mirrors EP 2010, Section 8 Recordings Various EP 2010, Rottun Recordings Hells Winter EP 2010, Section 8 Recordings Hive Mind EP 2009, Rottun Recordings External links http www.discogs.com artist Sick Cycle Sick Cycle at Discogs http www.sickcycle.co.nz Sick Cycle Main Website Category New Zealand musicians Category Electronic musicians Category Drum and bass musicians Category Dubstep musicians ... more details
Orphan date November 2010 Cycle News was a motorcycling magazine in the United States , published from 1965 to 2010. The magazine was headquartered in Costa Mesa, California and best known for coverage of motorcycle racing. Cycle News was founded in 1965, in Long Beach, California by Chuck and Sharon Clayton. Chuck Clayton purchased a troubled Los Angeles area motorcycling newspaper and changed its name to Cycle News . The Claytons initially ran Cycle News out of their living room. Chuck worked exclusively on the newspaper, relying on Sharon s income at JR Engineering to support the family and keep Cycle News afloat. On evenings and weekends, Sharon handled the business side of the newspaper ... Cite web url http www.superbikeplanet.com 2010 Aug 100831cyclenews.htm title Cycle News Closes date ... races, and was a key source for racing results. Cycle News covered road racing, off road, motocross .... ref Cite web url http www.motorcycle usa.com 2 7841 Motorcycle Article Cycle News Closes.aspx title Cycle News Folds? date 2010 08 31 accessdate 2010 09 01 ref ref Cite web url http hellforleathermagazine.com 2010 09 official cycle news stops publishing title Official Cycle News stops publishing date 2010 09 01 accessdate 2010 09 07 ref Cycle News eventually became one of the highest selling ... Cycle News Folds? date 2010 08 31 accessdate 2010 09 01 ref Cycle News was one of several motorcycle ... for Cycle News Newspaper date 2010 09 02 accessdate 2010 09 02 ref On August 27, 2010, Cycle News Editor Paul Carruthers announced that he was no longer employed at Cycle News . Carruthers, who is a well respected journalist in the motorcycle industry, Citation needed date November 2010 had worked at Cycle ... Splits With Cycle News date 2010 08 27 accessdate 2010 09 01 ref Cycle News closed on August 31 ... industry mag Cycle News ceases publication date 2010 09 01 accessdate 2010 09 02 ref Cycle News made ... 7, 2010, publisher Bob NorVelle reported that Cycle News would continue to feature motorcycle news ... more details
thermodynamics cTopic Processes and Cycles The Kleemenko cycle or one flow cascade cycle is a single stream mixed refrigerant technique used to cool or Liquefaction of gases liquify gases . The term Kleemenko Cycle is used in refrigeration if multi component refrigerants MCR are used in a cycle ref http www.cryogenicsociety.org resources cryo central history of cryogenics History of cryogenics ref . The Russians Russian scientist A.P. Kleemenko described the one flow cascade cycle in the Proceedings of XIII International Conference of Refrigeration in Copenhagen, Denmark, in 1959. It was published in progress in refrigeration science and technology , Volume I Pergamon Press in 1960 pps. 34 39 ref http www.freepatentsonline.com 3592015.html rectification column with two component closed heat exchange cycle ref . See also Hampson Linde cycle Timeline of low temperature technology References reflist External links http cat.inist.fr ?aModele afficheN&cpsidt 1809635 Kleemenko cycle coolers Low cost refrigeration at cryogenic temperatures Thermodynamic cycles state uncollapsed Category Thermodynamic cycles physics stub ... more details
Orphan date February 2009 Refimprove date December 2008 Cycle Oregon is a week long recreational bicycle ride held annually in different parts of the U.S. state of Oregon . It is also the name of a non profit corporation established in 1991 to manage the event. More than a thousand riders participate every year and are supported by vans, meals and facilities. History The first Cycle Oregon took place in September 1988, covering 320 miles 515 kilometers between the Oregon cities of Salem, Oregon Salem and Brookings, Oregon Brookings . More than 1,000 cyclists participated. Description Cycle Oregon currently limits itself to 2,000 participants. The Cycle Oregon route varies from year to year. In 2008, Cycle Oregon began in Elgin, Oregon Elgin on September 6, and finished at Wallowa Lake on September 12, covering more than 420 miles 676 kilometers . Cycle Oregon is a supported ride participants are provided with meals, camping facilities, shower and restroom facilities, and sag wagon support. The cost in 2008 was 825 per rider. Proceeds from Cycle Oregon are donated to charitable projects in the communities that host the event. External links http www.cycleoregon.com Cycle Oregon official website Category Cycling in Oregon Category Organizations based in Oregon Category Bicycle tours Category Cycling organizations in the United States ... more details
Thermodynamics cTopic Processes and Cycles The Vuilleumier cycle is a thermodynamic cycle with applications in low temperature cooling . In some respects it resembles a Stirling cycle or engine, although it has two displacer s with a mechanical linkage connecting them as compared to one in the Stirling cycle. The hot displacer is larger than the cold displacer. The coupling maintains the appropriate phase difference . The displacers do no work emdash they are not pistons. Thus no work is required in an ideal case to operate the cycle. In reality friction and other losses mean that some work is required. Devices operating on this cycle have been able to produce Thermodynamic temperature temperature s as low as 15 Kelvin K using liquid nitrogen to pre cool. Without precooling 77 K was reached with a heat flow of 1 W. The cycle was first patented by Vuilleumier in 1918, and again in Leiden by KW Taconis in 1951. References Experimental techniques in low temperature physics, Guy Kendall White, Philip J. Meeson, Oxford University Press, 2002, p. 30 http books.google.co.uk books?id xO0xMe7JvOsC&lpg PA30&vq Vuilleumier&dq Vuilleumier 20cycle&pg PA30 v snippet&q Vuilleumier&f false Link Thermodynamic cycles DEFAULTSORT Vuilleumier Cycle Category Thermodynamics ... more details
Orphan date February 2009 Wikify date April 2010 Information cycle is the progression of events over time as being processed by media. For example, a story event goes through a series of stages as it evolves by media presented first by the Web, TV, Radio, newspapers, magazines, scholarly journals, and eventually comes into books. Just to stub. Please, clean up See also Information Research Publication cycle External links http www.libraries.psu.edu instruction infocycle infocycle.html Information cycle http www.lib.washington.edu uwill research101 Research 101 http www.lib.utah.edu instruction leap infocycleprimer.htm Primer on the Information Cycle Category Research Category Information culture stub ... more details
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