The quasibiennialoscillation QBO is a Quasiperiodicity quasi periodic oscillation of the equator equatorial zonal and meridional zonal wind between easterlies and westerlies in the tropical stratosphere with a mean period of 28 to 29 months. The alternating wind regimes develop at the top of the lower stratosphere and propagate downwards at about convert 1 km 1 abbr on per month until they are dissipated at the tropical tropopause . Downward motion of the easterlies is usually more irregular than that of the westerlies. The amplitude of the easterly phase is about twice as strong as that of the westerly phase. At the top of the vertical QBO domain, easterlies dominate, while at the bottom, westerlies are more likely to be found. Theory The QBO was discovered in the 1950s, but its cause remained unclear for some time. Rawinsonde soundings showed that its phase was not related to the annual cycle , as is the case for all other stratospheric circulation patterns. In the 1970s it was recognized by Richard Lindzen and James Holton that the periodic wind reversal was driven by atmospheric wave s emanating from the tropical troposphere that travel upwards and are dissipated in the stratosphere by radiative cooling . The precise nature of the waves responsible for this effect was heavily debated in recent years, however, gravity wave s have come to be seen as a major contributor. Effects Effects of the QBO include mixing of stratospheric ozone by the secondary circulation caused by the QBO, modification of monsoon precipitation, and an influence on stratospheric circulation in northern hemisphere winter the sudden stratospheric warmings . Observation of the QBO with weather balloons The Free University of Berlin FU Berlin supplies a QBO data set that comprises rawinsonde observations ..., 489pp. Baldwin, M.P. et al. , 2001 The QuasiBiennialOscillation. Rev. Geophys. , 39 , 179&ndash ... Climate patterns de Quasi zweij hrige Schwingung fr Oscillationquasi biennale ja 2 no Kvasibiennal ... more details
refimprove date October 2009 In X ray astronomy , quasi periodic oscillation QPO is the manner in which the X ray light from an astronomical object flickers about certain frequencies. In these situations, the X rays are emitted near the inner edge of an accretion disk in which gas swirls onto a compact object such as a white dwarf , neutron star , or black hole . The QPO phenomenon promises to help astronomers understand the innermost regions of accretion disks and the masses, radii, and spin periods of white dwarfs, neutron stars, and black holes. QPOs could help test Albert Einstein s theory of general relativity which makes predictions that differ most from those of Newtonian gravity when the gravitational force is strongest or when rotation is fastest when a phenomenon called the Lense Thirring effect comes into play. However, the various explanations of QPOs remain controversial and the conclusions reached from their study remain provisional. A QPO is identified by performing a power spectrum of the time series of the X rays. A constant level of white noise is expected from the random variation of sampling the object s light. Systems that show QPOs sometimes also show nonperiodic noise that appears as a continuous curve in the power spectrum. A periodic pulsation appears in the power spectrum as a peak of power at exactly one frequency a Dirac delta function given a long enough observation . A QPO, on the other hand, appears as a broader peak, sometimes with a Lorentzian shape. What sort of variation with time could cause a QPO? For example, the power spectrum of an oscillating shot appears as a continuum of noise together with a QPO. An oscillating shot is a sinusoidal variation that starts suddenly and decays exponentially. A scenario in which oscillating shots cause ... time, the blob s mass decreases so that the oscillation decays. Often power spectra are formed ... give rise to a completely different kind of oscillation. Observations starting in 1996 with the Rossi ... more details
wiktionary Biennial means an event lasting for two years or occurring every two years. In particular, it can refer to Biennial plant , a plant which blooms in its second year and then dies Biennale disambiguation , various events See also biannual , describing an event that occurs twice a year or once every two years as biennial, depending on context. disambig no Biennal ... more details
For oscillator disambiguation oscillation mathematics Image Simple harmonic oscillator.gif right frame An undamped Harmonic oscillator Spring mass system spring mass system is an oscillatory system. Oscillation ... used more narrowly to mean a mechanical oscillation but sometimes is used to be synonymous with oscillation ... is added to the system, the point of equilibrium is shifted. The time taken for an oscillation ... of oscillation, namely the existence of an equilibrium and the presence of a restoring force which ... by oscillation decay of the harmonic oscillator. In addition, an oscillating system may be subject .... In this case the oscillation is said to be driven oscillations driven . Some systems can be excited ... an oscillation. Coupled oscillations The harmonic oscillator and the systems it models have ... special cases are the coupled oscillators where the energy alternates between two forms of oscillation. Well known is the Wilberforce pendulum , where the oscillation alternates between an elongation ... Crystal oscillator Loudspeaker Microphone Optical Laser oscillation of electromagnetic field ... optics . Biological Circadian rhythm Circadian oscillator Lotka Volterra equation Neural oscillation Oscillating gene Segmentation oscillator Human Neural oscillation Insulin release oscillations Puberty Endocrine perspective gonadotropin releasing hormone pulsations Pilot induced oscillation ... cycle Climate and geophysics Atlantic multidecadal oscillation Chandler wobble Climate oscillation El Ni o Southern Oscillation Pacific decadal oscillationQuasibiennialoscillation Astrophysics Neutron star oscillations Neutron stars Cyclic Model Quantum mechanical Neutrino oscillation s Chemical ... system Earthquake engineering Feedback Frequency Oscillation mathematics ColBreak Oscillator phase ... oscillation ColBreak Self oscillation Signal generator Strange attractor Structural stability Tuned ... Category Oscillation Category Earthquake engineering ar az Y r alanma be be x ... more details
For the prefix, see the Wiktionary entry wikt quasiquasi . Refimprove date November 2010 Infobox musical artist name Quasi image Quasi 1.JPG caption Quasi on stage in Chicago landscape yes background group or band alias origin Portland, Oregon Portland , Oregon , United States genre Indie rock years active 1993&ndash present label Kill Rock Stars , Domino Records Domino , Touch and Go Records Touch and Go , Up Records Up associated acts Sleater Kinney , Heatmiser , Stephen Malkmus and the Jicks website URL http www.theequasi.com current members Sam Coomes br Janet Weiss br Joanna Bolme Quasi is an United States American indie rock band formed in Portland, Oregon in 1993 by ex husband and wife Sam Coomes vocal s, guitar , Rocksichord , various Keyboard instrument keyboards and Janet Weiss vocals and drum set drums . Since 2007 the group has been a trio, following the addition of bass guitar bassist Joanna Bolme . ref http prod1.cmj.com articles display article.php?id 49547350 dead link date October 2011 ref History In 1990 , Coomes, Weiss, and Brad Pedinov formed the band Motorgoat. The band released two self released cassettes and one 7 single before dissolving in 1993. Quasi started recording as a Duet music duo in 1993. They played with various additional musicians in early live ... their next record. Although Coomes and Weiss remain busy with other bands, Quasi tours fairly regularly ... to that tour, Quasi announced that bassist Joanna Bolme, who had toured with Quasi in 2006 and plays ... they are beginning to work on new material following the end of touring. Quasi has been somewhat ... Quasi album Early Recordings 1996 Key Op Records Key Op rereleased in 2001 by Touch and Go ... Gets Dark 2006 Touch and Go Records Touch & Go , Domino Records Domino Quasi Self Boot 93 96 2006 ... Official Quasi home page MySpace theequasi Quasi Allmusic class artist id p202396 label Quasi ... Records artists nn Musikkgruppa Quasi ... more details
Image Whitney Biennial 2005 Day For Night.jpg thumb right 250px The banner of the 2006 Whitney Biennial Day For Night in front of the Whitney Museum of American Art . The Whitney Biennial is a wikt biennale ... may be included in the biennial has been subject to different interpretations by various biennial ... French of Minneapolis s Walker Art Center included a number of non citizens in their biennial ... biennial was in 1973. The Whitney show is generally regarded as one of the leading shows in the art ... Whitney Biennial Artists The fifty five artists, for 2010, were selected by curator Francesco Bonami ... was to combine both together in a biennial. The first Biennial was in 1973. In 1987 the show ... has been awarded to an artist exhibiting at the Biennial. The 2008 http www.whitney.org biennialBiennial opened on March 6, curated by Henriette Huldisch and Shamim M. Momin . That year brought big changes to the Biennial. Citation needed date November 2011 The exhibition took over the Park Avenue Armory as a space for performance and installation art. ref citation title The Best of the Biennial ... the best of the biennial accessdate 2008 04 15 ref Notes reflist See also Visual arts of the United States Art exhibition External links http www.whitney.org biennial Whitney Biennial Official Website ... Whitney Biennial ArtsEditor.com http www.artkrush.com mailer issue27 interview index.html Artkrush.com interview with 2006 Whitney Biennial co curator Philippe Vergne March 2006 http www.artnexus.com Notice View.aspx?DocumentID 17183 Review of 2006 Whitney Biennial http www.artseditor.com html features 0208 whitney.shtml Curatorial Charge the 2008 Whitney Biennial Part One ArtsEditor.com http www.artseditor.com html features 0308 whitney.shtml Time Stop Time the 2008 Whitney Biennial Part Two ArtsEditor.com http www.artinfo.com galleryguide exhibition 19588 6132 114510 2008 whitney biennial 2008 Whitney Biennial http preview.whitney.org Whitney Museum of American Art Main Page Category Art ... more details
The Herzliya Biennial of Contemporary Art in Hebrew , is an art biennial event held in the city of Herzliya , Israel . The first year that the biennial took place on September 23, 2007 with the theme of The Rear in Hebrew Ha Oref , and is scheduled to present the works of more than 70 Israeli artists in various locations in the center of Herzliya, such as underground warehouses, storage halls, the Herzliya museum , apartments, shops and bomb shelters . The first Herzliya Biennial curator is Joshua Simon and its directors are Yehuda Ben Ezra and Dalia Levin . Manifesto Inspired by other biennials such as the Gwangju Biennale , and by Israeli politics and surroundings, the opening manifesto of the Herzliya Biennial states The First Herzliya Biennial of Contemporary Art will focus on presentation of works by contemporary Israeli ... refugees. Notable Artists Some of the notable artists to present their works at the Herzliya Biennial ... . Reviews The Herzliya Biennial got mixed reviews in local and foreign press. Smadar Shefi from Haaretz http www.haaretz.com hasen spages 909285.html wrote that the name Biennial might be a bit too provincial to use for a city like Herzliya, whether it would be bi annal or not. Quote The strength of the biennial .... The biennial extended across 14 sites, in addition to the Herzliya Museum of Contemporary ... ShowFull said quote Is the biennial being used as a quick fix for the organizers and curatorial ... Levin and Joshua Simon. External links http www.herzliya biennial.com Herzliya Biennial website English Hebrew. http www.haaretz.co.il hasite spages 888346.html on the Herzliya Biennial preparations ... , Smadar Shefi s review of the Biennial from Haaretz, 02 10 2007 en and Hebrew 2007 09 26 http www.haaretz.co.il ... biennial of contemporary art will open in herzliya o.html Israel Travel on the Herzliya Biennial. http hebrish.ning.com profiles blog show?id 695945 3ABlogPost 3A1306 Hebrish At the Biennial Category ... more details
citations missing date November 2009 The Havana Biennial Art Exhibition takes place in Havana Cuba every two years, and principally aims at promoting the Third World contemporary art . The biennial is considered .... Since its first edition in 1984, the Biennial event has had central themes, among them tradition ..., using a wide variety of techniques and trends. History The first Havana Biennial was established ... Havana Biennial in 1986, the focus extended to include art from Africa and Asia , thus becoming the most important meeting place for artists from non Western countries. The Havana Biennial has not always been able to take place on during the two year rotation due to funding challenges. The 8th Biennial of 2002 did was delayed an entire year, resuming in November 2003. This Biennial was however noteworthy ... Sipus and Fabiana De Barros. At the beginning, the first two Biennial events included an awards ... Biennial 25th Anniversary Unsourced image removed File Havana biennial.jpg thumb right 300px 10th Havana Biennial 2009. deletable image caption With a central theme called Integration and resistance in the Globalization Era , the 10th Havana Biennial Art Exhibition took place from March 27 to April ... by artists from 44 nations. For the first time, the organisers decided to include in the Biennial western countries. In addition to fine arts exhibitions , the 10th Havana Biennial also included ... Biennial was made up by Margarita Gonz lez , Nelson Herrera Ysla , Jos Manuel Noceda , Ibis Hern ndez ... The 10th Havana Biennial on video http www.bienaldelahabana.cult.cu bienaldelahabana en boletin.php?nop 5 Havana Biennial Official Website http www.miamiherald.com entertainment arts visual arts story 982650.html Havana Biennial Overview by the Miami Herald http www.nytimes.com 2009 04 01 arts design 01bien.html? r 1&ref design Havana Biennial Article by the New York Times http www.environmentalgraffiti.com featured exclusive pictures havana biennial 2009 9490 Exclusive Pictures of the Havana ... more details
No footnotes date June 2011 The 01SJ Biennial is a multi disciplinary, multi venue event of visual and performing arts, the moving image, public art, and interactive digital media held biannually in San Jose, California San Jose , California , curated by ZER01 s artistic director Steve Dietz. History The inaugural Biennial took place in 2006 in conjunction with the 13th Inter Society for the Electronic Arts International Symposium on Electronic Art ISEA . It drew upwards of 20,000 attendees from around the globe and contributed 6 million to the local economy. The second 01SJ Biennial in 2008 drew 45,000 attendees, generated 9 million in revenue for the local economy, and established the Biennial as a significant new festival of contemporary art. The Biennial s primary venues are located in downtown San Jose but with each subsequent Biennial more satellite projects and parallel programs have been added in cities throughout Silicon Valley . 2010 The 2010 01SJ Biennial is slated for September 16 19, 2010 and is themed Build Your Own World , which posits that the future is not about what s next it s about what we can build to ensure that what s next matters. References cite news url http www.sfgate.com cgi bin article.cgi?f c a 2008 06 06 DDFQ11411D.DTL ixzz0Z8qb1mTf title 01SJ lends high tech San Jose an artsy air publisher San Francisco Chronicle date 2008 06 06 accessdate 2010 04 01 first Kenneth last Baker cite news url http www.sfgate.com cgi bin article.cgi?f c a 2008 06 02 ED6D110LB6.DTL title A festival grows in San Jose publisher San Francisco Chronicle date 2008 06 02 accessdate 2010 04 01 External links http 01sj.org 01SJ Biennial official site http zero1.org ZERO1 official site Category Arts festivals in the United States festival stub ... more details
Image Parsley Curled.jpg right thumb 200px Parsley is an example of a biennial plant. A biennial plant is a flowering plant that takes two years to complete its biological lifecycle. In the first year the plant grows leaves, stems, and roots vegetative structures , then it enters a period of dormancy over the colder months. Usually the stem remains very short and the leaves are low to the ground, forming a rosette. Many biennials require a cold treatment, or vernalization , before they will flower. During the next spring or summer, the stem of the biennial plant elongates greatly, or bolts . The plant then flowers, producing fruits and seed s before it finally dies. There are far fewer biennials than either perennial plants or annual plants . Under extreme climatic conditions, a biennial plant may complete its life cycle in a very short period of time e.g. three or four months instead of two years . This is quite common in vegetable or flower seedlings that were exposed to cold conditions, or vernalized, before they were planted in the ground. This behavior leads to many normally biennial plants being treated as annual plant annuals in some areas. Image Spring Flowers.JPG thumb The Sweet William Dwarf plant is a biennial plant ref citeweb url http davesgarden.com pf go 190 title Detailed ..., a plant s status as annual plant annual , biennial, or perennial plant perennial often ... biennial plant is grown in extremely harsh conditions, it is likely to be treated as an annual because ... may have highly successful seed propagation, giving it the appearance of being biennial or perennial. Some short lived perennials may appear to be biennial rather than perennial. True biennials flower only once, while many perennials will flower every year once mature. Examples of biennial ... Reflist DEFAULTSORT Biennial Plant Category Botanical nomenclature Category Plants Category Garden ... sq Bim t dyvje are simple Biennial sl Dvoletnica sv Bienner ta th ... more details
The Iowa Biennial Exhibition and Archive TIBEA began in 2004 as an international survey of contemporary miniature printmaking with its initial exhibition held at the University of Iowa in Iowa City , Iowa . Works Juried competition juried for the Art exhibition exhibition travel for exhibitions within the U.S. as well as internationally, with exhibitions in Cedar Rapids, Iowa and Riga , Latvia , to date. The Iowa Biennial Exhibition is a non profit endeavor that serves to support a collection of works accessioned within an open archive , The Iowa Biennial Exhibition Archive, while making the public collection available for academic education, research, museum s, artists, and print students. Works within the archive are used to promote a greater awareness of the uniqueness and beauty of the screenprint print , print media , and printmaking both traditional and non traditional . Submissions for works are accepted on even years beginning in January through April. The Iowa Biennial Exhibition is an all volunteer, non profit, cultural and research oriented event, and no profits are sought from its submissions and or participants, while submitted and accepted works will never be sold. Distinguished jurors invited to participate are established professionals from a diverse selection of art ... Exhibitions.htm Iowa Biennial exhibition received a 2007 ICKY award nomination &mdash ... 2007, The Iowa Biennial Exhibition & Archive merged its efforts with The Texas Biennial Exhibition & Archive to form The Americas Biennial Exhibition & Archive of Contemporary Prints, a non profit, all volunteer, fine arts endeavor. All works formerly entered into either The Iowa Biennial Exhibition & Archive or the Texas Biennial Exhibition & Archive have been accessioned into The Americas Biennial ... disambiguation Biennale External links http www.iowabiennial.org The Iowa Biennial Exhibition & Archive ... www.americasbiennial.org The Americas Biennial Exhibition & Archive Category Non profit organizations ... more details
primarysources date August 2009 The Coruche Biennial is a contemporary art exhibition, held every two years in Coruche , Portugal . It is centered mainly on plastic arts such as painting , drawing and mix techniques . It was founded by the Portuguese architect Carlos Janeiro in 2003. The Biennial of Coruche is organized by the Museum of Coruche and the Municipal Council of Coruche . With six years of existence, the Biennial of Coruche reached its 4th edition in October 2009. External links pt http bienaldecoruche.wordpress.com Official website en http coruchebiennial.wordpress.com Official website pt http www.museu coruche.org index.php?option com content&view article&id 128&Itemid 148 Informative site Category Art biennials es Bienal de Coruche it Biennale di Coruche pt Bienal de Coruche ... more details
multiple issues essay like March 2009 The Sharjah Biennial is a celebrated Festival cultural event in the Arab world . It is organised by the Sharjah Art Foundation. ref http www.sharjahart.org Sharjah Art Foundation ref Early days Since its inception in 1993, the event has formed a cultural bridge between artists, art institutions and organisations locally, regionally and internationally. Produced by the Department of Culture and Information in the Emirate of Sharjah emirate Sharjah , the Biennial now holds a key regional position in the production and presentation of art and in fostering experimentation. ref http www.sharjahbiennial.org Sharjah Biennial ref Role The Sharjah Biennial s track record clearly indicates its defining role as one of the few art institutions in the region it also spearheads a programme of support for artistic productions, access to their presentations and also actively assisting in their dissemination. This support, in light of the current developments in art and the incessant pursuit to define and re define the role of the now mushrooming biennials all over the world, needs to be sensibly extended to artists operating in the region. This support plays a vital role in the development and sustainability of a budding yet vibrant art movement . It also needs to reach out to those working in other parts of the world, who do not necessarily need the Biennial s support, but can positively contribute to the crucial dialogue among artists and practitioners, and the sharing of experiences in the progress of knowledge. References reflist coord missing United Arab Emirates Category Art festivals Category Art biennials Category Festivals in the United Arab Emirates Category Culture in Sharjah Category Visitor attractions in Sharjah ... more details
Unreferenced date December 2009 Orphan date December 2009 Biennial bearing or alternate bearing is a term used in pomology to refer to trees that have an irregular crop load from year to year. In the on year too much fruit is set, leading to small fruit size. Excess weight in the main branches can be too much for their mechanical resistance, causing them to break. Another major consequence is that flower induction will be lower, and the subsequent year will be off year too little fruit . The behavior could be due to plant hormones , particularly gibberellins produced in excess in the on years in the embryo s of the young fruit. It could also be caused by depletion of carbohydrate reserves in the tree. Biennial bearing is more common in certain fruit crop s like apple , pear , apricot and avocado , and almost non existing in grapes . Horticultural management This disorder can be reduced by winter pruning , and thinning of flowers and young fruit . DEFAULTSORT Biennial Bearing Category Agricultural terminology Category Fruit Category Gardening aids ca Contranyada de Alternanz Obstbau nds Alternanz Goornbo ... more details
web url http www.fact.co.uk news press press release liverpool biennial 2010 international 10 at fact ... Exhibition showcases new work by graduates from Fine Art schools in the UK. The Independents Biennial ... organisations. ref cite web url http www.independentsbiennial.org title Independents Liverpool Biennial The Independents Liverpool Biennial accessdate 19 August 2011 ref Liverpool Biennial also has ..., Richard. http www.culture24.org.uk art art24134 Stuckist s Punk Victorian gatecrashes Walker s Biennial ... accessdate 19 August 2011 title Tate Liverpool Past Exhibitions Liverpool Biennial ref Participating ... Year in Liverpool The theme of the Biennial s showpiece International 08 exhibition was Made Up . ref http www.biennial.com content Programme International1.aspx The fifth edition of Liverpool Biennial ... The 6th biennial in Liverpool ran from the 18th September 2010 to the 28th November 2010. It contained ... and Kirk eds Liverpool Biennial International Festival of Contemporary Art The Guide . Liverpool Biennial of Contemporary Art Ltd. ISBN 978 0 9536761 8 7 ref The visitor centre was located in the former ... also Commons category Liverpool Biennial Art exhibition Biennale disambiguation Notes and references reflist External links http www.biennial.com http www.artinliverpool.com biennial Dead link date ... more details
Infobox recurring event name Istanbul Biennial native name stanbul Bienali logo File LogoBienal.png logo caption image DO NOT include File part of image name different from above because of merger with Template Infobox festival imagesize frameless caption date dates also works, as merged from Template Infobox festival. Do not use both begins Mid September ends Mid November frequency Every two years odd years location Istanbul , Turkey years active first 1987 last 2011 participants attendence also works, as merged from Template Infobox festival. Do not use both genre Contemporary art budget patron stanbul K lt r Sanat Vakf IKSV website http www.iksv.org bienal english bienal.asp?cid 105 www.iksv.org bienal footnotes The International Istanbul Biennial is a contemporary art exhibition, held every two years in Istanbul , Turkey, since 1987. The biennial is organised by the stanbul Foundation for Culture and Arts. The Biennial aims to create a meeting point in stanbul in the field of visual arts between artists from diverse cultures and the audience. The ten biennials KSV has organised up to now have enabled the formation of an international cultural network between local and international art circles, artists, curators and art critics by bringing together new trends in contemporary art every two years. Considered as one of the most prestigious biennials alongside Venice, S o Paulo and Sydney, the International stanbul Biennial prefers an exhibition model which enables a dialogue ... sphere we are in, the stanbul Biennial plays an important role in the promotion of contemporary artists ... in 1987 and 1989, KSV decided to adapt a single curator system following the stanbul Biennial directed by Vasif Kortun in 1992. The Biennial was organised under the curatorship of Ren Block in 1995 ... 200px Installation from Istanbul 2005 Biennial 1987 Contemporary Art in Traditional Spaces General ... and Jens Hoffmann Participating artists at the 2005 Istanbul Biennial columns list 3 H seyin Bahri ... more details
Reciprocating oscillation is an action of oscillation where the oscillation vector varies its amplitude, frequency and or displacement Multiplicative inverse reciprocally . Note not to be confused with the reciprocal of the given sinusoidal function . For example, an oscillation that changes its amplitude and thereby, for example, its displacement every cycle to half that of its initial amplitude is said to be reciprocating. Note that the term reciprocating can be used loosely to describe such an action but usually is not because such an action can be defined easily as two separate oscilations. Instead it is more commonly used to describe an oscillation in which the second definable oscillation can be defined as a non rotary cycle as its displacement. Reciprocating oscillation is an action where an oscillating body reciprocates within the oscillation, where reciprocation is distinct from just another oscillation by only jumping up and down and not oscillating about an axis. Category Dynamical systems engineering stub ... more details
A climate oscillation or climate cycle is any recurring cyclical oscillation within global or regional climate , and is a type of climate pattern . These fluctuations in atmospheric temperature , sea surface temperature , precipitation or other parameters can be quasi periodic , often occurring on inter annual, multi annual, decadal, multidecadal, century wide, millennial or longer dynamical time scale timescale s. A prominent example is the El Ni o Southern Oscillation , involving sea surface temperatures along a strech of the equatorial Central and East Pacific Ocean and the western coast of tropical South America, but which affects climate worldwide. Records of past climate conditions are recovered through geology geological examination of proxy climate proxies , found in ice core glacier ice , sedimentology sea bed sediment , dendrochronology tree ring studies or otherwise. Examples Many oscillations on different time scales are hypothesized, although the causes may be unknown. They include the Ice age s the Atlantic Multidecadal Oscillation the El Ni o Southern Oscillation the Pacific decadal oscillation the Interdecadal Pacific Oscillation the Arctic oscillation the North Atlantic Oscillation the North Pacific Oscillation the Hale cycle may be discernable in climate records see Solar variation the 60 year climate cycle recorded in many ancient calendars, as per Scafetta 2010 Anomalies in oscillations sometimes occur when they coincide, as in the Arctic dipole anomaly a combination of the Arctic and North Atlantic oscillations and the longer term Younger Dryas , a sudden ... of climatic temperature change and oceanic extinctions. Another longer term near millenial oscillation ... Radiative forcing s and other factors in a climate oscillation must obey the laws of atmospheric ... the Piora Oscillation the Middle Bronze Age Cold Epoch the Iron Age Cold Epoch cooling during ... dynamics Category Climatology Category Climate change Category Climate history Category Oscillation ... more details
Electronic oscillation is the continuous recurrence of the same electricity electrical periodic waveform . ref http dictionary.reference.com browse oscillation accessed April 01, 2007 . ref The recurrence may be in the form of a varying voltage or a varying electric current current . The waveform may be sine wave sinusoidal or some other shape when its magnitude is plotted against the duration of its cycle. Electronic oscillation may be intentionally caused, as in devices designed as oscillation oscillators , or it may be the result of unintentional positive feedback from the output of an electronic device to its input. The latter appears often in feedback amplifiers such as operational amplifier s that do not have sufficient Bode plot Gain margin and phase margin gain or phase margins . In this case, the oscillation often interferes with or compromises the amplifier s intended function. References Reflist refimprove date March 2008 Category Electronics terms Category Electronic engineering ... more details
otheruses Oscillation differential equation Image LimSup.svg right thumb 300px Oscillation of a sequence ... , oscillation is the behaviour of a sequence of real number s or a real valued function ... diverge to or that is, oscillation is the failure to have a Limit mathematics limit , and is also a quantitative measure for that. Oscillation is defined as the difference possibly between the limit ... forms or . For a sequence, the oscillation is defined at infinity, it is zero if and only if the sequence converges. For a function, the oscillation is defined at every limit point in , of the domain ... &fnof a to &fnof b infinitely many times, and does not converge. 1 x has oscillation at x 0, and oscillation 0 at other finite x and at and . sin 1 x the topologist s sine curve has oscillation 2 at x 0, and 0 elsewhere. sin x has oscillation 0 at every finite x , and 2 at and . The sequence 1, &minus 1, 1, &minus 1, 1, &minus 1, ... has oscillation 2. In the last example the sequence is Frequency periodic , and any sequence that is periodic without being constant will have non zero oscillation. However, non zero oscillation does not usually indicate periodicity. Geometrically, the graph of an oscillating ... Oscillation can be used to define continuous function continuity of a function , and is easily ... a function is continuous at a point x sub 0 sub if and only if the oscillation is zero ref http ... A benefit of this definition is that it quantifies discontinuity the oscillation gives how much the function ... discontinuity, the distance that the value of the function is off by is the oscillation in a jump discontinuity, the size of the jump is the oscillation assuming that the value at the point lies between these limits from the two sides in an essential discontinuity, oscillation measures the failure ... and continuous points the continuous points are the intersection of the sets where the oscillation ... A More Advanced Look at the Existence of the Proper Riemann Integral , pp. 171 177 ref The oscillation ... more details
of roots of the Wronski determinant of two solutions is known as relative oscillation theory. See also Classical results in oscillation theory are Kneser theorem Sturm Picone comparison theorem ..., Academic Press. Gesztesy, F. Simon, B. Teschl, G. Zeros of the Wronskian and renormalized oscillation theory, Am. J. Math. 118, 571 594 1996 . Kreith, K. 1973 . Oscillation Theory, Lecture Notes in Mathematics 324, Springer. Kr ger, H Teschl G. Relative oscillation theory, weighted zeros of the Wronskian ... 186. Swanson, C.A. 1968 . Comparison and Oscillation Theory of Linear Differential Equations, Academic ... Operators, Lecture Notes in Mathematics 1258, Springer. DEFAULTSORT Oscillation Differential Equation ... more details
The Antarctic oscillation AAO, to distinguish it from the Arctic oscillation or AO is a low frequency mode of variability mode of atmospheric variability of the southern hemisphere. It is also known as the Southern Annular Mode SAM or Southern Hemisphere Annular Mode SHAM . See also North Atlantic oscillation Arctic oscillation Pacific decadal oscillation Anticyclone John Michael Wallace External links http www.cpc.ncep.noaa.gov products precip CWlink daily ao index aao aao.loading.shtml http stratus.astr.ucl.ac.be textbook pdf Chapter 5.pdf chapter 5.2.3 http www.new.dpi.vic.gov.au agriculture environment and community climate understanding weather and climate climatedogs sam Animation of Southern Annular Mode in Victoria, Australia http stratus.astr.ucl.ac.be textbook chapter5 node6.html The Southern Annular Mode Introduction to climate dynamics and climate modelling, Université catholique de Louvain Climate oscillations Category Climate Category Climate patterns Category Environment of Antarctica climate stub es Oscilaci n ant rtica ja pt Oscila o ant rtica ... more details
cleanup linkrot date August 2011 Infobox album See Wikipedia WikiProject Albums Name Oscillation Isolator Type Album Artist Fire Zuave Cover Released 2009 Recorded 2008 2009 Genre Americana music Americana Length ?? ?? Label unsigned Producer Reviews Last Album This Album Oscillation Isolator br 2009 Next Album Oscillation Isolator is the second album by fire Zuave . ref http www.polyvinylrecords.com store index.php?id 851 ref Released in 2009, fire Zuave continues to feature cover artwork by David Barnes artist David Barnes . Track listing August Air Down By the Sea Harmonica Orchid Prison Break Trailor Theme 45 Caliber Will You Ever Understand I m Not Afraid of Who I Am By the Side of a Mountain References reflist Category 2009 albums ... more details
refimprove date June 2009 Pogo oscillation is a potentially dangerous type of self excited combustion oscillation in liquid fuel rocket engine s. ref name Vibrationdata http www.vibrationdata.com Newsletters October2008 NL.pdf Apollo 13 Pogo Oscillation , Tom Irvine, Vibrationdata Newsletter, October 2008, pp. 2 6, retrieve on 18 06 2009 ref This oscillation results in variations of thrust from the engines, causing variations of acceleration on the rocket s structure, giving variations in fuel pressure and flow rate. Pogo places stress on the frame of the vehicle which can be severe. Although the term is frequently written POGO, it is not an acronym , but in fact a reference to the bouncing of a pogo stick . ref name Vibrationdata ref http www.hq.nasa.gov office pao History SP 350 ch 3 5.html The Perils of Pogo ref Origin In general, pogo oscillation occurs when a surge in engine pressure increases back pressure against the fuel coming into the engine, reducing engine pressure, causing more fuel to come in and increasing engine pressure again. Flexing of fuel pipes can also induce fluctuations in fuel pressure. ref http www.princeton.edu stengel MAE342Lecture4.pdf Launch Vehicle Design ... to match a Resonance resonance frequency of the rocket then dangerous oscillation s can occur ... pogo oscillation will occur is when the engine is moving upward with fluctuating speed. Owing ... famous pogo oscillation was in the Saturn V first stage, S IC , caused by the cruciform thrust ... F 1 rocket engine F 1 engine caused the structure to bend upwards. The pogo oscillation occurred .... At the other end of the oscillation, the fuel line was compressed, increasing fuel flow causing a sinusoidal thrust oscillation during the first stage ascent. Hazard If the oscillation is left unchecked ... vibration analysis methods can account for the pogo oscillation to test that it is far away from the vehicle ... Supressors DEFAULTSORT Pogo Oscillation Category Spacecraft propulsion ca Efecte pogo cs Pogo oscilace ... more details
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