For oscillator disambiguation oscillation mathematics File 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 ... 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 of a vertical ... Crystal oscillator Loudspeaker Microphone Optical Laser oscillation of electromagnetic field with frequency ... 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 oscillation Quasi biennial oscillation 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
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
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
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
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
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 cite web url http www.polyvinylrecords.com store index.php?id 851 title Polyvinyl Record Co. Fire Zuave Oscillation Isolator publisher Polyvinylrecords.com date 2009 04 07 accessdate 2012 03 04 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
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
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, retrieved 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 ... resonance frequency of the rocket then dangerous oscillation s can occur through positive feedback , which can in extreme cases tear the vehicle apart. Another situation in which pogo oscillation ... Rocketdyne journal Threshold accessdate 2009 09 11 ref The most famous pogo oscillation was in the Saturn ... the structure to bend upwards. The pogo oscillation occurred when this structure sprang back, lengthening ... reducing the fuel flow and thus reducing thrust. 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, failures can result. One case ... for the pogo oscillation to test that it is far away from the vehicle s resonant frequencies. Suppression ... NASA Technical Paper on Flexible Propellant Lines Including Pogo Supressors DEFAULTSORT Pogo Oscillation ... more details
Image Arctic Oscillation.svg thumb 250px right Arctic Oscillation time series for the extended DJFM winter season 1899 2011. The Arctic oscillation AO or Northern Annular Mode Northern Hemisphere Annular ... jisao.washington.edu data aots Arctic Oscillation AO time series, 1899 June 2002 ref The AO is believed ... and negative phases of the Arctic Oscillation The degree to which Arctic air penetrates into middle ... Michael Wallace year 1998 month title The Arctic oscillation signature in the wintertime geopotential ... 98GL00950 bibcode 1998GeoRL..25.1297T ref The North Atlantic oscillation NAO is a close relative ... 014&issue 16&page 3495 Ambaum et al. Arctic Oscillation or North Atlantic Oscillation? ref Over most of the past century, the Arctic Oscillation alternated between its positive and negative phases. Starting in the 1970s the oscillation has trended to more of a positive phase when averaged using a 60 day running mean, though it has trended to a more neutral state in the last decade. The oscillation ... ao index.html title CPC Monitoring & Data Daily Arctic Oscillation Index format work accessdate 2012 ... title The Arctic Oscillation and Arctic Weather Patterns format work accessdate 2012 01 29 ref The National ... as far into the middle of North America as it would during the negative phase of the oscillation ... invoking the Arctic Oscillation in their official public explanations for extremes of weather. The following ... Center State of the Climate December 2010 which uses the phrase negative Arctic Oscillation four times ... Oscillation, which is a climate pattern that influences weather in the Northern Hemisphere. A very ... Oscillation. A large snow storm and frigid temperatures affected much of the Midwest United ... A further, quite graphic illustration of the effects of the negative phase of the oscillation occurred in February 2010. In that month, the Arctic Oscillation reached its most negative monthly mean value .... It is by no means a simple, one to one equivalence. An extreme Arctic Oscillation does ... more details
Parasitic oscillation is an undesirable oscillation caused by feedback . The problem occurs notably in RF power amplifier RF ref cite book last Whitaker first Jerry C. title The electronics handbook year 2005 publisher CRC Press isbn 9780849318894 pages 404 url http books.google.com books?id FdSQSAC3 EwC&pg PA404 ref , audio amplifier audio , and other electronic amplifier s ref cite book last Weber first Gerald title A Desktop Reference of Hip Vintage Guitar Amps year 1994 publisher Hal Leonard isbn 9780964106000 pages 220 url http books.google.com books?id fvUVBP3wW1gC&pg PA220 ref as well as in digital signal processing . ref cite book last Wanhammar first Lars title DSP integrated circuits year 1999 publisher Academic Press isbn 9780127345307 pages 188 url http books.google.com books?id k bbNlEyFSgC&pg PA188 ref It is one of the fundamental issues addressed by control theory . ref Richard R Spencer & Ghausi MS 2003 . Introduction to electronic circuit design. Upper Saddle River NJ Prentice Hall Pearson Education. pp. 661. ISBN 0 201 36183 3. http worldcat.org isbn 0 201 36183 3. ref ref Araki, M., PID Control, http www.eolss.net ebooks Sample 20Chapters C18 E6 43 03 03.pdf ref ref P. Horowitz & W. Hill The Art of Electronics Cambridge University Press 1980 Chapter 3, relating to operational amplifiers. ref Parasitic oscillation is undesirable for several reasons. The oscillations ... oscillation may generate enough power to damage connected Loudspeaker speakers . A circuit that is oscillating ... pulses and count erratically. Causes of parasitic oscillation Parasitic oscillation in an amplifier ..., impedance in the power supply can couple input to output and cause oscillation. When a common power ... to address the problem of parasitic oscillation in Servomechanism servo control systems &ndash .... The Nyquist stability criterion for oscillation is that the product of the stage gain multiplied ... measures are used to prevent parasitic oscillation. Amplifier circuits are laid out so that input ... 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 millennial 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 ... Category Climatology Category Climate history Category Oscillation et Kliimats klid ja ... more details
File Holocene Temperature Variations.png thumb 300px The Piora Oscillation was an abrupt cold and wet period in the climate history of the Holocene Epoch it is generally dated to the period of c. 3200 to 2900 BCE . ref http www.news about space.org story 2409.html Space and Earth Science News article summarizes evidence for sudden global cooling 5.2K years BP ref Some researchers associate the Piora Oscillation with the end of the Atlantic climate regime, and the start of the Sub Boreal, in the Blytt Sernander sequence of Holocene climates. The spatial extent of the change is unclear it does not show up as a major, or even identifial, event in hemispheric temperature reconstructions The phenomenon is named after the Val Piora or Piora Valley in Switzerland, where it was first detected some of the most dramatic evidence of the Piora Oscillation comes from the region of the Alps . ref Lamb, pp. 124, 128, 143. ref Glaciers advanced in the Alps, apparently for the first time since the Holocene climatic optimum the Alpine tree line dropped by 100 meters. Yet the climate change extended far beyond the Alps and Europe. It affected what is now the New England region of North America, where tsuga hemlock and elm trees suffered a dramatic decline Citation needed date October 2009 . Similar evidence comes from California and elsewhere some changes in flora proved permanent Citation needed date October 2009 . In the Middle East, the surface of the Dead Sea rose nearly 100 meters 300 feet , then receded to a more usual level. A few commentators have associated the climate changes of this period with the end of the Uruk period , as a Dark Ages in history Dark Age associated with the floods .... ref The Piora Oscillation has also been linked to the domestication of the horse. In Central Asia ... weather in the central Sahara. The cause or causes of the Piora Oscillation are debated. A Greenland ... impact event . Other authorities associate the Piora Oscillation with other comparable events ... more details
refimprove date April 2011 The Aller d period was a warm and moist global interstadial that occurred at the end of the last glacial period . The Aller d oscillation raised temperatures in the northern Atlantic region to almost present day levels , before they declined again in the succeeding Younger Dryas period, which was followed by the present interglacial period. In some regions, especially in northern Eurasia , there is evidence for a cold period known as the Older Dryas interrupting the interstadial. In such regions the shorter oscillation ending with the Older Dryas is known as the B lling oscillation , and the Aller d period is the interstadial following the Older Dryas. The Aller d period was named after a type site in Aller d municipality in Sj lland , Denmark near Copenhagen , where deposits created during the period were first identified in work published in 1901 by Nikolaj Hartz Hartz and Milthers. This Blytt Sernander period corresponds to Pollen zone II. Dating The start of the Aller d depends on whether an Older Dryas is present and how much time is to be allotted to the latter. A conventional date of 14,000 BP is typical. Roberts 1998 uses 13,000 BP for the end of the period. The Greenland Oxygen isotope record shows the warming identified with the Aller d to be after about 14,100 BP and before about 12,900 BP. C 14 dates from an excavation on the shore of Lake Neuchatel , Switzerland , furnish a date of 14,000 BP, calibrated, for the start of the Aller d. Pollen cores from Berezina plain, Belarus , give 11,800 10,900 BP uncal. Various researchers have similar ranges 12,000 11,000, 11,700 11,000, etc. They all seem to roughly concur. The interstadial ended abruptly with a cold period that reduced temperatures back to near glacial levels within a decade. ref Nicholas Wade Wade, Nicholas , Before the Dawn , Penguin Press, 2006. pp. 123 ref The Aller d occurred during the last interstadial of the Pleistocene the Windermere of Great Britain Britain , th ... more details
time, since computation in backward time may localize unstable oscillation. Self exciting attractor ... method and to choose initial data in an attraction domain of the hidden oscillation which does ... computation of oscillating solution starting oscillation can be obtained analytically, and then the transformation of this starting oscillation in the transition from one system to another is followed ... Absolute stability.pdf Analytical numerical localization of hidden oscillation in counterexamples ... more details
More footnotes date April 2010 Neutrino oscillation is a quantum mechanics quantum mechanical phenomenon ... of measuring a particular flavor for a neutrino varies periodically as it propagates. Neutrino oscillation ... oscillation has been collected from many sources, over a wide range of neutrino energies and with many ... Solar neutrino oscillation The first experiment that detected the effects of neutrino oscillation was Raymond ... and water Cherenkov radiation Cherenkov detectors confirmed the deficit, but neutrino oscillation .... At energies above 5 MeV, solar neutrino oscillation actually takes place in the Sun through ... the vacuum oscillation described later in this article. Atmospheric neutrino oscillation Large detectors ... precise measurement of neutrino oscillation in an energy range of hundreds of MeV to a few TeV, and with a baseline of the diameter of the Earth . Reactor neutrino oscillation Many experiments have searched for oscillation of electron antimatter anti neutrinos produced at nuclear reactors . The KamLAND experiment, started in 2002, has made a high precision observation of reactor neutrino oscillation ... are currently measuring reactor neutrino oscillation at a baseline of a few kilometers Double ... of the parameter sub 13 sub . Beam neutrino oscillation Neutrino beams produced at a particle accelerator ... which study the same neutrino oscillations which take place in atmospheric neutrino oscillation ... Super K experiments. The controversial observation of beam neutrino oscillation at the Liquid ... a baseline of 810 km. Theory Neutrino oscillation arises from a mixture between the flavor ... between the neutrinos are small that the coherence length for neutrino oscillation is so long, making ... matrix Main Pontecorvo Maki Nakagawa Sakata matrix The idea of neutrino oscillation was first put ... antimatter oscillation has not been observed, this idea formed the conceptual foundation for the quantitative theory of neutrino flavor oscillation, which was first developed by Maki, Nakagawa ... more details
The B lling oscillation was a warm interstadial period between the Oldest Dryas and Older Dryas stadial s, at the end of the last glacial period . It is named after a peat sequence discovered at B lling lake , central Jutland . It is used to describe a period of time in relation to Pollen zone Ib in regions where the Older Dryas is not not DOUBLE NEGATIVE TYPO?? detected in climatological evidence, the B lling Aller d is considered a single interstadial period. Dates The beginning of the B lling is also the high resolution date for the sharp temperature rise marking the end of the Oldest Dryas at 14,670 Before Present BP . Roberts 1998 uses 15,000. A range of 14,650 14,000 BP calibrated has been assigned to the B lling layer of the excavation at Lake Neuch tel , Switzerland , 1992 1993. The Oxygen isotope record from Greenland ice includes the B lling warm peak between 14,600 and 14,100 BP. Most of the recent dates available fall within a few hundred years of these. Flora Of the two periods, B lling and Aller d Oscillation Aller d , B lling is the warmer and came on more suddenly. During it sea level rose more than 100 m due to glacial melt. Ice uncovered large parts of north Europe and temperate forests covered Europe from 29 deg. to 41 deg. north latitude . After some pioneer vegetation, such as Salix polaris and Dryas octopetala , hardwoods, such as Quercus , and softwoods, Betula and Pinus , spread northward for a brief few hundred years. Fauna During this time late Pleistocene animals spread northward from refugia in the three peninsulas, Spain, Italy and the Balkans . Geneticists can identify the general location by studying degrees of consanguinity in the modern animals of Europe. The hunting camps of ancient humans remain a major source of fauna animals fauna l fossil s. Animals hunted by man are predominantly the big game mammals reindeer , horse , saiga , antelope ... of the Hamburgian and Federmesser Cultures Geological history p c DEFAULTSORT Bolling Oscillation ... more details
eee Image Hunting oscillation section ja 150px.gif 150px br Image Hunting oscillation plan ja 150px.gif 150px br div Hunting oscillation is an oscillation , usually unwanted, about an Mechanical ... see hunt v. 7b an undesirable oscillation about an equilibrium speed, position, or state. ref The expression came into use in the 19th century and describes how a system self exciting oscillation ... A classical hunting oscillation is a swaying motion of a railway vehicle caused by the Adhesion ... forces and inertial forces become comparable in magnitude and the oscillation begins at a critical ... radius Image NewTurnRadius.png thumb centre 300px math frac 1 R frac 2ky rd math where d ... of y with respect to distance along the track math frac d 2y dx 2 frac 1 R math It follows that the trajectory along the track is governed by the equation math frac d 2y dx 2 frac 2k rd y math This is a simple ... analysis implies that trains sway from side to side all the time. In fact, this oscillation is Damping ... theta math is given by math theta frac dy dx math Hence math frac d theta dx frac d 2y dx 2 frac 2k rd y math math frac d 2 theta dx 2 frac 2k rd frac dy dx frac 2k rd theta math The angular deflection ... using the speed of the vehicle U, which is assumed constant math frac d dt U frac d dx math The angular acceleration of the axle in yaw is math frac d 2 theta dt 2 U 2 frac 2k rd theta math The inertial moment ignoring gyroscopic effects is math Fd C frac d 2 theta dt 2 math where F is the force acting ... should be able to derive the critical speed. Let math omega frac d theta dt math Using the operator math omega frac dd theta frac d dt math the angular acceleration equation may be expressed in terms of the angular velocity in yaw math omega math math omega frac d omega d theta U 2 frac 2k rd theta ... of the axle is lowered. The distance between the support points increases to math frac d cos theta d 1 frac 1 2 theta 2 math to second order of small quantities . the displacement of the support ... more details
in astrophysics . Since the frequency is independent of the wavelength , these oscillation ... relation . If the spatial scale is large compared to the Debye length , the oscillation s are only ... . See also Waves in plasmas plasmon Surface plasmon resonance Upper hybrid oscillation , in particular ... more details
Neural oscillation is rhythmic or repetitive neural activity in the central nervous system . Neural tissue can generate oscillations oscillatory activity in many ways, driven either by mechanisms localized within individual neurons or by interactions between neurons. In individual neurons, oscillations can appear either as oscillations in membrane potential or as rhythmic patterns of action potentials , which then produce oscillatory activation of post synaptic potential post synaptic neurons. At the level of neural ensemble s, synchronized activity of large numbers of neurons can give rise to macroscopic scale macroscopic oscillations, which can be observed in the electroencephalography electroencephalogram EEG . Oscillatory activity in groups of neurons generally arise from feedback connections between the neurons that result in the synchronization of their firing patterns. The interaction between neurons can give rise to oscillations at a different frequency than the firing frequency of individual neurons. A well known example of macroscopic neural oscillations is alpha wave alpha ... LFPs . Quantitative models can estimate the strength of neural oscillation in recorded data. ref cite journal author Mure an RC, Jurju OF, Moca VV, Singer W, Nikoli D title The Oscillation Score An Efficient Method for Estimating Oscillation Strength in Neuronal Activity journal Journal of Neurophysiology ... year 2009 volume 459 issue 7247 pages 663 U63 doi 10.1038 nature08002 ref Macroscopic Neural oscillation ... resonance thalamocortical oscillation , involve time delays due to the finite Action potential ... of a limit cycle oscillation in that the frequency of beats varies widely, while each individual ... journal author Marder E, Bucher D title Central pattern generators and the control of rhythmic movements .... ref cite journal author Burns SP, Xing D, Shapley RM year 2011 title Is gamma band activity in the local ... of the motor cortex. ref cite journal author Rubino, D Robbins, KA Hatsopoulos, NG title Propagating ... more details
Unreferenced date December 2009 An upper hybrid oscillation is a mode of oscillation of a magnetized Plasma physics plasma . It consists of a longitudinal wave longitudinal motion of the electrons perpendicular to the magnetic field with the dispersion relation math omega 2 omega pe 2 omega ce 2 3 k 2 v mathrm e,th 2 math , where in Centimetre gram second system of units cgs units math omega pe 4 pi n ee 2 m e 1 2 math is the electron plasma frequency, and math omega ce eB m ec math is the electron cyclotron frequency. This oscillation is closely related to the plasma oscillation found in unmagnetized plasmas or parallel to the magnetic field, where the sub pe sub term arises from the electrostatic restoring force and the 3 k v sub e,th sub term arises from the restoring force of electron pressure. In the upper hybrid oscillation there is an additional restoring force due to the Lorentz force . Consider a plane wave where all perturbed quantities vary as exp i kx t . If the displacement in the direction of propagation is sub x sub , then v sub x sub i &omega &delta f sub y sub nev sub x sub B sub z sub c i &omega neB sub z sub c &delta v sub y sub f sub y sub i &omega nm eB sub z sub mc &delta f sub x sub nev sub y sub B sub z sub c nm eB sub z sub mc &delta a sub x sub &omega sub ce sub &delta Thus the perpendicular magnetic field effectively provides a harmonic oscillator ... a lower hybrid frequency and lower hybrid oscillation s. For propagation at angles oblique to the magnetic ... frequency, then the upper hybrid oscillation transforms continuously into the plasma oscillation. The frequency ... of the mode related to the upper hybrid oscillation remains above the cyclotron frequency, and the mode related to the plasma oscillation remains below the plasma frequency. In particular, the frequencies ... 2 omega c omega p right 2 right math See also Plasma oscillation Lower hybrid oscillation List of plasma physics articles DEFAULTSORT Upper Hybrid Oscillation Category Waves in plasmas ... more details
about the Scottish band the climate phenomenon North Atlantic Oscillation Infobox musical artist See Wikipedia WikiProject Musicians name North Atlantic Oscillation image IMG 1492 crop sm.jpg caption Sam Healy from the band playing live in Leeds , UK. image size background group or band alias origin Edinburgh , Scotland instrument genre New prog Post progressive rock br Electronica occupation years active 2005 present label Kscope associated acts website current members Sam Healy vocals, guitars, keyboards br Ben Martin drums, programming br Chris Howard bass, bass synth, backing vocals past members Bill Walsh bass, bass synth, backing vocals, remixes notable instruments North Atlantic Oscillation are a New prog post progressive rock and electronica band from Edinburgh , Scotland . They are signed ... to Edinburgh to study. ref name kscope cite web url http www.kscopemusic.com north atlantic oscillation title North Atlantic Oscillation publisher Kscope last Myers first Ben date 2009 09 accessdate ... Atlantic Oscillation Grappling Hooks Review publisher BBC date 2010 03 17 accessdate 2010 04 13 ref ... title On the Radar North Atlantic Oscillation publisher Scotsman.com last Hamilton ... naoband title North Atlantic Oscillation on Myspace accessdate 2010 04 14 ref The band are named after the North Atlantic Oscillation , a fluctuating change in the atmospheric pressure differential ... reviews north atlantic oscillation 11152 title North Atlantic Oscillation Album Review publisher ... atlantic oscillation callsigns ep title North Atlantic Oscillation Callsigns EP publisher The Skinny ... releases 15221 reviews 4139446 title North Atlantic Oscillation Grappling Hooks publisher ... oscillation E2 80 93 album of the week on radio one publisher Kscope title North Atlantic Oscillation ... Official site http www.kscopemusic.com north atlantic oscillation North Atlantic Oscillation at Kscope References reflist DEFAULTSORT North Atlantic Oscillation Category Scottish rock music groups ... more details
Refimprove date April 2009 A lower hybrid oscillation is a longitudinal wave longitudinal oscillation of ions and electrons in a magnetized Plasma physics plasma . The direction of propagation must be very nearly perpendicular to the stationary magnetic field, within about m sub e sub m sub i sub radian s. Otherwise the electrons can move along the field lines fast enough to Electric field screening shield the oscillations in potential, in which case an electrostatic ion cyclotron wave results. The frequency of oscillation is math omega Omega i Omega e 1 omega pi 2 1 2 math , where sub i sub is the ion cyclotron frequency, sub e sub is the electron cyclotron frequency and sub pi sub is the ion plasma frequency . This is the lower hybrid frequency , so called because it is a hybrid , or mixture, of two frequencies. There are also an upper hybrid frequency and upper hybrid oscillation . The lower hybrid oscillation is unusual in that the ion and electron masses play an equally important role. This mode is relatively unimportant in practice because the necessary precise orientation relative to the magnetic field is seldom achieved. Exceptions are the use of lower hybrid waves to heat fusion power fusion plasmas and the lower hybrid drift instability, which was thought to be an important determinant of transport in the Field Reversed Configuration but was not found experimentally ref Citation last Carlson first Arthur W. title A search for lower hybrid drift fluctuations in a field reversed configuration using CO sub 2 sub heterodyne scattering journal Physics of Fluids volume 30 issue 5 pages 1497 1509 year 1987 doi 10.1063 1.866263 ref . See also Electrostatic ion cyclotron wave Waves in plasmas Ion acoustic wave Upper hybrid oscillation List of plasma physics articles References Reflist Category Waves in plasmas ... more details
Infobox album See Wikipedia WikiProject Albums Name Ubiquitous Frequency Oscillation UFO Type studio Artist Joel Kanning Cover UFO cover.jpg Alt Released July 02, 2009 Recorded Genre New Age music New Age , Chillout , World music World Length 54 10 Label Producer Joel Kanning Last album Nobis album Nobis br 2001 This album Ubiquitous Frequency Oscillation UFO br 2009 Next album Album ratings rev1 NewAgeMusic.nu rev1score favorable ref name NAM cite web first BT last Fasmer title The UFO Enigma url http www.newagemusic.nu ?p 1715 publisher NewAgeMusic.nu accessdate 4 October 2009 ref Automatically generated by DASHBot Ubiquitous Frequency Oscillation UFO is the second studio album by Joel Kanning . The album was self released July 2, 2009, as a digital release through services such as iTunes Store iTunes , Amazon MP3 and Rhapsody online music service Rhapsody , and a physical release through CD Baby . Track listing The Visitor 2 47 Travelers 3 40 Ashima 4 53 Dancing In The Mist 4 38 Twilight 4 47 One World 3 19 Messages From Above 4 42 Auricle 4 23 L amour Sonique 5 02 In Excelsis 5 46 Across Cultures 3 54 Drifting 6 24 Personnel Joel Kanning keyboards, guitar, composition, engineering & production. Tami Kanning vocals & lyrics Messages From Above , Auricle , Drifting . References references See also http music.joelkanning.com music Joel Kanning Music music.joelkanning.com http www.discogs.com Joel Kanning Ubiquitous Frequency Oscillation UFO release 1968580 Joel Kanning Ubiquitous Frequency Oscillation UFO at Discogs DEFAULTSORT Ubiquitous Frequency Oscillation Ufo Category 2009 albums ... more details
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