
	Where results make sense

Topic: Stochastic Resonance

In the News (Sat 28 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Stochastic Resonance in Perception (Site not responding. Last check: 2007-10-14)
		A model for stochastic resonance-type behavior in sensory perception
		Recently it was found that noise could help improve human detection of sensory stimuli via stochastic resonance-type behavior.
		Specifically, the ability of an individual to detect a weak tactile stimulus could be enhanced by adding a certain amount of noise.
	brahms.cpmc.columbia.edu /publications/sr.html (130 words)

	Adaptive Stochastic Resonance - Mitaim, Kosko (ResearchIndex)
		5 Stochastic resonance in a superconducting loop with Josephso..
		2 Stochastic resonance and nonlinear response in a dissipative..
		2 Stochastic resonance and nonlinear response in double-quantu..
	citeseer.ist.psu.edu /mitaim98adaptive.html (2374 words)

	Quantum Mathematics (Site not responding. Last check: 2007-10-14)
		Quantum Theory and Its Stochastic Limit by Luigi Accardi, Igor Volovich, Yun Gang Lu (Springer Verlag) The subject of this book is a new mathematical technique, the stochastic limit developed for solving nonlinear problems in quantum theory involving systems with infinitely many degrees of freedom (typically quantum fields or gases in the thermodynamic limit).
		The stochastic limit takes inspiration from the pioneering studies of quantum dynamical systems by Fermi, Bogoliubov, van Hove and Prigogine, and its main goal is a detailed qualitative study of quantum dynamics, in analogy to Poincare's qualitative study of classical dynamics.
		Stochastic bosonization (in dimensions strictly higher than two) is a particular case of the block principle for fermions.
	www.wordtrade.com /science/mathematics/quantummath.htm (2115 words)

	Stochastic Resonance and Rasch Measurement, W Fisher Jr.
		Stochastic Resonance and Rasch Measurement, W Fisher Jr.
		Stochastic resonance occurs when faint and hard to detect signals are amplified by additional input received from surrounding background noise, paradoxically making them more easily detected than if the background was free of noise.
		The meaningfulness and resolution provided by stochastic resonance follows from the relation between part and whole, or text and context, that enables background noise to amplify an otherwise faint signal.
	www.rasch.org /rmt/rmt54k.htm (870 words)

	Uspekhi Fizicheskikh Nauk, vol. 169, issue 1, 1999 (Physics-Uspekhi, vol. 42, issue 1, 1999) (Site not responding. Last check: 2007-10-14)
		Stochastic resonance (SR) is one of the bright examples of noise-induced transitions in nonlinear systems driven by an information signal and noise simultaneously.
		The effects of SR and stochastic synchronization of the ensembles of stochastic resonators are investigated both without coupling between the elements and in the case of their interaction.
		The concept of stochastic resonance (SR) was introduced in 1981 in the study of ice-age periodicity in northern hemisphere.
	www.ufn.ru /abstracts/abst99/abst991.html (406 words)

	JCSE Volume 1, Paper 13 (Site not responding. Last check: 2007-10-14)
		Stochastic resonance (SR) is a generic term to describe the phenomenon which is manifest in nonlinear systems whereby a – generally feeble – input information (such as a weak signal) can be amplified, and optimized, by the assistance of noise.
		The concept of stochastic resonance was originally put forward in seminal papers by Benzi and collaborators[1~3] wherein they address the problem of the periodically recurrent ice ages.
		In short, stochastic resonance in a symmetric double-well potential manifests itself by a synchronization of activated hopping events between the potential minima with the weak periodic forcing[8].
	www.jcse.org /Volume1/paper13/v1p13.html (1619 words)

	Signal detection theory, detectability and stochastic resonance effects. (Site not responding. Last check: 2007-10-14)
		Stochastic resonance is a phenomenon in which the performance of certain non-linear detectors can be enhanced by the addition of appropriate levels of random noise.
		Through appropriate measures of signal detectability it is possible to decide whether a local improvement in detection via stochastic resonance occurs due to the non-linear effects of the classification process.
		It is demonstrated that the stochastic resonance observed in spiking models is caused by non-linear properties of the spike-generation process itself.
	www.accelerated-learning-online.com /research/signal-detection-theory-detectability-stochastic-resonance-effects.asp (535 words)

	Stochastic Resonance (Site not responding. Last check: 2007-10-14)
		The phenomenon of stochastic resonance (SR) is presented and illustrated by an example of a ferromagnetically coupled spin chain, described by the Glauber's stochastic Ising spin model.
		Further-on, a nonlinear model of a junction in neuronal and road structures is studied using various types of noise (stochastic processes) to generate the incoming traffic.
		It is shown that random fluctuations are able to enhance signal transmission, whereby the zero crossings of colored Gaussian noise is superior to Poissonian noise and, in certain cases, to deterministic, periodic traffic too.
	www.coronetbooks.com /books/stoc9684.htm (279 words)

	Frequency Tuning on Red Noise Driven Stochastic Resonance: Implications to the evolution of sensory systems.
		For the quantification of stochastic resonance we utilized the normalized power norm (9), i.e., the coefficient of correlation between the mean firing rate (MFR) and the input signal.
		The results are characteristic of stochastic resonance, with a quick rise of the correlation to a peak on a specific value of noise intensity followed by a gradual decrease for higher amounts of noise.
		However, the fact that red noise-driven stochastic resonance requires higher noise intensities to reach its peak may be translated into an important adaptation to biological sensors: the ability to benefit from SR at noise intensities that would be degrading for white noise driven SR.
	www.epress.com /w3jbio/vol4/coelho/paper.htm (1974 words)

	Effect of Syncytium Structure of Receptor Systems on Stochastic Resonance Induced by Chaotic Potential Fluctuation -- ...
		The presence of noise is essential for the detection of weak signals by stochastic resonance.
		to the stochastic resonance in the mechanoreceptors that the observed
		Stochastic resonance and the benefits of noise: from ice age to crayfish and squids.
	www.biophysj.org /cgi/content/full/75/4/1700 (5137 words)

	EMF-enhanced-by-stochastic-resonance--(Rapley) (Site not responding. Last check: 2007-10-14)
		Thus, a device which introduces random, stochastic noise, of an ELF nature, may indeed be amplifying the detection of some of the very fields it is trying to swamp.
		The study of stochastic resonance in biological systems is in its infancy, however a number of research groups world wide are now investigating this phenomena.
		Stochastic resonance is, however, well known in electrical engineering circles, and has been for decades.
	www.wave-guide.org /archives/emf-l/Jul1999/EMF-enhanced-by-stochastic-resonance--(Rapley).html (547 words)

	CiteULike: Stochastic resonance (Site not responding. Last check: 2007-10-14)
		As a consequence; stochastic resonance has been observed in a large variety of systems; including bistable ring lasers; semiconductor devices; chemical reactions; and mechanoreceptor cells in the tail fan of a crayfish.
		The essence of classical stochastic resonance theory is presented; and important applications of stochastic resonance in nonlinear optics; solid state devices; and neurophysiology are described and put into context with stochastic resonance theory.
		More elaborate and recent developments of stochastic resonance theory are discussed; ranging from fundamental quantum properties—being important at low temperatures—over spatiotemporal aspects in spatially distributed systems; to realizations in chaotic maps.
	www.citeulike.org /user/rcrane/article/1238452 (686 words)

	Noise boosts nanotube antennas TRN 021104
		This is the same effect -- stochastic resonance -- that neurons use to communicate in biological brains.
		The experiment showed that stochastic resonance in carbon nanotubes could be extremely useful in signal detection and processing under electrically noisy conditions, said Deepak Srivastava, a senior scientist and task lead at NASA Ames Research Center.
		The most exciting aspect of the stochastic resonance behavior is its similarity to biological neurons, said Srivastava.
	www.trnmag.com /Stories/2004/021104/Noise_boosts_nanotube_antennas_021104.html (662 words)

	The Stochastic Resonance Simulation
		As you probably suspect from the term, stochastic resonance is envisioned as involving some sort of random (stochastic) process resonating with a regular, predictable periodic signal to produce a unpredictably large effect.
		The theory of stochastic resonance was originally developed in the early 1980’s to account for the abrupt shifts in earth’s climate (from ice age to warm interglacial and back again) that have occurred with an approximately 100,000 year cycle over the past one million years or so.
		Stochastic resonance depends on the ability of a receptor to respond to noise as well as to the stimulus it ordinarily transduces.
	www.unm.edu /~toolson/435stochresinst.html (2017 words)

	To see the message, just add noise
		The basic idea of stochastic resonance detection, says Kosko, is to create devices with strict threshold effects, that only respond to signals of more than a certain amplitude -- and then set this threshold around, or even below the amplitude
		Kosko has been studying stochastic resonant effects -- how noise can in some circumstances bring out otherwise hidden patterns -- for years, building on work done for the most part in biology.
		Kosko believes that increased awareness of the stochastic resonance phenomenon can aid designers of communications, including especially modern spread-spectrum devices, which often rely on an array of faint signals.
	www.eurekalert.org /pub_releases/2003-12/uosc-tst121603.php (547 words)

	Magnetic Stochastic Resonance (MSR) (Site not responding. Last check: 2007-10-14)
		Magnetostochastic resonance (MSR) is a new effect of a sharp rise of a bistable system response to external fields in the presence of noise due to tunnelling of magnetic moment between energy minima.
		It was shown that the mixed harmonics, which arises under the action of two periodic forces in the presence of noise, demonstrate the stochastic resonance behaviour.
		It was shown that stochastic resonance on higher harmonics has a bigger quality and a wider area of applications than that on the first harmonic and can be observed in various types of monostable systems.
	www.gpi.ru /~grig/g1.htm (504 words)

	\vspace{-20mm}\pretitle \\[20mm] \lbf\ti
		Prominent examples are the phenomena of noise-induced phase transitions [8], stochastic resonance, resonant activation, and noise enhanced stability.
		The phenomenon of stochastic resonance (SR) in its turn has been observed or invoked in connection with the earth's ice-age cycle, a ring-laser, excitable neurones, crayfish mechanoreceptors, SQUIDs (superconducting quantum interference devices), etc..(see [2] for an extensive review and a complete list of references).
		Stochastic models for: (i) atmospheric dispersion phenomena, (ii) microwave transistors, (iii) population dynamics.
	dftpc6.ts.infn.it /pais2001/pa/spagnolo.html (4547 words)

	Stochastic Resonance in Acoustic Emission
		Stochastic resonance allows below-threshold signals to be detected because of the presence of favorable background noise.
		In this paper the author describes stochastic resonance and anti-resonance and presents some examples to illustrate how these affect the detection rates of acoustic emission signals or ultrasonic pulses in low signal-to-noise environments.
		The author introduces the signal fraction, a measure for quantifying the fraction of detected events that contain a signal that appears to have advantages over the signal-to-noise ratio for certain kinds of data, and a formalism for calculating the probability of signal detection when the noise is a time-dependent sinusoid.
	www.astm.org /JOURNALS/TESTEVAL/PAGES/443.htm (164 words)

	Linkenkaer-Hansen: Self-Organized Criticality and Stochastic Resonance in the Human Brain, ISBN 951-22-6217-7
		The hypotheses, experimental paradigms, data analyses, and interpretations of the results are inspired by recent insights from physics - most notable the theory of self-organized criticality and the phenomenon of stochastic resonance whose applicability to large-scale neuronal networks is explained.
		The optimal ability to detect consciously and respond behaviorally to weak somatosensory stimuli at intermediate levels of ongoing sensorimotor oscillations is attributed to stochastic resonance - the intuitively paradoxical phenomenon that the signal-to-noise ratio of detecting or transmitting a signal in a non-linear system can be enhanced by noise.
		Based on the above results, we conjecture that a mechanism of intrinsic stochastic resonance between self-organized critical and stimulus-induced activities may be a general organizing principle of great importance for central nervous system function and account for some of the variability in the way we perceive and react to the outside world.
	lib.tkk.fi /Diss/2002/isbn9512262177 (664 words)

	Journal of Vision - Stochastic resonance in bistable binocular rivalry, by Kim, Grabowecky, & Suzuki
		Synchronization of binocular rivalry was indexed by an increase (relative to the non-driven control) in the "resonant" component of the dominance phase durations matching the half-period of the driving oscillation (i.e.
		We found evidence of stochastic resonance in that the proportion of the resonant component within each dominance-phase distribution was maximal when the driving frequency was near the mean alternation frequency in the non-driven control (Kramer’s rate).
		By analyzing the dependence of the dominance-phase distribution on the driving frequency and amplitude, we inferred the relationship between the depth of the two potential minima and the intensity of the internal noise for the double-well potential model.
	www.journalofvision.org /3/9/54 (297 words)

	Noisy signals strengthen human brainwaves (May 2002) - News - PhysicsWeb
		This effect is called ‘stochastic resonance’ and is well known in a wide range of systems, including living organisms.
		This stochastic – meaning ‘random’ – resonance is most effective when the noisy signal has a certain amplitude relative to the periodic signal.
		Mori and Kai believe that the harmonic peak is good evidence for stochastic resonance in the visual cortex of the brain because it reaches a maximum at a particular signal-to-noise ratio.
	www.physicsweb.org /article/news/6/5/10 (503 words)

	Linkenkaer-Hansen: Self-Organized Criticality and Stochastic Resonance in the Human Brain, ISBN 951-22-6217-7
		The hypotheses, experimental paradigms, data analyses, and interpretations of the results are inspired by recent insights from physics - most notable the theory of self-organized criticality and the phenomenon of stochastic resonance whose applicability to large-scale neuronal networks is explained.
		The optimal ability to detect consciously and respond behaviorally to weak somatosensory stimuli at intermediate levels of ongoing sensorimotor oscillations is attributed to stochastic resonance - the intuitively paradoxical phenomenon that the signal-to-noise ratio of detecting or transmitting a signal in a non-linear system can be enhanced by noise.
		Based on the above results, we conjecture that a mechanism of intrinsic stochastic resonance between self-organized critical and stimulus-induced activities may be a general organizing principle of great importance for central nervous system function and account for some of the variability in the way we perceive and react to the outside world.
	lib.hut.fi /Diss/2002/isbn9512262177 (664 words)

	* Electromagnetic Heart * (Site not responding. Last check: 2007-10-14)
		In essence, stochastic resonance is a nonlinear cooperative effect in which a weak, normally sub-threshold periodic (coherent) stimulus entrains ambient noise, resulting in the periodic signal becoming greatly enhanced and able to produce large scale effects.
		The signature of stochastic resonance is that the signal-to-noise ratio in the system rises to a maximum at some optimal noise intensity, corresponding to the maximum cooperation between the signal and the noise.
		Through stochastic resonance, the "weak", ELF energy of love can affect the body at a cellular level.
	userwww.sfsu.edu /~marymad/heart.html (359 words)

	Comments on 5554 \| MetaFilter (Site not responding. Last check: 2007-10-14)
		This work adds evidence to the idea that stochastic resonance has been adapted by living creatures in their evolution, and makes progress towards designing a definitive behavioral experiment to test this hypothesis.
		The article is saying that stochastic resonance, which is a phenemonon that has been understood for some time in artificial systems, seems to be the most likely way that paddlefish detect their prey.
		Stochastic resonance obtains more information than a static filter can by itself because the noise is adding to the signal enough amplitude to push random bits of it over the threshold.
	www.metafilter.com /comments.mefi/5554 (2599 words)

	5.8 Stochastic resonance
		In most cases there is an optimum for the noise amplitude which has motivated the name stochastic resonance for this rather counterintuitive phenomenon.
		In this section we discuss stochastic resonance in the context of noisy spiking neurons.
		Thus, even though input spikes arrive stochastically, they have some inherent temporal structure, since they are generated by an inhomogeneous Poisson process.
	diwww.epfl.ch /~gerstner/SPNM/node40.html (779 words)

	USC-SIPI REPORT #334 (Site not responding. Last check: 2007-10-14)
		Stochastic resonance (SR) occurs when noise enhances an external forcing signal in a nonlinear dynamical system.
		Stochastic gradient ascent on the signal-to-noise ratio led to ASR for narrowband signals.
		We discovered stochastic resonance in nonlinear systems with impulsive noise that has infinite variance.
	sipi.usc.edu /reports/abstracts/usc-sipi.334.html (465 words)

Try your search on: Qwika (all wikis)