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Topic: Desynchronization

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Lorentz factor

	Journal of Circadian Rhythms \| Full text \| Spontaneous internal desynchronization of locomotor activity and body ... (Site not responding. Last check: 2007-11-03)
		Internal desynchronization has been also reported in humans [7,8], and it is believed to be the cause of several pathologies [9,10].
		A very recent study using a forced desynchronization protocol has indicated the presence of two oscillators in the anatomically SCN subdivisions [22], thus suggesting that the SCN is composed of different populations of circadian oscillators that constitute regional pacemakers controlling specific circadian outputs.
		In mammals the pineal gland is the major source of circulating melatonin, and several studies have shown that melatonin synthesis is under the control of a circadian pacemaker located in the SCN via a multisynaptic pathway [23].
	www.jcircadianrhythms.com /content/4/1/6 (3020 words)

	4
		A common term for this replacement of the regular alpha rhythm with irregular low-voltage activity is desynchronization, because it represents a breaking up of the synchronized activity of neuronal elements responsible for the wave pattern.
		Because desynchronization is produced by sensory stimulation and is correlated with the aroused, alert state, it is also called the arousal or alerting response.
		Furthermore, cortical desynchronization can still be elicited by stimulation of the midbrain reticular formation immediately after thalamic ablation, which indicates that another, alternate extrathalamic route and relay to the cortex must exist.
	www.cmbn.rutgers.edu /faculty/Zaborszky/classes/subcorticalact.html (7181 words)

	Preventing Desynchronization of the Circadian System in Long-Term Space Flight
		In this project, we plan to further investigate this phenomenon, and test specific countermeasures to obviate the occurrence of internal desynchronization in animals exposed to constant dim light.
		Internal desynchronization has profound effects on the capability of the organisms to perform (mentally and physically) and to remain healthy.
		We have designed a series of experiments aimed at understanding the mechanisms that are responsible for the observed desynchronization and testing specific countermeasures aimed at preventing internal desynchronization.
	www.nsbri.org /Research/Projects/viewsummary.epl?pid=180 (363 words)

	FR Doc 05-16749
		We are issuing this AD to prevent desynchronization of one of the three rudder servo actuators, which, if combined with an engine failure, could result in the loss of the related hydraulic system and could cause the loss of one of the two synchronized actuators.
		As explained previously, desynchronization of one of the three rudder servo actuators, if combined with an engine failure, could result in the loss of the related hydraulic system and, potentially, loss of one of the two synchronized actuators.
		If any desynchronization (rudder movement) is detected, prior to further flight, either adjust or replace, as applicable, the spring rod of the affected rudder servo actuator in accordance with the applicable service bulletin.
	a257.g.akamaitech.net /7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/05-16749.htm (2626 words)

	An analysis of desynchronization between the spontaneously breathing patient and ventilator during inspiratory pressure ...
		An analysis of desynchronization between the spontaneously breathing patient and ventilator during inspiratory pressure support -- Fabry et al.
		An analysis of desynchronization between the spontaneously breathing patient and ventilator during inspiratory pressure support
		desynchronization between patient and ventilator occurred, ie, that the
	www.chestjournal.org /cgi/content/abstract/107/5/1387 (466 words)

	Chloride-Cotransport Blockade Desynchronizes Neuronal Discharge in the "Epileptic" Hippocampal Slice -- Hochman and ...
		Chloride-Cotransport Blockade Desynchronizes Neuronal Discharge in the "Epileptic" Hippocampal Slice -- Hochman and Schwartzkroin 83 (1): 406 -- Journal of Neurophysiology
		Chloride-Cotransport Blockade Desynchronizes Neuronal Discharge in the "Epileptic" Hippocampal Slice.
		exposure (45 min), the occurrence of action potentials appeared to be desynchronized with respect to one another and with respect to the negative peaks of the field response.
	jn.physiology.org /cgi/content/full/83/1/406 (7117 words)

	KMORB EXAMPLE: A Simulated Split-Dose Experiment -- Figure 1 (Site not responding. Last check: 2007-11-03)
		When cell desynchronization effects are not included in the cell aging model (for more about the cell aging model, see [St97]), the oscillating behavior of the survival response continues indefinitely because the S phase cells surviving the first dose of radiation remain synchronized.
		However when cell desynchronization effects are included in the cell aging model, the cells in an initially synchronized group of cells tend to redistribute themselves in the cell cycle.
		The net effect of these cell desynchronization effects is to decrease the amplitude of the oscillations as the time between doses increases.
	www.pnl.gov /berc/kbem/example/kmorb_x3f1.html (537 words)

	Delayed Sleep Phase Syndrome - SleepChannel
		Delayed sleep phase syndrome results from a desynchronization between the patient's internal biological clock and the external environment.
		Unlike jet lag, this desynchronization is not activated by travel or change in external environment.
		Subsequently, a patient with DSPS is desynchronized with the routine that governs most of his or her life.
	www.sleepdisorderchannel.com /dsps (355 words)

	Spatio-temporal analysis of irregular vocal fold oscillations:Biphonation due to desynchronization of spatial modes ...
		This report is on direct observation and modal analysis of irregular spatio-temporal vibration patterns of vocal fold pathologies in vivo.
		It is shown quantitatively that biphonation can be induced either by left-right asymmetry or by desynchronized anterior-posterior vibratory modes, and the term "AP (anterior-posterior) biphonation" is introduced.
		This paper proposes methods to analyze quantitatively irregular vocal fold contour patterns in vivo and complements previous findings of desynchronization of vibration modes in computer modes and in in vitro experiments.
	itb.biologie.hu-berlin.de /Research/publications/neubauer2001 (317 words)

	SRO: Abstract Browser (Site not responding. Last check: 2007-11-03)
		The EEG is desynchronized during wakefulness and REM sleep.
		Single neuronal activity was recorded in chronically prepared freely moving normal cats and their activities were correlated with EEG desynchronization during spontaneous wakefulness, REM sleep, and during wakefulness induced by stimulation of the brain stem reticular formation.
		It was found that responses of a majority of the neurons during stimulation-induced desynchronization were similar to that of their firing rate during EEG desynchronization associated with spontaneous wakefulness irrespective of their behavior during REM sleep; the REM-ON neurons were not affected by the stimulation-induced desynchronization.
	www.sro.org /srolow/volume1issue4/abstractbrowser.htm (1148 words)

	APSS Abstracts Search Results (Site not responding. Last check: 2007-11-03)
		Cortical EEG desynchronization is a common characteristic during wakefulness and rapid eye movement (REM) sleep.
		One of the possibilities could be that the same neuron in the brain stem may be involved in EEG desynchronization during wakefulness and REM sleep.
		The EEG was desynchronized (without significant muscle movement) by MRF stimulation and REM sleep was increased by Carbachol injection.
	www.websciences.org /cftemplate/apss97/indiv.dbm?ID=19979326 (433 words)

	BRAIN EEG-MAPPING IN DYSLEXIA (Site not responding. Last check: 2007-11-03)
		The first two images shows average desynchronization in the alpha rhythm of normal teenagers, who were doing the reading and drawing tasks.
		Pfurtscheller's works have shown a sequential desynchronization of the alpha activity from the occipital area to the sensory-motor cortex, during a visuo-verbal task.
		Such focal alterations occur by virtue of a lack of normal alpha rhythm desynchronization during the performance of cognitive tasks.
	www.chasque.apc.org /dcibils/isbeting.html (1529 words)

	Event-related desynchronization (Site not responding. Last check: 2007-11-03)
		The short-lasting event-related amplitude attenuation of the rhythms in the EEG alpha band is called event-related desynchronization (ERD).
		The alpha band rhythm of the EEG is characteristic of inactive cortical fields and alpha desynchronization is thus an indicator of cortical activation.
		Academy of Finland, Department of Psychology at the Åbo Akademi University and Centre for Cognitive Neuroscience at the University of Turku, FIN-20500 Turku, Finland.
	www.psykologienkustannus.fi /sps/abstraktit/abstract_29684_90.htm (137 words)

	Taskbook
		Many biochemical, physiological and behavioral parameters exhibited by organisms show daily fluctuations and most of these daily rhythms persist in constant conditions, thus, demonstrating that they are driven by endogenous oscillators.
		In the present research proposal we plan to further investigate this phenomenon, and to test specific countermeasures to obviate the occurrence of internal desynchronization in animals exposed to constant dim light.
		In this research proposal, we have designed a series of experiment aimed to understand the mechanisms that are responsible for the observed desynchronization and to test specific countermeasures aimed to prevent internal desynchronization.
	taskbook.nasaprs.com /publication/index.cfm?action=public_query_taskbook_content&TASKID=4305 (418 words)

	2003 Meeting Invitation (Site not responding. Last check: 2007-11-03)
		Against this background the SLTBR and the AAMCC have joined forces to explore some areas of common interest in which synchronization and/or desynchronization of biologic rhythms seems to be of importance.
		The 2004 meetings of the SLTBR and the AAMCC were combined in order to provide scientists and clinicians involved in medical chronobiology the current state of knowledge and to discuss new information regarding pathophysiological mechanisms and therapeutic interventions for disorders of biological rhythms.
		Problems of synchronization and desynchronization will be discussed ranging from molecular mechanisms to various fields of internal medicine.
	www.sltbr.org /2004invite.htm (475 words)

	Exar- Area
		Examples of jitter sources include mapping jitter, caused by bit justification, or stuffing, to match the asynchronous bit rate to a synchronous transport signal; and pointer jitter, the outcome of frequency mismatches between two networks that offset the payload and cause pointer movement.
		Discrete desynchronizing solutions use a combination of a very narrow-bandwidth crystal oscillator based Phase Locked Loop (PLL) referred to as a Voltage Control Oscillator (VCXO), and a deep FIFO for each data rate and channel.
		The XRT75L00D features are similar to the XRT75L00, in addition, it supports the desynchronization requirements in SONET STS-1 to DS3 mapping applications and is compliant with GR.253 jitter transfer specifications.
	www.exar.com /new.php?newsID=72 (1021 words)

	Circadian Rhythm Synchronicity A Unified Treatment for Affective Disorders more scientific studies are showing, there ...
		Health is now coming to be viewed as a state when all the body’s biological rhythms are closely "in sync." Moreover, many illnesses, including allergy, arthritis, asthma, cardiovascular disease, depression, and even cancer, are affected by bodily clocks.
		Desynchronization of these clocks can cause a variety of mental and physical problems, including depression, mental fogginess, memory loss, headaches, moodiness, short temper, tension, poor appetite, slow reflexes, fatigue, weakness, and off-schedule bowel movements.
		The body depends upon external cues for a smooth transition between the daytime catecholamine-driven cycle and the nighttime indoleamine sleep and repair cycle.
	www.intelegen.com /nutrients/treatment_affective_disorders.htm (2524 words)

	Synchronization and desynchronization in striate cortical networks (Site not responding. Last check: 2007-11-03)
		One requirement of such a mechanism is the ability to synchronize groups of cells and to desynchronize these groups from each other.
		We present results of a striate cortical model that demonstrates a common mechanism for synchronization and desynchronization.
		We address the role of these synchronizing and desynchronizing connections in mediating perceptual grouping and metastable percepts.
	www.neuroengineering.upenn.edu /publications/abstracts/syen_cns98.html (157 words)

	Detection-Theoretic Analysis of Desynchronization Attacks in Watermarking
		This paper studies the effects of desynchronization attacks such as delay and warping on the performance of watermark detection systems.
		First, we quantify the connection between attack channel estimation accuracy and detection performance.
		Finally, as an alternative to noncoherent watermark detection, we suggest the use of tracking techniques to estimate the warping function, followed by coherent detection.
	research.microsoft.com /pubs/view.aspx?tr_id=547 (150 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		The second part of this paper deals with the behavior of neural networks comprising connected oscillators, which involves looking at the conditions for desynchronization of a totally synchronized oscillator net.
		This leads to the observation that some architectures enable proper desynchronization when the size of the network is large.
		While searching for the conditions for desynchronization, we have discovered that a macroscopic description of the network is sometimes possible.
	www.elsevier.com /cdweb/journals/08936080/articles/12/9/S089360809900068.abstract.en (189 words)

	MDS: Oscillatory Mechanism in Essential Tremor Differs From That in Parkinson's Disease (Site not responding. Last check: 2007-11-03)
		After Fourier transformation, the investigators analyzed the event-related averaged changes of movement-reactive beta frequency in the approximately 2-second epochs around the conclusion of movement.
		The investigators used analysis of variance for statistical analysis of the minimum and maximum power values of desynchronization and synchronization for repeated measures of the 2 groups.
		In contrast, patients with essential tremor had no difference between desynchronization and its latency during the movement of the more tremulous and less tremulous hands (P =.
	www.pslgroup.com /dg/2446D2.htm (615 words)

	The Best of Both Worlds: The Efficient Asynchronous Implementation of Synchronous Specifications
		The desynchronization approach combines a traditional synchronous specification style with a robust asynchronous implementation model.
		The main contribution of this paper is the description of two optimizations that decrease the overhead of desynchronization.
		First, we investigate the use of clustering to vary the granularity of desynchronization.
	www.gigascale.org /pubs/537.html (268 words)

	Complexity Digest - Desynchronization Of Neural Activity In A Network Model (Site not responding. Last check: 2007-11-03)
		Desynchronization Of Neural Activity In A Network Model, Neurocomputing
		Abstract: Electric brain activity during seizures is often associated with hyperactive and synchronous bursts of activity.
		An electric current proportional to the inverted field potential was an effective desynchronizing stimulus in smaller networks.
	www.comdig.org /article.php?id_article=12061 (137 words)

	abstract (Site not responding. Last check: 2007-11-03)
		Desynchronization, mode-locking and bursting in strongly coupled integrate-and-fire oscillators
		We show how a synchronized pair of integrate-and-fire neural oscillators with non-instantaneous synaptic interactions can destabilize in the strong coupling regime resulting in non-phase-locked behaviour.
		In the case of symmetric inhibitory coupling, desynchronization produces an inhomogeneous state in which one of the oscillators becomes inactive (oscillator death).
	www.math.utah.edu /~bresslof/publications/98-2abs.html (81 words)

	VideoHelp.com Forum Archive - Desynchronization becomes bigger and bigger
		On hard disk I have VCD movie (captured from VHS) that is perfectly synchronized.
		When I burned it to CD with Unlead Movie Factory (with chapters and so on) tha gap (desynchronization) between audio and video becomes bigger and bigger as VCD approaches near the end.
		If I copy .DAT file from CD to hard, there is also the same desynchronization*.
	www.videohelp.com /forum/archive/t85339.html (200 words)

	Desynchrony
		These desynchronizing connections have a short range, and two objects cannot be segmented if their distance is not small.
		Here, desynchronization between two blocks means that they never stay in the active phase at the same time.
		Campbell and Wang (in press) also addressed desynchronization, and their simulations show that a network of Wilson-Cowan oscillators with a global unit can exhibit desynchronization among groups of oscillators, each of which is a synchronous body.
	www.cs.utexas.edu /~nn/web-pubs/htmlbook96/wang/node8.html (455 words)

	von Deutsch (Site not responding. Last check: 2007-11-03)
		Our previous work has demonstrated that the overall circadian organization is affected by the long-term exposure to constant conditions.
		We discovered that in 20-30 % of rats exposed to constant dim light (1 m W/cm 2) for 60 days desynchronization among circadian rhythms might occur.
		The aim of our research is to investigate the physiological consequences of internal desynchronization and to test specific countermeasures (melatonin and light) to obviate internal desynchronization.
	www.msm.edu /nasa/tosini.htm (315 words)

	Research Areas
		Circadian rhythms are those that persist in constant conditions with a period close to 24 hours.
		In space, the loss of a 24-hr day/night cycle affects the ability of astronauts to sleep, and in the case of long-duration flights, can lead to internal desynchronization, which has profound effects on an astronauts capability to perform (mentally and physically) and to remain healthy.
		This animal study by Dr. Gianluca Tosini will test if melatonin injection and exposure to brief pulses of light can prevent internal desynchronization, and seeks to understand the mechanisms responsible.
	www.nsbri.org /Research/Projects/viewdesc.epl?pid=180 (123 words)

	EEG References
		Baker, G., & Franken, R. Effects of stimulus size, brightness and complexity on EEG desynchronization.
		Pfurtscheller, G. Mapping of event-related desynchronization and type of derivation.
		Pfurtscheller, G., & Klimesch, W. Topographical display and interpretation of event-related desynchronization during a visual-verbal task.
	www.skiltopo.com /papers/applied/articles/dakdissr.htm (4022 words)

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