Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Refractory period"”.
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Some observations on the refractory period of the heart
… of quinidine for their treatment, the refractory period has assumed an increasingly important ró le in understanding the pathology and the therapeutics of many disorders of cardiac contraction. A thorough knowledge of its physiology, therefore, is of great importance. Unfortunately, …
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The Effects of the Phenomenon of the Psychological Refractory Period Upon College Athletes and Non-Athletes
… 3. There are no significant differences of the refractory time means at the various time intervals between stimulus presentation of athletes and non-athletes.
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A Re-examination of Reproductive Arrest in the Monarch Butterfly, Danaus plexippus.
… have been characterized as changes in photoperiod, declining host plant quality, and temperature (Goehring and Oberhauser 2002), and in another study simply as temperature (James 1982). This study was conducted to examine cool temperature as the stimulus for the induction of reproductive …
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Influence of perforant path synaptic excitation on the initiation of hippocampal sharp-wave ripple activity in vitro
… PP stimulus timing during the ~250 ms sSWR refractory period revealed a statistically significant effect of stimulus delay (25, 50, 100, and 200 ms) on eSWR incidence, reaching a value of 0.72 (95% CI = [0.61, 0.81]) 200 ms after sSWR onset. In contrast, sSWR incidence at this time was much …
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Dynamic Characterization of the IKK:κBα:NFκB Negative Feedback Loop Using Real-Time Bioluminescence Imaging
… we discovered a TNFα-induced transient refractory period (lasting up to 120 min) during which cells were unable to fully degrade IκBα following a second TNFα challenge, and identified nuclear export of NF-κB: IκBα complexes as a rate-limiting step that may impact this refractory period. …
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Parallel processing in overlapping tasks: A model and a method
… of reaction-time tasks in the psychological refractory period paradigm was developed. The first, preparation-based bottleneck prevents perceptual and decisional processes in the second task from operating in parallel with the first task when these processes require specific and explicit …
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Electronic simulation of an associative neuron
… have a duration of 0.7 ms. and are followed by a refractory period of about one millisecond. A depolarization input lowers the amplitude of the output pulse by a predetermined time course.
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Towards a better speech processor for cochlear implants : auditory- nerve responses to high-rate electric pulse trains
… at higher (>600 Hz) frequencies, for which the period of the electric stimulus is near the AN refractory period. For example, in response to a 1000-Hz pulse train, most AN fibers may fire on every other stimulus cycle, so that the AN population would represent half of the stimulus frequency …
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Parallel Response Selection in Dual -Tasks
… at a time. Using variations of the Psychological Refractory Period (PRP) paradigm, most authors have converged on Pashler's Response Selection Bottleneck (RSB) theory. RSB theory relies on a discrete stage processing assumption in modeling PRP reaction time data using the locus-of-slack logic. …
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Analysis of Immediate-Early Gene Expression in the Songbird Brain Following Song Presentation
… of the same song, but does not enter an absolute refractory period after habituation, since another song will elicit a full genomic response; these results suggest that cells showing ZENK response are related to auditory processing and song discrimination.</p>
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The representation of numbers in space : a journey along the mental number line
… of the SNARC effect. We used the psychological refractory period paradigm. In the first experiment participants first indicated the pitch of a tone and then the parity status of a digit (locus-of-slack paradigma). In a second experiment the order of stimulus presentation and thus tasks changed …
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Cost utility and budget impact analysis of bortezomib and lenalidomide for the treatment of relapsed/refractory multiple myeloma in the South African public health sector
… relapses leading to the development of relapse/refractory multiple myeloma (RRMM). During the relapse/refractory period, the patient is nonresponsive to treatment and/or experiences progressive disease When a patient experiences relapse/refractory MM, their prior, (first line) treatment is …
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The Role of Time Variant Resistance and Electromotive Force in Ionic Systems Related to Cell Membranes: The Excitability Properties of Frog Skin and Toad Bladder
… potential with a sharp threshold and a prolonged refractory period is elicited. We emphasized that interruption of the current during any point in the action potential abolishes the response, and we have shown, through appropriate bridge measurements, that this is a consequence of the fact that …
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High performance computational simulations of gastrointestinal electrical activity
… the frequency of the native propagation and the refractory period of the underlying cellular activity. Finally, the computational performance of different preconditioners for tridomain model was analysed. The block-Jacobi preconditioned conjugate-gradient solver was found to be the most efficient …
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Small intestine slow wave activity defined through in vivo high-resolution electrical mapping
… between the size of the re-entrant circuit, refractory period, and anisotropic slow wave velocity. In the final component of this thesis, in vivo high-resolution electrical mapping was successfully translated to the healthy human jejunum, serving as the rst successful high-resolution …
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Optically injected dual state quantum dot lasers
… introduces a different square wave train, with a period of a tens of milliseconds. Excitable GS dropouts with accompanying ES pulses are also observed close to the negative unlocking boundary. These events are shown to be noise induced or can be deterministically triggered. The events can display …