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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 20 of 198 for “"synchronisation"”.
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Application of synchronisation theory to plankton patchiness
… and mixing effects of the flow. The methods of synchronisation theory are applied within this framework to gain insight into emergent spatial structure in biophysical simulations. The manifestation of synchronisation, including statistically stable local clustering of populations, …
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Frame synchronisation methods for digital satellite system
… Time-Division Multiple-Access (SSTDMA) network synchronisation, frame synchronisers, remote sensing satellite data decommutating systems, and prototype frame synchroniser implementation. In the area of SSTDMA network synchronisation, this thesis reports several new synchronisation methods based …
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Combinatorial aspects of synchronisation, percolation, and arithmetic
… rigorous mathematical analysis in the field of synchronisation and nonlinear dynamics. A realisation of this model consists of a collection of identical oscillators with interactions given by the edges of a graph. We show that a graph with sufficient expansion must be globally synchronising, …
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A novel maximal-length sequence synchronisation network
… and demodulate the data. Common methods of synchronisation use a two pronged solution. Firstly the correct code phase is determined. This is referred to as code acquisition. Secondly the clocking frequency of the received waveform must be resolved in order to precisely align the two …
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Multi-h synchronisation for codes with long constraints-length
This dissertation investigates the synchronisation of Multi-h signals with a long constraint length. However, Multi-h codes exhibiting a long constraint length invariably also exhibit a large denominator q. Since traditional methods for synchronising Multi-h signals utilises a q-th power law …
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Novel low cost synchronisation network for spread spectrum systems
… aspects of Spread Spectrum design is the synchronisation of the spreading waveform. The primary characteristic of pseudonoise sequence synchronisation is the need for two levels of synchronisation namely acquisition (course synchronisation) and tracking (fine synchronisation). In these …
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Network time : synchronisation in real time distributed computing systems
In the past, network clock synchronization has been sufficient for the needs of traditional distributed systems, for such purposes as maintaining Network File Systems, enabling Internet mail services and supporting other applications that require a degree of clock synchronization. Increasingly real …
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The Construction of Variable Length Codes with Good Synchronisation Properties
… optimal data compression in circumstances where synchronisation may be lost and error propagation can occur.<br/><br/>Some background information on binary variable length codes is given, particularly relating to the problems of compression and synchronisation. A review of the literature on the …
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Nichtlineare Kopplungsmechanismen akustischer Oszillatoren am Beispiel der Synchronisation von Orgelpfeifen
… von akustischen Oszillatoren untersucht, die zu Synchronisation führen können. Aufbauend auf die Fragestellungen vorangegangener Arbeiten werden mit Hilfe theoretischer und experimenteller Studien sowie mit Hilfe numerischer Simulationen die Elemente der Tonentstehung in der Orgelpfeife und die …
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Sequence Synchronisation in Chaos-based Direct Sequence Spread Spectrum Communication Systems
… into the modelling and performance of sequence synchronisation in Chaos-based Direct Sequence Spread Spectrum (CDS-SS) communication systems with the aims of identifying the existing gaps in research and suggesting a new and accurate modelling approach. The CDS-SS systems offer physical layer …
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Nonlinear Dynamics, Synchronisation and Chaos in Coupled FHN Cardiac and Neural Cells
… the dynamics of coupled cells in terms of synchronisation measures is treated at length. Most notably it is shown that for cells that themselves cannot admit chaotic solutions, communication between cells be it through electrical coupling or synaptic like coupling, can lead to the emergence …
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The role of hydrodynamic forces in synchronisation and alignment of mammalian motile cilia
… the hydrodynamic forces necessary for the synchronisation and alignment of motile cilia from brain and airways. This question was addressed experimentally by measuring cilia motility during treatment with oscillatory and constant external fluid flows. We found that synchronisation and …
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Development of a synchronisation and video conversion unit for Denel Overberg Test Range's tracking radar
… Denel Overberg Test Range (OTR), defined as the Synchronisation and Video Conversion Unit (SVCU). The SVCU performs the task of baseband video processing, generation of all synchronisation triggers, and timing within the TR. The report is based on the Research and Design (R&D) project conducted …
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Synchronising coherent networked radar using low-cost GPS-disciplined oscillators
… require accurate time, frequency, and phase synchronisation. Global positioning system (GPS) synchronisation is precise, low-cost, passive and covert, and appears well-suited to synchronise networked radar. However, very few published examples exist. An imperfectly synchronised bistatic …
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Über Synchronisationsphänomene nichtlinearer akustischer Oszillatoren
In dieser Arbeit werden die Effekte der Synchronisation nichtlinearer, akustischer Oszillatoren am Beispiel zweier Orgelpfeifen untersucht. Aus vorhandenen, experimentellen Messdaten werden die typischen Merkmale der Synchronisation extrahiert und dargestellt. Es folgt eine detaillierte Analyse der …
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Synchronization in ensembles of nonisochronous oscillators
Diese Arbeit analysiert Synchronisationsphaenomene, die in grossen Ensembles von interagierenden Oszillatoren auftauchen. Im speziellen werden die Effekte von Nicht-Isochronizitaet (die Abhaengigkeit der Frequenz von der Amplitude des Oszillators) auf den makroskopischen Uebergang zur …
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Synchronization analysis by means of recurrences in phase space
… von Mitteilungen. Abgesehen davon, findet man Synchronisation in natürlichen Systemen, wie z.B. das Herz-Atmungssystem, raumverteilte ökologische Systeme, die Magnetoenzephalographische Aktivität von Parkinson Patienten, etc. In solchen komplexen Systemen ist es nicht trivial Synchronisation zu …
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Variable dwell time verification strategies for CDMA acquisition with application to GPS signals
… of decision-making strategy, such that signal synchronisation can be achieved in the minimum time. The synchronisation process involves two steps: coarse synchronisation (acquisition) and fine synchronisation (tracking). The treatment begins with the cell-level decision-making strategy, where a …
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Radio frequency and terahertz signals generated by passively mode-locked semiconductor lasers
… saturable absorber in order to achieve the phase synchronisation. The laser diodes studied in this thesis, are demonstrated to operate in the mode-locked regime, while not requiring any direct or external modulation, nor the saturable absorbtion element in order to achieve the phase …
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Phase synchronization analysis of event-related brain potentials in language processing
Das Forschungsthema Synchronisation bildet einen Schnittpunkt von Nichtlinearer Dynamik und Neurowissenschaft. So hat zum einen neurobiologische Forschung gezeigt, daß die Synchronisation neuronaler Aktivität einen wesentlichen Aspekt der Funktionsweise des Gehirns darstellt. Zum anderen haben …
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