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Dissertations / Theses on the topic 'Coherence time'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

De, Supinski Bronis R. "Logical time coherence maintenance." Full text, Acrobat Reader required, 1998. http://viva.lib.virginia.edu/etd/theses/supinski98.pdf.

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2

Abuhajar, Suhir. "Visualizing real time vasomotion in vivo using optical coherence tomography." Thesis, Lancaster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659170.

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As blood vessel imaging techniques facilitate the fundamental understanding in vascular performance diagnosis and biomedical research improvement, we aimed to visualize and understand the blood vessels dynamics under human skin and their underlying mechanisms in real time. In this study, a noninvasive imaging system was selected to provide an investigation of the real time oscillation of blood vessels in vivo, using Spectral Radar Optical Coherence Tomography (SROCT). This main goal was achieved by evaluating the precision and confidence in recorded data by using a phantom made of Intralipid (

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3

GUIDOBONI, Greta. "Spin Coherence Time studies for the storage ring EDM search." Doctoral thesis, Università degli studi di Ferrara, 2013. http://hdl.handle.net/11392/2388878.

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This thesis is part of the feasibility studies for a search for an Electric Dipole Moment (EDM) of charged particles in a storage ring. The evidence for a non-vanishing EDM at the sensitivity of present or planned experiments would clearly prove the existence of new CP violating meachanisms beyond the Standard Model. The proposed solution to measure the EDM of charged particles is the use of a storage ring where the polarized charged particle beam can be kept circulating while interacting with a radial electric field. Starting with a longitudinally polarized beam, the EDM signal would

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4

Anglada, Sánchez Martí. "Exploiting frame coherence in real-time rendering for energy-efficient GPUs." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/669210.

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The computation capabilities of mobile GPUs have greatly evolved in the last generations, allowing real-time rendering of realistic scenes. However, the desire for processing complex environments clashes with the battery-operated nature of smartphones, for which users expect long operating times per charge and a low-enough temperature to comfortably hold them. Consequently, improving the energy-efficiency of mobile GPUs is paramount to fulfill both performance and low-power goals. The work of the processors from within the GPU and their accesses to off-chip memory are the main sources of energ

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5

Twengström, Mikael. "Time-reversal symmetry breaking and mixed coherence lengths in multicomponent superconductors." Thesis, KTH, Fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-138163.

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6

Wojcik, Aleksander Karol. "Signal statistics of phase dependent optical time domain reflectometry." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4873.

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The statistics of the phase dependent optical time-domain reflectometer have been analyzed. The optical fiber is modeled by the use of a discrete set of reflectors positioned randomly along the fiber. The statistics of the reflected light from a traveling pulse are derived. The statistics of the signal are used to calculate the characteristics of shot noise in the photodetector, and the probability that noise of certain intensity will occur. An estimation of the backscattered power is made by calculating the fraction of the backscattered power that is captured in a guiding mode. Upper power li

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7

Panagos, Adam G., and Kurt Kosbar. "MIMO CHANNEL TIME VARIATION AS A FUNCTION OF MOBILE USER VELOCITY." International Foundation for Telemetering, 2004. http://hdl.handle.net/10150/605780.

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International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California<br>The analysis of multiple-input multiple-output (MIMO) communication systems often assumes a static, or quasi-static, environment. Platform motion and changes in the environment makes this an unreasonable assumption for many telemetry applications. This paper uses computer simulations to characterize the time variation of MIMO channel parameters when there is relative motion between the transmitter and receiver. These simulation results yield explicit time intervals over whi

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8

Chen, Jiajian. "Non-photorealistic rendering with coherence for augmented reality." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45749.

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A seamless blending of the real and virtual worlds is key to increased immersion and improved user experiences for augmented reality (AR). Photorealistic and non-photorealistic rendering (NPR) are two ways to achieve this goal. Non-photorealistic rendering creates an abstract and stylized version of both the real and virtual world, making them indistinguishable. This could be particularly useful in some applications (e.g., AR/VR aided machine repair, or for virtual medical surgery) or for certain AR games with artistic stylization. Achieving temporal coherence is a key challenge for all NPR a

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9

Ansari, Zunaira. "Whole field, real time photorefractive holography for imaging through turbid media using sources of diverse spatial and temporal coherence." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289853.

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10

Clark, Ian George. "A unified approach to the study of asynchronous communication mechanisms in real-time systems." Thesis, King's College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326237.

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11

Freiberger, Manuel. "A time domain optical coherence tomograph for laboratory investigations on phantoms and human skin." Thesis, Linköping University, Department of Biomedical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-3852.

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<p>Optical coherence tomography is an imaging modality with an outstanding resolution. During the project, a time domain OCT system based on a Michelson fibre interferometer was implemented and put into operation. A super-luminescent diode with a centre wavelength of 1295nm and a bandwidth of 45nm was selected as light source and a linear variable delay line as reference. Basic tests were made on phantoms constructed of filter foils and on gel-like agar slices with optical properties similar to human tissue. It was shown that the achievable resolution was at least 36um and can be increased. Th

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12

Ruggeri, Marco. "Extended Depth Optical Coherence Tomography for Anterior Segment and Accommodation Imaging in Real-Time." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/686.

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The changes in the human crystalline lens shape and its internal structure during accommodation and with aging are a fundamental component of the dynamic mechanism of accommodation and presbyopia, the loss of near vision with age. A better understanding of the crystalline lens changes during accommodation will help in developing new treatments to correct for presbyopia. The goal of this dissertation is to design and develop an imaging system to study the dynamic changes in lens shape during accommodative response. An imaging system based on spectral domain optical coherence tomography (SD-OCT)

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13

Zhang, Jinke. "Development of time-domain full-field optical coherence tomography as a non-destructive testing method." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3015759/.

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Optical coherence tomography (OCT) serves as a non-destructive and non-invasive technique that is capable of imaging the inner structure of optical scattering samples with a high spatial resolution and deep penetration depth. Full-field time-domain OCT (FF-TD-OCT) is an extension of time-domain OCT (TD-OCT) which uses a two-dimensional (2D) detector to capture a series of en-face images to reconstruct the inner structure of samples in three-dimension (3D). In pharmaceutical industry, the pellet or tablet coating performs an important role in the release of active pharmaceutical ingredients (AP

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14

Sorgenfrei, Florian [Verfasser]. "Time-Resolved Jitter-Free Experiments at FLASH: From Longitudinal Coherence Studies to Nonlinear Dynamics / Florian Sorgenfrei." München : Verlag Dr. Hut, 2013. http://d-nb.info/1042308047/34.

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15

Acharya, Megha N. "Speckle Reduction in an All Fiber Time Domain Common Path Optical Coherence Tomography by Frame Averaging." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1353336847.

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16

Ullah, Saeed. "Optical control and detection of spin coherence in multilayer systems." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-10052017-163058/.

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Since a decade, spintronics and related physics have attracted considerable attention due to the massive research conducted in these areas. The main reason for growing interest in these fields is the expectation to use the electrons spin instead of or in addition to the charge for the applications in spin-based electronics, quantum information, and quantum computation. A prime concern for these spins to be possible candidates for carrying information is the ability to coherently control them on the time scales much faster than the decoherence times. This thesis reports on the spin dynamics in

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17

Lopes, Kim Samejima Mascarenhas. "Coerência parcial e aplicações." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-05112013-173150/.

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Neste trabalho foram estudadas algumas formas de relação entre séries temporais multivariadas. Discutiu-se, inicialmente, a função de coerência, uma função análoga a função de correlação(que é dada no domínio do tempo) calculada no domínio da freqüência. Foram estudadas também as funções de coerência parcial e coerência parcial direcionada. A função de coerência parcial mede a relação entre duas componentes de uma série multivariada, isolados os efeitos de outra série. Em linhas gerais, a Coerência Parcial Direcionada pode ser interpredata como a decomposição da coerência parcial a partir de m

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18

Khastehdel, Fumani Ahmad. "QUANTUM CONFINED STATES AND ROOM TEMPERATURE SPIN COHERENCE IN SEMICONDUCTOR NANOCRYSTAL QUANTUM DOTS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1449151739.

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19

Barsegov, Valeri Abulevich. "Quantum decoherence and time symmetry breaking : quantum-classical correspondence in non-adiabatic transitions /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004212.

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20

Baskin, John Spencer Zewail Ahmed H. Zewail Ahmed H. "Real-time observation and analysis of coherence and alignment in molecular systems : isolated molecules and chemical reactions /." Diss., Pasadena, Calif. : California Institute of Technology, 1990. http://resolver.caltech.edu/CaltechETD:etd-11252003-112746.

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21

Bäckström, Caroline A. "Professional and social support for first-time mothers and partners during childbearing." Doctoral thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ. CHILD, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-38334.

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Background: Expecting a child and becoming a parent is one of life’s major events, during which the parents’ perspective on life and their couple relationship changes. For some parents, childbearing entails a decrease in parental couple relationship quality. The way in which parents are able to cope with childbearing may be connected with their Sense of Coherence; which is a person’s ability to perceive life as comprehensible, manageable and meaningful. For parents’ positive childbearing experiences, professional and social support have been proven to be valuable. However, far from all parents

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22

Thomas, Joshua Bryan. "Using the Coherence Function as a Means to Improve Frequency Domain Least Squares System Identification." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1166476245.

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23

Zhao, Xiaowei. "MONITORING RADIOFREQUENCY ABLATION WITH POLARIZATION-SENSITIVE OPTICAL COHERENCE TOMOGRAPHY FOR THE TREATMENT OF ATRIAL FIBRILLATION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1619825666351729.

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24

Boussemaere, Luc. "Investigating off-axis digital holographic microscopy with a source of partial spatial coherence as a real-time sensor for cell cultures." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209086.

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Bio-pharmaceutical industry is a vast growing market and recent recommendations of the Food and Drug Administration have put a large emphasis on the characterization of biological processes and models. As a consequence, there is a high incentive on developing modern sensors in order to more accurately monitor and control processes. In that way, Digital Holographic Microscopy (DHM) presents unique features thanks to the refocusing and quantitative phase contrast imaging capabilities. In this thesis we investigate the usage of DHM to monitor yeast cultures that are often used in both the bio-pha

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25

Muhammad, Rashed D. B. "Assessment of new real-time in-situ optical coherence tomography instrumentation and techniques for diagnosing and monitoring oral and cutaneous lesions." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1471556/.

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Head and neck cancer is the sixth most common cancer worldwide, with 686,328 new cases per year. Most head and neck cancers are squamous cell carcinomas of the oral cavity and oropharynx, and are burdened by high mortality (50% at 5 years from diagnosis), notwithstanding recent progress in treatment methods. The vast majority of oro-pharyngeal cancers are late diagnosed, with significant adverse effects on cure, morbidity and prognosis. There is general consensus that earlier diagnosis contributes to better outcome measures. Current diagnostic standards consist of clinical examination and surg

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26

Jansz, Paul V. "Characterising the effect of a novel optical delay line and light sources on the resolvability of time domain optical coherence tomography." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1755.

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Optical coherence tomography (OCT) is a reflection based imaging technique, with numerous applications, initially in medical diagnostics. Unlike ultrasound, another reflection imaging technique, OCT relies on light scattering in samples, low coherence near- infrared interferometry, and graphical image construction, to acquire 2D and 3D reflectogram images. OCT has resolution an order of magnitude greater than ultrasound, but its depth penetration is less than a few millimetres. Axial resolution is a critical parameter in determining whether OCT can be used to resolve specific features in a sam

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27

Jakubisin, Daniel J. "Array Processing for Mobile Wireless Communication in the 60 GHz Band." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/31130.

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In 2001, the Federal Communications Commission made available a large block of spectrum known as the 60 GHz band. The 60 GHz band is attractive because it provides the opportunity of multi-Gbps data rates with unlicensed commercial use. One of the main challenges facing the use of this band is poor propagation characteristics including high path loss and strong attenuation due to oxygen absorption. Antenna arrays have been proposed as a means of combating these effects. This thesis provides an analysis of array processing for communication systems operating in the 60 GHz band. Based on measure

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28

Kinnunen, M. (Matti). "Comparison of optical coherence tomography, the pulsed photoacoustic technique, and the time-of-flight technique in glucose measurements in vitro." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514281462.

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Abstract The development of a non-invasive glucose monitoring technique is very important because it would tremendously diminish the need to puncture the skin when taking blood samples and help diabetic patients in controlling their blood glucose levels and in treating Diabetes Mellitus. The focus of this thesis is on measuring the effect of glucose on the light scattering properties of a tissue-simulating phantom and biological tissues in vitro. Optical coherence tomography (OCT), the pulsed photoacoustic (PA) technique, and the time-of-flight (TOF) technique are used in the measurements and

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29

Roden, John S., James A. Johnstone, and Todd E. Dawson. "Regional And Watershed-Scale Coherence In The Stable-Oxygen and Carbon Isotope Ratio Time Series in Tree Rings Of Coast Redwood (Sequoia Sempervirens)." Tree-Ring Society, 2011. http://hdl.handle.net/10150/622643.

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Coast redwood (Sequoia sempervirens) ecosystems are strongly influenced by the presence of summer marine fog, and variation in fog frequency is closely linked to climate variation in the NE Pacific region. Because oxygen isotope composition (𝛿¹⁸O) of organic matter records distinct water sources (e.g. summertime fog vs. winter precipitation) and carbon isotopes (𝛿¹³C) are typically sensitive to humidity and water status, it then follows that inter-annual variation in tree-ring isotope ratios, which are coherent across multiple sites, should preserve a potentially powerful proxy for climate re

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30

Harris, John. "Structural coherence in early anthologies of French prose short stories : a study of the unframed collections compiled at the time of François I." Thesis, Royal Holloway, University of London, 1987. http://repository.royalholloway.ac.uk/items/2e430c40-9caa-4261-a000-45303faea6b4/1/.

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Four anthologies of sixteenth-century French prose contes are examined, with the aim of elucidating the processes which informed their compilation and the reading strategies which they imply, and the relationship between the structural coherence of unframed anthologies and that of collections incorporating a frame-story structure.'Framed' collections and their structures have served as the yardstick against which unframed anthologies have been measured, and judged to be loose compilations whose component tales may be read in any order. Though the view of framed collections implied by this comp

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31

Avena, Anna. "Analyzing brain connectivity of disorder of consciousness patients with a multi-variate, time-dependent and adaptive arma model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20409/.

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Nell'ambito delle neuroscienze vengono effettuati sempre più studi al fine di comprendere meglio le reti cerebrali e le loro dinamiche. La comunità scientifica ha condotto numerosi studi ed esperimenti sulle normali funzioni cerebrali umane, ma solo recentemente un discreto numero di ricercatori ha rivolto la propria attenzione all'analisi di diversi disturbi cerebrali, tra cui i disturbi della coscienza (Disorders of Consciousness o DoC). Un DoC è uno stato in cui viene meno la capacità psichica e cognitiva della persona e quest'ultima non mostra segni di veglia e/o di consapevolezza. Quest

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32

Stevens, Christopher E. "Study of Transition Metal Dichalcogenides Via Linear and Non-Linear Spectroscopy." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7955.

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Beginning with the discovery of graphene, two-dimensional materials have amassed a strong interest. Like graphene, transition metal dichalcogenides (TMDs) can be coaxed into atomically thin sheets which have some impressive properties. Unlike graphene, TMDs also has a change in their electronic band structure causing an indirect band gap to a direct gap transition in its monolayer form. Additionally, these materials lose their inversion symmetry as a monolayer. These unique properties make TMDs a strong candidate for being used in optoelect

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33

Maraun, Douglas. "What can we learn from climate data? : Methods for fluctuation, time/scale and phase analysis." Phd thesis, [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981698980.

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34

Klimeš, Petr. "Stanovení vzájemných vazeb mezi mozkovými strukturami." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-263416.

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The Human brain consists of mutually connected neuronal populations that build anatomically and functionally separated structures. To understand human brain activity and connectivity, it is crucial to describe how these structures are connected and how information is spread. Commonly used methods often work with data from scalp EEG, with a limited number of contacts, and are incapable of observing dynamic changes during cognitive processes or different behavioural states. In addition, connectivity studies almost never analyse pathological parts of the brain, which can have a crucial impact on

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35

Takahashi, Daniel Yasumasa. "Medidas de fluxo de informação com aplicação em neurociência." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/95/95131/tde-07062011-115256/.

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Inferência da força de interação nos fenômenos físicos/biológicos é objetivo comum a diversas áreas da ciência. Em particular, nas neurociências tem-se assistido a uma mudança no paradigma experimental em que a atenção tem-se voltado à compreensão da interação entre grupamentos neuronais. Em vista desta demanda surgiram naturalmente diversos métodos estatísticos de medida de dependência entre grupamentos neurais. Alguns foram desenhados para inferência de fluxo de informação, sem contudo precisar o que se entende por fluxo de informação, gerando consequentemente controvérsias na literatura. O

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36

Pyon, Okmin. "The data processing to detect correlated movement of Cerebral Palsy patient in early phase." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/64776.

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The early diagnosis of CP (Cerebral Palsy) in infants is important for developing meaningful interventions. One of the major symptoms of the CP is lack of the coordinated movements of a baby. The bilateral coordinated movement (BCM) is that a baby shows in the early development stage. Each limb movement shows various ranges of speed and angle with fluency in a normal infant. When a baby has CP the movements are cramped and more synchronized. A quantitative method is needed to diagnose the BCM. Data is collected from 3-axis accelerometers, which are connected, to each limb of the baby. Signa

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Khoshnavaz, Mohammad Javad. "Coherency based time-domain imaging algorithms." Thesis, Curtin University, 2016. http://hdl.handle.net/20.500.11937/54048.

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Seismic time-domain imaging is one of the most robust tools in seismic data processing. Compared with depth imaging, time-domain imaging employs a reduced number of parameters by taking effective approximations for wave propagation in the subsurface. Accurate time-domain seismic imaging as applied in very complex environments (e.g., hard rock environments) requires a novel critical thinking. In this thesis, several efficient time-domain imaging techniques have been developed and successfully applied to different seismic data sets.

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38

Gustafsson, Amanda, and Pia Lindgren. "Faktorer för att upprätthålla psykosocial hälsa : -en studie utifrån socialsekreterares egna upplevelser." Thesis, Linnéuniversitetet, Institutionen för socialt arbete (SA), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-29595.

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Research on psychosocial health in social work isn't developed enough. Instead, there's much more research on psychosocial unhealth. What about social workers, the unhealth is often related to the situation at work and the work environment. The aim of this study was to "during interviews understand the factors which social workers experience as important to maintain their own psychosocial health in the life situations". With hermeneutic method the particular interest was directed on how the participants experienced and explained their psychosocial health on the basis of their life situations,

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Lopes, Kim Samejima Mascarenhas. "Directed wavelet covariance for locally stationary processes." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-14032018-174950/.

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The main goal of this study is to propose a methodology that measures directed relations between locally stationary processes. Unlike stationary processes, locally stationary processes may present sudden pattern changes and have local characteristics in specific intervals. This behavior causes instability in measures based on Fourier transforms. The relevance of this study relies on considering these processes and propose robust methodologies that are not affected by outliers, sudden pattern changes or local behavior. We start reviewing the Partial Directed Coherence (PDC) and the Wavelet Coh

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García, Arellano Guadalupe. "Influence of the concentration and temperature on the spin relaxation time of donor-bound electrons immersed in a CdTe quantum well." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS109.

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Ce travail présente une étude de l'influence de la concentration de dopage, de la température et du champ magnétique longitudinal sur le temps de relaxation de spin des électrons liés aux donneurs immergés au milieu d'un puits quantique (PQ) de CdTe. En insérant les donneurs dans un PQ, les règles de sélection optique de la lumière polarisée circulairement sont purifiées, ce qui permet un meilleur degré d'orientation optique des spins des électrons que dans les cristaux 3D. En utilisant une technique de rotation Faraday photo-induite, nous mesurons d’abord le temps de relaxation de spin des él

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Locquet, Alexandre Daniel. "Chaotic optical communications using delayed feedback systems." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10431.

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Chaotic dynamics produced by optical delay systems have interesting applications in telecommunications. Optical chaos can be used to transmit secretly, in real-time, a message between an emitter and a receiver. The noise-like appearance of chaos is used to conceal the message, and the synchronization of the receiver with the chaotic emitter is used to decode the message. This work focuses on the study of two crucial topics in the field of chaotic optical communications. The first topic is the synchronization of chaotic external-cavity laser diodes, which are among the most promising chaotic

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Daou, Andrea. "Real-time Indoor Localization with Embedded Computer Vision and Deep Learning." Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMR002.

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La localisation d'une personne ou d'un bien dans des environnements intérieurs est devenue une nécessité. Le système de positionnement par satellites, une solution prédominante pour la localisation en extérieur, rencontre des limites lorsqu'il est appliqué en intérieur en raison de la réflexion des signaux et de l'atténuation causée par les obstacles. Pour y remédier, diverses solutions de localisation en intérieur ont été étudiées. Les méthodes de localisation en intérieur sans fil exploitent les signaux pour déterminer la position d'un appareil dans un environnement intérieur. Cependant, l'i

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Silva, Tiago Sanches da. "Plataforma de estudo para determinação de conectividade cerebral embarcada e em tempo real." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-30062016-075729/.

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A presente dissertação examina um método de determinação da conectividade cerebral cujo uso vem se tornando popular nos últimos anos, o partial direct coherence (PDC), que se destaca dentre outros métodos por possibilitar a verificação das relações imediatas de sinais multivariados. Este método representa a conectividade cerebral no domínio da frequência e tem íntima relação com a noção de \"causalidade\" de Granger (GRANGER, 1969), que possibilita quantificar a influência mútua entre séries temporais observadas. De um ponto de vista computacional, o referido método faz uso de modelos de série

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Fauvet, Maxime. "Mécanismes centraux de contrôle de la motricité saine et altérée : rôle fonctionnel de la dynamique des couplages cortico-musculaires." Thesis, Toulouse 3, 2022. http://www.theses.fr/2022TOU30065.

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Le contrôle de l'activité motrice volontaire est un point de discussion important pour les personnes intéressées par le mouvement des êtres humains et qui est partagé entre le domaine de la biomécanique et celui du contrôle moteur exercé au niveau central. Il existe des théories valides qui modélisent les mécanismes mis en jeu, que ce soit au niveau de l'encéphale, de la moelle épinière ou des muscles, pour les deux approches. Cependant, il manque encore à ce jour une théorie unificatrice qui relierait les différents niveaux d'observation en un modèle global du contrôle moteur. C'est dans l'ob

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Duran, Denise, and Julia Ottosson. "Det gemensamma hälsofrämjande arbetet : En studie om hur det hälsofrämjande arbetet kan stärkas genom samverkan mellan elevhälsoteamet och fritidshemmet." Thesis, Högskolan i Gävle, Pedagogik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32705.

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Syftet med denna studie var att undersöka hur fritidshemmet och skolans elevhälsoteam arbetar utifrån ett hälsofrämjande perspektiv. Det för att synliggöra om ett behov av samverkan mellan fritidshemspersonal och elevhälsoteamet fanns och hur det gemensamma uppdraget kan verka stärkande för det hälsofrämjande uppdraget. Studiens frågeställningar löd: Hur beskrivs samverkan mellan fritidshemmets personal och skolans elevhälsoteam? På vilket sätt kan samverkan mellan fritidshem och elevhälsoteamet bidra till ett gemensamt hälsofrämjande arbete och verksamhet? Studien baserades på en online-enkä

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Kaphle, Manindra R. "Analysis of acoustic emission data for accurate damage assessment for structural health monitoring applications." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/53201/1/Manindra_Kaphle_Thesis.pdf.

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Structural health monitoring (SHM) refers to the procedure used to assess the condition of structures so that their performance can be monitored and any damage can be detected early. Early detection of damage and appropriate retrofitting will aid in preventing failure of the structure and save money spent on maintenance or replacement and ensure the structure operates safely and efficiently during its whole intended life. Though visual inspection and other techniques such as vibration based ones are available for SHM of structures such as bridges, the use of acoustic emission (AE) technique is

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Camp, Howard Alan. "Measurements of the time evolution of coherent excitation." Diss., Manhattan, Kan. : Kansas State University, 2005. http://hdl.handle.net/2097/73.

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Sugiura, Shinya. "Coherent versus non-coherent space-time shift keying for co-located and distributed MIMO systems." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/165759/.

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In this thesis, we propose the novel Space-Time Coding (STC) concept of Space-Time Shift Keying (STSK) and explore its characteristics in the contexts of both co-located and cooperative Multiple-Input Multiple-Output (MIMO) systems using both coherent and non-coherent detection. Furthermore, we conceive new serially-concatenated turbo-coding assisted STSK arrangements for the sake of approaching the channel capacity limit, which are designed with the aid of EXtrinsic Information Transfer (EXIT) charts. The basic STSK concept is first proposed for the family of co-located MIMO systems employing

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Jerebtsov, Serguei Nikolaevich. "Femtosecond time-resolved spectroscopy of coherent oscillations in nanomaterials." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1358.

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Pestov, Dmitry Sergeyevich. "Detection of bacterial endospores by means of ultrafast coherent raman spectroscopy." Texas A&M University, 2008. http://hdl.handle.net/1969.1/85958.

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This work is devoted to formulation and development of a laser spectroscopic technique for rapid detection of biohazards, such as Bacillus anthracis spores. Coherent anti-Stokes Raman scattering (CARS) is used as an underlying process for active retrieval of species-specific characteristics of an analyte. Vibrational modes of constituent molecules are Raman-excited by a pair of ultrashort, femtosecond laser pulses, and then probed through inelastic scattering of a third, time-delayed laser field. We first employ the already known time-resolved CARS technique. We apply it to the spectroscopy of

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