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Dissertations / Theses on the topic 'Doppler'

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1

Killich, Markus. "Tissue Doppler Imaging." Diss., lmu, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-67089.

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2

Searle, Stephen. "Matched doppler processing /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09AS/09ass439.pdf.

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3

Pawelka, Robert H. "Digitized Doppler Signal Processor." International Foundation for Telemetering, 1989. http://hdl.handle.net/10150/614677.

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International Telemetering Conference Proceedings / October 30-November 02, 1989 / Town & Country Hotel & Convention Center, San Diego, California<br>At the present time there is a requirement for developing an airborne approach for processing radar doppler video data into digital PCM format compatible with current IRIG standards. Techniques for digitizing the doppler video presently exist, but have limitations due to the fact that the data is processed and represented in the time domain. These limitations can be mainly attributed to the high bit rates required for quantizing the dynamic natur
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4

Fredriksson, Ingemar. "Quantitative Laser Doppler Flowmetry." Doctoral thesis, Linköpings universitet, Biomedicinsk instrumentteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19947.

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Laser Doppler flowmetry (LDF) is virtually the only non-invasive technique, except for other laser speckle based techniques, that enables estimation of the microcirculatory blood flow. The technique was introduced into the field of biomedical engineering in the 1970s, and a rapid evolvement followed during the 1980s with fiber based systems and improved signal analysis. The first imaging systems were presented in the beginning of the 1990s. Conventional LDF, although unique in many aspects and elegant as a method, is accompanied by a number of limitations that may have reduced the clinical imp
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5

Barba, Alessandra. "Effetto Doppler in astrofisica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Questo elaborato espone le caratteristiche principali dell'effetto Doppler e l'applicazione del suddetto in vari ambiti del settore astrofisico. La derivazione della formule è divisa nel caso classico in cui si studia il fenomeno rispetto alle onde acustiche, e il nel caso relativistico nel quale si studia l'effetto sulle onde elettromagnetiche. Le applicazioni astrofisiche prese in considerazione sono le seguenti: Redshift e Legge di Hubble nell'ambito cosmologico; allargamento Doppler delle linee spettrali nell'ambito della spettroscopia astronomica; stelle binarie spettroscopiche e MASER
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6

Cuoghi, Lorenzo. "Effetto Doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12830/.

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Nel corso del secolo XIX il fisico James Clerk Maxwell riassunse le leggi sull'elettromagnetismo nelle note equazioni che portano il suo nome, dalle quali è stato possibile estrapolare la natura ondulatoria della luce. Questa importantissima caratteristica, per la quale la luce è definita come onda elettromagnetica, implica una grande vastità di fenomeni di origine ondulatoria, tra i quali l'Effetto Doppler, il quale ha importantissime applicazioni nell'ambito astrofisico e cosmologico.
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7

Lauretta, Francesco. "Effetto doppler ed applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14767/.

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L’effetto doppler fu scoperto dall'austriaco Christian Johann Doppler che nel 1842 fece una pubblicazione, affermando che un oggetto luminoso deve cambiare colore se posto in moto rispetto ad un osservatore. Infatti notò, sfruttando un vagone con alcuni musicisti sopra, come il suono variasse in base al moto relativo tra vagone ed osservatore. Un'analisi più dettagliata mostrò che un ascoltatore in moto verso una sorgente sonora ferma rispetto al mezzo di trasmissione, riceve un suono di frequenza maggiore rispetto a quello che ascolterebbe se anche lui fosse a riposo. Viceversa la frequenza è
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8

Di, Benedetto Andrea. "Effetto Doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15821/.

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In questo trattato si parlerà dell'effetto doppler e di alcune delle sue applicazioni in astrofisica. Si distingueranno due casi a seconda delle velocità in gioco (relativistiche o meno) e si applicheranno le rispettive formule a diversi casi specifici per darne una spiegazione.
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9

Politi, Marialudovica. "Effetto Doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16160/.

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In questo elaborato si analizza l'Effetto Doppler e le sue applicazioni in astronomia. Nella prima parte viene analizzato il fenomeno tramite qualche passaggio prettamente matematico e fisico per arrivare ad una corretta formulazione generale del fenomeno. Nella seconda parte vi è l'applicazione vera e propria dell'effetto Doppler in ambito astrofisico.
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10

Maranzano, Matteo. "Effetto Doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/17068/.

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Viene trattato l'effetto Doppler nell'ambito classico, analizzando in che modo variano le caratteristiche di un'onda quando la sua sorgente e l'osservatore che la rileva si muovono uno rispetto all'altro. Una breve appendice tratterà,poi, dello stesso effetto nel regime relativistico. In seguito, si analizza come l'effetto Doppler venga utilizzato per determinare la massa delle stelle componenti un sistema binario spettroscopico, e come lo si utilizzi come scala di distanza cosmica sfruttando il così detto Redshift Cosmologico.
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11

Casavecchia, Benedetta. "Effetto Doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18767/.

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L’Effetto Doppler è il fenomeno fisico che descrive la variazione della frequenza osservata di un’onda quando la sorgente emittente e l’osservatore sono in moto relativo fra di loro. Esso può essere trattato in maniera classica, se l'onda ha una velocità di propagazione inferiore a quella della luce, o in maniera relativistica. In ambito astrofisico l'Effetto Doppler viene applicato alla radiazione elettromagnetica, unico segnale che ci giunge dai corpi celesti. Esso viene studiato tramite lo spostamento delle righe spettrali verso il rosso (redshift) o il blu (blueshift). Un'importante conseg
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12

Girolamodibari, Andrea. "Effetto Doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21208/.

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Una breve trattazione riguardante l'effetto Doppler. Prima verranno affrontati gli aspetti matematici e fisici del fenomeno, nella casistica delle onde sonore, poi tenendo in considerazione gli effetti relativistici, mediante l'utilizzo di formule e grafici. In seguito si proverà ad analizzare i svariati ambiti di applicazione dell'effetto, e mediante il suo utilizzo, si è arrivati e si arrivi a risultati concreti nel mondo della ricerca astrofisica e cosmologica.
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13

Chua, Cheng Lock Charles. "Doppler-only synthetic aperture radar." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FChua.pdf.

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Thesis (M.S. in Combat Systems Sciences and Technology)--Naval Postgraduate School, December 2006.<br>Thesis Advisor(s): Brett Borden, Donald Walters. "December 2006." Includes bibliographical references (p. 69-70). Also available in print.
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14

Walker, Andrew. "Testing of Doppler Ultrasound Systems." Doctoral thesis, Linköpings universitet, Fysiologisk mätteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-51213.

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Blood and tissue velocities are measured and analyzed in cardiac, vascular, and other applications of diagnostic ultrasound. Errors in system performance might give invalid measurements. We developed two moving string test targets and a rotating cylinder phantom (Doppler phantoms) to characterize Doppler ultrasound systems. These phantoms were initially used to measure such variables as sample volume dimensions, location of the sample volume, and the performance of the spectral analysis. Later, specific tests were designed and performed to detect errors in signal processing, causing time delay
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15

Hawkes, Graham S. "Three-dimensional doppler global velocimetry." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427619.

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16

Pannell, C. N. "Fibre-optic laser Doppler velocimetry." Thesis, University of Kent, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383370.

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17

Comani, Alice. "Effetto Doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24850/.

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18

Mary, Delphine Armengol Valérie. "Laser Doppler et diagnostic pulpaire." [S.l.] : [s.n.], 2006. http://theses.univ-nantes.fr/thesemed/CDmary.pdf.

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19

Bättig, Rainer. "Fiber optic Doppler velocimeter probes /." [S.l.] : [s.n.], 1988. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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20

Giannella, Giovanni. "Effetto doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7149/.

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21

Guidotti, Simone. "Effetto doppler e applicazioni astrofisiche." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7390/.

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22

Liu, Zenghai. "Interferometric filter planar Doppler velocimetry." Thesis, Cranfield University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539402.

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This thesis describes the development of a Mach-Zehnder interferometric filter based planar Doppler velocimetry (MZI-PDV) flow measurement technique. The technique uses an entirely new optical system, an unbalanced MZI incorporating glass blocks for wavefront-matching, to replace the iodine cell currently used in conventional PDV. The free spectral range of the interferometric filter can be selected by adjusting the optical path difference of the MZI. This allows the velocity measurement range, sensitivity and resolution to be varied. This system offers no restricts to the choice of laser wave
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23

Simonpietri, Caroline. "Techniques modernes en écho Doppler." Paris 5, 1997. http://www.theses.fr/1997PA05P158.

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24

Greil, Oliver. "Strömungsuntersuchung in Modellen humaner Karotisbifurkationen nach Stentimplantation mittels Laser-Doppler-Anemometrie und endoluminaler Doppler-Sonographie." [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962787213.

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25

Lindqvist, Per. "Right heart function in health and disease : a Doppler echocardiography and Doppler tissue imaging study /." Doctoral thesis, Umeå : Department of Public Health and Clinical Medicine, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-392.

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26

Walker, Andrew. "Performance testing of ultrasound Doppler equipment." Licentiate thesis, Linköping University, Linköping University, The Institute of Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-29499.

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<p>Blood and tissue velocities are measured and analysed in cardiac, vascular and other applications of diagnostic ultrasound. Errors in system performance might give invalid measurements.</p><p>We developed two moving string test targets (“Doppler phantoms”) to characterise ultrasound Doppler systems. These phantoms were initially used to measure such variables as sample volume dimensions, location of the sample volume, and the performance of the spectral analysis. Specific tests were done to detect errors in signal processing causing time delays and inaccurate velocity estimation.</p><p>Even
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27

Joncour, Isabelle. "Imagerie Doppler des étoiles T Tauri." Phd thesis, Université Paris-Diderot - Paris VII, 1994. http://tel.archives-ouvertes.fr/tel-00725018.

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Dans ce travail de thèse, nous analysons pour la première fois à l'aide de la technique d'imagerie doppler, les raies photosphériques de deux étoiles T Ttauri à faibles raies d'émission, pour cartographier leur brillance de surface et localiser ainsi les inhomogenéités en température, qui signent la présence de forts champs magnétiques. Pour ce faire, nous avons développé une méthode numerique fondée sur la paramétrisation de taches, dont les caractéristiques sont déterminées lors de la minimisation, de type moindres carrés, des différences entre les modèles de raie calculés et l'ensemble des
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28

Agirman, Handan. "Waveform Design For Pulse Doppler Radar." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606840/index.pdf.

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ABSTRACT WAVEFORM DESIGN FOR PULSE DOPPLER RADAR AgIRMAN, Handan M.S., Department of Electrical and Electronics Engineering Supervisor: Prof. Dr. Mete Severcan December 2005, 100 pages This study is committed to the investigation of optimum waveforms for a pulse doppler radar which uses a non linear high power amplifier in the transmitter. The optimum waveform is defined as the waveform with the lowest peak and integrated side lobe level, the narrowest main lobe in its autocorrelation and the narrowest bandwidth in its spectrum. The Pulse Compression method is used in radar systems si
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29

Aygar, Alper. "Doppler Radar Data Processing And Classification." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609890/index.pdf.

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In this thesis, improving the performance of the automatic recognition of the Doppler radar targets is studied. The radar used in this study is a ground-surveillance doppler radar. Target types are car, truck, bus, tank, helicopter, moving man and running man. The input of this thesis is the output of the real doppler radar signals which are normalized and preprocessed (TRP vectors: Target Recognition Pattern vectors) in the doctorate thesis by Erdogan (2002). TRP vectors are normalized and homogenized doppler radar target signals with respect to target speed, target aspect angle and target ra
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30

Halimi, Abderrahim. "From conventional to delay/Doppler altimetry." Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/10444/1/halimi.pdf.

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For more than twenty years, conventional altimeters like Topex, Poseidon-2 or Poseidon-3, have been delivering waveforms that are used to estimate many parameters such as the range between the satellite and the observed scene, the wave height and the wind speed. Several waveform models and estimation processing have been developed for the oceanic data in order to improve the quality of the estimated altimetric parameters. Moreover, a great effort has been devoted to process coastal echoes in order to move the altimetric measurements closer to the coast. In this thesis, we are interested in res
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31

Lange, Marcos Christiano. "Embolia paradoxal avaliada pelo Doppler Transcraniano." reponame:Repositório Institucional da UFPR, 2011. http://hdl.handle.net/1884/26288.

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Resumo: O Doppler transcraniano contrastado (DTCc) é um método diagnóstico utilizado com frequência na investigação da embolia paradoxal (EP) e do forame oval patente (FOP). Apesar da padronização do método, inúmeros questionamentos existem em relação a metodologia utilizada, entre as quais, a solução contrastante ideal, o momento de realização da manobra de Valsalva (MV) durante o exame sensibilizado e marcadores que diferenciem entre a EP devido o FOP e outras EPs, preferencialmente as extracardíacas. Este estudo teve como objetivos: 1) comparar a positividade de EP pelo DTCc com o uso de du
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32

Kamiya, Carla Priscila [UNESP]. "Estudo Power Doppler das lesões mamárias." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/99244.

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Made available in DSpace on 2014-06-11T19:29:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-02-18Bitstream added on 2014-06-13T19:59:57Z : No. of bitstreams: 1 kamiya_cp_me_botfm.pdf: 892360 bytes, checksum: b3e0867e3c536c34f6c7298680175be9 (MD5)<br>Avon<br>A ultra-sonografia mamária tem sido um método padrão complementar à mamografia há mais de dez anos. Permite o detalhamento da morfologia capaz de diferenciar lesões benignas de malignas. A angiogênese tumoral é crítica para o crescimento autônomo e desenvolvimento do câncer de mama. A alteração hemodinâmica que acompanha tal an
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33

Rajan, Vinayakrishnan. "Speckles in laser doppler perfusion imaging." Enschede : University of Twente [Host], 2007. http://doc.utwente.nl/58017.

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34

Lu, Zenghai. "Interferometric filter-based planar Doppler velocimetry." Thesis, Cranfield University, 2008. http://dspace.lib.cranfield.ac.uk/handle/1826/7151.

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This thesis describes the development of a Mach-Zehnder interferometric filter based planar Doppler velocimetry (MZI-PDV) flow measurement technique. The technique uses an entirely new optical system, an unbalanced MZI incorporating glass blocks for wavefront-matching, to replace the iodine cell currently used in conventional PDV. The free spectral range of the interferometric filter can be selected by adjusting the optical path difference of the MZI. This allows the velocity measurement range, sensitivity and resolution to be varied. This system offers no restricts to the choice of laser wave
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35

Fredriksen, Tonje Dobrowen. "Quantitative Doppler Methods in Cardiovascular Imaging." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for sirkulasjon og bildediagnostikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27300.

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Ultrasound imaging of blood flow in the heart and blood vessels has become an essential part of diagnosing diseases related to the circulatory system. By using different Doppler methods, the blood flow may be visualized or quantified. In this work we take advantage of the opportunities given by the introduction of parallel processing of ultrasound data to develop new quantitative Doppler methods. Pulsed wave (PW) Doppler is a technique for measuring blood velocities, providing the full velocity spectrum in a specific region of interest. The maximum velocities may be found by delineation of the
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36

McConnell, B. A. "Neurodevelopmental outcome and prenatal Doppler performance." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390885.

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37

Christensen, John Kenneth. "Doppler signatures from canonical rotating targets." Thesis, University of Surrey, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411384.

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38

Dooley, Saul. "Subsample time delay and Doppler estimation." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248768.

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39

Heine, Matthew K. "Doppler shifts in the KATRIN experiment." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44462.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.<br>"June 2008."<br>Includes bibliographical references (p. 83-84).<br>In the past few decades, neutrinos, which are predicted to be massless particles by the Standard Model of Particle Physics, have been shown to have non-zero mass. The absolute scale of this neutrino mass has significant implications in particle physics, astrophysics, and cosmology. The KATRIN experiment is designed to measure this absolute scale by examining the beta decay spectrum of molecular, gaseous tritium source. In this thesis, the beta deca
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40

Smith, G. E. "Radar target micro-Doppler signature classification." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/18688/.

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This thesis reports on research into the field of Micro-Doppler Signature (μ-DS) based radar Automatic Target Recognition (ATR) with additional contributions to general radar ATR methodology. The μ-DS based part of the research contributes to three distinct areas: time domain classification; frequency domain classification; and multiperspective μ-DS classification that includes the development of a theory for the multistatic μ-DS. The contribution to general radar ATR is the proposal of a methodology to allow better evaluation of potential approaches and to allow comparison between different s
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41

Carpenter, James. "Low bandwidth laser Doppler blood flowmetry." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14267/.

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Laser Doppler Blood Flowmetry (LDBF) has for several decades been applied to measure the flow of red blood cells in living tissue. Laser Doppler Perfusion Imaging (LDPI), a recent advancement which enables full-field blood flow visualisation, is gaining clinical acceptance in fields such as burn diagnostics. However, video-rate full-field imagers with appropriate sensor and processing capability require large financial and physical resources and this has prompted the development of under-specified systems. These systems may reduce the bandwidth and processing complexity but the question of how
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Tannergren, Tomas. "Determining Orbits through Doppler Shift Observation." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200515.

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Kamiya, Carla Priscila. "Estudo Power Doppler das lesões mamárias /." Botucatu : [s.n.], 2009. http://hdl.handle.net/11449/99244.

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Orientador: Gilberto Uemura<br>Banca: José Ricardo P. Rodrigues<br>Banca: Ivo Carelli Filho<br>Resumo: A ultra-sonografia mamária tem sido um método padrão complementar à mamografia há mais de dez anos. Permite o detalhamento da morfologia capaz de diferenciar lesões benignas de malignas. A angiogênese tumoral é crítica para o crescimento autônomo e desenvolvimento do câncer de mama. A alteração hemodinâmica que acompanha tal angiogênese fornece base para o estudo das lesões no Doppler US O estudo Doppler US permite a análise de parâmetros objetivos do fluxo como sinais de fluxo, velocidade má
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44

Maillard, André. "Le doppler trans-cranien en neurochirurgie." Toulouse 3, 1992. http://www.theses.fr/1992TOU31508.

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45

JONCOUR, ISABELLE. "Imagerie doppler des etoiles t tauri." Paris 7, 1994. http://www.theses.fr/1994PA077352.

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Dans ce travail de these, nous analysons pour la premiere fois a l'aide de la technique d'imagerie doppler, les raies photospheriques de deux etoiles t tauri a faibles raies d'emission, pour cartographier leur brillance de surface et localiser ainsi les inhomogeneites en temperature, qui signent la presence de forts champs magnetiques. Pour ce faire, nous avons developpe une methode numeriaue fondee sur la parametrisation de taches, dont les caracteristiques sont determinees lors de la minimisation, de type moindres carres, des differences entre les modeles de raie calcules et l'ensemble des r
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46

Hong, Xichun. "Doppler Shifted Fourier Transform Emission Spectroscopy /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487929745336654.

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47

Iverson, Thomas Z. "Signature Stability in Laser Doppler Vibrometry." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1497386740815576.

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48

Unruh, Yvonne Christine. "Doppler imaging of late-type stars." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260022.

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49

Yang, Jie. "Doppler and acceleration invariant pulse compression." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2007. http://wwwlib.umi.com/cr/syr/main.

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50

Chester, David B. "A Parameterized Simulation of Doppler Lidar." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6794.

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Upcoming missions to explore planetary bodies in the solar system will require accurate position and velocity data during descent in order to land safely at a predesignated site. A Doppler lidar instrument could provide measurements of the altitude, attitude, and velocity of the landing vehicle to supplement the data collected by other instruments. A flexible simulation tool would aid the tasks of designing and testing the functionality of such an instrument. LadarSIM is a robust parameterized simulation tool developed for time of flight lidar at Utah State University's Center for Advanced Ima
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