Dissertations / Theses on the topic 'Tonte'
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Gérin-Lajoie, José. "Emprises autoroutières du sud du Québec : diversité végétale et effet de la fréquence de tonte /." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 2002. http://www.uqtr.ca/biblio/notice/resume/03-2241045R.html.
Full textEn-tête de t. : Université du Québec. Mémoire présenté sous forme de 2 articles scientifiques qui seront soumis soit au Canadian Journal of Bottany (Chapitre I) ainsi que Canadian Journal of Plant Science (Chapitre II)". CaQTU CaQTU Comprend des références bibliogr.
Gérin-Lajoie, José. "Emprises autoroutières du sud du Québec : diversité végétale et effet de la fréquence de tonte." Thèse, Université du Québec à Trois-Rivières, 2002. http://depot-e.uqtr.ca/2572/1/000694567.pdf.
Full textGodin, Marie-Andrée. "Toute est dans toute : sorcelleries et féminismes." Master's thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/29472.
Full textZhang, Zheng-sheng. "Tone and tone sandhi in Chinese." online access from Digital dissertation consortium, 1988. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?8907344.
Full textPham, Hoa T. "Vietnamese tone, tone is not pitch." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ63689.pdf.
Full textMiller, Heather Anne. "Tonto and Tonto speak an indigenous based film theory /." Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/miller/MillerH0506.pdf.
Full textHartmann, Katharina. "Focus and Tone." Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2008/1972/.
Full textBanterle, Francesco. "Inverse tone mapping." Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/55447/.
Full textChan, Lee Lee L. "Fuzhou Tone Sandhi /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9935444.
Full textMonclair, Christen, and Alexander Jacobsson. "Fastighetsanalys för Södra Cell Tofte." Thesis, Karlstad University, Division for Business and Economics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-6284.
Full textSchamberger, Anja. "Eine Torte für das Lesen." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1220525650449-87363.
Full textKarlsson, Christoffer, and Lukas Schachtschabel. "Legible Tone Mapping : An evaluation of text processed by tone mapping operators." Thesis, Blekinge Tekniska Högskola, Institutionen för kreativa teknologier, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12748.
Full textD'Oyley, Heather M. "Vasodilators and venous tone." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27871.
Full textMedicine, Faculty of
Anesthesiology, Pharmacology and Therapeutics, Department of
Graduate
Bao, Zhiming. "The structure of tone /." New York [u.a.] : Oxford Univ. Press, 1999. http://www.loc.gov/catdir/enhancements/fy0602/99019275-d.html.
Full textIghoroje, Ahbor Dolly Awani. "pH and vascular tone." Thesis, University of Glasgow, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293493.
Full textVančura, Jan. "Tone-mapping HDR obrazů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237159.
Full textMwita, Leonard Chacha. "Verbal tone in Kuria." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1666904901&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Full textPulleyblank, Douglas George. "Tone in lexical phonology /." Dordrecht : Boston ; Lancaster : Netherlands ; GB : D. Reidel, 1986. http://catalogue.bnf.fr/ark:/12148/cb34931840s.
Full textTsay, Jane S. "Tone Alteration in Taiwanese." Department of Linguistics, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/227272.
Full textSalomoni, David. "Ecriture toute optique de dispositifs spintroniques." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALY008.
Full textThe evolution of computer memory has led to a multilevel hierarchy, balancing speed, storage density, and cost. As Complementary Metal Oxide Semiconductor (CMOS) memory limits are approached, interest grows in nonvolatile alternatives like Magnetic Random Access Memory (MRAM). Although perpendicular spin transfer torque (p-STT-MRAM) is already in production, alternative technologies such as spin orbit torque (SOT) are explored for high-speed and fast cache operation. However, SOT has drawbacks, such as a larger bit-cell area and the need for an applied magnetic field for deterministic switching. In the pursuit of faster, more efficient memory, all-optical switching (AOS) technology seeks to achieve magnetization reversal through energy-efficient ultrafast writing with single-femtosecond laser pulses.This Ph.D. thesis addresses the objective of merging helicity-independent HI-AOS with MRAM devices. The materials investigated are rare-earth transition-metal multilayer systems, with a particular focus on Tb/Co-based structures. Through a combination of experimental investigations and numerical simulations, we unraveled the intricate dynamics of HI-AOS and used them to develop functional nanometer-sized AOS Magnetic Tunnel Junctions (AOS-MTJs). These results not only deepen our understanding of HI-AOS but also explore its applications in non-volatile data storage and energy-efficient computation at the nanoscale.The exploration of HI-AOS in thin films of rare-earth transition metal multilayer systems lays the foundation for reliable magnetization toggle reversal, exploring the response to different pulse durations and fluences. Key new findings include the observation of concentric rings with opposite magnetic orientations and the independence of fluence on pulse duration, challenging existing paradigms. A hypothesis emphasizing the role of local anisotropy decrease that favors a precessional type of HI-AOS is introduced.The development of a macrospin model, incorporating Two-Temperature Model (2TM) principles, explains the precession-driven switching mechanism observed in the Tb/Co-based multilayer system. Simulations reveal dynamics influenced by parameters such as Gilbert damping, anisotropy tilt angle, and the quality factor Q. Atomistic simulations further validate the model's predictions, emphasizing the significance of temperature-dependent magnetization and anisotropy effects in the HI-AOS process.Practical applications require the fabrication and electrical characterization of MTJ devices. Optimization of Tunnel Magnetoresistance (TMR) values, reaching a maximum value of 74%, a significant improvement over previous demonstrations. The thesis main achievement was demonstrating field-free HI-AOS on 100 nm diameter patterned [Tb/Co] p-MTJ devices, using 50 fs laser pulses with an estimated absorbed energy of approximately 68.6 fJ per bit reversal. The research not only contributes to our understanding of HI-AOS but also opens future research paths. Recommendations for future directions include using atomistic and LLB models for a more comprehensive understanding, exploring alternative materials beyond Tb/Co, investigating deterministic switching using Spin Transfer Torque, and addressing device variability challenges.The thesis offers a comprehensive exploration of HI-AOS, from its fundamental mechanisms to practical applications in nonvolatile data storage and energy-efficient computation. The optimized TMR values and successful demonstration of AOS in nanopatterned devices are a first step toward a new memory technology. The use of both experimental and simulated methods strengthens the importance of the obtained results for further progress in this area.In summary, this doctoral research not only has expanded the knowledge of helicity-independent all-optical switching but has also laid the foundation for innovative applications in nanoscale technology
Kate, Albertus Aemilius Seyno ten. "Avec dévouement total la lutte de Dieu contre toute puissance: origine et évolution de la toute-puissance /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2001. http://dare.uva.nl/document/84569.
Full textHsieh, Feng-fan. "Relational correspondence in tone sandhi." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41698.
Full textIncludes bibliographical references (p. 283-292).
This dissertation proposes that the constraint component of OT grammars should be expanded to include a family of faithfulness constraints that evaluate input-output/output-output mappings for the preservation of gross Fo contours (rising, falling, level) across two or more segments. Following Steriade (2006), I refer to constraints in this family as Relational Correspondence constraints. The central tenet of Relational Correspondence is that phonological processes are shaped by pressure to maintain perceptual similarity between correspondent relations between successive elements, or syntagmatic contrast preservation in the auditory domain Fo, as opposed to paradigmatic contrast preservation according to which the well-formedness of an entity is evaluated with reference to the set of entities it contrasts with. Two types of Relational Correspondence are distinguished in this work: Contour and Slope Correspondence. Contour Correspondence, formulated as RELCORR constraints, assesses correspondence of the phonological height (Fo scaling) relation between successive tones. Four height relations are proposed for the tonal contour: "greater than" (x>y), "less than" (x
Ph.D.
Sietsema, Brian Mark. "Metrical dependencies in tone assignment." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14226.
Full textBao, Zhiming. "On the nature of tone." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/14143.
Full textWilson, Brian George. "5-tone ZVEI encoder analyser." Thesis, Cape Technikon, 1993. http://hdl.handle.net/20.500.11838/1141.
Full textThis thesis describes the development of a 5-Tone Zentral Verband Electrotechische Industrie eZVEI) Encoder Analyser. The 5-Tone ZVEI Encoder Analyser is used by the Radio Section of the Test and Metering Branch, which falls under the Electricity Department of the Cape Town City Council. It assists the Quality Assurance Technician in determining whether the 5 tone ZVEI encoder, of the radio under test, is operating within the manufacturers specifications. Various manufacturers of radio equipment tender for the supply of mobile radios fitted with ZVEI tone The Radio Section are now capable of testing encoders. all the various radios and comparing the analysed ZVEI specifications of each manufacturer's radio. The results can be used to assist management in deciding which radio would be the most suitable for purchasing. The development of the 5-Tone ZVEI Encoder Analyser involved the design and development of hardware and software. It was designed to be housed in a compact enclosure and to interface to a Motorola Communications System Analyser Model R-2001C. The RF output, from the radio under test, connects to the RF input of the Communications System Analyser. The demodulated output of the Communications System Analyser connects to the input of the 5-Tone ZVEI Encoder Analyser. The softwa~e was designed using PLM-51 high level language to p~ovide ~eal-time analysis of va~ious selective-calls (selcalls) ~eceived f~om the demodulated output of the Communications System Analyser. Once all 5 tones of the ZVEI selcall have been analysed the software background task is flagged and the analysed results a~e displayed as various MODES of display on a 16 cha~acte~ by 4 line dot matrix display. The following parameters of the ZVEI selcall a~e analysed: i) Frequency Digits. ii) Frequency fo~ each of the 5 tones. iii) Tone Duration for each of the 5 tones. iv) Frequency Error for the 5 tones. v) Tone Duration Er~or for the 5 tones. The design and development of the 5-Tone ZVEI Encode~ Analyser was conducted at the Computer Section of the Electricity Depa~tment, Cape Town City Council.
Nejezchleb, Ivan. "Tone-mapping pro HDR obrazy." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-236674.
Full textLawson, Michael Wayne. "Relationship Between Line and Tone." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83777.
Full textMaster of Architecture
Murnane, Owen D., Faith W. Akin, and T. Medley. "Tone-Evoked Vestibular Myogenic Potentials." Digital Commons @ East Tennessee State University, 2002. https://dc.etsu.edu/etsu-works/1911.
Full textPeng, Long. "A unified theory of tone-voice." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185871.
Full textStoffle, Richard W. "Tonto National Monument Cultural Landscape Assessment Presentation." Bureau of Applied Research in Applied Anthropology, University of Arizona, 2009. http://hdl.handle.net/10150/292645.
Full textMoseley, Brian Christopher. "Twelve-Tone Cartography| Space, Chains, and Intimations of "Tonal" Form in Anton Webern's Twelve-Tone Music." Thesis, City University of New York, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3601934.
Full textThis dissertation proposes a theory and methodology for creating musical spaces, or maps, to model form in Webern’s twelve-tone compositions. These spaces are intended to function as “musical grammars,” in the sense proposed by Robert Morris. And therefore, significant time is spent discussing the primary syntactic component of Webern’s music, the transformation chain, and its interaction with a variety of associational features, including segmental invariance and pitch(-class) symmetry. Throughout the dissertation, these spaces function as an analytical tools in an exploration of this music’s deep engagement with classical formal concepts and designs. This study includes analytical discussions of the Piano Variations, Op. 27 and the String Quartet, Op. 28, and extended analytical explorations of the second movement of the Quartet, Op. 22, and two movements from the Cantata I, Op. 29.
Mar, Li-Ya. "covert contrast| The acquisition of Mandarin tone 2 and tone 3 in L2 production and perception." Thesis, The University of Wisconsin - Milwaukee, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10123605.
Full textThis dissertation investigates the occurrence of an intermediate stage, termed a covert contrast, in the acquisition of Mandarin Tone 2 (T2) and Tone 3 (T3) by adult speakers of American English. A covert contrast is a statistically reliable distinction produced by language learners that is not perceived by native speakers of the target language (TL). In second language (L2) acquisition, whether a learner is judged as having acquired a TL phonemic contrast has largely depended on whether the contrast was perceived and transcribed by native speakers of the TL. However, categorical perception has shown that native listeners cannot perceive a distinction between two sounds that fall within the same perceptual boundaries on the continuum of the relevant acoustic cues. In other words, it is possible that native speakers of the TL do not perceive a phonemic distinction that is produced by L2 learners when that distinction occurs within a phonemic boundary of TL.
The data for the study were gathered through two elicitations of tone production, a longitudinal analysis, and two perception tasks. There were three key findings. First, both elicitations showed that most of the L2 participants produced a covert contrast between T2 and T3 on at least one of the three acoustic measures used in the study. Second, the longitudinal analysis reveals that some L2 participants progressed from making a covert contrast to a later stage of implementing an overt one, thereby supporting the claim that making a covert contrast is an intermediate stage in the process of acquiring a L2 phonemic contrast. Third, results of the perceptual tasks showed no reliable difference in identifying and discriminating Mandarin T2 and T3 on the part of the L2 learners who produced a covert contrast and those who produced an overt contrast, indicating that there was no reliable difference in the two groups’ ability to perceive the target tones.
In all, the occurrence of a covert contrast in the process of acquiring Mandarin T2 and T3 suggests that L2 acquisition of a tonal contrast is a gradient process, one in which an intermediate step occurs before a L2 learner reaches the final stage of implementing an overt contrast that is perceived as target-like by the native speakers of the TL.
Lui, Yik-yee Jessica. "Cantonese tone perception in young children." Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/hkuto/record/B36207597.
Full text"A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, May 10, 2000." Also available in print.
Bartram, Cathryn Virginia. "An investigation of tone in Walungge." Thesis, SOAS, University of London, 2011. http://eprints.soas.ac.uk/14184/.
Full textYiu, Suet-yee, and 姚雪儀. "Aspects of tone in Cantonese English." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/211151.
Full textYuzawa, Nobuo. "The rise-fall tone in English." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250642.
Full textSamba, Philippe. "The system of tone in Kikongo." Thesis, Lancaster University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292088.
Full textCoe, J. Y. "Alteration of neonatal pulmonary vascular tone." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381381.
Full textCochran, Jennie E. (Jennie Eleanor) 1981. "Learning Internet from tone of voice." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28383.
Full textIncludes bibliographical references (leaf 56).
The ability to discern information from the tone of voice that a person uses is an important part of social interactions. Synthetic characters that can interact naturally with humans could take advantage of this information if they could discern it. I propose that a synthetic character with a vocalization affect classifier and the ability to learn associations can use the tone of voice of the person interacting with her to predict what the person is going to do. In this approach the classifier learns to distinguish tones in real time allowing the character to adapt to new tones. I describe the implementation of the system, called Minimus T.O. Mouse, and its extensions from previous affect classifying systems and previous synthetic characters.
by Jennie E. Cochran.
M.Eng.
Staněk, Jiří. "Metody temporálního tone-mappingu HDR videa." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2019. http://www.nusl.cz/ntk/nusl-403155.
Full textIoan, Cristina. "Developing the flute tone through singing." Master's thesis, Universidade de Aveiro, 2007. http://hdl.handle.net/10773/1140.
Full textEste estudo pretende propor um método alternativo para melhorar o som na execução da flauta utilizanto elementos da técnica vocal. É uma pesquisa interdisciplinar que consiste em desenvolver, experimentar e analisar exercícios e métodos para estudar flauta através do canto. ABSTRACT: This music study whants to propose an alternative method for developing the flute tone by using singing techniques. It is a piece of interdisciplinary reasearch consisting in developing, experimenting, and analyzing exercises and methods for practicing flute through singing.
Boitard, Ronan. "Temporal coherency in video tone mapping." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S060/document.
Full textOne of the main goals of digital imagery is to improve the capture and the reproduction of real or synthetic scenes on display devices with restricted capabilities. Standard imagery techniques are limited with respect to the dynamic range that they can capture and reproduce. High Dynamic Range (HDR) imagery aims at overcoming these limitations by capturing, representing and displaying the physical value of light measured in a scene. However, current commercial displays will not vanish instantly hence backward compatibility between HDR content and those displays is required. This compatibility is ensured through an operation called tone mapping that retargets the dynamic range of HDR content to the restricted dynamic range of a display device. Although many tone mapping operators exist, they focus mostly on still images. The challenges of tone mapping HDR videos are more complex than those of still images since the temporal dimensions is added. In this work, the focus was on the preservation of temporal coherency when performing video tone mapping. Two main research avenues are investigated: the subjective quality of tone mapped video content and their compression efficiency. Indeed, tone mapping independently each frame of a video sequence leads to temporal artifacts. Those artifacts impair the visual quality of the tone mapped video sequence and need to be reduced. Through experimentations with HDR videos and Tone Mapping Operators (TMOs), we categorized temporal artifacts into six categories. We tested video tone mapping operators (techniques that take into account more than a single frame) on the different types of temporal artifact and we observed that they could handle only three out of the six types. Consequently, we designed a post-processing technique that adapts to any tone mapping operator and reduces the three types of artifact not dealt with. A subjective evaluation reported that our technique always preserves or increases the subjective quality of tone mapped content for the sequences and TMOs tested. The second topic investigated was the compression of tone mapped video content. So far, work on tone mapping and video compression focused on optimizing a tone map curve to achieve high compression ratio. These techniques changed the rendering of the video to reduce its entropy hence removing any artistic intent or constraint on the final results. That is why, we proposed a technique that reduces the entropy of a tone mapped video without altering its rendering
Liu, Chun Hung. "Bit-depth expansion and tone mapping /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?ECED%202008%20LIU.
Full textCorreia, Marcelo Lima De Gusmao. "Sympathetic vascular tone in human obesity." Diss., University of Iowa, 2007. http://ir.uiowa.edu/etd/134.
Full textWilson, Darren. "pH and vascular smooth muscle tone." Thesis, University of Bath, 1997. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362288.
Full textStringer, Katherine Elizabeth. "Subverted modernism: Korngold's Die tote Stadt." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12232.
Full textUsing the 1920 opera Die tote Stadt as its primary case in point, this thesis interrogates the pervasive notion that the Austrian-born composer Erich Wolfgang Korngold (1897-1957) refused to acknowledge Modernist trends, dialogues and aesthetics in his works for the stage, and instead held fast to late-Romantic aesthetics and philosophies at the expense of engaging directly with contemporary culture and politics. I show evidence to the contrary, that Komgold was in fact actively involved with the intellectual, artistic and socio-political discourse of his time, and that this engagement is manifest in his opera, which draws parallels between the city of Bruges, setting of Die tote Stadt's source material, Georges Rodenbach's 1892 novel Bruges-la-morte, and Vienna, the composer's hometown, as it was at the close of the First World War. In substantiating this claim, I first of all seek to place the composer in his proper context as a child offin-de-siecle Vienna, and the son of that city's leading conservative music critic, the influential and much-feared Julius Komgold, successor to Eduard Hanslick at the Neue Freie Presse. I also interrogate lingering assumptions about the composer's lack of socio-political engagement owing to his status as a former child prodigy, famous across Europe for his preternatural musical gifts. I also explore the specific, alterations, additions and excisions made by the composer to his source material in translating it to the musical stage, and discuss how those changes reflect his compositional and socio-political ethos. Finally, I analyze portions of Die tote Stadt and discuss how a composer's late-Romantic compositional language can in fact indicate Modernist sympathies, albeit in their own specific strain, before sketching a brief reception history of this opera in particular, the composer's works in general, as well as discussing how this work might be reassessed and rehabilitated into the "art music" canon.
Goswami, Abhishek. "Content-aware HDR tone mapping algorithms." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG013.
Full textThe ratio between the brightest and the darkest luminance intensity in High Dynamic Range (HDR) images is larger than the rendering capability of the output media. Tone mapping operators (TMOs) compress the HDR image while preserving the perceptual cues thereby modifying the subjective aesthetic quality. Age old painting and photography techniques of manual exposure correction has inspired a lot of research for TMOs. However, unlike the manual retouching process based on semantic content of the image, TMOs in literature have mostly relied upon photographic rules or adaptation principles of human vision to aim for the 'best' aesthetic quality which is ill-posed due to its subjectivity. Our work reformulates the challenges of tone mapping by stepping into the shoes of a photographer, following the photographic principles, image statistics and their local retouching recipe to achieve the tonal adjustments. In this thesis, we present two semantic aware TMOs – a traditional SemanticTMO and a deep learning-based GSemTMO. Our novel TMOs explicitly use semantic information in the tone mapping pipeline. Our novel GSemTMO is the first instance of graph convolutional networks (GCN) being used for aesthetic image enhancement. We show that graph-based learning can leverage the spatial arrangement of semantic segments like the local masks made by experts. It creates a scene understanding based on the semantic specific image statistics a predicts a dynamic local tone mapping. Comparing our results to traditional and modern deep learning-based TMOs, we show that G-SemTMO can emulate an expert’s recipe and reach closer to reference aesthetic styles than the state-of-the-art methods
Fenner, Patti R. "RIPARIAN PHOTOPOINT PROGRAM ON THE TONTO NATIONAL FOREST." Arizona-Nevada Academy of Science, 2015. http://hdl.handle.net/10150/621695.
Full textMarrache-Gouraud, Myriam. ""Hors toute intimidation" : Panurge ou la parole singulière." Poitiers, 2000. http://www.theses.fr/2000POIT5020.
Full textBin, Ngah Lufti Arif. "Synchronisation toute optique d’un réseau de communication quantique." Thesis, Nice, 2015. http://www.theses.fr/2015NICE4141/document.
Full textThis manuscript reports the development of fundamental resources for long distance quantum communication based on fibre telecom technology and non-linear optical waveguides. After a general introduction on quantum communication, the thesis is structured along three parts. The first part illustrates the development of two photonic polarization entanglement sources suitable for quantum networking. Both sources generate paired photons at telecom wavelength via spontaneous parametric down conversion (SPDC) in periodically poled lithium niobate waveguides (PPLN/W). They rely on type-II and type 0 phase matching, respectively. In the second part, two high quality heralded single photon sources are highlighted. The first one relies on on-chip generation and spatial multiplexing of heralded single photons towards achieving higher bit rates. The second one takes advantage of passive temporal multiplexing of a single SPDC process. Finally, an all-optical approach towards efficient and accurate synchronization of remote entangled photon pair sources within quantum relay architecture over long distances is presented. This particular synchronization technique highlights the use of ultra-fast picosecond pulsed telecom fiber laser, operating at 2.5 GHz repetition rate, acting as a master optical clock, enabling to accurately synchronize the emission of photon pairs in the telecom C-band of wavelengths at two remote locations. This innovative approach is applied for synchronizing two remote PLLN/W based sources operated at 2.5 GHz, and preliminary results on two-photon interference obtained with single photons coming from each source are shown and discussed