Relevant bibliographies by topics / Noice spectroscopy / Dissertations / Theses
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Dissertations / Theses on the topic 'Noice spectroscopy'

Author: Grafiati
Published: 10 March 2023
Last updated: 31 July 2025

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1

Costantino, Mauro. "Low-frequency noise spectroscopy as an effective tool for electric transport analysis." Doctoral thesis, Universita degli studi di Salerno, 2018. http://elea.unisa.it:8080/xmlui/handle/10556/4375.

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2016 - 2017<br>In this work, several experiments and analyses performed by means of noise spectroscopy, on a broad typology of materials and compounds, are presented. Structural, DC electrical transport and noise properties are exposed for each investigated sample, and theoretical models and possible explanations of the experimental results are given to unravel physical phenomena. In particular, two distinct types of iron-chalcogenide superconductors are investigated, in their pristine and aged state, suggesting the more likely mechanism which generates the resistance fluctuations and resortin
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2

Pedurand, Richard. "Instrumentation for Thermal Noise Spectroscopy." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1356.

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La résolution des interféromètres gravitationnels est limitée par le mouvement Brownien - ou bruit thermique - de leurs miroirs dans la partie centrale de leur bande de détection, entre 10Hz et 1kHz. La répartition en fréquence de ce bruit thermique est dictée par les mécanismes de dissipation d'énergie mécanique à l'origine de cette vibration aléatoire, en accord avec le théorème fluctuation-dissipation. Cette dissipation provient principalement des revêtements optiques déposés sur les miroirs pour leur donner leur réflectivité. Dans le but de réduire le bruit thermique, une nouvelle générati
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3

Liu, Shikang. "Spin noise spectroscopy in metatable helium." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASP051.

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Cette thèse porte principalement sur la spectroscopie de bruit de spin de l'hélium métastable.Nous rapportons pour la première fois dans cette thèse la mesure du bruit de spin spontané d'un ensemble d'atomes d'hélium métastable en utilisant la spectroscopie de bruit de spin non invasive.Nous utilisons un laser hors résonance pour étudier les fluctuations aléatoires des sous-niveaux Zeeman du niveau métastable de l'hélium sous un champ magnétique relativement faible d'environ 1 Gauss. De plus, nous examinons les changements dans le spectre lorsque la sonde s'approche de la résonance.Nous étudio
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4

Nafaa, Beya. "Etude du bruit électrique basse fréquence dans des technologies CMOS avancées." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC273/document.

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Les travaux réalisés pendant cette thèse se focalisent sur l'étude de transistors double grille UTBOX complètement délpétés fabriqués pour le nœud technologique 16 nm. Les performances de ces composants en courant continu et en fonction de la température ont été évaluées. Les pièges localisés dans le film de silicium ont été identifiés à l’aide de la spectroscopie de bruit basse fréquence, donnant ainsi la possibilité d'évaluer les étapes de fabrications afin de les optimiser. Un pic inhabituel de transconductance a été observé dans les caractéristiques de transfert obtenues à faibles températ
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5

Sung, Youngkyu. "Non-Gaussian noise spectroscopy with superconducting qubits." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120365.

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Thesis: S.M. in Computer Science and Engineering, Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 91-95).<br>Most quantum control and quantum error-correction protocols assume that the noise causing decoherence is described by Gaussian statistics. However, the Gaussianity assumption break
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6

Vartabi, Kashanian Samir. "Spectroscopie de bruit avec de grands nuages d'atomes froids." Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4059/document.

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Nuage d'atomes de rubidium refroidi par laser. Ces mesures fournissent des informations sur la sourceet sur le milieu de propagation. Je considère une configuration particulière en transmission, le laserse propageant au travers du nuage atomique. Cette géométrie est pertinente pour étudier différentespropriétés, comme le mouvement des atomes. Cependant, le bruit intrinsèque du laser a unecontribution importante sur les spectres de bruit. Ce bruit technique peut alors devenir gênant pourextraire le signal étudié et une bonne compréhension du phénomène est donc essentielle.Expérimentalement, les
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7

Dang, Dung Do. "Tuneable Diode Laser Absorption Spectroscopy with Optical Fiber : Noise Analysis and Noise Reduction." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13089.

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A prototype of a fiber based absorptionspectroscopy instrument is built. A single mode fiber pigtailDistributed Feedback laser (DFB) is used to scan a known$mbox{NH}_3$ absorption line near $1512nm$ ($6614cm^{-1}$). $2mm$diameter InGaAs PIN photodiodes are used to convert the light signalto electrical signals by use of special designed transimpedanceamplifiers. Laser modulation, coherent detection at twice themodulation frequency (second harmonic detection), other electronics,and digital signal processing are provided by Norsk Elektrooptikk.bigskip The DFB laser from NEL (NLK1S5EAAA) delivers
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8

Chen, Zilong 1981. "Towards qubit noise spectroscopy by quantum bang-bang control." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/32721.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, June 2004.<br>Includes bibliographical references (p. 89-91).<br>Quantum bang-bang control is a method of suppressing decoherence in qubits [VKL99, VL98]. To date, mathematically rigorous treatments of quantum bang-bang control offered little intuition. To complement existing approaches and to seek better understanding, I present intuitive pictures to think about quantum bang-bang control. In addition, I develop a formalism for treating phase noise moments of a qubit under quantum bang-bang control. Although the desired pu
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9

Žáčik, Michal. "Šumová spektroskopie pro biologii." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219949.

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This thesis contains glossary topic of spectroscopic measurement methods in broad bands of frequency. There is designed experimental measurement method for simple samples and biological samples measurements for noise spectroscopy in frequency range of 0,1 – 6 GHz, using broadband noise generator. There is realized the workplace and the measurement method is verified by measuring on selected samples. Measurements a displayed and analyzed.
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10

程曦敏 and Hei-man Anita Ching. "Detector noise reduction in positron doppler broadening related spectroscopy systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31225846.

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11

Ching, Hei-man Anita. "Detector noise reduction in positron doppler broadening related spectroscopy systems /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25212114.

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12

Gundín, Martínez Manuel. "Spin Noise Spectroscopy of single spins using single detected photons." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP054.

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Les émetteurs quantiques capables de fonctionner à haute-fidélité et à haut débit sont la pierre angulaire des technologies quantiques photoniques, qui exigent une précision croissante dans la manipulation de qubits uniques. Les émetteurs capables d'héberger un spin sont particulièrement intéressants pour les réseaux de communication quantique et l'informatique quantique, car ils exploitent la ressource clé que constitue l'intrication spin-photon. Dans ce contexte, les boîtes quantiques (BQ) semiconductrices auto-assemblées sont devenues des candidats prometteurs pour les interfaces spin-photo
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13

Dassonneville, Bastien. "Dynamics of Andeev states in a normal metal-superconductor ring : supercurrent fluctuations and spectroscopy of the minigap." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01011558.

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A SNS junction made of two superconducting (S) electrodes separated by a normal (N) metal carries a non-dissipative current whose amplitude depends on the phase difference between the superconductors. The equilibrium properties of this system have been recently explored and are now well understood. The dynamics is still an open question: how does the current-phase relation evolves with a high-frequency phase modulation? What are the mechanisms and characteristic times that govern this evolution?To probe the dynamics of Andreev states, we measured the response of a phase($ \varphi $)-biased NS
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14

Hughes, Colan Evan. "New techniques in NMR spectroscopy." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297524.

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15

Lefeuvre, Odile. "Characterization of stiffening layers by acoustic microscopy and Brillouin spectroscopy." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268173.

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16

Garrity, Patrick Louis. "Nanoscale Thermal Fluctuation Spectroscopy." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/912.

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The utilization of thermal fluctuations or Johnson/Nyquist noise as a spectroscopic method to determine transport properties in conductors or semiconductors is developed in this paper. The autocorrelation function is obtained from power spectral density measurements thus enabling electronic transport property calculation through the Green-Kubo formalism. This experimental approach is distinct from traditional numerical methods such as molecular dynamics simulations, which have been used to extract the autocorrelation function and directly related physics only. This work reports multi-transport
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17

Wiegand, Julia Susan [Verfasser]. "Nonequilibrium spin noise spectroscopy on single quantum dots / Julia Susan Wiegand." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2019. http://d-nb.info/1182532616/34.

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18

Abbas, Chahine. "Optical spectroscopy of indirect excitons and electron spins in semiconductor nanostructures." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS049.

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Ce travail porte sur l’étude optique de la dynamique de spin de deux systèmes: un gaz d’électrons dans des couches minces de CdTe d’une part et des excitons indirects dans un double puits quantique asymétrique en GaAs d’autre part. Des mesures de photoluminescence résolue en temps et en polarisation, et des mesures de spectroscopie pompe-sonde ont permis la détermination des temps de vie et des temps de relaxation de spin des excitons indirects. Le comportement général de la structure a été décrit, les contraintes techniques ont été mise en évidence et les meilleures conditions expérimentales
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19

Glasenapp, Philipp [Verfasser]. "Experimental advances in the optical spectroscopy of carrier spin noise / Philipp Glasenapp." Aachen : Shaker, 2016. http://d-nb.info/112436515X/34.

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20

Collombon, Mathieu. "Résonance noire à trois photons sur un nuage d'ions calcium confinés." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0017.

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Les travaux présentés dans cette thèse décrivent l’ensemble de la démarche expérimentale qui a été mise en place afin d’observer un piégeage cohérent de population à trois photons sur un nuage d’ions calcium confinés en piège radio-fréquence. La réalisation d’un tel processus cohérent repose sur des contraintes expérimentales fortes concernant la relation de phase entre les trois lasers impliqués dans le processus d’interrogation ainsi que sur leurs finesses spectrales. Notre approche est basée sur l’optimisation des performances d’un laser stabilisé à 411 THz (729 nm) pour atteindre une stabi
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21

Brousseau, Jean-Luc. "Spectroscopie par effet tunnel inélastique de la brevetoxine et de l'octadécyltriméthoxysilane /." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 1999. http://www.uqtr.ca/biblio/notice/resume/03-2195693R.html.

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Thèse (Ph.D.) - Université du Québec à Trois-Rivières, 1999.<br>Le résumé et la table des matières sont disponibles en format électronique sur le site Web de la bibliothèque. CaQTU Comprend des références bibliogr.
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22

Turksen, Zeynep. "Applications In Broadband Thz Spectroscopy Towards Material Studies." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612908/index.pdf.

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The purpose of this work was to construct and analyze a THz time domain spectroscopy (THz-TDS) system by using a nanojoule energy per pulse ultrafast laser (non-amplified ultrafast laser or oscillator) source and a non-linear optical generation method for THz generation. First a THz-TDS system, which uses photoconductive antenna (PCA) method for THz generation, was built to understand the working principles of these types of systems. This THz-TDS system which used PCA for generation and a 2mm thick &lt<br>110&gt<br>ZnTe crystal for detection had a bandwidth up to 1 THz with a 1000:1 signal to
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23

Larouche, Pascal. "Évolution temporelle d'une monocouche autoassemblée de dodécanethiol sur support métallique : étude par spectroscopie infrarouge /." Trois-Rivières : Université du Québec à Trois-Rivières, 2003. http://www.uqtr.ca/biblio/notice/resume/18184507R.pdf.

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24

Byrne, Katherine. "The viscoelastic response of single biological molecules to thermal noise by atomic force spectroscopy." Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432315.

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25

HOLM, DAVID ALLEN. "QUANTUM THEORY OF MULTIWAVE MIXING (RESONANCE FLUORESCENCE, SATURATION SPECTROSCOPY, MODULATION, PHASE CONJUGATION, QUANTUM NOISE)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187980.

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This dissertation formulates and applies a theory describing how one or two strong classical waves and one or two weak quantum mechanical waves interact in a two-level medium. The theory unifies many topics in quantum optics, such as resonance fluorescence, saturation spectroscopy, modulation spectroscopy, the build up of laser and optical bistability instabilities, and phase conjugation. The theory is based on a quantum population pulsation approach that resembles the semiclassical theories, but is substantially more detailed. Calculations are performed to include the effects of inhomogeneous
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26

Gom, Bradley Gustav, and University of Lethbridge Faculty of Arts and Science. "A cryogenic detector for submillimetre astronomy." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 1999, 1999. http://hdl.handle.net/10133/102.

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Over the last several years, a submillimetre astronomical polarizing Fourier Transform Spectrometer (FTS) has been developed for use at the James Clerk Maxwell Telescope (JCMT) located atop Mauna Kea, Hawaii. A new liquid3 He cooled dual polarization detector system has been carefully designed for use with this FTS to eliminate noise problems encountered with UKT14, the JCMT facility bolometric detector. The objective of this thesis is to evaluate and optimize the performance of the new detector system. The design of the detector system is discussed, and the noise performance of the system is
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27

Gallant, Judith. "Spectroscopie et propriétés interfaciales du photosystème II en film monomoléculaire à l'interface air-eau /." Thèse, Trois-Rivières, Université du Québec à Trois-Rivières, 1997. http://www.uqtr.ca/biblio/notice/resume/03-2183024R.htm.

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Thèse (Ph.D.) - Université du Québec à Trois-Rivières, 1997.<br>Le résumé et la table des matières sont disponibles en format électronique sur le site Web de la bibliothèque. CaQTU Bibliographie : f. 156-157.
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28

O'Hagan, Seamus. "Multi-mode absorption spectroscopy for multi-species and multi-parameter sensing." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:6f422683-7c50-47dd-8824-56b4b4ea941d.

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The extension of Multi-mode Absorption Spectroscopy (MUMAS) to the infra-red spectral region for multi-species gas sensing is reported. A computationally efficient, theoretical model for analysis of MUMAS spectra is presented that avoids approximations used in previous work and treats arbitrary and time-dependent spectral intensity envelopes, thus facilitating the use of commercially available Interband Cascade Lasers (ICLs) and Quantum Cascade Lasers (QCLs). The first use of an ICL for MUMAS is reported using a multi-mode device operating at 3.7 &mu;m to detect CH<sub>4</sub> transitions over
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29

Boudier, Dimitri. "Etude des phénomènes de transport de porteurs et du bruit basse fréquence en fonction de la température dans les transistors FinFET et GAA NWFET sub-10 nm." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC220/document.

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Les travaux menés pendant cette thèse se concentrent sur l'étude de technologies avancées de MOSFET, plus précisément de FinFET à triple-grille et de nanofils à grille enrobante. Ils ont été fabriqués pour le nœud technologique 10 nm, suivant le même procédé de fabrication à l'exception de la fabrication d'une quatrième grille pour les nanofils. Ces composants sont étudiés en régime statique afin de déterminer les principaux paramètres de leur modèle électrique. Des études à très faible température (&lt; 10 K) et faible tension de drain (&lt; 1 mV) montrent la présence de transport quantique d
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30

Nnolim, Neme O. (Neme Okechukwu). "A comparison of signal-to-noise characteristics : Fourier transform enhanced magnetic rotation spectroscopy and dispersive spectrometry." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38761.

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31

Sun, Yu. "SIGNAL PROCESSING FOR SHORT WAVE INFRARED (SWIR) RAMAN SPECTROSCOPY DIAGNOSIS OF CANCER." Master's thesis, Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/446864.

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Bioengineering<br>M.S.<br>Raman spectroscopy is an effective optical analysis of the biochemically specific characterization of tissues without contrast agents or exogenous dyes. Applications of Raman spectroscopy include analysis and biomarker investigation, disease diagnosis and surgical guidance. One major challenge in Raman spectroscopy is removing inherent fluorescence background present in samples to acquire Raman signatures. In some tissues, like liver, kidney and darkly pigment skin, the auto-fluorescence background is strong enough to overwhelm the Raman peaks in conventional Near-Inf
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Gabbard, Ryan Dwight. "Identifying the Impact of Noise on Anomaly Detection through Functional Near-Infrared Spectroscopy (fNIRS) and Eye-tracking." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1501711461736129.

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33

Lavoie, Hugo. "Propriétés structurales de protéines membranaires à l'interface air-eau : une étude par spectroscopie PM-IRRAS et rayons X /." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 2002. http://www.uqtr.ca/biblio/notice/resume/03-2238826R.html.

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Thèse (Ph.D.) - Université du Québec à Trois-Rivières, 2002.<br>Thèse présentée sous la forme de 3 articles scientifiques rédigés en anglais et acceptés par différentes revues scientifiques. CaQTU Comprend des bibliogr.
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34

Jones, Kolton K. "An Integration Setup if the in-situ Mass and Spectroscopic Analysis for Volatile Liquids or Solids." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/2064.

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To help address the growing need for more and better sensors, an attempt was made to produce an in-situ mass and spectroscopic analysis of liquid and solid samples, to characterize samples and sensors. Spectroscopic analysis consisted of Raman and FTIR where mass measurements were carried out. The sample or sensor’s holder would allow for spectroscopic analysis as well as expose the sample to high temperatures and various chemicals. While Raman and FTIR were successful in producing reliable and consistent data, the constructed watt balance was not. This failure was a result of eliminate vibrat
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Knápek, Alexandr. "Metody přípravy a charakterizace experimentálních autoemisních katod." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233613.

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Téma doktorské práce se zabývá přípravou a popisem katod na bázi autoemise, jenž představují kvalitní a levný elektronový zdroj pro zařízení pracující s fokusovaným elektronovým svazkem. Pro přípravu kompozitní autoemisní katody byla využita elektrochemická metoda výroby. Kompozitní struktura katody zlepšuje proudovou stabilitu ve srovnání s čistě autoemisními katodami na bázi wolframu. Na základě charakterizace katody, jenž byla nově provedena metodou šumové spektroskopie, byla implementována technologická zlepšení stávající výroby. Metoda šumové spektroskopie je založena na analýze emisního
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Sebastian, Ananthu. "Noise dynamics in multi-Stokes Brillouin laser." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S068.

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La diffusion Brillouin stimulée (SBS) est un processus d'interaction cohérent, pour lequel la lumière est diffusée à partir des ondes acoustiques générées optiquement. Les lasers Brillouin suscitent un très grand intérêt pour leur capacité à produire des largeurs de raie ultra cohérentes. Cette thèse est consacrée à la compréhension des propriétés de bruit des lasers à fibre Brillouin en anneau, fonctionnant avec de multiples ordres de Stokes. Tout d'abord, nous présentons une technique basée sur la méthode de ringdown de la cavité, qui permet de caractériser le coefficient de gain Brillouin d
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McGuire, John Andrew. "Femtosecond nonlinear spectroscopy at surfaces Second-harmonic probing of hole burning at the Si(111)7x7 surface and fourier-transform sum-frequency vibrational spectroscopy." Berkeley, Calif. : Oak Ridge, Tenn. : Lawrence Berkeley National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/836810-xRj01W/native/.

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Thesis (Ph.D.); Submitted to the University of California, Berkeley, CA (US); 24 Nov 2004.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "LBNL--56751" McGuire, John Andrew. USDOE Director. Office of Science. Office of Basic Energy Sciences. Materials Science and Engineering Division (US) 11/24/2004. Report is also available in paper and microfiche from NTIS.
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Ahmad, Mahmoud Mohamed Mahmoud [Verfasser]. "Highly Sensitive Sensor Based On Intracavity Laser Absorption Spectroscopy By Means of Relative Intensity Noise / Mahmoud Mohamed Mahmoud Ahmad." Kassel : Universitätsbibliothek Kassel, 2011. http://d-nb.info/1009650874/34.

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Capra, S. "DEVELOPMENT AND CHARACTERIZATION OF AN INNOVATIVE LOW-NOISE HIGH-DYNAMIC-RANGE VLSI CHARGE-SENSITIVE PREAMPLIFIER FOR SOLID-STATE DETECTORS EMPLOYED IN NUCLEAR PHYSICS EXPERIMENTS WITH RADIOACTIVE ION BEAMS." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/359111.

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The latest experimental results of the multichannel front-end ASIC of TRACE are shown. The device submitted to the foundry in the middle of 2014 and received at the end of the same year has been installed on a dedicated PCB and tested using a pulser. We then designed and realized a preamplifier board with eight ASICs for a total of 32 front channels and one back channel. We connected it to a highly-segmented planar silicon detector and acquired the spectrum of a 241Am-244Cm-239Pu triple alpha source obtaining an overall resolution around 3.5‰. The chip comprises four channels specifically des
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40

Landi, Giovanni. "Organic semiconductor material and device characterization by low-frequency noise and admittance spectroscopy of polymer: fullerene solar cells and silicon/organic thin film heterodiodes." Doctoral thesis, Universita degli studi di Salerno, 2015. http://hdl.handle.net/10556/1960.

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2013-2014<br>The main focus of the present work is addressed to the field of organic electronics, which has attracted increasing interest for the development of flexible, large area and low cost electronic applications, from light emitting diodes to thin film transistors and solar cells. The present work describes initially, the application of low-frequency electronic noise spectroscopy for the characterization of organic electronic devices as an innovative and non-destructive technique. In particular the role of the modification induced by thermal stress on the electronic transport pa
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41

Ilhe, Paul. "Estimation statistique des éléments d'un processus shot-noise." Electronic Thesis or Diss., Paris, ENST, 2016. http://www.theses.fr/2016ENST0052.

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Dans le cadre de la spectrométrie gamma, cette thèse introduit de nouveaux estimateurs non paramétriques de l’intensité et de la densité des marques d’un processus shot-noise à partir d’un nombre fini d’observations du processus échantillonné à basse fréquence. Les méthodes proposées utilisent une relation non linéaire reliant la fonction caractéristique de la loi marginale du processus à la densité des marques. Elles sont particulièrement rapides et possèdent l’avantage d’être efficaces mêmes pour des intensités élevées. Les performances de ces méthodes sont étudiées quantitativement et illus
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Sainton, Grégory. "Spectroscopie des supernovæ à grand décalage vers le rouge." Phd thesis, Université Claude Bernard - Lyon I, 2004. http://tel.archives-ouvertes.fr/tel-00106153.

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Cette thèse a permis de comparer les caractéristiques spectrales des supernovæ de type Ia en fonction du<br />décalage vers le rouge ("évolution"). Dans le cadre des collaborations Supernova Cosmology Project (SCP) et SuperNova Legacy Survey (SNLS), dont l'objectif scientique commun est l'étude de l'énergie noire à l'aide de supernovæ de type Ia à grand décalage vers le rouge, une part importante du travail de thèse est consacrée à la réduction des données spectrales,<br />étape nécessaire pour obtenir le spectre physiquement exploitable à partir de données observées. La réduction de l'ensembl
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43

Zhang, Da. "On the Low Frequency Noise in Ion Sensing." Doctoral thesis, Uppsala universitet, Fasta tillståndets elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-320544.

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Ion sensing represents a grand research challenge. It finds a vast variety of applications in, e.g., gas sensing for domestic gases and ion detection in electrolytes for chemical-biological-medical monitoring. Semiconductor genome sequencing exemplifies a revolutionary application of the latter. For such sensing applications, the signal mostly spans in the low frequency regime. Therefore, low-frequency noise (LFN) present in the same frequency domain places a limit on the minimum detectable variation of the sensing signal and constitutes a major research and development objective of ion sensin
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Naji, Majid. "Raman Signal Enhancement and CARS Microscopy." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31538.

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Raman biosensors are appealing for many biomedical applications, due to their accuracy and speed. In addition, Raman microscopy is a non-labeled imaging technique that offers chemical contrast based on Raman vibrational frequencies. However, the weak Raman signal represents a significant obstacle to using Raman in biological applications. The objective of my PhD research, presented in this thesis, is to enhance the Raman signal, thereby enabling it to be used in a wide variety of biomedical applications. More specifically, the research focuses on two different Raman signal enhancement techniq
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Beaudoin, Normand. "Méthode mathématique et numérique de haute précision pour le calcul des transformées de Fourier, intégrales, dérivées et polynômes splines de tout ordre ; Déconvolution par transformée de Fourier et spectroscopie photoacoustique à résolution temporelle /." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 1999. http://www.uqtr.ca/biblio/notice/resume/03-2201231R.html.

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Naude, Natali. "Proton magnetic resonance spectroscopy to evaluate in vivo breast tissue chemistry at 3.0 Tesla." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/225943/1/Natali_Naude_Thesis.pdf.

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The research utilised in vivo 2D magnetic resonance spectroscopy in conjunction with standard breast MRI to investigate MR-visible characteristics associated with breast density and menopausal status. Statistically significant differences were recorded in various neutral lipids and metabolites, and with further development, may enable non-contrast MRI to evaluate breast cancer risk, avoiding the use of gadolinium-based contrast media. The tentative assignment of methylmalonic acid (MMA), which has been associated with cancer proliferation, was also made. Another spectral region was identified
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Zocca, F. "New technologies for low-noise wide-dynamic range preamplification of HPGe segmented detector signals." Doctoral thesis, Università degli Studi di Milano, 2008. http://hdl.handle.net/2434/60937.

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Foltynowicz, Aleksandra. "Fiber-laser-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-22269.

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Noise-immune cavity-enhanced optical heterodyne molecular spectro-metry (NICE-OHMS) is one of the most sensitive laser-based absorption techniques. The high sensitivity of NICE-OHMS is obtained by a unique combination of cavity enhancement (for increased interaction length with a sample) with frequency modulation spectrometry (for reduction of noise). Moreover, sub-Doppler detection is possible due to the presence of high intensity counter-propagating waves inside an external resonator, which provides an excellent spectral selectivity. The high sensitivity and selectivity make NICE-OHMS partic
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Neveu, Pascal. "Propagation de lumière dans l'hélium métastable : stockage, amplification, fluctuations et bruit quantique." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN044/document.

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Un état quantique de lumière est caractérisé par la statistique de son nombre de photons. Lorsque qu'un champ électromagnétique se propage dans un milieu, ses statistiques peuvent être modifiées, notamment en présence de phénomènes cohérents. Cette thèse s'intéresse expérimentalement et théoriquement à la propagation d'états quantiques de lumière dans une vapeur d'hélium métastable à température ambiante. Dans un premier temps, on étudie la propagation de lumière en présence d'oscillations cohérentes de populations ultrafines et montre qu'elles permettent de stocker efficacement une quadrature
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Waldén, Pierre, and Erik Aronson. "Spectroscopic characterization of transiting exoplanets : A study of the possibility to detect atmospheres around exoplanets using SIMPLE." Thesis, Uppsala universitet, Observationell astrofysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-149020.

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This report describes simulations of observations with the near-infrared high-resolution spectrometer SIMPLE that is proposed to the ESO telescope E-ELT. We simulate M4 and G2 stars with transiting Earth-like planets and the goal is to distinguish spectral features originating from the atmosphere of the exoplanet. Noise levels of different magnitudes are added to the simulations and the minimal signal-to-noise required for detection of the atmosphere is estimated. Our conclusion is that detection of atmospheric features looks promising using this setup.
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