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Dissertations / Theses on the topic 'SPAD'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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1

Holma, J. (Jouni). "FPGA controlled SPAD matrix test environment." Master's thesis, University of Oulu, 2013. http://jultika.oulu.fi/Record/nbnfioulu-201312062025.

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Abstract. Test environments for two SPAD matrix ICs are designed and implemented in this work. The matrixes are designed as a receiver of a Raman spectrometer. The aim of the work is a computer driven system that can perform SPAD matrix measurements according to the requirements. The background of the test environments describes the function of the SPAD and the quenching circuit. Besides, the structures and functionalities of the related ICs are presented. The work is about building two separate systems including computer software, a USB data converter on a PCB, an FPGA development board
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2

Talala, T. (Tuomo). "SPAD-rivisensorin ajoitusepäideaalisuuksien kompensointimenetelmiä aikaportitettuun ramanspektroskopiaan." Master's thesis, University of Oulu, 2018. http://jultika.oulu.fi/Record/nbnfioulu-201812113257.

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Tiivistelmä. Työssä selvitettiin aikaportitetussa ramanspektroskopiassa käytettävän CMOS SPAD -rivisensorin ajoitusvirheiden vaikutusta mitattuun ramanspektriin ja kehitettiin menetelmiä ajoitusvirheiden määritykseen sekä spektriin ajoitusvirheistä aiheutuvien vääristymien korjaamiseen. Lisäksi selvitettiin ajoitusvirheiden korjaamisen kannalta aikaerotteiselle sensorille sopiva aikaresoluutio. Ramanspektroskopian suurimpia ongelmia on näytteiden voimakas fluoresenssi, jonka seasta ramansirontaa on vaikea havaita. Mittauksen aikaportitus on tehokas keino fluoresenssin vähentämiseksi. Mittau
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3

Bécue, Bertaut Monique. "Análisis de datos textuales : metodos estadisticos y algoritmos /." Paris ; [Saint-Mandé] (1 Av. Herbillon, 94160) : Cisia, 1991. http://catalogue.bnf.fr/ark:/12148/cb355111281.

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4

Borovička, Adam. "Vícekriteriální hodnocení akciových titulů obchodovaných v systému SPAD na BCPP." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-17326.

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The subject of the diploma paper is multiple criteria analysis of stocks traded on Prague Stock Exchange in terms of System for Support of the Share and Bond Markets. The first part of theoretical passage discusses an introduction of exchange markets with an emphasis on Czech surrounding. The next extensive segment enters on decision making theory. In this chapter we can study basic ideas and connections in multiple criteria decision making. The most comprehensive section is created by theoretical study of methods in multiple criteria decision making. The last partition deals with share's anal
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5

Rumbley, Sarah (Sarah E. ). "Photon-efficient computational imaging with single-photon avalanche diode (SPAD) arrays." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/106005.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.<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 77-78).<br>Single-photon avalanche diodes (SPADs) are highly sensitive photodetectors that enable LIDAR imaging at extremely low photon flux levels. While conventional image formation methods require hundreds or thousands of
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6

Dutton, Neale Arthur William. "CMOS SPAD-based image sensor for single photon counting and time of flight imaging." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/15968.

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The facility to capture the arrival of a single photon, is the fundamental limit to the detection of quantised electromagnetic radiation. An image sensor capable of capturing a picture with this ultimate optical and temporal precision is the pinnacle of photo-sensing. The creation of high spatial resolution, single photon sensitive, and time-resolved image sensors in complementary metal oxide semiconductor (CMOS) technology offers numerous benefits in a wide field of applications. These CMOS devices will be suitable to replace high sensitivity charge-coupled device (CCD) technology (electron-m
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7

Gnecchi, Salvatore. "Analysis and optimisation of high throughput digital silicon photomultipliers." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28841.

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Large area detectors for time correlated single photon counting (TCSPC) are nowadays being implemented in CMOS technology to benefit a large variety of applications including positron emission tomography (PET) and 3D laser ranging (LiDAR), exploiting the advanced timing and counting capabilities inside single chips. Single photon avalanche diodes (SPADs) and silicon photomultipliers (SiPMs) represent a great option to realise such detectors thanks to their exceptional timing resolution and the ability to be arranged into arrays. Recently, digital SiPMs (dSiPMs) have been introduced to improve
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8

Barnett, J. C. "A study of the SPAD and control measures to limit its occurrence." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426954.

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9

Webster, Eric Alexander Garner. "Single-Photon Avalanche Diode theory, simulation, and high performance CMOS integration." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/17987.

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This thesis explores Single-Photon Avalanche Diodes (SPADs), which are solid-state devices for photon timing and counting, and concentrates on SPADs integrated in nano-scale CMOS. The thesis focuses on: the search for new theory regarding Geiger-mode operation; proving the utility of calibrated Technology Computer- Aided Design (TCAD) tools for accurately simulating SPADs for the first time; the investigation of how manufacture influences device operation; and the integration of high performance SPADs into CMOS which rival discrete devices. The accepted theories of SPAD operation are revisited
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10

Gilbert, Michael Stephen. "A Small-Perturbation Automatic-Differentiation (SPAD) Method for Evaluating Uncertainty in Computational Electromagnetics." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354742230.

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11

Panina, Ekaterina. "Design and characterisation of SPAD based CMOS analog pixels for photon-counting applications." Doctoral thesis, Università degli studi di Trento, 2014. https://hdl.handle.net/11572/368962.

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Recent advancements in biomedical research and imaging applications have ignited an intense interest in single-photon detection. Along with single-photon resolution, nanosecond or sub-nanosecond timing resolution and high sensitivity of the device must be achieved at the same time. Single- Photon Avalanche Diodes (SPADs) have proved their prospectives in terms of shot-noise limited operation, excellent timing resolution and wide spec- tral range. Nonetheless, the performance of recently presented SPAD based arrays has an issue of low detection efficiency by reason of the area on the substrate
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12

Panina, Ekaterina. "Design and characterisation of SPAD based CMOS analog pixels for photon-counting applications." Doctoral thesis, University of Trento, 2014. http://eprints-phd.biblio.unitn.it/1155/1/PhD-Thesis.pdf.

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Recent advancements in biomedical research and imaging applications have ignited an intense interest in single-photon detection. Along with single-photon resolution, nanosecond or sub-nanosecond timing resolution and high sensitivity of the device must be achieved at the same time. Single- Photon Avalanche Diodes (SPADs) have proved their prospectives in terms of shot-noise limited operation, excellent timing resolution and wide spec- tral range. Nonetheless, the performance of recently presented SPAD based arrays has an issue of low detection efficiency by reason of the area on the substrate
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13

Parmesan, Luca. "Photon efficient, high resolution, time resolved SPAD image sensors for fluorescence lifetime imaging microscopy." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33171.

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FLIM is branch of microscopy mainly used in biology which is quickly improving thanks to a rapid enhancement of instrumentation and techniques enabled by new sensors. In FLIM, the most precise method of measuring fluorescent decays is called TCSPC. High voltage PMT detection devices together with costly and bulky optical setups which scan the sample are usually required in TCSPC instrumentation. SPADs have enabled a big improvement in TCSPC measurement setup, providing a CMOS compatible device which can be designed in wide arrays format. However, sensors providing in-pixel TCSPC do not scale i
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14

Zhou, Xinxin. "An InGaAlAs-InGaAs two-colour detector, InAs photodiode and Si SPAD for radiation thermometry." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/7462/.

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This work aims to develop infrared detectors and to introduce a new measurement technique for infrared radiation thermometry. It consists of two-colour detectors for ratio thermometry, InAs photodiode for 3.43 m narrow band thermometer and photon counting thermometer using a Si single photon avalanche photodiode (SPAD). In addition to research in these detectors, a Monte Carlo model for modelling impact ionisation in Si was also developed. InGaAlAs is attractive material for multi-colour detection at wavelengths up to 1.7 m, as it is lattice matched to InP substrate. InGaAlAs-InGaAs two-colo
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15

Beer, Maik [Verfasser], and Rainer [Akademischer Betreuer] Kokozinski. "SPAD-basierte Sensoren für die laufzeitbasierte Distanzmessung bei hoher Hintergrundlichtintensität / Maik Beer ; Betreuer: Rainer Kokozinski." Duisburg, 2018. http://d-nb.info/1173615938/34.

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16

TORTAROLO, GIORGIO. "Laser Scanning Microscopy with SPAD Array Detector: Towards a New Class of Fluorescence Microscopy Techniques." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1000654.

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Laser scanning microscopy is one of the most common architectures in fluorescence microscopy. In a nutshell: the objective lens focuses the laser beam(s) and generates an effective excitation spot which is scanned on the sample; for each pixel, the fluorescent image is projected into a single-element detector, which – typically – spatially and temporally integrates the fluorescent light along its sensitive area and the pixel dwell-time, thus providing a single-intensity value per pixel. Notably, the integration performed by the single-element detector hinders any additional information potenti
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17

Nawrot, Gesa-Henrike [Verfasser]. "Single-Pass Albumin Dialyse (SPAD) zur Therapie des akuten Leberversagens : In-vitro Dosisfindungsstudie / Gesa-Henrike Nawrot." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2015. http://d-nb.info/1068208554/34.

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18

Drame, Marieme. "Pearl Millet Nutritional Quality and Fertilization of Sweet Corn in Senegal." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/81259.

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Agricultural production is the main source of income and major employer in many countries in Africa, including Senegal. Commercial sweet corn (Zea mays L. ssp. saccharata) production in Senegal is increasing in response to global marketing opportunities and offers producers the ability to increase income and diversify the cropping base. Production of optimum sweet corn yield and quality depends on adequate nutrient supply, particularly, nitrogen (N). Current N recommendations are based on recommendations specific to corn for grain. This study aimed to identify tools to estimate sweet corn N st
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19

Brunelli, Marcela Cristina [UNESP]. "Índice SPAD e trocas gasosas ao longo do dia para diferenciação de cana-de-açúcar sob deficiência hídrica." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/113789.

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Made available in DSpace on 2015-01-26T13:21:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-07-25Bitstream added on 2015-01-26T13:30:59Z : No. of bitstreams: 1 000806690.pdf: 976423 bytes, checksum: c448d015e9aaa5664ccd7f55526021db (MD5)<br>A cana-de-açúcar (Saccharum spp.) é uma cultura globalmente importante não só para a produção de açúcar como também para a produção de bioenergia. A seca é um dos fatores ambientais mais importantes que limita a produção mundial de cana-de-açúcar. Devido à natureza irregular das chuvas, os produtores têm certa dependência da irrigação para mant
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20

Brunelli, Marcela Cristina 1982. "Índice SPAD e trocas gasosas ao longo do dia para diferenciação de cana-de-açúcar sob deficiência hídrica /." Botucatu, 2014. http://hdl.handle.net/11449/113789.

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Orientador: Marcelo de Almeida Silva<br>Banca: Elizabeth Orika Ono<br>Banca: Claudia Moura dos Santos<br>Resumo: A cana-de-açúcar (Saccharum spp.) é uma cultura globalmente importante não só para a produção de açúcar como também para a produção de bioenergia. A seca é um dos fatores ambientais mais importantes que limita a produção mundial de cana-de-açúcar. Devido à natureza irregular das chuvas, os produtores têm certa dependência da irrigação para manter as metas de produção. Entretanto, a água para irrigação é limitada, e deve ser utilizada racionalmente, não só para reduzir o desperdício,
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21

Garcia, Catarina Isabel Rola. "Efeito da aplicação de diferentes doses de um extrato de algas em oliveiras Arbequina e Cobrançosa." Master's thesis, ISA/UL, 2015. http://hdl.handle.net/10400.5/10916.

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Mestrado em Engenharia Agronómica - Hortofruticultura e Viticultura - Instituto Superior de Agronomia<br>The present work aimed to study the effect of the application of biostimulant Goёmar Olivos, from Selectis, in the efficiency of use of nitrogen forms (nitrate and ammonium) in the olive cultivars Arbequina and Cobrançosa. This assessment was made indirectly by determination of enzymatic activities of nitrate reductase (NR) and glutamine synthetase (GS) in leaves and reproductive organs of the olive trees and the quantitation of chlorophyll content in the leaves (related to the nitrogen con
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22

Parent, Samuel. "Conception, caractérisation et optimisation de SPAD en technologie Dalsa HV CMOS 0.8 μm pour intégration dans un 3D-SiPM". Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8850.

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Résumé : Les photodiodes à avalanche monophotonique (SPAD) sont d'intérêts pour les applications requérant la détection de photons uniques avec une grande résolution temporelle, comme en physique des hautes énergies et en imagerie médicale. En fait, les matrices de SPAD, souvent appelés photomultiplicateurs sur silicium (SiPM), remplacent graduellement les tubes photomultiplicateurs (PMT) et les photodiodes à avalanche (APD). De plus, il y a une tendance à utiliser les matrices de SPAD en technologie CMOS afin d'obtenir des pixels intelligents optimisés pour la résolution temporelle. La fabric
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23

Jouni, Ali. "Space radiation effects on CMOS single photon avalanche diodes (SPADs)." Electronic Thesis or Diss., Toulouse, ISAE, 2024. http://www.theses.fr/2024ESAE0012.

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Le sujet de cette thèse traite des effets des radiations spatiales sur des détecteurs CMOS à avalanches, et particulièrement sur les dispositifs SPADs (pour Single Photon Avalanche Diode en anglais, ou photodiode à avalanche à photon unique). Ces photodiodes présentent un gain interne presque infini et sont donc sensibles à des très faibles conditions de lumières. Ainsi, avec en plus une excellente résolution temporelle, ces capteurs peuvent être très intéressant pour des applications spatiales nécessitant des mesures de temps de vols, comme la topographie d’objets célestes ou les Rendez-vous
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24

Jiménez, Cuevas Hector Daniel, and Granados Francisco Javier Garduño. "DETERMINACIÓN DE LA CURVA DE DILUCIÓN DE NITRÓGENO EN LA PRODUCCIÓN DE MATERIA SECA DE AVENA FORRAJERA (Avena sativa L.)." Tesis de Licenciatura, UNIVERSIDAD AUTONOMA DEL ESTADO DE MEXICO, 2021. http://hdl.handle.net/20.500.11799/109918.

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Tesis de Licenciatura de Ingeniero Agrónomo Fitotecnista en donde se evaluó el efecto del nitrógeno sobre la producción de materia seca en tres variedades de avena para valles altos de México.<br>El objetivo del presente trabajo fue determinar la curva de dilución de nitrógeno en avena forrajera para valles altos. Durante el ciclo invierno-primavera de 2019 se evaluaron en el valle de Toluca, tres variedades de avena (Avemex, Karma y Obsidiana) bajo cuatro dosis de N (0, 60, 120 y 240 Kg N ha-1) en un experimento bifactorial bajo un diseño de bloques completos al azar con tres repeticiones en
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25

Gomara, González Nicolás Alejandro. "Asociación del rendimiento y contenido de proteína con mediciones spad en los estados de primer nudo y embuche en trigo candeal." Tesis, Universidad de Chile, 2012. http://www.repositorio.uchile.cl/handle/2250/112222.

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Memoria para optar al título profesional de Ingeniero Agrónomo<br>Las estrategias de manejo del nitrógeno pueden tener un impacto importante en el rendimiento y proteína en grano, como también sobre el medio ambiente, estrategias que pueden ser definidas mediante el uso del SPAD. Este estudio asoció el rendimiento y el contenido de proteína en grano con mediciones SPAD y color de hoja en estado de primer nudo y embuche en trigo candeal. El trabajo se realizó en la Estación Experimental Antumapu de la Facultad de Ciencias Agronómicas de la Universidad de Chile, durante la temporada 2010/2
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26

Figueroa, Bustos Victoria. "Evaluación del índice de suficiencia de nitrógeno como mejorador de la capacidad predictiva de las lecturas SPAD en híbridos de maíz." Tesis, Universidad de Chile, 2013. http://repositorio.uchile.cl/handle/2250/151705.

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Tesis para optar al Título Profesional de Ingeniero Agrónomo y al Grado de Magister en Ciencias Agropecuarias Mención Producción de Cultivos<br>El maíz (Zea mays L.) es el cereal con mayor producción a nivel mundial con 817 millones de toneladas en el año 2009 (FAO, 2012). Los usos del maíz de grano están orientados fundamentalmente a consumo animal, de aves y porcinos, y en segundo término a consumo humano e industrial. La principal forma de consumo para alimentación humana es la harina de maíz (Mejía, 2003). En Chile, la superficie anual de siembra en las tres últimas temporadas (2009-2012)
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27

Devita, Marie. "Mesure et dangerosité des métaux nobles pour les photodétecteurs à avalanche à photon unique." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAD029/document.

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Les métaux nobles (Au, Ag, Pt, Ir, Pd et Ru) sont utilisés en salle blanche pour la réalisation de dispositifs électroniques ou peuvent être apportés par les équipements de fabrication (composants d’alliage par exemple). Il a été montré qu’ils pouvaient impacter fortement les dispositifs. Il est alors nécessaire de procéder au contrôle des équipements pour diagnostiquer au plus tôt une contamination. Or, il n’existe pas de technique industrielle pour leur suivi et ce à des niveaux d’au moins 5.109 at.cm-2 - recommandation ITRS. Il se pose la question de la pertinence de ces recommandations en
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Larrosa, Ramón Felipe Méndez. "Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/3168.

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The release of new cultivars and improvement in management practices is necessary to examine the time and nitrogen (N) rates to be applied to obtain high yields. Also there is little information about the effect of the N rate and stage (vegetative or reproductive) on the sensitivity of plants of rice to cold in the reproductive stage. For these reasons four experiments were installed two in field and two in a greenhouse with the objective of determining the effect of N rates and application timing on yield and on the susceptibility of rice plants to low temperature in the reproductive stage. T
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29

Kloster-Landsberg, Meike. "Spectroscopie à corrélation de fluorescence multi-confocale : développement et application à l'étude de la réponse cellulaire au choc thermique." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENY053/document.

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Le noyau d'une cellule est hétérogène par sa structure et son activité et beaucoup de ses composants interagissent de façon dynamique. Lors de l'étude de processus cellulaires comme la réponse au stress thermique, des expériences classiques de spectroscopie de corrélation de fluorescence (FCS), qui sont habituellement limitées à un seul volume d'observation, n'apportent que des résultats partiels à cause des informations spatiales manquantes. Ce mémoire de thèse présente une nouvelle technique de FCS multi-confocale (mFCS) qui permet des mesures FCS simultanées à différents endroits d'une cell
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30

Khaireddine, Nasr. "Utilisation de l'indicateur chlorophyllien au SPAD pour un diagnostic de précision de l'état d'équilibre nutritif d'un champ de pommes de terre au Québec." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26862.

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La pomme de terre est l’une des cultures les plus exigeantes en engrais et elle se cultive généralement sur des sols légers ayant de faibles réserves en N, P, K, Ca et Mg. Ces cinq éléments sont essentiels à la croissance des plants, à l’atteinte des bons rendements et à l’obtention de bonne qualité des tubercules de pomme de terre à la récolte et à l’entreposage. La recherche d’un équilibre entre ces cinq éléments constitue l’un des défis de pratiques agricoles de précision. La collecte de 168 échantillons de feuilles de pommes de terre selon une grille de 40 m × 60 m (densité d’échantillonna
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Rabêlo, Flávio Henrique Silveira. "Enxofre na atenuação dos efeitos tóxicos do cádmio no capim-tanzânia." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-21032014-150404/.

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Plantas cultivadas em ambientes com média e alta disponibilidade de cádmio apresentam menor produção de folhas e perfilhos devido à maior quantidade de cádmio absorvido, resultando em menor produção de biomassa. O fornecimento de enxofre às plantas pode minimizar os efeitos negativos causados pelo cádmio, uma vez que esse nutriente participa de compostos que atuam no sistema antioxidante, conferindo maior tolerância aos metais pesados. Objetivou-se avaliar as modificações ocorridas: i) nos aspectos morfológicos, morfogênicos e produtivos; ii) no estado nutricional e iii) na resposta do sistema
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32

Richardson, Justin Andrew. "Time resolved single photon imaging in nanometer scale CMOS technology." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/7588.

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Time resolved imaging is concerned with the measurement of photon arrival time. It has a wealth of emerging applications including biomedical uses such as fluorescence lifetime microscopy and positron emission tomography, as well as laser ranging and imaging in three dimensions. The impact of time resolved imaging on human life is significant: it can be used to identify cancerous cells in-vivo, how well new drugs may perform, or to guide a robot around a factory or hospital. Two essential building blocks of a time resolved imaging system are a photon detector capable of sensing single photons,
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33

Boucho, Ana Cristina Martins. "Contributo do fósforo para a deficiência simbiótica de leguminosas pratenses." Master's thesis, ISA-UL, 2016. http://hdl.handle.net/10400.5/13365.

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Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia - UL<br>O fósforo (P) é um nutriente essencial ao crescimento das espécies pratenses e forrageiras sendo também necessário à bactéria rizobiana para obtenção de energia para a captura do N2 durante o processo simbiótico. Para avaliar o efeito do fertilizante fosfatado nas leguminosas de pastagens melhoradas realizou-se um ensaio em vasos (64) com blocos completamente casualizados e quatro repetições, com um tratamento fatorial com quatro níveis de P (P0 = 0, P1 = 30, P2 = 60 e P3 = 90 kg P ha-1) e três espécies pratenses (Loli
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34

Fisher, Edward Michael Dennis. "Parallel reconfigurable single photon avalanche diode array for optical communications." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/11690.

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There is a pressing need to develop alternative communications links due to a number of physical phenomena, limiting the bandwidth and energy efficiency of wire-based systems or economic factors such as cost, material-supply reliability and environmental costs. Networks have moved to optical connections to reduce costs, energy use and to supply high data rates. A primary concern is that current optical-detection devices require high optical power to achieve fast data rates with high signal quality. The energy required therefore, quickly becomes a problem. In this thesis, advances in single-pho
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Verroi, Enrico. "Very fast photon counting photometers for astronomical applications." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3421592.

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The topics treated in this thesis are the design, the integration and the use of the ultra-fast single photon photometer IQuEYE (Italian Quantum Eye). The implementation of this instrument represents an important step in a project, initiated in 2005, for the realization of a Quantum Photometer (QuantEYE) for the telescope EELT (European Extremely Large Telescope) of 42 meters in diameter, now under construction, which is scheduled for completion in 2018. Such an instrument would represent a breakthrough in observational Astronomy and it would allow extending the knowledge gained from theoret
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Corbeil, Therrien Audrey. "Conception et modélisation de détecteurs de radiation basés sur des matrices de photodiodes à avalanche monophotoniques pour la tomographie d'émission par positrons." Thèse, Université de Sherbrooke, 2018. http://hdl.handle.net/11143/11909.

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La tomographie d'émission par positrons (TEP) se distingue des autres modalités d'imagerie par sa capacité à localiser et quantifier la présence de molécules marquées, appelées radiotraceurs, au sein d'un organisme. Cette capacité à mesurer l'activité biologique des différents tissus d'un sujet apporte des informations uniques et essentielles à l'étude de tumeurs cancéreuses, au fonctionnement du cerveau et de ses maladies neurodégénératives et de la pharmacodynamique de nouveaux médicaments. Depuis les tout débuts de la TEP, les scientifiques rêvent de pouvoir utiliser l'information de te
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Fernandes, Fabiana Morbi [UNESP]. "Estimativa da necessidade de nitrogênio na cultura da batata com base no índice relativo de clorofila." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151369.

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Submitted by Fabiana Morbi Fernandes null (fabianamorbi90@gmail.com) on 2017-08-18T11:48:51Z No. of bitstreams: 1 Tese Fabiana-versao Final 2.pdf: 1313330 bytes, checksum: ead7f093a270db6026255c4abdbfe37c (MD5)<br>Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-08-23T18:18:29Z (GMT) No. of bitstreams: 1 fernandes_fm_me_bot.pdf: 1313330 bytes, checksum: ead7f093a270db6026255c4abdbfe37c (MD5)<br>Made available in DSpace on 2017-08-23T18:18:30Z (GMT). No. of bitstreams: 1 fernandes_fm_me_bot.pdf: 1313330 bytes, checksum: ead7f093a270db6026255c4abdbfe37c (MD5)
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Rhéaume, Vincent-Philippe. "Circuits d'instrumentation intégrés pour caractérisation de diodes monophotoniques à avalanche en technologie CMOS haute tension 0,8 μm". Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8141.

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Les travaux présentés dans ce mémoire s'inscrivent dans le contexte du Groupe de Recherche en Appareillage Médical de Sherbrooke (le GRAMS), qui cherche à développer des capteurs de photons plus sensibles et plus performants, destinés à être utilisés pour détecter des photons provenant de cristaux scintillateurs notamment utilisés en tomographie d'émission par positrons. L'objectif principal du travail accompli est de faciliter la caractérisation de diodes monophotoniques à avalanche (single-photon avalanche diodes, SPAD) développées sur une technologie CMOS. Cette caractérisation couvre c
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Silva, Filho Jaime Barros da. "Índices de nitrogênio na planta e produtividade de tubérculos de batata-semente em sistema hidropônico de três fases." Universidade Federal de Viçosa, 2011. http://locus.ufv.br/handle/123456789/4561.

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Made available in DSpace on 2015-03-26T13:39:46Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1735506 bytes, checksum: 2f6410b3563d373c1c4860171aea2fee (MD5) Previous issue date: 2011-07-27<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The aim of this thesis was to characterize, in a three phases hydroponic system using sprout as a propagation material, the effect of nitrogen (N) on the fourth leaf from the apex (MS4F) N content and indicate the possible indexes to be used in the N diagnosis and to prognosis the potato tuber basic seed yield. Additionally, the obje
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Bohn, Alberto. "Adubação nitrogenada na produção de biomassa e sementes de azevém em rotação com soja." Universidade Federal de Pelotas, 2014. http://repositorio.ufpel.edu.br/handle/ri/1431.

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Made available in DSpace on 2014-08-20T13:44:36Z (GMT). No. of bitstreams: 1 dissertacao_alberto_bohn.pdf: 586241 bytes, checksum: 0568eec20a5d22d087fb11ebc9a8fb75 (MD5) Previous issue date: 2014-03-17<br>The experiment was conducted at the Experimental Station of Embrapa Clima Temperado/Lowlands and Seed Analysis Laboratory of the Department of Plant Science, UFPel. Different densities in the soil seeds (T1 - 777.70 kg.ha-1; T2 - 736.63 kg.ha-1; T3 - 624.59 kg.ha-1 and T4 - 234.42 kg.ha-1) were tested in annual ryegrass (Lolium multiflorum Lam.) in succession to soybean crop. Forage harve
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41

Pagno, Federico. "Implementazione di un modello di pressione di radiazione solare attraverso un algoritmo di ray-tracing." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23000/.

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Analisi dell'accelerazione dovuta al disturbo SRP (Solar Radiation Pressure) nella propagazione di una traiettoria con un software di integrazione numerica (GMAT). Modellazione matematica della forza attraverso l'analogia della lastra piana. Presentazione dei modelli operativi utilizzati in un software di integrazione numerica per tenere conto di tale disturbo: modello sferico, modello SPAD, modello a pannelli elementari, modello cubico, etc. Implementazione di funzioni MATLAB per implementare il modello SPAD, sia con la semplificazione del modello sferico o cubico, che nel caso in cui si d
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42

Gromaz, Roig Andrea. "Escarola (Cichorium endivia L.): sistemas de manejo y ciclos como factores de la incidencia de fisiopatías y la acumulación de nitratos." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/78295.

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Abstract Endive (Cichorium endivia L.) is a leafy vegetable mainly used in ready-to use salads. Nitrate accumulation, is a serious problem in this type of vegetables, because when ingested, nitrate has toxic effects in the human health. Solar radiation, nitrogen fertilization and temperature are some factors that affect nitrate concentration in leaves. 'Tipburn' , bolting and 'glassines' are some physiological disorders that appears in endives and impairs their marketable quality. 'Tipburn' is characterized by necrosis on the outside of leaves, and 'glassines' is associated with oil spots on
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43

Rae, Bruce R. "Micro-systems for time-resolved fluorescence analysis using CMOS single-photon avalanche diodes and micro-LEDs." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/4219.

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Fluorescence based analysis is a fundamental research technique used in the life sciences. However, conventional fluorescence intensity measurements are prone to misinterpretation due to illumination and fluorophore concentration non-uniformities. Thus, there is a growing interest in time-resolved fluorescence detection, whereby the characteristic fluorescence decay time-constant (or lifetime) in response to an impulse excitation source is measured. The sensitivity of a sample’s lifetime properties to the micro-environment provides an extremely powerful analysis tool. However, current fluoresc
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44

Haltufová, Veronika. "Porovnání vybraných metod predikce na kapitálových trzích." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2012. http://www.nusl.cz/ntk/nusl-223692.

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The purpose of this master’s thesis is comparison of selected methods for prediction of the capital markets. It is about technical analysis methods, used to predict trend of share prices of the capital market and finding entry signals to buy stock and exit sinals to sell stock. Methods are analyzed for selected stock from SPAD, which is part of Prague Stock Exchange.
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45

Matsuzaki, Ricardo Toshiharu. "Quelatos de ferro afetam o crescimento e a produção de rúcula cultivada em sistema hidropônico." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-30102013-170714/.

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Foram conduzidos dois experimentos com o objetivo de avaliar a eficiência do uso de quelatos de ferro no cultivo hidropônico de rúcula em ambiente protegido. O delineamento experimental utilizado foi o inteiramente casualizado com 4 repetições e 6 tratamentos: Fe-IDHA (ácido D,L aspártico, N-(1,2 dicarboxietil) tetra sódico), Fe-EDTA (ácido etilenodiamino tetra acetic), Fe-ORGÂNICO (a base de aminoácidos), Fe-EDDHA (ácido etilenodiamino - di (o - hidroxifenil-acético o-o 4,8%) e Fe-HBED (ácido N, n`-Bis (2-Hidroxibenzil) N- etilenodiamina n`dipropiônico) e testemunha (sem adição de ferro). O p
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46

ADAMO, Gabriele. "THE SILICON PHOTOMULTIPLIER:AN IN-DEPTH ANALYSIS IN THE CONTINUOUS WAVE REGIME." Doctoral thesis, Università degli Studi di Palermo, 2014. http://hdl.handle.net/10447/90861.

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The Silicon Photomultiplier (SiPM) is a novel solid state photon counting detector consisting of a parallel array of avalanche photodiodes biased beyond their breakdown voltage. It has known a fast development in the last few years as a possible alternative to vacuum photomultiplier tubes (PMTs) and conventional avalanche photodiodes (APDs). Indeed, current research in photodetectors is directed toward an increasing miniaturization of the pixel size, thus both improving the spatial resolution and reducing the device dimensions. SiPMs show high photon detection efficiency in the visible and nea
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47

Cardoso, Arnon Afonso de Souza. "Suprimento de enxofre e o alívio do estresse causado pelo bário em capim tanzânia." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-07112016-113533/.

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Elevada disponibilidade de bário (Ba) no meio de cultivo pode resultar em severa toxidez nas plantas. A toxidez causada pelo metal pesado nas plantas pode ser amenizada pelo fornecimento de nutrientes, particularmente o enxofre (S). Objetivou-se avaliar os parâmetros produtivos, sintomas visuais, estado nutricional, índice SPAD, indicadores de estresse (malondialdeído, peróxido de hidrogênio e prolina) e a atividade de enzimas do sistema antioxidante (glutationa redutase, superóxido dismutase, catalase, ascorbato peroxidase e guaiacol peroxidase) do capim tanzânia (Panicum maximum Jacq. cv. Ta
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48

Chaves, De Albuquerque Tulio. "Integration of Single Photon Avalanche Diodes in Fully Depleted Silicon-on-Insulator Technology." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI091.

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Ce travail a pour objectif la conception, la simulation, la modélisation et la caractérisation électrique de diodes à avalanche à photon unique (Single Photon Avalanche Diodes - SPAD) intégrées dans une technologie CMOS Fully Depleted Silicon on Insulator - FDSOI. Les SPAD sont des diodes (jonctions PN) polarisées en inverse au-delà de la tension de claquage, fonctionnant dans le mode Geiger. Grace à leur haute sensibilité et rapidité, les SPAD sont utiles pour plusieurs applications, telles que les mesures de temps de vol (Time of Flight - ToF), l’imagerie médicale (Fluorescence Lifetime Imag
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49

Megda, Marcio Mahmoud. "Suprimento de nitrogênio e de potássio e características morfogênicas, nutricionais e produtivas do capim-Marandu." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-23062009-141907/.

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O nitrogênio e o potássio são essenciais para o desenvolvimento das plantas, são os nutrientes extraídos em altas quantidades e sua disponibilidade pode alterar as características produtivas e nutricionais das plantas. Assim, objetivou-se estudar: a) as características morfogênicas e a produção de massa seca da parte aérea e das raízes da Brachiaria brizantha cv. Marandu e b) a concentração de nitrogênio, potássio, nitrato e amônio nas lâminas de folhas recém-expandidas e nas raízes, bem como o valor SPAD, a atividade da enzima redutase do nitrato, a distribuição percentual do nitrato e amônio
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50

Schenk, Tobias [Verfasser]. "Investigation of light-induced SPA2 degradation and COP1-SPA inactivation in Arabidopsis thaliana / Tobias Schenk." München : Verlag Dr. Hut, 2019. http://d-nb.info/1196414637/34.

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