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Dissertations / Theses on the topic 'Layered Sample'

Author: Grafiati

Published: 9 March 2023

Last updated: 10 March 2023

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1

ORSILLI, JACOPO. "AR-XRF Techniques for the Analysis of Cultural Heritage layered samples." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2023. https://hdl.handle.net/10281/403656.

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L’analisi scientifica è da un po’ di tempo entrata nel mondo dei beni culturali, non sono più solo gli archeologi e gli storici dell’arte a occuparsi dello studio dei reperti archeologici e storici, ma anche gli scienziati sono entrati a gamba tesa portando le loro conoscenze al servizio di questa vasta gamma di materiali. Lo studio di reperti botanici e zoologici, le competenze chimiche e mineralogiche, lo studio di fenomeni fisici, ha permesso di porre e rispondere a nuove domande, colmando così lacune sulla storia dell’umanità. Reti commerciali, migrazioni, tecniche produttive, molte sono s

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2

Bilici, Cagdas. "Development of a Sediment Sampling Free Fall Penetrometer Add-on Unit for Geotechnical Characterization of Seabed Surface Layers." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/96146.

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In-situ geotechnical testing of surficial sediment layers in areas of active sediment dynamics can provide essential information about physical and geotechnical variations of sediment properties with regards to active sediment remobilization processes. For example, portable free fall penetrometers (PFFPs) can assist with the detection of mobile sediment layers. They are easy to deploy, and can provide a large spatial coverage in a time- and cost-effective manner. However, they often struggle to provide more detailed information about the properties of mobile sediment layers due to a lack of ca

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3

Želvys, Dainius. "Ventiliuojamo oro pasiskirstymas bulvių sampile." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110602_120644-65726.

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Laikant bulves storame 5 – 6 m storio sluoksnyje, aruode sunku likviduoti susidariusius gedimo židinius. Židinio pašalinimui būtina suintensyvinti ventiliavimą, kad mumifikuoti gedimo židinyje esančius sugedusius gumbus. Tyrimų tikslas - ištirti ventiliuojamo oro paskirstymo dėsningumus bulvių sandėlio sampile ir eksperimentiniame oro paskirstymo stende. Nustatyti oro paskirstymą ventiliuojamame sampile, keičiant skirstomųjų ortakių skaičių, bei ištirti ventiliavimo suintensyvinimo galimybes susidarančias gedimo zonoje. Nustatyta, kad sumažinus atidarytų skirstomųjų ortakių skaičių, galima pad

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4

Pandozzi, Fabiano. "Spectroscopic analysis of fractal scattering and hidden layers in complex scattering samples." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106384.

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Near-infrared optical spectroscopic measurement of samples is an important analytical tool for the determination of properties such as particle size, chromophore composition, and concentration. This information is invaluable for sample assessment in pharmaceutical, agricultural, and environmental areas. However, samples often exhibit significant light scattering, which complicates measurements. This thesis investigates chemometric approaches including power law and component analysis methods to extract useful sample information from data, while simplified instrumentation is developed to facili

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5

Minault, Christophe S. "Filtered vacuum arc deposition of diamond like carbon films on sharp edged samples." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298488.

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6

Lee, Kang Kug. "A Sample-to-Answer Polymer Lab-on-a-Chip with Superhydrophilic Surfaces using a Spray Layer-by-Layer Nano-Assembly Method." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1384864905.

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7

Sears, S. Kelly (Stephen Kelly). "Effects of sample treatment on mixed-layer illite-smectite in X-ray diffractograms and transmission electron micrographs." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69658.

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Combined X-ray powder diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) were used to identify and characterize the clay mineral assemblages in 0.05-0.1 $ mu$m and ${<0.05} mu$m size fractions separated from shales of three depths (4800, 8700-8750, and 12500-12550 ft) from the Reindeer D-27 well in the Beaufort-Mackenzie area, Arctic Canada. Ethylene-glycol solvated samples indicated a two-component mixed-layer I/S system, whereas glycerol solvation suggested an additional high-charge expandable component. Exchange with octylammonium (n$ rm sb c$ = 8) and octadecyla

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8

Eluru, Hima Bindu. "Deposition and Patterning of Paraffin Layers for Culture-Based Detection of Mycobacteria in Environmental Samples." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1093032206.

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9

Sirdar, Mohamed Mahmoud. "Antibiotic residues in commercial layer hens in Khartoum State, Sudan, 2007-2008." Diss., University of Pretoria, 2010. http://hdl.handle.net/2263/23460.

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The prevalence of antimicrobial residues in table eggs produced in Khartoum State, Sudan was estimated and determined. All available producing layer farms in the state were sampled in April, June and August 2008. For each layer house three egg samples were randomly collected to increase the sensitivity of antimicrobial residue screening test detectability. In total, 933 egg samples were analyzed, collected from 175 layer farms (335 layer houses) in three periods of collection. An in-house residue detection test using Geobacillus stearothermophillus var calidolactis was the analytical procedure

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10

Hyndman, Rhonda Jane. "Transport studies in p-type double quantum well samples." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325711.

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11

Nath, Subhra K. "Spectral estimates and flow characteristics from non-uniformly sampled LDV data in a turbulent junction vortex." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54395.

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The strongly time variant flow in an incompressible, turbulent junction vortex formed at the base of a streamlined cylinder with a circular leading edge placed normal to a flat surface was investigated. The investigation centered around spectral analysis and time resolved measurements of the velocity fluctuations to characterize the time variant flow on the plane of symmetry. All the measurements were performed with a two-color, two-component, frequency shifted laser Doppler velocimeter. Spectral analysis methods for randomly sampled data occurring from the LDV were evaluated under various s

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12

Hörmann, Wolfgang, and Josef Leydold. "Improved Perfect Slice Sampling." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 2003. http://epub.wu.ac.at/868/1/document.pdf.

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Perfect slice sampling is a method to turn Markov Chain Monte Carlo (MCMC) samplers into exact generators for independent random variates. The originally proposed method is rather slow and thus several improvements have been suggested. However, two of them are erroneous. In this article we give a short introduction to perfect slice sampling, point out incorrect methods, and give a new improved version of the original algorithm. (author's abstract)<br>Series: Preprint Series / Department of Applied Statistics and Data Processing

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13

Woo, Hin Kyeol. "Multiscale fractality with application and statistical modeling and estimation for computer experiment of nano-particle fabrication." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45819.

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The first chapter proposes multifractal analysis to measure inhomogeneity of regularity of 1H-NMR spectrum using wavelet-based multifractal tools. The geometric summaries of multifractal spectrum are informative summaries, and as such employed to discriminate 1H-NMR spectra associated with different treatments. The methodology is applied to evaluate the effect of sulfur amino acids. The second part of this thesis provides essential materials for understanding engineering background of a nano-particle fabrication process. The third chapter introduces a constrained random effect model. Since

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14

Huang, Huan. "Optimizing Deposition of Matrix and Ionization Salt via Two-Step Sublimation in Sample Preparation for Surface-Layer Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Imaging (SL-MALDI-TOF MSI)." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1619183035472425.

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15

Mathisen, Martin Borlaug. "In-Situ Tensile Testing Combined with EBSD Analysis of Ti-6Al-4V Samples from Components Fabricated by Additive Layer Manufacture." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18905.

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ALM-based production of Titanium components shows great promise in supplying cost-effective products within industries such as energy, chemical processing and aerospace. In common for all is high quality demands. This necessitates extensive research into the intricacies of this production process. Complex microstructures comprised of columnar remnants of directionally solidified &#946;-Titanium, with interior inhabited by colonies of finer &#945;-plate structures were found in samples produced by layered plasma welding of alloy Ti-6Al-4V. Utilising the powerful characterisation tool of

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16

Baccaro, Alexandre Luiz Bonizio. "Aperfeiçoamento de sistema de preparo de amostras em microescala por processamento fotoeletrocatalítico de matéria orgânica em célula eletroquímica irradiada com UV-LED, visando à análise de traços de metais." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-28052012-104226/.

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A aplicação do processo de fotoeletrocatálise à eliminação de interferentes orgânicos em baixa concentração na eletroanálise de metais foi abordada tomando o quelato Cu(II)-EDTA como sistema modelo e o restabelecimento da onda voltamétrica do cobre como indicador de efetividade. Desenvolveram-se células eletroquímicas de camada delgada (espessura de 600 micrômetros) nas quais alguns microlitros de amostra são tratados sobre um eletrodo modificado com TiO2 (tipo P25, rico em anatase), cuja superfície é irradiada através de uma janela por um LED (370 nm). Foram construídos e avaliados os seguint

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17

Gouedji, Gnamba Emmanuel. "Les séquences mafiques-ultramafiques de Samapleu et leur minéralisation en Ni-Cu-EGP : un dyke éburnéen (2,09 Ga) du complexe lité Yacouba (domaine archéen de Man - Côte d'Ivoire)." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2051.

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Le complexe mafique–ultramafique lité Yacouba est intrusif au sein des granulites gneissiques du domaine archéen de Man (3,6-2,78 Ga) dans la région de Biankouma-Sipilou (ouest de la Côte d'Ivoire). Dans le secteur de Samapleu, il est composé de trois entités ; dépôt principal de Samapleu (SM), l’Extension 1 de Samapleu (E1) et l’occurrence de Yorodougou (Yo). Il comprend des horizons de webstérites, péridotites, chromitites, norites, gabbro-norites. Ces horizons (épaisseur cumulée de 80 à 200 m) sont inclinés de 70 à 80° vers le SE ; présentent une zonation concentrique, qui sont autant de ca

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18

Söderström, Hanna. "Semipermeable membrane devices as integrative tools for monitoring nonpolar aromatic compounds in air." Doctoral thesis, Umeå University, Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-378.

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<p>Air pollutants pose a high risk for humans, and the environment, and this pollution is one of the major environmental problems facing modern society. Active air sampling is the technique that has been traditionally used to monitor nonpolar aromatic air pollutants. However, active high volume samplers (HiVols) require a power supply, maintenance and specialist operators, and the equipment is often expensive. Thus, there is a need to develop new, less complicated sampling techniques that can increase the monitoring frequency, the geographical distribution of the measurements, and the number o

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19

Subercaze, Alexandre. "Utilisation combinée des rayons X et gamma émis lors de l'interaction avec la matière d'ions légers aux énergies intermédiaires : des mécanismes primaires de réaction aux applications." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2017. http://www.theses.fr/2017IMTA0053/document.

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PIXE (Particle Induced X-ray Emission) et PIGE (Particle Induced Gamma-ray Emission) sont des méthodes d’analyse par faisceau d’ions, multiélémentaires et non destructives. Elles sont basées sur la détection des rayons X et gamma caractéristiques émis suite à l’interaction de particules chargées avec la matière. La méthode PIXE permet de quantifier les éléments de numéro atomique Z>11 avec une limite de détection au niveau du μg/g (ppm). Les rayons X émis par les éléments légers (Z<11) sont fortement atténués par la matière, limitant la sensibilité de PIXE pour cette gamme de numéro atom

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20

Skoupý, Radim. "Quantitative Imaging in Scanning Electron Microscope." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-432610.

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Tato práce se zabývá možnostmi kvantitativního zobrazování ve skenovacím (transmisním) elektronovém mikroskopu (S|T|EM) společně s jejich korelativní aplikací. Práce začíná popisem metody kvantitativního STEM (qSTEM), kde lze stanovenou lokální tloušťku vzorku dát do spojitosti s ozářenou dávkou, a vytvořit tak studii úbytku hmoty. Tato metoda byla použita při studiu ultratenkých řezů zalévací epoxidové pryskyřice za různých podmínek (stáří, teplota, kontrastování, čištění pomocí plazmy, pokrytí uhlíkem, proud ve svazku). V rámci této části jsou diskutovány a demonstrovány možnosti kalibračníh

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21

Delignat-Lavaud, Antoine. "On the security of authentication protocols on the web." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEE018/document.

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Est-il possible de démontrer un théorème prouvant que l’accès aux données confidentielles d’un utilisateur d’un service Web (tel que GMail) nécessite la connaissance de son mot de passe, en supposant certaines hypothèses sur ce qu’un attaquant est incapable de faire (par exemple, casser des primitives cryptographiques ou accéder directement aux bases de données de Google), sans toutefois le restreindre au point d’exclure des attaques possibles en pratique?Il existe plusieurs facteurs spécifiques aux protocoles du Web qui rendent impossible une application directe des méthodes et outils existan

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22

Pal, Terek. "Unapređenje kvaliteta alata za livenje pod pritiskom primenom tehnologija inženjerstva površina." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2016. http://www.cris.uns.ac.rs/record.jsf?recordId=101472&source=NDLTD&language=en.

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Proučavane su koroziona postojanost i tendencija lepljenja različitihmaterijala u kontaktu sa tečnom Al–Si–Cu legurom. Ispitivanjem suobuhvaćeni čelik za rad na toplo, plazma nitrirani čelik i dupleksslojevi sa CrN, TiAlN, TiAlSiN i CrAlN prevlakama, različitog nivoapovršinske hrapavosti. Za ispitivanja pomenutih fenomenaprimenjena je metoda izvlačenja, koja je unapređena kako bi se povećalenjena tačnost i verodostojnost simulacije procesa livenja. Korozioniefekti su pojačani tako što su uzorci osim kratkog kontakta sa odlivkomzadržavani i u dužim periodima u kontaktu sa tečnom leg

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23

Kosmata, Marcel. "Elastische Rückstoßatomspektrometrie leichter Elemente mit Subnanometer-Tiefenauflösung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-84041.

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In der vorliegenden Arbeit wird erstmals das QQDS-Magnetspektrometer für die höchstauflösende Ionenstrahlanalytik leichter Elemente am Helmholtz-Zentrum Dresden-Rossendorf umfassend vorgestellt. Zusätzlich werden sowohl alle auf die Analytik Einfluss nehmenden Parameter untersucht als auch Methoden und Modelle vorgestellt, wie deren Einfluss vermieden oder rechnerisch kompensiert werden kann. Die Schwerpunkte dieser Arbeit gliedern sich in fünf Bereiche. Der Erste ist der Aufbau und die Inbetriebnahme des QQDS-Magnetspektrometers, der zugehörige Streukammer mit allen Peripheriegeräten und des

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24

Assunção, Marisa Sofia de Oliveira. "High-performance thin-layer chromatography detection of globotriaosylceramide in urine samples : improvement of the method and sampling." Master's thesis, 2012. http://hdl.handle.net/1822/23027.

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Dissertação de mestrado em Genética Molecular<br>Fabry disease (FD) is a lysosomal storage disorder caused by deficient or null production of the enzyme α-galactosidase A (α-Gal A) as a result of mutations in α-galactosidase A gene (GLA), located on the X chromosome. The systemic accumulation of α-Gal A substrates, which are excreted in urine, leads to progressive damage of several organs and tissues and ultimately results in death due to heart failure, renal failure and cerebrovascular accidents. Many studies are focused in diagnosing FD through measurement of α-Gal A activity in blood and o

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25

Suarez, Kaitlyn. "In-situ Zircon and Monazite Geochronology from Compositionally Distinct Layers in a Single Migmatitic Paragneiss Sample Located in the Eastern Adirondack Mountains, NY." 2019. https://scholarworks.umass.edu/masters_theses_2/799.

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Migmatites are a common rock type in the Adirondack Mountains, NY. We analyzed a single sample of biotite-garnet-sillimanite paragneiss with foliation parallel leucosome along Route 22 south of Whitehall, NY in order to determine the timing of melting using both in-situ monazite and zircon U/Pb geochronology from the restite and leucosome layers of the same rock. Monazite was analyzed via in-situ EMPA on the Ultrachron microprobe at the University of Massachusetts. Zircon was analyzed via LA-ICP-MS (in-situ and mounted mineral separates) at the LaserChron Center. Monazite analyses from the res

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26

Rogalsky, Christine Jane. "Application of a Network Model for Complex Fenestration Systems." Thesis, 2011. http://hdl.handle.net/10012/6211.

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In the fight to reduce carbon emissions, it is easy to see the necessity of reducing energy consumption. Buildings consume a large amount of energy, and have significant potential for energy savings. One tool for realising these potential savings is building simulation. To be able to use building simulation, accurate models for windows are needed. The models include individual layer models, to determine the solar and longwave radiative behaviours, as well as whole-system models to determine heat flows through the various layers of fenestration systems. This thesis looks at both kinds of models

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27

Lu, Guan-Huei, and 呂冠慧. "Preparation of layer double hydroxide as sorbent for headspace solid-phase microextraction of halophenols in environmental samples for GC-ECD analysis." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4j4fw2.

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碩士<br>國立中興大學<br>化學系所<br>107<br>A layered double hydroxide (LDH) material was prepared and coated onto the surface of glassy fiber as a sorbent of solid phase microextraction (SPME) to collect halo-phenols in aqueous samples by headspace sampling for GC-ECD analysis. The LDH material was prepared by mixing magnesium nitrate and aluminum nitrate in water homogeneously and adjusted the pH to 10, then reflux for 24 hrs at 100 oC. After washing with water to neutral and then by alcohol, the LDH was formed posterior to dry in an oven. The SPME-LDH sorbent was prepared by dip-coating a glassy fiber i

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28

Akkad, Rami [Verfasser]. "Determination of organophosphorus and carbamate insecticides in food samples by high-performance thin-layer chromatography multi-enzyme inhibition assay / vorgelegt von Rami Akkad." 2011. http://d-nb.info/1011981904/34.

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29

Chen, Yu-yu, and 陳佑瑜. "Investigations of the Anisotropic Property of Nonpolar a-plane GaN,(11-22) Semipolar InGaN/GaN Multiple Quantum Wells and the Effects of Growth Time of Low-Temperature Buffer Layer on the Sample Quality of N-polar GaN." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/89652905252422884918.

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碩士<br>國立高雄大學<br>應用物理學系碩士班<br>99<br>This thesis studies the anisotropic properties of N-polar GaN, nonpolar a-plane GaN, and (11-22) semipolar InGaN/GaN MQW samples grown by MOVCD. The optical and material properties were investigated by photoluminescence (PL), and time-resolved PL measurements, atomic force microscopy (AFM), field-emission electron microscopy (FE-SEM), and cathodoluminescence (CL). First, for N-polar GaN samples, we study the effects of the buffer layer growth times on the material and optical properties of three N-polar GaN samples with different growth times (114, 120, and 1

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30

Kosmata, Marcel. "Elastische Rückstoßatomspektrometrie leichter Elemente mit Subnanometer-Tiefenauflösung." Doctoral thesis, 2011. https://tud.qucosa.de/id/qucosa%3A25920.

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In der vorliegenden Arbeit wird erstmals das QQDS-Magnetspektrometer für die höchstauflösende Ionenstrahlanalytik leichter Elemente am Helmholtz-Zentrum Dresden-Rossendorf umfassend vorgestellt. Zusätzlich werden sowohl alle auf die Analytik Einfluss nehmenden Parameter untersucht als auch Methoden und Modelle vorgestellt, wie deren Einfluss vermieden oder rechnerisch kompensiert werden kann. Die Schwerpunkte dieser Arbeit gliedern sich in fünf Bereiche. Der Erste ist der Aufbau und die Inbetriebnahme des QQDS-Magnetspektrometers, der zugehörige Streukammer mit allen Peripheriegeräten und de

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