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Дисертації з теми "(Sem) Scanning"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

McKeown, Karen. "Using scanning electron microscopy (SEM) and transmission electron nncroscopy." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492019.

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Electron impact excitation collisions are important processes for spectral line formation of plasmas. The work undertaken in this thesis focuses on such collisions involving Li-like ions, important in both astrophysical and magnetically confined plasmas. By having reliable atomic and collisional data, such as energy levels, radiative rates and excitation rate coefficients, it is possible to generate models to describe such plasmas. The atomic data were calculated using the General-Purpose Relativistic Structure Program (GRASP; Dyall et al 1989), for several Li-like ions, namely S XIV, Ar XVI,

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2

Liu, Yangmingyue. "Scanning Electron Microscopy To Probe Working Nanowire Gas Sensors." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1256.

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This study is dedicated to the implementing of Electron-Beam-Induced Current (EBIC) microscopy to study the behavior of metal oxide semiconducting (MOS) nanowire (NW) gas sensor in situ under exposure to different environment. First, we reported the development of a single nanowire gas sensor compatible with an environmental cell. The major component of the device we use in this study is a single SnO2 nanowire attached to an electron transparent SiN membrane (50-100 nm thick), which was used for mounting nanowire working electrodes and surface imaging of NW. First the NW's conductivity is inve

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3

Ê¿AzÌ£iÌ„m, MuhÌ£ammad. "Ultra high vacuum-scanning electron microscope studies of Cs/Si(100)-2x1." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385984.

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4

Farley, A. N. "An environmental control stage for the scanning electron microscope." Thesis, University of Bristol, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379674.

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5

Jenei, István Zoltán. "Scanning electron microscopy (SEM) analysis of tribofilms enhanced by fullerene-like nanoparticles." Licentiate thesis, Stockholms universitet, Fysikum, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-82153.

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The beneficiary effects of WS2 inorganic fullerene-like nanoparticles in the lubrication industry were shown in recent years. The incorporation of the nanoparticles into lubricants (oils, greases) is however not straightforward. When two surfaces are sliding against each other and a lubricant is used, a thin layer (tribofilm) is formed on the contact area, which effects the friction process. Lubricants usually contain several additives. These additives can impair the friction reducing behaviour of the WS2 inorganic fullerene-like nanoparticles. This thesis investigates the effects of several a

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6

MacDonald, Kinsey Elizabeth. "Analysis of Frozen Desserts Using Low-Temperature Scanning Electron Microscopy (LT-SEM)." Thesis, Clemson University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10982077.

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<p> Commercial vanilla ice cream and other frozen desserts from the United States were analyzed for ice crystal length using low-temperature scanning electron microscopy (LT-SEM). Average ice crystal length was determined using multiple micrographs of each sample/product. Out of the products tested, 11 out of 15 samples had an average ice crystal length above the consumer sensory threshold limit of 55 µm. Products containing stabilizers tended to have smaller average ice crystal lengths than products without stabilizers. With a few exceptions, lower fat products tended to have larger ice

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7

Hrubanová, Kamila. "Scanning Electron Microscopy and its Applications for Sensitive Samples." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-409082.

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Předložená dizertační práce s názvem “Rastrovací elektronová mikroskopie a její aplikace pro senzitivní vzorky” pojednává o problematice rastrovací elektronové mikroskopie v kontextu instrumentálního a metodologického vývoje vedoucího k inovativnímu řešení, které je dobře aplikovatelné zejména v mikrobiologickém výzkumu. Součástí práce je rozprava o historii a současném stavu elektronové mikroskopie (EM) jakožto vědecké zobrazovací a analytické techniky, tato část se nachází v úvodních kapitolách. Nepopiratelný přínos EM v biologických a lékařských oborech je dokazován mnoha citovanými vědecký

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8

Kothari, Anuja. "SEM Assessment of the Enamel Surface After Debonding of Ceramic Brackets." Thesis, NSUWorks, 2015. https://nsuworks.nova.edu/hpd_cdm_stuetd/72.

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Objective: This study was conducted to compare the shear bond strengths, patterns of bond failure and enamel surfaces after debonding two ceramic brackets (ClearVu and Radiance Plus) and one standard metal bracket (Mini Uni-Twin). Background: Ceramic brackets are an esthetic alternative to metal brackets. The mean shear bond strength of ceramic brackets is significantly greater than for metal brackets. Excessive bond strength can result in pain upon debonding, damage to the bracket or permanent damage to the enamel including flaking, cracks or tooth fracture. Numerous studies have evaluated te

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9

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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10

Kawano, Kayoko. "Application of the ultra high resolution, low voltage scanning electron microscopy in the materials science." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/application-of-the-ultra-high-resolution-low-voltage-scanning-electron-microscopy-in-the-materials-science(341c7955-1da7-49be-9dd3-a3f3248bae05).html.

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The efficiency of low voltage scanning electron microscopy, which presents near-surface information, has been well known for a long time. However, it is not widely known that the high resolution capability can only be achieved when the surface reveals the original characteristics of the materials without any deterioration due contamination. Therefore, initial attention in this study is directed at clarifying the efficient use of the ultra high resolution, low voltage SEM (UHRLV SEM), (Ultra55, Zeiss). The SEM images and the selected electrons for detection, and damage that occurs through UHRVL

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11

Öman, Love. "Examination of a Damaged Slitting Knife using Scanning Electron Microscopy and Finite Element Simulations." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-86126.

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At voestalpine Precision Strip AB, the slitting process is used frequently. Slitting is a commonly applied manufacturing technique during sheet metal processing that aims to split large coils of sheet metal into narrower widths. The coiled sheets are uncoiled and transferred to a slitter, where they pass between rotating circular knives that produce long and straight cuts, splitting the wide sheet into desired widths. However, during operation, their slitting knives are occasionally damaged. This means that the knives must be replaced, which wastes both time and money. The goal of this proje

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12

Lee, Moonyong. "In-situ morphological study of wustite scale growth in a hot stage environment SEM /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487266011224367.

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13

Egbujor, Grace. "Surface Microstructure Evolution of Metallic Specimens Using the Large Chamber Scanning Electron Microscope." TopSCHOLAR®, 2015. http://digitalcommons.wku.edu/theses/1473.

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An initial study into the use of the large chamber scanning electron microscope (LCSEM) to interrogate the surface microstructure evolution of metallic specimens has been carried out. The LC-SEM located at Western Kentucky University is the largest instrument of its type at any university in the world. As such, unique measurements can be performed due to the size of its chamber and extended view of its optic system. Strain was varied for each individual specimen, and imaged using Secondary Electrons within the gauge length as well as near the grip position. Results will show progression of sur

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14

PADIAL, ARMANDO G. F. "Transformacoes de fase e propriedades mecanicas de um aco maraging sem cobalto." reponame:Repositório Institucional do IPEN, 1994. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10381.

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Made available in DSpace on 2014-10-09T12:38:01Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:39Z (GMT). No. of bitstreams: 1 05580.pdf: 5974833 bytes, checksum: 186f4c952bed8c2c1e8b6f248587bbfc (MD5)<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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15

Aoki, Yoshiyuki. "Accurate enumeration and identification of Testacea (Protozoa, Rhizopoda) in forest soil using scanning electron microscopy." Elsevier, 2003. http://hdl.handle.net/2237/5307.

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16

Gaudenzi, de faria Marcelo. "Robust control for manipulation inside a scanning electron microscope." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2068/document.

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Cette thèse étudie le problème de nano-positionnement à l'intérieur d'un microscope électronique à balayage (MEB). Pour obtenir des informations de position avec rapidité et précision, une installation dédiée composée d’un vibromètre placé à l'intérieur du MEB a été mise en œuvre. Cette approche diffère de méthodes basées sur le traitement d'images, car elle permet de saisir des données en temps réel sur le comportement dynamique des structures étudiées. Dans une première étude, les perturbations mécaniques agissant à l'intérieur de la chambre à vide du microscope ont été caractérisées et leur

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17

Emanuelsson, Christian. "Scanning Electron Microscopy study of Macbat regeneration effect on lead-acid battery electrodes." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-27971.

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Electrodes from lead-acid batteries were studied using scanning electron microscopy and energy dispersive spectroscopy. This to observe the effects of cycling on the batteries and how a capacity recovery process, known as Macbat regeneration, affected the active material with focus on hard sulphation. First, two new batteries were cycled for two months and electrodes from them were studied when the batteries were new, cycled, fully charged after cycling and regenerated after cycling. Then electrodes from a separate battery that had been used in industry was studied prior to and after Macbat re

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18

Boateng, Akua F. "Comparison of the Ultrastructure of HTC And HTC-Reversed Cowpea Seeds Using Scanning Electron Microscopy." Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1263254192.

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19

Mguni, Nothando. "The influence of clay diagenesis on the petrophysical properties of sandstone reservoirs in the Pletmos Basin Offshore South Africa." University of Western Cape, 2020. http://hdl.handle.net/11394/7327.

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>Magister Scientiae - MSc<br>Pletmos Basin is a Mesozoic half graben located in the southern part of South Africa and has undergone numerous tectonic changes which involve alteration of structure and reworking of sediments. Clay diagenesis has become a more prominent factor affecting the quality of the tight shaly sandstone reservoirs in the southern Pletmos Basin. The present study focused on Block 11a as a primary area of interest .The tight sandstone reservoirs encountered in the four wells, viz. Ga-Q1, Ga- Q2, Ga-Z1 and Ga- E2 were studied using four different methods to incorporate and in

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20

Jordan, Kalisha. "Comparison of Epiphany® and AH-Plus® Root Canal Sealer Penetration of Dentinal Tubules: A SEM Study." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2505.

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The purpose of this study was to evaluate the effect of a final rinse of ethanol on depth of sealer penetration in teeth obturated with Gutta Percha (GP)/AH-Plus® (Dentsply, De Trey GmbH, Konstanz, Germany) or Resilon/Epiphany® SE™ (Pentron Clinical Technologies, LLC, Wallingford, CT). Extracted human anterior teeth (n= 32) were shaped to size 30, 0.06 taper using nickel-titanium rotary files and subjected to an identical irrigation protocol. Specimens were randomly divided into eight groups according to final irrigating solution (saline, 70%, 95%, or 100% ethanol) and obturation material (GP

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21

Jabůrek, Ladislav. "Metoda napěťového kontrastu při detekci sekundárních elektronů scintilačním detektorem ve VP SEM." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219045.

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This thesis deals with scanning electron microscope working at higher pressure in the specimen chamber. The main goal was to study the voltage contrast on the PN junction of the transistor under suitable working conditions for using environmental scanning microscope. The observation of sample was enabled by a scintillation detector designed for observation of high pressure.

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22

Myers, Eric J. "Finite Element Modeling (FEM) of Porous Additively Manufactured Ferromagnetic Shape Memory Alloy Using Scanning Electron Micrograph (SEM) Based Geometries." Youngstown State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ysu149399154152881.

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23

Stein, Tobias, Marcel Wicke, Angelika Brueckner-Foit, et al. "Crack growth behavior in an aluminum alloy under very low stress amplitudes." Cambridge University Press, 2017. https://tud.qucosa.de/id/qucosa%3A70663.

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The near-threshold behavior of long cracks is studied in this paper using precracked flat dogbone specimens of a commercial aluminum alloy in peak-aged and overaged conditions. After introducing the initial crack in compression precracking, the crack was propagated approximately with the constant range of the stress intensity factor at values just above or below the corresponding threshold values. It was found that there were two major mechanisms which kept the crack from continuous extension. First, the crack front was pinned by primary precipitates. This effect was rather pronounced and lead

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24

Toth-Antal, Bence Materials Science &amp Engineering Faculty of Science UNSW. "Development of copper-alumina composites for abrasive wear applications." Awarded By:University of New South Wales. Materials Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/44504.

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Copper-alumina composites were developed for testing in abrasive wear applications. The composites featured a porous continuous ceramic-preform network infiltrated by a liquid metal to form the final consolidated composite. The liquid metal phase was pure copper. Six different ceramic preform variants were tested. Ceramic volume fractions of 40, 50 and 60% were used, of two preform types; one pure-alumina, and one with additional 2wt% copper(I) oxide (CU20), functioning as an infiltration aid, the effects of which were determined in a previous study; the copper-oxide reduced infiltration pres

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25

GARG, AISHWARYA KUMAR. "A STUDY ON INFLUENCE OF WASTE RUBBER TYRE CRUMBS ON STRENTH OF SOIL." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2019. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18824.

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Tyres used in automobile industries get converted into waste tyres as soon as their treads are worn out. Hence, every year there is an increase in the waste tyres worldwide. As a result, their disposal has become one of the major environmental problems. Millions of discarded tyres are rejected in large piles across the land of a territory as well as dumped in large amount in the landfills every year. These are a threat to the environment because they lead to environmental pollution as well as have a potential to cause fire and health hazards. Being light in weight and having low density as com

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26

Burnstock, Aviva Ruth. "The application of scanning electron microscopy (SEM) to the examination of painting materials with special reference to cleaning and blanching." Thesis, Courtauld Institute of Art (University of London), 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339397.

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27

Agioutanti, Eleftheria. "An Improved Thermogravimetric Analysis Method for Respirable Coal Mine Dust and Comparison to Results by SEM-EDX." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/91984.

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It has long been known that chronic exposures to high concentrations of respirable coal mine dust can lead to the development of lung diseases such as Coal Worker's Pneumoconiosis, commonly referred to as "black lung", and silicosis. Since the mid-1990s, an alarming resurgence of diseases has been documented in central Appalachia, where underground mining often necessitates significant extraction of rock strata along with the thin seams of coal. These circumstances have prompted concern over if or how changing dust composition might be a factor in contemporary disease prevalence. Until now, t

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28

Helm, Conrad, and María Capa. "Comparative analyses of morphological characters in Sphaerodoridae and allies (Annelida) revealed by an integrative microscopical approach." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-159898.

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Sphaerodoridae is a group of benthic marine worms (Annelida) characterized by the presence of spherical tubercles covering their whole surface. They are commonly considered as belonging to Phyllodocida although sistergroup relationships are still far from being understood. Primary homology assessments of their morphological features are lacking, hindering the appraisal of evolutionary relationships between taxa. Therefore, our detailed morphological investigation focuses on different Sphaerodoridae as well as on other members of Phyllodocida using an integrative approach combining scanning ele

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29

Koudela, Oldřich. "Kontrast v obraze získaném pomocí scintilačního detektoru sekundárních elektronů ve VP SEM." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219044.

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First part of this thesis is a theoretical essay which deals with the basics of scanning electron microscopy, with structure and function of a scanning electron microscope, its’ special case of an various pressure scanning electron microscope, electron interaction with surrounding environment and with a scintillation detector. The applied part of the thesis is focused on evaluation of material contrast on Cu-W specimen. Material contrast is evaluated for different pressures of water vapors in the microscope specimen chamber and for different detection conditions.

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30

McMullen, Amelia Marie. "E-SEM Characterization of Escherichia coli Biofilms Grown on Copper- and Silver-Alloyed Stainless Steels over a 48 -." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/95856.

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The formation of bacterial biofilms on surfaces and their subsequent biofouling pose extensive safe and healthy concerns to a variety of industries. Biofilms are ubiquitous, and the biofilm state is considered the default mode of growth for the majority of the world's bacteria population. Once mature, biofilms are difficult to remove completely and have improved resistance against antibacterial agents. Given this, there has been significant interest to mitigate or at least manage biofilm formation on surfaces. One such method has been through the material design of surfaces, and to the interes

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31

Axman, Tomáš. "Optimalizace UHV SEM pro studium nanostruktur v širokém rozsahu teplot." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382282.

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Анотація:

This diploma thesis deals with the optimization of ultra-high vacuum scanning electron microscope - UHV SEM, which is developed within the Amispec project in cooperation with BUT, Institute of Scientific Instruments of the Czech Academy of Science and Tescan Brno, s.r.o. The theoretical part deals with the description of the actual state of the developed equipment and the research of competing systems. The next part describes the optimization of the sample holder and the pallet receptor for studying nanostructures over a wide range of temperatures. Part of the optimization is the sapphire ther

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32

Peterson, Fern Sterling. "A Statistical Treatment of Non-Normal SEM Data and the Application to Designed Fiber/Filler/Polymer Structures." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7961.

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One of the primary objectives of this thesis was to design fiber/filler/polymer structures for newsprint and in the process develop a greater understanding of fiber/filler/ polymer structures. Five different designed structures were created for study. The designed structures were composed of virgin, hydrosulfite bleached, TMP southern pine, Georgian kaolin clay and various polymers. Five filler levels from 0% to 20% were employed with each of these different structures. Numerous physical tests were used to gather data which would help to develop an understanding for the macroscopic properties

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33

Račanský, David. "Scintilační detektor sekundárních elektronů pro VP SEM." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219370.

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Анотація:

First part of this thesis is a theoretical essay which deals with the basics of the variable pressure scanning electron microscope, includes detection of secondary electrons with a view to a scintillation detector. The first applied part of the thesis is focused on prediction, measuring and setting-up optional working parley in vacuum electrodes scintillation detector system, with a stress small diameter hole in screenings C1 and C2. Second applied part was verify a change of working distance between sample and detector in consequence to optional solution for another work.

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34

Bolton, Samuel John. "The Nematalycidae (Acariformes): An exploration of large-scale morphological variation and evolution using low-temperature scanning electron microscopy." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461084499.

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35

Easterly, Danielle E. "An Investigation of Surface Characteristics of Enamel Treated with Infiltrative Resin: A Scanning Electron Microscopy Study." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4764.

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Анотація:

AN INVESTIGATION OF SURFACE CHARACTERISTICS OF ENAMEL TREATED WITH INFILTRATIVE RESIN: A SCANNING ELECTRON MICROSCOPY STUDY Danielle E. Easterly, Doctorate of Dental Surgery. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University. Virginia Commonwealth University. 2017. Director: Dr. Eser Tüfekçi D.D.S., M.S., Ph.D., M.S.H.A. Objective: To evaluate the microstructural changes of a resin infiltrant (ICON®, DMG America LLC, Englewood, NJ) after six months of simulated toothbrushing. Materials and Methods:

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36

Černoch, David. "Ionizační detektor pro EREM." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217868.

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This graduation theises deal with influence of an additional grating possitioned berween the sample and the ionisation detektor of the environmental scannin elektron microscope on signal detection. Signal level is measured for changing pressure, at different voltages on the aditional grating, at different sample - additional electrode distance and at different sample - detektor distance. Influence of the additional grating is simulated for real working conditions on PC.

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Johann, Victoria Anne. "Development and Implementation of an Automated SEM-EDX Routine for Characterizing Respirable Coal Mine Dust." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73367.

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This thesis describes the development and use of a computer-automated microscopy routine for characterization of respirable dust particles from coal mines. Respirable dust in underground coal mining environments has long been known to pose an occupational health hazard for miners. Typically following years of exposure, coal workers' pneumoconiosis (CWP) and silicosis are the most common disease diagnoses. Although dramatic reductions in CWP and silicosis cases were achieved across the US between about 1970-1999 through a combination of regulatory dust exposure limits, improved ventilation and

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38

Buyukyagci, Arzu. "Synthesis And Characterization Of Monoacetylferrocene Added Sulfonated Polystyrene Ionomers." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/3/1108026/index.pdf.

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Incorporation of monoacetylferrocene to the sulfonated polystyrene ionomers imparted some changes in the properties of sulfonated polystyrene. Sulfonation was carried out by acetic anhydride and concentrated sulphuric acid. The sulfonation reaction and the degree of sulfonation were determined by analytical titration and adiabatic bomb calorimeter . For this purpose, sulfonated polystyrene (SPS) samples with varying percentages of sulfonation were prepared between 0.85% and 6.51%. Monoacetyl ferrocene was used in equivalent amount of sulfonation through addition procedure. FTIR Spectroscopy wa

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Rivera, Felipe. "Solid Phase Crystallization of Vanadium Dioxide Thin Films and Characterization Through Scanning Electron Microscopy." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2233.pdf.

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40

Steiner, Alexis K. "3D Digitization and Wear Analysis of Sauropod Teeth." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1525990888624381.

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41

Červenka, Jiří. "Povrchová analýza nanokompozitu xGnP/PEI." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216900.

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Анотація:

Tato Diplomová práce se zabývá povrchovou analýzou nanokompozitní folie polyetherimidu (PEI) vyztuženého exfoliovanými grafitickými nanodestičkami (xGnP). Analyzovány byly take vzorky nevyztužené PEI folie a samostatné nanodestičky. Vzorky nanokompozitu a PEI folie byly plazmaticky leptány s využitím argonového plazmatu po dobu 1, 3 a 10 hod. Skenovací elektronová mikroskopie (SEM) byla použita pro charakterizaci samostatných nanodestiček rozptýlených na křemíkovém substrátu, původních či leptaných vzorků PEI folie a nanokompozitu. Nanodestičky byly identifikovány při povrchu leptané nanokompo

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SANTOS, CARLOS A. X. "Estudo do compósito 3Y-TZP/Sisub(2)Nsub(2)O obtido por sinterização sem pressão." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11430.

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Made available in DSpace on 2014-10-09T12:51:50Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:08:58Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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43

Engerdahl, Tomas. "Tools of the Trade : An analysis using conservation and SEM of the context and iron material from the excavation of House X in the city block Humlegården 3 in Sigtuna." Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-82870.

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Sigtuna’s trade and production has been the subject of an increasing amount of archaeological investigations during the last 30 years. However, most of the research has been conductedregarding the buildings, coin mints and precious metal objects. This thesis will instead research one of the basics of the production, namely the iron. By reviewing the iron objectsand currency bars from house X in the city block Humlegården 3. Through high precision studies with conservation and scanning electron microscope I will be able to come one step closer to identifying what sort of items were produced on

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Ndangili, Peter Munyao. "Amperometric biosensor systems prepared on poly (aniline-ferrocenium hexafluorophosphate) composites doped with poly(vinyl sulfonic acid sodium salt)." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_6605_1263418223.

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<p>The main hypothesis in this study is the development of a nanocomposite mediated amperometric biosensor for detection of hydrogen peroxide. The aim is to combine the electrochemical properties of both polyaniline and ferrocenium hexafluorophosphate into highly conductive nano composites capable of exhibiting electrochemistry in non acidic media<br>shuttling electrons between HRP and GCE for biosensor applications.</p>

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Blom, Tobias. "Fabrication and Applications of a Focused Ion Beam Based Nanocontact Platform for Electrical Characterization of Molecules and Particles." Doctoral thesis, Uppsala universitet, Experimentell fysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-122940.

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The development of new materials with novel properties plays an important role in improving our lives and welfare. Research in Nanotechnology can provide e.g. cheaper and smarter materials in applications such as energy storage and sensors. In order for this development to proceed, we need to be able to characterize the material properties at the nano-, and even the atomic scale. The ultimate goal is to be able to tailor them according to our needs. One of the great challenges concerning the characterization of nano-sized objects is how to achieve the physical contact to them. This thesis is f

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Koganemaru, Reina. "Reduced cuticular penetration as a contributor to insecticide resistance in the common bed bug, Cimex lectularius L." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73497.

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The Common bed bug, Cimex lectularius L., suddenly reappeared in developed countries in the past 15 years. The factor contributing to the sudden resurgence of the bed bugs is insecticide resistance. In this study, we investigated the mechanisms of reduced cuticular penetration type insecticide resistance in bed bugs. First, we determined and compared the lethal dosage (LD50) of a pyrethroid insecticide using topical and injection application. The resistant strain not only had significantly greater resistance ratios, but also demonstrated significantly greater penetration resistance ratios.

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Havlíček, Petr. "Design elektronového mikroskopu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229634.

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The aim of my Master's thesis is the design of a scanning electron microscope. The designed concept presents an innovative approach to the problems and respects all technical, ergonomic and aesthetical demands made on it. The main creative part of design process starting from the concept development and ending up with the final solution is preceded by a background research study including a historical, technical and design analysis of the electron microscope. The conclusion of my Master's thesis analyses the final design, its character and its contribution in broader context.

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Vieira, Isabela Defilipo. "Verificação da presença e abertura dos túbulos dentinários em pacientes portadores de recessão gengival com e sem hipersensibilidade dentinária por microscopia eletrônica de varredura." Universidade Federal de Juiz de Fora, 2011. https://repositorio.ufjf.br/jspui/handle/ufjf/1760.

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Анотація:

Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-07-13T11:30:14Z No. of bitstreams: 1 isabeladefilipovieira.pdf: 8371315 bytes, checksum: b4b3254d5ed0348cbbbb19599448153f (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2016-07-13T11:51:38Z (GMT) No. of bitstreams: 1 isabeladefilipovieira.pdf: 8371315 bytes, checksum: b4b3254d5ed0348cbbbb19599448153f (MD5)<br>Made available in DSpace on 2016-07-13T11:51:38Z (GMT). No. of bitstreams: 1 isabeladefilipovieira.pdf: 8371315 bytes, checksum: b4b3254d5ed0348cbbbb19599448153f (MD5) Previous

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Jespersson, Niklas, and Torbjörn Sandberg. "Evaluation of different non-metallic inclusions in steel chips by using electrolytic extraction : Evaluation of a methodology for electrolytic extraction and scanning electron microscopy - energy dispersive spectroscopy (SEM-EDS) analysis." Thesis, KTH, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298419.

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Анотація:

Analysing non-metallic inclusions (NMI) by conventional microscopy is prone to errors. Better imaging can be achieved by using electrolytic extraction (EE) to effectively dissolve the metal matrix, freeing the inclusions so that they can be collected on a filter. This method of studying NMI was tested on a 157C steel chip, with EE taking place three times on the same surface with increasing levels of charge applied. The relationship between charge and extracted layer depth was examined, so as to facilitate the targeting of NMI from specific depths. A selection of the extracted incl

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Oubellil, Raouia. "Modeling and control of a SEM-integrated nano-robotic system driven by piezoelectric stick-slip actuators." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT117.

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Анотація:

La capacité de réaliser des tâches robotiques dextres à l'échelle nanométrique dans un microscope électronique à balayage (MEB) est un enjeu crucial pour les nanotechnologies. Les systèmes nano-robotiques dédiés à des applications sous MEB ont ainsi émergé dans de nombreux laboratoires de robotique. Ils peuvent être composés d'un ou de plusieurs actionneurs intégrés à des plateformes nano-robotiques avec un ou plusieurs effecteurs. L’actionneur Piézoélectrique Stick-Slip (PSS) est l'un des meilleurs candidats pour actionner les systèmes nano-robotiques dédiés à des applications sous MEB car il

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