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Dissertations / Theses on the topic 'Laser scannig'

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Published: 28 June 2021
Last updated: 29 July 2025

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1

Rodrigues, Lidiany Karla Azevedo. "O uso do laser de CO2 na prevenção da carie dentaria." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288097.

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Orientador: Marines Nobre dos Santos Uchoa<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-04T20:08:54Z (GMT). No. of bitstreams: 1 Rodrigues_LidianyKarlaAzevedo_D.pdf: 4376856 bytes, checksum: 25da7c3f75a95b91dee027db3b7a19fa (MD5) Previous issue date: 2005<br>Resumo: A irradiação do esmalte dental com laser de CO2, especialmente se associada ao flúor, aumenta a resistência deste substrato ao desafio ácido. Deste modo, esta tese, constituída por 3 artigos, teve por objetivos: (1) descrever as característi
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2

Penk, David. "Vyhotovení 3D modelu části budovy SPŠ stavební Brno." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2021. http://www.nusl.cz/ntk/nusl-444256.

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The thesis deals with the creation of a 3D model from data collected by laser scanning. The first part deals with the theoretical foundations of buildings information modeling and method of laser scanning. The rest of the work describes the detailed process from data collection to the creation of the model. Most of the space is devoted to work in the Revit software environment.
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3

Pan, Jingyi. "Confocal scanning laser tomography and scanning laser Doppler flowmetery in the rat eye." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ49422.pdf.

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4

Svedberger, Johan, and Jonas Andersson. "Laser scanning in manufacturing industries : The potential and usability of laser scanning for industrial applications." Thesis, KTH, Industriell produktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134954.

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Making mistakes or discovering errors too late in the factory layout process is very costly. Unfortunately, the layouts aren’t always accurate or updated which creates a degree of uncertainty when it comes to installation of new equipment and rebuilding facilities. It also leads to a lot of waste in movement when employees has to go out in production to perform measurements, take pictures and take notes in order to remember important details to avoid errors. Lasers in land and engineering surveying instruments have been widely used for the last 30 years. A natural development has been to add a
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5

Shinpaugh, Kevin A. "Measurements in the bimodal region of a wing-body junction flow with a rapidly-scanning two-velocity-component laser-Doppler velocimeter." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-163435/.

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6

葉社榮 and Sair-wing Yip. "Discontinuity survey using laser scanning technology." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B30431670.

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7

Maillaud, Fabrice Franck Maurice. "Performance enhancement of laser scanning displays." Thesis, University of the West of England, Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311879.

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8

Sexton, Cornelius Leo. "Rapid Alloy Scanning by laser cladding." Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320605.

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9

Chen, Kenwei. "Intelligent scanning in selective laser sintering /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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10

Townsend, Russell James. "Experimental study of a scanning laser doppler flowmeter." University of Western Australia. Centre for Ophthalmology and Visual Science, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0063.

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[Truncated abstract] Purpose: To improve our ability to interpret and validate Heidelberg Retina Flowmeter (HRF) flow images by recording flow measurements from specific regions of the retinal vasculature in in-vitro and in-vivo eye models in which retinal blood flow can be manipulated. Methods: The first experiments utilised an isolated perfused pig eyes perfused with a 50%/50% Krebs/RBC solution at known flow rates ranging from zero to 300 μl/min. After HRF image acquisition, the retinal vasculature was perfused with fluorescein isothiocyanate (FITC), for fluorescence microscopy. Using the s
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11

ALMEIDA, IVAN A. de. "Otimização do processo de usinagem de titânio com laser pulsado de neodímio." reponame:Repositório Institucional do IPEN, 2007. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11589.

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Made available in DSpace on 2014-10-09T12:53:36Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:08:47Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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12

Hetherington, David. "Terrestrial laser scanning of the river environment." Thesis, University of Salford, 2009. http://usir.salford.ac.uk/26714/.

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This thesis describes the results of three field studies concerned with the utilisation of terrestrial laser scanning in the river environment, over different spatial scales. Existing research and technical literature has also been reviewed relating to scale, form and process in the river environment, conventional measurement techniques and the general utility and testing of terrestrial laser scanning technology. In physical geography and geomorphology, scales of interest in the river environment can range from very small scales such as an individual grain up to large scales that cover entire
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13

Denby, Alistair John. "Intelligent laser scanning for computer aided manufacture." Thesis, Nottingham Trent University, 2006. http://irep.ntu.ac.uk/id/eprint/210/.

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Reverse engineering requires the acquisition of large amounts of data describing the surface of an object, sufficient to replicate that object accurately using appropriate fabrication techniques. This is important within a wide range of commercial and scientific fields where CAD models may be unavailable for parts that must be duplicated or modified, or where a physical model is used as a prototype. The three-dimensional digitisation of objects is an essential first step in reverse engineering. Optical triangulation laser sensors are one of the most popular and common non-contact methods used
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14

Vieira, Pedro Manuel Cardoso. "Tomographic imaging with a scanning laser ophtalmoscop." Doctoral thesis, FCT - UNL, 1999. http://hdl.handle.net/10362/1135.

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Retinal imaging with a confocal scaning laser Ophthalmoscope (cSLO) involves scanning a small laser beam over the retina and constructing an image from the reflected light. By applying the confocal principle, tomographic images can be produced by measuring a sequence of slices at different depths. However, the thickness of such slices, when compared with the retinal thickness, is too large to give useful 3D retinal images, if no processing is done. In this work, a prototype cSLO was modified in terms hardware and software to give the ability of doing the tomographic measurements with the ma
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15

Pankajakshan, Praveen. "Blind deconvolution for confocal laser scanning microscopy." Nice, 2009. http://www.theses.fr/2009NICE4057.

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La microscopie confocale à balayage laser est une technique puissante pour étudier les spécimens biologiques en trois dimensions (3D) par sectionnement optique. Bien qu’ubiquitaire, il persiste des incertitudes dans le procédé d’observations. Comme la réponse du système à l’impulsion, ou fonction de flou (PSF), est dépendante à la fois du spécimen et des conditions d’acquisition, elle devrait être estimée à partir des images observées avec l’objet. Ce problème est mal posé, sous déterminé, et comme le processus de mesure est quasi-aléatoire dans la nature, nous le traitons en utilisant l’inter
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16

Mohiuddin, Yasneem Fatima. "Photocurrent imaging using a scanning laser microscope." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369094.

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17

Vieira, Pedro. "Tomographic imaging with a scanning laser ophthalmoscope." Thesis, University of Aberdeen, 1999. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602005.

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Retinal imaging with a confocal scanning laser Ophthalmoscope (cSLO) involves scanning a small laser beam over the retina and constructing an image from the reflected light. By applying the confocal principle, tomographic images can be produced by measuring a sequence of slices at different retinal depths. However, the thickness of such slices, when compared with the retinal thickness, is too large to give useful 3D retinal images, if no processing is done. In this work, a prototype cSLO was modified in terms hardware and software to give the ability of doing the tomographic measurements with
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18

Drake, Devin Robert. "Applications of laser scanning and imaging systems." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000526.

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19

Gattuso, Luca. "Monitoraggio di una frana tramite Laser Scanning." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2502/.

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20

Filbrandt, Philip W. M. "The characterisation of a scanning laser microscope." Thesis, University of Manchester, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.755293.

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21

Araújo, Adolfo Lino de. "Cadastro 3D no Brasil a apartir de varredura a laser (laser scanning)." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/162764.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2015.<br>Made available in DSpace on 2016-05-24T17:46:59Z (GMT). No. of bitstreams: 1 338191.pdf: 3929073 bytes, checksum: 3dc093aa57a147d2ce3d53161127f321 (MD5) Previous issue date: 2015<br>A complexidade e o alto adensamento das áreas urbanas têm contribuído para a ocupação cada vez mais verticalizada da superfície terrestre. Na medida em que novas construções sobre ou sob a superfície surgem, as estruturas dos sistemas cadastrais devem
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22

Araújo, Adolfo Lino de. "Cadastro 3D no Brasil a apartir de varredura a laser (laser scanning)." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/169583.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2015.<br>Made available in DSpace on 2016-10-19T13:12:37Z (GMT). No. of bitstreams: 1 338191.pdf: 3929073 bytes, checksum: 3dc093aa57a147d2ce3d53161127f321 (MD5) Previous issue date: 2015<br>A complexidade e o alto adensamento das áreas urbanas têm contribuído para a ocupação cada vez mais verticalizada da superfície terrestre. Na medida em que novas construções sobre ou sob a superfície surgem, as estruturas dos sistemas cadastrais devem acompanha-las.
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23

Dizorzi, Matúš. "Adaptivní plánování trajektorie průmyslového robotu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400667.

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This thesis deals with the extension of the RoScan scanning system features, making its behaviour more secure and adaptivte during scanning of the object on its whole trajectory. This work contains mathematical model of said manipulator, suggested methods to ensure proper behaviour during singularities. New features were added to the RoScan system such as control panel for manipulator control including new format of trajectory log, moving closer or further away from manipulator’s end effector and non adaptive trajectory testing for singularities. Result of this work is ready-to-use.
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24

Jones, Gary Lewis. "Dynamic scanning, a unique approach to product coding." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323631.

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25

Zator, Maria Malgorzata. "Membrane fouling characterization by confocal scanning laser microscopy." Doctoral thesis, Universitat Rovira i Virgili, 2009. http://hdl.handle.net/10803/8580.

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En sectores tan diversos como la industria alimentaria, la biotecnología y el tratamiento de aguas residuales, la filtración tangencial con membranas se viene utilizando de forma creciente en la separación, purificación y clarificación de distintas corrientes de proceso que contienen gran variedad de compuestos orgánicos. La limitación principal para el empleo industrial de las técnicas de separación por membranas es el ensuciamiento de éstas. El ensuciamiento se atribuye, de forma general, a la reducción en el diámetro de los poros, a su bloqueo y/o a la formación de un depósito en la super
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26

Holmgren, Johan. "Estimation of forest variables using airborne laser scanning /." Umeå : Dept. of Forest Resource Management and Geomatics, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s278.pdf.

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27

Xu, Zhiheng. "Tracking retinal motion with a scanning laser ophthalmoscope." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/20171.

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28

Martarelli, Milena. "Exploiting the laser scanning facility for vibration measurements." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248035.

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29

Shin, Dong-Ik. "Laser Scanning Imaging for Increased Depth-Of-Focus." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/44190.

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Throughout the decades, different techniques have been proposed to improve the depth-of-focus in optical microscopy. Common techniques like optical sectioning microscopy and scanning confocal microscopy have innate problems. By simply modifying the pupil function in microscope imaging system, we can also extend the depth-of-focus. The scanning system with a thin annular pupil has a high depth-of-focus and can scan the whole object, but the output light is too dim to be detected well by a photodetector. In this thesis, we propose a scanning technique employing an optical heterodyne scanning sy
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30

Manivannan, Ayyakkannu. "Digital fundus imaging with a scanning laser ophthalmoscope." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602038.

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A prototype scanning laser ophthalmoscope was constructed based on the original principles of Webb et al (1987 and 1990). The basic design was, however, altered in a number of ways to give the flexibility needed for what was primarily a research instrument with a requirement to use lasers of various wavelengths and to carry out confocal imaging with a variety of slice thicknesses. Some of the performance characteristics of the prototype SLO, such as modulation transfer function, axial resolution and uniformity of illumination were measured and are presented. The SLO can operate in three differ
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31

Boruah, Bosanta Ranjan. "Programmable diffractive optics for laser scanning confocal microscopy." Thesis, Imperial College London, 2007. http://hdl.handle.net/10044/1/11911.

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32

Wang, Chun-Ming Fraser Scott E. "Image enhancement with two-photon laser scanning microscopy /." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechETD:etd-01312008-153939.

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33

Scharf, Alexander. "Terrestrial Laser Scanning for Wooden Facade-system Inspection." Thesis, Luleå tekniska universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77159.

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The objective of this study was to evaluate the feasibility of measuring movement, deformation and displacement in wooden façade-systems by terrestrial laser scanning. An overview of different surveying techniques and methods has been created. Point cloud structure and processing was explained in detail as it is the foundation for understanding the advantages and disadvantages of laser scanning.    The boundaries of monitoring façades with simple and complex façade structures were tested with the phase-based laser scanner FARO Focus 3DS. In-field measurements of existing facades were done to s
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34

Lewark, Erick A. "Automated techniques in anthropometry using a three dimensional laser scanner." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176485676.

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35

Zogg, Hans Martin. "Investigations of high precision terrestrial laser scanning with emphasis on the development of a robust close-range 3D-laser scanning system /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18013.

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36

Liu, Junjie. "3D laser scanner development and analysis." Thesis, Aberystwyth University, 2013. http://hdl.handle.net/2160/b3a1beca-3d92-48bc-945e-2e50b3e7755a.

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This PhD project is a collaboration between Smart Light Devices, Ltd. in Aberdeen and Aberystwyth University on the development of such 3D laser scanners with an ultimate aim to inspect the underwater oil and gas pipes or structure. At the end of this project, a workable and full functional 3D laser scanner is to be developed. This PhD project puts a particular emphasis on the engineering and implementation of the scanner according to real applications’ requirements. Our 3D laser scanner is based on the principle of triangulation and its high accuracy over a short range scanning. Accurate 3D d
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37

Yildiz, Bilge Can. "Imaging Of Metal Surfaces Using Confocal Laser Scanning Microscopy." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613641/index.pdf.

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Optical imaging techniques have improved much over the last fifty years since the invention of the laser. With a high brightness source many imaging applications which were once inaccessible to researchers have now become a reality. Among these techniques, the most beneficial one is the use of lasers for both wide-field and confocal imaging systems. The aim of this study was to design a laser imaging system based on the concept of laser scanning confocal microscopy. Specifically the optical system was based on optical fibers allowing the user to image remote areas such as the inner surface of
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38

Abdelmajid, Yezeed. "Investigation and Comparison of 3D Laser Scanning Software Packages." Thesis, KTH, Geodesi och geoinformatik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102421.

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Laser scanning technologies has become an important tool in many engineering projects and applications. The output of laser measuring is the point cloud, which is processed in a way that makes it suitable for different applications. Processing of point cloud data is achieved through laser scanning software packages. Depending on the field of application, these packages have many different kinds of functions and methods that can be used. The main processing tasks used on a laser scanning software package include registration, modelling and texture mapping. Investigation and comparison of two la
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Luedtke, Michael A. Papazoglou Elisabeth S. "Wavelength effects on in vivo confocal scanning laser microscopy/." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/2518.

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40

Cobley, R. J. "Cross-sectional scanning tunnelling microscopy of biased laser structures." Thesis, Swansea University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636273.

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This work investigates Cross-Sectional Scanning Tunnelling Microscopy applied to semiconductor laser structures which are biased whilst they are being scanned. Images are presented as a function of sample bias. Increasing the sample bias removes the built-in band bending across the device and causes the horizontal topographic gradient of the scan to change. The p-type side of the sample is held at ground whilst the n-type side is biased. When tunnelling out of a double quantum well structure the topographic height of the n-type side increases by around 0.2nm at 1V. Tunnelling in to the structu
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41

Jiang, Shihong. "Non-scanning fluorescence confocal microscopy using laser speckle illumination." Thesis, University of Nottingham, 2005. http://eprints.nottingham.ac.uk/10139/.

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Confocal scanning microscopy (CSM) is a much used and advantageous form of microscopy. Although CSM is superior to conventional microscopy in many respects, a major disadvantage is the complexity of the scanning process and the sometimes long time to perform the scan. In this thesis a novel non-scanning fluorescence confocal microscopy is investigated. The method uses a random time-varying speckle pattern to illuminate the specimen, recording a large number of independent full-field frames without the need for a scanning system. The recorded frames are then processed in a suitable way to give
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Kucernak, Anthony Robert John. "Scanning laser photoelectrochemical studies of oxide films on metals." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305577.

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43

Evans, Hywel F. J. "Construction material classification using multi-spectral terrestrial laser scanning." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/33511/.

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This research addresses the problem of populating Building Information Model databases with information on building construction materials using a new classification method which uses multi-spectral laser scanning intensity and geometry data. Research in multi-spectral laser scanning will open up a new era in survey and mapping; the 3D surface spectral response sensitive to the transmitted wavelengths could be derived day or night in complex environments using a single sensor. At the start of this research a commercial multi-spectral sensor did not exist, but a few prototype level instruments
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Slaker, Brent. "Monitoring Underground Mine Displacement Using Photogrammetry and Laser Scanning." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51691.

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Photogrammetry and laser scanning are remote sensing technologies with the potential to monitor movements of rock masses and their support systems in underground mine environments. Displacements underground are traditionally measured through point measurement devices, such as extensometers. These are generally restricted to measuring one dimension, may change behavior with installation, may obstruct mining operations, and are restricted to monitoring the behavior of a small area. Photogrammetry and laser scanning offer the ability to monitor rock mass movements at millions of points in a lo
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Resop, Jonathan Patrick. "Terrestrial Laser Scanning for Quantifying Uncertainty in Fluvial Applications." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/38694.

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Stream morphology is an important aspect of many hydrological and ecological applications such as stream restoration design (SRD) and estimating sediment loads for total maximum daily load (TMDL) development. Surveying of stream morphology traditionally involves point measurement tools, such as total stations, or remote sensing technologies, such as aerial laser scanning (ALS), which have limitations in spatial resolution. Terrestrial laser scanning (TLS) can potentially offer improvements over other surveying methods by providing greater resolution and accuracy. The first two objectives were
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Slaker, Brent Allan. "Monitoring Underground Mine Displacement Using Photogrammetry and Laser Scanning." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51691.

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Photogrammetry and laser scanning are remote sensing technologies with the potential to monitor movements of rock masses and their support systems in underground mine environments. Displacements underground are traditionally measured through point measurement devices, such as extensometers. These are generally restricted to measuring one dimension, may change behavior with installation, may obstruct mining operations, and are restricted to monitoring the behavior of a small area. Photogrammetry and laser scanning offer the ability to monitor rock mass movements at millions of points in a lo
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47

Alkayal, Adam. "Laser scanning of overbreak anddeformation for crosscuts at Malmbergetmine." Thesis, Luleå tekniska universitet, Geoteknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81375.

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Nowadays, new measurement technologies are being used in underground mining operationsto increase the safety factors and solve several mining challenges to save time and improve theeffectiveness of mining operations. One of the new tools is the uGPS Rapid Mapper, which hasrecently entered the market. LKAB is one of the companies looking to use modern technologyto help solve problems in its Kiirunavaara and Malmberget underground mines. The operatingmechanism of the uGPS Rapid Mapper was studied and some investigations were carried outwith the device.The first part of this thesis studied the re
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48

Antoine, Marc M. E. "A rapidly scanning three-velocity-component laser Doppler anemometer." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104288.

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49

Alshawabkeh, Yahya. "Integration of laser scanning and photogrammetry for heritage documentation." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-28994.

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50

Reshetyuk, Yuriy. "Self-calibration and direct georeferencing in terrestrial laser scanning." Doctoral thesis, Stockholm : Arkitektur och samhällsbyggnad, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9879.

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