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Dissertations / Theses on the topic 'Metallic medium'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Carsbring, Amanda. "Heat Treatment and Secondary Phase Formation in FeCrNi Medium Entropy Alloys." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291251.

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The topics of high entropy alloys (HEA) and medium entropy alloys (MEA) have been heavily researched in recent years. A HEA usually consists of five or more base elements, and a MEA would have three or four base elements. These types of alloys are multi-principal element alloys (MPEA) that have been thought to have interesting properties due to their high configurational entropy, which was thought to be the reason for stabilized simple solid solution phase in the HEA. The high entropy effect contributing to stable single phase in these alloys has been discussed and has not been found to be a p

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2

Howe, Christopher J. "Medium-energy ions scattering studies of ultrathin metallic films on the face-centred cubic (111) surface." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/35637.

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An experimental investigation of ultrathin metallic films on face centred cubic(111) surfaces using medium energy ion scattering as a primary experimental technique is reported. A suite of custom software written for data-processing, calibration and analysis has also been described. The specific experimental systems investigated are 0.25 ML to 3.89 ML of palladium on copper(111) and 0.23 ML to 3.74 ML of silver on aluminium(111). The Pd CU(111) system was shown to exhibit 42% twinning at 0.25 ML through 4.74 ML. At 0.25 ML coverage it has been shown that the Pd migrates into the top three laye

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3

Vernon, Kristy C. "Strongly localised plasmons in metallic nanostructures." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/19318/2/Kristy_Vernon_Citation.pdf.

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Strongly localised plasmons in metallic nano-structures offer exciting characteristics for guiding and focusing light on the nano-scale, opening the way for the development of new types of sensors, circuitry and improved resolution of optical microscopy. The work presented in this thesis focuses on two major areas of plasmonics research - nano-focusing structures and nano-sized waveguides. Nano-focusing structures focus light to an area smaller than the wavelength and will find applications in sensing, efficiently coupling light to nano-scale devices, as well as improving the resolution of nea

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4

Vernon, Kristy C. "Strongly localised plasmons in metallic nanostructures." Queensland University of Technology, 2008. http://eprints.qut.edu.au/19318/.

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Strongly localised plasmons in metallic nano-structures offer exciting characteristics for guiding and focusing light on the nano-scale, opening the way for the development of new types of sensors, circuitry and improved resolution of optical microscopy. The work presented in this thesis focuses on two major areas of plasmonics research - nano-focusing structures and nano-sized waveguides. Nano-focusing structures focus light to an area smaller than the wavelength and will find applications in sensing, efficiently coupling light to nano-scale devices, as well as improving the resolution of nea

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5

Zhao, Sicheng. "Interactive dynamics of fluid flow and metallic alloys solidification." Thesis, Aix-Marseille 3, 2011. http://www.theses.fr/2011AIX30010.

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Nous avons étudié les phénomènes convectifs et leur interaction dynamique avec la formation des microstructures pendant la solidification dirigée d’alliages étalliquesbinaires.La méthode post-mortem a été utilisée d’abord pour étudier la Transition olonnaire-Equiaxe pendant la solidification dirigée d’échantillons cylindriques d’Al-3,5wt%Ni non affiné sous la Technique de Rotation Accélérée de Creuset. La simulation numérique a été éffectuée et acquérie les résultats en concordance avec les manipulations.La technique in-situ a été appliquée pour comprendre l’évolution en fonction de temps des

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6

Espinoza-Camino, P., I. Macassi-Jaurequi, C. Raymundo-Ibañez, and F. Dominguez. "Warehouse management model using FEFO, 5s, and chaotic storage to improve product loading times in small- and medium-sized non-metallic mining companies." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/656393.

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This article addresses one of the main problems faced by small- and medium-sized business in the non-metallic mining sector in Peru. These companies own warehouses and face the major problem of failing to deliver orders correctly and in a timely manner. This problem usually occurs when the business grows from a small- to medium-sized company in a short span of time; this situation leads to new processes within warehouses that are mostly not standardized. Besides, facilities are no longer optimal in space and the workers are not properly trained. The case study shows that the orders were not de

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7

Lecoq, Marie. "Étude du colmatage de filtres métalliques par un aérosol liquide." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0006.

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Le confinement des installations industrielles susceptibles de contenir des matières dangereuses est assuré en grande partie par des filtres à très haute efficacité (THE) intégrés dans les réseaux de ventilation. Dans les procédés, mis en œuvre dans l'industrie nucléaire, certains scénarios accidentels peuvent conduire au dégagement de liquide sous forme de gouttelettes en suspension (aérosol liquide). Dans ce cas de figure, leur présence peut affecter les performances des filtres THE en engendrant une élévation rapide et importante de leur perte de charge pouvant conduire à une diminution not

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8

Deng, Xiaodong. "Nondestructive evaluation of thermal sprayed coating by acoustic microscopy and Eddy current testing." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0030/document.

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La thèse a mis en œuvre deux méthodes inverses pour l’évaluation non destructive d’un milieu multicouche anisotrope : la microscopie acoustique et les courants de Foucault. Pour la microscopie acoustique, nous avons adapté un modèle de propagation de l'onde acoustique dans un milieu multicouche, en calculant les coefficients de réflexion et de transmission d’un revêtement multicouche sur un substrat et en modélisant la réponse acoustique V(z) propre à la microscopie acoustique. Une méthode inverse utilisant l’algorithme de Levenberg-Marquardt donne accès à l’épaisseur, au module de Young et à

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9

Al, Husseny Adel Ahmed Niameh Mehdy. "Heat transfer enhancement using rotating metallic porous media." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/heat-transfer-enhancement-using-rotating-metallic-porous-media(1a50759b-fd87-4836-b7ab-5fa0ab6d6c5d).html.

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The present research is dedicated to numerically optimise the heat transfer enhancement achieved by means of utilising rotating metallic porous media. Three systems that play a crucial role in power generation systems are examined. The first is the cooling passages used to dissipate the heat generated within the rotor conductors in electrical generators, the second is the double pipe-heat exchanger, and the last is the rotary thermal regenerator. In all of the systems under consideration, the main objective is to improve the overall performance achieved and to determine the optimum values of t

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10

Mansour, Yehia. "Études théorique et expérimentale de la formation des nanoparticules métalliques par ablation laser en milieu liquide. Modélisations des propriétés optiques et thermiques de l'interaction Laser-Nanoparticules." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0283.

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Les nanoparticules (NPs) de métaux nobles sont le siège d’un phénomène de résonance plasmon de surface résultant de l’oscillation collective de leurs électrons de conduction sous l’effet d’une onde électromagnétique. Dans le cas de NPs d’or et l’argent, la fréquence de résonance est située dans visible ce qui confère à ces NPs plasmoniques des propriétés optiques uniques. En particulier, la position et l’intensité de la bande de résonance plasmon peuvent varier en fonction de leur taille, leur forme (rapport d'aspect) et de l'indice du milieu hôte. Les possibilités d’applications nécessitent d

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11

Lappas, Ingo. "Heterogene Katalyse in überkritischen Medien Charakterisierung von Metall- und Legierungskatalysatoren /." [S.l. : s.n.], 2001. http://elib.tu-darmstadt.de/diss/000179.

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12

Behra, Philippe. "Etude du comportement d'un micropolluant metallique (le mercure) au cours de sa migration a travers un milieu poreux sature : identification experimentale des mecanismes d'echanges et modelisation des phenomenes." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13120.

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13

AL-Ghezi, Hammid. "Optical Propagation in Anisotropic Metamaterials: Application to Analysis and Design of Metallo-Dielectric Filters." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1628263495632462.

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14

Hübschen, Bettina. "Grundlagenuntersuchungen zur Tiefenfiltration von Metallen /." Aachen : Shaker, 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=013109603&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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15

Klement, Kai. "Nichtgleichgewichtsdefekte in extrem verformten Metallen /." Göttingen : Sierke, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016072212&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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16

SANNA, ALESSANDRO. "Studio di un modello di correlazione tra la fluttuazione del tenore di metalli pesanti e di altri fattori ambientali e la salute umana in Sardegna." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266896.

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Since the first half of the 20th century, the incidence of Multiple Sclerosis (MS), Type 1 Diabetes (T1D) and Autism Spectrum Disorders (ASDs) has increased in Sardinia. T1D results from autoimmune destruction of insulin, producing beta cells of the pancreas; MS is a chronic disease of the central nervous system, causing neurological affliction; Autism is defined as a complex developmental disability that generally appears during the first three years of life. Concerning MS and T1D, Sardinia island has one of the highest incidence rate in the world. In this island, there is the presence o

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17

Metreveli, George [Verfasser], and F. [Akademischer Betreuer] Himmel. "Kolloidale Wechselwirkungen und kolloidgetragener Transport von Metall(oid)en in porösen Medien / George Metreveli. Betreuer: F. Himmel." Karlsruhe : KIT-Bibliothek, 2008. http://d-nb.info/101369628X/34.

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18

Ievsieieva, Ievgeniia. "Simulação com o código GEANT4 de medida de espessura de revestimento metálico em metal por XRF." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=4154.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Nesta dissertação são apresentados resultados de simulações Monte Carlo de fluorescência de raios X (XRF), utilizando o programa GEANT4, para medidas de espessura de revestimento metálico (Ni e Zn) em base metálica (Fe). As simulações foram feitas para dois tamanhos de espessura para cada metal de revestimento, (5μm e 10μm), com passos de 0,1 μm e 0,001 μm e com 106 histórias. No cálculo da espessura do revestimento foram feitas as aproximações de feixe de raios X monoenegético, com a análise da transmissão ap

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19

Klages, Kilian. "Laserstrahl-Mikroschweissen ungleicher Metalle durch Nahtschweissen mit gepulsten Nd:YAG-Lasern /." Aachen : Shaker, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016030450&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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20

Thielecke, Frank. "Parameteridentifizierung von Simulationsmodellen für das viskoplastische Verhalten von Metallen : Theorie, Numerik, Anwendung /." Braunschweig : Mechanik-Zentrum, 1998. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015613208&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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21

Ma, Anxin. "Modeling the constitutive behavior of polycrystalline metals based on dislocation mechanisms /." Aachen : Shaker, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014901396&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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22

Näslund, Jan. "Solvated trivalent metal ions in solution : a coordination chemistry study /." Uppsala : Swedish University of Agricultural Sciences, 2000. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009419319&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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23

Mandt, Dietmar. "Eigenschaften und Einsatzverhalten von leichten und dämpfenden Werkstoffverbund-Zahnrädern /." Aachen : Shaker, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014919182&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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24

Hiess, Arno. "Untersuchungen zur Konkurrenz der magnetischen Wechselwirkungen in elektronisch hochkorrelierten Metallen : Neutronenstreuung - magnetische Röntgendiffraktion Mössbauer-Spektroskopie - Magnetisierungsexperimente /." Aachen : Shaker, 1997. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=007536200&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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25

Fuhrmann, Tino Hahn Ortwin. "Zur Berechnung von Klebverbindungen in Fahrzeugstrukturen aus Faser-Kunststoff-Verbunden und Metallen mit Hilfe der Finiten Elemente Methode /." Aachen : Shaker, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016685468&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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26

Richter, Karsten. "Untersuchungen zum Einsatz von frei modulierbaren gepulsten Nd:YAG-Laserstrahlquellen für das Schweissen von Refraktärmetallen /." Aachen : Shaker, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016151308&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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27

Willach, Jens. "Herstellung von konturierten Bohrungen in Mehrschichtsystemen mit Nd:YAG-Laserstrahlung /." Aachen : Shaker, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014833932&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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28

Geldern, Maike van. "Herstellung von hochschmelzenden Metallmatrix-Verbundwerkstoffen durch Schleudergiessen /." Aachen : Shaker, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014709815&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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29

Terçariol, Walter Luis 1975. "Contribuição ao projeto de circuitos integrados de reguladores de tensão com charge pump em tecnologia CMOS : aceleração do tempo de partida, redução do ripple, redução do efeito kick-back e técnica indireta de medida da tensão de saída." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260876.

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Orientador: José Antonio Siqueira Dias<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-26T13:53:46Z (GMT). No. of bitstreams: 1 Tercariol_WalterLuis_D.pdf: 1322557 bytes, checksum: 4f45518a1a62907cd9a61afa627408c3 (MD5) Previous issue date: 2014<br>Resumo: Este trabalho visa compilar três contribuições na melhoria dos projetos de reguladores de tensão com unidades de bombeamento de carga embutidos (células elevadoras de tensão Dickson - BC). A primeira aborda uma técnica inovadora de arranque na

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30

Yeh, Chih-Ting, and 葉致廷. "Experimental Study of Free Convection Heat Transfer in the Metallic Porous Medium Heat Sink for LED Lamp." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/78460533427921265582.

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碩士<br>建國科技大學<br>機械工程系暨製造科技研究所<br>100<br>This study experimentally investigated the free convective heat transfer characteristics of annular and fin shaped metal foam heat sinks applied to the cooling of LEDs. The basic body of the heat sink made of aluminum alloy was an annular cup with/without radially fins, and had 76 mm in diameter, 14.6mm in height and 3mm in thickness. The annular metal foam heat sink was to cover the annular 0.97-porosity copper foam layer onto the external surface of the annular cup; while the fin shaped metal foam heat sink was to attach the 0.97-porosity cooper foam p

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31

Zhen, Yurong. "Plasmonic properties and applications of metallic nanostructures." Thesis, 2013. http://hdl.handle.net/1911/72071.

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Plasmonic properties and the related novel applications are studied on various types of metallic nano-structures in one, two, or three dimensions. For 1D nanostructure, the motion of free electrons in a metal-film with nanoscale thickness is confined in its normal dimension and free in the other two. Describing the free-electron motion at metal-dielectric surfaces, surface plasmon polariton (SPP) is an elementary excitation of such motions and is well known. When further perforated with periodic array of holes, periodicity will introduce degeneracy, incur energy-level splitting, and facilitate

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32

Power, Sean Michael. "An appraisal of homoeopathic quinquagenimillesimal potencies of plumbum metallicum and stannum metallicum by means of nuclear magnetic resonance spectroscopy." Thesis, 1999. http://hdl.handle.net/10321/2697.

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Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Homoeopathy, Technikon Natal, 1999.<br>The purpose of this study was to investigate the Nuclear Magnetic Resonance spectra of samples of LM6; LM14 and LM22 homoeopathic quinquagenimillesimal (LM) potencies of tin (Stannum metallicum), lead (Plumbum metallicum) and two lactose based controls: one control which is prepared by the means of potentisation and one control prepared without the means of potentisation. It was hypothesised that in terms of the effect of different substances (Stannu

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33

Lappas, Ingo [Verfasser]. "Heterogene Katalyse in überkritischen Medien : Charakterisierung von Metall- und Legierungskatalysatoren / vorgelegt von Ingo Lappas." 2001. http://d-nb.info/963635239/34.

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34

Gioka, Christiana. "Characterization of substances released from polymeric and metallic orthodontic materials and assessment of their biological properties /." 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=013070147&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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35

Vaithilingam, Vimlen. "The effectiveness of a homoeopathic complex (Germanium metallicum 30CH, Nux vomica 12CH, Kalium phosphoricum 6CH, Picricum acidum 6CH) in the treatment of job burnout in the human services field." Thesis, 2008. http://hdl.handle.net/10321/464.

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Dissertation submitted in partial compliance with the requirements of the Master’s Degree in Technology: Homoeopathy, in the Faculty of Health Sciences at the Durban University of Technology, 2008.<br>The purpose of this double blind placebo-controlled study was to evaluate the efficacy of a homoeopathic complex (Germanium metallicum 30CH, Nux vomica 12CH, Kalium phosphoricum 6CH, Picricum acidum 6CH) in the treatment of job burnout in the human services field. In total 30 participants were chosen according to specific inclusion and exclusion criteria. The sample group was then randomly divide

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36

Messner, Gregor Franz Ludwig. "Modeling metal cutting processes under consideration of elastic material properties /." 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016247070&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Damerau, Georg. "Werkstoffwissenschaftliche Untersuchung eines experimentellen Verfahrens zur Herstellung eines Verbundes zwischen Metall und Verblendkunststoff /." 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014710821&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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38

Füngling, Georg. "Der Einfluss der Oberflächenkonditionierung auf den Metall-Keramik-Haftverbund von CAD-CAM-gefertigten Restaurationen /." 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014282972&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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