Dissertations / Theses on the topic 'Hand file'
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Sattapan, Boonrat. "Dynamic properties of nickel-titanium instruments." Connect to thesis, 1997. http://repository.unimelb.edu.au/10187/2437.
Full textIglecias, Elaine Faga. "Comparação entre a capacidade de desobturação de canais radiculares obturados com cimentos à base de MTA, polímero da mamona e resina epóxica utilizando instrumento manual ou rotatório/." São José dos Campos : [s.n.], 2008. http://hdl.handle.net/11449/90377.
Full textBanca: Cláudio Antonio Talge Carvalho
Banca: Marcia Carneiro Valera
Banca: Celso Kenji Nishiyama
Resumo: Em alguns casos, o fracasso do tratamento endodôntico indica a necessidade de um retratamento do canal radicular, que pode ser realizado com diversas técnicas, auxiliadas ou não por solvente. O objetivo deste estudo foi comparar a qualidade e o tempo necessário para desobturação de canais obturados com cimento à base de resina epóxica (AH Plus), cimento experimental à base de MTA e cimento experimental à base de Mamona utilizando-se limas manuais Hedströem e limas rotatórias ProTaper® Retratamento, com ou sem solvente (eucaliptol). 120 raízes de dentes uniradiculares humanos foram instrumentadas e então divididas em 3 grupos de acordo com o cimento utilizado, sendo em seguida radiografadas no sentido mésio-distal e vestíbulo-lingual, com auxílio de uma matriz de silicona. Cada grupo inicial foi subdividido de acordo com a técnica: desobturação manual com ou sem solvente e desobturação rotatória com ou sem solvente, formando um total de 12 grupos com 10 dentes cada. Ao final, os espécimes foram novamente radiografados e alguns espécimes, em caráter ilustrativo, diafanizados. As radiografias iniciais e finais foram digitalizadas e as mesmas foram medidas pelo programa Image Tools comparando os volumes de obturação inicial e remanescente. Os resultados médios obtidos em porcentagem do volume de material obturador remanescente em ordem decrescente foram: AH Plus/rotatório/solvente (39.84) > AH Plus/rotatório (29.85) > AH Plus/manual/solvente (22.37) > mamona/manual (17.17) > mamona/manual/solvente (16.15) > AH Plus/manual (15.89) > MTA/manual (14.12) > MTA/rotatório/solvente (9.71) > MTA/manual/solvente (9.17) > mamona/rotatório/solvente (5.53) > mamona/rotatório (5.14) > MTA/rotatório (2.7). Com relação ao tempo de desobturação os resultados médios em segundos, em ordem decrescente foram: mamona/rotatório/solvente (171.4) > mamona/rotatório (202.0) > MTA... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Convencional endodontic retreatment has largely used for the management of failed root canal treatment. The objective of the present study was to evaluate the effectiveness and the time necessary of hand (hedströem file)and rotary (Pro Taper® retreatment) instrumentation for removal of filling material from root canals. 120 extracted uniradicular teeth were selected. The teeth were root filled using thermomechanical compactation of gutta-percha and sealer: MTA-based sealer, polymer castor oil-based sealer or AH Plus. After 7 days, the roots were randomized in groups and the filling material was removed using the following techniques: hand instrumentation with or without eucalyptol and rotary instrumentation with and without eucalyptol . Radiographs were taken in buccolingual and mesiodistal direction. The images were scanned and digitized. The total area of the canal and the area with remaining obturation material were measured in millimeters using computed image analysis system (Image Tool for Windows). Comparisons of the percentages of remaining filling material in the root canal reveal the AH Plus/rotary instrumentation group resulted in a bigger percentage of canal area covered by residual filling material, with a significant difference statistics. The use of eucalyptol not reveals any significant differences between the methods of removal. The bigger time of retreatment were groups polymer castor oil/hand instrumentation with or without eucalyptol. All instruments left remnants of filling material on the root canal walls irrespective of the root filling material used.
Mestre
Iglecias, Elaine Faga [UNESP]. "Comparação entre a capacidade de desobturação de canais radiculares obturados com cimentos à base de MTA, polímero da mamona e resina epóxica utilizando instrumento manual ou rotatório." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/90377.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Em alguns casos, o fracasso do tratamento endodôntico indica a necessidade de um retratamento do canal radicular, que pode ser realizado com diversas técnicas, auxiliadas ou não por solvente. O objetivo deste estudo foi comparar a qualidade e o tempo necessário para desobturação de canais obturados com cimento à base de resina epóxica (AH Plus), cimento experimental à base de MTA e cimento experimental à base de Mamona utilizando-se limas manuais Hedströem e limas rotatórias ProTaper® Retratamento, com ou sem solvente (eucaliptol). 120 raízes de dentes uniradiculares humanos foram instrumentadas e então divididas em 3 grupos de acordo com o cimento utilizado, sendo em seguida radiografadas no sentido mésio-distal e vestíbulo-lingual, com auxílio de uma matriz de silicona. Cada grupo inicial foi subdividido de acordo com a técnica: desobturação manual com ou sem solvente e desobturação rotatória com ou sem solvente, formando um total de 12 grupos com 10 dentes cada. Ao final, os espécimes foram novamente radiografados e alguns espécimes, em caráter ilustrativo, diafanizados. As radiografias iniciais e finais foram digitalizadas e as mesmas foram medidas pelo programa Image Tools comparando os volumes de obturação inicial e remanescente. Os resultados médios obtidos em porcentagem do volume de material obturador remanescente em ordem decrescente foram: AH Plus/rotatório/solvente (39.84) > AH Plus/rotatório (29.85) > AH Plus/manual/solvente (22.37) > mamona/manual (17.17) > mamona/manual/solvente (16.15) > AH Plus/manual (15.89) > MTA/manual (14.12) > MTA/rotatório/solvente (9.71) > MTA/manual/solvente (9.17) > mamona/rotatório/solvente (5.53) > mamona/rotatório (5.14) > MTA/rotatório (2.7). Com relação ao tempo de desobturação os resultados médios em segundos, em ordem decrescente foram: mamona/rotatório/solvente (171.4) > mamona/rotatório (202.0) > MTA...
Convencional endodontic retreatment has largely used for the management of failed root canal treatment. The objective of the present study was to evaluate the effectiveness and the time necessary of hand (hedströem file)and rotary (Pro Taper® retreatment) instrumentation for removal of filling material from root canals. 120 extracted uniradicular teeth were selected. The teeth were root filled using thermomechanical compactation of gutta-percha and sealer: MTA-based sealer, polymer castor oil-based sealer or AH Plus. After 7 days, the roots were randomized in groups and the filling material was removed using the following techniques: hand instrumentation with or without eucalyptol and rotary instrumentation with and without eucalyptol . Radiographs were taken in buccolingual and mesiodistal direction. The images were scanned and digitized. The total area of the canal and the area with remaining obturation material were measured in millimeters using computed image analysis system (Image Tool for Windows). Comparisons of the percentages of remaining filling material in the root canal reveal the AH Plus/rotary instrumentation group resulted in a bigger percentage of canal area covered by residual filling material, with a significant difference statistics. The use of eucalyptol not reveals any significant differences between the methods of removal. The bigger time of retreatment were groups polymer castor oil/hand instrumentation with or without eucalyptol. All instruments left remnants of filling material on the root canal walls irrespective of the root filling material used.
Žampachová, Lenka. "Hand-made film." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2010. http://www.nusl.cz/ntk/nusl-232283.
Full textWard, Julie Anne. "The Mistress." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276717955.
Full textLass, Barbara Frances. "Hans Richter : film artist /." Access Digital Full Text version, 1987. http://pocketknowledge.tc.columbia.edu/home.php/bybib/10778974.
Full textYaeger, Matthew. "Hands On Painting." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3823.
Full textCotton, Darryl Paul James. "Thick-film piezoelectric slip sensors for a prosthetic hand." Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444223.
Full textGentilcore, Dominic M. "Response of Pinyon-juniper woodlands to fire, chaining, and hand thinning." Thesis, University of Nevada, Reno, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1591350.
Full textPinyon-juniper (Pinus monophylla – Juniperus osteosperma) woodlands have expanded and infilled over the last 150 years to cover more than 40 million ha in the Great Basin. Many land managers seek to remove Pinyon-juniper trees using a variety of treatments. This thesis looks at six different Pinyon-juniper removal projects in Central and Eastern Nevada. We established a total of 73 vegetation and soil monitoring plots (38 treated, 35 adjacent untreated) across six Pinyon-juniper removal projects in Central and Eastern Nevada to look at the effects of fire, hand thinning, and chaining. The four burns examined together in Chapter 1 had similar elevation, precipitation, and pre-treatment vegetation communities in the untreated areas, but the treated areas had significantly different responses to treatment. With nonmetric multidimensional scaling (NMS), we found a useful 3-axis ordination of the plots (stress=7.1, R2=.966). Within ordination space, the treated plots were well grouped by parent material. These results informed a Poisson generalized linear model that found parent material factorized explained 86.5% of the deviance in cheatgrass (Bromus tectorum) cover at the treated plots. The projects on soils derived from welded tuff had very little cheatgrass while soils derived from limestone or mixed limestone/volcanics were dominated by cheatgrass. Parent material should be considered an important factor when planning Pinyon-juniper removal treatments. Chapter 2 examined the effects of a hand thinning. The hand thinning significantly reduced tree cover [F(1,10) = 7.43, p = 0.027] to less than 2%. Perennial grasses on the site are slightly higher in the treated area. There was a significant increase in perennial grass cover from 2013 to 2014 [F(1,10) = 14.5, p = 0.003]. The hand thinning did not have significant effects on shrubs, annual grasses, annual forbs, perennial forbs, ground cover, stability, species richness, diversity, infiltration, or gap structure. Because hand thinning does not remove the shrubs or other perennials, site resistance can be maintained. With sufficient understory vegetation to maintain resistance post treatment (as in phase I or early phase II Pinyon-juniper woodlands), nonnative annual grasses are less likely to dominate after treatment. Chapter 3 examined the effects of a chaining. The effects of the 40-year old chaining are still significant even though Pinyon-juniper trees are reinvading and make up >5% of the cover in the treated area. The treated areas still have a much more productive understory than adjacent untreated areas. Perennial grass cover, frequency, and density was 2-5 times greater in the chained area. The treated area had fewer large gaps (>100 cm). However, interspace infiltration times were slower in the treatment (t(4)=-2.14, p=0.09). Surface and subsurface soil aggregate stability remained significantly lower in the treatment for vegetation-protected and unprotected samples (t(4)=3.53, p=0.024; t(4)=3.10, p=0.036). Chainings have long-term benefits for vegetation, but also long term impacts on soils and hydrologic ecosystem processes. When planning Pinyon-juniper removal treatments, land managers should consider the plant community, temperature and precipitation regime, and soils at the potential treatment location to better achieve desired outcomes.
Yao, Weijie. "Fine-Grained Hand Pose Estimation System based on Channel State Information." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1593211557742674.
Full textBond, Louis A. "Teachin' The Hard Way." Digital Commons at Loyola Marymount University and Loyola Law School, 1992. https://digitalcommons.lmu.edu/etd/620.
Full textWelyhorsky, Maxwell Joseph. "Neuro-Fuzzy Grasp Control for a Teleoperated Five Finger Anthropomorphic Robotic Hand." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42563.
Full textBuchanan, Glynn Dale. "Decontamination and use of endodontic hand files in dental practice in Pretoria." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/65863.
Full textDissertation (MSc)--University of Pretoria, 2017.
Odontology
MSc
Unrestricted
Blümlinger, Christa. "Kino aus zweiter Hand zur Ästhetik materieller Aneignung im Film und in der Medienkunst." Berlin Vorwerk 8, 2009. http://d-nb.info/988749343/04.
Full textJespersen, Andrea. "Mind Circles : on conceptual deliberation : Hanne Darboven and the trace of the artist's hand." Thesis, Northumbria University, 2015. http://nrl.northumbria.ac.uk/27631/.
Full textHansen, Rickard. "Design fires in underground hard rock mines." Licentiate thesis, Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-11297.
Full textGRUVAN
Cremer, Lisa. "Ein Entscheidungsmodell zur Einführung von NFC-basierten Mobile-Payment-Verfahren." St. Gallen, 2007. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/04607990001/$FILE/04607990001.pdf.
Full textJones, Matthew. "Becoming 'film noir' : film noir adaptions of hard-boiled fiction, 1944-46." Thesis, University of Wales Trinity Saint David, 2018. http://repository.uwtsd.ac.uk/900/.
Full textRobertson, Ashleigh. "My Journey Home: A Study in Hand-Felted Wool." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etd/2150.
Full textMesch, Emma. "I Huvudet på Pedro Almodovar : - Karaktäristiska drag som format hans filmskapande." Thesis, Växjö University, School of Humanities, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1263.
Full textHeger, Christian. "Die rechte und die linke Hand der Parodie : Bud Spencer, Terence Hill und ihre Filme /." Marburg : Schüren Verlag, 2009. http://www.schueren-verlag.de/?aid=2383.
Full textHeger, Christian. "Die rechte und die linke Hand der Parodie Bud Spencer, Terence Hill und ihre Filme." Marburg Schüren, 2005. http://d-nb.info/991498909/04.
Full textPowers, Samantha N., and Lauren K. Gust. "A novel video game peripheral for detecting fine hand motion and providing haptic feedback." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74910.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 51-53).
This thesis documents the design and implementation of a game controller glove that employs optical tracking technology to detect movement of the hand and fingers. The vision algorithm captures an image from a webcam in real-time and determines the centroids of colored sections on a glove worn by the player; assigning a distinctive identifier for each section which is associated with a 3D model retrieved from a preexisting library. A Vivitouch artificial muscle module is also mounted to the top of the glove to provide vibratory haptic feedback to the user. The system has been user tested and a number of potential use scenarios have been conceived for integration of the controller in various gaming applications.
by Samantha N. Powers and Lauren K. Gust.
S.B.
Liu, Shiyu. "Deformation and fracture of fine-grained CrAISiN hard coatings." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708634.
Full textTorrescano, Alvarez Jeanette. "Hard anodic films for aluminium alloys." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/hard-anodic-films-for-aluminium-alloys(70029c32-b09f-452d-ba17-223facc3ee12).html.
Full textDe, Villiers Jacques. "Between the norm and a hard place: representing marginality in Harmony Korine's Gummo." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/14087.
Full textHeberling, Rachel Elaine. "Obsolete Communication: An Apparition of the Disembodied Hand and Voice." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306854239.
Full textBui, Thi Hanh [Verfasser]. "The excitonic fine structure of colloidal nanocrystals / Thi Hanh Bui." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2020. http://d-nb.info/123055517X/34.
Full textJaeggle, Philipp. "Vereinfachung von Produkten und Produktangeboten als Marketing-Trend." St. Gallen, 2006. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/01651322002/$FILE/01651322002.pdf.
Full textYeung, Priscilla. "A quantitative comparison of the fill density of MTA produced by two different placement techniques." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/886.
Full textHall, Sheldon Tait. "Hard ticket giants : Hollywood blockbusters in the widescreen era." Thesis, University of East Anglia, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323254.
Full textCerruti, Giulio. "Design and Control of a Dexterous Anthropomorphic Robotic Hand." Thesis, Ecole centrale de Nantes, 2016. http://www.theses.fr/2016ECDN0009/document.
Full textThis thesis presents the design and control of a low-cost and lightweight robotic hand for a social humanoid robot. The hand is designed to perform expressive hand gestures and to grasp small and light objects. Its geometry follows anthropometric data. Its kinematics simplifies the human hand structure to reduce the number of actuators while ensuring functional requirements. The hand preserves anthropomorphism by properly placing five fingers on the palm and by ensuring an equilibrated thumb opposability. Its mechanical system results from the compromise between fully-coupled phalanges and self-adaptable fingers in a unique hybrid design. This answers the need for known finger postures while gesturing and for finger adaptation to different object shapes while grasping. The design is based on two distinct actuation systems embodied in parallel within the palm and the fingers. Their coexistence is ensured by a compliant transmission based on elastomer bars. The proposed solution significantly reduces the weightand the size of the hand by using seven low-power actuators for gesturing and a single high-power motor for grasping. The overall system is conceived to be embedded on Romeo, a humanoid robot 1.4 [m] tall produced by Aldebaran. Actuation systems are dimensioned to open and close the fingers in less than1 [s] and to grasp a full soda can. The hand is realized and controlled to ensure safe human-robot interaction and to preserve mechanical integrity. A prototype(ALPHA) is realized to validate the design feasibility and its functional capabilities
Longela, Makusudi Simon. "The development of an artificial hand using nickel-titanium as actuators." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/2229.
Full textThis thesis outlines a proposed mechanical design, prototyping and testing of a five fingered artificial hand made of 15 articulated joints actuated by Shape Memory Alloys (SMAs) mimicking muscular functions. SMAs Artificial muscles were incorporated in the forearm and artificial tendons made of nylon wires passing through a hollow palm transmit the pulling force to bend the fingers. Torsion springs set in each joint of the fingers create enough restoring force to straighten the finger when the actuators are disengaged. Nickel-Titanium (NiTi) wires were intrinsically embedded within the hand structure allowing significant movements mimicking human hand-like gestures. A control box made of switches connected to the artificial hand helps to control each gesture. A modular approach was taken in the design to facilitate the manufacture and assembly processes. Nickel-Titanium wires were used as actuators to perform the artificial muscle functions by changing their crystallographic structures due to Joule's heating. Rapid prototyping techniques were employed to manufacture the hand in ABS plastic.
Matthes, Patrick. "Magnetic and Magneto-Transport Properties of Hard Magnetic Thin Film Systems." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2015. https://monarch.qucosa.de/id/qucosa%3A20376.
Full textDie vorliegende Dissertation beschäftigt sich mit der Untersuchung ferromagnetischer Dünnschichtsysteme im Hinblick auf die Austauchkopplung, das Ummagnetisierungsverhalten und Effekte wie z.B. den Exchange Bias Effekt oder den Riesenmagnetwiderstandseffekt (GMR), welche in derartigen Heterostrukturen auftreten können. Die Probenpräparation erfolgte mittels DC Magnetronsputtern, wobei auf einkristallinen aber auch flexiblen sowie starren amorphen Substraten abgeschieden wurde. Im ersten Teil der Arbeit werden Untersuchungen mit dem Hintergrund einer Anwendung als magnetischer Datenträger vorgestellt. Konkret werden hier die Konzepte Bit Patterned Media (BPM) und 3D Speicher miteinander kombiniert. Letzteres Konzept basiert auf der Verwendung wenigstens zweier austauschentkoppelter ferromagnetischer Schichten, für welche [Co/Pt] Multilagen mit unterschiedlicher magnetischer Anisotropie verwendet wurden. Als Zwischenschichtmaterial diente Pt und Ru. Durch die Charakterisierung des Ummagnetisierungsverhaltens wurde die Austauschkopplung in Abhängigkeit der Zwischenschichtdicke untersucht. Darüber hinaus wurden jene Schichtstapel zur Realisierung des BPM-Konzeptes auf selbstangeordnete SiO2 Partikel mit unterschiedlichen Durchmessern aufgebracht, durch welche sich lateral austauschentkoppelte, eindomänige magnetische Nanostrukturen erzeugen lassen. Zur Untersuchung des Ummagnetisierungsverhaltens und der jeweiligen Größenabhängigkeiten (maßgeblich Durchmesser und Schichtdicke) wurden diese mittels Magnetkraftmikroskopie sowie winkelabhängiger magnetooptischer Kerr Effekt Magnetometrie untersucht. Zur weiteren Vertiefung des Verständnisses noch kleinerer Strukturgrößen erfolgten mikromagnetische Simulationen, bei denen die magnetischen Wechselwirkungen lateral (benachbarte 3D Elemente) als auch vertikal (Wechselwirkungen ferromagnetischer Schichten innerhalb eines 3D Elementes) im Interesse standen, sowie deren Auswirkungen auf das Ummagnetisierungsverhalten des gesamten Feldes. Der Fokus des zweiten Teils liegt auf der Untersuchung des Riesenmagnetwiderstandseffektes in Systemen mit senkrechter Sensitivität. Dafür sind ferromagnetische Schichten mit senkrechter magnetischer Anisotropie nötig, wobei hier die chemisch geordnete L10-Phase der FePt Legierung und [Co/Pt] sowie [Co/Pd] Multilagen Anwendung fanden. Für eine chemische Ordnung der FePt Legierung sind hohe Temperaturen während der Schichtabscheidung notwendig, welche eine hinreichende Austauschentkopplung beider ferromagnetischer Schichten meist nicht gewährleisten. Grund dafür sind einsetzende Diffusionsprozesse als auch Legierungsbildungen mit dem Zwischenschichtmaterial. In der vorliegenden Arbeit konnte der GMR Effekt daher ausschließlich mit einer Ru Zwischenschicht in FePt basierten Trilagensystemen nachgewiesen und charakterisiert werden. Enorme Verbesserungen der magnetoresistiven Eigenschaften werden im Anschluss für [Co/Pt] und vor allem [Co/Pd] Multilagen vorgestellt. Diese Schichtsysteme mit senkrechter magnetischer Anisotropie können bei Raumtemperatur präpariert werden und stellen daher keine weiteren Anforderungen an das Zwischenschichtmaterial sowie die verwendeten Substrate. Hier wurden neben Systemen mit ausschließlich senkrechter magnetischer Anisotropie auch Systeme mit gekreuzten magnetischen Anisotropien intensiv untersucht, da diese durch einen linearen und weitgehend hysteresefreien R(H) Verlauf imHinblick auf Sensoranwendungen enorme Vorteile bieten. Letztendlich wurde die Korrosionsbeständigkeit in Abhängigkeit des Deckschichtmaterials als auch die mechanische Belastbarkeit von auf flexiblen Substraten abgeschiedenen GMR-Schichtstapeln untersucht. Zusätzlich wird in Kapitel 2.5.2 eine experimentelle Studie zum Surfactant-gesteuerten Wachstum der FePt Legierung mittels Molekularstrahlepitaxie vorgestellt. Als Surfactant dient Sb, wodurch die Kristallinität bei geringer Depositionstemperatur deutlich verbessert werden konnte. Die Oberflächensegregation von Sb wurde mittels Auger Elektronenspektroskopie und Rutherford Rückstreuspektrometrie verifiziert und die Charakterisierung magnetischer Eigenschaften belegt einen Anstieg der magnetischen Anisotropieenergie im Vergleich zu Referenzproben ohne Sb.
Matthes, Patrick. "Magnetic and Magneto-Transport Properties of Hard Magnetic Thin Film Systems." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-192683.
Full textDie vorliegende Dissertation beschäftigt sich mit der Untersuchung ferromagnetischer Dünnschichtsysteme im Hinblick auf die Austauchkopplung, das Ummagnetisierungsverhalten und Effekte wie z.B. den Exchange Bias Effekt oder den Riesenmagnetwiderstandseffekt (GMR), welche in derartigen Heterostrukturen auftreten können. Die Probenpräparation erfolgte mittels DC Magnetronsputtern, wobei auf einkristallinen aber auch flexiblen sowie starren amorphen Substraten abgeschieden wurde. Im ersten Teil der Arbeit werden Untersuchungen mit dem Hintergrund einer Anwendung als magnetischer Datenträger vorgestellt. Konkret werden hier die Konzepte Bit Patterned Media (BPM) und 3D Speicher miteinander kombiniert. Letzteres Konzept basiert auf der Verwendung wenigstens zweier austauschentkoppelter ferromagnetischer Schichten, für welche [Co/Pt] Multilagen mit unterschiedlicher magnetischer Anisotropie verwendet wurden. Als Zwischenschichtmaterial diente Pt und Ru. Durch die Charakterisierung des Ummagnetisierungsverhaltens wurde die Austauschkopplung in Abhängigkeit der Zwischenschichtdicke untersucht. Darüber hinaus wurden jene Schichtstapel zur Realisierung des BPM-Konzeptes auf selbstangeordnete SiO2 Partikel mit unterschiedlichen Durchmessern aufgebracht, durch welche sich lateral austauschentkoppelte, eindomänige magnetische Nanostrukturen erzeugen lassen. Zur Untersuchung des Ummagnetisierungsverhaltens und der jeweiligen Größenabhängigkeiten (maßgeblich Durchmesser und Schichtdicke) wurden diese mittels Magnetkraftmikroskopie sowie winkelabhängiger magnetooptischer Kerr Effekt Magnetometrie untersucht. Zur weiteren Vertiefung des Verständnisses noch kleinerer Strukturgrößen erfolgten mikromagnetische Simulationen, bei denen die magnetischen Wechselwirkungen lateral (benachbarte 3D Elemente) als auch vertikal (Wechselwirkungen ferromagnetischer Schichten innerhalb eines 3D Elementes) im Interesse standen, sowie deren Auswirkungen auf das Ummagnetisierungsverhalten des gesamten Feldes. Der Fokus des zweiten Teils liegt auf der Untersuchung des Riesenmagnetwiderstandseffektes in Systemen mit senkrechter Sensitivität. Dafür sind ferromagnetische Schichten mit senkrechter magnetischer Anisotropie nötig, wobei hier die chemisch geordnete L10-Phase der FePt Legierung und [Co/Pt] sowie [Co/Pd] Multilagen Anwendung fanden. Für eine chemische Ordnung der FePt Legierung sind hohe Temperaturen während der Schichtabscheidung notwendig, welche eine hinreichende Austauschentkopplung beider ferromagnetischer Schichten meist nicht gewährleisten. Grund dafür sind einsetzende Diffusionsprozesse als auch Legierungsbildungen mit dem Zwischenschichtmaterial. In der vorliegenden Arbeit konnte der GMR Effekt daher ausschließlich mit einer Ru Zwischenschicht in FePt basierten Trilagensystemen nachgewiesen und charakterisiert werden. Enorme Verbesserungen der magnetoresistiven Eigenschaften werden im Anschluss für [Co/Pt] und vor allem [Co/Pd] Multilagen vorgestellt. Diese Schichtsysteme mit senkrechter magnetischer Anisotropie können bei Raumtemperatur präpariert werden und stellen daher keine weiteren Anforderungen an das Zwischenschichtmaterial sowie die verwendeten Substrate. Hier wurden neben Systemen mit ausschließlich senkrechter magnetischer Anisotropie auch Systeme mit gekreuzten magnetischen Anisotropien intensiv untersucht, da diese durch einen linearen und weitgehend hysteresefreien R(H) Verlauf imHinblick auf Sensoranwendungen enorme Vorteile bieten. Letztendlich wurde die Korrosionsbeständigkeit in Abhängigkeit des Deckschichtmaterials als auch die mechanische Belastbarkeit von auf flexiblen Substraten abgeschiedenen GMR-Schichtstapeln untersucht. Zusätzlich wird in Kapitel 2.5.2 eine experimentelle Studie zum Surfactant-gesteuerten Wachstum der FePt Legierung mittels Molekularstrahlepitaxie vorgestellt. Als Surfactant dient Sb, wodurch die Kristallinität bei geringer Depositionstemperatur deutlich verbessert werden konnte. Die Oberflächensegregation von Sb wurde mittels Auger Elektronenspektroskopie und Rutherford Rückstreuspektrometrie verifiziert und die Charakterisierung magnetischer Eigenschaften belegt einen Anstieg der magnetischen Anisotropieenergie im Vergleich zu Referenzproben ohne Sb
Glassman, Rodney Britz. "Interactive Agricultural Experiences of 4th Grade Students in the Arid Southwest: An Examination of the Impact of Hands-On Learning Experiences as a Component of Agriculture in the Classroom Curriculum." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1302%5F1%5Fm.pdf&type=application/pdf.
Full textHall, Kenneth Estes, Esther Yau, and Tony Williams. "Running Out of Time, Hard-Boiled, and the 24-Hour Cityscape." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/465.
Full textBjörk, Mathilda. "Aspects of Disability in Rheumatoid Arthritis : a five-year follow-up in the Swedish TIRA project." Doctoral thesis, Linköpings universitet, Rehabiliteringsmedicin, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11956.
Full textMcGourlay, Jamie Charles. "Envelope/fill-gas interactions inside an operating hard-glass tungsten halogen lamp." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340184.
Full textKörte, Konrad. "Die Oper im Film : Analysen des Produktionsapparates und der Regie an Hand von Giuseppe Verdis" Othello"in der Inszenierung für den Film von Walter Felsenstein /." Frankfurt am Main ; Bern ; Paris : P. Lang, 1989. http://catalogue.bnf.fr/ark:/12148/cb35163202f.
Full textBlok, Cornelia Marijke Frances. "Fate and the hand of Hardy, a comparative study of five of his works and their relative success." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ62113.pdf.
Full textKacsir, Marci Adair. "If I Had a Puppy." Miami University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=miami1163219918.
Full textSiebert, Ulrich Eberhard. "Filmmusik in Theorie und Praxis : eine Untersuchung der 20er und frühen 30er Jahre anhand des Werkes von Hans Erdmann /." Frankfurt am Main ; Bern ; Paris : P. Lang, 1990. http://catalogue.bnf.fr/ark:/12148/cb35347626f.
Full textJonker, Casper Hendrik. "The influence of glide path preparation on the failure rate of nickel-titanium reciprocating instruments." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/40703.
Full textDissertation (MSc)--University of Pretoria, 2013.
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Jäckle, Yves. "Mobile Marketing im Handel." St. Gallen, 2007. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/01651306002/$FILE/01651306002.pdf.
Full textSriram, K. "A Finite Element Investigation Of Brittle Fracture During Spherical Nanoindentation Of Thin Hard Films." Thesis, Indian Institute of Science, 2001. http://hdl.handle.net/2005/252.
Full textJohnson, Stephen Patrick. "Staying power the mainstreaming of the hard-core pornographic film industry, 1969-1990/." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9120.
Full textThesis research directed by: Dept. of History. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Ekelund, Jenni. "Hard og kvass, eller mild og gild? : En studie av fire skipsrederes nekrologer." Thesis, Karlstads universitet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84031.
Full textShan, Lei. "Fluid pressure distribution at the interface between compliant and hard surfaces." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17788.
Full textHarfst, Benjamin [Verfasser]. "Strahlendosis und Bildqualität von Röntgenaufnahmen der Hand unter Verwendung eines Film-Folien-Systems und eines Speicherfolien-Systems / Benjamin Harfst." Gießen : Universitätsbibliothek, 2011. http://d-nb.info/1063110661/34.
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