To see the other types of publications on this topic, follow the link: FEBI.
Dissertations / Theses on the topic 'FEBI'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'FEBI.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Spansk, Mattis. "Europe Calls →FEBI eller ESEC? : - Financial European Bureau of InvestigationellerEuropean Securities and Exchange Commission." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-439573.
Full textAbstract:
Min ambition är att med aktuellt material samt med en handfull adekvata metoder pröva mintes om att det krävs en central europeisk myndighet, med såväl polis, åklagare som domstol,som är underställd justitiedepartementen med fullt mandat för att komma tillrätta med en utavvår tids största globala organiserade brottsligheter, Penningtvätt. Detta hotar samhälletsförtroende för kapitalmarknaderna, kan leda till finansiell systemkris och på det stora helasåledes vårt moderna sätt att leva. Samhällskontraktet mellan staten och dess medborgareutmanas. Människans innersta väsen, med en epigenetisk tillika predisponerad girighet står idirekt polemik med vårt sätt att på nations och unions vägar mitigera detta humana drag. Utanett skifte från förvaltningsrätten till straffrätten, med en verkställighet med tydligt preventivaoch direkt effektiva sanktioner som är större än ett ändrat arbetssätt och lite penningböter(som till slut diskonteras i Bankernas P/L kalkyler), så står inte dessa väl cementeradeinstitutioner till svars som en del utav en lösning. Inte heller är regleringen i form av lagar,regler och förordningar optimal, den borde kräva med [emfas] (direkt kausalitet) en vässadverkställighet och inte ett samordnande av artiklar, direktiv, regler och förslag. Bankerna,vågar jag påstå (stryk: att vi idag med all säkerhet kan stipulera), är en avgörande del avproblemet, vilket jag varken tror de vill eller skall så vara: de är en av nycklarna till lösningenpå problemet med penningtvätt. Alltså annorlunda uttryckt: hur får sheriffen kulor i revolvernoch hur får vi sheriffen att ta till mod för att stämma i bäcken? Sheriffen är härtillsynsmyndigheten. Hur skiftar vi paradigmet hos nyckelaktören: banken? Vad skulle kunnaskrämma banker och bankanställda till compliance/efterlevnad? Kan vi jämföra med och hurfår vi i så fall fram ett ställföreträdaransvar likt det sjukvården besitter?
2
Matei, Marius-Febi [Verfasser], Nikolai [Akademischer Betreuer] [Gutachter] Kuhnert, Werner [Gutachter] Nau, and Ulrich [Gutachter] Engelhardt. "Synthesis and Analysis of Chlorogenic Acid Derivatives from Food Processing / Marius-Febi Matei ; Gutachter: Nikolai Kuhnert, Werner Nau, Ulrich Engelhardt ; Betreuer: Nikolai Kuhnert." Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2017. http://d-nb.info/1128907313/34.
Full text
3
Molina-Sepulveda, Roberto. "Hybridization of FETI Methods." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066455/document.
Full textAbstract:
Dans le présent travail, des nouvelles méthodes de décomposition de domaine et des nouvelles implémentations pour des méthodes existantes sont développées. Une nouvelle méthode basée sur les méthodes antérieures de décomposition du domaine est formulée. Les méthodes classiques FETI plus FETI-2LM sont utilisées pour construire le nouveau Hybrid-FETI. L'idée de base est de développer un nouvel algorithme qui peut utiliser les deux méthodes en même temps en choisissant dans chaque interface l'état le plus adapté en fonction des caractéristiques du problème. En faisant cela, nous recherchons un code plus rapide et plus robuste qui peut fonctionner avec des configurations selon lesquelles les méthodes de base ne le géreront pas de manière optimale par lui-même. La performance est testée sur un problème de contact. La partie suivante implique le développement d'une nouvelle implémentation pour la méthode S-FETI, l'idée est de réduire l'utilisation de la mémoire de cette méthode, afin de pouvoir fonctionner dans des problèmes de taille plus important. Différentes variantes pour cette méthode sont également proposées, tout en cherchant la réduction des directions stockées chaque itération de la méthode itérative. Finalement, une extension de la méthode FETI-2LM à sa version en bloc comme dans S-FETI, est développée. Les résultats numériques pour les différents algorithmes sont présentésIn this work new domain decomposition methods and new implementations for existing methods are developed. A new method based on previous domain decomposition methods is formulated. The classic FETI plus FETI-2LM methods are used to build the new Hybrid-FETI. The basic idea is to develop a new algorithm that can use both methods at the same time by choosing in each interface the most suited condition depending on the characteristics of the problem. By doing this we search to have a faster and more robust code that can work with configurations that the base methods will not handle it optimally by himself. The performance is tested on a contact problem. The following part involves the development of a new implementation for the S-FETI method, the idea is to reduce the memory usage of this method, to make it able to work in larger problem. Different variation for this method are also proposed, all searching the reduction of directions stored each iteration of the iterative method. Finally, an extension of the FETI-2LM method to his block version as in S-FETI, is developed. Numerical results for the different algorithms are presented
4
Liu, Fei. "Réactions de fluoration de dérivés azotés insaturés en milieu superacide." Poitiers, 2010. http://theses.edel.univ-poitiers.fr/theses/2010/Liu-Fei/2010-Liu-Fei-These.pdf.
Full textAbstract:
L'utilisation des milieux superacides modifiant la réactivité des substrats organiques permet d'effectuer de nouvelles réactions et d'accéder rapidement à des produits originaux difficilement accessibles par les méthodes classiques. Il est alors possible de réaliser de nombreuses transformations directes, notamment des réactions de fluoration originales. Ce travail est consacré à l'étude de la réactivité de dérivés azotés insaturés en milieu superacide HF/SbF5 et en particulier au développement de nouvelles méthodes de fluoration de ce type de composés. Basée sur la formation d'intermédiaires dicationiques superélectrophiles, une nouvelle réaction d'hydrofluoration a été développée. L'utilisation de l'activation superélectrophile en milieu superacide a également permis la synthèse originale de sulfonamides cycliques et/ou fluorés. Après identification d'intermédiaires réactionnels polycationiques par analyse RMN in situ, une nouvelle méthode de synthèse de dérivés azotés gem-chlorofluorés et gem-difluorés a finalement été élaboréeIn superacid the reactivity of organic substrates is strongly modified and new reactions can be performed, which allows a rapid access to original products. In these conditions, multiple direct transformations occur and especially original fluorination reactions. This work was devoted to the study of the reactivity of unsaturated nitrogen derivatives in superacid (HF/SbF5) and to the development of new methods of fluorination of these compounds. Based on the formation of superelectrophilic dicationic intermediates, a new reaction of hydrofluorination has been developed. The use of superelectrophilic activation in superacid also allowed the original synthesis of benzofused sultams and/or fluorinated sulfonamides. After identification of reaction polycationic intermediates by NMR in situ analysis, a new synthetic route to gem-chlorofluoro nitrogen derivatives or gem-difluoro nitrogen derivatives has finally been set up
5
Toulougoussou, Ange Barthélemy. "Méthodes de sous-domaines pour le système de Stokes." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066694.
Full textAbstract:
L'objectif de cette thèse est de développer une méthode de décomposition de domaine pour la résolution du système de Stokes discrétisé avec les éléments finis mixtes stables où la pression est continue comme Hood-Taylor et Mini. La nouvelle méthode résulte dela combinaison de FETI qui est appliquée à la vitesse et de BDD qui est appliquée à la pression sans découpler les inconnues. Elle hérite et découple les projecteurs grossiers associés à FETI et à BDD. La méthodologie débouche sur un système linéaire symétrique,semi-défini positif que nous avons résolu par la méthode du gradient conjugué projeté préconditionné. La méthode contient deux préconditionneurs grossiers creux et des préconditionneurs locaux exacts qui assurent son extensibilié, sa robustesse et son efficacité. L'introduction de projecteurs locaux construits à partir des modes de pression des sousdomaines étend la méthode aux éléments finis mixtes discontinues en pression et rend le problème grossier de BDD facultatif même en présence de la pression aux interfaces.Nous avons aisément appliqué la méthode à l'élasticité incompressible et quasi-incompressible et elle peut s'étendre de la même façon au cadre plus général des systèmes de point-selle issus des problèmes de minimisation sous contraintes grâce à sa nature algébriqueThe purpose of this thesis is to develop a domain decomposition method suitable tosolve the Stokes system discretized with stable mixte finite elements where pressure is continuous such as Hood-Taylor and Mini. The new method arises from the combinaison of FETI applied to the velocity and BDD applied to the pressure without decoupling the unknowns. It inherits and decouples the coarse projectors included in FETI and BDD. The methodology leads to a symmetric, positive semi-definite linear system that we solveby projected preconditioned conjugate gradient. The method contains two sparse coarse preconditionners and exact local preconditionners that ensure its scalability, its robustness and its efficiency. We use local projectors constructed from the constant pressure modes of the subdomains that enable an extension to mixte finite elements with discontinuous pressure and that make the coarse problem of BDD optional even in the presence of pressure on the interfaces. We have easily applied the method to incompressibleand almost incompressible elasticity and it can be extended the same way to other saddle-point systems arising from minimization problems under constraints due to its algebraic property
6
Johannesson, Simon. "Förskolor med passivhusteknik : En utredning av passiva förskolor." Thesis, Uppsala universitet, Byggteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-209095.
Full textAbstract:
As a result of directives from EU, with the ambition to reach environmetal goals, The German organisation Passivhaus Institut has defined a passive house. A passive house is a building that is very energy efficient and makes a small impact on the environment. The energy from the inhabitants as well as the appliances & fixtures in the building should equal the energy that is required to heat the building. A Swedish version of the passive house definition has been defined, taking into account the climate conditions and the difference in building regulations. This thesis is a request from Skanska on how it can improve and develop an ongoing passive house project, involving an infant school. The intention of this thesis is to identify difficulties & display potential development areas for infant schools. The method of research conducted is as follows: interviews of clients, ventilation consultant, consultant for heating system and an energy calculation consultant, an inspection of the infant shcool in process, investigation of completed infant schools and a study of relevant literature. From this research it was found that it is difficult for infant schools to pass the criteria for passive houses. The conclusion of this thesis provide several guidelines on how to improve the outcome of existing projects & the steps needed to be taken for future development in this area.
7
Adeyemi, Adesola Olusiji. "The dramaturgy of Femi Osofisan." Thesis, University of Leeds, 2009. http://etheses.whiterose.ac.uk/8935/.
Full text
8
Sanghavi, Chaitanya. "FETI methods for acoustic problems with porous materials." Thesis, Le Mans, 2020. http://www.theses.fr/2020LEMA1021.
Full textAbstract:
E présent travail traite de la modélisation numérique de traitements acoustiques à grande échelle en utilisant des méthodes de décomposition de domaine (MDD). Les principaux objectifs de la thèse sont triples : Premièrement, un choix de méthode de décomposition de domaine (DDM) approprié pour résoudre des problèmes de Helmholtz homogènes et hétérogènes à grande échelle est fait. Deux variantes différentes des méthodes FETI, à savoir FETI-2LM et FETI-H, sont mises en œuvre et comparées. Un choix approprié de la méthode est fait. Ensuite, une nouvelle stratégie de résolution est appliquée au DDM choisi pour résoudre de nombreux traitements acoustiques. Cette stratégie vise à réduire les coûts de calcul associés aux étapes. Troisièmement, des stratégies alternatives sont examinées pour réduire les coûts associés aux coûts itératifs du DDM. Une nouvelle méthode FETI-2LM à deux niveaux est formulée pour réduire les coûts des évaluations successives des revêtements. Une autre stratégie de recyclage basée sur l'utilisation des valeurs propres les plus influentes est examinée pour la méthode FETI-2LM. Un choix approprié de ces méthodes est fait. La modélisation numérique des traitements acoustiques à l'aide de méthodes efficaces nécessite des coûts de calcul importantss dans la phase de conception. Ce travail fournit une contribution permettant de résoudre ce problème à l'aide de la DDMSound absorbing materials such as foams are widelyused in many industrial and domestic applications toabsorb undesirable sound. One needs to perform many calculations to get desirable properties of thetreatment using optimization strategies.The state-of-the-art computational models requireprohibitively high computational time. Theproblematic of this PhD is to reduce thecomputational time for such models to speed updesign calculations.This document is a synthesis of the work carried outin this direction. The problem is addressed usingDomain Decompostion methods (DDM). It consists ofsplitting the original problem into small parts referredto as subdomains. A partial solution is computed onthese subdomains to match the global continuity inthe domain of interest. Different DDM methods are benchmarked in termsof performance and scalability , specific for porousmaterials. Any DDM consists of two major costs, thefactorization of the subdomains and iterative part forthe global convergence. A novel factorizationstrategy is implemented and applied in 2D and 3Dto demonstrate savings in time compared toconventional approaches. In the second part, themethod is further improved to reduce the iterativecosts for a series of calculations.A final workflow is proposed to make thecomputationa cost of these models afforable withinindustrial timeframes
9
Enjebo, Jonas, and Martin Wallentin. "Passivhus : En jämförelse mellan olika byggnadstekniska lösningar för ytterväggar." Thesis, KTH, Byggvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102418.
Full textAbstract:
This report aims to examine the design of a passive house. The design addresses the selection of material, sizing and selection of both building services systems and building technical features such as load-bearing framework and moisture control. Interior layout is designed for a family of two adults and one child. A big part of the report is devoted to an in-depth comparison of three different wall constructions of passive house standard. The structures that have been compared are a lightweight timber structure, a heavier concrete structure and a sandwich wall of the brand Weber Leca. The report covers various aspects such as air flow, wall thickness, the risks associated with the construction, U-value, thermal bridges, power consumption, price, and assembly costs. The purpose is to decide what kind of wall that would be the best option for the house. To give a satisfactory answer to this, two other questions first needed to be answered; "what is a passive house?" and "what is the difference between a passive and an ordinary house?" . It doesn´t exist a clear definition of what a passive house is, however, Forum för energieffektiva byggnader (roughly translated in to the Forum for energy efficient buildings , referred to in the text as: FEBY) has developed a specification for low energy houses. The specification contains specific numbers on how much power and energy a house can consume and still be called a passive house. The main difference between an ordinary house, and a passive house turned out to be precisely those numbers. It is worth noting that no specific requirements, except requirements for U-values of windows, is required by the design itself to be called a passive house as long as you meet the energy and power specification (Erlandsson et al., 2009). The final analysis for the three wall structures were made using a weighting table and the result was that the concrete wall was the best suited for this purpose. When the house was planned with this wall structure it manage to accomplish the FEBY requirements that have been addressed in this report and thus can be presented as "projected for Passive Houses accorded to FEBY" (Erlandsson et al., 2009).
10
Hamrit, Oussama. "Etude des pertes magnétiques dans les matériaux magnétiques destinés aux applications de transport en haute fréquence et sous champ bidirectionnel." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLN003/document.
Full textAbstract:
Les pertes fer dans une machine électrique sont d'importance capitale, une estimation approximative de ces pertes peu mener à des solutions non viable sur le plan thermique, c'est dans ce contexte qu'il est indispensable d'avoir les caractéristiques les plus précises des matériaux magnétiques utilisés, de plus avec l'engouement récent pour les machines électriques haute vitesse (donc haute fréquence), il est important de caractériser les matériaux à haute fréquence. Dans les travaux de cette thèse, un système de mesure haute fréquence (1 T - 10 kHz) en champ unidirectionnel a été mis en place et des modèles de pertes magnétiques hautes fréquences ont été étudiés et discutés. Les champs magnétiques circulant dans une machine électrique sont de type alternatifs dans une direction donnée ou des champs elliptiques et tournants. C'est dans ce contexte qu'une caractérisation et un modèle en champ tournant ont été proposés. Enfin, dans le cas où le stator d'une machine électrique est découpé d'un seul tenant, la direction de découpe par rapport àla direction de laminage change d'un pas dentaire à un autre, pour cela une étude sur l'anisotropie des matériaux FeSi non orientés a été menéeIron losses in electrical machine applications are of paramount importance, an approximate estimation of these losses can easily lead to a thermally unsustainable solution, in this context, it is essential to get exactly the magnetic characteristics of the magnetic materials used, moreover, with the recent interest for high speed electrical machines (high frequency), It is important to characterize magnetic materials at high frequency. In this work, a high frequency characterizing system (1 T - 10 kHz) under unidirectional field has been proposed and magnetic losses models has been studied and discussed. Magnetic fields in electrical machines could be alternative in one direction, elliptical or circular. In this context, a characterization under rotating field and a magnetic loss model has been proposed. Finally, when stator steel sheets are cut all in one piece, the cutting direction with regard to the rolling direction will change from one tooth pitch to another, for that a study of the FeSi non oriented anisotropy has been performed
11
Corrêa, Lucas Eduardo. "Investigação de supercondutividade em boreto do sistema Ta-Zr-B." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/97/97135/tde-03122018-184821/.
Full textAbstract:
Em trabalhos anteriores realizados em síntese e caracterização cristalográfica, a existência de uma nova fase de estequiometria Ta1-xHfxB (com x variando no intervalo entre 0,05 e 0,4) que cristaliza no protótipo FeB foi descoberta. Este ternário cristaliza num protótipo diferente do protótipo CrB aceito no binário TaB. Na verdade, essa substituição é capaz de gerar uma mudança significativa na estrutura cristalina de TaB, a qual sofre uma distorção e modifica o protótipo CrB para FeB. Além desta mudança estrutural os compostos de composição global Ta1-xHfxB apresentam supercondutividade com temperatura crítica supercondutora acima do binário TaB (Tc ~ 4,0 K). Foi observado que a supercondutividade otimizada na composição Ta0,7Hf0,3B com Tc ~ 6,7 K na qual medidas de calor específico revelam forte assinatura de manifestação multibanda neste novo composto. Motivados por esta descoberta, neste trabalho são investigadas a possiblidade desta transformação estrutural bem como o seu impacto nas propriedades supercondutoras em ligas de composição global Ta1-xZrxB, devido à similaridade eletrônica entre Zr e Hf na tabela periódica. De fato, resultados publicados a respeito da transformação cristalográfica com a substituição de Ta por Zr revelam o mesmo comportamento observado nas ligas produzidas com Hf e este trabalho revela que os compostos Ta1-xZrxB também são supercondutores. A composição com a maior temperatura crítica é Ta0,8Zr0,2Be tem uma temperatura de transição aproximadamente 7,8 K. Entretanto, esse composto tem evidencia de um supercondutor não convencional. Assim, este trabalho revela a existência de supercondutividade não convencional em ligas do sistema ternário Ta-Zr-B revelados por medidas de resistividade, magnetização e caracterização estrutural e microestrutural.In previous works carried out in synthesis and crystallographic characterization, the existence of a new Ta1-xHfxB stoichiometry phase (with x varying in the interval between 0.05 and 0.4) that crystallizes in the FeB prototype was discovered. This ternary crystallizes in a prototype different from the prototype CrB accepted in the TaB binary. In fact, this substitution is capable of generating a significant change in the crystalline structure of TaB, which undergoes distortion and modifies the CrB prototype for FeB. In addition to this structural change, the compounds of global composition Ta1-xHfxB present superconductivity with critical superconducting temperature above the TaB Tc ~ 4.0 K. It was observed that the superconductivity optimizes at Ta0,7Hf0,3B composition with Tc ~ 6.7 K in which specific heat measurements reveal a strong multiband manifestation signature in this new compound. Based on this finding, this work investigates the possibility of this structural transformation as well as its impact on the superconducting properties of alloys of global composition Ta1-xZrxB, due to the electronic similarity between Zr and Hf in the periodic table. In fact, published results on crystallographic transformation with the substitution of Ta by Zr reveal the same behavior observed in the alloys produced with Hf and this work reveals that the Ta1-xZrxB compounds are also superconducting. The composition with the highest critical temperature is Ta0,8Zr0,2Band has a transition temperature of about 7.8K. However, this compound has evidence of an unconventional superconductor. Thus, this work reveals the existence of unconventional superconductivity in alloys of the Ta-Zr-B ternary system revealed by resistivity, magnetization and structural and microstructural characterization measurements.
12
Luk, Yu-shing. "A study of Yue Fei studies since late Qing Qing mo yi lai zhi Yue Fei yan jiu /." Click to view the E-thesis via HKUTO, 1995. http://sunzi.lib.hku.hk/hkuto/record/B31950838.
Full text
13
Reeve, Michael Andrew Hall. "Demonstrating the world mind and society in the Shuo Lin chapters of the "Han Fei Zi" /." online access from Digital Dissertation Consortium access full-text, 2003. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3080034.
Full text
14
Brandt, Josef. "Passivhus med prefabelement : En jämförelse mellan en platstillverkad konstruktion och prefabelement från Masonite Lättelement AB." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-172595.
Full textAbstract:
This thesis conducted at the University of Uppsala investigateshow well a prefabricated building component from the manufacturerMasonite Lättelement AB can be incorporated into ahouse projected to accomplish the demanding criteria of a passivehouse. The thesis is organized as a comparison betweenthe prefabricated elements and an on-site built component fromthe passive house area of Oxtorget in Värnamo, Sweden. Theaspects investigated were air leakage, energy, moisture, economyand noise conditions.Results of the comparative analyzes shows that the prefabricatedproducts were capable of accomplishing the requirementsof passive houses and therefore this thesis should beviewed as a basis to confirm that the technology of prefabricatedbuilding components today in Sweden are mature enoughto be a significant part of the passive houses that are to be builtin the near future. The development of prefabricated technologyis of crucial significance if we are to accomplish the goalsof reduced energy consumption by the year 2020.
15
Kim, Songkil. "Engineering of carbon electronic devices using focused electron beam induced deposition (FEBID) of graphitic nanojoints." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53054.
Full textAbstract:
This thesis concerns development and characterization of the FEBID technique to improve interfacial properties at MWCNT/graphene-metal junctions by forming graphitic nanojoints using hydrocarbon precursors. A fabrication protocol for ultralow-resistant, Ohmic contacts at MWCNT-metal junctions with FEBID graphitic nanojoints was developed, based on an in-depth topological/ compositional/electrical material characterization, yielding high performance “end” contacts to multiple conducting channels of MWCNT interconnect. Using the FEBID technique as a contact fabrication tool, three fabrication strategies of electrical contacts between the mechanically exfoliated multilayer graphene and a metal interconnect using graphitic nanojoints were proposed and demonstrated experimentally, suggesting one of them, the post-deposited FEBID graphitic interlayer formation, as the most efficient strategy. A patterned CVD grown monolayer graphene, which is a promising material for large area graphene device fabrication, was contacted to metal electrodes through the FEBID graphitic interlayer, whose formation and chemical coupling to graphene and metal were theoretically and experimentally explored. The effects of FEBID process on the graphitic interlayer formation and graphene electronic devices were demonstrated through electrical measurements, including the transmission line method (TLM) measurements for separate evaluation of sheet and contact resistances. Modifications of the graphene channel as well as interfacial properties of the graphene-metal junctions were achieved, highlighting a unique promise of the FEBID technique as a tool for enhancing chemical, thermo-mechanical, and electrical properties of graphene-metal interfaces along with controllable tuning of doping states of the graphene channel.
16
Marletto, Chiara. "Issues of control and causation in quantum information theory." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:dba641e6-feb3-44df-968f-1b9a6564e836.
Full textAbstract:
Issues of control and causation are central to the Quantum Theory of Computation. Yet there is no place for them in fundamental laws of Physics when expressed in the prevailing conception, i.e., in terms of initial conditions and laws of motion. This thesis aims at arguing that Constructor Theory, recently proposed by David Deutsch to generalise the quantum theory of computation, is a candidate to provide a theory of control and causation within Physics. To this end, I shall present a physical theory of information that is formulated solely in constructor-theoretic terms, i.e., in terms of which transformations of physical systems are possible and which are impossible. This theory solves the circularity at the foundations of existing information theory; it provides a unifying relation between classical and quantum information, revealing the single property underlying the most distinctive phenomena associated with the latter: the unpredictability of the outcomes of some deterministic processes, the lack of distinguishability of some states, the irreducible perturbation caused by measurement and the existence of locally inaccessible information in composite systems (entanglement). This thesis also aims to investigate the restrictions that quantum theory imposes on copying-like tasks. To this end, I will propose a unifying, picture-independent formulation of the no-cloning theorem. I will also discuss a protocol to accomplish the closely related task of transferring perfectly a quantum state along a spin chain, in the presence of systematic errors. Furthermore, I will address the problem of whether self-replication (as it occurs in living organisms) is compatible with Quantum Mechanics. Some physicists, notably Wigner, have argued that this logic is in fact forbidden by Quantum Mechanics, thus claiming that the latter is not a universal theory. I shall prove that those claims are invalid and that the logic of self-replication is, of course, compatible with Quantum Mechanics.
17
Lundahl, Bertil. "Han Fei Zi : the man and the work." Doctoral thesis, Stockholm : Institute of oriental languages, 1992. http://catalogue.bnf.fr/ark:/12148/cb35722167q.
Full text
18
Castro, Edgar David Guarin. "Análise das microestruturas magnéticas em filmes de FeNi." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/23286.
Full textAbstract:
Dissertação (mestrado)—Universidade de Brasília, Instituto de Física, Programa de Pós-Graduação em Física, 2017.Submitted by Fernanda Percia França (fernandafranca@bce.unb.br) on 2017-04-06T18:08:38Z No. of bitstreams: 1 2017_EdgarDavidGuarinCastro.pdf: 13967221 bytes, checksum: 5cf464b7be6dd878aa1766e53fd3f994 (MD5)
Approved for entry into archive by Raquel Viana(raquelviana@bce.unb.br) on 2017-04-17T17:33:19Z (GMT) No. of bitstreams: 1 2017_EdgarDavidGuarinCastro.pdf: 13967221 bytes, checksum: 5cf464b7be6dd878aa1766e53fd3f994 (MD5)
Made available in DSpace on 2017-04-17T17:33:19Z (GMT). No. of bitstreams: 1 2017_EdgarDavidGuarinCastro.pdf: 13967221 bytes, checksum: 5cf464b7be6dd878aa1766e53fd3f994 (MD5)
O presente trabalho expõe um estudo estrutural e magnético feito em filmes policristalinos de FeNi sobre substratos de Si. Medidas de energia dispersiva de raios X indicaram concentrações relativas de 64% para o ferro e 36% para o níquel, o que significa que os filmes possuem a concentração Invar, fenômeno caracterizado pela queda do coeficiente de dilatação da liga até valores muito baixos. Estudos experimentais mostram que este fenômeno deve estar fortemente vinculado com a estrutura magnética das ligas, mas os modelos teóricos ainda não conseguem explicar completamente a relação entre suas propriedades magnéticas e mecânicas, motivando continuados estudos sobre suas propriedades magnéticas. Nesta pesquisa foi proposto estudar e analisar a configuração micromagnética para três filmes de FeNi na concentração Invar, para três diferentes espessuras (30, 70 e 140 nm), por meio de técnicas experimentais como a magnetometria e a microscopia de força magnética (MFM), assim como por meio do uso de simulações computadorizadas, para oferecer mais bases experimentais que contribuam na compreensão dos fenômenos presentes nas ligas Invar. Os resultados revelaram inomogeneidades magnéticas causadas pela policristalinidade dos filmes. As amostras também manifestaram um comportamento ferromagnético mole, com magnetizações de saturação e anisotropias efetivas crescentes com o aumento das espessuras. Os resultados também mostraram uma grande influência da anisotropia de forma que faz com que os filmes sejam facilmente magnetizados no plano. Finalmente, com base nas medidas de magnetometria, a estrutura micromagnética dos filmes foi mapeada por medidas de MFM e posteriormente simulada com o software MuMax3. Os mapas revelaram domínios com magnetizações locais paralelas à superfície dos filmes, enquanto que as paredes possuem uma estrutura tipo Bloch, principalmente no interior dos filmes mais grossos. Deste modo, percebe-se que a anisotropia do material define eixos fáceis de magnetização no plano dos filmes, por causa da anisotropia de forma, que obriga às paredes de domínio a se distribuírem nos filmes, formando padrões de ziguezague irregulares na superfície.
The present work reports structural and magnetic study of FeNi polycrystalline films on Si substrates. X-ray dispersive energy measurements indicated relative concentrations of 64% iron and 36% nickel, which means that the films present Invar concentration, a phenomenon characterized by the decrease of the thermal expansion coefficient of the alloy to very low values. Experimental studies show that this phenomenon is strongly related to the magnetic structure of the alloys, but current theoretical models still cannot fully explain the relation between magnetic and mechanical characteristics of Invar alloys, motivating continued studies on their magnetic properties. In this research, the micromagnetic configuration for three FeNi films in Invar concentration and three different thicknesses (30, 70 and 140 nm) is analyzed according to their thicknesses. Experimental techniques such as SQUID magnetometry and Magnetic Force Microscopy (MFM) were used, as well as computer simulations, to offer more experimental bases that contribute to the understanding of the phenomena present in FeNi36 Invar alloys. Results revealed magnetic inhomogeneities caused by film polycrystallinity. The samples also showed a soft ferromagnetic behavior, with increasing saturation magnetizations and effective anisotropies with increasing thicknesses. Results also showed a great influence of shape anisotropy so that the films are easily magnetized in-plane. Finally, magnetometry measurements were complemented by micromagnetic structure mapping by Magnetic Force Microscopy, the resulting magnetic images were later simulated with the software MuMax3. The maps revealed domains with local magnetizations parallel to the surface of the films, while the walls have a Bloch-like structure, mainly inside the thicker films. In this way, the anisotropy of the material defines an easy axis of magnetization in the plane of the films, because of the shape anisotropy, which forces the domain walls to distribute in the films, forming irregular zigzag like patterns on the surface.
19
Witkowski, Thomas. "Software concepts and algorithms for an efficient and scalable parallel finite element method." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-141651.
Full textAbstract:
Software packages for the numerical solution of partial differential equations (PDEs) using the finite element method are important in different fields of research. The basic data structures and algorithms change in time, as the user\'s requirements are growing and the software must efficiently use the newest highly parallel computing systems. This is the central point of this work. To make efficiently use of parallel computing systems with growing number of independent basic computing units, i.e.~CPUs, we have to combine data structures and algorithms from different areas of mathematics and computer science. Two crucial parts are a distributed mesh and parallel solver for linear systems of equations. For both there exists multiple independent approaches. In this work we argue that it is necessary to combine both of them to allow for an efficient and scalable implementation of the finite element method. First, we present concepts, data structures and algorithms for distributed meshes, which allow for local refinement. The central point of our presentation is to provide arbitrary geometrical information of the mesh and its distribution to the linear solver. A large part of the overall computing time of the finite element method is spend by the linear solver. Thus, its parallelization is of major importance. Based on the presented concept for distributed meshes, we preset several different linear solver methods. Hereby we concentrate on general purpose linear solver, which makes only little assumptions about the systems to be solver. For this, a new FETI-DP (Finite Element Tearing and Interconnect - Dual Primal) method is proposed. Those the standard FETI-DP method is quasi optimal from a mathematical point of view, its not possible to implement it efficiently for a large number of processors (> 10,000). The main reason is a relatively small but globally distributed coarse mesh problem. To circumvent this problem, we propose a new multilevel FETI-DP method which hierarchically decompose the coarse grid problem. This leads to a more local communication pattern for solver the coarse grid problem and makes it possible to scale for a large number of processors. Besides the parallelization of the finite element method, we discuss an approach to speed up serial computations of existing finite element packages. In many computations the PDE to be solved consists of more than one variable. This is especially the case in multi-physics modeling. Observation show that in many of these computation the solution structure of the variables is different. But in the standard finite element method, only one mesh is used for the discretization of all variables. We present a multi-mesh finite element method, which allows to discretize a system of PDEs with two independently refined meshesSoftwarepakete zur numerischen Lösung partieller Differentialgleichungen mit Hilfe der Finiten-Element-Methode sind in vielen Forschungsbereichen ein wichtiges Werkzeug. Die dahinter stehenden Datenstrukturen und Algorithmen unterliegen einer ständigen Neuentwicklung um den immer weiter steigenden Anforderungen der Nutzergemeinde gerecht zu werden und um neue, hochgradig parallel Rechnerarchitekturen effizient nutzen zu können. Dies ist auch der Kernpunkt dieser Arbeit. Um parallel Rechnerarchitekturen mit einer immer höher werdenden Anzahl an von einander unabhängigen Recheneinheiten, z.B.~Prozessoren, effizient Nutzen zu können, müssen Datenstrukturen und Algorithmen aus verschiedenen Teilgebieten der Mathematik und Informatik entwickelt und miteinander kombiniert werden. Im Kern sind dies zwei Bereiche: verteilte Gitter und parallele Löser für lineare Gleichungssysteme. Für jedes der beiden Teilgebiete existieren unabhängig voneinander zahlreiche Ansätze. In dieser Arbeit wird argumentiert, dass für hochskalierbare Anwendungen der Finiten-Elemente-Methode nur eine Kombination beider Teilgebiete und die Verknüpfung der darunter liegenden Datenstrukturen eine effiziente und skalierbare Implementierung ermöglicht. Zuerst stellen wir Konzepte vor, die parallele verteile Gitter mit entsprechenden Adaptionstrategien ermöglichen. Zentraler Punkt ist hier die Informationsaufbereitung für beliebige Löser linearer Gleichungssysteme. Beim Lösen partieller Differentialgleichung mit der Finiten Elemente Methode wird ein großer Teil der Rechenzeit für das Lösen der dabei anfallenden linearen Gleichungssysteme aufgebracht. Daher ist deren Parallelisierung von zentraler Bedeutung. Basierend auf dem vorgestelltem Konzept für verteilten Gitter, welches beliebige geometrische Informationen für die linearen Löser aufbereiten kann, präsentieren wir mehrere unterschiedliche Lösermethoden. Besonders Gewicht wird dabei auf allgemeine Löser gelegt, die möglichst wenig Annahmen über das zu lösende System machen. Hierfür wird die FETI-DP (Finite Element Tearing and Interconnect - Dual Primal) Methode weiterentwickelt. Obwohl die FETI-DP Methode vom mathematischen Standpunkt her als quasi-optimal bezüglich der parallelen Skalierbarkeit gilt, kann sie für große Anzahl an Prozessoren (> 10.000) nicht mehr effizient implementiert werden. Dies liegt hauptsächlich an einem verhältnismäßig kleinem aber global verteilten Grobgitterproblem. Wir stellen eine Multilevel FETI-DP Methode vor, die dieses Problem durch eine hierarchische Komposition des Grobgitterproblems löst. Dadurch wird die Kommunikation entlang des Grobgitterproblems lokalisiert und die Skalierbarkeit der FETI-DP Methode auch für große Anzahl an Prozessoren sichergestellt. Neben der Parallelisierung der Finiten-Elemente-Methode beschäftigen wir uns in dieser Arbeit mit der Ausnutzung von bestimmten Voraussetzung um auch die sequentielle Effizienz bestehender Implementierung der Finiten-Elemente-Methode zu steigern. In vielen Fällen müssen partielle Differentialgleichungen mit mehreren Variablen gelöst werden. Sehr häufig ist dabei zu beobachten, insbesondere bei der Modellierung mehrere miteinander gekoppelter physikalischer Phänomene, dass die Lösungsstruktur der unterschiedlichen Variablen entweder schwach oder vollständig voneinander entkoppelt ist. In den meisten Implementierungen wird dabei nur ein Gitter zur Diskretisierung aller Variablen des Systems genutzt. Wir stellen eine Finite-Elemente-Methode vor, bei der zwei unabhängig voneinander verfeinerte Gitter genutzt werden können um ein System partieller Differentialgleichungen zu lösen
20
Gustafsson, Richard, and Mattias Törnqvist. "Energieffektiv byggnad i stadsmiljö." Thesis, Linnaeus University, School of Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-5806.
Full textAbstract:
This report will present an energy efficient building in the centre of Kalmar city. It will
become energy efficient because of the worldwide goal to reduce our energy using in our
buildings.
The values of architecture have been given a great part in this report. The building is supposed to be placed in Kvarnholmen in a unique environment in centre of Kalmar city.
Because of the placement it is very important to show respect to the surroundings and the history of Kalmar.
21
Xu, Fei-Fei [Verfasser]. "Synthetic Oligosaccharides as Tools to Investigate Bacterial Capsular Polysaccharides and Teichoic Acids / Fei-Fei Xu." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1160235759/34.
Full text
22
Costa, Marcos Antonio Tavares da. "A Força Expedicionária Brasileira: memórias de um conflito." Universidade Federal de Juiz de Fora (UFJF), 2009. https://repositorio.ufjf.br/jspui/handle/ufjf/4984.
Full textAbstract:
Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-06-19T20:26:10Z
No. of bitstreams: 1
marcosantoniotavaresdacosta.pdf: 26799730 bytes, checksum: eefc68ea9a4f5a3daa39ee4d0685bb3a (MD5)Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-06-29T12:39:10Z (GMT) No. of bitstreams: 1 marcosantoniotavaresdacosta.pdf: 26799730 bytes, checksum: eefc68ea9a4f5a3daa39ee4d0685bb3a (MD5)
Made available in DSpace on 2017-06-29T12:39:10Z (GMT). No. of bitstreams: 1 marcosantoniotavaresdacosta.pdf: 26799730 bytes, checksum: eefc68ea9a4f5a3daa39ee4d0685bb3a (MD5) Previous issue date: 2009-09-11
Em 16 de julho de 1944, desembarcaram na Itália, os primeiros cinco mil homens da Força Expedicionária Brasileira (FEB) que participariam nos combates contra o poderoso Exército Alemão, em um terreno desconhecido e com um treinamento e equipamento inferiores aos de outras tropas. Muitas foram as dificuldades dos expedicionários ao longo das jornadas de adaptação ao ambiente de guerra, onde a morte era vista a todo o momento nos campos de batalha e nos lares dos italianos. No Brasil a expectativas não foram além de uma participação curiosa de um Exército que ainda padecia de uma melhor organização e modernização, para as famílias, no entanto, a Guerra era um pesadelo cruel, com a possibilidade da perda de pessoas queridas. Após quase 11 meses de uma participação que poderia ser desastrosa, os homens da FEB terminaram vitoriosos ao contribuírem para a derrota dos alemães e pela libertação da Itália. A compreensão da história da FEB passa por compreender como eram os homens que a formaram e que começaram sua epopéia pelo menos 01 ano antes do embarque. Este trabalho estudará não somente aquela Guerra e nem somente a FEB, mas principalmente esses homens.
In 16 of July of 1944, they had disembarked in Italy, first the five a thousand men of Force Brazilian Expedicionária (FEB) that they would participate in the combats against the powerful German Army, in an unknown land and with an inferior training and equipment to the ones of other troops. Many had been the difficulties of the members of an expedition throughout the days of adaptation to the war environment, where the death was seen all the moment in the battlefields and the homes of the Italians. In Brazil the expectations had not been beyond a curious participation of an Army that still suffered of one better organization and modernization, for the families, however, the War were a cruel nightmare, with the possibility of the loss of dear people. After almost 11 months of a participation that could be disastrous, the men of the FEB had finished victorious people when contributing for the defeat of the Germans and for the release of Italy. The understanding of the history of the FEB passes for understanding as they were the men had formed who it and that they had started its epic at least 01 year before the embarkment. This work will not only study that War and nor only the FEB, but mainly these men.
23
Andersson, Josefin, and Ebba Lindmark. "Är det möjligt att uppnå kraven för FEBY Guld oavsett en byggnads placering i Sverige? : Is it possible to meet the requirements for FEBY Gold regardless of location in Sweden?" Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-82741.
Full textAbstract:
I dag sätts flera åtgärder in för att bromsa klimatförändringarna, både inom Sverige och på internationell nivå. ‘Forum för energieffektivt byggande’, FEBY, är en organisation som arbetar med att driva utvecklingen av lågenergibyggnader framåt. FEBY har tagit fram ett certifieringssystem som ska hjälpa byggherrar uppföra byggnader med lägre energianvändning. För att en byggnad ska bli certifierad krävs det att den uppfyller vissa krav, bland annat på värmeförlusttal. Sedan starten 2008 har ca 50 småhus certifierats enligt systemet, vilket väcker frågan om varför så få småhus har certifierats och om detta kan bero på hur kraven är ställda.Syftet med rapporten är att undersöka om de krav som FEBY ställer på värmeförlusttal är rimliga vid byggande av ett småhus oavsett vart i Sverige det är placerat. Undersökningen har gjorts för tre orter i olika delar av Sverige; Lund, Falun och Boden. Byggnadens utformning är densamma på alla tre orter, med undantag för isolertjocklek i ytterväggen. Parametrarna fönsterglasarea, U-värde på fönster, luftläckning och köldbrygga varierades i beräkningarna för att få ett bredare och mer trovärdigt resultat.Undersökningen görs enligt de beräkningar som FEBY hänvisar till i dokumentet FEBY18 med utgångspunkt i krav för värmeförlusttal på nivå FEBY Guld.Rapporten avgränsas till en enplansvilla på 100 m2 uppvärmd golvarea. Ingen hänsyn tas till faktorer så som ljud, sol, fukt, årsvärmefaktor eller värmebalans för luftvärmd byggnad. Inte heller beaktas bärförmåga, motstånd mot brand eller fönstrens läge.Resultatet visar att negativa U-värden uppstår vid flera parametervariationer i Boden och Falun. Negativa U-värden indikerar att ytterväggen måste producera värme, vilket i det här fallet inte är möjligt. I flera fall i Falun och Boden förekommer även så pass låga U-värden att isoleringen behöver anta en tjocklek på över en meter medan isolertjockleken i Lund aldrig överstiger 500 mm. Vid de mest gynnsamma förutsättningarna visar resultatet att det fortfarande är svårt att nå en rimlig isolertjocklek, eller ett positivt U-värde, i Boden och delvis Falun.Slutsatsen är att det går att konstruera en byggnad som når kraven för nivå FEBY Guld i södra Sverige, men att det blir svårare ju längre upp i landet som byggnaden ska uppföras. Tjockare isolering verkar inte göra kraven uppnåeliga i Sveriges norra delar utan med de förutsättningar som undersöks skulle väggen behöva skapa värme om värmeförlusttalet för FEBY Guld ska nås.In the current political climate, several measures are implemented to prevent climate change both in Sweden and internationally. ‘Forum för Energieffektict Byggande’, FEBY, is an 6rganization that aims to contribute to the development and expansion of low-energy buildings. To this end, FEBY has created a certification scheme to help contractors develop buildings with lower energy consumption. To certify a building, the contractor must ensure that certain requirements are met, for example heat loss figures. Since the conception of the certification, only about 50 small houses have been certified. This raises the question of why so few small houses have been certified, and whether this is due to how the requirements are set.The purpose of this report is to investigate whether the heat loss figures that features in FEBY’s certification are reasonable in reference to the construction of small houses regardless of its location in Sweden. To examine this, this study features small house construction in Lund, Falun, and Boden. The overall building design is the same in all three locations, apart from the insulation thickness in the outer wall. The examined parameters for this study include window glass area, U-value of windows, air leakage, and thermal bridges varied in the calculations to ensure a more relevant and reliable result.This study is based on the calculations referred to in the document named FEBY18 which is based on the requirements for heat loss figures according to the FEBY Gold level.The report is limited to a single-floor house of 100 m2 of heated floor area. Factors such as sound, sun, moisture, annual heat factor, or heat balance for air-heated buildings are not considered. Nor is bearing capacity, resistance to fire, or the position of the windows, considered within the study.The result shows that negative U-values occur in several parameter variations in Boden and Falun. Negative U-values indicate that the outer wall must produce heat, which is not possible due to the construction of the wall. In several cases in Falun and Boden the U-values were so low that the insulation would need a thickness of more than one meter, while the insulation thickness in Lund never has to exceed 500 mm. Even during the most favorable conditions, the results still show the difficulty of achieving reasonable insulation thickness, as well as a positive U-value. This is especially true with regards to Boden, but in part also Falun.In conclusion, while it is possible to construct a small house that meet the requirements for the level FEBY Gold in the south of Sweden, it is increasingly challenging the further north you attempt to construct such a building. Even using thicker insulation, the requirements are difficult, if not impossible, to achieve in the north of Sweden. Under current conditions, the wall would need to generate its own heat to meat the heat loss figure demanded by the FEBY Gold standard.
24
Ma, Chi-kin Patrick. "The death of Yue Fei (1103-1142) a critical study = Yue Fei si yin yan jiu /." Click to view the E-thesis via HKUTO, 1999. http://sunzi.lib.hku.hk/hkuto/record/B31952239.
Full text
25
Razafindramanana, Volatiana. "Amélioration et compréhension du mécanisme d'activation de l'alliage FeTi dopé avec de l'hafnium, pour le stockage de l'hydrogène." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0907/document.
Full textAbstract:
La problématique de la première absorption (i.e. étape d’activation) de l’intermétallique FeTi, pour le stockage de l’hydrogène est souvent un frein pour son industrialisation. Le challenge réside dans la conception d’un « nouveau matériau » dont la première étape d’hydrogénation, s’effectue dans les mêmes conditions de température et de pression modérées, que lors de l’hydrogénation réversible. Une solution est de faire appel aux performances d’un élément dopant et/ou à la technique du broyage mécanique. Dans ce manuscrit, nous proposons l’utilisation de l’hafnium comme dopant. Ce projet complète les études qui ont été effectuées sur le zirconium (e.g. le zirconium commercial contient toujours une certaine quantité d’hafnium). L’ajout d’une faible quantité d’hafnium induit la formation d’une phase secondaire, « riche » en hafnium et en fer. Grâce à la présence de cette phase, la cinétique de première absorption est considérablement améliorée, et ce, sans traitement thermique préalable. L’étape d’activation comprend un seul mécanisme lorsque la taille des particules est faible. A contrario, un second mécanisme est mis en évidence, pour des particules de taille supérieure à 0,5 mm. La mécanosynthèse a permis non seulement d’obtenir la phase principale FeTi, mais aussi de favoriser la première absorption d’hydrogène. Des paramètres d’élaboration méticuleusement optimisés ont rendu possible la conception d’un matériau « modèle », par pulvérisation cathodique magnétron, sous forme de couche mince. Ce matériau modèle pourrait servir à étudier et à comprendre la diffusion de l’hydrogène à l’interface de la matrice FeTi et du dopant Zr ou HfThe issue of the first hydrogenation (i.e. activation process) of the intermetallic FeTi for the storage of hydrogen is often a brake for its use in industry. The challenge lies in the design of a "new material" whose first hydrogenation is carried out under the same conditions of moderate temperature and pressure, as during reversible absorption. Efficient solutions are to use a doping element and/or mechanical alloying process. In this work, we propose to use hafnium as a dopant. This project completes the studies that have been carried out on zirconium (e.g. commercial zirconium always contains a certain amount of hafnium). The addition of a small amount of hafnium induces the formation of a secondary phase, "rich" in hafnium and iron. Thanks to the presence of this phase, the kinetics of activation process is improved, without prior heat treatment. The activation process consists of a single step, when the particle size is small. However, a second step appears, for particles bigger than 0.5 mm. The mechanical alloying allowed the formation of the main phase FeTi, and also enhanced the activation process. An accurate control of deposition conditions allow us to design a ″model″ material by magnetron sputtering as thin layers. This ″model″ material can be used to study and understand the hydrogen diffusion, at the interface of the matrix (FeTi) and the dopant (Zr or Hf)
26
Kwan, Miu-fan, and 關妙芬. "Characterization of TM4 of NRAMP1: implication for FEII transport." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B29275143.
Full text
27
Burnetts, Charles. "The concept of sentimentality in critical approaches to film and its cultural antecedents." Thesis, Royal Holloway, University of London, 2011. http://repository.royalholloway.ac.uk/items/3602c69e-176a-49a2-feb6-34c0efee8213/10/.
Full textAbstract:
This thesis examines how sentimentality, as a term central to film criticism, has been mobilized, denigrated, quarantined or ignored over 300 years of aesthetic debate. It responds to the often vexed question of what the sentimental means, by unpacking the concept's intellectual and artistic history, tracing a transition from the Enlightenment use of sentimentality as a positive concept denoting pedagogy and moral feeling, to its entrance into the modern vernacular as a term connoting its own excess, as a function of its alleged appeals to indulgent or unearned pathos. A key question of the research concerns whether the sentimental can be recuperated within contemporary moving- image culture once we are re-familiarized with its early (lesser known about) critical applications. I contend in such a vein that the unpacking of such positive aspects of the sentimental very much colours our critical understanding of such cinematic figures as Charlie Chaplin, Steven Spielberg and those in their wake, both in terms of their films and the reception of those films. I argue that the early, classical and post- classical periods of cinema can be significantly differentiated in terms of how sentimental cinema fares critically, providing new insights into such intellectual spheres as naturalism, modernism and postmodernism in relation to the cultural reception of cinema. Theories of emotion (especially in relation to spectatorship and film theory) are also examined closely up to what I argue to be a now established, and indeed, valorised melodramatic ‘mode' of contemporary mainstream cinema, as applicable to Hollywood and beyond. As a theoretical tradition that both validates ‘feeling' in its pedagogical and idealist aims while remaining problematic ideologically, I show how the sentimental demands to be understood alongside the most contemporary of critical positions, not least in terms of the critical turn towards affect and the body.
28
Michaelides, Sozor Nikos. "Genetics of colonisation in the common wall lizard." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:8d4979dd-febf-45cf-880b-eb9845f8b2be.
Full textAbstract:
In this thesis I set out to further our understanding of the causes and consequences of genetic variation after colonisation events. Specifically, I focused on how historical processes shape genetic diversity and to what extent we can link colonisation history, genetic diversity, individual fitness and population viability. To achieve this, I used a combination of molecular markers, analytical tools and the common wall lizard, Podarcis muralis as a study system. I first infer the origin and genetic architecture of isolated population on islands at the range margin, in relation to mainland populations, to determine whether their current distribution and genetic structure are a result of a historical colonisation event or a more recent introduction. I then unravel the details of human-mediated introductions of P. muralis in England to further test which factors affect their genetic structure. I ask about the contribution of multiple introductions and admixture, the importance of number of founders and the year since their introduction and whether bottleneck events during primary and /or secondary introduction predict the level of genetic diversity in the non-native range. Throughout this study I obtain information on population genetic structure and composition from both native and non-native ranges. This is essential since the (complex) phylogeographic structure of P. muralis in the native range determines the distribution and structure of genetic diversity from which colonists are drawn and the details of colonisation will then reflect in the genetics of non-native populations. Lastly, I assess the consequences of colonisation on reproductive fitness and test for heterozygosity fitness correlations at the individual and population level. Overall, this thesis demonstrates why reconstructing the colonisation history is important when aiming to understand the causes and consequences of genetic variation during colonisation. This information is critical when assessing the relationship between genetic diversity and establishment success. Whether non-native populations have retained sufficient evolutionary potential to adapt to their new climate their long-term viability will be dictated by availability of suitable habitat rather than by internal population factors.
29
Trück, Johannes. "B cell response to pneumococcal vaccines." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:4bbccd8c-febd-4713-a97b-d6a8a08e3979.
Full textAbstract:
Streptococcus pneumoniae is a significant cause of mortality and morbidity in both children and older adults, with infection resulting in invasive disease, pneumonia and otitis media. The inclusion of pneumococcal conjugate vaccines in routine infant immunisation programmes has had a major impact on disease rates. Vaccine-induced protection against pneumococcal infection is thought to be mediated by the generation of persistent serotype-specific functional antibodies and antigen-specific memory B cells, the latter capable of generating a rapid secondary antibody response on re-exposure to antigen. Although many studies have investigated the immunogenicity of pneumococcal vaccines in different age groups by measuring serotype-specific antibodies, there is more limited information about the B cells underlying such an immune response. Important areas to investigate include the identity of the B cell subsets involved in antibody production and the potential link between memory B cells (BMEM) and persistent antibody production by long-lived plasma cells. In this thesis I have investigated in detail the immune response to pneumococcal vaccines given to children and adults by a variety of different methods. By examining the variability of a BMEM ELISpot method, it was shown that this assay is robust and reproducible and can be performed on fresh or frozen samples and in different laboratories. Using this technique, in a study of pre-school children, it was demonstrated for the first time that the level of pre-existing serotype 3-specific antibody is negatively correlated with, and may directly impair the BMEM response to a booster dose of 13-valent pneumococcal conjugate vaccine (PCV-13) containing serotype 3 glycoconjugate. In the same study, it was shown that antibody persistence against most vaccine serotypes can be expected until the age of 3.5 years. A novel antigen-labelling technique was used in a detailed kinetics study of antigen-specific B cell subsets in response to either PCV-13 or 23-valent pneumococcal polysaccharide vaccine in adults. The results of this study revealed distinct B cell subset response patterns that were observed in all study participants indicating that IgM BMEM seem to play a major role in the immune response to pneumococcal vaccines. In addition, in the same study, genome wide analysis of gene expression was performed and it was shown that vaccination with either a pneumococcal conjugate or polysaccharide vaccine results in a marked difference in numbers of differentially expressed genes 8 days following vaccination. A further tool likely to be of use in investigating B cell responses is the analysis of the antibody repertoire using next-generation sequencing techniques. In order to test the ability of these methods to detect vaccine responses, a large dataset of high-throughput B cell receptor sequences was analysed and revealed convergence of antigen-specific complementary-determining region (CDR)3 amino acid (AA) sequences following vaccination and identified antigen-specific sequences. It was further demonstrated that for sequences directed against the H. influenzae type b (Hib) polysaccharide, diversity of immunoglobulin gene rearrangements is much greater than previously recognised. Frequencies of Hib-specific CDR3 AA sequences were linked with anti-Hib avidity indices highlighting the potential of this method as an alternative (functional) measure of vaccine immunogenicity. These data suggest that studying the B cells and antibody repertoire post-vaccination can give novel insights into the biology that underlies the immune responses.
30
Okoh, Julie Omoifo. "Théâtre et société : Femi Osofisan et S.A. Zinsou : étude comparée." Bordeaux 3, 1992. http://www.theses.fr/1992BOR30042.
Full textAbstract:
Entre le theatre et la societe existent des rapports dialectiques. Et notre but dans ce travail consiste a faire un rapprochement synthetique des oeuvres de deux dramaturges africains contemporains : femi osofisan, nigerian et s. A. Zinsou, togalais. Rapprochement qui permet de deceler des analogies ou des dissemblances dans leur vision du monde a travers leur theatre. Deux visions principales semblent caracteriser leurs oeuvres : pessimisme et optimisme. Le pessimisme ressort de l' evolution des faits sociaux et de la peinture des moeurs contemporaines. D'ou une satire de moeurs et mentalite. En revanche, l'optimisme s'affiche dans leur vision de l'avenir. Face a l' etat d anomie qui domine actuellement leur societe, ils lancent un appel a leurs compatriotes afin qu' ils conjuguent leurs efforts pour la reconstruction du pays. Tandis qie osofisan propose a son public une nouvelle societe de modele socialiste, fondee sur le recours a la raison, a l' esprit scientifique et a la philosophe du travail, excluant les croyances traditionnelles, zinsou preconise le retour aux sources et la rehabilitation de la culture traditionnelle togolaiseBetween theatre and society eexist a dialectic relationship. The theatre gets its material from the society and sends back messages to the society. Our present aim is to make a comparative study of the image of the society in the plays of two african contemporary playwrights : femi osofisan, nigerian and s. A. Zinsou, togolese. Comparison that will enable us to point out the analogy and the dissimilarity in their visions and aldo in the way they try and use theatre to solve some current social issues. Their plays seem mainly caracterised by two antithetical visions : pessimim and optimism. Their evocation of social reality and their picture of contemporary norms ans conventions is couched in pesssimistic tones. On the other hand, optimism appears in their projection towards the future. They appeal to their compatriots to rally together to build their nation. Osofisan proposes a socialist system. Zinsou recommends the re-establishment of a traditional social set up
31
Ma, Chi-kin Patrick, and 馬志堅. "The death of Yue Fei (1103-1142)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31952239.
Full text
32
DUARTE, C. N. B. "Processos Identitários e Saúde Reprodutiva: Estudos com Um Grupo de Doulas." Universidade Federal do Espírito Santo, 2016. http://repositorio.ufes.br/handle/10/3118.
Full textAbstract:
Made available in DSpace on 2016-08-29T14:10:29Z (GMT). No. of bitstreams: 1
tese_8336_Duarte, Camila Nogueira Bonfim - Dissertação versão digital.pdf: 809018 bytes, checksum: 2607f2465617864e77029e4a50f63245 (MD5)
Previous issue date: 2016-02-22Tendo em vista a importância do apoio oferecido às mulheres pelas doulas, e sua crescente atuação no cenário mundial e brasileiro a pesquisa relatada nesta dissertação buscou investigar processos identitários de um grupo de doulas que atua em conjunto, tendo como base a Teoria da Identidade Social. Para isso foram realizados dois estudos com um grupo de cinco doulas, com nome fictício Bem Nascer, atuante em uma cidade do estado do Espírito Santo. Elas concordaram, voluntariamente, em participar desta pesquisa. Os dois estudos são apresentados em formato de artigo para apresentar os resultados e discussões de forma estruturada. O primeiro artigo apresenta os resultados obtidos através de observação participante, realizada em dez encontros mensais sobre gestação e parto, promovidos pelo grupo Bem Nascer junto a gestantes. Foi produzido um diário de campo, cujos dados são analisados a partir do método hermenêutico-dialético (Minayo, 1992). Foram identificadas três categorias: 1) Descrição dos encontros; 2) Cenas de interações com o endogrupo; 3) Cenas de interações com exogrupos. Observou-se que as doulas, nas interações com as gestantes, exerciam papeis tais como: amigas; instrutoras-esclarecedoras; profissionais; militantes feministas; e que valorizavam homens pró-parto e médicos humanizados em detrimento de homens tradicionais e médicos tecnocratas. Infere-se que essa valorização ocorre por categorização cruzada. Verificou-se que as contribuições das doulas para a saúde reprodutiva eram condizentes com diretrizes do sistema público de saúde brasileiro e que elas disseminavam ideais feministas para mulheres de classe média. O segundo artigo utiliza entrevistas individuais semiestruturadas, analisadas através da análise de conteúdo temática (Bardin, 1977), que permitiu identificar 134 temas e seis categorias. Os processos identitários das doulas estão ligados à militância feminista, ao movimento de humanização do parto, e ao pertencimento a um grupo de trabalho que constitui laços profissionais, de amizade e confiança. Há atitudes negativas quanto à maioria dos profissionais de medicina, com exceção daqueles percebidos como humanizados. Observa-se que doulas estão construindo processos identitários ligados ao feminismo; e que o ativismo, o grupo de trabalho das doulas e a promoção de encontros com mulheres grávidas constituem estratégias de mudança social, contribuindo para a transformação da assistência à saúde e das relações de gênero. Palavras-chave: cuidado pré-natal; doulas; saúde reprodutiva; atitudes; feminismo; identidade social.
33
Kjellberg, Fredrik. "Passivhuset Lönsamhet : En jämförelse mellan konventionellt byggda hus och passivhus ur ett ekonomiskt perspektiv." Thesis, Mittuniversitetet, Institutionen för ekoteknik- och hållbart byggande, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-42695.
Full textAbstract:
Ett passivhus är en byggnad som passivt värms upp av återvunnen värme som kommer från ventilationssystem, solen samt interna värmevinster. En kostnadsökning för att bygga passivhus uppstår på grund av den tjocka isoleringen och högre kvalitet på fönstren. Forum för energieffektivt byggande (FEBY) har olika klassningar på passivhus, nämligen Guld, Silver och Brons. Hur byggnaden klassas beror bland annat på hur mycket levererad el som går åt till byggnaden för uppvärmning, varmvatten och fastighetsenergi. För att byggnaden ska nå de krav som krävs för ett passivhus krävs dock en merinvestering. Denna merinvestering brukar kunna ligga på allt mellan 2–9 % av grundpriset. Syftet med denna studie är att ta reda på om den extra kostnad som uppstår är försvarbar ur ett ekonomiskt perspektiv. Studien kommer att med offentliga data, elpriser från Statistiska Centralbyrån (SCB) och husmodeller från tre olika hustillverkare göra uträkningar. Uträkningarna visar kostnad på tillförd energi per år för ett konventionellt hus och ett passivhus. Studien fortsätter sedan med att beräkna avkastningstiden för respektive FEBY-kategori. Avkastningstiden hamnar mellan 8 – 68 år. Det stora spannet beror på typ av FEBY-klassning och storlek på investeringskostnad. Resultatet visar att det inte spelar någon större roll vilken typ av FEBY-kategori byggherren väljer att utgå ifrån. För samtliga husmodeller är investeringspåslaget för passivhuset den avgörande variabeln.A passive house is a building using recycled heat from a ventilation system, the sun and internal heat gains. A cost increase for building a passive house originates from the use of thicker insulation and better-quality windows. Forum for energy-efficient building (FEBY) has different classifications for low energy houses, namely Gold, Silver and Bronze. How the building is classified partly depends on how much delivered electricity is required for heating, tap water heat and real estate energy. For the building to reach the requirements there is additional investment needed. This additional investment is usually around 2-9 % of the base price. The purpose of this study is to find out if the investment that arises is defensible from an economical perspective. In the study, calculations using public data, electricity prices from Statistics Sweden (SCB) and house models from three different house manufacturers are used to find out the cost of annual added energy for a conventionally built house and a passive house. The calculations show the pay back-time for the respective FEBY category. The pay back-time ends up between 8-68 years. The big gap depends on the FEBY-classification used and the size of investment. Results show that the FEBY-classification chosen by the developer has no real impact. For every house model the surcharge for the passive house is the crucial variable.
Betyg 2021-06-04
34
Calikevstz, Viviane Regina. "“Categoria especial da sociedade”: estudo do patrimônio cultural e da representatividade social da Força Expedicionária Brasileira – FEB." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2017. http://tede2.uepg.br/jspui/handle/prefix/182.
Full textAbstract:
Made available in DSpace on 2017-07-21T14:29:21Z (GMT). No. of bitstreams: 1
Viviane Regina Calikevstz.pdf: 6253564 bytes, checksum: 108ab72fcfd01639814b82ce959ea894 (MD5)
Previous issue date: 2017-04-17The present thesis aims to show the representativeness of the social category of the Brazilian Expeditionary Force - FEB, as a special category of society. The time period in question dates from the decades of consolidation of the Regime do Estado Novo - from the 1930s to the present day, through pre and post World War II stages, showing how the category was built, its performance in the world conflict, its return home as heroes, its abandonment by the State and its materialization in the form of symbols throughout national territory. In the search for the confirmation of the hypothesis that it would be the category of the FEB and its members, living assets of society, which generated the question of the military heritage and its representativeness in the form of symbols. These being the FEB category itself, its monuments , museums, virtual memory spaces, private collections and memoirs of living veterans and individuals in general, cultural productions such as films, documentaries and books, created and developed for researchers, writers, filmmakers, admirers, family members and war veterans themselves. As an interdisciplinary research project, the approaches used included several humanistic chains, based on authors and the concepts of disciplines such as geography, history, sociology and arts, showing that the complexity of the theme and the hypotheses, which called for this large a range of scientific approaches. The research presents acceptable proof and conclusions, but is not fully closed, since the construction process itself, still ongoing, was the most evident element at work.
A presente tese tem como objetivo mostrar a representatividade da categoria social da Força Expedicionária Brasileira – FEB, enquanto uma categoria especial da sociedade. O recorte temporal de estudo parte das décadas de consolidação do Regime do Estado Novo – década de 30 até os dias atuais, passando pelo pré e pós Segunda Guerra Mundial, mostrando como se construiu a categoria, sua atuação no conflito mundial, seu regresso enquanto heróis, sua situação de abandono pelo Estado e sua materialização na forma de símbolos pelo território nacional. Na busca pela comprovação da hipótese de que seria a categoria da FEB e seus integrantes, patrimônios vivos da sociedade, partiu-se da problemática envolvendo o patrimônio militar e sua representatividade na forma de símbolos, ou seja, a própria categoria da FEB, seus monumentos, museus, espaços de memória, acervos particulares e memórias dos veteranos vivos e dos indivíduos em geral, produções culturais como filmes, documentários e livros, criados e desenvolvido por pesquisadores, escritores, cineastas, admiradores, familiares e os próprios veteranos de guerra. Enquanto uma pesquisa interdisciplinar, as abordagens passaram pela corrente humanística, pautando-se em autores e conceitos de disciplinas como geografia, história, semiótica, sociologia, artes, mostrando que a complexidade da temática e das hipóteses necessitava desse leque de enfoques científicos. A pesquisa apresenta comprovações aceitáveis, mas jamais finalizadas, visto que o processo de construção foi o elemento mais evidente no trabalho como um todo.
35
Izanlou, Afshin. "An Ab Initio Surface Study Of Feti For Hydrogen Storage Applications." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611010/index.pdf.
Full textAbstract:
In this study, the effect of surface crystallography on hydrogen molecule adsorption properties on FeTi surfaces is presented. Furthermore, the substitutional adsorption of 3d-transition metals on (001), (110) and (111) surfaces of FeTi is studied. Using ab initio pseudopotential methods, the adsorption energies of hydrogen and 3d-transition metals are calculated. In substitutional adsorption of 3d-transition metals, Fe-terminated (111) and Ti-terminated (001) surfaces, are found to express the lowest adsorption energies. The adsorption energy versus adsorbed elements&rsquocurves are very alike for all the surfaces. According to this, going from the left to right of periodic table, the adsorption energies increase first. The maximum energy belongs to Cr, Mn and Fe for all the surfaces. Then a minimum is observed in Co for all the surfaces and after that the energy increases again. Adsorption energies of atomic and molecular hydrogen are calculated on high symmetry sites of surfaces. As a result, top and bridge sites came out to be the most stable positions for molecular and atomic hydrogen adsorption, respectively, for (001) and (111) surfaces in all terminations. In (110) surface
however, 3-fold (Ti-Ti)L-Fe and 3-fold (Ti-Ti)S-Fe hollow sites express the lowest adsorption energies for molecular and atomic hydrogen, respectively. Considering the minimum adsorption energy sites for hydrogen molecule and atom, a path of dissociation of hydrogen molecule on surfaces is represented. After that by fully relaxing the hydrogen molecule on the surface and using CI-NEB method the activation energy for hydrogen dissociation is calculated. So it has been found that on Fe-terminated (111) and FeTi (110) surfaces the dissociation of hydrogen molecule happens without activation energy. Meanwhile, the activation energy for Fe-terminated (001) surface and Ti-terminated (001) surface, is calculated to be 0.178 and 0.190 eV, respectively.
36
Bonder, M. J. "Magnetic and structural properties of nitrided Fe and FeTi thin films." Thesis, University of Salford, 2001. http://usir.salford.ac.uk/2087/.
Full textAbstract:
This thesis investigates the magnetic and structural properties of Fe and Fe$STi1s thin films nitrided using a nitrogen atom source. In this novel technique, the atom source produces an atomic nitrogen beam for which multilayer samples with bilayers of the form Fe/FeN or FeTi/FeTiN were synthesized by varying the thickness of the Fe or FeTi exposed to the nitrogen beam. The samples studied here are all in the as-deposited state. X-Ray reflectivity confirms the presence of a multilayer structure showing sharp multilayer peaks indicative of good quality interfaces. The electron diffraction data shows a variation of nitride phases as the thickness of the Fe layer was varied. Fe2N was present when the bilayer was 7A thick. Increasing the bilayer thickness led to a bilayer consisting of two different nitride phases until the Fe layer was 42A thick and the bilayer consisted of a-Fe and Fe4N. In contrast, when Ti was present the phase was body centred cubic for all but the thinnest bilayers considered in this thesis. The grain structure of the two systems was also quite different. The Fe/FeN grain sizes ranged from 50 to 1000A in diameter as the bilayer was varied. In the FeTi/FeTiN sample set the grain growth was inhibited with no noticeable increase with nitriding. Despite these structural differences the magnetic character of the two series of samples were consistent. The samples ranged from nonferromagnetic to ferromagnetic with the presence of weak perpendicular anisotropy occurring as the bilayer thickness increased. As the bilayer thickness was increased there was an asymptotic approach of the magnetization to the level of the unexposed materials. The presence of the perpendicular anisotropy was maintained for a larger parameter space. In both series the anisotropy is attributed to stress induced by the substrate. Nitriding Fe and FeTi using the aforementioned technique provides a controlled and viable way to alter the magnetic and structural properties.
37
Pisharody, Sandhya. "A shape analysis approach to prediction of bone stiffness using FEXI." Thesis, University of Hull, 2007. http://hydra.hull.ac.uk/resources/hull:2685.
Full textAbstract:
The preferred method of assessing the risk of an osteoporosis related fracture is currently a measure of bone mineral density (BMD) by dual energy X-ray absorptiometry (DXA). However, other factors contribute to the overall risk of fracture, including anatomical geometry and the spatial distribution of bone. Finite element analysis can be performed in both two and three dimensions, and predicts the deformation or induced stress when a load is applied to a structure (such as a bone) of defined material composition and shape. The simulation of a mechanical compression test provides a measure of whole bone stiffness (N mm−1). A simulation system was developed to study the sensitivity of BMD, 3D and 2D finite element analysis to variations in geometric parameters of a virtual proximal femur model. This study demonstrated that 3D FE and 2D FE (FEXI) were significantly more sensitive to the anatomical shape and composition of the proximal femur than conventional BMD. The simulation approach helped to analyse and understand how variations in geometric parameters affect the stiffness and hence strength of a bone susceptible to osteoporotic fracture. Originally, the FEXI technique modelled the femur as a thin plate model of an assumed constant depth for finite element analysis (FEA). A better prediction of tissue depth across the bone, based on its geometry, was required to provide a more accurate model for FEA. A shape template was developed for the proximal femur to provide this information for the 3D FE analysis. Geometric morphometric techniques were used to procure and analyse shape information from a set of CT scans of excised human femora. Generalized Procrustes Analysis and Thin Plate Splines were employed to analyse the data and generate a shape template for the proximal femur. 2D Offset and Depth maps generated from the training set data were then combined to model the three-dimensional shape of the bone. The template was used to predict the three-dimensional bone shape from a 2D image of the proximal femur procured through a DXA scan. The error in the predicted 3D shape was measured as the difference in predicted and actual depths at each pixel. The mean error in predicted depths was found to be 1.7mm compared to an average bone depth of 34mm. 3D FEXI analysis on the predicted 3D bone along with 2D FEXI for a stance loading condition and BMD measurement were performed based on 2D radiographic projections of the CT scans and compared to bone stiffness results obtained from finite element analysis of the original 3D CT scans. 3D FEXI provided a significantly higher correlation (R2 = 0.85) with conventional CT derived 3D finite element analysis than achieved with both BMD (R2 = 0.52) and 2D FEXI (R2 = 0.44).
38
OLIVEIRA, Murilo Marinello Assis de. "Propriedades físicas da emissão de FeII em núcleos ativos de galáxias." reponame:Repositório Institucional da UNIFEI, 2015. http://repositorio.unifei.edu.br:8080/xmlui/handle/123456789/185.
Full textAbstract:
Submitted by repositorio repositorio (repositorio@unifei.edu.br) on 2015-11-25T12:30:17Z
No. of bitstreams: 1
dissertacao_oliveira2_2015.pdf: 2098885 bytes, checksum: cf6b676a49fa6e0ab204d6035ec8de76 (MD5)Made available in DSpace on 2015-11-25T12:30:17Z (GMT). No. of bitstreams: 1 dissertacao_oliveira2_2015.pdf: 2098885 bytes, checksum: cf6b676a49fa6e0ab204d6035ec8de76 (MD5) Previous issue date: 2015-02
Apresentamos, pela primeira vez, um estudo da emissão de Fe II na região do infravermelho próximo (NIR) em uma amostra de 25 núcleos ativos de galáxias (AGN) com o objetivo de obter informações sobre a física desta emissão, particularmente sobre os mecanismos de excitação e a localização mais provável da sua região de formação. Para a análise da emissão de Fe II foi utilizado o template desenvolvido por Garcia-Rissmann et al. (2012), que foi convoluído em FWHM e escalonado em fluxo para cada objeto da amostra. O template se mostrou eficiente na modelagem e subtração da emissão de Fe II na NIR, particularmente para as região das linhas de 1 μm, sugerindo a existência de um mecanismo de excitação dominante a todos os objetos da amostra. A presença do bump de Fe II em λ9200 foi observada em toda a amostra confirmando a presença do processo de fluorescência de Lyα em AGNs. Foi encontrada uma forte correlação entre a emissão do bump de λ9200, as linhas de 1 μm e a emissão óptica de Fe II, indicando que o processo de fluorescência de Lyα é um mecanismo importante na produção de Fe II em AGNs. Utilizando os resultados acima e os fluxos medidos de Fe II foi estimado um limite inferior para a contribuição do processo de flourescência de Lyα na produção de Fe II no óptico. Os resultados mostram que cerca de 18% dos fótons observados no óptico são produzidos por esse processo. Foram comparados os perfis das linhas de Fe II λ10502, O I λ11287, Ca II λ8664 e Paβ λ12812 a fim de obter informações sobre a região de formação destes íons. Os resultados mostram que as linhas de Fe II, O I e Ca II possuem larguras similares e em média 30% mais estreitas que as Paβ. Isto significa que as três primeiras são formadas em uma mesma região, mais externa à aquela onde é produzida as linhas de Hidrogênio. Supondo que o movimento das nuvens emissoras dessas linhas é virializado, os resultados obtidos neste trabalho mostram que o Fe II (bem como o O I e o Ca II) é produzido em uma região, em média, duas vezes mais distante da fonte central que Paβ. As distâncias encontradas para a regiões emissoras de Fe II variam com grande amplitude: de 8,5 dias-luz para NGC4051 até 198,2 dias-luz para Mrk 509. Os resultados derivados deste estudo ressaltam a importância do estudo do Fe II na NIR para vincular parâmetros fundamentais da física deste íon.
39
Patel, Merul. "Magnetotransport in magnetic multilayers : a study of FeNi/Cu/Co trilayers." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/251735.
Full text
40
Ho, Chin-jun, and 何金潤. "Magnetic and Thermal Properties of Molecular Magnet [FeII(Δ)FeII(Λ)(ox)2(Phen)2]n." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/q5d9h4.
Full textAbstract:
碩士國立中山大學
物理學系研究所
95
The molecular magnet [FeII(Δ)FeII(Λ)(ox)2(Phen)2]n, whose chemical formula is C28H16Fe2N4O8 for unity, has been studied by magnetization measurements, neutron diffraction, and field-dependent specific heat. From the magnetization measurements, the quasi-ferrimagnetic behavior at T>Tm region can be well described with alternating Landé factors within 1D Ising chain model. However, in T
41
"Phase and microstructure of FeSi₂ thin films." 2006. http://library.cuhk.edu.hk/record=b5892816.
Full textAbstract:
Chong Yuen Tung = 硅化鐵薄膜的相和微觀結構 / 莊宛曈.Thesis (M.Phil.)--Chinese University of Hong Kong, 2006.
Includes bibliographical references (leaves 63-65).
Text in English; abstracts in English and Chinese.
Chong Yuen Tung = Gui hua tie bo mo de xiang he wei guan jie gou / Zhuang Wantong.
Abstract --- p.i
摘要 --- p.ii
Acknowledgment --- p.iii
Table of contents --- p.iv
List of Figures --- p.viii
List of Tables --- p.x
Chapter CHAPTER 1: --- Introduction --- p.1
Chapter CHAPTER 2: --- Background --- p.4
Chapter 2.1 --- Phases of crystalline FeSi2 --- p.4
Chapter 2.2 --- Electronic structure of β-FeSi2 --- p.7
Chapter 2.3 --- Orientation relationship between β-FeSi2 and Si --- p.8
Chapter CHAPTER 3: --- Instrumentation --- p.10
Chapter 3.1 --- Metal vapor vacuum arc ion source implantation --- p.10
Chapter 3.2 --- Rutherford backscattering --- p.12
Chapter 3.3 --- Transmission Electron Microscopy (TEM) --- p.13
Chapter 3.3.1 --- Principles of TEM --- p.13
Chapter 3.3.2 --- Electron specimen interaction and contrast --- p.14
Chapter 3.3.3 --- Electron Diffraction --- p.15
Chapter 3.3.4 --- Sample Preparation --- p.17
Chapter 3.3.4.1 --- Plan-view sample --- p.17
Chapter 3.3.4.2 --- Cross-section sample --- p.17
Chapter CHAPTER 4: --- FeSi2 films fabricated by ion implantation --- p.18
Chapter 4.1 --- Introduction --- p.18
Chapter 4.2 --- Experimental details --- p.18
Chapter 4.3 --- Ion energy series --- p.19
Chapter 4.3.1 --- As-implanted sample --- p.19
Chapter 4.3.1.1 --- Results --- p.20
Chapter 4.3.1.2 --- Discussions --- p.20
Chapter 4.3.2 --- Annealed samples --- p.24
Chapter 4.3.2.1 --- Morphology of the annealed samples and the damage on Si substrate --- p.24
Chapter 4.3.2.2 --- Identification of the FeSi2 phase and their orientation relationship with the Si matrix --- p.24
Chapter 4.3.2.3 --- Photoluminescence of the samples --- p.26
Chapter 4.3.2.4 --- Discussions --- p.26
Chapter 4.4 --- Ion dosage series --- p.31
Chapter 4.4.1 --- Results --- p.31
Chapter 4.4.2 --- Discussions --- p.32
Chapter 4.5 --- Summary --- p.36
Chapter CHAPTER 5: --- Effect of post annealing on the phase and microstructure of FeSi2 --- p.37
Chapter 5.1 --- Introduction --- p.37
Chapter 5.2 --- Experimental details --- p.37
Chapter 5.3 --- The correlation between microstructure of FeSi2 synthesized under different annealing conditions and their PL --- p.38
Chapter 5.3.1 --- RTA series --- p.38
Chapter 5.3.1.1 --- Results --- p.38
Chapter 5.3.1.2 --- Discussions --- p.39
Chapter 5.3.2 --- FA series --- p.42
Chapter 5.3.2.1 --- Results --- p.42
Chapter 5.3.2.2 --- Discussions --- p.44
Chapter 5.3.3 --- RTAFA series --- p.45
Chapter 5.3.3.1 --- Results --- p.45
Chapter 5.3.3.2 --- Discussions --- p.45
Chapter 5.4 --- The existence of alpha phase and its special shape --- p.51
Chapter 5.4.1 --- Results --- p.51
Chapter 5.4.2 --- Discussions --- p.52
Chapter 5.5 --- The existence of gamma phase in 1050°C furnace annealed sample
Chapter 5.5.1 --- Results --- p.56
Chapter 5.5.2 --- Discussions --- p.57
Chapter 5.6 --- Summary --- p.59
Chapter CHAPTER 6: --- Conclusions --- p.61
References --- p.63
42
Gavi, H. M. (Happyson Michael). "Low-field microwave absorption in pulsed lased deposited FeSi thin films." Diss., 2012. http://hdl.handle.net/2263/25883.
Full textAbstract:
The magnetic behavior of cubic B20 crystal structure FeSi thin film has been previously probed at macroscopic level using a magnetometer. The results revealed ferromagnetic state with significant hysteresis. This is contrary to the bulk with the same cubic B20 crystal structure that is paramagnetic. The origin of ferromagnetism in thin films in contrast to paramagnetism in the bulk is unclear and unexplained. Electron spin resonance technique (ESR) was used as a tool to characterize the magnetic behavior of FeSi thin films at microscopic level. With ESR technique, B20 crystalline FeSi show microwave power absorption centred at zero field (HDC = 0) termed low-field microwave absorption (LFA) in addition to usual ferromagnetic resonance (FMR) typical of magnetic materials. LFA was observed as a distinct signal in these films. This signal has been observed in several other materials other than FeSi thin films. However in FeSi thin films it was for the first time that LFA signal was observed. The LFA is closely connected to the magnetization process that occurs at low applied field. LFA is a new technique that has recently been used to detect the magnetic transition in materials, sensitive detection of magnetic order and more importantly to distinguish between different dynamics of microwave absorption centres. The LFA measurements were made at 9.4 GHz (X-band) on pulse laser deposited (PLD) polycrystalline B20 cubic structure FeSi thin film grown on Si (111) substrate. PLD is regarded as a powerful tool for thin film growth. The LFA properties of the films were investigated as a function of DC field, temperature, microwave power and orientation of DC field with respect to the film surface. The LFA signal is very strong when the DC field is parallel to the film surface and diminishes at higher angles. This is attributed to induced anisotropy field (IAF) and surface anisotropy field (SAF) contributing to total anisotropy field (TAF). The LFA signal strength increases as the microwave power is increased, such increase is due to impedance and thus showing that LFA and magnetoimpedance (MI) has common origin. The LFA signal disappears around 340 K which can be attributed to the disappearance of long range order giving us a positive signature of surviving magnetic state well above room temperature in these films. We believe that domain structure evolution in low-fields, which in turn modifies the low field permeability as well as the anisotropy, could be the origin of LFA observed in these films. MI and LFA can be understood as the absorption of electromagnetic radiation by spin systems that are modified by domain configuration and strongly depend on anisotropy field. The observation of LFA opens the possibility of FeSi films to be used as potential candidates of low magnetic field sensors in the microwave and radio frequency regions. CopyrightDissertation (MSc)--University of Pretoria, 2012.
Physics
unrestricted
43
Jr-Feng, Hua. "Fei bao zi chong fei yan yu fei jie he zai man xing ke sou bing ren zhong de xiang guan xing /." 2003. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0007-1704200714513287.
Full text
44
Hsiao, Kun-Chin, and 蕭坤進. "A Study about Fei-hsing Fei-tso Samādhi from the Viewpoint of Bodhisattva-caryā." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/31638008793362257146.
Full textAbstract:
碩士華梵大學
東方人文思想研究所
95
A Study about Fei-hsing Fei-tso Samādhi from the Viewpoint of Bodhisattva-caryā Summary “Fei-hsing Fei-tso Samādhi” means “Samādhi Practices in All Terms”, correctly practices Buddha-teaching in all terms. We know Buddha dharma study is not in the ivory tower. We study pitakas, theories, and track laws. By the way, we progress with founder's compassion, virtues, and arise our bodhi-citta. To correctly practices Buddha-teaching in all terms in daily life, that is “Fei-hsing Fei-tso Samādhi”. In the learning process, we remove oneself afflictions, and share one's own gains to other people. It profits us and other people, and practice Bodhisattvas’ oath, and popularize Buddha dharma. I describe my viewpoint by six chapters. In chapter one, I introduce the study’s thesis, research state, method, and structure. And, I retrospect scientific studies and examples in this chapter. Then, I try to conclude summarizes in chapter six. Other outlines of four chapters besides chapter one and chapter six are as follows. Mo-ho chih-kuan is the main reference in chapter two. Four kinds of samādhi practice are introduced in Mo-ho chih-kuan. “Fei-hsing Fei-tso samādhi” is one of four. It is introduced by a more macroscopic viewpoint. For example, I-hsin san-kuan” is to complete three views in the first mind, and to remove one’s afflictions. The maintenance of unscathed mindfulness in formal meditation, and bodhi-citta is arised and compassion. Ssu-yün-hsin watches intently a mind for four stages. It can help us practice Six Pāramitās in life, hold for bodhi-citta. By the all, arrive the aim that abolish dharma-grāha and adhimāna, and don’t be in the two vehicles (śrāvaka and pratyekabuddha). Chapter three discuss about “Fei-hsing Fei-tso samādhi” and “Ssu-an-yüeh-hsing”. First, Ssu-an-yüeh-hsing for the four view of bodily actions, speech, thought, and vow in a correct path.To follow it can make the person smooth, stable peacefully and comfortably, produce the happiness, and not swayed by worried heart. Keep away from the agony and perplex. Reduce the growing of negative or incorrect ideas, and evil thought. Then, make the body and mind corresponding, be unified. It is better for “Fei-hsing Fei-tso samādhi”. Last, I try to list some similarities and differences between “Fei-hsing Fei-tso samādhi” and “Ssu-an-yüeh-hsing”. Chapter four discuss about “Fei-hsing Fei-tso samādhi” and “Nan-tsung-ch'an”. “Fei-hsing Fei-tso samādhi” like a pioneer for the idea that budda-truth appearances in daily life. First, I talk about Master Hui-neng’s viewpoints of wu-nien, wu-chu, wu-hsiang, chih-hsing, and i-hsing san-mei. Second, discuss about Master Hung-chih (cheng-chiao )’s viewpoints of mo-chao-ch'an. Last, I try to list some similarities and differences between “Fei-hsing Fei-tso samādhi” and “Nan-tsung-ch'an”. And, I try to discuss the relationshipa between “Fei-hsing Fei-tso samādhi” and “Nan-tsung-ch'an”. I think it is better for both sides. Chapter five discuss about “Fei-hsing Fei-tso samādhi” and “contemporary care”. Psychology consults are produced out of the reasons of people are busy to live, working pressure is great in the industrial and commercial society at present. Buddhism organizations push a lot of actions for the needs. DDM’s t'ung-ch'an is an example. First in the chapter, discuss about the psychology communicate and analyse school's ABCP theory. Second, discuss about the DDM’s t'ung-ch'an. Last, discuss about the relationships, similarities and differences between “Fei-hsing Fei-tso samādhi” and “contemporary care”. I try to understand that helps of “Fei-hsing Fei-tso samādhi” for contemporary needs. Maybe, it match for modern people, help them reduce suffering, and take care their minds and bodies.
45
Cheng, Ya-yi, and 鄭雅憶. "Preparation and Characterization of Si and FeSi Nanoparticles." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/77069688543218822155.
Full textAbstract:
碩士國立成功大學
化學工程學系碩博士班
97
This thesis concerns the preparation of milled Si nanoparticles, heat-treated Si nanoparticles, and FeSi nanoparticles which own magnetic and optical properties simultaneously via thermal decomposition method. The effects of preparation conditions on the particle size, structure, composition, optical and magnetic properties were investigated. Milled Si nanoparticles were prepared by grinding with the beads of yttrium stabilized ZrO2 in enthanol and separated by the centrifuge. In order to estimate the effects on the pure Si nanoparticles from the thermal decomposition system, milled Si nanoparticles were heat-treated in the solution of dioctyl ether, stabilizers oleic acid and oleylamine. It was found that milled Si nanaparticles had irregular shape with a diameter of 4.2±1.6 nm and that the heat-treated ones were spherical with a larger diameter of 10.2±4.4 nm. Both they preserved the great monodispersion. Their structure, composition, morphology were characterized by the analyses of HRTEM, XRD and Raman scattering. These results revealed that the milled Si nanoparticles had the body-centered cubic structure, not only diamond structure like the bulk Si anymore. The stress from milling and the small size would reduce their crystallinity. After the heat treatment, the atoms of the milled Si nanoparticle would rearrange in the interior, and even combine with each other to form the better poly-crystalline Si nanopartcles. The ESCA analysis of milled Si and heat-treated Si nanoparticles exhibited the almost similar Si-Si binding energy despite a little increase from heat-treated one. The FTIR results indicated that there was a film consisted of SiO2 and ethanol molecules on the surface to prevent it from oxidation, and also proved there were not any stabilizers left on the surface of heat-treated Si nanoparticles. Moreover, when giving the specific wavelength of excitation, the specific PL spectra for the milled Si nanoparticles could be observed, so did heat-treated Si nanoparticles. The optical images and properties were also revealed from optical microscopy, the powder-PL analysis and the UV-vis spectrometer. FeSi nanoparticles were synthesized via thermal decomposition of iron pentacarbonyl in the solution of dioctyl ether, stabilizers oleic acid and oleylamine. The TEM images showed that FeSi nanoparticles had cubic shape, but it seemed that the composition was not uniform. According to the EDS results, the Fe:Si ratio of gray-uniform nanopaiticles was almost 1:1, and blacker FeSi nanoparticles contained more Fe atoms. Although FeSi didn’t have uniform structure, it still could be proved that the incorporation of Fe and Si existed in a single nanoparticle. All possible structure, lattice, binding, morphology, surface condition would be discussed. These results indicated that perhaps FeSi2 was the main structure of the new products; however, due to incompletely combination and less synthesized time, it might still contain some part of Si and Fe structure. Besides, FeSi nanoparticles preserved the optical properties from Si atoms, but the PL intensity was much lower. The maxima PL peak appeared at 388 nm with the excitation at 300 nm. Their saturation magnetization (Ms), remanent magnetization (Mr) and coercivity (Hc) were measured by the SQUID, exhibiting their nearly superparamagnetic behavior.
46
Lu, Chi-kang, and 劉季綱. "Han fei and classical political." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/50448554631390876462.
Full textAbstract:
碩士華梵大學
哲學系碩士班
96
Abstract The thesis tries to take “political life” as hermeneutic way to re-acknowledge the classical Chinese philosophy of politics. What political life is concerned in: what is the just domination? Well-advised domination and how should I live? As these ideas, this thesis will not totally emphasize the idea in Han Fei-Tzu by talking about his points of metaphysic, epistemology, ethics, theory of state, jurisprudence and his background. But the question is concerned in this thesis will be located on the issue as follows: what is the just order in politic? What is the right regime? How should we acknowledge order? We could find out that this is not every nation owning philosophy, conscious of history or faith in religion. But we could make sure that human kind is social animal. Since human kind is living in groups, they must have their own national style to live and “political life ". Base on this hermeneutic way, the thesis try to expose the classical political situation in China, therefore; so as to make discourses in Chinese politics itself. “Hermeneutic of Regime” make us to concern deeply the wisdom which the ancestors have in their political life in practice. It also reflects the reflection on phenomena of politic. The hermeneutic of Regime offers another way to think about in political life. It concerning about how people trust politics. And this is an eternal problem we face in nature.
47
Siang, Wu-Yi, and 吳益祥. "Han Fei''s Governance arts." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/hhmv3k.
Full textAbstract:
碩士銘傳大學
應用中國文學系碩士班
97
Summary The Legalist is pre-Qin one of the important school of thoughts, Governance reforms contained in the ideology and practice of a tendency, Han Fei is one of a combination of different opinions are; Han Fei absorption Confucianism, Taoism, Mo, Fa and other various theories, In the understanding of human nature and the historical development of the basis of inspection, To create its own unique rule theory; His theory by the law, techniques, and powerful three essential components of future generations of far-reaching impact. Its hold law norms advocated objective system; Advocate the use of surgery to a Royal million, attention to psychological detectors; its Office powerful advocate to the high line with unparalleled magic, To enable people to receive services in the magic under the, In particular its system will be put into action the design, Particularly its research significance. Governance Thought in Ancient China and profound, Han Fei of China before the Qin Dynasty who Legalists expression of ideas, In his life that the war era disputes, In particular, the importance of governance, Was out with a whole series of constructive art of governance, Han Fei governance theory built on the basis of Chinese culture, therefore, Han Fei''s historical development, human advantage theory and meritocratic, non-elite, and the reactive talent and the rule of law, potential surgery theory, For us today, management, leadership and management of scientific theory research practice management systems, management models, establish a personnel system, etc. Still has a certain role and learn the meaning of inspiration. Key words: Han Fei, Governance arts, management, personnel
48
"Optical properties and microstructures of β-FeSi₂ in silicon." Thesis, 2008. http://library.cuhk.edu.hk/record=b6074667.
Full textAbstract:
A metal-oxide-silicon (MOS) tunneling diode is utilized to embed beta-FeSi 2 precipitates and give strong 1.5 tam electroluminescence at 80 K. And this simple MOS structure with beta-FeSi2 was fabricated by Fe ion implantation and rapid thermal oxidation (RTO) at 900°C, which is fully compatible with ultra-large scale integration (ULSI) processes.beta-FeSi2 precipitates are also incorporated into a silicon-on-insulator (SOI) rib waveguide and a p+-i-n+ photodetector is monolithically integrated with this SOI rib waveguide. The photoresponse to 1550 nm laser of beta-FeSi2 precipitates was observed and compared to intrinsic silicon.
Beta-phase iron disilicide (beta-FeSi2) is a semiconductor that can act as a light emitting material at the wavelength of 1.55 mum and can also be grown epitaxially on Si substrates. In this thesis, Fe ion implantation into silicon using a metal vapor vacuum arc (MEVVA) ion source was performed to synthesize nano-scale beta-FeSi2 precipitates in silicon matrix. The implantation was performed at ∼-120°C and the effects of silicon substrate and conditions for the following thermal annealing on luminescence properties were studied. The samples were characterized by employing various analytical techniques including Rutherford backscattering spectrometry (RBS), transmission electron microscopy (TEM), atomic force microscope (AFM), photoluminescence (PL), and electroluminescence (EL).
It is found that the PL intensity is optimized in p-100 silicon substrates (with the resistivity of 15-25 O·cm) using Fe ion implantation at a voltage of 80 kV and dosage of 5x1015 cm -2. Formation of beta-FeSi2 can be completed after rapid thermal annealing (RTA) and strong photoluminescence is present. We also found that RTA could maintain the strain in beta-FeSi2 precipitates and there exists an epitaxial relationship between beta-FeSi2 and silicon. Additional furnace annealing at 850°C can relax the strain in beta-FeSi2 precipitates.
The development of both modern microelectronics and lightwave technologies has enabled the establishment of the Internet which has introduced a profound change in our everyday lives. Because of Moore's law, computing today is limited less by the computation ability of microprocessors than by the rate at which the processor can communicate with the outside world. Lightwave technology has had many successes in the long-haul communication field over the past decade. The advantages of lightwave technology over conventional electronics are becoming apparent for shorter and shorter reach applications and lightwave communications may eventually replace copper-based interconnects in microelectronics. To make possible optical interconnects, optical components, especially light emitters may be needed to be integrated on conventional silicon microchips. However, to date, no efficient on-chip silicon-based light emitter is fabricated in silicon photonics.
Sun, Caiming.
Adviser: Hon K. Tsang.
Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3703.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2008.
Includes bibliographical references.
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstracts in English and Chinese.
School code: 1307.
49
Zhuang, Yuan-Cheng, and 莊沅澄. "Electrical and thermal transport properties of Co substituted FeSi." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/55331860637038004595.
Full textAbstract:
碩士國立東華大學
物理學系
104
We carried out the electrical resistivity, Seebeck coefficient, and thermal conductivity measurements on the Fe1-xCoxSi single crystals with 0 ≤ x ≤ 1, to examine the influence of Co substitution on thermoelectric properties of FeSi. In the resistivity data, it is noticed that FeSi undergoes the metal-insulator transition upon the substitution of Co onto Fe sites. Interestingly, it was observed that the resistivity of lightly Co-doped samples (x = 0.1, 0.3) have an upturn at the low temperatures which may be attributed to positive magnetoresistance. The pristine FeSi has a giant peak in S(T) at T ~ 45 K due to phonon drag effect, which was found to be suppressed on Co substitution. Besides, FeSi shows p-type thermoelectric transport, while the Fe0.9Co0.1Si, Fe0.7Co0.3Si, and CoSi compounds have the n-type conduction. Such an observations in S(T) have been associated with the modification of density of states at Fermi level. A theoretical analysis of thermal conductivity indicates that the lattice phonons are responsible for the heat conduction. The low-temperature thermal conductivity of FeSi has a strong influence as a result of Co substitution via point defect scattering and grain boundary scattering.
50
Zhang, Ming-Xun, and 張明勳. "The study of ion implantation in FeSi/Si system." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/04246165150622545703.
Full text