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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Élaboration d'un matériau composite multifonctionnel : matériau structural intégrant la fonction de blindage pour protéger des menaces de type "petits fragments" / Elaboration of a multifunctional composite material : structural material integrating the shielding protection function against "small fragments" type threats

Escalé, Laurent 17 December 2013 (has links)
Le fuselage des avions de nouvelle génération fera de plus en plus appel aux matériaux composites à matrice organique qui présentent des propriétés spécifiques particulièrement intéressantes. Or les structures aéronautiques sont exposées à de nombreuses exigences et en particulier à celle induite par l'impact de "petits fragments" à haute énergie. Le non percement du fuselage nécessite donc d'adjoindre une fonction de blindage à sa fonction habituelle de tenue mécanique. Par rapport à cette problématique, une approche avec intégration de fonction a été adoptée et a mené au développement d'un matériau composite multifonctionnel dans le cadre de ce travail de recherche. L'étude du comportement sous impact à basse vitesse (essais Charpy) et à haute vitesse (essais au canon à gaz) de composites à matrice organique aéronautiques courants et plus spécifiques au blindage a d'abord été réalisée. Cette étude a permis d'établir le lien entre les constituants des matériaux et les différents modes d'absorption de l'énergie d'impact. Plusieurs paramètres ont été discriminés : nature de la matrice (thermodurcissable - thermoplastique), nature de la fibre (minérale - organique), architecture du renfort (UD - tissée - tricotée), taux de porosité intra-mèche, apport d'éléments spécifiques aux inter-plis. Plusieurs concepts de multimatériaux sont ensuite proposés. Ils ont été définis à partir de combinaisons des différents comportements observés sur matériaux élémentaires et sont basés sur différents scénarii d'endommagement. Ils ont été testés à haute vitesse d'impact. Les observations révèlent une aptitude particulière de la fibre de polypara-phénylène-2,6-benzobisoxazole (PBO) à absorber une grande quantité d'énergie par déformation inélastique, notamment lorsqu'elle est faiblement imprégnée. / Next generation aircraft fuselage will increasingly use polymer matrix composites that exhibit interesting specific properties. Aeronautical structures are exposed to many requirements and amongst them to that induced by the impact of high energy "small fragments". In order to avoid fuselage break through, an armour function has to be added to its usual mechanical function. With respect to this issue, an approach aiming the integration of such function was adopted and led to the development of a multifunctional composite material within this research work. The study of the behaviour under low speed (Charpy tests) and high speed (gas gun tests) impact of common and more specific organic matrix composites dedicated to armour was first performed. This study allowed establishing the link between the material components and the various modes of the impact energy absorption. Several parameters were discriminated: matrix type (thermosetting - thermoplastic), fibre type (mineral - organic), reinforcement architecture (UD - woven - knitted), intra-mesh porosity level, addition of specific inter-ply elements. Several concepts of multimaterials were then proposed. They were defined from combinations of various behaviours observed in the basic materials and are based on different damaging scenarios. They were tested under high speed impact. The observations show a particular aptitude of the polyparaphenylene-2,6-benzobisoxazole (PBO) fibre to absorb a large amount of energy by inelastic deformation, especially when it is poorly impregnated.
22

Trestný čin dotačního podvodu podle § 212 trestního zákoníku a poškození finančních zájmů Evropské unie (§ 260 tr. zák.) / Subsidy fraud and damaging the financial interests of the European union (Section 260 of the Penal Code)

Roušar, Ladislav January 2020 (has links)
Subsidy fraud and damaging the financial interests of the European union (Section 260 of the Penal Code) Abstract This thesis is focused on Czech and European legal framework of fight against subsidy fraud. The thesis also focuses on practices and general concepts of institutions which are tasked with fighting fraudulent conducts. The method of processing is mainly analysis and description. The thesis is structured in three parts. The first part brings attention to the characteristics of subsidy fraud as codified in section 212 of the Czech penal code. The chapter includes authors' suggestions of changes to the section 212. The second part presents analysis of crime of damaging the financial interests of the European union as codified in section 260 of the Czech penal code. The chapter includes authors' suggestions of changes to the section 260. After that international and European legal framework, which represents foundation of Czech legal framework, is thoroughly observed. The thesis explores the history of fight against fraud in the European union and its predecessors from the beginning to current days. Further attention is brought on European institutions tasked with fight against fraud, specifically European Public Prosecutor's Office and European Anti-Fraud Office. Possible weaknesses in the concept...
23

Trestný čin dotačního podvodu podle § 212 trestního zákoníku a poškození finančních zájmů Evropské unie (§ 260 tr. zák.) / Subsidy fraud and damaging the financial interests of the European union (Section 260 of the Penal Code)

Nedvědová, Marie January 2019 (has links)
1 Subsidy fraud and damaging the financial interests of the European union Abstract The thesis deals mainly with the definition and punishment of subsidy frauds within the framework of criminal law. At the same time, it also addresses some issues related to this crime, in particular the subsidiarity of criminal sanctions and the concurrence of this crime with other crimes such as the offense of damaging the financial intereststhe of the European union. The method of processing is mainly deduction and analysis, in the relevant parts induction, synthesis and comparison. The thesis is divided into three main parts. First, it deals with subsidies and subsidy fraud, explaining what a subsidy is and what action can be considered a subsidy fraud, and also clarifies some of the institutes associated with these terms, including budget rules, resources, and records. It also deals with what actions are associated with the crime of subsidy fraud. Thus, in the case of a subsidy fraud, it deals with its characteristics, its relation to other provisions of the Penal Code, the investigation and the imposition of punishment. In the next part, the thesis deals with the protection of the financial interests of the European Union, especially with the institutions and bodies, which are particularly focused at the protection of...
24

Development and Validation of the Expectancies for Body-Focused Coping Questionnaire

Forbes, Courtney N. 04 September 2019 (has links)
No description available.
25

Chemically Induced DNA Damage in Extended-term Cultures of Human Lymphocytes

Andersson, Maria January 2006 (has links)
<p>Generation of DNA damage is regarded to be an important initial event in the development cancer. Consequently, a battery of tests have been developed to detect different types of genotoxic effects in order to be able to predict the potential genotoxicity and mutagenicity of chemicals, including both pharmaceutical drugs and various types of environmental and occupational agents, as well as dietary factors. The aim of this thesis was to evaluate whether the combination of the comet assay and the extended-term cultures of human lymphocytes (ETC) can be used as an alternative <i>in vitro</i> system to more commonly used transformed mammalian cell lines, and primary cell cultures from humans, when testing the potential genotoxicity of chemicals. </p><p>Using the comet assay, a panel of reference compounds showed that the ETC were found to detect the DNA-damaging effects with no remarkable difference to what has been reported in other cell types. Moreover, in comparison with a well-established rodent cell line, the mouse lymphoma L5178Y cells, the ETC showed similar sensitivity to the DNA damaging effects of the genotoxic agents hydrogen peroxide and catechol. Although there was an interindividual variation in induced DNA damage and the subsequent repair when using ETC from different blood donors, it did not seem to be of crucial importance for the identification of DNA-damaging agents. The demonstrated difference in sensitivity to catechol-induced DNA damage between freshly isolated peripheral lymphocytes and ETC may very well be due to their different proliferative status but despite this difference, both <i>in vitro</i> systems were able to identify catechol as a DNA-damaging agent at the same concentration.</p><p>Based on these results, it is proposed that the ETC and the comet assay are a useful combination when testing for the potential DNA damaging effects of chemicals. Representing easily cultivated cells possessing the normal human karyotype, where one blood sample can be used for numerous experiments performed over a long time, extended-term cultures appear to be a useful alternative, both to transformed mammalian cell lines, and primary cell cultures from humans. In fact, the extended-term lymphocytes, with or without S9 and/or lesion specific DNA repair enzymes, should be used more frequently when screening for the potential genotoxicity of chemicals.</p>
26

Chemically Induced DNA Damage in Extended-term Cultures of Human Lymphocytes

Andersson, Maria January 2006 (has links)
Generation of DNA damage is regarded to be an important initial event in the development cancer. Consequently, a battery of tests have been developed to detect different types of genotoxic effects in order to be able to predict the potential genotoxicity and mutagenicity of chemicals, including both pharmaceutical drugs and various types of environmental and occupational agents, as well as dietary factors. The aim of this thesis was to evaluate whether the combination of the comet assay and the extended-term cultures of human lymphocytes (ETC) can be used as an alternative in vitro system to more commonly used transformed mammalian cell lines, and primary cell cultures from humans, when testing the potential genotoxicity of chemicals. Using the comet assay, a panel of reference compounds showed that the ETC were found to detect the DNA-damaging effects with no remarkable difference to what has been reported in other cell types. Moreover, in comparison with a well-established rodent cell line, the mouse lymphoma L5178Y cells, the ETC showed similar sensitivity to the DNA damaging effects of the genotoxic agents hydrogen peroxide and catechol. Although there was an interindividual variation in induced DNA damage and the subsequent repair when using ETC from different blood donors, it did not seem to be of crucial importance for the identification of DNA-damaging agents. The demonstrated difference in sensitivity to catechol-induced DNA damage between freshly isolated peripheral lymphocytes and ETC may very well be due to their different proliferative status but despite this difference, both in vitro systems were able to identify catechol as a DNA-damaging agent at the same concentration. Based on these results, it is proposed that the ETC and the comet assay are a useful combination when testing for the potential DNA damaging effects of chemicals. Representing easily cultivated cells possessing the normal human karyotype, where one blood sample can be used for numerous experiments performed over a long time, extended-term cultures appear to be a useful alternative, both to transformed mammalian cell lines, and primary cell cultures from humans. In fact, the extended-term lymphocytes, with or without S9 and/or lesion specific DNA repair enzymes, should be used more frequently when screening for the potential genotoxicity of chemicals.
27

Etude du comportement mécanique et des mécanismes d'endommagement de pièces métalliques réalisées par fabrication additive / Studying the mechanical behaviour and the damaging mechanisms of metallic parts produced by additive manufacturing

Chastand, Victor 10 November 2016 (has links)
La fabrication additive est un procédé offrant de nouvelles opportunités aux industriels pour fabriquer des pièces complexes, sans outillage spécifique et en optimisant la matière utilisée.Cette thèse présente les propriétés mécaniques de pièces réalisées par fabrication additive et l’analyse des mécanismes d’endommagement associés, en ayant comme référence les propriétés mécaniques des procédés de fonderie et de corroyage. Ce type d’analyse est indispensable pour l’industrialisation du procédé.Les propriétés en traction et en fatigue, sur des éprouvettes en titane Ti-6Al-4V et en aluminium AlSi7Mg0,6, ont été mesurées. Les effets du procédé de fabrication, de la direction de fabrication, du post-usinage et des post-traitements thermiques ont été comparés. Les propriétés sont au moins au niveau de la fonderie.Ces résultats ont été analysés en corrélation avec les microstructures et les faciès de rupture, afin de dégager des mécanismes d’endommagement. Les critères permettant de mesurer la criticité des défauts ont été définis.Certaines de ces hypothèses ont pu être vérifiées grâce à des essais de traction in situ au micro tomographe. / Additive manufacturing offers new opportunities for industries to manufacture complex parts with no additional tooling and better optimization of the material used.This thesis is about the analysis of the mechanical properties and the damaging mechanisms of parts produced by additive manufacturing, using mechanical properties of casted and wrought parts as reference. This type of analysis is necessary in order to industrialize the process.The tensile and fatigue properties on Titanium Ti-6Al-4V and Aluminium AlSi7Mg0,6 were measured. The effects of the process, the manufacturing direction, the post-machining and the post-heat treatments were compared. Properties are at least at the level of casting.A correlation of these results with microstructures and fracture surfaces was made in order to extract the damaging mechanisms. A method to measure the criticity of the defects in a part was defined. Some of these hypotheses were verified using microtomographic in situ tensile tests.
28

Řízení životnosti procesních zařízení v průmyslové praxi / Life-Time Management of Process Devices in Industrial Practice

Lošák, Pavel January 2016 (has links)
This dissertation examines life-time management of process and energetic devices in industrial practice, mainly in the area of steam power plants. Furthermore, it focuses on frequent damage mechanisms occurring in this area. It summarizes basics of damaging mechanisms occurring in the process industry area, their monitoring, evaluation and prediction. In the area of steam power plants, the main emphasize was placed on cumulative damage mechanisms. Within the dissertation, mechanisms of creep, fatigue, and their combinations were assessed. Major European standards were examined in order to discuss the amount of contained conservatism and their usability. Subsequently, attention was paid to the methods applicable for creep and fatigue combination evaluation. In the next step life-time monitoring and evaluation standard was discussed. The diagnostic software was created which includes creep, fatigue and creep-fatigue combination evaluation according to valid standards. For online life-time evaluation was proposed refined analytical solution for stress and strain calculation. To further extend the life-time management, the dissertation describes oxide scale damaging together with its evaluation and implementation into diagnostic software. The proposed software is extended by the material module which on the basis of defined materials allows easy and effective usage of material characteristics. For the purpose of refining life-time prediction accuracy, experimental device was schematically described. In addition, the device should be also able to verify used equations. Furthermore, the dissertation includes solution to industrially oriented cases. Firstly, a steam generator with damaged pipes was analyzed, afterwards damaged transferring pipeline. Further analyses deal with U-tube heat exchanger and its damaging. The causes of damage were discovered and corrective measures were proposed. The dissertation concludes with the summarization of potential activities for subsequent research in examined area.
29

Tillsynsarbete i frisörbranschen

Wold, Lina January 2016 (has links)
Rapportens syfte är dels att belysa om frisörbranschens miljöpåverkan genom kemikalieutsläpp, att undersöka hur kommunens tillsynsrutiner ser ut på frisörsalonger runt om i Sverige. Samt undersöka hur dessa rutiner skulle kunna förbättras för att minska farliga utsläpp och utifrån ett miljöperspektiv skapa mer hållbara arbetssätt. Det slutgiltiga syftet för rapporten är att den ska fungera som ett informationsunderlag till kommunernas tillsynsmän och även till de myndigheter och organisationer som de samarbetar med. Genom kemikalieutsläpp och otillräcklig avfallshantering har frisörbranschen stor påverkan både i inre och yttre miljöer (K. Boll 2011). En rapport från Stockholm Vatten som utfördes 2012 visar även att rester av aromatiska fenoler och aminer finns kvar i överskottsfärgen i håret efter hårfärgning och spolas därmed ut det kommunala avloppssystemet vid efterföljande hårtvättar när kunden gått från salongen. Om färgämnena inte bryts ned i reningsverket kan de störa reningsprocesserna eller försämra kvaliteten på det utgående avloppsvattnet och slam. Flertalet ämnen som vanligtvis hittas i hårprodukter är förutom hälsoskadligt också giftiga för våra vattenlevande organismer och kan orsaka skadliga långtidseffekter i vattenmiljön (S. E. Tjus 2014 ). Idag är inte frisörverksamheter anmälningspliktiga men de har skyldighet att utföra egenkontroll enligt miljöbalken (1998:901). Läkemedelsverket och kommunerna är operativa tillsynsmyndigheter för kosmetiska produkter och ska enligt miljötillsynsförordningen 2011:13 utföra tillsyn över frisörverksamheter. Trots att det finns relativt lite forskning på miljöskadliga ämnen kopplat till just i hygienprodukter så kan dessa ämnen i många fall hittas genom artiklar där det fokuseras på till exempel industriell verksamhet (Europaparlamentet 2007) (Läkemedelsverket 2003). Kathon är ett exempel på detta då det förutom i hårprodukter också används i färg, lim, skärvätskor, spackel och fogmassor. Ämnet kan vara allergiframkallande och är miljöskadliga (E. Vene 2015) (T. Svensson 2016). Inför denna rapport har jag valt att utföra en nulägesanalys över hur Sveriges kommuners tillsynsrutiner ser ut för frisörbranschen, detta skapades genom att kommunerna svarade på tre öppna frågor. För att få ytterligare underlag valde jag ut några kommuner som fick svara på en mer ingående enkät. Ännu ett perspektiv på frågorna har skapats genom att en enkät till frisörer skickats ut. Sammanställningarna av dessa intervjuer indikerar en tydlig informationsbrist både hos kommunen och frisörerna, de båda parterna skulle behöva en konkret plan för att utföra en mer effektiv tillsyn och därmed skapa en möjlighet för att arbeta mot att minska de miljöskadliga aktiviteterna. / The report's purpose is to shed light on the hairdressing industry's environmental impact by chemical emissions, to investigate how the routines for municipal supervisors look like in the hair salons around Sweden. And investigate if these routines could be improved to reduce the harmful emissions and from an environmental perspective create a more sustainable approach. The final aim of the report is that it should operate as an information base for municipal inspectors and also to the authorities and organizations they work with. Through chemical emissions and inadequate waste disposal hairdressing business has a great influence both on internal and external environments (K. Boll 2011). A report that Stockholm Water conducted in 2012 also shows that residues of aromatic phenols and amines remain in your hair after hair wash and are flushed out through the municipal sewage system. If the dyes are not broken down in the water treatment plant, they can interfere with treatment processes or reduce the quality of the outgoing wastewater and sludge. Most substances commonly found in hair products are in addition to harmful too toxic for our aquatic organisms and may cause long-term adverse effects in the aquatic environment (S. E. Tjus 2014). Today the hairdressing business is not notifiable but they are obligated to perform a self-monitoring system under the Environmental Code (SFS 1998:901). Medical Product Agency and municipalities are operational regulating authorities for cosmetic products and should, according to environmental inspection regulation (2011:13) supervise the hairdressing businesses. Although there is relatively little research on environmentally harmful substances linked to hygiene products, the same substances can often be found through articles which focus on industrial activities (European Parliament 2007). Kathon is an example of this as it except in hair products are also used in paints, adhesives, cutting fluids, putty and sealants. The substance is most likely both allergenic and environmentally harmful (E. Vene 2015) (T. Svensson 2016). Prior to this report, I chose to conduct an analysis of the current situation of how the Swedish municipalities' practices the supervising on the saloons. To obtain additional documentation I chose some municipalities that had to answer a more detailed questionnaire. Another perspective on these issues has been provided by a survey that was sent out to hairdressers in Sweden. The compilation of these interviews indicates a clear lack of information among the municipality and the hairdressers, the two parties would need a concrete plan to perform a more effective supervision, thereby creating an opportunity to work towards the reduction of environmentally harmful activities. / <p>2016-06-29</p>
30

La personne morale : un non-professionnel ? / The legal person : a non-professionnal ?

Graf, Olivier 30 January 2015 (has links)
Les personnes morales sont couramment considérées comme des « êtres juridiques » incomplets par rapport aux personnes physiques et voués au seul exercice de leur activité. Pourtant la Cour de cassation a affirmé qu'elles pouvaient bénéficier de certaines protections du droit de la consommation par la qualification de non-professionnel. Cependant, la compréhension finaliste du critère d'application de cette qualification rend cette dernière inopérante à l'égard des personnes morales. Le passage d'une conception monolithique des personnes morales à une vision éclatée, couplé à une compréhension nouvelle du critère d'application permet l'émergence d'une personne morale non-professionnelle, éclairant le droit de la consommation ainsi que les droits de la personnalité des personnes morales. Les personnes morales peuvent ainsi être considérées comme des personnes juridiques différentes des personnes physiques mais néanmoins complètes / Legal persons are commonly regarded as incomplete "legal beings" in comparison with natural persons and as dedicated only to carry on their activity. Yet the French Court of Cassation said they could be protected by the non-professional qualification in French consumer law. However, the finalist understanding of the application criterion for this qualification makes it ineffective against these persons.The transition from a monolithic conception of legal persons to an exploded view, coupled with a new understanding of the application criterion allows the emergence of a non-professional legal person, clarifying consumer law and personality rights of artificial persons. Legal persons can thus be considered as legal entities different from individuals but complete however

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