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Baasner, Amrei [Verfasser], Sharon L. [Akademischer Betreuer] Webb, Ray [Akademischer Betreuer] Dupree, Burkhard C. [Akademischer Betreuer] Schmidt, Harald [Akademischer Betreuer] Behrens, Gerhard [Akademischer Betreuer] Wörner, and Andreas [Akademischer Betreuer] Pack. "The Influence of Fluorine, Chlorine and Water on the Rheology and Structure of Na2O-CaO-Al2O3-SiO2 Melts / Amrei Baasner. Gutachter: Ray Dupree ; Burkhard C. Schmidt ; Harald Behrens ; Gerhard Wörner ; Andreas Pack. Betreuer: Sharon L. Webb." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1051530733/34.
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Morgan, Robert Huw. "The Preludes and fugues (opus 36) of Marcel Dupre︠ and their relationship to the harmonic and melodic processes as set forth in the Traité d'improvisation à l'orgue /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/11303.
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Duprey, Sonia Verriest Jean-Pierre. "Modélisation en éléments finis du complexe de l'épaule et simulation de sa réponse à un choc latéral evelopment of a shoulder finite element model and simulation of its response under lateral loading /." Villeurbanne : Doc'INSA, 2007. http://docinsa.insa-lyon.fr/these/pont.php?id=duprey.
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Jezequel, Anne-Marie. "Louise Dupre les espaces de l'ecriture /." Cincinnati, Ohio : University of Cincinnati, 2006. http://rave.ohiolink.edu/etdc//view?acc_num=ucin1147965583.
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Thesis (Ph. D.)--University of Cincinnati, 2006.Advisor: Dr. Karen Gould. Title from electronic thesis title page (viewed July 16, 2009). Keywords: Louise Dupre; a Quebec woman writer; spaces of writing. Includes abstract. Includes bibliographical references.
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Hulterström, Patrik. "Dupera: att missbruka kommunikation." Thesis, Umeå universitet, Institutionen för idé- och samhällsstudier, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105697.
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According to the widespread concept of deception, deception is to intentionally cause someone to acquire or continue to have a false belief. This paper refutes this notion and argues for a definition of deception based on a view that deception is the misuse of communication with the purpose to achieve a further end; an end that, is believed, can’t be reached without the misuse of communication. It is shown that this new definition can handle cases that earlier definitions could not handle without leading to absurd pragmatic consequences. In addition, the proposed definition makes it possible to properly distinguish between deception and attempted deception.
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Tate, William R. "Full-duplex underwater networking." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FTate.pdf.
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Chen, Lu. "Full Duplex Relay Clusters." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562411023502331.
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Dries, Daniel Michael. "Marcel Dupré the culmination of the French symphonic organ tradition /." Connect to this title online, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050623.160215/.
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Thesis (D. Creative Arts)--University of Wollongong, 2005.Title from PDF title page (viewed on Aug. 13, 2005). Ill., musical examples, and most tables present in print version are lacking in the electronic version, as are accompanying sound recordings on 2 compact discs. Includes bibliographical references (p. 185-191) and discography (p. 192-193).
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Almradi, Ahmed Mohamed Ahmed. "Design and analysis of MIMO cooperative relaying systems." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/design-and-analysis-of-mimo-cooperative-relaying-systems(07eae61a-0990-41a6-a988-46652e2cced0).html.
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Cooperative relaying techniques have recently received significant interests from both academia and industry due to their ability to provide spatial diversity to address the ever increasing demand for extended network coverage, higher data rates without sacrificing extra power resources, greater mobility and enhanced reliability. This thesis mainly considers two themes. Firstly, in the context of self-powered multiple-input-multiple-output (MIMO) full-duplex (FD) relaying, our research focuses on design and performance analysis of MIMO FD relaying systems in the presence of practical transmission impairments. Namely, the impact of spatial fading correlation, imperfect channel state information (CSI), loopback self-interference (LI), and co-channel interference (CCI) on the system performance are investigated. Secondly, in the context of wirelessly-powered MIMO HD relaying, our research focuses on energy beamforming which is used to maximize the overall harvested energy so as to enable longer-distance wireless power transfer when compared to the single antenna nodes. Namely, in the presence of MIMO relaying systems, hop-by-hop information and energy beamforming is proposed where the transmitted signal is steered along the strongest eigenmode of each hop. The wirelessly powered relay scavenge energy from the source information radio-frequency (RF) signal through energy beamforming, where both the time-switching receiver (TSR) and power-splitting receiver (PSR) are considered, then uses the harvested energy to forward the source message to the destination. Our research focuses on developing a comprehensive analytical framework for deriving new closed-form expressions for the outage probability and ergodic capacity for amplify-and-forward (AF) relaying systems, including simpler tight bounds and asymptotic high signal-to-noise (SNR) ratio analysis. First, the optimization problem for the design of source, relay, and destination precoding and/or decoding weight vectors which maximizes the overall signal-to-interference-plus-noise ratio (SINR) is formulated. Then, in order to get closed-form precoding and decoding weight vectors, a sub-optimal solution based on null space projection designed to completely suppress the LI and/or CCI is proposed, through which a closed-form overall SINR is presented. Simulation results show the exactness and tightness of the proposed exact and bound analytical expressions, respectively.
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Levesque, Paul J. "Symbols of transcendence : religious expression in the thought of Louis Dupré /." Louvain : Peeters : W. B. Eerdmans, 1997. http://catalogue.bnf.fr/ark:/12148/cb38859162w.
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Drewe, L. J. "Probing strategies for duplex DNA." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598653.
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Two main approaches have been adopted for the specific detection of the duplex PCR amplicon. The first investigates the potential of denaturing the amplicon so that the resulting single-strand DNA can be applied to the biosensor interface derived with a DNA probe. The work in this thesis validated such an approach using a model single-strand DNA target-probe system and demonstrated that the extent of hybridisation could be improved 3.5-fold by replacing the immobilised DNA with a peptide nucleic acid (PNA) probe of the same sequence. Hybridisation was not, however, demonstrated when the analyte consisted of denatured duplex DNA. The second approach investigated a novel method for detecting duplex PCR amplicons without their prior denaturation. By exploiting the charge properties of PNA this nucleic acid may be manipulated to strand invade duplex DNA at polypurine stretches within the target molecule. A method for the universal incorporation of polypurine motifs into any amplicon using a polypyrimidine rich 5'-tail on the specific PCR primer was adopted to both confer and control the location of strand invasion sites. PNA strand invasion of PCR amplicons generated in this manner was demonstrated both in solution and on the sensor surface and was generally observed within 10 minutes. The relative merits of adopting such an approach for the sensitive, rapid and specific detection and identification of microorganisms is critically discussed in context with alternative methods for detecting microorganisms and further DNA hybridisation formats.
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Pawlik, Aleksandra Karolina. "Duplex emulsions for healthy foods." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3713/.
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Clear scientific links between major diseases and diet are the main reasons for a change in food processing technology and products. Duplex emulsions offer the possibility of reduction of the fat content, and also encapsulation of bio-components and their targeted delivery within the human body. In this work the formulation and production/processing of food grade W\(_1\)/O/W\(_2\) duplex emulsions were investigated in relation to emulsion’s stability. It was shown that when the osmotic pressures between the two water compartments in duplex W\(_1\)/O/W\(_2\) emulsions were balanced, there was still a release of salt in storage. The extent and rate of release was proportional to glucose concentration in the W\(_2\). Duplex emulsions are shear-sensitive and shear-intensive processing could lead to their considerable damage. By using three secondary emulsification techniques: Shirasu Porous Glass (SPG) cross-flow membranes, SPG rotating membrane and high-shear mixer, it was shown that the amount of salt released during storage depends on the emulsification technique. The SPG rotating membrane technique was used to investigate its emulsifying potential. Droplet sizes of simple O/W emulsions were independent of the dispersed phase volume, increasing with the viscosity of the continuous phase and size of the membrane pores. It was also shown that droplet size could be controlled by the concentration and properties of an emulsifier.
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Duprée, Anna [Verfasser], and Florian [Akademischer Betreuer] Wagner. "Rekonditionierung vorgeschädigter Spenderlungen in einem selbstentwickelten Reperfusionssystem / Anna Duprée. Betreuer: Florian Wagner." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2012. http://d-nb.info/102477290X/34.
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Garfias-Mesias, Luis Francisco. "Pitting corrosion of duplex stainless steels." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318008.
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Ho, F. M. "Strand exchange for duplex DNA detection." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604106.
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The phenomenon of strand exchange between an unlabelled double-stranded target oligonucleotide and a single-stranded, fluorophore labelled probe oliognucleotide was investigated. This behaviour was characterised using fluorescence resonance energy transfer (FRET). The individual fluorescence characteristics of the fluorophores the minor-groove binder Hoechst 33258 and the dye Oregon Green 488 were studied, as well as their properties in combination as a FRET pair. These dyes allowed the use of FRET for the study of duplex DNA without the need for covalently attaching two labels on the component strands. Two strategies were studied for the detection of a duplex target. Firstly, detection could be by monitoring the FRET process as a function of time, monitoring the fluorescence intensities at both the donor and acceptor emission peak wavelengths. Single base pair discrimination was achieved, with very high reproducibility, especially if ratiometric analysis of the emission signals was employed. The mechanism of this process was examined using mathematical modelling, and comparisons made with the experimental results. Secondly, an in-gel detection technique was investigated for the detection of the target duplex within a complex mixture. The target sequence was successfully detected from within the enzyme digestion products of plasmids extracted from cloned E. coli cells. This was performed directly from a polyacrylamide electrophoresis gel without the need for blotting, and was possible with or without polymerase chain reaction amplification. Multiplexing was also demonstrated using this in-gel strategy, giving simultaneous detection of two targets of different base sequences and lengths. Finally, the synthesis of an acceptor fluorophore labelled dendrimer was proposed. This opened up the prospect of exploiting the properties of the dendrimer to enhance the FRET signal upon strand exchange.
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Chen, Shixiang. "Division-free duplex for wireless applications." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361075.
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Hutchings, D. "Hydrogen embrittlement of duplex stainless steel." Thesis, University of Manchester, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.631722.
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Duplex stainless steels (DSS's) are frequently used in oil and gas production and are subsequently subjected to cathodic protection. There is now growing concern about the cathodic evolution of hydrogen produced from this protection system, which may diffuse into the alloy and cause an embrittled condition. DSS's have a microstructure that is a mixture of austenite and ferrite and combines the advantages of these grades, whilst minimising their deficiences. In this research, Zeron 100 DSS was studied in six conditions to investigate the effects of hydrogen embrittlement (HE) on the various strengths and microstructures. The six conditions wer~ as follows: as-received, cold worked, age-hardened (475°C embrittlement), high temperature heat treated, rod and powder. To simulate service environments, 3.5% wt NaCI solution at ambient temperature with an applied potential of -1.1 V (SCE) was used. The effect of pre-charging for up to 550 hours at 80°C was also investigated. Test methods included slow strain rate testing (SSRT), monitoring of transient crack propagation (TCP) using circumferentially notched tensile specimens using a DC potential drop method, acoustic emission CAE) and some conventional bolt loaded fracture mechanics specimens. Test results were correlated with the varying microstructures and environmental conditions and consisted of mechanical properties, threshold crack growth including transient effects and AE data. In this work transgranular cleavage cracks were obtained in the susceptible ferrite phase as a direct result of HE; the depth of these cracks implied a high hydrogen concentration throughout the specimen. The austenite failed by ductile tearing and acted as a physical barrier to the propagation of cleavage cracks. As a result of SSR testing the best material was found to be the powder material; the fine equally dispersed austenite phase caused a lowering of the effective K value. The worst material was the high temperature heat treated type because it contained more ferrite (11:1 72%). The age-hardened material was also susceptible because of the hard and brittle ex' phase. However, regardless of the environment the UTS remained virtua]]y unchanged for each individual material, indicating that most cracking occurred in the post-UTS stage of the test. With the TCP test a lowering of the fracture load was found when an HE environment was used; daldt vs Kq curves were produced, however the DC potential drop equipment could not accurately measure crack growth because of the bridging effect of the austenite phase. The most susceptible microstructures were again the age-hardened and heat treated types. The hydrogen evolution reaction (HER) was also investigated by creating a fresh surface on the as-received DSS and studying the changes in the HER. This work showed that the effect of scratching is irreversible. Also the oxide film can not be totaHy reduced electrochemica]]y and only mechanical methods can remove the oxide films entirely. Fina]]y a means of detecting "475°C embrittlement" of DSS's was investigated using an electrochemical technique in 5M HCI. i-E curves were produced which showed the reactivation of the ferrite and austenite phases in the as-received material. By age-hardening at 475°C the two reactivation peaks merged.
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Martin, Guilhem. "Hot workability of duplex stainless steels." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00721764.
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Les aciers inoxydables austéno-ferritiques présentent une microstructure biphasée dans laquelle se mêlent austénite et ferrite. Leurs caractéristiques mécaniques élevées ainsi que leur bonne tenue en corrosion en font un candidat sérieux pour remplacer les aciers inoxydables austénitiques. Malheureusement, la faible forgeabilité de ces alliages rend la fabrication de tôles particulièrement critique. En effet, le phénomène de " crique de rive " est fréquemment rencontré au cours des étapes du laminage à chaud. Par conséquent, cela nécessite des opérations supplémentaires comme le découpage des rives, ce qui aboutit à une augmentation des coûts de production. Les différents facteurs influençant la ductilité à chaud de ces aciers sont passés en revue afin d'identifier quels sont les zones d'ombres. La synthèse bibliographique révèle deux zones d'ombres : d'une part, le manque d'un essai de ductilité à chaud permettant de discriminer différentes microstructures en terme de résistance à la propagation de fissure à haute température ; et d'autre part l'absence de données quantitative concernant la partition de la déformation entre la ferrite et l'austénite lors des étapes de mise en forme à chaud. Le concept de travail essentiel de rupture a été appliqué à hautes températures. Il a été démontré que cette méthode est fiable et discriminante pour quantifier la résistance à la propagation de fissure à haute température. Elle permet également de générer un paramètre physique pertinent pour optimiser les microstructures par rapport à un mode de mise en forme donné. La technique conventionnelle de micro-grilles a été adaptée de manière à cartographier à haute température les déformations à l'échelle de la microstructure. Cette technique fournit en plus des résultats qualitatifs concernant les mécanismes de déformations, des données quantitatives à propos de la partition de la déformation entre la ferrite et l'austénite. Ces données peuvent être utilisées afin de valider les modèles qui prédisent le comportement à chaud des aciers duplex pendant les premières étapes du laminage à chaud. Les deux outils developpés au cours de cette étude permettent de donner des solutions pour éviter le phénomène de " crique de rives ".
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Soylu, B. "Phase tranformations in duplex stainless steels." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235281.
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Bektas, Kurtulus. "Full-duplex underwater networking using CDMA." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FBektas.pdf.
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Sagradi, Debora Pulino. "Superplasticidade de um aço inoxidavel duplex." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263048.
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Orientadores: Ana M. M. Nazar, Ricardo E. MedranoTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-07-22T01:43:55Z (GMT). No. of bitstreams: 1 Sagradi_DeboraPulino_D.pdf: 12577810 bytes, checksum: a9c00a427e30de3148040672fc53ed66 (MD5) Previous issue date: 1996
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Abstract: Superplasticity is the ability of certain materials to deform homogeneously with high elongations (several hundreds or thousands percent) at elevated temperatures and low strain rates. This subject of scientific and teclinological interest is not well slablished yet. The purpose of present work is to characterize and to study the superplastic behavior of a 22.5%Cr-6.4%Ni-3.0%Mo-0.16%N duplex stainless steel. Therefore, samples from sheets of the material were examined at 950°C and 98CFC by means of tensile, strain rate change and stress relaxation tests. Moreover, microstructures and cavitation process under main conditions were also analyzed. Tensile tests provided informations about elongation and deformation homogeneity. On the other hand, the strain rate change and stress relaxation tests were more suitable to determine the strain rate sensitivity. The superplastic behavior analysis was based on whole results from elongation, strain rate sensitivity and deformation uniformity. According to these criteria, the material exhibits superplastic deformation at 980X with strain rates ranging from 10 s" to ! 0' s". Under these conditions the deformation was homogeneous (without necking), the strain rate sensitivity coefficient attained 0.7 and elongation achieved 900%. During deformation: (i) the initial microstructure composed of oriented phases change to an equiaxed stable structure and (ii) cavitation process occurs. These observations suggest the grain boundary sliding as the main superplastic deformation mechanism. Key Words: super-plasticity, duplex stainless steel, tensile test, strain rate change test, stress relaxation
Doutorado
Materiais e Processos de Fabricação
Doutor em Engenharia Mecânica
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Sharafi, Shahriar. "Microstructure of super-duplex stainless steels." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/221879.
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Mössinger, Klaus. "Innovative Duplex Filter for Hydraulic Applications." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199519.
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For decades, duplex filters have been put to use virtually unmodified. Technologies, handling and use of materials show enormous potential for improvement. Filter element emoval/replacement is performed according to a complex process sequence. With the newly developed Duplex Filter, the market demands concerning simple filter element removal/replacement, as well as weight and pressure loss reduction are fully met.
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Martins, Alessandra Souza. "Estudo comparativo da resistÃncia à corrosÃo dos aÃos inoxidÃveis super duplex ASTM A890 / A890M grau 5A e 6A." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12591.
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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel SuperiorUma liga metÃlica que vem apresentando um desempenho satisfatÃrio em ambientes de maior agressividade à o aÃo inoxidÃvel super duplex. Esse tipo de aÃo possui boas propriedades de resistÃncia mecÃnica, resistÃncia à corrosÃo e tenacidade ao impacto. Mesmo apresentando desempenho satisfatÃrio, esses aÃos podem apresentar problemas de corrosÃo quando sofrem algum tratamento tÃrmico devido à precipitaÃÃo de uma fase deletÃria chamada de alfa linha (â), a qual precipita em temperaturas entre 300 ⁰C e 550 ⁰C e pode ocasionar uma diminuiÃÃo da resistÃncia à corrosÃo e tenacidade do material. Portanto, o objetivo deste trabalho à avaliar a resistÃncia à corrosÃo dos aÃos inoxidÃveis super duplex fundidos de grau 5A e 6A apÃs sofrerem tratamento tÃrmico a 475 ⁰C. O grau 6A se difere do 5A pela presenÃa de cobre e tungstÃnio na sua composiÃÃo quÃmica. A resistÃncia à corrosÃo dos corpos de prova foi avaliada por meio das seguintes tÃcnicas eletroquÃmicas: monitoramento do potencial de circuito aberto, polarizaÃÃo anÃdica, polarizaÃÃo cÃclica, espectroscopia de impedÃncia eletroquÃmica e temperatura crÃtica de pite. Foi realizada a caraterizaÃÃo microestrutural dos materiais, onde foi possÃvel observar sua estrutura bifÃsica composta por uma matriz ferrÃtica e ilhas de austenita em proporÃÃes coerentes. O ensaio de dureza Brinell mostrou que a dureza aumenta nas primeiras horas de tratamento tÃrmico e, depois, hà uma diminuiÃÃo nessa taxa de aumento da dureza. Os resultados eletroquÃmicos indicaram que, para os dois tipos de aÃo estudados, as amostras com 10 horas de tratamento tÃrmico apresentaram uma maior resistÃncia à corrosÃo.
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Owusu-Ansah, Justice. "The effects of zoning policies and practices on low and moderate income housing in municipalities in DuPage County, Illinois." Virtual Press, 2003. http://liblink.bsu.edu/uhtbin/catkey/1259756.
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Four municipalities in DuPage County, Illinois were selected for study to determine the effects of zoning on housing that is affordable to low and moderate-income groups, and to suggest possible recommendations to achieve some inclusiveness by providing a wide range of housing options.Though Woodridge, Naperville and Villa Park appear to have made progress in terms of providing housing choices for low and moderate income groups, there exist some limited opportunities to increase affordable housing in these communities. Oak Brook is most exclusionary. It provides no opportunities for low and moderate-income groups that work in that community, even though it is a major employment center. This creates difficulties for entry job seekers and other low groups that want to live in these communities.The recommendations are specifically tailored to each community in terms of what the community could realistically do, in view of the limited land available for development. This study is intended to renew interest in zoning and affordable housing, and lead to zoning reforms in communities in DuPage County, Illinois.Department of Urban Planning
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Filsell, Jeremy D. "A contextual and analytical investigation of the organ music of Marcel Dupre." Thesis, Birmingham City University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.478903.
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There is an absence of critical writing on the organ music of Marcel Dupre (1886- 1971), despite its significance for the evolution of the organ and its music in the twentieth century. Fundamental to this thesis is an exploration of the historical context of this music and poietic analysis which attempts to reveal its stylistic features. That Dupre's organ music reflects contemporaneous influences from outside and beyond the organ loft has been hitherto unacknowledged and so there is an attempt to identify the more cosmopolitan influences exerted on his music by the wider artistic culture of his time. An overall aim within the study is to consider whether Dupre's stylistically diverse music, in its embodiment of both a nineteenthcentury linguistic conventionality and a more contemporary style in the twentieth, was in any sense stylistically paradoxical and indeed, whether the organ as instrumental resource played a role in this stylistic plurality. Dupre's self-confessed aim was to raise the organ's status in artistic terms and his music exemplifies important developments in both organ design and pedagogy over the course of the twentieth century. Thus, in light of the contextual and analytical investigations, an attempt is made to ascertain the extent to which Dupre influenced a succeeding generation and whether his pedagogical, playing and creative legacy holds important implications for musicians today. There is also an intent to address issues regarding the performance and recording of Dupre's works in esthesic terms, for it is hoped that the recordings forming an integral part of this thesis endorse, in their representation of analytical discovery in sonic form, certain thoughts and conclusions contained herein. Part 1 forms an appraisal of Dupre's musical and artistic milieu. After the Introduction in Chapter 1, Chapter 2 elucidates the stylistic antecedents of his music and Chapter 3 identifies a specifically organ-based aesthetic. Chapter 4 examines the pedagogical methods that reflected Dupre's high artistic purpose and which formed the backbone to his creative idiom. In Part 2, Chapter 5 elucidates an analytical method before Chapters 6,7,8 and 9 discuss the primary characteristics of his compositional language with musical examples drawn from across the oeuvre. Chapter 10 presents four Case-studies by examining in analytical detail, four of the six Symphonic works. These I have deemed to be of seminal importance for in them is the Dupre aesthetic arguably best exposed. In Part 3, chapter 11 engages with interpretative and esthesic matters in performance and recording before the interpretative issues in Dupre's works are considered in Chapter 12. Chapter 13 forms a Conclusion. Appendix A is a biographical timeline, Appendix B contains organ specifications referred to in Chapter 3 and Appendix C cites a lecture given by Dupre to Paris Conservatoire students in 1954. It is a document which expounds elegantly, and in Dupre's own words, the kernel of his artistry. Appendix D is a discography, Appendix E catalogues the complete Dupre oeuvre and Appendix F comprises miscellaneous and supporting documents.
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Sture, Henrik. "Integrity Evaluation of Duplex Stainless Steel Flanges." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produktutvikling og materialer, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19055.
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Duplex stainless steel flanges are normally forged to form, as required by the ASTM A182/A182M standard, but may also potentially be machined directly from forged stainless steel bar. In order to evaluate the integrity of such flanges, axisymmetric elastic-plastic finite element models have been developed, considering static effects such as bolt load and internal pressure. Additionally, tensile testing of a sample forged bar (UNS S31803) has been conducted. The stress distribution in a flange during gasket seating and operating conditions has been determined, as well as the degree of plastic strain caused by the bolt loads. The maximum stresses have been found to be around the same values as the minimum yield strength requirement of the studied material (UNS S31803), and the location of the maximum stress concentrations have been identified as the gasket groove. The tensile tests of the forged bar (UNS S31803) have shown that the yield and tensile strength properties are considerably higher than the standardized minimum requirements. The elastic modulus of the forged bar has also been determined, and was found to be lower than anticipated in the axisymmetric models. Some specimens have also been found to exhibit highly non-linear elastic properties.
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Weis, Karin. "Explorations of the duplex theory of hate." Berlin Logos, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2762595&prov=M&dokv̲ar=1&doke̲xt=htm.
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Sieurin, Henrik. "Fracture toughness properties of duplex stainless steels." Doctoral thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3964.
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Gavathiotis, Evripidis. "Drug-targetting of duplex and quadruplex DNA." Thesis, University of Nottingham, 2002. http://eprints.nottingham.ac.uk/27683/.
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This thesis investigates structural and dynamic properties of drug recognition mechanisms to duplex and quadruplex DNA using primarily high field NMR techniques and molecular dynamics simulations. The mechanism of co-operative binding of Hoechst 33258 to the DNA minor groove of duplexes that contain two binding sites such as d(CTTTTGCAAAAG)2, d(GAAAAGCTTTC)2 and d(CTTTTGGCCAAAAG)2 has been studied. NMR and other titration techniques have evidenced co-operative binding and no detection of an intermediate 1:1 complex. High-resolution NMR structure determination showed no evidence of direct contact between Hoechst 33258 molecules or DNA structure deformation that would facilitate co-operativity, Molecular dynamics simulations based on NMR data, allowed us to calculate thermodynamic quantities of the two binding events, and lead us to conclude that ligand binding can induce changes in DNA conformational flexibility in sites of the structure distant from the binding site and result in more favourable second ligand binding. The results highlight the general importance of flexibility in determining the properties of ligand-DNA interactions. The relative importance of ligand isohelicity and phasing in DNA minor groove has been investigated by studying the structure and dynamics of the 1:1 complex of Hoechst IO-d(GCAAATTTGC)2. The results suggest that DNA sequence-dependent structure and flexibility have significant role for the strong binding of Hoechst 10 to the duplex. The formation, stability, structure and dynamics of the d(TTAGGGT)4 quadruplex structure, which contains the human telomeric repeat TTAGGG, have been studied. Characteristic features of the quadruplex structure were determined and this information was used for understanding drug-quadruplex interactions. The complex of the fluorinated polycyclic methylacridinium cation RHPS4, lead compound for telomerase inhibition, with the d(TTAGGGT)4 quadruplex structure has been investigated. RHPS4 forms a stable G-quadruplex complex by endstacking externally to the a-tetrads of the Apa and Gp'T steps. This study presents detailed properties of the complex and provides further information for lead optimisation studies.
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Mohammed, Farej Ahmed. "Stress corrosion cracking in duplex stainless steels." Thesis, University of Manchester, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488331.
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Booth, James Alexander. "Propargylamino modified bases for DNA duplex stabilisation." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417981.
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Kim, Yoon-Jun. "Phase Transformations in Cast Duplex Stainless Steels." Ames, Iowa : Oak Ridge, Tenn. : Ames Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/837274-V0QAJQ/webviewable/.
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Thesis (Ph.D.); Submitted to Iowa State Univ., Ames, IA (US); 19 Dec 2004.Published through the Information Bridge: DOE Scientific and Technical Information. "IS-T 2322" Yoon-Jun Kim. US Department of Energy 12/19/2004. Report is also available in paper and microfiche from NTIS.
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Wannas, Hussain. "Full Duplex Multiuser MIMO with Massive Arrays." Thesis, Linköpings universitet, Institutionen för systemteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-105268.
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Half-Duplex Multiuser Multiple-Input Multiple-Output (HD MU-MIMO) systemscurrently employed in communication systems are not experiencing the selfinterference(SI) problem but they are not optimal in terms of efficiency and interms of resources used (time and frequency resources). Ignoring the effect of largescalefading, we start by explaining the uplink (UL) and downlink (DL) parts ofthe MU-MIMO system and how the sum-rate is calculated. We also introduce thethree linear receivers/precoders, Maximum-Ratio Combining (MRC)/Maximum-Ratio Transmission (MRT), Zero-Forcing (ZF), and Minimum Mean-Square Error(MMSE) and which of the three types is going to be used in the study of Full-Duplex Multiuser Multiple-input Multiple-output (FD MU-MIMO) system. Thenwe introduce FD MU-MIMO system, and how the equation used to calculate thesum-rate of the UL part changes when the SI occurs, and why SI problem is notpresent in the DL part. Next, we introduce the spectral efficiency (SE), and howto calculate it and why it is taken as a parameter to compare HD and FD systems.Also the effect of SI on FD MU-MIMO system is presented through simulationgraphs, then we move to show how to reduce SI effect by increasing the number ofantennas in the base-station (BS). Lastly, we take the effect of large scale fading inorder to reach a simple statistical model in the form cumulative distribution function(CDF) graph for different values of SI and compare those of FD MU-MIMOsystem to HD MU-MIMO. The results show that FD MU-MIMO together withmassive MIMO technology is very promising and would save time and frequencyresources which means an increase in the SE but SI must be below a certain level.
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Jebur, Bilal Alauldeen. "Full duplex-transceivers : architectures and performance analysis." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/4008.
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The revolution of the 5G communication systems will result in 10,000 times increase in the total mobile broadband traffic in the 2020s, which will increase the demand on the limited wireless spectrum. This has highlighted the need for an efficient frequency-reuse technique that can meet the ever-increasing demand on the available frequency resources. In-band full-duplex (FD) wireless technology that enables the transceiver nodes to transmit and receive simultaneously over the same frequency band, has gained tremendous attention as a promising technology to double the spectral efficiency of the traditional half-duplex (HD) systems. However, this technology faces a formidable challenge, that is the large power difference between the self-interference (SI) signal and the signal of interest from a remote transceiver node. In this thesis, we focus on the architecture of the FD transceivers and investigate their ability to approximately double the throughput and the spectral efficiency of the conventional HD systems. Moreover, this thesis is concerned with the design of efficient self-interference cancellation schemes that can be combined with the architecture of the FD transceiver nodes in order to effectively suppress the SI signal and enable the FD mode. In particular, an orthogonal frequency-division multiplexing (OFDM) based amplify-and-forward (AF) FD physical-layer network coding (PLNC) system is proposed. To enable the FD mode in the proposed system, a hybrid SIC scheme that is a combination of passive SIC mechanism and active SIC technique is exploited at each transceiver node of that system. Next, we propose an adaptive SIC scheme, which utilizes the normalized least-mean-square (NLMS) algorithm to effectively suppress the SI signal to the level of the noise floor. The proposed adaptive SIC is then utilized in a denoise-and-forward (DNF) FD-PLNC system to enable the FD mode. Finally, we introduce a novel overthe- air SIC scheme that can effectively mitigate the SI signal before it arrives the local analog-to-digital converter (ADC) of the FD transceiver nodes. Furthermore, the impact of the hardware impairments on the performance of the introduced SIC scheme is examined and characterized.
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Garcez, Luciane Ruschel Nascimento. "Hubert Duprat e a poética do revestimento." Universidade do Estado de Santa Catarina, 2009. http://tede.udesc.br/handle/handle/759.
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This research intended an analysis from the French plastic artist Hubert Duprat s work, his Cases. Aiming to study questions that could help to understand contemporary art and its peculiarities, and wishing understanding a little more about the use of gold as plastic material in art through time, this contemporary artist was chosen and this work of his, which are little cases made in gold and precious stones. The artist started this work with cocoons in 1983 and is developing it until today, raising questions that are anachronical in Art History, as the concepts of sacred, copy without original, strangeness, preciosity. However this artist also resignifies the work s making in contemporary art, once his artistic process is based in the object, the result, the finishing, more than just the concept or generating idea. Starting from these premises, other series of this artist s works followed, which are related to the gold cases through material or concept; and with the help of authors as Georges Didi-Huberman and Aby Warburg it was possible to look to these works from an assembling procedure, and with Gilles Deleuze it was allowed to develop a study based in his concept of repetition with difference. This theoretical luggage legitimated other relations of the Duprat s selected works to other artists and periods in art history, bringing to the research the matter that symptoms return in art, come back with differences, resignifying and withdrawing some works of oversight, but go as a reiteration that presents itself, and it is through art that it can be traced
Esta pesquisa pretendeu fazer uma análise partindo de uma obra do artista plástico francês Hubert Duprat, seus Casulos. Com o objetivo de estudar questões que ajudassem a compreender a arte contemporânea e suas peculiaridades, e com o desejo de entender um pouco mais sobre o uso do ouro como matéria plástica na arte ao longo dos tempos, foi escolhido este artista contemporâneo e este seu trabalho, que são pequenos casulos confeccionados em ouro e pedras preciosas. O artista iniciou este trabalho de casulos em 1983 e vem desenvolvendo até hoje, levantando questões que são anacrônicas na História da Arte, como os conceitos de sagrado, cópia sem original, estranhamento, preciosismo. Entretanto este artista também ressignifica a fatura da obra na arte contemporânea, posto que seu processo artístico é fundamentado no objeto, no resultado, no acabamento, mais do que simplesmente no conceito ou a idéia geradora da obra. Partindo destas premissas, seguiram-se outras séries deste artista, que matérica ou conceitualmente se relacionam aos casulos de ouro; e com a ajuda de teóricos como Georges Didi-Huberman e Aby Warburg foi possível olhar estes trabalhos partindo de um procedimento de montagem, e com Gilles Deleuze permitiu-se desenvolver um estudo baseado em seu conceito de repetição com diferença. Este arcabouço teórico legitimou que se fizessem relações das obras selecionadas de Duprat com outros artistas e outros períodos da história da arte, trazendo para a pesquisa a questão de que sintomas retornam na arte, voltam com diferenças, ressignificando e retirando certas obras do esquecimento, mas seguem como um recalque que se apresenta, e é através da arte que isto pode ser mapeado
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Towhidlou, Vahid. "Full duplex communication in cognitive radio networks." Thesis, King's College London (University of London), 2017. https://kclpure.kcl.ac.uk/portal/en/theses/full-duplex-communication-in-cognitive-radio-networks(5453e11d-6736-48ab-b49c-090df3373807).html.
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Over the past decade mobile services have evolved from basic voice communication to mobile-broadband multimedia services and sophisticated wireless applications. Today, we cannot imagine a world without wireless communications and smart mobile devices. Any wireless communication relies on the availability of radiofrequency spectrum, which is inherently a finite resource and cannot be produced. This unprecedented growth of wireless devices and services has motivated academia and industry to look for new solutions in utilizing the wireless spectrum more intelligently and efficiently. Cognitive radio (CR) and Full Duplex (FD) communication are two promising technologies recently developed to enhance spectrum utilization and network efficiency, and combination thereof will improve the performance even further. CR technology has been extensively studied within the past 15 years and made available for commercial applications. On the other hand, full duplex communication was not deemed possible due to some complications until recently, when the advances in Self-Interference Suppression (SIS) methods made it possible to implement this technology in future wireless networks. In line with the global attention on full duplex and cognitive radio technologies, this research investigates new schemes of implementing full duplex communication in cognitive radio networks. In part of this thesis, the advantages of in-band full duplex transmissions in doubling the spectral efficiency and enhancing overall performance of a system, have been studied in a proposed scheme incorporating cooperative Automatic Repeat reQuest (ARQ) in an overlay cognitive radio network. It is shown that a full duplex cooperative ARQ protocol will increase the throughput of primary and secondary networks, without any degradation on primary network performance. Another part of this thesis focuses on asynchronous bidirectional FD communication in a CR system. While detection probability is enhanced due to cooperative sensing, the probability of collision and average duration of collisions are decreased significantly thanks to the implementation of asynchronous full duplex transmissions. These gains in network performance are additional to improved throughput of secondary network achieved through implementation of full duplex transmission. The proposed schemes are mathematically analyzed and have been numerically verified through extensive simulations. As a contribution to IEEE 802.22 Standard revision, a novel suggestion incorporating the use of directional sector antennas, and full duplex operation of secondary users in a Wireless Regional Area Network (WRAN) has been proposed in another part of this thesis and it has been shown how research achievements may be implemented in practice. A summary of the thesis plus some suggestions for future work conclude this thesis.
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Dalton, John Christian. "Surface Hardening of Duplex Stainless Steel 2205." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1480696856644048.
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Dana, Seresht Mahmoudreza. "Material Selection for Deepwater Gate Valves." Thesis, KTH, Materialvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170023.
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Material selection is an important step during the design process of an object. The goal is to produce an object to meet the requirement with minimum cost. During the recent years with discovery of oil and gas in deep water, oil and gas industry facing new challenges of handling corrosive material in seabed that gives more importance and criticality to material selection of equipment for this kind of application. Hydrogen sulfide (H2S), chloride and carbon dioxide (CO2) have made the big challenges for material that handle corrosive fluids in the seabed.This report presents a brief review of material selection for two parts of deepwater gate valve, Body and Gate. It is mostly focused on mechanical properties and required corrosion resistance. Ferritic alloys with low PRE numbers and low mechanical properties and also austenitic alloys with low yield strength are not a proper option for this case. Alloy 2205 is the most common stainless steel which is used in deep water gate valve production. There are other alloys in duplex group that show better mechanical and chemical properties than alloy 2205 but because of their high expense are not used by industries.
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Recco, Abel André Cândido. "Estudo da obtenção e das propriedades dos filmes de TiN e TiC depositados sobre aços ferramentas AISI H13 e D2 nitretados e não nitretados." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-16042009-140247/.
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Filmes de nitreto de titânio e carbeto de titânio foram obtidos por deposição reativa via magnetron sputtering, utilizando como gases reativos, nitrogênio e metano, respectivamente. Foram depositados filmes de TiN e TiC, primeiramente sobre substratos de aços ferramenta AISI H13 e AISI D2 temperados e revenidos. Posteriormente, realizou-se o tratamento duplex de nitretação e deposição de TiN e TiC em reator híbrido, construído durante o presente trabalho. Os revestimentos foram caracterizados por microscopia eletrônica de varredura, difração de raios-X, espectrometria XPS e WDS e a rugosidade foi caracterizada por microscopia de força atômica. As propriedades mecânicas dos filmes foram determinadas utilizando a técnica de nanoindentação instrumentada, para avaliar a dureza(H), o módulo de elasticidade reduzido (E*), a recuperação elástica(we), a razão H/E* e a relação H3/E*2. Além disso, a adesão do filme ao substrato foi avaliada usando ensaios Rockwell e esclerometria linear. A resistência ao risco dos filmes depositados foi avaliada por nanoesclerometria instrumentada. O tratamento termoquímico de nitretação a plasma foi realizado em condições experimentais que inibem a formação da camada branca obtendo, assim, somente zona de difusão. Os resultados obtidos mostraram que quando os filmes de TiN e TiC são depositados sobre substratos não nitretados a adesão do filme cerâmico ao substrato metálico é baixa. O endurecimento do substrato, devido à nitretação a plasma, resultou em uma melhoria significativa na adesão(LC40 N) do filme de TiN sobre os substratos de aços ferramenta. Entretanto, o endurecimento prévio e o aumento da capacidade de suportar carga do substrato não constituem uma garantia de melhora de adesão do filme cerâmico ao substrato metálico. Para o filme de TiC depositado sobre aços ferramenta nitretados, a adesão(LC10 N) ao substrato foi baixa. A grande diferença entre as propriedades elastoplásticas, do filme de TiC e do substrato nitretado são as responsáveis pela baixa adesão. Este comportamento é semelhante ao observado para filmes de TiN e TiC depositados sobre os aços ferramenta não nitretados. Uma alternativa encontrada para melhorar a adesão dos filmes cerâmicos ao substrato foi a deposição de multicoberturas de TiN/TiC, depositados de modo a aumentar gradativamente os valores de H/E*, da relação H3/E*2 e da recuperação elástica obtendo, assim, um gradiente funcional destas propriedades. Em relação aos ensaios de nanoesclerometria conclui-se que a dureza não é por si só 2 determinante da profundidade residual no ensaio. Filmes com mesmo valor de dureza podem apresentar profundidades residuais diferentes. Nos ensaios de nanoesclerometria os filmes com altos valores de razão H/E*, da relação H3/E*2 e recuperação elástica possuem profundidades residuais menores.DC Triode Reactive Magnetron Sputtered TiN and TiC films were deposited on quenched and tempered AISI H13 AISI D2 tool steels, and silicon (111) substrates, under nitrogen and argon or methane and argon reactive plasma. Hybrid duplex treatments were carried out in a home-built hybrid reactor, where pulsed plasma nitriding and unbalanced DC Reactive Magnetron Sputtering were performed in the same cycle, without exposing the surface of the sample to atmospheric pressure. The ceramic thin films were characterized by X-ray diffraction, WDS spectrometry, scanning electron microscopy, atomic force microscopy, depth sensing techniques (nanoscale), nanoscratch tests, Rockwell C and linear sclerometry adhesion tests. Nanoscale depth sensing was used for measuring hardness (H), Young modulus (E*), the H/E* ratio (elastic strain to failure), resistance to plastic deformation, H3/E*2 and elastic recovery. The pulsed plasma nitriding was performed in conditions which avoided the formation of a white layer obtaining only a diffusion zone. When TiN and TiC films were deposited on the quenched and tempered tool steels the adhesion of the ceramic films to the substrate was poor. When the steels were plasma nitrided before deposition the adhesion of the TiN layer to the substrate was improved. However, the adhesion of the TiC film deposited on the nitrided tool steels was also very poor. Therefore, plasma nitriding does not guarantee a better adhesion of the TiC film to the substrate. The abrupt transition of mechanical properties (hardness, Young Modulus and elastic recovery) between the TiC film and the substrate were responsible for the lower adhesion observed. To improve the adhesion of the ceramic film to the substrate, TiN-TiC multilayers were deposited on the surface of the nitrided tool steels, so as to obtain functionally graded films, in which the values of H/E* ratio and elastic recovery, increased in a less abrupt way from the substrate to the film. In the nanoscratch test high it was observed that high values of the H/E* and the H3/E*2 ratios and of the elastic recovery presented lower residual scratch depth.
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Centeno, Dany Michell Andrade. "Análise microestrutural de junta brasada de aço inoxidável duplex UNS S32101, UNS S32304, UNS S32750 e UNS S32707 com metal de adição a base de níquel." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19092014-111340/.
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Os aços inoxidáveis duplex (AID) caracterizam-se pela sua microestrutura composta por austenita numa matriz ferrítica, com fração volumétrica média de 50% para cada fase. A combinação destas características confere-lhes excelente resistência mecânica e à corrosão. A soldagem/junção destes aços é frequentemente uma operação crítica, já que, ao sofrer ciclos térmicos, estes aços têm suas propriedades alteradas. Portanto, processos de junção com ausência de gradientes de temperatura, como a brasagem, mostram-se uma solução prática para a junção destes aços. No entanto, o adequado desenvolvimento do processo de brasagem em AID envolve considerações importantes a respeito da escolha dos parâmetros de processamento e metal de adição em conjunto com os ciclos térmicos de aquecimento e resfriamento. O presente estudo pretende avaliar a brasabilidade dos AID UNS S32101(baixa liga), UNS S32304 (baixa liga), UNS S32507 (superduplex) e UNS S32707(hiperduplex), mediante a caracterização da junta brasada. Estes aços foram brasados em forno continuo com metal de adição BNi-7 (Ni-Cr-P), na temperatura de 1100oC, por tempos de 32 min e 12 min, seguidos de resfriamento em forno, utilizando-se folgas de 0,5, 0,3 e 0,0 mm. A junta brasada foi caracterizada utilizando-se microscopia ótica e microscopia eletrônica de varredura (MEV). A identificação microestrutural foi realizada via Microanálise Química de Energia Dispersiva de Raios-X (EDS) e difração de Raios-X. Foi identificada na junta brasada dos diferentes AID a fase rica em níquel, assim como fases prejudiciais compostas por fosfetos de níquel e cromo. A fase rica em níquel, que usualmente é denominada de -Ni, apresenta-se preferencialmente em toda a região da junta, sem a presença de fase intermetálica contínua no centro da junta. No caso dos aços inoxidáveis super e hiperduplex esses apresentaram a formação de fase sigma na região da interface da junta, do lado do metal de base, devido aos ciclos térmicos de brasagemThe duplex stainless steels (DSS) are characterized by its microstructure consisting of austenite in a ferritic matrix with mean volumetric fraction of 50% for each phase. The combination of these features gives them excellent mechanical strength and corrosion resistance. The welding / joining of these steels are often considered as a critical operation, since, subjected to thermal cycles, they have their microstructures changed and, consequently, their properties. Therefore, joining processes without temperature gradients, like brazing, are shown as a practical solution for joining these steels. However, the proper development of brazing process of DSS involves important issues concerning the choice of processing parameters and the brazing filler metal together with heating and cooling brazing thermal cycles. This study aims at evaluating the brazeability of DSS UNS S32101 (lean duplex), UNS S32304 (lean duplex), UNS S32507 (superduplex) and UNS S32707 (hyperduplex) by characterizing the brazed joint. These steels were brazed in a furnace with filler metal BNi-7 (Ni-Cr-P) at 1100°C for times of 32 min and 12 min, followed by cooling in a continuous brazing furnace, with joint gaps of 0.5 , 0.3 and 0.0 mm. The brazed joint was characterized using optical microscopy and scanning electron microscopy (SEM). The phase identifications were performed by microanalysis using energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction. Results showed, for non-ideal joint gaps, in all duplex used in this work, the Ni rich solid solution, as well as deleterious phases composed of nickel and chromium phosphides. The ideal gap presented Ni rich solid solution, usually called -Ni, was found continuously without a continuous intermetallic region in the joint center. In the case of super duplex and hyperduplex brazing, the brazing thermal cycles produced the formation of sigma phase in the region of the joint interface, in the base metal.
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Ñique, Rivas Elky Noe. "Cálculo del sistema de rociadores contra incendios para los almacenes de Dupre - Ate." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2018. https://hdl.handle.net/20.500.12672/9158.
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Publicación a texto completo no autorizada por el autorEl documento digital no refiere asesor
Dupree es una compañía de venta por catálogo, que cuenta con un almacén central en el distrito de Ate con un alto grado de combustibilidad tales como cartón, telas, plásticos, aceites básicos, etc. En la planta se almacenan estos productos para su posterior venta. El almacenamiento interior se caracteriza por naves o almacenes con techo de tipo de dos aguas donde se almacenan apilados en estanterías metálicas. Se busca implementar un sistema de protección contra incendios adecuado, de acuerdo al ente regulador nacional, RNE y normas internacionales como NFPA (NATIONAL FIRE PROTECTION ASSOCIATION), el diseño contempla una red de distribución de tuberías, cálculo del volumen de agua de la cisterna, sistema de rociadores automáticos y dispositivos de descarga de agua como (rociadores automáticos). La red de protección contra incendios está dimensionada de acuerdo a cálculos hidráulicos, dichos resultados se muestran en tablas y gráficos, el sistema está representado en planos en donde se muestra la ubicación de tuberías y dispositivos como rociadores automáticos.
Trabajo de suficiencia profesional
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Aguiar, Denilson José Marcolino de. "Estudo da formação e reversão de martensita induzida por deformação na austenita de dois aços inoxidáveis dúplex." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-03072013-112618/.
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No presente trabalho foram estudados os fenômenos de encruamento e, principalmente, a formação e reversão da martensita alfa-linha (a\', cúbica de corpo centrado, CCC, ferromagnética) induzida por deformação em um aço inoxidável dúplex UNS S31803 e um super dúplex UNS S32520. Inicialmente, as microestruturas dos dois materiais na condição solubilizada foram caracterizadas com auxílio de várias técnicas complementares de análise microestrutural. Foram determinadas fração volumétrica, estrutura cristalina, composição química, tamanho e morfologia das duas fases (ferrita e austenita). Posteriormente, os dois aços foram deformados por dois métodos: a laminação a frio, dividida em vários estágios, com menores graus de deformação e a limagem, sendo que o cavaco limado resultante apresenta altos graus de deformação. Algumas amostras deformadas foram recozidas. Os fenômenos de encruamento, formação e reversão de martensita induzida por deformação na austenita, recuperação, recristalização da austenita e da ferrita no cavaco limado foram estudados predominantemente por difratometria de raios X e usando o método de Rietveld. A difratometria de raios X também foi utilizada para determinação das microdeformações residuais e tamanhos de cristalito (subgrão), calculadas a partir do alargamento dos picos de difração causado pelas deformações. Desta forma, puderam-se comparar os níveis de deformação da laminação e limagem. Qualitativamente, a formação e reversão da martensita induzida por deformação também foi estudada por meio de medidas magnéticas utilizando-se dados de saturação magnética das curvas de histerese obtidas com o auxílio de um magnetômetro de amostra vibrante. Observou-se que para o aço inoxidável dúplex, tanto a laminação quanto a limagem causaram a formação de martensita induzida por deformação e para o aço inoxidável super dúplex, apenas a limagem promoveu essa transformação. Em comparação com o aço dúplex, o aço super dúplex apresentou maior resistência à formação de martensita induzida por deformação, pois apresenta uma austenita mais rica em nitrogênio e uma maior propensão à formação de fase sigma durante o recozimento, pois apresenta uma ferrita mais rica em cromo e nitrogênio.In the present work the phenomena of strain hardening, formation and reversion of the strain induced alpha-prime martensite (a\', body centered cubic, BCC, Ferromagnetic) in an UNS S31803 duplex and UNS S32520 super duplex stainless steels have been studied. Firstly, the microstructures of both materials in the solution annealed condition were characterized with the aid of several microstructural analysis complementary techniques. The volume fraction, crystalline structure, chemical composition, size and morphology of the two phases (ferrite and austenite) have been determined. Further, both steels were deformed by two methods: cold rolling, divided into several stages, with lower strain levels than filing, which the chips resulting had higher strain levels. The phenomena of strain hardening, formation and reversion of strain induced martensite in the austenite phase, recovery and recrystallization of austenite and ferrite phases have been studied, mainly using X-ray diffraction and the Rietveld method. X-ray diffraction was also used to determine the residual microstrain and crystallite size (sub grain), calculated from the diffraction peak broadening caused by straining. Thus, the levels of cold rolling and filing strains could be compared. Qualitatively, the formation and reversion of strain induced martensite was also studied by magnetic measurements using data from magnetic saturation of hysteresis curves obtained with the aid of a vibrating sample magnetometer. It has been observed that for the duplex stainless steel, both filing as well as cold rolling promoted strain induced martensite. On the other hand, for the super duplex stainless steel, just filing promoted this transformation. In the comparing with duplex, the super duplex stainless steel austenite is more stable that is why is richer in nitrogen, so, the strain induced martensite formation is more difficult. The easier sigma phase precipitation during annealing as well in the super duplex stainless steel is due higher levels of chrome and molybdenum than the duplex stainless steel.
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Videira, Arthur Moraes e. [UNESP]. "Influência do aporte térmico da soldagem GTAW no balanço de fases Ferrita/Austenita do Aço Inoxidável Duplex UNS S32205." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/136319.
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O emprego de aços inoxidáveis duplex na indústria atual vem aumentando devido as suas características que combinam boas propriedades mecânicas e de resistência à corrosão. Esses aços são constituídos por uma estrutura bifásica com frações volumétricas de 50% ferrita e 50% austenita. Portanto, o desenvolvimento de técnicas para melhorar a soldagem dos aços duplex se faz necessário, de modo a garantir que o balanço de fases e as propriedades do material não sejam severamente prejudicados neste processo. Este trabalho tem o objetivo de caracterizar juntas soldadas com o processo GTAW (Gas Tungsten Arc Welding) no aço inoxidável duplex UNS S32205. Foram realizadas soldagens na condição autógena com aporte térmico variando entre 261,00 J/mm e 652,50 J/mm. Seguiu-se com a análise do metal base e dos cordões de solda mediante ensaios de dureza Vickers, EDS (Espectroscopia por Dispersão de Energia), microscopia eletrônica de varredura (MEV) e microscopia óptica (MO). Os resultados apresentaram a região do metal de solda com fração volumétrica de austenita variando entre de 21,71% e 33,89%. Essa variação se deve às menores taxas de resfriamento dos aportes térmicos com valores maiores, que permitem uma maior formação de austenita. Quanto a geometria do cordão, foi observado que valores maiores de aporte térmico, provocaram cordões mais largos e profundos, variando entre 3,9 e 5,9 mm de largura e 0,65 a 1,29 mm de profundidade. Na zona termicamente afetada mais próxima do metal de solda, a dureza Vickers apresentou valores maiores que o metal base, devido a presença de maior percentual de ferrita nessa região. Não se identificou a presença de fases frágeis no material.
The use of duplex stainless steels in industry is increasing due to their characteristics that combine good mechanical and corrosion resistance properties. These steels are comprised of a biphasic structure volume fraction of 50% ferrite and 50% austenite. Therefore, the development of techniques to improve the welding of duplex steels it is necessary, in order to ensure that the phase balance and the material properties are not severely harmed in the process. This work aims to characterize welded joints with the GTAW process in UNS S32205 duplex stainless steel. Autogenous welds were performed with heat input ranging from 261.00 J/mm and 652.50 J/mm. The next step was the analysis of base metal and weld beads by Vickers hardness testing, EDS, electronic and optical microscopy. The results showed the weld metal region with volume fraction of austenite ranging between 21.71% and 33.89%. This variation is due to the lower cooling rates of high heat input values, wich allow a greater formation of austenite. About the geometry, it was observed that higher values of heat input, led to wider and deeper welded joints, ranging between 3.9 and 5.9mm width and 0.65 and 1.29mm depth. In the nearest heat affected zone of the weld metal, Vickers hardness showed higher values than the base metal due to the presence of higher percentage of ferrite. Was not identified brittle phases in the material.
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Videira, Arthur Moraes e. "Influência do aporte térmico da soldagem GTAW no balanço de fases Ferrita/Austenita do Aço Inoxidável Duplex UNS S32205 /." Ilha Solteira, 2016. http://hdl.handle.net/11449/136319.
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Orientador: Vicente Afonso VentrellaResumo: O emprego de aços inoxidáveis duplex na indústria atual vem aumentando devido as suas características que combinam boas propriedades mecânicas e de resistência à corrosão. Esses aços são constituídos por uma estrutura bifásica com frações volumétricas de 50% ferrita e 50% austenita. Portanto, o desenvolvimento de técnicas para melhorar a soldagem dos aços duplex se faz necessário, de modo a garantir que o balanço de fases e as propriedades do material não sejam severamente prejudicados neste processo. Este trabalho tem o objetivo de caracterizar juntas soldadas com o processo GTAW (Gas Tungsten Arc Welding) no aço inoxidável duplex UNS S32205. Foram realizadas soldagens na condição autógena com aporte térmico variando entre 261,00 J/mm e 652,50 J/mm. Seguiu-se com a análise do metal base e dos cordões de solda mediante ensaios de dureza Vickers, EDS (Espectroscopia por Dispersão de Energia), microscopia eletrônica de varredura (MEV) e microscopia óptica (MO). Os resultados apresentaram a região do metal de solda com fração volumétrica de austenita variando entre de 21,71% e 33,89%. Essa variação se deve às menores taxas de resfriamento dos aportes térmicos com valores maiores, que permitem uma maior formação de austenita. Quanto a geometria do cordão, foi observado que valores maiores de aporte térmico, provocaram cordões mais largos e profundos, variando entre 3,9 e 5,9 mm de largura e 0,65 a 1,29 mm de profundidade. Na zona termicamente afetada mais próxima do metal de sold... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The use of duplex stainless steels in industry is increasing due to their characteristics that combine good mechanical and corrosion resistance properties. These steels are comprised of a biphasic structure volume fraction of 50% ferrite and 50% austenite. Therefore, the development of techniques to improve the welding of duplex steels it is necessary, in order to ensure that the phase balance and the material properties are not severely harmed in the process. This work aims to characterize welded joints with the GTAW process in UNS S32205 duplex stainless steel. Autogenous welds were performed with heat input ranging from 261.00 J/mm and 652.50 J/mm. The next step was the analysis of base metal and weld beads by Vickers hardness testing, EDS, electronic and optical microscopy. The results showed the weld metal region with volume fraction of austenite ranging between 21.71% and 33.89%. This variation is due to the lower cooling rates of high heat input values, wich allow a greater formation of austenite. About the geometry, it was observed that higher values of heat input, led to wider and deeper welded joints, ranging between 3.9 and 5.9mm width and 0.65 and 1.29mm depth. In the nearest heat affected zone of the weld metal, Vickers hardness showed higher values than the base metal due to the presence of higher percentage of ferrite. Was not identified brittle phases in the material.
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Borsato, Karin Soldatelli. "Caracterização microestrutural e de propriedades mecânicas de chapas espessas de aço inoxidável duplex UNS 31803, submetido a ciclos térmicos de soldagem." Florianópolis, SC, 2001. http://repositorio.ufsc.br/xmlui/handle/123456789/79465.
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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia MecânicaMade available in DSpace on 2012-10-18T04:20:28Z (GMT). No. of bitstreams: 0Bitstream added on 2014-09-25T20:52:33Z : No. of bitstreams: 1 181512.pdf: 59498738 bytes, checksum: e902ba758060acae90c9cb4734998fe9 (MD5)
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Yoshimoto, Yui, Yoshiyuki Karuno, and Shinji Imahori. "Dynamic Programming Algorithms for Duplex Food Packing Problems." IEEE, 2010. http://hdl.handle.net/2237/14459.
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Alsarraf, Jalal. "Hydrogen embrittlement susceptibility of super duplex stainless steels." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/4562.
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This thesis describes the metallurgical and environmental factors that influence hydrogen embrittlement of super duplex stainless steels and presents a model to predict the rate at which embrittlement occurs. Super duplex stainless steel has an austenite and ferrite microstructure with an average fraction of each phase of approximately 50%. An investigation was carried out on the metallurgical and environmental factors that influence hydrogen embrittlement of super duplex stainless steels. Tensile specimens of super duplex stainless steel were pre-charged with hydrogen for two weeks in 3.5% NaCl solution at 50º C at a range of applied potentials to simulate the conditions that exist when subsea oilfield components are cathodically protected in seawater. The pre-charged specimens were then tested in a slow strain rate tensile test and their susceptibility to hydrogen embrittlement was assessed by the failure time, reduction in cross-sectional area and examination of the fracture surface. The ferrite and austenite in the duplex microstructures were identified by analysing their Cr, Ni, Mo and N contents in an electron microscope, as these elements partition in different concentrations in the two phases. It was shown that hydrogen embrittlement occurred in the ferrite phase, whereas the austenite failed in a ductile manner. An embrittled region existed around the circumference of each fracture surface and the depth of this embrittlement depended on the hydrogen charging time and the potential at which the charging had been carried out. The depth of embrittlement was shown to correlate with the rate of hydrogen diffusion in the alloy, which was measured electrochemically using hydrogen permeation and galvanostatic methods. A two-dimensional diffusion model was used to calculate the hydrogen distribution profiles for each experimental condition and the model could be employed to provide predictions of expected failure times in stressed engineering components.
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Negrat, A. "Implementation strategy for single-frequency duplex radio telephone." Thesis, Swansea University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638307.
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A two-way link is a very desirable requirement for conversational communications. The design of such link should account for any restraints to avoid interruption, during information exchange between two parties. In this thesis, a single carrier frequency scheme is introduced to provide a concurrent two-way communication. The system uses an analogue mode (single-frequency duplex), receiving of f1 whilst also transmitting on the same frequency. In this method, both the transmitter and receiver operate in such a manner that their signal appears to all intents and purposes simultaneously, permitting a normal two-way conversation to take place. This technique is a potential step forward towards an alternative form for point-to-point communication systems. The main contributions of this thesis are outlined below: • the concept of single-frequency duplex system has been introduced. The demonstration of this concept has been achieved by implementing a new system. • Mathematical analysis is introduced as a way of understanding the gating waveform of FM signal, and to investigate the effect of bandwidth and distortion on the quality of the signal. An FM signal with high modulation index, theoretically has infinite bandwidth; on the one hand, any band limiting will cause distortion; on the other hand, putting two FM signals next to each other in the frequency band, and not band limiting them will cause mutual interference. Gating the FM signal ON/OFF was demonstrated by experiment in this work. • A comparative study of cordless telephones world-wide was made. This study gives an overview of major system elements, and to show clear understanding of concurrent two-way communication, either of Frequency Division Duplex (FDD) or Time Division Duplex (TDD).
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Bruce, Greg. "An investigation of duplex perception with musical triads." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368285.
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Duplex perception (DP) occurs when a stimulus simultaneously contributes to the perception of two auditory events (Rand, 1974), thus violating the principle of exclusive allocation. One interpretation of DP is that it is the consequence of independent auditory modules [speech/music vs. acoustical] of which one `mode' [phonetic/musical] has `perceptual precedence' (Liberman and Mattingly, 1989). The more common scene analysis view is that DP is the consequence of competing cues for organisation (Bregman, 1987,1990). This thesis attempted to explore DP with musical triads. It was found that tonal fusion was affected when triads were presented dichotically. Secondly, these `duplexed' triads evinced a trade-off between mode and note performance, modulated by presentation (monaural vs. dichotic). Thirdly, sequential grouping had no effect on DP. Fourthly, the relative timing of the notes in a chord had little effect on tonal fusion or DP. Finally, there was no evidence for subliminal tonal fusion, which contradicted the notion of perceptual precedence in DP. Although the findings support the idea that DP is the product of competing cues (e. g. spatial location vs. musical schemas), the insensitivity of triads to temporal-sequential organisation highlights important differences between DP with speech and music.