Dissertationen zum Thema „Arcpi“
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1
Jomaa, Modar. „Contribution à l'étude d'un système de dégivrage piézoélectrique pour l'aéronautique : actionnement vibratoire et alimentation de puissance HF adaptée“. Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST058.
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Les contraintes environnementales, ainsi que leur impact sur l'opinion publique, ont conduit les équipementiers aéronautiques à accélérer la transition énergétique en aéronautique à travers l'avion plus électrique (More Electric Aircraft - MEA). Nous assistons donc à une augmentation progressive de la place de l'énergie électrique dans les applications embarquées. Ceci se traduit par une tendance à remplacer les systèmes non propulsifs (hydrauliques et pneumatiques) par des chaînes de conversion électromécanique. Ces sous-systèmes sont en effet souvent plus performants, dynamiques et précis avec des délais de maintenance plus courts que leurs équivalents hydrauliques. Le système de dégivrage est un candidat de choix pour cette transition.L'accumulation de glace sur les aéronefs a été reconnue comme risque majeur dans le domaine de l'aéronautique dès le début du XX^e siècle. Les solutions actuellement utilisées en vol, telles que le flux d'air chaud, les boudins pneumatiques, les systèmes électrothermiques, le fluide chimique ou les systèmes électromécaniques impulsifs/expulsifs, offrent une protection plus ou moins efficace, mais présentent des inconvénients tels qu'une consommation d'énergie significative, un encombrant ou une applicabilité limitée à certains types d'aéronefs. De plus, dans le cadre des avions plus électriques, les systèmes dépendants des moteurs thermiques sont susceptibles de devenir obsolètes, ouvrant ainsi la voie à de nouveaux systèmes électriques.Le système électromécanique piézoélectrique de protection contre le givre s'est récemment révélé pertinent en termes de consommation d'énergie et de masse embarquée, et fait l'objet de cette thèse. Celle-ci se concentre sur la conception d'un système de dégivrage piézoélectrique résonnant, ainsi que sur son alimentation associée. Ce système repose sur l'utilisation des actionneurs piézoélectriques pour exciter la structure à dégivrer à une fréquence donnée. Lorsque cette fréquence correspond aux fréquences naturelles de la structure, l'amplitude des vibrations augmente, générant des niveaux élevés de contraintes et de déformations, dépassant éventuellement les résistances critiques de la glace (traction/compression, adhésion ou les deux).L'objectif de cette thèse est donc de développer d'un premier temps un prototype capable de démontrer une protection efficace et rapide contre le givre avec une consommation d'énergie minimale. Pour ce faire, une méthodologie de positionnement et de pilotage des actionneurs est proposée, utilisant une analyse analytique et modale par éléments finis pour identifier les modes de résonance les plus contributifs au dégivrage. Une validation expérimentale en plusieurs étapes afin d'arriver à un prototype de dégivrage opérationnel est assurée.Dans un second temps, l'accent est mis sur le développement d'une alimentation de puissance adaptée aux actionneurs piézoélectriques dans le cadre du dégivrage piézoélectrique. Compte tenu de la dépendance du comportement électrique des actionneurs à la charge mécanique et à la température, certains aspects doivent être pris en compte lors de la conception de l'alimentation électrique. Une recherche exhaustive dans la littérature est entreprise pour identifier les topologies appropriées pour piloter des charges piézoélectriques, conduisant à la proposition de la topologie ARCPI-LLCC. Cette dernière offre des avantages significatifs en termes de performances globales du système, notamment en termes de compensation de l'énergie réactive et de réduction du taux de distorsion harmonique.Enfin, l'ARCPI-LLCC est utilisée pour piloter le prototype de dégivrage conçu selon la méthodologie proposée. Les résultats obtenus démontrent un dégivrage opérationnel avec un rendement optimisé, validant ainsi l'efficacité de la technologie de dégivrage piézoélectrique dans le contexte de l'électrification des avionsEnvironmental constraints and their impact on public opinion have led the aircraft industry to accelerate the energy transition in aeronautics toward a "More Electric Aircraft" (MEA). Therefore, we are witnessing a gradual increase in the role of electrical energy in onboard applications. This electrification trend aims to replace all non-propulsive systems (hydraulic and pneumatic) with electromechanical alternatives in order to optimize aircraft performance, decrease operating and maintenance costs, increase dispatch reliability, and reduce gas emissions. Among the systems affected by this transition is the deicing system. The deicing system is a prime candidate for this transition.Ice accumulation on aircraft has been recognized as a major risk in aviation since the early 20th century. Currently employed in-flight solutions, such as hot air flow, pneumatic boots, electrothermal systems, chemical fluid, or impulsive/expulsive electromechanical systems, offer varying degrees of effectiveness but come with drawbacks such as significant energy consumption, bulkiness, or limited applicability to certain aircraft types. Furthermore, within the context of more electric aircraft, systems dependent on thermal engines are most likely to become obsolete, paving the way for new electrical systems.The electromechanical piezoelectric ice protection system has recently proven to be relevant in terms of energy consumption and integration and is the focus of this thesis. It concentrates on the design of a resonant piezoelectric deicing system and its associated power supply. This system relies on the use of piezoelectric actuators to excite the structure to be deiced at a given frequency. When this frequency matches the natural frequencies of the structure, the magnitude of vibration increases, generating high levels of stress and deformation, eventually exceeding the critical strengths of the ice (traction/compression, adhesion, or both).The objective of this thesis is to develop, initially, a prototype capable of demonstrating efficient and rapid ice protection with minimal energy consumption. To achieve this, a methodology for positioning and controlling the actuators is proposed, utilizing analytical and modal finite element analysis to identify the most contributing resonance modes to deicing. Experimental validation through several stages is ensured to obtain an operational deicing prototype.Subsequently, emphasis is placed on the development of a power supply tailored to piezoelectric actuators for deicing purposes. Given the dependence of the electrical behavior of actuators on mechanical load and temperature, certain aspects must be considered when designing the electrical power supply. An exhaustive literature search is conducted to identify suitable topologies for driving piezoelectric loads, leading to the proposal of the ARCPI-LLCC topology. The latter offers significant advantages in terms of overall system performance, particularly in reactive energy compensation and harmonic distortion reduction.Finally, the ARCPI-LLCC is employed to drive the deicing prototype designed according to the proposed methodology. The results demonstrate operational deicing with optimized efficiency, thus validating the effectiveness of piezoelectric deicing technology in the context of aircraft electrification
2
Popa, John C. „Archi[tech]: Materializing Immaterial Data Streams“. University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1397734789.
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Louisnathan, Bernard Raj. „TECTURE: A Nonlinear Retrospect“. Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32404.
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The nature of this hierarchical progression in design can be described as a triadic composition, where this composition has a relationship between one component to the next as a simultaneous progression. The first component plays a major role to the intermediate component, and the intermediate one plays a role to the last component, and finally the last component plays a major role to the first forming the triad. This can be applied into an operational mode of making or designing something. This tool for design studies helps to observe compositions, functional applications, and theoretical constructs. One example is on the structural level. It is critical to utilize systems and subsystems as they relate to the entire project.Master of Science
4
Yeo, Sun jung. „Filmer l'architecture. Description archi-tectonique chez Peter Greenaway“. Thesis, Paris 3, 2012. http://www.theses.fr/2012PA030164.
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Comment filmer l’architecture, comment la décrire par une surface ? L’altérité de l’architecture à l’écran, avec ses espaces et ses opérations propres, pose les problèmes esthétiques dans l’ordre de la perceptibilité. En redéfinissant l’architectonique en relation avec les pensées modernes de la tectonique architecturale, je cherche à repérer ces problèmes esthétiques afin de nommer la description filmique de l’architecture élaborée chez Greenaway. La tectonique de Bötticher porte sur la démonstration ornementale des relations structurelles, spatiales et sensibles, alors que l’architectonique révisée de Boullée pense à la structure et à ses relations fortes. Mise en parallèle à une évolution historique du beau architectonique à l’ornement tectonique, la description de l’architecture de Greenaway n’assure pas seulement une persévérance de l’idée d’harmonie, mais donne à voir une surédification dynamique, définie par l’obliquité et la périphéricité dans un travail de la figurabilité. La description archi-tectonique consiste dans la démonstration perceptible et hypothétique, de forces structurelles et de connexions topologiques. Mouvementée par l’épreuve de la désharmonie appartenant au monde de la matière, des forces et des sens, la description de Greenaway se formule par le montage analogique, le cadrage chronotopique, la rotation géométrique et la grille en mouvanceHow to film architecture, how to describe it on surface ? The otherness of the architecture on screen, with its own space and function, raise the aesthetic problems from the perspective of perceptibility. Redefining architectonic in relation to modern thought on architectural tectonic, I attempt to locate these aesthetic problems in order to name the filmic description of the architecture elaborated in Peter Greenaway. Bötticher’s tectonics focuses on the ornamental demonstration of structural, spatial and sensitive relationships, while Boullée’s revised architectonic think the structure and its relationships of forces. Considered with the historical evolution from the architectonic beauty to the tectonic ornament, the description of architecture by Greenaway maintains not only a persistence of the idea of harmony but makes sensible a dynamic suredification characterized by obliquity and periphericity in a work of figurability. The archi-tectonic description is based on the the perceptible and hypothetical demonstration of structural forces and topological connections. Animated by the confrontation with disharmony in a world of matter, forces and senses, the description by Greenaway expresses itself through analogical editing, chronotopical framing, geometrical rotation and grid in movement
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com, wendyseana@yahoo, und Wendy Seana Blake. „Archi-texture : meditations on the mediations of dwelling“. Murdoch University, 2004. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061019.153354.
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This thesis is an inter-disciplinary and inter- cultural exploration of home as understood as the place in which we usually live. Empirical research in an Australian suburb and an Indian town provide the fabric from which cultural studies engages with phenomenology to produce a design used to cut and style this exploration. Motivated by an interest in what threads contribute to the weave of contemporary household dwelling, this thesis revisits the two questions used by Heidegger to frame his essay Building Dwelling Thinking: What is it to dwell? and How does building belong to dwelling? It is an inquiry committed to its respondents as bearers and representatives of structures of feeling circulating within the socio-cultural milieu or habitus in which they live and engage with the idea of home. This inquiry offers an exploration of the chief constituent mediums of home which I call its archi-texture. As such, it looks at location, physical and material attributes, domestic technology and household membership as framed by the presence or absence of a family. This thesis is almost certainly the only example of an empirically grounded examination of Heideggers ontological exposition of dwelling. Hence I position it as a meditation on the mediations of dwelling rather than a judgmental critique, although in no sense do I believe it to be either a dispassionate position nor an impartial digest of the research material.
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Blake, Wendy Seaná. „Archi-texture : meditations on the mediations of dwelling /“. Access via Murdoch University Digital Theses Project, 2004. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061019.153354.
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Blake, Wendy Seana. „Archi-texture: meditations on the mediations of dwelling“. Thesis, Blake, Wendy Seana (2004) Archi-texture: meditations on the mediations of dwelling. PhD thesis, Murdoch University, 2004. https://researchrepository.murdoch.edu.au/id/eprint/368/.
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This thesis is an inter-disciplinary and inter- cultural exploration of home as understood as the place in which we usually live. Empirical research in an Australian suburb and an Indian town provide the fabric from which cultural studies engages with phenomenology to produce a design used to cut and style this exploration. Motivated by an interest in what threads contribute to the weave of contemporary household dwelling, this thesis revisits the two questions used by Heidegger to frame his essay 'Building Dwelling Thinking': What is it to dwell? and How does building belong to dwelling? It is an inquiry committed to its respondents as bearers and representatives of 'structures of feeling' circulating within the socio-cultural milieu or habitus in which they live and engage with the idea of 'home'. This inquiry offers an exploration of the chief constituent mediums of home which I call its 'archi-texture'. As such, it looks at location, physical and material attributes, domestic technology and household membership as framed by the presence or absence of a family. This thesis is almost certainly the only example of an empirically grounded examination of Heidegger?s ontological exposition of dwelling. Hence I position it as a meditation on the mediations of dwelling rather than a judgmental critique, although in no sense do I believe it to be either a dispassionate position nor an impartial digest of the research material.
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Blake, Wendy Seana. „Archi-texture: meditations on the mediations of dwelling“. Blake, Wendy Seana (2004) Archi-texture: meditations on the mediations of dwelling. PhD thesis, Murdoch University, 2004. http://researchrepository.murdoch.edu.au/368/.
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This thesis is an inter-disciplinary and inter- cultural exploration of home as understood as the place in which we usually live. Empirical research in an Australian suburb and an Indian town provide the fabric from which cultural studies engages with phenomenology to produce a design used to cut and style this exploration. Motivated by an interest in what threads contribute to the weave of contemporary household dwelling, this thesis revisits the two questions used by Heidegger to frame his essay 'Building Dwelling Thinking': What is it to dwell? and How does building belong to dwelling? It is an inquiry committed to its respondents as bearers and representatives of 'structures of feeling' circulating within the socio-cultural milieu or habitus in which they live and engage with the idea of 'home'. This inquiry offers an exploration of the chief constituent mediums of home which I call its 'archi-texture'. As such, it looks at location, physical and material attributes, domestic technology and household membership as framed by the presence or absence of a family. This thesis is almost certainly the only example of an empirically grounded examination of Heidegger?s ontological exposition of dwelling. Hence I position it as a meditation on the mediations of dwelling rather than a judgmental critique, although in no sense do I believe it to be either a dispassionate position nor an impartial digest of the research material.
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Cahuzac, Jacques. „Application du questionnaire psychométrique ARCI chez l'alcoolodépendant“. Bordeaux 2, 1990. http://www.theses.fr/1990BOR25250.
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Cora, Elisa. „Analyses structurales et fonctionnelles de la voie des ARNpi“. Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENV002.
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Les ARNs interagissant avec Piwi (ARNpi ou piRNA en anglais pour Piwi-interacting RNAs) interagissent avec les protéines de la branche PIWI de la famille des Argonautes. Ils participent à la répression des transposons dans la ligne germinale. Les ARNpi sont produits à partir de deux mécanismes: la biogenèse primaire et le cycle d'amplification Ping-Pong. Plusieurs questions fondamentales sur la biogenèse et la fonction des piRNAs sont encore ouvertes. Le travail de ce mémoire est concentré sur deux caractéristiques au niveau de la séquence dans les populations des ARNpi, le U1-biais et le biais de brin, dont les origines restent mystérieuses. Nos analyses ont révélé de nouvelles fonctions au protéines Piwi, dont les domaines MID et PIWI jouent un rôle essentiel dans la définition des deux biais. La structure cristalline du domaine MID de MIWI montre que l'uridine peut être favorisé comme premier nucléotide au niveau de l'extrémité 5' des ARNpi. De la même manière, nos résultats obtenus grâce aux études in vivo des protéines Piwi de Bombyx mori démontrent que le module MID-PIWI est essentiel pour déterminer le bias de brin des ARNpi s'associant avec les protéines Piwi. De plus, nous avons confirmé le rôle de la méthylation de la région N-terminale des protéines Piwi pour leur localisation dans la cellule. Ensemble, ces résultats offrent de nouveaux détails pour la compréhension de la biogenèse des ARNpi.Les protéines Piwi ne sont pas les seuls composants dans la voie des ARNpi. Des tests génétiques ainsi que des analyses biochimiques ont identifié plusieurs éléments impliqués dans la voie des ARNpi, cependant leurs fonctions restent obscures. J'ai étudié la protéine Vreteno, contenant des domaines Tudor, qui est impliquée dans le processus de biogenèse primaire des ARNpi. En utilisant la lignée cellulaire BmN4, nous avons identifié in vivo un complexe contenant Vreteno, des longues molécules d'ARN antisens, pouvant representer les précurseurs des ARNpi associés avec Siwi, ainsi que d'autres composants de la voie ARNpi, comme Ago3, BmTdrd12 et Spindle-E. De plus amples analyses sont nécessaires pour comprendre les fonctions de Vreteno dans la voie des ARNpi.Enfin, nous avons également étudié le rôle de l'hélicase à ARN Vasa dans la voie des piRNAs. Nos résultats démontrent que Vasa assemble un complexe régulé par l'ATP sur le ARN messager des transposons, afin de produire de nouveaux ARNpi secondaires avec orientation sens. En étudiant les différentes étapes de la voie des ARNpi, nos analyses ont fourni des informations importantes pour la compréhension de la biogénèse des ARNpiPiwi-interacting RNAs (piRNAs) associate to members of the PIWI clade of Argonaute proteins and are responsible for silencing of transposable elements in animal germ lines. piRNAs are produced through two biogenesis pathways, known as primary processing and Ping-Pong amplification cycle. There are many fundamental questions regarding piRNA biogenesis and function that are unsolved. In this thesis I have been focusing on the presence of two sequences features in piRNA populations, the U1-bias and the strand-bias, whose determination is not understood. Our analyses have revealed new features of the Piwi proteins, whose MID and PIWI domains play an essential role in the definition of both piRNA biases. The crystal structure of the MID domain of MIWI shows that uridine can be favored as the first nucleotide at the 5' end, while our in vivo results on Bombyx mori Piwi proteins demonstrate that the MID-PIWI module is essential to determine the strand bias of piRNAs that associate to the Piwi protein. Moreover we have confirmed the role of the methylation status of the N-terminus of Piwi protein for determining their localization. Altogether these findings provide new insights in the understanding of piRNA biogenesis.Piwi proteins are not the only components acting in the piRNA pathway. Genetic screenings and biochemical analyses have identified several other factors, which have been involved in the piRNA pathway, but whose functions remain elusive. I have focused on the Tudor domain-containing protein Vreteno, which has been involved in the primary biogenesis pathway. Using BmN4 cells, we have identified an in vivo complex of Vreteno, containing long antisense RNA molecules, which might represent the precursor of Siwi-piRNAs, and other piRNA known factors, like Ago3, BmTdrd12 and Spindle-E. Further analyses are required for the understanding of Vreteno functions in the piRNA pathway.Finally, we have also investigated the role of the RNA helicase Vasa in the piRNA pathway. Our results show that Vasa assembles an ATP-gated Ping-pong complex on transposon mRNAs to generate new sense-oriented secondary piRNAs. By looking at different step in the piRNA pathway our analyses have provided important insights for the understanding of the piRNA biogenesis
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Shrestha, Joseph, und H. David Jeong. „Automated Unit Price Visualization Using ArcPy Site Package in ArcGIS“. Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etsu-works/5474.
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State Departments of Transportation (DOTs) in the U.S. have an increasing amount of digital data from various sources. One such set of data is structured unit price data collected from bid lettings. Such data contain unit prices of thousands of bid items from hundreds of projects every year. While state DOTs have such data from over a decade-long period, utilizing such data has been challenging because of the lack of automated analytical and visualization methodologies and tools to generate meaningful and actionable insights. This study develops an automated methodology to quickly and accurately generate color-coded visualization maps representing unit price variation across a geographical region. It uses Inverse Distance Weighted (IDW) technique that is based on the Toblers First Law of Geography. The law states that points closer together in space are more likely to have a similar value than points that are farther away. The methodology is automated using ArcPy site package in ArcGIS. It imports unit price data from preformatted spreadsheets and boundary maps from existing ArcGIS shape files to generate unit price maps. The tool and the visualizations are expected to aid state DOTs in generating and communicating meaningful insights for making data-driven decisions. It can be used to investigate areas with higher unit prices for various items which can aid state DOTs in identifying potential causes of higher unit prices such as lack of competition and lack of sources of materials (e.g. quarry) in nearby locations.
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GABBRIELLI, FABIO. „Stereotomia degli archi e maesatranze: la chiesa dell'abbazia di San Galgano“. Doctoral thesis, Università IUAV di Venezia, 1997. http://hdl.handle.net/11578/278387.
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Kuo, Kelly Chien-hui. „Archi-cultural identity : reflections on critical regionalism in twentieth-century Taiwanese architecture“. Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288757.
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Cancelli, Mariangela. „Il problema del debonding FRP-muratura nel rinforzo di archi con materiali compositi“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amslaurea.unibo.it/324/.
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Rothwell, Charlotte Ruth. „A study to identify the factors that either facilitate or hinder medical specialty trainees in their Annual Review of Competence Progression (ARCP), with a focus on adverse ARCP outcomes“. Thesis, Durham University, 2017. http://etheses.dur.ac.uk/12181/.
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Background: Specialty training is a stressful period in medical training. Trainees must work in a busy clinical environment and meet their training competencies. Trainees must complete an annual review to ensure that they are competent to pass to the next level of training. This thesis is interested in why some trainees (5%) have difficulties progressing through their training. Factors which impact on trainees’ performance are complex and multiple in nature. It may start with their personality or country of graduation (or both). Secondly, it may be that trainees have not received adequate feedback and this has contributed to their underperformance or, thirdly, the service demands and work intensity impact on a trainee’s ability to progress. An in-depth understanding of the factors and how they interact with each other and impact on trainees underperforming is needed. Aim: This thesis set out to identify the factors that either facilitate or hinder medical specialty trainees in their Annual Review of Competence Progression (ARCP), with a focus on adverse ARCP outcomes. Methods: Research was conducted across three phases. Phase One was a retrospective observational study investigating which trainees had difficulty progressing through their ARCPs (over a five year period). Phase Two was a systematic literature review to identify indicators that are associated with doctors who experience difficulties with progressing during their specialty training. Phase Three involved a constructivist Grounded Theory study to provide further understanding about what helped or hindered ARCP outcomes. Results: Findings from Phase One identified that trainees who were older, male or had qualified overseas were found to be at a greater risk of receiving adverse ARCP outcomes. Phase Two identified seven indicators from the literature, these were: overseas graduates and ethnicity, age, gender, personality traits, financial issues, trainee background and issues related to the organisation. Phase Three involved semi-structured interviews with trainees (n=21) and trainers (n=57). Interviews identified risk factors and enablers to progressing through specialty training. The three core categories identified were: individual, training environment and society. Associated risks and enablers were also identified under each of these three core categories. The overall core category, which emerged from the data and explained why trainees had difficulties progressing was focused on a conflict of values. A ‘values model’ was developed to explain why trainees fail their ARCPs. Discussion: The synthesis of all Phases of this thesis, informed the development of a ‘circuit’ model that identified the barriers and enablers to trainee progression (Phase Four). In addition, a screening tool was devised to help Trusts with the early identification of trainees most at risk of adverse ARCP outcomes, and ensure enabling factors are made available to support trainees. Conclusion: This thesis has identified why trainees fail ARCPs (conflict in values), the barriers and enablers to progression and has developed a tool to support the early identification of trainees most at risk.
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Moreira, Da Silva Sara. „Caractérisation de NEF-sp : une exoribonucléase 3'→ 5' spécifique du testicule“. Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAV042/document.
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Caractérisation de NEF-sp: une exoribonucléase 3'→ 5' spécifique du testicule. Les études biochimiques et génétiques ont révélé que de nombreuses protéines jouent un rôle important dans la voie des ARNpi (ARN interagissant avec Piwi). Néanmoins, certaines caractéristiques mécanistes ne sont pas encore complètement comprises. D’autre part, certaines protéines impliquées dans la voie des ARNpi pourraient ne pas encore être caractérisées. Lorsque ce projet a commencé, le traitement 3’ des ARNpi n'avait pas été complètement identifié. Par contre la directionnalité 3’ à 5’ avait été observée avec une dépendance au Mg2+. Toutefois, la protéine responsable du raccourcissement des ARNpi à leur longueur mature n'était toujours pas connue.NEF-sp devrait être une exo nucléase d'ARN avec une directionnalité de 3' à 5'. Sa prédiction de domaine a révélé que cela se compose d'un domaine de nucléase N-terminal et de deux motifs de reconnaissance d'ARN (RRM). NEF-sp est également prévue comme une nucléase spécifique aux testicules, mais son rôle biologique n'a pas été caractérisé auparavant. Ce projet s'est concentré sur une hypothèse initiale selon laquelle NEF-sp pourrait potentiellement agir comme une nucléase impliquée dans la voie des ARNpi.Globalement, nous avons démontré que NEF-sp humaine est une exoribonucléase avec une directionnalité 3'→ 5'qui est active sur les substrats de l'ARN simple brin. Cette protéine est exprimée exclusivement dans les testicules des souris. En plus, NEF-sp pourrait fonctionner dans le compartiment nucléaire. Notre analyse de la souris Nef-sp mutante n'a révélé aucun phénotype évident. Nous avons observé que les homozygotes des deux sexes sont viables et présentent une fertilité normale. De plus, NEF-sp ne semble pas jouer un rôle dans la voie des ARNpi. Il est possible que le recadrage du/des substrat(s) inconnu(s) ne soit pas important pour la viabilité et fertilité en raison de la compensation potentielle par d'autres nucléases. Néanmoins, notre étude fournit une caractérisation biochimique et génétique de l'exoribonucléase NEF-sp des mammifèresGenetic and biochemical studies have identified more than twenty different proteins involved in the piRNA pathway. However, some mechanistic features are still not fully understood. When this project started, piRNAs 3' end trimming was not completely characterized. Trimming was observed before in BmN4 cells and an Mg2+-dependent 3′ to 5′ exonuclease was implicated in this process. However, the protein responsible for shortening piRNAs to their mature length was still not known.NEF-sp is predicted to be an RNA exonuclease with 3′ to 5′ directionality. This protein is composed by three domains: a nuclease domain at N-terminal and two RNA binding motifs at C-terminal. NEF-sp is also predicted to be a testis-specific nuclease, however its biological role was not previously characterized. This project was based on the hypothesis that NEF-sp could potentially act as a nuclease involved in the piRNA maturation.We examined the biochemical properties of the uncharacterized mammalian nuclease family member NEF-sp. We show that Nef-sp transcripts are detected exclusively in mouse testes. We demonstrate that hNEF-sp is a 3ʹ→5ʹ exoribonuclease that is active on ssRNA substrates and likely functions in the nucleolar compartment. Our own analysis of the Nef-sp mouse knock-out mutant revealed no obvious phenotype. We observed that homozygous animals of both sexes are viability and display normal fertility. NEF-sp does not seem to play a role in piRNA pathway. It is possible that precise trimming of the unknown substrate(s) may not be important for viability/fertility due to potential complementation by other nucleases. Nevertheless, our study provides a biochemical and genetic characterization of the mammalian NEF-sp exoribonuclease
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Cacchi, Sara. „Teorie di Ordine Superiore per l'Analisi Dinamica e Statica di Archi e Travi in Materiale Composito“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
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Il titolo, Teorie di Ordine Superiore per l’Analisi Dinamica e Statica di Archi e Travi in Materiale Composito, illustra il tema trattato e la prospettiva seguita nella scrittura del presente lavoro. Il suo scopo è quello di analizzare il comportamento statico e dinamico di travi rettilinee e curvilinee in materiale composito attraverso l’applicazione del Metodo Generalizzato di Quadratura Differenziale.
L’elaborato si suddivide in quattro capitoli, nei quali viene fornita la teoria relativa alla statica e alla dinamica degli elementi strutturali analizzati e vengono presentati i risultati delle applicazioni della tecnica numerica adottata.
In generale, un problema strutturale è descritto da equazioni differenziali e da opportune condizioni al contorno. Pertanto, non risulta sempre possibile determinare la soluzione analitica del fenomeno indagato, ciò è spesso dovuto alla geometria del problema o alla complessità delle condizioni al contorno che affiancano il sistema di equazioni governanti. Per questo motivo, in ambito ingegneristico vengono ampiamente sfruttate delle tecniche numeriche che consentono di trasformare il problema differenziale in un problema algebrico e di ottenere una soluzione approssimata ma comunque accettabile.
L’obiettivo principale di questo elaborato è quindi quello di proporre un approccio numerico per risolvere la formulazione forte delle equazioni fondamentali, ottenute tramite modelli strutturali di ordine superiore, in maniera efficiente, accurata e con un ridotto costo computazionale.
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Balembois, Stéphanie. „Ecrire en vain ? Le questionnement éthique dans Le jeu de patience, "archi-roman" de Louis Guilloux“. Phd thesis, Université Paris-Est, 2008. http://tel.archives-ouvertes.fr/tel-00432050.
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Quel impératif pousse Guilloux à se tourner vers les autres? Provient-il d'un appel au sentiment ? D'un appel à la raison ? Est-il la réponse à une éthique ? Pourquoi cette nécessité de rendre la vie valable ? La valeur d'un homme se juge d'après ses actes semble dire Guilloux. Qu'est-ce qu'écrire en regard de l'action ? Comment écrire dans un monde en guerre ? L'écriture peut-elle être agissante ? Guilloux a voulu partager ses interrogations avec ses lecteurs, esquisser tous les cheminements possibles jusqu'à la contradiction. D'abord, montrer le processus de mythification entourant les actions des hommes qui ont précédé Guilloux dans cette vie. Ceux d'avant savaient agir ensemble et pour le bien de tous, ce savoir s'est perdu laissant l'individu seul face à ses doutes. Les tourments qui agitent le début du XXème siècle n'ont fait qu'exacerber le questionnement existentiel. Les divers degrés de responsabilité des hommes se dévoilent ainsi dans leurs manières de se conduire vis-à-vis d'autrui, autant d'engagements concrets ou de retraits qui attestent de l'humanité ou de l'inhumanité: " Trop et pas assez d'intelligence - trop et pas assez d'amour ". Ni la famille, ni la société, jaugée au travers de ses institutions, l'école, la justice, le clergé, ne répondent plus à l'exigence d'équité. Alors c'est aux hommes de s'unir. Agir, pour Guilloux, semble une forme de révolte et d'indignation contre la souffrance et l'injustice. Lutter, c'est aussi veiller sur la vie des autres. En refusant toutes compromissions, les personnages que Guilloux met en scène voient leur champ d'action se réduire à l'action humanitaire, quant à l'auteur lui revient le devoir de témoigner. Il se lance alors dans une écriture labyrinthique, un incessant jeu de miroir qui rapproche les hommes les plus différents : l'homme d'action, l'homme de lettres, l'homme militant, l'homme pas cru, l'homme en difficulté, l'homme perdu... chacun explore, estime, selon son itinéraire, la valeur accordée à sa vie et à celles des autres, hanté toujours par le devoir et la volonté de changer le monde
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Mazzoleni, Marcello. „Sistema di navigazione indoor per edifici pubblici basato su punti di riferimento Dal filo al nodo d’Arianna“. Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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Spesso i visitatori di determinati edifici pubblici si trovano in una situazione di disorientamento, soprattutto se il luogo al quale accedono è a loro sconosciuto.
La funzione che tradizionalmente adempie un addetto alle informazioni, spesso non è sufficiente ad ottimizzare la visita che va dall’ingresso principale fino ad uno specifico punto dell’edificio (ufficio, ambulatorio, gate aeroportuale, sportello) e che faccia perdere il minor tempo possibile all’utente.
Mentre nel caso in cui ci trovassimo in una città a noi sconosciuta, la tecnologia già offre soluzioni affidabili per risolvere il problema dell’orientamento, come ad esempio l’utilizzo della tecnologia GPS, ormai presente su tutti i dispositivi mobili in commercio, non esistono altrettante soluzioni quando siamo all’interno di un edificio.
Fiumi d’inchiostro sono stati versati per esprimere il disagio di chi si trova in una situazione labirintica, in cui arrivare alla soglia di un edificio è in realtà solo una parte del tragitto necessario per raggiungere la propria meta.
Oggi tutti possiedono uno smartphone ed è quindi possibile creare delle soluzioni informatiche per risolvere il problema dell’orientamento anche all’interno degli edifici.
In questo documento viene trattato come l’utilizzo della tecnologia “Landmark-based navigation” o in italiano “navigazione per punti di interesse” possa aiutare in questi casi.
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Charton, Romain. „Étude du comportement de la chromatine, de la régulation de la transcription et réparation des gènes de l’ARNr avant la réplication de l’ADN et assemblage de la réparation par excision de nucléotides chez Saccharomyces cerevisiae“. Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/9527.
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Résumé : Le nucléole est considéré comme étant une « usine » à produire des ribosomes. Cette production est la fonction la plus énergivore de la cellule. Elle met en jeu les trois ARN polymérases et représente 80% de l’activité de transcription au sein d’une cellule. Les trois quarts de cette activité de transcription correspondent à la synthèse des ARNr par l’ARN polymérase I (ARNPI). Ainsi mieux comprendre les mécanismes cellulaires se déroulant à l’intérieur de ce compartiment permettra le développement de nouveaux traitements contre le cancer. La synthèse d’ARNr par l’ARNPI est régulée à trois niveaux : l’initiation de la transcription, l’élongation et le nombre de gènes de l’ARNr en transcription. La plupart des travaux qui se sont intéressés à ces niveaux de régulation ont été réalisés avec des cellules en phase exponentielle de croissance. Au cours de mes travaux, je me suis attardé sur la régulation de la transcription par l’ARNPI au cours de la phase G1 du cycle cellulaire et au début de la phase S. Ainsi mes résultats ont montré que si la chromatine des gènes de l’ARNr est essentiellement dépourvue de nucléosomes, la régulation de l’ARNPI diffère dans des cellules en G1 et au début de la phase S. J’ai pu de ce fait observer qu’en G1, la transcription de l’ARNPI se concentre sur un nombre réduit de gènes en transcription. Dans des cellules arrêtées au début de la phase S avec de l’hydroxyurée, la transcription de l’ARNPI est perturbée par un défaut de maturation de l’ARNR. Fort de ces résultats sur la nature des gènes ribosomaux en phase G1, je me suis attardé à la réparation de ces gènes lors de cette phase. Alors que dans des cellules en phase exponentielle de croissance irradiées avec des UVC, la chromatine des gènes de l’ARNr se ferme ; je n’ai pas observé la formation de nucléosomes suite à l’irradiation de cellules synchronisée en G1. Mes résultats montrent également que la réparation est plus efficace. Parallèlement, j’ai exploré l’assemblage du complexe de réparation par excision de nucléotides. Toutefois, les résultats obtenus sont peu concluants.Abstract : The nucleolus is thought to be a “factory” involve in the production of ribosomes. This production is the most energetically consuming process in the cell. The three RNA polymerases are involved and this represents 80% of the total transcription activity of the cell. Three quarters of this transcriptional activity correspond to the synthesis of rRNA by the RNA polymerase I (RNAPI). So a better understanding of the cellular mechanisms taking place in this compartment may help for the development of new drugs against cancer. The synthesis of rRNA by RNAPI is regulated at three levels: initiation of transcription, elongation and the number of rRNA genes in transcription. Most of the works that characterized those levels of regulation were done in exponentially growing cells. During my work, I studied the regulation of RNAPI during the G1 phase of the cell cycle and during the early S phase. So my results have shown that if the chromatin of the rRNA genes mostly depleted of nucleosomes, the regulation of the RNAPI differs in cells in G1 and early S phase. I could observe that in G1, RNAPI transcription concentrates on a reduced number of transcribed rRNA genes. In cells arrested in early S phase with hydroxyurea, RNAPI transcription is disrupted by a defect in rRNA processing. With this results on the nature of the ribosomal genes in G1, I started the analysis of the DNA repair of those genes during this phase of the cell cycle. In UVC irradiated exponentially growing cells, the rRNA genes are closing. But in cells synchronized in G1, I could not observe the deposition of nucleosomes after UVC irradiation. Moreover, my results show an increase repair of the locus. In parallel, I have explored the assembly of the complex of nucleotide excision repair. However, the results were not conclusive.
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Bianco, Giulia. „Soluzione delle Equazioni in Forma Debole per l'Analisi Statica e Dinamica di Archi e Travi in Materiale Composito“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
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Lo scopo è quello di analizzare il comportamento statico e dinamico di travi rettilinee e curvilinee in materiale composito attraverso l’applicazione del Metodo Generalizzato di Quadratura Integrale.
L’elaborato si suddivide in quattro capitoli, nei quali viene fornita la teoria relativa alla statica e alla dinamica degli elementi strutturali analizzati e vengono presentati i risultati delle applicazioni della tecnica numerica adottata.
All’interno del primo capitolo sono esposti i fondamenti matematici su cui si basa il Metodo Generalizzato di Quadratura Differenziale (GDQ) e il Metodo Generalizzato di Quadratura Integrale (GIQ).
Nel secondo capitolo si introducono le principali caratteristiche geometriche di un arco, vengono introdotte le teorie strutturali di ordine superiore e vengono dedotte le equazioni fondamentali che racchiudono in unico sistema i tre aspetti del problema dell’equilibrio elastico di un arco in materiale composito, ovvero congruenza, legame costitutivo ed equilibrio statico dinamico.
L’elaborato prosegue con il terzo e quarto capitolo che costituiscono il nucleo principale della trattazione; infatti, dopo aver fornito le necessarie basi teoriche nei capitoli precedenti, sono presentati i risultati dell’analisi dinamica (vibrazioni libere) e dell’analisi statica delle principali strutture ad arco in materiale composito. La soluzione numerica GIQ viene confrontata non solo con i risultati disponibili in letteratura, ma anche con quelli forniti e ricavati attraverso l’utilizzo di un programma di calcolo strutturale (Straus7), basato sul metodo degli elementi finiti (FEM).
L’obiettivo principale di questo elaborato è quindi quello di proporre un approccio numerico per risolvere la formulazione debole delle equazioni fondamentali, ottenute tramite modelli strutturali di ordine superiore, in maniera efficiente, accurata e con un ridotto costo computazionale.
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Gavril, Iuliana-Elena. „'Archi-texts' for contemplation in sixth-century Byzantium : the case of the Church of Hagia Sophia in Constantinople“. Thesis, University of Sussex, 2012. http://sro.sussex.ac.uk/id/eprint/40497/.
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This thesis aims to contribute towards a better understanding of what the Byzantines experienced in church spaces. By thoroughly mapping users' encounters with the church of Hagia Sophia in Constantinople in the sixth-century, it examines whether the experience of the architectural space during the Eucharistic ritual augmented a religious experience, which in turn, influenced the way the Byzantines talked about their spiritual experience whilst being in a church, and thought of their churches as ‘heaven on earth.' It places textual evidence alongside architectural evidence. The basic approach of this thesis is rooted in phenomenology and multisensory perception of space. In the first chapter, I make a case for the necessity of studying the textual evidence in light of the spatial experience of the building. I suggest that the concept of ‘archi-text' is key to answering the question of what was a church in sixth-century Byzantium. Developed in three chapters, the textual analysis focuses on sixth-century ekphraseis of Hagia Sophia written by Procopius of Caesarea and Paul the Silentiary, and the inauguration kontakion composed for the church dedication. In the first two chapters, I examine how the spatial perception of the church influenced the way Hagia Sophia was described. In the next chapter, I explore how the Byzantines thought of the church in symbolic and theological terms. The literary analysis concludes that Hagia Sophia was perceived as a centralised space and represented as a ‘heaven on earth.' These two points are further scrutinized all through the spatial analysis of the church. The final chapter links the Byzantines' symbolic representation of the church to the architectural physicality of Hagia Sophia.
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Tanet, Lisa. „La bioluminescence bactérienne, des océans à Biolum-Archi : un phénomène biologique fascinant au service d'un modèle d'habitat durable méditerranéen?“ Electronic Thesis or Diss., Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0121.
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La bioluminescence, production de lumière visible par des organismes vivants, est un phénomène fascinant, en particulier chez les bactéries qui l’émettent de façon continue. Pour ce projet interdisciplinaire, ces travaux de thèse ont mêlé recherche fondamentale et appliquée, et se sont articulés autour de la problématique suivante : la bioluminescence bactérienne peut-elle être mise au service d’un modèle d’habitat durable ?Ce manuscrit se compose (i) d’un premier chapitre introductif sur le phénomène de bioluminescence, intégrant notamment une synthèse bibliographique sur l’importance écologique des bactéries bioluminescentes dans le milieu marin ; (ii) d’un second chapitre montrant que les gènes impliqués dans la bioluminescence ne sont pas toujours régulés par le quorum sensing ; (iii) d’un troisième chapitre se focalisant sur les effets de l’oxygène sur la physiologie de la souche modèle (iv) d’un quatrième chapitre regroupant les informations relatives à une application de la bioluminescence bactérienne et les prototypes développés au cours de cette thèse. Dans ce dernier chapitre, les avantages, ainsi que les limites actuelles, de l’utilisation de la bioluminescence comme source d’éclairage sont énoncés. Les résultats obtenus au cours de ces trois années ont mis en avant des premiers éléments de réponse et ont permis d’acquérir de nouvelles connaissances sur la souche utilisée, et sur les bactéries bioluminescentes d’une façon générale. Ces travaux visent à être poursuivis et approfondis par d’autres recherches, davantage encore axées vers un objectif pratique et appliqué de la bioluminescenceBioluminescence, the emission of light by living organisms, is a fascinating phenomenon, especially in bacteria that emit it continuously.For this interdisciplinary project, this thesis work mixed fundamental and applied research, and was structured around the following problem: can bacterial bioluminescence be used at the service of a sustainable-habitat model? This manuscript is composed of (i) a first introductory chapter on the bioluminescence phenomenon, including a bibliographical synthesis on the ecological importance of bioluminescent bacteria in the marine environment; (ii) a second chapter showing that the genes involved in bioluminescence are not, in P. photobacterium ANT-2200, under quorum sensing control; (iii) a third chapter focusing on the effects of oxygen on the physiology of the model strain through the use of an semi-automated culture platform allowing controlled and regulated conditionsb; (iv) a fourth chapter gathering information relating to an application of bacterial bioluminescence and the prototypes developed during this thesis. In this last chapter, the advantages, as well as the current limitations, of the use of bioluminescence as a source of illumination are stated. The results obtained during these three years have highlighted initial elements of response and have led to new knowledge on the used strain, and on bioluminescent bacteria in general. This work is intended to be continued and deepened by further research, even more focused on the practical and applied objective of bioluminescence
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Turpin, Christophe. „Développement, caractérisation des pertes et amélioration de la sûreté de fonctionnement d'un ondulateur multicellulaire à commutation douce (ARCP)“. Toulouse, INPT, 2001. http://www.theses.fr/2001INPT021H.
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Cette thèse traite de l'introduction de la commutation douce dans une topologie de convertisseurs statiques bien maîtrisée en commutation dure : le convertisseur multicellulaire série destiné aux domaines de la très forte puissance, haute tension (traction ferroviaire, navale,). L'objectif est de réduire les pertes dans le silicium. La technique retenue pour produire les conditions de commutation douce est l'ARCP (Auxiliary Resonant Commutated Pole). Après avoir exposé son fonctionnement et ses propriétés (notamment l'équilibrage naturel des tensions flottantes), l'auteur étudie et évalue en terme de pertes les stratégies classiques de commande pour le convertisseur multicellulaire à ARCP. Une autre partie porte sur l'étude de la sûreté de fonctionnement de cette structure. Elle est en effet sujette à de possibles défaillances dans les mécanismes de commutation (ratés) qui peuvent être catastrophiques pour son intégrité. Les stratégies classiques de commande, lourdes et complexes, peuvent, pour les plus performantes, limiter ces risques de défaillance. Lors de la recherche d'autres solutions améliorant la sûreté de fonctionnement, un dispositif de rattrapage des ratés a été imaginé et développé. Il peut être utilisé ponctuellement pour rattraper le fonctionnement ou bien forcer systématiquement et favorablement la commutation. Non seulement, il accroît la sécurité, mais simplifie aussi de manière radicale la commande de cette structure complexe. Le rendement d'un prototype de convertisseur tricellulaire a ARCP a été caractérisé expérimentalement. A cette occasion, une méthode de mesure directe et très précise des pertes dans les convertisseurs de très fortes puissances a été développée et formalisée : la méthode d'opposition. Générale, elle permet de plus de tester les convertisseurs de puissance élevées sans charge et source d'alimentation tolérant la puissance réellement mise en jeu.
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Lenander, Ann-Sofi. „A GIS-Based Method of Deriving Spatially Distributed Unit Hydrographs“. Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297671.
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Prior to using hydraulic and spatially distributed modelling softwares, the theory of the unit hydrograph was a commonly used tool for modelling of surface and runoff water. While distributed models often provide detailed results from extensive calculation durations, the unit hydrograph have been questioned for simplifying the physical characteristics of the watershed modelled. Typically, the unit hydrograph theory does not explicitly take the flow paths of the watershed in consideration during calculation. With the rise of geographical information systems, methods of deriving spatially distributed unit hydrographs have been developed. The aim of these have commonly been to find a spatially varied form of hydrological modelling, while still keeping the computation times low. The method is commonly built by calculating the travel time to the watershed outlet along the flow path. In this study, spatially distributed unit hydrographs are derived separately for the watershed’s pervious and impervious surfaces in a Python script using map algebra and the Esri’s Python wrapper module Arcpy. The travel times are generated from a velocity field calculated using Maidment and Olivera’s velocity equation. The velocity equation contains three unknown parameters; one for an average velocity and two calibration parameters. The excess precipitation is calculated of a 100 year return period Chicago Design Storm hyetograph using the SCS-CN method. The direct runoff hydrographs are calculated over three semi-urban watersheds in Smedby in southern Sweden, and the results are compared to MIKE 21 hydrograph data of each corresponding watershed and rain input. The result obtained showed to replicate the hydrograph response quite well, but only if the unknown parameters in the velocity equation were calibrated to match the MIKE 21 data. The unknown parameters of the velocity equations produces uncertainties of using the method without calibration data, which implies that the script is not well adapted to use for modelling predictions. It may be of interest to calculate the travel times of the locations within the watershed using a different formula. The script tool could be tested using different design storms as input, and areas of different characteristics compared to Smedby could be tested.Innan det blev vanligt att använda hydrauliska och rumsliga modellerings- mjukvaror användes ofta teorin bakom enhetshydrografen för modellering av avrinning. Medan de rumsliga mjukvarorna ofta erbjuder detaljerade resultat till priset av långa beräkningstider, har enhetshydrografen ifrågasatts för att förenkla den fysiska karaktären av avrinningsområdet. Typiskt sett tar inte enhetshydrografen avrinningsområdets flödesvägar direkt i hänseende vid beräkning. Utveckling och ökad tillgänglighet av geografiska informations- system förenklade möjligheterna att utveckla beräkning av enhetshydrografer som tar hänsyn till avrinningsområdets karaktär, typiskt sett genom att beräkna rinntiden från varje läge i avrinningsområdet, längs rinnvägarna och till utloppet. I den här studien beräknas spatiala enhetshydrografer separat för avrinningsområdets hårdgjorda och icke hårdgjorda ytor, genom att utveckla ett Python skript med hjälp av karalgebra och Esri’s wrapper modul ArcPy. Rinntiderna från olika lägen i avrinningsområdet beräknas med Maidments och Oliveras formel för hastighet, vilken innehåller okända parametrar för en uppskattad medelhastighet samt två kalibreringsparametrar. Effektivt regn från ett Chicago Design Storm regn med en återkomsttid på 100 år beräknas med hjälp av SCS-CN metoden. Hydrograferna för direkt avrinning faltas för tre semi-urbana avrinningsområden i Smedby i södra Sverige för att sedan jämföras mot MIKE 21 genererad hydrograf data för respektive motsvarade avrinningsområde. Hydrografdata producerat av MIKE 21 har tagits fram med lika CDS-regn data som input. Resultatet visar att hydrografer snarlika MIKE 21 hydrograferna kan tas fram med Maidments spatialt fördelade enhetshydrograf, om de okända parametrarna i Maidments formel kalibrerades mot MIKE 21 data. Utan kalibreringsdata för att bestämma de okända parametrarna kan resultatet anses vara mycket osäkert, vilket antyder att Python skriptet ej bör användas för använda metoden för att förutspå responser av regnevent. Andra beräkningar än Maidments ekvation kan vara av intresse att implementera. Olika typer av regninput samt spatial data över andra platser än Smedby kan vara av intresse att testa Python skriptet för.
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Hanson, Ronald J. „Implementing Closed-Loop Control Algorithms for DC-to-DC Converters and ARCP Inverters Using the Universal Controller [electronic resource]“. Ft. Belvoir Defense Technical Information Center, 1997. http://hdl.handle.net/10945/8509.
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The objective of this thesis is to investigate the use of the Universal Controller to control the DC-to-DC power converter and the Auxiliary Resonant Commutated Pole (ARCP) power inverter. These power electronic devices are central to the development of a DC Zonal Electric Distribution System (DC ZEDS) that is scheduled for application in the twenty-first century surface combatant (SC-21). The development of appropriate closed-loop controls is a key element to this design process. The Universal Controller is a digital controller that was developed by personnel at the Naval Surface Warfare Center (NSWC), Annapolis, Maryland. The basic operation and control of the DC-to-DC buck converter and the ARCP inverter are described, with emphasis placed on the advantages of DSP control. A complete investigation of the hardware that comprises the controller and how to program the controller to implement closed-loop control is undertaken. Previous studies have developed control algorithms that have been tested through simulation and analog hardware. In this research endeavor these control algorithms, particularly the one relevant to the DC-to-DC converter, are implemented using the Universal Controller to validate operations. Finally, a flow path for implementing the closed-loop control of the ARCP unit is discussed and recommendations for improvements in future designs are outlined
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Oliveira, Elgson Decarle de. „A responsabilidade socioeconômica e ambiental no processo de sustentabilidade e desenvolvimento local: estudo de caso das associações de catadores RESOL e AREPI“. Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/493.
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Durante as últimas cinco décadas um grande número de pessoas desempregadas tem encontrado na catação de materiais recicláveis uma forma de sobrevivência. Apesar do preconceito e da baixa valorização do trabalho dos Catadores por parte da sociedade, eles vem se organizando em Cooperativas e Associações visando melhores condições de vida e de trabalho. Em tais organizações eles vem se engajando em diversos projetos de reciclagem em parceria com administrações locais. O presente trabalho identifica e analisa duas associações de Catadores de materiais recicláveis, a Associação dos Recicladores de Pinhais – AREPI e a Associação dos Trabalhadores de Reciclagem de Resíduos de Colombo – RESOL, pertencentes a região metropolitana de Curitiba. O objetivo é analisar a gestão administrativa quanto ao desenvolvimento da sustentabilidade socioeconômica e ambiental desses empreendimentos. A pesquisa qualitativa foi utilizada como metodologia do presente estudo e engloba a realização de entrevistas semiestruturadas com as presidentes das associações, aplicação de questionários a todos os associados, observação durante dois anos e meio e diário de campo. O levantamento dos dados a partir dos questionários e entrevistas gerou informações que serviram de base para a análise da gestão administrativa dos empreendimentos. Foi possível constatar que as associações possuem condições semelhantes caracterizadas pela: inclusão social; geração de trabalho; conservação ambiental oriunda da reciclagem dos resíduos sólidos; legislação voltada à defesa dos direitos dos Catadores; Fórum Lixo e Cidadania e políticas públicas de apoio aos Catadores, que propiciaram o aumento da renda dos associados em 131%, a partir da vinda dos novos caminhões doados pela FBB e FUNASA. Além disso, a questão gênero é um fator preponderante, aonde 93% dos associados são mulheres. Este estudo permitiu concluir que existe a necessidade da adoção de um plano estratégico de negócios pelas associações, que garanta o desenvolvimento sustentável, mediante a concorrência no segmento da reciclagem. A partir do novo cenário estabelecido pela Política Nacional dos Resíduos Sólidos, o fortalecimento da infraestrutura e a comercialização dos materiais recicláveis em rede contribuirão para o processo do desenvolvimento da sustentabilidade dos empreendimentos de Catadores.During the past five decades a large number of unemployed people has found in the activity of collecting recyclable waste a way to survive. Despite the low appreciation of the “Catadores” work by society, they have been organizing themselves into cooperatives and associations to obtain better conditions of life and work. In such organizations they have been taking part of several recycling projects together with local administrations. This work identifies and analyzes two associations of “Catadores” of recyclable waste, the Associação dos Recicladores de Pinhais – AREPI and the Associação dos Trabalhadores de Reciclagem de Resíduos de Colombo – RESOL, located in the metropolitan region of Curitiba - PR. The objective is to analyze the administrative management related to the development of the socioeconomic and environmental sustainability of these enterprises. The qualitative research was adopted as the methodology of this study and included semi-structured interviews with the presidents of the associations, questionnaires to all members, two years and a half of observations and notes. The data obtained from the interviews and questionnaires produced information that enabled the analysis of their administrative managements. It was possible to conclude that the enterprises present some similar features characterized by: social inclusion; creation of jobs; environmental preservation due to solid waste recycling; defense of the “Catadores” rights by laws; Forum Lixo e Cidadania and public policies to support the “Catadores”, which has provided an increase in the income of the associated “Catadores” of 131%, since the arrival of new trucks donated by FBB and FUNASA. Moreover, the gender issue is a major factor where 93% of the members are women. This study concluded that the associations need to adopt a business strategic planning to ensure sustainable development in face of the competitive recycling sector. In front of the new scenario established by the National Solid Waste Policy, the strengthening of the infrastructure and the recycling network will contribute to the process of developing the sustainability of the “Catadores” associations.
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Floodeen, David L. „Using the PEBB universal Controller to modify control algorithms for DC-to-DC converters and implement closed-loop control of ARCP inverters“. Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA355736.
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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, September 1998."September 1998." Thesis advisor(s): John G. Ciezki, Robert W. Ashton. Includes bibliographical references (p. 113-114). Also available online.
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Ottenby, Nore. „Focal Operations with Network Distance Based Neighbourhoods : Implementation, Application and Visualization“. Thesis, KTH, Geoinformatik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170018.
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In spatial analysis, many operations are performed considering the neighbouring locations of a feature. The standard definition of a neighbourhood is an area confined by geometrical length and direction with respect to its focus. When allocating a location for a service, the population distribution is often considered. Standard GIS software includes tools for computations with uniform neighbourhoods, usually equal sized circles. These tools can be used for distribution analysis. Many geographic studies used as basis for city planning decisions use distance as an evaluator. It is a frequent occurrence that the actual distance is approximated using factored straight-line distance. For great distances and large datasets, this is a sufficient means of evaluation, whilst for smaller distances for specific locations, it poses major drawbacks. For distribution analysis in a network space, the neighbourhood would need to be derived from the local set of network features, creating a unique neighbourhood for each location. The neighbourhood can then be used to overlay other datasets to perform analysis of features within the network space. This report describes the application of network distance based neighbourhoods to design a tool, Network Location Analysis, for calculating focal statistics for use as a city planning decision support. The tool has been implemented as a workflow of ArcGIS tools scripted as a Python toolbox. The input required by the tool is a population point layer and a vector network dataset. The output is a grid of points with population statistics as attributes and corresponding neighbourhoods generalized as polygons. The tool has been tested by comparing it to standard focal operations implemented in ArcGIS and by applying it to the dataset used when conducting a study on the location of a new metro station using conventional ArcGIS tools. The results have been analysed and visualized and compared to data used in the study. The result concludes that Network Location Analysis surpasses conventional ArcGIS tools when conducting analysis on features in a network. It derives an accurate set of sum and proximity statistics for all locations within the processing extent, enabling analysis on the population distribution throughout the area and for specific points. The output is intuitive, manageable and can be visualized as raster or by displaying the neighbourhoods as polygons and can be used to evaluate population distribution and network connectivity. The drawbacks of the tool are its lack of robustness, its rigidity to input and the inefficient implementation causing execution time to be unpractical.
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ARNAUD, Julie Marie Margot. „Etude des restes mandibulaires d’Homo neanderthalensis de Guattari, Caverna delle Fate et San Francesco d’Archi“. Doctoral thesis, Università degli studi di Ferrara, 2013. http://hdl.handle.net/11392/2388836.
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The current data on the peopling of the Italian peninsula suggest a delay in the acquisition of Neanderthals’ autapomorphies, due to geographic isolation. In Europe, the first Neanderthals’ derived features appeared around 450 ka BP whereas in Italy the specimens show an archaic morphology by the presence of plesiomorphic features and the first autapomorphies will be individualized from the MIS 9 (350 ka ca.).
We propose in this work a revision of Italian mandibular fossil remains attributed to Homo neanderthalensis: Guattari II, Guattari III, Fate II, Fate III and Archi I, in order to replace them in the European evolutionary context through a morphological and a morphometrical study. The presence of immature specimens (Fate II and Archi I) involved the study of Neanderthals’ developmental pattern which divided the scientific community: some authors define Neanderthal ontogenesis as similar to the one of modern humans and others highlight divergent evolutionary trajectories based on maturation precocity in Neanderthal groups.
The reference sample is composed of 72 adult specimens consisting of 24 Homo neanderthalensis, 41 modern humans and 6 fossils from the Middle Pleistocene. Immature specimens are represented by 16 Homo neanderthalensis and 44 modern humans and classified into five growth stages, from an incomplete deciduous dentition (stage 1) to the beginning of the eruption of the third molar (stage 5).
The morphological study is based on the evaluation of 40 relevant features for evidencing evolution pattern. We complete this analysis with linear morphometric through the comparison of 20 measurements and geometric morphometric based on the comparison of symphyseal outlines with Elliptic Fourier Analysis, which we have adapted to this specific study.
The results obtained allowed to confirm that first of all the accretion model of Neanderthals’ evolution is identifiable in Italy. In fact, Archi and Fate II mandibles show a discrepancy. Fate II is chronologically more ancient but older, and doesn’t have as derived features as those observed in Archi. Second of all, at the European level, we observe a discrepancy in the expression of features, for example in Guattari mandibles we can see a persistence of plesiomorphic traits as observed in the cranium Guattari I. Furthermore, these specimens show a high inter-individual variability which is discussed in this present work. A morphological pattern has also been identified in the Caverna delle Fate and in the Hortus human remains characterized by a gracility of the mandibular corpus.
Finally, the study of growth and development pattern allowed to highlight differences between Neanderthals and modern human infants from the same dental age not only on the general size of the mandible but also on the shape of the symphysis profile.
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Houé, Vincent. „Characterization of non-retroviral integrated RNA virus sequences (NIRVS) in Aedes albopictus populations and Relation with vector competence“. Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS139.
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Aedes albopictus est un vecteur de transmission d’arbovirus, et ceci fait de lui une sérieuse menace. Durant la dernière décennie, NIRVS (séquences intégrées de virus à ARN non-rétroviraux) issues de Flavivirus spécifiques d’insectes (FSIs) ont été découvert intégrées dans le génome du moustique Aedes albopictus il y a très longtemps. De plus, il a été montré que ces éléments pourraient avoir un rôle antiviral chez le vecteur par la production de piARNs qui réduirait la réplication virale. Ici nous avons caractérisé 8 NIRVS chez 12 populations naturelles d’Aedes albopictus. Nous montrons qu’il y a une forte diversité inter- et intrapopulation, suggérant une évolution complexe de ces NIRVS dans le génome. De plus, les analyses microsatellites basées sur les mêmes populations ont révélé que ces NIRVS ont évolué différemment de gènes neutres, suggérant une potentielle fonction de ces éléments. Nous montrons que cette fonction pourrait être liée à la compétence vectorielle d’Aedes albopictus pour les arbovirus, mais que celle-ci reste pourtant incertaine et nécessite de plus amples investigations. Enfin, nous montrons par l’utilisation des lignées cellulaires infectées de manière persistante que la formation de NIRVS est un évènement qui se produit rarement dans le génome des moustiques Aedes, et que les arbovirus, avec les FSIs, sont également capables d’endogénisation chez les moustiquesAedes albopictus is a vector for transmitting arboviruses and this makes it a serious threat. In the last decade, NIRVS (non-retroviral integrated RNA virus sequences) from insect-specific flaviviruses (ISFs) have been found integrated in Aedes albopictus mosquito genome a long time ago. Moreover, it has been shown that these elements may have an antiviral role in vectors by producing piRNAs that would reduce viral replication. Here we characterized 7 NIRVS in 12 Aedes albopictus wild populations. We show that there is a high diversity inter- and intra-population, suggesting a complex evolution of these NIRVS in Aedes albopictus genome. Moreover, microsatellite analysis based on those same populations revealed that those NIRVS evolved differently from neutral genes, suggesting a potential function of these elements. We show that this function may be linked to the vector competence of Aedes albopictus to arboviruses, but remains unclear and require more investigations. Finally, we show by establishing persistent infected cells that NIRVS formation is an event that occurs rarely in the Aedes mosquito genome, and that arboviruses, along with ISFs, are also capable of endogenization in mosquitoes
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Falcioni, Valentina. „Proprietà topologiche e controesempi“. Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11438/.
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In questa tesi ho approfondito il significato di alcune proprietà topologiche, considerando degli esempi che mi hanno permesso di capire qual è il loro limite.
Innanzitutto ho scritto un breve excursus sulla storia della topologia, poi ho riportato definizioni e proposizioni di base per poter studiare l'argomento, e infine mi sono soffermata sugli esempi: seno del topologo, cerchio di Varsavia e spazio a pettine.
L'esempio del seno del topologo permette di distinguere la differenza fra connessione e connessione per archi; il cerchio di Varsavia mostra che le proprietà di connessione e connessione per archi globali non implicano le rispettive proprietà locali; infine grazie allo spazio a pettine si può mostrare la differenza fra retratto per deformazione e retratto forte per deformazione.
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Lonzi, Giuditta. „La cupola del Duomo di Siena: ricerca storica, analisi costruttiva e modellazione strutturale tramite FEA finalizzate alla comprensione del comportamento statico“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16541/.
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Il centro storico di Siena, iscritto nella Lista Patrimonio Mondiale dell’UNESCO, è soggetto ad una forte contaminazione ambientale da cui deve essere necessariamente protetto e conservato in funzione del valore storico ed estetico che rappresenta. La vetustà del patrimonio architettonico comporta la necessità di uno studio approfondito del singolo edificio e la comprensione delle particolari tecniche costruttive antiche al fine di una corretta interpretazione del comportamento strutturale per l’elaborazione di efficaci strategie di prevenzione.
Questa tesi di laurea vuole approcciarsi nel suddetto modo per lo studio della cupola del Duomo di Siena, concentrandosi sulla calotta esterna in muratura, di più recente costruzione, ad opera dell’architetto Partini e risalente al 1892. Per cercare di individuare e interpretare un corretto comportamento della struttura si è proceduto iniziando dalla ricerca storica archivistica per poi passare all’analisi costruttiva dettagliata della calotta. Si è ritenuto maggiormente esaustivo affiancare all’analisi puramente logica del manufatto, una modellazione tridimensionale agli Elementi Finiti (FEM) tramite software, che hanno consentito di effettuare una esauriente analisi del comportamento statico dalla cupola e dell’interazione esistente fra le due calotte, interna ed esterna.
È indispensabile comprendere le vecchie tecniche costruttive, il modo di ragionare e agire sempre secondo criteri studiati, logici e motivati così è possibile dedurne un corretto comportamento e di conseguenza intervenire laddove siano state individuate le criticità con interventi di recupero e consolidamento.
La questione di fondamentale importanza a cui si vuole dare rilievo, consiste nello studiare e analizzare in maniera assolutamente obiettiva il passato senza lasciarsi vincolare dalle influenze del periodo moderno. È questa concezione moderna che spesso ci spinge ad assumere come certezze casi che in realtà nascondo significati ben più profondi.
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Ertuğrul, Tacettin. „Jacques Derrida et le problème de la technique“. Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAC023.
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La tâche de notre travail est de penser la question de la technique dans sa relation profonde et complexe avec celle de l’écriture chez Derrida. Les quasi-concepts du pharmakon et du supplément nous permettent de dire que la technique est pharmaco-supplémentaire. Mais il faut avancer et dire que l’archi-technicité est déjà la techno-graphie pharmaco-supplémentaire. L’œuvre de Derrida nous permet aussi de penser les télétechnologies à partir de l’écriture qui est déjà télé-technique. Les télétechnologies vont bien au delà d’une certaine conception courante de « média » ou de « télécommunication», car le concept de télé-technique atteint le coeur du mouvement de la différance. Il faut penser la télé-technique avec l’extériorisation, l’ex-appropriation, la trace, l’archive etc. Et dans le coeur de la différance, l’itération comme répétition en différence nous pousse à penser d’une nouvelle manière le même ou l’autos. Le même n’est pas stable, toujours en distance à soi-même et ouvert à l’autre. Il faudrait chercher l’archi-technicité dans cette ouverture à l’autre qui est liée à l’itérabilité différancielle. Une technicité comme ouverture à l’incalculableThe task of our work is to think the question of technique in its profound and complex relation with the question of writing in Derrida’s work. The quasi-conceptsof pharmakon and of supplement allow us to say that the technique is pharmaco-supplementary. But we must move forward and say that thearchi-technicity is pharmaco-supplementary techno-graphy. Derrida’s workalso allows us to think the teletechnologies from writing that is already teletechnical.The teletechnologies go well beyond a certain current conception of« media » or « tele-communication », because the concept of teletechnology reach the heart of the movement of différance. We try to think the teletechnique with exteriorisation, ex-appropriation, trace, archive, etc. And in the heart of différance, the iteration as repetition in difference leads us to think newly the same (le même). The same is not stable, is in distance with it self and open to the other. We should search the archi-technicity in this opening to the other that is related to differential iterability. It has to be noted that the archi-technicity is a technicity which remains open to the incalculable, to the event (l’événement)
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Karandreas, Katerini. „Rehabilitating broken youth: Archi-therapy“. Thesis, 2013. http://hdl.handle.net/10539/13098.
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This thesis aims to explore the powerful synergy between the architectural
constructs of a rehabilitative children’s home in collaboration with both clinical and
non-clinical therapeutic approaches – particularly with regard to treating sexually
abused children in their school-going years. Sadly, with the rising number of sexual
child abuse cases in South Africa, there is a very dire need for such a facility as the
care provided in a standard children’s home is not enough.
The use of space to ensure a reciprocal and beneficial relationship between
architecture and healing is ultimately what this thesis wishes to achieve and it will
thus focus on how the treatment affects the building and how the building affects
the treatment.
Archi-therapy expands on the consideration of recent discoveries in the treatment of
trauma in sexually abused children. Initial treatments were heavily based on a
clinical aspect, not really considering the people and the place in which this
healing occurs. Only in recent years has the importance of environment, activity
and social interaction been considered. In addition to the clinical aspects of the
healing process, certain hobbies and pastime interests also play a significant role
as they can form part of an on-going, multi-faceted therapeutic process to assist
with the overcoming of the trauma. In turn, this creates a positive developmental
and rehabilitation platform for these broken youth, in a manner that goes beyond
the limited realm of clinical therapy.
Through interviews, literature and site visits, I hope to bring to light that
architecture can be interactive, and more than a mere container of a variety of
therapeutic activities. Architecture and the nature of the context can be part of the
healing process and assist with the sustainability of the specialised children’s home
that is proposed.
Archi-therapy considers the nature of the architecture, activities, people and
therapies (clinical and non-clinical) alongside their significant roles in the healing process of these precious children.
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LIVANI, MICHELE. „Ricostruzione dell’assetto geologico‐strutturale e dell’evoluzione tettonica del sistema di salienti e recessi al fronte dell'Appennino settentrionale (archi Emiliano e Ferrarese)“. Doctoral thesis, 2015. http://hdl.handle.net/11573/917776.
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Flatt-Hickey, Jamie. „Shifting archi(text)ure: Notes on a discourse“. Thesis, 2005. http://hdl.handle.net/1911/17776.
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The final issue of Assemblage marks a new form of discourse in architecture: compilations of short responses to general provocations about architecture from numerous writers active in the field.
Why are polls of this nature being taken now? The provocations imply a fundamental uncertainty, a gnawing existential angst.
This trend relates to a current fascination in the broader architectural discourse with self-organizing systems.
Yet self-organizing discourse fails to resolve the fundamental issues concerning architecture. In fact, soliciting input and disseminating it in this fashion, with no attempt at synthesis, provides a false sense of accomplishment. This shifts focus away from the question generating crisis and may contribute to dissolution of the discipline of architecture as we know it through appropriation by an emerging body of thought on the broader role of creativity and aesthetics in culture.
The question then becomes, who cares? Architectural autonomy and critical practice are at stake.
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ORTIZ, CANALES NELLY DANIELA, und 歐娜莉. „Archi-Culture as a Tool for Social Transformation“. Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ph365w.
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碩士國立臺北藝術大學
文創產業國際藝術碩士學位學程(IMCCI)
105
“Architects are not building temporary housing because we are too busy building for the privileged people.” - Shigeru Ban In the wake of the 21st century, the world is a source of anxiety where past certainties are no longer a focal point of reference. Global economies are no longer a focal point of reference. Global economies have ceased to be an optimistic realm of growth and development. The expansion of technology and its resulting virtual revolution have only been experienced by a fraction of the world’s population while the rest live in less than suitable conditions. Cataclysmic events appear unavoidable in the near future if currents patterns continue. Honduras is not impervious to this chaotic and sometimes traumatic collapse of previous certainties and references of hope. Through the concept of Cultural Quarters the project of “Genesis Development” propose an urban-architectonic intervention using art and culture as tools for social transformation analyzing case studies such as the Treasure Hill of Taipei City, Taiwan, the Pier 2 Arts Center of Kaohsiung, Taiwan, the Miami’s Wynwood Design District and especially the Medellin, Colombia Library-Park Spain, these projects provide examples of urban renewal in eastern and western countries, demonstrating how through art and culture they have recovered forgotten spaces. Through the study of the above case studies, interviews and field studies, the ultimate goal is to propose a Cultural quarter in one of the most dangerous neighborhoods of Tegucigalpa, which is considered one of the most violent cities in the world in order to rescue especially the children from the drug traffickers and gang members who unfortunately have been the ones who provide a solution to their problems. As well to understand in a deeper way the research process and processes through the field exposure and daily-life experiences of the area in order to create a project that not only meets the current needs of users but as well to prevent future problems and possible gentrifications.
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Caracciolo, Luca, Salvatore Critelli, Piero Manetti, Fabrizio Innocenti und Franco Russo. „The interplay of accretionary processes and nagnatic arcs in forming stratigraphic sequences in the Circum-Rhodope belt, Greece and Bulgaria“. Thesis, 2013. http://hdl.handle.net/10955/354.
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MONTANINI, Alessandra. „Il complesso vulcanico di Monte Arci (Sardegna): aspetti petrologici e geochimici“. Doctoral thesis, 1992. http://hdl.handle.net/11381/2384493.
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Liao, Po-chou, und 廖柏州. „The Archi/texture of James Joyce’s Ulysses: Archive Fever, Politics, and Spectrality in “Cyclops”“. Thesis, 2017. http://ndltd.ncl.edu.tw/handle/7j36ae.
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碩士國立臺灣大學
外國語文學研究所
105
James Joyce writes Ulysses with the ambition to seek to establish the whole picture of Dublin in Ireland, with various styles and transition of perspectives in each of its chapter in Ulysses. Joyce’s Ulysses tries to embrace everything in the world like the process and operation of an encyclopedia. However, when reading, or commenting on Joyce’s Ulysses, few ever perceive (consciously or unconsciously) the undercurrent circulating behind Ulysses’s ambition of duplicating the whole vivid picture of Dublin: the preserving desire. The wish to write down everything into one novel, or to inscribe everything absolutely, means a desire to preserve it totally without remains. Consequently, it is Joyce’s uncanny or nearly lunatic desire to memorize, record, or archive everything in the encyclopedia called Ulysses that we want to consider and theorize─it is in the perspective of Jacques Derrida’s archive fever that will help to further the reading of Ulysses. The thesis is an attempt to re-archive, re-trace, and re-translate Joyce’s Ulysses. In the first part, I try to theorize Joyce’s use of the lists of names in “Cyclops” in the perspective of Derrida’s archive fever and at the same time historicize with Michael Groden’s observation and documentation of the publication of “Cyclops.” Secondly, I manage to bring up the political dimension of archive fever; that is, the names which are included in “Cyclops” are under the process of selection, or of filtration. Last, I strive to connect the aspect of names with the issue of identity.
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BUTTARAZZI, MARIA ANTONIETTA. „Hystorical Rules and Theories on Masonry Arches from the Renaissance to Monasterio and Persy“. Doctoral thesis, 2013. http://hdl.handle.net/11573/916758.
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Cammino storico evolutivo sulle teorie degli archi in muratura a partire dal Rinascimento fino ai primi anni del 1800.
La costruzione di questo cammino è iniziata con la rivisitazione, mediante lettura esegetica e critica, delle regole costruttive utilizzate nel Rinascimento, delle teorie pre-elastiche di La Hire, Coulomb e Mascheroni del XVIII° secolo ed infine della teoria sugli archi non simmetrici descritta da Monasterio nel suo trattato inedito, Nueva Teorica sobre el empuje de bovedas, dell’inizio del XIX° secolo e della teoria per l’individuazione dei meccanismi di collasso degli archi simmetrici di Nicolas Persy descritta nella sua raccolta di lezioni, Cours sur la stabilité des constructions, à l’usage des élèves de l’ école royale de l’Artillerie et du Génie, Stabilité des voûtes del 1825.
Nell’analisi di queste teorie, per le strutture ad arco o voltate, in blocchi lapidei o muratura, è stato adottato il modello di corpo rigido soggetto a vincoli unilaterali ed attrito, per tenere in debito conto la scarsa resistenza a trazione del materiale e la elevata resistenza a compressione.
Il modello meccanico dell’arco murario come struttura mono-dimensionale governata ai giunti da opportune leggi di contatto normale e tangenziale.
La cinematica, la statica e la cinetica del sistema possono così essere definite, permettendo di individuare in condizioni di equilibrio stabile i range delle reazioni staticamente ammissibili come funzione della spinta in chiave.
La filosofia che soggiace ad un tale approccio per l’analisi delle strutture voltate lapidee o murarie consente di riabilitare la validità delle teorie pre-elastiche sulle strutture voltate lapidee o murarie.
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李鴻佑. „Hermeneutic Probe of Aristotle’s《Phusike akroasis》Kinesi-Archi-ology and Its Application in Science Education“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/03800350913400170037.
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博士國立高雄師範大學
物理學系
102
Aristotle said: "All come from One and return to One." The "One" in the sentence means (Gk.) Arche. In Kinesi-Archi-ology, it means (Gk.) Energeia specifically. It is the first time that this research organizes the origins and the meaning of the headwords ,like the ancient Greek vocabulary (Gk.) Energeia and (Gk.) Methodos. Furthermore, the research is based on not only Martin Heidegger's theory-the Phenomenon Hermeneutics, especially the three processes "Ge-fragtes", "Be-fragtes", and "Er-fragtes", but also the circle construction of Hermeneutics. A new though and investigate method for the definition, assessment framework and education of civic literacy have been presented in science education. This new approach is based on Heidegger’s philosophy of (Ger.) Dasein, which suggests that every person (Da-sein) has a nature to connect and communicate with his surroundings actively, and through these connections and communications, the person and his surroundings possess each other (i.e. around-about-him). Proceed forwards in this way, World and man will have each other eventually (i.e. world-hood). To explain precisely, when human beings are among the Gk. Energeia which is formed by ourselves, all staffs and all things. Therefore the beginning and the goal of civic education should be started and aimed at this creative nature of civics, and with the help of hermeneutic circles to intensify this nature. The etymological investigation of (Gk.) alphabet and (Gk.) Methodos show some important features of literacy and method, e.g. (1) literacy is the (Gk.) Arche of all the disciplines. This might suggest that the education of all disciplines shall be integrated for civic literacy. (2) method is the way of integration and creation.
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Hsieh, Tian-En, und 謝天恩. „Design and Implementation of Parallel Motion Estimation Archi-tecture Based on Fast Pel-Subsampling Algorithm“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/06799610767565342459.
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碩士中興大學
電機工程學系所
95
In this paper, a parallel motion estimation architecture based on fast pel-subsampling algorithm is proposed. We proposed a fast pel-subsampling algorithm to reduce the computational amount of the sum absolute difference (SAD). Moreover, the four-parallel spiral scanning (4PSP) with partial distortion elimination (PDE) mecha-nism is also utilized to early terminate the unnecessary SAD. Therefore, the proposed fast algorithm can avoid trapping into the local minimum and save the computational power with a little performance degradation. In the light of our algorithm, the 4x4 processing element (PE) array and the dual mode SAD tree are proposed to perform SAD and SAD of the pel-subsampling (SSAD) efficiently. For the sake of reducing the system memory bandwidth, the memory interleaving organization and local memory con-figuration are proposed to easily arrange the current data and reference pixels, and to achieve the Level C data-reuse scheme. The proposed architecture has been imple-mented using standard cell methodology for TSMC 0.18 um 1P6M technology. The chip implementation results show that proposed architecture can work at 100 MHz and its power consumption is about 71.6 mW. The chip size is 1.9x1.9 mm2. According to the experimental results, the proposed architecture can process1024x768 XGA resolu-tion pictures in 25 frames per second at 100 MHz. For the CIF specification, it can per-form 352x288@30fps in real time at 25 MHz working frequency. Therefore, the pro-posed architecture can be utilized in many mobile video applications.
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Peng, Chih-Wei, und 彭智偉. „The Study of Building an ARCI enabled project management based information sharing system“. Thesis, 2013. http://ndltd.ncl.edu.tw/handle/89396644363730359917.
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碩士中國文化大學
資訊傳播學系
101
Communication between human beings has been dramatically changed due to the development of information technologies and telecommunication technologies. Unfortunately, the evolving of the highly dynamical working environment, people, who works in a so-called mobile office,must receive massive and varied data, messages or information.Information overload seems unavoidable. More Internet usages, more information to consume. Unlike traditionally speaking,knowledge/information is power. Nowadays, receiving data may not only be a benefit, but also a heavily cost to our daily life and work. In this paper, a new approach based on work breakdown structure and information authority matrix is proposed and a web-based prototype is built to evaluate its performance. In the proposed mechanism, it is believed that message passing within the environment is rapidly reduced without compromising the communication chain.
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STIPO, GIANFRANCO. „Analisi del comportamento meccanico dei materiali compositi a matrice cementizia nel rinforzo delle strutture murarie“. Doctoral thesis, 2014. http://hdl.handle.net/2158/867033.
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Negli ultimi dieci anni al fianco dei più diffusi e conosciuti FRP (fiber reinforced polymer), sta acquisendo un sempre maggiore interesse l’impiego dei materiali compositi fibro-rinforzati a matrice cementizia, (FRCM, fiber reinforced cementitious matrix), per il rinforzo strutturale. Nonostante il crescente numero di studi riguardante la sua applicazione su supporti murari e non, le indagini sperimentali sono ancora limitate e, a differenza dei compositi a matrice polimerica, non esistono raccomandazioni o linee guida per la loro applicazione; pertanto sono necessarie ulteriori sperimentazioni atte a descriverne il comportamento.
A fronte di quanto detto, il presente lavoro ha come fine quello di aggiungere un ulteriore tassello nella comprensione del comportamento meccanico e dell’efficacia dei rinforzi strutturali a matrice cementizia applicati su supporti in muratura attraverso un’ampia sperimentazione effettuata in laboratorio.
In particolare, gli obiettivi della ricerca hanno riguardato: la comprensione dei principali fenomeni resistivi che caratterizzano il sistema FRCM, l’interpretazione del comportamento d’interfaccia fibra/matrice, la valutazione dell’efficacia sia in termini di capacità deformativa che di resistenza su elementi strutturali, quali pannelli e archi, ed infine la calibrazione di modelli analitici per la determinazione della forza trasmissibile.
Il presente lavoro si compone di una parte introduttiva in cui sono state affrontate le peculiarità degli edifici in muratura, evidenziandone le cause di vulnerabilità, e di come l’uso dei materiali compositi a matrice cementizia possa essere una soluzione ottimale come sistema di rinforzo.
La parte più consistente del lavoro ha riguardato un’estesa indagine sperimentale in cui, oltre alle prove di caratterizzazione dei materiali utilizzati, sono state eseguite prove di adesione su supporto di laterizio e prove su modelli in scala di pannelli e di archi rinforzati.
I risultati ottenuti sperimentalmente sono stati poi utilizzati per calibrare modellazioni analitiche che interpretano sia fenomeni di aderenza che il comportamento globale dei modelli rinforzati.
In the last ten years, alongside the most common and popular FRP (Fiber Reinforced Polymer), is acquiring an ever greater interest the use of fiber-reinforced composite materials in the cement matrix (FRCM, Fiber Reinforced Cementitious matrix), for structural reinforcement. Despite the growing number of studies regarding its application on masonry and on concrete, experimental investigations are still limited and, unlike of FRP, there are no recommendations or guidelines for their application; therefore they are needed further experiments to describe the mechanical behavior.
The present work has as its goal to add an additional step in the understanding of the mechanical behavior and the effectiveness of structural reinforcements in the cement matrix, applied to masonry substrates through extensive experimental testing.
In particular, the aims of the research were: understanding of the main resistive phenomena that characterize system FRCM, the interpretation of the behavior of the interface fiber/matrix, the evaluation of the effectiveness in terms of both deformation and resistive capacity of structural elements, such as panels and arches, and finally the calibration of analytical models for the determination of the transmittable force.
The present work consists of an introductory part on the peculiarities of masonry buildings, where the causes of vulnerability and the system of reinforcement based on the composite materials in the cement matrix were dealt.
The bulk of the work has involved extensive experimental investigation in which, in addition to the characterization tests of the used materials, adhesion tests were performed on a brick support and tests on scale models of reinforced panels and arches.
The results obtained experimentally were then used to calibrate the analytical modeling that interpret both phenomena of adhesion and the global behavior of the reinforced models.
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Millar, Zane. „Archi-virtualization: creating a progression through recreational escapism by means of gaming, animation and virtual creation within architecture“. Thesis, 2020. https://hdl.handle.net/10539/31365.
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A design project submitted in partial fulfilment for the degree of Master of Architecture (Professional) at the University of the Witwatersrand, Faculty of Engineering and the Built Environment, 2020We often are overwhelmed by the hustle and bustle of reality and look for a way to separate ourselves from the “real” world. One of the common means to retreat from the everyday rhythms of the world is through those of space and place, illustrations, photography, music and digital technology; one aspect of this is through that of gaming. The definition of “to escape” is to break free from the confined and expectation of the controlled world. We result to a means to escape when we are pressured by the everyday world. Looking at the influences of digital technology as a means to “escape”. Drawing attention to escapism and its brief causes and influences drawing attention to the 21st and future ideals, giving a means of escape which is through that of technology. We escape through many means but we always find a way physically or digitally to escape the everyday world. Digitally allows for one to enter a virtual world of fantasy and make believe. This is seen as a means of play and fun, which is opposite to that of the congested everyday life in one way. Escapism is a means to detach from a sense of place and relax. There are many different means to escape the reality of today but for the focus of the study it will draw up to how escapism allows a user to find relief through gaming, animation and the creation of escape within virtual reality. This paper will discuss the nature of escapism through the digital realm and how it can be utilized for recreational design within architecture, based on gaming and virtual reality
CK2021
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吳仁蘋. „Using ARCI to Strengthen the Connectivity Between Strategic Planning and Management by Objectives - A Case Study Based on Company P“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/h2xub7.
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碩士逢甲大學
經營管理碩士在職專班
102
As globalization swept over the whole world, how companies timely grasp the situation to develop blue ocean strategy to highlight its unique competitive advantage , and create a trend-setting products , is an important issue of Taiwan&;#39;s SMEs; therefore, it is urgent for Taiwan&;#39;s SMEs to apply related management tools to strengthen their management capabilities to enhance the competitiveness of enterprises . From above, strategic planning and management by objectives are most widely accepted management tools and to be executed. Today many companies in Taiwan use 10 to 11 months to implement an annual strategic planning through SWOT and PEST method , to form the annual strategic plan , and expanded to the objectives and KPI , hoping to overcome the difficulties in the competitive environment, and achieve their goals. However, after many years, some Taiwan enterprises implement strategic planning and management by objectives, are still unable to produce business objectives effectively. This study used a case study, through literature review and interviews with experts in order to understand the relationship between strategic planning and management objectives. The other historical documents related to the company interviews and case file records are also verified. Finally through findings and academics, we want to use ARCI matrix to link the critical success factors and strategic planning, as well as the implications for management. Successfully ARCI strengthen strategic planning and management by objectives connectivity and find critical success factors as follows : top management support , heads of departments to actively promote the implementation and supervision of the sector in accordance with the SOP process, full implementation of participation, are key factors in promoting the success of the company .
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Rodrigues, Ângela Afonso. „Spatio-temporal modelling of tornados with R-INLA, at the county-level in Texas and Ocklahona“. Master's thesis, 2017. http://hdl.handle.net/10362/34215.
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Dissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial TechnologiesThe United States of America is the county in the world that is more prone to tornado occurrence. This fact led many researchers, for the past years, to study and formulate theories about tornado occurrence, and which factors promote tornadogenesis. The theories around tornados are always coupled with an attempt to predict their occurrence, for better disaster alertness, and response, in case they happen. At the country level, the tornado occurrence is highly studied and understood. But the same does not happen for the state level, or county level. In this thesis, it is proposed a statistical model to characterize the occurrence of tornados in a state, given physical (terrain roughness and land-cover types)and demographic properties of its counties. This model also takes into consideration the spatial and temporal dimensions, as well as a space time interaction component. This model was applied for Oklahoma and Texas. The model with the covariates fits Texas‟ tornado occurrence, but for Oklahoma, only the spatio-temporal formulation can be applied. For Texas, the model explains the covariates as being congruent with the low-level inflow hypothesis, with tornados decreasing in zones where natural barriers for the flow can be constituted. Under the Bayesian framework, maps of spatial risk and probability of tornado occurrence for Texas and Oklahoma were computed, that can be used to make predictions in the future.
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Ertugrul, Tacettin. „Jacques Derrida et le problème de la technique“. Thesis, 2016. http://www.theses.fr/2016STRAC023/document.
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La tâche de notre travail est de penser la question de la technique dans sa relation profonde et complexe avec celle de l’écriture chez Derrida. Les quasi-concepts du pharmakon et du supplément nous permettent de dire que la technique est pharmaco-supplémentaire. Mais il faut avancer et dire que l’archi-technicité est déjà la techno-graphie pharmaco-supplémentaire. L’œuvre de Derrida nous permet aussi de penser les télétechnologies à partir de l’écriture qui est déjà télé-technique. Les télétechnologies vont bien au delà d’une certaine conception courante de « média » ou de « télécommunication», car le concept de télé-technique atteint le coeur du mouvement de la différance. Il faut penser la télé-technique avec l’extériorisation, l’ex-appropriation, la trace, l’archive etc. Et dans le coeur de la différance, l’itération comme répétition en différence nous pousse à penser d’une nouvelle manière le même ou l’autos. Le même n’est pas stable, toujours en distance à soi-même et ouvert à l’autre. Il faudrait chercher l’archi-technicité dans cette ouverture à l’autre qui est liée à l’itérabilité différancielle. Une technicité comme ouverture à l’incalculableThe task of our work is to think the question of technique in its profound and complex relation with the question of writing in Derrida’s work. The quasi-conceptsof pharmakon and of supplement allow us to say that the technique is pharmaco-supplementary. But we must move forward and say that thearchi-technicity is pharmaco-supplementary techno-graphy. Derrida’s workalso allows us to think the teletechnologies from writing that is already teletechnical.The teletechnologies go well beyond a certain current conception of« media » or « tele-communication », because the concept of teletechnology reach the heart of the movement of différance. We try to think the teletechnique with exteriorisation, ex-appropriation, trace, archive, etc. And in the heart of différance, the iteration as repetition in difference leads us to think newly the same (le même). The same is not stable, is in distance with it self and open to the other. We should search the archi-technicity in this opening to the other that is related to differential iterability. It has to be noted that the archi-technicity is a technicity which remains open to the incalculable, to the event (l’événement)