Dissertations / Theses on the topic 'Digital continuum'
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1
Hellmer, Erica. "Authenticity in Electronic Archives : Securing Digital Records." Thesis, Mittuniversitetet, Avdelningen för arkiv- och datavetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-25617.
Abstract:
Abstrakt Den snabba tekniska utvecklingen har lett till ökad produktion av digitala handlingar/records och transaktioner. Inom e-arkivens domäner, har detta medfört ett ökat tryck på det tekniska området för att kunna garantera autenticitet av bevarad information över tid. Tidsstämplingstekniker är ett sätt att säkerställa digital information för en särskild tidpunkt och kan användas för att garantera autenticitet av digital information över tid. Denna magisteruppsats undersöker funktionen tidsstämpling inom e-arkivens domäner genom en kvalitativ metod med fem semistrukturerade intervjuer av fem svenska organisationer. I undersökningen ingår också en fallstudie av det svenska innovationsföretaget Enigio Time AB för att ge en förståelse av tidsstämplingstekniker och av deras tjänst time:stamp. Den teoretiska utgångspunkten i denna magisteruppsats är records continuum model med dels dess syn på kontinuitet i handlingar/records och dels dess belysande av skapelseögonblicket av handlingar/records. Den internationella standarden OAIS (Open Archival Information System) används för att hantera digital information och är, i denna uppsats, använd för att analysera hanteringen i dokumenthanteringssystem inom de fem organisationerna. Resultaten visar att denna snabba tekniska utveckling har komplicerat dels hanteringen i att säkerställa att digitala handlingar/records inte kan bli manipulerade eller ändrade och dels för att fortsatt kunna garantera autenticitet i ett långtidsperspektiv. Undersökningen visar även att organisationerna kan garantera att det bevarade materialet inte kommer att ändras när det väl är inne i arkivet men dess autenticitet, innan de kommer innanför arkivens trösklar, kan aldrig bekräftas. I och med att den moderna tiden producerar och bevarar enorma mängder data så bör detta starta med skapelsen av ett digitalt record tillsammans med bättre strukturerad metadatascheman som är säkrade i tid.Abstract The rapid ongoing technical development has led to increased production of digital records and transactions. In the domain of electronic archives, this has put pressure on the technical area in order to guarantee authenticity of preserved information over time. Time stamping techniques are one way to secure digital information at a certain point in time and can be employed to guarantee authenticity of digital information over time. This study examines the function of time stamping within the domain of electronic archives and is conducted with a qualitative method using semi-structured interviews on five Swedish organisations. The study is complemented with a case-study of the Swedish innovation company Enigio Time AB in order to gain understanding in time stamping techniques and their service time:stamp. The theoretical framework in this study is the records continuum model with the view of the continuity in records and its illumination of the point of creation. The international standard OAIS (Open Archival Information System) is used by several electronic models to manage digital information and is, in this study, used to analyse the management in record keeping within the five organisations. The conclusion is that this rapid technological development has complicated the management of secure digital records from manipulation and guaranteeing the authenticity in a long term perspective. The study further shows that organisations may guarantee that records will not change once they are received into the archive but the authenticity of them, before they were delivered, can never be confirmed. Since the modern information era produces and preserves enormous amounts of data, this has to start with the creation of the digital record where better structured metadata schemes are secured in time.
2
Dalbello, Marija. "Circulating Culture for the Knowledge Continuum: Living History, Digital History and the History Web." Vilnius University Press, 2008. http://hdl.handle.net/10150/106405.
Abstract:
This paper was presented as invited plenary keynote address.This article surveys the cultural record in the digital environments and the current efforts to capture this record and circulate it as knowledge, documents, and collections in memory institutions, and provide a basis for the creation of new knowledge. The goals of digital preservation are interpreted in the light of recent arguments about the role of the humanities in providing access to the complete human experience, of the changing idea of the archive representing that experience, and of the roles of memory institutions in supporting the humanities project. Two sets of current preservation activities are identified and surveyed - web archiving (of national web spaces, web spheres) and curated collections of primary sources from the history web. The emerging forms of interpretive and point-of-view history, invented archives, and digital libraries capturing local history, everyday experience and community memory illustrate how digital media can support interpretive and multi-perspective historiography.
3
Gilmore, Daniel. "Another Brick in the Wall: Public Space, Visual Hegemonic Resistance, and the Physical/Digital Continuum." Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/communication_theses/91.
Abstract:
In this thesis I will demonstrate that there is a similarity between the use of physical walls and digital walls as means of ideological dissemination by power structures as well as socio-political protesters. Also, I will show that their use in this manner not only changes the way that both function ideologically, but also changes the environment that these walls are created/exist in as well. The first case study will analyze Banksy’s employment of carnivalesque graffiti as a means of protest. The second case study will analyze the use of digital public space and “walls” created within social media as tools of protest, paralleling the earlier examples pertaining to the physical walls of public space. The third case study will look at the employment of the digital “walls” of Facebook and Twitter in conjunction with the use of public space in Cairo and its role in the 2011 Egyptian Revolution.
4
Dingman, James Steven. "The development and application of generalized higher order filtering techniques to the continuum wave equations /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487268021749887.
5
Kimmig, François. "Multi-scale modeling of muscle contraction : From stochastic dynamics of molecular motors to continuum mechanics." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX071/document.
Abstract:
L'objectif de cette thèse est la modélisation mathématique des mécanismes de contraction musculaire à l'échelle microscopique dans le but de proposer et d'intégrer ces modèles dans un environnement de simulation cardiaque multi-échelle.Ce travail est réalisé dans le contexte de la médecine numérique, qui propose d'améliorer le traitement des patients par l'utilisation d'outils numériques.La première contribution de cette thèse est une analyse bibliographique des travaux expérimentaux caractérisant l’interaction actine-myosine et ses régulations afin de compiler les informations sous une forme utilisable pour le développement de modèles.Cette étape est une condition préalable essentielle à la modélisation.Nous proposons ensuite une hiérarchie de modèles de contraction musculaire à partir d'un modèle stochastique raffiné existant, mais validé uniquement pour les muscles squelettiques, en appliquant des hypothèses de simplification successives.Les étapes de simplification transforment l'équation différentielle stochastique initiale en une équation aux dérivées partielles avec une description qui fait partie de la famille de modèles dérivée du modèle Huxley'57.Une simplification supplémentaire conduit ensuite à un modèle décrit par un ensemble d'équations différentielles ordinaires.La pertinence des modèles proposés, qui ciblent différentes échelles de temps, est démontrée en les comparant aux données expérimentales obtenues avec des muscles cardiaques, et leur domaine de validité est étudié.Pour intégrer ces descriptions dans un environnement de simulation cardiaque, nous avons étendu ces modèles afin de prendre en compte les mécanismes de régulation de la force qui se produisent in vivo.Cela conduit à de nouvelles équations aux dérivées partielles.Ensuite, nous lions les modèles de contraction microscopiques à un modèle d’organe macroscopique.Nous suivons pour cela une approche fondée sur les principes thermodynamiques pour traiter la nature multi-échelle en temps et en espace du tissu musculaire aux niveaux continu et discret.La validité de cet environnement de simulation est démontrée en présentant sa capacité à reproduire le comportement du coeur et en particulier les caractéristiques essentielles de l'effet Frank-StarlingThis PhD thesis deals with the mathematical description of the micro-scale muscle contraction mechanisms with the aim of proposing and integrating our models into a multiscale heart simulation framework.This research effort is made in the context of digital medicine, which proposes to improve the treatment of patients with the use of numerical tools.The first contribution of this thesis is a literature review of the experimental works characterizing the actin-myosin interaction and its regulations to compile information in a useable form for the development of models.This stage is an essential prerequisite to modeling.We then propose a hierarchy of muscle contraction models starting from a previously proposed refined stochastic model, which was only validated for skeletal muscles, and applying successive simplification assumptions.The simplification stages transform the initial stochastic differential equation into a partial differential equation with a model that is part of the Huxley'57 model family.A further simplification then leads to a description governed by a set of ordinary differential equations.The relevance of these models, targeting different time scales, is demonstrated by comparing them with experimental data obtained with cardiac muscles and their range of validity is investigated.To integrate these microscopic descriptions into a heart simulation framework, we extend the models to take into account the force regulation mechanisms that take place in vivo, leading to the derivation of new partial differential equations.Then, we link the microscopic contraction models to the macroscopic organ model.We follow for that an approach based on the thermodynamical principles to deal with the multi-scale nature in time and space of the muscle tissue at the continuous and at the discrete levels.The validity of this simulation framework is demonstrated by showing its ability to reproduce the heart behavior and in particular to capture the essential features of the Frank-Starling effect
6
Klareld, Ann-Sofie. "Closer Together or Further Apart? : Public administration and archives in the digital age." Doctoral thesis, Mittuniversitetet, Avdelningen för informationssystem och -teknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-31636.
Abstract:
The research presented in this thesis is about recordkeeping in the public sector, focusing especially on the relationship between the public administration and its archives, and selected aspects affecting the way this relationship is developing in the digital era. Two research questions are addressed: RQ1: What are ‘archives’ and ‘recordkeeping’ in the digital context and the developing e-government? RQ2: What are the indications of current and future challenges regarding the cooperation between public administration and archives? Six studies resulting in six papers form the basis of the thesis. Each study explores a unique aspect of how current developments, discussions, and decisions affect contemporary understanding and practices regarding archives and recordkeeping. Public records are authoritative information resources, crucial in the everyday lives of citizens. Public recordkeeping develops continuously alongside administrative practices, technological achievements, and political goals. Examples include the development of shared services within the public sector and the involvement of the private sector in public infrastructure projects through outsourcing. These processes are currently affected both by digital technologies, which offer new possibilities to create, use, and preserve records, and by e-government, characterized by the combination of information and communication technologies with organizational change to improve public services and democratic participation. In these processes, existing practices are reviewed and revised, and the concepts of ‘archives’ and ‘recordkeeping’ redefined. The research was pursued using an interpretive approach. The research methods used were concept analysis; discourse analysis; literary warrant analysis; phenomenography; critical theory; and the records continuum model as a theoretical structure. The results shows that common usage of the terms ‘archive’ and ‘recordkeeping’ is fluid and changing, which can make decision-making challenging and affect the relationship between archives and administration. Efforts to develop recordkeeping strategies may be hampered by factors related to the different ways in which the nature and role of archives and recordkeeping are perceived, including differing understandings of related concepts; varying discourses on what an archive (or e-archive) is or should be, and different ways of interpreting legal frameworks and their significance.Vid tidpunkten för disputationen var följande delarbeten opublicerade: delarbete 6 accepterat.
At the time of the doctoral defence the following papers were unpublished: paper 6 accepted.
God informationsförvaltning
En effektiv digital informationshantering
7
Herrera, Altamirano Elisa. "Correr importa. Devenires coporales posthumanos desde una aproximación etnográfica al running popular en Barcelona." Doctoral thesis, Universitat Oberta de Catalunya, 2018. http://hdl.handle.net/10803/664196.
Abstract:
Aquesta tesi se situa en la intersecció disciplinària de l'antropologia del cos, les epistemologies feministes i la geografia, i té per objectiu reflexionar des de la banda teòrica i metodològica sobre la corporalitat posthumana per mitjà de l'exploració etnogràfica del running, popular a Barcelona, com una pràctica de la vida quotidiana en l'època contemporània. La inquietud principal a la qual respon aquest treball és contribuir a la crida que des de les ciències socials crítiques es fa per a generar una nova economia de la representació del cos que parli en clau de transformacions, processos, fluxos i canvis i no de visions unitàries de l'ésser en les seves modalitats clàssiques duals i universalistes. Per això es parteix de la proposta d'una figuració anomenada contínuum cosciutat que planteja una mirada de continuïtat material entre cossos humans i contextos urbans, la qual s'activa per mitjà de les pràctiques quotidianes en moviment, en aquest cas el running no professional. Els eixos centrals d'aquesta recerca giren entorn de l'anàlisi relacional dels acoblaments entre els cossos que corren, els espais o ambients urbans i les tecnologies digitals.Esta tesis se ubica en la intersección disciplinar de la antropología del cuerpo, las epistemologías feministas y la geografía, y tiene por objetivo reflexionar teórica y metodológicamente sobre la corporalidad poshumana por medio de la exploración etnográfica del running, popular en Barcelona como una práctica de la vida cotidiana en la época contemporánea. La principal inquietud a la que responde este trabajo es contribuir al llamamiento que desde las ciencias sociales críticas se hace por generar una nueva economía de la representación del cuerpo que hable en clave de transformaciones, procesos, flujos y cambios y no de visiones unitarias del ser en sus modalidades clásicas duales y universalistas. Para ello, se parte de la propuesta de una figuración llamada continuum cuerpociudad que plantea una mirada de continuidad material entre cuerpos humanos y contextos urbanos, la cual se activa por medio de las prácticas cotidianas en movimiento, en este caso el running no profesional. Los ejes centrales de esta investigación giran en torno al análisis relacional de los ensamblajes entre los cuerpos que corren, los espacios o ambientes urbanos y las tecnologías digitales.
This thesis is situated at the disciplinary intersection between anthropology of the body, feminist epistemology and geography, and aims to reflect theoretically and methodologically on post-human corporeality through the ethnographic exploration of the everyday habit of running in Barcelona in the contemporary era. The main concern to which this research responds is the call from critical social sciences to construct new models of body representation based on flows, mutations, transformations, processes and changes rather than maintaining unitary visions of the self in its classic dualistic and universalist modalities. For this, I begin by proposing a concept I have termed 'continuum cuerpociudad' (body-city continuum) that suggests a material continuity between human bodies and urban environments that is activated through daily practices involving movement, in this case non-professional running. The central axes of this investigation revolve around the relational analysis of the union between the bodies that run, urban spaces and environments, and digital technologies.
8
Sjöberg, Annika. "E-arkivering hos stadsarkiv : Mellanarkivslösning i sitt sammanhang." Thesis, Uppsala universitet, Institutionen för ABM, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-235013.
Abstract:
Digital preservation is a relatively new subject to Swedish archives. Alhough computers have been used for a long time, preservation has been made on paper and stored on shelves. These days a lot of cities in Sweden have investigated how to best secure the digital information for the future through electronic archiving, e-archives. One option is to hand in the information as soon as possible, but to let the producer keep the information ownership yet some time. The idea is to let the producers of the information answer questions and hand out material, since they are more competent on their field. This thesis analyzes how five different cities have organized the submission of information. I have used archiving models and interviews. For comparison the cities creating their e-archives have been set against Stockholm. There archive has been up and running for some time. The conclusion is that the solution using a transfer archive could be useful, if the material has got a lot of secrecy and one needs specific knowledge to handle the questions. The theoretical framework has been the life cycle model versus the records continuum model. Swedish city archives embrace the continuum approach early in the creation of the information, but the archivists believe in the life cycle model where all long term preservation comes to the point where no further changes can be done, to protect the authenticity of the information. Two years master’s thesis in Archive, Library and Museum studies. Archival science.
9
Burgess, Elizabeth. "Understanding interactive fictions as a continuum : reciprocity in experimental writing, hypertext fiction, and video games." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/understanding-interactive-fictions-as-a-continuum-reciprocity-in-experimental-writing-hypertext-fiction-and-video-games(5202be2d-db6d-4791-aa53-004072ffa4a7).html.
Abstract:
This thesis examines key examples of materially experimental writing (B.S. Johnson’s The Unfortunates, Marc Saporta’s Composition No. 1, and Julio Cortázar’s Hopscotch), hypertext fiction (Geoff Ryman’s 253, in both the online and print versions), and video games (Catherine, L.A. Noire, The Elder Scrolls IV: Oblivion, and Phantasmagoria), and asks what new critical understanding of these ‘interactive’ texts, and their broader significance, can be developed by considering the examples as part of a textual continuum. Chapter one focuses on materially experimental writing as part of the textual continuum that is discussed throughout this thesis. It examines the form, function, and reception of key texts, and unpicks emerging issues surrounding truth and realism, the idea of the ostensibly ‘infinite’ text in relation to multicursality and potentiality, and the significance of the presence of authorial instructions that explain to readers how to interact with the texts. The discussions of chapter two centre on hypertext fiction, and examine the significance of new technologies to the acts of reading and writing. This chapter addresses hypertext fiction as part of the continuum on which materially experimental writing and video games are placed, and explores reciprocal concerns of reader agency, multicursality, and the idea of the ‘naturalness’ of hypertext as a method of reading and writing. Chapter three examines video games as part of the continuum, exploring the relationship between print textuality and digital textuality. This chapter draws together the discussions of reciprocity that are ongoing throughout the thesis, examines the significance of open world gaming environments to player agency, and unpicks the idea of empowerment in players and readers. This chapter concludes with a discussion of possible cultural reasons behind what I argue is the reader’s/player’s desire for a high level of perceived agency. The significance of this thesis, then, lies in how it establishes the existence of several reciprocal concerns in these texts including multicursality/potentiality, realism and the accurate representation of truth and, in particular, player and reader agency, which allow the texts to be placed on a textual continuum. This enables cross-media discussions of the reciprocal concerns raised in the texts, which ultimately reveals the ways in which our experiences with these interactive texts are deeply connected to our anxieties about agency in a cultural context in which individualism is encouraged, but our actual individual agency is highly limited.
10
Garcia, Julian. "Digitally Enhanced Continuous-Time Sigma-Delta Analogue-to-Digital Converters." Doctoral thesis, KTH, Integrerade komponenter och kretsar, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95447.
Abstract:
The continuous downscaling of CMOS technology presents advantagesand difficulties for IC design. While it allows faster, denser and more energy efficient digital circuits, it also imposes several challenges which limit the performance of analogue circuits. Concurrently, applications are continuously pushing the boundaries of power efficiency and throughput of electronic systems. Accordingly, IC design is increasingly shifting into highly digital systems with few necessary analogue components. Particularly, continuous-time (CT) sigma-delta (ΣΔ) analogue-to-digital converters (ADCs) have recently received a growing interest, covering high-resolution medium-speed requirementsor offering low power alternatives to low speed applications. However, there are still several aspects that deserve further investigation so as to enhancethe ADC’s performance and functionality. The objective of the research performed in this thesis is the investigation of digital enhancement solutions for CT ΣΔ ADCs. In particular, two aspects are considered in this work. First, highly digital techniques are investigated to minimize circuit impairments, with the objective of providing solutions with reduced analogue content. In this regard, a multi-bit CT ΣΔ modulator with reduced number of feedback levels is explored to minimize the use of linearisation techniques in the DAC. The proposed architecture is designed and validated through behavioural simulations targeting a mobile application. Additionally, a novel self-calibration technique, using test-signal injection and digital cancellation, is proposed to counteract process variations affecting single loop CT implementations. The effectiveness of the calibration technique is confirmed through corner simulations using behavioural models and shows that stability issues are minimized and that a 7 dB SNDR degradation can be avoided. The second aspect of this thesis investigates the use of high order CT modulators in incremental ΣΔ (IΣΔ) and extended-range IΣΔ ADCs, with the objective of offering low-power alternatives for low-speed high-resolution multi-channel applications. First, a 3rd order single loop CT IΣΔ ADC, targeting an 8-channel 500 Ksamples/sec rate per channel recording system for neuropotential sensors, is proposed, fabricated and tested. The proposed architecture lays the theoretical groundwork and demonstrates a competitive performance of high-order CT IΣΔ ADCs for low-power multi-channel applications. The ADC achieves 65.3 dB/64 dB SNR/SNDR and 68.2 dB dynamic range. The modulator consumes 96 μW from a 1.6 V power supply. Additionally, the use of extended range approach in CT IΣΔ ADCs is investigated,so as to reduce the required number of cycles per conversion while benefiting from the advantages of a CT implementation. The operation, influence of filter topology and impact of circuit non-idealities are first analysed using a general approach and later validated through a test-case. It was found that, by applying analogue-digital compensation in the digital domain, it is possible to minimize the noise leakage due to analogue-digital transfer function mismatches and benefit from relaxed amplifiers’ finite gain-bandwidth product and finite DC gain, allowing, as a consequence, a power conscious alternative.QC 20120528
11
Fréchard, Victor. "Contribution à l’étude de l’utilisation de la Stratoconception® pour la conception et la fabrication de composants non-standards pour l’architecture en bois." Electronic Thesis or Diss., Université de Lorraine, 2024. http://www.theses.fr/2024LORR0006.
Abstract:
L’architecture non-standard en bois explore l’étendue des possibilités techniques et esthétiques pour de nouveaux usages répondant à des exigences fonctionnelles cohérentes avec les enjeux environnementaux, sociétaux et économiques contemporains. Récemment introduite dans le secteur de la construction, mais absente des pratiques de la construction en bois, la fabrication additive, qui regroupe un ensemble de procédés, étend les limites des moyens de fabrication conventionnels par la liberté formelle accrue et la multifonctionnalisation des composants architecturaux qu’elle permet. Le procédé de Stratoconception® présente un fort potentiel d’application pour le développement d’architectures et de composants non-standards en bois, présentant une forte capacité d’adaptation aux moyens techniques et matériels de la construction en bois. Le procédé de Stratoconception®, en architecture, se limite à la réalisation de maquettes et de prototypes de petites dimensions et ne s’applique pas, jusqu’à présent, à la conception et à la fabrication de composants fonctionnels à usage structurel de petites comme de grandes dimensions. L’utilisation de ce procédé pour la réalisation de prototypes ou d’outillages pour l’industrie implique que la conception du processus de fabrication par Stratoconception® est indépendante de la conception des objets eux-mêmes, destinés à être réalisés par d’autres procédés de fabrication, alors que l’architecture non-standard privilégie un renforcement du lien entre la conception architecturale et les techniques de fabrication. Ce travail présente les résultats d’expériences de « conception-fabrication » par Stratoconception® de composants architecturaux menées, qui forment, avec l’étude bibliographique menée, une base de connaissance, orientée vers des enjeux identifiés, des mécanismes, des problématiques et des limites de l’utilisation de la Stratoconception® dans les pratiques de l’architecture et la construction en bois. Ces expériences ont mis en évidence le manque de flexibilité et d’outils d’évaluation du processus de production de composants architecturaux par Stratoconception® ainsi que l’interdépendance entre la conception et la fabrication. Nous avons également identifier des opportunités d’applications du procédé pour la conception et la production de composants architecturaux non-standards, particulièrement les nœuds d’assemblages en bois de treillis tridimensionnels et les parois. Afin d’obtenir un processus de conception applicable dans les pratiques de l’architecture et de la construction en bois, nous introduisons une méthode de conception pour la fabrication additive par Stratoconception® intégrant les contraintes et les opportunités du procédé dès l’étape de conception de la géométrie de la pièce en favorisant une évolution itérative de cette conception, orientée par les résultats de moteurs d’évaluation accompagnant le concepteur vers des prises de décision cohérentes avec des critères définis. La méthode proposée, implémentée dans des outils d’aide à la conception, permet la mise en place d’une continuité informationnelle numérique liant une conception paramétrique à une fabrication numérique en orientant le concepteur vers des solutions respectant des critères de faisabilité et de rationalisation de la production dès la phase amont de la conception de la géométrie du composant architecturalNon-standard timber architecture explores the scope of technical and aesthetic opportunities for new uses that correspond to functional requirements consistent with contemporary environmental, social and economic issues. Recently adopted by the construction industry, but absent from the timber construction practices, additive manufacturing, which brings a range of processes, extends the existing limitations of the subtractive and formatting manufacturing methods in the ability to produce complex shapes and multi-functionalized architectural components. The Stratoconception® process shares the technical and material means of the timber construction industry and presents a great potential to be implemented in the common practices to develop non-standard timber architecture and components. In architecture, the Stratoconception® process is limited to the production of small-scale models and prototypes and has not yet been applied to the design and the manufacturing of functional components, used for structural purposes, in either small or large dimensions. The use of this process to produce prototypes or tooling for the industry implies that the Stratoconception® manufacturing process design is independent of the design of the objects themselves, which are intended to be produced by other manufacturing processes, whereas non-standard architecture tends to strengthen the link between the architectural design and the manufacturing techniques. This work presents the results of Stratoconception® “design to manufacturing” experiences carried out on architectural components. These experiences, combined with the bibliographical study, constitute a knowledge base, oriented towards the issues, the mechanisms, the problems and the limits identified of the use of Stratoconception® in architecture and timber construction practices. These experiences have highlighted the lack of flexibility and development of evaluation tools of the Stratoconception® production process of architectural components, as well as the interdependence between design and manufacturing. We have also identified the opportunities to apply the process to the design and the production of non-standard architectural components, especially the timber assembly of the gridshell or lattice structures and the walls. To achieve a design process that can be applied in the timber architecture and construction practices, we introduce a design for additive manufacturing by Stratoconception® method, that integrates the constraints and the opportunities of the process right from the part geometry design stage and fosters the iterative evolution of the design, guided by the results of evaluation engines that support the designer in his decision-making. The proposed method, implemented in design support tools, creates a digital information continuum that connects parametric design to digital manufacturing, guiding the designer towards solutions that meet feasibility and production rationalization criteria right from the early design phase of the architectural component’s geometry
12
Sreenan, Cormac John. "Synchronisation services for digital continuous media." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260690.
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Souza, Julio Borges de. "Uma contribuição ao estudo da influencia de elos CC na dinamica de sistemas CA, atraves de simulação digital." [s.n.], 1986. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259346.
Abstract:
Orientadores: Jose Carlos de Oliveira , Andre Luis Morelato FrançaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica
Made available in DSpace on 2018-07-16T20:19:14Z (GMT). No. of bitstreams: 1 Souza_JulioBorgesde_M.pdf: 10517790 bytes, checksum: 28915bef80eebb6a54947c1595e0777f (MD5) Previous issue date: 1986
Resumo: Este trabalho tem objetivo o estudo da influência de elos CC na dinâmica de sistemas CA. Para tanto são pesquisados e implementados vários modelos visando a modulação da potência ativa transmitida pelo elo e também a modulação do ângulo de extinção da inversora. E também investigado o efeito da reatância de comutação das conversoras e sobre o cálculo das potências requeridas pelas mesmas. Casos práticos são simulados, analisados e discutidos. concluindo-se a respeito da eficiência das modelagens apresentadas e conseqüente efeito sobre o amortecimento das oscilações e controle de freqüência
Abstract: This work aims to study the effeet of HVDC systems upon the dynamie of AC systems. In this way, several models which use de power modulation an extinction angle control are considered and included into a digital transient stability programme. Apart from this, the effect or the AC system eommutation reactanee on the active and reactive AC power calculations is investigated using a digital computer programme. Practical studies are then carried out and the corresponding results are analised so to conclude about the required damping introduced by the functions included on the oscillations and frequency control
Mestrado
Mestre em Engenharia Elétrica
14
Uscka-Wehlou, Hanna. "Digital lines, Sturmian words, and continued fractions." Doctoral thesis, Uppsala : Matematiska institutionen, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-107274.
15
Harrold, William. "Detection of continuous phase modulation." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235856.
Abstract:
The use of coded modulations such as continuous phase modulation (CPM) can improve the power and bandwidth efficiency of digital communication links. The price paid for these gains is in increased receiver complexity. The power efficiency attainable with the highly redundant signal sets employed by coded modulations becomes limited by the ability of the receiver to achieve accurate carrier phase synchronisation. Power efficiency is assessed in terms of the bit error rate performance in white Gaussian noise. A new CPM detector called the partially coherent Viterbi algorithm (PCVA) is introduced which tries to preserve the power efficiency in the presence of mild phase perturbations. The detector employs the Viterbi algorithm with a new partially coherent decision metric. Carrier phase estimates are derived dynamically from the detector's own survivor paths. In the presence of phase jitter, the PCVA is superior to a Viterbi decision directed phase locked loop. The PCVA could be applied to the detection of modulation schemes other than CPM. An error analysis of the PCVA in the absence of phase jitter provides a new and more realistic way of assessing the relative merits of various CPM schemes. Unmerged error events have been found to occur when CPM is detected with carrier phase uncertainty. The carrier phase estimator pulls in the residual phase error in such cases. A reduced state Viterbi algorithm has been examined when using the partially coherent decision metric. Receiver complexity reduction is still possible even when the detector is not coherent. A method of acquiring the carrier frequency accurately from the received CPM signal is described. The other main research goal has been the development of a new low signal-to-noise ratio (SNR) error probability analysis for coherently detected CPM. CPM is designed for use on power limited channels, but the existing error probability analysis is only accurate at high SNR. The problem at low SNR is that several error events become significant, not just the one at minimum squared Euclidean distance. The new analysis considers many events and makes statistical allowance for their pairwise interaction. The probability of events intersecting and reclosing each other has not been analysed before. This work applies to maximum likelihood sequence detection on a memoryless channel in general. A new survey of CPM error performance is made and proves the existing minimum distance results to be often optimistic especially at low and intermediate signal-to-noise ratios. The new approximation is closer to the simulated error rates where these are available. The coherent error analysis involves some computation but it is still approximately three orders of magnitude faster than simulation.
16
Ang, Chu Suan. "Continuous media in fast networks." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239753.
17
Delic-Ibukic, Alma. "Continuous Digital Calibration of Pipelined A/D Converters." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/Delic-IbukicA2004.pdf.
18
Pettersson, Karl. "Integritet och långsiktig användbarhet hos textdokument : En avvägningsproblematik vid digitalt bevarande." Thesis, Uppsala universitet, Institutionen för ABM, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-253197.
Abstract:
This thesis is about a potential trade-off between integrity and long-term usability in the choice of file formats for preservation of text documents. Five common formats are discussed: plain text, PDF/A, Office Open XML Document, Open Document Text, and Markdown. The formats are compared with respect to four criteria related to integrity and usability and to the records continuum model: support by widely used software, stability, rendering of contents and reusability. It is concluded that no single format is optimal with respect to all four criteria, when it comes to preserving typical documents in a modern environment, with more or less complex formatting and document structure. Therefore, the feasiblity of using two or more formats for preservation of a single document (e.g. PDF/A combined with Markdown and/or Office Open XML) is discussed. It is necessary to weigh the importance of integrity and long-term usability against the costs of preserving documents in multiple formats. This is a two years master's thesis in Archival Science, Library and Museum studies.
19
Tao, Sha. "Power-Efficient Continuous-Time Incremental Sigma-Delta Analog-to-Digital Converters." Doctoral thesis, KTH, Integrerade komponenter och kretsar, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164282.
Abstract:
Over the past decade, there has been a growing interest in the devel- opment of integrated circuits (ICs) for wearable or implantable biosensors, aiming at providing personalized healthcare services and reducing the health-care expenses. In biosensor ICs, the analog-to-digital converter (ADC) is a key building block that acts as a bridge between analog signals and digital processors. Since most of the biosensors are attached to or implanted in hu- man bodies and powered by either portable batteries or harvested energy, ultra-low-power operation is often required. The stringent power budget im- poses challenges in designing power-efficient ADCs, especially when targeting high-resolution. Among different ADC architectures, the Sigma-Delta (Σ∆) ADC has emerged as the most suitable for low-power, high-resolution appli- cations. This thesis aims to enhance the power efficiency of continuous-time (CT) incremental Σ∆ (IΣ∆) ADCs by exploring design techniques at both architectural and circuit levels. The impact of feedback DACs in CT IΣ∆ ADCs is investigated, so as to provide power-efficient feedback DAC solutions, suitable for biosensor ap- plications. Different DAC schemes are examined analytically considering the trade-off between timing error sensitivity and power consumption. The an- alytical results are verified through behavioral simulations covering both the conventional and incremental Σ∆ modes. Additionally, by considering a typi- cal biosensor application, different feedback DACs are further compared, aim- ing to offer a reference for selecting a power-efficient DAC scheme. A two-step CT IΣ∆ ADC is proposed, analyzed, implemented and tested, with the objective of offering flexible and power-efficient A/D conversion in neural recording systems. By pipelining two CT IΣ∆ ADCs, the pro- posed ADC can achieve high-resolution without sacrificing the conversion rate. Power-efficient circuits are proposed to implement the active blocks of the proposed ADC. The feasibility and power efficiency of the two-step CT IΣ∆ ADC are validated by measurement results. Furthermore, enhancement techniques from both the architecture and circuit perspectives are discussed and implemented, which are validated by post-layout simulations. A comparative study of several CT IΣ∆ ADC architectures is presented, aiming to boost the power efficiency by reducing the number of cycles per con- version while benefiting from the advantage of CT implementation. Five CT IΣ∆ ADC architectures are analyzed and simulated to evaluate their effective- ness under ideal conditions. Based on the theoretical results, a second-order CT IΣ∆ ADC and an extended-range CT IΣ∆ ADC are selected as implemen- tation case studies together with the proposed two-step CT IΣ∆ ADC. The impact of critical circuit non-idealities is investigated. The three ADCs are then implemented and fabricated on a single chip. Experimental results reveal that the three prototype ADCs improve considerably the power efficiency of existing CT IΣ∆ ADCs while being very competitive when compared to all types of the state-of-the-art IΣ∆ ADCs.QC 20150422
20
Golby, John N. A. "Investigation into PRS-precoded, constant-envelope, continuous-phase digital modulation schemes." Master's thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/8345.
Abstract:
Bibliography: leaves 78-79.Partial response signaling ( PRS) has been used successfully to improve the spectral properties of Pulse Amplitude Modulated (PAM) digital transmission systems. This thesis investigation studied the effect of PRS on frequency- and phase-modulated carrier systems, in particular on their spectral performance and their maintenance of constant envelope.
21
Durham, Anna Mary. "Digitally tunable continuous-time filters for VLSI." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315304.
22
Thandri, Bharath Kumar. "Design of RF/IF analog to digital converters for software radio communication receivers." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5774.
Abstract:
Software radio architecture can support multiple standards by performing analogto-
digital (A/D) conversion of the radio frequency (RF) signals and running
reconfigurable software programs on the backend digital signal processor (DSP). A
slight variation of this architecture is the software defined radio architecture in which the
A/D conversion is performed on intermediate frequency (IF) signals after a single down
conversion.
The first part of this research deals with the design and implementation of a
fourth order continuous time bandpass sigma-delta (CT BP) C based on LC filters
for direct RF digitization at 950 MHz with a clock frequency of 3.8 GHz. A new ADC
architecture is proposed which uses only non-return to zero feedback digital to analog
converter pulses to mitigate problems associated with clock jitter. The architecture also has full control over tuning of the coefficients of the noise transfer function for obtaining the best signal to noise ratio (SNR) performance. The operation of the architecture is examined in detail and extra design parameters are introduced to ensure robust operation of the ADC. Measurement results of the ADC, implemented in IBM 0.25 µm SiGe BiCMOS technology, show SNR of 63 dB and 59 dB in signal bandwidths of 200 kHz
and 1 MHz, respectively, around 950 MHz while consuming 75 mW of power from ±
1.25 V supply.
The second part of this research deals with the design of a fourth order CT BP ADC based on gm-C integrators with an automatic digital tuning scheme for IF
digitization at 125 MHz and a clock frequency of 500 MHz. A linearized CMOS OTA
architecture combines both cross coupling and source degeneration in order to obtain
good IM3 performance. A system level digital tuning scheme is proposed to tune the
ADC performance over process, voltage and temperature variations. The output bit
stream of the ADC is captured using an external DSP, where a software tuning algorithm
tunes the ADC parameters for best SNR performance. The IF ADC was designed in
TSMC 0.35 µm CMOS technology and it consumes 152 mW of power from ± 1.65 V
supply.
23
Gao, Xi. "Digital RF-over-Fiber Links Based on Continuous-Time Delta Sigma Modulation." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1579018039888542.
24
Cervone, Luca <1981>. "Digital Technologies for Deliberative Democracies: Models and Applications for Continuous Civic Engagement." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amsdottorato.unibo.it/8210/1/CERVONE_LUCA_TESI.pdf.
Abstract:
In the last fifty years, scholars have widely studied Deliberative Democracy and Deliberative Systems and proposed them as an alternative or integration to Rep- resentative and Participatory Democracy. The latter can on one side deal with communication challenges of diverse and pluralist modern Societies by opening Democratic procedures to Citizens and engaging them in Democratic decision- making procedures. On the other side, as like as Representative Democracies, Participatory Democracies do not promote deliberations to foster Citizens to reach a consensus on Societal issues. Indeed, Participatory Democracies are based on intrinsic mechanisms of aggregation of votes, not optimized to fulfil the diverse cog- nitive characteristics of Citizens, and are usually stand-alone processes that can not be interconnected. Gamified Online Deliberative Systems can fill these gaps. The first research goal of this work is to analyze Democracies, expose different models of them, and investigate from different perspectives the causes of the current crisis of Representative Democracies and the lack of Participatory Democracies models. The second research goal is to analyze the literature on Deliberative Democracies and Deliberative Systems in order to delineate a framework of requirements to im- plement the features needed for legitimated Deliberative Systems. The framework is then used to analyze a set of online tools for deliberation and cover the third research question: understand if these tools implement legitimacy features of on- line deliberation and can be connected to Deliberative Systems. The last research goal of this work is to investigate the cognitive characteristics of Citizens involved in deliberations and the motivations that may keep them continuously engaged in Deliberative Systems. After having exposed Gamification theories, this work proposes a fully gamified model for Online Deliberative Systems and describes a practical implementation of the model.
25
Ng, Sheung Yan. "A continuous-time asynchronous Sigma Delta analog to digital converter for broadband wireless receiver with adaptive digital calibration technique." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1253559906.
26
Loureiro, Ricardo Augusto Martineli. "Controle do nivel do aço de uma maquina de lingotamento continuo." [s.n.], 1994. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259977.
Abstract:
Orientador: Wagner Caradori do AmaralDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica
Made available in DSpace on 2018-07-21T17:47:47Z (GMT). No. of bitstreams: 1 Loureiro_RicardoAugustoMartineli_M.pdf: 7426886 bytes, checksum: 665c6b8dbef8581afe4d6c8731e13938 (MD5) Previous issue date: 1994
Resumo: Este trabalho analisa a utilização de controladores adaptativos no controle do nível do aço no molde de uma máquina de lingotamento contínuo. São utilizados dois tipos de controladores adaptativos: o controlador de variância mínima generalizada (GMV) e o controlador preditivo generalizado (GPC). O desempenho destes controladores são comparados com o controlador proporcional-integral-derivativo (PID) que apresenta parâmetros fixos. É apresentada uma breve explicação sobre o processo de lingotamento contínuo e a importância do controle do nível do aço para a qualidade dos lingotes produzidos, bem como segurança e produtividade do sistema. Apresenta-se as características do processo que motivam a utilização de controladores adaptativos, tais como: não-linearidades, parâmetros variantes no tempo, presenças de ruído e atrasos de transporte. É desenvolvido o modelo do processo e apresentado o simulador desenvolvido neste trabalho para o estudo dos diferentes controladores. São apresentados os controladores GMV e GPC com o desenvolvimento matemático de cada um, bem como os algoritmos implementados. São apresentados os resultados de simulações para diferentes situações que ilustram as características dos controladores perante fatores importantes ao sistema controlado, tais como: sobre-elevação inicial, variância do nível de aço no molde, efeito do rompimento de escória nas válvulas de controle, variação do sinal de controle, presença de ruído no sistema de controle, etc
Mestrado
Mestre em Engenharia Elétrica
27
Yiin, Lihbor. "Sequence estimation receivers for trellis-coded continuous phase modulation on mobile channels." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/14818.
28
Van, Ramesdonk Paul. "Continued forensic development - investigation into current trends and proposed model for digital forensic practitioners." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20707.
Abstract:
Continuous professional development has been looked at in many professions over the years, most notably in primary and secondary education and in the medical fields. With digital forensics being cast into the limelight due to the rapid advancements in technology, academic institutions have added courses to address the void created by the boom in the industry. Little research has been done to address the issues that have now become apparent concerning continued learning in this field. The purpose of this research was to investigate the kinds of frameworks and methods used in other professions, and how the practitioners themselves see career development, and to create a framework that could be used to keep abreast of developments in the field of digital forensics, be it changes in the law, case law, or changes in software.
The data analysis showed quite a number of continued learning approaches that could be employed in the digital/computer forensic fields to achieve the objective of keeping abreast of changes in the field. Some, understandably, are due to the nature of the discipline. As part of practitioners' current approach to continued learning, they rely heavily on knowledge sharing in the form of learning from other professionals, through self-study by reading books, articles and research conducted in the forensic field, the use of Information and Communications Technology (ICT) for education, and the use of Internet sources such as user forums, Facebook groups, and web-blogs. The majority of the respondents had received formal training in digital forensics, and of the total number of participants, only six percent had not been involved in any form of continued learning activities in the past five years.
When looking at the data obtained, and because there are no formal requirements to perform continued learning in the digital/computer forensic field, it becomes clear that individuals themselves need to be self-driven to keep up to date with changes in the field. As seen in studies focused on continued learning activities in other professions, the research shows that digital/computer forensic practitioners experience similar barriers to their own approaches to continued learning.
29
Panzitta, Michael James. "Synthesis of numerical integrators for the real-time digital simulation of continuous systems." Doctoral diss., University of Central Florida, 1994. http://digital.library.ucf.edu/cdm/ref/collection/RTD/id/3046.
Abstract:
University of Central Florida College of Engineering ThesisReal-time digital simulation is a powerful means for engineers and scientists in government, industry, and academia to perform research and training as well as serving as a basis for many commercial applications. Due to the special constraints imposed by digitally simulating continuous systems in real time, however, many of these systems either require costly high-speed components or are unable to provide suitable performance characteristics using affordable computers. This dissertation describes a new technique for the synthesis of numerical integrators specifically designed for the real-time digital simulation of continuous systems. This methodology is based upon the fact that the state derivatives in a simulation model typically have a significantly limited bandwidth. This information is exploited to improve the efficiency of numerical integrators by selecting the coefficients of a general-form integrator such that it approximates an ideal integrator over the limited frequency spectrum of the state derivative.
Ph.D.
Doctorate;
Department of Electrical and Computer Engineering
Engineering
Electrical and Computer Engineering
135 p.
xix, 135 leaves, bound : ill. ; 28 cm.
30
Liu, Yuguang. "Integrating Continuous and Digital Microfluidics in Electrowetting-on-dielectrics (EWOD) for Heterogeneous Immunoassay." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1458300195.
31
Chhetri, Dhurv, and Venkata Narasimha Manyam. "A Continuous-Time ADC and DSP for Smart Dust." Thesis, Linköpings universitet, Elektroniksystem, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-80586.
Abstract:
Recently, smart dust or wireless sensor networks are gaining more attention.These autonomous, ultra-low power sensor-based electronic devices sense and process burst-type environmental variations and pass the data from one node (mote) to another in an ad-hoc network. Subsystems for smart dust are typically the analog interface (AI), analog-to-digital converter (ADC), digital signal processor (DSP), digital-to-analog converter (DAC), power management, and transceiver for communication. This thesis project describes an event-driven (ED) digital signal processing system (ADC, DSP and DAC) operating in continuous-time (CT) with smart dust as the target application. The benefits of the CT system compared to its conventional counterpart are lower in-band quantization noise and no requirement of a clock generator and anti-aliasing filter, which makes it suitable for processing burst-type data signals. A clockless EDADC system based on a CT delta modulation (DM) technique is presented. The ADC output is digital data, continuous in time, known as “data token”. The ADC employs an unbuffered, area efficient, segmented resistor-string (R-string) feedback DAC. A study of different segmented R-string DAC architectures is presented. A comparison in component reduction with prior art shows nearly 87.5% reduction of resistors and switches in the DAC and the D flip-flops in the bidirectional shift registers for an 8-bit ADC, utilizing the proposed segmented DAC architecture. The obtained SNDR for the 3-bit, 4-bit and 8-bit ADC system is 22.696 dB, 30.435 dB and 55.73 dB, respectively, with the band of interest as 220.5 kHz. The CTDSP operates asynchronously and process the data token obtained from the EDADC. A clockless transversal direct-form finite impulse response (FIR) low-pass filter (LPF) is designed. Systematic top-down test-driven methodology is employed through out the project. Initially, MATLAB models are used to compare the CT systems with the sampled systems. The complete CTDSP system is implemented in Cadence design environment. The thesis has resulted in two conference contributions. One for the 20th European Conference on Circuit Theory and Design, ECCTD’11 and the other for the 19th IFIP/IEEE International Conference on Very Large Scale Integration, VLSI-SoC’11. We obtained the second-best student paper award at the ECCTD.
32
Melin, Erik. "Digital Geometry and Khalimsky Spaces." Doctoral thesis, Uppsala University, Department of Mathematics, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8419.
Abstract:
Digital geometry is the geometry of digital images. Compared to Euclid’s geometry, which has been studied for more than two thousand years, this field is very young.
Efim Khalimsky’s topology on the integers, invented in the 1970s, is a digital counterpart of the Euclidean topology on the real line. The Khalimsky topology became widely known to researchers in digital geometry and computer imagery during the early 1990s.
Suppose that a continuous function is defined on a subspace of an n-dimensional Khalimsky space. One question to ask is whether this function can be extended to a continuous function defined on the whole space. We solve this problem. A related problem is to characterize the subspaces on which every continuous function can be extended. Also this problem is solved.
We generalize and solve the extension problem for integer-valued, Khalimsky-continuous functions defined on arbitrary smallest-neighborhood spaces, also called Alexandrov spaces.
The notion of a digital straight line was clarified in 1974 by Azriel Rosenfeld. We introduce another type of digital straight line, a line that respects the Khalimsky topology in the sense that a line is a topological embedding of the Khalimsky line into the Khalimsky plane.
In higher dimensions, we generalize this construction to digital Khalimsky hyperplanes, surfaces and curves by digitization of real objects. In particular we study approximation properties and topological separation properties.
The last paper is about Khalimsky manifolds, spaces that are locally homeomorphic to n-dimensional Khalimsky space. We study different definitions and address basic questions such as uniqueness of dimension and existence of certain manifolds.
33
Nyman, Järhult Josefin, Matilda Rosén, and Caitlin Le. "Evenemangsorganisationer : upplevelser av digital kommunikation." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-26610.
Abstract:
Personer väljer att volontärarbeta för många fler anledningar än för att ideellt arbete måste genomföras för en förening. Volontärarbete kan ge en individ erfarenheter, social gemenskap och få känna sig behövd samt uppskattad i det arbete som utförs. En utmaning underCovid-19-pandemin var att olika restriktioner tillsattes och de flesta evenemang ställdes in. De enda evenemang som var tillåtna att genomföras var elitidrottsevenemang med hårda förhållningsregler anpassade efter pandemin. En förhållningsregel var att inga fysiska träffar fick genomföras vilket betydde att alla förberedelser med volontärerna fick organisationerna genomföra digitalt. Detta problem ansågs intressant och därför valdes detta fenomen att studeras mer ingående. Studiens syfte var att utifrån ett digitalt kommunikationsperspektivundersöka hur evenemangsorganisationer upplevt den sociala interaktionen via digitala kanaler. Studien har använts sig av en kvalitativt intervjumetod där fem olika specialister harintervjuats samt övrigt material som studien tilldelats från respektive respondent. Med hjälp av intervjuerna undersökte vi hur organisationerna har upplevt den social interaktionen och tillhörigheten via de digitala kanalerna samt om de digitala kanalerna kunde upplevas som enenvägskommunikation. Studiens resultat visar att det finns både fördelar och nackdelar med att förbereda sina volontärer inför ett fysiskt evenemang med hjälp av digital kommunikation. Evenemangsorganisationer anser att det digitala inte kan ersätta det fysiska mötet förvolontärerna eller för organisationerna, men det digitala kan definitivt vara ett komplement till de fysiska mötena i framtiden.There are many reasons for why people choose to volunteer and carry out non-profit work for an association: socialization, gaining experience and a feeling of being needed and being appreciated for the work they do. Due to the challenges that arose during the Covid-19pandemic, strict restrictions were implemented, meaning that companies and organizations had to adapt and therefore cancel most of their events. The only events that were allowed to take place were elite sports events with strict rules and they had to follow the authorities guidelines of the pandemic. These guidelines encouraged people to not attend physical meetings, which meant that all preparations with the volunteers had to be carried out digitally. This problem was considered interesting and therefore this phenomenon was chosen to be studied more in detail. The purpose of this study was to examine, from the perspective of digital communication, how event organizations experienced social interaction through digital channels. A qualitative interview method has been conducted for this study. Five different specialists who were in charge of the digital communication to their volunteers have been interviewed as well as other material that the study has gained access to from each respondent. During the interviews the respondents explained how they worked with different digital tools in order to reach out and communicate with their volunteers digitally. In addition, we have studied how the event organizations have experienced the social interaction through digital channels and the overall experience of these different channels. The results of this study show that there are both advantages and disadvantages when preparing volunteers digitally for a physical event. Event organizations believe that the digital aspect is something that can not replace the physical meetings for volunteers and organizations. However, digital meetings can instead be seen as a complement to the physical meetings in the future. The following essay is written in Swedish.
34
Croal, Callum. "Quantum correlations in continuous variable mixed states : from discord to signatures." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/8969.
Abstract:
This thesis studies continuous variable mixed states with the aim of better understanding the fundamental behaviour of quantum correlations in such states, as well as searching for applications of these correlations. I first investigate the interesting phenomenon of discord increase under local loss and explain the behaviour by considering the non-orthogonality of quantum states. I then explore the counter-intuitive result where entanglement can be created by a passive optical beamsplitter, even if the input states are classical, as long as the input states are part of a larger globally nonclassical system. This result emphasises the importance of global correlations in a quantum state, and I propose an application of this protocol in the form of quantum dense coding. Finally, I develop a quantum digital signature protocol that can be described entirely using the continuous variable formalism. Quantum digital signatures provide a method to ensure the integrity and provenance of a message using quantum states. They follow a similar method to quantum key distribution (QKD), but require less post-processing, which means they can sometimes be implemented over channels that are inappropriate for QKD. The method I propose uses homodyne measurement to verify the signature, unlike previous protocols that use single photon detection. The single photon detection of previous methods is designed to give unambiguous results about the signature, but this comes at the cost of getting no information much of the time. Using homodyne detection has the advantage of giving results all the time, but this means that measurement results always have some ambiguity. I show that, even with this ambiguity, the signature protocol based on homodyne measurement outperforms previous protocols, with the advantage enhanced when technical considerations are included. Therefore this represents an interesting new direction in the search for a practical quantum digital signature scheme.
35
Janka, Randall Scott. "A model-continuous specification and design methodology for embedded multiprocessor signal processing systems." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15630.
36
Samieinia, Shiva. "Digital Geometry, Combinatorics, and Discrete Optimization." Doctoral thesis, Stockholms universitet, Matematiska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-47399.
Abstract:
This thesis consists of two parts: digital geometry and discrete optimization. In the first part we study the structure of digital straight line segments. We also study digital curves from a combinatorial point of view. In Paper I we study the straightness in the 8-connected plane and in the Khalimsky plane by considering vertical distances and unions of two segments. We show that we can investigate the straightness of Khalimsky arcs by using our knowledge from the 8-connected plane. In Paper II we determine the number of Khalimsky-continuous functions with 2, 3 and 4 points in their codomain. These enumerations yield examples of known sequences as well as new ones. We also study the asymptotic behavior of each of them. In Paper III we study the number of Khalimsky-continuous functions with codomain Z and N. This gives us examples of Schröder and Delannoy numbers. As a byproduct we get some relations between these numbers. In Paper IV we study the number of Khalimsky-continuous functions between two points in a rectangle. Using a generating function we get a recurrence formula yielding this numbers. In the second part we study an analogue of discrete convexity, namely lateral convexity. In Paper V we define by means of difference operators the class of lateral convexity. The functions have plus infinity in their codomain. For the real-valued functions we need to check the difference operators for a smaller number of points. We study the relation between this class and integral convexity. In Paper VI we study the marginal function of real-valued functions in this class and its generalization. We show that for two points with a certain distance we have a Lipschitz property for the points where the infimum is attained. We show that if a function is in this class, the marginal function is also in the same class.At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 4: Submitted. Paper 5: Manuscript. Paper 6: Manuscript.
37
Markazi, Amir H. D. (Amir Hossein Davaie). "A new approach to the digital implementation of analog controllers and continuous-time reference models." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28836.
Abstract:
In this thesis, a new approach to the design of digital control systems is introduced. In particular, three new methods are presented, two for the digital redesign of a pre-designed analog control system, and one for the digital implementation of a pre-specified continuous-time reference model.The proposed approach is based on the novel idea of relating digital and analog control systems through their plant-input transfer functions, i.e., the transfer function from the command input to the plant input.
The main advantages of the new approach are the guaranteed closed-loop stability for almost all sampling periods, and the recovery of the continuous-time performance when the sampling period approaches zero. The effectiveness of the proposed approach is illustrated by applying it to some famous example, borrowed form other references for the purpose of comparison.
The proposed approach is applicable to multi-input multi-output, unstable and non-minimum-phase plants, as long as a suitable analog controller exists. As far as the author of this thesis is aware, such generality is not available with other existing methods.
Since discrete-time models of continuous-time transfer functions play an important role in the proposed approach, a new characterization of these models is also present in this thesis.
38
Sangoi, Tânia Losekann. "ARTES VISUAIS E TECNOLOGIAS DIGITAIS NA FORMAÇÃO CONTINUADA DOS PROFISSIONAIS DE ENSINO MÉDIO." Universidade Federal de Santa Maria, 2006. http://repositorio.ufsm.br/handle/1/7252.
Abstract:
The present research is part of the line of Research Education and Arts of the Pos
Graduation Program in Education. The objective of this study is to reflect Art theory
practice, and the Continued Formation of teachers of Secondary School, having
present the educative processuality in the teaching of Visual Arts face to Digital
Technologies. The interest for the subject appeared through the perception of the
inexistence of a work in Art and the Digital Technologies, explicit requirement of the
contemporary education. In the search of a better agreement and understanding of
the questions that involve the subject, the theoretical basis was marked out with the
thought of Pierre Lévy (1993 and 1996), Diana Domingues (2003), Edmond Couchot
(1998 and 2003), Luiz Paulo Leopoldo Mercado (1999), Suzete Venturelli (2004),
Maria Beatriz de Medeiros (2005), Tânia Esperon Maria Porto (2003), Ana Luiza
Ruschel Nunes (2004), Ana Mae Barbosa (2002), Lucimar Bello Frange (2002),
Lucia Santaella (2002), and others mentioned in the body of the dissertation. The
approach of the research is qualitative through a study of case. The instruments of
data collection consisted of questionnaire and half-structuralized intervenes of the
participant observation of the daily field, the documentary analysis, the portfolio and
the practice of the digital technologies, forming a data set of which significant and
rewarding information had emerged. The research was developed at the State
School of Basic Education Margarida Lopes , at Gonçalves Ledo street number
565 Camobi Santa Maria/RS . They had been part of the same research, two
teachers of Visual Arts, attend in this Light School. The importance of the update of a
continuous formation was the object of the investigation with the citizens, therefore as
a mediating agent of the contemporary educational process involved in a permanent
process of participative investigation, reflexive and contextualized in Art Education.
Through the reflection of the teaching of Art and the continued formation, specified in
this case by means of digital technologies, it is possible to (re)concept,
contextualizing subjects, methods and methodology face educative practices. Being
in possession of the collected data we made the analysis with crossing information
that made possible beyond some interpretations, mainly the motivation of a reflexive
practice and the incorporation of the continued formation process to the Visual Arts
teachers. Though out the research we perceived that the Visual Arts knowledge, in
the contemporary context in the researched School has been worked by
descontextualized form, stagnated in Modern Art. In this way we can infer that the
reflections process inexisted by the misinformation of the knout edges of the Art and its history, therefore by the lack of the process of continued formation. The lack of
this process and the search of actualization were tenuous occurring in the frequency
in no specific courses and some readings. We conclude that the use of digital
technology in the teaching of Art didn t happen. We infer that the way for new and
possible changes of the teacher s look to their professional performance in the Visual
Arts teaching is without doubt the search for continued formation realignmenting to
new perspectives face Visual Arts and digital technology. We also infer that
Educative Visual Arts practice were permanently developed in the shared process,
having present the reflection in the action on the action and on the reflection from the
teachers and the School s context giving the visibility to formative process in the
perspective of the teaching of contemporary Art plugging to Digital Art and claiming
others possibilities of presupposed and a process of creation in the continued
formation of teachers.A presente pesquisa faz parte da Linha de Pesquisa Educação e Artes, do programa de Pós-Graduação em Educação.O objetivo deste estudo é refletir teorias e práticas da Arte e a Formação Continuada de Professores do Ensino Médio, tendo presente a processualidade educativa no Ensino de Artes Visuais frente às Tecnologias Digitais. O interesse pelo tema surgiu através da percepção da inexistência de um trabalho em Arte e as Tecnologias Digitais, exigência explícita da educação contemporânea. Na busca de um melhor entendimento e compreensão das questões que envolvem o tema, o fundamento teórico foi balizado no pensamento de Pierre Lévy (1993 e 1996), Diana Domingues (2003), Edmond Couchot (1998 e 2003), Luiz Paulo Leopoldo Mercado (1999), Suzete Venturelli (2004), Maria Beatriz de Medeiros (2005), Tânia Maria Esperon Porto (2003), Ana Luiza Ruschel Nunes (2004), Ana Mae Barbosa (2002), Lucimar Bello Frange (2002), Lucia Santaella (2002), e outros mencionados no corpo da dissertação. A abordagem da pesquisa é qualitativa, através de um Estudo de Caso. Os instrumentos de coleta de dados constituíram-se do questionário e entrevistas semi-estruturadas, da observação participante, do diário de campo, da análise documental, do portfólio e da prática com as tecnologias digitais, formando um conjunto de dados emergindo informações pertinentes a pesquisa. O espaço da pesquisa foi a Escola Estadual de Educação Básica Professora Margarida Lopes, localizada à Rua Gonçalves Ledo, 565, bairro Camobi, na cidade de Santa Maria/RS. Fizeram parte da mesma, duas professoras de Artes Visuais, atuantes no Ensino Médio da Escola. A importância da atualização, de uma formação contínua foi o objeto da investigação com os sujeitos, pois como profissionais mediadores do processo educacional contemporâneo envolvidos em um processo permanente de investigação participativa, reflexiva e contextualizada da arte-educação. Através da reflexão sobre o ensino da arte e da formação continuada, especificada nesse caso, por meio das tecnologias digitais, é possível (re)conceituar, contextualizando conteúdos, métodos e metodologia, frente às práticas educativas. De posse dos dados coletados, realizou-se a análise com o cruzamento das informações que possibilitaram, além de algumas interpretações, principalmente a motivação a uma prática reflexiva e a incorporação no processo de formação continuada para os professores de Artes Visuais. Ao longo da pesquisa percebeu-se que os conhecimentos de Arte Visuais, no contexto contemporâneo da escola pesquisada, vêm sendo trabalhados de forma descontextualizada, estagnados na Arte Moderna. Neste sentido, pode-se inferir que o processo de reflexão inexistia pelo desconhecimento dos saberes da Arte e sua História, portanto, pela falta de processos de formação continuada. A falta destes processos e a busca de atualização eram tênues, ocorrendo na freqüência em cursos, não específicos, e algumas leituras. Conclui-se que a utilização de tecnologia digital no ensino da arte não acontecia. Infere-se que o caminho para novos e possíveis mudanças do olhar do professor para sua atuação profissional no Ensino de Artes Visuais é sem dúvida a busca da Formação Continuada, realimentando para novas perspectivas frente às Artes Visuais e a Tecnologias Digitais. Infere-se também que as práticas educativas em Artes Visuais foi permanentemente desenvolvidas no processo compartilhado, tendo presente a reflexão na ação, sobre a ação e sobre a reflexão na ação, a partir do contexto dos professores e da escola, dando visibilidade a processos formativos na perspectiva do Ensino da Arte contemporânea conectando a arte digital, e exigindo outras possibilidades de pressupostos e processos de criação na Formação Continuada de professores.
39
Awuah, E. B. "The feasibility of Taylor series methods on digital continuous systems described as networks of interconnected boxes." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374696.
40
Pozos, Pérez Katia V. "Evaluación de necesidades de formación continua en competencia digital del profesorado universitario mexicano para la sociedad del conocimiento." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/382466.
Abstract:
Esta investigación se llevó a cabo entre 2010 hasta 2015, con el objetivo último de contribuir a la mejora de las prácticas educativas, docentes creencias y conocimientos profesionales en la educación superior, sobre la base de una propuesta para integrar la competencia digital en un modelo de desarrollo profesional del profesorado en/para la Sociedad del Conocimiento (KS). La idea principal de esta investigación radica principalmente en el empoderamiento de los profesores de educación superior con el fin de integrarse en la sociedad actual, y los frutos de esta investigación deben servir para la mejora de las funciones actuales y futuras de los maestros en la KS. Sobre la base de lo anterior, el estudio consiste en un análisis en profundidad de las necesidades de formación del profesorado de educación superior mexicano para elaborar propuestas orientadas a la satisfacción de las necesidades de capacitación, inicialmente a través de un programa de formación a medida para los maestros mexicanos, y, posteriormente, a través de la propuesta de estrategias de intervención necesarias para cumplir con las condiciones mínimas para llevar a cabo la formación en competencias digitales e integrar las nuevas tecnologías de manera adecuada en la práctica docente.
Se diseñó un estudio mixto, de tipo transformador-concurrente (QUAN + QUAL), en la que ambos enfoques metodológicos tienen la misma relevancia en el estudio; la recopilación de todos los datos fue planeada para llevarse a cabo al mismo tiempo. En la primera etapa de la investigación, se diseñó un estudio descriptivo, que proporciona sentido a toda la investigación, y que constituye la base teórico-práctica de las siguientes etapas de la investigación. Durante la segunda fase, también apoyado en un método mixto –empleando instrumentos y técnicas cuantitativas y cualitativas- se diseñó y desarrolló un estudio de evaluación de necesidades, del que se deriva la tercera y última fase: a partir de los resultados alcanzados, se obtienen datos para planificar programas de formación. El nivel de comprensión de la materia de la investigación reside en un caso de estudio, representada por los profesores de educación superior de universidades públicas y privadas mexicanas, especialmente en el Área Metropolitana de la Ciudad de México.
La muestra del estudio es mixta, basada en la combinación de la probabilidad y el muestreo proposicional (QUAN + QUAL). Esta estrategia de muestreo nos permitió, no sólo confirmar generalizaciones a esta población específica, sino también obtener un equilibrio entre "la saturación de las categorías" y "representatividad". 38 instituciones invitadas fueron invitadas a participar en el estudio, de las cuales participaron un total de 21 -11 de tipo público y 10 de tipo privado-, con la participación de 247 profesores de educación superior.
La metodología del estudio implica analizar la realidad educativa y social teniendo en cuenta diferentes perspectivas y técnicas de investigación, tales como la observación participante de los maestros en acción; la encuesta de autoevaluación de la competencia digital docente; la entrevista en profundidad, así como el desarrollo de grupos de discusión con profesores, coordinadores de formación, gestores institucionales y el investigador. Este conjunto de herramientas de investigación fueron elegidas con el fin de adquirir una comprensión integral y profunda de las necesidades de formación de los maestros mexicanos con respecto a su competencia digital.This research was carried out between 2010-2015 with the ultimate goal of contributing to the improvement of the educational practices, teachers’ beliefs and professional knowledge in higher education, on the basis of a proposal to integrate digital competence into a model of teachers’ professional development in/for the Knowledge Society (KS). The idea at the heart of this research lies mainly on the empowerment of higher education teachers in order to be integrated in the current society, and the fruits of this research should serve in the improvement of the current and new roles of teachers in the KS. On the basis of the above, the study consists of an in-depth analysis of training needs of Mexican higher education teachers to draw up proposals aimed at the satisfaction of training needs, initially through a tailored training program for Mexican teachers, and subsequently, through the proposal of intervention strategies needed to meet the minimum conditions to carry out the training on digital competence and to integrate new technologies adequately in the teaching practice. It was designed a mixed study, of type transformative - concurrent (QUAN + QUAL), in which both methodological approaches have the same relevance in the study; the collection of all data was planned to be undertaken at the same time, that is the reason why it is concurrent. In the first stage of the research, a descriptive study was designed, giving firm foundation and meaning to the entire investigation, which formed the basis theoretical-practical of the next research stages. During the second and third stages, a training needs assessment study was designed, leaning heavily, as mentioned above, in a mixed method (with instruments and techniques both quantitative and qualitative), from which its results would become in the first phase of the Planning of Training Programs. The level of understanding of the subject of investigation resides in a study case, represented by Mexican higher education teachers from public and private universities, specifically in the Metropolitan Area of Mexico City. Sample The sample of the study is consequently mixed, based on the combination of probability and propositional sampling (QUAN + QUAL). This sampling strategy allowed us not only to stablish generalizations to this specific population, but to have a balance between “categories saturation” and “representativeness”. Finally, from the 38 invited institutions, it was achieved a total of 21 universities, 11 of public type and 10 of private type, with the participation of 247 higher education teachers. Instruments This methodology posed to us the need to analyze the educational and social reality taking into account different perspectives and research techniques, such as participant observation of teachers in action (in face to face, blended and virtual programs); a self-assessment survey of teacher training needs in digital competence; in-depth interviews, as well as diverse focus Groups with teachers, training coordinators, institutional managers and the researcher.
41
Antonsson, Johan, Lisa Haack, and Johan Paulsson. "Revisionens digitala transformering ställer nya krav på utförandet." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-66008.
Abstract:
Sammanfattning Titel: Revisionens digitala transformering ställer nya krav på utförandet Författare: Johan Antonsson, Lisa Haack och Johan Paulsson Program: Ekonomprogrammet - inriktning redovisning och ekonomistyrning Handledare: Petter Boye Institution: Ekonomihögskolan på Linnéuniversitetet i Kalmar Inledning: I många år har digitaliseringen tagit allt mer plats i samhället, både hos individen men även företagen. Arbetsmarknaden har förändrats då arbeten försvunnit, men även nya uppkommit. Inom revisionsbranschen används nya affärssystem som ska underlätta för revisorn och därmed öka produktiviteten i arbetet. De nya affärssystemen kommer dock även med risker, de kan vara svårförståeliga, tidskrävande eller öppna upp för informationsstöld. Syfte: Syftet med uppsatsen är att förklara hur digitaliseringen har påverkat arbetsmetodiken och på så vis hur riskerna inom revisionen förändrats. Vår förhoppning är att resultatet ska leda till att revisionsbranschen och revisionens intressenter får en ökad förståelse för ämnet. Metod: Vi har använt en abduktiv ansats för att kunna öka förståelse för vårt ämne. För att kunna fördjupa oss i ämnet användes en kvalitativ metod där yrkessamma revisorer intervjuades för att vi skulle kunna uppfylla studiens syfte. Det motiveras även varför vi använt just de källor vi valt samt kritik mot dem. Slutsats: Vi kom fram till att arbetsmetoden underlättas då nya analysverktyg hjälper revisorn i sitt vardagliga arbete. Det har lett fram till att revisionsriskerna sänkts då programmen kan stå för en stor del av arbetet och revisorn bara behöver lite manuell handpåläggning. Däremot förutsätter det att revisorn besitter en viss IT-kunskap för att revisionsriskerna ska säkerställas som minskade. Om IT-kunskapen inte finns förhöjs riskerna istället, vilket i framtiden kan bli ett mera aktuellt problem. Vi tror att kraven för att bli auktoriserad revisor kan komma behöva förändras.Abstract Title: The audit's digital transformation requires new demands on the execution Authors: Johan Antonsson, Lisa Haack and Johan Paulsson Program: Ekonomprogrammet - inriktning redovisning och ekonomistyrning Advisor: Petter Boye Institution: Ekonomihögskolan på Linnéuniversitetet i Kalmar Introduction: For several years digitalization has taken increasingly more room in the society, both for the individual and for the company. The labor market has changed because work has disappeared but new jobs have also been created. Within the accounting profession new ERP systems are being used to make the work easier for the auditor and thereby increase the productivity in the work. The new ERP systems comes with new risks, they can be hard to understand, time consuming or opening up avenues for information thefts. Purpose: The purpose of this essay is to explain how digitalization has impacted the work process of auditers and how the risks have changed in the auditing process. Method: We have used an abductive approach to be able to increase our understanding for the subject. To deepen our understanding of the subject we used a qualitative method where auditors were interviewed. We also discuss why we have chosen the sources we chose and critique against them. Conclusion: Our conclusion is that the work process has become easier due to new analyzing programs which helps the auditor in their daily work. This has led to a decrease in auditing risk because the programs can do a lot of the work and the auditor only need to do some of the manual work. However, this requires that the auditor possess some IT knowledge, otherwise the auditing risk can´t be ensured to be decreased. If the IT knowledge doesn´t exist the risks will increase instead, which in the future might become a more important problem. We believe that the qualifications required to become an authorized auditor may need to change for the future.
42
Campion, Monica. "Le metodologie narrative digitali nei contesti della formazione iniziale e continua degli educatori sociali." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423863.
Abstract:
The most recent studies give great credence to narrative methodologies in being able to develop learning and in implementing educational empowerment. Under this perspective, Storytelling, takes on the characteristics of a real active method, that aims to promote the development of meaning about experience, an analysis of this meaning and the educational implications that result.
The high potential of storytelling allows the experience to be known and understandable, even if this hasn't been lived in first person, and permits to broadcast it beyond the initial context in order to facilitate the repeatability, the development and the revision, and to promote the exchange of ideas in a reflective perspective.
Today, thanks to the low cost of digital devices and the availability of new media tools, the possibilities and methods of production and communication of stories are increasing. Therefore there is a complexification of the narrative process. The text (as a translation of narrative thinking in a narrative discourse) can assume different forms which correspond to different ways of using it. In addition to the monomedia tradition (oral and written form) we now also have the multimedia world. This powerful influence arose from the transition between Web 1.0 and 2.0, which caused a change in paradigm: today people have both the means to tell their stories and the channels to spread and share them with extreme ease and immediacy. The individual stories and the personal views of the world open up to enable comparisons that generate an interactive feedback process that changes in-depth the nature and the direction of the communication flow.
The person takes on an active role in the process of co-construction of knowledge and thus leaves behind the role of “simple user”. Typical examples included wiki and online blogs, but this need to share and tell through digital means has also generated the practice of "digital storytelling". Digital Storytelling is defined as «the modern expression of the ancient art of storytelling using digital media to create media-rich stories to tell, to share, and to preserve». The possibility of mixing two different worlds (the storytelling world with its processes of objectification and subjectification, and the “digital” world with its ability to integrate various languages and appeal to younger generations) makes it a powerful tool in an educational context.
Amplifying the power of the traditional narrative method, the technique of Digital Storytelling offers a methodological and in depth reflection for education practitioners, especially in relation to new horizons and contexts of communication and particularly for those who work with young people.I più recenti studi di area pedagogica danno estrema credibilità alle metodologie narrative, ritenendole in grado di sviluppare l'apprendimento e di implementare l’empowerment educativo. In questa prospettiva la narrazione assume le caratteristiche di un vero e proprio metodo attivo, che mira a promuovere la costruzione di significato circa l'esperienza, lo sviluppo di processi riflessivi a partire da questa consapevolezza e tutte le altre implicazioni educative che ne derivano. L’alto potenziale della narrazione consente di rendere nota e comprensibile l’esperienza anche a chi non l’ha vissuta, trasmettendola oltre i confini del contesto di partenza, sia per favorirne la ripetibilità, lo sviluppo e la rielaborazione, sia per favorire la circolazione di idee in prospettiva riflessiva. Oggi grazie al basso costo dei dispositivi digitali ed i nuovi supporti disponibili, le possibilità e le modalità di costruzione e comunicazione delle storie sono aumentate con conseguente complessificazione del processo narrativo: il testo, come traduzione del pensiero narrativo in un discorso narrativo, si presenta in forme diversificate alle quali corrispondono diverse modalità di produzione e di fruizione. Alla tradizionale modalità monomediale orale e scritta si affianca oggi, sempre più prepotentemente, quella multimediale. Un forte condizionamento in questo senso è derivato dal passaggio tra Web 1.0 e 2.0 che ha determinato, un vero e proprio cambio di paradigma per cui le persone oggi dispongono sia dei mezzi necessari per raccontare la propria storia sia dei canali per diffonderla e condividerla con estrema facilità ed immediatezza. Le narrazioni individuali, i propri punti di vista personali sul mondo si aprono così al confronto generando un processo interattivo e reciproco di feedback che modifica profondamente la natura e la direzione dei flussi comunicativi e porta la persona ad assumere un ruolo attivo nel processo di co-costruzione della conoscenza abbandonando quello di semplice fruitore. Esempi classici sono rappresentati da Wiki e blog ma questa esigenza di raccontare e raccontarsi attraverso il digitale ha generato anche la pratica del “digital storytelling”. Questo nuovo approccio metodologico consiste nell’usare media digitali per creare storie arricchite (“media-rich stories”) da raccontare, da condividere e preservare”. La potenzialità educativa di questo strumento sta nella possibilità che esso offre di coniugare due mondi fra loro diversi: da un lato quello della narrazione con la possibilità di innescare processi di oggettivazione e soggettivazione e, dall’altro, quello del digitale, dei muovi media, degli strumenti tecnologici innovativi, con la loro possibilità di integrare linguaggi diversi e di attrarre in particolare le nuove generazioni.
43
Padmanabhan, Ananth. "Continuous HMM connected digit recognition." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-01312009-063408/.
44
Brereton, Michelle Lorraine. "A national scheme using digital images of blood cell morphology to support continuous professional development : evaluating morphology reporting." Thesis, University of Portsmouth, 2017. https://researchportal.port.ac.uk/portal/en/theses/a-national-scheme-using-digital-images-of-blood-cell-morphology-to-support-continuous-professional-development(e7c90b23-7148-4b32-bafb-657b578c1708).html.
Abstract:
The reporting of blood cell morphology, by biomedical scientists using microscopy, is a subjective and relatively uncontrolled process; morphology reports impact directly upon the clinical care of patients, however, no large studies of the processes morphologists employ to reach their conclusions have been undertaken. This thesis chronicles the collaborative process with a national provider of quality assessment services (UK NEQAS(H)); detailing the pioneering developments that culminated in the creation of a national scheme, incorporating digital images of peripheral blood cells and accredited for continuous professional development. Annual exercises, using digital images distributed via the internet, were used to develop, test and create the scheme. Two workshops provided early assessment and feedback from participants. The aim of this research was to then evaluate the responses of the large number of professionals who completed cases, to give insights into how they interpret the blood cell morphology to produce their succinct report. The responses of between 732 and 1,018 participants (median 878) were examined for five digital morphology cases specifically selected to cover a range of morphological features. The subsequent data examination shows that patterns of error and bias were found in the responses that have not been described in blood film reporting before. Where a single morphological abnormality existed (glandular fever or Pelger-Huët anomaly), the ability to identify the feature of interest was high (97% and 84% respectively), however, errors in knowledge-based classification were seen. For complex cases, with multiple abnormal features, additional errors of inattention and premature completion were found; in the case of lymphoma with oxidative haemolysis 68% correctly reported the acute haemolysis, however, only 17% correctly reported both abnormal pathologies. Heuristic methods of decision-making, not considered in morphology reporting before, help the understanding of these patterns of error and bias. Following this research the national scheme will be adapted to support participants by indicating the potential common forms of error found in morphology reporting.
45
Curt, Jordan. "Damage detection for wind turbine towers with Digital Image Correlation." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPAST008.
Abstract:
La technologie des éoliennes est mature et le marché est avec le temps devenu compétitif. Un levier pour diminuer les coûts de l’exploitation des éoliennes réside dans l’optimisation de la maintenance des turbines. Dans ce contexte, cette étude se focalise sur l’état de la tour de l’éolienne. La durée de vie de la tour est influencée par des paramètres incertains liés à l’environnement et les aléas matériaux. Ceci rend très difficile la prédiction de la durée de vie d’un mât et des marges importantes sont prises lors de son dimensionnement. Cependant des éoliennes se sont déjà effondrées dans le monde, à chaque fois lors d'épisodes climatiques violents. Les deux phénomènes de ruine identifiés sont le flambement local de la tour et l'arrachement de sa partie supérieure. Des sources académiques ou industrielles ont également rapporté la découverte de fissures sur quelques turbines aux interfaces soudure-matériau. Une réflexion concernant la criticité d'une fissure vis à vis du flambement et de sa propagation brutale a été menée dans le cas où la tour est soumise à des chargements violents. Des simulations éléments finis ont permis de montrer que la propagation brutale de fissure était le phénomène dimensionnant pour la prolongation de durée de vie d'une tour d'éolienne fissurée.Pour s'assurer de l'intégrité des structures des techniques de suivi de santé ont été développées. Celles-ci sont en général réalisées à partir de capteurs extrapolant un état de santé global à partir de données locales (accéléromètres, jauges de déformations). Le risque est qu'un défaut reste invisible mais soit tout de même critique pour la structure. Il est donc essentiel de revisiter les outils de prédiction à partir de données de sites relatives à l’endommagement de la tour et des structures les supportant. Dans le cadre de ce travail de thèse des méthodes basées sur l'imagerie et plus particulièrement la Corrélation d'Images Numériques (CIN) ont été développées. Pour aborder le problème, deux approches à différentes échelles ont été considérées.La première, à l’échelle structurale, consiste à reconstruire le champ de déplacement de l'éolienne vue comme une structure unidimensionnelle. La présence d'un défaut induira une perte de raideur latérale, et donc une (quasi-)discontinuité dans le champ de rotation. Les défis relatifs à cette partie sont doubles : l'absence de contraste sur la tour et la prise de photos en extérieur sur une grande structure. Une technique de CIN intégrée a été utilisée afin de diminuer le nombre d'inconnues du problème et réduire les incertitudes de mesures. Il a été montré que l'influence d'un défaut, plus particulièrement d'une fissure, serait trop faible par rapport aux incertitudes de mesures. Cependant, suivant cette approche, une méthode innovante d'analyse modale de tour d'éolienne a été développée et les deux premières fréquences propres ont pu être déterminées avec précision.La seconde est une stratégie de contrôle de la structure à l'échelle mésoscopique. Celle-ci se base sur un dispositif de caméras bon marché à l'intérieur de l'éolienne couvrant les soudures circonférentielles au niveau des zones de plus fortes contraintes. L'idée est d'établir pour chaque caméra lorsque la structure est considérée comme saine une base modale de déplacement caractéristique de cet état grâce à des techniques de réduction de modèle. Au cours du temps, si un défaut sous-jacent ou traversant apparait, celui-ci induira une perturbation du champ de déplacement qui pourra être détectée à l'aide d'indicateurs globaux tels que l'écart en déplacement ou les résidus de corrélation.Afin de déterminer si la détection d'un défaut aux deux échelles est faisable ou non, la prise en compte de l'incertitude de mesure en regard de l'influence d'un défaut est primordiale. Alors, un cadre mathématique de la CIN optimale à N champs a été proposé et validéWind turbine technology is mature and the market has become very competitive over time. A lever to reduce the costs of wind turbine operation lies in optimizing turbine maintenance. In this context, this study focuses on the wind turbine tower. The lifetime of the tower is influenced by uncertain parameters related to the environment and material hazards. This makes it very difficult to predict the tower lifetime, and large safety factors are used when dimensioning it. However, around the world, a few wind turbines have already collapsed, each time during extreme climatic episodes. The two identified ruin causes are the local buckling of the tower and the tearing off of its upper part. Academic and industrial sources have also reported the discovery of cracks on some turbines at the weld-material interfaces. An investigation of the criticality of a crack with respect to buckling and its fatal propagation has been carried out in the case where the tower is subjected to violent loads. Finite element simulations showed that the fatal crack propagation was the limiting phenomenon for the life extension of a cracked wind turbine tower.To ensure structural integrity, health monitoring techniques were developed over time. These are generally carried out using sensors extrapolating a global state of health from local data (accelerometers, strain gauges). The risk is that a defect remains invisible but is nevertheless critical for the structure. It is therefore essential to revisit the prediction tools based on site data. Within the framework of this work, methods based on imagery and more particularly Digital Image Correlation (DIC) have been developed. To address the problem, two approaches at different scales have been considered.The first, at structural scale, consists in reconstructing the wind turbine displacement field considered as a one-dimensional structure. The presence of damage will induce a loss of lateral stiffness, and thus a (quasi-)discontinuity in the field of rotation. The challenges for this part are twofold: the lack of contrast on the tower and the capture of outdoor photographs on a large structure. An integrated DIC technique was used in order to reduce the number of unknowns in the problem and to lower the measurement uncertainties. It was shown that the influence of a damage, especially a crack, would be too small regarding the measurement uncertainties. However, an innovative method of wind turbine tower modal analysis was developed and the first two natural frequencies could be determined accurately.The second strategy is focused on a mesoscopic scale. It is based on a low-cost camera system, inside the wind turbine, covering the circumferential welds in the regions of highest stress. The idea is to establish for each camera, when the structure is considered sound, a displacement modal basis using model reduction techniques. Over time, if an underlying or through defect appears, it will induce a disturbance in the displacement field which can be detected using global indicators such as displacement deviation or DIC residuals.In order to determine whether the detection of damage at both scales is feasible or not, it is essential to take into account the measurement uncertainty. Therefore, a mathematical framework of the optimal CIN with N fields has been proposed and validated
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Laude, Emmanuelle. "Étude expérimentale et calcul des cinétiques de transformation de phase d'alliages de titane -métastables en fonction des traitements thermomécaniques." Vandoeuvre-les-Nancy, INPL, 1997. http://docnum.univ-lorraine.fr/public/INPL_T_1997_LAUDE_E.pdf.
Abstract:
La transformation de phase Béta->Alpha a été étudiée pour l'alliage Beta-Cez sous conditions isothermes ou anisothermes. Dans le domaine des températures supérieures à 750°C, les variations de résistivité électrique permettent d'estimer de manière fiable les cinétiques de transformation de phase. Par contre, pour des températures comprises entre 700 et 600°C, seule une méthode discontinue permet d'estimer ces cinétiques. Dans le domaine des températures supérieures à 750°C, l'application d'une déformation préalable a pour effet d'accélérer la cinétique de transformation de phase par le biais de la vitesse de germination de la phase AlphaGB. L'influence de la déformation est importante lorsque celle-ci conduit à une accélération de la saturation des sites de germination que sont les joints de grain, voire les sous-joints. La croissance de la phase AlphaWGB n'est pas affectée. À des températures plus basses, pour lesquelles la saturation des sites est rapide même sans déformation, la déformation ne modifie pas la cinétique globale de formation de (AlphaGB + AlphaWGB). Elle conduit à une accélération de la cinétique de germination de la phase AlphaWI. D'autre part, l'analyse de la formation des phases AlphaGB, AlphaWGB et AlphaWI, a permis de développer un modèle de prévision de l'évolution des différentes morphologies apparaissant au cours d'un refroidissement continu. Le modèle établi est basé sur la notion d'additivité de l'incubation et de la croissance pour chaque type de transformation. Ce principe permet de calculer l'évolution de la cinétique au cours d'un refroidissement continu à partir des cinétiques isothermes, celles-ci suivant une loi différentielle de type Johnson-Mehl-Avrami. Les prévisions par le calcul des taux de (AlphaGB + AlphaWGB) et AlphaWI au cours d'un refroidissement continu, sont comparées aux valeurs expérimentales de ces taux dans le cas de transformation sans déformation préalable, pour l'alliage Beta-Cez et l'alliage 10. 2. 3.
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Gao, Lingjun. "In-line continuous measurement of the size distribution of pneumatically conveyed particles using piezoelectric sensing and digital imaging techniques." Thesis, University of Kent, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596074.
Abstract:
Gas-solid two-phase flows are widely seen in many industrial processes. A good example of these is the pneumatically conveyed pulverised fuel (coal/biomass) flow in the power generation industry. In order to achieve efficient operation of a power plant it is desirable to monitor the physical characteristics of fuel particles. As one of the most important characteristics, particle size distribution should be monitored to increase combustion efficiency, to minimise pollutant emissions, and to reduce milling cost. This thesis describes the design, implementation and experimental evaluation of two prototype instrumentation systems for in-line, continuous size measurement of pneumatically conveyed particles. A review of methodologies and techno logies for the in-line measurement of particle size distribution is given, together with the discussions of existing problems and technical requirements in their applications. Based on this review, a particle impact sensing system using a piezoelectric film sensor incorporating particle impact modelling and signal processing algorithms is proposed. Experimental results obtained on a laboratory test rig demonstrate that the system is capable of measuring particle size distribution and can be used to provide an assessment of flow characteristics wider various flow conditions. The system also demonstrates that this technology is practical and operational on a full-scale power plant. Additionally, the thesis also reports the latest development in particle imaging technology. A novel particle imaging system using multi-wavelength illumination sources is designed and implemented. Experimental results on a laboratory-scale rig show that the multi-wavelength design has increased the coverage of flow field and improved the system repeatability compared to the single-wavelength system. Finally, the particle impact sensing system and particle imaging system have their own advantages and limitations and both require further research. The work reported in this thesis offers a foundation for future in-line measurement of particle size distribution and demonstrates the potential of the proposed techniques.
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PATEL, VIPUL J. "BEHAVIORAL SIMULATION AND SYNTHESIS ENVIRONMENT FOR CONTINUOUS-TIME SINGLE-LOOP SINGLE-BIT BASEBAND DELTA-SIGMA ANALOG-TO-DIGITAL MODULATORS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1147473065.
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Luo, Yuanyuan. "Synthesis and Characterization of Poly(Propylene Fumarate) Oligomers via a Chain-Growth Mechanism for Continuous Digital Light Processing (CDLP)." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427910816.
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Noriega, del Castillo Marcelo. "Implementación de un sistema de control digital de la velocidad de un motor DC utilizando redes inalámbricas." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2011. http://tesis.pucp.edu.pe/repositorio/handle/123456789/991.
Abstract:
El uso de la tecnología inalámbrica para los diferentes sistemas de transmisión de información ha crecido enormemente en los últimos años.
El presente trabajo tiene como objetivo integrar la tecnología inalámbrica con el control automático de los procesos industriales, de manera tal que el controlador de un proceso se comunique en tiempo real con los sensores y actuadores mediante una red inalámbrica.
Esta integración permitirá que los sistemas de automatización posean una amplia flexibilidad, con ventajas respecto a las redes cableadas, tales como la disminución de los costos del diseño, implementación y mantenimiento de la red cableada; asimismo se disminuye también la cantidad de paradas – hora en las industrias, debido a que estos sistemas inalámbricos pueden prescindir del uso de dispositivos eléctricos de interconexión que son las causas principales de este tipo de problemas.
En la primera etapa se identificó la función de transferencia del proceso a controlar, basado en modelos matemáticos y se realizaron las simulaciones correspondientes que permitieron determinar el tiempo de muestreo y la sintonización PID del controlador.
Luego se implementó la red inalámbrica ya diseñada por el alumno Alonso Henry Gómez Zevallos en su tesis “Diseño e implementación de una red inalámbrica para un proceso industrial utilizando protocolo Modbus” , que permitió la comunicación entre el controlador del proceso (computador) con el sensor y el actuador. Posteriormente se implementó el algoritmo de control en el lenguaje de programación Visual Basic 6.0 y se usó la tecnología de comunicación entre procesos patentada por Microsoft ODBC (Open Database Connection) y el control ADO (Active Data Objects) para la transferencia de información entre el lenguaje de programación y el software SCADA. Finalmente se incluyó un código adicional en el Visual Basic que permitió mostrar una curva de tendencias del comportamiento del proceso a lo largo del tiempo.Tesis