Dissertations / Theses: 'Digital Resilience'

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Zelenko, Oksana. "Resilience by design: A participatory approach to designing an interactive digital application for promoting children's resilience." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/54768/3/Oksana_Zelenko_Thesis.pdf.

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The promotion of resilience (the capacity of an individual or community to bounce back and recover from adversity) has become an important area of public health. In recent years it has expanded into the digital domain, and many online applications have been developed to promote children's resilience. In this study, it is argued that the majority of existing applications are limited because they take a didactic approach, and conceive of interaction as providing navigational choices. Because they simply provide information about resilience or replicate offline, scenario-based strategies, the understanding of resilience they provide is confined to a few, predetermined factors. In this study I propose a new, experiential approach to promoting resilience digitally. I define resilience as an emergent, situated and context-specific phenomenon. Using a Participatory Design model in combination with a salutogenic (strength-based) health methodology, this project has involved approximately 50 children as co-designers and co-researchers over two years. The children have contributed to the design of a new set of interactive resilience tools, which facilitate resilience promotion through dialogic and experiential learning. The major outcomes of this study include a new methodology for developing digital resilience tools, a new set of tools that have been developed and evaluated in collaboration with children and a set of design principles to guide future development. Beyond these initial and tangible outcomes, this study has also established that the benefits of introducing Participatory Design into a health promoting model rests primarily in the change of the role of children from "users" of technology and education to co-designers, where they assume a leadership role in both designing the tools and in directing their resilience learning.

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Natu, Ambarish Shrikrishna Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Error resilience in JPEG2000." Awarded by:University of New South Wales. Electrical Engineering and Telecommunications, 2003. http://handle.unsw.edu.au/1959.4/18835.

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The rapid growth of wireless communication and widespread access to information has resulted in a strong demand for robust transmission of compressed images over wireless channels. The challenge of robust transmission is to protect the compressed image data against loss, in such a way as to maximize the received image quality. This thesis addresses this problem and provides an investigation of a forward error correction (FEC) technique that has been evaluated in the context of the emerging JPEG2000 standard. Not much effort has been made in the JPEG2000 project regarding error resilience. The only techniques standardized are based on insertion of marker codes in the code-stream, which may be used to restore high-level synchronization between the decoder and the code-stream. This helps to localize error and prevent it from propagating through the entire code-stream. Once synchronization is achieved, additional tools aim to exploit as much of the remaining data as possible. Although these techniques help, they cannot recover lost data. FEC adds redundancy into the bit-stream, in exchange for increased robustness to errors. We investigate unequal protection schemes for JPEG2000 by applying different levels of protection to different quality layers in the code-stream. More particularly, the results reported in this thesis provide guidance concerning the selection of JPEG2000 coding parameters and appropriate combinations of Reed-Solomon (RS) codes for typical wireless bit error rates. We find that unequal protection schemes together with the use of resynchronization makers and some additional tools can significantly improve the image quality in deteriorating channel conditions. The proposed channel coding scheme is easily incorporated into the existing JPEG2000 code-stream structure and experimental results clearly demonstrate the viability of our approach

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Cerovic, Lazar. "Identifying Resilience Against Social Engineering Attacks." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280131.

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Social engineering (SE) attacks are one of the most common cyber attacks and frauds, which causes a large economical destruction to individuals, companies and governments alike. The attacks are hard to protect from, since SE-attacks is based on exploiting human weaknesses. The goal of this study is to identify indicators of resilience against SE-attacks from individual computer space data, such as network settings, social media profiles, web browsing behaviour and more. This study is based on qualitative methods to collect information, analyse and evaluate data. Resilience is evaluated with models such as theory of planned behaviour and the big five personality traits, as well as personal and demographic information. Indicators of resilience were found in network settings such as service set identifiers (SSID) and routers, web history, social media use and more. The framework developed in this study could be expanded with more aspect of individual data and different evaluation criteria. Further studies can be done about this subject with tools such as artificial intelligence and machine learning.
Sociala manipulationer är bland de vanligaste cyber attackerna och bedrägerierna som orsakar enorma ekonomiska skador varje år för individer, företag och myndigheter. Dessa attacker är svåra att skydda ifrån då sociala manipulationer utnyttjar mänskliga svagheter som ett medel till att stjäla pengar eller information. Målet med studien är att identifiera indikatorer av motstånd mot sociala manipulationsattacker, vilket ska göras med hjälp av individuell data, som kan bestå av nätverksinställningar, sociala medieprofiler, webbaktivitet bland annat. Denna studie är baserat på kvalitativa metoder för att samla, analysera och utvärdera data. Motstånd mot social manipulation utvärderas med hjälp av relevanta teorier och modeller som har med beteende och personligheter att göra, sedan används även personlig och demografisk information i utvärderingen. De indikatorer som identifierades var bland annat inställningar i routrar, webbhistorik och social medianvändning. Det teoretiska ramverket som utvecklades för att utvärdera motstånd mot sociala manipulationsattacker kan utökas med fler aspekter av individuell data. Viktiga samhällshändelser och sammanhang kan vara en intressant faktor som är relaterat till ämnet. Framtida studier skulle kunna kombinera detta ramverk med tekniker som maskinlärning och artificiell intelligens.

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Becker, Sophia Colette. ""Performance and Resilience: Performance, Storytelling, and Resilience Building in Post-Katrina New Orleans"." Oberlin College Honors Theses / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1472833968.

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MEYER, DANIEL. "Resilient Supply Chains : A Framework to Position Vendor Managed Inventory Digital Solutions and Enhance Resilience of Supply Chains After Disruptions." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284539.

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We live in an era where markets are more dynamic and the product life cycle is shorter, an era where concepts such as smart manufacturing and mass customization form part of daily life in industries and where consumption rates of products and services are rising. All these result in more dynamic, global, complex and fragile supply chains. Disruptions are negative impacts on business continuity in companies and when a supply chain is disrupted there is only one way to tackle the challenges originated and is the ability to be resilient. Based on a systematic literature review, this thesis lay out a framework to position Vendor Managed Inventory digital solutions in order to provide full visibility in the supply chains, and enhance agility and flexibility skill sets in the organizations to be resilient after massive disruptions such as the COVID-19. The conclusions of this work provide a positive outlook of the capabilities of VMI solutions to create more resilient supply chains.
Vi lever i en era där marknader är mer dynamiska och produkters livscykel kortare. En era där koncept som smart tillverkning och mass-anpassning är en del av dagliga livet i industrier och där konsumtionsnivåer av produkter och tjänster ökar. Allt detta resulterar i mer dynamiska, globala, komplexa och känsliga försörjningskedjor. Störningar påverkar kontinuiteten i verksamheten negativt hos företag och när en försörjningskedja påverkas av störningar finns det bara ett sätt att hantera utmaningarna som uppstår och det är genom förmågan att vara motståndskraftig. Baserad på systematisk litteratursökning, lägger denna avhandling fram ramverk för att positionera Vendor Managed Inventory digitala lösningar för att förse full synlighet i distributionskedjan och förbättra rörlighetens och flexibilitetens förmågor i organisationerna för att bli mera uthållig efter massiva störningar som COVID-19. Slutsatserna av detta arbete ger en positiv syn på möjligheterna för VMI-lösningar för att skapa mer motståndskraftiga försörjningskedjor.

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Vicari, Rosa. "Digital traces of climate risks : assessing the communication impact of Paris resilience strategy." Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC1168.

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Les pressions climatiques contribuent à la complexité des systèmes urbains, qui sont dotés de multiples fonctions et composantes en interaction. Le concept de résilience introduit une approche holistique qui englobe les composantes physico-environnementales et les composantes socioéconomiques de la ville. Cette thèse contribue au besoin actuel de forger ce lien dans l’étude des risques urbains liés aux aléas du climat. En particulier, la thèse tente de répondre à la question suivante : comment évaluer l’impact des discours sociaux sur la résilience urbaine?L’approche de la résilience consiste à surmonter la fragmentation dans la gestion des risques, en créant des synergies entre les acteurs. C’est un défi qui souligne l’importance de la "construction sociale de la réalité" : une dimension spécifique de la ville, qui correspond aux perceptions et aux attitudes de la communauté urbaine vis-à-vis d’un problème ou d’une solution. La définition d’indicateurs de communication pertinents permettrait de recueillir des données significatives sur ces perceptions et d’évaluer de leur impact sur la résilience.À partir de ces prémisses, cette thèse développe de nouveaux indicateurs de communication. Ces indicateurs ont été conçus et testés en région parisienne pour étudier les processus de communication qui caractérisent les stratégies locales de résilience aux risques climatiques.La première partie de cette étude s’articule autour des actions de communication mises en œuvre à Paris par les autorités locales, nationales et internationales, dans le cadre de stratégies de résilience aux inondations. Des variables de communication récurrentes et significatives ont été identifiées et utilisées pour définir des indicateurs de communication.Certains de ces indicateurs ont ensuite été testés. Dans une première série d’expériences, nous avons fait recours à des méthodes de recherche habituellement adoptées dans le domaine du SIA (Social Impact Assessment). Des techniques d’exploration de big data non structurés (text-mining avancé et représentation de réseaux complexes) ont été employées dans une deuxième série d’expérimentations.Les expériences d’évaluation de type SIA (veille médiatique, un questionnaire et des entretiens) ont été menées dans le cadre de la stratégie de communication de Interreg NWE IVB RainGain, un projet européen sur la résilience aux inondations en milieu urbain.L’impact de la communication a été analysé en termes quantitatifs (fréquence des actions de communication et audience) et qualitatifs (transfert de connaissances et de réduction de la perception du risque). L’évolution temporelle des impacts et la corrélation avec un autre facteur de résilience (météo) ont été également examinées.Les expériences basées sur le text-mining et la représentation de réseaux ont permis d’analyser les réseaux sociosémantiques qui sous-tendent les communications numériques.Quatre corpus de textes ont été extraits du Web : tweet et articles de presse concernant la crue de la Seine de 2016 et les inondations dans les Alpes-Maritimes de 2015; des documents institutionnels sur la gestion du risque de crue en région parisienne, publiés entre 2003 et 2017.L’analyse de ces corpus a été réalisée à l’aide de logiciels open source (Gargantext, Gephi), à travers plusieurs étapes : extraction de centaines de mots clés; représentations de réseaux à partir des cooccurrences de mots clés; visualisation de clusters basée sur une matrice d’adjacence; analyse quantitative des nœuds et des arêtes. Ceci a permis de détecter les thématiques et les acteurs les plus centraux, ainsi que les connexions fréquentes et les communautés de thématiques et acteurs qui caractérisent les discours médiatique et politique.En comparant les quatre corpus, il a été possible d’observer comment ces structures évoluent dans le contexte de deux événements météorologiques distincts, dans le court terme et dans le long terme
Climate pressures contribute to the complexity of urban systems that have multiple functions and interacting components. The concept of resilience introduces a holistic approach, embracing both the physical environmental and the socio-economic components of cities. This thesis contributes to the current need to forge this link when studying climate-related risks in urban areas. More specifically, it attempts to answer the question: how can we assess the impact of communication on urban resilience?‘Resilience thinking’ involves overcoming fragmentation in risk management, by creating synergies among stakeholders. It is a challenge that illustrates the importance of the ‘social construction of reality’: a specific dimension of the city that corresponds to the perceptions and attitudes of the urban community regarding an issue or solution. Identifying relevant communication indicators is a prerequisite to collecting meaningful data on stakeholder views and evaluating their impact on resilience.With these premises in mind, the thesis proposes new communication indicators. These indicators have been created and tested in the context of the Paris region to investigate the communication processes that underlie local climate resilience strategies.The first part of this study revolves around the communication actions implemented in Paris by local, national and international authorities in the framework of flood resilience strategies. Recurrent and relevant communication variables have been identified and used as a basis to outline communication indicators.Some of these indicators have then been tested. A first series of experiments are based on research methods that are usually adopted by SIA (Social Impact Assessment) experts. Exploration techniques of unstructured big data (advanced text mining and complex network representation) have been used for a second set of experiments.The experiments based on SIA techniques (press coverage monitoring, a questionnaire and interviews) have been carried out in the framework of the communication strategy of Interreg NWE IVB RainGain, a European project on urban flood resilience.Communication impact has been evaluated in both quantitative (frequency of communication activities and audience size) and qualitative terms (knowledge transfer and risk perception reduction). Impact evolution over time and correlations with another resilience driver (weather hazards) have been also addressed.The experiments based on text mining and network representation have resulted into an analysis of the socio-semantic networks that underlie digital communications.Four corpora of texts have been extracted from the Web: tweets and press news covering the Seine River flood of 2016 and the Alpes-Maritimes flood of 2015; public authorities’ documents on flood risk management in the Paris region, released from 2003 to 2017.The analysis of the corpora was supported by open source software (Gargantext and Gephi) and it has involved several steps: extraction of hundreds of key terms; network representations based on key term co-occurrences; cluster visualisation based on adjacency matrix; quantitative analysis of the nodes and edges. This has allowed appraising the most prominent topics and actors, as well as frequent connections and clusters of topics and actors that characterise the media and political debates.Through a comparison of the four corpora, it has been possible to observe ho these patterns change in the context of two different extreme weather events, in the short-term and in the long-term

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Romine, Jessica D. "Business Continuity and Resilience Engineering: How Organizations Prepare to Survive Disruptions to Vital Digital Infrastructure." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1330986438.

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Zhang, Jian Electrical Engineering Australian Defence Force Academy UNSW. "Error resilience for video coding services over packet-based networks." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Electrical Engineering, 1999. http://handle.unsw.edu.au/1959.4/38652.

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Error resilience is an important issue when coded video data is transmitted over wired and wireless networks. Errors can be introduced by network congestion, mis-routing and channel noise. These transmission errors can result in bit errors being introduced into the transmitted data or packets of data being completely lost. Consequently, the quality of the decoded video is degraded significantly. This thesis describes new techniques for minimising this degradation. To verify video error resilience tools, it is first necessary to consider the methods used to carry out experimental measurements. For most audio-visual services, streams of both audio and video data need to be simultaneously transmitted on a single channel. The inclusion of the impact of multiplexing schemes, such as MPEG 2 Systems, in error resilience studies is also an important consideration. It is shown that error resilience measurements including the effect of the Systems Layer differ significantly from those based only on the Video Layer. Two major issues of error resilience are investigated within this thesis. They are resynchronisation after error detection and error concealment. Results for resynchronisation using small slices, adaptive slice sizes and macroblock resynchronisation schemes are provided. These measurements show that the macroblock resynchronisation scheme achieves the best performance although it is not included in MPEG2 standard. The performance of the adaptive slice size scheme, however, is similar to that of the macroblock resynchronisation scheme. This approach is compatible with the MPEG 2 standard. The most important contribution of this thesis is a new concealment technique, namely, Decoder Motion Vector Estimation (DMVE). The decoded video quality can be improved significantly with this technique. Basically, this technique utilises the temporal redundancy between the current and the previous frames, and the correlation between lost macroblocks and their surrounding pixels. Therefore, motion estimation can be applied again to search in the previous picture for a match to those lost macroblocks. The process is similar to that the encoder performs, but it is in the decoder. The integration of techniques such as DMVE with small slices, or adaptive slice sizes or macroblock resynchronisation is also evaluated. This provides an overview of the performance produced by individual techniques compared to the combined techniques. Results show that high performance can be achieved by integrating DMVE with an effective resynchronisation scheme, even at a high cell loss rates. The results of this thesis demonstrate clearly that the MPEG 2 standard is capable of providing a high level of error resilience, even in the presence of high loss. The key to this performance is appropriate tuning of encoders and effective concealment in decoders.

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Kamalpour, Mostafa. "How does the resilience of older adults emerge in online communities." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/233885/1/Mostafa_Kamalpour_Thesis.pdf.

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Resilience is an important element for the wellbeing of older adults. This study investigated how the resilience process among older adults emerges in online communities. Through analysing the Reddit online forum, and performing interviews with older adults, this work proposed a digital resilience model explaining different stages of the resilience process in online communities. Findings showed that in OCs, the process of resilience starts with older adults sharing a certain group of stressors through several practices. This can result in either developing or declining their resilience factors through different scenarios.

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Júnior, Edson Daher de Lima. "Os impactos da Covid-19 no mercado financeiro digital em Portugal." Master's thesis, Instituto Superior de Economia e Gestão, 2021. http://hdl.handle.net/10400.5/23409.

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Mestrado Bolonha em Economia e Gestão de Ciência, Tecnologia e Inovação
O mundo está acompanhando uma transformação do setor financeiro, pois o serviço burocrático da banca tradicional agora pode ser feito com facilidade e agilidade do próprio telemóvel em sua grande parte. As Fintechs têm uma participação em evidência nessa transformação e revolução no setor financeiro digital, embora ainda se tem poucos estudos concretos sobre o tema, talvez pela complexidade e dimensão que o setor financeiro ocupa na esfera digital. Neste contexto, acompanhamos o mundo a fazer confinamento em suas casas, devido a crise sanitária mundial, causada pelo COVID-19 que teve início no fim do ano de 2019. Devido ao confinamento o mundo desacelerou, incluindo suas relações sociais, económicas e gerais. Neste período o que se pode notar, foi que as relações humanas continuaram principalmente através do mundo digital, embora seja muito recente para se verificar as reais consequências e proporções que a pandemia causou. Com o intuito de ajudar a suprimir esta necessidade de descobrir os caminhos adotados pelo setor financeiro durante o período desta crise sanitária, este estudo pretende compreender em quatro aspetos como as empresas do setor financeiro digital atuaram. Primeiro, define as plataformas digitais, onde acontecem as interações de todos os agentes do universo digital, a fim de identificar o ecossistema financeiro digital. Segundo, define as FinTechs e o espaço no qual estão a se destacar neste ecossistema. Terceiro, analisa o potencial crescimento do mercado digital no período de pandemia, buscando identificar possíveis relações com o crescimento financeiro digital e por fim, compreender através da análise de casos práticos, como algumas instituições que fazemparte do ecossistema financeiro digital, atuaram para dar continuidade as transações financeiras em escala digital no período pandémico. A presente investigação foi desenvolvida tendo por base uma metodologia qualitativa, baseado em três entrevistas semiestruturadas com empresas que pertencem ao ecossistema financeiro digital de Portugal. A evidência empírica demonstrou que o mercado financeiro digital se expandiu durante o período de pandemia e que as Startups FinTechs tiveram um papel fundamental no processo da transformação do setor financeiro digital, aprimorando e adaptando as tecnologias utilizadas.
The world is following a transformation of the financial sector, because the bureaucratic service of traditional banking can now be done with ease and agility from the smartphone itself, for the most part. Fintechs have an evident participation in this transformation and revolution in the digital financial sector, although there are still few concrete studies on the subject, perhaps due to the complexity and dimension that the financial sector occupies in the digital sphere. In this context, we accompany the world in confinement in their homes, due to the global health crisis, caused by COVID-19 that began at the end of 2019. Due to confinement the world has slowed down, including its social, economic and general relations. In this period, it can be seen that the human relationships continued mainly through the digital world, although it is too recent to verify the real consequences and proportions the pandemic caused. In order to help suppress this need to discover the paths adopted by the financial sector during the period of this health crisis, this study aims to understand in four aspects how companies in the digital financial sector operated. First, it defines the digital platforms, where the interactions of all the agents of the digital universe take place, in order to identify the digital financial ecosystem. Second, it defines FinTechs and the space in which they are excelling in this ecosystem. Third, it analyzes the potential growth of the digital market during the pandemic period, seeking to identify possible relationships with digital financial growth and, finally, to understand through the analysis of practical cases, how some institutions that are part of the digital financial ecosystem acted to continue financial transactions on a digital scale in the pandemic period. The present investigation was developed based on a qualitative methodology, based on three semi-structured interviews with companies that belong to Portugal's digital financial ecosystem. Empirical evidence has shown that the digital financial market expanded during the pandemic period and that FinTech Startups played a key role in th process of transforming the digital financial sector, improving and adapting the technologies used.
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Moisander, Agnes. "Covid-19: främjare eller hämmare av digitalisering i arbetssystem : En fallstudie om digital transformation och digital motståndskraft i en svensk nischbank." Thesis, Södertörns högskola, Medieteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-44293.

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The study was conducted in an information system according to the definition of a worksystem, in a swedish niche bank. Where the effects of the current pandemic and its consequences regarding digital transformation and digital resilience have been investigated.These two have previously been studied, but received increased attention during the outbreak, since digitization, adaptation and innovation now are considered of high importance for survival. All these are found in the concepts of digital transformation and digital resilience. A qualitative case study with an abductive approach was conducted to examine previous topics where several interviews took place with selected employees from different areas of expertise. The results have shown that many changes during the pandemic are of high importance to survive, now a digital focus and innovations needs to be applied and this way of thinking will continue long after the pandemic. Nevertheless, the company investigated has not yet implemented any major changes, even though awareness of these has increased and opened up for discussion regarding changes in the future. As many new opportunities arise, these should have been used to improve many aspects of the business, but instead development of internal processes improved the most. One reason for this is the obligation to work remotely because it is required during these circumstances. But there is also potentialfor the development of the business regarding customers not only internally. Because all the changes companies identify should also affect the customers, target groups and markets.
Studien har genomförts på ett informationssystem utefter definitionen av arbetssystem i en svensk nischbank. Där har rådande pandemis effekter undersökts i dess konsekvenser gällande digital transformation och digital motståndskraft. Dessa två är något som tidigare studerats inom informatik, men fått ökad uppmärksamhet i och med Covid-19 eftersom digitalisering, anpassning, återhämtning och nya digital innovationer anses som ett måste för att går stärkt ur eller överleva pandemin. Alla dessa måsten återfinns i begreppen digital transformation och digital motståndskraft. Undersökningen har tillämpat en kvalitativ fallstudie med abduktiv ansats för att undersöka detta, där intervjuer har genomförts med nyckelpersoner från olika områden inom arbetssystemet. Resultatet har visat på att många förändringar har uppmärksammats av pandemin, att ett digitalt fokus och innovationer behöver tillämpas och detta tankesätt kommer företaget föra med sig efter pandemin. Det har trots detta inte genomfört några större förändringar ännu även om medvetenheten har ökat och en diskussion har öppnats. Eftersom det tillkommit nya möjligheter borde dessa nyttjats inom flera delar och områden, men detsom varit i fokus är främst utvecklingen av interna processer, det vill säga verksamheten. Detta för att kunna bedriva arbete på distans som varit ett krav i dessa omständigheter. Därmed finns det potential att även utveckla affären mer framöver eftersom alla förändringar som företag upplever, borde också påverka kunderna, målgrupper och marknader.

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Blomkvist, Mattias, and Anton Eling. "Digital Maturity and Organizational Resilience during Crisis : An Exploratory Single Case Study within B2B Sales Interactions during COVID-19." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-84920.

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Over the past decade, digitalization has played an increasingly important and prominent role in the competitiveness of businesses. The pace of digitalization is not slowing down and has only intensified rapidly over recent years. Because of this, businesses that invest a significant amount of resources toward digitalization could increase and strengthen their competitive advantage and develop their digital maturity, which can be described as the technological functions and visions available for a firm. In the wake of the COVID-19 pandemic, the pace of digitalization was intensified further, and many businesses were forced to adapt their business activities through digital channels to stay operational. Furthermore, a specific field affected by the governmental restrictions was B2B sales interactions, which has caused several problems for firms that do not have sufficient technological functions to adapt to digital channels, the digital capabilities can be described as sufficient. To counteract the pandemic effects, organizational resilience is an aspect that is activated to aid companies in parrying the effects of the sudden shock, in this case, caused by COVID-19 and can be described as the resources made available by management to respond and adapt to unexpected events. Hence, the purpose of this study is to investigate how sales interactions were impacted, by investigating the level of digital maturity and organizational resilience of one specific company, during the COVID19 pandemic. This was conducted through an exploratory single case study of a global biomaterials company where digital maturity was measured through a survey followed by an in-depth interview to assess the company’s organizational resilience.The findings suggest a clear link between the digital maturity level of a firm and how well it can be utilized in organizational resilience efforts when re-shaping the business landscape. Furthermore, the study highlights that digitalization is becoming a prominent factor in the way businesses and sales are conducted and even more in the times of crisis, thus, highlighting the importance of digital maturity. Based on the insights gained from the in-depth interview, a conceptual framework called digital activation of resilience within sales interactions was constructed. This framework highlights what was discovered in this single case to be the main influences on sales interactions and how digital maturity aids the activation of resilience.
Under det senaste årtiondet har digitalisering fått en allt mer betydande roll inom företagande för att behålla konkurrensfördelar där takten av digital utveckling har accelererat frekvent. Detta har lett till att företag har investerat signifikanta summor i digitala hjälpmedel för att förbättra sina konkurrensfördelar och öka sin digitala mognad, där den digitala mognaden beskrivs som de tekniska resurser och vision som är tillgängligt för företaget. Till följd av pandemin fick intensiteten av digitalisering en massiv ökning då många företag tvingats att ställa om sin verksamhet och kommunikation till digitala kanaler. Ett affärsområde som drabbats hårt var försäljningsaspekten mellan företag (B2B) som till följd av regeringens direktiv tvingats ställa om sitt sätt att interagera med sina kunder. Företag som inte hade en väl utvecklad digitaliserad verksamhet drabbades hårt av detta. För att kunna hantera denna externa chock mot sin verksamhet krävs organisatorisk motståndskraft, som kan beskrivas som de resurser som finns tillgängliga för att hantera oförutsedda kriser och händelser som består av åtgärder som kan parera effekterna av kriser som COVID-19. Denna fallstudie var en undersökande studie där, en global koncern inom produkter och biomassa skulle generera svaren som behövdes för att mäta digital mognad och organisatorisk motståndskraft. Den digitala mognaden av företaget togs fram med hjälp av en enkät och svaren angående deras organisatoriska motståndskraft genererades med hjälp av en personlig intervju. Syftet med denna studie är därför att undersöka hur sälj interaktioner har förändrats baserat på grad av digital mognad och organisatorisk motståndskraft under pandemin. Resultatet av denna studie hänvisar till ett samband mellan nivån av digital mognad hos ett företag och hur väl denna mognad kan komma till nytta vid aktioner via organisatorisk motståndskraft när det kommer till utformandet av affärs interaktioner. Vidare så bidrar studien till att visa hur digitalisering är på väg att bli en vital faktor i genomförandet av affärer och sälj interaktioner i framtiden och därav framhäver vikten av att besitta god digital mognad. Baserat på insikten som uppkom från den djupgående intervjun så skapades en modell som lyfter fram de beståndsdelar av modellerna som påvisats ha en påverkan på sälj interaktioner och hur digital mognad stödjer den organisatoriska motståndskraften

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Julius, Alexandria Marie. "Characterizing Disaster Resilience Using Very High Resolution Time-Sequence Stereo Imagery." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524211742718203.

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Wilding, Nicholas Crispin. "Toward the digital wilds : experiments in social learning with 'Fiery Spirits Community of Practice'." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589648.

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The thesis presents and inquires into a first person research story about the development of a ‘Community of Practice’ for asset-based rural development practitioners from across the UK and Republic of Ireland. It includes an account of how geographically remote members of the CoP were supported to come together over eighteen months to co-produce an online handbook called ‘Exploring Community Resilience’ (included as Appendix 1). Findings include: - Social networking and social media technologies can be powerful enablers of third and second person inquiry; - A compass tool (included here) can help hosts and curators make good design and facilitation choices as they host the emergence of complex, large scale social learning architectures (which this thesis calls ‘Digital Forests’); - Action researchers can benefit from developing skills as digital curators, producers of social media, and hosts of transformative learning processes; - Future generations of social media are likely to challenge the assumptions, methods and findings of this thesis. As we navigate our way into this fast changing future, it will be helpful to inquire into their impacts of new generations of digital technologies on our personal and collective psychological, cultural and social wellbeing.

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BJÄRKBY, SARAH, and FRIDA VÄRNLUND. "Ensuring Safety and Security in the Era of Digital Water : A qualitative study on the implications following the digital transformation of the Swedish water industry." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299627.

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As water systems are critical infrastructures, their continuous service is essential for maintaining vital functions of society. During the past decades, a number of severe global challenges have put increasing pressure on the water systems, threatening the quality and availability of water. Digitalization is expected to play a fundamental role in managing these challenges, making the digital transformation of the water industry an imperative rather than a choice for water utility providers. However, the implementation of digital solutions also entails a number of challenges, risks and vulnerabilities to water systems. As such, water utility providers are faced with increased complexity and uncertainty, where the safety and security of the system is at stake. This thesis addresses the potential implications of a digital transformation of the water industry by exploring how digitalization affects the Swedish water sector from a safety and security perspective. By doing so, the thesis aims to enhance the understanding of how Swedish water utility providers can manage its ongoing digital transformation. The thesis consists of a qualitative research study where interviews with 16 representatives from the Swedish water industry contributed with a broad perception of the implications of the digital transformation. Theory on high reliability organizations and resilience was applied to obtain a deeper understanding of what the potential safety and security implications may entail for Swedish water utilities in managing and reaping the benefits of their digital transformation. The study finds that representatives from the Swedish water sector mainly view benefits related to the efficiency of their operations from their ongoing digital transformation, while the mentioned drawbacks are generally related to their organizational abilities in managing the emerging risks and increased level of complexity. With increasing digitalization, Swedish water utilities coincide with the high reliability organization theory to a higher extent, which emphasizes the increasing importance of employing bothtechnical reliability and organizational resilience practices. This thesis concludes that technical reliability has historically been well-managed and prioritized by utilities, whilst organizational resilience has become an increasingly important aspect to focus on with increasing digitalization. Hence, practices of organizational resilience, such as incorporating clear strategies, integrating work between divisions and increasing follow-up from disturbances, should be employed on a wider scale among water utilities.
Då vattensystem är kritisk infrastruktur är deras kontinuerliga funktion avgörande för att upprätthålla vitala funktioner i samhället. Under de senaste decennierna har ett antal allvarliga globala utmaningar ökat trycket på vattensystemen, vilket hotar vattnets kvalitet och tillgänglighet. Digitalisering anses vara avgörande för att hantera dessa utmaningar, vilket gör digitalisering av vattenindustrin till en nödvändighet snarare än ett val för VA-bolag. Att implementera digitala lösningar medför emellertid också ett antal utmaningar, risker och sårbarheter för vattensystem. VA-bolagen står således inför en ökad komplexitet och osäkerhet där systemsäkerheten står på spel. Denna uppsats behandlar de potentiella implikationer som kan uppstå av en digital transformation av vattenindustrin genom att undersöka hur digitalisering påverkar den svenska VA-sektorn ur ett säkerhetsperspektiv. Genom detta syftar uppsatsen till att öka förståelsen för hur svenska VA-bolag kan hantera sin pågående digitalisering. En kvalitativ forskningsstudie har genomförts där intervjuer med 16 representanter från den svenska VA-sektorn bidrog med en bred uppfattning om digitaliseringens implikationer för den svenska VA-sektorn. Teori om high reliability organizations och resiliens användes för att fördjupa förståelsen för vad de potentiella säkerhetsimplikationerna kan innebära för svenska VAbolag, både för hantering av riskerna och för att ta till vara på fördelarna med den digitala transformationen. Studien visar att representanter från den svenska VA-sektorn, i deras pågående digitalisering, huvudsakligen ser fördelar relaterade till effektiviteten i vattenproduktionen, medan de nämnda nackdelarna i allmänhet är relaterade till deras egna förmågor att hantera de framväxande riskerna och den ökade komplexiteten. Med ökad digitalisering kan svenska VA-bolag i högre utsträckning beskrivas med teori kring high reliability organizations, vilket medför en ökad vikt av att arbeta med både teknisk tillförlitlighet och organisatorisk resiliens. Teknisk tillförlitlighet har historiskt hanterats väl och prioriterats av VA-bolag, medan organisatorisk resiliens har blivit allt viktigare att fokusera på med ökad digitalisering. Därför drar denna uppsats slutsatsen att arbete med organisatorisk resiliens, såsom att införa tydliga strategier, integrera arbetet mellan avdelningar och öka uppföljningsarbetet efter störningar, bör utföras i större skala bland VA-bolag.

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Burrow, Ryan David. "Enhancing Input/Output Correctness, Protection, Performance, and Scalability for Process Control Platforms." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/89903.

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Most modern control systems use digital controllers to ensure safe operation. We modify the traditional digital control system architecture to integrate a new component known as a trusted input/output processor (TIOP). TIOP interface to the inputs (sensors) and outputs (actuators) of the system through existing communication protocols. The TIOP also interface to the application processor (AP) through a simple message passing protocol. This removes any direct input/output (I/O) interaction from taking place in the AP. By isolating this interaction from the AP, system resilience against malware is increased by enabling the ability to insert run-time monitors to ensure correct operation within provided safe limits. These run-time monitors can be located in either the TIOP(s) or in independent hardware. Furthermore, monitors have the ability to override commands from the AP should those commands seek to violate the safety requirements of the system. By isolating I/O interaction, formal methods can be applied to verify TIOP functionality, ensuring correct adherence to the rules of operation. Additionally, removing sequential I/O interaction in the AP allows multiple I/O operations to run concurrently. This reduces I/O latency which is desirable in many control systems with large numbers of sensors and actuators. Finally, by utilizing a hierarchical arrangement of TIOP, scalable growth is efficiently supported. We demonstrate this on a Xilinx Zynq-7000 programmable system-on-chip device.
Master of Science
Complex modern systems, from unmanned aircraft system to industrial plants are almost always controlled digitally. These digital control systems (DCSes) need to be verified for correctness since failures can have disastrous consequences. However, proving that a DCS will always act correctly can be infeasible if the system is too complex. In addition, with the growth of inter-connectivity of systems through the internet, malicious actors have more access than ever to attempt to cause these systems to deviate from their proper operation. This thesis seeks to solve these problems by introducing a new architecture for DCSes that uses isolated components that can be verified for correctness. In addition, safety monitors are implemented as a part of the architecture to prevent unsafe operation.

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Cerqueira, Valdenice Minatel Melo de. "Resiliência e tecnologias digitais móveis no contexto da educação básica: senta que lá vem a história." Pontifícia Universidade Católica de São Paulo, 2014. https://tede2.pucsp.br/handle/handle/9775.

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Made available in DSpace on 2016-04-27T14:31:21Z (GMT). No. of bitstreams: 1 Valdenice Minatel Melo de Cerqueira.pdf: 4853814 bytes, checksum: 9f1ec9cc78787554a18c679826fce57d (MD5) Previous issue date: 2014-02-26
This narrative-based work is attached to the line of research known as New Technologies in Education of Education Program: Curriculum from PUC - SP. This is a descriptive and qualitative-related study that evolved from the implementation of Dante Tablet program in Dante Alighieri School between 2011 and 2012. The overall objective of this work is to observe, describe and analyze the actions employed in the implementation of a program intended for the integration of information, communication, mobile and digital technologies into the curriculum of a school of basic education, while identifying the resiliencies arisen concerning this implementation. For this, we carried out analyses on documents that reveal the history and routine of the mentioned school, among them records of the institution s foundation, its Internal Regulations, accounts of meetings for training teachers, reports of students and teachers steering committees, notes of teaching practices, and questionnaires for teachers of tenth-grade secondary school and students of the Student Steering Committee. The journey to Paradise of the poet Dante Alighieri, described in the book "The Divine Comedy", was used as a metaphor of the methodological process. As to the narrative that supports this work, its development was conducted in a spiral manner, from the concept of Valente s spiral learning. In this paper, the idea of resilience, taken from Simpson and Tavares studies, refers to actions that provide the ability to overcome difficulties and adversities. In addition to these authors, the theoretical framework also comprehends Almeida with regard to issues on curriculum web and Freire over his view on education as an intervention in the world that enables change and transformation. Throughout the work, we identified four resilient actions that were predominant for the maintenance of Dante Tablet program, which are: the creation of the Student Steering Committee; the amplified use of Virtual Learning Environment (MOODLE); the identification, encouragement and enhancement of successful practices that favored aspects of students and teachers authorship; and the provision of a high-quality connection to the Internet, which allows activities involving since the simple ones, such as searching and selecting information, until those that promote students authorship and co-authorship as well as, in a collaborative way, the production and organization of knowledge through cloud computing. The verification of these actions was possible through some indicators that, established by Fullan, are called in this research vectors namely, need, clarity, complexity and quality. In addition to the identification of those resilient actions, another finding of this work was that the process of integration of digital technologies into curriculum should be designed and effected from a deep reflection and a broad dialogue, with the participation of each individual involved in the pedagogical task (in particular, teachers, students and administrators) so as to approach the subject from the perspective of a shared management of web curriculum, prioritizing an online integration of people, ideas, knowledge and cultures. Finally, the expectation is that this work can contribute to the debate on integration of mobile digital technologies into the curriculum within the Brazilian basic education
A presente investigação de natureza narrativa integra-se na linha de pesquisa das Novas Tecnologias em Educação do Programa Educação: Currículo da PUC-SP. Trata-se de um estudo descritivo, de natureza qualitativa, e que se desenvolveu a partir da implantação do programa Dante Tablet no Colégio Dante Alighieri entre os anos de 2011 e 2012. O objetivo geral da pesquisa é observar, descrever e analisar as ações empregadas na implantação de um programa de integração das tecnologias digitais móveis da informação e comunicação (TDM) ao currículo de uma escola de educação básica, identificando as resiliências surgidas nesse processo. Para tanto, foram feitas análises de documentos que deixam transparecer a história e o cotidiano do referido colégio, entre os quais: relatos sobre a fundação do colégio, Regimento Interno, atas de reuniões dos comitês de gestão (docente e discente), apontamentos de práticas pedagógicas dos professores, além de questionários para professores das 1ª séries do Ensino Médio e alunos do Comitê Gestor Discente. A viagem rumo ao Paraíso do poeta Dante Alighieri, descrita na obra A Divina Comédia , foi utilizada como metáfora do processo metodológico. Relativamente à narrativa que sustenta esta tese, seu desenvolvimento foi conduzido de maneira espiralada, a partir do conceito de espiral de aprendizagem de Valente. A resiliência, neste trabalho, remete às ações que oferecem capacidade de superar dificuldades e transpor situações adversas, e foi estudada a partir de Simpson e Tavares. Além desses autores, o aporte teórico também referencia Almeida nas questões de web currículo e Freire na perspectiva da educação como intervenção no mundo, possibilitando mudanças e transformações. Ao longo do trabalho, identificaram-se quatro ações resilientes que foram preponderantes para a sustentação do programa Dante Tablet: a criação do Comitê Gestor Discente; a utilização ampliada do ambiente virtual de aprendizagem criado no MOODLE; a identificação e valorização de práticas exitosas que favoreceram aspectos relacionados com a autoria de alunos e professores; e a oferta de uma conexão de qualidade com a internet, que possibilitou a realização de atividades desde as mais simples, como a busca e seleção de informações, até aquelas que promovem a autoria dos alunos e, de forma colaborativa, a produção e a organização do conhecimento por meio de serviços nas nuvens. A identificação dessas ações se deu por meio de alguns indicadores que, estabelecidos a partir do trabalho de Fullan, são chamados nesta pesquisa de vetores a saber, necessidade, clareza, complexidade e qualidade. Em complemento à identificação das ações resilientes, constatou-se que o processo de integração das tecnologias digitais ao currículo deve ser pensado e efetivado a partir de uma reflexão, de um diálogo, com a participação de todos os sujeitos do ato pedagógico (em particular, professores, alunos e gestores) na perspectiva de uma gestão compartilhada, do web currículo, priorizando uma integração, em rede, de pessoas, ideias, conhecimentos e culturas. Finalmente, a expectativa é a de que este trabalho possa contribuir para a reflexão sobre integração das tecnologias digitais móveis ao currículo, no âmbito da educação básica brasileira

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Rodriguez, Carmella M. "The Journey of a Digital Story: A Healing Performance of Mino-Bimaadiziwin: The Good Life." Antioch University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1433005531.

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Vaquero, Tió Eduard. "Estudio sobre la resiliencia y las competencias digitales de los jóvenes adolescentes en situación de riesgo de exclusión social." Doctoral thesis, Universitat de Lleida, 2013. http://hdl.handle.net/10803/116373.

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En un moment històric en què les TIC representen els mitjans de la Societat de la Informació cal plantejar-se si la Resiliència (la capacitat de fer front a les adversitats) està relacionada amb la Competència Digital (CD), i si pot ser fomentada a través de mitjans digitals. L'estudi, de caràcter exploratori, analitza quina relació hi ha entre la Resiliència i la CD establint comparacions i correlacions en dos grups d'una mostra de 435 adolescents, un d'ells en situació de risc d'exclusió social. Els resultats assenyalen diferències significatives entre ambdós grups, tant en la Resiliència com en la CD. Els resultats també indiquen que menors puntuacions en la Resiliencia dels adolescents en situació de risc estan relacionades amb menors puntuacions en la CD, especialment en un dels factors de Resiliencia, la Cohesió Familiar. Es constata la influència que tenen les diferents situacions familiars d'ambdós grups en la superació de riscos i adversitats. Es posa de manifest que els adolescents no tenen la mateixa CD donades les diferents característiques i influències socials, familiars i contextuals i, per tant, no utilitzen les TIC de la mateixa manera. Tantmateix, a nivell pràctic, les TIC tenen un alt potencial com a mecanisme d'apoderament de la infància i l'adolescència, que fa necessari el disseny i la implementació d'intervencions socioeducatives que plantegin com millorar la qualitat de vida utilitzant les TIC com a mitjà o estratègia.
En un momento histórico en que las TIC representan los medios de la Sociedad de la Información hay que plantearse si la Resiliencia (la capacidad de hacer frente a las adversidades) está relacionada con la Competencia Digital (CD), y si puede ser fomentada a través de medios digitales. El estudio, de carácter exploratorio, analiza qué relación existe entre la Resiliencia y la CD estableciendo comparaciones y correlaciones en dos grupos de una muestra de 435 adolescentes, uno de ellos en situación de riesgo de exclusión social. Los resultados señalan diferencias significativas entre ambos grupos, tanto en la Resiliencia como en la CD. Los resultados también indican que menores puntuaciones en la Resiliencia de los adolescentes en situación de riesgo están relacionadas con menores puntuaciones en la CD, especialmente en uno de los factores de Resiliencia, la Cohesión Familiar. Se constata la influencia que tienen las diferentes situaciones familiares de ambos grupos en la superación de riesgos y adversidades. Se pone de manifiesto que los adolescentes no tienen la misma CD dadas las diferentes características e influencias sociales, familiares y contextuales y, por tanto, no utilizan las TIC de la misma manera. Sin embargo, a nivel práctico, las TIC tienen un alto potencial como mecanismo de empoderamiento de la infancia y la adolescencia, que hace necesario el diseño y la implementación de intervenciones socioeducativas que planteen cómo mejorar la calidad de vida utilizando las TIC como a medio o estrategia.
In a historical moment which ICTs represents the means and tools of the Information Society should consider whether the resilience (the ability to cope with adversity) is related to Digital Literacy (DL), and if it can be promote through digital environments. This exploratory study analyzes the relationship between resilience and the DL making comparisons and correlations on two groups of a 435 teenager’s sample, one of them at social risk exclusion. The results indicate significant differences between the two groups, in both the resilience and the DL. The results also indicate that lower scores on the resilience of adolescents at social risk are related to lower scores on the DL, especially in one of the factors of resilience, the Family Cohesion. Research notes that influence of different family situations of both groups to overcome risk and adversity. In addition, it shows that teens do not have the same DL given the different characteristics and social influences, family context and, therefore, do not use ICT in the same way. However, in practice, ICT have a high potential as a mechanism to empower children and adolescents, and it is necessary to design and implement social and educational interventions to improve the quality of life using ICT as mechanism or strategy.

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Manuelito, Brenda K. "Creating Space for an Indigenous Approach to Digital Storytelling: "Living Breath" of Survivance Within an Anishinaabe Community in Northern Michigan." Antioch University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1433004268.

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Stine, Daniel E. (Daniel Evans). "Digital signatures for a Byzantine resilient computer system." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36578.

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Camara, Youssouf. "Four essays on empirical economics in the era of high-frequency data." Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAT016.

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Cette thèse utilise des données de transaction de paiement par carte bancaire dites données à haute fréquence pour identifier les effets causaux d'innovations technologiques et de la pandémie de COVID-19. Le premier chapitre évalue l'impact causal de récentes innovations dans les paiements numériques, et plus particulièrement, la carte de paiement sans contact. Nous montrons que l'adoption de la technologie de paiement sans contact affecte significativement l'activité économique des commerces qui adoptent cette technologie par rapport à ceux qui ne l'adoptent pas à travers notamment des effets d'entrainement. Les effets sont particulièrement marqués pour les petites et les nouveaux commerces, et montrent l'impact réel des innovations technologiques. Le deuxième chapitre explore le rôle de la technologie de paiement sans contact dans l'atténuation de l'impact d'un choc économique tel que celui de la pandémie de COVID-19, et étudie donc la résilience des commerces. Les résultats indiquent que les commerçants disposant de la technologie de paiement sans contact ont mieux résisté aux chocs de la COVID-19 que celles qui ne l'utilisent pas encore. Ce travail fournit une preuve solide que l'acceptation des paiements sans contact pendant un choc épidémique aide les commerçants à acquérir davantage de nouveaux clients. A l'image du premier chapitre, nous soutenons l'idée que la technologie de paiement sans contact continue de soutenir la croissance des ventes des commerces et accélère la substitution entre les paiements numériques et non numériques. Dans le troisième chapitre, nous estimons l'impact de la COVID-19 sur la mobilité et les dépenses des consommateurs. Nous examinons également le rôle du commerce en ligne dans la reprise rapide de l'activité commerciale lorsqu'une économie est frappée par un choc inattendu qui paralyse l'activité des commerces physiques. Nous montrons que les mesures sanitaires visant à limiter la propagation de l'épidémie COVID-19 ont réduit de moitié la mobilité des consommateurs et les dépenses de consommation. En ce qui concerne la baisse des dépenses, nous constatons qu'elle est environ deux fois plus importante que la baisse des dépenses en ligne. Les analyses au niveau sectoriel soulignent le rôle prépondérant du commerce en ligne pour combler les lacunes et rendre l'économie plus résiliente en cas de fermeture totale des points de vente physiques. Le dernier chapitre quant à lui se concentre sur l'analyse du comportement de consommation spatiale et sur l'impact du développement du commerce en ligne sur les liens commerciaux régionaux. Il montre que les transactions en ligne, en plus de se produire plus fréquemment en dehors de la région d'origine du consommateur, sont plus concentrées dans les régions déjà développées. Le développement du commerce en ligne a augmenté la concentration de l'activité économique globale, et peut avoir des implications importantes pour le développement économique régional
This thesis uses card payment transaction data known as high-frequency data to identify the causal effects of technological innovations and the COVID-19 pandemic. The first chapter assesses the causal impact of recent disruptive innovations in digital payments, specifically, the contactless payment card. We show that the introduction of contactless payment technology significantly affects the economic activity of businesses that adopt this technology compared to those that do not, notably through spillover effects. The effects are particularly strong for small and new businesses, and show the real impact of technological innovations. The second chapter explores the role of digital payment technologies in mitigating the impact of shocks through improving business resilience. The results indicate that businesses with the latest digital payment technology were more resilient to COVID-19 shocks than those not yet using it. They also show that accepting contactless payments during an epidemic shock helps businesses acquire more new customers. Like the first chapter, we argue that digital payment technology continues to support sales growth and accelerates the substitution between digital and non-digital payments. In the third chapter, we estimate the impact of COVID-19 on consumer mobility and spending. We also examine the role of online commerce in the rapid recovery of business activity when an economy is hit by an unexpected shock that paralyzes offline activity. We show that public health measures to limit the spread of the COVID-19 epidemic sharply reduced consumer mobility and spending by more than half. Concerning the decline in spending, we find that it is about twice as large as the decline in online spending. Sector-level analyses highlight the key role of online commerce in filling gaps and making the economy more resilient in the event of total off-line retail closure. The last chapter focuses on the analysis of spatial consumption behavior and the impact of online trade development on regional trade linkages. It shows that online transactions, in addition to occurring more frequently outside the consumer's home region, are more concentrated in already developed regions. The development of online commerce has increased the concentration of overall economic activity and may have important implications for regional economic development

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Kleeberger, Veit [Verfasser]. "Resilient Cross-Layer Design of Digital Integrated Circuits / Veit Kleeberger." München : Verlag Dr. Hut, 2015. http://d-nb.info/1067708855/34.

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Lee, Yen-Chi. "Error resilient video streaming over lossy networks." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180302/unrestricted/lee%5fyen-chi%5f200312%5fphd.pdf.

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Chen, Wu-hsiang Jonas. "Error-resilient techniques for packet video communications /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/5850.

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Montes, Luis Roger Atero. "Resilient evolutionary source coding for wireless mobile TV/video image communication systems." Thesis, Staffordshire University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311039.

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Kim, Joohee. "Error-resilient video streaming over lossy channels." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/13723.

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Wang, Jiyuan. "A Localized Geometric-Distortion Resilient Digital Watermarking Scheme Using Two Kinds of Complementary Feature Points." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1213.

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With the rapid development of digital multimedia and internet techniques in the last few years, more and more digital images are being distributed to an ever-growing number of people for sharing, studying, or other purposes. Sharing images digitally is fast and cost-efficient thus highly desirable. However, most of those digital products are exposed without any protection. Thus, without authorization, such information can be easily transferred, copied, and tampered with by using digital multimedia editing software. Watermarking is a popular resolution to the strong need of copyright protection of digital multimedia. In the image forensics scenario, a digital watermark can be used as a tool to discriminate whether original content is tampered with or not. It is embedded on digital images as an invisible message and is used to demonstrate the proof by the owner. In this thesis, we propose a novel localized geometric-distortion resilient digital watermarking scheme to embed two invisible messages to images. Our proposed scheme utilizes two complementary watermarking techniques, namely, local circular region (LCR)-based techniques and block discrete cosine transform (DCT)-based techniques, to hide two pseudo-random binary sequences in two kinds of regions and extract these two sequences from their individual embedding regions. To this end, we use the histogram and mean statistically independent of the pixel position to embed one watermark in the LCRs, whose centers are the scale invariant feature transform (SIFT) feature points themselves that are robust against various affine transformations and common image processing attacks. This watermarking technique combines the advantages of SIFT feature point extraction, local histogram computing, and blind watermark embedding and extraction in the spatial domain to resist geometric distortions. We also use Watson’s DCT-based visual model to embed the other watermark in several rich textured 80×80 regions not covered by any embedding LCR. This watermarking technique combines the advantages of Harris feature point extraction, triangle tessellation and matching, the human visual system (HVS), the spread spectrum-based blind watermark embedding and extraction. The proposed technique then uses these combined features in a DCT domain to resist common image processing attacks and to reduce the watermark synchronization problem at the same time. These two techniques complement each other and therefore can resist geometric and common image processing attacks robustly. Our proposed watermarking approach is a robust watermarking technique that is capable of resisting geometric attacks, i.e., affine transformation (rotation, scaling, and translation) attacks and other common image processing (e.g., JPEG compression and filtering operations) attacks. It demonstrates more robustness and better performance as compared with some peer systems in the literature.

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Khairullah, Shawkat Sabah. "Toward Biologically-Inspired Self-Healing, Resilient Architectures for Digital Instrumentation and Control Systems and Embedded Devices." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5671.

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Digital Instrumentation and Control (I&C) systems in safety-related applications of next generation industrial automation systems require high levels of resilience against different fault classes. One of the more essential concepts for achieving this goal is the notion of resilient and survivable digital I&C systems. In recent years, self-healing concepts based on biological physiology have received attention for the design of robust digital systems. However, many of these approaches have not been architected from the outset with safety in mind, nor have they been targeted for the automation community where a significant need exists. This dissertation presents a new self-healing digital I&C architecture called BioSymPLe, inspired from the way nature responds, defends and heals: the stem cells in the immune system of living organisms, the life cycle of the living cell, and the pathway from Deoxyribonucleic acid (DNA) to protein. The BioSymPLe architecture is integrating biological concepts, fault tolerance techniques, and operational schematics for the international standard IEC 61131-3 to facilitate adoption in the automation industry. BioSymPLe is organized into three hierarchical levels: the local function migration layer from the top side, the critical service layer in the middle, and the global function migration layer from the bottom side. The local layer is used to monitor the correct execution of functions at the cellular level and to activate healing mechanisms at the critical service level. The critical layer is allocating a group of functional B cells which represent the building block that executes the intended functionality of critical application based on the expression for DNA genetic codes stored inside each cell. The global layer uses a concept of embryonic stem cells by differentiating these type of cells to repair the faulty T cells and supervising all repair mechanisms. Finally, two industrial applications have been mapped on the proposed architecture, which are capable of tolerating a significant number of faults (transient, permanent, and hardware common cause failures CCFs) that can stem from environmental disturbances and we believe the nexus of its concepts can positively impact the next generation of critical systems in the automation industry.

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Chae, Kwanyeob. "Design methodologies for robust low-power digital systems under static and dynamic variations." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52174.

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Variability affects the performance and power of a circuit. Along with static variations, dynamic variations, which occur during chip operation, necessitate a safety margin. The safety margin makes it difficult to meet the target performance within a limited power budget. This research explores methodologies to minimize the safety margin, thereby improving the energy efficiency of a system. The safety margin can be reduced by either minimizing the variation or adapting to the variation. This research explores three different methods to compensate for variations efficiently. First, post-silicon tuning methods for minimizing variations in 3D ICs are presented. Design methodologies to apply adaptive voltage scaling and adaptive body biasing to 3D ICs and the associated circuit techniques are explored. Second, non-design-intrusive circuit techniques are proposed for adaptation to dynamic variations. This work includes adaptive clock modulation and bias-voltage generation techniques. Third, design-intrusive methods to eliminate the safety margin are proposed. The proposed methodologies can prevent timing-errors in advance with a minimized performance penalty. As a result, the methods presented in this thesis minimize static variations and adapt to dynamic variations, thereby, enabling robust low-power operation of digital systems.

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Gibiluka, Matheus. "Analysis of voltage scaling effects in the design of resilient circuits." Pontifícia Universidade Católica do Rio Grande do Sul, 2016. http://hdl.handle.net/10923/8104.

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Although the advancement of semiconductor technology enable the fabrication of devices with increasingly reduced propagation delay, potentially leading to higher operating frequencies, manufacturing process variability grows very aggressively in modern processes. To cope with growing variability phenomena, significant delay margins need to be added to clock signal’s periods, to ensure timing closure, which limits performance gains and constrains power efficiency. Among the several techniques that have been explored in the last decades to address these problems, three are quite relevant and promising either in isolation or combined: voltage scaling, asynchronous circuits and resilient architectures. This work investigates how voltage scaling affects circuit path delays, and produces three sets of original contributions. The first set establishes a technique to ensure that circuits synthesized with a reduced library achieve results comparable to the full library, while keeping functionality at low supply voltages. The second set of contributions composes a method to extend the voltage corners supported by standard cell libraries. This takes place through new library characterization techniques. The third set of contributions provides insights on the effects of voltage scaling in the design of resilient circuits. This analysis evaluates supply voltages in super- and sub-threshold levels.
Embora o avanço da tecnologia de semicondutores permita a fabricação de dispositivos com atrasos de propagação reduzidos, potencialmente habilitando o aumento da frequência de operação, as variações em processos de fabricação modernos crescem de forma muito agressiva. Para lidar com este problema, significativas margens de atraso devem ser adicionadas ao período de sinais de relógio, limitando os ganhos em desempenho e a eficiência energética do circuito. Entre as diversas técnicas exploradas nas últimas décadas para amenizar esta dificuldade, três se destacam como relevantes e promissoras, isoladas ou combinadas: a redução da tensão de alimentação, o uso de projeto assíncrono e arquiteturas resilientes. Este trabalho investiga como a redução de tensão de alimentação afeta os atrasos de caminhos em circuitos digitais, e produz três contribuições originais. A primeira é a definição uma técnica para garantir que circuitos sintetizados com um conjunto reduzido de células atinjam resultados comparaveis aos da biblioteca completa, mantendo a sua funcionalidade mesmo quando alimentados por tensões reduzidas. A segunda é a composição de um método para estender o suporte a níveis de tensão de alimentação para bibliotecas de células padrão providas por fabicantes de CIs, através de novas técnicas de caracterização de bibliotecas. A terceira é a análise dos efeitos do escalamento de tensão no projeto de circuitos resilientes, considerando tensões de alimentação superiores e inferiores à tensão de limiar dos transistores.

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Vicentini, Rafael Estéfano. "Uso de redes neurais artificiais para detecção de pele em imagens digitais." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152329.

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Na última década, o aumento da capacidade de processamento de informação em computadores e dispositivos de uso pessoal possibilitou o desenvolvimento de filtros e classificadores automatizados que operam em tempo real, aplicados em diversas áreas. No âmbito do Processamento Digital de Imagens associado às Redes Neurais Artificiais, os filtros emulam a percepção humana buscando por padrões para identificação de características de interesse. Filtros que têm por objetivo restringir o acesso a conteúdo impróprio partem da identificação de pele - principal indício de presença humana em uma imagem. Independentemente de sua complexidade e/ou robustez, caso o classificador não seja capaz de identificar as diferentes tonalidades de pele sob diferentes condições de captura, sua eficácia é prejudicada. Frente à diversificada forma de descrever uma tonalidade de pele usando diferentes espaços de cor, neste estudo foram destacados os espaços de cor RGB, YCbCr e HSV, amplamente utilizados em equipamentos de captura (por exemplo câmeras fotográficas e filmadoras digitais). A partir de exemplos apresentados durante a etapa de treinamento, as RNAs devem estar aptas para classificar as tonalidades em dois grupos distintos: pele e não pele. Dentre os espaços de cores indicados, seja utilizando ou descartando o aspecto da iluminação (critério amplamente discutido na literatura), este trabalho busca avaliar qual possui a maior taxa de detecção de pele em uma imagem.
Over the last decade, the increasing capacity of data processing in personal computers and devices could develop filters and automatic classifiers working in real time and applied in several areas. Considering Digital Image Processing and Artificial Neural Networks, these filters emulate the human perception searching for patterns to identify specific features. Filters which the main goal is to restrict the access to inappropriate content starts identifying skin tones - the main evidence of human presence in a picture. Although being complex and robust, if the classifier is not able to identify distinct skin tones under random capture conditions, the accuracy is minimal. Facing several ways on describing skin tones over different color spaces, this work uses the RGB, YCbCr and HSV color spaces which are widely applied in recording devices (photographic and digital cameras for example). Based on the examples shown during the training phase, the ANNs must be able to classify skin tones into two distinct groups: skin and non skin. Among the different color spaces used, considering or not the luminance aspect (widely discussed on papers), this work intends to evaluate which one has the highest detection accuracy to identify skin tone in such a picture.

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Melo, Geisla de Albuquerque. "UTILIZAÇÃO DE PROCESSAMENTO DIGITAL DE IMAGENS E REDES NEURAIS ARTIFICIAIS PARA O RECONHECIMENTO DE ÍNDICES DE SEVERIDADE DA FERRUGEM ASIÁTICA DA SOJA." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2015. http://tede2.uepg.br/jspui/handle/prefix/129.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
According to Embrapa (2013), Brazil is the world's second largest soy producer just after the United States. Season after season, the production and planted area in Brazil is growing, however, climatic factors and crop diseases are affecting plantation, preventing further growth, and causing losses to farmers. Asian rust caused by Phakopsora pachyrhizi, is a foliar disease, considered one of the most important diseases at present, because of the potential for loss. Asian rust can be mistaken for other diseases in soybeans, such as Bacterial Blight, a Stain Brown and Bacterial Pustule, due to similar visual appearances. Thus, the present study aimed to develop an application for mobile devices using the Android platform to perform automatic recognition of the Asian soybean rust severity indices to assist in the early diagnosis and therefore assist in decision-making as the management and control of the disease. For this, was used techniques of digital image processing (DIP) and Artificial Neural Networks (ANN). First, around 3.000 soybean leaves were collected in the field, where about 2.000 were harnessed. Then it were separated by severity index, photographed in a controlled environment, and after that were processed in order to eliminate noise and background images. Filtering preprocessing phase consisted of median filter, Gaussian filter processing for gray scale, Canny edge detector, expansion, find and drawcontours, and finally the cut of leaf. After this was extracted color and texture features of the images, which were the average R, G and B Variant also for the three channels R, G and B according angular momentum, entropy, contrast, homogeneity, and finally correlation the severity degree previously known. With these data, the training was performed an ANN through the neural network simulator BrNeural. During training, parameters such as number of severity levels and number of neurons of the hidden layer have changed. After training, was chosen network architecture that gave better results, with 78.86% accuracy for Resilient-propagation algorithm. This network was saved in an object and inserted into the application, ready to be used with new data. Thus, the application takes the soybean leaf picture and filters the acquired image. After this, it extracts the features and commands internally to the trained neural network, which analyzes and reports the severity. Still, it is optionally possible to see a georeferenced map of the property, with the severities identified by small colored squares, each representing a different index.
Segundo a Embrapa (2013), o Brasil é o segundo maior produtor de soja do mundo, atrás apenas nos Estados Unidos. Safra após safra, a produção e a área plantada do Brasil vem crescendo, entretanto, fatores climáticos e doenças da cultura vêm afetando as lavouras, impedindo um crescimento ainda maior, e causando perdas para os agricultores. A ferrugem asiática, causada pelo fungo Phakopsora pachyrhizi, é uma doença foliar, considerada uma das doenças de maior importância na atualidade, devido ao grande potencial de perdas. A ferrugem asiática pode ser confundida com outras doenças na soja, como o Crestamento Bacteriano, a Mancha Parda e a Pústula Bacteriana, devido às aparências visuais semelhantes. Deste modo, O presente estudo teve por objetivo desenvolver um aplicativo para dispositivos móveis que utilizam a plataforma Android, para realizar o reconhecimento automático dos índices de severidade da ferrugem asiática da soja, para auxiliar no diagnóstico precoce e por consequência, auxiliar na tomada de decisão quanto ao manejo e controle da doença. Para isto, foram utilizadas técnicas de Processamento Digital de Imagens (PDI) e Redes Neurais Artificiais (RNA). Primeiramente, foram coletadas aproximadamente 3 mil folhas de soja em campo, onde cerca de 2 mil foram aproveitadas. Então elas foram separadas por índices de severidade, fotografadas em ambiente controlado, e após isto foram processadas com o objetivo de eliminar ruídos e o fundo das imagens. A fase de filtragem do pré-processamento consistiu nos filtros da mediana, filtro Gaussiano, transformação para escala de cinza, detector de bordas Canny, dilatação, find e drawcontours, e por fim o recorte da folha. Após isto, foram extraídas as características de cor e textura das imagens, que foram as médias R, G e B, Variância também para os três canais R, G e B, Segundo Momento Angular, Entropia, Contraste, Homogeneidade, Correlação e por fim, o Grau de Severidade previamente sabido. Com estes dados, foi realizado o treinamento de uma RNA através do simulador de redes neurais BrNeural. Durante o treinamento, parâmetros como quantidade de níveis de severidade e quantidade de neurônios da camada oculta foram alterados. Após o treinamento, foi escolhida a arquitetura de rede que deu melhor resultado, com 78,86% de acerto para o algoritmo Resilient-propagation. Esta rede foi salva em um objeto e inserida no aplicativo, pronta para ser utilizada com dados novos. Assim, o aplicativo tira a foto da folha de soja e faz a filtragem da imagem adquirida. Após isto, extrai as características e manda internamente para a rede neural treinada, que analisa e informa a severidade. Ainda, opcionalmente é possível ver um mapa georreferenciado da propriedade, com as severidades identificadas por pequenos quadrados coloridos, representando cada um, um índice diferente.

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Tun, Myo. "Research and developments of Dirac video codec." Thesis, Brunel University, 2008. http://bura.brunel.ac.uk/handle/2438/7910.

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In digital video compression, apart from storage, successful transmission of the compressed video data over the bandwidth limited erroneous channels is another important issue. To enable a video codec for broadcasting application, it is required to implement the corresponding coding tools (e.g. error-resilient coding, rate control etc.). They are normally non-normative parts of a video codec and hence their specifications are not defined in the standard. In Dirac as well, the original codec is optimized for storage purpose only and so, several non-normative part of the encoding tools are still required in order to be able to use in other types of application. Being the "Research and Developments of the Dirac Video Codec" as the research title, phase I of the project is mainly focused on the error-resilient transmission over a noisy channel. The error-resilient coding method used here is a simple and low complex coding scheme which provides the error-resilient transmission of the compressed video bitstream of Dirac video encoder over the packet erasure wired network. The scheme combines source and channel coding approach where error-resilient source coding is achieved by data partitioning in the wavelet transformed domain and channel coding is achieved through the application of either Rate-Compatible Punctured Convolutional (RCPC) Code or Turbo Code (TC) using un-equal error protection between header plus MV and data. The scheme is designed mainly for the packet-erasure channel, i.e. targeted for the Internet broadcasting application. But, for a bandwidth limited channel, it is still required to limit the amount of bits generated from the encoder depending on the available bandwidth in addition to the error-resilient coding. So, in the 2nd phase of the project, a rate control algorithm is presented. The algorithm is based upon the Quality Factor (QF) optimization method where QF of the encoded video is adaptively changing in order to achieve average bitrate which is constant over each Group of Picture (GOP). A relation between the bitrate, R and the QF, which is called Rate-QF (R-QF) model is derived in order to estimate the optimum QF of the current encoding frame for a given target bitrate, R. In some applications like video conferencing, real-time encoding and decoding with minimum delay is crucial, but, the ability to do real-time encoding/decoding is largely determined by the complexity of the encoder/decoder. As we all know that motion estimation process inside the encoder is the most time consuming stage. So, reducing the complexity of the motion estimation stage will certainly give one step closer to the real-time application. So, as a partial contribution toward realtime application, in the final phase of the research, a fast Motion Estimation (ME) strategy is designed and implemented. It is the combination of modified adaptive search plus semi-hierarchical way of motion estimation. The same strategy was implemented in both Dirac and H.264 in order to investigate its performance on different codecs. Together with this fast ME strategy, a method which is called partial cost function calculation in order to further reduce down the computational load of the cost function calculation was presented. The calculation is based upon the pre-defined set of patterns which were chosen in such a way that they have as much maximum coverage as possible over the whole block. In summary, this research work has contributed to the error-resilient transmission of compressed bitstreams of Dirac video encoder over a bandwidth limited error prone channel. In addition to this, the final phase of the research has partially contributed toward the real-time application of the Dirac video codec by implementing a fast motion estimation strategy together with partial cost function calculation idea.

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Halbach, Till. "Error-robust coding and transformation of compressed hybered hybrid video streams for packet-switched wireless networks." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-136.

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This dissertation considers packet-switched wireless networks for transmission of variable-rate layered hybrid video streams. Target applications are video streaming and broadcasting services. The work can be divided into two main parts.

In the first part, a novel quality-scalable scheme based on coefficient refinement and encoder quality constraints is developed as a possible extension to the video coding standard H.264. After a technical introduction to the coding tools of H.264 with the main focus on error resilience features, various quality scalability schemes in previous research are reviewed. Based on this discussion, an encoder decoder framework is designed for an arbitrary number of quality layers, hereby also enabling region-of-interest coding. After that, the performance of the new system is exhaustively tested, showing that the bit rate increase typically encountered with scalable hybrid coding schemes is, for certain coding parameters, only small to moderate. The double- and triple-layer constellations of the framework are shown to perform superior to other systems.

The second part considers layered code streams as generated by the scheme of the first part. Various error propagation issues in hybrid streams are discussed, which leads to the definition of a decoder quality constraint and a segmentation of the code stream to transmit. A packetization scheme based on successive source rate consumption is drafted, followed by the formulation of the channel code rate optimization problem for an optimum assignment of available codes to the channel packets. Proper MSE-based error metrics are derived, incorporating the properties of the source signal, a terminate-on-error decoding strategy, error concealment, inter-packet dependencies, and the channel conditions. The Viterbi algorithm is presented as a low-complexity solution to the optimization problem, showing a great adaptivity of the joint source channel coding scheme to the channel conditions. An almost constant image qualiity is achieved, also in mismatch situations, while the overall channel code rate decreases only as little as necessary as the channel quality deteriorates. It is further shown that the variance of code distributions is only small, and that the codes are assigned irregularly to all channel packets.

A double-layer constellation of the framework clearly outperforms other schemes with a substantial margin.

Keywords — Digital lossy video compression, visual communication, variable bit rate (VBR), SNR scalability, layered image processing, quality layer, hybrid code stream, predictive coding, progressive bit stream, joint source channel coding, fidelity constraint, channel error robustness, resilience, concealment, packet-switched, mobile and wireless ATM, noisy transmission, packet loss, binary symmetric channel, streaming, broadcasting, satellite and radio links, H.264, MPEG-4 AVC, Viterbi, trellis, unequal error protection

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Ribeiro, Daniel de Sousa. "Resilience in Industry 4.0 Digital Infraestructures and Platforms." Master's thesis, 2021. https://hdl.handle.net/10216/135134.

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A indústria 4.0 consiste numa mudança de paradigma de produção automatizada para um conceito de produção inteligente, onde todos os ativos físicos estão conectados e podem interagir entre eles via protocolos de internet. Estes ativos são agora chamados de Sistemas Ciber-Físicos (CPS-Cyber-Physical Systems) e o sistema de produção passa a ser um sistema de produção ciber-fisico (CPPS). Estes sistemas comprometem tecnologias como IoT, produção baseada em Cloud e smart manufacturing, que são responsáveis por digitalizar os processos de produção e negócio. A crescente complexidade das aplicações dos sistemas ciber-físicos levam a maior flexibilidade na produção, permitindo a produção de lotes pequenos a custos baixos e melhorar a qualidade no que toca ao cumprimento dos requisitos do cliente. Contudo, também causam grande vulnerabilidade a disrupções durante os processos de produção. Então, os sistemas de produção devem ser resilientes a disrupções, pelo que devem ser tomadas decisões rapidamente para reduzir o seus impactos. Com sistemas de informação mais complexos, os CPS vão lidar com novas disrupções, resultando em consequências inesperadas. Por forma a estarem preparadas para os eventos descritos, as empresas devem procurar uma solução capaz de medir o impacto de disrupções nos processos, descobrir ações de mitigação adequadas e calcular o ganho em resiliência. As empresas que aderem ao paradigma da indústria 4.0 estão a migrar os seus sistemas de informação, inclusive sistemas de apoio a produção, para servidores em cloud. Esta mudança torna a produção mais ágil, mas ao mesmo tempo introduz novos problemas de comunicação e informação. A digitalização dos processos tornou o uso de planos de mitigação mais limitado e dependente de ferramentas digitais. Hoje em dia é importante a possibilidade de prever possíveis disrupções no sistema de produção e de informação, medir o seu impacto e criar uma base de dados com medidas de prevenção eficazes. Ciente desta necessidade, esta dissertação objetiva avaliar a eficácia de metodologias baseadas em simulação para medir o impacto de disrupções em sistemas de produção ciber-físicos e assim contribuir para a sua resiliência. Para tal, é apresentada uma metodologia cujo funcionamento está alinhado com um sistema de gestão de disrupções, e que é posteriormente testada num caso de estudo da indústria corticeira. Aqui, os resultados são avaliados baseados num modelo de simulação do sistema de produção descrito e do seu sistema de informação também.
We live in a world where companies are shifting toward the industry 4.0 paradigm. One of the pillars of Industry 4.0 (i4.0) is the digitalization of physical assets and manufacturing and business processes towards the Cyber-Physical Production Systems concept (CPPSs). CPPSs are distinguished by highly versatile production processes capable of adapting to the current market conditions and manufacturing a wide range of small-batch items. As a result of modern applications of cyber-physical production systems, modified frameworks, and more complex IT infrastructures, new types of disruption events may occur. In the case of process disruption, actions must be taken in a short time to minimize the impact on production systems. Hence, companies that adhere to i4.0 enabling technologies must protect themselves against these unexpected problems by introducing disruption management solutions. This dissertation introduces a simulation-based methodology capable of evaluating the impacts of disruption events and finding suitable response actions to increase resilience in Cyber-Physical Production Systems processes.

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Ribeiro, Daniel de Sousa. "Resilience in Industry 4.0 Digital Infraestructures and Platforms." Dissertação, 2021. https://hdl.handle.net/10216/135134.

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A indústria 4.0 consiste numa mudança de paradigma de produção automatizada para um conceito de produção inteligente, onde todos os ativos físicos estão conectados e podem interagir entre eles via protocolos de internet. Estes ativos são agora chamados de Sistemas Ciber-Físicos (CPS-Cyber-Physical Systems) e o sistema de produção passa a ser um sistema de produção ciber-fisico (CPPS). Estes sistemas comprometem tecnologias como IoT, produção baseada em Cloud e smart manufacturing, que são responsáveis por digitalizar os processos de produção e negócio. A crescente complexidade das aplicações dos sistemas ciber-físicos levam a maior flexibilidade na produção, permitindo a produção de lotes pequenos a custos baixos e melhorar a qualidade no que toca ao cumprimento dos requisitos do cliente. Contudo, também causam grande vulnerabilidade a disrupções durante os processos de produção. Então, os sistemas de produção devem ser resilientes a disrupções, pelo que devem ser tomadas decisões rapidamente para reduzir o seus impactos. Com sistemas de informação mais complexos, os CPS vão lidar com novas disrupções, resultando em consequências inesperadas. Por forma a estarem preparadas para os eventos descritos, as empresas devem procurar uma solução capaz de medir o impacto de disrupções nos processos, descobrir ações de mitigação adequadas e calcular o ganho em resiliência. As empresas que aderem ao paradigma da indústria 4.0 estão a migrar os seus sistemas de informação, inclusive sistemas de apoio a produção, para servidores em cloud. Esta mudança torna a produção mais ágil, mas ao mesmo tempo introduz novos problemas de comunicação e informação. A digitalização dos processos tornou o uso de planos de mitigação mais limitado e dependente de ferramentas digitais. Hoje em dia é importante a possibilidade de prever possíveis disrupções no sistema de produção e de informação, medir o seu impacto e criar uma base de dados com medidas de prevenção eficazes. Ciente desta necessidade, esta dissertação objetiva avaliar a eficácia de metodologias baseadas em simulação para medir o impacto de disrupções em sistemas de produção ciber-físicos e assim contribuir para a sua resiliência. Para tal, é apresentada uma metodologia cujo funcionamento está alinhado com um sistema de gestão de disrupções, e que é posteriormente testada num caso de estudo da indústria corticeira. Aqui, os resultados são avaliados baseados num modelo de simulação do sistema de produção descrito e do seu sistema de informação também.
We live in a world where companies are shifting toward the industry 4.0 paradigm. One of the pillars of Industry 4.0 (i4.0) is the digitalization of physical assets and manufacturing and business processes towards the Cyber-Physical Production Systems concept (CPPSs). CPPSs are distinguished by highly versatile production processes capable of adapting to the current market conditions and manufacturing a wide range of small-batch items. As a result of modern applications of cyber-physical production systems, modified frameworks, and more complex IT infrastructures, new types of disruption events may occur. In the case of process disruption, actions must be taken in a short time to minimize the impact on production systems. Hence, companies that adhere to i4.0 enabling technologies must protect themselves against these unexpected problems by introducing disruption management solutions. This dissertation introduces a simulation-based methodology capable of evaluating the impacts of disruption events and finding suitable response actions to increase resilience in Cyber-Physical Production Systems processes.

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Scholz, Anna. "Capabilities and consequences of supply chain resilience: the moderating role of digital technologies." Thesis, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-53890.

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Polk, Emily. "Transition network: Exploring intersections between culture, the climate crisis, and a digital network in a community - driven global social movement." 2013. https://scholarworks.umass.edu/dissertations/AAI3603139.

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The core aim of this research is to explore the communication processes of the Transition movement, a community-led global social movement as it adapted in a local context. The Transition movement facilitates community -led responses to the current global financial and climate crisis via the Transit ion Network, an online network that began in 2006, and is comprised of more than 2000 initiatives in 35 countries that have used the Transition model to start projects that use small scale solutions to achieve greater sustainability. This research uses qualitative ethnographic methods and a theoretical framework based on actor network theory to better understand how the movement's grand narratives of "climate change" and "peak oil" are communicated into local community-based stories, responses, and actions toward sustainability, and secondly, to analyze the multilayered communication processes that facilitate these actions toward sustainable social change. Transition projects address a wide range of issues, including reducing dependency on peak-oil, creating community based local economies, supporting sustainable food production and consumption, building efficient transportation, housing, and more diverse and inclusive education. The Transition model provides a participatory communication framework laid out in specific stages for communities to begin this process. The popularity of the model coincides with an increase in the interest in and use of the term "sustainability" by media, academics and policymakers around the world, and an increase in the global use of digital technology as a resource for information gathering and sharing. Thus this study situates itself at the intersections of a global environmental and economic crisis, the popularization of the term "sustainability," and an increasingly digitized a nd networked global society in order to better understand how social change is contextualized and facilitated in a local community via a global network. From the findings, I argue that although the model's rapid growth can be attributed, in part, to an appealing narrative that reframes more traditional environmental movement discourse into solutions-based community focused actions, the movement would do well to develop more organized communication processes around connecting with and recognizing other people and groups who share similar values and goals, and around defining and creating the space for consistent and efficient leaders. This study also reveals that members of Transition Amherst had mixed feelings about the group's success and this was attributed to a wide range of interpretations of the model and the purpose it serves, particularly in towns where the ideology of Transition has already, to some extent, been adopted.

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Marlyn, L. Bennett. "Digital Storytelling with First Nations Emerging Adults in Extensions of Care and Transitioning from Care in Manitoba." 2016. http://hdl.handle.net/1993/31252.

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This study investigated the experiences of emerging First Nations adults in extensions of care and transitioning out of care in Manitoba. Four research questions were explored in this study: 1) What do you remember about your time in care and what was your transitioning experience out of care or upon reaching 18 years of age? 2) What challenges, barriers or opportunities have you experienced since leaving care or turning 18? 3) How have you maintained the connection to family, community and culture since transitioning out of care? 4) Do you think you have reached adulthood? These questions were discussed through two digital storytelling workshops where over the course of five days participants developed and embedded individual responses to these questions into their own digital video. Follow up interviews were conducted with the participants to get feedback on their perspectives and evaluation about the digital storytelling workshops. Digital storytelling, through the art of combining oral tradition with digital technology, is a participatory, arts-based, learner-centered approach to generating knowledge. It involves using computer software to create a three to five minute video to illustrate a personal history. The findings suggest that Indigenous emerging adults in extensions of care and transitioning from care in Manitoba continue to experience difficulties on their journeys toward adulthood. However, the findings also suggest that the participants in this study are resilient despite the fact that they are dealing simultaneously with memories of being in care, negative peer pressures and problems in getting their basic needs met as they navigate life beyond their child welfare experiences. This study enhances the understanding of First Nations young peoples’ experiences in extensions of care and as they transition out of foster care, and contributes to the growing body of knowledge that utilizes digital storytelling as a contemporary method conducive to working with Indigenous emerging adult populations.
May 2016

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Rice, Matthew E. Burmester Mike. "Legally resilient signatures a middle-age approach to a digital age problem /." Diss., 2005. http://etd.lib.fsu.edu/theses/available/etd-04152005-124655.

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Thesis (M.S.)--Florida State University, 2005.
Advisor: Dr. Mike Burmester, Florida State University, College of Arts and Sciences, Dept. of Computer Science. Title and description from dissertation home page (viewed June 13, 2005). Document formatted into pages; contains viii, 35 pages. Includes bibliographical references.

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Lee, Cheng-En, and 李承恩. "A Cell-Based Compiler for Process Resilient Fractional-N All-Digital PLLs." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/hf95je.

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"Error resilient video coding over error prone networks." Thesis, 2009. http://library.cuhk.edu.hk/record=b6074970.

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In the first part, decoder based error concealment methods are discussed. An adaptive partition size (APS) temporal error concealment method is developed for H.264. We propose to use Weighted Double-Sided External Boundary Matching Error (WDS-EBME) to jointly measure the inter-MB boundary discontinuity, inter-partition boundary discontinuity and intra-partition block artifacts in the corrupted MB. By minimizing the WDS-EBME value of each partition, the best motion vectors of each candidate partition mode can be estimated, overall WDS-EBME of the MB concealed by each partition mode can then be evaluated and the best partition mode for the corrupted Macroblocks (MB) will be determined as the one with the smallest overall WDS-EBME. We also propose a progressive concealment order for the 4x4 partition mode.
In this thesis, techniques for efficient error resilient video coding are investigated. Three parts of the work are discussed in this thesis.
The last part of the thesis concerns the joint encoder-decoder error control method. A joint temporal error control method is proposed for H.264. It combines RDO-based macroblock (MB) classification at the encoder and adaptive partition size error concealment at the decoder. The encoder classifies the MBs by evaluating the sensitivity of the MBs as the RD cost between the concealment error and the bits needed for the additional motion information. Additional motion information such as the original motion vector or motion vector index can be transmitted for the error sensitive MBs. The decoder utilizes the additional motion information if any of these MBs get lost. Non-sensitive MBs and blocks are concealed by the APS method.
The second part of this thesis investigates encoder based error control techniques. Firstly, a VLC/FLC data partitioning method is proposed for MPEG-4. It disables intra AC prediction and groups appropriate fixed length coded (FLC) syntaxes in a video packet (or slice) together to form a new partition. With intra AC prediction disabled, errors occurring in these FLC syntaxes will not cause spatial error propagation. It essentially classifies the syntaxes into two categories according to whether that syntax will cause spatial error propagation when an error occurs. Secondly, a redundant macroblock strategy is proposed for H.264. MB Differential Mean Square Error (DMSE) is employed to evaluate the error sensitivity of MBs. The most sensitive MBs are transmitted separately in additional slices while coarsely quantized copies of the MBs are placed in the original slice. When working with chessboard style Flexible Macroblock reordering (FMO) and fixed length slice mode (FMO-slicing), the scheme performs well against packet loss errors with acceptable overhead and it is highly compatible with original H.264 bitstream. Thirdly, a joint optimal bit allocation and rate control scheme is proposed for H.264 with redundant slice. The optimum ratio between each primary and redundant picture pair is analytically deduced. Rate function and distortion model for both representations are developed, and a simple close-form solution is provided to achieve joint optimum bit allocation.
Video communication and other web-based video applications become popular in recent years. However, the transmission of the compressed video bit stream often suffers from imperfection of the communication channel, like path loss, multipath fading, co-channel interference, congestion, etc. Error resilient video coding techniques need to be employed to mitigate the channel errors, which include error concealment in the decoder, forward error correction in the encoder and joint encoder-decoder error control techniques.
Li, Jie.
Adviser: Ngan King Ngi.
Source: Dissertation Abstracts International, Volume: 73-01, Section: B, page: .
Thesis (Ph.D.)--Chinese University of Hong Kong, 2009.
Includes bibliographical references (leaves 137-146).
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [201-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract also in Chinese.

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Chang, Yu-Chuan, and 張育銓. "A Geometrically Resilient Digital Image Watermarking Scheme Based on SIFT and Extended Template Embedding." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/73765296473476670925.

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碩士
國立中央大學
資訊工程研究所
100
Synchronized watermark detection is an important issue. The embedded watermark may not be detected successfully if the image has undergone such geometrical transformations as rotation, cropping, scaling or even random bending. This research presents a feature-based still image watermarking approach. Scale-Invariant Feature Transform (SIFT) is first applied to locate the interest points, from which we form the invariant regions for watermark embedding. To resist geometrical transformations, the extended synchronization templates, which help to ensure that reasonably large invariant regions will be available for carrying the watermark payload and/or for increasing the confidence of watermark detection, will also be embedded. In the detection phase, after SIFT, the template is first determined locally by adjusting the related affine parameters of the grid to match with the possible hidden template signal so that the watermark can be retrieved afterwards. Experimental results show the feasibility of the proposed method.

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Liu, Wei-Chang, and 劉瑋昌. "Design for Indoor Wireless Digital Baseband Receiver at 60 GHz Band and Timing-Error Resilient Circuit." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/dssf7g.

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博士
國立交通大學
電子工程學系電子研究所
103
In this dissertation, we present three digital baseband receiver designs for 60 GHz band application. The baseband receivers can support SC and OFDM dual mode of IEEE 802.15.3c and IEEE 802.11ad. The dual-mode dual-standard digital baseband receiver is composed by all-digital synchronization, channel equalizer, high throughput radix-16 FFT and phase noise cancellation. In order to ease the clock rate, the modules of digital baseband are designed with 8X-parallelism without feedback tracking loop. The parallel data path is designed as feed-forward for the feasibility of deep pipelining to meet the 2.64 GHz sampling rate. From the hardware efficiency point of view, the hardware cost is reduced by operating at the SC/OFDM modes of the two IEEE standards within a unified hardware in each sub-module. Two baseband receivers are fabricated with 65 nm CMOS GP process and one baseband receiver is designed with 40 nm CMOS GP process. For the purpose of solving the significantly performance loss due to the PVT variation in advanced process with very high operating frequency, a novel timing error-resilient sequential circuit with successive, multi-stage time borrowing is proposed. The proposed TBMSFF (time borrowing master-slave flip-flop) has three types for different applications. The area overhead is only a AND gate or NAND gate compared to a conventional DFF. The timing error recovery is based on time borrowing. Therefore, no reply mechanism is required and is applicable to both feed-forward and feedback data paths. For the time borrowing of TBMSFF, there is no need of generating any clock or multi-phase clock. The proposed TBMSFF is verified with MAC (multiply-accumulate) and CORDIC (coordinate rotation digital computer) blocks. The verification result shows the proposed TBMSFF is able to survive from successive timing errors and compatible with feedback data path.

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"New to the State and New to Teaching: Creating Authentic Resilient Educators (C.A.R.E.) Utilizing Digital Narratives." Doctoral diss., 2015. http://hdl.handle.net/2286/R.I.29635.

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abstract: This action research study focused on the beginning teacher attrition issues plaguing schools today. Specifically, this project explored a way to support out-of-state beginning teachers, who are traditionally difficult to retain. While there is literature on teacher retention, the retention of out-of-state teachers has not been well examined. Maslow's hierarchy of needs theory and Bandura's self-efficacy theories provided a foundational understanding of this group's needs. This study utilized interactive support sessions for six out-of-state beginning teachers that had five face-to-face sessions and required the teachers to submit weekly reflections between sessions using an iPad and app that allowed teachers to design their reflections using digital images, words, and/or narration. These weekly digital reflections, mapping activities collected during the support sessions, a pre- and post-innovation questionnaire, and interviews provided insights on the impact of these supports, as well as changes that occurred in self-perceptions. The results of this study indicate the challenge and complexities of being an out-of-state beginning teacher. The data showed that the teachers must first have had their basic needs met before they could fully explore and settle into their new identities and role as the classroom teacher. The data also indicated that intentionally teaching these teachers strategies around resiliency, stress management, and self-advocacy was useful for navigating their first semester. The supportive community that developed within the group emerged as a significant finding, and showed the importance of support structures for new teachers, especially for those who are struggling with both a new job and new community.
Dissertation/Thesis
Doctoral Dissertation Leadership and Innovation 2015

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Latães, Ana Catarina Estima. "The effect of olivine in the tropical coral Montipora digitata: toxicological assessment and resilience to thermal stress." Master's thesis, 2021. http://hdl.handle.net/10773/30818.

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The future of coral reefs is already being shaped by the resilience, or lack of it, of different species to climate change. Corals are currently undergoing a major ecological threat as result of ocean warming and acidification and anthropogenic activities. Marine protected areas and reduced carbon emissions are certainly relevant although likely insufficient to preserve this ecosystem. Therefore, additional conservation strategies are required. Olivine weathering, proposed as a CO2 removal strategy, is expected to increase seawater alkalinity while consuming CO2 from the atmosphere. Although verified the potential of increase pH values and alkalinity, the impact on marine organisms and ecosystem is still to be understood. Our study aimed to evaluate olivine exposure effects on tropical coral Montipora digitata, assessing molecular biomarkers of oxidative stress and damage and metabolic profiles, as well as photosynthetic efficiency, coral growth, pH and dissolved oxygen variations. Firstly, our study assessed sub-lethal effects of different olivine concentrations, 6.00, 9.00, 13.50, 20.25, 30.38, 45.56, 68.35 and 102.5 mg L-1 under an acute experiment of 96h. Primary results did not show a general dose-response tendency, although photosynthetic efficiency was impaired for increasing concentrations. HSP70 levels and protein content decreased for higher concentrations, while lipid content showed higher values as well as pH and DO. A second experiment was performed assessing chronic exposure effects on M. digitata to a concentration of 20.25 mg L-1 of olivine sand, of which we can conclude that a long-term exposure to olivine facilitates M. digitata relative growth and photosynthetic efficiency as well as significantly higher pH values. M. digitata experienced moderate oxidative stress efficiently tackled by antioxidant enzymes and a higher relative growth rate through the expense of tissue lipid content, but no additional energy demands to maintain defence mechanisms or metabolic activity. Additionally, coral macrostructures were not affected by olivine exposure. The final stage of this study aimed to assess biological responses of the coral M. digitata to increase temperature (30 ºC) for 24h, while exposed to 20.25 mg L-1 of olivine sand. Besides, we evaluated if previous olivine exposure enhances coral resilience to rising temperatures. Overall, biological response of M. digitata, associated with antioxidant pathways and cellular energy allocation and consumption was not indicative of induced thermal stress. Photosynthetic efficiency exhibited significantly higher values when exposed to olivine at 30 ºC, although being impaired in both treatments at the higher temperature. Therefore, we cannot conclude that olivine exposure enhances resilience mechanisms in the coral M. digitata whilst abnormal temperatures.
O futuro dos recifes de coral está a ser moldado pela resiliência, ou falta dela, de diferentes espécies às alterações climáticas. Os corais são organismos marinhos sob uma grande ameaça ecológica como resultado do aquecimento e acidificação dos oceanos e das atividades antropogénicas. As áreas marinhas protegidas e a redução das emissões de carbono são certamente relevantes, embora provavelmente insuficientes para a preservação deste ecossistema. Assim, estratégias adicionais de conservação são necessárias. A desagregação de minerais como a olivina, proposta como uma estratégia de remoção de CO2, tem o potencial de aumentar a alcalinidade da água do mar enquanto consome CO2 da atmosfera. Embora verificado o potencial do aumento de valores de pH e alcalinidade, o impacte em organismos marinhos e no seu ecossistema, ainda não foi avaliado. O presente estudo teve como objetivo avaliar, pela primeira vez, os efeitos da exposição do mineral olivina no coral tropical Montipora digitata, avaliando biomarcadores moleculares de stresse e dano oxidativo e perfis metabólicos, bem como a eficiência fotossintética, crescimento do coral e variações de pH. Em primeiro lugar, o nosso estudo avaliou os efeitos sub-letais de diferentes concentrações de olivina, 6,00, 9,00, 13,50, 20,25, 30,38, 45,56, 68,35 e 102,5 mg L-1 durante uma exposição aguda de 96 h. Os resultados inicias não revelaram tendência geral de concentração-resposta, embora a eficiência fotossintética tenha sido menor em concentrações crescentes. Os níveis de HSP70 e o teor de proteína diminuíram em concentrações mais elevadas, enquanto o teor de lípidos apresentou valores superiores, assim como o pH e o oxigénio dissolvido. Um segundo ensaio foi realizado avaliando os efeitos da exposição crónica no coral M. digitata a uma concentração de 20,25 mg L-1 de olivina, do qual podemos concluir que a exposição prolongada a olivina facilitou o crescimento relativo de M. digitata e a sua eficiência fotossintética, contribuindo também para a manutenção de valores de pH significativamente mais elevados. M. digitata demonstrou stresse oxidativo moderado, eficientemente combatido pelas defesas antioxidantes, assim como uma maior taxa de crescimento relativo por intermédio de um consumo do conteúdo lipídico do tecido do coral, apesar de não demonstrar necessidade adicional de energia para manter os mecanismos de defesa ou atividade metabólica. Adicionalmente, as macroestruturas dos corais não foram afetadas pela exposição a olivina. A etapa final deste estudo teve como objetivo avaliar as respostas biológicas do coral M. digitata ao aumento da temperatura (30 ºC) em 24h, quando exposto a 20,25 mg L-1 de olivina. Além disso, avaliamos se a exposição anterior à olivina aumenta a resiliência dos corais ao aumento da temperatura. No geral, a resposta biológica de M. digitata, associada às vias antioxidantes, alocação celular de energia e consumo energético não foi indicativa de indução de stresse térmico, do qual não podemos concluir que a exposição ao mineral olivina aumente os mecanismos de resiliência no coral M. digitata quando este experiencia temperaturas anormais.
Mestrado em Biologia Aplicada

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Dissertations / Theses on the topic 'Digital Resilience'

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