Despite the developmental and clinical importance of body image during the pre-adolescent and adolescent years, there remains a dearth of information on the body image experiences of immigrant children and adolescents. This thesis represents a purposeful attempt to examine body image experiences among immigrant and ethnic minority children and adolescents in Canada and the United States (US). Specifically, the thesis integrates multiple methods (scoping reviews, qualitative interpretive description, quantitative multi-level modeling) and samples (clinical and population-based samples) to systematically contribute to the academic literature focusing on body image experiences among immigrant and ethnic minority children and adolescents in Canada and the US. Consisting of four conceptually related studies, this thesis makes the following methodological and conceptual contributions to epidemiological and clinical research and practice. First, the results from all four studies point to the need to develop standardized approaches for identifying and classifying immigrant and ethnic-minority children and adolescents. This will substantially increase the field’s ability to systematically characterize the nature and magnitude of body image dissatisfaction, body image distortion, and their associated outcomes among immigrant and ethnic minority children and adolescents. In addition, this systematic classification has the potential to inform the development or adaptation of universal and targeted preventative intervention strategies. Second, Study’s 1 and 2 demonstrate a clear need to further examine the constructs and experiences of acculturation and acculturative stress in relation to the body image experiences of immigrant and ethnic minority children and adolescents. The literature is unclear with respect to whether or not immigrant adolescents’ adoption of the values, behaviours and ideals of the Canadian or US culture increases their risk for body image concerns. On the other hand, we are also unclear as to whether or not immigrant adolescents’ retaining of the values, behaviours and ideals of their culture of origin may offer protection from poor body image experiences. Similarly, we are unclear about whether—and to what extent—stress as a result of adolescents’ acculturative experiences (i.e. acculturative stress) influence the onset or pervasiveness of body image concerns. Greater understanding about these constructs and processes and the extent to which they are implicated in the body image experiences among immigrant children and adolescents has the potential to inform culturally competent and targeted intervention approaches. Results from Study 3 indicate that immigrant adolescents have body image and appearance-related concerns that extend beyond what has typically been found among non-immigrant adolescents. More specifically, immigrant adolescents are concerned about the appearance of their skin (texture, complexion), their hair, their teeth, as well as other bodily features. It would be prudent for future researchers and clinicians to consider this information in relation to measuring, classifying and addressing body image dissatisfaction among immigrant adolescents. Finally, Study 4 demonstrates that females and first generation immigrants with body image dissatisfaction are at significantly elevated risk for body image distortion. This suggests that the assessment and intervention for body image dissatisfaction—particularly among females—soon after the migratory experience may play an important role in reducing body image distortion experiences. Taken together, the findings of this thesis strengthen the body image field by demonstrating that there are several unique aspects about being an immigrant that can influence adolescents’ body image experiences; and therefore, should be considered from a conceptual and methodological standpoint in future research and implementation of body image interventions. / Dissertation / Doctor of Philosophy (PhD) / Body image dissatisfaction and body image distortion have been linked to serious psychological outcomes, including depression and eating disorders. Yet, we know very little about the nature of these experiences among immigrant and ethnic minority children and adolescents. This thesis uses qualitative and quantitative methods, as well as general population and clinical samples to investigate body image dissatisfaction and body image distortion among immigrant and ethnic minority children and adolescents in Canada and the United States. Results provide important information that can inform the development of preventative interventions targeting body image dissatisfaction and body image distortion among immigrant and non-immigrant children and adolescents.

Around one million tonne of food is annually wasted in Sweden, of which 100,000 tonne of surplus foodis wasted in the retail sector. Even if redistribution of surplus food is the second most preferable optionto reduce food waste according to the food waste hierarchy, only 5% of surplus food in retail is donated.At the same time, food insecurity is a global as well as a Swedish concern. In 2017, 6% of the Swedishpopulation had a low-income standard, and food banks are currently reporting an increasing demand forfood support. The goal of the study was to investigate surplus food donations from grocery stores tofood banks as an approach to address the paradox of food waste and food insecurity. It was done byidentifying challenges and potential lock-in factors, and by analysing practices and success factors toidentify potential best-practices. The study was a qualitative case study and used the sustainabilitytransition framework ‘multi-level perspective’ (MLP) for analysis. The study took part in a collaborationproject to produce a handbook for surplus food donations in retail, which aims to guide actors in retailhow to reduce avoidable food waste by increasing donations. The results showed that there are some basic conditions that are needed for surplus food donations totake place in a safe way. These can be fulfilled in diverse ways, which have been analysed together withsuccess factors and learnings from the literature to give examples of ‘good enough’ practices and bestpractises. This division of ‘good enough and ‘best’ was made to address that small, volunteer-led foodbanks and larger, more experienced ones have quite different opportunities and challenges. Grocerystores also seem to face various practical, economic, and managerial challenges to donating their surplus.The analysis of the challenges showed some potential lock-in factors that contribute to obstructingsurplus food donations to be an integrated part of the food regime. These lock-in factors are mainlyrelated to the devaluation of ecological and social costs of food waste and the low political priority,thereby sustaining a lack of funding, and a ‘waste as a resource’-thinking. Even if there are severalpotential lock-ins that might need to be ‘unlocked’ for surplus food donations to be a part of a radicaltransition to a more sustainable food system, there are still several of the ‘good enough’- and bestpractices that can be implemented to incrementally improve the resource efficiency of the current foodsystem. Surplus food donations may, however, be a key component in the transition towards asustainable food system. / Omkring en miljon ton mat slängs årligen i Sverige, varav 100 000 ton överskottsmat slängs idetaljhandeln. Trots att omfördelning av överskottsmat rankas som det näst bästa alternativet för attminska matsvinnet enligt resurshierarkin för livsmedel, doneras endast 5 % av överskottsmaten idetaljhandeln. Samtidigt är matfattigdom såväl ett globalt som svenskt problem, 2017 hade 6 % av densvenska befolkningen en låg inkomststandard, och livsmedelsbanker rapporterar om en ökandeefterfrågan på mathjälp. Målet med studien var att undersöka donationer av överskottsmat frånlivsmedelsbutiker till matbanker som ett tillvägagångssätt för att minska matsvinn samt matfattigdom.Det utfördes genom att identifiera utmaningar och potentiella inlåsningsfaktorer relaterade till dessa,och genom att analysera praxis och framgångsfaktorer för att identifiera bästa praxis. Studien var enkvalitativ fallstudie och för en bredare analys av strävan mot ett mer hållbart livsmedelssystem såanvändes ramverket "multi-level perspective" (MLP). Studien är en del av ett Vinnovafinansieratsamarbetsprojekt för att ta fram en handbok för livsmedelsdonationer i detaljhandeln, som syftar till attvägleda aktörer inom detaljhandeln hur de kan minska matsvinnet genom ökade donationer av överskott. Resultaten visade att det finns vissa grundläggande förutsättningar som generellt sett behöver uppfyllasför att donationer av överskottsmat ska fungera. Dessa kan uppfyllas på olika sätt, dessatillvägagångssätt har analyserats tillsammans med framgångsfaktorer och lärdomar från litteraturen föratt ge exempel på "bra" praxis och bästa praxis. Denna uppdelning gjordes för att det framkom attmindre, volontärledda matbanker och större, mer erfarna matbanker har olika möjligheter ochutmaningar. Livsmedelsbutiker möter också olika praktiska, ekonomiska och administrativa utmaningarnär det gäller att donera sitt överskott. Analysen av utmaningarna visade några potentiellainlåsningsfaktorer som bidrar till att hindra donationer av överskottsmat från att vara en integrerad del iden nuvarande livsmedels-”regimen”. Dessa inlåsningsfaktorer är främst relaterade till att ekologiskaoch sociala kostnader för matsvinn ofta bortses ifrån, och den låga prioriteringen på den politiskadagordningen. Därmed kvarstår brist på finansiering och ett "avfall som en resurs"-tänk. Även om detfinns flera potentiella inlåsningar som kan behöva "låsas upp" för att donationer av överskottsmat skavara en del av en radikal omställning till ett mer hållbart livsmedelssystem, så finns det även flera bra-och bästa praxis som kan genomföras ändå, för att stegvis förbättra resurseffektiviteten i det nuvarandelivsmedelssystemet. Donation av överskottsmat kan dock vara en nyckelkomponent i omställningen tillett hållbart livsmedelssystem.

Ce mémoire aborde l’inclusion des personnes issues de l’immigration dans le tissu social municipal de la Ville de Sherbrooke, offrant une analyse de l’action municipale déployée à partir du point de vue des personnes concernées. À partir du terrain ethnographique effectué dans la Ville de Sherbrooke visant à observer l’interculturel qui y est déployé, des perceptions de plusieurs concepts sont mises de l’avant – par exemple : l’appartenance, l’administration municipale et ce qui constitue la diversité. Pour se faire, ce mémoire débute avec une vue d’ensemble du projet de recherche et installe les bases théoriques, conceptuelles et méthodologiques nécessaires à l’approfondissement des enjeux soulevés. L’entrée en la matière est poursuivie alors que se décline le contexte ethnographique dans lequel s’insère la problématique étudiée, tout en portant une attention aux dynamiques multiniveaux qui se déclinent à l’échelle du Canada, du Québec, et de la Ville de Sherbrooke. Des données sur la Ville de Sherbrooke ainsi qu’une part de l’action municipale déployée pour l’inclusion de la diversité y figurent. L’entrée dans le vif du sujet débute ensuite avec la présentation des données issues du projet de recherche International Intercultural Cities Comparative Study (IICCS), offrant un portrait du point de vue administratif sherbrookois quant aux relations interculturelles et à la diversité. Dans la même trame, sont subséquemment présentées les données récoltées auprès de résidents sherbrookois issus de l’immigration, qui ont participé à des groupes de discussion portant sur leur perception de l’inclusion de la diversité à Sherbrooke. Enfin, une discussion porte sur les données issues des groupes de discussion des fonctionnaires et des Sherbrookois issus de l’immigration. Cette discussion se veut une réflexion sur l’inclusion des personnes issues de l’immigration dans le tissu social sherbrookois et abordant les écarts de perception des différents acteurs. Finalement, les points saillants du projet de recherche et quelques constats finaux sont mis de l’avant, et la boucle sera bouclée en soulevant d’éventuelles pistes de réflexion. / This dissertation addresses the inclusion of people of immigrant background in the municipal social fabric of the City of Sherbrooke, offering an analysis of municipal action deployed from the perspective of the people concerned. Based on ethnographic fieldwork carried out in the City of Sherbrooke to observe interculturality in action, perceptions of several concepts are put forward - for example: belonging, municipal administration and what constitutes diversity. To this end, this dissertation is divided into five chapters. It begins with an overview of the research project, laying the theoretical, conceptual and methodological foundations required to explore the issues raised. The introduction to the subject is followed by a description of the ethnographic context in which the issue under study is embedded, with particular attention to the multi-level dynamics at play in Canada, Quebec and the City of Sherbrooke. Data on the City of Sherbrooke are included, as well as an overview of municipal initiatives undertaken in favour of inclusiveness and diversity. This is followed by a presentation of data from the International Intercultural Cities Comparative Study (IICCS) research project, providing a snapshot of Sherbrooke's administrative perspective on intercultural relations and diversity. This is followed by a presentation of data gathered from Sherbrooke residents of immigrant background, who took part in focus groups on their perceptions of diversity inclusion in Sherbrooke. Lastly, a discussion focuses on the findings of the focus groups with municipal representatives and residents. This discussion is intended as a reflection on the inclusion of people of immigrant background in Sherbrooke's social web, and address gaps in the perceptions of the various players. To conclude, the highlights of the research project and some final findings are put forward, and we come full circle by raising possible avenues for further reflection.

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This thesis seeks to explore the importance of sustainability within start-up organisations and investigate the sustainability transition within selected ventures. The research conducted applies a multiple case study design, combined with a literature review to answer the research question: ‘How Important is Sustainability for Start-ups?’. Six case studies are conducted from various industries, in order to obtain a purposive sample. The sample comprises start-ups that are technology focused, of a size below ten people and located in Stockholm, Sweden. Within this investigation, the concept of sustainability is defined through the triple bottom line approach; social, environmental, and economic, and supported by the 17 Sustainable Development Goals developed by the United Nations. Further concepts of Social Economy are applied, while the basis of the research questionnaire is the Social Economy Canvas. Moreover, the Multi-Level Perspective theoretical framework is applied to provide structure and support to the developed theories, placing sustainability within a broader perspective. As a result of the data collection and analysis, the following findings are presented. Firstly, digital start-ups struggle to have an impact on environmental sustainability when not working directly within this area. Secondly, in the ideation stages, start-ups have the intention of becoming sustainable according to the triple bottom line. However, when start-ups evolve, their sustainability goals may come into conflict with other factors that add layers of complexity in decision making. Thirdly, it is evidenced that a sustainability transition occurs in the observed case studies, as start-ups adopt more sustainable business practices and entrepreneurs are inspired to pursue new businesses or sustainability-oriented business models. Lastly, Sweden proves itself as a sustainability enabler, offering significant sustainability advantages to organisations based in Sweden. / Denna avhandling undersöker vikten av hållbarhet inom nystartade företag och undersöker hållbarhetsövergången inom utvalda företag. Den genomförda forskningen tillämpar flera fallstudier i kombination med en litteraturöversikt för att besvara forskningsfrågan: "Hur viktigt är hållbarhet för start-ups?" Sex fallstudier har genomförts från olika branscher för att få till en ändamålsenlig provstorlek. Urvalet omfattar nystartade företag som är teknologifokuserade, av en storlek under tio personer och som ligger i Stockholm, Sverige. Inom denna utredning definieras begreppet hållbarhet genom den tredubbla strategin: social, miljömässig och ekonomisk, och stöttas av de 17 hållbarhetsmål som utvecklats av FN. Ytterligare begrepp om social ekonomi tillämpas, medan grunden för forskningsundersökningen är en socialekonomisk canvas. Dessutom tillämpas det teoretiska ramverket på flera nivåer för att ge struktur och stöd till de utvecklade teorierna och placera hållbarhet i ett bredare perspektiv. Som ett resultat av datainsamlingen och analysen presenteras följande resultat. För det första har digitala nystartade företag svårigheter att påverka miljöns hållbarhet när de inte arbetar direkt inom detta område. För det andra, i ideationsstadierna har nyetablerade företag avsikter att bli hållbara enligt ”triple bottom line”-modellen. Men när nystartade företag utvecklas kan deras hållbarhetsmål komma i konflikt med andra faktorer som komplicerar beslutsfattandet. För det tredje framgår det att en hållbarhetsövergång inträffar i de observerade fallstudierna när nystartade företag använder mer hållbara affärsmetoder och entreprenörer inspireras att bedriva nya företag eller hållbarhetsinriktade affärsmodeller. Slutligen visar Sverige sig vara en hållbarhetsfaktor som erbjuder betydande hållbarhetsfördelar till organisationer med bas i Sverige.

This study concerns investigating an industry, i.e. system, which is subject to radical technological changes, and how actors within the system can enhance their innovation processes and manage technological shifts efficiently. The specific context in which these processes are investigated is the compliance departments within the Swedish insurance industry. The Swedish insurance industry constitutes a central pillar in the national economy, which is why the stability of the industry must be ensured. As a result, the insurance industry is subject to various regulations and the scope and amount of regulations have increased since the global financial crisis in 2008. In other words, the regulatory burden has increased while the risks of non-compliance pose a threat to incumbents' competitive position. In order to meet the pressure of increased regulatory burden as well as leverage on the pressure of digitalization, Regulatory Technology (RegTech) has been identified as a key focus area for Swedish insurance companies in enhancing their operational efficiency as well as reduce the risk of non-compliance. Consequently, the purpose of this study is to identify system challenges to adoption of RegTech as well as system enablers which suggest how the related innovation processes can be facilitated. The empirical data in this study consists of ten in-depth interviews with representatives from Swedish insurance companies as well as knowledge providers within RegTech. The study reveals 38 system challenges and 38 system enablers to adoption of RegTech in various dimensions related to market forces, organizational factors and product development aspects, to mention a few. The most commonly raised system challenges are based on that RegTech is related to cost-reduction and thus has limited impact on revenue-generation as well as the fact that the insurance industry is characterized for being conservative and rigid, to name a few. Two examples of commonly mentioned system enablers are increasing regulatory pressure which leads to uneconomical and resource-intensive compliance operations with an increasingly high risk of non-compliance, as well as that younger insurance companies have to deploy RegTech in order to survive in the long run. The results from the study are presented at landscape-, regime- and niche-level according to the theoretical frameworks of Multi-level Perspective of Sociotechnical Systems and Absorptive Capacity in conjunction with a relevant theoretical framework within compliance management, denoted the Efficient-investment-risk model. / Denna studie inkluderar undersökandet av en industri, med andra ord ett system, som genomgår radikala tekniska förändringar samt hur aktörerna inom detta system kan förbättra sina innovationsprocesser och hantera teknikskiften mer effektivt. Det specifika fallet i vilket dessa processer undersöks i är complianceavdelningar hos svenska försäkringsbolag. Den svenska försäkringsbranschen utgör en central pelare i den nationella ekonomin, vilket är anledningen till varför industrins stabilitet behöver värnas. På grund av detta omfattas industrin av en mängd olika regelverk och vidare har omfattningen samt antalet regelverk ökat sedan den globala finanskrisen 2008. Med andra ord har den regulatoriska bördan ökat medan risken av icke-compliance fortsätter att utgöra ett hot mot försäkringsbolagens marknadspositioner. För att möta det ökade regulatoriska trycket och dessutom dra fördel av trycket från digitaliseringsvågen har Regulatory Technology (RegTech) identifieras som ett nyckelområde för svenska försäkringsbolag i deras strategi att förbättra operationell effektivitet samt bibehålla låg risk av non-compliance. Följaktligen är syftet med denna studie att identifiera systemutmaningar inom anammandet av RegTech samt systemmöjliggöranden som kan underlätta innovationsprocesser relaterat till anammandet av RegTech. Den empiriska datan i studien består av tio djupgående intervjuer med representanter från svenska försäkringsbolag samt RegTech-experter som utgörs av bland annat konsultbolag samt teknikföretag. Studien avslöjar 38 systemutmaningar samt 38 systemmöjliggörare relaterat till anammandet av RegTech i en bredd av olika dimensioner så som marknadskrafter, organisatoriska faktorer, produktutveckling m.m. Bland de vanligast identifierade systemutmaningarna presenteras faktumet att RegTech är begränsat till kostnadsreducering och därmed inte har en direkt positiv inverkan på intäktsdrivandet. En annan vanlig systemutmaning är faktumet att försäkringsbranschen är konservativ och stel i dess natur. Ett exempel på systemmöjliggörare å andra sidan är trenden att det regulatoriska trycket ökar, vilket leder till att complianceprocesser behöver effektiviseras för att försäkringsbolag ska kunna bibehålla konkurrenskraft samt att konsekvenserna av non-compliance blir allvarligare. En annan möjliggörande faktor inom systemet är att unga försäkringsbolag är i stort behov av att anamma RegTech för att överleva ekonomiskt i det långa loppet. Studiens resultat är presenterat på landskap, regim samt nichenivå i enlighet med teorin multi-nivåperspektivet av sociotekniska system samt i enlighet med teoriområdet absorptionsförmåga. Utöver detta har även en teori inom compliance management vid namn Effektiv-investering-riskmodellen tillämpats.

The traditional electricity market, holding centralized authority over consumers, is no longer adequate seeing a shift towards a more electrified, decentralized, and digitalized society. Increased energy prices, raising concerns about climate change, and tightening governmental regulations have resulted in that an extensive diffusion of renewable energy sources has evolved. This development is expected to change the structure of the sector, despite that an appropriate market design that can deal with these remains to be identified. The purpose of this study was to investigate how a business model of a digital platform, managing energy trading within a local community could be designed. This study contributes to a new dimension of energy transitions within a Multi-Level Perspective by studying a particular field of the transition in terms of flexibility market platforms. The rising need for flexible solutions, making the consumer a prosumer, and enabling shared energy through a digital platform involves uncertainty and challenges, where a suitable business model linking new technology to the emerging market needs to be defined. Despite the novelty of the research field of local energy markets, the aim of investigating business model designs for a local energy market platform has been reached through an exploratory case study and integration of theories from several fields. This study makes an analytical contribution of investigating five pioneering projects, all developing digital platforms enabling integration of flexibility into the electricity market. This further contributes to the design-implementation gap of theories when developing a local energy market, by suggesting the most vital parameters to take into account. Based on the findings, a suggestion on a suitable business model design and a corresponding market design was developed. The main objective of the proposed market design is to serve as a basis to bring forward flexibility available from prosumers and their controllable demand and supply arrangement, including renewable energy technology generation and storage devices. The intention is to maintain a balanced and transparent distribution network at the lowest possible costs, while, at the same time functioning as reserve storage towards the main grid, reducing the risk of capacity shortage. Additional insights were raised that can be helpful in the evaluation of utilizing flexibility energy assets before making grid investments, following the recently presented recommendation of the EU's Clean Energy package. / Den traditionella elmarknaden, karaktäriserad av en centraliserad styrning, är inte längre hållbar då utvecklingen av marknaden går mot ett allt mer elektrifierat, decentraliserat och digitaliserat samhälle. Ökande energipriser, växande oro för klimatfrågor tillsammans med en allt snävare reglering av energimarknaden har resulterat i en omfattande ökning av förnybara energikällor. Denna utveckling förväntas förändra sektorns struktur, där en lämplig marknadsdesign som kan hantera detta återstår att identifiera. Syftet med denna studie var att undersöka hur en affärsmodell för en digital plattform, anpassad för att hantera lokal energidelning, kan utformas. Denna studie bidrar till en ny dimension av energitransformationen från ett multi-nivå-perspektiv genom att studera ett särskilt område av övergången i form av flexibla marknadsplattformar. Det ökande behovet av flexibla lösningar, där konsumenter blir prosumenter och energi delas lokalt via digitala plattform innebär osäkerheter och utmaningar. En lämplig affärsmodell som kan anknyta de nya tekniska lösningarna som krävs till lokala energimarknader bör därav definieras. Trots att forskningsområdet som berör lokala energimarknader kan anses relativt nytt och delvis outforskat, har målet att undersöka affärsmodellkoncept för en lokal energimarknadsplattform uppnåtts genom en fallstudie och iterationer av teorier inom flertalet områden. Denna studie bidrar med en analytisk undersökning av fem innovativa projekt som alla utvecklar digitala plattformar för att möjliggöra integrering av flexibilitet till elmarknaden. Detta bidrar även till det kunskapsgap som har identifierats mellan design och implementering fas vid utvecklandet av lokala energimarknader, genom föreslagna parameter som anses grundläggande och som bör tas hänsyn till. Baserat på resultatet presenterades ett förslag på en lämplig design för affärsmodell samt en tillhörande marknadsdesign. Huvudsyftet med den föreslagna marknadsdesignen är att utgöra en grund för gynnandet av en mer flexibel elektricitet hantering. Detta möjliggörs genom introduktionen av prosumenter till marknaden, där allt mer elektricitet produceras från förnybara källor och där konsumtion samt produktion regleras med hjälp av integrerade lagringsenheter. Målet är att upprätthålla ett balanserat och transparent distributionsnät till lägsta möjliga kostnad, medan marknaden även fungerar som ett reservlager mot kraftnätet, vilket minskar risken för kapacitetsbrist runt om i Sverige. Ytterligare insikter från denna studie påvisar hur de befintliga energitillgångarna kan utnyttjas på ett mer flexibelt och effektivt sätt, vilka stöds av de nyligen presenterade rekommendationerna från EU:s Clean Energy-paket.

In order to mitigate climate change, human activity needs to be decarbonised through a phase-out of fossil fuels, replaced by renewable energy sources. Here, sustainable business models can play an important role through connecting niche renewable technologies to the wider system and thereby allowing them to diffuse. Alternative business models towards the traditional centralised utility model have emerged, but remain poorly developed, and understood, especially their impact on transition dynamics over time. Therefore, this study combines business model research with the multi-level perspective on socio-technical transitions, in order to investigate how emerging sustainable business models in Germany co-evolve with the country’s energy system over time. The three studied business models are tenant electricity, community microgrid and virtual power plant. To this end, the study applied a qualitative research approach, involving an interview, survey and document review in order assess with which transition pathways, based on the multi-level perspective, the three studied business models share most characteristics with. The results suggest that community microgrid currently follows a substitution pathway, in which old regime structures are replaced over time. The business model of tenant electricity is still stuck in its niche, but under adjusting regulatory structures expected to follow a transformative pathway with minor regime adjustments, while the basic regime architecture remains unchanged. Lastly, virtual power plants as a symbiotic business model shares most characteristics with a reconfiguration pathway, in which it triggers internal change and over time can result in major structural reconfigurations. These results underline that not only the type of employed technology plays a crucial role, but also how it is made available to society in form of business models. Further, the alignment with different transitional pathways provides a more nuanced perspective on how different business model types co-relate and impact transition dynamics and thereby provides a basis for future discussions around how a sustainable energy transition can be steered towards a more democratic and inclusive energy system.

A DC power distribution system (PDS) of a transport aircraft was modeled and analyzed using MATLAB/Simulink software. The multi-level modeling concept was used as a modeling approach, which assumes modeling subsystem of the PDS at three different levels of complexity. The subsystem models were implemented in Simulink and combined into the whole PDS model according to certain interconnection rules. Effective modeling of different scenarios of operation was achieved by mixing subsystem models of different levels in one PDS model. Linearized models were obtained from the nonlinear PDS model for stability analysis and control design. The PDS model was used to examine the system stability and the DC bus power quality under bidirectional power flow conditions. Small-signal analysis techniques were employed to study stability issues resulting from subsystem interactions. The DC bus stability diagram was proposed for predicting stability of the PDS with different types of loads without performing an actual stability test based on regular stability analysis tools. Certain PDS configurations and operational scenarios leading to instability were identified. An analysis of energy transfer in the PDS showed that a large energy storage capacitor in the input filter of a flight control actuator is effective for reduction of the DC bus voltage disturbances produced by regenerative action of the actuator. However, energy storage capacitors do not provide energy savings in the PDS and do not increase its overall efficiency. / Master of Science