Wave power is a renewable energy source with great potential, which is why there are more than a hundred ongoing wave power projects around the world. At the Division of Electricity, Uppsala University, a point-absorber type wave energy converter (WEC) has been proposed and developed. The WEC consists of a linear synchronous generator placed on the seabed, connected to a buoy floating on the surface. Power is absorbed by heave motion of the buoy, and converted into electric energy by the generator. The point-absorber WEC must be physically much smaller than the wavelength of the incoming waves, and can therefore not be scaled to very high power levels. Instead, the total power output is boosted by increasing the number of WECs, connecting them in wave power farms. To transfer the electric energy to the grid, an intermediate marine substation is proposed, where an AC/DC/AC conversion step is performed. Within this PhD-work, a full-scale offshore marine substation has been designed, constructed and experimentally evaluated. The substation is rated for grid-connection of seven WECs to the local 1kV-grid, and is placed on the seabed 3km off the coast at a depth of 25m. Various aspects of the substation design have been considered, including the mechanical and electrical systems, the WEC electrical interface, offshore operations and the automatic grid connection control system. A tap change circuit and different multilevel topologies have also been proposed. This dissertation has an experimental approach, validating a major part of the work with lab results. The final substation electrical circuit has been tested at rated grid voltage with a fluctuating input power source. The efficiency has been measured and the implemented functions are verified. Offshore operations have been successfully carried out and offshore wave farm data is expected in the nearby future.

With reliable models to forecast travel demand, traffic planners and decision-makers can be assisted in choosing the best solutions to obtain traffic performance goals. Practitioners have traditionally been relying on infrequent, costly and respondent pressurized travel surveys as their main source of data for these models. The drawbacks of the data collection method highlight a need to search for alternative sources of data used for the purpose. One such source is public transport “tap-in” data. This thesis executed a case study with the target of improving the travel demand model of Norrköping via public transport data. An algorithm that estimates the alighting station of travellers was applied to a data set provided by the public transport operator of the city. By allocating the OD-demand from stations to the traffic analysis zones used in the model a straightforward integration method using the tap-in estimate as a reference matrix could be used. The target with the method was to redistribute the demand in such a way that the public transport demand approached the tap-in estimate but that the total demand for all modes for the OD-pair remained unchanged. The results gave some indication that the integration of tap-in data improved the model performance from the perspective of public transports. In a regression analysis comparing the number of entries per station the integration of tap-in data increased the correlation coefficient from 0,845 to 0,864. Further was the performance for other transport modes seemingly not worsened by the integration of tap-in data. Finding an allocation procedure that was generic but still accurate proved complex. Further were drawbacks with the integration procedure highlighted where the method executed affected the results of the model, not its behaviour. The consequence of this is that, though the model might be an accurate representation of the current state of traffic, it is difficult to execute the same procedure when investigating future states. Still, the thesis stressed some of the potential for public transport data in modelling contexts, where the role of the data, given the procedure executed, still is of complementary character to travel surveys.

Submitted by Maike Costa (maiksebas@gmail.com) on 2017-08-31T13:38:26Z No. of bitstreams: 1 arquivototal.pdf: 8739373 bytes, checksum: d6818f3641a41a432901226e81fb5946 (MD5) / Approved for entry into archive by Viviane Lima da Cunha (viviane@biblioteca.ufpb.br) on 2017-08-31T15:53:02Z (GMT) No. of bitstreams: 1 arquivototal.pdf: 8739373 bytes, checksum: d6818f3641a41a432901226e81fb5946 (MD5) / Approved for entry into archive by Viviane Lima da Cunha (viviane@biblioteca.ufpb.br) on 2017-08-31T15:53:18Z (GMT) No. of bitstreams: 1 arquivototal.pdf: 8739373 bytes, checksum: d6818f3641a41a432901226e81fb5946 (MD5) / Made available in DSpace on 2017-08-31T15:53:57Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 8739373 bytes, checksum: d6818f3641a41a432901226e81fb5946 (MD5) Previous issue date: 2017-02-17 / This thesis is aimed at studying the marketing system of water which is meant to be drunk, represented mainly by the modalities of tap water and bottled water. The main point of our thesis is that the aforementioned system is unbalanced and that bottled water consumption provokes social issues, both economic and environmental. In order to develop such proposition, we structured four objectives and carried out two empirical researches (qualitative and quantitative research). The first objective was to present how the Water Marketing System (SMA) works with water that is meant to be drunk. To achieve that, we described all the elements that form the SMA: entrances, agents, flows, activities, exits, context and other systems. We propose that the State is an agent with a special role and that Marketing is an academic field which can contribute to enhance the results in the system. Furthermore, we presented special elements that are central to harmonize the situations caused by unbalance: efficiency, stakeholder theory, distributive justice and sustainability. Moreover, we intended to understand the variables that influence in the consumer predisposition to replace bottled water for tap water (straight out of the tap or filtered). We developed a questionnaire for consumers all over Brazil, which was applied both face to face and online, out of which we have used a sample of 798 valid questionnaires. To manage statistical data, we applied multivariate regression techniques, Theil-Sen and quantile. That way, we found the following variables: “organoleptic characteristics”, “health risk” and “attitude towards tap water” influence in the likeability of replacement of tap water straight from the tap and “organoleptic characteristics”, “health risk”, “context indicators”, “attitude” and even “trust in government” influence when the intention is to replace and use treated water. In addition, we applied the analysis of variance and figured that, depending on the income of the consumer, there is variation in the predisposition to replace bottled water for tap water. Besides, we intend to present practices of incentive for the consumption of tap water developed by agents of SMA. We carried out the data collection through a documented research and interviews. We found that at least three different SMA agents (companies, NGO and State) encourage the consumption of tap water, developing actions that fit three theoretical frames: social marketing, consumer’s education and market regulation. Still, we note that the interviewed agents consider: that SMA is unbalanced, that information is key in the education process, that the bottled water companies intensify communication actions in order to promote bottled water as the best option for ingestion, amongst other findings. As a result of such steps, we conclude that there is a situation of unbalance in the SMA and that bottled water consumption generates a few problems. To sum up, we point to targets in support of the balance to be conducted by State and Marketing through the results we found, which led to a proposition of actions and target ideas for these two agents. / A presente tese estuda o sistema de marketing de água com a finalidade de beber, representado em sua maioria pela modalidade de água da torneira e água engarrafada. Assumimos como argumentos de tese que este sistema está desequilibrado e que o consumo de água engarrafada acarreta problemas sociais, econômicos e ambientais. Para o desenvolvimento desta proposta, elaboramos quatro objetivos e conduzimos duas pesquisas empíricas (quantitativa e qualitativa). O primeiro objetivo foi o de apresentar a configuração do Sistema de Marketing da Água (SMA) para finalidade de beber. Por tanto, fizemos a descrição de todos os elementos que formam o SMA: entradas, agentes, fluxos, atividades, saídas, contexto e outros sistemas. Propusemos que o Estado é um agente com papel especial e que o Marketing é uma área acadêmica que pode contribuir para aprimorar os resultados do sistema. Prosseguimos apresentando os elementos centrais para harmonizar as situações decorrentes de desequilíbrios: eficiência, teoria do stakeholder, justiça distributiva e sustentabilidade. Em seguida, designamos compreender as variáveis que influenciam a predisposição do consumidor a substituir água engarrafada por água da torneira (direto ou filtrada). Desenvolvemos um questionário que foi aplicado de forma presencial e on-line com consumidores de todo o Brasil. No total, conseguimos uma amostra de 798 questionários válidos. Para as análises estatísticas, realizamos Regressão Multivariada, Theil-Sen e Quantílica. Desta forma, encontramos que as variáveis ‘características organolépticas’, ‘risco para saúde’ e ‘atitude em relação à água da torneira’ influenciam a propensão de substituição para água direto da torneira; e ‘características organolépticas’, ‘risco para saúde’, ‘indicadores contextuais’, ‘atitude’ e, ainda, ‘confiança no governo’ influenciam quando a intenção é pela substituição por água tratada. Em adição, aplicamos a análise de variância e constatamos que, a depender da renda do consumidor, existe variação na predisposição a substituir água engarrafada por água direto da torneira. Depois, tencionamos apresentar práticas de incentivo para o consumo de água da torneira desenvolvidas por agentes do SMA. Realizamos coleta de dados através de uma pesquisa documental e da realização de entrevistas. Encontramos que pelo menos três agentes diferentes do SMA (companhias, ONG e Estado) encorajam o consumo de água da torneira, desenvolvendo ações que se encaixam em três recortes teóricos: marketing social, educação do consumidor e regulação de mercado. Ainda, constatamos que os agentes entrevistados consideram que: o SMA está desequilibrado, que a informação é chave do processo de educação, e que as empresas de água engarrafada intensificaram ações de comunicação para promovê-la como melhor opção para ingestão, entre outras verificações. Em decorrência destas etapas realizadas, concluímos que existe uma situação de desequilíbrio no SMA e que o consumo de água engarrafada gera alguns problemas. Por fim, visamos apontar direcionamentos em prol do equilíbrio a serem conduzidos pelo Estado e pelo Marketing a partir dos resultados encontrados, o que resultou na proposição de um conjunto de ações e direcionamentos para esses dois agentes.

Background: Compared to the general United States (U.S.) population, Arizona counties along the U.S.-Mexico border have a higher prevalence of dental caries, which can be reduced with adequate fluoride exposure. Because of concern regarding local tap water quality, fluoride-free bottled water consumption is common in this region, raising concern that families are not receiving adequate fluoride to promote dental health. Objective: To evaluate the levels of fluoride in tap and bottled water as well as the use of fluoride supplements in an Arizona border community. Methods: Low-income Latino households (n = 90) who report use of bottled water as their primary source of water intake were recruited. Participants completed a questionnaire about their and their children's dental histories and use of fluoride supplements. Water samples (bottled and tap) were collected from a subset of households (n = 30) for analysis of fluoride. Results: Fluoride detection levels were significantly greater (p = 0.02, Fisher's exact test) in tap water (average = 0.49 mg/dL) than in bottled water, yet, the majority (22/30) were below the range for optimal dental health (0.7-1.2 mg/L). Concentration of fluoride in the majority (29/30) of bottled water samples was below the quantitative detection limit of 0.4 mg/L. Children were significantly less likely to have dental caries if they received fluoride varnishing treatments (p = 0.01, Fisher's exact test), lived in households that reported using fluoridated mouthwash (p < 0.001, Fisher's exact test), their parents received fluoride education (p = 0.01, Fisher's exact test), and their parents reported visiting a dentist yearly (p < 0.001, Fisher's exact test). Furthermore, none of the participants reported receiving recommendations from health-care providers about fluoride supplementation or variance in content by the type of water consumed. Conclusion: Although fluoride was significantly more likely to be detected in tap than bottled water, neither water source in this border community is likely to provide enough fluoride for optimal dental health. Low-income children in this region may benefit from regular access to fluoride varnishing treatments and/or use of fluoridated mouthwash, interventions that could be tested in future well-designed trials.

This dissertation focuses on daily volt/var control in distribution networks with feeder capacitors, substation capacitors and transformers equipped with on-load tap changers. A hybrid approach is proposed to solve the daily volt/var control problem. To reduce the computational requirements of the problem, this approach combines two methods, namely heuristic and optimal scheduling for the substation and feeder sub-problems respectively. The feeder capacitor dispatch schedule is determined based on a heuristic reactive power setpoint method. At this stage the objective is to minimize the reactive power flow through the substation bus in every time-interval. And as such, mathematical modeling of the distribution network components is adapted to suit time-varying conditions. Furthermore, an optimization model to determine a proper dispatch schedule of the substation devices is formulated. The objective of this model is to minimize the daily total energy loss and voltage deviations. Additionally, the reference voltage of the substation secondary bus and the transformer tap position limits are modified to adapt to given load profiles. The optimization model is solved with a discrete particle swarm optimization algorithm, which incorporates Newton’s method to determine the power-flow solution. The proposed method is applied to a time-varying distribution system and evaluated under different operational scenarios. It is also compared to on-line volt/var control with various settings. Simulation results show that the proposed approach minimizes both the voltage deviations and the total energy loss, while on-line control prioritizes one objective over the other depending on the specified settings. / Dissertation (MEng)--University of Pretoria, 2015. / Electrical, Electronic and Computer Engineering / Unrestricted

京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第22636号 / 医博第4619号 / 新制||医||1044(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 高橋 淳, 教授 古川 壽亮, 教授 村井 俊哉 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM

Uppsatsen är gjord i form av en stilistisk analys med mål att utforska dokumentärfilmens autenticitet och mer specifikt en analys av mockumentärfilmers stilelement. Tanken är att genom att analysera vilka stilelement som används i mockumentärfilmer och analysera hur filmskaparna använder dem inom en film skapad ur fiktion, att se ut som en dokumentärfilms form av autenticitet. För analysen valde jag ut tre mockumentärfilmer: This Is Spinal Tap (1984), Man Bites Dog (1992) och Exit Through The Gift Shop (2010). Dessutom valdes ytterligare nio dokumentärfilmer ut, som används i analysens del för att kunna ge exempel från mockumentär till dokumentär. Analysen visar att filmskapare av mockumentärfilmer och dokumentärfilmer använder samma stilelement, men skillnaden ligger i hur filmskaparna använder dem. En mockumentärfilmskapare använder dokumentära stilelement med avsikt att filmen ska få samma utseende som en dokumentärfilm. Analysen visar också att en stor skillnad mellan dokumentärfilmen och mockumentärfilmen finns inom kontraktet till tittaren. Mockumentärfilmskapare knyter ett kontrakt till tittaren för att få åskådaren att förstå att filmen är fiktion. Med hjälp av detta kontrakt och samma förståelse av filmens mockumentära innehåll ger detta åskådaren det fulla spektrumet av filmens innehåll.

Distributed generation is transforming the power system grid to decentralized system where separate units like wind power generators or solar panel shall coexist and operate in tandem in order to supplement each other and make one extensive system as a whole so called smart grid. It is utmost important to have a control ability over such units not only on a field level but on a system level as well. To be able to communicate with numerous devices and maintain interoperability universal standard is a must. Therefore, one of the core standards relevant to smart grids is IEC 61850 – Power Utility Automation which comes into assistance and tackles aforementioned challenges. This project uses IEC61850 architecture to implement client/server windows applications for on-load tap changer remote control. The proposed solution and designed applications are tested together with a real time simulator where simple power system is modelled to emulate the system response to control signals in a real time. In this way, the implemented applications can be tried and assessed as if performing in real environment. Consequently, a user of the client application is able to remotely control voltage on the power transformer's secondary side and manipulate the switching equipment simulated in the model. / Distribuerad generation håller på att förändra transmissionsnätet till decentraliserat system där separata enheter som vindkraftverk eller solpanel skall samexistera och fungera tillsammans för att komplettera varandra och att göra ett omfattande system som helhet så kallade smarta elnät. Det är ytterst viktigt att ha en kontroll förmåga över sådana enheter inte bara på ett fältnivå utan även på systemnivå. För att kunna kommunicera med många enheter och bibehålla interoperabiliten som universell standard är ett måste. En av de grundläggande normer som är relevanta för smarta nät är IEC 61850 - Skydd &amp; Automation, som kommer in i bistånd och möter ovan nämnda utmaningar. Detta projekt använder IEC61850-struktur för att implementera klient/server windows applikation för lindningskopplarens fjärrkontroll. Den föreslagna lösningen och utformade applikationer testas tillsammans med en realtidssimulator där enkelt kraftsystem modelleras för att emulera systemets svar på de givna styrsignalerna i realtid. På detta sätt kan de implementerade programmen prövas och bedömas hur de utföras i verklig miljö. Följaktligen kan användare av klientapplikationen fjärrstyra spänningen på transformatorns sekundärsida och manipulera ställverk som simuleras i modellen.

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

In this paper numerical flow calculations with respect to the annular gaps with added radial grooves normaly used on the spools of directional control valves were carried out. The impact of various annular gap geometries and radial grooves during variable pressure conditions, and while using different hydraulic fluids, on the flows through annular gaps were investigated for different flow regimes. Samples with different geometries and numbers of radial groves on the spool of the directional control valve were also made for the purpose of carrying out flow measurements. The two different hydraulic fluids that were used in the numerical simulations and for the flow measurements were a hydraulic mineral oil and tap water. The results of the numerical calculations for the different models of the radial grooves with axially symmetric geometries show their impact on the internal leakage with respect to three different regimes of flow. The results of the numerical calculations based on the use of a hydraulic oil show a trend that was established by the experimental investigation.