Made available in DSpace on 2016-10-13T14:10:24Z (GMT). No. of bitstreams: 1 Raquel Duarte Hadler.pdf: 17231098 bytes, checksum: 7e9885f9a6ef82a629789e0aa6dda6fd (MD5) Previous issue date: 2015-03-30 / Departing from a reflection on the concept of good life developed by Aristotle, we propose a discussion about the communication possibilities of this concept inside consumption cultures through the analysis of the Slow Food movement narrative. This dissertation was developed inside the research line called Reception Processes and Sociocultural Contexts Articulated to Consumption of PPGCOM-ESPM. Its objective is to analyze how the participation in the Slow Food movement can trigger communication processes of reframing the subject due to the daily articulation of consumption practices and interpersonal relations proposed by the movement, as opposed to the ideal of good life, dominant in consumption cultures. For this, we point out as research subject narratives of the Slow Food movement and its participants as a way to communicate an ideal of good life in consumption cultures, which are analyzed through theoretical and methodological framework of critical hermeneutics. / A partir de uma reflexão sobre o conceito de vida boa desenvolvido por Aristóteles, propomos a discussão sobre as possibilidades de comunicação deste conceito nas culturas de consumo, através da análise de narrativas do movimento Slow Food, dentro da linha de pesquisa de Processos de Recepção e Contextos Socioculturais Articulados ao Consumo do PPGCOMESPM. O objetivo desta pesquisa é analisar como a participação no movimento Slow Food pode desencadear processos comunicacionais de ressignificação do sujeito a partir da articulação cotidiana de práticas de consumo e de relações interpessoais propostas pelo movimento, contrapondo-se ao ideal de vida boa dominante nas culturas de consumo. Para isso, apontamos como objeto de pesquisa narrativas do movimento Slow Food e de seus participantes, como forma de comunicar um ideal de vida boa nas culturas do consumo, as quais analisamos através do referencial teórico-metodológico da hermenêutica de profundidade.

Background: Kate Fletcher coined the concept of Slow Fashion in 2007, as a reaction to the throwaway society, called Fast Fashion. Fast Fashion is all about companies who choose to work in a quick and cheap way, while Slow Fashion is all about designing, producing and living in a better way for the environment and social sustainability. Purpose: The purpose of the study is to explore if, and in that case how, fashion firms can combine encouragement to Slow Fashion by their marketing and at the same time be able to increase sales in their business, or if it is even possible to combine. Theories: The PESTLE-model by Baines (2011), Sustainability model by Söderqvist et al. (2014), Seven forms of sustainable fashion by Green Strategy (2014), Slow Fashion Process by Pookulangara & Shepard (2013) and Marketing Mix by Baines (2011). Method: A qualitative method has been applied to the study, where four semi-structured interviews from selected Slow Fashion firms have been made, also homepage inspections and facts about the firms has been collected as secondary data. Conclusion: The conclusion of the study is that it is possible for fashion firms to combine encouragement to Slow Fashion and at the same time be able to increase their sales. This is possible through widening their range of products or stealing costumers from the Fast Fashion industry. / Bakgrund: Begreppet Slow Fashion myntades av Kate Fletcher år 2007 och är en reaktion på det snabba modet som idag produceras, som kallas Fast Fashion. Fast Fashion handlar om att företag väljer att arbeta på ett snabbt och billigt sätt medan Slow Fashion istället handlar om att designa, producera och leva på ett bättre sätt för att främja miljömässig och social hållbarhet. Syfte: Syftet med studien är att undersöka om och i så fall hur modeföretag kan förena uppmaningar till Slow Fashion via deras marknadsföring och samtidigt kunna öka sin försäljning, eller om det ens är möjligt att förena. Teorier: PESTLE-modellen av Baines (2011), Hållbar utvecklingsmodell av Söderqvist et al. (2014), Seven forms of sustainable fashion av Green Strategy (2014), Slow Fashion Process av Pookulangara & Shepard (2013) och Marketing Mix av Baines (2011). Metod: Till studien har en kvalitativ metod tillämpats, där primärdata är i form av semistrukturerade intervjuer från fyra valda Slow Fashionföretag samt sekundärdata i form av hemsidegranskning samt material om företagen.        Slutsats: Studiens slutsats är att det är möjligt för modeföretag att förena en uppmaning till Slow Fashion samtidigt som de vill öka sin försäljning. Detta är möjligt genom att bredda sitt sortiment eller genom att stjäla kunder från Fast Fashionföretag samt öka sin kundkrets.

Pasaulinė turizmo organizaija (PTO) prognozuoja, kad turistų srautai kasmet didės, o 2020 m. atvykstamasis turizmas sieks 1.6 milijardus atvykimų visame pasaulyje. Kaimo turizmo augimas sieks 20 % ir sudarys 11 % visos turizmo rinkos. Tod��l darniojo turizmo vystymasis tampa labai svarbus. Žmonės iš išsivysčiusių kraštų ieško lėtos kelionės rinkos, kurios koncepcija labai glaudžiai susijusi su darniojo turizmo vystymusi ir kaimo turizmu. Straipsnis apžvelgia kaimo turizmo rinkos vystimąsi Lietuvoje. Didžiausias dėmesys kreipiamas Kauno regionui, ypač Kauno rajonui, kuris netrukus turėtų sėkmingai konkuruoti su itin sparčiai besiplečiančiomis Vilniaus bei Klaipėdos regionų kaimo turizmo rinkomis. Lėtos kelionės koncepcijos pritaikymas būtų didelė parama konkurencinėje kovoje, tačiau, kaip rodo atlikti tyrimai, pritaikymas Kauno rajone sudėtingas dėl nepakankamo sodybų šeimininkų išsilavinimo lygio turizmo srityje bei žemos motyvacijos siūlyti naujos koncepcijos paslaugas savo klientams. / WTO forecasts the growth of tourists every year and up to 2020 the arrivals will reach 1.6 billions. The growth of rural tourism will reach 20 percent and make 11 percent of the whole tourism market. That‘s why it is very important to be sure of sustainable tourism development. People from the well developed countries are looking for a slow tourism markets which is close to the idea of sustainable tourism development and rural tourism. The article surveys rural tourism development in Lithuania and concentres on Middle Lithuania, especially Kaunas region, which is looking forward to rural tourism development and will have to compete with other more developed regions like Vilnius or Klaipėda. The application of slow tourism concept will be a good help during the competition fight but the survey shows that the possibility to apply the concept in Kaunas region will be quite complicated because of low education and motivation level of the countryside farmstead hosts.

Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-06-19T15:09:53Z No. of bitstreams: 1 marianasibelefernandes.pdf: 1108255 bytes, checksum: f008fe309f4318d5c763a477af2bdca7 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-06-29T12:27:02Z (GMT) No. of bitstreams: 1 marianasibelefernandes.pdf: 1108255 bytes, checksum: f008fe309f4318d5c763a477af2bdca7 (MD5) / Made available in DSpace on 2017-06-29T12:27:02Z (GMT). No. of bitstreams: 1 marianasibelefernandes.pdf: 1108255 bytes, checksum: f008fe309f4318d5c763a477af2bdca7 (MD5) Previous issue date: 2017-04-25 / O fascínio pela dimensão temporal, evidenciado na forma e ou na temática de algumas obras, marca uma das principais características encontradas em parte do documentário brasileiro contemporâneo. A ênfase na passagem do tempo ganha maior relevo quando, na busca incessante pela experiência singular do outro, os filmes abordam a memória pessoal como possibilidade de relacionar o ordinário, os gestos mais banais a um modo particular de ser e de estar num mundo em devir. E, se tratando da forma, a preferência por imagens longas e fixas intensifica a ideia de inexorabilidade do tempo, provocando no espectador o que Lúcia Nagib (2013) chama de stasis reflexiva. A tendência por um cinema mais contemplativo, cuja estética da lentidão nos direciona para novas formas de realismo cinematográfico, pode estar relacionada com o que tem se convencionado chamar de slow cinema – caracterizado, principalmente, pela fixação com o tempo, o uso de tomadas longas, a falta de enredo e o foco no cotidiano. / The fascination for the temporal dimension, evidenced in the form and or thematic of some works, marks one of the main features found in part of contemporary brazilian documentary. The emphasis on the passage of time comes to the fore when, in the incessant search for the individual's unique experience, the films approach personal memory as the possibility of relating the ordinary, the most banal gestures to a particular way of being and being in a becoming world. And, as for form, the preference for long and fixed images intensifies the idea of inexorability of time, provoking in the spectator what Lúcia Nagib (2013) calls reflexive stasis. The tendency for a more contemplative cinema, whose aesthetics of slowness directs us to new forms of cinematic realism, may be related to what has been conventionally termed slow cinema - mainly characterized by the fixation with time, the use of long shots, the lack of plot and the focus on everyday life.

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Through continued innovation and growth, traveling wave tube amplifiers (TWTAs) remains the microwave power amplifiers of choice in a wide range of high power microwave and millimeter-wave applications specifically for aerospace applications with the volume, weight, bandwidth and power constraints. These advances can be credited to device innovation, improved modeling and design and development of advanced materials and construction techniques. This thesis aims at advancing the present technology of TWTs with coupled resonator slow-wave structures (SWSs) by a combination of device innovation, development of enhanced analytical and field analysis codes and understanding gained through improved modeling, simulation and experimentation. In a TWT, the SWS that slows the RF wave velocity down to near the electron beam velocity for interaction with the electron beam primarily determines the microwave performances of the tube. As compared to helix SWS, the coupled resonator SWS is capable of handling high peak and average powers with higher efficiency and TWTs based on these SWS are well suited for air-borne or space-borne radar systems and the major focus of this thesis is on the analysis and design of coupled resonator SWSs. As a part of this thesis, improved analytical codes based on quasi-TEM analysis and equivalent circuit analysis have been developed. The technical formulation is explained and the improvements made for enhanced accuracy and for incorporation of different types of coupled resonator SWSs detailed. Using these models new variants of coupled resonator SWSs have been investigated. The SWSs proposed are the ladder-core inverted slot mode SWS and the inductively loaded inter digital SWS (ILID-SWS). The possibility of achieving both coalesced mode design that gives wide bandwidth and multi beam design that improves the peak power and gain using rectangular ILID-SWS is presented. The properties of these proposed SWSs have been compared with the existing SWSs and found to give superior performance. Also an improved modeling and simulation technique using 3-D electromagnetic codes has been proposed and the conventional cold test measurement procedure has been modified for more accurate results. Numerous illustrative examples are presented throughout the thesis highlighting the analytical model and simulation code validation with experimental results. The experimentations have been carried out on the real SWS model that have been fabricated and assembled. Further, the contribution of the thesis is towards the development of a field analysis model for analysis of a corrugated waveguide SWS, based on the coupled integral equation technique (CIET), which is a combination of mode matching technique (MMT) and method of moments. The technical formulation and computational methodology employed in the model are explained and some of the most important aspects of implementation like the handling of singularities and choice of parameters controlling the accuracy is discussed. The accuracy and speed of the code is demonstrated by comparing CIET with MMT and 3-D electro magnetic simulators based on finite difference time domain (FDTD) method and finite element method (FEM). The CIET code developed is quite faster than the existing numerical methods and helps in solving the convergence problem associated with the MMT.

慢城運動 (cittaslow) 在1999年於義大利正式發起，由慢食運動延伸而來，有鑑於全球化變遷下，過度追求快速發展與效率性，而忽略了城市原本與自然共處的平衡以及悠久的歷史人文，慢城運動目的是為了人類社會的永續發展，透過傳統技術加上現代科技，在保護自然與傳統文化同時，兼顧發展該地區的經濟，打造出真正適合人居住的都市。 而韓國早在2005年就開始積極尋求慢城認證的可能，並在2007年成為亞洲第一個獲得慢城認證的國家，並於五年內將認證的慢城數量提升至十二個之多。其中，本研究的主要研究對象，南揚州鳥安慢城即位於繁忙的首爾首都圈內，在這凡事講求快速、效率的國家，如何在快與慢、地區發展與保護間取得平衡，是值得探討的對象。韓國各慢城的誕生，除了保護當地自然環境與人文歷史以及推廣傳統技術外，在地方政府與韓國觀光公社的合作下，也充分發揮該地的觀光資源，為這些城市帶來更多經濟效益。而韓國在2012年時，其中一個慢城在重新審查的過程中，由於過度商業化、外來投資客過多等，造成資格不符被除去慢城的認證，這也讓韓國開始思考慢城發展速度是否過快，以及慢城究竟是為了地區居民，還是為了觀光而打造的產物。 因此本研究將以韓國慢城運動為中心，探討韓國慢城運動發展過程與現況，並以首爾首都圈內的慢城南揚州鳥安為研究對象，透過實地觀察與深度訪談的方式，分析慢城的主體，也就是地區居民，對慢城運動的態度與看法。2014年臺灣花蓮鳳林鎮成為第一個獲得認證的慢城，同時也有城市開始推動慢城運動與認證，本研究透過討論韓國的慢城運動經驗發展經驗以及地區居民對慢城的態度，希望能夠提供正在發展慢城運動的臺灣相關經驗。

Vacuum microwave tubes, such as klystron, traveling-wave tube, gyrotron are high efficiency devices, where the RF interaction structure facilitates efficient energy transfer from the kinetic energy of the high energy electron beam to the electromagnetic wave. Traveling-wave Tube is the most versatile microwave power amplifier widely used for terrestrial communication, radar and aerospace applications. The waveguide based slow-wave structures like Millman, Karp, inter digital, grated waveguide, ring-plane, ring-bar, millitron and folded-waveguide structure gathered importance for application in millimeter-wave traveling-wave tubes. Among these millimeter-wave interaction structures, the folded-waveguide slow-wave structure became the most popular due to its robust structure, high power capability, low RF loss, simpler coupling, reasonably wide bandwidth and ease of fabrication for millimeter-wave to terahertz frequencies. Hence this thesis aims to analyse the folded-waveguide slow-wave structure for broad-banding and efficiency enhancement. The existing approaches for the analysis of cold circuit parameters (dispersion and interaction impedance characteristics) of folded-waveguide slow-wave structure are reinvestigated and found that these have limitation, as the effects of E-plane bend and beam-hole discontinuities are ignored in the parametric analysis. A cascaded matrix equivalent circuit model includes the effect of E-plane and beam-hole discontinuities for the analysis, but reported only for the serpentine folded-waveguide slow-wave structure. The cold test measurement technique was reported only for the dispersion characteristics. Hence the measurement technique has to be extended for the measurement of interaction impedance. The author proposes to orient the present doctoral work to (i) extend the proposed cascaded transmission matrix equivalent model for the analysis of rectangular folded-waveguide slow-wave structure, (ii) develop a non-resonant perturbation technique for the measurement of interaction impedance characteristics of the folded-waveguide slow-wave structure and also to (iii) establish new analysis models for the folded-waveguide slow-wave structure. The effect of E-plane bend and beam-hole discontinuities on the RF characteristics have been considered and simple, yet accurate closed form expressions for the computation of dispersion and interaction impedance characteristics have been established by three different approaches namely: transmission line equivalent circuit model, conformal mapping equivalent circuit model and quasi-TEM approach. The analysis results are benchmarked against 3-D electromagnetic modeling. The non-resonant perturbation theory is developed for the interaction impedance measurement. Typical Ka-band structures are fabricated by wire-EDM process and cold test measurements are carried out to benchmark the analysis approaches. The equivalent circuit models based on lumped circuit model are simpler than the cascaded matrix equivalent circuit model and can give closed form expressions for the prediction of dispersion and interaction impedance characteristics. The quasi-TEM approach can be extended for the complicated structure like ridge-loaded FWG-SWS. Broad-banding of the conventional folded-waveguide slow-wave structure is attempted by ridge-loading on the broad wall of the structure. The ridge-loaded folded-waveguide slow-wave structure is analyzed by parametric approach, cascaded transmission matrix equivalent circuit model and quasi-TEM approach and validated against numerical simulation. The analysis is extended for exploring the efficacy of the ridge-loading on broad-banding of the traveling-wave tube. Finally efficiency enhancement of the folded-waveguide slow-wave structure is attempted by introducing grating on the broad wall of the structure. The analysis is carried out by numerical simulation for exploring the efficacy of the grating on efficiency enhancement of the traveling-wave tube.

published_or_final_version / Education / Master / Master of Education

Disertacijoje sprendžiama papildomų ekranų įtakos meandrinių lėtinimo sistemų dažninėms savybėms įvertinimo problema. Pagrindiniai tyrimo objektai – planariosios meandrinės lėtinimo sistemos (PMLS) su papildomais ekranais, jų modeliai ir analizės bei sintezės metodai. Darbo tikslas – ištirti PMLS su papildomais ekranais, sukurti naujus modelius ir jų tyrimo metodikas leidžiančias įvertinti lėtinimo sistemų kraštų bei galų efektus, sukurti tokių lėtinimo sistemų parametrinės sintezės metodiką. / The dissertation investigates the issues of influence of additional shields on frequency characteristics of meander slow-wave system. The main objects of research include planar meander slow-wave systems with additional shields, their models and the methods of analysis and synthesis. The primary purpose of this dissertation is to investigate the planar meander slow-wave systems with additional shields by creating new models and their investigation techniques which allow to evaluate the effects on the edges and ends of slow-wave systems and create the technique for parametric synthesis of such slow-wave systems.