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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Estudo da densificação do combustível urânio - 7% gadolínio (Gd2O3) nanoestruturado / Fuel densification study about uranium- 7% nanostructured gadolinium (Gd2O3)

SERAFIM, ANTONIO da C. 25 May 2017 (has links)
Submitted by Marco Antonio Oliveira da Silva (maosilva@ipen.br) on 2017-05-25T13:33:55Z No. of bitstreams: 0 / Made available in DSpace on 2017-05-25T13:33:55Z (GMT). No. of bitstreams: 0 / O processo de sinterização de pastilhas de UO2-Gd2O3 tem sido investigado devido à sua importância na indústria nuclear e ao comportamento complexo durante a sinterização. A sinterização é bloqueada a partir de 1300°C, quando a densificação é deslocada na direção de maiores temperaturas e a densidade final obtida é diminuída. Esta pesquisa contempla o desenvolvimento de combustíveis nucleares para reatores de potência visando aumentar a sua eficiência no núcleo do reator através da elevação da taxa de queima. Foi estudado o uso do Gd2O3 de tamanho nanométrico, na faixa de 10 a 30nm, o qual foi adicionado ao UO2, visando verificar a possibilidade de evitar-se o característico bloqueio da sinterização devido ao efeito Kirkendall observado em pesquisas anteriores. As amostras foram produzidas por meio da mistura mecânica a seco dos pós de UO2 e de 7% Gd2O3 (macroestruturado e nanométrico). Os pós foram compactados e as pastilhas foram sinterizadas a 1700°C sob atmosfera de H2. Os resultados indicam que o característico bloqueio da sinterização no sistema UO2-Gd2O3 macroestruturado, que ocorre na faixa de temperatura de 1300-1500°C, retardando a densificação, foi observado de forma menos intensa quando o Gd2O3 nanométrico foi utilizado, ocorrendo à temperatura de 900°C, e facilitando a densificação posterior. Os ensaios dilatométricos indicaram uma retração de 22, 18 e 20% respectivamente nas pastilhas de UO2, UO2-7%Gd2O3 macro e UO2-7% Gd2O3nanométrico. Foi verificada uma retração 2% maior quando o Gd2O3 nanométrico foi utilizado quando comparada com a obtida com o uso do Gd2O3 macro, usado comercialmente, resultando em pastilhas com densidade adequada para uso como combustível nuclear. / Dissertação (Mestrado em Tecnologia Nuclear) / IPEN/D / Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
152

Mecanismos de ligação da serragem de madeira densificada com diferentes teores de umidade em diferentes temperaturas / Binding mechanisms of sawdust densified with different moisture contents at different temperatures

Walbert Chrisostomo 19 February 2016 (has links)
Para tornar a biomassa disponível para aplicações em biocombustíveis, produtos químicos e materiais, algumas propriedades indesejáveis, como alto teor de umidade e baixa densidade, devem ser corrigidos. Uma solução para estes problemas seria a densificação da biomassa. O processo de densificação da biomassa e seus resíduos, como a briquetagem e a peletização, são muito conhecidos e utilizados, entretanto, não existe um consenso sobre os mecanismos de ligação que ocorre entre as partículas da biomassa densificada e a influência que as variáveis da matéria-prima e do processo de densificação exerce sobre eles. Compreender os mecanismos de ligação entre as partículas da biomassa densificada é fundamental para determinar os parâmetros da matéria-prima e do processo de densificação, assim como os ensaios que devem ser realizados para medir a qualidade do produto densificado. Este trabalho teve como objetivo principal analisar o efeito das variáveis do material e do processo de densificação da serragem de madeira nas propriedades do produto densificado e a sua influência sobre os mecanismos de ligação entre as partículas do material. O material utilizado neste trabalho foi a serragem de Eucalyptus sp. Foram analisados o efeito do teor de umidade do material e a temperatura do processo de densificação na densidade e resistência mecânica do produto densificado, como também a influência da composição química da serragem na transição vítrea do material. A serragem de eucalipto foi caracterizada por análise termogravimétrica (TGA), caracterização química e espectroscopia de infravermelho por transformada de Fourier (FTIR). A caracterização de serragem densificada foi realizada por densidade aparente, expansão volumétrica, ensaio mecânico de compressão, microscopia eletrônica de varredura (MEV), microscopia ótica (MO), espectrometria de massa de íons secundários por tempo de voo (ToF-SIMS) e análise dinâmico-mecânica (DMA). Os resultados mostraram que no processo de densificação sem aquecimento, o teor de umidade ideal da serragem de eucalipto foi o de aproximadamente 10%, favorecendo as forças intermoleculares entre as partículas do material. Na densificação da serragem de eucalipto em diferentes temperaturas, a lignina agiu como um aglutinante natural, formando pontes sólidas entre as partículas do material em temperaturas superiores à 140°C. A transição vítrea encontrada para a lignina da serragem de eucalipto foi da ordem de 135°C. Em conclusão, as variáveis do material e do processo de densificação influenciaram nos mecanismos de ligação, afetando as propriedades da serragem de madeira densificada. Os principais mecanismos de ligação encontrados na serragem de madeira densificada foram interações intermoleculares e pontes sólidas. / Making biomass available for investments in biofuels, chemicals and materials, some undesirable properties as high moisture content and low density must be corrected. One solution to these problems would be densification of biomass. The densification process of biomass and waste materials, such as briquetting and pelletizing, are well known and used, however, there is no consensus about the connection mechanism occurs between the particles of the densified biomass and the influence of the variables of raw material and densification process has on them. Understanding the connection mechanism between the particles of the densified biomass is critical in determining the parameters of the raw material and the densification process, as well as the tests that should be performed to measure the quality of densified product. This study aimed to analyze the effect of varying the material and the densification process of sawdust in the densified product features and their influence on the binding mechanism between the particles of the material. The material in this work was the sawdust Eucalyptus sp. It was analyzed the effect of the material moisture content and temperature of the densification process in the density and mechanical strength of the densified product, but also the influence of the chemical composition of sawdust on the glass transition of the material. The eucalyptus sawdust was characterized by thermogravimetric analysis (TGA), chemical analysis and Fourier transform infrared spectroscopic (FTIR). The characterization of densified sawdust was performed by bulk density, volumetric expansion, compression mechanical testing, scanning electron microscopy (SEM), optical microscopy (OM), mass spectrometry of secondary ions time of flight (ToF-SIMS) and dynamical mechanical analysis (DMA). The results showed that without the heat densification process, the ideal moisture content eucalyptus sawdust was about 10%, favoring the intermolecular forces between particles of the material. In eucalyptus sawdust densification at different temperatures, lignin acted as a natural binder to form solid bridges between particles of the material at temperatures higher than 140°C. The glass transition temperature of the lignin found to eucalyptus sawdust was of the order of 135°C. In conclusion, the variables of material and densification process influenced the binding mechanism affecting the properties of the densified wood sawdust. The main binding mechanism found in densified wood sawdust were intermolecular interactions and solid bridges.
153

Estudo em túnel de vento da relação entre o padrão de adensamento e o conforto de pedestres : aplicação à região do Altiplano Cabo Branco, João Pessoa-PB / Study in wind tunnel of the relation between the densification pattern and pedestrian comfort: application to the Altiplano Cabo Branco region, João Pessoa-PB

Queiroga, Silvana Chaves Claudino de January 2014 (has links)
O padrão de adensamento urbano impacta no conforto do pedestre no que diz respeito, sobretudo, à possibilidade de alterar as condições de vento ao nível do solo gerando zonas de desconforto. As cidades convivem com constantes mudanças em sua configuração tanto pelo adensamento quanto pela verticalização de suas estruturas, esta condição modifica a ventilação natural urbana, alterando as condições de vento no entorno de edifícios, o que afeta o escoamento de ar ao nível do solo, atingindo o conforto do pedestre. Então, o objetivo desta pesquisa é analisar o conforto do pedestre em relação ao vento em analogia a padrões de adensamento urbanos, considerando ensaios experimentais em túnel de vento a partir da aplicação em área urbana da cidade de João Pessoa-PB. A área investigada é parte dos bairros Altiplano Cabo Branco e Cabo Branco, localidade que, nos últimos anos, tem passado por grandes mudanças em sua configuração, respaldadas por alterações do instrumento urbanístico. Motivando o estudo de padrão de ocupação e seu reflexo no conforto do pedestre frente ao vento, pelo meio da avaliação de duas configurações de vizinhança ensaiadas em túnel de vento. As proposições referem-se a padrão de adensamento antigo, anterior ao ano de 2005 e adensamento recente, referente a situação atual, ano de 2012, as duas situações propostas reproduzem circunstâncias reais Os experimentos foram realizados com modelos, M1 e M2, em escala reduzida, referente a 1/400; no Túnel de Vento Prof. Joaquim Blessmann da Universidade Federal do Rio Grande do Sul, mesa M-II; pela simulação de vento do tipo turbulento, compatível com as condições do local estudado. Consideraram-se as configurações de ensaio utilizadas nesse túnel de vento para simular perfis de velocidade média, que correspondem às categorias de terreno definidos na NBR 6.123/1988, vento mar, categoria I, e vento terra, entre a categoria III e IV. Iniciou-se com os ensaios de escoamento de camada limite, que envolve a aquisição de dados de velocidades instantâneas do vento, obtidos com anemômetros de fio quente, a partir de malha de medição definida, sendo, sete linhas, oito posições e dez alturas, para dois rumos de vento, sendo 900 e 1500, definindo o comportamento do vento para a área E, prosseguiram-se com os ensaios de conforto do pedestre, através de medições de velocidades ao nível do solo para trinta e seis posições, pontos distribuídos por passeios e calçadas, por meio de sondas de pedestres, sondas tipo Irwin, realizando tomadas para vinte e quatro ângulos de incidência de vento, marcados a cada 150. Para aferir as condições de vento para o pedestre, utilizaram-se critérios de conforto baseados na Escala Beaufort, que relacionam a atividade, o local e o nível de conforto relativo, pondera ainda acerca de critérios de aceitação para períodos de retorno, um ano, um mês e uma semana. Os resultados obtidos para as configurações de vizinhança referentes ao escoamento para a área e ao conforto do pedestre, foram confrontados, atentando-se que o adensamento urbano modifica consideravelmente o campo de vento de áreas urbanas, atingindo o conforto do pedestre, impossibilitando-o, para algumas posições estudadas, de realizar atividades corriqueiras com conforto. Então, assentam-se fundamentos que orientam a ocupação do solo com vistas à garantia de realização pelo pedestre, com nível de conforto relativo “aceitável”, das atividades inerentes aos usos propostos para o ambiente urbano, colaborando com o planejamento, o controle e a intervenção em áreas urbanizadas, favorecendo, também, o crescimento saudável das cidades. / The pattern of urban densification impacts on pedestrian comfort, specially, in relation with the possibility of changing the wind conditions at ground level, generating discomfort zones. Cities live with constant changes in its configuration due to the densification and to the verticalization of its structures. This condition modifies the urban natural ventilation, changing, the wind conditions in the building surroundings, which affects the air outflow at ground level, impacting on pedestrian comfort. The objective of this work is to analyze the relation between the pedestrian comfort and the wind, similarly to the patterns of urban densification, considering experimental tests in wind tunnel, since application in the urban area of João Pessoa-PB city. The investigated area is part of the neighborhoods of Altiplano Cabo Branco and Cabo Branco, João Pessoa-PB, region that, in the last years, has been passing through considerable changings in its configuration, supported by alterations in the urban instrument. Motivating the study of the occupation patterns and its reflection in the pedestrian comfort facing the wind through the analysis of two neighborhood configurations, simulated in the wind tunnel, through experiments. The propositions refer to an old densification before the year of 2005 and to a recent densification, referring to a current situation, both proposed situations reproduce real circumstances The experiments were realized with models, M1 and M2, in reduced scale, regarding 1/400; in the Túnel de Vento Prof. Joaquim Blessmann from Universidade Federal do Rio Grande do Sul, table M-II; by the simulation of the turbulent wind, compatible with the conditions of the studied place. The configurations of assay used in this wind tunnel to simulate average velocity profiles were considered, which correspond to the ground defined in NBR 6.123/1988, sea wind, category I, and land wind, between the category III and IV. Beginning with experiments of the boundary layer’s outflow that are related to the acquisition of the wind’s instantaneous velocities’ data obtained with hot wire anemometers, from the defined measurements mesh, being seven lines, eight positions and ten heights, to two wind courses, being 900 and 1500, defining the behavior of the wind to the area. And, continued with the assays of pedestrian comfort, through measurements of the velocities at ground level for thirty six positions, points distributed for sidewalks, through pedestrian sensors, sensors of the Irwin type, realizing measurements for twenty four incidence angles, marked every 150 In order to verify the wind conditions for the pedestrians, comfort criterions based in the Escala Beaufort were utilized, which make a relation of the activity, the place and the relative comfort level, it still ponders about the acceptance criterions for return periods, one year, one month and one week. The results obtained for the configurations of the neighborhoods referents to the area’s outflow and to the pedestrian comfort were confronted, paying special attention to the fact that the urban densification modifies substantially the wind field of the urban areas, affecting the pedestrian comfort, impossibilitating it, for some studied positions, for realizing everyday activities with comfort. Then, fundamentals that guide the pattern of ground occupation were consolidated, aiming the guaranty of realization by pedestrian, with an “acceptable” relative comfort level, for the activities inherent to the uses proposed to the urban ambient, collaborating with the planning, the control and the intervention in urbanized areas, still assisting the healthy growth of the cities.
154

Bostadsnära natur ur statligt-, kommunalt- och medborgarperspektiv

Petersson, Rebecca, Blomberg Liwéll, Victoria January 2020 (has links)
Uppsatsen syftar till att, med Linköpings kommun som exempel, undersöka utmaningar som svensk stadsplanering står inför när det gäller att tillgodose bostadsnära natur samtidigt som det planeras för befolkningstillväxt och förtätning. Uppsatsen redogör för vilken betydelse den bostadsnära naturen tillmäts av både statliga myndigheter och kommunen, hur kommunen planerar, vilken relation de boende i staden har till den bostadsnära naturen samt hur de upplever kommunens strategi. Resultatet från textanalyser och en enkätundersökning visar på att statliga myndigheter och kommunen anser det vara viktigt att planera för bostadsnära natur. Myndigheter, liksom medborgarna, har en bred syn på vad bostadsnära natur är, men en snävare bild framkommer när myndigheterna presenterar konkreta strategier för kommunerna, vilket i sin tur leder till att kommunen definierar den bostadsnära naturen snävt. Utifrån kommunens kriterier anser sig hälften av medborgarna sakna tillgång till bostadsnära natur. Men utifrån medborgarnas egen definition tillgodoses nästan alla av bostadsnära natur. / This thesis aims, with the municipality of Linköping as an example, to study challenges the Swedish city planning is facing when planning for residential nature while at the same time planning for population growth. We describe the significance of residential nature from the perspective of state authorities and municipality, how the municipality plans, what relation-ship citizens have to the nature and how they experience the municipality’s strategy. Result from text analyses and a survey show that state authorities and the municipality consider it important to plan for nature. Authorities, likewise the citizens, use a broad definition. But a narrower picture is presented when the state agencies produce concrete strategies, which gen-erates the municipality to define it narrow. On basis of the municipality's criteria one-half of the citizens lack access to nature. At the same time, on the basis of their own definition, only 10% of the citizens lack residential nature.
155

Grönytans betydelse i Sundbybergs stad : ur ett planerarperspektiv och ett invånarperspektiv

Beckman, Lisa January 2020 (has links)
The densification of cities in Sweden often result in loss of green space and puts the beneficial values of urban green space under risk. Especially affected are the inhabitants residing in the city core. Through a qualitative case study of Sundbyberg city, this study aims to explore which features of green spaces that becomes important for residents in a city undergoing fast densification. As well as how the needs are answered from a planning perspective. In order to illustrate both perspectives, the study consists of interviews with planners and residents. The results of the study show that the few green spaces in the city core in large have been compensated with small spaces working as multifunctional places. One example of a multifunctional place is a pocket park. This, planners and residents show both a positive and negative view on. The benefits are simply about that it is needed. The disadvantages raised are mainly about the feelings of those places as private and closed space for some people, although these places origins as open space. The study shows that many similarities prevail between the planners and residents views on the different importance’s of the city’s green spaces. It also shows that there is a discrepancy between the residents experienced needs of green spaces and the planner’s vision of the citys future development. While the residents seem to want more quiet places and places for spontaneous activities, especially to meet the needs of elderly and young. The planner’s visions of the citys development seem to go more towards creating small, to some extent green, safe places which connects different parts of the city.
156

Stadsplaneringens Pussel : En kvalitativ fallstudie om medborgardeltagandets betydelse vid planeringen av Hammarby stadsdel utifrån politiker, tjänstemän samt medborgarens perspektiv.

Renström, Gustaf, Isosalo Jansson, Emma January 2020 (has links)
This case study seeks to examine citizen participation in urban planning by closely examining The purpose of this case study is to examine how citizen participation has worked in the planned construction project on Hammarby in Västerås and the effects the citizen participation has had. The theoretical framework of the study is rational and collaborative planning theory and a combination of Arnstein’s ladder of citizen participation and SKR’s participation stair. The method used for the study is a combination of semi structured qualitative interviews and asynchronous interviews. The parties that the study examines include politicians from byggnadsnämnden, officials from stadsbyggnadsförvaltningen and citizens from Hammarby stadsdelsförening. The findings of this study are that all respondents were positive towards the concept of citizen participation from a theoretical point of view but that the dialog between the city and the citizens did not work as intended. However, the citizens did have a major influence in cancellation and subsequent rework of local plan 1858. It was apparent that the citizens favoured one form of citizen dialogue while the city favoured another. The citizens wanted a more deliberate approach to citizen dialogue while the politicians and officials favoured an approach based on rational planning theory. Put simply the citizens wanted the dialogues to take place in a larger forum while the politicians wanted to split the meetings into smaller groups to get a wider variety of comments from the citizens. / Syftet med fallstudien är att undersöka hur medborgardeltagandet fungerade vid det planerade bygget på stadsdelen Hammarby i Västerås samt då vilken effekt den förda medborgardialogen hade. Studiens teoretiska anknytning är rationellt och kommunikativ planeringsteori samt en kombination utav Arnsteins deltagarstege samt SKR:s deltaktighetstrappa. Metoden som har används i undersökningen är en kombination utav semistrukturerade kvalitativa intervjuer samt asynkroniska intervjuer. Aktörerna som medverkat i undersökningen är politiker från byggnadsnämnden, en tjänsteman ifrån stadsbyggnadsförvaltningen samt medborgare ifrån Hammarby stadsdelsförening. Undersökningens slutsats är att samtliga respondenter var positivt inställda till medborgardeltagande ur ett teoretiskt perspektiv men främst dialogen mellan medborgare och Västerås Stad fungerade däremot inte på ett önskvärt sätt. Medborgarna hade däremot stort inflytande i och med att detaljplan 1858 lades på is och numera omarbetas. Det var däremot tydligt att medborgare förespråkade en typ av medborgardialog medan politikerna och tjänstemannen föredrog en annan. Medborgarna ville ha en mer kommunikativ och deliberativ dialog medan politikerna och tjänstemannen i större omfattning drevs utav den rationella planeringsteorin. I mer konkret bemärkelse så ville medborgarna att medborgardialogerna skulle bedrivas i betydligt större forum medan politiker och tjänstemannen föredrog att dialogen skulle föras i mindre grupper för att på sådant sätt kunna samla in en större bredd i medborgarens synpunkter.
157

We don't need another 4000 neighbours : a critical design strategy that values the existing Hagalund

Friberg, Elin January 2015 (has links)
In August 2014 a development strategy for Hagalund, a million program area situated in Solna, was published. The strategy argues that a densification of the area would increase the local supply of services and cultural activities and that the existing needs of investment in the urban environment is dependent on the revenues that new housing would provide. The report proposes a densification of the area up to 1800 new apartments. The current housing stock is 2100 dwellings. I argue that the development strategy is not based on the needs of the existing Hagalund and its residents, but rather tries to meet the economic interests of property owners, the municipality and the imagined needs of a future population. In this diploma work I design an alternative participatory strategy to identify needs and potentials of an existing built environment and its social community, since I see a lot of potentials and qualitites, rather than problems, in Hagalund. I have chosen to value the situated knowledge of the current community by collecting opinions and reactions from people I have met during my thesis work and formulated them into an alternative future for Hagalund where the existing built environment and its social community are valued as key elements in a more socially sustainable future for Hagalund. / I augusti 2014 publicerades en utvecklingsstrategi för Hagalund, ett miljonprogramsområde i Solna, med en föreslagen förtätning av området på upp till 1800 nya lägenheter. Stadsdelen har under de senaste åren nedprioriterats av kommunen med bland annat flera nedstängda skolor som följd. Strategin konstaterar att antalet boende i området måste öka för att öka tillgången till service och kulturella aktiviteter, samt att nya bostäder krävs för att finansiera upprustningen av den offentliga miljön. Dialogen med hagalundarna lyfts återkommande fram som underlag till förslaget i utvecklingsstrategin, vilket jag tidigt ställde mig kritisk till. Hur kan en upprustning av stadsmiljön samt behovet av en skola kräva 4000 nya grannar? Jag menar att utvecklingsstrategin inte utgår från hagalundarnas och Hagalunds behov, utan att den försöker möta fastighetsägares, kommunens och en eventuell framtida befolknings behov. Mitt examensarbete utgår istället från behoven i, och potentialen av, det befintliga Hagalund och dess ’situerade kunskap’. Under mitt examensarbetet har jag samlat in synpunkter och reaktioner från människor jag mött och formulerat dessa i en alternativ framtid för Hagalund, där den befintliga byggda miljön och dess sociala gemenskap värderas som viktiga pusselbitar i en mer socialt hållbar framtid för området.
158

Förtätning av Ålidhem - ett lyckat exempel? : En kvalitativ studie om Umeå kommuns strategi vid ökad befolkning

Sundström, Teodor January 2023 (has links)
This study has aimed to investigate how urban transformation, particularly densification, is received by the inhabitants. For this essay, the district of Ålidhem in the city of Umeå has been investigated. The method has been qualitative in the form of partly a field study of the district to investigate what kind of densification that has been done, partly an interview study with the inhabitants of Ålidhem to investigate their view of the changes. This essay is also based on the comprehensive plan for Umeå municipality, as well as other literature and studies of densification in Umeå municipality, but also nationally. Goals and legislation that concerns Swedish urban construction has been explored to investigate its influence on densification projects in Umeå. The two studies performed in this essay has been compared to the previous studies to make a conclusion. The result shows that there are several examples of densification projects in Sweden that have affected the social sustainability positively in each of the concerned districts. The examples can be compared to the densification in Ålidhem. When it comes to the field study, it shows that the district of Ålidhem has been densified in several ways. The interview study, as well as previous studies, conclude that the densification actions has been successful and something that the inhabitants appreciate.
159

Courtyards, an urban lifeline? / Bostadsgården, en urban livboj? : En studie om slutna och semi-slutna bostadsgårdars roll i nutida storstadsmiljö

Hellberg, Alice January 2023 (has links)
Even if the courtyard as a specific area lacks a clear description within PBL, there is a relatively unified view of what the courtyard is within research and academic work. The view of the courtyard as an extension of the living room has been repeated by several and suggests that the courtyard is a place that should accommodate and enable uses connected to the home. This common meaning is not only valid for our time but also historically. The Swedish courtyards have throughout history been marked as a compiling surface for what the home was unable to provide as well as being an insight into the spirit of the times. In a period where we live more isolated from our neighbors, the social context has changed, and the purpose of courtyards has become increasingly blurred.Based on three selected study areas, this paper aims to examine, from a planning perspective, the role of the Swedish courtyards in society and how they are used and can be used to fulfill more sustainable cities. Results show a generally passive attitude to the design of today's courtyards, where its outcome relies heavily on the developers' implementation. The result also shows the importance of creating spatiality, perceived emotions, and assets within the courtyard already during the planning stage in order to not only be able to offer attractive courtyards, but also sustainable environments within cities in a metropolitan environment. / Även om bostadsgården som specifik yta saknar tydlig skildring inom plan- och bygglagen (PBL) finns det inom forskning och verk en relativt enad syn på vad bostadsgården faktiskt är. Synen på bostadsgården som en förlängning av hemmet är en skildring som återkommer, vilken står för uppfattningen att gården är en plats som ska tillgodose och möjliggöra användning som är kopplat till hemmet. Denna gemensamma bild är inte bara giltig för vår tid utan även historiskt. Utöver att bostadsgårdar under historien utgjort en kompletterande yta till hemmet har de vidare speglat, och därmed även gett en insyn i, tidens anda. I en period där vi lever mer isolerat från våra grannar har gården som en självklar social yta ändrats och bostadsgårdars syfte har blivit alltmer suddigt. Baserat på tre utvalda studieområden har denna studie utifrån ett planeringsperspektiv undersökt bostadsgårdars roll i dagens samhälle, och hur de används och kan användas för att bidra till mer hållbara städer. Resultatet visar på en generellt passiv hållning till utformning av dagens bostadsgårdar, där utfallet till stor del överlämnas åt byggherrarna i själva genomförandefasen. Resultatet visar även på vikten att redan under planeringsskedet lägga fokus på att skapa rumslighet, planera för vilka känslor man tänker sig att bostadgården ska ge upphov till samt vilka funktioner gårdarna ska fylla. Detta för att inte bara kunna erbjuda attraktiva bostadsgårdar, utan även hållbara miljöer som en viktig beståndsdel i storstadsmiljöer.
160

Interdisciplinary and interspatial discrepancies in urban planning : a multi-actor-multi-criteria analysis of the effects of densification on accessibility and sustainability

van der Ham, Jelmer January 2022 (has links)
Density has increasingly been used as a strategy by urban planners to increase accessibility and urban sustainability. Particularly, it has been opted as a tool to achieve sustainable development goal 11 ‘inclusive, safe, resilient, and sustainable cities and human settlements’. Though densification is considerably impactful in realising resource efficiency and transport benefits, its effects are too multi-lateral to be used as a linear tool to realise accessibility and sustainability. This is both caused by the assume d knowledge-practice gap between academics and urban planners, as well as the complexity of interspatial collaboration between local and global practitioners. Particularly, the universal application of sustainable development goal 11 and the top-down approaches to evaluate performance in achieving sustainability hinder strategic interspatial integration. Fostering interspatial and interdisciplinary collaboration would require establishing a holistic indicator framework that acts as a foundation for contextualised project appraisal. Relevant topics were identified and validated by expert opinion to establish such an operationalised indicator framework that could be used as a foundation for practitioners to evaluate the effects of densification projects on accessibility and sustainability. To identify what topics planning actors across spatial scales (i.e., local, regional, and national)and between disciplines (i.e., academia and practice) value differently, the priorities of topics presented in the indicator list were compared by various stakeholders from the Greater Gothenburg region. Comparing priorities and identifying disparities was done using the methodological framework of the Analytical Hierarchy Process. More specifically, a multi-actor-multi-criteria analysis was used to compare priorities. The differences between responses showed that the gap between knowledge and adaptation might be smaller than initially suspected. Differences in priorities between planning actors across spatial scales shows interspatial discrepancies in mainly the valuation of public transport, urban services, and biodiversity conservatio n. Furthermore, notable differences in prioritisation by singular actors illustrate the need to qualitatively inquire certain topics further, including the role of inter-urban employment on transport networks, the incorporation of social factors in quantitative appraisal, the capacity of small municipalities to incorporate contextualised biodiversity conservation, and the role of a varied accommodation supply on metropolitan housing shortage.

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