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Space is a social product and a social producer. The main aim of this thesis is to reveal ‘the process of totalitarian city making in Pyongyang’, especially in the light of the interaction between the power and urban space.
The totalitarian city of Pyongyang was born out of modernization in the process of masses formation. During the growth of colonial capitalism and Christian liberal ideas, Pyongyang was modernized and displayed the characteristics of a modern city with industrialization and urbanization. During the introduction of Japanese colonial capitalism, peasants, women, and slaves became the first masses and urban poor, and they later transformed into the mob; their violence was finally demonstrated during the Anti-Chinese Riot.
After the 1945 independence, Kim’s regime formed the one-party state with a cry for revolution. They produced an atmosphere of imminent war to instill fear and hatred into the psyche of Pyongyang citizens. The regime eliminated all political opponents in 1967 and finally declared the totalitarian ideology in 1974. During this process, Pyongyang demonstrated two main characteristics of a totalitarian city: the space of terror and of ideology. The space of terror produces the fear of death and the space of ideology controls the thought and life of citizens.
After entry to the market, to keep Kim’s controlling power, the regime used the strategy of location exchange. The camp, market, and Foreign Currency Shop were effective tools to prepare for executives’ gifts. However, the market also produces the desire not only for consumption but also for freedom and truth; it is tearing down the foundation of the totalitarian city of Pyongyang.
This research focuses primarily on the interaction between political power and urban space. In the process of making a totalitarian city, the power produced urban space and it influenced the psyche of Pyongyang citizens. Even though this spatial transition has created the totalitarian city and helped maintain political power, it also led and produced intended or unintended social variation in Pyongyang society.
This research addresses the discourse of tourism as a tool for place-making of urban destination. Relevant to the study of place-making is the analysis of the commoditization and localization process dependent upon the appropriation of urban landscape and local cultures. In the research, localization is interpreted as the act of determining the attributes of locality, while commoditization is defined as the process by which local attributes that have commercial potential end up in becoming tourism commodity. Following this, the commoditization of intrinsic cultural value is disseminated within a branding strategy and intervention reflecting social and political relations. Therefore, the research suggests that tourism place-making has not only been constructed through the top-down regulatory body, but has been also generated through the attributes of its locality. By utilizing the critical and constructivist paradigm, the research depicts the conditions of the localization and commoditization process in establishing the base line of its realization within the symbolic economy. Thus, a qualitative case study approach was adopted. The study area of this dissertation is Palembang, as one of the capital cities in Indonesia advancing in its overall urban development. To investigate urban tourism as a tool for development strategy, it is useful to investigate the role of tourism which embodies (1) spatial transformation; how tourism gives significant impacts on urban form, and (2) the socio-cultural aspect; how neighbourhood is related to tourism industry. The findings suggest that tourism place-making involves the reciprocity of urban dynamics: cities take on tourism as a reference model of development, and tourist areas adopt the proliferation of cultural lifestyle to meet the industry’s demands.
The objective of this thesis was to understand the 20th-century history of informal urbanisation in Europe and its origins in Madrid and Paris. The concept of informal urbanisation was employed to refer to the process of developing shacks and precarious single-family housing areas that were not planned by the public powers and were considered to be substandard because of their below-average materials and social characteristics. Our main hypothesis was that despite being a phenomenon with ancient roots, informal urbanisation emerged as a public problem and was subsequently prohibited in connection with another historical process occurred: the birth of contemporary urban planning. Therefore, its transformation into a deviant and illegal urban growth mechanism would have been a pan-European process occurring at the same pace that urban planning developed during the first decades of the 20th century.
Analysing the 20th-century history of informal urbanisation in Europe was an ambitious task that required using a large number of sources. To contend with this issue, this thesis combined two main methods: historiographical research about informal urbanisation in Europe and archival research of two case studies, Madrid and Paris, to make the account more precise by analysing primary sources of the subject.
Our research of these informal areas, which were produced mainly through poor private allotments and housing developed on land squats, revealed two key moments of explosive growth across Europe: the 1920s and 1960s. The near disappearance of informal urbanisation throughout the continent seemed to be a consequence not of the historical development of urban planning—which was commonly transgressed and bypassed—but of the exacerbation of global economic inequalities, permitting the development of a geography of privilege in Europe.
Concerning the cases of Paris and Madrid, the origins of informal urbanisation—that is, the moment the issue started to be problematised—seemed to occur in the second half of the 19th century, when a number of hygienic norms and surveillance devices began to control housing characteristics. From that moment onwards, informal urbanisation areas formed peripheral belts in both cities. This growth became the object of an illegalisation process of which we have identified three phases: (i) the unregulated development of the phenomenon during the second half of the 20th century, (ii) the institutional production of “exception regulations” to permit a controlled development of substandard housing in the peripheral fringes of both cities, and (iii) the synchronic prohibition of informal urbanisation in the 1920s and its illegal reproduction.
There is a continuous exacerbation of environmental problems in big cities of today’s world, thereby, diminishing the quality of life in them. Of particular concern is the fact that today’s megacities are evolving in the developing world without corresponding growth in the economy, infrastructure and other human development indices. As urban population continues to grow in these cities of the Global South, governing institutions are usually unable to keep pace with their social responsibilities, thus, making the issue of urban governance very critical. This is because effective and efficient urban governance is highly essential for the creation, strengthening and sustenance of governing institutions.
Lagos, a mega-city of over 15.45 million people and the most populous metropolitan area on the African continent epitomizes the fundamental grave characteristics of the emerging megacities of the Global South, thereby, constituting an apt choice in understanding the emerging megacities of the next generation. Two out of every three Lagos residents live in slums and de-humanizing physical and social conditions. Many of them sleep, work, eat and cook under highway bridges, at the mercy of weather elements.
This research, therefore, evaluated urban governance through housing administration in Africa’s largest megacity. It examines the extent of housing problems in the city, the causal factors and the culpability of government agencies statutorily responsible for the provision, control and management of housing development in Lagos - the tenth largest city in the world. A representative geographic part of the city which manifests classic characteristics of slum life, listed by Mike Davis as the largest slum in Africa and the 6th largest in the world – Ajegunle - was adopted for case study. The research design combined rigorous literature search (desk research) with quantitative and, especially, qualitative approaches to data collection. The qualitative approach was more intensely adopted because government officials often respond to enquiries with ‘official answers and data’ which may not be reliable and the study had to rely on keen observation of physical traces, social interaction and personal investigation. The cross-sectional research method was adopted. Information was solicited from house-owners, building industry professionals, sociologists and officials of relevant government agencies, through research tools like questionnaires, interviews, focused group discussions and personal observations.
The analysis and discussion of these field data, in conjunction with the information from the desk research gave a better understanding of the status-quo, which informed the recommendations proposed in the dissertation for mitigating the problems. The research discovered that many of the statutory housing agencies have the capacity to effectively discharge their responsibilities. However, it was also shown that corruption and abdication of responsibilities by the staff of these agencies constitute primary causes of the chasm between the anticipated lofty outcome from the laudable building regulations/bye-laws and the appalling reality. It also discovered that lack of political will and apathy on the part of successive Governments of Lagos State to the improvement of housing conditions of the poor masses are major causes of the housing debacle in Lagos.
Several germane and realistic recommendations for redressing the situation were subsequently proffered. These include amongst others, the conduction of an accurate census for Lagos, in conjunction with credible international agencies, as a requisite basis for effective planning of any sort. The process of obtaining legal titles for land should also be made less cumbersome, while the housing administration process should be computerized; in order to reduce inter-personal contacts between applicants and government officials to the barest minimum, as a means of curbing the wide spread corruption in the system.
This is a work concerned with the increasing processes of social exclusion in cities nowadays. In approaching this phenomenon, the research highlights how people interact with their institutional environments. This is also, perhaps centrally, an investigation into the possibility to engage an individual perspective to understand the transformation in urban experience, which is orienting society to new uses and forms of exclusion. Following the perspective deployed by the so-called “sociology of individuals” in French sociology or “reengagement of agency” in the Anglo-Saxon world; I claim that individuals as well as collectives are gaining increasing power to question and re-organize institutions. This re-organization, in the case of socio-urban institutions, is no guarantee for major levels in integration, cohesion, and equality. Unfortunately, social institutions are becoming hard in its exclusionary capabilities under people intervention during the last four decades.
I believe that urban sociology is a field of struggle between different perspectives competing to “make sense” of social phenomena in cities. The orientation supported in this research is just one on many and it follows the roots of people and their life experiences within cities and how they influence the processes that shape the city. The last formulation is possibly not the clearest, because as we all know, references to “inhabitants” are presented in every variant of urban sociology. Nevertheless, there are not many variants focusing on peoples’ capability to influence institutional environments and by this way affecting the urban condition in which they find themselves. The particular institution selected for this study is the “School”.
This thesis is organized around two parts: part one includes the conceptual framework, methodological approach, and historical contextualization; part two describes three case studies produced to analyse the forms of and the relations between individuals and school institution. Part one starts from a premise: within the context of declining welfare State in the case of industrialized countries, an important part of urban studies focuses on economic and spatial restructuration. Confronted with the same situation, a part of social sciences shifts to the individuals’ agency and social uncertainty. This research is embedded in the last theoretical description presented above, thus, because it tries to observe urban processes from the perspective of the individual and outside of developed economies. In this sense, Latin America represents a fundamental reference because urban conditions are historically marked by weak institutional arrangements to integrating people and large levels of marginality and exclusion among population. In this scenario individuals’ practices around inclusion-exclusion have an essential meaning in everyday life.
Part two offers three study cases in which the relation between individuals and school institutions has been analyzed for the Metropolitan area of Santiago de Chile (MAS). Using different methodological resources an exhaustive account on three levels is presented: i) geo-referencing State intervention in public policies connected with neighborhood and schools to understand the form and extent of socio-urban exclusion in MAS, ii) narrative biographies applied to parents with children attending primary school, in order to reconstruct the familiar process of school selection and describing its impacts on the stabilization of school as an exclusionary device, and iii) autoethnography to describe in detail the temporal dimension involved in stabilizing actions which reinforces social mechanisms of urban integration-exclusion during the last three decades in Chile.
A key argument advanced by this research proposes that: the way in which the idea of integration is enacted by people in their biographical careers imprints changes on the institutional orientation and by this way, contributes to the reorganization urban life. The high level of social exclusion in Santiago de Chile is not accountable without considering transformation in all socio-urban institutions, especially the school. No family considers social integration with people from a low social, economical or cultural background as relevant orientation for school selection. This particularity of the Chilean social reality is not derivable from any big capitalistic or modernization processes impacting our cities.
Within the light of the thesis findings, I conclude that socio-urban institutions logics must be reassessment under the influences of people actions and representations. I also propose a consideration to major complementarities between urban studies and urban-institutions analysis. The school institutions is not just a sectorial field reserved to the researcher in education, on the contrary, it represent a key entrance to address people’s experience in their institutional urban environments. The re-emergence of social and urban movements in 2010, under the “Arab Spring” or the “Chilean Student Movements”, is not only a demonstration in the public space as result of major global trends. These situations are in essence, for this research, individuals gathering together and calling for recognition and autonomy inside institutional environment that tends to reject them. Similar situation was the focus of the Latin American urban sociology research, within the focus on grassroots and urban social movements at the end of the 1960s and beginning of the 1970s.
In both cases, socio-urban institutions, unaware of recognition requirements claimed by inhabitants, are not beyond individual or collective reach. My main concern is to show that socio-urban institutions are constantly re-shaped as a result of individual action, what makes the difference, is the spirit that we all, socially, imprint on the logics of our socio-urban institutions, moving them to inclusion or exclusion.
The thesis concerns a work of urban history intended not to describe the city but rather to interpret it. By doing so, I have interpreted the city by means of the role played by the so-called ‘great property’ in the European city-making process during the last three decades of the 20th century, specifically focused on the concrete case of military properties in Italy. I have also considered the role played by other kinds of great properties, i.e. industries and railway, which previously acted in the production of the built environment in a different way respect to the military one. As all of them have as common denominator the fact of being ‘capital in land’, I analysed great industrial and railway properties in order to extrapolate a methodology which helped me to interpret the relationship between military properties and city-making process in Europe in the late 20th century.
I have analysed the relationship between the capital in land and the city-making process on the ground of the understanding the interrelation between the great property, the urban development, and the agents involved in the urban and territorial planning. Here I have showed that urban planning is not the decisive factor influencing the citymaking process, but instead the power held by the capital in land. I have found that is the great property the trigger of the creation of new ‘areas of centrality’ intended as large areas for consumerism. As far as the role played by great property is concerned, I have also discovered that it has evolved over time. Originally, industrial and railway properties have been regenerated into a wide range of new profit-driven spaces; successively, I have found out that most of the regeneration of military premises aimed to materialise areas of centrality. The way of interpreting this factor has been based on focusing my attention on the military premises in Italy: I have classified their typology when they have been built and, most importantly, when they have been regenerated into new areas of centrality.
One of the main focuses of recent Chinese urban development is the creation and retrofitting of public spaces driven by the market force and demand. However, researches concerning human and cultural influences on shaping public spaces have been scanty. There still exist many undefined ambiguous planning aspects institutionally and legislatively. This is an explanatory research to address interactions, incorporations and interrelationship between the lived environment and its peoples. It is knowledge-seeking and normative. Theoretically, public space in a Chinese context is conceptualized; empirically, a selected case is inquired. The research has unfolded a comparatively complete understanding of China’s planning evolution and on-going practices. Data collection emphasizes the concept of ‘people’ and ‘space’. First-hand data is derived from the intensive fieldwork and observatory and participatory documentations. The ample detailed authentic empirical data empowers space syntax as a strong analysis tool in decoding how human’s activities influence the public space. Findings fall into two categories but interdependent. Firstly, it discloses the studied settlement as a generic, organic and incremental development model. Its growth and established environment is evolutionary and incremental, based on its intrinsic traditions, life values and available resources. As a self-sustaining settlement, it highlights certain vernacular traits of spatial development out of lifestyles and cultural practices. Its spatial articulation appears as a process parallel to socio-economic transitions. Secondly, crucial planning aspects are theoretically summarized to address the existing gap between current planning methodology and practicalities. It pinpoints several most significant and particular issues, namely, disintegrated land use system and urban planning; missing of urban design in the planning system, loss of a human-responsive environment resulted from standardized planning and under-estimation of heritage in urban development. The research challenges present Chinese planning laws and regulations through urban public space study; and pinpoints to yield certain growth leverage for planning and development. Thus, planning is able to empower inhabitants to make decisions along the process of shaping and sustaining their space. Therefore, it discusses not only legislative issues, concerning land use planning, urban design and heritage conservation. It leads to a pivotal proposal, i.e., the integration of human and their social spaces in formulating a new spatial strategy. It expects to inform policymakers of underpinning social values and cultural practices in reconfiguring postmodern Chinese spatiality. It propounds that social context endemic to communities shall be integrated as a crucial tool in spatial strategy design, hence to strengthen spatial attributes and improve life quality.
Abstract
In this research, based on socio-spatiality as the starting point, it has conducted extensive city space analysis to advance a new urban social space theory. Resting upon the basis of traditional continent philosophy, this social space theory has adopted the structuration methods, at the same time trying to build certain combination between theoretical frame work establishment and empirical observations. Therefore, the socio-spatial transition study is neither a macro theory of traditional structuralism nor a typology of urban planning theory, or a positivism social geography, but an operative theory on practical purpose. Firstly, what’s distinct from the traditional structuralism is that this study examines the endless transiting structural relations, not macroscopic narrations of absolute definition and structure. In fact, any city and space are always co-existed in their structurational transiting relationship, thus research in transition has become the main body of this study. And case study is a must for research in transition, as part of efforts to apply the structuration concept into practice reason. Secondly, this study first establishes the fundamental structuration concept of socio-spatial transition, which, as an operative tool, is applied to conduct transition analysis on specific case about the City of Beijing. Therefore, as a social space theory, referring to as science, remains criticism of traditional continent philosophy. However, this criticism did not working on the level of ideology or conceptions, but on transiting under structural relations, keeping it from incompetent ideology criticism of continental critical theory. Unfortunately contemporary urban and space development have now gone extremely unbalanced under a background of globalization; yet traditional macro theories are incapable of either producing significant impact on practice or helping people identify practical problems. While facing general issues, particularly the Chinese urban issue category established on a meta-structured city mode, the micro-case study has plunged into dilemma for unknowing either to ask questions or to answer questions. Therefore, this study is set to identify dilemma and find direction for future relevant research. In this dissertation, Beijing is used as a model, and structuration methods as tools. It has extensively analyzed the social-spatial transition of the city space of Beijing, acquiring brand-new knowledge of its urban space development. It is helpful to an in-depth understanding of the city space development not only in Beijing, but also in many other cities that were influenced by the capital model of Beijing. Since the start of reform and opening-up, China has created a unique development mode of the new-styled metropolitan and urbanization in history. This research is expected to analyze or decode what China’s urban development in between communal space and associative space.
This thesis examines urban partition in Nicosia, the capital of Cyprus, and how its changing roles and shifting perceptions in a post-conflict setting reflect power relations, and their constant renegotiation. Nicosia, the capital of Cyprus, was officially divided in 1974 in the aftermath of an eighteen-year-long conflict between the island’s Turkish- and Greek-Cypriot communities. As a result, a heavily militarized Buffer Zone, established as an emergency measure against perpetuation of intercommunal violence, has been cutting through its historic centre ever since.
This thesis departs from a genuine interest in the material and ideational dimensions of urban partition. How is it constructed, not merely in physical terms but in the minds of the societies affected by conflict? How is it established in official and everyday discourses? What kinds of mechanisms have been developed to maintain it, and make an inseparable part of the urban experience? Moreover, taking into account the consensus in relevant literature pertaining to the imperative for its removal, this thesis is inquiring into the relevance of peace agreements to overcoming urban partition. For this purpose, it also looks at narratives and practices that have attempted to contest it.
The examples examined in this thesis offer pregnant analytical moments to understand Nicosia’s Buffer Zone as a dynamic social construct, accommodating multiple visions of and for the city. Its space ‘in-between’ facilitates encounters between various actors, accommodates new meanings, socio-spatial practices and diverse imaginaries. In this sense, urban partition is explored in this thesis as a phenomenon that transcends scales as well as temporalities, entwining past, present, and future.
Settlement is human place to live and do various activities (Finch, 1980). Concept of settlement layout is closely associated with human and a set of thoughts and behaviors. In this case, idea of pattern of activities in a society that is core of a culture becomes main factor in process of formation of houses and environment in a settlement. Factors which affecting form (physical) of architecture in a settlement environment are socio-cultural, economic, and religious determinant factor that manifested architectural realization (Rapoport, 1969).
Yogyakarta as the continuation of kingdom city in the Java Island finally exists as an Islamic kingdom that still remain to survive up to now. Impacts of this issue is appearance of various Moslem settlements to support typical character of an Islamic Kingdom.
Mlangi is an area of oldest Moslem settlements in Yogyakarta has not been explored in details for progress especially in physical glasses recently. Everything basic group and individual who arrange houses and residences, starts from how it has spatial concept alone. Although concept is a very abstract thing to explain in details, but its existence can be detected by how they created their physical environment.
This research conducted by these research questions: (1) What are spatial concepts owned by people in Mlangi and (2) How do spatial concepts owned by the people affect the settlements pattern?
Process to search spatial concept owned by the people in Moslem residence, making Mlangi as study area, was approached by using phenomenological research method. The researcher have to self-involved directly in unstructured interviews, but remained in guideline framework of in interviews to make research process effective. Fistly, the researcher interviewed the key person, they are the head of Mlangi administration (pak Dukuh) in Mlangi and Sawahan. They were then give advices to who was capable person that could draw the spatial concept and had many story and knew the history of the settlements. Step by step of interview guided from one informant to next informant when the information had been told repeatedly. The next informant based on the last informant advice or who had close relationship with the last theme appeared. To complete the narration and draw the result of interview, researcher have to add additional information with photograph and descriptive picture that can be draw the settlement empirically.
In process, 17 information units which found in field were consistent with sequence of interview events and flowing of theme to theme associated with Moslem residence of residence. Finally the interviews succeeded in abstracting 16 themes that may be classified into historic, socio-cultural, and spatial-concept dimensions in Mlangi. Process of analysis to find spatial concept owned by the people in Moslem settlements was carried out by dialogue of themes to find available substantive relationship.
Four concepts successfully analyzed consist of concepts of personage, concept of religious implementation, concept of Jero-Jaba and concept of Interest. The four concepts are really associated with one and others in understanding how spatial concept owned by the people affects residence they occupy. Yet, concept of Jero-Jaba bases all concepts of people in Mlangi . This concept can be used to draw red yarn on how they utilize communal spaces in residence and layout rooms of their individual houses. This concept also eternalize residence patterns existing in Mlangi now where residence does not experience many changes from starting of this residence existence (from detection of generation currently still living), namely residence patterns concentrate on orientation to Masjid Pathok Negoro of Mlangi.
This research was opening the potential research area, at least for the sociology, anthropology and demography research interest. So many unique character in Mlangi if looked at from how they maintain their spatial concept and manifested in their daily activities. How the people will concern only for the religious activities and the economic concern only for survival aspect in live.
Keywords: spatial concept, moslem settlements, phenomenology method, Indonesia,
This dissertation attempts to describe, analyze and evaluate how the settlement spaces of Chinese clans in rural areas were shaped by local clan lives in ancient times and transformed along with the transition of those clan organizations in modern China. In approaching this subject, two major questions are raised: what was the role of ancient Chinese rural clans in the spatial formation of their settlements and, nowadays, do they still play the same role as before?
To approach these answers, this dissertation sets out to draw on systematically interdisciplinary research from the perspectives of socio-culture and architecture- planning to have an overall understanding of a Chinese clan organization and clan settlement. Then, the basic characteristics of traditional Chinese clans and their importance to the Chinese people are discussed by tracing the history and evolution of Chinese clan organizations in the dissertation.
Two old villages, Furong and Cangpo in now Wenzhou, Zhejiang Province, are selected for case study research. And the research reveals that it was the clans that took charge of planning and managing the various construction activities, especially those of communal buildings and facilities, within their own settlements, and the clan lives exerted a decisive impact on shaping the settlement spaces, branding the characteristics of the clan lives clearly and deeply on the spaces. Following that, in the dissertation is described the transformation process of traditional Chinese clans in modern and contemporary China. The clan lives in rural areas have been reshaped and this exerts a great impact on clan settlement spaces. It is shown in the case studies of Furong and Cangpo.
The Variability of the Void Ratio of Sand and its Effect on Settlement and Infinite Slope Stability
(2018)
The uncertainty of a soil property can significantly affect the physical behavior of soil, so as to influence geotechnical practice. The uncertainty can be expressed by its stochastic parameters, including the mean, the standard deviation, and the spatial correlation length. These stochastic parameters are regarded as constant value in most of the former studies. The main aim of this thesis is to prove whether they are depth-dependent, and to evaluate the effect of this depth-dependent character on both the settlement and the infinite slope stability during rainwater infiltration.
A stochastic one-dimensional settlement simulation is carried out using random finite element method with the von Wolffersdorff hypoplastic model, so as to evaluate the effect of stress level on the stochastic parameters of void ratio related parameters of sand. It is found that these stochastic parameters are both stress-dependent and depth-dependent.
The non-stationary random field, considering the depth-dependent character of these stochastic parameters, can be generated through the distortion of the stationary random field.
The one-dimensional settlement analysis is carried out to evaluation the effect of the depth-dependent character of the stochastic parameters of void ratio on the strain. It is found that the depth-dependent character has low effect on the strain.
The deterministic analysis of infinite slope stability during rainwater infiltration is simulated.
The transient seepage is carried out using finite difference method, while the steady state seepage is simulated using the analytical solution. The saturated hydraulic conductivity (ks) is taken as the only variable. The results show that the depth-dependent ks has a significant influence on the stability of the slope when the negative flux is high. Without considering the depth-dependent character, can overestimate the factor of safety of the slope. A slope can fail if the depth-dependent character is considered, while it is stable if the depth-dependent character is neglected. The failure time of the slope with a greater depth-dependent ks is earlier during transient infiltration.
Meanwhile, the stochastic infinite slope stability analysis during infiltration, is also carried out to highlight the effect of the depth-dependent character of the stochastic parameters of ks. The results show that: the probability of failure is significantly increased if the depth-dependent character of mean is considered, while, it is moderately reduced if the depth-dependent character of the standard deviation is accounted. If the depth-dependent character of both the mean and standard deviation of ks is considered, the depth-dependent mean value plays a dominant influence on the results. Furthermore, the depth-dependent character of the spatial correlation length can slightly reduce the probability of failure.
Gegenstand der Arbeit ist die Untersuchung der bei der Herstellung von Branntkalk-Boden-Säulen auftretenden thermischen Effekte und ihres Einflusses auf Wasser- und Wasserdampftransporte im Boden. Die Erwärmung beruht vorrangig auf einer chemischen Reaktion, bei der das dem Boden zugemischte Calciumoxid mit Bodenwasser unter Freisetzung von Wärmeenergie zu Calciumhydroxid reagiert. Hierzu wurden zunächst die thermischen Eigenschaften feinkörniger Böden und ihre Beeinflussung durch das Herstellen des Bindemittel-Boden-Gemisches in situ untersucht. Weiterhin wurden Untersuchungen zum zeitlichen Verlauf der chemischen Reaktion und zur Größe der dabei freigesetzten Reaktionswärme vorgenommen. Mit dem Vorhaben, die mit der Säulenherstellung einhergehenden Temperaturfeldänderungen zu erfassen, wurden danach die thermischen Anfangs- und Randbedingungen des Bodens und der Bodenoberfläche untersucht und festgelegt. Anschließend wurden die zeitabhängigen Temperaturfeldänderungen auf der Grundlage der Wärmeübertragung durch Wärmeleitung mit Hilfe des Finite-Elemente-Methode Programms Ansys® 6.1 numerisch simuliert. Das Finite-Elemente-Modell wurde durch die Nachrechnung von Feldversuchen verifiziert. Im Rahmen der Finite-Elemente-Berechnungen wurde die infolge der Hydratation des Branntkalkes stattfindende Erwärmung des Bindemittel-Boden-Gemisches und des angrenzenden Bodens simuliert und hinsichtlich relevanter Einflussgrößen überprüft. Untersucht wurde der Einfluss herstellungsbedingter Faktoren wie Bindemittelkonzentration, Säulendurchmesser und Säulenanordnung sowie der Einfluss natürlicher Faktoren wie Trockendichte und Sättigungsgrad des Bodens. Die mit Hilfe der Finite-Elemente-Methode ermittelten zeitabhängigen, im Boden auftretenden Temperaturgefälle bilden die Grundlage für die Untersuchung der thermisch bedingten Wassertransportvorgänge in der Stabilisierungssäule und deren Umfeld. Zu diesem Zweck wurde die durch die Temperaturfeldbeeinflussung geänderte energetische Situation des Bodenwassers analysiert. Auch nicht-thermische, infolge der Säulenherstellung auftretende Effekte wie die durch den >Stopfeffekt< bedingte lokale Sättigungsänderung und die Beeinflussung des osmotischen Potentials einschließlich der daraus resultierenden Wasserbewegungen wurden berücksichtigt. Alle thermisch verursachten Wasser- und Dampfflüsse bewirken ein Abströmen von Porenwasser aus dem stabilisierten Erdkörper in den umliegenden Boden. Baupraktisch bleiben die durch thermische Einflüsse hervorgerufenen Wassertransportvorgänge aufgrund ihres geringen Betrages jedoch unbedeutend. In abschließenden Temperaturfeldberechnungen wurden die thermischen Bodenkennwerte an die sich zeitlich verändernde Wassersättigung des Bodens angepasst. Anhand der ermittelten Temperaturverläufe wurde aufgezeigt, dass der Einfluss der Sättigungsänderung auf die Berechnungsergebnisse sehr gering ist, und damit die Voraussetzung für die vorangegangene entkoppelte Betrachtung des Wärme- und Massestromes erfüllt ist. Aufgrund dieser Ergebnisse muss der mehrfach in der Literatur zitierte, auch mit der tiefgründigen Bodenstabilisierung in Zusammenhang gebrachte, Einfluss der Erwärmung auf die Verdunstung des Bodenwassers kritisch betrachtet und in Frage gestellt werden. Voraussetzung hierfür ist der Transport von Wasser an die Bodenoberfläche. Nennenswerte, auf Temperatureinflüssen beruhende Wasserbewegungen sind, wie die Berechnungsergebnisse gezeigt haben, nicht zu erwarten. Weitere Untersuchungen zur Festigkeitsentwicklung von Branntkalk-Boden-Säulen und deren Vorhersage sollten sich daher auf die mechanischen Effekte und auf die mineralogisch-chemischen Prozesse, wie die puzzolanischen Reaktionen, und die Möglichkeiten ihrer Prognose konzentrieren. Die Berechnungen haben gezeigt, dass die Temperaturentwicklung in der Stabilisierungssäule im Wesentlichen durch die Bindemittelkonzentration, und ihr Auskühlungsverhalten vorrangig durch ihre geometrischen Abmessungen bestimmt wird. Diese Sachverhalte sind von den Bodenparametern, der für die Stabilisierung in Frage kommenden Böden, weitestgehend unabhängig. Temperaturmessungen stellen daher ein geeignetes Mittel zur Qualitätssicherung bei der Herstellung von Branntkalk-Boden-Säulen dar, mit deren Hilfe sich Inhomogenitäten bei der Bindemittelverteilung oder Störungen beim Hydratationsvorgang (Ablöschen des Branntkalkes) nachweisen lassen. Entsprechende Hilfsmittel wurden angegeben.
Heat, gas, and leachate are primary by-products of landfill processes in municipal solid waste landfills. In nuclear waste repository, temperature of the waste also raises due to radioactivity processes. Temperature increase in the repository induces hydro-mechanical processes of its sealing material. Moderate to high temperature is expected to be encountered in the field situation. In this thesis, a study on the thermo-hydro-mechanical behavior of compacted bentonite-sand mixtures which are among the materials proposed to be used as sealing material for landfills and hazardous waste repository is presented. Mixtures of a calcium-type bentonite, Calcigel, and quartz sand were used in this study. Series of tests including suction and swelling pressure measurement, drying-wetting under unconfined and confined conditions were conducted at a moderately high temperature. Tests at room temperature including basic and physico-chemical characterization, microstructure and fabric studies, and osmotic suction were conducted in order to provide insight into understanding the hydro-mechanical processes taking place in the bentonite. The experimental data obtained are presented and compared to the result of the previous tests for the same material performed by other researchers at room temperature. The changes in hydro-mechanical behavior due to elevated temperature were analyzed and discussed based on the suction components of soil which are influenced by temperature. At the end, conclusions concerning the temperature effects on the hydro-mechanical behavior of the materials are drawn and suggestions for future studies are made.
The underlying goal of this work is to reduce the uncertainty related to thermally induced stress prediction. This is accomplished by considering use of non-linear material behavior, notably path dependent thermal hysteresis behavior in the elastic properties.
Primary novel factors of this work center on two aspects.
1. Broad material characterization and mechanistic material understanding, giving insight into why this class of material behaves in characteristic manners.
2. Development and implementation of a thermal hysteresis material model and its use to determine impact on overall macroscopic stress predictions.
Results highlight microcracking evolution and behavior as the dominant mechanism for material property complexity in this class of materials. Additionally, it was found that for the cases studied, thermal hysteresis behavior impacts relevant peak stress predictions of a heavy-duty diesel particulate filter undergoing a drop-to-idle regeneration by less than ~15% for all conditions tested. It is also found that path independent heating curves may be utilized for a linear solution assumption to simplify analysis.
This work brings forth a newly conceived concept of a 3 state, 4 path, thermally induced microcrack evolution process; demonstrates experimental behavior that is consistent with the proposed mechanisms, develops a mathematical framework that describes the process and quantifies the impact in a real world application space.
Die Energieversorgung auf der Erde wird zukünftig zu einem Problem. Bedingt ist dies durch eine fortschreitende Verknappung der natürlichen Ressourcen, wie Kohle, Gas und Öl sowie einer Zunahme der CO2-Konzentration und anderer Schadstoffe in der Atmosphäre. Regenerative Energiequellen müssen genutzt werden, um den steigenden Energiebedarf zu sichern. Eine interessante Möglichkeit zur Nutzung der Solarenergie stellt das Aufwindkraftwerk dar. Das Aufwindkraftwerk besteht aus einem Kamin, um den ein Glasdachkollektor auf dem Erdboden angeordnet ist. Am Fuße des Kamins befinden sich Turbinen und Generatoren. Die einfallende Solarenergie wird hauptsächlich über die Wechselwirkung mit dem Erdreich in thermische Energie, in kinetische Energie, in Rotationsenergie und in elektrische Energie umgewandelt. Das Ziel der Arbeit bestand in der physikalisch-mathematischen Modellierung, der genaueren Erkennung des Wirkprinzips und der Diskussion der Anlagenparameter Leistung und Wirkungsgrad. Im Rahmen dieser Aufgabe wurden dazu stationäre und instationäre Computational Fluid Dynamic (CFD) Modelle und stationäre und instationäre vereinfachte Modelle entwickelt, diskutiert und miteinander verglichen. Grundlegend neue Erkenntnisse wurden bei den Verläufen der Temperaturen im Kollektor, insbesondere der Erdoberflächentemperatur erreicht. Parameteranpassungen im Wärmeübergangsmodell und Widerstandsmodell führten für vier ausgewählte, stationäre Sonnenenergien auf eine gute Übereinstimmung zwischen den Ergebnissen (Temperaturhub, Druckentnahme, Leistung und Wirkungsgrad) des stationären, hybriden Modells und des stationären CFD-Modells. Weiterhin stimmen die lokalen Größen Wärmeübergangskoeffizient, Erdoberflächentemperatur, Lufttemperatur und Glasdachtemperatur gut zwischen den Modellen überein. Mit dem CFD Modell wurden der Prototyp und 3 Großkraftwerke berechnet. Mit dem entwickelten instationären FDM-Modell wurden erstmalig numerische Langzeitsimulationen (1 Jahr) durchgeführt. Zur Überprüfung des Modells wurden die Ergebnisse mit Messwerten aus Manzanares verglichen, wobei eine gute Übereinstimmung erreicht werden konnte. Das Verständnis für die stattfindenden thermodynamischen und strömungsmechanischen Prozesse in einem Aufwindkraftwerk konnte durch die Arbeit maßgeblich verbessert werden.
The thesis addresses journalistic, administrative and judicial historical documentation to analyze the links between aridity and geographical imaginaries in the province of Catamarca (Argentina), from a historical point of view. The research aims to contribute to the understanding of the "non-hegemonic" versions of Modernity, its territoriality and the productions of geographic imaginaries that they involve. To provide a broad purpose, it raises as an object of study the ways in which "modern" practices, actors, links, discourses and expectations about the territory are mobilized when they are located in a space in "other" water conditions. those that are intended to "civilize" it.
The general objective of the research is to analyze time-space controversies around water in the city and valley of Catamarca towards 19th and 20th centuries. The specific objectives derived are a) analyzing how various actors are related to waters behavior - in other words, the local water regime – in Catamarca and the meanings built around it. b) to analyze the controversies about the place of Catamarca and its water regime in the local and national geographic imaginary. c) analyze controversies in which the relationships between actors and materialities involved in modernization projects are put into discussion.
These concerns by the experience of the actors and by the historical-spatial imagination of the territory, combined, led to the construction of an interdisciplinary methodology based on tools from anthropology, sociology, geography and history.
Druckbeanspruchte Bauteile aus Beton können mit zugfesten Umschnürungen von außen verstärkt werden. Mit dieser etablierten Methode konnten axiale Traglast und Duktilität von unzureichend bewehrten Stützen bereits verbessert werden. Es wurde jedoch festgestellt, dass der umschnürte Betonkern dennoch an Festigkeit verliert. Um die Wirksamkeit der Umschnürung zu erhöhen, wird deshalb vorgeschlagen, das umschnürende Material vorzuspannen. Dieser Vorschlag wird insbesondere von der neuen Materialgruppe der Formgedächtnislegierungen inspiriert, die thermisch vorspannbar sind.
Bisher sind die Auswirkungen der Vorspannung einer Umschnürung auf das Tragverhalten von Betondruckgliedern kaum untersucht worden. Diese Lücke wird durch systematische Versuche an Betonzylindern mit vorgespannter Umschnürung aus Stahl und kohlenstofffaserverstärktem Kunststoff geschlossen. Die Abbildung der Versuchsergebnisse durch geeignete Modelle ermöglicht auch Aussagen zum Verhalten von Betondruckgliedern mit Umschnürungen aus anderen Materialien, beispielsweise Formgedächtnislegierungen. Um diese in den Berechnungen zu simulieren, wird eine für das Bauwesen infrage kommende eisenbasierte Legierung in separaten axialen Versuchen charakterisiert und thermisch vorgespannt. Die in der vorliegenden Arbeit entwickelten neuen Modelle orientieren sich im Wesentlichen an zwei Zielen: dem Abbilden des mehraxialen Spannungs-Dehnungs-Verhaltens des vorgespannt umschnürten Betons und dem Berechnen der Restfestigkeit des Betons.
Die durchgeführten Versuche und Parameterstudien auf Basis der Modelle zeigen: Die Vorspannung der Umschnürung beeinflusst vor allem die Restfestigkeit des Betons wesentlich. Die gewonnenen Erkenntnisse und neuen Methoden können eingesetzt werden, um das Tragverhalten von Betondruckgliedern mit Umschnürungen aus Stahl, faserverstärktem Kunststoff oder Formgedächtnislegierungen zu bewerten.
Transformation of the Environment: Influence of “Urban Reagents.” German and Russian Case Studies
(2021)
An urban regeneration manifests itself through urban objects operating as change agents. The en-tailed diverse effects on the surroundings demonstrate experimental origin - an experiment as a preplanned but unpredictable method. An understanding of influences and features of urban ob-jects requires scrutiny due to a high potential of the elements to force an alteration and reactions. This dissertation explores the transformation of the milieu and mechanisms of this transformation.
Der Autor, Berater und Gutachter für das Thüringer Ministerium für Soziales und Gesundheit und Mitverfasser der Thüringer Landespflegepläne, systematisiert und analysiert die Struktur und Situation pflegebedürftiger Menschen und deren Inanspruchnahme sozialer Pflegeinfrastrukturen im räumlichen und demographischen Kontext. Im Mittelpunkt dieser regionalwissenschaftlichen Forschungsarbeit stehen räumliche Disparitäten der Versorgungs- und Angebotssicherung sowie bisher kaum betrachtete räumliche Strukturen und Interdependenzen der Pflegebedürftigkeit und Pflegeleistungen. Hierzu wurden vom Autor mehrere regional differenzierte Datenerhebungen aller teilstationären und vollstationären pflegebedürftigen Menschen und der Pflegeinfrastruktureinrichtungen im Freistaat Thüringen durchgeführt.Durch die Integration explorativer Analysemethoden in die empirische Regionalforschung wird die Pflegelandschaft Thüringens für den Zeitraum 1994 bis 2000 dokumentiert und anhand eines relationalen Indikatorensystems die Strukturen und räumlichen Muster der Pflegebedürftigkeit und -infrastruktur, soziodemographischen und raumstrukturellen Einflusskomponenten sowie pflegespezifische Interdependenzen exploriert und analysiert. Ein Ergebnis sind typologische Aussagen zum Alter, zur Pflegeart und -schwere oder Struktur der Pflegeleistungen in einer hochauflösenden topologischen Differenzierung nach regionaler Herkunft pflegebedürftiger Menschen. So hat die Einführung der Pflegeversicherung die Situation der meisten pflegebedürftigen Menschen in Thüringen deutlich verbessert. In der Zeitreihenuntersuchung treten diese Anfangserfolge aber hinter identifizierten Problemlagen aus z.B. sukzessiver Polarisierung der Pflegeleistungen, wachsenden Infrastrukturdisparitäten mit exakt quantifizierbaren Wanderungsbewegungen pflegebedürftiger Menschen zurück. Ein Ergebnis topologischer Analysen sind regionale (Versorgungs-) Disparitäten, die zu nachgewiesenen Wanderungsbewegungen pflegebedürftiger Menschen führen.So resultiert die noch nachweisbare Leistungs- bzw. Funktionsfähigkeit der Pflegelandschaft Thüringens (im Sinne der pflegerischen Grundversorgung einer Teilkaskoversicherung) primär aus noch günstigen Rahmenbedingungen wie dem „selbstverständlich“ erbrachten informellen Pflegeleistungen (der Frauen und Töchter) und nur sekundär (oder kaum) aus der durchaus noch guten finanziellen Situation der Pflegeversicherung. Ferner konnte gezeigt werden, dass wachsende Versorgungsdisparitäten nur anteilig eine Infrastrukturproblematik darstellen.Die Ergebnisse werden im Hinblick auf die entwickelten Methoden und weiteren Untersuchungen diskutiert und im Kontext des theoretischen Teils u.a. zur Entwicklung der Altenhilfe, Pflegeversicherung und sozialen Infrastrukturversorgung betrachtet und vor den Konsequenzen des demographischen Wandels reflektiert. Mit den Untersuchungsergebnissen fordert der Autor, dass Alterung und Schrumpfung der Bevölkerung in Teilräumen als dominante Entwicklung nicht verleugnet werden darf, damit durch eine integrative Gesamtsicht einer auch sozial nachhaltigen Raumentwicklung die pflegespezifische Forderung nach einem möglichst selbstbestimmten und selbständigen Leben (im eigenen Haushalt) gewahrt und das Grundrecht auf Würde auch pflegebedürftiger Menschen gewährleistet bleibt.Dazu wird vorgeschlagen, mit einer modernen Regionalforschung, die durch hochauflösende Datenerfassung, neuen explorativen statistischen Analysemethoden und in Verbindung mit aussagekräftigen Visualisierungsverfahren ein qualifiziertes Monitoring- und Analysesystem für die Raumbeobachtung aufzubauen, um Problemregionen rechzeitig identifizieren und Planungen zeitnah initiieren zu können.