Consommation ostentatoire | EPFL Graph Search

thumb|L'automobile de luxe, symbole de l'objet de consommation ostentatoire. La consommation ostentatoire est une consommation destinée soit à mettre en évidence son statut social ou son mode de vie, soit à faire croire aux autres que l'on possède ce statut social ou mode de vie. Concept Le concept de consommation ostentatoire est originellement utilisé pour décrire la consommation des classes supérieures dans les pays occidentaux par les sociologues. Il s'applique pour étudier le comportement de consommation des nouveaux riches des pays émergents, ainsi que celui des classes moyennes et pauvres de toutes les sociétés. Il s'agit d'une manifestation de la puissance pécuniaire. Le concept est travaillé par Thorstein Veblen, économiste américain, qui l'appelle conspicuous consumption. Il est défini pour la première fois en 1899 dans l'ouvrage Théorie de la classe de loisir. Dans cette étude de la très haute bourgeoisie nord-américaine, Veblen remarque des gaspillages ostenta

Towards Solar Decathlon: Concepts for a Sustainable Urban Water Management in a new eco-district

Gianluca Antonio Paglia

Water is rarely considered to be a crucial aspect in sustainable housing. In fact, water sustainability in eco-districts and in ecological architecture is frequently limited to recycling and reuse solutions. Why less water? What could explain the choice of an installation, of a specific strategy or of a criterion trying to decrease water needs? Terms as ecological footprint or sustainability are becoming more and more used, however, how can sustainability be measured? What does sustainable water mean? What are the parameters that quantify the ecological footprint of a water management system? Within this project, some possible concepts of optimization and valorization of sustainable urban water system have been defined and explored. Numerous studies about water management, water distribution, sanitary technologies, recycling, etc. have already been done. Nevertheless, it is less common to identify the reasons that are able to justify a reduced consumption of water. Eco-district labels propose several solutions for sustainable water, however they are limited by scale or simply focused on one stage of the water cycle. The aim of this project is then to consider water from a larger point of view: through a Life Cycle Analysis approach, needs and properties of different urban water management systems are compared and evaluated. The scale considered for such reflections is effectively a central parameter; in this case, hypothesis will be applied to collective habitations inserted in a district and part of a specific urban context: the city of Fribourg. The urban environment has particular features in relation to surrounding rural areas: energy exchanges, hydrology characteristics and limited ecosystems. The relationship between the use of natural resources and urban development is becoming more and more important; the purpose of this thesis is then to define a methodology able to suggest a sustainable use of water through environmental, political and economic issues. A real urban case study with its current water management system defines what has to be analyzed and allows evaluating the limits and the possible enhancements of such system. Thus, in order to have an idea about the potential of sustainable water management solutions, an ambitious analysis of energy related to water uses and disposals is created and is used to show the reasons for change in a real model as the city of Fribourg. A comparison between two extreme scenarios of Fribourg’s selected zones is finally developed, discussed and implied in the conclusions through specific actions and facts. The results show that a high potential of improvements exist. Using them to elaborate new strategies in collaboration with the several stakeholders contacted may contribute to achieve many of today’s objectives for a sustainable urban water management. The best scenario, chosen with a new concept of eco-label, summarizes and concludes the analysis.

2015

Towards sufficiency in housing: Agent-based model and transition scenarios

Margarita Agriantoni

Research problem: Housing is responsible for a considerable part of global resource consumption. In Switzerland, it accounts for almost one third of the country's CO2 emissions and half of the total energy demand. Thus, housing plays an important role in the transition to sustainable development. Housing has been thoroughly studied from a disciplinary perspective, e.g., economics, social sciences, psychology, engineering. However, little attention has been paid to housing as a system of interrelated actors, e.g., developers, owners, tenants and state, whose actions might be described by different disciplines. Aim: The aim of this thesis is to investigate how a change in the construction practices of property owners in combination to a more space-efficient allocation of dwellings to households and a behavioural change of tenants can achieve a substantial reduction in the environmental impact of housing. This dissertation focuses on the interrelations of housing actors, concentrating mainly on the property owners and explores which measures and to what extent can lead to a reduction of space consumption of housing.Methods: Housing is characterised by a high level of complexity, therefore a transdisciplinary approach is adopted. Firstly, the Swiss housing market and its unique attributes are studied. However, in this thesis, we study a subset of the Swiss rental housing market; it comprises two housing cooperatives: ABZ in Zurich and SCHL in Lausanne as well as the insurer and asset manager Swiss Mobiliar. Their housing stocks, of approximately 10,000 dwellings, are examined in depth and are used as a case study. Extensive data gathering allowed to create an exhaustive inventory of the building stock of the three property owners. The data on tenants was limited, thus, we conducted a tenant survey. Furthermore, a series of workshops with both tenants and property owners were organised to study their decision-making processes. A bottom-up agent-based model (ABM) is built, which portrays the case study housing system. The main actors of the rental housing market (property owners and households) are represented in the model by agents; the owner agents make decisions about their building stock and tenants, while the household agents choose a dwelling based on their needs and housing preferences. The dynamic evolution of both owners and households and the interaction between them is simulated in the model and allows the study of emergent phenomena. The present thesis attempts the assessment of the environmental impact of housing through the lens of housing sufficiency. Space consumption, in terms of dwelling surface and floor area per capita, is considered as the largest determinant of resource consumption.Results: The simulation results show that measures taken to decrease the environmental impact of housing and space consumption are inadequate if owners do not change their construction practices and households do not actively change their housing behaviour. Most measures explored in this thesis, if implemented individually, succeed in reducing the rate of increase in space consumption but fail to reverse the upward trend. A more space-efficient allocation of dwellings to households proves to have a certain effect. However, only when combined with other measures, such as the densification of the existing building stock and a change in construction practices, a significant decrease of environmental impact is observed.

EPFL2022

China’s extended urbanization driven by the 'consumption city' in the context of financialized ecological civilization

Florence Graezer Bideau, Thierry Marcel Theurillat

This article seeks to address current debates on ongoing China’s urban development and makes a theoretical proposal that links financialization and ecological civilization through the perspective of the increasing role of consumption in today’s transition to an upgraded domestic economy. While both financialized land value capture and the role of quality are now fundamental to the construction of the built environment in Chinese cities, we argue that the “consumption city” refers to an economic and urban production process as well as to a societal transformation. First, the economic upgrading has gone along with a greater mobility of people travelling ever longer distances who spend their income or invest in the places they travel to rather than necessarily their places of residence or of work. To attract these consumers, whether they are residents, tourist or property investors, the quality of the living and consumption environments play a dominant role in the complex urban production and in governance, beyond the classic model of development based on the city as a production place. Simultaneously, the rising role of financialization by external households as investors raises the issue of how and to what extent the construction of consumption places has been a way for the state to further enhance the land value capture in (new or not) cities. Second, as the latest government strategy, ecological civilization is part of a social engineering process aiming to shape people’s lifestyles in terms of both their everyday consumption practices and their mindsets. The current transition aims to “civilize” citizens by enlarging the scope of urban consumers beyond the upper and middle classes to people from rural areas who are encouraged to become urban. Ecological civilization promotes a better quality of life for all, together with new outdoor and experiential activities, although this comes with a high ecological footprint.

2022