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See detailUrban governance adaptation in an old industrial city: Liège (Belgium)
Breuer, Christophe ULg; Halleux, Jean-Marie ULg; Teller, Jacques ULg

in Francese, Dora (Ed.) Napoli Citta Metropolitana (in press)

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See detailModelling Uncertainties in Long-Term Predictions of Urban Growth: A Coupled Cellular Automata and Agent-Based Approach
El Saeid Mustafa, Ahmed Mohamed ULg; Saadi, Ismaïl ULg; Cools, Mario ULg et al

in Ferreira, Joseph; Goodspeed, Robert (Eds.) Proceedings of CUPUM 2015 (2015, July 07)

Modelling the growth of urban settlements is of considerable interest for different applications, amongst which integrated flood management. This study aims at modelling urban growth for a long time ... [more ▼]

Modelling the growth of urban settlements is of considerable interest for different applications, amongst which integrated flood management. This study aims at modelling urban growth for a long time horizon up to 2100 and to integrate the model outcomes with a hydrological model for the same time horizon. Forecasting land-use change over such time frames entails very significant uncertainties. In this regard, the main focus of this paper is attributed to the handling of uncertainty in an urban growth model. To this end, we examine a Monte Carlo Simulation method, which is integrated in the proposed urban growth model. Transition probabilities for each non-urban cell are estimated by a coupled Cellular Automata-Agent-Based ap-proach. The results help to handle uncertainty over long time horizons and to assess the increment in degree of uncertainty at every time-step. [less ▲]

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See detailHousing Quality as Environmental Inequality: The Case of Wallonia, Belgium
Lejeune, Zoé ULg; Xhignesse, Guillaume ULg; Kryvobokov, Marko et al

in Journal of Housing and the Built Environment (2015)

First in the USA and then in many other countries, scholarship on environmental inequality has sought to shed light on the unequal environmental conditions borne by poor people and ethnic minorities, and ... [more ▼]

First in the USA and then in many other countries, scholarship on environmental inequality has sought to shed light on the unequal environmental conditions borne by poor people and ethnic minorities, and to challenge public policies and their unjust impacts on those target groups. Housing quality, especially the indoor characteristics of homes, offers an innovative perspective in this field of research. In previous research on environmental inequality in the Walloon context, housing quality has been proven to be a major determinant of quality of life and environmental well-being. This paper analyses housing quality through a twofold approach: through indoor characteristics on the one hand, and outdoor subjective and objective externalities on the other. It reveals the disparities between the most deprived and the wealthiest segments of the population. The evidence for this study is based on a housing quality survey carried out in 2012 and 2013 on 6,018 households in Wallonia (Belgium). The key findings are that poor people are found to live in housing of lower quality, in densely populated neighbourhoods and those with mixed use, with compensating amenities provided at the local level. Moreover, consistent with environmental inequality scholarship, deprived households are found to bear the burden of environmental degradation outside the home. People live in areas with poorer air quality, but are found to benefit from greater access to green spaces. The results of the survey reveal an interesting point concerning the environmental inequality literature; the interior features of housing are found to differ more widely between deprived and wealthier people than the surrounding environment does. [less ▲]

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See detailUrban Development as a Continuum: A Multinomial Logistic Regression Approach
El Saeid Mustafa, Ahmed Mohamed ULg; Cools, Mario ULg; Saadi, Ismaïl ULg et al

in Gervasi, Osvaldo; Murgante, Beniamino; Misra, Sanjay (Eds.) et al Computational Science and Its Applications – ICCSA 2015, Part III (2015)

Urban development is a complex process influenced by a number of driving forces, including spatial planning, topography and urban economics. Identifying these drivers is crucial for the regulation of ... [more ▼]

Urban development is a complex process influenced by a number of driving forces, including spatial planning, topography and urban economics. Identifying these drivers is crucial for the regulation of urban development and the calibration of predictive models. Existing land-use models generally consider urban development as a binary process, through the identification of built versus non-built areas. This study considers urban development as a continuum, characterized by different level of densities, which can be related to different driving forces. A multinomial logistic regression model was employed to investigate the effects of drivers on different urban densities during the past decade in Wallonia, Belgium. Sixteen drivers were selected from sets of driving forces including accessibility, geophysical features, policies and socioeconomic factors. It appears that urban development in Wallonia is remarkably influenced by land-use policies and accessibility. Most importantly, our results highlight that the impact of different drivers varies along with urban density. [less ▲]

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See detailCharacterizing the morphology of suburban settlements: a method based on a semi-automatic classification of building clusters
de Smet, Fabian; Teller, Jacques ULg

in Landscape Research (2015)

Urban sprawl is transforming our landscapes and rural areas at a spectacular pace. Measuring the strength of the phenomenon and proposing dynamic ways to delineate suburban areas have been the object of ... [more ▼]

Urban sprawl is transforming our landscapes and rural areas at a spectacular pace. Measuring the strength of the phenomenon and proposing dynamic ways to delineate suburban areas have been the object of much debate amongst scientists. The present article takes the view that, beyond measuring and delineating suburban areas, more efforts should be directed to qualifying the morphology of built settlements within these areas. Therefore it proposes a method based on a semi-automatic classification system of building clusters, designed to describe and interpret the phenomenon from a morphological perspective. This method is based on a combination of field surveys with numerical analyses of digital land cadastre maps. The application of this classification system to the suburban area around Liege reveals that, far from developing in a complete indifference of local conditions, contemporary suburban settlements are influenced by landscape structures inherited from the past. [less ▲]

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See detailLanduse change and future flood risk: an integrated and multi-scale approach
Dewals, Benjamin ULg; Bruwier, Martin ULg; Mohamed El Saeid Mustafa, Ahmed ULg et al

in E-proceedings of the 36th IAHR World Congress (2015, June)

The goal of this research is a better understanding of the complex interactions between landuse change and future flood risk. Landuse change is mainly driven by population growth and socio-economic ... [more ▼]

The goal of this research is a better understanding of the complex interactions between landuse change and future flood risk. Landuse change is mainly driven by population growth and socio-economic factors. It affects future flood risk by altering catchment hydrology and vulnerability in the floodplains, as well as through the feedback effect that changes in flood hazard may have on landuse evolution. The research is based on a chain of modelling tools, including: stochastic landuse change modelling, traffic modelling as well as Land-Use and Transport Interactions models, continuous hydrological modelling and efficient hydraulic modelling of floodplains inundation. The coupling of these modelling tools will allow assessing direct and indirect impacts of land use change on future flood risk, while considering the uncertainties related to each of these processes and their combinations at a 2100 time horizon. [less ▲]

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See detailThe stadium of Olympia: a dialogical composition
Kiuri, Miranda; Teller, Jacques ULg

in Montanola, J (Ed.) International Journal Arquitectonics: Architecture, phenomenology & social dialogics (2015)

The article proposes a renewed interpretation of the relation of the antique stadium of Olympia with its built environment. It is argued that the stadium, far from being isolated from the city as commonly ... [more ▼]

The article proposes a renewed interpretation of the relation of the antique stadium of Olympia with its built environment. It is argued that the stadium, far from being isolated from the city as commonly considered, was connected to the Altis through a series of visual relations, adopting principles of dialogical architecture: composition, significant location, functional routes, perceptions, role of architectonic elements and spatial characteristics. This argument is illustrated through computer-generated perspectives of the stadium. [less ▲]

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See detailOlympic stadiums and Cultural heritage: on the nature and status of heritage values in large sport facilities.
Kiuri, Miranda; Teller, Jacques ULg

in International Journal of the History of Sport (2015)

This paper investigates Olympic stadium heritage values and their cultural significance. It outlines the main challenges in stadium conservation through the interplay between bequest and use values. A ... [more ▼]

This paper investigates Olympic stadium heritage values and their cultural significance. It outlines the main challenges in stadium conservation through the interplay between bequest and use values. A value analysis of listed Olympic stadiums reveals that these are characterized by a specific heritage profile, related to the uniqueness and singularity of the buildings, of the landscape and of the sporting event. The history of architecture and sport are clearly interwoven in these places, as Olympic stadiums appear as testimonies of the evolution of sport and its status for past and present societies. Such an interpretation of Olympic stadium heritage could allow a better Olympic and sporting heritage evaluation and conservation, especially if the ensemble of existing Olympic stadiums was considered as a World Heritage network. [less ▲]

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See detailDevelopment of thermal comfort models for various climatic zones of North-East India
Singh, Manoj Kumar ULg; Mahapatra, Sadhan; Teller, Jacques ULg

in Sustainable Cities and Society (2015), 14

Thermal comfort study provides crucial information about thermal performance of naturally ventilated buildings. Humphreys and Auliciems comfort model uses indoor and outdoor temperatures to predict ... [more ▼]

Thermal comfort study provides crucial information about thermal performance of naturally ventilated buildings. Humphreys and Auliciems comfort model uses indoor and outdoor temperatures to predict comfort temperatures. It is found that the comfort temperatures obtained by using these methods do not take into account the occupant behavioral adaptability to a particular climatic zone. This demands development of new set of comfort models based on local environmental parameters, socio-cultural setup and behavioral action. Analysis shows that four major variables like indoor and outdoor temperature, relative humidity and clothing pattern plays an important role in defining comfort and greatly influence the occupant’s perception and acceptance on thermal comfort. In this study, comfort models are developed based on these variables. The computed neutral temperatures based on the models are compared with the comfort temperatures obtained through comfort survey. The models are developed using the measured data of January and July months and validated with the measured data of April and October months. This study also concludes that it is not possible to obtain a generalized thermal comfort model for all climatic zone because adaptation process, expectation and perception of people are region specific and governed by local socio-cultural requirement. [less ▲]

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See detailDe la territorialisation des controverses : métropolisation, déterritorialisation et (re)territorialisation à Beyrouth
Farah, Jihad; Teller, Jacques ULg

in Métropoles (2015), 16

This article deals with modalities of deterritorialisation and reterritorialisation in cities undergoing metropolisation processes. In these cities, territorial evolution is becoming less related to ... [more ▼]

This article deals with modalities of deterritorialisation and reterritorialisation in cities undergoing metropolisation processes. In these cities, territorial evolution is becoming less related to logics of centrality linking the city and its hinterlands. It is more affected by competition logics between different centralities anchored in different local and international actors and place networks, leading to the “deterritorialisation” of the city. This evolution represents a considerable political challenge for urban citizens as well as for institutions in charge of urban regulation. The main answers to this challenge usually aim to bring back coherence through efforts of “reterritorialisation”. This reterritorialisation builds on territorial governance strategies that may deploy on three different scales : metropolitan, regional or local. Through the case of Beirut, this article stresses that, though of different or even opposing nature, these three forms of territorial governance may be simultaneously operating in the same urban context. The article also asserts that focusing on the development of controversies linked to the organization and use of urban space, and mainly to large urban projects, could serve as a framework for understanding the articulation, tension and mutual development of these governances. Controversies push actors to position themselves, build or redefine networks and engage in projects that would transform urban space, resulting in various modalities of reterritorialisation of the city. [less ▲]

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See detailModeling accessibility to schools: the case of Wallonia, Belgium
Maldague, Hubert ULg; Teller, Jacques ULg; Cools, Mario ULg

in Rasouli, Soora; Timmermans, Harry (Eds.) Current Issues in Transportation Research, Proceedings of the BIVEC/GIBET Transport Research Days 2015 (2015)

Several recent studies about school mobility highlighted the significant decline of active modes and public transport's modal shares. Associated with this decline, it can be observed that distances ... [more ▼]

Several recent studies about school mobility highlighted the significant decline of active modes and public transport's modal shares. Associated with this decline, it can be observed that distances between home and schools have been rising the last two decades. To develop appropriate policies alleviating the negative effects of the increased motorization in the school commute, a diagnosis of probable causes is required. To perform this diagnosis, we develop an accessibility-based methodology using data stemming from the Belgian national household travel (BELDAM) survey. Gamma-functions are calibrated to describe the use of different transport modes according to their relative travel times. Data from OpenStreetMap are used to describe the Walloon roads network in terms of the maximum allowed vehicle speed and length for each link. Properties of the network are modified to match with other transport modes. Maps of accessibility to schools are computed for each transport mode by merging the value of access time represented by isochrones and the calibrated gamma-functions. [less ▲]

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See detailVers une généralisation des quartiers durables ? Présentation du référentiel d’aide à la conception et à l’évaluation développé en Wallonie et analyse prospective de douze quartiers.
Marique, Anne-Françoise ULg; Delbar, Caroline; Loiseau, Véronique ULg et al

in Urbia (2015)

Un référentiel a été développé en Wallonie, à la demande du Ministre de l’Environnement, de l’Aménagement du Territoire et de la Mobilité, pour opérationnaliser le concept de « quartier durable » en ... [more ▼]

Un référentiel a été développé en Wallonie, à la demande du Ministre de l’Environnement, de l’Aménagement du Territoire et de la Mobilité, pour opérationnaliser le concept de « quartier durable » en objectivant les critères minimum à respecter pour inscrire un quartier dans une vision transversale de développement durable. Ce référentiel constitue un cadre général qui régira les projets de quartiers durables menés en Wallonie (Belgique). Les 5 thématiques et les 25 critères qui constituent ce référentiel sont présentés. La grille de critères est ensuite appliquée à douze quartiers de façon à identifier les invariants communs aux processus de conception de ces quartiers et les freins à l’intégration des principes transversaux du développement durable dans les opérations de ce type. Si les critères relatifs aux performances énergétiques des bâtiments ont percolé dans un grand nombre de cas, la mixité des logements et leur accessibilité, la mixité sociale et la participation restent peu abordés. Le référentiel est disponible depuis début 2014 pour tous les acteurs de l’architecture et de l’urbanisme. [less ▲]

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See detailMeasuring the Effect of Stochastic Perturbation Component in Cellular Automata Urban Growth Model
El Saeid Mustafa, Ahmed Mohamed ULg; Saadi, Ismaïl ULg; Cools, Mario ULg et al

in Procedia Environmental Sciences (2014), 22(Winter), 156168

Urban environments are complex dynamic systems whose prediction of the future states cannot exclusively rely on deterministic rules. Although several studies on urban growth were carried out using ... [more ▼]

Urban environments are complex dynamic systems whose prediction of the future states cannot exclusively rely on deterministic rules. Although several studies on urban growth were carried out using different modelling approaches, the measurement of uncertainties was commonly neglected in these studies. This paper investigates the effect of uncertainty in urban growth models by introducing a stochastic perturbation method. A cellular automaton is used to simulate predicted urban growth. The effect of stochastic perturbation is addressed by comparing series of urban growth simulations based on different degree of stochastic perturbation randomness with the original urban growth simulation, obtained with the sole cellular automata neighbouring effects. These simulations are evaluated using cell-to-cell location agreement and a number of spatial metrics. The model framework has been applied to the Ourthe river basin in Belgium. The results show that the accuracy of the model is increased by introducing a stochastic perturbation component with a limited degree of randomness, in the cellular automata urban growth model. [less ▲]

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See detailMilieuongelijkheden: een onderzoek naar de woonomstandigheden in Wallonië
Lejeune, Zoé ULg; Xhignesse, Guillaume ULg; Kryvobokov, Marko et al

in Dierckx, Danielle; Coene, Jill; Raeymaeckers, Peter (Eds.) Armoede en Sociale Uitsluiting, Jaarboek 2014 (2014)

This article has two aims. Firstly, to introduce the important environmental inequality scholarship, mostly imported from the USA, in the Belgian context, where few studies have been carried out to date ... [more ▼]

This article has two aims. Firstly, to introduce the important environmental inequality scholarship, mostly imported from the USA, in the Belgian context, where few studies have been carried out to date on this topic. Secondly, to propose an unconventional approach to environmental inequality scholarship by focusing on housing conditions as substantial environmental inequalities. On this latter premise, we based this study on the CEHD housing quality survey carried out in 2012 and 2013 in Wallonia, to test several hypotheses as regards the relationships between housing quality, poverty, and spatial differentiation – discrepancies among population and space. The results confirm most of our research hypotheses, showing important inequalities in terms of housing conditions between wealthy and poor populations, as well as between urban areas, on the one hand, and suburban and rural areas, on the other. Our findings call for new avenues and priorities for housing policies in Wallonia, and for further research on housing quality as environmental inequality: with a focus on a specific target public – single households, and on subjective perception of environmental nuisances in and surrounding home. [less ▲]

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See detailAspects juridiques de la fiscalité du logement en Wallonie
Bahi, Sacha; Bianchet, Bruno ULg; Farah, Jihad ULg et al

E-print/Working paper (2014)

Ce numéro des « Notes de recherche » synthétise un des volets d’une étude dont l’objet est « la fiscalité relative au logement et l’aménagement du territoire ». Or, afin de bien appréhender les tenants et ... [more ▼]

Ce numéro des « Notes de recherche » synthétise un des volets d’une étude dont l’objet est « la fiscalité relative au logement et l’aménagement du territoire ». Or, afin de bien appréhender les tenants et les aboutissants de cette causalité et, surtout, de formuler des recommandations et propositions relatives au système fiscal en regard d’objectifs territoriaux, une analyse approfondie du cadre juridique s’avère indispensable. Cet examen constitue, en soi, un tout cohérent auquel pourra se référer le praticien de la gestion territoriale. La présente réflexion vise ainsi à présenter les divers mécanismes juridiques qui constituent des impôts frappant les biens immobiliers affectés au logement en Wallonie. L’étude s’intéresse principalement au territoire géographique wallon et non pas au seul pouvoir taxateur : « Région wallonne ». La précision est d’importance, a fortiori depuis l’entrée en vigueur de la sixième Réforme de l’État qui élargit considérablement la compétence du législateur wallon en la matière. Sont donc traités dans ce cadre tant les impôts fédéraux que régionaux, sans oublier les diverses « taxes locales » propres à chacune des communes et provinces de Wallonie. Les impôts directs, comme les impôts indirects seront analysés. Partant de ce balayage législatif de lege lata, la réflexion s’efforce de faire ressortir les diverses nuances politiques qui se dégagent des impôts analysés. Le doigt est tantôt mis sur les lacunes légistiques des textes, tantôt sur les critiques jurisprudentielles adressées aux taxes, tantôt encore, sur les potentialités qu’offriraient la redéfinition ou le recalibrage d’un mécanisme existant. L’étude vise, lorsqu’une possibilité lui est laissée, à formuler des propositions de lege feranda afin d’affermir la légalité de certains mécanismes fiscaux et d’améliorer l’utilisation qui est faite de ceux-ci à l’heure actuelle. [less ▲]

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See detailFiscalité et Aménagement du Territoire
Bianchet, Bruno ULg; Xhignesse, Guillaume ULg; Farah, Jihad ULg et al

Report (2014)

Cette recherche consiste en une réflexion sur la fiscalité en tant qu'outil d'aménagement du territoire et en tant que moyen de recontrer les défis du développement territorial, dans le contexte wallon ... [more ▼]

Cette recherche consiste en une réflexion sur la fiscalité en tant qu'outil d'aménagement du territoire et en tant que moyen de recontrer les défis du développement territorial, dans le contexte wallon. Elle s'intègre dans le contexte des débats qui entourent la sixième réforme de l'Etat belge. Elle a pour objectif l'établissement d'un cadre utilisable pour l'évaluation de certains effets territoriaux suite à la mise en oeuvre ou à la modification de politiques fiscales. In fine, elle aboutira à des propositions d'adaptation ou de mise au point de nouvelles mesures en vue de rencontrer les défis territoriaux. Afin d'atteindre ces objectifs, elle se concentre également sur la mise en évidence des liens existants entre le système fiscal en place et certains défis territoriaux. Son objet est restreint au logement et à l'aménagement en lien avec le logement. [less ▲]

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See detailLanduse change and future flood risk: the influence of micro-scale spatial patterns (FloodLand) - 2nd progress report
Dewals, Benjamin ULg; Bruwier, Martin ULg; El Saeid Mustafa, Ahmed Mohamed ULg et al

Report (2014)

The goal of the project FloodLand is to investigate the complex interactions between landuse change and future flood risk. Landuse change is assumed to be mainly driven by population growth and socio ... [more ▼]

The goal of the project FloodLand is to investigate the complex interactions between landuse change and future flood risk. Landuse change is assumed to be mainly driven by population growth and socio-economic factors. It affects future flood risk by altering catchment hydrology as well as vulnerability in the floodplains; but the feedback effect of (the perception of) changes in flood hazard on landuse evolution is also considered. The research is based on a chain of modelling tools, which represent parts of the natural and human systems, including: landuse change modelling, transportation modelling as an onset for the estimation of indirect flood damage, continuous hydrological modelling (forced by precipitation and temperature data disturbed according to climate change scenarios), as well as efficient hydraulic modelling of inundation flow in the floodplains. Besides reproducing a broad spectrum of processes, the modelling approach spans over multiple scales, from the regional or catchment level down to the floodplain and building levels. This distinctive feature is reflected both within the individual models and through their combination involving fine-scale detailed analyses (or data) embedded within coarser models at a broader level. [less ▲]

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See detailAn Econometric Analysis of Homeownership Determinants in Belgium
Xhignesse, Guillaume ULg; Bianchet, Bruno ULg; Cools, Mario ULg et al

in Lecture Notes in Computer Science (2014, July), 8581

In market economies, homeownership is associated with positive ex- ternalities. Increasing the levels of homeownership has been an objective of governments for the last decades. The analysis of the ... [more ▼]

In market economies, homeownership is associated with positive ex- ternalities. Increasing the levels of homeownership has been an objective of governments for the last decades. The analysis of the determinants of tenure sta- tus provides information to this end. This paper proposes an econometric analysis of housing tenure in Belgium. We review the main variables that have been considered in the literature as influencing housing tenure, after what we estimate a logit model. We observe a strong influence of income and age on the probability of homeownership. Couple relationship and the presence of dependent children have a positive influence, but this influence is less significant. Urban location is associated with lower probability of homeownership, compared with other areas. Our observations follow the trends described for other countries in the literature. [less ▲]

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See detailWhich are the determinants of homeownership ? A logit analysis for the case of Belgium
Xhignesse, Guillaume ULg; Bianchet, Bruno ULg; Cools, Mario ULg et al

Conference (2014, July)

In market-oriented economies, high rates of homeowners are traditionally associated with positive economic effects and externalities. For this reason, public authorities have encouraged homeownership for ... [more ▼]

In market-oriented economies, high rates of homeowners are traditionally associated with positive economic effects and externalities. For this reason, public authorities have encouraged homeownership for the last decades through taxation or subsidies policies. In Belgium, owner-occupation has been promoted since the end of the nineteenth century and homeownership policy is considered as a key element of the Welfare state. Furthermore, the effectiveness of these policies is fundamentally based on a clear understanding of what determines homeownership. Therefore, the analysis of tenure determinants can provide inputs for the definition or the renewal of housing, taxation and subsidies policies. Considering this interest, this paper investigates the issue of housing tenure in Belgium. On the basis of previous related research, a model of tenure choice is estimated using a sample of 6,962 households. The observations follow clearly the general trends described for other countries. Higher income and age, couple status and the presence of dependent children have positive influences on homeownership. In addition, locations presenting a high density of population and a high centrality are associated with a lower probability of homeownership compared with other areas. The underlying significations of these variables are discussed in the paper. [less ▲]

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See detailBridging the gap between Do-It-Yourself urban practices and urban systems
Farah, Jihad ULg; Cabrera Quispe, Juan Edson ULg; Teller, Jacques ULg

in Schoonjans, Yves; Scheerlinck, Kris; Pinheiro, Denise (Eds.) et al Creative Adjacencies (2014)

In contemporary fragmented cities, DIY urbanism is seen as a way to insure inclusiveness and cohesion by mobilizing citizens and improving urban space. However, the capacity of DIY to go beyond local ... [more ▼]

In contemporary fragmented cities, DIY urbanism is seen as a way to insure inclusiveness and cohesion by mobilizing citizens and improving urban space. However, the capacity of DIY to go beyond local epiphenomena and contribute to a systemized way of city making is still an open question that is gaining increasing interest in literature and practice. In this article, we differ from answers provided in the literature to this question in that we are interested in the ways DIY practices could contribute to build from the bottom-up large-scale territories. We rely on Lévy-Strauss oppositions of the bricoleur vs. the engineer and the “savage” vs. the scientist to stress that DIY is instrumental and political. This leads us to consider DIY as a process of problem-solving and domos building where the operational and socio-spatial aspects of DIY are intrinsically linked and evolving together. It is by understanding both these aspects that we can understand the possibilities of, and limitations facing, the development of DIY on a larger territorial scale. We build on case studies in Cochabamba, Bolivia and Beirut, Lebanon. We argue that though it is possible to succeed to build on DIY to develop local territories and rely on these experiences to trace larger ones, the operational and political modes would invariably move towards more top-down comprehensive engineer-like approaches. [less ▲]

Detailed reference viewed: 103 (8 ULg)