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1 – 10 of over 6000Fernanda Acre and Annemie Wyckmans
Non-technical dimensions such as spatial quality are just as relevant for energy efficiency as technical and economic dimensions in the renovation of dwellings. However, the…
Abstract
Purpose
Non-technical dimensions such as spatial quality are just as relevant for energy efficiency as technical and economic dimensions in the renovation of dwellings. However, the significance of non-technical dimensions is often neglected in the energy renovation of dwellings. The purpose of this paper is to demonstrate how the renovation of dwellings for energy efficiency influences spatial quality in the MS-1 building in the neighbourhood of Arlequin, Grenoble, France. The Arlequin case study is part of the ZenN project, nearly zero energy neighbourhoods, funded by the European 7th Framework Programme (Grant Agreement No. 314363).
Design/methodology/approach
The impact of the renovation on spatial quality is analysed by crossing technical measures, applied in the energy renovation of dwellings with the definition of spatial quality proposed by Acre and Wyckmans (2014). The spatial quality definition results from a literature review on quality of design and urban life, wherein works of Weber (1995) and Gehl (2010, 2011) are related to the residential use in the scales of the building and block. The impact of renovation on spatial quality is further evaluated by using the spatial quality assessment developed by Acre and Wyckmans (2015). The impact on spatial quality is observed by considering all the renovation measures, instead of only considering the measures primarily related to energy performance. This emphasises the need for a cross-disciplinary approach between technical and non-technical dimensions in the energy renovation of dwellings.
Findings
The results display both negative and positive impacts of the energy renovation on spatial quality in the dwellings and emphasise the potential of non-technical dimensions in promoting renovation. The impact on spatial quality is primarily negative when only measures adopted in order to improve energy efficiency are considered in the evaluation.
Originality/value
This paper consists of a novel crossing of technical and non-technical dimensions in energy renovation of dwellings. The work aligns with the current European trend of nurturing energy-deep renovation to reach Europe’s 2050 energy-efficiency targets (Buildings Performance Institute Europe (BPIE) 2011).
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Rudolf Espada, Armando Apan and Kevin McDougall
The purpose of this paper was to develop an integrated framework for assessing the flood risk and climate adaptation capacity of an urban area and its critical infrastructures to…
Abstract
Purpose
The purpose of this paper was to develop an integrated framework for assessing the flood risk and climate adaptation capacity of an urban area and its critical infrastructures to help address flood risk management issues and identify climate adaptation strategies.
Design/methodology/approach
Using the January 2011 flood in the core suburbs of Brisbane City, Queensland, Australia, various spatial analytical tools (i.e. digital elevation modeling and urban morphological characterization with 3D analysis, spatial analysis with fuzzy logic, proximity analysis, line statistics, quadrat analysis, collect events analysis, spatial autocorrelation techniques with global Moran’s I and local Moran’s I, inverse distance weight method, and hot spot analysis) were implemented to transform and standardize hazard, vulnerability, and exposure indicating variables. The issue on the sufficiency of indicating variables was addressed using the topological cluster analysis of a two-dimension self-organizing neural network (SONN) structured with 100 neurons and trained by 200 epochs. Furthermore, the suitability of flood risk modeling was addressed by aggregating the indicating variables with weighted overlay and modified fuzzy gamma overlay operations using the Bayesian joint conditional probability weights. Variable weights were assigned to address the limitations of normative (equal weights) and deductive (expert judgment) approaches. Applying geographic information system (GIS) and appropriate equations, the flood risk and climate adaptation capacity indices of the study area were calculated and corresponding maps were generated.
Findings
The analyses showed that on the average, 36 (approximately 813 ha) and 14 per cent (approximately 316 ha) of the study area were exposed to very high flood risk and low adaptation capacity, respectively. In total, 93 per cent of the study area revealed negative adaptation capacity metrics (i.e. minimum of −23 to <0), which implies that the socio-economic resources in the area are not enough to increase climate resilience of the urban community (i.e. Brisbane City) and its critical infrastructures.
Research limitations/implications
While the framework in this study was obtained through a robust approach, the following are the research limitations and recommended for further examination: analyzing and incorporating the impacts of economic growth; population growth; technological advancement; climate and environmental disturbances; and climate change; and applying the framework in assessing the risks to natural environments such as in agricultural areas, forest protection and production areas, biodiversity conservation areas, natural heritage sites, watersheds or river basins, parks and recreation areas, coastal regions, etc.
Practical implications
This study provides a tool for high level analyses and identifies adaptation strategies to enable urban communities and critical infrastructure industries to better prepare and mitigate future flood events. The disaster risk reduction measures and climate adaptation strategies to increase urban community and critical infrastructure resilience were identified in this study. These include mitigation on areas of low flood risk or very high climate adaptation capacity; mitigation to preparedness on areas of moderate flood risk and high climate adaptation capacity; mitigation to response on areas of high flood risk and moderate climate adaptation capacity; and mitigation to recovery on areas of very high flood risk and low climate adaptation capacity. The implications of integrating disaster risk reduction and climate adaptation strategies were further examined.
Originality/value
The newly developed spatially explicit analytical technique, identified in this study as the Flood Risk-Adaptation Capacity Index-Adaptation Strategies (FRACIAS) Linkage/Integrated Model, allows the integration of flood risk and climate adaptation assessments which had been treated separately in the past. By applying the FRACIAS linkage/integrated model in the context of flood risk and climate adaptation capacity assessments, the authors established a framework for enhancing measures and adaptation strategies to increase urban community and critical infrastructure resilience to flood risk and climate-related events.
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Since the fifteenth century when Europeans first established a credible presence in Ghana, colonial values have played a significant role in shaping lifestyles in the country…
Abstract
Since the fifteenth century when Europeans first established a credible presence in Ghana, colonial values have played a significant role in shaping lifestyles in the country. Despite these imported influences, the courtyard house remains the predominant house form in rural and urban areas alike. It is somewhat surprising, therefore, that there is relatively little appreciation within academic and policy-making circles of its versatility. In this paper, the authors focus on the built form of the urban courtyard house and examine its utilitarian qualities from a predominantly architectural viewpoint. Finally, an attempt is made at predicting the medium-term future of this house type.
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Flex−buildings are buildings which are literally designed to change. A flex−building must be able to accept different infills and its users must be able to easily adapt their…
Abstract
Flex−buildings are buildings which are literally designed to change. A flex−building must be able to accept different infills and its users must be able to easily adapt their surroundings.
Flexibility is defined as the capacity of a building to undergo modifications and accept changes of function with limited structural interventions. More than 40% of the activities housed in a flex building can continue to function during modification.
Studies into flex−buildings (commissioned by the Dutch Government) have elicited a number of insights. These are not hard−and−fast conclusions but more in the region of statements and reminders for those involved with flex−buildings.
These studies show that it takes more than civil engineering to successfully realise such buildings. Aspects of use and management are at least as important. Besides, it requires designers who are willing to let go of their design after it is finished. For the result is not a completed ‘architectural’ product but a continually changing object.
Following insights (among others) will be illustrated with built and unbuilt projects in the Netherlands.
• The façade design, for example, figures prominently in designing flexible buildings. It makes special demands on the design’s presentation during the design process, as the building can assume different appearances over time. The double facade is a promising concept that allows for expressive and/or open facades in flexible buildings. It can also help to reduce a building’s energy consumption.
• Also by deliberately incorporating excessive space and construction a building has the necessary leeway to accommodate future developments. A building’s flexibility is enhanced by oversize in structure as well as space.
• A big multi−use building in Rotterdam (H. A. Maaskant / W. van Tijen (1951)) and recent projects of RUIMTELAB are presented as case−studies. These are an inspiration for architects and planners looking for design tools to help achieve an open architecture.
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The options for eliminating CFC‐113 as a solvent for cleaning flux residues from soldered circuit assemblies, or minimising the need to clean, are now clear: diluted CFC solvent…
Abstract
The options for eliminating CFC‐113 as a solvent for cleaning flux residues from soldered circuit assemblies, or minimising the need to clean, are now clear: diluted CFC solvent blends, new HCFC solvents, alcohols, water plus saponifier, water with water‐soluble flux, semi‐aqueous solvents, ‘no‐clean’ fluxes and controlled atmosphere soldering. This paper summarises the advantages and the limitations of each option and presents a methodology (first suggested by Northern Telecom) for ranking the options in a way that is specific to the requirements of the user. Both the cost and the technical feasibility of the implementation of each option are considered to provide a quantitative measure that can form the basis for the decision making ‘which option best fits my requirements and my resources?’
This chapter explores how architecture is used as a signifier in the development and promotion of urban megaprojects (UMPs). It argues that these projects rely on architecture to…
Abstract
This chapter explores how architecture is used as a signifier in the development and promotion of urban megaprojects (UMPs). It argues that these projects rely on architecture to gain visibility. First, UMPs need to be highly visible in order to justify their exceptional status and second, they have to be visibly new and different in order to initiate the desired symbolic transformations with which they are attributed. Drawing on the case studies of HafenCity in Hamburg and Donau City in Vienna the chapter traces the logics of using architecture as a signifier and means of legitimizing the UMP. Data on the planning history of the two case studies, their administrative and institutional frameworks and the overall urban development strategies is combined with a qualitative text and image centered analysis of marketing material, planning documents, and press articles. The discussion shows how visibility is achieved by very different means. The question of how to distinguish the UMP from other projects and of how to make it uniquely identified with the particular city guides the debate in both cases. However, the lines of argument are not predictable or easily comparable from city to city and “global architecture” emerges as a contradictory and relative concept. Based on a succinct review of the related literature the chapter disputes the alleged uniformity of UMPs and argues for a meaning and discourse-oriented approach to the analysis of architecture as vehicle of urban change and political legitimation.
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Arvydas Jadevicius and Simon Huston
The commercial property market is complex, but the literature suggests that simple models can forecast it. To confirm the claim, the purpose of this paper is to assess a set of…
Abstract
Purpose
The commercial property market is complex, but the literature suggests that simple models can forecast it. To confirm the claim, the purpose of this paper is to assess a set of models to forecast UK commercial property market.
Design/methodology/approach
The employs five modelling techniques, including Autoregressive Integrated Moving Average (ARIMA), ARIMA with a vector of an explanatory variable(s) (ARIMAX), Simple Regression (SR), Multiple Regression, and Vector Autoregression (VAR) to model IPD UK All Property Rents Index. The Bank Rate, Construction Orders, Employment, Expenditure, FTSE AS Index, Gross Domestic Product (GDP), and Inflation are all explanatory variables selected for the research.
Findings
The modelling results confirm that increased model complexity does not necessarily yield greater forecasting accuracy. The analysis shows that although the more complex VAR specification is amongst the best fitting models, its accuracy in producing out-of-sample forecasts is poorer than of some less complex specifications. The average Theil’s U-value for VAR model is around 0.65, which is higher than that of less complex SR with Expenditure (0.176) or ARIMAX (3,0,3) with GDP (0.31) as an explanatory variable models.
Practical implications
The paper calls analysts to make forecasts more user-friendly, which are easy to use or understand, and for researchers to pay greater attention to the development and improvement of simpler forecasting techniques or simplification of more complex structures.
Originality/value
The paper addresses the issue of complexity in modelling commercial property market. It advocates for simplicity in modelling and forecasting.
Thillai Rajan Annamalai, Bharat Bansal and Josephine Gemson
The purpose of this paper is to understand the trends and contribution of private equity (PE) investors in real estate development in India because the real estate sector in India…
Abstract
Purpose
The purpose of this paper is to understand the trends and contribution of private equity (PE) investors in real estate development in India because the real estate sector in India had witnessed significant investments from PE firms in recent years.
Design/methodology/approach
The study focused on residential segment of real estate development, as it is the largest among all the segments. Two types of analyses have been done in this paper: first was to compare residential projects with PE investment with those that did not have any PE investment. The results were based on an analysis of 453 residential projects. The second was an analysis of only those projects that had PE investment. This paper studied if there were differences in investment patterns between domestic and foreign PE investors, and dedicated and diversified PE investors.
Findings
Projects with PE investment were larger, as compared to projects that did not have any PE investment. The results of this paper also showed that PE firms preferred to invest with developers who had significant experience in undertaking larger-sized projects. PE investments significantly happened in projects that were located in metro cities. While PE firms as a whole preferred to invest in project mode, domestic investors were more inclined to invest in a project structure as compared to foreign PE firms. Though foreign PE firms invested more amounts per deal on average, there was a negative relationship between foreign PE firms and the extent of their shareholding in the investment.
Practical implications
Encouraging PE investment in real estate projects would contribute toward to increasing the transparency in the sector. Strengthening the domestic PE industry would increase investment flow for real estate projects. PE investors who are able to add value to their investments are able to obtain higher shareholding.
Originality/value
Empirical research on Indian real estate industry is scarce because of the lack of transparency and availability of reliable data. This is one of the initial studies on the Indian real estate sector based on a robust dataset.
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Mojgan Taheri Tafti and Richard Tomlinson
This paper aims to examine the socio-spatial transformation of earthquake-affected neighbourhoods as a setting for understanding post-disaster recovery trajectories of people…
Abstract
Purpose
This paper aims to examine the socio-spatial transformation of earthquake-affected neighbourhoods as a setting for understanding post-disaster recovery trajectories of people, their opportunities for achieving housing recovery and their housing recovery outcomes.
Design/methodology/approach
Adopting a case study approach, this paper focuses on two neighbourhoods located in old urban areas of the city of Bhuj, India. The authors map the transformation of the built environment from before the earthquake, immediately after the earthquake and 10 years after the earthquake. While explaining the morphological changes of the built environment, the authors examine the associated changes in the social fabric of the neighbourhoods by explaining who stayed in their neighbourhoods, who moved out or moved in and who were displaced after the earthquake.
Findings
The authors explore the role of post-disaster public policies, including urban planning, in these changes and in shaping the opportunities of households and individuals for achieving recovery. These policies are compared and contrasted with other urban disaster responses to provide a better understanding of the possibilities of achieving more just recovery outcomes.
Originality/value
This paper contributes to the scant literature on post-disaster planning in cities of developing countries.
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Andrea Berndgen-Kaiser, Tine Köhler, Markus Wiechert, Stefan Netsch, Christine Ruelle and Anne-Francoise Marique
Single-family houses are a common form of housing in Europe. Most were built in the context of the suburbanization after World War II and are now facing challenges arising from…
Abstract
Single-family houses are a common form of housing in Europe. Most were built in the context of the suburbanization after World War II and are now facing challenges arising from generational changes as well as increasing living and energy standards. According to the hypothesis of this paper, in several EU regions, single-family houses may face future challenges arising from oversupply and lack of adaptation to current demand. To examine this, the paper analyses the present situation and discusses the prognosis for the challenges described above regarding the three neighbouring north-western European countries Belgium, Germany, and the Netherlands, based on available data and a review of country-specific characteristics of housing markets as well as national policies. Despite an impending mismatch between demand and supply, planning policies still support the emergence of new single-family houses. The comparison of Belgium, Germany, and the Netherlands shows the growing polarization between shrinking and growing regions and central and peripheral sites apparent at different stages in the three countries. While a high rate of vacancies is already registered for some regions in Germany, in the Netherlands this phenomenon can only be seen near the borders and in villages within the Randstad conurbation. In Belgium also, this phenomenon is not yet widespread, but in some suburban neighbourhoods dating from the 1950's and 1960's more and more single-family houses are becoming more difficult to sell, indicating an emerging mismatch between supply and demand. This article proposes some instruments which enable municipalities to intervene in single family housing neighbourhoods which are largely dominated by private ownership. These instruments are not yet widely established in single-family housing neighbourhoods but that may become important in the future.
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