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1 – 6 of 6Most of the native citizens in the UAE live in public or private single-family houses. Given the tremendous cost of developing this type of housing and the inability of providing…
Abstract
Most of the native citizens in the UAE live in public or private single-family houses. Given the tremendous cost of developing this type of housing and the inability of providing single-family houses to cover all the current and future needs for public housing, high-rise residential buildings seem to offer an alternative. But the question is; does this type of housing suit the local communities in the UAE, especially in light of the failure of the previous western experiences?. Through addressing this question, the research proposes an approach towards a community-oriented design for high-rise residential buildings in the UAE.
The research first investigated the reasons behind the community-relevant shortcomings of the traditional high-rise residential developments in the West. Afterwards, it briefly reviewed the status quo of the community-relevant considerations in the design of the recently built high-rise residential buildings in the UAE, where it has been found that little concern has been devoted to the community needs. In an effort to find an answer to this problem, the research examined four recent design experiences as examples for the current universal efforts to design community-responsive high-rise residential developments. Some conceptual approaches were derived from these experiences that are envisaged to help reach an approach for the case of the UAE. Nonetheless, because of the unique social and cultural traits of the UAE native society one cannot rely on these global conceptual approaches alone. Instead, the research proposes an approach that, while benefiting from the relevant global experiences, is chiefly pivoted on the vertical reconfiguration of the idea of the ‘fareej’ as the smallest unit in the residential urban context both traditionally and in the future official urban plans in the UAE.
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Hadia Alhaddad and Khaled Galal Ahmed
While urban farming is advocated as a contributor to urban sustainability and resilience, the “informal” household-practiced urban agriculture activities are taking place within…
Abstract
Purpose
While urban farming is advocated as a contributor to urban sustainability and resilience, the “informal” household-practiced urban agriculture activities are taking place within urban spaces in most Emirati neighbourhoods but unfortunately without investigating their potential as participatory processes that could efficiently help attain urban sustainability and resilience on the neighbourhood level. So, this research is a humble attempt to bridge the gap of the lack of official recognition of informal residents-led processes and their products in a way that help understand them and their impacts and to explore the possibility of developing them further into wider community shared urban agriculture activities.
Design/methodology/approach
The research adopted the case study method and selected a representative neighbourhood to investigate informal residents-led urban agriculture practices. The utilized qualitative–quantitative investigation tools included map analysis, field observation and in-depth interviews with the residents of the selected neighbourhood.
Findings
The results of the research have revealed that the residents managed to successfully pursue informal urban farming processes that have led to significant environmental, social and economic sustainability and resilience outcomes. While these informal urban farming activities are performed individually by each household, the interviewed residents have shown enthusiasm to take part in larger-scale collective community urban farming activities, especially in the deserted public and semi-public spaces in their neighbourhood.
Originality/value
The research outcomes significantly contribute to the growing worldwide discourse about urban agriculture/farming, especially in a country like the UAE where such activities are almost overlooked. Based on its findings, the research concludes by proposing a set of recommended actions to legitimatize these informal urban agriculture processes in the urban development regulations and to build on them to encourage the local communities towards more collective urban farming activities.
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Muhammad Sami Ur Rehman, Muhammad Tariq Shafiq, Fahim Ullah and Khaled Galal Ahmed
The purpose of this study is to investigate the current construction progress monitoring (CPM) process in relation to the contractual obligations, how project management teams…
Abstract
Purpose
The purpose of this study is to investigate the current construction progress monitoring (CPM) process in relation to the contractual obligations, how project management teams carry out this activity in the field and why teams continue to adopt the current method. The study aims to provide a comprehensive understanding of the current monitoring process and its effectiveness, identify any shortcomings and propose recommendations for improvements that can lead to better project outcomes.
Design/methodology/approach
The study conducted semi-structured interviews with 28 construction management practitioners to explore their views on contractual requirements, traditional progress monitoring practices and advanced monitoring methods. Thematic analysis was used to identify existing processes, practices and incentives for advanced monitoring.
Findings
Standard construction contracts mandate current progress monitoring practices, which often rely on manual, document-centric and labor-intensive methods, leading to slow and erroneous progress reporting and project delays. Key barriers to adopting advanced tools include rigid contractual clauses, lack of incentives and the absence of reliable automated tools. A holistic automated approach that covers the entire CPM process, from planning to claim management, is needed as a viable alternative to traditional practices.
Research limitations/implications
The study's findings can inform researchers, stakeholders and decision-makers about the existing monitoring practices and contribute to enhancing project management practices.
Originality/value
The study identified contractually mandated progress monitoring processes, traditional methods of collecting, transferring, analyzing and dispensing progress-related information and potential incentives and points of departure towards technologically advanced methods.
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Ahmed M. Galal, Muhammad Zeemam, Muhammad Imran, Muhammad Abdul Basit, Madeeha Tahir, Saima Akram and Jihad Younis
Nanofluids are used in technology, engineering processes and thermal exchanges. In thermal transfer processing, these are used for the smooth transportation of heat and mass…
Abstract
Purpose
Nanofluids are used in technology, engineering processes and thermal exchanges. In thermal transfer processing, these are used for the smooth transportation of heat and mass through various mechanisms. In the current investigation, we have examined multiple effects like activation energy thermal radiation, magnetic field, external heat source and especially slippery effects on a bioconvective Casson nanofluid flow through a stretching cylinder.
Design/methodology/approach
Several studies used non-Newtonian fluid models to study blood flow in the cardiovascular system. In our research, Lewis numbers for bioconvection and the influence of important parameters, such as Brownian diffusion and thermophoresis effects, are also considered. This system is developed as a partial differential equation for the mathematical treatment. Well-defined similarity transformations convert partial differential equation systems into ordinary differential equations. The resultant system is then numerically solved using the bvp4c built-in function of MATLAB.
Findings
After utilizing the numerical approach to the system of ordinary differential equations (ODEs), the results are generated in the form of graphs and tables. These generated results show a suitable accuracy rate compared to the previous results. The consequence of various parameters under the assumed boundary conditions on the temperature, motile microorganisms, concentration and velocity profiles are discussed in detail. The velocity profile decreases as the Magnetic and Reynolds number increases. The temperature profile exhibits increasing behavior for the Brownian motion and thermal radiation count augmentation. The concentration profile decreased on greater inputs of the Schmidt number and magnetic effect. The density of motile microorganisms decreases for the increased value of the bio-convective Lewis number.
Originality/value
The numerical analysis of the flow problem is addressed using graphical results and tabular data; our reported results are refined and novel based on available literature. This method is useful for addressing such fluidic flow efficiently.
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Fateh Mebarek-Oudina, Ines Chabani, Hanumesh Vaidya and Abdul Aziz I. Ismail
This paper aims to present a numerical study that investigates the flow of MgO-Al2O3/water hybrid nanofluid inside a porous elliptical-shaped cavity, in which we aim to examine…
Abstract
Purpose
This paper aims to present a numerical study that investigates the flow of MgO-Al2O3/water hybrid nanofluid inside a porous elliptical-shaped cavity, in which we aim to examine the performance of this thermal system when exposed to a magnetic field via heat transfer features and entropy generation.
Design/methodology/approach
The configuration consists of the hybrid nanofluid out layered by a cold ellipse while it surrounds a non-square heated obstacle; the thermal structure is under the influence of a horizontal magnetic field. This problem is implemented in COMSOL multiphysics, which solves the related equations described by the “Darcy-Forchheimer-Brinkman” model through the finite element method.
Findings
The results illustrated as streamlines, isotherms and average Nusselt number, along with the entropy production, are given as functions of: the volume fraction, and shape factor to assess the behaviour of the properties of the nanoparticles. Darcy number and porosity to designate the impact of the porous features of the enclosure, and finally the strength of the magnetic induction described as Hartmann number. The outcomes show the increased pattern of the thermal and dynamical behaviour of the hybrid nanofluid when augmenting the concentration, shape factor, porosity and Darcy number; however, it also engenders increased formations of irreversibilities in the system that were revealed to enhance with the permeability and the great properties of the nanofluid. Nevertheless, this thermal enhanced pattern is shown to degrade with strong Hartmann values, which also reduced both thermal and viscous entropies. Therefore, it is advised to minimize the magnetic influence to promote better heat exchange.
Originality/value
The investigation of irreversibilities in nanofluids heat transfer is an important topic of research with practical implications for the design and optimization of heat transfer systems. The study’s findings can help improve the performance and efficiency of these systems, as well as contribute to the development of sustainable energy technologies. The study also offers an intriguing approach that evaluates entropy growth in this unusual configuration with several parameters, which has the potential to transform our understanding of complicated fluid dynamics and thermodynamic processes, and at the end obtain the best thermal configuration possible.
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