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The purpose of this paper is to discuss the effect of electric reverse stress currents on the performance of photovoltaic solar modules.

The effect of a reverse introduced current as a function of time is studied on the I‐V and C‐V characteristics and parameters which were extracted and analyzed using numerical analysis based on a reliable double exponential model.

The effect of an introduced reverse current for different periods simulated the effect of accumulated extreme reverse currents which may arise in solar cells and modules due to different reasons, causing dramatic changes in the shunt resistance as well as other characteristics, mainly when the time of the current application exceeded a certain limit.

The paper contributes to the research on the damaging effects of reverse currents on the normal operation of the solar cells and modules.

The purpose of this paper is to elucidate the aging effect in dye-sensitized solar cells (DSSCs) sealed with thermoplastic film and to compare it with unsealed DSSCs.

The paper presents the steps of the fabrication of standard DSSC, as well as the DSSC-sealing processes, by using thermoplastic film. Current-voltage characterization was performed to observe the changes in efficiency, fill factor, short circuit current density and open circuit voltage for both unsealed and sealed DSSCs for aging time up to 336 h.

The unsealed DSSC showed significant drop in efficiency from 4.26 to 2.42 per cent within the first 5.5 h of aging time because of the leakage and volatilization of the solvent in the electrolyte. On the other hand, the sealed DSSC exhibited a gradual improvement of efficiency from 4.16 to 4.73 per cent after the first 216 h of aging time. The initial efficiency increment can be ascribed to the improved adsorption of electrolyte into the titanium dioxide film because of the gradual desorption of excess dye from TiO2 with increasing aging time.

This paper demonstrates the importance of the proper sealing process for the long-term operation of DSSC.

The aim of this paper is to find ongoing socioeconomic needs and how they affect the built environment and how they should be financed.

A field survey was undertaken in 2011 in the eastern province of the Kingdom of Saudi Arabia (KSA) to find the citizens’ views about the initial and ongoing financial support of banks and the real estate development fund.

The survey’s results showed that the majority of the respondents did not manage to take up mortgage and own a property. There is also serious lack of financial support for the population’s socioeconomic needs.

The research is carried out in the KSA. The findings, however, can be generalized to other Gulf and Islamic countries as well.

The research would enable the policymakers and financing bodies to consider future socioeconomic needs of low-income citizens and set proper financial resources to meet these needs.

Few research studies have been carried out in the KSA in regard to the relation between the built environment and ongoing socioeconomic needs.

Diabetes mellitus is the most common non-communicable medical condition worldwide, yet little is known about the relationship this disease has to the built environment. The purpose of this paper is to throw some much needed light on the matter by shifting attention away from the epidemiology of the medical condition and towards the anthropology of the unhealthy lifestyles whose habit-persistent practices are associated with the spread of the disease.

The paper reviews the delicate relation between diabetes, unhealthy lifestyles and built environments. It discusses the potential of smart city technologies to promote healthy lifestyles, particularly for diabetic patients.

Smart cities currently being developed in the Kingdom of Saudi Arabia (KSA) do not highlight the health-related benefits of their design and layout and there are currently no plans for the community to address the unhealthy lifestyles of existing neighbourhoods as part of a sustainable urban development programme. So, realising the health-related benefits of smart city neighbourhoods in the KSA shall be challenging.

In attempting to tackle diabetes, cities not only need to be “green and lean” in planning the healthy lifestyles they set out for the development of communities, but also “get smart” about the digital technologies and platform of electronically enhanced services which are required to meet the design and layout challenges smart city neighbourhoods pose.

Gulf and Saudi cities should adopt the IntelCities analogy, so the virtual planning and development of “smart city neighbourhoods”, along with their design and layout of buildings, can tackle the underlying causes.

For almost two years, the economic shocks and financial uncertainty created by the Covid-19 pandemic have affected all sectors. The private sector employees may be the worst hit. This is because of the lockdown across many countries, including the Kingdom of Saudi Arabia (KSA), leading to income irregularities. Studies exploring private-sector employees concerning housing finance for the houses purchased and how the lockdown has affected their sources of income for repayment plans are scarce. Therefore, this study aims to investigate the possible early negative impacts of Covid-19 on private sector employees’ housing finance homeownership in KSA.

A phenomenology type of qualitative research was used. Data were sourced from three cities (Riyadh, Al-Qassim and Medina) and three mortgage banks across KSA. Virtual interviews via Zoom and WhatsApp video calls were conducted with engaged participants (bankers, government agencies and private sector employees). Thematic analysis was adopted, and the analysed data was presented in themes.

Findings show that the partial and full lockdown resulted in income irregularities in many private businesses. Also, findings identified downsizing, leading to large-scale unemployment, half-monthly income for employees, loss of profit, human resources wastage, etc. Findings reveal that because of the economic shock, many homeowners have not been able to meet up with their monthly mortgage repayment obligation. Also, the absence of financial support in form of socioeconomic needs has not helped the matter.

The paper is limited to the early negative impacts of Covid-19 on private sector employees’ housing finance homeownership in KSA and data collected via Zoom and WhatsApp video calls across the three main cities. The recommendations that will emerge from this study may be adopted by other Gulf and Islamic countries with similar homeownership repayment challenges.

This study would stir key stakeholders, especially the policymakers and mortgage institutions to consider future policy principles that focus on who is at the highest risk for housing-related hardships because of the Covid-19 or future pandemic. The outcome can be used to develop an equitable housing policy framework to foster long-term economic mobility and be validated in the future by scholars.

Similar research in this area is limited, which makes this study one of the pioneering attempts to investigate the early negative impacts of Covid-19 on private sector employees’ housing finance homeownership in KSA. The paper sheds light on the emerged early negative impacts and proffer feasible possible solutions to promote homeownership amongst Saudi citizens.

The purpose of this paper is to report the results of a techno-economic feasibility study on the application of Audio Visual Enterprise Resource Planning (AV-ERP). Due to rapid urbanisation and economic growth in developing countries (DCs) like India, there has been tremendous development in infrastructural projects. To maintain the quality and competitive commercial pricing of the projects, stakeholders are working together from different geographic locations. Due to lack of culture in adopting the technological advancements, the on-site construction activities lack coordination among the stakeholders.

In the present case, it is observed that the site and various stakeholders like consultants are physically monitoring and controlling the ongoing construction activity from different geographic locations. To manage the effective communication and information exchanges, an integrated tool for surveillance and AV-ERP is proposed in the present paper. These equipment and technologies play a very vital role in the construction industry, which, in turn, significantly affects the progress, cost and time of the project. The techno-economic feasibility of proposed AV-ERP system was evaluated for the ongoing township project over the study area.

For the considered case study, 75 per cent cost of the project overhead incurred for site monitoring can be saved by implementing the proposed technology of AV-ERP system.

The proposed AV-ERP system is a techno-economically viable solution for the effective project management.

In the DCs like India, to develop the culture for adopting the technological advancements (AV-ERP system) for monitoring the on-site construction activities, the presented case becomes an innovative solution for upcoming medium as well as large-scale construction projects.

The purpose of this research is to identify the most impactful delay risks in Australian construction projects, including the associations amongst those risks as well as the project phases in which they are most likely present. The correlation between project and organisational characteristics with the impact of delay risks was also studied.

A questionnaire survey was used to collect data from 118 delayed construction projects in Australia. Data were analysed to rank the most impactful delay risks, their correlation to project and organisational characteristics and project phases where those risks are likely to emerge. Association rule learning was used to capture associations between the delay risks.

The top five most impactful delay risks in Australia were changes by the owner, slow decisions by the owner, preparation and approval of design drawings, underestimation of project complexity and unrealistic duration imposed to the project, respectively. There is a set of delay risks that are mutually associated with project complexity. In addition, while delay risks associated with resources most likely arise in the execution phase, stakeholder and process-related risks are more smoothly distributed along all the project phases.

This research for the first time investigated the impact of delay risks, associations amongst them and project phases in which they are likely to happen in the Australian context. Also, this research for the first time sheds light on the project phases for the individual project delay risks which aids the project managers to understand where to focus on during each phase of the project.

The purpose of this paper is to attempt to bridge the gap between sustainable housing and the use of smart technologies to improve the level of sustainability in the housing construction in Saudi Arabia, by discussing the barriers and enablers concerned with applying sustainability to housing construction in Saudi Arabia, which utilises smart technologies.

A Delphi method survey was employed, for which 25 individuals from three key stakeholder groups of the Saudi housing sector participated. They were asked about their degree of agreement (or disagreement) about the various barriers and enablers of applying sustainability to housing construction in Saudi Arabia, which utilises smart technologies. This research paper must be considered as an indicative study of selected experts that do not represent in any way the total population of Saudi Arabia.

Lack of public awareness has been identified as the most significant barrier in implementing sustainable housing development in Saudi Arabia, which utilises smart technologies. Raising awareness of the public to the benefits of sustainable housing and enlightening key project stakeholders in the design of sustainable housing are both essential in order to overcome the barriers discussed in this paper. In addition, it is important to adopt smart sustainable construction methods, exemplified by but not limited to, appropriate water preservation and wastewater treatment systems that are simultaneously smart and sustainable.

This particular research has dealt with only barriers and enablers in the application of sustainability to housing in Saudi Arabia, which utilises smart technologies. For a more complete understanding, there is a need for further analysis of supplementary factors.

A study such as this, which identifies and prioritises barriers and enablers, could prove useful in guiding or encouraging the relevant ministry in Saudi Arabia to develop policies founded in the implementation of sustainability to the housing sector.

This research is a preliminary investigation into the implementation of sustainable housing development as it relates to Saudi Arabia.

The purpose of this paper is to investigate the dark properties as a function of reverse current induced defects. Dark characteristics of solar modules are very essential in the understanding the functioning of these devices.

Reverse currents were applied on the photovoltaic (PV) modules to create defects. At several time intervals, dark characteristics along with surface temperature were measured.

Current-voltage (I-V) and capacitance-voltage (C-V) characteristics furnished valuable data and threshold values for reverse currents. Maximum module surface temperatures were directly related to each of the induced reverse currents and to the amount of leakage current. Microstructural damages, in the form of hot spots and overheating, are linked to reverse current effects. Experimental evidence showed that different levels of reverse currents are a major degrading factor of the performance of solar cells and modules.

These results give a reliable method to predict most of the essential characteristics of a silicon solar cell or a module. Similar test could help predict the amount of degradation or even the failure of PV modules.