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A novel low profile frequency selective surface (FSS) with a band-stop response at 10 GHz is demonstrated. The purpose of this designed FSS structure is to reject the X-band (8-12 GHz) for the application of shielding. The proposed FSS structure having the unit cell dimension of 8 × 8 mm², the miniaturization of the FSS unit cell in terms of λ₀ is 0.266 λ₀ × 0.266 λ₀, where λ₀ is free space wavelength. The designed FSS provides 4 GHz bandwidth with insertion loss of 15 dB. The transverse electric (TE) and transverse magnetic (TM) modes of the proposed design are same because of polarization independent characteristics and hold the angularly stable frequency response for both TE and TM mode polarization. Both the simulation and measurement results are in good agreement to each other.

The proposed FSS design contains square-shaped PEC material, which is placed on the substrate and the shape of the circle and rectangle is etched over the PEC material. The PEC material of the patch dimension is 0.0175 mm. The substrate used for the proposed design is FR4 lossy with the thickness of 0.8 mm and permittivity εr = 4.3 having a loss tangent of 0.02.

To find a new design and miniaturized FSS structure is discussed.

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The insurance sector provides insurance protection for complex project deals in Ghana. The study assesses the service quality of insurance of complex project deals in the construction industry of developing countries, specifically Ghana. The objectives are to identify the insurance typologies in complex project deals in the construction industry, to assess the level of construction insurance quality, and to assess the challenges faced in complex project insurance.

A comprehensive literature review was conducted to analyze the previously related works on insurance in the construction industry. The study then adopted quantitative research strategy where a structured questionnaire survey was used to collect information from construction industry professionals. The data analysis was organized in accordance with the specific objectives of the study with the aid of mean score analysis and independent sample t-test. The study again measured the reliability of the adopted scale using Cronbach's alpha, which indicated that all the items reliably measured what they were intended to measure, and thereby, statistical tools can be applied to give in-depth meanings.

The insurance typologies for complex projects were discovered by the study, as well as the available service qualities of insurance. The study again made it clear that the major challenges capable of affecting complex construction project are low quality of insurance companies' services and the gap in statutory and legal systems.

The major constraint in this study was the issue of taking only Ghana as a developing country to generalize the result. This is then to provide lessons for other developing countries.

The findings from this study will be useful to construction firms, insurance firms, and regulatory bodies by identifying the effectiveness of insurance as a risk mitigation measure in construction. The study will help the insurance firms to better position themselves to meet the demands of the construction industry. As the findings of this study are Ghana-specific, it is also to provide lessons for other developing countries.

This study delves deep into the complex construction project insurance service quality in developing countries, specifically Ghana.

This research aims to investigate the factors that can influence Bumiputera contractors’ acceptance of the Contractor’s All Risks (CAR) takāful (Islamic insurance) product using the theory of reasoned action (TRA).

Using the method of quantitative surveys, 414 questionnaires were collected from targeted Bumiputera contractors in Malaysia (grade G1 to grade G7), except in Sabah and Sarawak, that are registered with the Construction Industry Development Board (CIDB) and are also members of Persatuan Kontraktor Melayu Malaysia (PKMM). The data was analysed using the partial least squares structural equation modeling (PLS-SEM) technique.

The findings from the PLS-SEM analysis show that attitude, subjective norm, religiosity and awareness have a positive relationship with Bumiputera contractors’ acceptance of the CAR takāful product. Religiosity appeared to be the most significant factor influencing Bumiputera contractors’ acceptance of the CAR takāful product.

The respondents in this study only comprised Bumiputera contractors in Peninsular Malaysia, excluding those from Sabah and Sarawak. Therefore, it is not possible to generalise the findings to a broader population.

Takāful operators and their sales and marketing departments need to act proactively in promoting the benefits of investing in CAR takāful that follows Sharīʾah (Islamic law) rules and principles. They should create mechanisms to market CAR takāful better, thus accelerating its acceptance rate among contractors.

The paper uses the proposed extended TRA model, which includes the variables of religiosity and awareness in the TRA model. These variables were successfully integrated in the model, and the findings show that they have significantly contributed to the acceptance of the CAR takāful product among Bumiputera contractors.

This study aims to develop a perception scale of gender role in disaster management and examine related factors.

A total of 1,167 individuals were reached in the main trial. Exploratory and confirmatory factor analyses were applied to test the validity of the final scale form, respectively.

The scale was developed as unidimensional with two positive items and 17 negative items. The mean scores of the participants were in the positive perception group. The 19-item model is a reliable and valid instrument for measuring the perception of gender role specific to disaster management.

Determining the perceptions of the people will guide the policies related to gender equity and equality and activities to be carried out in the disaster management field. This tool can be used to raise awareness related to gender perceptions in the disaster preparedness activities.

The “Perception Scale of Gender Role in Disaster Management” which is a reliable and robust tool to determine the perception of gender role specific to the disaster management was developed in this study. This tool can contribute to address the needs and capacities and provide influencive strategy development through gender analysis.

The purpose of this study is to investigate the influence of light intensity and sources of carbon and nitrogen on the cultivation of Spirulina maxima.

Cultures were carried out in a modified Zarrouk medium using urea, sodium acetate and glycerol. A Taguchi experimental design was used to evaluate the effect on the production of biocompounds: productivities in biomass, carbohydrates, phycocyanin and biochar were analyzed.

Statistical data analysis revealed that light intensity and sodium acetate concentration were the most important factors, being significant in three of the four response variables studied. The highest productivities in biomass (46.94 mg.L⁻¹.d⁻¹), carbohydrates (6.11 mg.L⁻¹.d⁻¹), phycocyanin (3.62 mg.L⁻¹.d⁻¹) and biochar (22, 48 mg.L⁻¹.d⁻¹) were achieved in experiment 4 of the Taguchi matrix, highlighting as the ideal condition for the production of biomass, carbohydrates and phycocyanin.

Sodium acetate and urea can be considered, respectively, as potential sources of carbon and nitrogen to increase Spirulina maxima productivity. From the results, an optimized cultivation condition for the sustainable production of bioproducts was obtained.

This work focuses on the study of the influence of light intensity and the use of alternative sources of nitrogen and carbon on the growth of Spirulina maxima, as well as on the influence on the productivity of biomass and biocompounds. There are few studies in the literature focused on the phycocyanin production from microalgae, justifying the need to deepen the subject.

Construction and Demolition (C&D) Waste Management (WM) poses significant challenges in Sri Lanka, contributing to environmental degradation and resource depletion. To address these issues, this study explores the application of Circular Economy (CE) strategies in minimising waste generation and optimising resource utilisation in Sri Lankan construction industry. The research focuses on the construction and building renovation and use and operate stages of the building project life cycle, recognising their significance in waste generation and resource consumption.

The research employed a qualitative approach, utilising the Delphi technique through three rounds of expert interviews. Seventeen experts were involved in the first round, followed by fifteen in the second round, and twelve in the final round. The collected data was analysed using manual content analysis methods.

The research findings revealed fifteen C&D WM issues in the construction and building renovation stage in Sri Lanka, along with suitable strategies to overcome each of them. Similarly, eight C&D WM issues were identified for the use and operate stage of the building, and corresponding strategies were provided to address each issue. By adopting CE strategies such as modular design and material reuse, construction projects can optimise the project's timeline, cost, and quality factors. These strategies enable efficient resource allocation, reduce waste generation, and contribute to the overall sustainability of the project. The impact of CE strategies on mitigating these issues within the project management iron triangle was also discussed.

This paper entails delving into how construction, building renovation, and operation stages of a building's life cycle intersect with CE strategies, which profoundly influence operational efficiency and long-term sustainability. By incorporating principles such as energy efficiency, water conservation, and circular product design, the paper illuminates how these strategies facilitate decreased energy usage, enhanced resource management, and diminished waste production throughout the building's lifespan.

Municipalities have the potential to become models of the circular economy (CE). This paper aims to examine the impact of the municipal council’s characteristics on municipal CE disclosure and promotion.

This paper is based on the resource dependence and upper echelons theories. For a sample of the 100 largest cities in Canada, a mixed methodology is used to code and analyze data and test the hypotheses.

Municipal councillors’ education and experience related to the environment or sustainability are both likely to affect CE disclosure, and their sector membership (public or private) moderates the relationship between CE disclosure and councillors’ experience. This experience may be reinforced by membership in the private sector, which has applied CE principles more extensively than the public sector has. Municipal councils with a greater number of councillors from the private sector appear to perform better in matters of transparency and to disclose more CE information on their public websites.

Municipalities could use the findings to foster their transition to CE by implementing a CE-related training plan for their councillors. A CE-dedicated section on their websites could improve transparency and inform and educate residents about CE.

The public sector could learn from the private sector’s best practices regarding CE.

This paper contributes to the literature by providing empirical evidence of the transparency and engagement of municipalities toward CE. The authors extend the resource dependence and upper echelons theories to a new context, that of public organizations.

The rampant toxic gaming environment in most major esports games has become a challenge in maintaining gamers’ loyalty to the game. Guided by the theory of stress and coping, this study aims to investigate how and under what condition esports gamers’ perceived risk of toxicity may affect game brand loyalty through the moderated mediation effects of game brand identification, self-efficacy, and perceived support from game brand.

The moderated mediation model was tested using the conditional process analysis (N = 311). The moderating effects of game brand identification on the mediated processes were tested in the model.

The authors found that self-efficacy and perceived support from game brand were critical mediators between the perceived risk of toxicity and game brand loyalty. However, these mediating effects varied depending on the level of game brand identification.

This study took the step forward by theorizing and empirically examining the relationship between perceived risk of toxicity and consumption outcome by considering both internal and social coping resources and game brand identification, among Generation Z and Millennial gamers in the esports context.

This paper aims to evaluate the construction supply chain (CSC) by examining its relationships with various key areas and its development, identifying gaps and outlining potential future research directions that affect the implementation of CSC standards during the timeframe of the United Nations’ “Decade of Action” plans in the past two decades.

This paper reports on a systematic literature review with bibliometric analysis that investigates publications from around the world on various aspects of CSC. These aspects include research methodology/data collection technique, inquiry mode, country-specific research, focused areas of study, the research aims and publication periods.

The findings of the study reveal that information technology, information sharing, collaboration, performance measurement and CSC configuration have received considerable attention and analysis. However, financial management, supply chain resilience, logistics, vendor managed inventory and rural CSC have been identified as significant areas that require further investigation since limited attention has been given to them in the existing literature.

CSC is a very dominant topic in the current study, but there are some limitations to it. Scopus and Web of Science databases were used to conduct the study. A future study can therefore consider papers related to other databases. As the focus was specifically dedicated to construction material SC only, the papers associated with SCs of labours and equipment have been eradicated.

To the best of the authors’ knowledge, this is the first structured and systematic literature review that identifies the issues related to the CSC during the timeframe of the United Nations’ “Decade of Action” plans and proposes future research directions to enhance the effectiveness and efficiency of CSC.

The Hamilton canal in the western province of Sri Lanka is a man-made canal situated in an area with immense anthropogenic pressures. The purpose of this study is to identify the quality variations of the water in Hamilton canal and human perception about the present status of the water of the canal.

Sampling has been carried out in seven locations in the canal during dry and wet periods for water quality analysis. In situ field-testing and laboratory analysis have been conducted for physicochemical, heavy metal, oil and grease analysis of water. Only Pb, Cd, oil and grease were tested in the canal sediments. The samples were analyzed as per the standard methods of the American Public Health Association (APHA) Manual: 20th edition. A semi-structured questionnaire survey has been carried out to assess the human perception on the water of the canal.

The results revealed that average EC, Turbidity, Total Hardness, TDS, F⁻, Fe²+, Cl⁻, SO₄²⁻ and PO₄³⁻ of the canal water remained above the threshold limits of inland water standards. Concentrations of Pb and Cd were also above the standards in some locations. Oil and grease were in a very high level in water and sediments.

The water of the canal has been affected by nutrient, heavy metal and oil and grease pollution at present. Discharge of domestic, industrial, municipal wastes and sewage are the prominent reasons which have encouraged the deterioration of the quality of water in the canal.