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The purpose of this paper is to investigate the laminar flow and heat transfer characteristics in a two‐dimensional horizontal channel with two square blocks placed side‐by‐side using a numerical scheme based on a coupling between the lattice Boltzmann method and the finite difference method.

The multiple‐relaxation‐time (MRT) lattice Boltzmann equation model coupled with the finite difference method are used to predict numerically the velocity and the temperature fields.

A complex structure of the fluid flow was observed for various dimensionless block separation distance (G). An unsteady flow was found when the two blocks are placed side by side (G = 0). For G < 1.5, the presence of each block develops the street of Van Karman which generates complex binary vortex street. In the opposite case (G > 1.5), the effect of this parameter (G) on the fluid is reduced, whereas, the distance between the blocks and the nearest walls have a great influence on the fluid flow and the heat transfer. When the obstacles are posed on the walls (G = 3), an important heat exchange between the blocks and the nearest walls is noted.

This study offers more knowledge on natural convection in an obstructed channel. Furthermore, this work shows the effectiveness of the MRT lattice Boltzmann equation model for this kind of geometry.

This paper attempts to deal with the presentation of a numerical investigation of the laminar‐free convective heat transfer in a square enclosure containing a solid cylinder located at an arbitrary position. Effects of the cylinder position on the heat transfer and the flow structures inside the cavity are to be studied and highlighted.

The numerical code is based on the hybrid scheme with the lattice Boltzmann and the alternating‐directional implicit (ADI) splitting scheme. The energy equation is solved by ADI scheme and the flow field velocities have been computed using the lattice Boltzmann method (LBM). The bounce‐back condition combined with quadratic interpolation is used at solid boundaries.

The predicted results show that the cylinder location has a significant effect on the heat transfer. It is observed that: when the inner body does not generate heat, most of the heat transfer takes place if the body is located at the center of the enclosure. When the cylinder generates heat and is displaced from the left towards the right and from the lower part towards the upper part of the cavity, the heat transfer rate decreases on the hot wall and increases on the cold wall.

The fluid flow (air) is assumed to be incompressible, laminar and 2D. The viscous heat dissipation is neglected in the energy equation and all physical proprieties are constant except for the density, whose variation with temperature is allowed for in the buoyancy term.

Natural convection in heated enclosures, housing inner bodies has received significant attention because of its interest and importance in industrial applications. Some applications are solar collectors, fire research, electronic cooling, aeronautics, chemical apparatus, building constructions, nuclear engineering, etc.

The paper contributes to the development of the LBM. In particular, it was found that the inherent numerical instabilities of this LBE are not modified by coupling with temperature. This is a good improvement compared to what is observed in the simulations of thermal systems using the full LBE formulation where the energy conservation is taken into account.

Islamic banks (IBs) must stay Shari’ah compliant to enhance their customer loyalty and obtain a competitive edge. Given the performance of Shari’ah supervisory board (SSB) continues to be a matter of concern especially for IBs across countries that have a different regulatory environment, the purpose of this paper is to examine the effects of SSB characteristics on IBs’ performance in Malaysia being a country that applies the most extreme intervention of regulatory agencies (pro-active model).

A sample of 15 Malaysian IBs is used to test the study hypotheses for the period from 2008 to 2015 using the Generalized Method of Moments estimator.

The results reveal strong support for a significant association between SSB size, doctoral qualification, change in the SSB composition and performance. In addition, the study supports the view that SSB with cross-membership and reputation is very important in improving the performance of IBs.

First, the paper focused only on Malaysia which adopts a pro-active model, and therefore, extending the investigation to include countries that adopt the different models may provide a better view of the best Shari’ah governance (SG) practices for IBs. Second, there is a need for more empirical analysis regarding the optimal SSB size of IBs.

This paper provides empirical evidence for regulators and policy makers in Malaysia, to understand how to enhance the performance of IBs using SG. Furthermore, marketers of Malaysian IBs should focus on SG practices as an important element for attracting Muslim customers, especially as there is a lack in this aspect.

To date, it seems there is no empirical study that has examined to what extent the impact of SSB characteristics on IBs performance can be affected by the degree of agencies intervention, whether extreme or slight. Malaysia has been chosen as the only country that adopts the most extreme model.

The purpose of this paper is to provide a picture of the maintenance management status in a sample of Moroccan industries through highlighting the most impacting factors. A preliminary framework of a maintenance management model is proposed on the basis of the study findings.

A mixed methods research (MMR), including qualitative and quantitative independent studies, was conducted in a sample of Moroccan industries. The process of collecting data involved submission of questionnaires to industrial managers and on-site visits. Analyzing case studies and correlations between maintenance factors were used to define the status of maintenance management. The preliminary framework of a maintenance management model was presented through a basic graph.

The surveyed companies have three levels of maintenance management: inner, medium and good. The most impacting maintenance factors include the top management policy and maintenance department approach. Most of the companies surveyed do not have an overall maintenance model, as most of decisions are based on random factors rather than the data analysis approach. The preliminary framework of maintenance management model involves the main factors with recommendations to improve maintenance management performance.

The sample in this study is limited to seven companies in the qualitative study and thirty-one companies in the quantitative study. The informants are the industrial managers of those companies. In order to apply this maintenance model in industry, an advanced version of this model is to be developed through providing key performance indicators (KPI) and an implementation process for each factor, including other participants in the companies from top management and operational levels.

The study may contribute to assess maintenance management and to develop a framework of maintenance management models in industries, especially when no previous basic study was conducted in a specific context.

The original contribution of this paper is using MMR to develop a preliminary framework of a maintenance management model. This methodology aims to narrow the gap between academic studies and maintenance management in industries.

There is much debate in the literature about how the performance of Islamic banks (IBs) should be measured. Basically, IBs’ business models are different from that of conventional banks; thus, the performance of IBs should be measured by using a Sharīʿah-based approach. This paper considers zakat (Islamic tax) as an alternative indicator to measure the performance of IBs. This paper aims to examine whether zakat ratios can be used as Islamic performance (ISPER) indicators for IBs besides the conventional performance (COPER) indicators.

The investigation covered a sample of 214 yearly observations of 37 IBs located in Indonesia, Malaysia, Bahrain, Saudi Arabia and the United Arab Emirates for the period 2007–2015. This study used a single-factor congeneric model and confirmatory factor analysis, performed using the AMOS 23.0 software.

The findings assert that the discriminant validity of multi-bank performance, as measured by ISPER [zakat on assets (ZOA) and zakat on equity (ZOE)] and COPER indicators (return on assets, return on equity and operational efficiency in terms of assets), is very high. Hence, ISPER and COPER measurements are valid, either together to measure the multi-performance of IBs from both the Islamic and conventional perspectives, or independently as each measurement is valid to measure the Islamic and conventional performance if it is used separately.

This paper does not investigate whether the findings are constant across time. This represents one of the limitations of this study.

It is strongly recommended that IBs calculate and disclose zakat ratios, particularly ZOA and ZOE, in their annual reports. Researchers and academicians should use these ratios for measuring the ISPER of IBs, either along with COPER or separately.

Empirical evidence is provided in this paper on the development and validity of zakat ratios as ISPER indicators in the Islamic banking industry. Zakat ratios are suitable indicators that can measure IBs’ performance and achieve the goals of IBs as well as those of Islamic economics. Technically, zakat has a dynamic ability to reflect the profitability of IBs. The more the IBs generate profit, the more they pay zakat. Furthermore, the greater the total assets of IBs, the higher the amount of zakat that they should pay. Thus, zakat ratios can be used as profitability measurements as in the case of tax ratios.

This paper aims to present the development of a holistic campus facility management (CFM) performance assessment framework that incorporates a fuzzy logic approach and integrates a comprehensive set of key factors for successful management of campus facilities. The devised framework aims to cater to the needs of campus facilities management firms and departments for the purpose of gauging and assessing their performance across different management domains. Through this approach, facility management organizations can detect potential areas of enhancement and adopt preemptive steps to evade issues, foster progress and ensure success.

After a comprehensive analysis of the literature, conducting in-depth interviews with industry experts and employing the Delphi technique in two rounds, a total of 45 indicators critical to CFM success were identified and subsequently sorted into seven distinct groups. Through an online questionnaire, 402 subject-matter experts proficiently assessed the significance of the critical success indicators and their groups. A fuzzy logic framework was developed to evaluate and quantify a firm's compliance with the critical success indicators and groups of indicators. The framework was subsequently weighted using computations of the relative importance index (RII) based on the responses received from the questionnaire participants. The initial section of the framework involved a comprehensive analysis of the firm's performance vis-à-vis the indicators, while the latter part sought to evaluate the impact of the indicators groups on the overall firm's performance.

The utilization of fuzzy logic has uncovered the significant effects each effective CFM key indicator on indicators groups, as well as the distinct effects of each CFM indicators group on the overall performance of CFM. The results reveal that financial management, communications management, sustainability and environment management and workforce management are the most impactful indicators groups on the CFM performance. This suggests that it is imperative for management to allocate increased attention to these specific areas.

This study contributes to the advancement of current knowledge by revealing vital indicators of effective CFM and utilizing them to construct a thorough fuzzy logic framework that can assist in evaluating the effectiveness of CFM firms worldwide. This has the potential to provide crucial assistance to facility management organizations, facility managers and policymakers in their quest for informed decision-making.

This paper aims to examine the effect of dual board governance structure, i.e. Shari’ah supervisory board (SSB) and board of directors (BoD), on the performance of Islamic banks (IBs) in Southeast Asia region versus banks in the Gulf Cooperation Council (GCC) region.

This study uses a sample of 45 IBs over seven countries covering the period of 2007-2015 based on the GMM estimator – First Difference (2-step).

The findings reveal that SSB and BoD for IBs in both regions are segmented in terms of ROA (negative interaction) and integrated in terms of Zakat ratio (Zakat on equity [ZOE]) (positive interaction) only for Southeast Asia region. Furthermore, SSBs positively affect multi-bank performance in Southeast Asia while its effect is absent for GCC. This suggests that Shari’ah governance practices for IBs in Southeast Asia are stronger compared to GCC IBs. Finally, BoD has a significant association with low ZOE for IBs in both the regions.

The implications of this research is that the unique agency theory depicted in this study can be inferred when analyzing how dual board structure affects IBs' performance.

For regulators in both regions, SSBs must be given real power to monitor BoD. They should also balance the number of SSB scholars with experience in Shari’ah, as well as in law, accounting and finance. It is also important that such a balance of scholars with PhD in these areas be required for Southeast Asia IBs. For the GCC’s regulators, CG practices need to be improved by giving due importance to SSB characteristics and BoD structure.

Though the effects of dual board structure on IBs' performance has been previously examined in the literature, only SSB size has been used as a single proxy of SSB governance. Furthermore, no empirical evidence is recorded to date on this issue in Southeast Asia and the GCC regions. One of the innovations of this paper is the use of multi-bank performance measures in the IBs performance and corporate governance.

This paper aims to systematically review the existing studies on the relationship of Sharī'ah governance (SG), as represented by the Sharī'ah supervisory board (SSB), with firm performance of Islamic banks (IBs), to suggest opportunities for future research in this field.

By adopting a systematic literature review, 21 empirical and theoretical papers published in Scopus concerning the relationship between SSB and performance of IBs were selected for review and analysis.

In light of the existing research studies' limitations, this paper suggests that the effect of SSB on IBs' performance still requires more empirical analyses using alternative analytical methods, alternative measures, and different periods (during crisis and non-crisis). Besides that, these studies should take into account the differences across jurisdictions in their SG models, the degree of agencies' intervention in SG practices, the control over cross-memberships of scholars, and the differences across IBs in the position of SSB in the organization structure.

The analysis undertaken in this paper would address the literature gaps on the effect of SSB on IBs' performance as this study serves as a guide for the researchers, academicians, and interested researchers from Islamic international autonomous non-for-profit organizations, e.g. AAOIFI and IFSB in research related to this important area. Importantly, the findings of this study would support regulators and related authorities across jurisdictions with suggestions on improving the current SG practices.

This paper presents a critical review of the existing research on SSB and IB performance and suggests new variables, measurements, analytical methods, and new issues for researchers in this area. Thus, it identifies the literature gap that still needs further empirical investigation and a suitable way to close it.

Contract incompleteness with deficiency, inconsistency, defectiveness, and ambiguity in contract clauses, which can cause misunderstandings and misinterpretations, may result with disputes in projects. This study aims to investigate contract incompleteness factors with a hybrid fuzzy multi-criteria decision approach.

Contract incompleteness factors were ranked by fuzzy VIKOR (Visekriterijumska Optimizacija I Kompromisno Resenje) method, and the most significant factors were subjected to fuzzy decision-making trial and evaluation laboratory (DEMATEL) to examine their causal relationships. The study is not limited to ranking the identified factors solely, since their cause-effect interactions are also essential for proper risk management in construction projects.

Hybrid use of multi-criteria analysis reveals that ambiguity in enforceability including excessive demands and significant amendments in the scope of works are the top two causal contract incompleteness factors, while lack of implementation details and focus of focal point, and insufficient supporting and technical documents are the most affected ones.

Contractual causes of disputes due to contract incompleteness factors other than requirements of the contracts have been rarely investigated in the literature. The research is one of the first studies in the literature investigating the causal relationship among factors in construction contracts, which might lead to project disputes. Findings are expected to improve contract drafting, eventually contributing to effective risk management in construction projects.

The purpose of this strengths or weaknesses, and its external opportunities or threats (SWOT) analysis study on Halal logistics industry in Malaysia is to identify SWOT in the Halal logistics environment and to uncover strategies to leverage on the strengths and opportunities and rectifying the weaknesses as well as overcoming the threats.

This study comprises two methods: literature review and interviews. Extensive literature reviews were obtained from leading databases and the articles recorded matches or related with the keywords. In addition, the respondents from the interviews consist of middle- and top-level managers with reputable knowledge, expertise and experience in the Logistics and Halal industry. After the literature was reviewed and information was transcribed from the interviews, reduction techniques were used to group and summarize the variables into the four SWOT categories.

The SWOT categories, consisting of SWOT, are generated from the literature reviews and supported by the respondents’ views and vice versa. Examples of SWOT analyses done are as follows: strength (strong government support), weakness (inconsistent Halal definition), opportunity (Muslims’ population growth) and threat (no uniformity on Halal standards).

The SWOT analysis done for this study only demonstrates the internal and external environments and not the assumption that they are certain to be correct, as they contain every imaginable matter in relation to Halal logistics. Plus, the analysis done does not show how to achieve competitive advantage, merely as a guideline and the SWOT analysis done may be outdated as the environments are constantly changing.

The study hopes to contribute in future studies and act as a guide for the Halal logistics players to have better understanding in their business environment.

This study is the first of its kind, to incorporate SWOT and Halal logistics. Hence, this study will add in more value to the existing academic research done on SWOT analysis and broadening the Halal and logistics business understanding, not only in Malaysia but globally as well.