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This paper aims to present a review of the design and development of the turbidimeter for measuring the turbidity level in water. Monitoring the turbidity level of water is important because it is related to public health.

A precise and reliable turbidimeter can provide vital data that reveals the water condition level. Several turbidimeter units are discussed briefly. Three types of turbidimeter design – single beam, ratio and modulated four beams – are elaborated with some illustrations of the design concept. Various improvements and innovations for upgrading turbidimeter design are also discussed.

This paper elaborated on a new method of estimating the water turbidity level in water samples using an optical tomography system based on the independent component analysis method. The results showed that a tomography-based turbidimeter can measure slight changes in the level of turbidity when the volume of contaminants is changed slightly. The turbidimeter can also provide a profile of the distribution of the turbidity in the water sample.

A turbidimeter based on the optical tomography concept can be a valuable tool in determining the level of pollution in rivers, sea, etc.

This paper aims to analyze the role of waqf in the socio-economic development of the organization of the Islamic Cooperation (OIC) countries. Various projects currently use waqf as an instrument for socio-economic development, as reported in the scholarly literature. This study will investigate this literature to explore trends in waqf studies and the role of this Islamic form of endowment in the socio-economic development of OIC countries.

This systematic literature review focuses on peer-reviewed journals and data obtained from the Mendeley database using specific criteria to analyze the socio-economic developmental role of waqf in OIC countries from 2011‐2020.

The socio-economic developmental role of waqf in OIC countries has been widely studied. In total, 68 academic articles were found that are relevant to themes of poverty alleviation, social welfare, entrepreneurship, education, health services and religious facilities. They reveal that the role of waqf in social welfare was the most discussed topic in the research. In addition, the majority of studies used an interview method to study waqf institutions in nine OIC countries. Furthermore, the number of publications on the theme has increased significantly every year, although the largest proportion occurred in unindexed journals.

This study provides an overview of research trends in the socio-economic developmental role of waqf. Its results can provide practical input for waqf institutions as they encourage its practice in OIC countries, and for policymakers in formulating their management strategies to promote the role of waqf in the social and economic aspects of society.

This paper reviews the current development of the socio-economic role of waqf in OIC countries. It will help researchers improve their understanding of this role. It will also provide waqf managers in OIC countries with adequate information on waqf projects which they can implement to achieve socio-economic development in their countries.

Cash waqf is a powerful financial instrument that deals with the issue of liquidity constraints in waqf institutions. While there are several models of cash waqf operating in different countries, there is increasing demand for innovative cash waqf models, especially within the financial technology context. This paper aims to propose a practical alternative model of funding for waqf institutions using the concepts of crowdfunding and cash waqf.

This study evaluated the literature relevant to cash waqf models that have been implemented in different countries and proposed a new viable alternative model.

Results offer an alternative financing model, named crowdfunding cash waqf model, for waqf institutions to overcome monetary constraints and enable development projects to be completed.

The current study has important implications for both officials and relevant stakeholders. It is sought to bring better consistency between cash waqf donors, solving the liquidity problem faced by waqf institutions, enhancing the transparency of waqf institutions and their use of waqf funds, wealth circulation and financing businesses without interest-based loans (riba). By incorporating a crowdfunding and investment mechanism in the model, this method of collecting funds will assist governments in reducing their expenditure on waqf institutions and other social development programmes.

The proposed model differs from current methods of generating cash waqf, including those are also internet-based. The proposed model is devised to help waqf institutions achieve financial sustainability by including an investment mechanism in the model to sustain the development of waqf projects.

This study aims to analyse the existing literature on the utilisation of financial technology (FinTech) in the Islamic social finance (ISF) sector, focusing on tools, applications and benefits. From this study, it is to provide insights for literature or for practitioners on how FinTech can be used in ISF, such as using blockchain (tools) in waqf (application) that can help to enhance transparency and trust (benefits) with donors. It is important to explore new available tools or applications in ISF markets so that such effort can benefit the industry in promoting its growth.

A systematic literature review (SLR) was carried out using Reporting Standards for Systematic Evidence Syntheses (ROSES) which has been based on quality evaluation criteria, beginning with 41,945 entries in Scopus, 25,386 entries in the Web of Science and 1,590 entries in the Google Scholar databases and ending with 35 articles from data abstraction and analysis, all of which focus on tools, applications and benefits of FinTech in ISF sector.

This review yielded three primary themes and eleven sub-themes addressing FinTech, namely applications (four sub-themes: crowdfunding, blockchain, banking service and peer-to-peer (P2P), tools (three sub-themes: waqf, zakat and sadaqah), as well as benefits (four sub-themes: transparency, innovation, inclusiveness and efficiency).

This study emphasises on innovative application of FinTech used in ISF industry which focuses on applications, tools and benefits of FinTech to the industry. However, the findings indicate that there is plenty of room for future investigation. The current work outlines several methodological issues and concerns as well as provides recommendations for future research. Various challenges associated with FinTech applications include inadequate regulations, complex permit application procedures, misuse of FinTech for terrorist financing, the existence of fraudulent FinTech companies and consumer disputes in the FinTech sector concerning ISF. There are few in-depth studies on the possible use of FinTech models in ISF, compared to studies focusing on upcoming challenges. This study also highlights the methodological limitations in previous research efforts, which can be used to improve future studies in this area. To offer a more comprehensive analysis, additional search keywords and engines that have not been included in this study could be used in future investigations with different methodologies.

For practitioners, the paper has significant managerial consequences. The analysis provides insights into real-life opportunities, limits and solutions for improving performance management by looking at FinTech applications from a larger and more diverse perspective. The practitioners, especially the State Islamic Religious Council, can recognise the benefits of using FinTech technology in ISF (waqf, zakat and sadaqah), namely under their jurisdiction.

This systematic literature assessment identifies critical knowledge gaps that must be addressed such as the applications of FinTech that are still ambiguous, with certain applications not completely embraced in the ISF industry. This study uses SLR technique to categorise literature, identify gaps in current studies and provide recommendations for the research issue (Paul and Criado, 2020), instead of using the other previous methodology such as content analysis or qualitative review. Hence, FinTech is considered an innovative or new approach in ISF industry.

The purpose of this paper is to provide an organizing lens for viewing the distinct contributions to knowledge production from those research communities addressing the impact of competitive strategy on company performance in general, and the influence of cost leadership and differentiation strategy on organizational performance in detail.

The research methodology was based on the PRISMA review, and thematic analysis based on an iterative process of open coding was analyzed and then the sample was analyzed by illustrating the research title, objectives, method, data analysis, sample size, variables and country.

The main factor that influenced the competitive strategy is strategic growth; strategic growth has a significant influence on competitive strategy. Furthermore, competitive strategy will boost firm network, performance measurement and organization behavior. In the same way, the internal goal factor will enhance organizational effectiveness. Also, a differentiation strategy will support management practice factors, strategic positions, product price, product characteristics and company performance.

This study contributes to the literature by identifying a framework of competitive strategy factors, company performance factors, cost leadership strategy factors, differentiation strategy factors and competitive strategy with global market factors. This study provides a complete picture and description of the resulting body knowledge in competitive strategy and organizational performance.