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This study highlights the demand for low-cost and high accuracy products through the design and development of new 3D printing technologies. Besides, significant progress has been made in this field. A comparative study helps to understand the latest development in materials and future prospect of this technology.

Nevertheless, a large amount of progress still remains to be made. While some of the works have focused on the performances of the materials, the rest have focused on the development of new methods and techniques in additive manufacturing.

This paper critically evaluates the current 3D printing technologies, including the development and optimizations made to the printing methods, as well as the printed objects. Meanwhile, previous developments in this area and contributions to the modern trend in manufacturing technology are summarized briefly.

The paper can be summarized in three sections. Firstly, the existing printing methods along with the frequently used printing materials, as well as the processing parameters, and the factors which influence the quality and mechanical performances of the printed objects are discussed. Secondly, the optimization techniques, such as topology, shape, structure and mechanical property, are described. Thirdly, the latest development and applications of additive manufacturing are depicted, and the scope of future research in the relevant area is put forward.

In recent years, 3D printing technologies have been widely used in the construction industry. 3D printing in construction is very attractive because of its capability of process automation and the possibility of saving labor, waste materials, construction time and hazardous procedures for humans. Significant researches were conducted to identify the performance of the materials, while some researches focused on the development of novel techniques and methods, such as building information modeling. This paper aims to provide a detailed overview of the state-of-the-art of currently used 3D printing technologies in the construction areas and global acceptance in its applications.

The working principle of additive manufacturing in construction engineering (CE) is presented in terms of structural design, materials used and theoretical background of the leading technologies that are used to construct buildings and structures as well as their distinctive features.

The trends of 3D printing processes in CE are very promising, as well as the development of novel materials, will gain further momentum. The findings also indicate that the digital twin (DT) in construction technology would bring the industry a step forward toward achieving the goal of Industry 5.0.

This review highlights the prospects of digital manufacturing and the DT in construction engineering. It also indicates the future research direction of 3D printing in various constriction sectors.

The purpose of this paper is to develop the features as well as model of organisational culture from Islamic point of view.

The study is descriptive, in so far as its goal is to describe a method, and the nature of the paper is conceptual. The study draws on secondary materials through library research.

In this paper both the features as well as model of organisational culture are developed from Islamic perspective. The salient features are trust on Allah, missionary zeal, justice, accountability, mutual respects, mutual trust, absolute sincerity, hard working, cooperation, excellence, brotherly treatment, honesty and truthfulness, morality, consultative decision making, knowledge, good behaviour, sacrifice, neat and cleanliness.

The paper has some implications for Islamic managers and employees who have to deal with ethical dilemmas between traditional and Islamic organisational culture in Muslim countries representing one fourth of the world population. It is also hoped that the study will reinforce managers' Islamic behaviour and make them more aware of the code of conduct based on Quran and Sunna in a modern organisational set up.

The findings of this research can be used as a guide to Islamic organisational culture in Muslim countries. The study could have practical implications falling within the purview of social sciences such as political science, management and organizational studies, education, international law, and human resource management.

While many studies, partially, have focused on traditional organisational culture sparing the demand of Muslim world, in this paper, the authors open a new avenue contributing to the literature on organisational culture from Islamic perspective. The proposed model will be of genuine interest and benefits to Islamic as well as non‐Islamic managers, employees, and academicians.

Visits to locations connected to historical atrocities, tragedy, suffering, or presumably dreadful events are referred to as “dark tourism”. While Bangladesh may not be widely known for dark tourism, several unexplored avenues may be of interest to those who engage in this type of unique and unconventional tourism experience. In addition to creating job opportunities and income generation in Bangladesh, it can achieve educational objectives, communicate with a broad audience, raise awareness of events of the past, and quench people's thirst for information, which can help them to comprehend a society. Though Bangladesh has several somber locations connected to tragic events including World War II, liberation war sites, mass killing sites, shipbreaking yards, Rohingya refugee camps, riots, and the mother language movement, traditional tourism predominates there. If managed responsibly, these varied resources, somber locations, and histories, some of which date back to 1800, could make Bangladesh a dark tourism destination. Although dark tourism in Bangladesh has the potential to contribute to historical awareness, preservation, educational opportunities, and socioeconomic development, it is yet unexplored due to a lack of knowledge, experience, policy, effective marketing, and some controversies. By approaching responsibly, Bangladesh can leverage its history to attract visitors' interests in exploring the darker aspects of the country's past. Hence, this chapter is designed to explore the status and potential significance, prospects, and challenges of dark tourism in Bangladesh. The findings will help policymakers, tourists, and other stakeholders to explore and enjoy enormous benefits from Bangladesh's untapped dark tourism opportunities.

Halal tourism despite its increasing contributions toward the global tourism industry, remains a nascent field of research, in particular, investigations that explore the drivers of halal tourism purchase intention of Muslim tourists are insufficient. To contribute to this end, this study aims to examine the moderating role of perceived behavioral control (PBC) on attitude, subjective norms (SN) and behavioral intention by applying the theory of planned behavior.

The conceptual model is tested by using structural equation modeling based on the data collected from 306 Muslim tourists of Bangladesh.

The results reveal that PBC moderates the relationship between attitude and halal tourism intention. Halal tourism intention is also influenced by attitude and PBC but not by SN.

Findings of the study contributed to halal tourism literature by identifying the role of perceived autonomy and capacity on halal tourism intention and by offering an understanding of the underlying psychological drivers of halal tourism choice.

This would help the marketer to design suitable halal tourism offerings to fulfill the unique needs of this less explored tourism market.

To the best of the authors’ knowledge, this is perhaps the first study in the context of the Bangladesh tourism sector that focuses on customers’ halal tourism intention. The study’s findings are crucial in Islamic marketing and halal tourism.

The purpose of this paper is to present an analytical justification from statistical view point about why Islam has strictly forbidden interest for the humankind.

It is a theoretical paper that looks into analytical views of justification in order to investigate the motivation of prohibiting interest.

The results of the paper suggest that interest has a great negative impact on the society, economy and morality of human beings. Analysis found some solid reasons which proved that interest has been really an evil system for the humankind and society as a whole for all times in the history of civilizations. On the other hand, from the statistical information given in the paper it was found that interest‐free financial institutions have been very successful in terms of their deposit, investment, foreign exchange business, financial stability and popularity as compared to the interest based financial institutions.

The impact of interest‐free financial institutions in development financing and in establishing sustainability of a welfare community remains a potential problem due to our shortage and/or lack of proper knowledge.

It is, therefore, very important to be aware of the exact stance of Islam on interest first. Then more extensive networking and complementary relations are needed among the financial and socio‐economic development goals in accordance with the tenets of the Islamic Shariah.

The paper shows its originality in substance and makes a unique contribution to the literature on systems and ethics.

In spite of intensive research that explained the strategic flexibility-performance and information technology (IT) strategy-performance relationships, there is a little insight regarding how these notions ideally affect business performance. Accordingly, this study attempts to investigate how businesses can translate IT directions and strategic practices into actual increases in business performance. More precisely, the primary purpose of this paper is to explore the influential role of strategic flexibility and IT strategy on business performance considering balanced scorecard (BSC) dimensions in the context of the tourism industry.

An empirical investigation of 331 tourism businesses was performed to explore the relationship between strategic flexibility, IT strategy and business performance. A non-probability convenience sampling was applied to select the sample. Factor analysis, descriptive statistics and cluster analysis were used to analyze the data.

The findings include the clustering of the studied businesses in terms of strategic flexibility and IT strategy. A cluster analysis based on strategic flexibility indicates that businesses can be divided into four main clusters, and based on IT strategy, they can be classified in three main clusters. The results show that businesses with a high level of strategic flexibility and a high level of IT strategic practices have high performance. More importantly, it was known that proactiveness and strategic use of IT have more predictor role on performance.

A review of the strategic management literature reveals a lack of empirical studies that adequately explore the significant roles of strategic flexibility and IT strategy on business performance in the tourism industry. This paper provides actionable insights into these two main determinants that explain why some tourism businesses outperform others. The primary contribution of this study is to address the gap in our understanding of the interconnections between strategic flexibility, IT strategy and business performance through cluster analysis in the tourism industry.

This paper aims to study waqf practice in Pakistan with regard to its utilisation in funding for higher educational institutions (HEIs) and investigates waqf raising, waqf management and waqf income utilisation.

The paper is based on the views of 11 participants who are actively involved in the waqf, its raising, management and income utilisation, and is divided into three subcategories: personnel of higher educational waqf institution, personnel of waqf regulatory bodies and Shari’ah and legal experts as well as archival records, documents and library sources.

In Pakistan, both public and private awqaf are existing, but the role of private awqaf is greater in higher education funding. However, due to lack of legal supervision private awqaf is considered as a part of the not-for-profit sector and legitimately registered as a society, foundation, trust or a private limited company. Waqf in Pakistan is more focusing on internal financial sources and waqf income. In terms of waqf management, they have firm guidelines for investing in real estate, the Islamic financial sector and various halal businesses. Waqf uses the income for developmental and operational expenditure, and supports academic activities for students and staff. Waqfs are also supporting some other HEIs and research agencies. Thus, it can be revealed that a waqf can cater a sufficient amount for funding higher educational institutions.

In Pakistan, both public and private awqaf are equally serving society in different sectors, but the role of private awqaf is much greater in funding higher education. Nevertheless, the government treats private awqaf as a part of not-for-profit sector in the absence of a specific legal framework and registers such organisations as society, foundation, trust or private limited company. The waqf in Pakistan mostly relies on internal financial resources and income from waqf assets. As the waqf managers have over the time evolved firm guidelines for investment in real estate, Islamic financial sector and various other halal businesses, and utilisation of waqf income on developmental and operational expenditures, academic activities of students and educational staff, other HEIs and research agencies, it can be proved that the waqf can potentially generate sufficient amount for funding HEIs.

The study presents the waqf as a social finance institution and the best alternative fiscal instrument for funding works of public good, including higher education, with the help of three selected waqf cases. Hence, the paper’s findings offer some generalisations, both for the ummah at large and Pakistan.

The paper makes several policy recommendations for policymakers, legislators and academicians, especially the government. As an Islamic social finance institution, the waqf can help finance higher education anywhere around the world in view of the fact that most countries grapple with huge fiscal deficits and are hence financially constrained to meet growing needs of HEIs.

The study confirms that the waqf can be an alternative source for funding higher education institutions whether it is managed by the government or is privately controlled.

This paper aims to present the most influential factors on classroom indoor PM_2.5 (Particulate Matter < 2.5 µ), determining the level of PM_2.5 concentration in five pre-schools located in the most densely populated district of the Tehran metropolitan area (district 6) as a case study to consider the children's exposure to air pollutants and introducing a suitable model, for the first time, to predict PM_2.5 concentration changes, inside pre-schools.

Indoor and outdoor classes PM_2.5 concentrations were measured using two DUSTTRAK direct-reading instruments. Additional class status information was also recorded; concurrently, urban PM_2.5 concentrations and meteorological data were obtained from the fixed monitoring stations and Meteorological Organization. Then, the predicted concentrations of the indoor PM_2.5, from introduced multiple linear regression model via SPSS, compared with the nearest urban air pollution monitoring stations data.

The average outdoor PM_2.5 concentration (43 ± 0.32 µg m⁻³) was higher than the mean indoor (32 ± 0. 21 µg m⁻³), and both were significantly (p < 0.001) surpassing the 24-h EPA standard level. The indoor PM_2.5 concentrations had the highest level in the autumn (48.7 µg m⁻³) and significantly correlated with the outdoor PM_2.5 (r = 0.94, p < 0.001), the number of pupils, ambient temperature, wind speed, wind direction and open area of the doors and windows (p < 0.001). These parameters, as the main determinants, have led to present a 7-variable regression model, with R² = 0.705, which can predict PM_2.5 concentrations in the pre-school classes with more than 80% accuracy. It can be presumed that the penetration of outdoor PM_2.5 was the main source of indoor PM_2.5 concentrations.

This study faced several limitations, such as accessibility to classrooms, and limitations in technicians' numbers, leading to researchers monitoring indoor and outdoor PM concentrations in schools once a week. Additionally, regarding logistical limitations to using monitoring instruments in pre-schools simultaneously, correction factors by running the instruments were applied to obtain comparable measurements.

The author hereby declares that this submission is his own work and to the best of its knowledge it contains no materials previously published or written by another person.