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The purpose of this paper is to demonstrate the development of an aircraft-type autonomous portable drone suitable for surveillance and disaster management. The drone is capable of flying at a maximum speed of 76 km/h. This portable drone comprises five distinct parts those are easily installable within several minutes and can be fit in a small portable kit. The drone consists of a ballistic recovery system, allowing the drone landing vertically. The integrated high-definition camera sends real-time video stream of desired area to the ground control station. In addition, the drone is capable of carrying ~1.8 kg of payload.

In order to design and develop the portable drone, the authors sub-divided the research activities in six fundamental steps: survey of the current drone technologies, design the system architecture of the drone, simulation and modeling of various modules of the drone, development of various modules of the drone and their performance analysis, integration of various modules of the drone, and real-life performance analysis and finalization.

Experimental results: the cruise speed of the drone was in the range between 45 and 62 km/h. The drone was capable of landing vertically using the ballistic recovery system attached with it. On the contrary, the drone can transmit real-time video to the ground control station and, thus, suitable for surveillance. The audio system of the drone can be used for announcement of emergency messages. The drone can carry 1.8 kg of payload and can be used during disaster management. The drone parts are installed within 10 min and fit in a small carrying box.

The autonomous aircraft-type portable drone has a wide range of applications including surveillance, traffic jam monitoring and disaster management.

The cost of the cost-effective drone is within $700 and creates opportunities for the deployment in the least developed countries.

The autonomous aircraft-type portable drone along with the ballistic recovery system were designed and developed by the authors using their won technology.

Despite city authorities in Bangladesh being concerned about urban sustainability, they often face difficulties in addressing predominant urban challenges threatening urban sustainability, due to limited relevant literature. To reduce this gap, this study aims to address the predominant urban challenges and assess their severity levels in four city corporations of Bangladesh, e.g. Rajshahi, Sylhet, Barishal, and Gazipur.

Using a mixed-method approach, this study rigorously analyzed field-level data obtained from 1,200 residents across selected cities using diverse statistical techniques. The quantitative analysis included descriptive analysis, exploratory factor analysis, and chi-square tests, whereas qualitative insights were derived through thematic analysis.

The study uncovered nine predominant urban challenges under two crucial factors “Feeble Urban Management” and “Illicit Activities” that collectively explain 62.20% variance. “Feeble Urban Management” explains 44.17% variance, whereas “Illicit Activities” accounts for 18.13%. Within these challenges, uncontrolled urban sprawl, inadequate disaster management, congested roads, and shabby drainage and waste management pose significant threats to urban sustainability. Illicit activities, manifested by encroachment on water sources, grabbing roadside, destruction of natural properties, and activities undermining social security, compound the urban sustainability issue. Severity analysis reveals Sylhet (54.5%), Rajshahi (46.4%), and Barishal (31.2%) as highly impacted, whereas Gazipur exhibits moderate severity (66.7%).

The findings of this study reveal intrinsic insights into urban challenges in Bangladesh that will provide valuable guidance to city authorities, equipping them to implement integrated and effective initiatives and programs that overcome these predominant urban challenges, with a specific focus on Rajshahi, Sylhet, and Barishal city corporations.

Singapore has had a dramatic spike in coronavirus infections in early 2020, with thousands of new cases linked to clusters in migrant workers (MWs) dormitories. To control the spread, the Government attempted to isolate the dormitories, test workers and move symptomatic patients into quarantine facilities. But those measures have left thousands of them trapped in their dormitories, living in cramped conditions that make social distancing near impossible. This paper investigates how COVID-19 has impacted the lives of these workers in varied ways and highlights the migrant workers' belief if Singapore’s effort has been enough for them during the COVID-19 pandemic? The focus is mainly on the low-skilled workers from India and Bangladesh, who are prone to be affected in various ways by COVID-19. My collected data show that migrant workers are grateful to the Singapore state for the support extended during COVID-19. I used the concept of subcultures to explain the condition of the workers in the state of Singapore. Because they expect so little social protection from the state, they are genuinely grateful for its support during the pandemic.

The primary objective of this study is to examine how trust and religiosity, in relation to halal products, impact Turkish consumers' intention to purchase such goods. Furthermore, the study aims to identify whether attitudes towards halal products play a mediating role in these effects.

Data were collected from 847 people living in Turkey using an online survey. The authors empirically tested the proposed conceptual model via structural equation modeling.

The study’s results show that trust in halal products has a positive impact on both the intention to buy halal products and the attitude towards them. Moreover, one’s attitude towards halal products affects the intention to purchase them. Additionally, one’s religiosity-belief level influences the intention to purchase halal products, while religiosity-practice level influences the attitude towards halal products. Furthermore, through indirect effect analyses, it was found that trust in halal products and religious practices has an indirect impact on intention through attitude.

These outcomes significantly contribute to understanding the complex interactions between trust in halal products, levels of religiosity, and attitudes in shaping consumers' purchase intentions and approaches towards halal products. These implications offer valuable insights into how consumers' religious beliefs, trust perceptions, and attitudes influence their purchase of halal-certified products. Validating these conclusions on a larger scale and exploring them in different contexts would be beneficial.

The practice dimension of religiosity pertains to performing actions prescribed by the religion, embodying the practical applications of religious teachings. According to the research findings, the belief dimension of religiosity significantly and positively affects the intention to purchase halal products. This finding aligns with several prior studies.

Sharing information on websites, social media platforms, or product packaging can be effective. If businesses genuinely adhere to halal standards and address the genuine needs of consumers who value halal products, they can enhance consumers' interest in such products.

This research was conducted in Turkey, where most people follow the Muslim faith. The main objective of the study was to examine the trust levels of consumers who have strong religious beliefs and are sensitive to consuming halal products. The study looked at trust on three levels: trust in the halal product, trust in the company that produces halal products, and trust in institutions that provide halal certification. The study also looked at the religiosity levels of the consumers using a two-dimensional approach, which included their beliefs and practices.

This study aims to examine the impact of brand ethical behavior, specifically perceived brand ethicality, on corporate brand legitimacy in the context of halal cosmetics, by considering perceived brand integrity as a mediating factor.

The study used a quantitative cross-sectional research design to gather data from 341 fast-moving consumer goods (FMCG) in Tanzania. The data was analyzed by using AMOS 21, using structural equation modeling techniques.

The findings indicated that perceived brand ethicality has a significant influence on corporate brand legitimacy through the mediation of perceived brand integrity.

The study emphasizes the significance of incorporating and clarifying Islamic laws as integral components of marketing strategies aimed at attracting conscientious customers of halal products. It recommends defining Islamic laws as societal values and norms and integrating them into various brand practices to showcase professionalism, ultimately fostering social acceptance and approval. The study presents valuable practical implications for managers and marketers of FMCG, assisting them in formulating policies and strategies that reflect societal values and norms.

This study represents a novel endeavor that explores the interplay between perceived brand ethicality, corporate brand legitimacy and perceived brand integrity in the context of halal products. It extends theoretical understanding by shedding light on the significance of Islamic laws as a foundation for establishing a competitive advantage. By offering and designing ethical practices, businesses can enhance their legitimacy among halal consumers, particularly in the domain of halal cosmetics.