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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.

As technology becomes more widely accessible, there is a growing concern about internet gaming disorder (IGD) around the world. The aim of this study is to evaluate the prevalence of IGD and also assess the effects of depression, anxiety, stress and insomnia levels on the IGD of youths in Bangladesh.

A cross-sectional quantitative study design was used to collect data from the youths of different locations in Bangladesh between October 21, 2023 and January 15, 2024. A total of 501 samples were collected using the convenience sampling technique. The following measurement scales were Internet Gaming Disorder Scale short form, depression, anxiety and stress scales and insomnia severity index, which were used to assess scores for IGD, psychological distress and insomnia, respectively.

The study found that the prevalence of IGD was 9.8%. IGD was shown to be significantly associated with depression, anxiety and stress. Aside from that, IGD and insomnia had a significant association, as did a friendly family environment.

The generalizability of the results could be improved by conducting additional studies with a more diverse sample, such as the general population or a different age group.

The study will help the government reduce the prevalence of IGD, improving the mental and physical health of youth.

No research has been conducted on youth and different professions in Bangladesh. There has also been very little research on the prevalence of gaming addiction and mental health.

This paper aims to assess the impact of the training program on fish traders in building awareness about formalin abuse in food items.

Primary data was collected from the fish traders in Bangladesh by using simple random sampling technique. Binary logistic regression was used to assess the opinions of the fish traders about training in building awareness of formalin abuse.

This study showed that the training of the fish traders played a positive role in improving their awareness level of formalin abuse.

Enhancement of both training and educational support could be an effective strategy in preventing formalin abuse in food.

This study helps in assessing the opinions of the fish traders about the effectiveness of the training programs in building awareness of formalin abuse.

The purpose of this study was to assess the repercussions of eucalyptus bark and tea leaf extract as natural dyes and antibacterial agents for jute–cotton union fabric.

The dye was collected from the eucalyptus tree’s bark and tea leaves by the aqueous extraction method. The fabric was dyed with potassium alum mordant, using pre-mordanting, post-mordanting and meta-mordanting methods. Examine the color performance analyzed the K/S, L*, a*, b*; fastness to washing using standard test method ISO 105 C06 A2S, rubbing fastness was performed by Crock meter using AATCC 115. The dyed fabrics were characterized by Fourier transform infrared radiation for the existence of various functional groups. Also, antimicrobial activity testing was done by the agar diffusion method (AATCC method SN 195 920) where Escherichia coli and Staphylococcus aureus were used.

The extracted dye tea leaves meta-mordant dyed samples were determined to have the strongest relative color. Fabrics pre-mordanted and post-mordanted with extracted eucalyptus and extracted tea dye produced the same outcome, which was excellent for wash fastness to staining and very good for wash fastness to fading. For both eucalyptus bark and tea, rubbing fastness on the pre-mordanted fabric produced very positive results. In mordanted colored fabric, significant antibacterial activity was discovered against S. aureus and E. coli.

This study demonstrates that the eucalyptus bark and tea leaves extract encompasses a solid antimicrobial action with amazing coloring execution for jute–cotton union fabric.

A nationwide common malpractice in Zakat distribution has been prevailing in Bangladesh for the past few decades. The paper is a groundbreaking effort to investigate the perceptions of the Zakat payers about the common malpractices and to highlight whether any change in the conventional distribution of Zakat has occurred during the Covid-19 pandemic. The study also aims to extract the common perception of the Zakat payers regarding the validity of the changed practices during the pandemic.

The study adopts the qualitative research approach allowing an in-depth interview technique based on an unstructured questionnaire schedule to obtain information from the Zakat payers, complemented by the key informant interview with the Islamic Scholars. The study obtained data from Zakat payers administering a purposive sampling technique based on two specified criteria. After coding the information on three main themes, content analysis is used to examine the results.

The results reveal that although the Zakat payers dislike the common practices because of some antithetical issues, they still practice the same customs. Moreover, they apportion most of the value of Zakat in purchasing low-quality festive-motive clothes for the recipients. They are ignorant about Islamic law and the validity of such practices. According to scholars, these activities are not a pure system of Zakat provision and unable to alleviate poverty. Amid the Covid-19 pandemic, this practice shifted heavily to buying food items for the poor due to the financial hurdles they confronted during the pandemic. Although no solid argument is deduced from the participants about the exactitude of such distributional change, scholars regard the transformation as beneficial to the afflicted and the impoverished who have been hit by the pandemic, as well as not conflicting with the Zakat legislation.

The study is a novel contribution to addressing the malpractice in Zakat distribution through receiving practical information from the Zakat payers, which will help produce more in-depth research in Islamic finance. Furthermore, this research will help the government and people raise awareness about the authentic practices of Zakat distribution according to the codes of Shari’ah.

This study is a pioneering investigation since a scarcity of scholarly works attempted to identify the impact of Covid-19 on the practice of Zakat distribution and the associated perception regarding its Islamic jurisprudence. To the best of the authors’ knowledge, the investigation of common malpractices of Zakat is still unearthed by no former rigorous studies in the context of Bangladesh. The present study bridges this gap and paves a pragmatic research dimension in the Islamic finance.

This research aimed to find out both direct and mediating relationships between the fear of COVID-19 (FC) and the usage of digital financial services (UDFS) via mediator financial anxiety (FA). It also attempted to ascertain the moderated effect of education of small and medium-sized enterprise (SME) owners (ESO), i.e. business degree holders (BDH) vs nonbusiness degree holders (NBDH), in the relationship between FC and the UDFS.

This research employed a simple random sampling technique. In total, 387 complete responses were collected from Pakistani SMEs. The complete analysis was performed using Statistical Package for the Social Sciences (SPSS) 23, AMOS 24, Process Marco 4.1, and Interaction 1.7.

According to the findings, FC leads to UDFS and FA mediates this relationship. Additionally, the findings show that the ESO between FC and UDFS was moderated. However, conditional analysis shows that BDH-SME owners strengthened the moderated relationship between FC and UDFS compared to NBDH-SME owners, who did not show any relationship.

Policymakers might use the study's findings to promote business education, which has been recognized as essential for making sound financial decisions. Finally, because the study is cross-sectional, the authors are unable to draw definitive generalizations.

The key novelty of this research work lies in the inclusion of FA as a mediator and the education of SME owners as a moderator in understanding the relationship between FC and the UDFS. This study illuminated the positive aspects of the COVID-19 epidemic based on the theory of emotional finance, risk avoidance theory and theories of emotion.