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The purpose of this study is to consider the dynamics of Casson–Walters-B alongside gyrotactic microorganisms through the investigation of antibacterial and antiviral mechanisms using silver nanoparticles (AgNPs). The Casson fluid and Walters-B flow from the penetrable plate to the boundary layer (BL) in this analysis. The antiviral and antibacterial mechanisms of AgNPs were separately examined in this study.

The physical phenomenon of this problem was analyzed with partial differential equations (PDEs). These PDEs were changed into ordinary differential equations (ODEs) to further explain the significance of pertinent control parameters. The set of equations is solved numerically by implementing the spectral relaxation method (SRM). SRM is a numerical technique that uses the basic techniques of Gauss-Seidel. The SRM first decouples and linearizes the coupled nonlinear set of ODEs.

In this finding, it is found that the thermal radiation parameter produces higher temperatures within the BL to cause blockage in viral replications. It is found in this study that the magnetic parameter assisted in disinfection by lowering the antiviral and antibacterial mechanisms within the momentum BL. This is evident from the reduction in the velocity and momentum BL as the Casson and Walters-B parameters increase.

This paper is unique because it examined the antiviral and antibacterial mechanisms by using AgNPs. Prior to the authors’ understanding, no study of this type was conducted in the past. To the best of the authors’ knowledge, no other study in the past has examined the mechanisms of antiviral and antibacterial separately within the BL. Also, the simultaneous flow of Casson (honey) and Walters-B fluids were considered flowing through the vertical porous plate to the BL.

The clothing industry is one of the earmarked industries in many countries following the rising demand and consumption of clothing products among millennials. Malaysia and Thailand are known to be promising markets for this industry in the South East Asia region. The purpose of this study is to investigate the influence of psychological and marketing factors on clothing interest among Generation Y consumers, as well as the interrelationships between self-confidence, product attitude and purchase intention. The impact of nationality was also examined as a moderator on the investigated relationships.

The data was collected among Generation Y consumers using a survey questionnaire, which had successfully gathered a total of 388 usable cases from the capital cities of Malaysia (Kuala Lumpur) and Thailand (Bangkok). These cities were selected for being the largest cities in its country which contain the highest number of shopping malls, offices and Generation Y population. Data analysis was then performed using both the SPSS and AMOS software.

Findings obtained acknowledged the importance of both psychological (i.e. fashion innovativeness, self-concept, fashion consciousness and need for uniqueness) and marketing (i.e. social media marketing and fashion advertisement) factors towards the clothing interest among Generation Y consumers. Consequently, clothing interest would influence their product attitude, self-confidence and purchase intention, with product attitude and self-confidence as the mediators between clothing interest and purchase intention. Multigroup analysis confirmed that there are differences between Generation Y consumers in both Malaysia and Thailand, where Thai consumers hold a stricter emphasis concerning the influence of social media marketing on clothing interest and self-confidence on purchase intention.

This study is one of the very few studies that explored the minimally investigated territory on the consequential importance of clothing interest within the clothing industry, specifically, through extending the literature on the influence of psychological and marketing factors towards the individuals’ clothing interest. Moreover, this study also successfully highlighted the mediation role of product attitude and self-confidence in the relationship between clothing interest and purchase intention.