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By examining the impact of the day of the week during the COVID-19 pandemic and the subsequent economic recession, it is possible to provide insights into market behaviour during volatile times that can be furnished to investors and policymakers for informed decisions.

This study investigates the day-of-the-week effect on the Colombo Stock Exchange (CSE), with particular emphasis on the variations in this effect during the COVID-19 pandemic and the subsequent economic crisis.

The study applies the Exponential Generalised Autoregressive Conditional Heteroskedasticity (EGARCH) model, allowing for the evaluation of asymmetric responses to positive and negative shocks. The data span from January 2006 to December 2022 and are segmented into different periods: the entire sample, war and post-war periods, the COVID-19 pandemic and the economic crisis period, each reflecting distinct market conditions.

The study uncovers a significant day-of-the-week effect on the CSE. Mondays and Tuesdays typically show a negative effect, while Thursdays and Fridays display a positive impact. However, this pattern shifts notably during the COVID-19 pandemic, with all weekdays exhibiting significant positive impact, and varies further across different waves of the pandemic. The economic crisis period also shows unique weekday effects, particularly before and after an important political event.

Purpose: This chapter explores the linkage between sustainability and subjective well-being (SWB) in the workplace. This scoping review aims to present rational approaches to the linkage between sustainability and SWB at the workplace.

Need of the study: Sustainability aims to achieve social equity and justice through various initiatives so that present and future generations can enjoy resources without exploiting them. By adopting sustainable initiatives in our day-to-day lives, we can create a healthier equation between humans, work and nature.

Methodology: This scoping review explores the relationship between sustainability and SWB in the workplace. Employing the PRISMA method for synthesis, which is qualitative in nature, the review includes research papers published from 2014 to 2023.

Findings: Sustainable HRM encourages employees to engage in socially responsible initiatives and activities. Research demonstrated a positive correlation between well-being and desirable outcomes, including improved job performance, increased productivity and reduced employee turnover intention.

Practical implications: This review underscores the significance of implementing sustainable practices to enhance well-being across various levels within organisations, encompassing individual employees, teams, organisations as a whole and inter-organisational processes. Organisations can pave the way for a resilient future by prioritising sustainable actions today.

The purpose of this study is to explore the determinants influencing industrial adoption of green hydrogen amidst the global transition towards sustainability. Recognizing green hydrogen as a pivotal clean energy alternative for industrial applications is critical for understanding its potential integration into sustainable practices.

This research examines the impact of factors such as innovativeness, perceived ease of use, user comfort, optimism and governmental policies on the industrial intention towards green hydrogen usage. Using responses from 227 Indian industry professionals and conducting analysis via the SmartPLS software, the study reveals a discernible discomfort among industrial workers pertaining to the daily application of green hydrogen.

The research presents an array of policy recommendations for stakeholders. Emphasized strategies include the introduction of green hydrogen certificates, sustainable public procurement mechanisms, tax incentives, green labelling protocols and the establishment of a dedicated hydrogen skill development council, all of which can significantly influence the trajectory of green hydrogen adoption within the industrial sector.

This research synthesizes various elements, from industry perception and challenges to policy implications, presenting a holistic view of green hydrogen’s potential role in industry decarbonization and SDG realization. In essence, this study deepens not only the empirical understanding but also pioneers fresh theoretical frameworks, setting a precedent for subsequent academic endeavours.

Purpose: The purpose of the current chapter is to emphasize the importance of renewable energy sources and their impact on society’s desire to accept them in light of the substantial energy consumption that determines economic growth and its sustainability.

Need for the study: The ideals of sustainable development are the cornerstones of the green economy. This calls for the creation of new technologies and the adoption of eco-friendly practices that could spur economic growth and boosting efficiency. The chapter tries to measure total efficiency improvement after the adoption of green fuel.

Methodology: This is a qualitative research that uses secondary data sources. It is proposed to include a variety of online databases, e-journals, printed journals, periodicals, newspapers, etc., for the chapter. The scope of the chapter encompasses the discussion about the economic and environmental benefits of green energy resources.

Findings: The results show that the biggest advantages of employing green energy sources are typically acknowledged for their capacity to gradually lower the cost of electricity service, such as the avoided expenses of electricity generation or the avoidance of the need to build new power plants. These advantages may materialize in the short term, the long term, or both.

Practical implications: The result of the chapter implies improvements in life standards and environmental effects. This chapter put forth that renewable energy projects require complicated installation and are sensitive to the local ecology.

This paper aims to report the effect of titanium oxide (TiO₂) particles on the specific wear rate (SWR) of alkaline treated bamboo and flax fiber-reinforced composites (FRCs) under dry sliding condition by using a robust statistical method.

In this research, the epoxy/bamboo and epoxy/flax composites filled with 0–8 Wt.% TiO₂ particles have been fabricated using simple hand layup techniques, and wear testing of the composite was done in accordance with the ASTM G99-05 standard. The Taguchi design of experiments (DOE) was used to conduct a statistical analysis of experimental wear results. An analysis of variance (ANOVA) was conducted to identify significant control factors affecting SWR under dry sliding conditions. Taguchi prediction model is also developed to verify the correlation between the test parameters and performance output.

The research study reveals that TiO₂ filler particles in the epoxy/bamboo and epoxy/flax composite will improve the tribological properties of the developed composites. Statistical analysis of SWR concludes that normal load is the most influencing factor, followed by sliding distance, Wt.% TiO2 filler and sliding velocity. ANOVA concludes that normal load has the maximum effect of 31.92% and 35.77% and Wt.% of TiO2 filler has the effect of 17.33% and 16.98%, respectively, on the SWR of bamboo and flax FRCs. A fairly good agreement between the Taguchi predictive model and experimental results is obtained.

This research paper attempts to include both TiO₂ filler and bamboo/flax fibers to develop a novel hybrid composite material. TiO₂ micro and nanoparticles are promising filler materials, it helps to enhance the mechanical and tribological properties of the epoxy composites. Taguchi DOE and ANOVA used for statistical analysis serve as guidelines for academicians and practitioners on how to best optimize the control variable with particular reference to natural FRCs.