Recently, there has been an increase in the number of studies conducted on the process of developing hydroxyapatite (HA) to use in biocomposites. HA can be derived from natural sources such as bovine bone. The HA usage obtained from green mussel shells in biocomposites in this study will be explored. The research goal is to investigate the composition effect of biomaterials derived from polycaprolactone (PCL), polylactic acid (PLA), as well as HA obtained from green mussel shells with a chemical blending method on mechanical properties and degradation rate. First, 80 mL of chloroform solution was utilized to immerse 16 g of the PLA/PCL mixture with the ratios of 85:15 and 60:40 for 30 min. A magnetic stirrer was used to mix the solution for an additional 30 min at a temperature and speed of 50 °C and 300 rpm. Next, the hydroxyapatite (HA) was added in percentages of 5%, 10%, and 15%, as well as 20% of the PLA/PCL mixture’s total weight. It was then stirred for 1 h at 100 rpm at 65 °C to produce a homogeneous mixture of HA and polymer. The biocomposite mixture was then added into a glass mold as per ASTM D790. Following this, biocomposite specimens were tested for their density, biodegradability, and three points of bending in determining the effect of HA and polymer composition on the degradation rate and mechanical properties. According to the findings of this study, increasing the HA and PLA composition yields a rise in the mechanical properties of the biocomposites. However, the biocomposite degradation rate is increasing.

The use of internet has become a way of living since its inception in the 80s. With the advancement of informatics technologies, it has also created an unprecedented pressure to the education sector in keeping up with the pace of change in societal needs and technological innovations. It is with the aim of facilitating better learning outcomes attainment at tertiary education level among the digital natives, this study is set to find out how frequently technology savvy students use the internet and what the key internet activities are. The findings are subsequently analyzed to establish a correlation between the frequencies of internet usage and preferred learning style. It is observed that the primary internet usage of 784 respondents is in entertainment and communication in their daily internet routine. However, the association of the internet with the preferred learning style is inconclusive.

No abstract

The rapid progress in the competitive business environment has increased customer expectations and demands, thus leading to a situation where many companies are competing fiercely, especially low-cost airline companies or low-cost carriers (LCCs). The company carries out a strategy of providing satisfaction for its passengers to generate great loyalty. The purpose of this study is to find out what factors can affect passenger loyalty, such as service quality (SQ), price (P), customer satisfaction (S), and perceived value (PV) on LCC airlines in Indonesia. This study used quantitative methods through surveys which were conducted on 313 respondents in Indonesian, via online questionnaire data collection in July–August 2021. To test the relationship between variables, this study used statistical analysis with LISREL structural equation modelling (SEM). The present study was conducted concerning LCC companies in Indonesia and refers only to Indonesian consumers. There are 7 hypotheses in this study, of which 4 hypotheses are confirmed and 3 are invalidated. Some results obtained show that, in this case and with reference to Indonesian consumers only for the substitution service offered by LCCs, we have to discuss atypical manifestations of consumer behaviour (good SQ does not necessarily lead to increased S and lower price does not necessarily lead to increased S, etc.). At the same time, this study shows that consumer loyalty remains the essential factor for the survival of LCCs in the market.