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This paper aims to describe the influence of maleinized linseed oil (MLO), when used as a lubricant, on the thermal and rheological properties of PLA/MWCNTs (polylactic acid/multi-walled carbon nanotubes) and PLA/HNT (halloysite nanotubes) nanocomposites, as a reference for application in 3D printing processes.

Nanocomposites were obtained by melting in a twin-screw extruder, mixing PLA with MWCNTs and HNTs in different percentages of 0.5, 0.75 and 1 Wt.% for subsequent mixing by the same process with 5 phr MLO, for application in additive manufacturing, as analyzed by means of differential scanning calorimetry (DSC), capillary rheometry, melt flow rate (MFL) and field emission scanning electron microscopy (FESEM).

The results obtained for thermal characterization by using DSC indicate the non-variation of glass transition temperature Tg = 62 ± 2°C and a melting temperature (Tm) around 170°C. Crystallization temperature dropped by approximately 12°C, which should be kept in mind during the transformation processes. The values obtained by capillary rheometry indicate that the material’s viscosity is reduced by the influence of the MLO plasticizer’s lubricant effect on the PLA’s molecular structure. The melt flow index values confirm a rise of approximately 46% in the flow index and back up the capillary rheometry results. The values obtained were as follows: PLA/0.5 Wt.% MWCNT/MLO 5 phr 54.07, PLA/0.75 Wt.% MWCNT/MLO 5 phr 53.46, PLA/1 Wt.% MWCNT/MLO 5 phr 51.84y PLA/0.5 Wt.% HNT/MLO 5 phr 61.8, PLA/0.75 Wt.% HNT/MLO 5 phr 68.3 and PLA/1 Wt.% HNT/MLO 5 phr 71.2 g/10 min. Apart from the nanocharge distribution, the information obtained from the FESEM shows the existence of a cluster, which could have been avoided by more energetic stirring during the nanocompound manufacturing process.

This paper presents an analysis of the insertion of plasticizer in nanocomposites for the application in additive manufacturing processes in fusion deposition modelling (FDM) system.

This is a novel original research work.

The purpose of this paper is to assess the feasibility and benefits of providing weight management support via the workplace.

Quasi-experimental design using non-random assignment to a 12-week Slimming World (SW) weight management programme, either within the workplace or at a regular community group. Weight was recorded weekly and a 39-item questionnaire focused on mental and emotional health, self-esteem, dietary habits and physical activity habits administered at baseline, 12 weeks, six and 12 months.

In total, 243 participants enroled (workplace n=129, community n=114) with 138 completers (defined as those weighing-in at baseline and attending at least once within the last four weeks; workplace n=76, community n=62). Completers reported a mean weight change of −4.9 kg±3.4 or −5.7 per cent±3.8. Mental and emotional health scores increased (p < 0.05) from baseline to 12 weeks. Self-worth scores increased (p < 0.05) from baseline to 12 weeks, six and 12 months. Healthy dietary habit scores increased and unhealthy dietary habit scores decreased (p < 0.05) from baseline to 12 weeks, six and 12 months. Healthy physical activity habit scores improved (p < 0.05) from baseline to 12 weeks and six months. There were no significant differences between groups.

Participant demographic was predominantly female (94 per cent) aged 42.3 years, with only 13 men participating.

The results support the use of a 12-week SW weight management programme as a credible option for employers wanting to support staff to achieve weight loss and improve psycho-social health outcomes which could lead to improvements in quality of life and work performance.

Provides evidence for the delivery of weight management support via the workplace.

This study is an attempt to apply the techniques of semiotics in conjunction with quantitative analysis to decode and interpret an advertisement which promotes the South Australian Barossa Valley as a tourist destination.

A survey was submitted to a Southeast Asian student and postgraduate sample. Regression analysis and qualitative analysis were carried out, which suggested that the advertisement was engaging the majority of the audience.

Most respondents expressed a desire to visit the location and used language which was evocative and connective. Those who did not or who were turned off by the advertisement's content expressed themselves in language which terminated further engagement.

The sample was a non-target group, but this is an advantage because it provides a base level of unconditioned response.

A better understanding of semiotics may reinforce other areas of marketing endeavour such as social marketing approaches which are gaining more importance in the still developing COVID-19 economy. This methodology can be extended to other marketing communication contexts.

Once campaigns have been aimed at target audiences, there may be potential to orientate another campaign at non-target audiences using the same advertisement. In terms of global marketing, this is extension rather than adaptation.

This study provides an example of how marketing could use semiotics in conjunction with quantitative methods to determine an audience's response and the intention to purchase a product or service.

In recent years, the proliferation of free trade agreements (FTA) has led to rapid economic boons and political security among nations. This study investigates whether the percentage of expats or permanent foreign residents plays a role in deciding which countries to partner with in bi-lateral FTAs. Previously, the reasons for FTA formation were believed to be primarily based upon economic, geographic, and political reasons. However, through the use of social network analysis, a larger picture can be mapped which allows for a more comprehensive understanding of key players in the current state of FTA formation in relation to the immigrant network that they share between them. More specifically, through computerized social network analysis, centrality can be calculated to determine the key players and the most central immigrant populations. When analyzing both the immigrant centrality in relation to FTA centrality, it becomes evident that there is a high correlation between the two factors. Thus, the findings highlight that immigration trends can be used as a predictor of FTA formation. As a result, it emphasizes the weight of immigration policy on the formation of bi-lateral FTAs.

This study aims to evaluate the awareness level of Islamic finance principles among employees of financial institutions in Moscow, Russia.

A quantitative method is used with a Likert scale questionnaire. A survey was conducted to 310 financial institutions’ employees to determine the level of their awareness of major Islamic finance principles. The sample population is selected using the judgment sampling technique. A descriptive analysis with frequency, percentage and weighted mean are used to analyze the data.

The study finds that the level of awareness of financial institutions’ employees towards Islamic finance is low. This is probably due to the minority of the Muslim population and geographically far from to the countries where Islamic finance is being implemented. All respondents have a good education background, thus implementing some training sessions for its employees or hiring some outside specialists could transfer the knowledge and widespread the adoption of Islamic finance instruments.

The academic institutions such as universities in Russia could play a pivotal role to offer Islamic finance-related subjects, while the government as a regulatory body, should support the Islamic finance initiatives.

The purpose of this paper is to investigate the roles of human resource development (HRD) in open universities. The study also intends to assess the current situation of HRD at Hanoi Open University (HOU) with an end view of proposing some suggested recommendations to enhance HRD to improve the training quality and effectiveness at HOU.

The study’s first two parts refer to HRD’s role in open universities. The third one summarizes the existing research literature on HRD used as theoretical base for the author to evaluate the current HRD at HOU in the fourth part. The fifth part involves the methodology to gather the data on HRD practices at HOU while the next two important parts deal with the study’s findings and recommendations for better HRD at HOU. The final part summaries the study’s main points. Referring methodology, the survey data were analyzed through frequency, percentage and weighted mean as statistical tools.

The study’s findings show that HRD practices at HOU are not as effective as expected in terms of human resource quality, human resource structure and human resource management. There is a shortage of full-time well-qualified employees, inadequate and imbalance working positions, and un-synchronous, fragmented personnel management.

The study’s values are not only useful for building policies on HRD but also for developing strategies to train and foster capable and adequate staff in open universities’ academic environment and in HOU as well.

This paper focuses on multi-objective order allocation with product substitution for the vaccine supply chain under uncertainty.

The weighted-sum minimization approach is used to find a compromised solution between three objectives of minimizing inefficiently vaccinated people, postponed vaccinations, and purchasing costs. A mixed-integer formulation with substitution quantities is proposed, subject to capacity and demand constraints. The substitution ratios between vaccines are assumed to be exogenous. Besides, uncertainty in supplier reliability is formulated using optimistic, most likely, and pessimistic scenarios in the proposed optimization model.

Covid-19 vaccine supply chain process is studied for one government and three vaccine suppliers as an illustrative example. The results provide essential insights for the governments to have proper vaccine allocation and support governments to manage the Covid-19 pandemic.

This paper considers the minimization of postponement in vaccination plans and inefficient vaccination and purchasing costs for order allocation among different vaccine types. To the best of the authors’ knowledge, there is no study in the literature on order allocation of vaccine types with substitution. The analytical hierarchy process structure of the Covid-19 pandemic also contributes to the literature.

This study aims to identify the location of the micropyle, the role of the micropyle in seed germination and the association between the micropyle size and seed weight of grass peas.

First, the micropyle was identified by cutting the seed in half and observing the seeds under the electron microscope. Second, the micropyle was covered by lanolin to block water imbibition. The rate of imbibition and germination was then observed. Lastly, micropyle sizes of various grass pea genotypes were identified by capturing seed images under a light microscope and converting the sizes to mm² using computer software (ImageJ).

The location of micropyle was located nearby the hilum, similar to soybean seeds. Seed imbibition was significantly lower in lanolin application (<87%) than in the control (>124%) after 24 hours of submergence. Germination was a day delay for lanolin application on the micropyle compared to lanolin application on the non-micropyle. The germination delay resulted in a significantly lower germination percentage at <57% on the micropyle lanolin application than at >79% on the non-micropyle lanolin application after 10 days of sowing. There is no correlation between the micropyle size and seed weight.

These findings add information on the location and the role of the micropyle for grass pea seed germination.

In this paper a systematic and well-defined student participation assessment scheme for college courses is proposed. The scheme supports the involvement of students in a variety of areas of participation within and outside the classroom with the aim of improving their learning. The scheme addresses mostly the challenges related to the practicality of the structure and design of the assessment. It also addresses the subjectivity of grading student participations. Areas of participation are widened to allow the faculty more accurate information about the conduct of each individual student towards more objective assessment. In addition, it provides the faculty with the flexibility to select areas that best fit the learning outcomes, nature of the course, availability of time and resources, and class atmosphere. The proposed scheme is initiated and developed using feedback from the teaching staff of Nizwa College of Technology, (NCT) through a survey and open discussion. The results indicate that over two thirds of the surveyed staff show agreement with the concept of assessing participation and find the scheme design clear and systematic, while 82% of them perceive the scheme as effective in improving the motivation and learning of students.

Weaknesses in the grades and standards system in low-income countries across Sub-Saharan Africa undermine the transparency of agricultural markets. In the Democratic Republic of the Congo (DRC), Ghana and Mozambique rice is predominately sold in open bags and if rice price does not reflect its quality, then inefficiencies may lead to consumer welfare losses. Importantly, it is possible that impoverished communities are priced out of the market due to inflated and inefficient prices. The objective of this study is to examine determinates of rice price by estimating the impact of selected rice quality attributes on rice prices in Democratic Republic of the Congo, Ghana and Mozambique.

We collected 363 rice samples from open air markets in Bukavu (DRC), Nampula (Mozambique) and across Ghana in 2019. Each rice sample was analyzed in a food science lab for the quality attributes: percentage of chalk and brokens, chalk impact, length and length-to-width ratio. We used multiple regression analysis to estimate if and to what extent quality attributes were the drivers of price.

Findings suggest that there are irregularities in the Ghanaian market for broken rice and that regardless of quality, imported rice is priced higher than domestic rice. In the DRC and Mozambique, our results indicate price is driven by length and length-to-width ratio in the former and length-to-width ratio in the latter.

Rice samples were purchased from market vendors and thus consumer preferences for attributes were not revealed.

These results provide valuable insight to policymakers regarding the need for proper labeling and regulation of open bag rice sales in an effort to increase consumer welfare and improve food security.