title: Hemp fibre reinforced composites using chelator and enzyme treatments

authors: Li, Yan

subjects: short-fibre composites

abstract: The main objective of the current work was to investigate using chelator treatment, and combined chelator and enzyme treatments, to separate hemp fibre from its bundles, as well as remove non-cellulosic compounds, and thus therefore improve the interfacial bonding in the composite. Wet chemical analysis, FTIR, X-ray diffraction (XRD), thermal analysis and single fibre tensile testing were used to characterise the effect of treatment on hemp fibres. The higher chelator concentration treated hemp fibre composites had the highest tensile strength of 42 MPa, an increase of 19% compared to composites with untreated hemp fibre.

text: Hemp fibre reinforced composites using chelator and enzyme treatments The main objective of the current work was to investigate using chelator treatment, and combined chelator and enzyme treatments, to separate hemp fibre from its bundles, as well as remove non-cellulosic compounds, and thus therefore improve the interfacial bonding in the composite. Wet chemical analysis, FTIR, X-ray diffraction (XRD), thermal analysis and single fibre tensile testing were used to characterise the effect of treatment on hemp fibres. The higher chelator concentration treated hemp fibre composites had the highest tensile strength of 42 MPa, an increase of 19% compared to composites with untreated hemp fibre.

year: 2010

title: The Prevalence and Targets of Cyberbullying Behaviours: An Observational Approach

authors: Hodge, Emma-Leigh

abstract: The online environment has few boundaries and is evolving quickly, which may enable a greater prevalence of negative behaviour, like cyberbullying. Most cyberbullying researchers have used self-report methodologies, focussed on young people, and have had limited ability to explore contextual factors such as whether messages were retaliatory. Using stratified sampling, we selected a total of 40 YouTube® clips showing singing or dancing performances by young girls and boys. We conducted an exploratory content analysis using the first 20 comments for each of these clips (n = 800), coding eight quantitative factors and identifying themes for each comment. The key measure was the degree of positivity of each comment towards the performer in the clip, and if applicable, the degree of positivity towards the other commenters. Negative comments were directed at performers in 20% of the observed cases, whereas 74% of the comments directed at other commenters were negative, suggesting that commenters are most at risk of receiving negative comments online. Male performers received more negative comments than female. About a third of commenters appeared to criticise users for posting negative comments towards others, which is of continued interest because bystander intervention may mitigate some of the harmful effects of cyberbullying.

text: The Prevalence and Targets of Cyberbullying Behaviours: An Observational Approach The online environment has few boundaries and is evolving quickly, which may enable a greater prevalence of negative behaviour, like cyberbullying. Most cyberbullying researchers have used self-report methodologies, focussed on young people, and have had limited ability to explore contextual factors such as whether messages were retaliatory. Using stratified sampling, we selected a total of 40 YouTube® clips showing singing or dancing performances by young girls and boys. We conducted an exploratory content analysis using the first 20 comments for each of these clips (n = 800), coding eight quantitative factors and identifying themes for each comment. The key measure was the degree of positivity of each comment towards the performer in the clip, and if applicable, the degree of positivity towards the other commenters. Negative comments were directed at performers in 20% of the observed cases, whereas 74% of the comments directed at other commenters were negative, suggesting that commenters are most at risk of receiving negative comments online. Male performers received more negative comments than female. About a third of commenters appeared to criticise users for posting negative comments towards others, which is of continued interest because bystander intervention may mitigate some of the harmful effects of cyberbullying.

year: 2022

title: How Maui captured the sun: using a MUD for educational simulation

authors: Cunningham, Sally Jo

subjects: computer science

abstract: MUDs (Multi-User Dungeons) are text-based, multi-user communication and modelling programs. This paper investigates the potential of a popular extensible MUD, the LambdaMOO system, as a tool for second language training and for educational simulation gaming.

text: How Maui captured the sun: using a MUD for educational simulation MUDs (Multi-User Dungeons) are text-based, multi-user communication and modelling programs. This paper investigates the potential of a popular extensible MUD, the LambdaMOO system, as a tool for second language training and for educational simulation gaming.

year: 1995-12