Abstracts ABOUT 6 th WORLD CONGRESS OF BIOMECHANICSThe 6th World Congress of 8iomechanics is hosted by 8iomedical Engineering ~ociety of Singapore (8ES) together with the Global Enterprise for Micromechanics and Molecular Medicine (GEM4) and the National University of Singapore (NUS), in conjunction with the 14th International Conference on 8iomechanical Engineering (lC8ME) and the 5th Asian Pacific Conference on 8iomechanics (AP8iomech). With over 2,000 delegates from ali over the World, especially from the Asia Pacific region, to attend thís congress, this 8iomechanics conference explores a ..vide field such as organ mechanics, tissue mechanics, cel! mechanics to molecular mechanícs.At lhe 6th World Congress of 8iomechanics, authors would be presenting the largest experimental studies, technologies and equipment. Special emphasis will be placed on state-of-the-art technology and medicai applications, for example in areas Df sports medicine and crash injuries.
Natural fibre composites have some mechanical and environmental advantages when compared with synthetic ones and the environmental advantage can, even, be improved if the base materials are autochthonous. In this work are analysed two factors concerning natural fibre composites characteristics: fibre type influence and fibre surface alkali-silane treatment. For this purpose, it was defined an orthogonal array of experiments where the levels of sodium hydroxide (NaOH) concentration were changed and used over flax and hemp fibres. The matrix of composite was, always, polyester resin and six plates were manufactured with different combinations among alkali-silane treatment and fibre types. To evaluate the composite mechanical characteristics eighteen tensile tests were performed and it was calculated the average tensile strength for each combination. The combination that brings the highest value of tensile strength was the flax composite associated with the alkali-silane fibre surface treatment with 5% of concentration of NaOH, which resulted in 113 MPa. The most influent factor to maximize the tensile strength was the alkali-silane fibre surface treatment, with a contribution of 53.0%.
The Taguchi method is a powerful tool to experiment design optimization and is used in this work to optimize the cutting parameters, which reduce the chatter effect on surface quality. The present study includes feed per tooth, cutting speed, radial and axial depth of cut as control factors. An orthogonal array of L16 was used with the ANOVA analyses in order to identify the significant factors associated to the surface roughness and chatter vibration in three different directions. The optimal cutting combination for the surface finishing was determined through the analysis of surface roughness. This are correlated with the vibrations levels recorded during the experimental tests. The study was carry-out by machining a hardened steel block with tungsten carbide coated tools. The results led to the minimum of arithmetic mean surface roughness of 1.05 µm which corresponded to a minimum of the mean vibration level.
Background: Working donkeys represent an important source of energy worldwide. Poor working conditions and equipment affect their ability to work. Poorly designed, ill-fitted harness causes inefficient transfer of power and leads to health and welfare issues. Using technology to assess different types of collars provides a better understanding of those that are most efficient for working donkeys. Materials and methods: Seven different collars were tested using pressure pads. Contact area, median, maximum and peak pressures were obtained for the whole collar and critical points. Eight donkeys pulled 20% and 40% of their body weight, using each collar, under controlled conditions. Results: Contact area and pressures vary between collars and effort, with design and expansion capacity of the collars playing a major role. Simple collars designed specifically for donkeys performed well, with full collars designed for horses also having good results. Due to reduced expansion capacity and contact in the critical points, the breast collars were the least effective. Conclusion: Design, appropriate padding and manufacturing materials and adjustment capacity are key features for good collars, and such parameters are of paramount importance in terms of health and welfare for working donkeys.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.