The purpose of this paper is to explore the possibility of an enhanced continuous liquid interface production (CLIP) with a porous track-etched membrane as the…
The purpose of this paper is to explore the possibility of an enhanced continuous liquid interface production (CLIP) with a porous track-etched membrane as the oxygen-permeable window, which is prepared by irradiating polyethylene terephthalate membranes with accelerated heavy ions.
Experimental approaches are carried out to characterize printing parameters of resins with different photo-initiator concentrations by a photo-polymerization matrix, to experimentally observe and theoretically fit the oxygen inhibition layer thickness during printing under conditions of pure oxygen and air, respectively, and to demonstrate the enhanced CLIP processes by using pure oxygen and air, respectively.
Owing to the high permeability of track-etched membrane, CLIP process is demonstrated with printing speed up to 800 mm/h in the condition of pure oxygen, which matches well with the theoretically predicted maximum printing speed at difference light expose. Making a trade-off between printing speed and surface quality, maximum printing speed of 470 mm/h is also obtained even using air. As the oxygen inhibition layer created by air is thinner than that by pure oxygen, maximum speed cannot be simply increased by intensifying the light exposure as the case with pure oxygen.
CLIP process is capable of building objects continuously instead of the traditional layer-by-layer manner, which enables tens of times improvement in printing speed. This work presents an enhanced CLIP process by first using a porous track-etched membrane to serve as the oxygen permeable window, in which a record printing speed up to 800 mm/h using pure oxygen is demonstrated. Owing to the high permeability of track-etched membrane, continuous process at a speed of 470 mm/h is also achieved even using air instead of pure oxygen, which is of significance for a compact robust high-speed 3D printer.
Globalisation is generally defined as the “denationalisation of clusters of political, economic, and social activities” that destabilize the ability of the sovereign State to control activities on its territory, due to the rising need to find solutions for universal problems, like the pollution of the environment, on an international level. Globalisation is a complex, forceful legal and social process that take place within an integrated whole with out regard to geographical boundaries. Globalisation thus differs from international activities, which arise between and among States, and it differs from multinational activities that occur in more than one nation‐State. This does not mean that countries are not involved in the sociolegal dynamics that those transboundary process trigger. In a sense, the movements triggered by global processes promote greater economic interdependence among countries. Globalisation can be traced back to the depression preceding World War II and globalisation at that time included spreading of the capitalist economic system as a means of getting access to extended markets. The first step was to create sufficient export surplus to maintain full employment in the capitalist world and secondly establishing a globalized economy where the planet would be united in peace and wealth. The idea of interdependence among quite separate and distinct countries is a very important part of talks on globalisation and a significant side of today’s global political economy.
The purpose of this study is to examine the effect of marathon enthusiasts' perceptions towards venue quality, race competition, organisation and service quality on their…
The purpose of this study is to examine the effect of marathon enthusiasts' perceptions towards venue quality, race competition, organisation and service quality on their intention to participate in a destination marathon in the emerging region's context. It also seeks to investigate the mediating effect of perceived value and the moderating effect of intention to visit the destination on the intention to participate.
Using purposive sampling technique, 177 valid Singapore marathon enthusiasts were sampled to look into their intention towards participating in destination marathon in Sarawak (marathon held in Kuching). The data were analysed using the partial least squares–structural equation modelling (PLS–SEM).
The results show that amongst the other determinants, perceived organisation and perceived service quality do not contribute to perceived value and intention to participate in destination marathon. Perceived value is found to mediate all path relationships except the relationship between perceived organisation and intention to participate. Moreover, the relationship between perceived value and intention to participate is significantly moderated by intention to tour Sarawak.
This study makes a substantial contribution to the extant literature pertaining to destination tourism and value-based marketing in an emerging market. In particular, it highlights the importance of perceived value and the relevance of destination tourism in joining a sport event on foreign soil. The use of PLS–SEM also allows a rigorous assessment of the relationships under investigation and provides better estimations of the phenomenon.