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This paper examine in detail the impact of the crowdsourcee's vertical fairness concern on the knowledge sharing incentive mechanism in crowdsourcing communities. The conditions for the establishment of the incentive mechanism is analyzed and he impact of fairness concern sensitivity on expected economic revenues of both sides as well as the crowdsourcing project performance is studied by game theory and computer simulation. The results show that the knowledge sharing incentive mechanism can only be established if the ratio between the performance improvement rate and the private cost reduction rate caused by shared knowledge is within a certain range. The degree of the optimal linear incentives, the private solution efforts, and the improvement of knowledge sharing level are positively correlated with the sensitivity of vertical fairness concern. In the non-incentive mode, the ratio between the performance conversion rate of private solution effort and the performance conversion rate of knowledge sharing effort plays an important role in moderating a crowdsourcing project's performance. We find that the number of participants is either conducive or non-conducive to the improvement of performance.

This study investigates how the ageing population interact with objects, what kind of bond individuals form using their assistive devices, and what methods are applied during the product design process to help improve the user experience leading to a long-term product relationship? This research aims to conduct a longitudinal study involving/discussing the interplay between end-user, designer and product. By developing an evaluation tool with which to describe and analyse the bond people form with their assistive devices and integrate the human emotions as a factor during the development of the product design process. The focus will be on the assistive technology market, namely, the aid-for-daily-living market targeting the seniors in the UK, to increase the quality of wellbeing. Findings will enable a better understanding of the real issues of the product experience relating to individuals' interaction throughout the product performance, establishing awareness of the emotional effects of fostering the product attachment, and help product developers and future designers create a connection between users and their assistive devices. The research concludes by discussing the implications of these findings for professionals and academics to identify new areas that can stimulate new /or developed design directions. The result of this paper will define plans for further investigation as part of a current PhD research project. Framework and evaluation tools are currently being developed and will soon follow this publication.