Download Database and Expert Systems Applications: 25th International by Hendrik Decker, Lenka Lhotská, Sebastian Link, Marcus Spies, PDF

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The gamification-based approach typically uses this incentive. The second type is to use reciprocity. People help other people. This trait encourages users to complete tasks to support other people. The trust relationship among people is the key to success when using reciprocity. The third type is social facilitation. Visualizing one’s differences from others is a useful technique when using social facilitation. When someone’s performance is not sufficiently high, using visualization to show how their performance is less than that of others can be effective.

The insights are valuable lessons learned while designing and operating the case studies and are essential to successful design strategies for building future more complex crowdsourcing services. Keywords: Social Media, Mobile Crowdsourcing, Design Strategy, Motivation, Community-Based Approach, Case Studies. 1 Introduction Social media have become increasingly popular in our daily life. We use Facebook1 and Twitter2 to expand our social interactions with both friends and non-friends every day.

On the other hand, term in affiliation sparsely appears, which is not intuitive for TF/IDF to model. Year attribute of virtual publications is the average of all publication years of papers. We define a segmented function for comparing virtual publication year. Definition 16 (Year Similarity). 75 |yi − yj | = 2 ⎪ ⎪ ⎩ 1 otherwise Notice that the five features in Table 1 can be combined to multi-aspect similarity feature vectors. Each feature vector corresponds to two virtual publications. However, we know that not all papers have complete information.