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The practice of paying for meals in a society is a social behavior that reflects the culture of that society. Accordingly, this study examined Koreans' way to pay for meal and perception of that meal payment methods in various contexts. In Study 1 and 2, Korean college students were asked open-ended questions about the payment methods that Koreans prefer in various situations, and asked to describe reasons for liking or disliking 9 payment methods derived by study 1. As a result, positive characteristics stood out as fairness such as rationality and fairness, as well as intimacy such as friendliness, affection. In Study 3 and 4, we investigated the perception of 6 payment methods (equal payment, membership dues payment, rotational payment, hierarchical payment, ability payment, and volunteering payment method) and examined whether there were generational differences in preferences for six payment methods depending on the situation. As a result, each payment method could be classified into a payment method closer to the logic of reason (sari), which emphasizes fairness, and the logic of heart (simjung), which emphasizes emotional intimacy. Payment method closer to fairness (equal method) was consistently preferred by young people. These results were discussed focusing on the cultural characteristics of Korean society. [ABSTRACT FROM AUTHOR]

The city is experiencing various problems such as traffic congestion, environmental pollution, urban crime, and faces the limit of growth. Recently, various attempts to build a Smart City have been spreading around the world, in order to solve these problems. Smart City is attracting attention as the core platform of the future city with the 4th industrial revolution. However, various definitions of smart city are mixed, and the methods and strategies for implementing smart city are changing or evolving due to the development of technology and the experience during that time. This study summarizes the definition of various smart city through literature review and suggests smart city building strategy that enables sustainable growth of cities as a platform of the 4th industrial revolution era. [ABSTRACT FROM AUTHOR]

Recently, with the sharp increase of digital visual media such as photographs, animations, and digital videos, it has been necessary to generate mosaic blocks in a static or dynamic image intentionally or unintentionally. In this paper, we suggest a new method for detecting mosaic blocks contained in a color image using boundary features. The suggested method first extracts Canny edges in the image and finds candidate mosaic blocks with the boundary features of mosaic blocks. The method then determines real mosaic blocks after filtering out non-mosaic blocks using geometric features like size and elongatedness features. Experimental results show that the proposed method can detect mosaic blocks robustly rather than other methods in various types of input images. [ABSTRACT FROM AUTHOR]