This study examine the manner by which media characteristics are reflected in text formation by-, focusing on book advertising on Instagram. By analyzing book advertising, i.e., a type of advertising text on Instagram, from a text-linguistic perspective, this study examines the textual characteristics of Instagram advertising texts and compares them with book advertisements in other media to identify the unique media characteristics of Instagram. Book advertising on Instagram can be categorized into three types: traditional, hide, and fan page. Differences in the structural characteristics and composition of linguistic and visual symbols are observed in each type. Compared with book advertisements in print and video media, the reversal technique due to page-type image exposure, direct exposure to the advertisement target, and intuitive advertisement-content organization can be regarded as examples that reflect the characteristics of Instagram as a medium. In particular, the structure of book advertisements comprising [thumbnail > text > conclusion] reveals the characteristics of the medium the most significantly. Additionally, various aspects such as the linear organization of verbal and visual symbols and hierarchical and complementary relationships, are observed, which are regarded as the characteristics of book advertisements on Instagram.

Objectives: The main purpose of this study was to identify problems such as cooking fumes and lack of ventilation in school cafeterias and evaluate the improvement in the reduction of indoor pollutants in the cooking rooms through renovation. Methods: Three schools were selected for renovation and the spatial structures and air conditioning system of the cafeterias and cooking rooms wre investigated after renovation. The air conditioning systems were improved by the renovation work according to the characteristics of each school, and the concentration of indoor pollutants was measured and evaluated through CFD analysis. Results: The concentration of indoor pollutants in the cafeterias and cafe rooms was decreased after renovation. Conclusion: Air conditioning systems in the schools cafeterias and cooking rooms were improved in order to solve the problems of ventilation, and the indoor air quality improvement rate ranged from a minimum of 11% to a maximum of 40%. The renovation of cafeterias and cooking rooms was conducted to optimize the ventilation systems and this contributed to indoor air quality improvement by preventing the inflow of pollutants.

In this paper analyzed the features of how native Korean speakers (K) and native Vietnamese Korean learners (VKL) organize the Apology conversation, focusing on the functional phase. Based on the discourse analysis, a role play was conducted to collect data. In order to investigate the influence of social variables (social status, intimacy), learners' mother tongues and learners' Korean proficiency, different social variables were given in role-play situations, and learners' Korean proficiency was limited to intermediate and advanced levels. The results of analyzing conversations focusing on ‘Error Checking–Apology-Apology Acceptance’, which is the intermediate phase of Apology conversation, are as follows. First, in the Error Checking Phase, K tended to make indirect or preliminary remarks. In contrast, VKL immediately presented communication purposes, and advanced VKL tended to use indirect speech and additional statement. Second, in the Apology phase, the higher social status the other party has and the lower intimacy the two speakers has, the more passive K were. Interestingly, VKL showed the same pattern. For intermediate-level VKL, it was observed that the dialogue sequences were not completed. Third, in the Apology Acceptance phase, K repeatedly expressed apologies through complex dialogue sequences. However, VKL performed a concise conversation by simple dialogue sequences, and the intermediate-level VKL expressed ‘relief’ and ‘gratitude’.