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Political Discourse on Twitter: The Case of Election Fraud in South Korea
Jongmyung Lee,Daesik Kim,Chung Joo Chung 한국학술연구원 2024 Korea Observer Vol.55 No.1
The fake news that circulated on social media in 2020 and 2022 affected the voters of the South Korean general and presidential elections, respectively. The political controversy, centered on the election fraud that occurred in both the elections, received significant attention from the society. This study emphasizes the Twitter discourse and compares the formation and distribution of election fraud. We conduct semantic social network analysis and structural topic modeling (STM) to represent topics and relationships among the emerging themes using Twitter texts related to both elections. Results demonstrate that discourses on the same political issue exhibited unique contents and structures, as information is formed and distributed differently depending on the type of election in South Korea. Furthermore, this study illustrates the process and analysis of large-scale text data collected from Twitter. It also includes new methods, such as political ideology, for considering an analytical dimension.
A Web-based Context-aware Cultural Content Service System
Jongmyung Choi,Sangdon Lee,Seokwon Jung,Sangil Lee,Sook Yoon,Hyun Kyung Cho 한국콘텐츠학회 2009 ICCC International Digital Design Invitation Exhib Vol.2009 No.12
As the amount of information increases drastically, users have difficulties in choosing suitable information from the huge information submitted as the result of web search. In particular, the cultural content service is much harder because its readers range from elementary school students to university professor since it is related to the history and culture of a nation. In this paper, we propose a context-aware cultural content management and content services for meeting the diverse requirements from readers. We consider background knowledge level, language, and intention as the context information.
CFD modeling of ventilation ducts for improvement of air quality in closed mines
Jongmyung Park,Samgyu Park,이동길 한국자원공학회 2016 Geosystem engineering Vol.19 No.4
Decommissioned, dead-end mining tunnels or natural caves are employed to investigate new usage in Korea. Ventilation ducts are designed to allow control of flow velocities, mean age of air, and temperatures of blown air. Turbulent air flows within a dead-ended tunnel are theoretically predicted using the numerical code with a κ − ε turbulence model, and 3.5 M hexahedral grids. Three-dimensional turbulent transport, detailed flow structural characteristics, dimensionless temperature, and local mean age of air are considered to provide new insight into the mechanisms needed to design the ventilation duct for tunnels. Time-averaged turbulent flow characteristics, velocity shape path lines, fluid age distributions, and temperature distributions are presented for 5% inlet turbulence intensity and 12 m/s inlet velocity. From CASE1 to CASE6, six different geometries of ventilation duct are used to optimize the design for better air quality. Overall, the numerically predicted results show the air is fresher in the long duct and average temperatures in the tunnel with long ventilation ducts are slightly lower than those in a tunnel with short ducts.
E-Textbook with Lecturer-Created Quiz Capabilities
Jongmyung Choi,Iksu Kim 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.5
The e-book industry has been growing very fast for the last several years, and the e-book sales at Amazon.com already surpassed the printed books at the end of 2010. In the near future, the printed textbooks in K-12 and in higher education will be replaced by the e-textbooks that support multimedia and user interaction. Furthermore, the future e-textbooks will support user interactive quizzes and instant feedbacks on the quizzes for students’ better learning and lecturers’ better teaching. Quizzes and feedback in classes are very common and helpful to check students’ understanding and to correct their misunderstanding. However, the current e-textbooks support only limited capabilities for quizzes and feedback. For example, they do not support interactive quizzes, instant feedbacks, statistics for students’ understanding, or methods for lecturers to make their quizzes in the e-textbooks. In this paper, we propose an e-textbook system that supports interactive quizzes, instant feedback, and quiz-maker, which allows lecturers to make their own quizzes at schools after deploying e-textbooks. Using this e-textbook system, lecturers can make quizzes at any pages in the e-textbooks, and students are able to check their understanding efficiently with instant feedback while reading the books. We also introduce our prototype system, which is implemented utilizing HTML5. The prototype system has advantages such as device independence, ease to implement and low cost.