• The Korean Journal of Applied Statistics
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• v.36 no.5
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• pp.489-499
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• 2023

As sharing of analyst reports became widely available, reports generated by analysts have become a useful tool to reduce difference in financial information between market participants. The quantitative information of analyst reports has been used in many ways to predict stock returns. However, there are relatively few domestic studies on the prediction power of text information in analyst reports to predict stock returns. We test stock return predictability of text in analyst reports by creating variables representing the TONE from the text. To overcome the limitation of the linear-model-assumption-based approach, we use the random-forest-based F-test.

• The Korean Journal of Applied Statistics
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• v.36 no.6
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• pp.561-571
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• 2023

Volatility of a time series is defined as the conditional variance on the past information. In particular, for financial time series, volatility is regarded as a time-varying measure of risk for the financial series. To capture the intrinsic asymmetry in the risk of financial series, various asymmetric volatility processes including threshold-ARCH (TARCH, for short) have been proposed in the literature (see, for instance, Choi et al., 2012). This paper proposes a volatility function featuring non-zero origin in which the origin of the volatility is shifted from the zero and therefore the resulting volatility function is certainly asymmetric around zero and achieves the minimum at a non-zero (rather than zero) point. To validate the proposed volatility function, we analyze the Korea stock prices index (KOSPI) time series during the Covid-19 pandemic period for which origin shift to the left of the zero in volatility is shown to be apparent using the minimum AIC as well as via parametric bootstrap verification.

• The Korean Journal of Food And Nutrition
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• v.36 no.6
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• pp.588-604
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• 2023

This study was conducted to investigate whether there were differences in eco-friendly food, home meal replacement (HMR) purchases, and eating-out behavior according to the level of agri-food consumer competence. The data for the study were extracted from main food consumers (n=3,321) in the 2022 Food Consumption Behavior Survey. The competence index was divided into awareness-attitude-practice items, and three groups were classified by competence level. The results showed an agri-food consumer competency score of 70.62, with the highest score for awareness (73.96), followed by practice (69.28) and attitude (66.18). The frequency of purchasing eco-friendly food was higher in the excellent group compared to other groups, and quality and price satisfaction was higher with higher competency (p<0.001). Regarding HMR, the results showed that the shortage group had the lowest HMR consumption rate, and satisfaction decreased as competence decreased (p<0.001). The main reason for eating-out was to enjoy food in all groups (59.0%), followed by a lack of cooking time in the excellent group (15.7%) and hassle with food preparation in the moderate and shortage groups (17.3%, 16.6%) (p<0.001). In short, agri-food consumption competency showed differences by contents and components, and differences in food purchases and eating-out behavior by competency level were found.

• Journal of Practical Engineering Education
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• v.16 no.1_spc
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• pp.21-31
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• 2024

This study focused on the development of an AI essay tool for assessing writing-communication competence using ChatGPT. During the development process, the interaction between content expert and technical expert was emphasized to explore the fusion of IT and humanities and social sciences. Through close communication and interaction between the content and technical experts, they incorporated scoring criteria for writing-communication competence and developed an AI essay test tool that provides scores and feedback in the appropriateness of content, effectiveness of organization, and accuracy of grammar. This process revealed how content and technology combine and presented considerations for future fusion researchers, including technical experts in generative AI assessment tools.

• Journal of Korean Society of Archives and Records Management
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• v.24 no.1
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• pp.89-109
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• 2024

The study analyzed the research trends of domestic and international record information services from 2003 to 2022. A total of 136 academic papers registered in the Korea Citation Index (KCI) and 74 from the Library, Information Science & Technology Abstracts (LISTA) were examined by quantitative and qualitative content analysis to understand the research status of 20 years from various angles, such as publication year, research type, researcher type, subject, and purpose. Frequency analysis, co-occurrence frequency analysis, centrality analysis, and topic modeling were performed by applying text mining techniques. Results showed that domestic papers demonstrated a research flow focused on specific institutions or records, and user-centered satisfaction surveys and content-centered studies were conducted. Moreover, foreign papers confirmed various evaluation-oriented and information provision studies, such as data, resources, and collections, along with the research trend focusing on the relationship between archivists and users. The management of information resources was identified as a common topic in both domestic and foreign papers, but it is possible to identify that domestic research focuses on maintaining the quality of domestic information resources, while foreign research focuses on the storage and retrieval of information.

• Journal of the Korean Society for Library and Information Science
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• v.58 no.1
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• pp.285-302
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• 2024

For this article, we conducted frequency analysis, topic modeling, and network analysis on eleven texts related to collection development policy found in the National Library of Korea. We deduced the main keywords related to collection development policies and analyzed the relationship between them. We subsequently conducted a pie coefficient analysis to identify the characteristics of collection development policies of university libraries and public libraries by category. The results showed that keywords such as "material," "library," "collection development," "user," and "collection" were the main keywords in frequency analysis and network centrality. Meanwhile, the pie coefficient analysis revealed that keywords such as "university," "construction," "student," "target," and "cost" were prevalent in university libraries, indicating that the academic needs of users and the discussion of digital resources were primary issues, while keywords related to the information needs of various user groups-including "adults," "survey," "feature," and "religion" -appeared in public libraries.

• Korean Journal of Culture and Social Issue
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• v.30 no.1
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• pp.35-53
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• 2024

As dating violence is recently rising as one of the most serious social issues, the study examined the effect of internalized shame on controlling behavior manifested in dating relationship. We explored the mediation effect of self-absorption, indicating maladaptive self-focused attention, between each of the four sub-factors of internalized shame(inadequacy, emptiness, self punishment, and fear of mistake) and controlling behavior. Based on the data obtained from 200 single people in their 20-30s, it was revealed that the internalized shame, the self-absorption, and the controlling behavior in dating relationships were all positively correlated. The mediation effect of self-absorption was significant between the sub-factors of internalized shame (inadequacy, emptiness, self punishment, and fear of mistake) and controlling behavior. In other words, the higher the inadequacy, emptiness, self punishment, and fear of mistake, the bigger the self-absorption, and the more frequent the controlling behavior in dating relationship.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.203-204
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• 2015

전 세계적으로 저성장이 지속되고 있다. 이에 각국은 새로운 성장 동력 마련에 고심하고 있으며, 저성장을 겪고 있는 우리나라 또한 창조산업을 통해 경제성장 및 일자리 창출을 높이겠다는 '창조경제'를 국정과제로 내세우고 이를 달성하기 위해 노력 중이다. 이와 같은 창조경제의 핵심 요소는 기업가정신이다. 하지만, 창조경제를 견인할 청년층의 기업가정신이 쇠퇴하고 있다. 이에 최근 정부와 학교, 민간단체에서 청년층의 기업가정신 함양을 위한 교육을 강화하고 있다. 이 중 기업가정신 교육이 활발하게 이루어지고 있는 숙명여자대학교의 사례를 살펴보고 대학에서 이루어지는 기업가정신 교육이 나아갈 방향에 대해 살펴보고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.145-147
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• 2007

현재 기술은 모든 생활을 간편하고 빠르게 할 수 있는 체제로 지속적으로 발전하고 있다. 그에 따라 발달된 기술에 맞는 컨텐츠의 개발이 필요하다. 시간의 효율적인 사용이 성공을 가늠하는 중요한 사회에서 본 연구는 숙명여대 학생을 대상으로 식사시간의 효율적인 사용법을 제안한다. 지능형 주문대행업체는 간편하고 빠르게 음식을 주문 할 수 있는 서비스를 제공한 프로그램이다. 이는 모바일과 웹상에서 간편하게 프로그램과 연계된 음식점 업체로 주문을 할 수 있고 최종 배달까지의 시간을 명시해 줌으로써 바쁜 현대인들의 효율적인 시간 관리에 도움을 준다.

• Vending industry
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• v.8 no.3
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• pp.58-61
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• 2008

사람이 살아가기 위해선 먹어야 한다. 신체에 필수적인 에너지를 공급받기 위해선 싫든 좋든 먹어야 하는 게 인간의 숙명이다. 그래서 한국인의주식인 쌀은 오랫동안 사랑을 받아 왔다. '든든한 밥 힘'이 있어야 만사가 잘 풀린다는 생각은 한국인 공통적 사고방식이라 할 만큼 쌀은 절대적인 식량자원이다. 그런데 이런 쌀에 대해 제대로 아는 사람이 많지 않다. 보통 쌀이라 하면 흔히 먹는 백미를 기준으로 삼고, 조금 더 나아가야 현미 정도를 생각한다. 그리고 이들 쌀의 좋고 나쁨은 일반적으로 생산지, 농경지 기준으로 생각을 하는 게 일반적이다. 반면 정작 중요한 도정시기에 따라 밥의 건강과 맛이 달라 질 수 있다는 사실은 그리 중요하게 생각지 않는다. 한국나락판매는 쌀 시장에 있어 이런 차별성을 주목하고 오분도미 자동판매기라는 사업 아이템을 발굴해 냈다. 쉽게 말해 '즉석 도정한 신선한 쌀'을 파는 자동판매기이다. 쌀을 자판기를 통해 구입한다는 유통의 차별성만을 갖추는데 머무르지 않고, 자판기를 통하지 않고서는 구입하기 힘들다는 내용상품으로서의 희소성까지 갖추고 있다. '건강 최고! 맛 최고! 새로운 밥맛의 세계를 연다'를 기치로 본격적인 시장공략에 나선 한국나락의 오분도미 자동판매기 사업현황을 따라가 봤다.