• 한국초등과학교육학회지:초등과학교육
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• 제36권4호
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• pp.379-393
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• 2017

This study analyzed the relationship between self-directedness of science-gifted elementary students and their expression of scientific creativity in science-gifted class. A science-gifted program on the topic of Hydraulic Machine was implemented to 34 fifth-graders in the Science-Gifted Education Center of an education office in Seoul, Korea for four weeks. The self-directedness of the gifted students was divided into three types of 'General, Scientific, and Topic-Related Self-Directedness'. The products of the students' activities were assessed by using a scientific creativity assessment formula. Qualitative research, such as analysis of observations and interviews, was also conducted in order to identify characteristics that were not apparently revealed by quantitative data. The main results of this study are as follows: First, science-gifted elementary students' general self-directedness and their scientific creativity were significantly correlated (r=.373). Second, the students' scientific self-directedness and scientific creativity did not have a significant correlation (r=.294). Third, there was a positive correlation between the students' topic-related self-directedness and their expression of scientific creativity. Their self-rated scores (r=.420) for the topic-related self-directedness and the number of activity types associated with the topic had a positive correlation (r=.350). Fourth, the students were categorized into four groups according to the levels of their self-directedness and scientific creativity, and the result showed that Type HH (high self-directedness and high scientific creativity) was the most common type (15 students, 38.5%), followed by Type LL (low self-directedness and low scientific creativity) (11 students, 28.2%). Eight (20.5%) and five students (12.8 %) belonged to Type LH (low self-directedness and high scientific creativity) and Type HL (high self-directedness and low scientific creativity) respectively. Fifth, the classroom observation of the students in groups revealed that groups with more number of Type HH demonstrated better cooperation and performance. Sixth, the analysis results of the observation were almost matched to the results of the self-directedness and scientific creativity tests. The students with higher self-directedness demonstrated active class participation and good cooperative skills. The students with higher scientific creativity had a tendency to generate creative ideas more frequently in given situations. Seventh, dynamic activities were perceived as enjoyable and exciting by 76.9% of the students, but static activities that require creativity were regarded as interesting only by 23.1% of the students. Among the students who were satisfied with both the creative and static activities, Type HH accounted for the largest proportion (55.6%). In conclusion, factors such as students' interests, initiatives, and attitudes displayed through voluntary participations originated from their own daily life can predict the degree of scientific creativity associated with the topic. Also, when students were categorized into four types according to the level of self-directedness and scientific creativity, there was a tendency of active behavior in class, cooperative skill, and activity satisfaction. This suggested that we should consider self-directedness and scientific creativity in selecting the gifted, grouping them in class, and designing and executing programs for science-gifted elementary students.

• 한국산업정보학회논문지
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• 제25권3호
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• pp.39-51
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• 2020

본 연구에서는 공유경제의 다양한 비즈니스 모델 중 공유주차로 범위를 제한하고, 이와 관련된 리뷰를 수집한 후 텍스트마이닝 분석을 통해 공유주차가 갖고 있는 사회적 이슈와 소비자 인식에 대해 살펴보고자 한다. 본 실험에서는 TFIDF (Term frequency inverse document frequency) 기법과 LDA (Latent dirichlet allocation) 기법을 이용하여 키워드별 토픽을 추출하여 분석한 결과 소비자들이 필요로 하거나 원하는 정보들을 파악할 수 있었으며, 토픽으로 분류한 결과 지자체 협약, 주차공간협소, 주차문화개선, 시민참여 등 시민들의 불만과 시민의식이 공유주차 서비스를 시행하는데 중요한 역할을 하고 있다는 것을 확인할 수 있었다. 본 연구는 정성적 연구, 기업 및 지역의 사례를 이용하여 기존의 탐색적 연구를 수행한 선행 연구와는 차별화된 연구로 학술적 기여도가 높다고 할 수 있다. LDA 분석을 본 연구에 활용하여 나타난 결과를 바탕으로 지역경제 활성화를 위한 공유경제 정책 수립에 응용하거나 활용할 수 있다는 실무적 기여도가 있다.

• 한국콘텐츠학회논문지
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• 제18권10호
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• pp.53-64
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• 2018

본 연구는 종편 도입으로 인한 방송 뉴스 콘텐츠의 주제 구성과 다양성의 변화를 살펴보기 위해 종편 도입 초기 4년 간 지상파 3개, 종편 4개 총 7개 채널의 메인 뉴스의 주제를 내용분석 하였다. 분석결과 지상파는 다양한 주제를 폭넓게 다뤘던 반면 종편 뉴스는 정치 뉴스에 집중하며 주제 구성에 있어서 지상파와 차별화를 꾀하였다. 뉴스 구성 순서나 주요 뉴스 포함 여부에 있어서 종편은 정치 뉴스와 북한 뉴스를 적극 활용하며 차별화된 구성을 보였던 반면, 지상파는 경제, 생활 정보 뉴스 등에 대해 주요 뉴스로 처리하며 차이를 나타내었다. 종편 개국 초기 4년간 방송 뉴스 전반의 다양성을 분석한 결과 종편은 지상파와 유사한 뉴스를 제공하는 전략으로 시장에 진입했으나 다양한 뉴스를 제공하는 지상파와 경쟁하기 위해 선택과 집중의 전략을 취하는 방향으로 변화했음을 확인하였다. 종편 개국 초기 방송 뉴스 시장에서 지상파는 다양성 전략을 유지하는 전략을 편 반면, 종편은 집중 전략을 활용했음을 확인할 수 있었다.

• 지식경영연구
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• 제18권3호
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• pp.101-124
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• 2017

Recently, 'happiness' has become a major issue of national level, exceeding the matter of personal issue. Especially, Korea has actually increased its GDP by focusing on the economic growth for decades, and now it has achieved the economic/technical development as an IT power. However, Korean people's satisfaction with life called 'happiness index' is moving back every year. Even though there have been continuous efforts to enhance the national happiness by mentioning it as an essential issue in the national level, there are not many researches related to it. This study drew measures to enhance happiness by extracting happiness factors and unhappiness factors of Korea through social network service. Especially, it aims to analyze, compare, and apply happiness factors and unhappiness factors of three countries such as the US, UK, and Brazil with higher happiness indexes than Korea. For this, through the topic modeling of text mining technique, postings including keywords about happiness and unhappiness were collected/analyzed from Twitter of Korea, the US, UK, and Brazil. The significance of this study is to discuss measures to increase happiness and to decrease unhappiness by mining/analyzing the actual public opinions about happiness and unhappiness in four countries like Korea, the US, UK, and Brazil by using the topic modeling. Through this, the quality of life of Korean people could be improved by suggesting measures to enhance happiness and to decrease unhappiness in the level of individual, family, society, and government.

• 한국도서관정보학회지
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• 제29권
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• pp.65-103
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• 1998

This study aims to examine both the theoretical framework and practical method for the building a subject-oriented collection of information resources form Internet. Through the study, a few conclusions as well as a suggestion were derived. 1. Conclusions : (1) The continuous learning and studying by the librarians working in the information society is required in order that they could have a broader recognition of the existence of various resources from Internet by subject, and that they could be armed with a greater ability to evaluate for the information filtering. (2) The use of a subject directory to collect needed information resources form Internet revealed the necessity for going through many steps linked by hierarchical indexes till arriving at the desired information, and accordingly the great time was needed to conduct the work. (3) In case of using various search engines, since the output of the relevant information largely depends on the adequate defining of the topic, the right selection of search terms and the accurate methods of inputting the keywords, systematic organization of the resources is not simple and easy. The classifying work of collected resources for the topic into the broader categories differs from that of the resources form other topics, for example, psychology, because of the idiosyncrasy of the contents of the each topic. (4) As one method to provide more revolutionary value-added service using Internet, it is necessary for the librarians to learn the skills to build the Web resource pages of subject-oriented collection of information resources from Internet on the specific subject. 2. A suggestion : Since the study did not complete the collection and organization of the information resources from the Internet on this topic, the remaining research and task should be the thorough collection of resources and the building the Web resource pages consisting of interconnecting links of indexes by spending greater time.

• 대한지구과학교육학회지
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• 제6권1호
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• pp.69-77
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• 2013

The study aims to figure out pre-service elementary teachers' knowledge understanding on 'stratum and rock' as well as teaching-learning types on the same topic. A total of 65 seniors in an advanced science education course at B University of Education joined the research to fulfill the purpose above. With PCK classification framework, the study examined pre-service teachers' knowledge understanding on 'stratum and rock' while it analyzed how the teachers would teach the given topic to students. The results of the study are presented as follows. First, it was observed that the pre-service elementary teachers have a great understanding on 'stratum and rock' that would be taught via a science textbook for elementary fourth graders. However, regarding terms in 'shale and limestone', they appeared to have a relatively short understanding. Second, PCK elements of the pre-service teachers related to 'stratum and rock' were analyzed and according to the results, the teachers would be interested in teaching model selecting in the teaching-learning strategy field while they would be well aware of how important it is for them to perform an experiment in a teaching process. The teachers also appeared to understand that the teacher question can be mutual complementary during class. However, it turned out that the teachers would have a very much low understanding on learners' prior knowledge as they particularly believe that learning could be significantly affected by the learners' perception level as well as their learning interest and motive. Third, the pre-service elementary teachers were told to design teaching plans on 'stratum and rock' so that the study could find out what learning-teaching methods the teachers would adopt to teach the topic. It was learned that the teachers would proceed with the class basically by giving the learners a descriptive explanation on the topic and also by using pictures and drawings to enhance the learners' understanding during the class.

• 디지털콘텐츠학회 논문지
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• 제19권1호
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• pp.51-58
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• 2018

SNS의 사용자와 데이터량이 폭발적으로 증가함에 따라, SNS 빅 데이터를 기반으로 한 연구들이 활발히 진행되고 있다. 특히 소셜 마이닝 분야에서는 비 분류된 대용량 SNS 텍스트 데이터로부터 각 텍스트 별 유사성을 파악하고, 그로부터 트렌드를 추출하기 위해 대표적인 토픽 모델 기법인 LDA를 사용한다. 그러나 LDA는 단문 데이터에 대하여 비 빈발 단어 출현으로 인한 의미 희박성(semantic sparsity)으로 인해 양질의 주제 추론이 어렵다는 한계를 가진다. BTM 연구는 이와 같은 LDA의 한계점을 두 단어의 조합을 통해 개선하였으나, BTM 또한 조합된 단어 중 높은 빈도수의 단어에 더 큰 영향을 받아 각 주제와의 연관성을 고려한 가중치 계산이 불가능하다는 한계점을 지닌다. 본 논문은 단어 간의 의미적 연관성을 반영함으로써 기존 연구 BTM의 정확도를 개선하는 방안을 모색한다.

• 한국조리학회지
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• 제17권1호
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• pp.110-123
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• 2011

본 연구의 목적은 두 가지이다. 첫째, 회원의식과 관계된 회원행동을 살펴봄으로써 외식 커뮤니티가 어떻게 회원들에게 영향력을 행사하고 가치를 창조하는지 알아보고 둘째, 회원의식과 회원행동의 관계가 회원들의 주제관여도 수준에 따라 어떻게 달라지는지 그 조절효과를 알아보는 것이다. 회원행동은 구매 관련 행동과 그룹 관련 행동으로 나누어 조사되었고 회원의식이 그 선행변수로서 제시되었는데 회원의식이 구매와 그룹 관련 회원행동, 모두에 유의적 영향을 미치는 것으로 나타났다. 또한 외식 주제에 대한 개인 회원의 관여도 수준이 회원의식과 회원행동 간의 관계를 조절하는 것으로 나타났는데 관여의 수준이 낮은 회원들에 비해, 관여의 수준이 높은 회원들이 커뮤니티에 애착심을 가짐으로 더 높은 수준의 구매 및 그룹 관련 행동을 보이는 것으로 나타났다.

• The Korean Journal of Pain
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• 제34권1호
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• pp.82-93
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• 2021

Background: This study used bibliometric analysis of articles published about the topic of regional anesthesia from 1980-2019 with the aim of determining which countries, organizations, and authors were effective, engaged in international cooperation, and had the most cited articles and journals. Methods: All articles published from 1980-2019 included in the Web of Science database and found using the keywords regional anesthesia/anaesthesia, spinal anesthesia/anaesthesia, epidural anesthesia/anaesthesia, neuraxial anesthesia/anaesthesia, combined spinal-epidural, and peripheral nerve block in the title section had bibliometric analysis performed. Correlations between the number of publications from a country with gross domestic product (GDP), gross domestic product (at purchasing power parity) per capita (GDP PPP), and human development index (HDI) values were investigated with the Spearman correlation coefficient. The number of articles that will be published in the future was estimated with linear regression analysis. Results: Literature screening found 11,156 publications. Of these publications, 6,452 were articles. The top 4 countries producing articles were United States of America (n = 1,583), Germany (585), United Kingdom (510), and Turkey (386). There was a significant positive correlation found between the GDP, GDP PPP, and HDI markers for global countries with publication productivity (r = 0.644, P < 0.001; r = 0.623, P < 0.001, r = 0.542, P < 0.001). The most productive organizations were Harvard University and the University of Toronto. Conclusions: This comprehensive study presenting a holistic summary and evaluation of 6,452 articles about this topic may direct anesthesiologists, doctors, academics, and students interested in this topic.

• 한국정보시스템학회지:정보시스템연구
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• 제30권4호
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• pp.277-301
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• 2021

Purpose The purpose of this study is to analyze the sentiment responses of the general public to non-face-to-face work using text mining methodology. As the number of non-face-to-face complaints is increasing over time, it is difficult to review and analyze in traditional methods such as surveys, and there is a limit to reflect real-time issues. Approach This study has proposed a method of the research model, first by collecting and cleansing the data related to non-face-to-face work among tweets posted on Twitter. Second, topics and keywords are extracted from tweets using LDA(Latent Dirichlet Allocation), a topic modeling technique, and changes for each section are analyzed through DTM(Dynamic Topic Modeling). Third, the complaints of non-face-to-face work are analyzed through the classification of positive and negative polarity in the COVID-19 section. Findings As a result of analyzing 1.54 million tweets related to non-face-to-face work, the number of IDs using non-face-to-face work-related words increased 7.2 times and the number of tweets increased 4.8 times after COVID-19. The top frequently used words related to non-face-to-face work appeared in the order of remote jobs, cybersecurity, technical jobs, productivity, and software. The words that have increased after the COVID-19 were concerned about lockdown and dismissal, and business transformation and also mentioned as to secure business continuity and virtual workplace. New Normal was newly mentioned as a new standard. Negative opinions found to be increased in the early stages of COVID-19 from 34% to 43%, and then stabilized again to 36% through non-face-to-face work sentiment analysis. The complaints were, policies such as strengthening cybersecurity, activating communication to improve work productivity, and diversifying work spaces.