• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.4
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• pp.793-801
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• 2000

This paper presents the effect of lightning impulse current on ZnO varistors(390[V], 6.5[kA]) used in low-voltage AC mains as a protective device against transient overvoltages. The electrical characteristics of ZnO varistors are deteriorated by overtime impulse current, and a deteriorated ZnO varistor is brought to a thermal runaway and finally destroyed even in normal operating voltage. Therefore, it is important to estimate the changes of the electrical characteristics of ZnO varistors. A lightning impulse current standardized in IEC 61000-4-5 is applied to the varistors to accelerate deterioration, and the energy applied to the varistor at each time is about 12 [J]. In the experiment, various parameters such as leakage current, reference voltage are measured with the number of applied impulse current. Also, micro-structure changes of the varistors after applying the lightning impulse current of 200 times are compared. The electrical characteristics of the varistors are degraded by overtime impulse current, showing increase in leakage current and decrease in reference voltage.

• Journal of the Korea Convergence Society
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• v.10 no.4
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• pp.203-208
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• 2019

The purpose of this study was to review and analyze the history and present of the deaf baseball of Korea and U.S. This study used text analysis method that applies comprehensive analysis of the research paper, newspaper, publications and the data from related associations. This study found followings. First, youth baseball teams need to be vitalized. Second, to maximize the motivation and sense of accomplishment, various tournaments need to be hosted and the support for participating in international tournament is necessary. Third, the interchange between deaf baseball and softball is needed. Fourth, the integration of deaf sport and non-disabled sport is necessary. The results of this study might be used for further researches on deaf baseball.

• Journal of Practical Engineering Education
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• v.9 no.2
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• pp.183-190
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• 2017

Amid concentrating on inviting foreign students in the aspect of securing talents as well as advanced educational service industry in the world, the number of foreign students in Korea exceeded over 90,000 in 2015, increased to 104,262 anticipating further increase according to National Statistical Office. The government tried to expand the dormitory supply to the foreign students upon the discretion that short of the basic infrastructure in the universities such as quantitative shortage and facilities of the dormitories limited to lure the foreign students, despite the will of inviting more foreign students by the government, however, the rate of foreign students' staying in the dormitories was low with 36.0% nationwide in 2016, reflecting the difficulties of residence for the foreign students in Metropolitan areas. Hence, this study is to suggest the alternative potential as the cooperative housing for the foreign students with the expanded concept and its foundation methods, upon reviewing the concept and trend of the common dormitory such as universities-cooperative housing with the initiative of public institutions and the common dormitories for the Korean students studying in Seoul, and analyzing the university city of Paris and Tokyo International Exchange Center that are the examples of existing cooperative housing in overseas.

• Journal of the Semiconductor & Display Technology
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• v.18 no.1
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• pp.129-135
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• 2019

4M D램 공동연구 개발사업(1986.10~89.03)은 당시 미 일의 강력한 기술보호주의를 극복하기 위한 자구책으로 시작되었다. 국내 반도체업계는 선진국의 높은 기술장벽 및 기술보호주의를 극복하고, 강력한 경쟁력확보 및 기술축적을 위해 정부에 건의하였다. 이에 정부는 적극적인 자금지원을 통해 4M D램 개발 및 주변기술 개발을 목표로 초고집적반도체기술공동개발사업을 수행하게 되었다. 본 공동R&D사업은 ETRI의 주관으로 당시 금성반도체, 삼성전자, 현대전자산업 등의 반도체 업체와 학계가 참여하였고, 1986년 10월부터 1989년 3월까지 3단계에 걸쳐 수행되었다. 공동연구의 목적은 설계, 공정, 조립, 검사 등 4M D램 제조와 관련되는 기본기술개발과 함께 $0.8{\mu}m$ 선폭의 4M D램을 개발하는 것이며, 이를 위해 단계별 목표를 설정하고 관민연의 혼연일치로 추진되었다. 1차년에는 중요 핵심기술개발, 2차년에는 $0.8{\mu}m$ 4M D램 Working-die개발, 3차년에는 수율 20%의 $0.8{\mu}m$ 4M D램 양산시 제품을 목표대로 완료하였다. 각 연구단계별로 주요 핵심기술에 대한 연구평가가 실시되었으며, 관련기술에 대한 중복투자 방지를 위해 2차년도부터 분담연구가 수행되었고, 상호 기술공유를 위한 기술교류회가 활발히 이루어졌다. 또한 R&D수행을 통해 4M D램 Working-die를 2차년도 중반에 개발완료하였으며, 3차년도에는 4M D램의 20% 수율확보와 공정기술의 최적화 및 DB 구축을 수행했다. 공동R&D 방식에서도 기업간 경쟁체제 도입에 입각하여 동기유발 형태로 진행되었다. 정부는 자금적 지원으로 기업간의 경쟁 심리를 자극하는 전략을 추진했다. 선두기업인 삼성에게는 선행적 개발 지위에 비례하여 더 많은 지원을 부여하는 대신에, 삼성의 기술성과를 다른 기업에게로 확산시킴으로써 반도체 3사 전체의 기술능력을 향상시키는 전략을 추진했다. 본 사업이 성공적으로 수행되어 반도체 제품의 세계시장 점유율제고, 국제수지 개선, 반도체 핵심기술 조기확보뿐만 아니라 16M D램급 이상 차세대 반도체기술 개발의 교도보가 되었다.

• The Journal of the Convergence on Culture Technology
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• v.8 no.1
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• pp.299-306
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• 2022

Today, the paradigm of lifelong education has changed, emphasizing the role of universities as a lifelong educational institution. Re-opening a new horizon as a lifelong education institution that is not only centered on leisure education in the hierarchy where lifelong education can be afforded as before, or simply in line with changes in the social environment and the lengthened life cycle of the aging era. Let's propose a structured figure. Universities now have to create a virtuous circle structure that coexists not only with the role of the university itself, but with constant interaction with the local community. Adult learners, in particular, play a strong role in the development of their communities, so they are educated at the university to grow further and create structures that can return talent to the communities that go out into society. I should go. In the future, the university will actively open its doors to adult learners, position the university at the center of lifelong education, and in order to contribute to the development of the community, it will have to interact and cooperate with the community.

• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.384-399
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• 2021

This study aims to identify the characteristics and meanings that Korean musical enthusiasts take on as cultural intermediaries of musical content by analyzing the real-time conversations they have while watching musicals performed in online spaces. To this end, the 'Live TALK' chat during the 'ontact' (online contact) performance of the musical Marie Curie was observed in real-time and subsequently analyzed in terms of the characteristics of online cultural intermediaries: their owned capital, their mediating language, and their relationship with the consumers. As a result of the analysis, musical enthusiasts were found to possess a wealth of cultural capital based on practical experience and inquiry, and to be utilizing specific identifying expressions in their language use. In addition, they appeared to be interactive in their communication with the general audience, which could be seen in the flow of spontaneous conversations as well as questions and answers occurring in the live chat. This study is significant in confirming that musical enthusiasts are positioning themselves as new cultural intermediaries through their cultural practices: taking on the role of guides and mediators in the online space 'Live TALK.'

• Journal of Conservation Science
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• v.37 no.6
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• pp.659-669
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• 2021

In this study, vegetation index, the vegetation index calculated based on hyperspectral images was used to monitor Petroglyphs of Cheonjeon-ri, Ulju from 2014 to 2020. To select suitable the vegetation index for monitoring, indoor analysis was performed, and considering the sensitivity to biocontamination, Normalized Difference Vegetation Index (NDVI) and Triangular Vegetation Index (TVI) were selected. As a result of monitoring using the selected vegetation index, NDVI increased from 2014 to 2018 and then decreased in 2020, after preservation treatment. On the other hand, TVI was difficult to confirm the tendency during the monitoring. This difference was due to the variation in spectral reflectance according to the photographing conditions by year. Therefore NDVI is less sensitive to spectral reflectance deviation than TVI, so it can be used for monitoring. In order for TVI to be used, however, in-depth study is needed.

• Journal of the Korea Convergence Society
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• v.13 no.2
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• pp.103-113
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• 2022

The purpose of this study is to investigate the career awareness of Korean university students and Vietnamese university students majoring in health care and provide base data about career education. To this end, a survey was conducted on Korean university students and Vietnamese university students majoring in health care from February 1, 2020 to February 20, 2020, and the 200 copies of valid survey questionnaires were analyzed with SPSS 20.0. The study findings are as follows. First, there are significant differences in career awareness between the two countries. Second, in the verification of career awareness differences depending on the nationality, Korean university students were 'certain about their career direction' and 'had a firm will about their career' while Vietnamese university students 'put off or remained idle about their career concerns' and 'were strongly influenced by the advice from the people around them.' Based on the study findings, it was identified that a convergence career education program that reflects on cultural diversity should be opened and applied in international exchange programs so that university students can prepare for their careers effectively.

• The Journal of the Convergence on Culture Technology
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• v.8 no.5
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• pp.103-110
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• 2022

This paper attempted to systematize the settlement problem of Moroccan immigrants and the plan for Moroccan cooperation for various purposes by understanding Morocco's religious background and historical and cultural characteristics. Morocco is open to trade and typical in the social and cultural distance. It has been exchanging Western European culture, including Spain and France, but maintains a typical Muslim. In particular, Morocco was once a center of triangular trade, a diaspora and logistics hub, and advanced to North America. It will continue to serve as a bridgehead for the cultural spread of global square-traded. Now, Moroccan trade is formed around France and other European regions. This is encountered in Korea and other countries around the world due to the progress of opening and industrialization in the African region. Since COVID-19, soft power has been increasing women's accessibility. As a global triangular strategic location for business or service financing and regional access to Morocco, we demonstrate the local acceptance of cultural industries and services, the soft power of Korea.

• The Journal of the Convergence on Culture Technology
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• v.8 no.3
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• pp.515-520
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• 2022

Metaverse is at the center of heated debates in many areas recently. Coupled with real world, metaverse is extending its domain into social and cultural activities in addition to economic value creation as untact activities increase. Global companies are investing in R&D for metaverse. The reason is that metaverse is supposed to create new value by converging virtual and real worlds thanks to technology advancement such as AI, big data, 3D graphic, 5G, cloud computing, etc. Thus, innovative changes are expected in the economic, social and cultural areas. However, there are many problems to be solved yet for connecting virtual world and real one. Also, epoch-making development of products and services should be done for realistic experience and profit creation using virtual space in various industries beyond untact social activities against pandemic situation. The essence, present condition, development and its application areas of metaverse will be analyzed, and expected problems researched so that the strategy and methodology for securing global competitiveness will be addressed in coming metaverse era.