• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.10a
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• pp.870-870
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• 2013

운송수단은 시대별로 요구되는 성능과 기술 수준 그리고 사용 가능한 에너지의 형태에 따라서 변화되어 왔습니다. 1900년대 초 전기자동차의 고질적인 제한적 운행 거리 문제는 내연기관의 발명으로 인해서 쉽게 해결되었다. 이 후 내연기관의 급속한 보급과 도심 과밀화로 인해서 공해 문제가 대두되었는데, 공해 문제 역시 배기 가스 환원 촉매의 발달과 자동차 전자 제어 기술의 발달로 대부분 해결된 상태이다. 최근에는 사용 가능한 화석에너지의 절대량 측면에서 하나의 커다란 시대적 전환점에 서게 되었다. 즉 아직도 사용 가능한 석유의 절대적인 양적 측면에서는 적당한 공급이 이루어지고 있으나 그 가격 면에서는 급격한 상승이 이어지고 있으며 이는 석유의 채굴이 점점 어려워지고 있음에 기인한다. 에너지의 현황을 객관적으로 살펴 보기 위해서 자동차에 있어서 절대적인 오일을 중심으로 그리고 통계자료 위주로 문제를 분석해 본다. 그리고 수소 연료 전지와 전기자동차 등 여러 가지 대체 에너지 운송기술이 많이 거론되고 있으나 널리 대중화 되고 있지 못하는 근본적인 문제점들이 어디에 있는지 분석해 본다. 이어서 소위 대체 에너지들이 자동차에 있어서 석유의 대체 수단으로 적합하지 않다면 과연 에너지를 가장 많이 쓰는 영역중의 하나인 운송 분야의 현재와 미래의 나아갈 방향은 무엇인지 그 해법을 생각해 본다. 석유를 대체할 에너지의 공급 방안이 충분하지 않다면 마지막으로 생각할 수 있는 것은 에너지의 소비 측면이다. 다행히도 그간 소비 측면의 개선 방안이 많이 소홀하게 취급되어져 왔다. 즉 에너지의 효율을 향상시킬 수 있는 여력이 충분하고도 많이 있다는 희망적인 소식이다. 이에 따라 에너지 효율 향상에 유용하게 사용할 수 있는 다양한 제어 기술을 소개한다. 에너지와 운송수단의 문제를 거시적이고 동시에 현실적으로 바라볼 수 있는 안목을 갖게 되기를 기대한다.

• Journal of Space Technology and Applications
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• v.2 no.1
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• pp.13-29
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• 2022

Recently, the number of space objects around the Earth has increased rapidly, necessitating systematic space risk management. This paper proposes a dual-mode framework for assessing the risk of collision between space objects. The proposed framework consists of microscopic and macroscopic modes. The former focuses on one-to-one collision events, and the latter assesses the overall collision risk inside a cell located in space. Two risk assessment case studies using the proposed two modes demonstrate the effectiveness of the proposed framework.

• Journal of Korea Technology Innovation Society
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• v.13 no.2
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• pp.282-309
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• 2010

Recently, technology acquisition through technology trade plays a critical role in obtaining national competitiveness in a global era. However, current studies mostly focus on grasping the characteristics or macro status of technology trade and analyzing the impact of technology acquisition through the technology transaction, leading to the failure of providing a theoretical and practical background of national policy-making. Therefore, this research aims at investigating the concentration rate of technology, companies and countries where Korean companies obtain technological capability on the basis of the Bank of Korea's data related to 'loyalty payment in technology licensing', additionally analyzing the types of exported technology and loyalty payment. From these analyses, the degree of concentration that pre-defined 31 technology classifications depend on specific technologies, companies and nations are examined and the characteristics of technology trade types are investigated. The results of this research can be used to make a technology policy and analyze the characteristics of technology innovation of Korea industries.

• Spatial Information Research
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• v.14 no.3 s.38
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• pp.285-297
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• 2006

We aim to investigate the morphological and environmental characteristics of royal tombs of Chosun Dynasty by using GIS technique and remotely-sensed data. Most of the royal tombs are located on the banded gneiss and granite and over the south- and east. facing slopes and have altitudinal ranges of 150 to 200 meters. Due to the time gaps, exact locational preferences of the royal families can not be understood at this moment and also proximity to the running water is hard to be quantified. Close examination of Gwangneung indicates that the artificial modification and weathering have severe impacts on the slope and stone artefacts. The results from this research can be useful to preserve the valueless cultural heritages.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.4
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• pp.656-663
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• 2018

As the virtual reality technology, which has been attracting attention recently in the era of the fourth industrial revolution, is spreading and spreading throughout the society, expectation about virtual reality is gradually increasing. The major big companies such as Samsung and LG in Korea are concentrating on R &D and early ecosystem composition of virtual reality field as well as large global corporations such as Google and Facebook. But in Korea, the environment is not well equipped to compete with the global market and although there are many SMEs and start-up companies related to virtual reality, there are few successful companies. In this study, we analyze the domestic and foreign virtual reality market and industry and present ways of activation on virtual reality industry. We analysis by PEST analysis, SWAT and competitive structure analysis.Based on the analyzed results, ways to revitalize the virtual reality industry are suggested in this paper.

• The Journal of the Korea Contents Association
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• v.21 no.3
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• pp.430-440
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• 2021

We analyzed research trends of 288 Korean academic dissertations and articles regarding platform work, using topic modeling and keyword network analysis method. Research disciplines of many studies were laws, business administration, and economics fields. Thigh frequent themes were platform labor protection measures and direct or indirect effects of the sharing economy. The main keywords were digital, value, industry, and labor in terms of infrastructure and structural change. Besides, the main topics were the protection of platform workers, the values of sharing services, digital paradigm, and platform regulations. Based on the results of the analysis, we derived four implications and suggestions such as researching structural frames in macroscopic contexts, generalizing case analysis, and technology supplementation by applying average and quantitative analysis methods, researching individual competency development to realize the essential symbiotic value of sustainability, and developing customized vocational education and training programs.

• Journal of The Korean Association of Information Education
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• v.25 no.2
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• pp.347-354
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• 2021

As interest in artificial intelligence education for elementary school students has recently increased, it is necessary to analyze the existing elementary information education research from a macroscopic point of view to understand the current situation and to provide implications for subsequent research. This study analyzed Journal of The Korean Association of Information Education for the purpose of looking at the research trend of elementary information education in Korea. For the data of the study, all papers published until 2020 in the first issue of the journal were selected, and 11 research topics were derived by modeling topics. As a result of the study, topic T1, the highest proportion, was analyzed to account for about 38%, and keywords such as education, research, analysis, elementary school, and information were derived according to the order of contribution to topic T1. As a result of regression analysis according to the year of the topic, it was found that the research trend is changing to computing thinking, software education, and artificial intelligence education. The significance of this study is that text data related to elementary information education is objectively clustered.

• The Journal of the Korea Contents Association
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• v.22 no.2
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• pp.379-389
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• 2022

This study analyzed 10,352 married women to find the correlation between marital equality felt by married women and additional childbirth intentions. Frequency analysis and chi-square test analysis were performed to analyze the general characteristics of the investigator, and studies were conducted through binary logistic regression analysis and interaction analysis to analyze the relevance between each variable and additional childbirth. As a result, the 4-point group based on the 0-point group that lowest marital equality had 2.01 times higher willingness to additional birth. And, the 3-point group and the 2-point group were 1.46 times and 1.41 times higher than 0-point group with marital equality and additional childbirth intentions. In addition, intention of additional childbirth was increased when the higher the number of children, if they own a house, and if wives are non-regular or unemployed. This study analyzed the relationship between married women's intention to give birth additionally, focusing on marital equality. It is suggested that specific and reasonable policies at the macro level are required to improve the fertility rate.

• Smart Media Journal
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• v.13 no.2
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• pp.108-121
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• 2024

In the IT industry, the complexity and volatility of corporate networks are gradually evolving, and concurrently, the significance of corporate networks is increasing. Previous research has employed network analysis to scrutinize inter-corporate trade relationships for strategic and policy making. However, previous studies focused on the overall network structure from a macroscopic perspective, presenting limitations in applicability at the individual IT corporation level. This study develops a novel research model incorporating sector and region-level network analysis based on connection strength, along with the derivation of a composite node centrality indicator. Using this methodology, we analyzed corporate networks across nine metropolitan areas using IT corporate transaction data. The results means that cities with a manufacturing base, such as Incheon, Busan, and Daegu, have recently established cooperative networks with IT companies. We also found that in the IT industry in Gwangju and Daejeon, certain companies dominate the transaction network.

• Journal of Technology Innovation
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• v.22 no.4
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• pp.117-143
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• 2014

Tracing an evolutionary technological trajectory in the macroscopic viewpoint is useful for technology policy, but not for corporate technology and intellectual property strategy. Tackling this issue, recent bibliometric studies using patents and papers have made efforts to identify more specific and detailed technological trajectory. However, these studies cannot go beyond simple description of the past trajectory. Also, identification of technology fusion and evolution relies on experts judgments. We suggest a way of identifying microscopic evolutionary technological trajectories by combining patent citation network analysis with dynamic technology tree. Also, using new indicators of generality, diversity and novelty, we can detect key technologies that can be a starting point of next generation technology and derivative technology. HVDC(High Voltage DC transmission) system technology is exemplified.