• KDI Journal of Economic Policy
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• v.32 no.4
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• pp.75-114
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• 2010

This paper examines empirically whether information and communication technology(ICT) has improved total factor productivity at industry level in Korea, considering time lag between ICT capital accumulation and improvement of productivity. To evaluate if ICT is pervasive enough to raise productivity, ICT capital stock of Korea is compared with those of advanced economies. From the perspective of aggregate economy, the ICT capital in Korea has increased fast since the mid-1990s and became comparable with advanced economies. However it is mostly attributed to rapid growth of ICT-producing industries. In other industries, ICT capital are still less accumulated than advanced economies. Growth accounting results exhibit that the productivity has risen faster since 2000 in industries using ICT intensively, but looking into specific industries, it is not likely for ICT to be the main factor of productivity improvement except in business service industry. Regression results provide some evidence that ICT is useful in raising productivity only after considerable amount of time allowed. To fully exploit the positive effect of ICT on productivity, it may be necessary for the Korean economy to create institutional environment facilitating complementary innovations as well as ICT captial accumulation.

• The Journal of Information Technology
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• v.5 no.1
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• pp.157-171
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• 2002

The evolution of transaction-based business model is upon us. The business models of many e-Marketplace in their early stages have typically been based on transaction fees. Many e-Marketplaces have even called out transaction revenues as a core element of their business plans. The transaction business represents the most simple of business models, but it does not provide a long-term sustain able advantage. For buyer's convenience, wide selection and test price hold appeal. For suppliers, the extended global market reach and direct access to customers and consortiums of customers is powerful. To maxmize leverage of these new e-marketplace, you must from both a buyer perspective as well as a supplier perspective. Also required is a strategy that takes in account all of the various e-Marketplace transaction standards and one that allows the easy accomodation to new e-marketplace as the market change. These new e-marketplace will need to be factored into the sales channel strategies. To be successful, integration with these e-marketplaces should occur at a complete business process level. This study explored independent and industry-backed current and future business models that are emerging in the B2B electronic market industry, as well as value -added service models for the Net market maker industry. E-Marketplaces will evolve into digital work environments in which real industry collaboration can occur.

• The Journal of Aerospace Industry
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• s.69
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• pp.1-27
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• 2007

항공우주산업은 생산유발효과가 높고 고용창출도 높을 뿐만 아니라 부가가치산업이나, 대규모적 투자에 따른 투자 위험과 기술적 위험이 높아 정부차원에서의 개입이 불가피한 산업으로 인식된다. 최근 항공우주산업에 대한 정부의 지원 형태는 클러스터 조성, 지방세 감면, 토지 임대를 통한 기업지원 등 과거에 비해 더욱 다양한 형태로 발전되고 있다. 이와 같은 정부지원 형태의 다양성은 기존의 전통적 방식에 의한 지원으로는 글로벌 경쟁이 치열해지는 국제경쟁에서 경쟁력 우위를 유지하기 어렵다는 것을 반증하는 것이라고 할 수 있다. 특히 기존의 산업 중심의 정부지원 전략에서 기업중심의 정부지원 전략으로의 선회 경향은 산업의 주체는 기업이기 때문에 기업의 전체적 역량에 의한 경쟁우위가 글로벌 경쟁에서 보다 중요하다는 점을 시사하고 있다. 경남의 항공우주산업 클러스터 조성 여건은 인프라 구축면에서 여타 지역에 비해 매우 우수한 하부 기반을 구축하고 있어 클러스터 구축에 따른 효율성과 국제경쟁력 확보 가능성이 높다고 할 수 있다. 먼저, 클러스터 구축의 핵심이 되는 핵심선도기업인 KAI가 15년 전부터 대상지역에서 생산활동 중이며, 교육 및 훈련 기능도 비교적 풍부할 뿐만 아니라 공항도 인접해 있어 신속한 물류 및 정보공유, 해외시장과의 접근성이 높다고 할 수 있다. 결론적으로 볼 때, 경남지역의 항공우주산업 클러스터 구축의 타당성은 높다고 할 수 있다. 특히 현재의 항공우주산업 발전 단계상으로 볼 때, 부품산업의 발전이 긴요한 과제이므로 동 클러스터는 항공우주 부품 수출중심의 핵심 거점 클러스터로의 조성할 필요성이 높다고 할 수 있다. 이와 같은 클러스터 조성에 따른 경남 항공우주 클러스터의 운영체계는 “항공우주산업 혁신 클러스터 추진단”을 중심으로 입주 업체, 항공우주 수출 지원단, 관련 R&D 기관 및 교육기관 등이 긴밀하게 연계 되어 운영되어야 할 것이다. 이외에도 중앙정부와의 협의 및 관련 단체들과의 연계를 통해 클러스터의 효율성과 경쟁력 제고를 위한 활동을 적극 추진해야 할 것이다.

• Fire Science and Engineering
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• v.21 no.2 s.66
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• pp.74-86
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• 2007

In order to analyze causes and results of job stress among fire fighters, the structural model was developed and reviewed by a survey asking questions about job stress, job commitment role confusion and relationships with co-workers to 961 fire fighters working in Seoul, Korea. Results of research are correspond with previous research results done in different working environment although fire lighters experienced much higher job stress than average public officers. According to research results, both' job character' and 'relationships with co-worker' influenced 'job stress' and 'job commitment' directly at a statistically significant level. 'Role confusion' influenced 'job stress' directly but influenced 'job commitment' indirectly through 'job stress'. Results of this research could be utilized for expressing necessity of building a job stress management system for fire fighters in Korea.

• The Journal of Information Technology
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• v.5 no.2
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• pp.95-106
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• 2002

This study attempts to construct and manage the distance learning system by focusing on education institutins. However, they lack not only web-based courseware for information literacy but also the contents for the management technology. This study tried to design and implement the web-based courseware by using OCP(Oracle Certified Profession) based on the initial Oracle in distance learning. Learners' individual variations were considered based on problem solving learning. Also, the practical contents that could be applied in the educational field were selected. The learning type web-based courseware, using the technology of ASP, DHTML, JAVAscript, VBA, was designed and implemented into the framework that could be updated easily. The result of the study shows: first of all, this courseware induced a greater understanding of the Oracle language and the student's interests. Secondly, the student's had more control over the process of individual learning and achieved the goal more effectively through immediate feedback, finally, the students could learn wherever they have on-line connections to the web server.

• Journal of Internet Computing and Services
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• v.20 no.4
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• pp.29-38
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• 2019

Currently, information society is rapidly changing and demands innovation and creativity in various fields. Therefore, the importance of mathematics, which can be the basis of creativity and logic, is emphasized. The purpose of this paper is to develop a math education application that can further expand the logical thinking of mathematics and allow voluntary learning to occur through the use of readily available teaching aid for children to form motivation and interest in learning. This paper provides math education applications using a smartphone and blocks for children. The main function of the application is to shoot with the camera and show the calculated values. When a child uses a block to make a formula and shoots a block using a camera, you can directly see the calculated value of your formula. The preprocessing process, text extraction, and character recognition of the photographed images have been implemented using OpenCV libraries and Tesseract-OCR libraries.

• Journal of Advanced Navigation Technology
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• v.23 no.4
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• pp.296-301
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• 2019

Artificial intelligence is closely linked to our real lives, leading innovation in various fields. Especially, as a means of transportation possessing artificial intelligence, autonomous unmanned vehicles are actively researched and are expected to be put into practical use soon. Autonomous cars and autonomous unmanned aerial vehicles are required to equip accurate navigation system so that they can find out their present position and move to their destination. At present, the navigation of transportation that we operate is mostly dependent on GPS. However, GPS is vulnerable to external intereference. In fact, since 2010, North Korea has jammed GPS several times, causing serious disruptions to mobile communications and aircraft operations. Therefore, in order to ensure safety in the operation of the autonomous unmanned vehicles and to prevent serious accidents caused by the intereference, rapid situation judgment and countermeasure are required. In this paper, based on big data and machine learning technology, we propose a countermeasure system for GPS interference that supports decision making by applying John Boyd's OODA loop cycle (detection - direction setting - determination - action).

• International Area Studies Review
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• v.13 no.2
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• pp.602-616
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• 2009

EU and NAFTA which are huge regional economic blocs came out the world economy at the end of the twentieth century. It is the first that Europe has been trying to establish regional economic integration which is a revolutionary change to world economy. So that regional economic integration of Europe(European Union) has been improving to make a complete economic political integration. This paper analyzes trade creation effect for joining European Union(EU) of Central Eastern European countries with random effect estimation and fixed effect estimation. 12 Central Eastern European countries have become membership states of EU since 2004 is able to get 27.4% of trade increase effect on average between old and new membership countries one another as well as between new membership countries one another respectively. It is very important for some countries have a plan to affiliate to EU in the future to realize such a big effect if they are in.

• Journal of The Korean Association of Information Education
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• v.24 no.6
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• pp.633-641
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• 2020

The development of intelligent information technology based on intelligence and data and network technology implemented by artificial intelligence has instigated innovation in society as a whole and has shown wide social and economic impact. Therefore, not only overseas but also in Korea, AI education is in a hurry to cultivate talents who will lead the upcoming society. Data is an important part of artificial intelligence, and data literacy, which can collect, process, and analyze data, to make data-based decisions, can be seen as an important competency to be developed along with AI literacy. Therefore, in this study, an AI data science education program that can increase data literacy of elementary school students was developed and applied to the experimental group, and its effectiveness was verified through a pre- and post response sample t-test. As a result, all of the four detailed competencies of data literacy, data understanding, collection, analysis, and expression, showed statistically significant improvement, indicating that the AI data science education program was effective in improving students' data literacy.

• Journal of Platform Technology
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• v.9 no.4
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• pp.90-96
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• 2021

Most of the vehicles currently under development and in operation are equipped with various IoT sensors, but some of the factors that cause car accidents are relatively difficult to detect. One of the major risk factors among these factors is black ice. Black ice is one of the factors most likely to cause major accidents, as it can affect all vehicles passing through areas covered with black ice. Therefore, black ice detection technique is essential to prevent major accidents. For this purpose, some studies have been carried out in the past, but unrealistic factors have been reflected in some parts, so research to supplement this is needed. In this paper, we tried to detect black ice by analyzing color images using the CNN technique, and we succeeded in detecting black ice to a certain level. However, there were differences from previous studies, and the reason was analyzed.