• Journal of the Korean Society for Aviation and Aeronautics
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• v.25 no.4
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• pp.187-194
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• 2017

ICAO Universal Safety Oversight Audit Programme is a comprehensive evaluation for aviation safety matters, including aircraft operation, licensing and aircraft incident/accident investigation. As this programme is measures aviation safety level of States, there is a need to meet international standards, especially in the field of aircraft incident/accident investigation. This research discusses points required to satisfy international standards, which are independence and autonomy of an accident investigation board, the lack of the enough number of investigators and efficient management of those personnel, the effective composition and use of an investigation report, an accident investigation itself to build big data and the creation of a cooperation system among States. This paper suggests various opinions in order to enhance aviation safety especially through aircraft accident investigations, using case studies from the US, UK and Japan.

• Korean Journal of Veterinary Research
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• v.59 no.4
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• pp.227-230
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• 2019

This study describes a sudden death in an ostrich (Struthio camelus) with a big neck. Grossly, the air sacs were thickened. Yellow to white, round or coalescent material was scattered on the air sacs. However, the cervical air sac was normal. Histopathologically, multinucleated giant cells, heterophils, and macrophages had infiltrated the air sacs, and many hyphae were seen in the air sacs and on their surfaces. Pyogranulomatous inflammation with intralesional hyphae was observed throughout the lungs. Aspergillus fumigatus was identified microbiologically. In conclusion, the affected animal died because of the respiratory disturbance caused by mycotic airsacculitis and pneumonia.

• Journal of the Korean Society of Safety
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• v.18 no.1
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• pp.76-80
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• 2003

There will be a big problem in disposing of waste tie coming from the cars. Because many of these have been thrown away to the field and environmentally polluted. New, We need to find out how to dispose or recycle these waste material. It is thought that recycling this material especially mixing with concrete will be a good idea. This study is focused how each material do its behavior due to the size of waste type particle and its amount into concrete material. 0.4mm-10mm range of particle has been applied to the material : Also, 1.0%, 1.5%, 2.0% range of tyre particle proportion has been applied to make cylinder molds. The concrete mold with waste-tyre particle has vibration-absorbing ability. It is found that 0.4 -0.6mm particle mixing concrete has been more solid organized. And this waste tyre material could be applied to the general concrete, it is found.

• International Journal of Contents
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• v.6 no.4
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• pp.101-107
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• 2010

I aim to discover that how greatly the curriculum of Life Dance department has had an effect on the career of students majoring in dance, with research objects being Life Dance department of two universities, located on the metropolitan area. The study method, called qualitative, includes some suggestions on the curriculum of the two and comparison, analysis of job-related materials; further, it involves discussion on the influence the curriculum has had on the career as dance trainers. The results from it are as follows; first, the curriculum of the department mostly consists of pure art such as Korean dance, modern dance, ballet, but has few creative life dance programs. Second, the employment into the art area has been more often than to the counterpart. Finally, it shows that a title of a department does not make a big difference and affect the employment rate. In conclusion, as the completion of the curriculum does not always guarantee a success, it is recommended that college students get some competent certificates related to dance.

• Knowledge Management Research
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• v.18 no.4
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• pp.97-118
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• 2017

Thanks to the development of social media, general users become information and knowledge providers. But customers also feel difficulty to decide their purchases due to numerous information. Although recommender systems are trying to solve these information/knowledge overload problem, it may be asked whether they can honestly reflect customers' preferences. Especially, customers in book market consider contents of a book, recency, and price when they make a purchase. Therefore, in this study, we propose a methodology which can reflect these characteristics based on topic modeling and provide proper recommendations to customers in book market. Through experiments, our methodology shows higher performance than traditional collaborative filtering systems. Therefore, we expect that our book recommender system contributes the development of recommender systems studies and positively affect the customer satisfaction and management.

• Korean Management Science Review
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• v.31 no.4
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• pp.107-116
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• 2014

Recently, various types of information and communication technology (ICT) such as cloud computing, big data, and virtual reality have been progressed in the world. Also, it is expected that there are many domestic and foreign visitors in Gangwon-do due to the Pyeongchang winter olympic games in 2018. In this environment, it is necessary to improve the competitiveness of Gangwon-do in winter sports areas exploiting both existing IT infrastructure and application technologies. In this paper, for sustainable development of Gangwon-do winter sports IT industry after the Olympics, we propose efficient implementation methods of 3 winter sports IT convergence services and Gangwon-do ICT activation strategy. The proposed 3 winter sports IT service areas are as follows. 1) Realistic winter sports IT service, 2) Winter sports medical IT service 3) Winter sports record analysis IT service.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.407-410
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• 1999

Viterbi decoder is implemented with a Radix-4 architecture at 0.5$\mu\textrm{m}$ process even though the delay time of standard tell is big and it causes a bigger chip size. As process develops, the delay time of standard cells is getting smaller. Therefore, the requirement of speed and chip size is satisfied by using Radix-2 algorithm to implement Viterbi decoder.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.136-137
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• 2017

4차 산업혁명시대가 도래함에 따라 해운항만기업에서 4차 산업혁명을 주도하는 ICT를 활용하기 위한 노력이 다양하게 전개되고 있다. 특히 해운항만물류분야에서는 IoT센서가 만들어내는 다양한 데이터를 분석하여 도출된 인사이트를 기반으로 업무효율성을 높이고자 빅데이터분석 기법을 적용하기 시작하고 있다. 본 연구에서는 해운항만기업들 중 빅데이터분석을 도입해서 활용하고 있거나, 빅데이터를 업무에 활용하기 위해 도입의도를 가지고 있는 기업의 종사자들을 대상으로 어떤 요인들이 빅데이터 사용의도를 높여주는 지에 대하여 실증분석.

• Korean Journal of Materials Research
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• v.13 no.5
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• pp.303-308
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• 2003

Amorphous carbon nitride films deposited on Si(001) substrates by a plasma enhanced chemical vapor deposition (PECVD) technique using CH$_4$and $N_2$as reaction gases were thermally annealed at various temperatures under$ N_2$atmosphere, then their physical properties were investigated particularly as a function of annealing temperature. Above $600^{\circ}C$ a small amount of crystalline $\beta$-$C_3$$N_4$ phase evolves, while the film surface becomes very rough due to agglomeration of fine grains on the surface. As the annealing temperature increases, both the hardness and the $sp^3$ bonding nature are enhanced. In contrast to our expectation, higher annealing temperature results in a relatively higher friction mainly due to big increase in roughness at that temperature.

• Electronics and Telecommunications Trends
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• v.33 no.4
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• pp.92-102
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• 2018

On a global level, the energy problem is a very important policy topic, particularly at a time when the nation relies on imports for more than 95% of its energy demand. The starting point of an energy policy should be in line with the international community's concern and cooperation regarding climate warming, and the logic of the new policy on renewable energy expansion in Korea, the pre-developed energy sector, and policy of deserting coal all support this aspect. In particular, to accommodate the rapid urbanization of mankind, the key words of the 4th Industrial Revolution are linking energy to IoT, artificial intelligence, block chain, cloud, and big data.