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NACA 0015 익형에 대한 Gurney 플랩의 영향
유능수,이장호 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.B
A numerical investigation was performed to determine the effect of the Gurney flap on NACA 0015 airfoil. A Navier-Stokes code. FLUENT, was used to calculate the flow field about the airfoil. The fully-turbulent results were obtained using the standard κ-ε two-equation turbulence model. The numerical solutions showed the Gurney flap increased both lift and drag. These results suggested that the Gurney flap served to increase the effective camber of the airfoil. Gurney flap provided a significant increase in lift-to-drag ratio relatively at low angle of attack and for high lift coefficient. It turned out that 0.75% chord size of flap was best. The numerical results exhibited detailed flow structures at the trailing edge and provided a possible explanation for the increased aerodynamic performance.
동아시아 무역네트워크의 발전에 따른 스미트로닉스의 SCM 구축에 관한 사례연구
박철주(Park, Chul Ju),한능호(Han, Neung Ho) 韓國貿易商務學會 2010 貿易商務硏究 Vol.47 No.-
Neung Ho International trade environment is rapidly changing. Developing all economic activities included in the value chain of economy out of a particular country or region in the trends where globalization is spreading all over the world, 'a borderless world' has been created and become common throughout the world. Especially, in case of East Asian region, becoming the factory of the world, China has become a center of the world's economic activities in recent years; and the increase of regional investment among East Asian countries and trade expansion focused on China has been the factor of promoting the formulation of a regional trade network. SCM is an efficient way of adaptation to the complexity or uncertainty on the scene through the achievement of a sustainable competitive advantage by integrating the activities of improving the relationships in the supply chain. In this study, Sumitronics, a Japanese company, was studied as a case of the company who had implemented SCM effectively and efficiently utilizing the East Asian trade network. Not being engaged in the manufacturing processes in the headquarter, Sumitronics has implemented SCM which is capable of maximizing the responsiveness upon the requirements of customers by effective information sharing. In particular, the profits of the company have been maximized through SCM by its headquarter in Japan, which is capable of managing each base in East Asia as China and Southeast Asia, etc. Korean companies may also be able to create a new source of profit by dint of establishing SCM as such. The results of this case study has revealed that the implementation of an effective business model is the key of the successful implementation of SCM.
A first record of Gaphara conspersa (Matsumura, 1931)(Lepidoptera, Tineidae) in Korea
Neung-Ho Ahn,Yang-Seop Bae,Euiyoung Kang 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.04
A tineid moth, Gaphara conspersa (Matsumura, 1931) is newly reported in Korea. Gaphara conspersa is myrmecophilous, associated with some species of ants such as Lasius (Lasius) japonicus, L. (Dendrolasius) spp., Polyrhachis spp., Camponotus spp., Pristomyrmex punctatus was known in Japan. The larva lives in a 8-shaped or gourd-shaped flat case are made of soil and sand. Larva scavenges food, dead ants and shed skins of ant larvae that are carried out by ants. Females lays eggs around the nests (Maruyama et al., 2013). In this study, Gaphara conspersa (Matsumura, 1931) was found for the first time from Korea. The larvae were collected in the ant nests at Mt. Cheonggye, Geumto-dong, Seongnam City, in 22. May 2013 and 16. June 2013. The larval cases have three level sizes (small, middle and large) were found at the same time. Figures of the adults, larvae and pupae, are given in this study.
Neung-Ho Ahn 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05
Mine and gall makers among Lepidoptera are found in the family Gracillariidae. The genus Borboryctis Kumata et Kuroko, 1988, have 2 species B. euryae Kumata et Kuroko and B. triplaca (Mayrick). B. euryae is known a gall maker of Eurya spp. In this study, Borboryctis euryae Kumata et Kuroko, 1988 feeding on Eurya japonica Thunb. and E. emarginata Makino (Theaceae), is reported for the first time from Is. Jeju and Geoje, Korea. The host plant, Eurya spp. an evergreen tree, is widely distributed in East Asia including Korea. The early instar larva makes linear mine near the surface of the leaves and mature larva makes gall on the leaves of the host plant. Larval frass ejected behaviour were not observed. The mature larva makes a light brown spindle-shape cocoon on the somewhere of the host plant, mainly edge of the leaf. The descriptions and figures of the male and female genitalia, mine, gall, larvae and pupae in immature stages, are provided.
한능호(Neung-Ho Han),김민재(Min-Jae Kim) 한국해양비즈니스학회 2020 해양비즈니스 Vol.- No.47
Due to rapid globalization and expansion in global trade volume greenhouse gas derived from shipping has been radically increased, which triggers the climate changes. Therefore, IMO declared in MEPC 72 regarding mitigation strategy on greenhouse gas aiming to reduce 50% of emission by 2050, ultimately eliminate gas emission within a century. The new policy includes decarbonization in shipping design, development and shift on alternative green energy from a traditional chemical fuel, practical test of green energy by the shipping company, and collaborative research and development on decarbonized maritime transport. For the Korea Maritime industry to be competitive and sustainable, sufficient policy support from the government as well as autonomous commitment from organizations is crucial for successful decarbonization.
동아시아 양만(養鰻)산업의 문제점 및 개선방안에 관한 연구
한능호(Neung Ho Han),강효녕(Hyo Nyeong Kang) 한국해양비즈니스학회 2016 해양비즈니스 Vol.- No.34
As a subject of aquaculture production, Eel(Genus Anguilla) is mostly farmed in the East Asia region, including Korea, China, Taiwan and Japan. However, there is a growing concern on the future of the Eel aquaculture industry, as the production is declining due to overfishing and habitat destruction and the protection movement for natural resources spread globally. This study examines the status and immediate problems of the Eel aquaculture industry in each East Asian country and suggests their solutions. As a result of the study, it has been revealed that an establishment of a reliable statistic management system, organization of the related regulations and laws, and enhancement of a transparent distribution structure are needed for the development of the Eel aquaculture industry.
한능호(Neung-Ho Han),박철주(Chul-Ju Park),정태석(Tae-Seok Jeong) 한국해양비즈니스학회 2011 해양비즈니스 Vol.- No.19
Recently, as world port environment rapidly changes, competition for securing quantity of goods transported among ports becomes fiercer and they seek strategy to develop central ports through broadscale investment on facilities. In case of Japan, they are experiencing tough time as prolonged economic recession and slowdown caused a decrease in the quantity of goods transported, which leads to a search for development through transformation of port management policy and to a strategically concentrated support policy at national level that enables enhancement of international competitiveness of the port as well as reclamation of the position as the hub container port of East Asia which was enjoyed in the past. This study examines the trend of Japan’s port logistics and considers the trend of Japan’s port management policy through review of literature. Moreover, management policy of Hanshin port, appointed as an international container hub in 2010, is looked over and it is summarized as sharp cut in the port use cost and reduction in lead time. The implication of this study is that Korean ports need to prepare policy options to cope with Japan’s port management strategy.