• Maritime Security
• /
• v.1 no.1
• /
• pp.149-173
• /
• 2020

While the United States and other Western states are in trouble with COVID-19 crisis, China is continuing its aggressive ocean expansion with its Gray-zone strategy. The Gray-zone strategy, which China uses around the South China Sea, refers to a strategy that promotes a change in international politics by creating an unclear state, neither war or peace. China, which is trying to expand its influence across East Asia, will also try to project a Gray zone strategy on the Korean Peninsula. The possible scenarios are as follows: 1) South Korea is accidentally involved in a dispute in the South China Sea, 2) Military conflicts between South Korea and China is caused by illegal fishing of Chinese boats in Yellow Sea, 3) China tries to interfere with Socotra Rock, 4) Unlikely, but possible in the future that China induce the military conflicts between Korea and Japan on the Dokdo issue. In order to cope with these scenarios, Korea should prepare the following measures from a long-term perspective: the creation of an Asian maritime safety fleet, the integ rated operation of the navy and the coast guard in the framework of the national fleet, and strengthening the conflict control system for China's provocations.

• Korean Journal of Weed Science
• /
• v.12 no.2
• /
• pp.110-123
• /
• 1992

To investigate the safening effect of dymron against cinosulfuron, the responses of 104 rice cultivars and lines to single and mixture treatments of cinosulfuron [3-(4.6-dimethoxy-1,3,5-triazin-2-yl)-1-[2-(2-methoxyethoxy)-phenylsulfonyl]-urea] and dymron [1-(${\alpha}$, ${\alpha}$-dimethylbenzyl)-3-p-tolyl urea] were evaluated. The responses of 104 rice cultivars and lines to cinosulfuron were differed. Among the rice cultivars, growth of Calrose, Dasukei, Hwajinhyeo, and Milyang 105 was significantly inhibited by cinosulfuron but there was no inhibition in Daeseongbyeo, Iri 371, Jangseongbyeo, Taebaegbyeo and IR 74. The japonica types were generally inhibited more than the indica and indica${\times}$japonica types. When Kwangmyungbyeo was treated with the mixtures of cinosulfuron 48g and 96g ai/ha with dymron 450g ai/ha, the inhibition of plant height was significantly reduced regardless of dymron concentrations. With increase in cinosulfuron concentration, the safening effect of dymron against cinosulfuron was more evident in plant height than fresh weight. On the other hand, dymron did not have any safening effects of cinosulfuron on Echinochloa crus-galli at any concentrations. The mixtures of dymron and cinosulfuron produced antagonistic effects on the plant height regardless of rice cultivars and treatment concentrations. At cinosulfuron 24g ai/ha, the effects of the mixtures of cinosulfuron and brassinolide on the plant height of Kwangmyungbyeo and IR 74 were similar irrespective of brassinolide concentrations but the inhibition of Kwangmyungbyeo was greater than that of IR 74 as the concentrations of cinosulfuron increased. The effects of the mixtures of cinosulfuron at concentration of 96g ai/ha with various ABA levels on the plant height of both Kwangmyungbyeo and IR 74 showed synergistic effect regardless of ABA concentration. However, the response of fresh weight of both cultivars treated with cinosulfuron at 96g ai/ha with ABA synergisism was observed in Kwangyungbyeo while IR 74 showed antagonism.

• Proceedings of the Korea Association of Information Systems Conference
• /
• 2004.05a
• /
• pp.122-137
• /
• 2004

Automation of a container terminal is a world-wide tendency nowadays. The interest of ACT (Automated Container Terminal) is increasing more and more because of necessity of container terminal with higher competitive power and ultramodern equipment to down the cost and up the efficiency. ECT (Europe Combined Terminals) and CTA (Container Terminal Altenwerder) have studied a detailed technique for the operation of ACT. In Korea, many projects related to the development of ACT are working at present. However, indiscreet introduction of ACT may cause tremendous loss. Thus it is much important thing that we search relevant automation level or type for an environment In this study, we propose the necessary strategy in developing ACT through analyzing the present condition, automated equipments and property of operation at advanced An. If the strategy is applied in development of domestic ACT, we'll be able to build ACT with higher competitive power.

• Journal of the East Asian Society of Dietary Life
• /
• v.10 no.4
• /
• pp.305-310
• /
• 2000

This study was attempted to investigate the effect of pine pollen on the chloroform toxicity in rat serum and liver. The subjects were administrated with the graded concentraton of tow different levels of chloroform(1%, 5%) and an additional amount of pollen (1%, 5%) to some groups. the results were as follows: The activity of aspartate aminotrasferase(AST), alanine aminotrasferase(ALT) and lactate dehydrogenase(LDH) in serum, liver, and kidney increased in proportion to the chloroform concentration, but decreased in the pine pollen-treated groups. The amount of total cholesterol in serum of he chloroform administration groups was higher than that of the control group, and it decreased gradually with pine pollen administration.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2006.05a
• /
• pp.971-974
• /
• 2006

핸드오프가 자주 발생할 경우 모바일IP에서 제어 메시지가 많이 발생하게 된다. 이러한 문제를 해경하기 위해서 마이크로 모빌리티 프로토콜이 제안되었다. 이 논문에서 마이크로 모빌리티 환경에서 안전한 멀티캐스팅 서비스를 제공하기 위한 방법에 대해 소개한다. 먼저 마이크로 모빌리티 환경에서의 멀티캐스팅 서비스 프로토콜을 소개하고 이 프로토콜을 기반으로 보안 서비스를 추하한다. 제안된 멀티캐스트 라우팅 프로토콜은 공유 멀티캐스트 트리를 만들고 다른 유니캐스트 마이크로 모빌리티 프로토콜을 고려하지 않는다. 추가된 보안 서비스는 인증, 권한, 기밀성, 그리고 완전무결성이 대칭이나 비대칭 암호와 알고리즘을 기반으로 하여 포함되어 있다. 또한 보안 프로토콜은 그룹의 멤버가 자주 바뀌고 핸드오프가 일어나는 현상을 다루기 위하여 페이징 지역을 기준으로 계층적 키 구조를 사용한다.

• Journal of the KSME
• /
• v.35 no.9
• /
• pp.836-847
• /
• 1995

파울링은 열교환기에 형성되는 열저항으로 에너지 손실에 많은 영향을 미친다. 그러나 파울링은 그 예측이나 감소 또는 제거가 매우 어려운 것으로 인식되어 왔다. 작동유체자체를 철결하게 유지함으로써 파울링을 감소할 수도 있으나 작동유체 자체의 특성 때문에 본질적으로 작동유체를 청결하게 유지할 수 없는 경우가 대부분이다. 즉, 폐열 회수의 대상이 되는 액체가 하천수나 생 활하수인 경우 작동액체를 청결하게 유지함으로써 파을링을 저감시피는 방법은 타당치 않다.일 본의 폐얼회수 프로젝트와 담수화 프로젝트에서 특이한 점은 두 가지 프로젝트에서 열교환기면의 파울링 문제 해경을 전열 촉진의 내용과 거의 비슷한 비중으로 다루고 있다는 점이다. 파울링은 오래 전부터 열시스템설계자의 주요 관심사였으나 큰 진전은 없었다. 그러나 현재는 주변기술이 발달로 더 이상 연구 불가능 영역은 아닐 듯 싶다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2007.12a
• /
• pp.216-218
• /
• 2007

세계 선진항만은 해운물류시장의 변화에 대응하고, 경쟁력 확보 방안으로 첨단 자동화 장비와 운영시스템 도입을 통한 자동화를 지향하고 있다. 국내 부산항 신항 또한 자동화 컨테이너터미널로 개발을 추진하고 있는 것으로 알려져 있다. 자동화 터미널은 각종 자동화 장비와 시스템이 유기적으로 구성되어 있으며, 이들의 효율적인 운영을 통해 생산성을 향상시킬 수 있다. 터미널의 안벽과 장치장 사이의 컨테이너 운송을 담당하는 이송장비는 컨테이너터미널의 핵심장비로 이의 효율적인 운영은 컨테이너터미널의 생산성과 직결되어 있다. 본 연구에서는 자동화 컨테이너터미널의 운영생산성 향상을 위한 하역장비와 이송장비의 운영방안에 대하여 연구한다. 특히 DHST(Dual Hoist Second Trolley)타입의 QC와 ASHC의 장비특성과 장비간의 연계작업을 고려하여, QC의 대기시간을 최소화하여 하역 생산성을 최대화할 수 있는 ASHC Dispatching Rule을 제시하고자 한다.

• Journal of the Korean Institute of Oriental Medical Informatics
• /
• v.16 no.1
• /
• pp.75-103
• /
• 2010

Lingshu, discusses acupuncture therapy in great detail. And there are many aspects in the book devoted to acupuncture, especially acupuncture description is rather and more organized. The book establishes the theory of meridians which explains the roots of meridians in details, and points out the location of acupoints and describes the standard of how to locates acupoints, sets forth nine kinds of needles and their uses. It lays thetheoretical foundation of Korean Medicine. This article could help improve the understanding of the blood-letting therapy in "Lingshu" and also paves the way for applying the therapy to treatment of the various diseases.

• Journal of the Korean Institute of Oriental Medical Informatics
• /
• v.16 no.1
• /
• pp.135-139
• /
• 2010

Quotations in "Dongeuibogam" are originated from books of Oriental Medicine. Those are exactly same with original books. However, some quotations are not in same comparing to original books. Authors are in concerns that the original sentences which are quoted in "Dongeuibogam" are how different and how similar or same, with comparing methods between them. As a result, we could find out original sentences in original books and we could make comparison between those and quotations of chapter of bone in "Wehyungpyun", "Dongeuibogam". Also we could get explanations of qoutations' accuracies.

• Journal for History of Mathematics
• /
• v.27 no.1
• /
• pp.13-30
• /
• 2014

The book ${\ll}$Ceyuan Haijing${\gg}$ studies inscribed and circumscribed circles in a right triangle and shows equations that give the diameters of the circles. We discuss the development of mathematical contents written by the scholar Yang Zhaoyun in Qing dynasty on the contents of ${\ll}$Ceyuan Haijing${\gg}$ in his book ${\ll}$Jiuyong Yandai${\gg}$. He derived equations to find the diameters of the circles based on algebraic knowledge known in the Qing dynasty. In this paper, we conclude that Yang's methods in devising the equations include the Gou-Gu Theorem, mathematical expressions derived from Gou-Gu ratio table, and the technique of interchanging triangles and events. We conclude that the Gou-Gu ratio table was a very important tool when Yang devised the equations in ${\ll}$Ceyuan Haijing${\gg}$.