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강윤구 ( Yoon Koo Kang ),구동회 ( Dong Hoe Koo ) 대한내과학회 2013 대한내과학회지 Vol.85 No.4
Gastrointestinal stromal tumors (GISTs), which are the most common mesenchymal tumors of the gastrointestinal tract, have represented an important advance in oncology field with the success of molecular targeted therapy. Since the approval of the tyrosine kinase inhibitor (imatinib) in 2002, the survival of patients with advanced GISTs has significantly increased. Accurate histopathologic diagnosis of GISTs and multidisciplinary approach has become more important for successful management of GISTs. Recently, imatinib has become a standard treatment even in adjuvant setting, and regorafenib has been approved for advanced GIST after failure of imatinib and sunitinib. This review presents here the updated results of relevant clinical studies for the further revision to the guideline of Korean GIST study group. We hope this review will help enhance the quality of diagnosis, treatment, and care of patients with GIST in Korea. (Korean J Med 2013;85:341-353)
파향제어방식을 이용한 새로운 해안침식대책 기술 개발(1):해안침식 발생ㆍ대책 동향 및 신방식 제안
강윤구(Yoon-Koo Kang),홍창배(Chang-Bae Hong) 한국연안방재학회 2016 한국연안방재학회지 Vol.3 No.1
The coastal erosion is largely affected either by construction of port/fishery harbor, or coastal road revetment, which of each breaks the balance of longshore sand transport and one of cross-shore sand transport in coast, respectively. The detached type breakwater have been applied to control longshore sand transport as coastal erosion measures against construction of port/fishery harbor which cause longshore sand transport. However, it also produces new coastal erosion near area. Recently, the artificial reef (A.R.) is almost constructed on the standpoint of landscape as coastal erosion measures in Korea. A.R. is a submerged breakwater with wide crest and had developed to overcome weakness on the detached and submerged breakwaters. The wave is turned into strong longshore current passing through A.R., which occasionally results in scouring erosion around the A.R by increasing the water level at the back of A.R. In this study, we examined the coastal erosion occurrence by port/fishery harbor development and tendency of erosion measures. Also, problems of A.R. are examined with review on research and application example. Based on these, this study proposes new coastal erosion management method, ‘New CeM’, for erosion measure in coast where balance of longshore sand transport is broken. Instead of directly protecting against the ingressive wave, the new method is the wave direction control system for correcting the imbalance of longshore sand transport by obliquely installing breakwater of detached type. The performance and physical phenomenon of New CeM will be introduced later.
태풍 매미 내습시 해일ㆍ고파랑에 의한 호안ㆍ안벽에서의 수위증가 패턴 고찰
강윤구(YOON-KOO KANG) 한국해양공학회 2005 韓國海洋工學會誌 Vol.19 No.6
We investigated the characteristics of the overflow/wave overtopping, induced by the storm surge and high waves in Masan bay and Busan Coast during Typhoon 'Maemi', which landed at the southeast coast of the Korean peninsula on September, of 2003, causing a severe inundation disaster. Characteristics of the water level, increase by the overflow / wave overtopping, were discussed in two patterns. One is the increase of water level in the region, located inside of a bay, like Masan fishing port, and the waves are relatively small. The other is in the open sea, in which the waves act directly, as on the seawall in Suyong bay. In the former region, the water level increase was affected by the storm surge, as well as the long period oscillation and waves. In Masan fishing port, about 80% of the water level increase on the quay wall was caused by the storm surge. In the latter one, it was greatly affected by the wave run-up. In Suyong bay, about 90% of the water level increase on the seawall was caused by the wave run-up.
강윤구(Yoon-Koo KANG),정해용(Hae-Yeong Chung),이명호(Myung-Ho LEE),윤형석(Hyung-Seok Yoon),남지현(ji-Hyun Nam) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.추계
기존 방파제의 상치부 형상은 직립형이 대부분이었으나 최근에는 이용자들의 친수성을 고려하여 친수식계단형을 많이 도입하고 있는 실정이다. 그러나 직립형은 월파 및 반사파 저감 효과 등의 수리적 특성이 떨어지며, 친수형계단형은 월파발생이 쉬운 구조로서 항내 정온도 및 항만가동을 확보에 불리한 구조이다. 이에 대한 단점을 보완하고자 파압저감 및 월파 저감 효과가 뛰어난 다단계소파형 곡면파라펫 상치를 개발하여 현장에 적용하였다. The superstructure with vertical walls had widely been applied in the design of breakwater and more water-friendly superstructures with stairs, providing people with improved accessibility, have recently been introduced. But it is proved that vertical walls have inferior hydraulic performance in controlling wave-reflection & wave-overtopping and water-friendly stairs also give adverse effects on port operation-ratio & port calmness due to more wave-overtopping, respectively. As all alternative to the above, wave-absorbing curved-surface parapets in serials on the superstructure of breakwater, which are verified to have less wave-attack force and wave-overtopping through various tests, are recommended and applied to the detail design for construction.
파랑작용에 의한 준설토 지반의 안정성에 관한 실험적 연구
강윤구(YOON-KOO KANG) 한국해양공학회 2006 韓國海洋工學會誌 Vol.20 No.4
Detailed investigations were carried out on the stability of the dredged soil bed against wave actions, aimedat establishing the design method of artificial tidal flats using dredged soil. The soil was dredged at Nagoya port, Japan, and has a mean grain size of 0.013㎜. Basic features of artificial dredged soil bed against wave actions were explained from a series of model experiments in a wave flume. The two types of section shapes were employed; one is a horizontal bed and the other is a sloped one. Changes of the bed profile, shear strength, grain size distribution and water content, according to the wave actions,were measured in detail. The cumulative effect of the wave actions, over about one week,was investigated. A dredged soil bed moves withthe wave actions with relatively small wave height. It should be especially noted that the clay component is dissolved and flown out, away from the surface layer, and consequently the surface layer hardens, as if it is covered with sand. When the wave height is gradually increased, the bed is not liquefied and the shear strength of the dredged bed is increased by a wave-induced dissipation of pore pressures in the bed and a decrease of clay component by the wave-induced leakage.
NOAA의 장기 파랑 추산자료를 이용한 동해안의 고파랑 내습경향 분석
강윤구(Yoon Koo Kang),안승현(Seung Hyun An),이용기(Yong ki Lee) 한국연안방재학회 2017 한국연안방재학회지 Vol.4 No.1
Incident wave conditions are very important in coastal engineering field such as construction and prevention of coastal disaster. In recent years, opinions increasing incident wave height at the East Sea have been stood out, furthermore, matters such as damage of harbor and coastal erosion are attributed to them. But, long term variability of incident wave condition has to sufficiently and carefully identify with long term data. In this context, this study tried to analyze long term variability of incident waves at the East Sea using long term hindcast wave data provided by NOAA. Annual averages, Root mean square error, and annual maximum of significant wave height are analyzed to figure out long term variability of wave height over 36 years. Also, occurrences of wave heights higher than 2 and 5 m are investigated to reveal trends of high wave appearance. As a result, both of increasing and decreasing trends are identified. The largest rate of increments of wave heights is around 0.24 cm/year, meaning total increment of wave height for 36 years is around 8.6 cm. On the other hand, The largest rate of decreases of wave heights is around 0.17 cm/year, meaning total decreases of wave height for 36 years is around 6.1 cm.