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An Expand of Oligopoly Theory and Commercial Policy to International Trade
Rhu, Duk-Wi,Min, Kyung-Se 大田工業大學 1992 한밭대학교 논문집 Vol.9 No.2
Recently, with growth of industrial organization theories, there seems to be necessary for an intergration of industrial organization theories and international trade theories. This paper applied Cournot and Bertrand's duopoly model to international trade theory and analyzed producer's revenue.
류지성,정규혁,최필선,이길철,최덕일,최성수,류홍일,박광식 한국환경독성학회 1998 환경독성보건학회지 Vol.13 No.1
Cadmium, a major aquatic pollutant in many parts of the world, is toxic and readily accumulated in aquatic organisms. It mainly exists in water as complexes with organic ligands such as dissolved organic carbon and this complexation is known to have effects on the aquatic toxicities. In this study, acute toxicity, histology, and bioaccumulation were studied to evaluate effects of humic acid on cadmium toxicity and bioavailability to fish using Oryzias latipcs and Cypriruts carpio. 96h~LC50 of cadmium was 6.38 mg/L using Oryzias latipes. However, the mortality showed the dose-dependent decrease when humic acid was added to the test solution. When fish were exposed to 5 mg/L of cadmium, histological changes in the exposed organs (caudal fins, gills, kidney, liver, and gut) of Cyprinifs carpio were decreased by humic acid, especially in kidney and liver. Bioaccumulation of cadmium also decreased by treatment of humic acid. It seems that the formation of complexes between cadmium and humic acid may decrease bioavailability of cadmium to fish, and thus reduce the toxic effects of cadmium.
Utility accrual real-time scheduling for (m, k)-firm deadline-constrained streams on multiprocessors
Rhu, J.-H,Sun, J.-H,Kim, K,Cho, H,Park, J K IET 2011 Electronics letters Vol.47 No.5
<P>Considering video conferencing applications, presented is the first utility accrual (or UA) real-time scheduling algorithm for multiple (<I>m</I>, <I>k</I>)-firm deadline-constrained streams running on multiprocessors, called the global multiprocessor utility accrual scheduling algorithm for (<I>m</I>, <I>k</I>)-firm deadline-constraint multimedia streams (or gMUA-MK). Analytical and experimental studies show that gMUA-MK achieves timeliness performance and relatively high quality of multimedia services compared to existing schemes including gMUA.</P>
류지성,정규혁,최필선,이길철,최덕일,최성수,류홍일,박광식 성균관대학교 약학연구소 1998 成均藥硏論文集 Vol.10 No.1
Cadmium, a major aquatic pollutant in many parts of the world, is toxic and readily accumulated in aquatic organisms. It mainly exists in water as complexes with organic ligands such as dissolved organic carbon and this complexation is known to have effects on the aquatic toxicities. In this study, acute toxicity, histology, and bioaccumulation were studied to evaluate effects of humic acid on cadmium toxicity and bioavailability to fish using Oryzias latipes and Cyprinus carpio. 96h-LC50 of cadmium was 6.38 ㎎/L using Oryzias latipes. However, the mortality showed the dose-dependent decrease when humic acid was added to the test solution. When fish were exposed to 5㎎/L of cadmium, histological changes in the exposed organs(caudal fins, gills, kidney, liver, and gut) of Cyprinus carpio were decreased by humic acid, especially in kidney and liver. Bioaccumulation of cadmium also decreased by treatment of humic acid. It seems that the formation of complexes between cadmium and humic acid may decrease bioavailability of cadmium to fish, and thus reduce the toxic effects of cadmium.
( Jinsoo Rhu ),( Jong Man Kim ),( Gyu-seongchoi ),( Jae-won Joh ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: This study was designed to analyze the impact of venous outflow congestion in the liver graft on hepatocellular carcinoma recurrence with liver transplantation Methods: Hepatocellular carcinoma patients who underwent living donor liver transplantation in Samsung Medical Center between 2007 and 2018 were reviewed. Based on 2-week post-transplantation computed tomography, volume of the congested parenchyma was calculated. Patients were divided into five groups based on the congestion volume. Recurrence-free survival and overall survival was analyzed using multivariable Cox proportional hazard model including the degree of venous congestion. Results: A total of 582 patients were included. There were 350 patients (60.1%) with no congestion, while congestion volume less than 100 ㎤, between 100 to 200 ㎤, between 200 to 300 ㎤, and ≥300 ㎤ were present in 58 (10.0%), 109 (18.7%), 40 (6.9%) and 25 (4.3%), respectively. Congestion volume (P=0.008) was a significant risk factor recurrence-free survival. Congestion volume of ≥300 ㎤ (HR=3.349, CI=1.703-6.587, P<0.001) showed significantly poorer recurrence-free survival compared to patients with no congestion. Conclusions: Venous outflow congestion in the liver after living donor liver transplantation was related to poor recurrence-free survival of hepatocellular carcinoma.
류상일(Rhu Sang Il) 한국국정관리학회 2005 현대사회와 행정 Vol.15 No.2
한국의 재난대응체계는 재난대응 조직간 인적ㆍ물적 연계시스템이 부재한 관계로 재난대응에 있어서 그 대응시기의 적실성을 놓치게 되며, 이로 인하여 더 큰 피해를 불러오게 된다.<BR> 따라서 본 연구는 한국정부의 효율적인 재난대응체계 구축을 위한 BRM 활용방안을 모색해 보고자 한다. 즉, 기존 한국정부의 부처중심 재난관리 시스템을 수요자 즉, 국민중심 재난 관리시스템으로의 전환을 시도하고, 이를 위하여 미국 부시행정부가 도입한 BRM(Business Reference Model)을 중심으로 하여 한국 재난대응체계와의 접목을 시도해 보고, 이를 통하여 재난대응체계의 조직간 인적ㆍ물적 연계시스템을 구축해 보고자 한다.<BR> 결론적으로 BRM을 도입하게 되면, 재난대응체계의 핵심기능인 경보 기능, 소개 기능, 응급의료 서비스 기능, 탐색ㆍ구조기능, 질서유지 기능, 긴급피해복구 등과 관련하여 타 부처의 업무를 알 수 있음으로 자연스레 자원 중복으로 인한 비효율을 방지하게 되고, 재난 발생 시에 각 부처 간의 네트워크 확보로 인하여 더욱 신속한 재난대응이 이루어지게 되어, 대응시기의 적실성이 이루어져 피해를 줄이게 된다. 이와 같이 재난대응체계에 BRM을 도입하게 된다면 재난에 효율적으로 대처하기 위한 기능 수행을 위하여 각 부처가 협조와 협력을 할 수 있는 계기를 마련하게 되어 보다 효율적인 재난대응체계를 구축할 수 있게 될 것이다.
( Jinsoo Rhu ),( Gyu-seong Choi ),( Jong Man Kim ),( Jae-won Joh ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: For living donor liver transplantation, preoperative imaging is required for the safety of donor and recipient. As we started our image-guidance program using 2D illustrations and 3D modeling since September 2018, we analyzed the changes in the clinical outcomes. Methods: Living donors and recipients who underwent liver transplantation between September of 2017 to August 2019 were included. Cases with image-guidance were compared to cases without image-guidance regarding operational outcome especially bile duct opening in graft as well as surgical complications. Results: Among 200 living donor transplantation, 90 transplantations were performed with image-guidance. The image- guidance group had higher rate of laparoscopy (80.9 vs. 97.8%, P<0.001) and shorter operation time (259.8±47.3 vs. 240.3±34.4 minutes, P=0.002) compared to the no image-guidance group. Although there was no difference in bile duct type (P=0.144), there was more grafts with single bile duct opening in the image-guidance group (52.7% vs. 80.0%, P=0.001). Consequently, achievement in bile duct openings was superior in the image guidance group. (P=0.022) There were no difference in bile leakage, graft failure, and death during the 1-month post-transplantation period. Conclusions: As we initiated our image-guidance program for living donor liver transplantation, clinical outcomes, especially bile duct division were improved than before.