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홍성원(Hong Sung Won) 한국슬라브유라시아학회 2005 슬라브학보 Vol.20 No.2
The purpose of this paper is to study the process of change in ownership structure in the Russian oil industry and Putin's oil policy and its implication. For this purpose, author examined privatisation process of Russian oil industry. Russian oil industry has been completely restructured in the process of privatisation program of the 1990s. In result, vertically-integrated type oil companies was established during the terms of former President Yeltsin. After restructuring of russian oil industry, ownership structure was completely changed from state's control to private ownership. Since Yukos scandal happened, the dominant position of vertically-integrated oil companies declined and Putin government's control about oil production and export was more and more tightening. President Putin attempts to take back control of the oil industry. At present russian government use various policy as means of more controlled development of oil production and export. Taxation, licensing and oil pipeline system are considered as the most efficient tools. Based on the results of this study, author provides some implications about Putin's oil policy. Various statistics exactly showed efficiency of private oil companies in operating oil production and export. So author suggests Putin government take steps to guarantee profit of vertically integrated oil company and tax their excess oil rent at the rational level. Establishment of stable business environment suitable for activities of private oil company will be a win-win strategy for each other.
3분과 : 가선집재작업에서의 작업 생산성 및 비용 분석
한원성 ( Won Sung Han ),한한섭 ( Han Sup Han ),김남훈 ( Nam Hun Kim ),차두송 ( Du Song Chu ),조구현 ( Koo Hyun Cho ),민도홍 ( Do Hong Min ),권기철 ( Ki Cheol Kwon ) 한국임학회 2014 한국산림과학회지 Vol.103 No.1
본 연구에서는 임목수확작업에 사용되는 집재기계의 작업효율성을 분석하여 경사가 급한(20° 이상) 작업조건에 적합한 가선계 집재기계를 선정하는데 기초 정보를 제공하고자, 타워야더(RME-300T), 트랙터부착형 집재기(일명: 춘천집재기), 트랙터윈치(FARMI) 등에 의한 집재작업에서의 작업생산성 및 비용을 비교 분석하였다. 평균 흉고직경이 20 cm, 집재거리 60 m, 가로집재거리 10 m, 그리고 기계이용률이 70%인 동일한 작업 조건에서 작업이 이루어질 경우, 타워야더의 1일 집재작업 생산성은 33.04 m3/일, 트랙터부착형 집재기는 38.47 m3/일, 그리고 트랙터윈치는 14.17 m3/일으로 분석되었으며, 이에 따른 집재작업비용은 각각 25,105원/m3, 20,520원/m3, 37,835원/m3으로 나타났다. 동일한 작업조건에서 집재거리에 따른 각 집재기계별 작업효율성을 비교하였을 경우, 집재거리가 40 m 이내로 짧을 경우에는 트랙터윈치에 의한 집재작업이 효율적이며, 40~140 m의 집재거리에서는 춘천집재기가, 140 m 이상의 장거리 집재작업에서는 타워야더가 가장 효율적인 것으로 나타났다. This study was conducted to provide field-based harvesting study information which can be used to select an optimal cable system for certain work conditions on steep grounds (>20° ground slope) in Korea. Toaccomplish this study objectives, we evaluated three cable yarding systems (RME-300T tower-yarder, Chuncheontower-yarder, FARMI tractor winch) working in typical work conditions for their yarding productivity and operational efficiency. Those yarders are commonly used for removing logs or trees on steep grounds in Korea. Under the same work conditions (average DBH of tree to be cut, 20 cm; yarding distance, 60 m; lateral yardingdistance, 10 m; and machine utilization rate, 70%), the average productivities were 33.04 m3/day, 38.47 m3/day, and 14.17 m3/day for RME-300T, Chuncheon tower-yarder, and FARMI, respectively. Our standardized cost comparison study also showed that the yarding cost was highest at 37,835 won/m3 with FARMI, followed byRME-300T at 25,105 won/m3 for the same work conditions. We found the lowest yarding cost with the Chuncheon tower-yarder at 20,520 won/m3 which was resulted primarily from high yarding productivity at theyarding distance (60 m). Our analysis suggested that a small machine such as FARMI could be a low-costyarding machine option for a cable yarding job with a short yarding distance (40 m or less). The Chuncheontower-yarder is well suited for a mid-range yarding distance job in Korea, ranged between 40 to 140 m. Ifyarding distance were longer than 140 m, the RME-300T tower yarder appears to be most cost-effective.
Jin Tae Hong, Dohee Won1, Mi Hee Park, Sun Mi Kown, Miran Jo, Sang-Yoon Nam, Beom Jun Lee, Young Won Yun, Ki-Wan Oh, Sang Bae Han 충북대학교 동물의학연구소 2011 Journal of Biomedical and Translational Research Vol.12 No.4
The objective of this study was to determine the effect of macrophages on growth of human colon cancer cells. The results showed that co-culture of colon cancer cells with macrophages inhibited the growth of colon cancer cells (HCT116 and SW620) depending on the number of macrophages, RAW 264.7 cells, and activated THP-1 cells accompanied by down regulation of pSTAT3 in cancer cells. We also found that expression and release of cancer cell growth inhibitory cytokines, IL-1 receptor antagonist (IL-1ra) and IL-10, was increased in macrophages. Blocking of the STAT3 pathway with specific inhibitor and siRNA of STAT3 abolished the growth of colon cancer cells and expression of IL-1ra and IL-10. In addition, neutralization of IL-1ra and IL-10 with antibodies resulted in reversal of macrophage-induced inhibition of cancer cell growth. These data showed that IL-1ra and IL-10 released from macrophages inhibit growth of colon cancer cells through inhibition of the STAT3 pathway
김병호 ( Byung Ho Kim ),감신 ( Sin Kam ),배상근 ( Sang Geun Bae ),김건엽 ( Keon-yeop Kim ),이원기 ( Won Kee Lee ),홍남수 ( Nam-soo Hong ),박형근 ( Hyeung-keun Park ),이혜진 ( Heyjean Lee ),조은정 ( Eun-jung Cho ),채성철 ( Shung C 한국보건정보통계학회(구 한국보건통계학회) 2017 보건정보통계학회지 Vol.42 No.1
Objectives: This study was conducted to investigate economic feasibility of operating Regional Cardiocerebrovascular Centers using cost-benefit analysis. Methods: The current study assessed cost and benefit data collected from nine hospitals which were designated as Regional Cardiocerebrovascular Centers between 2008 and 2010. Results: The operation of Regional Cardiocerebrovascular Centers reduced mortality rate and length of stay due to acute myocardial infarction and stroke and also decreased disability occurred after stroke. The total calculated cost of operating nine Regional Cardiocerebrovascular Centers was 19.85-22.30 billion won and the minimum benefit calculated was 23.98 billion won. Applying the maximum cost and the minimum benefit, the net benefit was 1.68 billion won, which is estimated to 190 million won per Regional Cardiocerebrovascular Center. Conclusions: The present study revealed that the operation of Regional Cardiocerebrovascular Centers was economically beneficial. The benefit would be larger if intangible benefit such as the long-term effects to community hospitals and enhancement of quality of life of patients and their families are considered.
The 2020 revision of the guidelines for the management of myeloproliferative neoplasms
( Sung-yong Kim ),( Sung Hwa Bae ),( Soo-mee Bang ),( Ki-seong Eom ),( Junshik Hong ),( Seongsoo Jang ),( Chul Won Jung ),( Hee-jin Kim ),( Ho Young Kim ),( Min Kyoung Kim ),( Soo-jeong Kim ),( Yeung- 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.1
In 2016, the World Health Organization revised the diagnostic criteria for myeloproliferative neoplasms (MPNs) based on the discovery of disease-driving genetic aberrations and extensive analysis of the clinical characteristics of patients with MPNs. Recent studies have suggested that additional somatic mutations have a clinical impact on the prognosis of patients harboring these genetic abnormalities. Treatment strategies have also advanced with the introduction of JAK inhibitors, one of which has been approved for the treatment of patients with myelofibrosis and those with hydroxyurea-resistant or intolerant polycythemia vera. Recently developed drugs aim to elicit hematologic responses, as well as symptomatic and molecular responses, and the response criteria were refined accordingly. Based on these changes, we have revised the guidelines and present the diagnosis, treatment, and risk stratification of MPNs encountered in Korea.
( Sung Hun Park ),( Chang Yu Park ),( Ji No Na ),( Cheol Ung Choi ),( Hongeuy Lim ),( Jin Won Kim ),( Eung Joo Kim ),( Seung Woon Rha ),( Hong Seog Seo ),( Dong Joo Oh ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: We evaluated the prevalence of gastroesophageal refi ux diseases (GERD) in noncardiac chest pain (NCCP) patients, risk factors for GERD, and status of prescriptions for GERD in Korean population. Methods: This was a retrospective non-interventional observational nation-wide multicenter (45 centers) study. Patients who had a normal coronary angiogram (CAG) and upper gastroendoscopy within 2 years after CAG were enrolled. The prevalence of GERD among them was examined. Other gastrointestinal diseases including peptic ulcer diseases or gastritis were also examined. We compared the risk factors for GERD between the GERD group and non-GERD group. The ratio of patients who had a medications for gastrointestinal diseases (antacids or proton-pump inhibitor) was also examined. Results: Total of nine hundred four patients were enrolled. The prevalence of GERD among NCCP patients was 436(48. 2%) of 904 patients. Peptic ulcer disease were present in 154 patients, 17. 0%. The prevalence of gastritis was 659(72. 9%) of 904 patients. There was no difference in risk factors for GERD between GERD group and non- GERD group. Medications for GERD and other gastrointestinal diseases were prescribed in 742 patients, 82. 1% of all the NCCP patients. Conclusions: GERD were common (42. 8%) in Korean NCCP patients and most of them (82. 1%) were prescribed for GI medications in Korea. But we could not fi nd any differences in risk factors between GERD and non-GERD groups.
HONG, Yoonki,RA, Seung W.,SHIM, Tae S.,LIM, Chae-Man,KOH, Younsuck,LEE, Sang D.,KIM, Woo S.,KIM, Dong-Soon,KIM, Won D.,OH, Yeon-Mok Blackwell Publishing Asia 2008 Respirology Vol.13 No.4
<P>Background and objective: </P><P>A new interpretative strategy for pulmonary function tests (PFT) has been proposed by the American Thoracic Society/European Respiratory Society (ATS/ERS) Task Force. To assess the accuracy of this strategy, clinical diagnosis was compared with the PFT interpretation in patients showing concomitant decreases in FEV<SUB>1</SUB> and FVC.</P><P>Methods: </P><P>A retrospective study was conducted of 681 patients with normal FEV<SUB>1</SUB>/FVC and low FVC who underwent lung volume measurements and spirometry on the same date between July and November 2005 at Asan Medical Center, Seoul, Korea. Patients were clinically diagnosed by the consensus decision of two respiratory physicians, and the kappa coefficient was calculated to compare the clinical diagnosis with the PFT interpretation using the ATS/ERS strategy.</P><P>Results: </P><P>The PFT interpretation showed an obstructive pattern in 205 patients and a restrictive pattern in 476. Of the 205 patients with an obstructive pattern on PFT, 44 were clinically diagnosed with obstructive, 97 with restrictive and 17 with mixed disease, whereas 47 patients had no disease. Of the 476 patients with a restrictive pattern on PFT, 11 were clinically diagnosed with obstructive, 369 with restrictive and 60 with mixed disease, whereas 36 patients had no disease. The kappa coefficient was 0.35 (95% confidence interval: 0.26–0.44; <I>P</I> < 0.0001).</P><P>Conclusions: </P><P>The weak agreement between the clinical diagnosis and the PFT interpretation in patients showing concomitant decreases in FEV<SUB>1</SUB> and FVC suggests that other clinical findings should be assessed in addition to PFT.</P>
Hong, Young Kyu,Oh, Se Jin,Oh, Seung Min,Yang, Jae E.,Ji, Won Hyun,Kim, Sung Chul 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.2
Heavy metal pollution in agricultural field near the abandoned metal mines is a critical problem in Korea. General remediation technique is to apply chemical amendments and soil covering. However, there is no specific guidelines for conducting soil covering. Therefore, main objective of this research was to determine optimum soil covering technique with microcosm experiment. Three different chemical amendments, lime stone (LS), steel slag (SS), and acid mine drainage sludge (AMDS), were examined and varied soil covering depth, 20, 30, 40cm, was applied to determine optimum remediation technique. Bioavailable heavy metal concentration in soil and total concentration of heavy metals in crop were monitored. Result showed that average heavy metal concentration in varied soil covering depth was ordered as 40 cm ($14.5mg\;kg^{-1}$) < 20 cm ($14.6mg\;kg^{-1}$) < 30 cm ($16.0mg\;kg^{-1}$) and also heavy metal concentration in crop was ordered as 40 cm ($100{\mu}g\;kg^{-1}$) < 30 cm ($183{\mu}g\;kg^{-1}$) < 20 cm ($190{\mu}g\;kg^{-1}$). In terms of chemical amendments, average heavy metal concentration was decreased as AMDS ($150{\mu}g\;kg^{-1}$) < SS ($151{\mu}g\;kg^{-1}$) < LS ($154{\mu}g\;kg^{-1}$). Overall, depth of soil covering should be over 30 cm to minimize bioaccumulation of heavy metals and SS and LS could be applied in heavy metal contaminated soil for remediation purposes.