러시아 석유산업의 구조 변화와 푸틴 정부의 석유정책

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.

Growth Inhibition of Colon Cancer through Inactivation of STAT3 Pathway by IL-10 and IL-1ra Released from Murine Macrophage

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

권역심뇌혈관질환센터 사업의 비용-편익 분석

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 Effects of Di(n-butyl)phthalate on Development of Female Reproductive Organs and Steroidogenesis

HONG Jin Hwan,KIM Tae Sung,KANG Tae Seok,KANG Ho II,MOON Hyun Ju,KANG II Hyun,JEON Young Shin,CHOI Eun Hee,RYU Hae Won,HONG Jin Tae 大韓藥學會 2006 大韓藥學會 總會 및 學術大會 Vol.2006 No.1

Influence of MoS₂ Nanosheet Size on Performance of Drilling Mud

Sung Hyun Hong,Hae Jin Jo,Min-Ju Choi,Ho Won Jang,Young Ju Kim,Wook Ryol Hwang,Soo Young Kim 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.5

Water-based drilling mud (WBM) is a non-Newtonian fluid that has a variety of applications such as in transporting cutting during drilling, protecting the borehole, and cooling the drill bit. With the development of nano-technology, various nanoparticles have been synthesized and have been added to WBM to improve its performance. Shear thinning is the most important factor in drilling mud and this attribute can be improved when two-dimensional particles are added. MoS₂ nanoparticles, which represent a typical two-dimensional material, are easy to synthesize in large quantities and have a high thermal conductivity and low coefficient of friction. Since the two-dimensional structure, thermal conductivity, and low coefficient of friction of MoS₂ would improve the performance of WBM, we experimented with MoS₂ nanosheets as an additive, under optimal conditions, using various samples each with uniform sizes and thickness of nanosheets. A large amount of MoS₂ nanosheets was synthesized, sorted by thickness and diameter, and added to drilling mud. The diameter of MoS₂ was divided into a small diameter group (about 100-400 nm) and a big diameter group (about 300-650nm), and the thickness was divided into 1-2 nm and 5-10 nm groups. Experimental results showed that when MoS₂ is added to WBM, shear thinning occurs more strongly. In addition, the addition of MoS₂ with a thickness of 1-2 nm and a diameter of 300-650 nm resulted in the highest increase in viscosity and thermal conductivity of WBM. As a result, we experimentally confirmed that MoS₂ can be used as an additive to increase the thermal conductivity and viscosity of WBM and to make shear thinning phenomenon more.

Fabrication of Novel Thin Film Diode with Multi-step Anodic Oxidation and Post Heat-treatment

Hong, Sung-Jei,Lee, Chan-Jae,Moon, Dae-Gyu,Kim, Won-Keun,Han, Jeong-In The Korean Institute of Electrical and Electronic 2002 Transactions on Electrical and Electronic Material Vol.3 No.4

Thin film diode with reliable interfacial structure was fabricated by using multi-step anodic oxidation. The thickness of the oxide layer was preciously controlled with anodic voltage. Also, interfacial structure between oxide layer and top electrode was improved by applying post heat-treatment. The thin film diode showed symmetric and stable I-V characteristics after the post heat-treatment.

3GPP 무결성 알고리즘 f9의 증명가능 안전성

Hong, Do-won,Shin, Sang-Uk,Ryu, Heui-su,Chung, Kyo-Il Korea Information Processing Society 2002 정보처리학회논문지 C : 정보통신,정보보안 Vol.9 No.4

3GPP의 비동기식 IMT-2000 시스템의 보안 구조에는 표준 무결성 알고리즘 f9가 있다. f9는 비동기식(W-CDMA) IMT-2000의 무선 구간에서 데이터 무결성과 시그널링 데이터의 출처를 인증하기 위한 메시지 인증 코드(MAC)를 계산하는 알고리즘으로 블록 암호 KASUMI에 기반한 CBC-MAC의 변형이다. 이 논문은 f9의 증명 가능한 안전성을 제공한다. 기반이 되는 블록 암호가 유사 랜덤 순열이면 어떤 공격자에 대해서도 f9가 안전함을 증명한다. Within the security architecture of the 3GPP system there is a standardised integrity algorithm f9. The integrity algorithm f9 computes a MAC to authenticate the data integrity and data origin of signalling data over a radio access link of W-CDMA IMT-2000. f9 is a variant of the standard CBC MAC based on the block cipher KASUMI. In this paper we provide the provable security of f9 We prove that f9 is secure by giving concrete bound on an adversary's inability to forge in terms of her inability to distinguish the underlying block cipher from a pseudorandom permutation.

Isolation and Partial Characterization of Phytotoxic Mycotoxins Produced by Sclerotinia sp., a Potential Bioherbicide for the Control of White Clover(Trifoliorum repens)

Hong, Yeon-Kyu,Lee, Bong-Choon,Jung, Won-Kwon,Bae, Soon-Do,Park, Sung-Tae,Uhm, Jae-Youl The Korean Society of Plant Pathology 2004 Plant Pathology Journal Vol.20 No.1

Sclerotinia sp. (isolate BWC98-105) causes stem blight and root rot in Leghum sp., and is presently being evaluated as a potential mycoherbicide for the control of Trifoliorium repens. Bioassays have shown that Sclerotinia sp. produces phytotoxic substance which is biologically active against T. repens. Two biologically active compounds, designated as compoundsI and II, were produced in vitro from the culture filtrate of BWC98-105 isolate Sclerotium sp. Compounds I and II were purified by means of liquid-liquid extraction and $C_{18}$ open column chromatography (300 ${\times}$ 30 mm, i.d). To determine the purity, the purified compounds were analyzed by RP-HPLC. The analytical RP-HPLC column was a TOSOH ODS-120T (150 ${\times}$ 4.6 mm i.d, Japan), of which the flow rate was set at 0.7 mL/min using the linear gradient solvent system initiated with 15 % methanol to 85 % methanol for 50 min with monitoring at 254 nm. Under these RP-HPLC conditions, compounds I and II eluted at 3.49 and 4.13 min, respectively. Compound II was found to be most potent and host specific. However, compound I had a unique antibiotic activity against phytopathogenic bacteria like bacterial leaf blight (Xanthomonas oryzae) on rice, where it played a less important role in producing toxicity on T. repens. No toxin activity was detected in the water fraction after partitioning with several organic solvents. However, toxin activity was detected in the ethyl acetate and butanol fractions. In the leaf bioassay using compound II, the disease first appeared within 4-5 h as water soaked rot, which subsequently developed into well-defined blight affecting the whole plant.

Quantum confined Y2O3:Eu3+ nanophosphor fabricated with pre-dissipation treatment

Sung-Jei Hong,한정인,Kyung-Cheon Son,Min-Gi Kwak,Seung-suk Choi,Won-Keun Kim 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.3

In this paper, we fabricated and characterized a novel Y2O3 : Eu3+ nanophosphor. The phosphor consists of Y2O3 nanoparticles conning an Eu. For fabricating the nanophosphor, a precursor of the quantum-conned particle was synthesized by mixing yttrium acetylacetonate and europium acetate. The synthesized precursor was dissipated into organic solvent to prevent agglomeration, and the nanophosphor was fabricated on a silicon wafer, followed by heat treatment at 500, 700, and 900 C, respectively. High-resolution transmission-electron-microscope (HRTEM) observation showed that the mean particle sizes after heat treatment at the dierent temperatures were 4, 20, and 30 nm, respectively. Also, X-ray diraction (XRD) analysis indicated that the crystal structure was mainly a cubic structure with a small amount of monoclinic structure. Energydispersion spectroscopy (EDS) revealed that the Eu component in the 4 nm-sized-quantum-conned nanophosphor was uniformly distributed within 0.4 wt.% deviation. Also, the photoluminescence properties, excitation and emission wavelengths of the quantum-conned nanophosphor, were 250 and 611 nm, respectively. In this paper, we fabricated and characterized a novel Y2O3 : Eu3+ nanophosphor. The phosphor consists of Y2O3 nanoparticles conning an Eu. For fabricating the nanophosphor, a precursor of the quantum-conned particle was synthesized by mixing yttrium acetylacetonate and europium acetate. The synthesized precursor was dissipated into organic solvent to prevent agglomeration, and the nanophosphor was fabricated on a silicon wafer, followed by heat treatment at 500, 700, and 900 C, respectively. High-resolution transmission-electron-microscope (HRTEM) observation showed that the mean particle sizes after heat treatment at the dierent temperatures were 4, 20, and 30 nm, respectively. Also, X-ray diraction (XRD) analysis indicated that the crystal structure was mainly a cubic structure with a small amount of monoclinic structure. Energydispersion spectroscopy (EDS) revealed that the Eu component in the 4 nm-sized-quantum-conned nanophosphor was uniformly distributed within 0.4 wt.% deviation. Also, the photoluminescence properties, excitation and emission wavelengths of the quantum-conned nanophosphor, were 250 and 611 nm, respectively.