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.

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.

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

SL 무기질 바닥재의 경제성 분석에 관한 연구

박호근 ( Ho Geun Park ),홍성욱 ( Seong Wook Hong ),양재영 ( Je Yong Yang ),김상원 ( Sang Won Kim ),신찬호 ( Chan Ho Shin ),최민권 ( Min Kwon Choe ) 한국건축시공학회 2011 한국건축시공학회 학술발표대회 논문집 Vol.11 No.1

This study is concerned with the development of the SL inorganic floor covering. First, volatile organic compounds, inorganic test profile on the SL through the flooring is environment-friendly inorganic noncombustible floor finishes the event of fire toxic gases (such as volatile organic compounds) emissions have been identified as not at all. Second, SL-breathable material, the concrete floor to prevent aging, long life, which are three levels of noise, shock-absorbing function was decreased. Third, SL economic analysis of mineral flooring terrazzo tile floors compared with the normal material. On a terrazzo tile cost 13,500 won ~ 24,500 won, but It have found that, in terms of labor SL 36,899 won ~ 38,899 won flooring mineral balance. Occurs in the total amount when compared with terrazzo tile floors and 25,399 won 3T, 5T and economical analysis concludes that the original 12,399 won.

석재 또는 외장타일 건식 알루미늄 트러스 설치공법의 시공에 관한 연구

이영래 ( Young Lae Lee ),홍성욱 ( Seong Wook Hong ),도선붕 ( Sun Boong Doh ),김상원 ( Sang Won Kim ),안용선 ( Yong Sun Ahn ) 한국건축시공학회 2012 한국건축시공학회 학술발표대회 논문집 Vol.12 No.1

Steel method compared with conventional aluminum truss construction materials as the biggest difference, aluminum truss method by using an aluminum material construction of the existing steel truss compared with the welding operation is omitted, as the air operations will be reduced by about 40% do not need skilled workers in the existing portion of each tube and cost 11,233 to 13,173 won/㎡ cheap it was found.

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 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.

Longevity of cross-linked hyaluronic acid filler depending on injection depth: in vivo study using small animal model

( Sang Hyung Lee ),( Woo Jin Lee ),( Hong Il Cho ),( Kwang Hee Won ),( Sung Eun Chang ),( Mi Woo Lee ),( Jee Ho Choi ),( Kee Chan Moon ),( Chong Hyun Won ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2

Background: Presenting study estimate the degradation of hyarulonic acid (HA) filler in vivo using rat model to evaluate the longevity of HA fillers depending on injection depth. Objectives: This quantitative analysis demonstrated that HA filler has a longer longevity when injected in deep layer of tissue. Methods: Each 3 Sprague-Dawley rats were assigned to groups based on the sampling timepoints. Four intradermal injections on the one side of back plus four subcutaneous injections on the other side of back of rats was made. Histologic specimens from injected site were obtained at 2 weeks, 5 weeks, 9 weeks, 13 weeks, 20 weeks and 33 weeks after initial implantation. Volumetric analysis using histologic specimen was performed. Results: Volumetric analysis with histologic specimen demonstrated the difference in degradation rate depending on injection depth. Although volume ratio decreased over time in subdermal injection site, subdermal injected site maintained a greater volume ratio than it of intradermal injection site for the duration of the experiment. Time to half of original implant volume was 13 weeks (intradermal site) and 20 weeks (subdermal site) after initial injection, respectively. Conclusion: Presenting study is the first to demonstrate histological change of implanted HA filler materials over time and compare the duration of materials depending on injection depth.

Basic, HCC basic : O-035 ; ADAM17 induce the radiation therapeutic effects through inhibition of CD133 progenitor cell metastasis in HCC

( Sung Woo Hong ),( Won Hee Hur ),( Jung Eun Choi ),( Young Ki Lee ),( Seung Kew Yoon ) 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.1

Background: Recent studies have described that cancer stem cell plays a key role in radioresistance. The cell surface marker CD133 has been known recently as a cancer stem cell marker expressed in HCC. Recently, ADAM17 was reported to contribute to metastasis. The aim of this study is to investigate the molecular and cellular mechanisms of liver cancer stem cell and ADAM17 in metastasis after irradiation in HCC. Methods: Huh-7CD133+ and Huh-7CD133- sorted cells were exposed to g-irradiation. We investigated the key gene/pathway responsible for metastasis in post-irradiated liver cancer stem cells, CD133+/- cells using cDNA microarray. Metastatic activity was analyzed by cell migration assay. Also the expressions of the MMP-2 and MMP-9 were measured by gelatin zymography. We confirmed ADAM17 gene expression on time dependent by real-time PCR, western blot in sorted cells. ADAM17 is suppressed effectively using ADAM17 lenti virus shRNA in Huh-7 cell line. CD133+/- cells that were suppressed ADAM17 gene expression were analyzed migration activity. Results: After cDNA microarray analysis, eighty nine metastasis related genes were upregulated. Especially we found that the ADAM17 gene was more increased in CD133+ cells than CD133- cells treated with g-irradiation. In addition CD133+ cells from radiation exposure were consistently expressed higher levels of vascular endothelial growth factor by Multiplex cytokine analysis. After irradiation, CD133+ cells migrated more actively, and showed an increased invasion rate compared to CD133- cell. Gelatin zymography showed that MMP-2, -9 expressions are significantly higher in CD133+ cells. Furthermore, shADAM17CD133+ cells reduced migration activity after g-irradiation exposure. Conclusions: These results suggest that CD133+ cells have more metastatic capacity than CD133- cells after treating irradiation. These data further suggest that molecular therapeutic inhibition of cell migration and invasion through ADAM17 suppression may represent a new approach for improving the therapeutic efficacy of radiotherapy for HCC. This work was funded by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0027071).

Liver Imaging : Sonography of hepatic hemangioma accompanied by arterioportal shunt

( Sang Hyun Choi ),( Kyoung Won Kim ),( Gil Sun Hong ),( So Jung Lee ),( So Yeon Kim ),( Jong Seok Lee ),( Hyoung Jung Kim ) 대한간학회 2014 Clinical and Molecular Hepatology(대한간학회지) Vol.20 No.1

Association between cardiovascular diseases and systemic treatments of psoriasis: a Korean nationwide cohort study

( Sung Min Kim ),( Ji Su Lee ),( Ji Youn Hong ),( Jin Hee Kim ),( Joo Ran Hong ),( Hye In Cheon ),( Min Seok Hur ),( Yang Won Lee ),( Yong Beom Choe ),( Kyu Joong Ahn ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2

Background: Psoriasis is an inflammatory disease, characterized by erythematous papules or plaques with white scale. Risk of cardiovascular diseases is elevated in patients with psoriasis, and systemic treatments of psoriasis may lower cardiovascular events. Objectives: This study was aimed to assess the association between the rates of cardiovascular diseases and systemic treatments of psoriasis. Methods: This nationwide population-based cohort study analyzed the data of patients with psoriasis using National Health Insurance Service Database. The database was collected from 2006 to 2018 in Korea and a total of 1,201,778 patients with psoriasis over 20 years old were included. In this study, the patients who have never received systemic therapy were defined as mild. The patients were classified as moderate to severe, if they had received any systemic treatments such as methotrexate, cyclosporine, acitretin, phototherapy, or biologics. Results: Overall cumulative incidences for major adverse cardiovascular events (MACEs) were 7.00, 3.17, 2.37, 0.83, and 3.61 for cyclosporine, methotrexate, phototherapy, biologics, and mild group, respectively. Conclusion: The therapeutic modalities in psoriasis were related to cardiovascular outcomes in this study. Methotrexate, phototherapy, and biologics tend to lower the rate of cardiovascular events. The randomized trials are needed to evaluate the effectiveness of systemic antipsoriatic treatments and cardiovascular safety.