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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.
바이오매스 합성가스를 이용한 엔진 발전 시스템의 경제성 평가
문지홍(Ji Hong Moon),이정우(Jeung Woo Lee),방병열(Byung Ryeul Bang),김세원(Se Won Kim),이은도(Uen Do Lee) 한국열환경공학회 2010 한국열환경공학회 학술대회지 Vol.2010 No.추계
Biomass, a carbon neutral fuel, is one of the fastest growing renewable energy sources. In this study, economic feasibility of small scale power generation system using syngas from biomass has been investigated. Effects of important variables such as capital investment, cost of waste wood, renewable energy certificate(REC), system marginal price(SMP) on the benefit of business have been analyzed. Internal rate of return(IRR) was predicted as 16.90%, which implicates the business is promising based on the assumptions such as SMP of 137 Won/kWh, capital cost of 4.7 billion won, and waste wood price of 30 thousand won. Major factors affecting the benefit of business are as follows; system marginal price, operational rate, capital investment, expenditure of waste wood, certified emission reduction.
김범규,황도현,윤홍주,서원찬,Kim, Bum-Kyu,Hwang, Do-Hyun,Yoon, Hong-Joo,Seo, Won-Chan 한국전자통신학회 2015 한국전자통신학회 논문지 Vol.10 No.5
This study carried out in order to investigate the most basic elements of suitability selection methods for composition of artificial reef. Acquired data by in-situ measurements and satellite remote sensing analysed in applying GIS. To identify the characteristic of marine environment around the West Sea, the South Sea and the East Sea of Korea, physical conditions-seabed sediment and depth, biological conditions-chlorophyll-${\alpha}$, chemical conditions-Sea Surface Temperature(SST) and DO were used. Suitable sites for artificial reef are selected Taean Peninsula, Geoje, Wando, Pohang, Seocheon, etc. From now on, it will be helpful to effectively utilize artificial reef as well as construct synthetic database. It is also expected to use basic data for artificial reef facilities management. 본 논문는 인공어초 조성의 가장 기본적인 요소인 적지선정을 위한 방법에 대해 고찰하였다. 현장관측과 위성 원격탐사(Remote Sensing, RS)로 획득한 자료를 지리정보시스템(Geographic Information System, GIS)을 활용하여 분석하였다. 한반도 주변해역의 해양환경 특성을 파악하기 위해 물리적 조건-해저저질, 수심, 생물적 조건-클로로필-${\alpha}$, 화학적 조건-해수온, DO를 활용하였다. 인공어초 적지로는 태안반도, 거제, 완도, 포항, 서천 등이 나타났다. 향후 본 연구는 인공어초 설치의 효율적인 활용뿐만 아니라 종합적인 데이터베이스의 구축에 도움을 줄 수 있을 것이다. 또한 인공어초 시설관리의 기초자료로 활용할 수 있을 것으로 기대된다.
( Won-yong Song ),( Yong-seok Song ),( Hyung Won Ryu ),( Sei-ryang Oh ),( Jintae Hong ),( Do-young Yoon ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.1
In the human airway, mucus exists to protect the respiratory system as a primary barrier of the innate immune system. However, hyperexpressed mucus limits airflow, resulting in a decrease of lung function. Among more than 20 mucin family members, MUC5AC and MUC5B are major glycoproteins in human airway mucus. The epidermal growth factor receptor (EGFR) signaling pathway is one of the mechanisms of these mucins expression and specificity protein-1 (Sp1) transcription factor is the downstream signal of this pathway, playing pivotal roles in mucin expression. Even though there are some drugs for treating mucus hypersecretion, no drug has proven effects on humans. We found that the flavonoid tilianin regulated MUC5AC expression and also inhibited Sp1 phosphorylation. In this study, we investigated how tilianin would modulate EGFR signaling and regulate mucin production. In conclusion, tilianin inhibited MUC5AC expression mediated via modulating the EGFRMEK- ERK-Sp1 signaling pathway in NCI-H292 human airway epithelial cells. This study may provide the basis for the novel treatment of mucus hypersecretion.
Hong, Seongin,Yoo, Geonwook,Kim, Dong Hak,Song, Won Geun,Le, Ong Kim,Hong, Young Ki,Takahashi, Kaito,Omkaram, Inturu,Son, Do Ngoc,Kim, Sunkook WILEY‐VCH Verlag Berlin GmbH 2017 Physica status solidi. PSS. C, Current topics in s Vol.14 No.3
<P>Seongin Hong et al. (article no. <url href='http://doi.wiley.com/10.1002/pssc.201600262'>1600262</url>) have investigated the polyethylenimine (PEI) doping mechanism and its effect on the electrical and optical properties of multilayer MoS<SUB>2</SUB> field effect transistors (FETs). Density functional theory (DFT) calculation and X‐ray photoelectron spectroscopy (XPS) measurement confirm that the PEI molecules were successfully doped and formed Mo–N bonds on the MoS<SUB>2</SUB> channel, generating new energy states near the valence band. The strong n‐doping changed the threshold voltage as well as the Schottky barrier width attributed to the induced interfacial dipoles. Therefore, the ON‐current of the doped MoS<SUB>2</SUB> FETs was improved in comparison with the pristine FETs. Furthermore, the PEI doping also enhanced the photoresponsivity of the MoS<SUB>2</SUB> FETs from 0.14 A/W to 4.41 A/W. This study suggests that PEI molecular doping could be widely applicable to two‐dimensional materials in order to improve the electrical and optical properties of respective devices.</P>
( Won Woo Lee ),( Ji Sun Park ),( Hyun Jin Do ),( Dae Gyun Woo ),( Han Na Yang ),( Jae Hwan Kim ),( Keun Hong Park ) 한국조직공학과 재생의학회 2008 조직공학과 재생의학 Vol.5 No.1
Injectable hydrogel with growth factor was fabricated and investigated as a delivery vehicle of mouse embryonic stem cells(mES) for neocartilage formation. To determine the optimal growth factor in injectable hydrogel, we evaluated the GAG/DNA assay, RT-PCR analysis, and histology. GAG/DNA assay showed that TGF-β 3 enhanced the secretion of GAG content and proliferated well comparing to without TGF-β 3. RT-PCR results for the resultant cartilage tissue revealed that p(NiPAAm-co-AAc) hydrogels with TGF-β 3 was optimal for cartilage tissue formation in terms of collagen Type II and COMP gene expression and showed the results of histology and immunochemical histology.
Manifestations of Sasang Typology according to Common Chronic Diseases in Koreans
Hong, Seung Wan,Suh, Young Sung,Kim, Dae Hyun,Kim, Mi Kyung,Kim, Hye Soon,Park, Kyung Sik,Hwang, Jae Seok,Shin, So Jin,Cho, Chi Heum,Jung, Sung Won,Ha, Il Do,Kwon, Young Kyu Hindawi Limited 2018 Evidence-based Complementary and Alternative Medic Vol.2018 No.-
<P>Sasang typology is a traditional Korean medical classification scheme that combines medical management with general medicine and can be applied to chronic diseases. We aimed to analyze differences in Sasang Personality Questionnaire (SPQ) and Sasang Digestive Function Inventory (SDFI) results in patients with diabetes mellitus (DM), hypertension, functional dyspepsia, major depressive disorder (MDD), and adenomyosis. In this cross-sectional study, data were collected at a medical college hospital in South Korea. A total of 248 patients were included: 52 with DM, 47 with hypertension, 36 with functional dyspepsia, 26 with MDD, and 87 with adenomyosis. The subjects took both the SPQ and the SDFI. The outcome measures in this study were body mass index (BMI), SPQ score, and SDFI score. The DM and hypertension groups, which were expected to demonstrate many Taeeum-type traits, exhibited high BMI, high SPQ-Behavior and SDFI-Appetite scores, and low SPQ-Emotionality and SDFI-Digestion scores. The functional dyspepsia group showed low BMI and high scores for SPQ-Behavior, SPQ-Emotionality, SDFI-Digestion, and SDFI-Appetite. The MDD group demonstrated high SPQ-Emotionality and SDFI-Digestion scores, low BMI, and low SPQ-Behavior and SDFI-Appetite scores. The adenomyosis group demonstrated high scores for SPQ-Behavior, SDFI-Digestion, and SDFI-Appetite, low BMI, and low SPQ-Emotionality scores. Different characteristics distinguishing Sasang traits according to chronic diseases were ascertained, especially for Taeeum and Soeum types.</P>
MicroRNA signatures associated with thioacetamide-induced liver fibrosis in mice
Hong, Jae-Sang,Lee, Do-Hoon,Yook, Ye Won,Na, Dokyun,Jang, Yu Jin,Kim, Jong-Hoon,Lee, Young Sik Informa UK (TaylorFrancis) 2017 Bioscience, biotechnology, and biochemistry Vol.81 No.7
<P>Multiple etiologies of liver injury are associated with fibrosis in which the key event is the activation of hepatic stellate cells (HSCs). Although microRNAs (miRNAs) are reportedly involved in fibrogenesis, the complete array of miRNA signatures associated with the disease has yet to be elucidated. Here, deep sequencing analysis revealed that compared to controls, 80 miRNAs were upregulated and 21 miRNAs were downregulated significantly in the thioacetamide (TAA)-induced mouse fibrotic liver. Interestingly, 58 of the upregulated miRNAs were localized to an oncogenic miRNA megacluster upregulated in liver cancer. Differential expression of some of the TAA-responsive miRNAs was confirmed, and their human orthologs were similarly deregulated in TGF-1-activated HSCs. Moreover, a functional analysis of the experimentally validated high-confidence miRNA targets revealed significant enrichment for the GO terms and KEGG pathways involved in HSC activation and liver fibrogenesis. This is the first comprehensive report of miRNAs profiles during TAA-induced mouse liver fibrosis.</P>