c-형강 및 ebb & flow 방식에 따른 경제성 분석

강승원(Seung Won Kang),박천호(Chun Ho Pak),조용성(Yong Sung Cho) 한국원예학회 2007 원예과학기술지 Vol.25 No.3

관비재배와 저면관수인 ebb & flow, C-형강의 재배방식에 따른 고품질분화 생산을 위한 재배농가의 경제성을 분석하였다. 이를 위해 화훼농가의 비용구조를 분석하였고 자본 회수기간 및 내부수익률의 추정, 관수에 따른 인건비 절감 효과를 분석하여 재배방식에 따른 경제성을 비교하였다. 10a(991.7m²) 규모의 자동온실에 대해 관비재배방식을 선택한 시클라멘 재배농가의 총 비용은 9,993.8만원으로 추정되며, 이 중 시설비는 74%(7,410만원)를 점하고 연간 2,583.8만원의 경영비를 지출할 것으로 예상된다. 반면, C-형강방식을 선택한 재배농가는 초기 시설비용으로 약 8,520.0만원(총비용의 약 70%)을 지출하고, 매년 경영비로 3,597.0만원을 지출할 것으로 추정된다. 한편, 투자자금에 대한 자본회수 기간을 분석한 결과 10a 규모의 자동온실에서 시클라멘을 재배하는 농가에서 관비재배방식 혹은 C-형강방식을 선택할 경우에는 초기시설투자비 회수기간이 약 4 년 정도 소요될 것으로 예측되며, ebb & flow 방식을 선택할 경우에는 약 5년 정도의 시간이 소요될 것으로 예상된다. 또한, 내부 수익률을 추정한 결과 ebb & flow시설과 C-형강시설을 5년과 6년씩 사용한다고 가정할 경우, ebb & flow시설의 내부 수익률은 각각 9%와 14%로 나타났고, C-형강시설의 경우에는 각각 13%와 17%로 나타나 시중의 저축성예금 수신금리 4.82%와 비교하여 경제성이 높은 것으로 분석되었다. Economical efficiency for production of high quality-potted plants was analyzed by types of irrigation system such as conventional fertigation, ebb & flow, and C-channel as subirrigation systems. After cost structure was analyzed, payback period of capital, internal rate return (IRR), and effects of reduced labor cost were estimated. The gross cost of cyclamen-producing farmers using hydroponic systems in automated greenhouses (10a) was about 100 million won. Of the gross cost, installation and operation costs occupied 74% and 25%, respectively. In the C-channel subirrigation system, gross cost was 120 million won approximately. Installation and operation costs occupied 70% and 30%, respectively. Payback period of capital was 4 years for fertigated irrigation and C-channel subirrigation system, whereas it was 5 years for ebb & flow. IRR of ebb & flow and C-channel subirrigation systems was higher than the interest rates of 4.82%, indicating economic efficiency.

Impact of Interferon-Based Treatment on Quality of Life and Work Related Productivity from the Korean Cohort in the MOSAIC Study

( Sang Hoon Ahn ),( Won Hyeok Choe ),( Yoon Jun Kim ),( Jeong Heo ),( Dorota Latarska-smuga ),( Jiho Kang ),( Seung Woon Paik ) 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1

Aims: Chronic Hepatitis C Virus (HCV) infection increases the risk for progressive liver disease, hepatocellular carcinoma and negatively impacts the patient’s quality of life. HCV treatment is evolving with direct acting antivirals but IFN based therapy has been the standard of care for many years and remains available in some countries. The MOSAIC study aims to characterize patients with chronic HCV infection and assess the impact of IFN-containing treatment on health-related quality of life, work related productivity and health care utilization. Methods: MOSAIC is an international prospective multicenter observational study that has been conducted in 20 countries. Consecutive patients with chronic HCV infection were enrolled and those who initiated an IFN based regimen were prospectively followed for 48 weeks. We report results from the Korean cohort Results: 100 patients were enrolled: 86 were treatment naïve and 14 were treatment experienced. 33 patients initiated an IFN based regimen: 6 patients started IFN + RBV, 26 patients started Peg-IFN + RBV, none started Peg-IFN + RBV + DAA and 1 patient received other treatment. Among the treated cohort, demographic and disease characteristics were the following: the mean age was 54.5 years; 14 patients were male. 14 had minimal or no fibrosis, 2 portal fibrosis, 3 bridging fibrosis and 6 patients suffered from cirrhosis. HCV Genotype distribution was as follows: genotype 1: 11; genotype 2: 19 and genotype 3: 3. Table 1 describes the results at baseline and changes over 4, 12 and 48 weeks and end-of-treatment (EOT) for the quality of life and work productivity outcome measures (EQ-5D-5L, HCV-PRO and WPAI). Conclusions: Results from the Korean cohort of the MOSAIC study show a moderate trend for deterioration of health-related quality of life and work productivity associated with IFN based treatment for patients with chronic HCV infection during treatment period. Acknowledgements: The design, study conduct, analysis, and financial support of MOSAIC study were provided by AbbVie. AbbVie participated in the interpretation of data, review, and approval of the content of the abstract. All authors had access to all relevant data and participated in writing, review, and approval of this abstract. Medical writing support was provided by Olivier Van de Steen of Medeor-consulting, funded by AbbVie. Disclosures: Sang Hoon Ahn: served as an advisor and lecturer for Bristol-Myers Squibb, Gilead Sciences, F.Hoffmann-La Roche, Merck, AbbVie, and has received unrestricted grants from Bristol-Myers Squibb, Gilead Sciences, and F. Hoffmann-La Roche for investigator- initiated trials Won Hyeok Choe: Nothing to disclosure Yoon Jun Kim: Nothing to disclosure Jeong Heo: received a grant from GSK; Research support from BMS, and Roche; Advisor for Abbvie, BMS, Gilead Sciences, Pharma Essentia, SillaJen, and Johnson & Johnson. Dorota Latarska-Smuga, Jiho Kang: are employees of AbbVie, Inc. and may hold stock or stock options. Seung Woon Paik: received grant and research support from AbbVie, BMS, Gilead, GSK, Merck, Novartis, and Roche

A Study on the Optimal Rotor Design of LSPM Considering the Starting Torque and Efficiency

Won-Ho Kim,Ki-Chan Kim,Seung-Joo Kim,Dong-Woo Kang,Sung-Chul Go,Hyung-Woo Lee,Yon-Do Chun,Ju Lee IEEE 2009 IEEE transactions on magnetics Vol.45 No.3

<P>This paper presents the optimal rotor design method in a single-phase line-start permanent magnet motor (LSPM) considering the starting torque and efficiency. To consider nonlinear characteristics, the design process is comprised of the FEM and analytical method. During this study, permanent-magnets and cage bars were designed using the magnetic equivalent circuit method and the barriers that control all magnetic flux were designed using the FEM, and the tradeoff of starting torque and efficiency is controlled by weight function in Taguchi method simulation. Finally, the performance of the optimal model is compared with those of conventional models.</P>

액상 플라즈마 스퍼터링 방식을 이용한 실버 나노파티클의 합성

Seung-Cheol Yoo,Se-jin Jung,Ji-young Han,Hyun-il Kang,Won Seok Choi 한국진공학회 2017 한국진공학회 학술발표회초록집 Vol.2017 No.2

Symbiotic Relationship between Microbacterium sp. SK0812 and Candida tropicalis SK090404

Seung Won Kang,전보영,황태식,박두현 한국미생물학회 2009 The journal of microbiology Vol.47 No.6

A bacterium growing inside yeast cytoplasm was observed by light microscope without staining. The bacterium was separately stained from yeast cell by a fluorescent dye, 4′,6-diamidino-2-phenylindole (DAPI). The bacterium actively moved inside yeast cytoplasm and propagated in company with the yeast growth. The bacterium was separated from the yeast cytoplasm by selective disruption of yeast cells and the yeast without the intracellular bacterium (YWOB) was obtained by selective inactivation of bacterial cells. The yeast and the intracellular bacterium were identified as Candida tropicalis and Microbacterium sp., respectively. The length of Microbacterium sp. and C. tropicalis measured with SEM image was smaller than 0.5 μm and was larger than 5 μm, respectively. The yeast with the intracellular bacterium (YWIB) grew in a starch-based medium but the YWOB was not C. tropicalis has neither extracellular nor intracellular saccharification enzyme. Glucose was produced from starch by the extracellular crude enzyme (culture fluid) of Microbacterium sp. YWIB produced significantly more ethanol from glucose than YWOB but did not from starch. Conclusively, C. tropicalis is thought to catabolize starch dependent upon Microbacterium sp. growing in its cytoplasm and furnish stable habitat for the Microbacterium sp.

Microstructure of interfacial reaction layer in Sn–Ag–Cu/electroless Ni (P) solder joint

Kang, Han-Byul,Bae, Jee-Hwan,Yoon, Jeong-Won,Jung, Seung-Boo,Park, Jongwoo,Yang, Cheol-Woong Springer-Verlag 2011 Journal of materials science. Materials in electro Vol.22 No.9

HCV, Alcoholic : O-022 ; Hepatitis C virus infection enhances tumor necrosis factor-alpha-induced cell death via suppression of nuclear factor-kappaB

( Won Seok Kang ),( Jun Seong Park ),( Seung Wook Ryu ),( Woo Il Kim ),( Dong Yeop Chang ),( Dong Ho Lee ),( Do Youn Park ),( Youn Hee Choi ),( Kyung Sun Choi ),( Kwang Hyub Han ),( Chul Hee Choi ),( 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.-

Background: Hepatitis C virus (HCV) infection results in liver injury and long-term complications such as liver cirrhosis and hepatocellular carcinoma. Liver injury in HCV infection is believed to be caused by host immune responses, not by viral cytopathic effects. Tumor necrosis factor-α (TNF-α) plays a pivotal role in the inflammatory processes of hepatitis C. TNF-α induces cell death that can be ameliorated by nuclear factor kappaB (NF-κB) activation. We investigated the regulation of TNF-α signal transduction in HCV-infected cells and identified HCV proteins responsible for sensitization to TNF-α-induced cell death. Methods: We studied the effect of HCV infection on TNF-α signal transduction using an in vitro HCV infection model (JFH-1, genotype 2a) with Huh-7 and Huh-7.5 cells. Results: We found that TNF-α-induced cell death significantly increased in HCV-infected cells. HCV infection diminished TNF-α-induced phosphorylation of IKK and IκB, which are upstream regulators of NF-κB activation. HCV infection also inhibited nuclear translocation of NF-κB and expression of NF-κB-dependent anti-apoptotic proteins such as Bcl-xL, XIAP and c-FLIPL. Decreased levels of Bcl-xL, XIAP, and c-FLIP mRNA and protein were also observed in livers with chronic hepatitis C. Transfection with plasmids encoding each HCV protein revealed that core, NS4B, and NS5B attenuated TNF-α-induced NF-κB activation and enhanced TNF-α-induced cell death. Conclusions: HCV infection enhances TNF-α-induced cell death by suppressing NF-κB activation, through the action of core, NS4B, and NS5B. This mechanism may contribute to immune-mediated liver injury in HCV infection.

Efficiency of in vitro follicle growth using autopsied rhesus monkey ovaries

Seung-Yup Ku,Yoon Young Kim,Jae Hoon Ahn,Jun Won Yoon,Jong Min Kim,Chung Gyu Park,Byeong Cheol Kang 한국실험동물학회 2016 한국실험동물학회 학술발표대회 논문집 Vol.2016 No.2

Measurement of Moisture Content of Mixed Root Media Using a Soil Moisture Sensor

Seung Won Kang,Chun Ho Pak 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Is Weight Change after Acute Myocardial Infarction Beneficial?

( Won Yu Kang ),( Seung Hwan Hwang ),( Sun Ho Hwang ),( Wan Kim ),( Keun Ho Park ),( Young Joon Hong ),( Ju Han Kim ),( Youngkeun Ahn ),( Myung Ho Jeong ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.1

Background: Obesity is a well-established risk factor for many chronic disorders. However, the effect of weight change after acute myocardial infarction (AMI) is not well known. Methods: Among consecutive patients who underwent percutaneous coronary intervention (PCI) between November 2005 and November 2007 due to acute myocardial infarction (AMI), patients who were overweight (23.0≤BMI<27.5 kg/㎡, n=341) and obese (BMI≥27.5 kg/㎡, n=80) were selected for analysis. According to weight change, patients were divided into 4 groups: Group I (weight loss>5%, n=61), Group II (0% weight loss≤5%, n=133), Group III (0%≤weight gain<5%, n=181), and Group IV (weight gain≥5%, n=46). We assessed association between weight change and major cardiac adverse events (MACE). Results: Greater weight loss was more frequent among older individuals (Group I: 64.1±12.4, II: 60.6±12.1, III: 59.0±11.9, IV: 61.4±10.6 years, p=0.028) and diabetics (Group I: 34.4%, II: 27.1%, III: 21.2%, IV: 15.2%, p=0.009). However, there were no significant differences in distributions of other baseline characteristics including hypertension, dyslipidemia, smoking, and gender among groups, or in angiographic and procedural factors including lesion characteristics, procedural success, target lesion location, number of stents used, and stent size, except for proportions of patients with three-vessel disease, which were higher in patients with weight loss (Group I: 20.8%, II: 23.0%, III: 12.5%, IV: 11.6%, p=0.005). The group with greater weight loss had the highest MACE rate at 12 month clinical follow-up (Group I: 36.9%, II: 25.0%, III: 25.9%, IV: 17.3%, p=0.020). Conclusions: Although weight loss after MI appears to be associated with worse outcomes, it remains unclear whether the effect is of cardiac origin. Further prospective study is needed to elucidate the effect of intentional weight reduction after MI.