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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.
권오상(Kwon Oh Sang),이기원(Lee Kee Won),손은일(Son Eun Il) 한국지역사회학회 2008 지역사회연구 Vol.16 No.4
Regional capacity building programs have been implemented since President Noh's government of 2002. Establishing Regional Innovation Councils and introduction of the New Vitalization Project(NVP) of rural cities and counties have been a starting point of regional capacity building programs. NVP projects focused on citizen training, village leader cultivation, bench marking of leading cities and counties, and activating community of practice(COP) rather than hardware projects. From year of 2005 to 2008, the budget of investment on softwares was 27 billion Korean Won. These projects have promoted citizens' participation and reflection of needs and demands of them. Oversea's leading projects are EU's LEADER programs and Master Programs in Germany. Domestically Grape Industry Leader Cultivation Program in Youngdong County is a standard model of connecting education and business. Increasing farm winery in connection with tourism, can promote wine related business and income of wine farm households of the county. In capacity building of local officials and citizens, action and innovation official programs can be developed by creativity levels. Citizen training programs also can be developed in area of basic knowledge training and moral education. In conclusion, Korea's regional capacity building programs are in need of continuing investment to catch up with leading countries' programs in same ares regardless of government transfer.
부산.경남지역의 일부 고등학교 교사들의 물리치료에 대한 인식도 조사
김지원,박상현,주성희,김용권,안덕현,Kim, JI-Won,Park, Sang-Hyeon,Joo, Sung-Hui,Kim, Yong-Kwon,Ahn, Duck-Hyun 대한물리치료과학회 2003 대한물리치료과학회지 Vol.10 No.2
This study randomly chose 10 humanity high schools, which are located in Busan and KyoungNam province. We then examined the recognition rate of physical therapy among 378 teachers who were and still are working in the schools. 1. The recognition grade of physical therapeutics between men and women was significantly different with results of 80.7% of men and 69.7% of women(p<0.05). In the case of experiencing physical therapy, 83.6% of people said they knew the physical therapeutics and in the case of the opposite side, the result was also significantly different with a result of 67.8%(p<0.05). 2. We ranked the people on how much they knew about the physical therapeutics among men and women. With men, the actual experience of physical therapeutic came before what they heard from other people. In the case of women, what they heard from other people came first and the actual experience of physical therapeutic came after. According to the public information from Inje University, the recognition grade is recorded in the 3rd grade department as 21.5% while in the case of experiencing treatment from a physical therapist, the result was 39.1%. In the other department (the 1st grade department), what men and women heard from mass media was recorded at 17.5% and what they heard from other people, it was recorded at 33.8%(p<0.05). 3. The research about the recognition of academic ability of being a physical therapist was that 55.6% of teachers thought that 3-year-college was the best, which made the results different from the recognition grade of the experience of education(p<0.05). 4. In the recognition grade of physical therapeutics, there were significantly differences from 50.2% of men and 45.2% of women were expecting about 1mil ion won to 1.99million won. In case of 25.2% of people who have experience less than 15years at work, they expected about 2million to 2.99million won. The figures were higher than 10.1% of people who have experiences over 15years. About the recognition grade of physical therapists social level in the future is 48.8% of people who had experienced of physical therapy and 63.8% of people who never had experienced of it said it would be better in the future. From these results, the recognition about physical therapeutics and the view of its social status are optimistic and they know well about the level of academic ability of physical therapists. On the other hand, most teachers don't know exactly about physical therapists work. So we have to inform them aggressively for enhancing the recognition of physical therapy because high school students are well affected by their teachers when they face their future or major in university.
Characteristics of Hydrogen-Plasma-Treated In0.5Ga0.5As Quantum-Dot Infrared Photodetector
Sung Ho Hwang Hwang,Doo Won Kwon,송진동,Jung Il Lee,최원준 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.III
The effects of hydrogen (H) passivation on the performance of an In$_{0.5}$Ga$_{0.5}$As/GaAs quantum-dot infrared detector (QDIP) have been investigated. After hydrogen (H) passivation, the device characteristics of QDIP were improved. The dark currents, which were thought to be caused by interfacial traps between quantum dots and GaAs, were noticeably decreased by 4 orders of magnitude at a positive bias voltage, and photoluminescence (PL) intensity was increased about 1.7 times by reducing non-radiative defect centers. Photo-response, which could not be observed in as-grown QDIP due to large dark currents and defects, was measured successfully with H passivation.
Cinnamon extract suppresses experimental colitis through modulation of antigen-presenting cells.
Kwon, Ho-Keun,Hwang, Ji-Sun,Lee, Choong-Gu,So, Jae-Seon,Sahoo, Anupama,Im, Chang-Rok,Jeon, Won Kyung,Ko, Byoung Seob,Lee, Sung Haeng,Park, Zee Yong,Im, Sin-Hyeog WJG Press 2011 WORLD JOURNAL OF GASTROENTEROLOGY Vol.17 No.8
<P>To investigate the anti-inflammatory effects of cinnamon extract and elucidate its mechanisms for targeting the function of antigen presenting cells.</P>
Kwon, Sung-Kyu,Kwon, Hyuk-Min,Kwak, Ho-Young,Jang, Jae-Hyung,Shin, Jong-Kwan,Hwang, Seon-Man,Sung, Seung-Yong,Lee, Ga-Won,Lee, Song-Jae,Han, In-Shik,Chung, Yi-Sun,Lee, Jung-Hwan,Lee, Hi-Deok The Institute of Electronics and Information Engin 2013 Journal of semiconductor technology and science Vol.13 No.6
In this paper, the 1/f noise characteristics of n-channel MOSFET (NMOSFET) and p-channel MOSFET (PMOSFET) are analyzed in depth as a function of body bias. The normalized drain current noise, $S_{ID}/I_D{^2}$ showed strong dependence on the body bias in the sub-threshold region for both NMOSFET and PMOSFET, and NMOSFET showed stronger dependence than PMOSFET on the body bias. On the contrary, both of NMOSFET and PMOSFET do not exhibit the dependence of $S_{ID}/I_D{^2}$ on body bias in strong inversion region, although the noise mechanisms of two MOSFETs are different from each other.
Kwon, Yong Min,Jang, Sung Ho,Lee, Jung Won Korean Academy of Rehabilitation Medicine 2015 Annals of Rehabilitation Medicine Vol.39 No.4
<P><B>Objective</B></P><P>To determine the predictability of motor evoked potentials (MEP) in patients with putaminal hemorrhage (PH) according to the time of MEP from the onset of stroke.</P><P><B>Methods</B></P><P>Sixty consecutive patients with PH from January 2006 to November 2013 were retrospectively reviewed. Motor function of affected extremities was measured at onset time and at six months after the onset. Patients were classified into two groups according to the time of MEP from the onset of stroke: early MEP group (within 15 days from onset) and late MEP group (16-30 days from onset). Patients were also classified into two groups according to the presence of MEP on the affected abductor pollicis brevis (APB): MEP (+) group-patients (showing MEP in the affected APB) and MEP (-) group-patients (no MEP in the affected APB). Motor outcome was compared between the two early and late MEP groups or between the presence and absence of MEP in the affected APB groups.</P><P><B>Results</B></P><P>For patients with MEP (+), a larger portion in the late MEP group showed good prognosis compared to the early MEP group (late MEP, 94.4%; early MEP, 80%). In contrast, in patients with MEP (-), a larger portion of patients in the late MEP group showed bad prognosis compared to the early MEP group (late MEP, 80%; early MEP, 71.4%). No significant improvement of MI between MEP (+) and MEP (-) was observed when MEP was performed early or late.</P><P><B>Conclusion</B></P><P>Our results revealed that the predictability of motor outcome might be better if MEP is performed late compared to that when MEP is performed early in patients with PH.</P>
Isolation and Structural Determination of Squalene Synthase Inhibitor from Prunus mume Fruit
( Sung Won Choi ),( Nam Yoon Hur ),( Soon Cheol Ahn ),( Dong Seob Kim ),( Jae Kwon Lee ),( Dae Ok Kim ),( Seung Kook Park ),( Byung Yong Kim ),( Moo Yeol Baik ) 한국미생물생명공학회 2007 Journal of microbiology and biotechnology Vol.17 No.12
( Sung Eun Kim ),( Young Pil Yun ),( Dong Hun Suh ),( Young Ran Kim ),( Kyeong Soon Park ),( Yong Dae Kwon ),( Joon Ho Suh ),( Jun Young Chung ),( Deok Won Lee ) 한국조직공학·재생의학회 2012 조직공학과 재생의학 Vol.9 No.4
Titanium (Ti) has been widely used in the dental field owing to its good biocompatibility, superior mechanical properties, and excellent corrosion resistance. However, Ti lacks the osteoconductivity and osteoinductivity required to promote mineralization. In the present study, the authors investigated whether apatite-coated Ti and rhBMP-2 treated apatite-coated Ti promote more mineralization than pristine Ti. Characterizations of pristine Ti, apatite-coated Ti, or rhBMP-2/apatite-coated Ti were analyzed using scanning electron microscopy (SEM), energydispersive spectroscopy (EDS), and attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). In addition, the release profile of rhBMP-2 from rhBMP-2/apatite-coated Ti was monitored for 28 days, and the biocompatibility of pristine Ti, apatite-coated Ti, and rhBMP-2/apatite-coated Ti was evaluated by measuring cell proliferation, alkaline phosphatase (ALP) activity, calcium deposition, and real-time PCR using MG-63 cells. SEM, EDS, and ATR-FTIR showed that the apatite on apatite-coated Ti surfaces was similar to that of natural bone. Furthermore, rhBMP-2 appeared to be released steadily over 28 days from rhBMP-2/apatite-coated Ti, and MG-63 cells grown on rhBMP-2/apatite-coated Ti showed significantly higher proliferation activity, ALP activity, and calcium deposition compared to MG-63 cells grown on pristine Ti or apatite-coated Ti. Furthermore, osteocalcin and osteopontin gene expression in MG-63 cells grown on rhBMP-2/apatite-coated Ti was significantly greater than that in MG-63 cells grown on pristine Ti or apatite-coated Ti by real-time PCR. Taken together, rhBMP-2/apatite-coated Ti substrate has enhanced osteoblast function and mineralization. Thus, rhBMP-2/apatite-coated Ti may be a more effective substrate than pristine Ti used in the dental field.