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.

백서 척수에서 Capsaicin과 Eugenol이 iCGRP (immunoreactive calcitonin gene-related peptide) 분비 조절에 미치는 영향

오원만,김원재,최남기,박상원,황인남,김선현 大韓齒科保存學會 2001 Restorative Dentistry & Endodontics Vol.26 No.5

Neuropeptide such as calcitonin gene-related peptide and substance P may mediate neurogenic inflammation, but little is known about the regulation of neuropeptide release from rat spinal cord. Eugenol has been reported to reduce odontogenic pain and is known to have a structure similar to capsaicin, a potent stimulant of certain nociceptors. This study was done to examine the effect of capsaicin and eugenol on immunoreactive calcitonin gene-related peptide (iCGRP) release from rat spinal cord and whether eugenol regulates capsaicin-sensitive release of iCGRP or it evokes capsaicin-sensitive release of iCGRP. The dorsal half of rat lumbar spinal cord was chopped into 200㎛ slices. They were superfused (500㎕/min) in vitro with an oxygenated Kreb's buffer. The EC50 of capsaicin on iCGRP release was measured. Eugenol (600㎛ and 1.2mM) and vehicle (0.02% 2-hydroxyl-β-cyclodextrin) were administered prior to stimulation of rat lumbar spinal cord with capsaicin. The amount of iCGRP release from rat lumbar spinal cord was measured by radioimmunoassay. The results were as follows : 1.iCGRP release from rat lumbar spinal cord was dependent on concentration of capsaicin. The EC50 of capsaicin on iCGRP release was 3㎛. 2.In the vehicle treated group, capsaicin (3㎛) evoked a 14-fold increase over basal iCGRP level. 3. Administration of 600㎛ and 1.2mM eugenol evoked a 2.2-fold increase and a 2.3-fold increase over basal iCGRP level respectively. 4.Administration of 600㎛ and 1.2mM eugenol increased capsaicin evoked release of iCGRP by more than 50%. These results indicate that eugenol evoke CGRP release from central nervous system and potentiate the pain-inducing action of capsaicin on it Key words : Eugenol, Capsaicin, Rat lumbar spinal cord, Superfusion, Radioimmunoassay

동북아 피더네트워크의 Win-win전략에 관한 연구

장우준(Woo-jun jang),전찬용(Chan-Yong jeon),김태원(Tae-Won Kim),곽규석(Kyu-Seok Kwak),남기찬(Ki-Chan Nam) 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.3 No.1

최근 중국은 양산항을 개장하여 선사 유치를 위한 다양한 혜택을 제공하고, 일본은 "수퍼중추항만 육성계획“을 세워 항만의 효율성을 바탕으로 비용을 낮추려는 노력을 하고 있다. 또한 선박의 대형화에 의한 중심항만(Hub Port) 위주의 기항과 북중국의 대량 물량 발생지역에 대한 직기항 경향으로 동북아 항만간의 경쟁이 더욱더 치열해 지고 있으며 동북아 역내 피더네트워크 강화의 필요성이 제기되고 있다. 따라서, 본 연구에서는 유럽 피더네트워크 전략 사례를 바탕으로 동북아 피더시장 현황을 파악하고 동북아 피더네트워크 구조를 분석함으로써 동북아 역내 항만 및 선사간의 과당경쟁을 지양하고 서로 Win-Win할 수 있는 터미널의 전략적 활용, 선사간 제휴 확대, 항만간 협력 강화를 위한 구체적인 전략을 제시하였다. Recently, China opened Yangshan port and provides a variety of benefits for shipping companies. Japan plans to reduce logistics costs and improve efficiency through the established "super major ports" project. According to the "hub and spokes" system, the number of direct calls toward North-Chinese ports are increasing. This changing environment has negative effects on the amount of transshipment cargos in Korean ports. In order to make a hub port of a domestic port, it is necessary to develop northeast Asian feeder networks. Therefore, this paper analyzes the structure of northeast Asian feeder networks through the case study of European feeder networks strategy. Finally, we suggests the plans to reinforce feeder networks, which are strategic terminal operation, strategic alliances between shipping companies and port co-operation, for win-win strategy in the competitive northeast Asian market.

Effects of pyridoxine on a high‐fat diet‐induced reduction of cell proliferation and neuroblast differentiation depend on cyclic adenosine monophosphate response element binding protein in the mouse dentate gyrus

Yoo, Dae Young,Kim, Woosuk,Yoo, Ki‐,Yeon,Nam, Sung Min,Chung, Jin Young,Yoon, Yeo Sung,Won, Moo‐,Ho,Hwang, In Koo Wiley Subscription Services, Inc., A Wiley Company 2012 JOURNAL OF NEUROSCIENCE RESEARCH - Vol.90 No.8

<P><B>Abstract</B></P><P>In this study, we challenged pyridoxine to mice fed a high‐fat diet (HFD) and investigated the effects of pyridoxine on HFD‐induced phenotypes such as blood glucose, reduction of cell proliferation and neuroblast differentiation in the dentate gyrus using Ki67 and doublecortin (DCX), respectively. Mice were fed a commercially available low‐fat diet (LFD) as control diet or HFD (60% fat) for 8 weeks. After 5 weeks of LFD or HFD treatment, 350 mg/kg pyridoxine was administered for 3 weeks. The administration of pyridoxine significantly decreased body weight in the HFD‐treated group. In addition, there were no significant differences in hepatic histology and pancreatic insulin‐immunoreactive (‐ir) and glucagon‐ir cells of the HFD‐treated group after pyridoxine treatment. In the HFD‐fed group, Ki67‐positive nuclei and DCX‐ir neuroblasts were significantly decreased in the dentate gyrus compared with those in the LFD‐fed mice. However, the administration of pyridoxine significantly increased Ki67‐positive nuclei and DCX‐ir neuroblasts in the dentate gyrus in both LFD‐ and HFD‐fed mice. In addition, the administration of pyridoxine significantly increased the protein levels of glutamic acid decarboxylase 67 (GAD67) and brain‐derived neurotrophic factor (BDNF) and the immunoreactivity of phosphorylated cyclic AMP response element binding protein (pCREB) compared with the vehicle‐treated LFD‐ and HFD‐fed mice. In contrast, the administration of pyridoxine significantly decreased HFD‐induced malondialdehyde (MDA) levels in the hippocampus. These results showed that pyridoxine supplement reduced the HFD‐induced reduction of cell proliferation and neuroblast differentiation in the dentate gyrus via controlling the levels of GAD67, pCREB, BDNF, and MDA. © 2012 Wiley Periodicals, Inc.</P>

수족냉증(手足冷症) 환자(患者)에 대(對)한 컴퓨터 적외선(赤外線) 체열촬영(體熱撮影)의 의의(意義)

조유경,오수완,조남희,김동묵,김진성,류봉하,박동원,류기원,Cho, Yu-Kyung,Oh, Su-Wan,Cho, Nam-Hee,Kim, Dong-Mook,Kim, Jin-Seong,Ryu, Bong-Ha,Park, Dong-Won,Ryu, Ki-Won 대한한방내과학회 1998 大韓韓方內科學會誌 Vol.19 No.2

To make a objective diagnosis of the syndrome of cold-limbs, We investigated the 20 patients with cold limbs and GI trouble and 20 normal people as a control group. And we compared the thermal difference between Chon-jung(CV17) and Chung-wan(CV12 中脘), Chon-jung(CV17) and Ki-hae(氣海 CV6) and we compared the thermal differences of No-gung(PE8 勞宮) and Yong-chon(湧泉 KI1), too. The results were as follows. 1. All 20 patients had GI trouble and cold limbs. They had the symptom-Indigestion(16 cases-80%) with heart burn, tympanites, abdominal distention, hiccup, belching. Beside that symptom they also had constipation(6 cases-30%), diarrhea(3 cases-15%), headache & dizziness(6 cases-30%). And some had the menstrual syndrome, chronic fatigue, palpitation, insomnia, edema, arthralgia. 2. The thermal difference of the palms between the patients group and the control group were $25.70^{\circ}C,\;25.82^{\circ}C$, but they were not significant. 3. The thermal difference of the soles between the patients group and the control group were $23.58^{\circ}C,\;24.42^{\circ}C$ and the significancy was P=0.020 so it was significant(P<0.05). 4. The thermal difference of the palms and Chon-jung(CV17) between the patients group and the control group were $1.08^{\circ}C,\;0.76^{\circ}C$, but they were not significant. 5. The thermal difference of the sales and Chon-jung(CV17) between the patients group and the control group were $3.01^{\circ}C,\;1.90^{\circ}C$ and the significancy was P=0.003 so it was significant(P<0.05). 6. The thermal difference of Chon-jung(CV17) and Chung-wan(CV12 中脘) between the patients group and the control group was $0.30^{\circ}C,\;0.62^{\circ}C$ and the significancy was P=0.793 so it was significant(P<0.05). 7. The thermal difference of Chon-jung(CV17) and Ki-hae(CV6 氣海) between the patients group and the control group was $0.53^{\circ}C,\;0.68^{\circ}C$, but they were not significant. From the above, I could find the significance of D.I.T.I to diagnose the cold-feet not the cold-hands and the thermal difference between the trunk and limbs was more significant on cold-feet than on cold-hand, either.

고관절 전치환술시 응용프로그램을 이용한 수술 전 계획

원중희,김용민,최의성,손현철,박경진,남기세,정재중 대한고관절학회 2003 Hip and Pelvis Vol.15 No.3

조혈모세포이식환자에서 조혈기능의 회복과 관련된 인자들에 관한 연구

정기주,강명수,권기두,김경하,이상철,김현정,배상병,김찬규,이남수,이규택,원종호,홍대식,박희숙 순천향대학교 의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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식도암과 위암이 동시에 발생한 원발성 중복암 1예

윤혜원,심기남,나선경,송도경,정정화,정가영 이화여자대학교 의과학연구소 2012 EMJ (Ewha medical journal) Vol.35 No.2

Double primary cancers are two independently developed cancers in an individual. There have been some reports on double primary cancer since Billroth reported it for the first time in 1879. Double primary cancer of the stomach and esophagus has been revealed a very low incidence worldwide. The incidence of an esophageal cancer with another primary cancer is reported to be 9.5∼27%, but double primary cancers in the esophagus and stomach have been rarely reported to our knowledge. In this study, we present here a case of double primary esophageal and stomach cancer in a 66-year-old man because of progressive dysphagia.

전기 치수 검사 시 역치 자극 이후 과용(過用) 자극 시간의 측정

남기창,안선희,김수찬,김덕원,이승종 大韓齒科保存學會 2004 Restorative Dentistry & Endodontics Vol.29 No.3

Use of electric pulp testing elicits painful response in vital teeth. In this study, we examined the excessive time from pain feeling to stimulation disconnection in clinical situation. D626D (Parkell Inc., USA.) scan type electric pulp tester was used in total of 23 young healthy individuals. Each of the right central incisors and first premolars were used as testing teeth. Stimulation disconnection was achieved by EMG in anterior belly of digastric muscle, finger span, and voice and the excessive stimulation time over the sensory threshold was recorded. As a result, we found that the short responses before the stimulation disconnection appeared following order: EMG, finger span, and voice. The EMG disconnection is suggested to be used to reduce the excessive stimulus time in electric pulp testing.

집쥐에 의한 슴새 번식성공률 감소

남기백,유승화,김동원,유정칠 경희대학교 한국조류연구소 2002 연구보고 Vol.8 No.1

본 조사는 2001년 6월 25일부터 30일, 8월 12일부터 17일, 10월 20~25일까지 제주도 북제주군 추자면에 위치한 사수도에서 집단 번식하는 슴새의 번식성공률을 조사하였다. 현재 사수도에는 약 4000쌍 정도의 슴새가 번식을 하는 것으로 조사되었다. 총 110개의 둥지를 관찰한 결과, 부화률은 약 15%로 나타났으며, 전체 번식성공률은 약 3%로 나타났다. 전체 번식실패률은 96.4%로 나타났으며, 번식실패 요인으로 집쥐에 의한 포식이 92.5%로 가장 높게 나타났다. 또한 포란기와 부화기에 포식률이 각각 42%, 36%로 육추기의 포식률(11%)보다 높게 나타났다. The rate of breeding success of Streaked Shearwaters (Calonectris leucomelas) was studied at Sasu-islet, in chuja-do, cheju island during 25-30 June, 12-17 August, 20-25 October 2001. The breeding population of Streaked Shearwaters at Sasu-islet is estimated to be about 4,000 pairs. This study was based on detailed observations of 110 nests dispersed over a wide range of nest habitats within colony. Hatching success was 15% (n=17), breeding success was 3% (n=3) and breeding failure was 96% (n=106). Norway Rat(Rattus norvegicus) were responsible for failure of at least 89% of all the breeding failure. The predation rates of both incubation and hatiching periods was higher than that of rearing period.