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허진철,황재삼,강석우,윤치영,이상한 慶北大學校農業科學技術硏究所 2007 慶北大農學誌 Vol.25 No.-
In order to investigate the availability of insect resources for agrobiotechnological or medical purposes, we examined antioxidant (DPPH and FRAP assay) and cell viability by oxidant stress and NO inhibition assay by treatment of the extracts of Statilia maculata Thunberg, Tenodera angustipennis Saussure and Tenodera aridifolia Stoll. We found that Tenodera angustipennis Saussure and Tenodera aridifolia Stoll extract (DW, etanol, methanol) had high levels of anti-oxidant activity, whereas Tenodera aridifolia Stoll extract showed increased cell viability by hydrogen peroxide and inhibition of NO production. These findings suggest that Statilia maculata Thunberg, Tenodera angustipennis Saussure and Tenodera aridifolia Stoll, extract have potentials to be developed for agrobiotechnology or medicinal use, indicating that mechanistic study including inhibition against molecular inflammation will show a possibility for the development of useful insect resources.
최헌종,허남환,강은구,이석우,홍원표 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
Recently, the evolution in production techniques (e.g. high-speed milling) and the complex shapes involved in modern production design has been increasingly popular. The key to the achievement is a drastic improvement of the dynamic behavior of the machine tool axes used in production machinery. The more complex these tool paths the higher the speed and acceleration requirements. But it is very difficult to reach the target for high speed machine tool because of the limitations of servo system and motion control system. However the direct drive design of machine tool axes, which is based on linear motors and which recently appeared on the market, is a viable candidate to meet the ever increasing demands, because of these advantages such as no backlash, less friction, more mechanical simplicity and very higher acceleration and velocity comparing to the traditional system. This paper focused on the performance tests of the high speed horizontal machine tool based on linear motor. Especially, dynamic characteristics were investigated through circular test and circular form machining test is carried out considering many important parameter. Therefore these several experiments is used to be evaluated the model for prediction of circular motion error and circular machined error.
성영호,강석명,허건식 龍仁大學校 體育科學硏究所 2003 體育科學硏究論叢 Vol.13 No.2
This study is aimed at understanding the constraints of leisure for 300 male and female employees in the service of a large enterprise, S, in Suwon city, Gyeonggi province, and it analyzes the constraints of leisure for them depending on variables. The collected questionnaires were analyzed by the means of SPSS/PC+ statistics program. A One Way-ANOVA was employed to uncover the constraints of leisure depending on each variable, after which Scheffe test was carried out. With these research methods and data analyses, the conclusions of this research on the leisure constraints of large enterprise employees are as follows. First, 'lack of time', one of the constraints of leisure, demonstrated a meaningful difference (p<.05) between male and female employees, as male employees seemed to be prevented from enjoying leisure activities by 'lack of time' more than their counterparts. Second, 'absence of a partner(s)' (p<.05) and financial cost (p<.0l) showed a meaningful difference among different age groups. Those aged between 50 and 59 seemed to suffer from 'absence of a partner(s)' more than any other factors in enjoying leisure, whereas 'lack of time', was a more important constraint for those aged between 30 and 39. Third, all the factors lack of time, facilities and programs, lack of motivation, laziness, absence of a partner(s), and financial cost - appeared to have no meaningful difference among employees with different duties. Fourth, 'lack of motivation' (p<.05), 'laziness' (p<.05), and 'financial cost' (p<.0l) showed a meaningful difference among employees with a diverse range of careers. Those with a career of over 26 years pointed out 'lack of motivation' and 'laziness' as the most crucial constraints of leisure, whereas 'financial cost' seemed to matter to the leisure of those with a career between 11 and 15 years more than any other constraints.
홍순혁,이동우,허건,조석수,주원식 동아대학교 생산기술연구소 2000 生産技術硏究所硏究論文集 Vol.5 No.1
Ultrasonic inspection of defects has been focused on the existence of defect in structural material and need has much time and expenses in inspecting all the coordinates (x, y) on material surface. Neural networks is information processing system modeling human brain and can have an application to coordinates (x, y) of defects by multi-point inspection method. Ultrasonic inspection modeling is optimized by neural networks which makes defect echo, back-wall echo and ultrasonic transducer units of input layer and absolute and relative coordinates of defects and defect pattern units of output layer. This method can predict coordinates (x, y) of defects within engineering estimated mean error Ψ.
윤한덕,류진호,박주경,허탁,조석주,김성근,민용일 大韓應急醫學會 1997 대한응급의학회지 Vol.8 No.1
We analyzed records at Chonnam university hospital from Sep. 1. 1993 to Aug. 31. 1996 to assess clinical significance of the foreign body in the gastrointestinal tract. There were 133 episodes consisting of 79 pediatric and 54 adult patients as possible to review. In the pediatric patients, the coin was the most common cause of foreign body ingestion, while adult patients were usually caused by bones and meat. We removed foreign bodies in the oral cavity and oropharynx in 12 cases using direct laryngopharyngoscpy and forcep. Endoscopy was performed successfully in 47 of 51 patients in which was attempted; there were two complications composed of an aspiration pneumonia and a mediastinitis due to esophageal perforation. There were spontaneous passage of foreign bodies in 48 cases. We observed complications in 6 cases in which 4 cases needed operations due to complications. Foreign bodies which pass into the stomach can be observed for development of complications, as 94% of foreign bodies which reach the stomach spontaneously pass. Only 4 patients required interventions, which was done without mortality.
하악골 골절 환자에 있어 수술후 합병증으로 발생한 골수염의 치험례
윤규호,전인성,신용길,박준호,허남오,방석준 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.4
The term osteomyelitis literally means inflammation of bone marrow. It is described as an inflammatory condition of bone primarily engaging the medullary Following circulatory collapse and ischemia, the involved portions of the bone become necrotic. Cellulitis and osteomyelitis are the most frequent complications of fractures of the mandible and maxilla, because there is an abscessed tooth in the line of fracture. Since most fractures are compound fractures, infection may develop because of contact with oral secretions or outside air. The treatment of chronic osteomyelitis is still under debate. Some authors rely on antibiotics alone, while others advocate combination with surgery. But when infection occurs, establish proper drainage and administer antibiotics. Author treated a case of infected mandibular fracture with mandibular osteotomy, sequestrectomy, iliac bone graft and hyperbaric oxygen therapy, who had suffered suppurative osteomyelitis and mandibular nonunion following the open reduction of the mandibular fracture.
Tissue distribution of LOM strain viral antigens using immunohistochemistry in weaned pigs in Jeju
Jae-Sung Heo(Jae-Sung Heo),Jae-Beum Kim(Jae-Beum Kim),Yun-Ho Kim(Yun-Ho Kim),Hyoung-Nam Jo(Hyoung-Nam Jo),Won-Gyu Cho(Won-Gyu Cho),Myeong-Won Suh(Myeong-Won Suh),Hyoung-Seok Yang(Hyoung-Seok Yang),Wan 한국예방수의학회 2019 한국예방수의학회 학술대회자료집 Vol.2018 No.-