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폴리에스테르 섬유 감량시스템용 프로세서 타이트레이터 개발
조진호,이흥락,이종현,김명남,구성모,김무영,진경찬,유병희,강민수,김국진 경북대학교 센서기술연구소 1993 연차보고서 Vol.1993 No.-
폴리에스테르 섬유 감량시스템의 제어를 위해서는 처리조 내에서 감량되는 섬유가 목표 감량치에 도달했는지를 판단해 주는 장치가 필요하다. 본 연구에서는 가성소다용액의 초농도 및 섬유 감량 정도의 정확한 측정과 감량 종료시간의 산출 및 이에 따른 종료신호를 발생할 수 있는 폴리에스테르 섬유 감량기 전용의 자동적정장치를 개발하였다. To control caustic soda treatment system for the polyester fabric reduction, we need the device to determine that the fabric has been arrived target reduction value. In this study, we develope an automatic process titrator for the caustic soda treatment system. Major functions of the target titrating system are accurate measurements of the caustic soda concentration and then producing the end point signal for caustic soda treatment system.
진국범,박경옥,이동근,장동호,민승기,방만혁 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.1
Recently, we have used internal fixation with titanium miniplate which introduced by Champy in 1976 in facial bone fractures. In cases of mandibular fractures, particulary mandibular angle fractures, we usually underwent the open reduction extraorally. But extraoral approaches may leave scars and put the facial nerve at greater risk. So, we had undergone the intraoral approaches in 31 patients of mandibular angle fractures (male : 29, female : 2)> These patients visited in Wonkwang university hospital from October 1991 to June 1993. We got easy operation time as average 20 minutes than extraoral approach. And reduced the postoperative nerve injury(14.2%), but postoperative infection is 6.1% nearly as same as extraoral approach. TMJ problems after intraoral open reduction was similar to extraoral approaches.
농업용수 수질기준의 문제점 및 개선대책 : 외국사례와의 비교를 통해
김진호,이종식,정구복,윤순강,고문환,심재천,권순국 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.3
우리나라 농업용수 수질기준과 다른 국가 또는 농업관련 국제기구의 수질기준에 대한 비교분석을 통해 우리나라 농업용수 수질기준의 문제점 도출과 해결방안을 모색코자 본 연구를 수행하게 되었으며, 그 결과를 요약하면 다음과 같다. 1. 우리나라 농업용수 수질기준은 관개용수 수질기준이 아니고, 수원보호측면의 수질기준이라 할 수 있다. 2. 우리나라 수질기준중 유기물지표가 하천과 호소에 따라 BOD와 COD로 이원화되어 있고, 특히 COD의 경우 산화제로 KMnO4를 사용함으로써 효과적인 유기물지표로 활용할 수 없는 실정이다. 농업용수로의 활용측면에서는 K₂Cr₂O_(7)을 이용한 COD를 기준으로 도입하는 것이 유기물 분해능 및 수중의 유기물지표로 활용하고 있는 국제적 데이터 일치를 위해서도 타당하다. 3. 우리나라 농업용수 수질기준은 캐나다와 FAO에서 제시하고 있는 염류에 대한 기준은 거의 없는 실정이다. 또한 양이온에 대한 기준도 없다. 염류의 기준이 모든 이온 존재의 가능성을 의미하므로, 실험치 및 외국문헌에 의한 1.0dS/m수준을 한계농도로 선정해야 한다. 4. FAO와 캐나다에서 사용하고 있는 축산용수에 대한 수질기준이 없다. 5. 관개용 농업용수가 농업(작물)에 미칠 수 있는 영향을 평가하기 위해서는 수원별로 수질기준이 다른 것이 큰 모순이다. 따라서 관계부처에서는 부처간의 이해를 떠난 수질기준을 설정해야 한다. 6. 우리나라 농업용수 수질기준의 모순점을 극복하기 위해서는 농업의 안전성확보측면 위해 관개용수 수질기준과 축산용수 수질기준을 조속히 제정해야 할 것이다. Present problems and possible solutions on the Water Quality Standards for Agriculture in Korea, were identified in the study. Because the Ministry of Environment made the laws and standards without consulting the agri-scientists, among others, the water quality standards formulated were not suitable standards of FAO, Japan, Canada, and the likes. The BOD and COD are the organic materials indicators. In case of rivers, BOD are set for the indicator. And at reservoirs. COD are set. Especially. COD was analysed using KMnO₄It is not suitable oxidizing agent for COD. Because the oxidic capacity is very low. So, in most developed country, K₂Cr₂O_(7) is usually used to analyze COD. And the salts and cations are not belonged to the Korean Water Quality Standards for Agriculture. The water quality standards for agriculture have big differences among lakes, rivers and groundwater. To apply different standards by resources to evaluate the relationship between water and crops is conflicting. So, to overcome the these problems, the suitable water quality standards for irrigation and livestock should be set.
중량물 들고 보행시 잡기유형의 차이에 대한 운동학적 분석
서국웅,윤양진,김용재,이훈식,정미라,이창민,이중숙 한국운동역학회 2000 한국운동역학회지 Vol.9 No.2
The purpose of this study was to examine the kinematic changes of the body according to various weight loads and the holding during carrying object. The experiments were conducted with utilizing image, analyses for five male and five female adults as subjects. The results were as followed. 1. Meaningful differences were shown partially in the angle changes of the subject's wrist joints, elbow joints and coxal articulations, but not in the angle changes of the subject's knee joints, according to the types of holding the objects while subjects carrying 5kg objects. So, carrying a light object of 5kg in workplaces or gyms doesn't have much influence on human joints and muscles. 2. Meaningful differences of angle changes were shown between right holding and vertical holding while subjects carrying 10kg objects. Female subjects had difficulties to hold the angles of their wrist joints and elbow joints, carrying 10kg objects, because the first loads were imposed on their wrists and female has weaker muscles than male. In right holding of 10kg objects, female subjects had backward body centers from their bodies, the angle of their coxal articulation became bigger and they had unstable behaviors. 3. Female subjects had wider angle of their wrist joints and elbow joints while carrying 15kg objects than male subjects. But male subjects had bigger angle of coxal articulation than female subjects. Because female has weaker muscles, female subjects couldn't maintain the angles of their wrist joints and elbow joints. 4. The 20kg objects influenced the angles of the wrist joints, the elbow joints and the coaxal articulations of both sex subjects in any type of holding during their carrying 20 kg objects, but didn't influence their knee joints. 5. in carrying 25kg objects, female subjects had wider angles of their wrist joints, elbow joints and knee joints in each holding type than male subjects and the significant difference were shown according to the holding type. But in the case of coxal articulation, male subjects had the bigger angles and meaningful differences. This comes from the weakness of female's muscle. N\Male subject's upper bodies were drawn back and the objects influenced their wrists more than their arms.
도시 거주 노인 수면 습관 및 불면증상의 요인 : 인구학적,질병 및 정신증상의 관련성
홍진표,안준호,윤영국,박종익,이소영,함봉진,김장규,한오수,조맹제 대한신경정신의학회 2000 신경정신의학 Vol.39 No.6
연구목적 : 본 연구는 국내 노인의 습관을 조사하고 불면 증상과 연관 있는 인구학적, 질병학적 요인을 알고자 했다. 방 법 : 1997년 12월부터 1998년 1월까지 약 1개월에 걸쳐 2단계 층화집락표본추출의 역학조사법을 통해 선정된 3개 4개동 거주의 만 65세 이상 노인을 대상으로 수행되었다. 대상자 중 723명에서 등답을 받았으며 응답률은 73.8였다. 대학생인 설문조사요원들을 훈련시킨 뒤, 이들로 하여금 대상지역의 노인거주가정을 방문하여 개개 노인을 대상으로 반구조화된 면담으로 수면습관 및 불면증상 설문을 실시하였으며 그 외 한국어판 노인정신장애평가척도, 삶의 질 척도를 이용한 설문조사와 과거 질병력을 청취조사하게 하였다. 결 과 : 국내 노인들은 평균 오후 10시 16분에 자리에 누워 오전 5시22분에 일어나서 총 7시간 6분의 수면시간을 보였다. 노인의 11.7%가 거의 매일 밤 불면증을 14.8%가 간헐적 불면증을 호소하였다. 남자에서는 연령이 증가할수록 침상에 누워있는 시간이 증가하고, 또, 입면시까지 소요되는 시간과 수면 중의 각성회수가 증가되었으나 여성에서는 명확하지 않았다. 단변수 분석에서 요통, 중풍 병력의 환자에서 불면증상이 심했다. 다변량분석 결과 불면 증상과 관련 깊은 요인으로 남자에게서는 고령과 우울증상이 여자에게서는 남자의 위험요인에다 신체통증과 피부병력이 추가로 관련이 있었다. 결 론 : 지역 거주 노인에서 불면 증상은 매우 흔한 증상이며 우울증상과 명확한 상관관계를 보이고 있었다. 불면증을 극복하기 위해 불면증 위험요인의 인과관계에 대한 추후 연구가 필요하다. Objectives : The purpose of this study is to analyze sleep habit and investigate the association between insomnia and demographic, health and psycho-behavioral symptomatology in Korean urban elderly Method : A total of 723 community residents aged 65 years or older were surveyed by two stage, random cluster sampling method. The response rate was 76.2%. Interviewers performed door to door visits and administered a questionnaire about sleep, past medical history, and several scales as the Psychogeriatric Assessment Scale(PAS), the short form Quality of Life Scale (SF-36) and etc. Results : The mean scores are as follows : retiring time was ten-sixteen p.m., wake-up time was five twenty two a.m., duration of sleep was seven hours and six minutes. Among the elderly, 11.6% and 14.8% of the subjects reported chronic and intermittent difficulty in sleeping, respectively. The patients with back pain and history of stroke complained of more insomnia symptoms in univariate analysis. In ANCOVA analysis, insomnia symptoms were associated with an old age, depressive symptoms in male. Bodily pain and history of dermatologic disease were additional risk factors in female. Conclusions : The data suggest insomnia is one of most common health problems among elderly Koreans living in the community. Strong positive relationship between depressive symptoms and insomnia were found. Further research is needed to explore the causal relationship between insomnia and risk factors.
회전 자계에 의해 초전도체에 발생되는 Eddy current 분포에 관한 연구
고태국,최진형,오윤상 연세대학교 산업기술연구소 1993 논문집 Vol.25 No.2
The distribution of magentic field and eddy current is analized to investigate the normal spot wihich plays a part in excitation. Magnetic Reynods Number has been introduced to explain the distribution of magnetic field and eddy current. Through the eddy current equation, we can predict where the quenching points are formed in superconductiong sheet. The part of zero-compression by motion. When the magnetic of the normal spot is large, the eddy current is increased in the side of normal spot and decreased in the left side. So the current reaches to the critical current, the superconductor begins to quench locally.