업종에 따른 연 취급 사업장의 기중 연 농도 및 연 노출 수준 평가

이병국,김용배,리갑수,안현철,김화성,이용진,황규윤,장봉기,이성수,안규동 순천향대학교 산업의학연구소 1999 순천향산업의학 Vol.5 No.1

In order to obtain an useful information for health management and biological monitoring of lead exposed workers, Authors tried to investigate air lead level and the lead exposed level of workers in lead industry according to occupational category. The subjects in our study were 2074 workers in 7 lead-using industries, and study subjects were divided into 4 occupational categories such as storage battery industry (type 1), primary smelting industry (type 2), secondary smelting industry (type 3) and litharge making industry (type 4). Blood zincprotoporphyrin concentration (ZPP), blood lead concentration (PbB) and urinary δ -aminolevulinic acid (ALAU), hemoglobin (Hb), hematocrit (Hct) were selected as the indices of lead exposure. Personal variables such as age, work duration were also collected. The results were as follows. 1. The geometric mean air lead in 9 lead-using industry was 0.1133±4.3120 ㎎/㎥, and that in type 1, 2, 3 and 4 was 0.1038±3.4952 ㎎/㎥, 0.0429±3.4329 ㎎/㎥, 0.1877±2.5123 ㎎/㎥ and 0.9961±5.2910 ㎎/㎥, respectively. 2. The mean ZPP in 9 lead-using industry was 53.1±28.0 ㎍/㎗, and that in type 1, 2, 3 and 4 was 52.0±24.8 ㎍/㎗, 48.0±16.4 ㎍/㎗, 109.8±85.6 ㎍/㎗ and 74.3±37.8 ㎍/㎗, respectively. There was significant difference in ZPP according to occupational category (P<0.01). The percents of lead workers whose ZPP were above 100 ㎍/㎗ in type 1, 2, 3 and 4 were 4.0%, 1.7%, 34.3% and 21.6%, respectively. 3. The mean PbB in lead-using industry was 26.0±11.2 ㎍/㎗, and that in type 1, 2, 3 and 4 was 25.3±11.1 ㎍/㎗, 26.7±8.8 ㎍/㎗, 50.3±15.2 ㎍/㎗ and 36.4±11.0 ㎍/㎗, respectively. There was significant difference in PbB according to occupational category (P<0.01). The percents of lead workers whose PbB were above 40 ㎍/㎗ in type 1, 2, 3 and 4 were 10.4%, 7.7% 71.9% and 43.2%, respectively. 4. While the correlation of Hb corrected PbB with ZPP was higher than non corrected PbB, the correlation of log-transformed ZPP with PbB was higher than non corrected ZPP. 5. Simple linear regressions of PbB and corrected PbB as independent variable with ZPP, log-transformed ZPP and ALAU as dependent variable were statistically significant (P0.01). Coefficient of determination of corrected PbB with other variables was higher than non corrected PbB. As the result of this study, it was suggested that reconsideration of environmental and biological monitoring program was highly recommended for secondary smelting and litharge making industry.

2자유도 PI 제어기를 이용한 BLDC 전동기의 벡터제어에 관한 연구

이종현,성낙규,이상집,이승환,오봉환,이훈구,한경희 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

This paper describes the speed control method of BLDC Motor using TDOF PI ( Tow-degree of freedom PI ). PI control method generally used has difficulty in efficient speed control because speed response and load torque response interfere each other. It can't decrease the overshoot of motor speed w rm, and shorten the response time of load torque TL, at the same time according to the step alternation of speed reference w rm. Therefore TDOF PI is applied to BLDC Motor in order to supply these weak points of PI control method in this paper. TDOF PI can get the torque characteristic of short response time as well as stable and prompt speed adjustment by separate control for speed response and load torque response. The results from the tests of C program simulation and system construction show that TDOF PI is superior to PI control system in speed adjustment and load torque response.

가토 외고정 모델을 이용한 치밀체형 세라믹스의 골결합능 평가

이재협,이동호,이재학,공현식,안영준,류현승,서준혁,홍국선,김환,장봉순,이춘기 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2

원문 : 좌업 시간과 알코올 섭취가 30대 남자 사무직 근로자의 혈압과 혈관탄성에 미치는 영향

조봉오 ( Bong Oh Cho ),이인녕 ( In Yeong Lee ),정균근 ( Gyun Geun Jeong ),장창현 ( Chang Hyun Jang ) 한국운동생리학회(구 한국운동과학회) 2014 운동과학 Vol.23 No.3

조봉오, 이인녕, 정균근, 장창현. 좌업 시간과 알코올 섭취가 30대 남자 사무직 근로자의 혈압과 혈관탄성에 미치는 영향. 운동과학, 제23권 3호, 241-248, 2014. 본 연구의 목적은 일과 중 대부분을 좌업근무 형태로 업무를 수행하고, 스트레스로 인해 음주가 잦고, 운동이 부족한 30대 남자 사무직 음주자 15명을 대상으로 좌업 시간과 알코올 섭취가 혈압과 혈관탄성에 미치는 영향을 분석하여 사무직 근로자에게 건강관리에 필요한 정보를 제공하는데 있다. S대학 운동 생리학 실험실에서 사전 인적 사항과 설문을 작성하고, 신장, 체중, 채혈, 혈압, 혈관탄성, BMI를 측정하였다. 알코올 섭취 횟수, 섭취량, 좌업 시간, 그리고 음주 섭취 전과 후 및 시간대별 (10분, 40분, 60분) 혈압과 혈관탄성의 변화를 측정 분석한 결과를 요약하면 다음과 같다. 1) 평균 좌업시간이 9.87시간, 음주횟수 및 음주량은 월 평균 9.13회와 12.47잔 이였다. 2) 알코올 섭취횟수 및 섭취량에 따른 BMI, TC, LDL-C, HDL-C, 혈압과 혈관탄성 비교에서 알코올 섭취횟수에서 좌상지 혈관탄성은 통계적으로 유의한 차이를 나타냈다(p<.05). 3) 알코올 섭취 전, 후 비교 분석 결과 우상지와 좌상지의 혈관탄성에서 통계적으로 유의한 차이가 나타났다(p<.05). 4) 알코올 섭취 후 시간대별 우상지 혈관탄성은 통계적으로 유의한 차이를 나타냈다(p<.05). 이상의 결과를 종합해 볼 때, 좌업 시간이 혈압과 혈관탄성에 미치는 영향은 통계적으로 유의하게 나타나지 않았고, 알코올 섭취는 혈관탄성에 통계적으로 유의한 차이를 나타냄을 알 수 있었다. 따라서 이는 직장생활의 스트레스를 음주로 해소하는 경향이 있음을 보여주며 건강에 부정적인 영향을 주고 있음을 알 수 있었다. 또한, 신체가 음주에 적응되어 실험 시 섭취한 적은 양(1/2병)은 1회 12.47잔에 비해 혈압과 혈관탄성에 큰 영향을 미치지 못한 것으로 사료된다. Cho, Bong-Oh, Lee, In-Yeong, Jeong, Gyun-Geun, Jang, Chang-Hyun. Effects of Sedentary Occupation Time and Alcohol Intake on Blood Pressure and Vascular Compliance in 30s Male White-Collar Workers. Exercise Science, 23(3): 241-248. 2014. The purpose of this study was to examine effects of duration of sedentary office work and alcohol intake on blood pressure and vascular compliance in male subjects who were office workers aged between 30 to 39 and frequently drink alcoholic beverages to cope with their stress without exercising for health. The study was to provide health-related information necessary for white-collar workers. We collected data of demographic information, height, weight, blood sample, blood pressure, vascular compliance, and BMI from 15 subjects in S University`s Exercise Physiology Laboratory, and analyzed the frequency and amount of alcohol intake, duration of sedentary work, and changes in blood pressure and vascular compliance at diffident time points (10, 40, and 60 minutes post drinking) from baseline. I t was found that the average time of sedentary work was 9.87 hours, drinking 9.13 times a month on average, 12.47 glasses of alcohol beverages per drink. In comparison of BMI, TC, LDL-C, HDL-C, blood pressure and vascular compliance upon the frequency and amount of alcohol intake, the upper left limb`s vascular compliance had a statistically significant difference (p<.05). In the result of the comparative analysis of pre-and post-drinking, vascular compliance was significantly different in the upper right and left limbs (p<.05). Vascular compliance in the upper right limb after drinking significantly changed (p<.05). As a result, the duration of sedentary work had no statistically significant difference in blood pressure and vascular compliance. T he vascular compliance after drinking h ad a statistically significant difference. This suggested that the result was an index that shows the trend of the office workers releasing their work stress by drinking alcoholic beverages, and that drinking had negative impacts on them. In addition, a small amount of intake (a half bottle) at the test time, after the body was adjusted to drinking, compared with 12.47 glasses per intake, had no great impacts on blood pressure and vascular compliance.

사후분해 시체에 대한 법의학적 접근

최영식,이상용,김유훈,조갑래,이봉우,양경무,정낙은,서중석,이한영,이원태,강현욱 大韓法醫學會 2000 대한법의학회지 Vol.24 No.2

Disposal of a homicide victim by dismemberment is rare, but individual cases are on record in most major medicolegal departments. Recognition of postmortem mutilation may be of importance in the interpretation of certain murders committed by sexual perverts and other mentally deranged individuals and sometimes performed for the sole reason of easier disposal of the body. Postmortem dismemberment is usually readily recognizable as such; The edges of the injuries are dry and lack evidence of bleeding. The joints may be disarticulated without fracture, or the use of an axe or saw may be evident from examination of bones. Parallel horizontal or oblique furrows in the bone surface are caused by skipping of the saw prior to establishing depth. Such patterns on the bone may assist in identifying the particular saw involved. So we report 25 dismembered corpses that autopsied in National Institute of Scientific Investigation. This paper can help in attempting to establish not only the first criminal investigation steps but also the medicolegal approach methods in unidentified and dismembered deaths.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

체외충격파 쇄석술 시행 후 5년 뒤 발생한 요관 협착 및 농신장 1예

이현승,권균홍,조용건,김봉진,임창섭,김자영,허동,임학 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.4

A 40-years-old woman was admitted to this hospital with flank pain and high grade fever for 2 weeks. As a matter of her past history, extracorporeal shock wave lithotripsy (ESWL) was performed for treatment of renal stones 5 years ago. Her abdominal CT findings were hydronephrosis with pyonephrosis and renal stones. Antibiotics administered for 5 days had no effects on her symptom improvement. A right ureteral stricture was noticed by ultrasonography follow up. We inserted double J stent and continued antibiotics therapy for 10 days, and then her fever was disappeared and flank pain was improved. ESWL is one of the most important treatment of renal and ureteral stone. However, its complications should not be negligible including bleeding, pain, ureteral obstruction, infection and so on. Complications of ESWL can be divided into acute and chronic courses. When we treat pyelonephritis patient with past history of ESWL, possibility of ureteral stricture must also be considered. In this study we report a case of pyelonephritis caused by ureteral stricture, possibly as a chronic complication of ESWL performed 5 years earlier

인형결핵균의 각 단백항원 분획에 대한 IgG 항체역가

이봉규,최대경,백태현 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.1

The author has studied the evaluation of IgG antibody values for each antigen fraction in Mycobacterium tuberculosis with sera isolated from 20 patients in GongJu National Hospital and 20 medical students in Chungnam National University. In this study, the levels of IgG antibody values were measured after absorption of 1 : 400 diluted sera with Mycobacterium bovis and Mycobacterium kansasii antigen. The results were summarized as follows: 1. In the evaluation of IgG antibody values for each antigen fraction of Mycobacterium tuberculosis, the values of fraction 40 in sera from patients and controls were 1.365±0.210 and 0.205±0.107, respectively. 2. The IgG antibody values of fraction 40 in sera from patients and controls after absorption of 1 : 400 diluted sera with Mycobacterium bovis antigen were 1.207±0.245 and 0.134±0.087, respectively. The ratio of fraction 40 in sera from patients and controls was 9.007. 3. The IgG antibody values of fraction 40 in sera from patients and controls after absorption of 1 : 400 diluted sera with Mycobacterium kansasii antigen were 1.156±0.308 and 0.103±0.071, respectively. The ratio of fraction 40 in sera from patients and controls was 11.223.

한 중소도시의 청소년 약물사용 실태조사

이후경,김선재,윤성철,봉수연,안현주,박선영 대한신경정신의학회 2001 신경정신의학 Vol.40 No.1

-초록- 연구목적: 약물사용의 가능성이 가장 높은 시기는 십대 후반에서 이십대 초반의 청소년기로 알려져 있다. 또한 청소년기의 약뮬사용은 빠른 의존의 가능성, 심각한 약물남용으로 진행할 가능성, 약물로 인한 공격성의 증가 등으로 심각한 사회문제가 될 여지가 많다. 그러므로 저자들은 중소도시에서 청소년 약물사용의 예방 및 치료를 위한 정책을 마련하는데 기초가 될 수 있는 청소년 약물사용 실태를 조사하는 것을 목적으로혹시청소년상담실의 기금을 받아 본 연구를 시행하였다. 저자들이 세운 연구가 설은 다음과 같다. 첫째, 나이, 성(性)과 같은 개인적 요인에 따라 청소년의 약물사용에 차이가 있을 것이다. 둘째, 가정, 또래집단과 같은 환경적 요인에 따라 청소년의 약물사용에 차이가 있을 것이다. 셋째, 음주, 흡연, 비행과 약물사용과는 상화관련이 있을 것이다. 방법: ㅎ시 4개 중학교 학생 833명(51.6%), 3개 고등학교 학생 780명(48.4%), 성별은 남자(49.5%), 여자(50.5%), 총 1613명을 대상으로 하여 1999년 7월 12일부터 14일까지 3일간 설문조사를 실시하였다. 결과: 1) 술(59.4%), 담배(34.4%)의 경험이 가장 높았고, 의약품 중에는 진통제(33.1%), 흡입제(inhalants)중에는 본드(0.7%), 마약류 중에서는 히로뽕(0.4%)의 사용이 가장 많았다. 2) 술, 담배, 수면제, 각성제, 신경안정제의 사용경험이 중학생 보다 고등학생이 거의 두 배 이상 높았다. 3) 약물을 사용하지 않는 학생의 부모 화목도 점수가 약물을 사용하는 학생의 부모 화목도 점수보다 의미 있게 높은 것으로 나타났다. 4) 흡연 및 음주경험이 있는 학생의 친구들이 그렇지 않은 학생의 친구들에 비해 술, 의약품, 흡입제를더 많이 사용하였다. 5) 술, 담배, 약물을 사용하는 학생들이 비행 가능성이 높았다. 6) 술을 사용하게 되는 가장 많은 이유는 '친구들과 어울리기 위하여'(55.0%), 담배를 사용하게 되는가장 많은 이유는 '심심해서'(50.9%)이었다. 7) 술, 담배, 약물을 사용하면 다른 것을 사용할 가능성이 높은 것으로 나타났다. 결론: 한국의 청소년 약물사용경험은 이제까지의 연구와 본 연구를 종합하여 볼 때 지속적으로 증가하고 있다. 향후 약물사용을 줄이기 위해서는 국가적인 차원에서 약물사용 실태조사가 선행되어야 하고, 그 결과에 따른 적절한 대책의 수립과 정신과 의사들의 적극적인 참여가 필요하다. Objectives : The purpose of this research is to help solve adolescent issues involving substance uses, which may become begin to undergo many changes(i.e.practising various roles, thereby leading to independent life styles). More often than not, adolescent drug problems develop into social problems, chiefly behavioral imitations and heavy dependence on medicine. The authors conducted a survey of adolescent substance uses to develop preventive measures against the drug habit prevalent among young people, thereby formulating a policy to deal with problematic community. Funded by a Yuth Counselling Center in the city of H. the research was conducted on the following assumptions that there will be : Firstly, a comparison of drug uses by sex and age ; Secondly, variance of substance users by family background and peer group ; Thirdly, a combination of heavy drinking, smoking and delinquency resulting in the drug habit. Methods : the survey included a total of 1613 students during 3 days, 12 through 14, July, 1999. The subjects were 833 pupils(51.6$) from 4 middle schools and 780 students(48.4%) from 3 high schools in the city of H with a ratio of 49.5%(males) and 50.5%(females). Results : 1) Experience of substance use is most referable to drinking(59.4%) and smoking(34.4%) while given to analgesics(33.1%) among medicines, glue(0.7%) among inhalants and philophone(0.4%) among narcotics. 2) High school students found more than double the amount of smoking and drinking as well as uses of hypnotics, stimulants and sedatives by junior high school students. 3) Our resalt showed was significantly noted that non-users had a better relationship with their parents than most users. 4) Smoking and drinking problean could be more easily developing into adolescent substance uses. 5) Alcohol, cigarette, and drug users showed more misconducts than other adolescents. 6) Most adolescents believe theat drinking is necessary for making friends(55.0%), while smo-king is just for killing time(50.9%) 7) Drinking, smoking, and other substance users were found to develop into more proble-matic habits. Conclusion : The present survey and several others show that adolescent substance uses in Korea are on the rise. Therefore, extensive counter-measures will be necessary followed by nationwide epidemiological survey of the pending issue, with the psychiatrists participating in the campaign.

상완골 간부 골절 불유합의 금속판과 자가골 이식에 의한 치료 결과

이광현,이성필,김형종,이봉근,김주학 대한골절학회 2004 대한골절학회지 Vol.17 No.2