LaCrO₃후막 소자의 가스에 대한 감지 특성

장재영,박기철,신정호,김정규 慶尙大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.14 No.-

LaCrOa₃ thick-film sensors were fabricated on an alumina substrate by the screen printing method. The sensitivities for gases were investigated by varying the heat treatment temperatures of the films. The sensitivities of LaCrO₃ thick-film for ?? and NH₃ gases were better than those for CO and NO gases. The best condition of heat treatment was 450℃ and the optimal operating temperature of LaCrO₃ thick-film for the highest sensitivity was 400℃. Sensitivities of LaCrO₃ thick-film about at 3000ppm for ?? and NH₃gases were 85% and 95%, respectively.

아산시 5대 저수지의 오염부하량 산정을 통한 수질오염 요인분석

장봉기;김민중;최재호;이종화 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.2

Five great reservoirs located in Asan city (Gungpyeong, Gahye, Togo, Masan, Bongjae) for each of the inflow of water pollutants (biochernical oxygen demand (BOD), suspended solids (SS), total nitrogen (T-P), total phosphorus (T- P) in units of pollutant loads were calculated by estimating. The results were as follows; The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 58.7%, 85.4%, 59.1% and 91.2%, respectively of total water pollution load in the reservoir Gungpyeong. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 96.1%, 97.6%, 96.2% and203rmb 99.5%, respectively of total water pollution load in the reservoir Gahye. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 93.8%, 96.9%, 91.7% and 98.7%, respectively of tot~l water pollution load in the reservoir Togo. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 39.3%, 71.6%, 52.2% and 76.2%, respectively of total water pollution load in the reservoir Masan The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 96.3%, 98.5%, 96.2% and 99.5%, respectively of total water pollution load in the reservoir Bongjae. Total amounts of each water pollutants was highest in the basin of reservoir Bongjae and the next Gahye, Togo, Masan. Reservoir Gungpyeong was lowest in five reservoirs located in Asan Clty. These results suggest that contamination of the reservoir inflow in Asan city, water pollution management for the reservoirs will be focusing on the livestock wastewater.

고등학생의 환경에 대한 인지도에 따른 환경오염 방지를 위한 실천도

장봉기;최재호;박상일 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.1

In this study, high school students' recognition of the environment by looking out, practical help for evaluation the relationship between environmental education and the issue is to establish policy. Regarding the results that high school students recognition of the environmental terms, the pollution degree of recognition about the cause of the higher interest, higher environmental practice was also affecting.

R.F. magnetron sputtering법으로 제조한 LaCoO₃박막의 가스감지 특성

장재영,신정호,김정규,박기철,전춘배 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

LaCoO_(3)(LCO) thin film sensors were fabricated on an alumina substrate by the r.f. magnetron sputtering. By varying the annealing temperature of the LCO films from 600℃ to 1000℃, we investigated X-ray diffraction pattern, electrical properties, and gas sensing properties of the films. The crystallinity was improved and the activation energy was increased with increasing the annealing temperature. The sensitivity of the LCO films for NH_(3) and CO gases was also increased with the annealing temperature. Sensing properties of LCO thin films were improved when the measuring temperature was 350℃ or more.

만성 호중구성 백혈병 1례

기장도,박치영,류보열,김태종,모성환,곽재정,문철호,박근홍,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.1

Chronic neutrophilic leukemia is a very rare myeloproliferative disorder which is characterized by severe sustained mature neutrophilic leukocytosis in peripheral blood (PB), hepatosplenomegaly, elevated leukocyte alkaline phosphatase, serum uric acid. serun viatmin B 12 and the bleeding tendency despite normal platelet count and coagulation time, absence of philadelphia chromosome, and the absence of fever or underlying infection or disease sufficient to mimic a leukemoid reaction. We have experienced a 34-years-old male patient with atypical chronic neutrophilic leukemia. On admission, the leukocyte count was 56,860/uL. severe neutrophic leukocytosis with 76% neutrophils and rare immature forms on PB smear. Many neutrophils had toxic granules, and vacuoloes. Leukocyte alkaline phosphatase score was decreased. The cytogenetic study showed Philadelphia chromosome negative with normal karyotype.

남ㆍ여 고교 축구선수들이 받는 스트레스 원인과 해소방법에 관한 연구

장재훈,부기원 강원대학교 체육과학연구소 2001 江原大學校附設體育科學硏究所論文集 Vol.- No.24

This research has the purpose of finding out the cause of stress which is inflicted on men · women soccer players in high schools. To turn out reliable calculations of average and standard deviation, I used the data collected through questionnaires which are answered by the total number of 472 soccer players(284 men in a high school, 188 women in a high school), and the conclusion was reached with the t-test for statistical verification. Among the cause of stress imposed on soccer players of man's high schools, the most stressful low-factor is when they lost the game, while among woman's high school soccer players, it is when they are despised by the others, and the least stressful factor is the problem with the other sex. The difference of the causes of stress classified by factors reveals that the athletics performance factor is the highest for both the groups of soccer players of women's high schools and colleges. The factor with the most meaningful difference between both the groups of women soccer players is before-competition factor(girl's high school: 2.48±.68, boy's high school: 2.14±1.17), with the meaningful difference at the level of t=-3.64, p<.001, and the rest of the factor don't make any meaningful difference. The stress-mitigating method which soccer players have chosen the most is thinking the matter over and over, but the lowest chosen by them is depending on smoking and drinking. The difference of stress-relieving methods classified by factors demonstrates that the clarification of the causes of stress is the highest factor for both the groups of soccer players. The factor with the most meaningful difference between both the groups is conversation(girl's high school: 2.06±.77, boy's high school: 1.79±.76), with the meaningful difference at the level of t=-3.670, p<.001, and the compensate factor is the next(girl's high school: 2.24±.82, boy's high school: 2.04±.77), with the meaningful difference at the level of t=-2.683, p<.009, and the physical factor is(girl's high school: 2.04±.61, boy's high school: 2.17±.60), with the meaningful difference at the level of t=2.373, p<.018. Therefore, the fact that boy soccer players get much of serious stress from the result of competition tells us that we should be more careful about our words and deeds in the field service. In addition, fear of failure acts greatly as the cause of stress, which requires a preventive alternative through psychological training. Finally, it is thought that it is necessary to make athletics performance ability maximized by making the most of healthy leisure hours.

자동생화학 분석기 Biotechnica Instruments 1000dml rjawjd

장철수 김천대학교 2010 김천대학교 논문집 Vol.31 No.-

he authors evaluated a recent introduced chemical analyzer, Biotechnica Instruments 1000 (BT-1000) by analyzing the levels of GOT, GPT, creatinine, cholesterol and triglyceride in both pooled serum and SER-T-FY control serum. The accuracy was good maintained within a range of significant levels. The linearity was well maintained within a range of medical significant levels. The within-run coeffi- cients of variations (CVs) at low and high concentrations were less than 6.5%. The between-run coefficients of variations at low and high concentrations were less than 7.9%. The coefficient correlation of GOT, GPT, creatinine, cholesterol and triglyceride levels from BT-1000 or Olympus AU 400, which is a usual instrument for determing the levels of clinical makers, were from 0.971 to 0.988. The accuracy, linearity, precision and correlation of BT-1000 were good. It is con-cluded that BT-1000 analyzer can be used for clinical laboratories.

한국인에서 혈청 중성지방, 복부비만과 허리둘레의 상관성연구

장철수 ; 류재기 ; 박갑태 김천대학교 2015 김천대학교 논문집 Vol.36 No.-

Purpose: The purpose of this study was to determine the association between serum triglyceride, abdominal obesity, and waist circumference in Korean. Method: A total of 168 healthy examinees that enrolled in this study were examined at Gimcheon Medical Center from July 2012 to December 2013. Waist circumference (WC) and body mass index (BMI) of subjects were measured as well as blood pressure, fasting blood sugar level, High Density Lipoprotein (HDL-cholesterol), Low Density Lipoprotein (LDL-cholesterol), cholesterol, and C-reactive protein (CRP). Results: In men, WC(p<0.011) had a significant correlation with triglyceride and BMI(p<0.001) had a significant correlation with triglyceride. In women(p<0.001), WC and BMI had a significant correlation with triglyceride. In men, triglycerides (r=0.501, p<0.011) had a positive correlation with WC. However, CRP (r=0.407, p<0.001) had a positive correlation with BMI. In women, triglycerides (r=0.470, p<0.001) and CRP (r=0.367, p<0.001) had a positive correlation with WC. Conclusion: Therefore, WC and triglyceride may be the most effective anthropometric indices for screening Korean people in regards to obesity.

인간 면역부전 바이러스(HIV) 감염자 사이에서의 1기 및 2기 매독의 유행

장희창,조재현,박완범,이기덕,이창섭,김홍빈,오명돈,최강원 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

목적 : 국내 HIV 감염자 사이에서 발생한 매독의 유행을 보고하고, 그 역학적 특성을 규명하고자 하였다. 재료 및 방법 : 1999년 7월부터 2003년 9월까지 서울대학교 병원에서 추적 관찰을 받아온 HIV 감염자를 대상으로 하여 1기 및 2기 매독의 발생을 조사하였다. 발생률을 정확히 구하기 위해 추적 관찰을 받은 모든 HIV 감염자의 인년을 6개월 간격으로 구하였다. 결과 : 51개월 동안, 465명의 HIV 감염자가 서울대학교 병원에서 추적 관찰을 받았다. 이중 38명이 1기 및 2기 매독으로 진단되었다. 1기 및 2기 매독의 발생률은 이기간 동안 100인년 당 4.1명이었다. 1999년 7월부터 2001년 12월 사이에는 발생자가 없었으나, 이후 발생률은 꾸준히 증가하여 2003년 9월에는 100인년 당 18.8명이 되었다. 1기 및 2기 매독의 발생률은 동성애자 및 양성애자에서 이성애자에서보다 4.3배 높았고, HAART로 치료를 받지 않은 환자에서 HAART로 치료를 받고 있던 환자에서 보다 10.9배 높았다. 결론 : 2002년부터 국내 HIV 감염자 사이에서 1기 및 2기 매독이 유행하기 시작하였고, 이러한 유행은 동성애자와 양성애자 및 HAART로 치료를 받고 있지 않던 사람 사이에서 발생하였다. Background : This study was performed to characterize the epidemiologic and clinical features of outbreak of syphilis among HIV sero-positive patients in Korea. Materials and Methods : A retrospective case review of patients diagnosed with primary and secondary syphilis from July 1999 to September 2003 was carried out at Seoul National University Hospital in Korea. To estimate the incidence, person-years (PYs) of all HIV sero-positive patients, who visited the hospital in the same period, were calculated every 6 months. Results : In a 51 month period, 465 HIV-positive patients were followed up at Seoul National University Hospital. 38 cases of primary and secondary syphilis were diagnosed. The incidence of primary and secondary syphilis was 4.1 per 100 PYs during the study period. There was no case from July 1999 to December 2001, and then the incidence rose until September 2003 from 5.5 per 100 PYs in 1999 to 18.8 per 100 PYs in 2003. The rate of primary and secondary syphilis was 4.3 times higher among homosexual and bisexual men than heterosexual men (95% CI 1.87 to 11.17), and 10.9 times higher among patients who did not receive HAART than patients who were receiving HAART (95% CI 5.47 to 21.79). Conclusion : The outbreak of primary and secondary syphilis among HIV-positive patients started in 2002 and has been escalating, especially among homosexual/bisexual men and in patients who did not receive HAART.

동양 전통과학의 탐구방법론 연구 : 朱子의 格物致知論을 중심으로

최영제,이우붕,정원우,김용수,문장수,방경곤,김기정 경북대학교사범대학과학교육연구소 2005 科學敎育硏究誌 Vol.29 No.-