마에 의한 비염,구강 알레르기 증후군이 동반된 천식 증례

석수진,박종숙,김덕수,손범석,박춘식 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.2S

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Inoue Balloon을 이용한 PMV의 장·단기 결과 분석

진은선,이연아,전숙,김현숙,정승묵,박상선,최락경,임달수,홍석근,황흥곤 대한순환기학회 2003 Korean Circulation Journal Vol.33 No.11

삼척시 원덕읍 주민을 대상으로 한 류마티스 관절염 및 종양 진단

문수인,이도영,강진석 남서울대학교 2012 남서울대학교 논문집 Vol.18 No.1

Diagnosis of rheumatoid arthritis and cancer requires specific proteins as antigens and it has been developed by using a rapid detection kit and latex agglutination which identify circulating antibodies in the blood sera. In this study conducted by Namseoul University Health Medicine Care Service in October 2010, with the residents in Wondeok-eup, Samcheok city, Kangwon-do, the rapid diagnosis of the rheumatoid arthritis and cancer was performed by analyzing patients' blood sera. Rheumatoid arthritis and cancer were diagnosed in 3 and 1 patients, respectively in a total of twenty-six persons. In the rapid diagnosis of rheumatoid arthritis using by latex agglutination, there were one positive case of C-reactive protein (CRP), one positive case of Rheumatoid factor (RF) and one positive case of both CRP and RF detected. In the rapid diagnosis of cancer, one positive case of prostate specific antigen (PSA) was observed. Key Words : Diagnosis, Kit, Rheumatoid arthritis, Cancer

저수축형 폴리머 콘크리트의 제조 및 물리·역학적 특성

연규석,이윤수,최동순,정경현,황진하 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

본 연구에서는 폴리머 콘크리트의 수축저감을 목적으로 수지량, 수축저감제함량과 S/a 비등을 변화시켜 경화수축의 변화와 강도 특성을 실험적으로 구명하였다. 경화수축량은 수치량이 105%일 때 보다 11.5%일 때, 즉 수지량이 증가할수록 커짐을 알 수 있었다. 수축저감제의 첨가에 따른 경화수축량은 감소함을 알 수 있었다. B10.5-SR10일 경우 수축저감제가 첨가되지 않았을 때 보다 약 30%, B10.5-SR20 일 경우 약 53%, B11.5-SR10일 경우 약 31%, B11.5-SR20 일 경우 약 47% 정도의 수축저감의 효과를 볼 수 있었다. S/a 비에 따른 경화 수축챨ㅇ은 S/a 60일 때 가장 적은 값을 보였으며, S/a 50, S/a 40 일때는 S/a60 일 때 가장 적은 값을 보였으며, S/a 50, S/a 40일 때는 S/a 60일 때 보다 각각 10%, 30% 정도 수축량이 증가함을 알 수 있었다. 압축 및 휨 강도특성은 수지량이 증가할수록 높아지고, 수축저감제의 첨가량이 증가할수록 낮아짐을 알 수 있었다. S/a 비에 따른 강도 특성은 압축강도와 휨강도 모두 S/a 비가 60일 때 가장 큰 값을 보였으며, S/a 비가 50,40 순으로 감소하였다. Many different polymer based concrete materials are known today, but the large setting or hardening shrinkage of polymer concrete is a problem to overcome in their practical applications. The setting shrinkage reaches about five to ten times the drying shrinkage of ordinary cement concrete, i.e, 50 to 60 ×10^4. This paper deals with a reduction in the hardening shrinkage of unsaturated polyester resin concrete which is treated with respect to shrinkage-reducing agent content, S/a ratio and catalyst content, and tested for length change during hardening, and flexural and compressive strengths. It is shown that the change of shrinkage-reducing agent content and S/a ration the length change of the unsaturated polyester resin concrete during hardening.

국내에서 파상풍의 연령별 면역혈청학적 역학연구

강진한,허재균,김종현,이경일,박수은,마상혁,이명숙,반상자,홍성화,조대현,이성호 대한감염학회 2001 감염 Vol.33 No.2

Background : The incidence of tetanus in adults and neonatal tetanus have been markedly reduced by world-wide use of DTP vaccines. But, tetanus is still one kind of major health problems in many developing countries, and several serosurvey stduies in developed ountries revealed that substantial proportions of adult opulation may lack immunity against tetanus and imunity level against tetanus is continuously decreasing by age. In Korea, tetanus outbreaks have been disappeared since the 1980s by high acceptant DTaP vaccination rates. Annually, few tetanus patient has been reported since 1990s. But, there knave been no seroepide-miological studies to tetanus, no trials to assess tetanuts immunizations. And we do not use Td vaccine in adults for maintaning tetanus immunity. In this aspect, we conducted age related survey of immunity to tetanus and indirectly assessed the immunogenecity of tetanus vaccines, used in Korea. Methods : For the evaluation of age related sero-survey of tetanus immunity in Korean population, study subjects were classified into 16 groups (A∼J group; below 10 years with one year interval, K∼O group; 11~60 yrs with 10 years interval, p group; over 60 yrs). The numbers of each group were 100, and sex distributions of each group were almostly equal. And far the indirect assessment of tetanus immunization in Korean children, children under 15 years old age were classified into 6 groups (I∼VI) according to the status of DTaP vaccination. The numbers of this each group were 50, and sex ratio was almostly equal. Specific IgG antibody to tetanus toxin were detected by ELISA. And the ANOVA repeated t-test was used to compare antibody levels in study groups. Results : In age related groups, the antibody levels to tetanus toxin were well maintained until 20 years old age group (L group), but thereafter the titers abruptly decreased below 0.1 IU/mL and over 75% populations among the groups over 30 years old age needed maintenance of protective immunity to tetanus. The antibody level of male was statistically higher than that of female in P group. In the groups related DTaP vaccination status, the antibody titer was very low in pre-vaccination group (I), but the titers after primary vaccinations were sharply increased and highly maintained until 15 years. Conclusion : The results of our study revealed that the immunity to tetanus was dramatically decreased in age groups over 30 years old. This result indicates that Td vaccination program in adults should be considered for maintenance of immunity to tetanus. And our study indicate that DtaP vaccination programs and vaccines, used in Korea, are effective for acquisition and maintenance of tetanus immunity in Korean children. (Korean J Infect 33:104~111, 2001)

흉골골절이 의심되는 외상환자에서 초음파의 진단적 효용성

염석란,김재광,이근,박철완,양혁준,현성열,임용수,진욱 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Purpose: This study compared the value of ultrasonography(US) in the diagnosis of sternal fractures with those of conventional radiography and bone scan. Material and Method: From March 2000 to March 2001, in Gil Medical Center, Gachon Medical College, 44 patients(22 women and 22 men, mean age 46 years, range 5∼81 years) complained of tenderness in the sternal area. The cases histories of these patients with clinically suspected sternal fracture due to blunt trauma were prospectively studied. At the time of admission, conventional radiography(sternal view) was done. At one day after admission, sternal ultrasonography was obtained, and after 4∼5 days, a bone scan was done. Sternal ultrasonographic findings, conventional radiographic findings, and bone-scan findings were compared. In addition, a 12-lead ECG was done. When it was necessary, cardiac enzyme was checked and echocardiography was performed. Result: In 21 of 44 patients(48%), a sternal fracture was found by sternal US. Only 9 of 21 patients (43%) were diagnosed as having a sternal fracture by using conventional radiography. 23 of 44 patients (52%) have negative findings on sternal US; they also had negative findings on conventional radiography. Except for 7 unchecked patients, 13 of 21 patients(62%) were diagnosed as having a sternal fracture by bone scan, and among the 23 patients who had negative findings on sternal US, the 19 patients checked with a bone scan also had negative findings. Conclusion: Sternal US can find sternal fractures that are difficult to find on conventional radiography. Compared with bone scan, sternal US takes a shorter time and sternal US is not difficult. Additionally, combined lesions with sternal fractures(peristernal hematoma, soft tissue swelling) and costar cartilage fractures are diagnosed more easily when using sternal US.

Polystyrene Beads를 사용한 경량 폴리머 시멘트 모르타르의 기초적 성질

연규석,신영수,이윤수,이기원,황진하 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

polystyrene beads를 사용한 경량 시멘트 모르타르의 성질을 개선하기 위해 EVA혼화용 폴리머를 첨가한 모르타르를 제조하여, 물리ㆍ역학적 성질을 살펴보았던 바 polystyrene beads 골재 재부의 공극 때문에 높은 공기량을 보였고, 플로우 값은 폴리머-시멘트비 10%에서 가장 높은 값을 나타냈다. 또한 폴리머-시멘트비가 증가할수록 압축강도와 휨강도는 증가하였고, 시멘트-경량골재비가 낮을수록 압축강도는 증가하였으나, 휨감도에는 크게 영향을 주지 않았다. The objective of this study was to improve performance of lightweight polymer cement mortars by treating with redispersible polymer powders. Lightweight polymer-cement mortars were prepared with respect to different polymer-cement ratios, and tested for water absorption, specific gravity, flexural and compressive strengths, workability and freeze-thaw resistance. Manufactured lightweight polymer-cement mortars in this study showed lower specific gravity and lower thermal diffuseness than ordinary cement mortars. Water absorption, specific gravity, flexural, compressive strengths and workability were measured according to appropriate KS test methods. As a results, the optimum mix ratios for cement-aggregate, polymer-cement, and water-cement were found to be 1:3, 10% and 30%, respectively.

고압 커패시터의 고장 분석을 통한 신뢰도 예측

양석준,김진우,신승우,이희진,신승훈,유동수,장석원 한국비파괴검사학회 2001 한국비파괴검사학회지 Vol.21 No.6

본 논문은 고압 커패시터의 고장분석과 신뢰성 예측 결과를 다루고 있다. 부품의 수명과 고장률을 예측하기 위해서 두 가지 방법으로 고장 모드와 고장 메커니즘을 연구하였다. 에폭시 수지로 성형된 고압 커패시터가 절연내압 시험 하에서 저항이 제로로 되는 고장에 대하여, 근본원인 고장분석 체계를 효과적으로 수립함으로써 고장 메커니즘의 원인을 분석하였다. 특히 세라믹-에폭시 계면에서의 절연파괴 고장 현상이 강조되었으며, 본 연구에서 얻어진 결과의 타당성은 마그네트론에 장착된 고압 커패시터의 열사이클 시험 수행에 의한 가속시험 결과로부터 입증되었다. 시험 결과들은 결함이 있는 로트를 신속히 규명하고 B10수명을 결정하는데 유용하게 사용할 수 있다. 또한, 유전체의 절연파괴에 대해서 부하-강도 간섭모델을 이용하여 고장률을 예측하였다. This paper presents a result of failure analysis and reliability evaluation for high voltage ceramic capacitors. The failure modes and failure mechanisms were studied in two ways in order to estimate component life and failure rate. The causes of failure mechanisms for zero resistance phenomena under withstanding voltage test in high voltage ceramic capacitors molded by epoxy resin were studied y establishing an effective root cause failure analysis. Particular emphasis was placed on breakdown phenomena at the ceramic-epoxy interface. The validity of the results in this study was confirmed by the results of accelerated testing. Thermal cycling test for high voltage ceramic capacitor mounted on a magnetron were implemented. Delamination between ceramic and epoxy, which might cause electrical short in underlying circuitry, can occur during curing or thermal cycle. The results can be conveniently used to quickly identify defective lots, determine B10 life estimation each lot at the level of inspection, and detect major changes in the vendors processes. Also, thd condition for dielectric breakdown was investigated for the estimation of failure rate with load-strength interference model.

평면 후막형 이산화탄소 센서의 감지 특성

홍현석,박동섭,박진수,박종욱 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

한국 연안 퇴적물에서 ^137Cs, ^90Sr 및 Pu 동위원소의 분포

최석원,진현국,김철수,노정환,김창규,노병환 대한방사선 방어학회 2002 방사선방어학회지 Vol.27 No.2

한국 주변 연안 15개 정점의 퇴적물(0∼20 cm)에서 ^137Cs, ^90Sr, ^239+240Pu 의 농도와 농도비를 조사했다. ^137Cs, ^90Sr, ^238Pu 및^239+240Pu의 평균 방사능 농도는 각각 2.24±0.79 Bq·kg^-1-dry, 0.20±0.04 Bq·kg^-1-dry, 0.009±0.005 Bq·kg^-1-dry 및 0.27±0.17 Bq·kg^-1-dry이다. ^137Cs/^90Sr, ^239+240Pu/^137Cs 및 ^238Pu/229+240Pu의 평균 농도 비와 ^239Pu/240의 평균 원자 비는 각각 11.2±2.9, 0.123±0.053, 0.033±0.01 및 0.218±0.036이다. 퇴적물에서 핵종의 농도 범위와 핵종간의 농도 비는 그 동안 주변국가의 퇴적물에서 조사한 값과 비슷하였다. 퇴적물에서 ^137Cs과 ^239+240Pu의 상관계수는 0.80이다. ^137Cs과 SOM, ^239+240Pu과 점토 함량과의 상관계수는 각각 0.69, 0.67 이다. The concentrations and activity ratios of ^137Cs, ^90Sr, ^238Pu and ^239+240Pu in sediment(0∼20 cm) at 15 coastal stations of Korea were determined. The mean concentrations of ^137Cs, ^90Sr, ^238Pu and ^239+240Pu are 2.24±0.79 Bq·kg^-1-dry, 0.20±0.04 Bq·kg^-1-dry, 0.009±0.005 Bq·kg^-1-dry and 0.27±0.17 Bq·kg^-1-dry, respectively. The mean activity ratios of ^137Cs/^90Sr, ^239+240Pu/^137Cs and ^238Pu/^229+240Pu and atomic ratio of ^240Pu/^239Pu are 11.2±2.9, 0.123±0.053 and 0.033±0.017 and 0.218±0.036, respectively. The concentrations and activity ratios in sediment samples are similar to those reported from neighbouring country in the northern hemisphere. The correlation coefficient of ^137Cs and ^239+240Pu is 0.80. The correlation coefficient of ^137Cs and soil organic matter(SOM), and ^239+240Pu and clay content are 0.69 and 0.67, respectively.