마이크로-플레이트릿 광간섭 안료를 이용한 태양광용 고투과 컬러 유리에 대한 연구

신동윤(Dong-Youn Shin),이진섭(Jin-Seob Lee),신창수(Chang-Soo Shin),성창환(Chang-Hwan Seong) 대한기계학회 2020 大韓機械學會論文集B Vol.44 No.7

인위적인 기후 변화를 유발하는 이산화탄소 배출량을 줄이기 위해 제로에너지 건축이 법제화 되었으나, 종래의 건물 일체형 태양광 모듈은 태양광 발전 효율을 최대화하기 위해 흑색으로만 제작되었기에 심미성을 중요시하는 건축물의 외관에 적용하는데 장애물이 되어왔다. 본 연구에서는 마이크로-플레이트릿 광간섭 안료를 이용한 태양광용 고투과 컬러 유리의 제작에 대해 소개하도록 한다. 광간섭 안료의 함량이 광학 투과율에 미치는 영향을 조사함으로써 색상을 구현하는데 요구되는 광간섭 안료의 최소 함량을 결정하였다. 3wt% 광간섭 안료 함량의 컬러 유리로 태양광 모듈을 제조하고 전기적 특성을 측정하였다. 마이크로-플레이트릿 광간섭 안료의 사용은 진공 증착 다층 박막 적층법으로 색상을 구현하는 방식보다 저렴한 인쇄 공정을 적용할 수 있기 때문에 제조 비용을 절감할 수 있으며, 발전 효율도 기존 태양광 모듈의 76.15%에 이르렀다. The construction of zero-energy buildings will become mandatory to curtail the amount of CO₂ emissions, which lead to anthropogenic climate changes. However, conventional building-integrated photovoltaics are monotonously black in color to ensure high photoconversion efficiency. Hence, this has been a hurdle in aesthetically decorating the skin of a building. In this study, a micro-platelet light-interference pigment is explored for the fabrication of a highly transparent color glass for photovoltaic applications. The impact of pigment concentration on optical transmittance is investigated and the minimum pigment concentration for realizing a vivid color is determined. A photovoltaic module is fabricated using a color glass with a pigment concentration of 3 wt%, and its electrical properties are measured. The use of a micro-platelet light-interference pigment lowers the fabrication cost (by using a printing process) when compared to that of a costly color glass with multi-layered thin films deposited in vacuum. Furthermore, the relative photoconversion efficiency of the proposed method when compared to a conventional photovoltaic module is as high as 76.15 %.

Single Oral Dose Toxicity Evaluation of Leejung-tang, a Korean Traditional Herbal Formula, in Crl:CD (SD) rats

Lim, Hye-Sun,Lee, Mee-Young,Seo, Chang-Seob,Shin, In-Sik,Ha, Hye-Kyung,Huh, Jung-Im,Shin, Hyeun-Kyoo The Society of Korean Medicine 2011 대한한의학회지 Vol.32 No.3

Objective: Leejung-tang (Rechu-to in Japanese) is a traditional Korean herbal formula used for treatment of gastrointestinal disorders such as vomiting, stomach pain, chronic gastritis and gastrointestinal ulceration. The present study was carried out to investigate the potential acute toxicity of Leejung-tang water extract (LJT) by a single oral dose in Crl:CD (SD) rats in compliance with current guidelines. Methods: In the preliminary study, there were no adverse effects such as death, clinical signs, and body weight changes at dose levels of 500, 1000, and 2000 mg/kg/day body weight. Based on the results, a dose of 2000 mg/kg was selected as the toxicological limited dose. LJT was administered once by gavage to male and female rats at dose levels of 0 and 2000 mg/kg bodyweight. During the study period, mortalities, clinical findings, and body weight changes were observed for 14 days following the administration. On day 14 after the treatment, the animals were sacrificed by carbon dioxide overdose and complete gross postmortem examinations were performed. Results: In present study, no treatment-related deaths were observed. There were no adverse effects on clinical signs and body weight changes. In addition, there were no observed gross findings in all groups except for a kidney cyst in the 2000 mg/kg/day female group. Conclusion: The results indicated that LJT did not induce toxic effects at a dose level up to 2000 mg/kg in rats and its median lethal dose ($LD_{50}$) was considered to be over 2000 mg/kg/day body weight for both genders.

Single Oral Dose Toxicity Evaluation of Leejung-tang, a Korean Traditional Herbal Formula, in Crl:CD (SD) rats

Hye-Sun Lim,Mee-Young Lee,Chang-Seob Seo,In-Sik Shin,Hye-Kyung Ha,Jung-Im Huh,Hyeun-Kyoo Shin 대한한의학회 2011 대한한의학회지 Vol.32 No.3

랫드에서 쌍화탕의 급성독성에 관한 연구

김수정 ( Su Jeong Kim ),이미영 ( Mee Young Lee ),신인식 ( In Sik Shin ),서창섭 ( Chang Seob Seo ),하혜경 ( Hye Kyung Ha ),허정임 ( Jung Im Huh ),신현규 ( Hyeun Kyoo Shin ) 대한본초학회 2011 大韓本草學會誌 Vol.26 No.2

Objectives: This study was conducted to evaluate the acute toxicity and safety of Ssanghwa-tang (Shuanhetang in Chinese, Sou-wa-to in Japanese) in Crl: CD Sprague-Dawley (SD) rat though the current regulatory guideline. Methods: In this study, 10 rats of each sex were randomly assigned to two groups of 5 rats each and were administrated singly by gavage at dose levels of 0 and 2000 mg/kg/day of ssanghwa-tang water extract (SHT). After single administration of SHT, mortalities, clinical signs, body weight changes, gross findings were observed for the 15-day period. Results: Acute toxicity tests revealed that a single oral administration of SHT at dose levels of 2000 mg/kg did not affect clinical signs, body weight, and gross findings, evaluating the safety of SHT. The SHT treatment did not result in any toxicologically significant changes in mortality, clinical signs, body weight changes. Conclusions: These results showed that the single oral administration of SHT did not cause any toxic effect at the dose levels of 2000 mg/kg/day in rats. In conclusion, the median lethal dose (LD50) of SHT was considered to be over 2000 mg/kg/day body for both sexes.

전통 흙집의 주거 환경 특성

리신호,송창섭 忠北大學校 農業科學硏究所 2003 農業科學硏究 Vol.20 No.-

The characteristics of temperature, humidity, air, and noises was analyzed to know the residential environment of the earthen house with core walls and wood frameworks The daily variations of temperature and humidity are small The purification effect of room air and the suppression effect of noises are confirmed

에코콘크리트의 독성시험

宋昌燮,李信昊,金明煥 忠北大學校 農業科學硏究所 2003 農業科學硏究 Vol.20 No.-

This study was performed to analyze the toxic effects fo ecoconcrete which was developed to be applicate the farm road and agricultural structure's backfill materials To this ends, a series of test was conducted for the soil picked in Hagso, located in Chungbuk province The mixture ratio of ESC was 10%, 20% and 30% by weight of dry soil Produced sample was observed through state of fish by intervals of time From the first toxic test result, singularity symptoms were observed to fish increases with ESC mixture ratio Common symptoms were observed impaired digestion, difficulty in breathing, body color change Specially, singularity symptoms were observed the most notedly in aquarium which mixture ratio 20% After 18 days the second toxic test result, it was found that in number of survival of fish could not observed change in aquarium, excepted ESC mixture ratio 20% Therefore, developed ecoconcrete does not influenced in number of survival of fish

영구자석 가동형 LAM의 설계 및 특성해석

윤신용,이장섭 서울産業大學校 1999 논문집 Vol.49 No.2

This paper is concerned with the analysis of a moving magnet type linear DC motor(MM type LDM) for instrumentation. The permeance method is used to calculate the effective flux density in air gap. The design of these linear actuator is optimized for maximum force to displacement and for value to which the current in the coil has to be limited to prevent saturation of the iron of the cores. A two dimensional finite-element analysis is used to find the magnetic field distribution. The numerical results have been verified by experiments.

정신분열병 환자의 주관적 증상과 객관적 정신병리와의 관련성

주연호,김용식,정성훈,신민섭,이창인 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.4

연구목적 : 주관적 증상평가도구인 K-FBF(Kyung Hee-Frankfurter Beschwerde-Fragebogen)가 정신분열병 환자의 어떤 증상 영역을 반영하는지, 특히 정신분열병의 병태생리와 밀접한 관련을 가지며 객관적 평가도구로는 파악이 어려운 음성 증상 또는 인지 장애의 측면들을 반영하는지 조사하고자, 정신분열병 환자의 K-FBF 결과를 객관적 정신병리 평가도구인 PANSS(Positive and Negative Syndrome Scale for Schizophrenia), 대표적인 자기보고식 다차원 증상목록(multidimensional self-report symptom inventory)인 간이정신진단검사(SCL-90-R)의 평가 결과와 비교 분석하였다. 방 법 : 고졸이상의 학력으로 DSM-IV진단기준에 의한 정신분열병 환자 중 급성기가 경과한 66명을 대사으로 연구를 수행하였다. K-FBF, SCL-90-R을 시행한 날, 두 명의 정신과 의사가 PANSS를 수행하였다. K-FBF의 질문항목에 대한 반응양상을 조사하고, 10개 소척도에 대하여 요인분석을 시행하였다. K-FBF와 연령, 성별, 병식과의 상관관계를 조사하였다. 또한, K-FBF, PANSS, SCL-90-R제반 척도간에 상관관계 분석을 시행하였다. 결 과 : K-FBF는 높은 연령일수록 호소하는 항목의 수나 그 정도가 감소하였으며, 유병기간을 조절변수로 삼았을 때도 동일한 결과를 보였다. K-FBF의 소척도를 요인분석하여 두개의 합산척도를 추출, 각각 자각된 고통(RD, Recognized Distress)과 지각왜곡(PA, Perceptual Alteration)으로 명명하였다. 위의 합산척도와 PANSS의 상관관계에서, K-FBF 표준화 총점을 조절변수로 하여 편상관을 조사한 결과 PA척도와 PANSS 음성척도가 상관관계를 보였다. 이는 Huber의 기본증상이란 정신분열병의 음성증상을 주관적 측면에서 접근한 것이라는 평가와 관련된다. 한편, K-FBF표준화 총점과 SCL-90-R총점은 강한 상관관계를 나타낸 반면, SCL-90-R총점과 PANSS총점은 비록 통계적으로는 유의하지만 매우 미미한 상관관계만을 보였다. 따라서 평가척도의 상관성은 그 내용보다는 평가하는 주체에 더 큰 영향을 받는다고 판단되었다. 결 론 : 본 연구결과 K-FBF로 측정된 Huber의 기본증상은 정신분열병의 음성증상을 보다 더 반영하는 것으로 평가되었으며, 또 객관적 평가도구인 PANSS보다는 자기보고형 도구인 SCL-90-R과 더 높은 상관관계를 보인 것으로 나타났다. 그러나, 본 연구결과의 일반화를 위해서는 다른 질병단계, 다른 인구학적 변인을 가진 환자들을 대상으로 한 연구가 계속되어야 할 것이다. Objectives : Kyung Hee-Frankfurter Beschwerde-Fragebogen(K-FBF) is a representative subjective symptom measuring tool of schizophrenic patients. We performed psychopathology measurements using K-FBF, Positive and Negative Syndrome Scale(PANSS) and Symptom Checklist-90-Revised(SCL-90-R) in patients with schizophrenia and then compared the results of these three examinations one another, in order to examine which psychopathologic aspects K-FBF might reflect and to measure the possibility whether this instrument reflect the negative symptoms or cognitive impairments, which are difficult to measure by conventional objective instruments measuring psychopathology. Methods : All 66 patients satisfying DSM-IV criteria for schizophrenia, were approached. Their education level was more than high school and they were not in the acute stage of schizophrenia. They performed K-FBF and SCL-90-R, and at the same day, they were interviewed by one of both psychiatrists using PANSS. We examined the patterns of K-FBF response and performed facor analysis about 10 subscales. We examined the correlation between K-FBF and age, sex and insight. Also, we performed correlation analysis among the K-FBF, PANSS and SCL-90-R. Results : As for K-FBF, with increasing age, the number of positive response items and the symptom severity were decreased. Even when controlling prevalence period as control variable, the correlation remained unchanged. Performing factor analysis to the K-FBF subscales, we created 2 factors, ie summation subscales. We named those recognized distress(RD) and perceptual alteration(PA) each. Using K-FBF standardized total scores as controlling variable, we performed partial correlation between PA and PANSS negative symptom scale. The result was PA and PANSS have statistically significant correlation. This correspons with the view that Huber's basic symptoms are reflecting subjective approach of negative symptoms of schizophrenia. While K-FBF standardized total scores and PANSS total scores had statistically strong correlations, SCL-90-R total scores and PANSS total scores had statistically significant, but very mild correlations. So, we had the judgement that the correlations among the psychopathology measurement tools are more influenced by the rater than the contents of tools. Conclusion : We concluded that Huber's basic symptoms, measured by K-FBF, reflect more negative symptoms of schizophrenia than other symptoms. And K-FBF has more correlation with the PANSS, objective psychopathology. Measuring tool, than the SCL-90-R, self-report quetionnaire. But, more studies using patients with another disease stages and another demographic variables are needed in order to generalize the results of this study.

폐장 유상피 혈관내피종 1예

김상훈,심대중,금주섭,서원태,임시영,이승세,장운하,오태윤,국신호 대한내과학회 1999 대한내과학회지 Vol.57 No.1

Epithelioid hemangioendothelioma(EH) is a rare vascular tumor of low-grade malignancy. It was previously described as intravascular bronchioloalveolar tumor (IVBAT). But electron microscopic study and immunohistochemical staining results have proved endothelial origin. Patients are usually asymptomatic and the tumors are found incidentally on routine chest X-rays. Most patients show a slowly progressive clinical course, even though some patients occasionally die as results of respiratory failure or extrathoracic complications. Confirmative diagnosis is made through thoracoscopic or open-lung biopsy. There is still no effective therapeutic modality for pulmonary EH. We have experienced a 55-year-old woman whose simple chest x-ray film revealed bilateral multiple small nodules. The nodules were histopathologically and immunohistochemically diagnosed as primary epithelioid hemangioendothelioma of the lung. The possibility of metastatic disease was excluded thorough clinical, laboratory and radiological studies. Comparison of radiographic chest film taken 3 years ago showed no significant progression of the pulmonary nodular lesions. Conservative management was instituted and careful 4 months follow-up showed no significant changes.

한국 성인을 대상으로 한 전산화 Standard Progressive Matrices의 표준화 예비연구

홍경수,이민수,오병훈,하규섭,유한익,이창욱,연병길,김성윤,신민섭,김재진,권준수 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.5

연구목적 : 전산화 Standard Progressive Matrices(SPM) 검사의 한국인 성인 표준자료를 확립함으로써, 간이로 지능을 평가하는 경우에도 보다 정확하게 지능지수를 추정하기 위해서 본 연구를 수행하였다. 방 법 : 18세 이상의 남녀 정상인 자원자 353명을 대상으로 전산화 SPM 검사를 시행하고, 백분율 및 표준점수(T-점수)를 기준으로 하여 표준화 자료를 작성하였다. 전체 대상군을 성별, 연령별로 구분한 후 평균과·분포가 유사한 집단은 군을 합치는 방법을 사용하였다. 한국인 표준자료에 근거하여 추정한 SPM 지능지수와 외국인 표준자료에 근거하여 추정한 SPM 지능지수를 각각 KWAIS 지능지수와 비교함으로써 타당도를 검증하였다. 결 과 : 18∼30세, 31∼40세, 41∼50세, 51세 이상의 연령군으로 구분된 한국 정상 성인의 SPM 표준화 자료를 산출하였다. 본 연구 결과에 의한 표준화 자료를 적용하여 지능지수를 추정하는 것이 현재 사용하고 있는 외국인의 표준화 자료를 이용하는 것보다 KWAIS 지능지수에 더욱 근접한 결과를 보였다. 결 론 : 18세에서 50세까지의 한국인 남녀에게는 간이지능평가도구로서 전산화 SPM 검사의 한국인 표준화 자료를 유용하고 타당하게 적용할 수 있음을 확인하였다. Objectives : We conducted this study to provide standardized data of the computerized Standard Progressive Matrices(SPM) test in Korean adults. Methods : The computerized SPM test was administered to 353 healthy volunteers aged 18 years over. We provided the standardized data(percentile and standardized T-scores) for the groups with similar mean and distribution of SPM scores, which was originally divided by age and sex. The validity of the new standardized data was tested by comparing IQs estimated by SPM and K-WAIS. Results : The standardized SPM data were provided for four age groups : 18 to 30 years, 31 to 40 years, 41 to 50 years, 51 years and over. IQ estimated by this standardized data tends to be closer to IQ by K-WAIS than the IQ estimated by foreign normative data. Conclusion : The standardized data of the computerized SPM were proven to be a useful and valid tool for measuring IQ briefly, compared with the conventional way of measuring IQ.