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Effect of Glass Frit in TiO<sub>2</sub> Electrode for DSSCs
김종우(Kim, Jongwoo),전재승(Jeon, Jaeseung),김동선(Kim, Dongsun),황성진(Hwang, Seongjin),김형순(Kim, Hyungsun) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
Dye sensitized solar cells(DSSCs) have been extensively studied due to their various advantages such as low production cost, colorful design, and eco-friendly process. Long optical path length is one of the most effective method to improve light harvest efficiency for DSSCs. Multi-layered TiO₂ nano-structured film with scattering layer has been studied to generate scattering effect by many researchers. It was expected that the difference of refractive index between TiO₂ particles and glass frit would generate the light scattering effect and provide the long optical path length. Therefore, to enhance the scattering effect, the frits of Bi₂O₃-B₂O₃-ZnO glass system that has the different refractive index were added to TiO₂ pastes in this study. First of all, the absorbance and haze factor of TiO₂ electrode with dyes and the refractive index of glass frit and TiO₂ were measured, respectively. To study the effect of frits, the efficiencies of DSSCs added glass frit and without glass frit were compared. Our results showed slightly higher efficiency with the different absorbance and haze factor of TiO₂ and glass frit. It was considered that the light scattering effect would be improved with adding frits to TiO₂ paste. Our preliminary studies will be useful for increasing efficiency of DSSCs.
YoungJong Kim,JinKyung Park,WonSub Kang,SuKang Kim,Changsu Han,HaeRi Na,HaeJeong Park,JongWoo Kim,YoungYoul Kim,MoonHo Park,JongWoo Paik 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.1
Objective-Mitochondrial dysfunction is a prominent and early feature of Alzheimer’s disease (AD). The morphologic changes observed in the AD brain could be caused by a failure of mitochondrial fusion mechanisms. The aim of this study was to investigate whether genetic polymorphisms of two genes involved in mitochondrial fusion mechanisms, optic atrophy 1 (OPA1) and mitofusin 2 (MFN2), were associated with AD in the Korean population by analyzing genotypes and allele frequencies. Methods-One coding single nucleotide polymorphism (SNP) in the MFN2, rs1042837, and two coding SNPs in the OPA1, rs7624750 and rs9851685, were compared between 165 patients with AD (83 men and 82 women, mean age 72.3±4.41) and 186 healthy control subjects (82 men and 104 women, mean age 76.5±5.98). Results-Among these three SNPs, rs1042837 showed statistically significant differences in allele frequency, and genotype frequency in the co-dominant 1 model and in the dominant model. Conclusion-These results suggest that the rs1042837 polymorphism in MFN2 may be involved in the pathogenesis of AD.
운행차 부하검사를 통한 매연도 및 NOx 상관성 분석 연구
김종우(Jongwoo Kim),김승열(Sungyul Kim),김계현(Gaehyun Kim) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
The current in-use vehicle emission legislation of diesel vehicle in Korea regulate smoke emission only. In this reason, questionable expedients ways are used to reduce the smoke emission to meet the emission standard at the periodic technical inspection emission test site. Cause of trade-off relationship between smoke and NOx, if smoke is reduced by intentional modified the emission system of the test vehicle, Nox emission increase remarkably at the test diesel vehicle. This paper describes the correlations of smoke and NOx characteristics of diesel vehicle that was removed EGR valve and air cleaner intentional purpose during Kd-147 mode, in-use emission testing mode of light-duty diesel vehicle in Korea, Results from these tests show that Nox emission increase 430% higher in the case of removing egr valve whereas smoke is reduced 76% at the test vehicle.
SeungYup Lee,KyoungHoon Kim,Tae Kim,SunMin Kim,JongWoo Kim,Changsu Han,JiYoung Song,JongWoo Paik 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.4
Objective-Non-adherence to medication is a recognized problem in psychiatric patients and may be one of the most challenging aspects of treatment for patients with schizophrenia. Failure of follow-up care after discharge greatly increases non-adherence to prescribed medications, relapse and rehospitalization. However, it is still unknown whether and how much outpatient follow-up visits can mitigate the risk of rehospitalization. Therefore we sought to investigate the continuity and effectiveness of outpatient care after inpatient discharge and its effect on rehospitalization of patients with schizophrenia. Methods-Data were extracted from National Health Insurance Claim Database covering the period from 2007 through 2010. We identified 10,246 patients aged 18 years or older who were admitted in psychiatric facilities with the diagnosis of schizophrenia between January 1 and December 31 in 2007. The number of outpatient visits within 60 days after discharge from index admission was defined as the indicator for the continuous care and rehospitalization was inspected during the following 36-month period. Cox’s proportional hazard model was used to examine the factors affecting the risk of rehospitalization including the number of outpatient visits, age, sex, comorbidities, antipsychotics, and characteristics of medical institution. Results-We found that 12.7% (n=1,327) of the patients visited psychiatric outpatient department once within 60 days after hospital discharge, 34.8% (n=3,626) twice, and 27.8% (n=2,900) more than three times. Patients taking atypical antipsychotics showed higher proportion in 2 or more outpatient visits, whereas patients taking typical antipsychotics showed higher proportion in one or no outpatient visits. Cox hazard ratios of rehospitalization for the factor of 3 or more outpatient visits referenced to that of no follow-up visit were 0.567 (0.428–0.750, 95% confidence interval) within 90 days, 0.673 (0.574–0.789) within 180 days, 0.800 (0.713–0.898) within a year, 0.906 (0.824–0.997) within 2 years, and 0.993 (0.910–1.084) within 3 years. Conclusion-Although continuous outpatient treatment is important for relapse prevention, patients with schizophrenia showed a low rate of outpatient visit as 62.6% of total patients in 2 or more visits within 60 days after discharge. Lack of follow-up treatment might lead to increase psychotic symptoms and raised risk of relapse and rehospitalization. Our data suggest that the number of outpatient visits within 60 days after discharge in patients with schizophrenia is an important indicator of rehospitalization within a year. Therefore, further efforts to examine factors affecting failure of outpatient follow-up after discharge are warranted.
김종우,김주한,김홍기,박래현,박석윤,이낙영,이석훈,이주호,정현용 충남대학교 기초과학연구소 1999 忠南科學硏究誌 Vol.26 No.1
In the 1998 academic year, 33 college junior in the department of statistics who are taking the course of sample theory are divided into 7 groups. And each group conducts a survey which contains all the process of sampling design, such as typing text, customizing color, using icons and clip art and even adding their favorite link The result is an attractive colorful website. [http://stat.chungnam.ac.kr/~sypark]