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Solvent and Structural Fluctuations Induced Symmetry-Breaking Charge Transfer in a Porphyrin Triad
Kim, Taeyeon,Kim, Woojae,Mori, Hirotaka,Osuka, Atsuhiro,Kim, Dongho American Chemical Society 2018 The Journal of Physical Chemistry Part C Vol.122 No.34
<P>This study aims to show that the symmetry-breaking charge transfer (SBCT) in a donor-acceptor-donor (DAD) porphyrin triad occurs via solvent and structural fluctuations measured by using femtosecond broadband fluorescence upconversion spectroscopy, which can directly trace the origin of the emitting state by monitoring its emission dipole moment as a function of time. While the emission dipole moment of the triad in the excited state remains nearly unchanged in nonpolar solvents such as cyclohexane and toluene, it is significantly reduced in polar solvents such as benzonitrile due to a change in the emitting state from quadrupolar (the exciton coupled state) to dipolar symmetry (the relaxed S<SUB>1</SUB> state). The latter state is formed by the SBCT process of DAD via a combination of solvent and structural fluctuations.</P> [FIG OMISSION]</BR>
김태연(Kim. Taeyeon),김창남(Kim. Chang-Nam),홍구표(Hong. Gu-Pyo),김광호(Kim. Kwang-Ho),노지웅(Rho. Ji-Woong),김병선(Kim. Byung-Seon) 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
The Purpose of this study was to analyze the smoke elimination performance and evacuation time in an arcade of traditional market. In this study, the effect of the opening for the ventilation about the smoke eliminating performance was analyzed using CFD (Computational Fluid Dynamics) method. And also the evacuation time was analyzed according to the height of the building. The opening of the arcade is very important design factor to control the smoke movement.
Hyun Jung Kim(Hyun Jung Kim),Taeyeon Hwang(Taeyeon Hwang) 한국영어평가학회 2022 영어평가 Vol.17 No.2
Washback has been of interest in the field of second and foreign language teaching as well as testing; indeed, it has been widely discussed as one of the key test qualities. While multifaceted aspects of washback have been proposed and examined, there still remain many more unanswered questions because washback should be evaluated in relation to a specific testing and teaching/learning situation. It is therefore worth reviewing prior research and identifying gaps in the literature to address future research on washback, especially in the Korean context. This article first reviews seminal theoretical contributions to the current understanding of washback. It then introduces prior empirical research on two test types: largescale testing and classroom/school-based assessments used in both international and Korean contexts. Whereas the washback effects of representative international large-scale tests have been widely examined worldwide, there have been a limited number of studies on washback involving large-scale and classroom assessments in the Korean context. The primary focus of prior research has been on the perceptions of teachers and learners, while empirical evidence in teaching and learning is still lacking. These comprehensive, critical reviews illustrate washback effects on a range of stakeholders at different stages of teaching and learning, which contribute to addressing the need for future research on washback.
Kim, Taeyeon,Park, Changhoon,Choi, Kyuhyung,Jeong, Jiwoon,Kang, Ikjae,Park, Su-Jin,Chae, Chanhee AMERICAN SOCIETY FOR MICROBIOLOGY 2015 CLINICAL AND VACCINE IMMUNOLOGY Vol.22 No.6
<P>The objective of the present study was to compare the efficacy of two commercial type 1 porcine reproductive and respiratory syndrome virus (PRRSV) modified live vaccines against heterologous type 1 and type 2 PRRSV challenge in growing pigs. Vaccination with a type 1 PRRSV vaccine reduced the level of viremia after type 1 PRRSV challenge but did not reduce the level of viremia after the type 2 PRRSV challenge in pigs. Increased levels of interleukin-10 (IL-10) stimulated by type 2 PRRSV coincided with the low numbers of type 2 PRRSV-specific interferon gamma-secreting cells (IFN-γ-SC) in vaccinated pigs after type 2 PRRSV challenge, whereas low levels of IL-10 stimulated by type 1 PRRSV coincided with high numbers of type 1 PRRSV-specific IFN-γ-SC in vaccinated pigs after type 1 PRRSV challenge. Additionally, vaccination with the type 1 PRRSV vaccine effectively reduced the lung lesions and type 1 PRRSV nucleic acids in type 1 PRRSV-challenged pigs but did not reduce lung lesions and type 2 PRRSV nucleic acids in type 2 PRRSV-challenged pigs. There were no significant differences between two commercial type 1 PRRSV vaccines against type 1 and type 2 PRRSV challenge based on virological results, immunological responses, and pathological outcomes. This study demonstrates that vaccinating pigs with the type 1 PRRSV vaccine provides partial protection against respiratory disease with heterologous type 1 PRRSV challenge but no protection with heterologous type 2 PRRSV challenge.</P>
Nephrotoxicity due to Acyclovir in Chickenpox (Varicella) with pregnant woman
( Taeyeon Kim ),( Songyi Kook ),( Taegyu Ahn ),( Jongyun Hwang ),( Hyangah Lee ),( Dongheon Lee ),( Sunghun Na ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Acyclovir is often used to treat herpesvirus infections, but can induce acute renal failure. Secondary acute renal failure associated with acyclovir is characterized by a rapid increase in serum creatinine (SCr) within 12-48 h after drug administration. Immediate detection of acute renal failure is important to prevent morbidity. We recently encountered a case of acyclovir-induced nephrotoxicity during chickenpox (varicella) infection in a pregnant woman. This is the first report detailing the diagnosis and successful treatment of acute kidney injury secondary to intravenous acyclovir in a pregnant woman during the second trimester.
Kim, Minseok,Leigh, Seung-Bok,Kim,Taeyeon,Cho, Sooyoun Architectural Institute of Japan 2015 JOURNAL OF ASIAN ARCHITECTURE AND BUILDING ENGINEE Vol.14 No.3
<P> This study is aimed at analyzing the impact of effective shading design for office buildings. For shade design, the overheated period for the area in which a target building was located was estimated, the building was configured to be shaded during this period, and a different shading design was applied for each direction. Using this shade design, the daylighting performance and the reduction in cooling loads during the overheated period were evaluated. The daylighting performance was evaluated by employing the daylight factor and useful daylight illuminance (UDI). The results showed a 35% reduction in cooling loads due to the shading device. Regarding the daylight factor, more points were included in a proper daylight factor of 2-5%, which was shown to increase the UDI to 500?2,000 lux. </P>