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Justifying benzoselenadiazole acceptor core as organic semiconductor for stable bulk-heterojunction organic solar cells at ambient temperature

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Journal of Materiomics 2021年第5期7卷 1112-1121页

作者： Abdullah M.Shaheer Akhtar Eun-Bi Kim hyung-shik shin Sadia Ameen Advanced Materials and Devices Laboratory Department of Bio-Convergence ScienceJeongeup CampusJeonbuk National University56212Republic of Korea New&Renewable Energy Material Development Center(NewREC) Jeonbuk National UniversityRepublic of Korea Energy Materials&Surface Science Laboratory Solar Energy Research CenterSchool of Chemical EngineeringJeonbuk National University54896Republic of Korea Korea Basic Science Institute(KBSI) 169-148 Gwahak-roYuseong-guDaejon34133Republic of Korea

This work describes the utilization of D-A-D type organic semiconductor,4,4’-(benzo[c][1,2,5]selenadiazole-4,7-diyl)bis(N,N-diphenylaniline),denoted as Se-2TPA,containing benzoselenadiazole(BSe)as acceptor core and end-capped with triphenylamine(TPA)donor units as donor materials in solar ***,the attachment of TPA donor moiety in BSe acceptor unit enlarged the conjugated system by extending the p-bonding which effectively tuned the optical and electrochemical properties of *** bulk heterojunction organic solar cell(BHJ-OSCs)with configuration of ITO/cp-TiO_(2)/Se-2TPA:PC61BM/Au showed power conversion efficiency(PCE)of~4.12% with short circuit current(Jsc)value of~11.28 mA/cm^(2),open circuit voltage(Voc)of~0.775 V and fill factor(FF)of~*** significantly increased from~4.12% to~5.29% when 1,8-diiodooctane(DIO)was added as an additive in Se-2TPA:PC61BM blend which associated with less phase separation and improved the charge *** fabricated BHJ-OSCs processed with 3%DIO,ITO/cp-TiO_(2)/Se-2TPA:PC61BM/Au configuration displayed a long-term stability under air condition at an ambient temperature by maintaining~80% PCE for the duration of 30 *** advantages of easy synthesis,low cost and promising cell performance supported Se-2TPA as successful organic semiconductor for BHJ-OSCs.

关键词： Benzoselenadiazole Thin film Organic semiconductor Stability Organic solar cells

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Development and Experimental Evaluation of Strip Shape Prediction Model for Sendzimir Rolling Mills

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Journal of Iron and Steel Research(International) 2013年第12期20卷 25-32页

作者： shin Jong-min HAN Seong-ik KIM Jong-shik School of Mechanical Engineering Pusan National University School of Electrical Engineering Pusan National University

It is difficult to obtain the desired strip shape using Sendzimir rolling mills because small diameter work rolls can be easily deformed by the roiling force. To control the strip shape effectively, it is important to understand the relationship between the behavior of the shape actuator and the variation of the strip shape. A numerical model based on the contact element method was proposed for the prediction of strip shape. In this numerical model, the re- lationships between the actuating forces, the roll deflections, the thickness profiles of the entry and exit sides, and the strip shape were considered. The proposed numerical model for strip shape prediction was evaluated by computer simulation and experiment with respect to various AS-U roll and first intermediate roll positions.

关键词： Sendzimir rollingmill double acting AS-U roll strip shape prediction model contact element method

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Synergetic analysis of springtime air pollution episodes over Gwangju,Korea

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Journal of Environmental Sciences 2017年第7期29卷 270-283页

作者： Sung-Kyun shin Kwon-Ho Lee Seung-shik Park Man Sing Wong Research Institute for Radiation-Satellite(RIRS) Gangneung-Wonju National University(GWNU)Gangneung 25457Republic of Korea Department of Atmospheric and Environmental Sciences(DAES) Gangneung-Wonju National University(GWNU)Gangneung 25457Republic of Korea Department of Environment and Energy Engineering Chonnam National UniversityGwangju 61186Republic of Korea Department of Land Surveying and Geo-Informatics The Hong Kong Polytech UniversityKowloonHong Kong

The characteristics of springtime aerosols,including their optical and microphysical properties,were analyzed for the months of March to May of 2009 in Gwangju（35.23°N,126.84°E）,Korea.A high Light Detection and Ranging（LIDAR）-derived aerosol depolarization ratio（δ） of 0.25 ± 0.04 was determined on dust particles during the observation ***？ngstr？m exponent values of the 440–870 nm wavelength pair（？_（440–870）） and single-scattering albedo at 675 nm（Ω_（675）） measured by a CIMEL sun/sky radiometer were 0.77 ± 0.19 and 0.95 ±0.01,*** elevated dust layers reached a maximum elevation of 4 km above sea ***/smoke particles that originated from highly populated/industrialized regions could be distinguished by their relatively smaller particle size（？_（440–870） ranged between1.33 and 1.36） and higher light-absorbing（Ω_（675） of 0.92 ± 0.01） *** aerosols are mostly distributed at altitudes 〈 1.2 *** root-mean-square deviation（RMSD） between the aerosol optical depth（AOD,τ） derived from LIDAR_（（τ_（LIDAR））） and from the CIMEL sun/sky radiometer_（（τ_（CIMEL））） varied with respect to the surface PM10 *** RMSD between τ_（LIDAR） and τ_（CIMEL） was as low as 13% under lower PM_（10） concentration levels（〈 100 μg/m^3）.In contrast,the RMSD between τ_（LIDAR） and τ_（CIMEL） increased three times（~31%） under high surface PM_（10） concentration levels（〉100 μg/m^3）.These results suggest that the accuracy of τ_（LIDAR） is influenced by specific atmospheric conditions,regardless of its uncertainty.

关键词： LIDAR Sun/sky radiometer MODIS Optical/microphysical properties Aerosol optical depth

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Are human dental papilla-derived stem cell and human brain-derived neural stem cell transplantations suitable for treatment of Parkinson’s disease?

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Neural Regeneration Research 2013年第13期8卷 1190-1200页

作者： hyung Ho Yoon Joongkee Min Nari shin Yong Hwan Kim Jin-Mo Kim Yu-shik Hwang Jun-Kyo Francis Suh Onyou Hwang Sang Ryong Jeon Department of Neurological Surgery Asan Medical Center University of Ulsan College of Medicine Department of Biochemistry and Molecular Biology University of Ulsan College of Medicine Department of Computer Science and Engineering University of Notre Dame Notre Dame Center for Bionics of Korea Institute of Science and Technology Department of Maxillofacial Biomedical Engineering Institute of Oral Biology School of Dentistry Kyung Hee University

Transplantation of neural stem cells has been reported as a possible approach for replacing impaired dopaminergic neurons. In this study, we tested the efficacy of early-stage human dental papilla-derived stem cells and human brain-derived neural stem cells in rat models of 6-hydroxydopamine-induced Parkinson＇s disease. Rats received a unilateral injection of 6-hydroxydopamine into right medial forebrain bundle, followed 3 weeks later by injections of PBS, early-stage human dental papilla-derived stem cells, or human brain-derived neural stem cells into the ipsilateral striatum. All of the rats in the human dental papilla-derived stem cell group died from tumor formation at around 2 weeks following cell transplantation. Postmortem examinations revealed homogeneous malignant tumors in the striatum of the human dental papilla-derived stem cell group. Stepping tests revealed that human brain-derived neural stem cell transplantation did not improve motor dysfunction. In apomorphine-induced rotation tests, neither the human brain-derived neural stem cell group nor the control groups （PBS injection） demonstrated significant changes. Glucose metabolism in the lesioned side of striatum was reduced by human brain-derived neural stem cell transplantation. [18F]-FP-CIT PET scans in the striatum did not demonstrate a significant increase in the human brain-derived neural stem cell group. Tyrosine hydroxylase （dopaminergic neuronal marker） staining and G protein-activated inward rectifier potassium channel 2 （A9 dopaminergic neuronal marker） were positive in the lesioned side of striatum in the human brain-derived neural stem cell group. The use of early-stage human dental papilla-derived stern cells confirmed its tendency to form tumors. Human brain-derived neural stem cells could be partially differentiated into dopaminergic neurons, but they did not secrete dopamine.

关键词： neural regeneration stern cells cell transplantation glucose metabolism human brain-derivedneural stem cells human dental papilla-derived stem cells Parkinson's disease positron emissiontomography grants-supported paper neuroregeneration

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Early prediction of myocardial viability after acute myocardial infarction by two-dimensional speckle tracking imaging

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Journal of Geriatric Cardiology 2015年第5期12卷 474-481页

作者： Jong shin Woo Tae-Kyung Yu Woo-shik Kim Kwon Sam Kim Weon Kim Division of Cardiology Department of lnternal Medicine Kyung Hee University Hospital Kyung Hee University Seoul South Korea

BackgroundIdentifying 心肌的坏死和在尖锐心肌的梗塞(AMI ) 的心肌的生存能力的度的 transmural 程度临床上是重要的。这研究的目的是用二维的点缀追踪估计心肌的生存能力在有 ***2D-STI 的病人的成像( 2D-STI )与 AMI 在 30 个病人... 详细信息

BackgroundIdentifying 心肌的坏死和在尖锐心肌的梗塞(AMI ) 的心肌的生存能力的度的 transmural 程度临床上是重要的。这研究的目的是用二维的点缀追踪估计心肌的生存能力在有 ***2D-STI 的病人的成像( 2D-STI )与 AMI 在 30 个病人在主要经皮的冠的干预(一种总线标准)以后在起始的表示，三天，和六个月被执行，谁有左前面的下降冠的动脉(男孩)犯人损害。另外，有最小的 stenotic 损害的 20 个病人(<；30% 狭窄) 也在控制组在冠的 angiography 上被包括。在六月 dobutamine， echocardiography 在 LAD 领土的七个片断为生存能力评价被执行。根据墙运动反常的恢复，片断作为可行被分类或 131 个片断全部的 *** 是可行的，并且 44 是不能生存的。Multivariate 分析在山峰揭示了可行、不能生存的片断之间的重要差别收缩紧张，山峰在起始的表示的收缩紧张率，和山峰在主要一种总线标准以后的收缩紧张率三天。在这些之中，起始的山峰收缩紧张率为心肌的生存能力有最高预兆的价值(危险比率：31.22， P <；0.01 ).Conclusions2D-STI 为估计收缩紧张率可能是的心肌的生存能力，和山峰是可行的在有 AMI 的病人的心肌的生存能力的最可靠的预言者。

关键词：急性心肌梗死早期预测成像技术追踪斑点二维冠状动脉造影峰值应变

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Experimental assessment of two-phase bubble pump for solar water heating

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Journal of Central South University 2012年第6期19卷 1590-1599页

作者： CHUNG Han-shik WOO Ju-sik shin Yong-han KIM Jun-hyo JEONG Hyo-min Institute of Marine Industry Department of Mechanical and Precision EngineeringGyeongsang National University445 Inpyeong DongTongyeongGyeongsangnamdo650-160Korea Department of Mechanical and Precision Engineering Gyeongsang National University445 Inpyeong DongTongyeongGyeongsangnamdo650-160Korea Division of Marine Engineering Mokpo National Maritime UniversityHaeyangdaehang-Ro 91Mokpo-siJeollanam-do530-729Korea

The research goal is to develop a new solar water heater system(SWHS) that uses a solar bubble pump instead of an electric *** pump is powered by the steam produced from an evacuated tube ***,heat could be transferred downward from the collector to a hot water storage *** designed system consists of two sets of heat-pipe evacuated tube collectors,a solar bubble pump installed at an upper level and a water storage tank with a heat exchanger at a lower *** heads of 1 and 5 m were *** bubble pump could operate at the collector temperature of about 90-100 ℃ and vapor gage pressure of 80-90 *** is found that water circulation within the SWHS depends on the incident solar intensity and system discharge *** investigations are conducted to obtain the system thermal efficiencies from the hourly,daily and long-term performance *** thermal performance of the proposed system is compared with conventional solar water *** results show that the proposed system achieves system characteristic efficiency of 10% higher than that of the conventional systems using electric pump if taking the consumption of electric power into *** the former is a zero carbon system.

关键词：太阳能热水器气泡泵试验评价性能测试系统真空管集热器贮热水箱电力消耗电动泵

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Korea＇s Future Policy Recommendation for the Promotion of Eco-Friendly Vehicles in Metropolitan Area

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Journal of Energy and Power Engineering 2017年第6期11卷 385-392页

作者： Won shik shin Graduate School of Knowledge Based Technology and Ener~ Korea Polytechnic University 237 Sangidaehak-ro Siheung-siGyeonggi-do 15073 Korea President of Korea Association for Natural Gas Vehicles (KANGV) 2nd Floor KOGAS 340 Gonghang-daero Gangseo-gu Seoul07647 Korea

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Molecular phylogenetic status of Siberian roe deer(Capreolus pygargus) based on mitochondrial cytochrome b from Jeju Island in Korea

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Chinese Science Bulletin 2014年第32期59卷 4283-4288页

作者： Yong-Su Park Baek-Jun Kim Woo-shin Lee Jong-Taek Kim Tae-Wook Kim Hong-shik Oh Jangsu Endangered Species Restoration Team Jangsu CountyJeonbuk 176-7 Republic of Korea Department of Climate and Ecology National Institute of Ecology Seocheon 325-813 Republic of Korea Department of Forest Science Seoul National UniversitySeoul 151-192 Republic of Korea School of Veterinary Medicine Kangwon National UniversityChuncheon Gangwon 200-701 Republic of Korea Department of Science Education Jeju National UniversityJeju 690-750 Republic of Korea

In order to elucidate the genetic diversity and taxonomic status of Siberian roe deer(Capreolus pygargus)from the Korean peninsula,partial sequences of the mitochondrial cytochrome b gene were *** collected 57 roe deer samples from Mainland and Jeju Island between July 2004 and June 2009.A total of 50 sequences(1,070 bp)were obtained,and seven haplotypes were *** haplotypes were found from Mainland,and two were discovered from Jeju *** genetic diversity was lower in the Jeju Island population than in the Mainland *** addition,both the consensus neighbor-joining tree and maximum parsimony tree showed an identical topology between the Mainland and Jeju Island *** on the results,two subspecies of the Korean roe deer were *** roe deer in Jeju Island showed a distinct difference in the cytochrome b gene compared with other Siberian roe deer,being aunique native species inhabiting only Jeju Island in *** Siberian roe deer in Jeju Island can be classified at subspecies level,the new subspecies in Jeju was named Capreolus pygargus jejuensis in this *** this new subspecies,reasonable conservation and management effort is needed in the future.

关键词：线粒体细胞色素b基因济州岛系统发育地位矮鹿韩国狍遗传多样性分子

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Function-regeneration of non-porous hydrolyzed-MOF-derived materials

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Nano Research 2019年第8期12卷 1921-1930页

作者： Yo Chan Jeong Jin Weon Seo Jae Ho Kim Seunghoon Nam Min Chang shin Young shik Cho Jin Syul Byeon Chong Rae Park Seung Jae Yang Carbon Nanomaterials Design Laboratory Research Institute of Advanced Materials and Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Advanced Nanohybrids Lab. Department of Chemical Engineering Inha UniversityIncheon 22212Republic of Korea School of Advanced Materials Engineering College of Engineering Andong National University Andong Gyeongsangbuk-do 36729Republic of Korea

A facile synthetic strategy based on a water-based process is developed for the preparation of metal-organic framework (MOF)-derived materials by revisiting the hydrolyzed non-porous metal-organic frameworks (h-MOF). The poor water stability of MOF has been recognized as key limitations for its commercialization and large-scale applications because the hydrolysis resulted in the complete loss of their functionalities. However, we found that the negative effect of hydrolysis on MOF can be nullified during the heat treatment. As similar to the intact MOF, h-MOF can be used as a precursor for the preparation of MOF-derived materials from porous MOF-derived carbons (MDCs) to MDC@ZnO composites. The property of h-MOF-derived materials is almost equivalent to that of MOF-derived materials. In addition, h-MOF turned the weakness of water instability to the strength of facile water-based process for hybridization. With the demonstration of the hybrid composite between h-MDC@ZnO and reduced graphene oxide (rGO) as a prototype example, it exhibited superior electrochemical performance when evaluated as an electrode material for lithium-ion batteries.

关键词： nanomaterials metal-organic framework (MOF) porous materials MOF-derived carbon hydrolyzed MOF

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Evaluation of SWAT sub-daily runoff estimation at small agricultural watershed in Korea

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Frontiers of Environmental Science & Engineering 2013年第1期7卷 109-119页

作者： Ganga Ram Maharjan Youn shik Park Nam Won Kim Dong Seok shin Jae Wan Choi Geun Woo Hyun Ji-Hong Jeon Yong Sik Ok Kyoung Jae Lim GIS Environmental System Laboratory Department of Regional Infrastructure Engineering Kangwon National University Chuncheon 200-701 R. O. Korea Department of Agricultural and Biological Engineering Purdue University West Lafayette IN 47907 USA Water-Resource Research Department Korea Institute of Construction Technology Goyang 411-712 R. O. Korea National Institute of Environmental Research Incheon 404-708 R. 0. Korea Department of Water Research Division Gangwon Institute of Health and Environment Chuncheon 200 822 R. O. Korea Department of Environmental Engineering Andong National University Andong 760-380 R. O. Korea Department of Biological Environ-ment Kangwon National University'Chuncheon 700-711 R. O. Korea

A study was undertaken for the prediction of runoff flow from 0.8 ha field-sized agricultural watershed in South Korea using Soil and Water Assessment Tool (SWAT) sub-daily. The SWAT model with sub-daily configuration predicted flow from the watershed within the range of acceptable accuracy. The SWAT sub-daily simulations were carried out for a total of 18 rainfall events, 9 each for calibration and validation. Overall trend and extent of matching simulated flow for the rainfall events in 2007-2008 with measured data during the calibration process were coefficient of determination ( ) value of 0.88 and Nash and Sutcliffe Efficiency ( ) value of 0.88. For validation, and values were 0.9 and 0.84, respectively. Whereas and values for simulation results using daily rainfall data were 0.79 and -0.01, respectively, that were observed to be out of acceptable limits for the model simulation. The importance of higher time resolution (hourly) precipitation records for flow simulation were evaluated by comparing and with 15 min, 2 h, 6 h and 12 h precipitation data, which resulted in lower statistics with increases in time resolution of precipitation data. The SWAT sub-daily sensitivity analysis was performed with the consideration of hydraulic parameter and was found as in the rank order of CN2 (curve number), ESCO (soil evaporation compensation factor), GW_DELAY (ground water delay time), ALPHA_BF ( base flow alpha factor), GWQMN ( a threshold minimum depth of water in the shallow aquifer required for return flow to occur) , REVAPMN (minimum depth of water in shallow aquifer for re-evaporation to occur) , LAT_TIME (lateral flow travel time) respectively. These sensitive parameters were evaluated at 10% higher and lower values of the parameters, corresponding to 70.5% higher and 23.2% lower in simulated flow out from the SWAT model. From the results obtained in this study, hourly precipitation record for SWAT sub-daily with Green-Ampt infiltration method was prov

关键词： Soil and Water Assessment Tool (SWAT) sub-daily simulation runoff rainfall

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