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여름철 도시근린공원의 기온저감 효과 - 경기도 수원시 효원공원 -
박수국 ( Sookuk Park ),조상만 ( Sangman Jo ),현철지 ( Cheolji Hyun ),공학양 ( Hak-yang Kong ),김승현 ( Seunghyun Kim ),신영규 ( Youngkyu Shin ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.9
In order to investigate the effect of air temperature reduction on an urban neighborhood park, air temperature data from five inside locations (forest, pine tree, lawn, brick and pergola) depending on surface types and three outside locations (Suwon, Maetan and Kwonsun) depending on urban forms were collected during the summer 2016 and compared. The forest location had the lowest mean air temperature amongst all locations sampled, though the mean difference between this and the other four locations in the park was relatively small (0.2-0.5℃). In the daytime, the greatest mean difference between the forest location and the two locations exposed to direct beam solar radiation (brick and lawn) was 0.5-0.8℃ (Max. 1.6-2.1℃). In the nighttime, the mean difference between the forest location and the other four locations in the park was small, though differences between the forest location and locations with grass cover (pine tree and lawn) reached a maximum of 0.9-1.7℃. Comparing air temperature between sunny and shaded locations, the shaded locations showed a maximum of 1.5℃ lower temperature in the daytime and 0.7℃ higher in the nighttime. Comparing the air temperature of the forest location with those of the residential (Kwonsun) and apartment (Maetan) locations, the mean air temperature difference was 0.8-1.0℃, higher than those measured between the forest location and the other park locations. The temperatures measured in the forest location were mean 0.9-1.3℃ (Max. 2.0-3.9℃) lower in the daytime than for the residential and apartment locations and mean 0.4-1.0℃ (Max. 1.3-3.1℃) lower in the nighttime. During the hottest period of each month, the difference was greater than the mean monthly differences, with temperatures in the residential and apartment locations mean 1.0-1.6℃ higher than those measured in the forest location. The effect of air temperature reduction on sampling locations within the park and a relatively high thermal environment on the urban sampling locations was clearly evident in the daytime, and the shading effect of trees in the forest location must be most effective. In the nighttime, areas with a high sky view factor and surface types with high evapotranspiration potential (e.g. grass) showed the maximum air temperature reduction. In the urban areas outside the park, the low-rise building area, with a high sky view factor, showed high air temperature due to the effect of solar (shortwave) radiation during the daytime, while in the nighttime the area with high-rise buildings, and hence a low sky view factor, showed high air temperature due to the effect of terrestrial (longwave) radiation emitted by surrounding high-rise building surfaces. The effect of air temperature reduction on the park with a high thermal environment in the city was clearly evident in the daytime, and the shading effect of trees in the forest location must be most effective. In the nighttime, areas with high sky view factor and surface types (e.g., grass) with evapotranspiration effect showed maximum air temperature reduction. In the urban areas outside the park, the high sky view factor area (low-rise building area) showed high air temperature due to the effect of solar (shortwave) radiation during the daytime, but in the nighttime the low sky view factor area (high-rise building area) showed high air temperature due to the effect of terrestrial (longwave) radiation emitted surrounding high-rise building surfaces.
Park, Sangman,Nam, So Yeon,Suh, Dong Hack,Lee, Jaemin,Lee, Changjin,Yoon, Sung Cheol American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.3
<P>Organic photovoltaic Cells (OPVs) have been considered to be a next-generation energy source to overcome exhaustion of resources. Currently, OPVs are developed based on two types of donor material with polymer and small molecule. Polymeric donor materials have shown better power conversion efficiency (PCE) than small molecular donor materials, since it's easy to control the morphology of photoactive film. However, the difficulty in synthetic reproducibility and purification of polymeric donor were main drawback to overcome. And then, recently small molecule donor materials have been overcome bad morphology of OPVs film by using appropriate alkyl substituents and relatively long conjugation system. In this study, we designed and synthesized D-A-D-A-D type small molecular donor materials containing alternatively linked benzodithiophene (BDT) and diketopyrrolopyrrole (DPP) units. Also, we studied on the effect of photovoltaic performance of prepared small molecular D-A-D-A-D type donor with variation of thiophene links and with/without hexyl substituent. Our small molecular donors showed HOMO energy levels from -5.26 to -5.34 eV and optical bandgaps from 1.70 to 1.87 eV by CV (cyclic voltammetry) and UV/Vis spectroscopy, respectively. Finally, 3.4% of PCE can be obtained using a mixture of BDT(DPP) 2-T2 and PCBM as an active layer with a Voc of 0.78 V, a Jsc of 9.72 mA/cm(2), and a fill factor of 0.44 under 100 mW/cm2 AM 1.5G simulated light. We will discuss the performance of D-A-D-A-D type small molecular donor based OPVs with variation of both terminal substituents.</P>
『캐스터브리지 시장』에 나타난 핸차드의 실패한 가부장적 언술행위
박상만 ( Park Sangman ) 대한영어영문학회 2013 영어영문학연구 Vol.39 No.2
This paper aims to study the patriarchical speech acts presented with The Mayor of Casterbridge written by Thomas Hardy. The features of this work is focused that speech acts of main characters are being performed in the agricultural community, Casterbridge. This story is classfied into 'novels of Character and Environment' which is centered on a story of character and fortune of a man. Through the 'words' and 'letters' of the hero Henchard, we can see his character and life correctly. I will study how Henchard's patriarchical speech acts affect the surrounding characters―Susan, Farfrae, Lucetta, Elizabeth Jane and Newson in this novel. Character can signify 'sign' or 'letter' Henchard would present. What seems most significant is the way that words and letters becomes Henchard's enemy. The speech acts which reveal the emotion and volition of a man finally destroy him. From the beginning to the end of this novel, Henchard is doomed to be bound by his words. He is always at the mercy of his own words and when he tries to use others' words against them, he always falters, unable to commit such violent acts. Thus, Henchard's Speech acts knock over him and his family, and in the end make him a victim of his community. (WonKwang University)