http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Cho, Seongeun,Kim, Youngjun,Park, Yujin,Choi, Miri,Park, Jun-young,Lee, Jihoon,Park, Sungyoung,Chang, Mincheol,Cho, Jiung,In, Insik,Park, Byoungnam American Chemical Society 2016 The Journal of Physical Chemistry Part C Vol.120 No.45
<P>A comprehensive understanding of the effect of polymer chain aggregation-induced molecular ordering and the resulting formation of lower excited energy structures in a conjugated polymer on exciton dissociation and recombination at the interface with a wide-bandgap semiconductor is provided through correlation between structural arrangement of the polymer chains and the consequent electrical and optoelectronic properties. A vertical diode-type photovoltaic test probe is combined with a field effect current modulating device and various spectroscopic techniques to isolate the interfacial properties from the bulk properties. Enhanced energy migration in the quasi-ordered (poly(3-hexylthiophene)) (P3HT) film, processed through vibration-induced aggregation of polymer chains in solution state, is attributed to the presence of the aggregation induced interchain species in which excitons are allowed to migrate through low barrier energy sites, enabling efficient iso-energetic charge transfer followed by the downhill energy transfer. We discovered that formation of nonemissive excitons that reduces the photoluminescence quantum yield in the P3HT film deactivates exciton dissociation at the donor (P3HT) close to the acceptor (ZnO) as well as in the P3HT far away from the ZnO. In other words, exciton deactivation in its film state arising from the quasi-ordered structural arrangement of polymer chains in solution is retained at the donor/acceptor interface as well as in the bulk P3HT. Effect of change in the highest occupied molecular orbital level and the resulting energy band bending at the P3HT/ZnO interface on exciton dissociation is also discussed in relation to the presence of vibration-induced aggregates in the P3HT film.</P>
A Study on Military Makeup Design With Camouflage Characteristics during CRISIS
Seongeun Park,Jungsoon Choi J-INSTITUTE 2021 International Journal of Crisis & Safety Vol.6 No.2
Purpose: Since the beginning of times, humans have had to deal with food, clothing, and shelter. As they evolved and progressed, they did not have any medium of protection when dangers emerged from the environment, like animals. The origins of the army, was as a group of humans who had to protect themselves. Camouflage started when humans had to protect themselves from other humans, rather than animals or external factors, so they needed an additional protection apart from weapons. Method: This study concluded that military camouflage pattern characteristics were concealment, display, and distortion, respectively. Based on these features, camouflage makeup patterns were conceived. Concealment is hiding in order to permeate terrain in a war; showiness is a means of showing one’s rank or situation by means of a military uniform; and distortion is similar showing a distorted appearance by concealing it. Results: Based on Camouflage Art, which shows us as if we re one in our surroundings.Using the camouflage characteristics of the military look, three works were made with makeup, symbolic colors were added to make each characteristic visible, and objects were used to express them. Conclusion: This work is a research on makeup patterns that use protective media such as camouflage in crisis. It is believed that this study can have a good influence not only in the industrial application of beauty but also in the military and fashion circles.
산업부산물(플라이애시)과 실리카퓸을 재활용한 숏크리트의 환경유해성 평가
박철우(Park Cheolwoo),심종성(Sim Jongsung),강태성(Kang Taesung),박성은(Park Seongeun) 대한토목학회 2010 대한토목학회논문집 C Vol.30 No.3
최근 산업발전에 따른 천연자원 고갈, 공해물질 배출, 폐기물 발생 등과 같은 부가적인 문제는 세계적으로 이슈화되고 있다. 현재 국내 산업부산물은 연간 600만 톤이 발생하며, 매립, 소각, 저장과 같은 1차원적인 처리에도 한계가 발생하고 있는 실정이다. 본 연구에서는 산업폐기물인 플라이애시 재활용 연구의 일환으로 플라이애시와 실리카퓸을 숏크리트에 활용하여 자원의 재활용 문제뿐만 아니라 숏크리트에 적용함으로써 플라이애시의 사용을 확대하고자 한다. 그러나 숏크리트에 적용하기에 앞서 최근 범지구적으로 이슈화되고 있는 환경문제에 보다 적극적으로 대처하기 위하여 환경유해성 평가가 반드시 필요하며, 본 연구에서는 예비 배합 및 압축강도 시험을 통해 도출한 10가지 배합에 대하여 화학성분 분석시험과 중금속 용출시험을 통해 환경 영향평가를 실시하였다. 압축강도 시험결과, 모든 배합에서 국내외 기준을 만족하는 것으로 나타났으며, 중금속 용출시험의 경우 Cr, Cd, Hg 성분은 검출되지 않고 Pb 성분은 플라이애시가 함유된 일부분의 경우에서만 검출되었다. 그리고 Cu, As 성분이 모든 배합에서 검출되었으나 국내외 기준에 모두 만족하는 결과를 얻을 수 있었다. The problems such as natural resource exhaustion, pollutant emission and waste generation are increasing worldwide with the industrial development. The quantity of the industrial by-product in Korea is 6 million tons a year, and even its basic treatment processes including landfill, incineration and storage have reached their limits. In this study, fly ash and silica fume were applied to shotcrete to develop a method for the reuse of resources and to increase the use of fly ash, which is an industrial waste. An environmental hazard evaluation is a must to actively address the worldwide environmental problems, though. Therefore, an environmental impact assessment was conducted using the chemical content analysis test and heavy metal exudation test, for ten mixtures that were obtained through the pre-mixing and compressive strength tests. The results of the compressive strength test showed that all mixtures satisfied national and international standards. Cr, Cd and Hg were not detected, and Pb was detected only in some cases with fly ash. Cu and As were detected in all mixtures, but all of them satisfied national and international standards.
Cho, Seongeun,Kim, Youngjun,Kim, Minkyoing,Kim, Jin-A.,Kim, Kihyun,Park, Yujin,Han, Soojin,Han, Chang-Yeol,Kim, Jong-Hoon,Hwang, Jun Yeon,Park, Jun-Young,Kim, Eugene,Yang, Heesun,Park, Byoungnam Elsevier 2017 Solar energy materials and solar cells Vol.164 No.-
<P><B>Abstract</B></P> <P>We demonstrate that, through formation of Zn<SUB>1−x</SUB>Mg<SUB>x</SUB>O nanocrystal solid solution (NCSS) coupled with lead sulfide (PbS) nanocrystal (NC) of different size, optoelectronic properties of a donor-acceptor energy harvesting assembly can be probed and tuned. In the ITO/PEDOT:PSS/PbS/Zn<SUB>1−x</SUB>Mg<SUB>x</SUB>O/Al arrangement as a photovoltaic test probe, simultaneous tuning of Zn<SUB>1−x</SUB>Mg<SUB>x</SUB>O NC solid solution (NCSS) and PbS NC in a narrow range in the energy levels is achieved altering the open circuit voltage and the short circuit current as measures of donor/acceptor interfacial electronic properties. With the Mg composition increasing, the energy band gap of the Zn<SUB>1−x</SUB>Mg<SUB>x</SUB>O NCSS (acceptor) increases with its conduction band edge becoming closer to the lowest occupied molecular orbital level of the PbS NC (donor), increasing splitting of quasi-Fermi energy levels in the electron donor/acceptor assembly under illumination. More amount of Mg in the NCSS leads to transition from an energy level limited regime to a trap-induced charge transport limited regime, evidenced by a simultaneous decrease in the open circuit voltage and the short circuit current. This new finding provides insights of trade-off between the energy level off-set and the trap-induced charge transport degradation in engineering interfacial charge transfer and transport via formation of NCSS in integrating modern electronic devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Simultaneous tuning of Zn<SUB>1−x</SUB>Mg<SUB>x</SUB>O NCSS and PbS NC in a narrow range is achieved. </LI> <LI> Formation of NCSS at a very narrow range has a dramatic effect on the interfacial properties. </LI> <LI> Subtle amount of doping in the NCSS leads to transition from an energy level limited to a transport limited regime. </LI> </UL> </P>