롤투롤 스퍼터 시스템을 이용하여 PET 기판위에 성막 시킨 ITO 박막의 특성 연구

조성우,최광혁,배정혁,문종민,정진아,정순욱,박노진,김한기,Cho, Sung-Woo,Choi, Kwang-Hyuk,Bae, Jung-Hyeok,Moon, Jong-Min,Jeong, Jin-A,Jeong, Soon-Wook,Park, No-Jin,Kim, Han-Ki 한국재료학회 2008 한국재료학회지 Vol.18 No.1

The electrical, optical, structural and surface properties of an indium tin oxide (ITO) film grown on a flexible PET substrate using a specially designed roll-to-roll (R2R) sputtering system as a function of the DC power, $Ar/O_2$ flow ratio, and rolling speed is reported. It was observed that both the electrical and optical properties of the ITO film on the PET substrate were critically dependent on the $Ar/O_2$ flow ratio. In addition, x-ray diffraction examination results showed that the structure of the ITO film on the PET substrate was an amorphous structure regardless of the DC power and the $Ar/O_2$ flow ratio due to a low substrate temperature, which was maintained constant by a main cooling drum. Under optimized conditions, ITO film with resistivity of $6.44{\times}10^{-4}{\Omega}-cm$ and transparency of 86% were obtained, even when prepared at room temperature. Furthermore, bending test results exhibited that R2R-grown ITO film had good flexibility which would be applicable to flexible displays and solar cells.

현장 추정식의 제안 및 적용을 통한 효율적인 터널 유지관리

조성우,배석중 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9

This study is to propose a more effective tunnel safety diagnosis and maintenance method through suggestion and application of field prediction equation about compression strength and carbonation. For this study the Seoul Metro was selected as a model, which has been used more than 25 years and accumulated many diagnosis data for about fifteen years. This study proposes an equation which has more than 80% of accuracy about compression strength and carbonation depth, and it proves the accuracy of this equation about measured values by comparing and analyzing with the existing prediction equations. We have made out the map of compression strength and carbonation by applying the prediction equation. Since engineer and structure manager can easily detect weak spots and areas of compression strength and carbonation when this durability maps are used, it is expected to make it possible for engineer and structure manager to diagnose and maintain tunnels more effectively.

밀 유전 배경에서 호밀 B 염색체가 감수분열 염색체 접합에 미치는 영향

조성우,Cho, Seong-Woo 한국자원식물학회 2022 한국자원식물학회지 Vol.35 No.5

The effect of rye B chromosome (rye B) on chromosome association was investigated in meiosis of wheat addition line. The wheat addition line was with one Leymus mollis chromosome and one L. racemosus chromosome which are under homoeologous relationship. Chromosome behavior of the two Leymus chromosomes in wheat genetic background was revealed by genomic in situ hybridization. In the first metaphase, most of the two Leymus chromosomes showed univalent in the wheat addition line without rye B (98.1 ± 0.5%). On the other hand, the wheat addition line with rye B showed higher frequency of bivalent (10.3 ± 0.2%) than wheat addition line without rye B (1.9 ± 0.5%). The wheat addition line without rye B showed abnormal bivalents with abnormal structure while the wheat addition line with rye B showed normal bivalent in low frequency. By rye B, some bivalent was composed of wheat and L. racemosus, and some trivalent was composed of wheat bivalents with L. mollis chromosome. Also, some wheat bivalents showed hyper-crossover, so those wheat bivalents showed abnormal structure compared to other wheat bivalents with normal structure such as ring, rod, and pan.

단순 연소법으로 합성한 LiNi_0.5Mn_0.3Co_0.2O₂ 양극 활물질의 구조 분석 및 전기화학적 특성 연구

조성우,주정훈,류성현,류광선,Cho, Sung-Woo,Ju, Jeong-Hun,Ryu, Seong-Hyeon,Ryu, Kawng-Sun 한국전기화학회 2010 한국전기화학회지 Vol.13 No.4

$LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$의 리튬이온 이차전지 양극 물질로의 특성을 연구하기 위해서 단순 연소합성법을 이용하여 합성했다. 합성된 물질의 구조적 특징을 분석하기 위하여 X-선 회절분석(XRD)과 주사전자현미경 (FE-SEM)을 측정하였다. X-선 회절분석을 통하여 합성된 $LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$시료가 육방정계 층상구조가 형성된 것을 확인하였다. FE-SEM을 통해 측정한 결과 $LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$ 입자는 일정한 형태를 가지지 않았으며 크기는 대략 100~300 nm의 크기임을 확인할 수 있었다. 그리고 전기화학적 특성을 측정하기 위하여 충 방전 용량 측정과 CV(Cyclic Voltammetry)를 측정하였다. 2.8 V에서 4.3 V까지 충 방전 용량을 측정한 결과 ~162 mAh/g의 초기 방전 용량을 가졌다. $LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$ active material was prepared by simple-combustion method and investigated as the cathode material for li-ion battery. The structural characterization was analyzed by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM), respectively. The XRD patterns of $LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$ sample was indicated a phase of layered hexagonal structure. The size of particles has not uniform diameters ranging from 100 to 300 nm. The electrochemical performance of the $LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$ was measured by Cyclic Voltammetry and galvanostatics. The $LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$ shows the discharge capacity of ~162 mAh/g in the range of 2.8 to 4.3 V at the first cycle.

TiO₂/Cu_xO (1<x<2)의 광촉매 활성 및 항균작용

조성우,이용임,김이한,정동운,Cho, Sungwoo,Lee, Yong-Im,Kim, Lee-Han,Jung, Dongwoon 대한화학회 2013 대한화학회지 Vol.57 No.4

$CuCl_2$로부터 용액합성법에 의해 CuO를 제조하였다. $CuCl_2$를 용액에 첨가하기 전에 용액내에 anatase형 $TiO_2$ 입자를 분산시켜 CuO가 형성되는 과정에서 $TiO_2$/CuO 결합입자를 합성하였다. 얻어진 $TiO_2$/CuO에 적당량의 글루코스를 가하여 반응시켜 CuO의 일부를 $Cu_2O$로 환원시켰다. 얻어진 시료 $TiO_2/Cu_xO$ (1<x<2) 복합체의 광특성, 광촉매 활성 및 항균작용에 대하여 실험하였다. 얻어진 $TiO_2/Cu_xO$ 복합체는 anatase와는 다르게 가시광선 전 영역에서 흡광이 발생했으며 당연한 결과로 태양광선에서 $TiO_2/Cu_xO$ 복합체의 광촉매 활성은 anatase $TiO_2$에 비하여 매우 뛰어난 것으로 나타났다. 또한 $TiO_2/Cu_xO$ 복합체의 항균성이 대단히 뛰어난 것으로 나타났다. Copper oxide (CuO) was synthesized from $CuCl_2$ by solution method. Anatase $TiO_2$ particle was dispersed into the solution before preparing CuO, so that $TiO_2$/CuO heterojunction was created through the nucleation of CuO onto the $TiO_2$ surface. Some amount of CuO was reduced to $Cu_2O$ by treating glucose into the solution, thereby preparing $TiO_2/Cu_xO$ complex. The obtained $TiO_2/Cu_xO$ complex showed advanced phtocatalytic activity under the sun light compared with the P-25 sample. In addition, the the $TiO_2/Cu_xO$ complex showed excellent antipathogenic effect.

Effects of Human Platelet Transforming Growth Factor-$\beta$ on Replication and Collagen Synthesis in Primarily Cultured Mesangial Cell

조성우,박수길,김금이,이희봉,이재담,Cho, Sung-Woo,Park, Su-Kil,Kim, Geum-Yi,Lee, Hee-Bong,Lee, Jae-Dam 생화학분자생물학회 1992 한국생화학회지 Vol.25 No.3

쥐의 mesangial 세포를 초회 배양하여 Transforming Growth Factor-$\beta$(TGF-$\beta$)가 세포의 복제 및 collagen 합성에 미치는 영향을 조사하였다. TGF-$\beta$는 사람 혈소판에서 산성 에탄올 침전법 및 FPLC를 이용한 젤 크로마토그래피의 방법으로 정제되었다. TGF-$\beta$가 mesangial 세포를 복제 및 collagen 합성에 미치는 영향은 TGF-$\beta$ 농도와 세포의 밀도에 따라 달라졌다. Confluent 세포의 경우 0.1~15 ng/ml의 농도에서 TGF-$\beta$는 mesangial 세포의 복제를 35%까지 감소시켰다. Collagen 합성은 0.5 ng/ml의 TGF-$\beta$ 농도에서는 2배로 증가되었으나 그 이상의 농도에서는 감소하기 시작하는 두 가지의 조절 양상을 보였다. 그러나 subconfluent 세포의 경우에는 세포의 복제 빛 collagen 합성 모두에 TGF-$\beta$는 아무런 효과를 나타내지 못하였다. 본 연구결과는 TGF-$\beta$가 glomerulosclerosis에 있어서 중요한 역할을 하리라는 가능성을 제시해주고 있다. The effect of TGF-$\beta$ on cell replication and collagen synthesis in primarily cultured mesangial cells from rats was studied in vitro. The TGF-$\beta$ was purified from human platelets by acidic ethanol extraction and gel filtration with FPLC. The effect of TGF-$\beta$ on the DNA synthesis and the collagen synthesis in mesangial cells depended on both TGF-$\beta$ concentration and cell density in monolayer culture. Concentrations of TGF-$\beta$ ranging from 0.1~15 ng/ml were evaluated for their effects upon DNA synthesis. In confluent cells, when compared to the growth rate in standard medium, TGF-$\beta$ concentrations in the range 0.1~15 ng/ml reduced a cell proliferation up to 35%, suggesting inhibition of cell division. The effect of TGF-$\beta$ on collagen synthesis in mesangial cells was biphasic. In confluent cells, the addition of TGF-$\beta$ induced a 2-fold increase in the production of collagen when compared with cells grown in standard medium. The maximal effect of TGF-$\beta$ occurred at 0.5 ng/ml. At higher concentrations there was a decrease in the action of TGF-$\beta$ with the effects on collagen production. In subconfluent cells, however, TGF-$\beta$ showed no significant effects on the DNA synthesis and the collagen synthesis at all concentrations. These results support that TGF-$\beta$ may play an important role as a multifunctional regulator in the pathogenesis of glomerulosclerosis.

척추 측만증의 보존적 치료에 관한 최신 지견 - PubMed 검색을 위주로 2008년 이후 -

조성우,이승연,Cho, Sung Woo,Lee, Seung Yeon 대한한방소아과학회 2013 대한한방소아과학회지 Vol.27 No.1

Objectives Scoliosis is that spine's arrangement was changed to be curved. Mostly scoliosis was found at childhood and recently rate of scoliosis is increasing. Causes of scoliosis were very various, but the patients are due to idiopathic reasons. Scoliosis was treated by conservative treatment or surgery treatment. If scoliosis is diagnosed early enough, it can be treated with conservative treatment. Methods We are searching PubMed by keywords and found 47 theses complied with requirements. Results Studies of conservative treatment of Scoliosis were active. Conservative treatments are considered before surgery treatment and there was a set guideline of conservative treatment. Also, there were several studies about effectiveness of conservative treatment and quality of life, mental stress. Studies about various kinds of conservative treatment were found as well. There were brief studies about introduction of new brace, effectiveness of several braces, and case studies. Conclusions Conservative treatment is very effective choice before surgery treatment at Scoliosis patient.

PubMed를 통한 소아질환에 대한 추나 치료 연구의 최신 동향

조성우,Cho, Sung-Woo 대한한방소아과학회 2010 대한한방소아과학회지 Vol.24 No.2

Objectives We aimed reviewing studies related to the treatment of children by Chiropractic treatment. Methods We referred to PubMed by using searching keywords of chiropractic and the terms of pediatrics, such as child, children, juvenile, pediatric, infant. Twenty four papers were found. Results 1. We found twenty four papers about pediatric and chiropractic. 2. Chiropractic was used in various pediatric diseases and was shown to be effective. 3. There were several views on safety and effectiveness of pediatric chiropractic. Conclusions Applying of pediatric chiropractic was broad, and it was effectively cure for pediatric diseases.

Diglycidyl ether of bisphenol A-Methylene dianiline-Succinonitrile계의 역학적 성질

조성우,심미자,김상욱,Cho, Sung-Woo,Shim, Mi-Ja,Kim, Sang-Wook 한국재료학회 1992 한국재료학회지 Vol.2 No.3

Succinonitrile을 첨가한 새로운 에폭시 수지, diglycidyl ether of bisphenol A(DGEBA)/4, 4'-methylene dianiline(MDA)/succinonitrile(SN)계의 역학적 성질을 충격 저항실험과 응력 변형실험을 통하여 곁화반응 특성과 반응기구를 근거로 하여 고찰하였다. DGEBA/MDA계에 각각 다른 succinonitrile의 함량을 포함하는 계를 $80^{\circ}C$에서 1.5시간 동안 경화시킨 후 완전히 경화를 이루기 위하여 $150^{\circ}C$에서 1시간 동안 경화시킨 후 시험한 결과 Succinonitrile의 함량이 증가함에 따라 본 계의 충격강도는 점차적으로 증가하였으나 인장강도는 감소하였다. 그리고 Young률은 거의 일정하게 나타났으며, 신도는 succinonitrile의 함량이 10phr에서 최대값을 보였다. 본 실험으고부터 얻은 결과는 succinonitrile이 첨가됨으로써 주 사슬간의 결합길이가 연장되었기 때문임을 알았고, 적당량의 succinonitrile을 첨가함으로 에폭시 수지의 유연성이 개선됨을 알 수 있었다. The new epoxy resin, diglycidyl ether of bisphenol A(DGEBA)/4, 4'-methylene dianiline (MDA)/succinonitrile system, containing the reactive additive succionitrile was investigated through the impact test and the stress-strain test on the basis of the behavior of cure reaction and the cure mechanism. The new epoxy resin system, having the different succinonitrile contents, were cured at $80^{\circ}C$for 1.5 hour and then in order to cure completely at $150^{\circ}C$ for 1 hour. It was shown that as the succinonitrile content increased, impact strength was gradually increased, tensile strength was decreased, almost constantly Young's modulus was sustained and elongation was increased until the succinonitrile content was increased to 10phr, and then decreased. From the experimental results, it can be concluded that the chemical bonding length between the main chains was extended by adding the reactive additive succinonitrile. It was also found that the flexibility of epoxy resin was improved by adding the succinonitrile.

공동주택에서 마스터룸(Master room) 평면 유형별 수요자 의식 조사 연구

조성우,이수용,문출성,오세규,Cho, Sung-Woo,Lee, Su-Yong,Moon, Cul-Seong,Oh, Se-Gyu 한국주거학회 2008 한국주거학회 논문집 Vol.19 No.6

The residential environment is a place which reflects the gradual evolution of human consciousness because it is a cultural space the term, 'houses' is not relevant in this context as it literally means 'contains'. The long history of human living habits cannot be 'contained' within a space, but can be 'expressed' by a space and by the way the space is used. Furthermore, due to the way it is typically constructed, the basic characteristics of the house usually cannot be rapidly changed to accommodate new habits. However, recent changes that have taken place to the characteristics of the traditional master room suggest that traditional societal values associated with patriarchy have diminished. The current trend where priority is given to children's education also affects such a change. Existing researches related to the master room is confined to the behavioral use of the space and the composition of the physical space, while research on the master room its plane type has not been carried out. Therefore, in this study, apartment model houses are selected, and are classified according to the types of master room. An analysis is then carried out of the master room based on the occupants' requirements in terms of consciousness. Any planning modifications where required are then suggested. This research comprises the followings stages. First, an examination is carried out of existing research on the master room in order to understand its background and spatial components. A definitiones of related terms is also provided. Second, an analysis is carried out of the model houses exhibited at Suwan District, examining the typical standard that has been selected for the master room. Third, an analysis is conducted of the topics and questions to be selected for a questionnaire. Fourth, an analysis is carried out of the consciousness, satisfaction and requirements of the residents, as respondents in the questionnaire, related to the master room. and Research is then conducted of the architectural methods for planning the master room. Finally, future countermeasures for planning the master room are described based on the above analysis and research findings.