신규 비공액성 청색발광재료 PPPMA-co-DTPM 공중합체 합성을 통한 백색유기발광소자 제작

조재영,오환술,김태구,윤석범,Cho, Jae-Young,Oh, Hwan-Sool,Kim, Tae-Gu,Yoon, Seok-Beom 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.7

To fabricate a single layer white organic light emitting diode (OLED), a novel non-conjugated blue emitting material PPPMA-co-DTPM copolymer was synthesized containing a perylene moiety unit with hole transporting and blue emitting ability and a triazine moiety unit with electron transporting ability. The devices were fabricated using PPPMA-co-DTPM $(PPPMA[70\;wt\%]:DTPM[30\;wt\%])$ copolymer by varying the doping concentrations of each red, green and blue fluorescent dye, by molecular-dispersing into Toluene solvent with spin coating method. In case of ITO/PPPMA-co-DTPM:TPB$(3\;mol\%):C6(0.04\;mol\%):NR(0.015\;mol\%)/Al$ structure, as they were molecular-dispersing into 30 mg/ml Toluene solvent, nearly-pure white light was obtained both (0.325, 0.339) in the CIE coordinates at 18 V and (0.335, 0.345) at 15 V. The turn-on voltage was 3 V, the light-emitting turn-on voltage was 4 V, and the maximum external quantum efficiency was $0.667\%$ at 24.5 V. Also, in case of using 40 mg/ml Toluene solvent, the CIE coordinate was (0.345, 0.342) at 20 V.

전기방전소결을 이용한 Ti-Ni-Zr 준 결정상의 상변화 연구와 Ti, W 다공체 제작

조재영,송기안,이민하,이효수,이원희,김기범,Cho, J.Y.,Song, G.A.,Lee, M.H.,Lee, H.S.,Lee, W.H.,Kim, K.B. 한국분말야금학회 2011 한국분말재료학회지 (KPMI) Vol.18 No.2

Electro-Discharge Sintering (EDS) employs a high-voltage/high-current-density pulse of electrical energy, discharged from a capacitor bank, to instantaneously consolidate powders. In the present study, a single pulse of 0.57-1.1 kJ/0.45 g-atomized spherical $Ti_{52}Zr_{28}Ni_{20}$ powders in size range of 10~30 and $30\sim50{\mu}m$ consisting of ${\beta}$-(Ti, Zr) and icosahedral phases were applied to examine the structural evolution of icosahedral phase during EDS. Structural investigation reveals that high electrical input energy facilitates complete decomposition of icosahedral phase into C14 laves and ${\beta}$-(Ti, Zr) phases. Moreover, critical input energy inducing decomposition of the icosahedral phase during EDS depends on the size of the powder. Porous Ti and W compacts have been fabricated by EDS using rectangular and spherical powders upon various input energy at a constant capacitance of $450{\mu}F$ in order to verify influence of powder shape on microstructure of porous compacts. Besides, generated heat (${\Delta}H$) during EDS, which is measured by an oscilloscope, is closely correlated with powder size.

${\pi}$형 거더를 가진 4경간 사장교의 동적거동에 관한 실험적 연구

조재영,김영민,이학은,윤기용,Cho, Jae-Young,Kim, Young-Min,Lee, Hak-Eun,Yoon, Ki-Yong 한국방재학회 2004 한국방재학회논문집 Vol.4 No.1

Generally, a ${\pi}$-type girder composed of two I-type girders is known to have a significant disadvantage in wind resistance design because of aerodynamic instability. A representative bridge for this girder was Tacoma Narrows Bridge. Since Tacoma Narrows Bridge had very low stiffness of the bridge structure and its cross-section shape had aerodynamic instability, the bridge collapsed after severe torsion and vibration events in 19m/s wind speed. Aerodynamic vibration can be avoided by enhancing structural stiffness and damping factor and conducting a study of cross-section shapes. This study shows the angle of attack for the four-span cable stayed bridge having ${\pi}$-type cross-section and describes the aerodynamic characteristics of the changed cross-section with aerodynamic vibration damping additions, by carrying out two-dimension vibration tests. As a result of uniform flow and turbulent flow, the study shows that because the basic ${\pi}$-type cross-section alone can have efficient wind resistant stability, there is no need to have additional aerodynamic damping equipment. Since this four 230m-main-span bridge has a large frequency and also has a big stiffness compared to other bridges containing a similar cross-section, it has aerodynamic stability under the design wind speed. 일반적으로, 2개의 I형 거더로 이루어진 ${\pi}$형거더는 공기역학적으로 불안하여 내풍설계에 있어 매우 불리 한 것으로 알려져 있다. 공기역학적 진동은 구조물의 강성이나 감쇠의 향상, 단면 형상의 연구 등에 의해 억제될 수 있으므로 본 연구에서는 ${\pi}$ 형단면을 가진 4경간 사장교에 대해 영각과 공기역학적 제진장치의 추가로 인한 단면의 변화에 따른 2차원 진동실험을 통하여 공기역학적 특성을 파악하도록 하였다. 등류와 난류에서의 실험결과 본 교량단면은 기본단면만으로도 내풍안정성을 충분히 갖추고 있기 때문에 페어링(Fairing) 및 베플(Baffle Plate) 등의 추가적인 공기역학적 제진장치가 필요하지 않을 것으로 판단된다. 이는 본 교량의 경우 주경간이 230m인 4경간으로 이루어져 있어 비슷한 단면을 가진 교량에 비하여 수직 및 비틀림 진동수가 크고 강성이 크기 때문에 설계풍속 내에서 공기역학적으로 안정한 것으로 보여진다.

태양광 폐 모듈의 처리현황 및 실용화 기술

조재영,박아름,윤현목,전연수,김준수,Cho, Jai Young,Park, Areum,Yun, Hyun Mok,Jun, Yun-Su,Kim, Joon Soo 한국자원리싸이클링학회 2020 資源 리싸이클링 Vol.29 No.4

Recently, it is increasing a amount of installed solar-cell rapidly, and end-of-life photovoltaic(ELP) modules are generated in according to the reduction of cell efficiency largely. Recycling of ELP modules are begun at an advanced nation already, but there are bring about environmental contamination and resource recovery problems owing to not treated ELP modules because of economic cost completely. First of all, there were researched basic study for treatment conditions of used solar cell inspection, dismantling of aluminum frame, crushing / grinding & separation of tempered glass, removal of back sheet & EVA film, leaching & precipitation recovery of valuable metals and treatment of waste water. Therefore, we establish optimum conditions through carried out of designed apparatus, installation of equipment, test operation & trouble shooting in scale of 1ton/day pilot plant test. Following to economic review, it does have the economic efficiency until to the case of tempered glass recovery, but does not have the economic value in case of total processes until to recover the valuable metals. However, there are guaranteed economic value if we are gained a large amount of the expenses through EPR supported system. It was confirmed the commercialized possibility of ELP modules recycling if there were established on the collecting ELP modules, reusing criteria, economical technology, enactment of directives and enforcement of EPR supported system efficiently.

P-47 Elucidation of Genetic Susceptibility of Patients with Nontuberculous Mycobacterial Lung Disease Using Genome-Wide Association Study

조재영,( Kyungtaek Park ),( Seung Ho Choi ),( Sun Mi Choi ),( Jinwoo Lee ),( Chang-hoon Lee ),( Jung-kyu Lee ),( Eun Young Heo ),( Deog Kyeom Kim ),( Yeon Joo Lee ),( Jong Sun Park ),( Young-jae Cho ),( 대한결핵 및 호흡기학회 2017 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.124 No.0

Background: The clinical features of patients with nontuberculous mycobacteria (NTM) lung disease are well described, however, genetic factors of susceptibility to NTM lung disease are not understood. To examine genetic variants in patients with NTM lung disease, we conducted a genome-wide association study (GWAS). Methods: We genotyped 408 patients with NTM lung disease using the Illumina HumanCore BeadChip, and performed an association study with existing genotyping data of 4080 healthy controls from three Korean cohorts (Korean Association REsource [KARE], Healthy Twin Study, and routine health check-up program at the Seoul National University Hospital). Results: We identified three single nucleotide polymorphisms (SNPs) located in chromosome 14q31.1. The strongest signal was obtained at the rs1797671 (P = 5.76ⅹ10-8, OR = 2.11, 95% CI =95% CI = 1.61 to 2.76) in the intron of CEP128. rs10133034 in the intron of CEP128 and intergenic rs2150330 were also associated with NTM lung disease (P = 3.88ⅹ10-7 , OR = 1.99, 95% CI = 1.52 to 2.59 and P = 1.65ⅹ10-7, OR = 2.47, 95% CI = 1.76 to 3.47, respectively). Our estimate of the proportion of variance in the phenotype explained by all GWAS SNPs was 0.30 ± 0.06. Conclusions: We identified new genetic variants associated with NTM lung disease. The replication study to validate the result is going on. These findings may provide insight into the pathogenesis of NTM lung disease and identifying susceptible individuals to this disease.

맥류 기계화 적응재배 양식과 적응품종의 생태에 관한 연구

조재영,Jae-Young Cho 한국작물학회 1970 Korean journal of crop science Vol.- No.8

맥류의 기계화적응재배로서 드릴파와 점파를 품종과 비료수준을 달리하여 실행의 보통재배 및 광파재배와 비교시험한 결과를 요약하면 다음과 같다. 1. 대맥의 최적품종은 안전 다수 조숙인 당여이고, Barsoy는 내동성이 약하였다. 2. 소맥의 최적품종은 영광으로서 안전 다수 대립이나 성숙이 늦다. 원광은 도복이 심하였다. 3. 배비는 보통비보다 다수이고 도복이 약간 조장된 이외에는 재배적위험성도 없었다. 4. 내동 내도복성품종을 취택하면 배비조건에서도 드릴파나 점파가 안전하다. 5. 보통재배에 대한 증수율은 대맥에서는 20cm간격의 드릴파 16%, 광파 13%, 20${\times}$12cm의 점파가 12%였고, 소맥에서는 광파 9%, 20 ${\times}$ 13 cm의 점파 8%, 20cm 간격의 드릴파 7%였다. 6. 이들의 증수원인으로서는 수수의 증대가 가장 뚜렷하다. 7. 파종량의 증대는 드릴파 증수의 주인으로 되지 않은 것 같다. 8. 점파나 드릴파는 성숙을 다소 조장하는 경향이 있다. 9. 점파재배는 파종작업중의 필연적인 답압에 의하여 소맥에서 발아를 조장하는 효과가 있었다. 10. 드릴파나 점파에서는 좀더 밀식함으로서 더욱 증수할 여지가 있을 것 같다. To research the seeding systems and the varieties adapted to mechanization in barley and wheat culture in Korea, the studies were carried out from October, 1969 to June, 1970 at Suwon. In these studies, six kinds of seeding systems of drilling and dibbling that seems to adapted to mechanization were tested as compared with the customary seeding system, furrowing moderately or widely, using three varieties of barley, Suwon #18, Barsoy and Buhufng, and three varieties of wheat, Wonkwang, Yucseung #3 and Yeungkwang, under the two fertilizer levels of standard and double. The summarize results gained were as follows; 1. Buhung seemed to be the most suitable variety in barley as it yielded the most and matured early and grew the safest. Barsoy suffered from winter injury. 2. Yeungkwang seemed to be the most suitable variety in wheat as it yielded the most and produced the largest grain ani grew the safest, however it matured late. Wonkwang suffered heavily from lodging injury. 3. More yield were produced and there were no increase of cultural dangers except lodging in double fertilizer level. 4. Seeding system of drilling and dibbling seems to be able to put in practice safely under the double fertilizer level when lodging resistant varieties are selected. 5. Rate of yields increase in comparison with the customary seeding system of moderate furrowing were 16 percent in drilling of 20 centimeter spacing, 13 percent in wide furrowing and 12 percent in dibbling of 20 ${\times}$ 12 centimeter spacing in barley and also 9 percent in wide furrowing, 8 percent in dibbling of 20 ${\times}$ 12 centimeter spacing and 7 percent in drilling of 20 centimeter spacing in wheat. 6. The most important cause of above yields increase seems to be the increase of spike number per unit area. 7. Yields increase by drilling as compared with furrowing was not caused by higher rate of seeding. 8. The plants matured a bit earlier by drilling and dibbling. 9. Better stands of seedling were fount in dibbling due to the promotion of germination by tramping. 10. An increase of yields will be expected by decreasing the spacing in drilling and dibbling.

강합성 단면을 가진 사장교의 와류진동 발생 예측

조재영,조영래,이학은,Cho. Jae-Young,Cho. Young-Rae,Lee. Hak-Eun 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1

After over a century of effort by researchers and engineers, the problem of bluff body flow, in particular vortex shedding frequency, remains almost entirely in the empirical, descriptive realm of knowledge. Computational methods have been systematically applied for vortex-induced vibrations of the cable-stayed bridge with steel composite deck by unsteady wind loadings due to vortex-shedding. The focus of this paper is to predict the vortex-induced vibration of the cable-stayed bridge with steel composite deck based computational fluid dynamics(CFD).

대두의 생육 및 연구에 있어서의 당면과제

조재영,Jae-Young Cho 한국작물학회 1969 Korean journal of crop science Vol.- No.6

각종재배조건이 고구마 수량 및 전분 함량에 미치는 영향

조재영,박근용,반채돈,Jae-Young Cho,Keun-Yong Park,Chae-Don Ban 한국작물학회 1970 한국작물학회지 Vol.- No.8

각종 재배조건 및 저장기간이 고구마 전분함량에 미치는 영향을 구명코저 신미 품종을 공시하여 삽식기별 수수기별 시비량별 토성별 저장기간별로 구분 시험을 실시하였든바 요약하면 다음과 같다. 1. 5월 15일 삽식에 비하여 만식일수록 괴근수량 및 전분함랴은 감소되었고 특히 6월 5일 이후의 삽식에서 급격히 감소되었으며 괴근수량의 감소정도에 비하여 전분함량의 감소정도는 더욱 심하였다. 2. 10월 5일 적기수확에 비하여 조기수확일수록 괴근수량 및 전분함량은 감소 경향이였고 8월 25일 이전 조기수확은 괴근수량 37~45% 전분함량 5~7%의 감소를 보였다. 3. 시비량에 따라서 전분함량은 차이가 많았으며 대체로 3요소를 균형시비하는 경우 전분함량이 높은 경향이었고 가리질비료를 다용하거나 인산질비료를 시용하지 않은 경우 낮은 경향이였다. 한편 괴근수량에는 $K_20$O>$P_20_5$>N의 순으로 효과가 높았다. 4. 토성에 있어서는 모래나 자갈이 많이 함유되어 있는 토양에서부터 경직토로 갈수록 전분함량은 낮았으나 10a당 전분수량은 조사토 및 식양토에서 높았다. 5. 저장기간중 전분함량은 수량직후에 가장 높고 저장일수가 경과함에 따라 감소하였으나 수확후 10일에서 급격히 감소되었고 그 후의 감소는 근소하였다. Investigation was made to know the effects of the time of transplanting and harvesting, fertilizer, soil texture and period of storage on tuber yield and starch content of sweet potato. Variety used was Shin-mi, one or the leading varieties in Korea. Late transplanting, early harvesting, and balanced application of nitrogen, phosphorous and potassium, and loam and coarse sandy loam were more effective in increasing starch content than early planting, late harvesting, and more application of potassium and none application of phosphorous, and light clay respectively. Long storage period resulted in reducing starch content.

질소의 추비기 및 추비방법이 소맥의 수량 및 수량요인에 미치는 영향

조재영,이동우,조장환,홍병희,Jae-Young Cho,Dong-Woo Lee,Chang-Hwan Cho,Byong-Hee Hong 한국작물학회 1969 한국작물학회지 Vol.- No.7

다수확 비료체계의 확립을 위하여 추비기 및 추비바업이 소맥의 수량요인에 미치는 영향에 관하여 시험한 결과를 요약하면 다음과 같다. 1. 배비구는 보비구에 비하여 수수 1수립수 및 수량이 높았으나 통계적 유의차는 보이지 않았다. 이는 저온 건조한 기상조건으로 말미암아 비료의 흡수 소화가 원활하지 못하였기 때문일 것이다. 2. 질소추비량의 1/3을 출수기에 토양시비 한 것은 6~7% 감소되었다. 3. 질소추비량의 1/3을 출수기에 요소엽면산포한 것은 4~6% 증수하였으며 1수립수와 천립중이 증대되었다. 4. 추비시기는 3월중하순이 가장 증수되었다. 유효경비율과 수중이 훨씬 크고 간장, 수장, 수수, 1수립수 및 천립중도 약간 컸다. A study has been made on the time of nitrogen top-dressing and the method of top-dressing to establish the higher yielding cultural method for wheat at Suwon. In this experiment, it was observed that the application of nitrogen top-dressing with urea leaf spray as spike fertilizer increased the yield by 4~6 percent over nitrogen top-dressing of equal quantity only. Considering the yield and various factors concerned, it is reasonable to apply top-dressing on mid and late of March in Suwon area.