BCP의 증착 조건에 따른 광학적 특성 및 전도 기구에 미치는 영향

김원종,홍진웅,Kim, Weon-Jong,Hong, Jin-Woong 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.11

In a triple-layered structure of ITO/N,N'-diph enyl-N,N'bis(3-methylphenyl)-1,1' - biphenyl-4,4'-diamine(TPD)/tris(8-hydroxyquinoline)aluminum($Alq_3$)/(2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline(BCP)/Al device, we have studied the electrical and optical characteristics of organic light-emitting diodes(OLEDs) depending on the deposition condition of BCP layer. Several different sizes of holes on boat and several different deposition rates were employed in evaporating the organic materials. And then, electrical properties of the organic light-emitting diodes were measured and the performance of the devices was analyzed. It was found that the hole-size of crucible boat and the evaporation rate affect on the surface roughness of BCP layer as well as the performance of the device. When the hole-size of crucible boat and the deposition rate of BCP are 1.2 mm and $1.0\;{\AA}/s$, respectively, average surface roughness of BCP layer is lower and the efficiency of the device is higher than the ones made with other conditions. From the analysis of current density-luminance-voltage characteristics of a triple layered device, we divided the conductive mechanism by four region according to applied voltage. So we have obtained a coefficient of ${\beta}_{ST}$ in schottky region is $3.85{\times}10^{-24}$, a coefficient of ${\beta}_{PF}$ in Poole-Frenkel region is $7.35{\times}10^{-24}$, and a potential barrier of ${\phi}_{FN}$ in Fower-Nordheim region is 0.39 eV.

유전실험법에 의한 가교폴리에틸렌의 절연특성 평가

김원종,임윤희,심낙순,심재선,방영근 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.1

In this paper, we estimated the insulation properties of cross-linked polyethylene (XLPE) for ultra-high voltage cable. we have studied the dielectric characteristics of XLPE due to frequency and temperature variation. The dielectric characteristics were measured in the temperature range from 25[℃] to l20[℃]. Also we measured in the voltage range of l[V] to 20[V] according to the step voltage application method. From FT-IR spectrum as an analysis of physical properties, a strong absorption in wavenumbers 700 to 730[cm^(-1)] 1456[cm^(-1)] and 2700 to 3000 [cm^(-1)] observed by the methyl group(CH₂). From the analysis of DSC. the crystalline melting points of the specimen observed in the temperature 60[℃] and 106.58[℃].

Strategic Management for a Labor Dispatching Industry : Focused on SWOT Analysis, IE-Matrix and SPACE Matrix

김원종,정기한 한국인터넷전자상거래학회 2016 인터넷전자상거래연구 Vol.16 No.2

South Korea has seven major shipbuilders out of world top ten global shipbuilders. The Major shipbuilding companies are Samsung, Hanjin, Hyundai, Daewoo, and STX. MTC International, Inc. is a provider of workforce solutions and services. It offers a range of services of recruiting, evaluation, training and development, labors management, and workforce consulting, to the companies mentioned above. Most of the experts in the industry forecasted that there would be a shortage of workers for the industry for the following several years. Therefore, this paper is aiming to enhance its competitiveness through the improving its revenues of MTC International, Inc. by providing with the foreign workers, especially from Philippines. Using SWOT Analysis, IE-Matrix with external and internal factor analysis, and SPACE matrix, those formulation tools suggest strategies for MTC International, Inc.

기초생활보장 수급자 자활사업에서의 정신보건사회사업 개입의 필요성

김원종 한국정신건강사회복지학회 2001 한국정신건강사회복지학회 학술발표논문집 Vol.2001 No.11

모드중첩법을 이용한 전단보 모델의 비선형 해석

김원종,홍성목 한국지진공학회 1999 한국지진공학회논문집 Vol.3 No.2

시간영역에서의 구조물의 해석은 직접적분법과 모드중첩법에 의하여 구해질 수 있다 그 중에서도 모드중첩법에 의한 해석방법은 몇가지 저차 진동모드를 사용하여 비교적 정확한 해를 구할 수 있기 때문에 동적해석에 널리 사용되고 있다, 그러나 비선형해석에서는 각 부재들의 상태에 따라 강성이 달라지므로 고유 진동모드를 정의할수 없거나 변화되는 강성에 따라 고유진동 모드를 지속적으로 다시 구하여야 하는 불편 있으므로 모드 중첩법을 이용한 비선형해석은 완전탄소성모델 등 극히 제한된 조건에서만 실행이 가능하였다 본논문에서는 강성행렬을 각 부재별로 분리시키고 비선형복원력과 초기선형복언력과 초기선형복원력의 차이를 하중항에 반영시킴으로써 모드중첩법을 이용하여 비선형 해석은완전탄소성모델 등 극히 제한된 조건에서만 실행이 가능하였다 본 논문에서는 강성행렬을 각 부재별로 분리시키고 비선형 복원력과 초기선형복원력의 차이를 하중항에 반영시킴으로써 모드중첩법을 이용하여 비선형해석이 가능한 방법을 제시하고자 한다. 특히 각 부재 강성을 각 부재의 상대변위의 함수로 나타냄으로써 연속적인 계산이 가능하게 하였다 본 논문에서 제시된 방법은 전단보모델에 적용하였으며 모드 개수를 변화시켜 지진하중에 의한 최대변위를 계산하여 이를 직접적분버에 의한 결과와 비교하였다. To analyze the dynamic behavior of structure, direct integration and mode superposition may be utilized in time domain analysis. As finite number of frequencies can give relatively exact solutions, mode superposition is preferable in analyzing structural behavior. In non-linear analysis, however, mode superposition is seldom used since time-varying element stiffness changes stiffness matrix, and the change of stiffness matrix leads to the change of essential constants - natural frequencies and mode shapes. In spite of these difficulties, there are some attempts to adopt mode superposition because of low cost compared to direct integration, but the result is not satisfactory. In this paper, a method using mode superposition in non-linear analysis is presented by separating local element stiffness from global stiffness matrix with the difference between linear and non-linear restoring forces to the external force vectors included. Moreover, the hysteresis model changing with the relative deformation in each floor makes it possible to analyze non-linear behavior of structure. The proposed algorithm is applied to shear beam model and the maximum displacement is compared with the result using direct integration method.

『國民 政府 』 保險醫療 政策方向

김원종 대한병원행정관리자협회 1998 병원관리 Vol.67 No.-

Crucible Boat 홀 크기와 정공 수송층 증착속도에 따른 유기밭광 다이오드의 전기적 특성

김원종,신현택,신종열,홍진웅,Kim, Weon-Jong,Shin, Hyun-Teak,Shin, Jong-Yeol,Hong, Jin-Woong 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.1

In the structure of ITO/N,N'-diphenyl-N,N' bis (3-methylphenyl)-1,1'-biphenyl-4,4'-diamine(TPD)/tris (8-hydroxyquinoline)aluminum($Alq_3$)/Al device, we studied the efficiency improvement of organic light-emitting diodes due to variation of deposition rate of hole transport layer (TPD) materials using hole-size of crucible boat. The thickness of TPD and $Alq_3$ was manufactured 40 nm, 60 nm, respectively under a base pressure of $5{\times}10^{-6}$ Torr using a thermal evaporation. The $Alq_3$ used for an electron-transport and emissive layer were evaporated to be at a deposition rate of $2.5\;{\AA}/s$. When the deposition rate of TPD increased from 1.5 to $3.0\;{\AA}/s$, we studied the efficiency improvement of TPD using the hole-size of crucible is 1.0 mm. When the deposition rate of TPD is $2.5\;{\AA}/s$, we found that the average roughness is rather smoother, the luminous efficiency the external quantum efficiency is superior to the others. Compared to the two from the devices made with the deposition rate of TPD is $2.0\;{\AA}/s$ and $3.0\;{\AA}/s$, the external quantum efficiency was improved by four-times and two-times, respectively.

IT 모듈에서의 열전달 해석과 방열 특성 연구

김원종 한국산업융합학회 2020 한국산업융합학회 논문집 Vol.23 No.3

In this Study, as the structure of IT module for smart phone display becomes thin to catch up with slim product trend, the reliability of display module is on the rise as a issue for product design. Especially, almost part of cellular phone should undergo thermal dissipation test. thus many manufacturers have considered design guide line using CAE and simulation for more effective usage of limited resources on the market. This test simulates the case when cellular phone slips through user’s fingers while he is talking on the phone. This paper studies a thermal simulation of display module in smart phone. This design for reliability improvements are suggested on the basis of the results of FVM Analysis and display of IT module and smart phone design.

The Determinants of Continuous Usage Intention for One-on-one Online English Education Program

김원종,강극주,김영철 한국인터넷전자상거래학회 2019 인터넷전자상거래연구 Vol.19 No.5

Recent development of Information Technology and changes in social paradigm into information society have brought a new vision of education field. Online learning, which is so called e-learning, is one of the new way of learning method beyond space and time. Especially in the foreign language learning field, internet-based learning which is one-on-one setting via computer software has been blowing up in terms of communication-based language acquisition. The main purpose of the study ,therefore, is to figure out the factors of service quality of one-on-one online English education program that may affect learners’ satisfaction and also continuous usage intention which take apart accordingly from the learners’ satisfaction. For this purpose, a survey has been conducted to online users who have experience in online english program from April 16, 2018 to April 29, 2018. The results of the study are as follows. First, the influence of service quality on learners’ satisfaction has been partially adopted. In other words, reliability, responsiveness, assurance, and empathy have shown significant association with learners’ satisfaction, while tangibility has not shown significant association with learners’ satisfaction. Second, the relationship of influence of learners’ satisfaction and continuous usage intention has shown significant association. This study is expected to suggest practical findings and implications for the researchers and practitioners in the industry of one-on-one online English education.

표준화동향 : 초근접 초고속 무선통신기술 개발 및 표준화 동향

김원종,이형호 한국정보처리학회 2012 정보처리학회지 Vol.19 No.6