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Highly Miscible All-Polymer Photodetectors with Green Selectivity and Detectivity
강진현,정인환 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
All polymer photodetectors (PPD) have the unique advantages such as strong absorption co-efficient, easy color tunability, solution processability, and strong mechanical properties com-pared to organic photodetectors using fullerene derivative acceptors. In most cases of PPDs, dark current (Jd) and responsivity (R) are in trade-off relationship. In this study, we enhanced photo detecting properties while lowering Jd using asymmetric non-fullerene acceptor (NFA). In addition, green-light (G) selectivity was also achieved by making both polymer donor and acceptor having similar G absorption area. The combination of donor and NFA with similar surface free energy levels resulted in a homogeneous and well-mixed morphology of the pho-to conductive layer, enhancing the photo detecting performances in PPDs.
PNN구조에 기반한 가스터빈 전력 시스템의 NOx 방출 패턴에 대한 퍼지모델
강진현,장경원,안태천 원광대학교 공업기술개발연구소 2002 工業技術開發硏究誌 Vol.22 No.-
In this paper, a fuzzy model based on the Polynomial Neural Network (PNN) structure is proposed to estimate the emission pattern for air pollutant in power plants. The new algorithm uses PNN algorithm based on Group Method of Data Handling (GMDH) algorithm and fuzzy reasoning in order to identify the premise structure and parameter of fuzzy implications rules, and the least square method in order to identify the optimal consequence parameters. Time series data for the gas furnace are used for the purpose of evaluating the performance of the new fuzzy model. This model is applied to data for the NOx emission process of gas turbine power plants. The simulation results show that the proposed technique can produce the optimal fuzzy model with higher accuracy and feasibility than other works achieved previously.
뉴로 퍼지기법을 이용한 엘리베이터 속도패턴의 정밀 제어
강진현(Jin-Hyun Kang),강두영(Do-young Kang),송윤제(Yun-Jae Song),안태천(Tae-Chon Ahn) 한국지능시스템학회 2004 한국지능시스템학회 학술발표 논문집 Vol.14 No.1
기존의 엘리베이터 시스템은 모든 교통 상황에 대해서 고정된 속도 패턴을 사용함으로써 교통량 변화에 다양한 속도 패턴을 제공 할 수 없었다. 운송 속도와 승차감은 엘리베이터 속도 패턴을 결정하기 위한 두개의 중요한 요소이다. 기통과 정지 시에 변속 충격을 줄이기 위해서 가속과 감속 시간이 적절히 조정되어졌다. 운송능력을 향상시키기 위해서 교통량 변화에 맞추어 저크를 조정하엿고 이와 같은 방법으로 6개의 속도 패턴 곡선과 엘리베이터의 속도 제어를 위해서 뉴로 퍼지 시스템을 구현하였다. 구현된 뉴로 퍼지 시스템은 2개의 입력변수와 1개의 출력을 가진 시스템이다. 전반부는 교통량의 변화를 나타내며 후반부는 입력에 대응되는 속도 패턴을 적용시켰다.
장지현,김종현,허재균,강진한,고대균,Chang, Ji Hyun,Kim, Jong Hyun,Hur, Jae Kyun,Kang, Jin Han,Koh, Dae Kyun 대한소아감염학회 1997 Pediatric Infection and Vaccine Vol.4 No.1
Toxic shock syndrome(TSS) is a multisystemic disease presenting with high fever, sunburn like rash that subsequently desquamates, and hypotension mainly caused by toxin producing strains of Staphylococcus aureus. It was first reported in 1978 by Todd et al, thereafter many patients have been reported. In children, TSS is rare and must be differentiated from other erythematous febrile diseases such as Kawasaki disease, scarlet fever, drug eruption etc. We experienced a case of TSS associated with staphylococcal cellulitis in 26-month old boy, who was presenting similar symptoms to Kawasaki disease at initial stage of illness. As time passed, the patient represented more typical symptoms of TSS and Staphylococcus aureus was isolated from cellulitis of the right elbow area. Therefore, we report this case with a brief review of related literatures.
최광현,강진수 영남이공대학 산업기술연구소 1996 産業技術硏究 Vol.9 No.-
The purpose of this study is to find a way to supplement and improve the assets revaluation system by examining financial ratios of 28 listed companies which revalued their assets in the period 1987~1989. This study is conducted with following steps; (1) 28 experimental samples are selected among listed companies which revalued their assets in the period 1987~1989. Also 28 matching samples, which did not revalued in the period of 1987~1989, are selected. (2) Financial ratios of experimental samples are compared with those of matching samples. Also the financial ratios prior to the revaluation are compared with those posterior to the revaluation. T-test & Kolmogorov-Smirmov test are applied to compare those financial ratios. In conclusion, it is proved that the assets revaluation takes an important effect upon firms capital structure. The assets revaluation might be conducted not for long-term management policies but for gaining financial benefits, offsetting deficits, and also off-setting deferred foreign exchange losses.