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이산 웨이블릿 변환과 신경회로망을 이용한 FRTU의 고장판단 능력 개선에 관한 연구
洪大昇(Dae-Seung Hong),高鈗錫(Yoon-Seok Ko),姜泰求(Tae-Ku Kang),朴學烈(Hak-Yeol Park),任化永(Hwa-Young Yim) 대한전기학회 2007 전기학회논문지 Vol.56 No.7
This paper proposes the improved fault decision algorithm using DWT(Discrete Wavelet Transform) and ANNs for the FRTU(Feeder Remote Terminal Unit) on the feeder in the power distribution system. Generally, the FRTU has the fault decision scheme detecting the phase fault, the ground fault. Especially FRTU has the function for 2000㎳. This function doesn't operate FI(Fault Indicator) for the Inrush current generated in switching time. But it has a defect making it impossible for the FI to be operated from the real fault current in inrush restraint time. In such a case, we can not find the fault zone from FI information. Accordingly, the improved fault recognition algorithm is needed to solve this problem. The DWT analysis gives the frequency and time-scale information. The new-a! network system as a fault recognition was trained to distinguish the inrush current from the fault status by a gradient descent method. In this paper, fault recognition algorithm is improved by using voltage monitoring system, DWT and neural network. All of the data were measured in actual 22.9㎸ power distribution system.
김영주 ( Young Joo Kim ),김아름 ( A Rum Kim ),고윤석 ( Yoon Seok Ko ),김소현 ( So Hyun Kim ) 연세대학교 언어연구교육원 한국어학당 2012 외국어로서의 한국어교육 Vol.37 No.-
A Study on the Development of Acceptability Judgment Test Measuring Korean Pragmatic Ability. Teaching Korean as a Foreign Language, 37, 41~64. The purpose of the study is to develop a test tool for acceptability judgement, which measures acquisition of pragmatic features of Korean language learners. To meet the purpose, Korean as foreign language speech act studies were analyzed. Acceptability judgement test was developed on three speech acts that are request, refusal and apology considering power and distance variables. This study conducted two preliminary tests with Korean native speakers and Korean language learners and verified its validity and reliability. This study has significant meaning that it demonstrates the development of acceptability judgment test to measure Korean language learners`` acquisition of individual pragmatic ability.
김성호 ( Seong Ho Kim ),임희영 ( Hee Young Lim ),조유숙 ( You Sook Cho ),김찬 ( Chan Kim ),유빈 ( Bin Yoo ),고윤석 ( Yoon Seok Ko ),김우성 ( Woo Seong Kim ),문희범 ( Hee Bom Moon ) 대한류마티스학회 1998 대한류마티스학회지 Vol.5 No.1
Relapsing polychondritis, a rare multisystem disease, is characterized by widespread potentially destructive inflammatory lesions, involving cartilaginous structures throughout the body. Auricular chondritis is the most frequent presenting sign of this disease, with arthritis being the second. Other clinical menifestations include nasal chondritis, scleritis, damage to tracheobroncheal cartilage, and cardiovascular and renal involvement. We experienced three cases of relapsing polychondritis. One case is 66 year old male with bilateral auricular chondritis with histologic confirmation, episcleritis, polyarthritis, periarterial vasculitis, and sensorineural hearing loss. Another case is 42 year old male with respiratory, nasal, auricular chondritis and psoriasis with arthritis. The third case is 46 year old female with three year history of relapsing polychondritis, presenting bilateral auricular and nasal chondritis and severe respiratory tract involvement with histologic confirmation. We also reviewed the other case reports of relapsing polychondritis in Korea. The major presenting manifestations of relapsing polychondritis in Korea were respiratory tract symptoms of dyspnea, cough, and sputum. That is, auricular chondritis was less frequent than laryngotracheal-bronchial involvement.