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이지홍,오영석,정병현 金烏工科大學校 1991 論文集 Vol.12 No.-
Fuzzy controller has been successfully applied to many cases to which conventional control algorithms are difficult to be applied. This is due to the uncertainty handling capability of fuzzy controller. In spite of the special internal processing mechanisms, the fuzzy controller is basically a crisp mapping from n dimensional space to m dimensional space; n and m are the numbers of output and input variable of the controlled system, respectively. The approximating capability the fuzzy controller with a given mapping, is studied in this paper.
최현성,이지현,윤석권,김한욱,임철완 대한피부과학회 2004 大韓皮膚科學會誌 Vol.42 No.3
Papillary eccrine adenoma is a rare benign sweat gland neoplasm. It occurs most often as a solitary nodule in women and is located predominantly on the distal portion of the extremities. This tumor is similar to tubular apocrine adenoma in histological and clinical aspects, so distinction of these tumors is still controversial. We report a case of two papillary eccrine adenomas developed on the left popliteal and calf area of a 58-year-old-man, this is the first report of the multiple papillary eccrine adenomas in Korea. (Korean J Dermatol 2004;42(3):353~355)
이지운,권기정,안현숙,고광준 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.3
Metastatic tumors to the jaw bones are uncommon. The most common metastatic tumors to the jaw bones are the breast, lung and kidney. In the jaw bones, the common location of the lesions is the mandible, and the posterior area of the mandible is more commonly affected. The radiographic appearance is quite variable. In this report, a very rare case of metastatic gastric adenocarcinoma to the mandible is presented. The patient had undergone a gastrectomy 3 years ago.
브롬이온존재하에서 플라즈마에 의한 암모니아의 탈질에 관한 연구
권지영,임익현,정팔진 全北大學校 附設 都市및環境硏究所 2000 都市 및 環境硏究 Vol.15 No.1
This study was the basic experiment of direct denitrification of NH_3-N. The synthetic wastewater(10㎎/L as NH_3-N) in presence of bromide ion was treated by plasma. The results as follows ; When bromide ion was not present in the wastewater, nitrification or denitrification did not occur. Denitrification of ammonia by plasma in presence of bromide ion was increased in proportion to bromide ion.
특수교육 현장에서 AAC 시스템의 활용에 대한 사용자의 경험 및 요구분석
김정연,황지현 이화여자대학교 특수교육연구소 2012 특수교육 Vol.11 No.3
This study was performed to identify the AAC users' requirement to improve the utilization of the AAC system and supplement of the high-quality AAC system to develop a fitting system for user convenience. To collect data, focus group and individual interviews were conducted. Thirty-four individuals (twenty-four specialist of special educations and ten parents) who assisted ten users of AAC system with disabilities were interviewed. The results of usability evaluation showed six themes and sixteen sub-topics by analysis of the transcribed interview contents were as follows. (1) the technical characteristics of the AAC system, (2) the contents of the AAC system, (3) the teaching and learning supports through the AAC system, (4) the utilization of AAC system user, (5) the utilization of AAC system facilitator, (6) the support of the various conditions. Based on these results, in order to increase the utilizability of the AAC system in the field of special education, the flexible user interface design considering the various levels and the ability of the user should be developed during initial development process and the further studies on ways to increase the efficiency of the AAC system based on continued usability evaluation should be continued. 본 연구는 보완·대체 의사소통(AAC) 시스템을 개발하는 과정에서 특수교육 현장에서의 AAC 사용자의 요구사항을 파악하여 AAC 시스템의 활용도를 높이고 고품질의 AAC 시스템을 보완하여 사용자 편의에 적합한 시스템을 개발하기 위해 수행되었다. AAC 시스템으로 마이토키(My Talkie) 사용자인 장애학생 10명을 직·간접적으로 지원한 특수교육 관련 전문가 24명, 대상 학생의 보호자 10명을 대상으로 개별면담과 포커스그룹 면담을 통한 자료를 수집하였다. 면담 내용을 전사하여 분석한 사용성 평가의 결과는 6가지 대주제와 16개의 하위주제로 도출되었으며, 결과는 다음과 같다. (1) AAC 시스템의 기술적 특성, (2) AAC 시스템의 내용, (3) AAC 시스템을 통한 교수-학습 지원, (4) 대상 학생의 AAC 시스템 활용성, (5) 촉진자의 AAC 시스템 활용성, (6) 제반 여건 지원 측면의 내용들이 제시되었다. 이러한 결과를 바탕으로 향후 AAC 시스템의 현장 활용 가능성을 높이기 위해서는 초기 개발 과정에서 다양한 사용자의 수준과 능력을 고려한 융통성 있는 사용자 인터페이스 설계가 이루어져야 할 것이며, 현장에서의 계속적인 사용성 평가를 바탕으로 AAC 시스템의 효율성을 높일 수 있는 방안에 대한 추후 연구들이 지속되어야 할 것이다.
익산천의 수질변동 특성과 수질오염 요인분석에 관한 연구
정팔진,임익현,김민정,권지영 全北大學校 附設 都市및環境硏究所 1999 都市 및 環境硏究 Vol.14 No.1
In this study, Variation Characteristics and Analysis of Water Pollution Factors in Iksan stream were investigated and samples were collected 7 times during this study period at nine points. The water quality criteria of Iksan stream is first grade but it is over fifth grade because of domestic wastewater and livestock wastewater. Particularly, livestock wastewater from Wang-kung affect water quality of Iksan stream. So livestock wastewater should be controlled to recover water quality of Iksan stream.
구내 표준 방사선사진을 이용한 구내방사선촬영기의 선질 평가
이상섭,권혁락,심우현,오승현,이지연,전국진,김기덕,박창서 대한구강악안면방사선학회 2000 Imaging Science in Dentistry Vol.30 No.3
Purpose : This study was to evaluate the beam quality of intraoral X-ray equipments used at Yonsei University Dental Hospital (YUDH) using the half value layer (HVL) and the characteristic curve of intraoral standard X-ray film. Materials and Methods : The study was done using the intraoral X-ray equipments used at each clinical department at YUDH. Aluminum filter was used to determine the HVL. Intraoral standard film was used to get the characteristic curve of each intraoral X-ray equipment. Results : Most of the HVLs of intraoral X-ray equipments were higher than the least recommended thickness, but the REX 601 model used at the operative dentistry department and the X-707 model used at the pediatric dentistry department had HVLs lower than the recommended thickness. The slopes of the characteristic curves of films taken using the PANPAS 601 model and REX 601 model at operative dentistry department, the X-705 model of prosthodontic dentistry department, and the REX601 model at the student clinic were relatively low. Conclusion : HVL and the characteristic curve of X-ray film can be used to evaluate the beam quality of intraoral X-ray equipment. In order to get the best X-ray films with the least radiation exposure to patients and best diagnostic information in clinical dentistry, X-ray equipment should be managed in the planned and organized fashion. (Korean J Oral Maxillofac Radiol 2000; 30: 183-188)
Comparing Elder Users' Interaction Behavior to the Younger
Ji Hyoun Lim,Taebeum Ryu 대한인간공학회 2012 大韓人間工學會誌 Vol.31 No.2
Objective: This study presents an observation and analysis on behavioral characteristics of old users in comparison to young users in the use of control on display interface. Background: Touch interface which allows users to control directly on display, is conceived as delight and easy way of human-computer interaction. Due to the advantage in stimulus-response ensemble, the old users, who typically experiencing difficulties in interacting with computer, would expected to have better experience in using computing machines. Method: Twenty nine participants who are over 50 years old and 14 participants who are in 20s years old were participated in this study. Three primary tasks in touch interface, which are tap, move, and flick, were delivered by the users. For the tap task, response time and point of touch response were collected and the response bias was calculated for each trial. For the move task, delivery time and the distance of finger movements were recorded for each trial. For the flick task, task completion time and flicking distance were recorded. Results: From the collected behavioral data, temporal and spatial differences between young and old users behavior were analyzed. The older users showed difficulty in completing move task requiring eye-hand coordination.