http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
특정주파수 소음제거를 위한 능동소음제어식 청각보호구 개발연구
김동균,김옥현,Kim, Dong-Gyun,Kim, Ok-Hyeon 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.12
Acoustic noise has become an increasingly important issue, especially in the industrial environment. Nowadays home and office are not exceptional, mainly due to the increase in the usage of machinery. Active Noise Control(ANC) becomes efficiently an available tool for the noise suppression with rapid advances of solid state electronics. In this study an ANC system is developed for audio headphone to work as a noise protector, so called an ear-muff. The system is developed to kill a certain frequency band noises selectively which is purposed to suppress only the dominant ambient noise such that normal numan conversation is not disturbed with wearing the ear-muff. For the purpose, an ANC design strategy is suggested and implemented with an analogue control circuit. The performance is evaluated by frequency response test, which shows well consistence with theoretical one. The results are so satisfactory that noise of 640 Hz, which is aimed to suppress, is reduced by 20db without significant distortion in other frequency band.
천연 소재 BF-7의 어린이 장ㆍ단기 기억력 향상 효과
김도희(Do-Hee Kim),김옥현(Ok-Hyeon Kim),여주홍(Joo-Hong Yeo),이광길(Kwang-Gill Lee),박금덕(Geum Duck Park),김대진(Dae-Jin Kim),정윤희(Yoon-Hee Chung),김경용(Kyung-Yong Kim),이원복(Won-Bok Lee),윤영철(Young Chul Youn),정윤화(Yoonhwa C 한국식품영양과학회 2010 한국식품영양과학회지 Vol.39 No.3
본 연구는 BF-7이 어린이의 장기 및 단기 기억을 현저하게 촉진시킴을 보여주었다. 기존 임상 시험 결과를 통해 입증된 바와 같이 천연 소재인 BF-7의 안전성을 고려할 때, BF-7은 어린이 장기 및 단기 기억력, 기억유지도 및 기억의 효과적 활용 등 전반적인 기억 수행 능력 향상에 도움을 주는 매우 안전하면서 효과가 탁월한 천연소재임을 확인하였다. It has been shown that BF-7 enhances short- and long-term memory and attention in normal person. BF-7 was addressed to clinical study for children if BF-7 is also effective to children, since accumulated verification of safety and effectiveness is needed for young ages, in special. We administered BF-7 and a placebo control to two different groups of children (7-12 years old, 9.78 on averages). Their memory enhancement was tested with Rey-Kim Memory Test for Children before and after the administration of BF-7 and a placebo, in a double blinded way. The results showed that long- and short-term memories were significantly improved by the administration of BF-7. Interestingly, the degree of memory preservation, the ability of memory application and awareness of complex thing were also significantly improved. These results indicate that BF-7 is a promising substance from natural resource improving learning and memory of children as well as cognitive function of adults
최은주(Eun Ju, Choi),김옥현(Ok Hyeon, Kim),정종필(Jong Pil, Jeong) 한국간호연구학회 2019 한국간호연구학회지 Vol.3 No.2
Purpose : This methodological study was conducted to develop and validate the scale of the nursing informatics competence for nursing students. Methods : Data collected from 639 nursing students were utilized to test the validity and reliability of preliminary tool. Validity and reliability analyses included content, construct, factor analysis, and cronbach’s alpha were used for the analysis. Results : Twenty-five items were selected for final scale, and categorized into 3 factors explaining 78.3% of the total variance. Each of the factors were named as follows; ‘computer skills competence’(12 items), ‘informatics skills competence’(5 items), ‘informatics knowledge competence’(8 items). Cronbach’s alpha was .90 and the reliability of the sub-scales ranged from .84 to .88. Conclusion : The results show that this scale can provide scientific data when evaluating the effectiveness of programs regarding nursing informatics competence of nursing students.
이해균 ( Hae Gyun Lee ),김옥현 ( Ok Hyeon Kim ) 한국특수교육문제연구소 2008 특수교육저널 : 이론과 실천 Vol.9 No.1
본 연구는 시각장애학교와 일반학교 중.고등학생의 국어 어휘의 요인별 즉, 동의어, 반의어, 하위어, 유의어 이해력과 정답률 차이, 시각장애학생의 변인에 따른 어휘력 차이에 대한 실태를 조사하여 서로 어떠한 차이가 있는지 비교함으로써, 시각장애학생의 국어 어휘 지도에 기초 자료로 활용할 수 있도록 하는데 연구의 목적이 있다. 연구의 대상은 시각장애학생 120명과 정안학생 191명, 총 311명으로 전국에 소재한 시각장애학교와 서부 경남에 소재한 일반학교에 재학 중인 중.고등학생이다. 연구의 결론으로는 첫째, 시각장애학생과 정안학생의 요인별 국어 어휘력의 비교에서는 정안학생들이 시각장애학생보다, 중학생보다는 고등학생의 어휘력이 높았으나, 전체적인 비교에서 정안 중학생과 시각장애 고등학생 간에는 차이가 없었다. 둘째, 시각장애학생과 정안학생의 어휘력의 요인별 정답률 비교에서는 모든 요인에서 정안학생이 시각장애학생보다 정답률이 높았다. 그러나 하위어 ‘시대에 따른 소설’ 문항과, 유의어 ‘춘부장’과 ‘샛별’ 문항의 정답률은 시각장애학생의 정답률이 약간 높았다. 셋째, 시각장애학생의 변인별 어휘력 비교에서는 맹학생보다는 저시력 학생이, 기숙사보다는 자택에 거주하는 학생이, 선천성보다는 후천성 학생의 어휘력이 다소 높았으나 변인에 따라 통계적으로 유의한 차이는 없었다. The purpose of this study is looking into comparing the comprehension of Korean vocabulary elements composed of absolute synonyms, antonyms, hyponyms and partial synonyms of the visually impaired with that of normal students, and the difference of the vocabulary ability according to the variable elements of the visually impaired so as to use this research in teaching the visually impaired the Korean vocabularies. The concrete methods to achieve this purpose are as follows. First, I will find out the comprehension difference of Korean vocabularies and the normal students. Second, I will find out the percentage of correct answers to Korean vocabularies between the visually impaired and the normal students. Third, I will find out the difference of vocabulary ability according to the level of visual handicap, the type of residence and the time of visual handicap. I make up a question to 120 visually impaired students all around the country and 191 middle and high school students in the western Gyeong Sang Nam Do. The research of this study was carried out for a month from May 10th, 2006 to June 10th, 2006. I called the school for the visually impaired and the normal school beforehand, got a permission to make a research and then post research papers to them. The question paper was translated into Braille to the blind and enlarged into 20 point to the students having a bad eyesight. The 150 copies of research paper was sent to the visually impaired and 200 copies of them to the general schools. The 120 copies of them was brought back from the visually students and 191 copies of them from the normal students. The research paper were analyzed with SPSS 10.0 for windows. The dual variable analysis is used for the comparison of vocabulary ability between the visually impaired and the normal students. The frequency analysis is used for the comparison of correct answers in each element of vocabulary ability. And The independent T analysis is used for the comparison of vocabulary ability according to characteristics of the visually impaired. The conclusion based on this analysis is as follows. First, the vocabulary ability of normal students is higher than that of the visually impaired students. And the vocabulary ability of the visually impaired students in high school is higher than that of the visually impaired students in middle school. But there is little difference between the normal students in middle school and the visually impaired students in high school. Second, the percentage of correct answers of normal students is much higher than that of the visually impaired students. But The visually impaired students answered the questions of hyponyms of ‘novels according to an era``, partial synonyms of ‘other people’s father`` and the percentage of correct answers of ‘Venus`` better than the normal students. Third, the vocabulary ability of students having bad eyesight, living in their own house and having acquired visual disability is higher than the blind, the students living in the dormitory and having inborn visual disability. And the vocabulary ability of urban students is higher than that of rural students. But there is little difference between the vocabulary of the normal students in the country and that of the visually impaired students in the city.