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공업계 고등학교 전자과의 수학 교과와 전문 교과간 연계성 분석
나정욱(Jeong Wook Na),김청월(Cheong Worl Kim),김종성(Jong Seong Kim) 대한공업교육학회 2001 대한공업교육학회지 Vol.26 No.2
Correlation between mathematical & engineering contents has been studied with respect to the curriculum of the Electronics major in Korean vocational high schools. Results showed that poor correlation between these contents might be one of major factors responsible for harsh situations which Korean vocational high schools have recently faced such as, lack of incoming students, high dropout rate and low academic achievement of enrolled students, etc. Demand for easier and more practical textbooks for vocational education is also demonstrated.
소규모 사무공간에서의 건물 외피 성능에 따른 EnergyPlus와 eQuest 시뮬레이션 결과 비교에 관한 연구
나정욱(Na, Jung-Wook),박두용(Park, Doo-Yong),김강수(Kim, Kang-Soo) 대한건축학회 2015 대한건축학회논문집 Vol.31 No.6
The purpose of this study is to compare two building energy simulation programs"(EnergyPlus and eQuest) heating/cooling load, and to find the differences by analyzing algorithm, input method and default input parameters based on the ASHRAE Standard 140-Case600. EnergyPlus calculates the inside surface temperatures by solving the heat balance, but eQuest assumes that the inside surface temperature of a thermal zone is equal to the zone air temperature. This result in zone air temperature difference(1.16 ℃ average) is due to occurred load differences. Change of U-value of vertical surface causes as 7∼8 % of the heating load difference and 25∼26 % of the cooling load difference. The result of changed SHGC is similar. But the result from infiltration shows a little different tendency(The heating load differences decrease from 7 % to -16 % and cooling load differences increase from -26 % to -19 %). All of these differences are caused by algorithm discrepancies of convection coefficients, actual air change rate and solar transmittance.
이중언어자에서 보인 두 형태의 실어증 : 증례보고 A Case Report
나해리,이정욱,박성민,박수열,권순용,이현정 대한치매학회 2004 Dementia and Neurocognitive Disorders Vol.3 No.2
Since many people in Korea know more than one language, bilingual aphasia is an important line of research in clinical and theoretical neurolinguistics. Nowadays we meet many people who speak other languages along with Korean, who are immigrants from foreign countries, especially from China. Differential recovery of language affected by an aphasic deficit is documented. In the present work, we introduced a patient with bilingual aphasia who showed different recovery patterns in Korean and Chinese. A 66-year-old man was presented with language disturbance and right hemiplegia. On past medical history, he had received a hematoma evacuation through burr-hole due to left basal ganglia hemorrhage. After the event, he showed nearly global aphasia in Korean, but he showed minimally preserved language function on comprehension and fluency in Chinese. This result suggests that aphasia in bilingual subject may show different pat-terns of recovery between two languages.
공동주택 측벽의 부위별 표면온도 측정을 통한 단열 성능 평가에 관한 연구
고정림,김형근,김미연,이보람,안은섭,나정욱 한국냄새환경학회 2018 실내환경 및 냄새 학회지 Vol.17 No.3
This study aims to evaluate thermal performance using the ASTR method. Its findings are as follows: 1) The measured U-Values of 49A type and 59A type walls were almost the same as the theoretically calculated values. 2) One notable phenomenon for both walls was that the interior surface temperatures of the channels attached to corners were up to 10.4% lower than that of the cross of the wall, even though they consisted of the same materials. This is due to the surface temperature drop caused by the thermal bridge. 3) The surface temperatures of the thermal bridge were converted into U-Values. The U-Value of the top left corner on the 59A type house was 1.044W/m²K, and of the bottom right corner on the 49A type house was 0.959W/m²K. Therefore, the thermal performance of the thermal bridge area was decreased after construction. 4) Differences were found in the results of comparing heat transfer analysis simulation data and measured data. A maximum difference of 12.4% occurred in the top left corner on 59A type, and of 7.6% occurred in the bottom right corner on 49A type. 5) The results of a heat transfer analysis simulation showed that the temperature of both 49A type and 59A type top right corner were the lowest, but in-situ measurement results were the lowest in the bottom right corner on 49A type and in the top left corner on 59A type. These results are considered to be due to the occurrence of thermal bridges and a deterioration in the construction quality.