http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김강대(Kang dae Kim),허영헌(Yong-Xian Xu),이명원(Myung Won Lee),류기성(Gi Seong Ryu),송정근(Chung Kun Song) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
In this paper we demonstrated the applications of OTFTs (organic thin film transistors) to flexible displays such as AM-EPD (active matrix electrophoretic display) and AM-OLED (active matrix organic light emitting diode), and also to integrated circuits. The OTFTs using pentacene semiconductor layer and PVP gate dielectric and Au S/D electrodes exhibited good performance for AM-EPD with the mobility of 0.59 ㎠/V.sec, and with also good uniformity over 2.5 diagonal area. However, it is nor enough for AM-OLED requiring the mobility larger than 1 ㎠/V.sec for large area displays. The integrated circuits also worked, producing the operating frequency of 1MHz. We need to develop a fabrication process to reduce parasitic capacitance for high frequency operation.
실 도로 주행 시험과 동적 시뮬레이션을 적용한 전기자전거 도로주행 성능 평가에 관한 연구
강대경(Dae Kyung Kang),서상근(Sang Guen Seo),박완규(Wan Kyou Park),김홍진(Hong Jin Kim),김민수(Min Soo Kim) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Through prior test, we found it was possible to evaluate the drive performance of e-bike such as maximum speed and energy consumption efficiency by motor testing in motor dynamometer. In this study, we have performed drive test of e-bike on real uneven-road and acquired raw data like voltage, current, revolution speed of wheel, etc through mobile data acquisiton system (DAQ). After analyzing raw data, we have applied load, velocity and power profile of e-bike on road condition in motor dynamometer and by using P-I control, we adjusted motor’s load to setting load corresponding to speed and verified availability and reliability of dynamic simulation.
김성화 ( Sung Hwa Kim ),임지혜 ( Jihye Lim ),강대용 ( Dae Ryong Kang ) 한국보건정보통계학회 2023 보건정보통계학회지 Vol.48 No.6
With the advancement and acceleration of digital technology, the demand and supply of healthcare big data are increasing. In Korea, the government and companies have made various efforts to utilize healthcare big data, such as deregulation data-related legal regulations and data linkage between different institutions. As a result, many researchers have been able to access a variety of healthcare big data. Although healthcare big data has a vast amount and high value, many researchers are unable to fully access healthcare big data because there are difficulties in processing, analysis, and interpretation for data. The data visualization is recognized as an important tool that can solve these limitations. Using data visualization, researchers can intuitively understand complex data and receive support for decision-making. Additionally, these visualizations promote effective communication between experts in different fields and between experts and non-experts. Visualization is used in a variety of research fields and processes, including data summarization, data exploration, and evaluation and interpretation of predictive models. Various types of visualization have different meanings depending on how they are expressed. Therefore, it is important to express the meaning of visualization appropriately. This study provides representative examples of visual representations for data summarization, data exploration, and predictive model evaluation. This study aimed to improve easier access and utilization of healthcare big data by providing R code and visualization results.
강대실 ( Dae Sil Kang ),김무진 ( Moo Jin Kim ),문원규 ( Won Kyu Moon ) 한국센서학회 2010 센서학회지 Vol.19 No.2
The capacitive sensor has a simple structure, compact size and low cost, but a small dynamic range. The small range is caused by use of gap variation. If the sensor takes area variation type with one plate moving horizontally, it can have a large measurable range. While the area variation has relatively low sensitivity, some studies have found methods to improve the sensitivity. Even though the methods are effective, parameters of the results are limited and 2 dimensional. This study provides more practical and 3 dimensional analysis and suggests relations between parameters. Using the results, the optimized design parameters of a high dynamic range capacitive sensor can be found.
단변량 기후반응함수를 이용한 금강수계 이수안전도 평가: 하천유지유량 관리 변화를 고려한 사례연구
김대하,최시중,장수형,강대후,Kim, Daeha,Choi, Si Jung,Jang, Su Hyung,Kang, Dae Hu 한국수자원학회 2023 한국수자원학회논문집 Vol.56 No.12
대기온실가스 증가로 전지구 평균기온은 산업화 이전 대비 1.1℃ 상승했고 수자원시스템의 공급능력에 상당한 변화가 예상된다. 본 연구에서는 금강수계 내 여러 중권역의 이수안전도와 기후조건의 관계(기후반응함수)를 단변량 함수로 나타내 기후민감도를 동시에 평가할 수 있는 방법을 제안하였다. 사례연구를 위해 GR6J 모형으로 중권역별 자연유출을 모의했고 이를 Water Evaluation And Planning (WEAP) 최적모형에 입력해 2030년 수요전망에 대한 공급신뢰도를 평가하였다. 여러 중권역의 이수안전도를 동시에 비교하기 위해 평균 강수량과 잠재증발산량의 비율을 독립변수 사용하여 단변량 기후민감도 함수를 개발하였다. 사례연구 결과, 1991-2020 자연유출을 이용해 수계전체 물부족을 최소화시키는 운영을 가정했을 때 공급신뢰도는 19개 중권역 중 보청천유역에서 가장 낮았다. 하천유지유량의 우선순위를 농업용수와 생공용수과 동일하게 조정한 시나리오에서는 보청천유역, 초강유역, 논산천유역의 이수안전도가 크게 감소하는 것으로 나타났다. 보청천유역, 초강유역, 논산천유역의 이수안전도는 모든 기후스트레스 테스테에서 크게 감소한 반면, 미호강유역, 금강공주유역, 금강하구유역은 아주 건조한 기후조건에서만 이수안전도가 감소했다. 대규모 인프라에서의 공급이 원활한 중권역의 기후민감도는 크게 변하지 않았다. 2021-2050 기후전망을 민감도함수에 적용했을 때 금강수계의 공급신뢰도는 대체로 좋아질 가능성이 높지만 하천유지유량 우선순위를 높이게 되면 지형적, 인위적으로 고립된 중권역에서 물부족은 심해질 것으로 분석되었다. 2021-2050기간 금강수계의 이수안전도는 기후스트레스 보다 하천관리정책의 변화에 더 큰 영향을 받을 것으로 판단된다. Due to the increasing greenhouse gas emissions, the global mean temperature has risen by 1.1℃ compared to pre-industrial levels, and significant changes are expected in functioning of water supply systems. In this study, we assessed impacts of climate change and instreamflow management on water supply reliability in the Geum River basin, Korea. We proposed univariate climate response functions, where mean precipitation and potential evaporation were coupled as an explanatory variable, to assess impacts of climate stress on multiple water supply reliabilities. To this end, natural streamflows were generated in the 19 sub-basins with the conceptual GR6J model. Then, the simulated streamflows were input into the Water Evaluation And Planning (WEAP) model. The dynamic optimization by WEAP allowed us to assess water supply reliability against the 2020 water demand projections. Results showed that when minimizing the water shortage of the entire river basin under the 1991-2020 climate, water supply reliability was lowest in the Bocheongcheon among the sub-basins. In a scenario where the priority of instreamflow maintenance is adjusted to be the same as municipal and industrial water use, water supply reliability in the Bocheongcheon, Chogang, and Nonsancheon sub-basins significantly decreased. The stress tests with 325 sets of climate perturbations showed that water supply reliability in the three sub-basins considerably decreased under all the climate stresses, while the sub-basins connected to large infrastructures did not change significantly. When using the 2021-2050 climate projections with the stress test results, water supply reliability in the Geum River basin was expected to generally improve, but if the priority of instreamflow maintenance is increased, water shortage is expected to worsen in geographically isolated sub-basins. Here, we suggest that the climate response function can be established by a single explanatory variable to assess climate change impacts of many sub-basin's performance simultaneously.
김의태(Eui Tae Kim),강대중(Dae Joong Kang) 한국평생교육학회 2012 평생교육학연구 Vol.18 No.3
노숙인은 자신의 삶을 변화시키기 위한 장기적이고 체계적인 교육기회를 얻기가 어렵다. 이런 점에서 평생교육의 장에서 진행되고 있는 노숙인 대상 인문교양교육은 응급 구호와 물질적 차원의 일시적 지원과 달리 자존감 회복과 자기성찰을 통해 자립할 수 있는 근원적인 힘을 확보하는 통로라 할 수 있다. 이 연구에서는 노숙인이 인간으로서의 존엄성과 가치를 회복하고 장기적으로 삶의 방향을 재설정하는 계기로서 인문교양교육이 어떻게 작동하는지를 살펴보기 위해 대한성공회 노숙인다시서기지원센터가 운영하고 있는 〈성프란시스대학 인문학과정〉을 사례로 삼았다. 이 사례를 통해 노숙인을 성인 학습자로 간주하는 프로그램의 구조와 특성을 제시하고, 실제 프로그램 참여 노숙인의 학습경험이 어떤 양상으로 전개되었는지를 제시했다. 노숙인은 참여과정에서 ‘경계’에 서있는 학습자로서 경제적 어려움과 현실과의 괴리감 등으로 내적 갈등을 겪기도 했지만, 대화와 토론, 글쓰기 경험을 통해 자신의 생애경험과 맞물려 인문학적 질문들에 대한 성찰과 실존적 대화를 경험했다. 또 교육프로그램이 하나의 생활세계로 자리 잡으면서 타인과의 갈등을 해소하며 관계를 형성하는 과정을 학습하기도 했다. 이러한 분석을 통해 노숙인 문제를 해결하기 위한 평생교육적 접근의 필요성과 의의를 논의했다. Disconnected from the previous life, homeless people seem to live only for survival. Especially, because the homeless are disadvantaged groups, they are socially excluded from educational programs that provide chances to change their lives. In this sense, it is important for them to participate in the non-formal humanities education program aiming to empower them so as to stand by themselves. This study examined a Korean Clement course for the homeless in terms of its program content and principles of management. The participating homeless people learned how to practice self-respect and self-reflection. The educational intervention is different from providing food and shelter. Educational intervention assumes the homeless as active learners. As successful cases through participation in the humanities education program are reported continuously, it proves that learning experiences through educational program can give adult homeless learners a transformative opportunity for life. We should provide the homeless with various educational programs that aim to recover human dignity and find a better way of life.