• 한국초전도ㆍ저온공학회논문지
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• 제21권3호
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• pp.38-42
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• 2019

To protect the power systems from fault current, the rated protective equipment should be installed. However growth of power system scale and concentration of loads caused the large fault current in power transmission system and distribution system. And capacities of installed protective equipment have been exceeded the due to increase of fault current. This increase is not temporary phenomenon but will be steadily as long as the industry develops. The power system need a counter measurement for safety, so superconducting fault current limiter (SFCL) has been received attention as an effective solutions to reduce the fault current. For the above reasons various type SFCL is studied recently. In this paper, the operational characteristics and power burden of trigger type SFCL is studied. The trigger type SFCL has been used for real system research in many countries. And another trigger type SFCL (double quench trigger type SFCL) is also studied. For this paper, short circuit test is performed.

• 한국통신학회논문지
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• 제27권1A호
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• pp.58-65
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• 2002

본 논문은 음향반향제거기에서 상관계수를 이용하영 동시통화(Double-Talk) 구간을 검출할 때 발생하는 끝점검출 지연 문제에 대하여 다룬다. 동시통화가 끝나는 지점과 같이 신호의 전력이 급격하게 줄어드는 구간에서 망각지수(Forgetting Factor0를 사용하여 전력을 추정할 경우, 추정된 현재 전력은 과거 전력의 영향으로 급격하게 줄어들지 못하여 끝점검출 지연이 발생한다. 본 논문에서는 끝점검출 지연을 줄이기 위한 방안으로 두 가지 방법을 제안하였다. 하나는 일정 간격마다 새로운 평균 전력을 구해서 현재의 추정 전력으로 사용하는 방버이고, 다른 하나는 순환식에서 일정 구간마다 과거의 큰 전력 성분을 제거하거나 들는 값으로 대체하는 방법이다. 제안된 방법은 기존의 방법에 비해 계산량에서는 큰 증가를 보이지 않으면서 끝점검출 성능에서는 우수함을 실험을 통해 확인하였다.

• 동의신경정신과학회지
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• 제26권3호
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• pp.211-224
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• 2015

Objectives: This study aimed to investigate gender differences in the Korean Medical Community. Methods: Participants in the research study included 90 students regularly attending the fourth grade in Korean Medicine College, of which 48 were male and 42 were female. Results: 1. Patient's preferences for female KMD (Korean Medicine Doctor) had the lowest response rate in Korean Medical Society. Preferences for male KMD were due to factors including comfort level, rationality, good training, and patient's preference. 2. Patient's preferences for female KMD had the highest response rate in Gynecology, and Pediatrics. On the other hand, patient's preferences for female KMD had the lowest response rate in the other 7 specialty subjects. 3. The reasons for gender discrimination against male KMD were lack of subtlety, lack of empathy, authoritative attitude, and lack of patient management skills. The reasons for gender discrimination, against female KMD were childcare burden, social prejudices, lack of physical strength, and housekeeping burdens. Conclusions: The study results indicated that there was a lower preference for female KMD than male KMD among the Korean Medical Society and in patients' consciousness. Male-centered culture of Korean Medical Society had no role in this finding, but masculine image for KMD jobs and work-family double burden for female KMD were important contributing factors.

• 대한안전경영과학회지
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• 제20권3호
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• pp.1-9
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• 2018

This study is intended to look into the effect of construction safety supervision system on risk control and reduction. To achieve this, a survey was carried out to 114 companies in construction, ordering, contract and management. The overall findings were as follows. The effect of construction safety supervision system on risk control and reduction showed that factors of supervision system, supervision cost and supervision method had a positive effect on risk control and reduction. And their perception of the introduction of safety supervision system in construction sites according to process showed that there was a difference between them according to the field of ordering, contract and supervision. There was the biggest difference between owner and contractor in double supervision system, but no difference between them in the perception of risk reduction. These results show that all ordering, contract and supervision are positively needed for the introduction of construction safety supervision. This means that there is a difference between owner and contractor in the perception of process according to system operation. All companies agree to system improvement by the settlement of safety supervision system for the prevention of safety accidents and safe construction, but the systematic complement of safety supervision is the burden of contractor. And there is a big difference between owner and contractor in the perception of responsibility and concern for cost burden.

• 한국산업융합학회 논문집
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• 제23권2_2호
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• pp.209-218
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• 2020

Various studies and business investments have been performed on UAV in the field of spatial information industry, and it is judged that this industry has being evolved into an expansion stage as a legalization progresses. In addition, public institutions such as Korea Land and Geospatial Information Corporation, Korea Expressway Corporation, and Korea Land and Housing Corporation which have relatively much utilized spatial information work have entered into the stage of settling with active introduction for reasons of work efficiency and business management. However, surveying drones are still classified as expensive equipment, which is a burden on general business application and technology popularization. Moreover, the stabilization of reliability of various location information acquired from UAV is a part of ongoing research and supplementation. Therefore, in this study, to use image information acquired from low-cost UAV as reliable spatial information data, the flight altitude was changed and compared with the result of double transverse flight with conventional photographing technique. As a result, there was no change in the result value at low altitude, but the result showed more than 30% accuracy and accuracy improvement for the X, Y value at the altitude of 130m or higher than the conventional method.

• 대한가정학회지
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• 제49권5호
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• pp.81-96
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• 2011

This study analyzed the time use of dual income paid workers. The data was selected from the '2009 Korean Time Use Survey' by the Korean National Statistical Office. There were 2799 respondents who were paid workers with dual income. There were big differences in time use between men and women. The result showed that men's time allocation focused on 'labor and leisure' and women's time allocation focused on ‘labor and housework'. This means the women among dual income paid workers faced difficulties in dual burden of work-family balance. Regression analysis on time use dividing men and women showed that age, education, income, working type and the presence of preschool children had significant effects on time allocation. We found the income effects on time use which reduced paid working time and increased housework and leisure time. Significantly, younger men who have preschool children spend more time in housework. We could find the possibility of a change in men's time allocation.

• 대한가정학회지
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• 제36권9호
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• pp.153-166
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• 1998

In this study commuter marriage was defined as a family in which working husband and wife, who have professional job having family orientation and job orientation, come and go lived separately for more than days a week for working in different region. This study examined the determinants of living separately the merits and demerits of commuter marriage, relation with family, family finance and household work for twelve case wives fitted for above definition, and the findings are as the following. The main cause of commuter marriage was wife's work place. The merits of commuter marriage were that wives can devote to their own increased time and that they had fresh feeling to their husbands. The demerit were mental burden to mother-in-laws and their mothers who take charge of home management and the high cost of living for double housekeeping. In the area of relation with family, they and their husbands call above one time per day for communication although they live separately for three or four days, do not insist on norms of living together, and overcome difficulties of commuter marriage well. In the area of family six couples used allowances method. They have high living cost like traffic expenses, telephone charges, and housing expenses because of double living. In the area of household work, they mainly manage family life with the help of household helpers like mother-in-laws or their own mothers.

• 응용통계연구
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• 제36권6호
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• pp.619-629
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• 2023

비료는 작물 생산성을 높이는데 중요한 역할을 하지만 작물의 양분요구량을 고려하지 않은 비료 과다 사용은 농가 경영비 부담과 환경 부하를 높힐 우려가 있다. 스마트 농업을 통해 작물의 생장 특성을 반영하여 시기별로 필요한 만큼 비료를 공급하면 비료 유실에 대한 부담을 줄이고, 경제적인 양분관리 효과를 기대할 수 있다. 본 논문에서는 다양한 재배환경에서 재배한 고추 및 대파의 정식일수별 전체 건중량을 기반으로 다양한 생장곡선(로지스틱(logistic), 곰페르츠(Gompertz), 리차드(Richards), 이중 로지스틱(double logistic curve)을 활용한 비선형 모형 기반 작물 생육 모형을 적합하고, 작물 성장률에 기반한 비료시비량 분배 알고리즘을 제안하고자 한다.

• Nutrition Research and Practice
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• 제4권6호
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• pp.449-454
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• 2010

Recent economic changes throughout the world, either development or crises and recessions, have prompted a host of nutrition related problems, including a decreased prevalence of undernutrition, an increase in the prevalence of diet related diseases, widespread food insecurity as crop prices increase, and so on. In addition, evidence is mounting that suggests that exposure to poor nutrition early in life is a predisposing factor for chronic diseases in adulthood. Thus, the role of international or community nutrition professionals is vital to not only studying and understanding the interplay between economics, food policy, and health, but also to improving the ability to intervene and prevent many problems related to food insecurity in developed and developing countries. The purpose of this review is to outline and describe these issues as a means to open discussion on how to best alleviate major nutrition problems in the world.

• Journal of Nutrition and Health
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• 제38권9호
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• pp.777-785
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• 2005

Health outcomes are strongly associated with dietary factors. Poor dietary intake increases health risks and can have adverse affects throughout all stages of live and can be passed onto next generations. Korea faces a double burden of nutritional problems. One one side health problems are related to an inadequate diet including underweight, osteoporosis or anemia etc. On the other side the health problems are related to over consumption, including obesity, hypertension, diabetes, cancer, cardiovascular disease and etc. Improving the national health and nutritional status requires adjustments of nutrition policies that have primarily focused on under nutrition, to accommodate all nutrition concerns within the country. Nutrition research specific to Korean people must be promoted to produce scientific evidences on which to base nutrition policies. The creation of a nutrition-specialized institute is an important starting point.