• Proceedings of the KIPE Conference
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• 전력전자학회 2020년도 전력전자학술대회
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• pp.286-287
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• 2020

본 논문은 단상 전기철도 시스템의 불평형 부하 특성으로 인한 3상 계통의 전력 불평형을 보상하기 위해 백투백 컨버터를 적용하였으며, 실험을 통해 전력 불평형 성능 개선 특성을 검증하였다. 3상 전압은 스코트 변압기를 통해 2개의 M-T상 전압으로 출력되며, 전력 불평형 개선을 위해 적용된 백투백 컨버터는 DC 링크를 공유하며 각각 M-T상에 연계된다. 백투백 컨버터는 M-T상에 연계된 부하용량 차이에 따른 불평형 조건에 관계없이 M상과 T상 계통 라인에 동일한 전력이 공급되도록 제어하는 역할을 수행하며, 제어 알고리즘은 동기좌표계에서 구현하였다. 백투백 컨버터의 프로토 타입은 3레벨 NPC 컨버터로 설계하였으며, M상 5kW, T상 1kW 부하에서 전력보상 장치가 동작하고 있음에도 완전히 해결되지 않은 불평형 현상에 대해 분석한다.

• Journal of the Korean Society of Food Science and Nutrition
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• 제36권11호
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• pp.1377-1384
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• 2007

A previous study suggested that the phyto-extract mixture (PEM381) containing Camellia sinensis (leaf), Psidium guajava (leaf), and Rosa hybrida (flower) inhibited not only arachidonic acid cascade-related enzymes (5-lipoxygenase and cyclooxygenase) in vitro but also degranulation and histamine release from rat peritoneal mast cells. In this study, the same PEM381 was used to investigate its inhibitory effects on the syntheses of leukotrienes and prostaglandins as well as on serum concentration of histamine and eosinophils infiltration in type I allergic reaction-induced mice. The PEM381 could decrease concentrations of serum cysteinyl leukotrienes from mice activated by anti-DNP IgE and DNP-albumin. The concentration of serum histamine by oral administration of PEM381 (25, 50, and 100 mg/kg of body weight) in type I allergic reaction-induced mice was $395.93{\pm}190.37$ nM, $315.59{\pm}164.23$ nM, and $325.07{\pm}112.02$ nM, respectively, while that of positive control (promethazine hydrochloride 10 mg/kg of body weight) was $270.12{\pm}24.02$ nM. In addition, the PEM381 also showed inhibitory effect on the eosinophils infiltration in the nasal mucosa of mice which were sensitized with ovalbumin. However, the effect of PEM381 on the syntheses of prostaglandins seemed to be insignificant. Consequently, these results suggest that PEM381 may be useful for the prevention and treatment of type I allergy-related diseases.

• Korean Journal of Plant Resources
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• 제30권5호
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• pp.565-570
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• 2017

In a plumcot 'Harmony' cultivar, which is an interspecific hybrid between plum and apricot, canopy occupation and productivity according to tree training system, Y shape with no trellis (YNT) and Y-palmette with trellis (YPT), were compared. According to the survey results for 5 years of planting, tree growth was similar in two training systems. However, canopy occupation and fruit yield of YPT were significantly higher than those of YNT. The fruit weight and sugar content were not significantly different between two systems. The fruit drop rate tended to be lower in YPT than in YNT. From the above results, it is expected that the YPT type will contribute to the increase of canopy occupation and fruit yield and reducing the fruit drop rate compared to the YNT.

• Nuclear Engineering and Technology
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• 제23권4호
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• pp.444-455
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• 1991

An accurate and fast running NEDAR model for calculating radial power profile throughout fuel life in both solid and annular pellets for existing and advanced CANDU-PHWR-fuel was developed in this work. This model contains resultant flux depression equations and neutron depression data tables which have been developed for CANDU-PHWR fuel of pellet with the diameter 8.0 to 19.5 mm and enrichment 0.71-6.0 wt % U-235, over a bumup range of 0 to 840 MWh /kgU (35000 MWD/T). In order to obtain the neutron flux distribution in the fuel pellet, the CE-HAMMER physics code was run for a neutron flux spectrum appropriate to a CANDU-PHWR to give predictions of radial power profile for several ranges of fuel design parameters. The results, which were calculated by the CE-HAMMER physics code, were fitted to an equation which is solved in terms of Bessel and exponential functions in order to obtain the parameters, $textsc{k}$, $\beta$ and λ in the resultant equation. The present NEDAR model produce a radial profile which, when normalized to unity at the pellet surface, is slightly higher than the profile of the original ELESIM data table. The predictions of the fission gas release by KAFEPA-NEDAR are in slightly better agreement with the experiments than those of ELESIM. The NEDAR model described in this study has been shown to provide an effective, reliable, and accurate method for determining radial power profiles in CANDU-PHWR fuel rods without incurring a significant increase in computing time.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• 제28권4호
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• pp.144-153
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• 2010

In making gardens, garden designers establish a principle using specific colors, collect materials, and combine them with their own aesthetic senses. This study is design mothed through the species and characteristics of flowering plants used in the Barrington court created by Gertrude Jekyll and Sissinghurst's white garden created by Vita Sackville-West, both of which are the most renowned gardens that used the white color. The analysis of each individual plant used in the gardens will be based on the season, colors, shapes, plant heights and aromaticity. Through their gardens, how the flowering plants aesthetically united with each other in creating the white gardens will be reviewed. To represent the freshness of spring, Jekyll planted Campanula spp. and Lilium spp. in the garden. Vita Sackvill-West aims at the moonlight in a summer night and features Delphinium spp., Rosa mulliganii, and R. longicuspis. The color of the flowers is in white, varying from pure white, ivory and silver. To prevent monotony due to monocolor flowers, the forms of the flowers are intense. To make white flowers look better, the colors of leaves include light green, light gray and bright and greenish yellow. Overall, cool colors are used to give a mystique, coolness, cleanness and to produce an fascinating and plaintive atmosphere, getting joined with white flowers and reflected light in the night. The White Garden has made significance in the history of landscape architecture: it was the starting point of garden design through theme colors, based on the idea and technology of planting design methods that discover the potential of colors and withdraw limits. And it also made a significant contribution to the advancement of garden art with combinations by aesthetic principles.

• Proceedings of the Plant Resources Society of Korea Conference
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• 한국자원식물학회 2019년도 춘계학술대회
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• pp.86-86
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• 2019

현삼과(Scrophulariaceae)에 속하는 긴산꼬리풀(Veronica longifolia L.)은 벽자색의 긴 꽃이 총상화서로 달려 청량감을 자아내어 분화소재로 이용한다면 단조로운 실내의 분위기를 환기할 수 있다. 따라서, 조경 및 관상용 식재에 용이한 긴산꼬리풀의 재배는 2018년 5월 15일에 파종하여 생산된 유묘를 2018년 7월 16일에 정식하여 2018년 10월 15일까지 수행하였다. 기비실험은 코트비료(싱싱코트)를 포트당 0, 10 및 20알 처리하였다. 추비는 hyponex (N-P-K, 4-6-6)를 4주 간격으로 총 3회 각 0, 1000 및 $2000mg{\cdot}L-1$로 엽면시비 하였다. 광량 실험은 무차광, 55 및 75% 차광막을 설치하여 수행하였다. 왜화제 종류 및 농도 실험은 dinizonazole(빈나리)과 daminozide (B-9)를 각 0, 1000 및 $2000mg{\cdot}L-1$ 농도로 처리하였으며, 적심처리는 4주차에 1회 처리 유무를 달리하였다. 모든 실험의 공통사항은 플라스틱 10호 화분에 원예상토를 충진한 후 200구 트레이에 종자를 셀당 4립씩 파종하여 생산된 유묘를 정식하였다. 연구의 결과, 기비처리는 초장, 마디수, 엽수가 증가하고, 절간장 및 측지수를 감소시켰으나, 유의적인 차이는 나타나지 않았다. 추비 처리는 농도가 높을수록 엽수가 증가하는 경향을 보였으며, $2000mg{\cdot}L-1$에서 무처리에 비해 유의적으로 많았다. 차광정도에 따른 긴산꼬리풀의 생육은 무차광 조건에서 생육이 가장 양호하였다. 차광률이 증가할수록 전반적인 생육이 억제되고, 개화율도 크게 감소하는 결과를 보였다. 왜화제 처리별로는 종류에 관계없이 전반적인 생육이 억제 되었다. Diniconazole 및 daminozide의 농도가 높을수록 초장이 억제되는 경향을 보였으나, 측지수, 마디수, 엽수도 감소하여 관상적 이용에 적합하지 않다. 적심을 할 경우 전반적인 생육은 큰 차이가 나타나지 않았으며, 측지수가 감소하였다. 따라서, 긴산꼬리풀의 분화생산을 위한 재배기술은 기비는 처리하지 않고, 추비는 $2000mg{\cdot}L-1$로 시비하며, 광이 충분한 곳에서 재배하는 것이 효과적이다. 또한, 왜화제와 적심은 일반적으로 줄기신장을 억제하고 마디수와 엽수를 증가시켜 관상적 이용효과가 있는 것으로 알려져 있지만 본 연구에서는 반대의 결과를 보여 처리 하지 않는 것이 효과적인 것으로 판단된다.

• Journal of the Korean Institute of Gas
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• 제22권6호
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• pp.123-128
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• 2018

MDF was treated on the surface of MDF with fire retardant lacquer, water-soluble flame retardant coat and water-soluble wood cover on the MDF wood, and the pyrolysis characteristics and the atmospheric noxious gas generation characteristics were investigated by using the large capacity thermal analyzer. As a result of investigating pyrolysis and combustion gas generation characteristics after treatment of 0.11 / 11.55 g in terms of mass ratio, it was found that combustion starting time was slightly longer than that of pure MDF in the case of treatment with fire retardant lacquer. The combustion temperature was increased from $340^{\circ}C$ to $450^{\circ}C$. The pyrolysis and combustion gas generation characteristics of the MDF wood treated with the aqueous flame retardant coat showed the changes in combustion starting time and temperature from $260^{\circ}C$ to $542^{\circ}C$ for about 26 minutes at the mass ratio of 0.13 / 11g. Also, when the commercially available waterproof wood cover was treated with 0.13 / 11.55 g of MDF, the sudden weight change tended to increase from $300^{\circ}C$ to $370^{\circ}C$ and showed a second change at approximately $500^{\circ}C$.

• Journal of Korea Entertainment Industry Association
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• 제15권4호
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• pp.89-100
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• 2021

Comedy has been popular since ancient Greece. In order to visualize comedy more effectively, the actor's acting acts as an important factor. Then active discussion is needed on how actors can actually shape their comedic performance. I would like to approach comedic acting methods, focusing on the character of Kim Seo-young in the play . This researcher played the character of Kim Mi-young, and the characteristics of comedic acting include exaggeration, repetition, fast tempo, changing tone, and exaggerated physical behavior. Comedic acting comes from a dissonance of reactions. This is because unexpected reactions to stimuli can cause audience laughter. Comedic acting is also important in exaggeration and repetition, which must be based on true acting. The fast tempo of the act and the changing tone of the words also affect comedic acting expressions, and the embodiments of 'slapstick' and 'group dance', which are characteristics of farce acting, play an important role in causing audience laughter. In order for these characteristic elements to show comic effects, the actor's true acting must be the basis. What is important in comedic acting is understanding the narrative flow and features of the text and expressing it accurately. Comedic effects can be sufficiently represented if an actor truly expresses his means and faithfully demonstrates what the text requires. It is hoped that such research will help explore various acting arts, the acting education field, and the theater creation process.

• Transactions of the Korean Society of Automotive Engineers
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• 제19권1호
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• pp.32-37
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• 2011

In car refinishing, the paint film characteristics of clear coat play an important role in appearance quality. Thus, Primarily in this research, the variance of brightness with the change of the thickness of paint film is investigated. Besides, as changing the thickness of paint film, the correlation between surface leveling(which is one of appearance characteristics) is investigated in this research. Throughout this investigation, we come to know that the increase of clear coat paint film thickness leads the improvement of appearance characteristics within specific range of thickness. Furthermore, the fact that too thick paint film does not increase the brightness or appearance characteristic any more is known. The optimum thickness of clear coat film for the best and appearance characteristics is derived from this research and more efficient way of determining optimum thickness of paint film is found. Particularly, haze value and waviness have more influence on vividness than brightness. Throughout all experiments, the appearance characteristics are much better at painted horizontally than vertically. These results are derived due to the facts that to obtain the same paint film thickness at painted vertically with painted horizontally is difficult and the way of vertical painting is different from horizontal painting. Therefore, the improvement of vertical painting and horizontal painting are required.

• Culinary science and hospitality research
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• 제13권1호
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• pp.1-10
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• 2007

Co-branding of food courts is turning into a trend with the activation of recent entrance of famous restaurants into shopping departments and other large-size buildings. This research analyzes the effects of co-brand food courts on the choices of dining enterprises by dealing with the customers of these newly activated food courts in shopping malls and large-size buildings. By analyzing the effects of the present status of customers' using food courts according to the characteristics of their choices of dining enterprises, food and brand elements were found to have an effect on the restaurant brand recognition of food courts, and price factor was found to have an effect on an visitors' recommendation intension. Therefore, customers who set importance on food and brand elements tend to take the brand of food courts into consideration as well; therefore, the maintenance of food quality and strengthening of brand image are mandatory in case of food court operation.