• Journal of Electrical Engineering and Technology
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• 제8권1호
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• pp.53-63
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• 2013

To guide the decision making of the expert engineer specialized in power system operation and control; the practical OPF solution should take in consideration the critical situation due to severe loading conditions and fault in power system. Differential Evolution (DE) is one of the best Evolutionary Algorithms (EA) to solve real valued optimization problems. This paper presents simple Differential Evolution (DE) Optimization algorithm to solving multi objective optimal power flow (OPF) in the power system with shunt FACTS devices considering voltage deviation, power losses, and power flow branch. The proposed approach is examined and tested on the standard IEEE-30Bus power system test with different objective functions at critical situations. In addition, the non smooth cost function due to the effect of valve point has been considered within the second practical network test (13 generating units). The simulation results are compared with those by the other recent techniques. From the different case studies, it is observed that the results demonstrate the potential of the proposed approach and show clearly its effectiveness to solve practical OPF under contingent operation states.

• 운동영양학회지
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• 제24권3호
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• pp.39-43
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• 2020

[Purpose] In this literature review we aimed to investigate the effects of curcumin supplementation on delayed onset muscle soreness (DOMS), which occurs after exercise, and evaluate related parameters to propose practical recommendations for the field of exercise physiology. [Methods] Experimental studies conducted on curcumin supplementation and DOMS were systematically reviewed to determine (1) the effect of curcumin supplementation on DOMS, (2) potential mechanisms by which curcumin supplementation may attenuate DOMS, and (3) practical considerations for curcumin supplementation. [Results] While several studies have reported that curcumin supplementation attenuates DOMS after exercise, others have reported that curcumin supplementation has no effect on DOMS. Several mechanisms have been proposed by which curcumin supplementation may attenuate DOMS; the most probable of which is a reduction in inflammatory response. Other potential mechanisms include modulation of transient receptor potential vanilloid 1 (TRPV1) or changes in post-exercise capillary lactate levels; these require further examination. The usual recommended dose of curcumin is 150-1500 mg daily (sometimes up to 5 g), divided into 2-3 portions and taken before and after exercise. It is not necessary to take curcumin together with piperine. [Conclusion] Although conflicting results regarding the effects of curcumin supplementation on DOMS exist in literature, it may be considered as a method of nutritional intervention for reducing post-exercise DOMS.

• 대한약침학회지
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• 제12권1호
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• pp.43-51
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• 2009

Objective : The purpose of this study is to present the standard for practical application of ginger herbal pharmacopuncture Material and Methods : We refer to ancient literatures and the recent papers for ginger. Conclusions : The following results have been obtained 1. The effect of ginger(Zingiber officinale Roscoe) is to "release exterior", "balance nutrient & defensive qi", "resolve phlegm", "arrest coughing", "warm the lungs". So ginger herbal pharmacopuncture can be applied to treating fever, chilling sign, headchae, snuffle and gasping cough due to cold affection and treating the symptoms like sputum and asthma that be revealed by pulmonary disease. 2. The effect of ginger is to "warm spleen and stomach", "arrest vomiting" "promote normal flow of water". So ginger herbal pharmacopuncture can be applied to treating nausea, vomiting, abdominal distension and diarrhea due to phlegm & dampness and treating edema. 3. The effect of ginger is to eliminate blood stasis. So ginger herbal pharmacopuncture can be applied to treating contusion, blood stasis, sprain and gynecologic disease. 4. Ginger can treat myalgia and pain due to wind-damp and have anti-inflammatory effect in pharmacology. So ginger herbal pharmacopuncture can be applied to treating disease of joint, ligament and muscle. 5. Ginger can resolve phlegm and resuscitate. So ginger herbal pharmacopuncture can be applied to treating unconsciousness. But, treating incipient cardiovascular accident, it needs to call your special attention to the danger of blood pressure increase. 6. In pharmacology, ginger is effective for antitumor, antioxidant effects and activating immunocyte. So ginger herbal pharmacopuncture can be applied to treating broadly varieties of tumor and allergic disease.

• 대한전기학회논문지
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• 제39권12호
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• pp.1281-1287
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• 1990

A new thermal power plant feed-water system model, which is based on Astrom, is presented. Astrom's model has some difficulties in applying to practical systems because it is not able to measure the heat and energy transfer loss. Hence, in order to make up for these difficulties, the Gas State Equation is added to the model. Computer simulations are performed to show the validity of the new model at thermal power plant with practical boiler operating data and to verify the L.Q. controller effect on boiler drum level system.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1990년도 봄 학술발표회 논문집
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• pp.16-19
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• 1990

The effect of superplasticizers on the fluidity performance in fresh concrete and physical properties in hardened concrete have been analyzed and investigated under mix proportions of water cement ratio of 0.4, 0.6, crushed stone aggregates, and addition rates of superplasticizers of 0.0, 0.5, 1.0 and 1.5 in the practical range. It is the aim of this study to provide the fundamental data on the workability improvement and engineering properties of crushed stone concrete using superplasticizers comparing with conventional concrete for the practical use and research data accumulation of superplastized concrete.

• 한국문헌정보학회지
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• 제51권2호
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• pp.133-156
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• 2017

본 연구는 문헌정보학 현장실습 전반에 대해 실습지도자의 인식을 진단하여 문헌정보학 현장실습의 유용성 및 효과성을 제고할 수 있는 운영방안을 모색하고자 한다. 이를 위해 현장실습기관 실습지도자에 대한 설문조사를 통해 현장실습에 대한 현황조사 및 인식도 측정을 실시하여, 인식도에 영향을 미치는 요인들을 분석하고 그 영향관계를 고찰하였다. 실습지도자의 일반적 특성, 도서관 관련 업무 특성, 실습기관의 현장실습 현황 등 요인 중에서 현장실습 인식도에 영향을 미치는 요인들을 조사한 결과, '현장실습 운영 책무성'이 유의한 영향을 끼치는 요인으로 나타났다. 그리고 현장실습 인식도를 구성하는 6가지 구성요인별로 실습지도자의 전반적 현장실습 인식도에 미치는 영향관계는 어떠한지 분석한 결과, '실습환경', '실습 지도방법' 요인이 유의한 영향을 끼치는 것으로 파악되었다.

• 디지털융복합연구
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• 제20권5호
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• pp.819-825
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• 2022

전문 직업인으로서 자질과 실력을 검증하기 위한 미용사 국가기술 자격증의 중요성이 증가하는 가운데 헤어 실기과제에 대하여 헤어디자이너가 지각하는 직무 태도 연구를 통해 성취동기와 직무 태도 향상이 필요한 시점이다. 이에 헤어살롱에서 근무하는 헤어디자이너의 직무 태도에 미치는 영향을 연구한 결과 미용사 헤어 국가기술 자격증 실기과제 중 블로우 드라이는 헤어디자이너의 직무 효능감을 유발하는 것으로 나타났고, 두피 스켈링과 샴푸는 헤어디자이너의 직무만족도를 유발하는 것으로 나타났다. 연구 결과를 바탕으로 가발에만 국한되는 비현실적 실기기법이 아닌 미용산업체에서 고객에게 다양한 기법으로 유용하게 적용할 수 있는 실용성을 가미한 자격증 실기과제에 대한 다양한 제시가 가능해지며, 체계적인 교육과 헤어디자이너의 직무 태도 향상을 유도하고자 한다. 더불어 본 연구는 헤어디자이너의 성취동기 향상을 위한 다양한 실기과제 개발의 기초자료를 제공하리라 사료한다.

• 식품보건융합연구
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• 제7권4호
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• pp.1-11
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• 2021

The purpose of this study is to investigate the ramen selection attributes of consumers. This research assigned taste, price, quantity, design, and brand as selection attributes, all of which have already been verified by previous studies as selection attributes when purchasing processed foods. A total of 500 questionnaires were issued, and the survey results were analysed to ensure validity and reliability. A Structural Equation Model was used to test the hypotheses of the study. Based on the analysis, taste, price, quantity, design, and brand had a statistically significant effect on satisfaction. Furthermore, satisfaction had a statistically significant effect on repurchase intention. Among the selection attributes (taste, price, quantity, design, and brand), only price had a statistically significant effect on repurchase intention. However, the influence of the selection attributes on satisfaction varied depending on the consumer's consumption value. In order to analyse the moderating effect of consumption value, the respondent group was divided into a hedonism group and pragmatism group, and analysed. It empirically proved that the hedonistic value-oriented group valued taste, and the practical value-oriented group valued price the most. This study empirically verified the relationship between ramen selection attributes and consumption value, and provided corresponding theoretical and practical implications.

• 한국병원경영학회지
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• 제27권1호
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• pp.43-57
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• 2022

Background: Avoidable mortality rate has been widely used as an indicator of the quality of health care and the degree of inequality in health levels. The purpose of this study was to identify the factors affecting the avoidable mortality rate in the region. Methods: The data was MDIS(Microdata Integrated Service) Causes of Death Statistics, and the analysis period was from 2010 to 2019. Panel analysis was performed to identify the influencing factors on the avoidable mortality rate. Findings: Result showed that the current smoking rate had a significant positive effects on the avoidable mortality rate of both men and women. And the smoking cessation trial rate, low salt diet rate, weight control trial rate, annual vaccination rate had a significant negative effect. In the social environment, the divorce rate had a significant positive effect. In the economy environment, financial independence and social welfare budget rate had a significant negative effect. In the physical environment, the factory area rate had a significant positive effect. Practical Implication: Practical implication in order to lower the local avoidable mortality rate, various social determinants of health as well as health care resources should be considered together.

• 한국가정과교육학회지
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• 제22권2호
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• pp.61-79
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• 2010

본 연구는 현장에서 '생애설계와 진로탐색' 단원의 효과적인 수업을 위한 기초자료를 제공하고 도서관을 활용한 실천적 문제 중심 학습의 활용 가능성을 제시하는데 목적을 두고 설계되었다. 제7차 교육과정 고등학교 10학년 12종 교과서의 '생활설계' 단원과, 2007 개정 교육과정 해설서의 9학년 '생애설계와 진로탐색' 단원에 대한 내용을 분석한 결과를 바탕으로 실천적 문제를 정의하고 '생애설계와 진로탐색' 단원의 내용을 재구성하여 10차시의 학교도서관을 활용한 실천적 문제중심 가정과 교수-학습 과정안을 개발하였다. 경기도 S고등학교의 재학생 139명을 대상으로 실험집단에는 개발된 학교도서관을 활용한 문제중심 수업을 도서관에서, 비교집단에는 동일주제를 가지고 교실에서 수업을 진행한 후 '생애설계와 진로탐색' 단원에 대한 의식 및 태도와 가정과에 대한 인식의 향상정도를 공변량 분석(ANCOVA)으로 알아보고, 학생의 수업방법에 대한 만족도를 살펴보았다. 연구결과, 개발된 도서관을 활용한 실천적 문제중심 수업은 교실에서의 실천적 문제중심 수업보다 '생애설계와 진로탐색'과 관련된 바람직한 의식과 태도를 형성하고 발전시키는데 크게 영향을 미치는 것으로 나타났다. 또한, 가정교과를, 과학지식을 가정생활에 응용하는 능력을 기르는 교과, 가정과 연결된 사회문제 분석 능력을 기르는 교과, 주변사람들을 돌보고 존중하는 능력을 기르는 교과, 현대사회에서 중요한 교과라고 긍정적으로 인식하게 하는데 영향을 미치고 있었으며, 수업방법과 수업 전반에 대한 학생들의 만족도가 매우 높은 것으로 나타났다.