• KIEAE Journal
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• 제7권4호
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• pp.147-152
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• 2007

Numerous non-destructive tests(NDT) to assess the safety of real structures have been developed. System identification(SI) techniques using dynamic responses and behaviors of structural systems become an outstanding issue of researchers. However the conventional SI techniques are identified to be non-practical to the complex and tall buildings, due to limitation of the availability of an accurate data that is magnitude or location of external loads. In most SI approaches, the information on input loading and output responses must be known. In many cases, measuring the input information may take most of the resources, and it is very difficult to accurately measure the input information during actual vibrations of practical importance, e.g., earthquakes, winds, micro seismic tremors, and mechanical vibration. However, the desirability and application potential of SI to real structures could be highly improved if an algorithm is available that can estimate structural parameters based on the response data alone without the input information. Thus a technique to estimate structural properties of building without input measurement data and using limited response is essential in structural health monitoring. In this study, shaking table tests on three-story plane frame steel structures were performed. Out-put only model analysis on the measured data was performed, and the dynamic properties were inverse analyzed using least square method in time domain. In results damage detection was performed in each member level, which was performed at story level in conventional SI techniques of frequency domain.

• 한국식품영양과학회지
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• 제38권1호
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• pp.116-120
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• 2009

포도즙의 알코올 발효 시 당 농도와 교반속도, 발효시간이 알코올함량과 총산도에 미치는 영향을 알아보기 위해 반응 표면분석을 이용하여 알코올발효 조건을 최적화하였다. 알코올함량은 10%, 총산도는 최소화되는 것을 목적으로 하여 알코올 발효조건을 최적화한 결과 $19.98^{\circ}Bx$로 농축한 국내산 Campbell early 포도즙에 효모를 접종시킨 후 교반속도 104.1 rpm으로 89.67시간 동안 발효시켰을 때 목적값에 가장 근접한 결과를 나타내었다. 알코올 발효 시 포도즙의 당도가 증가할수록 알코올함량과 총산도는 증가하는 경향을 나타내었고, 교반속도는 알코올함량과 총산도에 큰 영향을 주지 않는 것으로 나타났다. 또한 발효시간이 길어질수록 알코올 함량과 총산도가 증가하는 경향을 나타내었다.

• 대한토목학회논문집
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• 제13권5호
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• pp.19-27
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• 1993

파괴역학에서 최근의 연구들은 균열체의 강도를 해석함에 있어서 균열선단 주위의 탄성 에너지 해방용, 균열확장력 그리고 응력장의 특성 등에 대한 지식을 요구하고 있다. 이런 연구들의 주안점은 에너지율, 응력장 그리고 탄성이방성체의 여러가지 경우들을 설명하는 데 있다. 철근콘크리트, 목재, 박층구조 그리고 각각의 방향으로 성질을 가지는 탄성체들은 대부분 직교이방성이다. 본 연구에서는 균열선단에 특이요소를 사용하고 균열선단 부근에서 아주 세밀한 요소를 사용하여 직교이방성 탄성체의 응력확대계수를 결정 하였다. 본 연구에서 응력확대계수를 구하기 위해 변위상관법을 사용하였으며 타 논문의 결과와 잘 일치함을 알 수 있었다.

• Nuclear Engineering and Technology
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• 제28권2호
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• pp.185-196
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• 1996

이 연구의 목적은 원자력발전소 페라이트 배관에 존재하는 원주방향 표면균열을 평가하는데 사용되는 ASME Code Z-Factor를 수정하는데 있다. ASME Code Z-Factor는 소성하중을 탄소성하중으로 보정하는 하중 보정 계수로서, 현재 사용되는 ASME Code Z-Factor는 최대하중을 과소평가하는 문제점이 있다. 이 연구에서는 먼저 기존의 SC. TNP방법이 수정되었으며, 그 이유는 기존의 SC. TNP 방법으로 예측된 최대허용하중이 실험에서 측정된 방법보다 약간 큰 결과를 주는 문제가 있기 때문이다. 이 수정된 SC. TNP 방법을 사용하여 페라이트 배관에 대한 새로운 Z-Factor를 개발하였다. 수정된 SC. TNP 방법의 타당성 과 새로 개발된 Z-Factor의 타당성을 원주방향 표면균열을 갖는 배관에 대한 실험 결과를 통해 조사하였다. 평 가결과는 수정된 SC. TNP 방법은 페라이트 및 오스테나이트 배관의 원주 방향 표면균열의 거동을 잘 예측할 수 있음을 보여 주며, 또한 수정된 SC. TNP 방법으로 구한 새로운 Z-Factor는 페라이트 배관에 존재하는 원주방향 표면균열의 거동을 잘 예측할 수 있음을 보여준다.

• 한국식품조리과학회지
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• 제30권4호
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• pp.454-462
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• 2014

This study aimed at the optimization and development of rice snack by response surface methodology (RSM). The effect of rice soaking time and additional ratio of soybean milk on physicochemical properties and sensory evaluation of dried rice flour for non-fried snack was studied. After soaking for 0 to 12 days, Baekjinju rice was milled and then air-dried. A quadratic model was selected for weight, volume, hardness, taste and appearance. Two-factor interaction model was selected for expansibility, color and overall preference. A linear model was selected for yellowness and flavor. Weight, hardness and appearance were increased and decreased thereafter as rice soaking time increased, but the volume was reversed. Expansibility, color, taste and flavor were decreased as rice soaking time increased, but yellowness was reversed. Weight and overall preference decreased as additional ratio of soybean milk increased, but volume, expansibility and yellowness were reversed. Hardness, taste and appearance were increased after initial decrease as additional ratio of soybean milk increased, color and flavor were not changed by additional ratio of soybean milk. The optimum conditions of each factor were set to where the rice soaking time and additional ratio of soybean milk were at their minimum. Weight, volume, expansibility, yellowness, hardness, color, taste, flavor, appearance and overall preference were established at maximum level where the objective of the optimum was in level. Our data indicated the statistically predicted values of the highest desirability was 1.24 day of rice soaking time and 15.80% of additional ratio of soybean milk.

• 한국산학기술학회논문지
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• 제16권10호
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• pp.6647-6654
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• 2015

본 연구는 응급구조학과 학생대상 한국판 시뮬레이션 경험 만족도 측정도구 분석을 목적으로 응급구조학과 학생 총 111명을 대상으로 ACLS시뮬레이션 실습교육 후 학생들이 느끼는 만족도를 측정 후 분석하였다. 또한 시뮬레이션 교육에 대한 호감도, 필요성, 전문심장소생술 이론 성적이 시뮬레이션 실습교육 만족도에 미치는 영향 및 상관관계를 확인하고자 한다. 측정된 만족도는 일원배치분산분석을 통하여 분석하였으며, 그 결과 대부분의 학생들이 높은 만족도를 나타냈다. 시뮬레이션 교육에 대한 호감도 및 필요도가 높을수록 만족도 측정도구의 세 가지 요인 모두에서 높게 나타났으나, ACLS이론 성적과 만족도의 상관관계는 성립되지 않았다. 향후 ACSL 시뮬레이션을 통한 교육법은 유지되어야 하며 지속적으로 발전해야 한다.

• 한국식품조리과학회지
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• 제32권6호
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• pp.704-715
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• 2016

Purpose: This study was conducted to optimize the conditions of manufacturing the wet noodle added with Aloe powder. Methods: The I-optimal design of response surface methodology (RSM) was used for the optimization of added amount of Aloe powder, water content, and kneading time as the independent variables. The quality characteristics (color, texture, water absorption ratio, volume, turbidity) and sensory characteristics (color, flavor, taste, mouth feel, overall acceptance) were analyzed as dependent variables. Results: The lightness, redness, and yellowness of the Aloe noodle were all lowered with the addition of Aloe powder. All texture characteristics such as hardness, elasticity and chewiness of Aloe noodle showed the tendency to increase with increasing amount of Aloe added and kneading time. The water uptake and the volume expansion tended to increase with increasing aloe addition and water addition. As the kneading time increased, the dissolution of solids decreased and the turbidity tended to decrease. Aloe powder content influenced the color, flavor and taste of the noodles most among independent variables, and the mouthfeel of the noodle influenced by the water addition and the kneading time. Conclusion: Aloe noodle showed the best desirability with 3.03% of Aloe powder, 43.56% of water content and 13.06 min of kneading time by RSM analysis. Aloe noodles prepared under these optimized conditions are expected to be able to manufacture and utilize functional Aloe noodles by meeting the content of isobarbaloin, which helps the intestinal functional activity.

• Applied Biological Chemistry
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• 제40권3호
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• pp.225-231
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• 1997

임의로 선정되어진 국산두부콩과 수입두부콩들의 물성 및 색도에 대한 최적화이론을 적용하였다. 제조한 두부의 파손강도와 응력완화현상은 rheometer를 사용하여 측정하였으며, 색도는 colorimeter를 이용하였다. 각 두부콩들의 효과는 수식화된 non-linear canonical regression mpdel로 표현하였으며 각 콩들의 기여도는 trace plot으로 나타내었다. 국산콩은 그 첨가량이 증가할수록 두부의 파손강도는 다른 수입콩보다 우월하게 나타나 두부조직의 강도에는 뛰어남을 보여주었으나 두부조직의 점탄성에 있어서는 약간 뒤떨어짐을 보여주었으며 색감에서는 크게 뒤지는 것으로 나타나서 선정된 물성반응에 대하여 선별적인 경쟁력을 가짐을 보여주었다. 그러나 국산콩의 흡습능력은 수율에 결과적으로 영향을 주며 이를 새로운 반응치로 최적화이론에 적용하였고 그 결과 가격경쟁과 반응에 대한 취약점을 보완하여 최적화된 결과에 기여함을 보여주었다. 이와같은 국산두부콩과 수입두부콩의 최적화된 배합비율은 수율과 가격이라는 두 양립되는 목적함수로써 발산함을 보여 주었으며 이를 수렴시키기 위하여서는 가증치도입과 국산콩의 흡습능력조절에 대한 가공공정의 새로운 연구가 필요하며 이에 대한 조절이 품질향상에 기여할 수 있음을 보여 주었다.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 춘계 학술대회
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• pp.56-66
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• 2005

In response to the increasing emphasis being placed on the importance of international cooperation as part of global efforts to cope with growing non proliferation, and security, concerns in the nuclear field, the Director General of the International Atomic Energy Agency (IAEA), Mohamed ElBaradei, appointed an international group of experts to consider possible multilateral approaches to the nuclear fuel cycle. The mandate of the Expert Group was three fold: ${\bullet}$ To identify and provide an analysis of issues and options relevant to multilateral approaches to the front and back ends of the nuclear fuel cycle; ${\bullet}$ To provide an overview of the policy, legal, security, economic, institutional and technological incentives and disincentives for cooperation in multilateral arrangements for the front and back ends of the nuclear fuel cycle; and ${\bullet}$ To provide a brief review of the historical and current experiences and analyses relating to multilateral fuel cycle arrangements relevant to the work of the Expert Group. The overall purpose was to assess MNAs in the framework of a double objective: strengthening the international nuclear non proliferation regime and making the peaceful uses of nuclear energy more economical and attractive. The Group identifies options for MNAs - options in terms of policy, institutional and legal factors - for those parts of the nuclear fuel cycle of greatest sensitivity from the point of view of proliferation risk. It also reflects the Groups deliberations on the corresponding benefits and disadvantages (pros and cons) of the various options and approaches. Although the Expert Group was able to agree to forward the resulting report to the Director General, it is important to note that the report does not reflect agreement by all of the experts on any of the options, nor a consensus assessment of their respective value. It is intended only to present options for MNAs, and to reflect on the range of considerations which could impact on the desirability and feasibility of those options.

• 한국의류학회지
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• 제41권4호
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• pp.575-584
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• 2017

Previous research has investigated the influence of explicit self-esteem and depression. These studies did not examine the implicit self-esteem and depression that exist in the internal unconscious of humans that are not influenced by prejudice and social desirability. This study identifies that fashion competency (FC) encourages the implicit self-esteem and relieves the implicit depression. Implicit self-esteem and depression were measured by Implicit Association Test (IAT) utilizing reaction; FC was surveyed based on questionnaires. The data collected were analyzed using factor analysis. FC was then composed of three factors of fashion involvement, fashion innovativeness and self-confidence in fashion coordination. The results of comparing the index values that indicate IA SE (implicit association self-esteem) and IA DE (implicit association depression) of each FC group indicated that a higher FC results in a higher IA SE and lower IA DE; therefore, individuals with a higher fashion competence have a higher implicit self-esteem and a sense of well-being. The findings support previous studies in that the FC tends to be positively related to quality of life in young people.