• 복식문화연구
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• 제7권5호
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• pp.152-164
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• 1999

As the latter part of the research on the high school girls\` body shapes, this study aimed to classify high school girls\` lateral body shapes and by combining the result with that of the authors\` precedent study on the classification of their frontal body shapes, to classify the whole body shapes into presentative clusters. Subjects consisted of 205 high school girls in Kwangju aged 16 through 18 years. 55 anthropometric and 29 photographic measurements were taken from each subject. For more effective data analysis, these measurements were tansformed into some calculated indexes. These indexes were reduced to 8 factors and these factors classified the lateral body shapes into 3 clusters. The compound types of the whole body shapes resulting from frontal and lateral body shape analysis resulted in 9 representative cody types.

• 복식
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• 제54권1호
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• pp.37-51
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• 2004

The purpose of this study is to measure middle-aged men's bodies around the ages of thirty-five through fifty-five, whose age-group undergoes drastic changes on their body shapes, and to reveal their physical characteristics by comparing the measurements. Sixty Body measurements were taken on 168 subjects. Statistics analysis of data used Oneway Anova, Correlation, Fator Analysis, Cluster Analysis, Crosstabs. Body shapes are grouped based on the measurements, and TypeI is characterized by small and middle-sized body shapes. Tall and obese body shapes belong to TypeII. Lastly, TypeIII is characterized by body shapes with very tall height and obesity, especially around the abdomen area.

• Nuclear Engineering and Technology
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• 제39권6호
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• pp.737-746
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• 2007

A spacer grid, which is one of the most important structural components in a PWR fuel assembly, supports its fuel rods laterally and vertically. Based on in-house design experience, scrutiny of the design features of advanced nuclear fuels and the patents of other spacer grids, KAERI has devised its own spacer grid shapes and acquired patents. In this study, a performance evaluation of KAERI's spacer grid shapes was carried out from mechanical/structural and thermohydraulic view points. A comparative performance evaluation of commercial spacer grid shapes was also carried out. The comparisons addressed the spring characteristics, fuel rod vibration characteristics, fretting wear resistance, impact strength characteristics, CHF enhancement, and the pressure drop level of the spacer grid shapes. The results show that the performances of KAERI's spacer grid shapes are as good as or better than those of the commercial spacer grid shapes.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.820-823
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• 1996

In contrast to parts of relatively simple shapes, it is important to match their cross-sectional shapes during mating parts of complicated shapes. It requires the 2.pi. information along their matching boundary to figure out their relative geometrical shapes. In this paper, we propose a method measuring a misalignment at the interface during mating parts with the complicated shapes by using the omnidirectional image sensing system(OLSSA). Also we carried out experiments in order to prove the method, and the results show the feasibility.

• ETRI Journal
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• 제32권4호
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• pp.630-633
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• 2010

In this letter, we propose a novel polygonal approximation of digital curves that preserve original shapes. The proposed method first detects break points, which have two different consecutive vectors, and sets an initial dominant point set. The approximation is then performed iteratively by deleting a dominant point using a novel distance, which can measure both the distance and the angle acuteness. The experimental results show that the proposed method can preserve original shapes and is appropriate for various shapes, including slab-sided shapes.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제24권4호
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• pp.233-246
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• 2021

도형 영역은 초등학생들의 학습에 많은 영향을 미치며, 다른 영역과도 밀접하게 관련되어 있다. 이에 본 연구는 평면도형에서 핵심적으로 지도해야 할 교수·학습 요소를 문헌에서 추출하였다. 또한 이를 활용하여 삼각형을 지도할 때 가르쳐야 하는 교수·학습 요소가 2015 개정 수학 교과서에 적절히 구현되었는지를 분석하였다. 분석 결과, 개념 알기의 경우 실제 물건의 모양에 초점을 두고 평면도형을 인식하는 활동이 부족하며, 기준에 따라 평면도형을 분류할 때 분류 기준이 이전 차시와 다르게 제시되는 것으로 나타났다. 개념 적용하기의 경우, 평면도형에 대해 토론하는 활동이 부족한 것으로 나타났다. 마지막으로 관계 알기의 경우, 2015 개정 수학과 교육과정에서 도형 사이의 관계는 다루지 않기 때문에 정의와 속성을 통해 도형 사이의 관계 파악하기, 분류 활동을 통해 도형 사이의 관계 파악하기, 도형 사이의 관계에 대해 토론하기의 전반적인 부분이 부족하게 제시되었다. 이와 같은 분석 결과를 바탕으로 삼각형의 지도 방향을 제시하고 삼각형에 관한 추후 교육과정 자료 개발에 시사점을 제공하고자 한다.

• 말소리와 음성과학
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• 제5권4호
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• pp.195-200
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• 2013

This study investigates formant transition shapes of Korean front vowels produced by native speakers of Seoul Korean. Sixteen speakers (eight male and eight female speakers) produced [pVt] syllables where the vowels were [i, e, ɛ]. F1, F2, and F3 transition shapes were estimated by presenting formant values at 11 points by dividing the vowel duration into 10 different time intervals. The results indicated that the male and female speakers overall demonstrated similar formant transition shapes and measurement points arriving at the maximum and minimum formant values for the three front vowels. As for the vowels [e] and [ɛ], both male and female speakers showed similar formant values across the 11 measurement points and similar measurement points arriving at the maximum and minimum values, indicating that the two Korean vowels have been merged not only in the steady-state formant values, but also in the dynamic transition shapes.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.52.3-52
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• 2002

Natural frequencies and mode shapes are two important modal data which specify the system. If the real system and FE model don't have the same local physical parameters, there will be a difference between modal data from real system and FE model. Because there is little difference in displacement mode shapes measured by an accelerometer, displacement modal update based on mode shapes including measurement errors may not be successful. In this research, strain mode shapes are used as modal data because the strain mode shapes measured by strain gauges are more sensitive than the displacement mode shapes with respect to the change of the parameters concerned in FE stiffness matrix...

• 한국CDE학회논문집
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• 제7권4호
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• pp.269-279
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• 2002

Geometric shape morphing is an interesting geometric operation that interpolates two geometric shapes to generate in-betweens. It is well known that Minkowski operations can be used to test and build collision-free motion paths and to modify shapes in digital image processing. In this paper, we present a new geometric modeling technique to control the morphing on geometric shapes based on Minkowski sum. The basic idea develops from the linear interpolation on two geometric shapes where the traditional algebraic sum is replaced by Minkowski sum. We extend this scheme into a Bezier-like control structure with multiple control shapes, which enables the interactive control over the intermediate shapes during the morphing sequence as in the traditional CAGD curve/surface editing. Moreover, we apply the theory of blossoming to our control structure, whereby our control structure becomes even more flexible and general. In this paper, we present mathematical models of control structure, their properties, and computational issues with examples.

• Structural Engineering and Mechanics
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• 제39권5호
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• pp.733-750
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• 2011

Recently, identification of modal parameters using the response only data has attracted considerable attention particularly where the classic modal testing methods is difficult to conduct. One drawback of the response only data, also known as Operational Modal Analysis (OMA), is that only the unscaled mode shapes can be obtained which restricts the applications of OMA. The Mass change method is a usual way to scale the operational mode shapes. In this article a new method is proposed to optimize the additive mass for scaling of the unscaled mode shapes from OMA for which a priori knowledge of the Finite Element model of structure is required. It is shown that the total error of the scaled mode shapes is minimized using the proposed method. The method is validated using a numerical case study of a beam. Moreover, the experimental results of a clamped-clamped beam demonstrate the applicability of the method.