• 한국해안·해양공학회논문집
• /
• 제36권1호
• /
• pp.20-36
• /
• 2024

요 지 : 본 연구에서는 먼저 우리나라 해역별 해양환경 특성이 담긴 장기 파랑 관측자료로부터 Goda 모형을 활용하여 파력과 양력 시계열자료를 생성하였다. 이어 이렇게 생성된 시계열자료부터 Three-parameter Weibull distribution에 기반한 파력과 양력 확률모형을 개발하였다. 해역별로 다른 우리나라 해양환경은 파력과 양력 확률모형 모수에서도 그 차이를 확연하게 드러내었다. 충분히 발달한 풍성 파가 우월한 남해안의 경우 큰 Scale Coefficient, 작은 Location Coefficient, 1.3 전후의 Shape Coefficient로 특정되는 것을 확인하였다. 이에 비해 파랑의 성장이 취송거리에 의해 제한되는 서해를 마주하고 있는 군산의 경우 작은 Scale Coefficient, 큰 Location Coefficient, 2.0 전후의 Shape Coefficient로 특정되었다. 서해와 남해가 만나는 해역을 마주하고 있는 목포의 경우 작은 Scale Coefficient, 큰 Location Coefficient, 제일 작은 Shape Coefficient를 지녀 남해와 서해의 해양환경이 혼재한다는 사실도 확인할 수 있었다.

• Advances in Computational Design
• /
• 제7권1호
• /
• pp.81-98
• /
• 2022

This study presents the application of two indices for the locating of cracks in Reinforced Concrete (RC) structures, as well as the development of their modified forms to overcome limitations. The first index is based on mode shape curvature and the second index is based on the fourth derivative of the mode shape. In order to confirm the indices' effectiveness, both eigenvalues coupled with nonlinear static analyses were carried out and the eigenvectors for two different damage locations and intensities of load were obtained from the finite element model of RC beams. The values of the damage-locating indices derived using both indices were then compared. Generally, the mode shape curvature-based index suffered from insensitivity when attempting to detect the damage location; this also applied to the mode shape fourth derivative-based index at lower modes. However, at higher modes, the mode shape fourth derivative-based index gave an acceptable indication of the damage location. Both the indices showed inconsistencies and anomalies at the supports. This study proposed modification to both indices to overcome identified flaws. The results proved that modified forms exhibited better sensitivity for identifying the damage location. In addition, anomalies at the supports were eliminated.

• The Korean Journal of Pain
• /
• 제7권2호
• /
• pp.170-174
• /
• 1994

Stellate Ganglion (SG) of l0 cadavers were removed during autopsy at Saga Medical College. Length, width, thickness, shape and location of SG were measured before formalin fixation. The results are as follows; 1) Length, width, thickness of SG were 22.33+5.23mm, 9.34+2.23mm and 5.03+1.19mm in right respectively, and 29.67+10.56 mm, 11.29+3.20mm and 5.51+1.09mm respectively in left. 2) Weight of right SG is 0.69+0.25 gm and weight of left SG is 1.04+0.63 gm. 3) Shape of SG is oval and snowman type. 4) Location of SG is variably located from the base of 7th cervical vertebra to first thoracic vertebra.

• 한국해양공학회지
• /
• 제22권1호
• /
• pp.22-29
• /
• 2008

A numerical investigation is made on the effects of the location and shape of the front wall of an OWC(Oscillating Water Column) chamber on the hydroelastic response of a VLFS. Most of the studies on the effects of an OWC chamber on the response of a VLFS have assumed the location of the OWC chamber to be at the front of the VLFS. In the present study, an OWC-chamber is introduced at an arbitrary position in relation to a VLFS to determine the influence of the location and shape of the OWC chamber on the hydroelastic response of the VLFS. A finite element method is adopted as a numerical scheme for the fluid domain. or the finite element method, combined with a mode superposition method, is applied in order to consider the change of mass and stiffness The OWC chamber in a piecewise constant manner. or the facilitated anefficient analysis of The hydroelastic response of the VLFS, as well as the easy modeling of different shape and material properties for the structure. Reduction of hydroelastic response of the VLFS is investigated for various locations and front wall shapes of the owe chamber.

• 한국공간구조학회논문집
• /
• 제23권3호
• /
• pp.71-78
• /
• 2023

Recently, Free-Form and Irregular Shape high-rise buildings are constructed by IT technology development. Tilted shaped high-rise building which is one of Irregular shape high-rise buildings can cause lateral displacement by gravity load and lateral load due to tilted elevation shape. Therefore, it is necessary to review the behavior and structural aspects of the Tilted shape high-rise building by gravity load. In this paper, the dynamic characteristics of a tilted structure with a dual-core were analyzed with the core location as a design variable, and response behavior, vulnerable members, and vulnerable layers to earthquake loads were analyzed. As a result of the analysis, as the location of the core moved in an tilted direction, the eccentric distance and eccentric load decreased, reducing the axial force of the vertical members. However, the location of the core had little effect on the response.

• 한국정밀공학회지
• /
• 제16권9호
• /
• pp.9-17
• /
• 1999

This investigation is the result of the structural analysis by finite element method for optimal design of the cross beam with circular holes of the electric car-body. in order to install the air pipe and electric wire pipe that correspond signal between electric machines for the control system and to reduce the weight of the electric car-body, several circular areas from a cross beam should be taken off. What we want to perform is the optimal design of a cross beam with circular holes to posses equal stress in comparison with no hole cross beam. first, no hole cross beam as basic modal be chosen, executing the analysis, reviewing the distribution of stress and displacement at each location. several parameter should be adopted from the cross beam geometry like the location and shape of the hole to affect the maximum stress and displacement. So the analysis was executed by finite element analysis for finding optimal design parameter to the change of the location and shape of the circular hole. finally, the optimal design of the cross beam with circular holes was obtained and the maximum equivalent stress was compared with no hole cross beam at each location.

• 설비공학논문집
• /
• 제12권9호
• /
• pp.802-809
• /
• 2000

This study numerically analyzes the thermal and flow characteristics inside the header in PFHE(parallel-flow heat exchanger) by employing a three-dimensional turbulence modeling. The following quantities are examined by varying the injection angle of the working fluid, the location of entrance and the shape of entrance: flow nonuniformity, heat transfer rate, and flow distribution in each passage. The result shows that the degree of significance among the parameters affecting the header part is in the order of the injection angle, the shape of entrance, and the location of entrance. The result also indicates that heat transfer rates compared to the reference model are increased by about 152% for the angle of injection of -$20^{\circ}C$, by about 127% for the shape of entrance with right and left long rectangular form, and by about 108% for the location of entrance located at the lowest Position.

• 패션비즈니스
• /
• 제9권1호
• /
• pp.67-78
• /
• 2005

The purpose of this study is to evaluate the differences of visual evaluatations by variations in the location of the waistline of the basic skirt. In the main experiment, we make 6 samples: the 1cm-natural waistline, the 3cm-natural waistline, the 5cm-natural waistline, the 7cm-natural waistline, the 9cm-natural waistline, the 11cm-natural waistline. The data has been obtained from 43 fashion design majors. The data has analyzed by Frequency, Factor Analysis, Anova, Scheffe's test. The results of the experiment are as follows. 1. The visual effects by the location of the waistline are composed of 4 factors: the shape of the abdomen, the shape of the pelvic, the length of the upper body, and the vertical effect of the lower body. 2. The visual effects by the location of the waistline have significant differnces all factors. The location of the waistline, which have the best visual effect, are the 3cm-waistline, the 5cm-waistline, and the 7cm-waistline. These location do not emphase the shape of the abdominal and pelvic regions, but they make the length of the lower part look slimmer and longer. 3. The visual image by the location of the waistline are corn posed of 3 factors: modesty, attractiveness, comfort. 4. The visual image by the location of the waistline have significant differnces all factors. In the visual image, the 1cm-waistline and the 5cm-waistline are evaluated badly in the aspects of modesty, attractiveness, comfort. The 9cm-waistline and the 11 cm-waistline are evaluated as having the best modesty and attraction features. The 3m-waistline are evaluated as the best comfort.

• 한국항행학회논문지
• /
• 제10권4호
• /
• pp.385-393
• /
• 2006

본 논문에서는 2.45GHz 대역 RTLS 환경에서 탐색범위 확장을 고려한 위치추정 알고리즘을 제안하고 평균 추정오차 성능을 분석하였다. 확장 가능한 탐색범위는 $300m{\times}300m$, 2차원 평면상의 정사각형으로, 가용리더의 배치 형태는 원형 배치와 사각형 배치 그리고 탐색범위 확장을 위한 축소된 사각형 배치를 고려하였다. 또한, RTLS의 위치추정 실험 조건으로 LOS 전파환경을 가정하였으며, 수신된 sub-blink 수에 따른 가용리더의 배치 형태별로 위치추정 성능을 분석하였다. 본 논문에서 제안하는 위치추정 알고리즘을 적용하여 위치를 추정한 결과, 원형 리더 배치가 탐색범위 확장이 유리한 사각형 리더 배치에 비하여 우수한 위치추정 정확도를 보였다. 이에, 위치추정의 정확도가 우수한 원형배치와 확장이 유리한 사각형 배치의 장점을 절충하여 탐색범위 확장을 위한 축소 사각형 배치를 제안하였으며, 실험 결과, 제안한 위치추정 알고리즘이 탐색범위 확장을 고려한 축소된 사각형 리더 배치에서도 높은 위치추정 성능이 나타남을 확인하였다.

• Communications for Statistical Applications and Methods
• /
• 제30권1호
• /
• pp.37-48
• /
• 2023

Shape analysis is a method for measuring, describing and comparing the shape of objects in geometric space. An important aspect is to obtain Procrustes distance based on least square method. We note that the shape is all the geometrical information that remains when location, scale and rotational effects are filtered out from an object. However, and unfortunately, when we cannot measure some landmarks which are some biologically or geometrically meaningful points of any object, it is not possible to measure the variation of all shapes of an object, including that of the incomplete object. Hence, we need to replace the missing landmarks. In particular, Albers and Gower (2010) studied the missing rows of configurations in Procrustes analysis. They noted that the convergence of their approach can be quite slow. In this study, alternatively, we derive an algorithm for estimating the missing landmarks based on the pre-shapes. The pre-shape is invariant under the location and scaling of the original configuration with the centroid size of the pre-shape being one. Therefore we expect that we can reduce the amount of total computing time for obtaining the estimate of the missing landmarks.