• 한국산업융합학회 논문집
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• 제19권3호
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• pp.109-124
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• 2016

The objective of this paper is to find the density, stiffness, and strength of truss-wall diamond corrugation model combined with pinwheel truss inside space. The truss-wall diamond corrugation (TDC) model is defined as a unit cell coming from solid-wall diamond corrugation (SDC) model. Pinwheel truss-wall diamond corrugation (P-TDC) model is made by TDC connected with pinwheel structure inside of the space. Derived ideal solutions of P-TDC is based on truss-wall and pinwheel truss model at first. And then it is compared with Gibson-Ashby's ideal solution. To validate the ideal solutions of the P-TDC, ABAQUS software is used to predict the density, strength, and stiffness, and then each of them are compared to the ideal solution of Gibson-Ashby with a log-log scale. Applied material property is stainless steel 304 because of having cost effectiveness. Applied parameters for P-TDC are 1 thru 5 mm diameter within fixed opening width as 4mm. In conclusion, the relative Young's modulus and relative yield strength of the P-TDC unit model is reasonable matched to the ideal expectations of the Gibson-Ashby's theory. In nearby future, P-TDC model is hoped to be applied to make sandwich core structure by advanced technologies such as 3D printing skills.

• 한국주거학회논문집
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• 제14권6호
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• pp.105-114
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• 2003

This study aims to investigate the thoughts of the utopians for the ideal community in 19th century. Around late 18th century, the ideal community proposals by the utopians were coming out as an alternative to reform the social and economical structure. The experimental community proposals which suggested by the utopian socialists such as Robert Owen and Charles Fourier took their emphasis on the social reform to improve the environment of work in terms of social and economical organization. While the thoughts of ideal community showing up in the literature by utopians were based on the state socialism that accompanied by the ultimate corrective system of production and distribution and the unified social system, the physical organization was described in more detail without a restriction in contrast to the real proposals for the ideal community. Based on the experimental community and the ideal community in the literature in 19th century, the urban model of late 19th century were proposed as a real community model. With the optimistic belief to the technological development resulted from the Industrial Revolution, the urban models of utopia placed greater emphasis on the physical organization than the previous ideal communities in 19th century and had much influence on the modern urban planning in 20th century.

• 복식
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• 제55권6호
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• pp.15-23
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• 2005

The purpose of this study was to interpret consistently a phenomenon in Korean Women's ideal body with analyzing the change of the body of winners in beauty contests such as Miss Korea and Super Model. The method of this study was to investigate the objective data of body size of winners in beauty contests. The meanings in the change of Korean Women's ideal body are as follows. First, the body have got the commercial value with the start of Miss Korea contest and maximized its commercial purpose with the introduction of Super Model contest. While Miss Korea contestants are evaluated by their body, character, intelligence altogether, Super Model contestants are evaluated by body itself than other factors. So the body of Super Model is accepted as the highly value added commodity. Second, a tall height as a natural gift anions characteristic of the ideal body have become the significant factor of the myth of social and commercial success.

• 대한기계학회논문집
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• 제18권7호
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• pp.1751-1758
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• 1994

A new set of governing equations is derived for the dynamic analysis of the Free-Piston Stirling Engines(EPSE). Equations from the ideal adiabatic model for the thermodynamic analysis of the working fluid are incoporated with the equations of motion for the moving masses of the system, resulting in a set of nonlinear differential equations. The coupled set of equations are numerically integrated with proper intial conditions to obtain a steady state response of the engine. The proposed method is compared with the conventional method of analyzing EPSE based mainly on the ideal isothermal model. The results clearly shows the limitationsl of the conventional methods and the relative advantages of the method proposed in the present study.

• 한국산업융합학회 논문집
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• 제19권3호
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• pp.133-143
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• 2016

The objective in here is to find the density, stiffness, and strength of truss-wall rectangular (TWR) model which is combined with lattice truss (MLT) inside space. The TWR unit-cell model is defined as a unit cell originated from a solid-wall rectangular (SWR) model and it has an empty space inside. Thus, the empty space inside of the TWR is filled with lattice truss model defined as TWR-MLT. The ideal solutions derived of TWR-MLT are based on TWR with MLT model and it has developed by Gibson-Ashby's theory. To validate the ideal solutions of the TWR-MLT, ABAQUS software is applied to predict the density, strength, and stiffness, and then each of them are compared with the Gibson-Ashby's ideal solution as a log-log scale. Applied material property is stainless steel 304 because of cost effectiveness and easy to get around. For the analysis, SWR and TWR-MLT models are 1mm, 2mm, and 3mm truss diameter separately within a fixed 20mm opening width. In conclusion, the relative Young's modulus and relative yield strength of the TWR-MLT unit model is reasonably matched to the ideal expectations of the Gibson-Ashby's theory. In nearby future, TWR-MLT model can be verified by advanced technologies such as 3D printing skills.t.

• 복식문화연구
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• 제30권4호
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• pp.563-578
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• 2022

Society's emphasis on a thin body ideal may intensify an individual's negative perceptions of fatness. The purpose of the present study was to examine the relationship between sociocultural attitudes toward appearance (awareness and internalization of the female ideal) and anti-fat attitudes among middle-aged Korean women. In addition, the aim was to examine whether the body internalization of female ideals was a mediator in the proposed model. Participants included a sample of 264 middle-aged Korean women who completed a series of measures online. The following information was collected through online questionnaires: awareness and internalization of the female ideal, attitudes toward fat, body weight perception, and demographics. Data were analyzed using correlation analysis, descriptive analysis, factor analysis, and structural equation modeling. The measurement model and the structural model testing provided an acceptable fit to the data, and all proposed pathways in the research model were statistically significant. Awareness of the female ideal was significantly and positively associated with internalization, and it significantly and positively predicted both constructs of anti-fat attitudes. Additionally, awareness of the female ideal was significantly and positively indirectly associated with attitudes toward fat people-dislike and willpower mediated by internalization. Overall, these findings suggest that society's emphasis on female appearance and a thin body can ultimately result in significant stigmatization of overweight/obese individuals. This study emphasizes the importance of establishing a healthy appearance standard to reduce anti-fat prejudice.

• 센서학회지
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• 제19권3호
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• pp.191-196
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• 2010

In this paper, modeling of the non-ideal frequency response, especially "notch-and-spike" magnitude phenomenon and phase lag distortion, are discussed. To characterize the non-ideal frequency response, a new electro-mechanical simulation model based on SPICE is proposed using the driving loop of the capacitive vibratory gyroscope. The parasitic components of the driving loop are found to be the major factors of non-ideal frequency response, and it is verified with the measurement results.

• 대한수학교육학회지:학교수학
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• 제5권3호
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• pp.361-384
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• 2003

본 연구는 연립일차방정식에 관한 문장제에서 IDEAL 문제 해결 모형을 바탕으로 "구조-표현"을 강조한 교수-학습을 실시하였을 때 학생들의 문제해결 과정을 탐구하였다. 연구 결과, 구조-표현을 강조한 학급의 학생들이 이를 강조하지 않은 학급의 학생들보다 문제해결 능력이 향상되었으며, 동치문제, 동형문제, 유사문제를 더 정확하게 구별하였다. 또한, 구조-표현을 강조한 학급의 학생들이 그렇지 않은 학급의 학생들보다 문맥에 대한 이해 및 불완전한 정보 추출에서의 오류, 미지수간의 내적 관계에 대한 수학적 기호표현으로의 불완전한 전이 오류, 적절하지 않은 방정식 생성 오류의 발생 빈도가 적었다. 그리고, IDEAL 문제 해결 모형의 문제의 확인 단계(I)와 문제의 정의 단계(D)에서 학생들이 문제 해결 계획을 수립하기 위해 문제를 읽고 이해하여 문제를 해결하는 과정을 중점적으로 분석한 결과, 직접 변환 모델과 구조 도식 모델이 나타났다.

• 영어어문교육
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• 제18권1호
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• pp.115-132
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• 2012

In order to confirm ecological validity of D$\ddot{o}$rnyei's second language motivational self, the present study investigated 495 South Korean secondary school students' L2 learning motivation and motivated behavior by using a questionnaire survey. The participants' ideal L2 self, ought-to L2 self, integrativeness, and instrumentality were examined and compared to identify which motivational factor had the most effect on their motivated L2 learning behavior. Among Korean secondary school students, the concept of integrativeness was replaced with the ideal L2 self as a more appropriate concept for understanding Korean secondary school students' L2 learning motivation. As for instrumentality, promotional aspects demonstrated a significant correlation with both the ideal and ought-to L2 selves, whereas preventional aspects showed a relatively high correlation with the ought-to L2 self. The ideal L2 self had the most impact on the motivated behavior, and the ideal L2 self and ought-to L2 self reflected the students' different motivational characteristics. It is suggested that D$\ddot{o}$rnyei's (2005, 2009) L2 motivational self system can be a better psychological model than Gardner's (1985) socio-educational model for understanding Korean secondary school students' L2 learning motivation.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1561-1564
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• 2003

In the dynamic analysis model of full vehicles, the ball joint is usually modeled as an ideal joint. Searching a ball joint, the engineering plastic covers metal and the plastic has little compliance. It is expected that the compliance will physically have an influence on load transfer. This thesis presents a dynamic model considering the compliance of a ball joint, and studies an influence related to load transfer. It models the compliance of a ball joint to 3 directional spring. Likewise, it researches the load of a ball joint via a four-post simulation of a full vehicle, comparing with a model considered compliant and the model of an ideal joint. As a result, the difference between the compliance and the ideal joint model was determined. For this reasons, to conduct precision load prediction for durability analysis, dynamic analysis considering the compliance of bali joint should be required.