• 농촌지도와개발
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• 제30권1호
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• pp.31-41
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• 2023

This study aims to examine the structural relationships among rurality perception, tourism attitude, and behavioral intention in rural healing tourism. Particularly, this study focused on the mediation effect of attitude. Data were collected from 658 rural healing tourists by online survey. SPSS 28.0 and AMOS 28.0 were used for frequency, exploratory factor, confirmatory factor, and structural equation modeling analyses. The results of structural equation modeling indicate perception of rurality had a positive effect on attitude and behavioral intention. In addition, attitude mediated the relationships between perception of rurality and behavioral intention. The results of this study suggest the importance of understanding the interests and pursuits of rural healing tourists and providing them with the values they want. Since rurality has a direct influence on attracting healing tourists, it is necessary to establish a positive image of rural healing tourism.

• Geomechanics and Engineering
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• 제37권1호
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• pp.21-29
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• 2024

The effective management of damage in tunnels is crucial for ensuring their safety, longevity, and operational efficiency. In this paper, we propose an educational management model tailored specifically for addressing damage in tunnels, utilizing numerical solution techniques. By leveraging advanced computational methods, we aim to develop a comprehensive understanding of the factors contributing to tunnel damage and to establish proactive measures for mitigation and repair. The proposed model integrates principles of tunnel engineering, structural mechanics, and numerical analysis to facilitate a systematic approach to damage assessment, diagnosis, and management. Through the application of numerical solution techniques, such as finite element analysis, we demonstrate the efficacy of the proposed model in simulating various damage scenarios and predicting their impact on tunnel performance. Additionally, the educational component of the model provides valuable insights and training opportunities for tunnel management personnel, empowering them to make informed decisions and implement effective strategies for ensuring the structural integrity and safety of tunnel infrastructure. Overall, the proposed educational management model represents a significant advancement in tunnel management practices, offering a proactive and knowledge-driven approach to addressing damage and enhancing the resilience of tunnel systems.

• 한국구조물진단유지관리공학회 논문집
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• 제11권1호
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• pp.153-162
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• 2007

1988년 이전에 건설된 벽식 구조 아파트는 내진규정의 적용을 받지 않아 리모델링을 위해서는 현행법규에 적합한 내진보강이 필요하다. 본 연구에서는 벽체 신설 공법에 의한 내진 보강효과를 분석하기 위하여, 개발된 리모델링 건축 평면 내에서 전단벽의 신설이 가능한 위치별 보강 효과와 벽량 및 벽두께의 변화에 따른 내진 보강 효과를 분석하도록 하였다. 내진성능의 평가는 층간 횡 변위를 이용하여 허용 층간변위의 만족여부에 의하여 분석하였으며, 건축물의 구조 모델은 슬래브의 횡 방향 기여도를 고려한 유효보 모델을 사용하였다. 본 연구의 결과에 따르면 리모델링 시 단위 모듈별 내진보강이 가능하며, 전단벽의 신설 위치와 벽량에 따라 건물 건체의 거동에 영향을 받는 것을 확인 할 수 있다.

• 한국초등과학교육학회지:초등과학교육
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• 제28권3호
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• pp.292-303
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• 2009

In this study, we investigated the characteristics of the analogies, the mapping understanding, and the mapping errors on saturated solution of scientifically-gifted and general elementary students. Fifth graders (n=60) at four scientifically-gifted education institutes in Seoul and/or Gyeonggi province and fifth graders (n=91) at three elementary schools in Seoul were selected and assigned to the scientifically-gifted group and the general group respectively. After the students of each group performed the experiment and were taught about the target concept in the first class, they administered the test on the self-generating analogies on the target concept in the second class. The results revealed that the students in the scientifically-gifted group made more analogies, especially verbal/pictorial, structural/functional, enriched, and higher systematic ones, and had deeper understanding of the analogy than those in the general group. The numbers of the shared attributes included in the student-generated analogies and the scores of the mapping understanding of the students in the scientifically-gifted group were significantly higher than those in the general group. The students in the scientifically-gifted group had fewer mapping errors than those in the general group. However, not a few students in the scientifically-gifted group had at least one mapping error. Educational implications of these findings are discussed.

• 디지털융복합연구
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• 제16권4호
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• pp.355-361
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• 2018

본 연구는 중학생의 자기이해가 자기주도 학습에 어떠한 영향을 미치는지 알아보며, 자기이해가 자기주도 학습에 미치는 영향관계에서 미래지향적 사고가 갖는 매개효과를 분석하는데 목적이 있다. 이를 위해 G지역 중학생 240명을 대상으로 자기이해 척도, 미래지향적 사고 척도, 자기주도 학습 척도를 이용하여 설문조사를 실시하였다. 매개효과를 검증하기 위해 구조방정식 모형을 사용하였다. 주요 분석결과는 다음과 같다. 첫째, 중학생의 자기이해가 자기주도 학습에 영향을 미치는 것으로 분석되었다. 둘째, 자기이해가 자기주도 학습에 미치는 영향에 있어서 미래지향적 사고는 완전 매개효과를 보이는 것으로 분석되었다. 이상의 결과는 중학생의 자기주도 학습 고취를 위해 자기이해와 미래지향적 사고 발달을 고려한 전략이 필요함을 시사하며, 가정과 학교차원의 자기이해 및 미래지향적 사고 프로그램 개발에 기초 자료로 활용될 수 있을 것이다.

• Korean Journal of Acupuncture
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• 제27권2호
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• pp.1-11
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• 2010

Objectives : The aim of the study is to explain the general guidelines of the WHO standard acupuncture point locations (APLs). Understanding the general guidelines will enable experts to make the clear use of the standard APL for education, research and practice. Methods : In the beginning of development of the standard APL, experts made general guidelines to draw mutual agreements of the three nations (Korea, China, and Japan) on the standard APL. The guidelines include point locating methods, syntax of descriptive sentences, landmarks on body surface, reference acupuncture points, usage of anatomical terminology, and proportional bone measurements. Results : We found that there are some considerable problems in practical use of the APLs due to the strict application of anatomical terms, even on accessory phrases such as region of body in the sentence of each description. Conclusions : We hope that the study helps readers expand the understanding of the newly developed standard APLs resulting from increased application of acupuncture points. Also, it would be a reference to revise the WHO standard APLs in the future.

• Journal of Mechanical Science and Technology
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• 제17권6호
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• pp.836-843
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• 2003

The polymer composites contain numerous internal boundaries and its structural elements have different responses and different resistances under the same service environment. Fatigue phenomenon is much more complex in composites than homogeneous materials. An understanding of the fracture behavior of polymer composite materials subjected to constant and cyclic loading is necessary for predicting the life time of structures fabricated with polymers. There is a need to acquire a better understanding of the fatigue performance and failure mechanisms of composites under such conditions. Therefore, in this study the analyses of fiber orientation and fracture mechanism for low cycle fatigue crack have been studied by SEM and LM for observing the ultrathin sections.

• Interaction and multiscale mechanics
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• 제4권4호
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• pp.247-255
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• 2011

Understanding the structural stability of carbon nanostructure under heat treatment is critical for tailoring the thermal properties of carbon-based material at small length scales. We investigate the heat resistance of the single carbon nanoball ($C_{60}$) and carbon nanoonions ($C_{20}@C_{80}$, $C_{20}@C_{80}@C_{180}$, $C_{20}@C_{80}@C_{180}C_{320}$) by performing molecular dynamics simulations. An empirical many-body potential function, Tersoff potential, for carbon is employed to calculate the interaction force among carbon atoms. Simulation results shows that carbon nanoonions are less resistive against heat treatment than single carbon nanoballs. Single carbon nanoballs such $C_{60}$ can resist heat treatment up to 5600 K, however, carbon nanoonions break down after 5100 K. This intriguing result offers insights into understanding the thermal-mechanical coupling phenomena of nanodevices and the complex process of fullerenes' formation.

• International Journal of Aeronautical and Space Sciences
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• 제13권4호
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• pp.507-514
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• 2012

The present study is the analyses of what has been attempted and what was understood in terms of improving the regression rate and enlarging the basic understanding of internal flow dynamics. The first part is mainly intended to assess the role of helical grain configuration in the regression rate inside the hybrid rocket motor. To improve the regression rate, a combination of swirl (which is an active method) and helical grain (which is a passive method) was adopted. The second part is devoted to the internal flow dynamics of hybrid rocket combustion. A large eddy simulation was also performed with an objective of understanding the origin of isolated surface roughness patterns seen in several recent experiments. Several turbulent statistics and correlations indicate that the wall injection drastically changes the characteristics of the near-wall turbulence. Contours of instantaneous streamwise velocity in the plane close to the wall clearly show that the structural feature has been significantly altered by the application of wall injection, which is reminiscent of the isolated roughness patterns found in several experiments.

• Biomolecules & Therapeutics
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• 제25권1호
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• pp.4-11
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• 2017

Heterotrimeric G proteins are key intracellular coordinators that receive signals from cells through activation of cognate G protein-coupled receptors (GPCRs). The details of their atomic interactions and structural mechanisms have been described by many biochemical and biophysical studies. Specifically, a framework for understanding conformational changes in the receptor upon ligand binding and associated G protein activation was provided by description of the crystal structure of the ${\beta}2$-adrenoceptor-Gs complex in 2011. This review focused on recent findings in the conformational dynamics of G proteins and GPCRs during activation processes.