• 한국콘텐츠학회논문지
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• 제12권12호
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• pp.810-822
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• 2012

본 연구에서는 다문화가정 아동의 스트레스 대처양식이 우울에 미치는 영향에서 사회적 지지의 매개효과를 살펴보고자 하였다. 서울, 경기, 인천의 다문화가정 아동 총 107명을 대상으로 설문조사를 실시하였다. 본 연구의 결과는 첫째, 다문화가정 아동의 스트레스 대처양식과 우울은 부적관계, 사회적 지지와 우울과는 부적 상관관계가 나타났다. 둘째, 다문화가정 아동의 소극적 스트레스 대처, 적극적 스트레스 대처양식 수준이 높을수록 아동의 우울정서, 행동장애, 흥미상실, 자기비하, 신체적 증상 수준은 낮음을 알 수 있었다. 셋째, 다문화가정 아동의 교사지지가 높을수록 스트레스 대처양식과 우울과의 관계를 부분매개하고 있음을 알 수 있다. 넷째, 다문화가정 아동의 스트레스 대처양식이 우울에 미치는 영향에서 또래 지지의 매개효과를 살펴본 결과 다문화가정 아동의 우울에는 스트레스 대처양식과 또래 지지가 상호작용하여 매개변수로 작용하는 것으로 나타났다. 다문화가정 아동의 교사지지가 높을수록 스트레스 대처양식과 우울과의 관계를 부분매개하고 있음을 알 수 있다.

• 건축사
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• 11호통권82호
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• pp.22-25
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• 1975

The aim of this study is the introduction of simplified method for the design stress analysis of multi-span gable frame structures with crane supports. Under the author's assumptions made previously for the same structures of single span, simplified stress analysis and exact computer analysis are excuted for some multi-span sample structures. Comparing the results of both stress analysis and with some modifications, a feasible simplified method for the design stress analysis of multi-span gable frame structures with crane supports is established.

• Journal of Biosystems Engineering
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• 제25권6호
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• pp.517-526
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• 2000

A series of experiments was conducted to evaluate the capability of detecting nutrimental deficient stress of N, P and Ca of a tomato plant using several fast and intact type physiological properties measuring devices - a chlorophyll content meter an infra-red thermometer to measure leaf temperature a chlorophyll fluorescence meter a porometer an optical spectrometer a multi-scan radiometer and a canopy analyzer. to detect N deficient stress a chlorophyll content meter a spectrometer and a multi-scan radiometer were useful and their possibility to detect was estimated as about 50%, 100% and 100% respectively. To detect P deficient stress the infra-red thermometer the porometer and the spectrometer proved their usefulness an their possibility to detect was estimated as about 70%, 70% and 70% respectively. To detect Ca deficient stress an thermometer a porometer a spectrometer and a multi-scan radiometer were useful and their possibility to detect was estimated as about 60%, 70%,80% and 100% respectively. The experiments resulted that use of a spectrometer and a multi-scan radiometer in combination with a chlorophyll content meter an infra-red thermometer and a porometer were desirable to distinguish the nutrimental stress tested in the study.

• Structural Engineering and Mechanics
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• 제41권4호
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• pp.495-508
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• 2012

The strength theory of concrete is significant to structure design and nonlinear finite element analysis of concrete structures because concrete utilized in engineering is usually subject to the action of multi-axial stress. Experimental results have revealed that lightweight aggregate (LWA) concrete exhibits plastic flow plateau under high compressive stress and most of the lightweight aggregates are crushed at this stage. For the purpose of safety, therefore, in the practical application the strength of LWA concrete at the plastic flow plateau stage should be regarded as the ultimate strength under multi-axial compressive stress state. With consideration of the strength criterion, the ultimate strength surface of LWA concrete under multi-axial stress intersects with the hydrostatic stress axis at two different points, which is completely different from that of the normal weight concrete as that the ultimate strength surface is open-ended. As a result, the strength criteria aimed at normal weight concrete do not fit LWA concrete. In the present paper, a multi-axial strength criterion for LWA concrete is proposed based on the Unified Twin-Shear Strength (UTSS) theory developed by Prof Yu (Yu et al. 1992), which takes into account the above strength characteristics of LWA under high compressive stress level. In this strength criterion model, the tensile and compressive meridians as well as the ultimate strength envelopes in deviatoric plane under different hydrostatic stress are established just in terms of a few characteristic stress states, i.e., the uniaxial tensile strength $f_t$, the uniaxial compressive strength $f_c$, and the equibiaxial compressive $f_{bc}$. The developed model was confirmed to agree well with experimental data under different stress ratios of LWA concrete.

• 한국산학기술학회논문지
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• 제17권1호
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• pp.544-552
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• 2016

본 연구는 다문화 청소년의 스트레스와 학교생활 적응 상태를 파악하고 자아존중감, 사회적 지원, 스트레스 대처에 따라 어떠한 변화가 나타나는 지를 확인하여 향후 다문화 청소년을 위한 프로그램 개발의 기초자료를 활용되고자 시도되었다. 이를 위해 구조방정식을 활용하여 다문화가정 청소년의 스트레스와 학교생활적응 간의 관계를 파악하고, 스트레스 대처, 사회적 지원, 자아존중감의 매개효과를 살펴보고자 하였다. 본 연구의 결과는 다음과 같다. 다문화가정 청소년의 스트레스는 사회적 지원과 자아존중감에는 음(-)의 영향을 미쳤다. 하지만 스트레스 대처는 통계적으로 유의한 영향이 발견되지 못했다. 이어서 분석한 스트레스 대처, 사회적 지원, 자아존중감은 모두 스트레스와 학교생활적응 간의 관계에서 정(+)의 매개효과가 있음이 나타났다.

• 한국실내디자인학회논문집
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• 제27권1호
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• pp.80-87
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• 2018

This study aims to find gender differences in inpatients' privacy and stress concerns in multi-bed hospital room. In the literature review, we consider the characteristics of multi-bed hospital room and patients' privacy as a psychological environment factor. In the survey research, the questionnaires were used to understand the inpatients' general characteristics and privacy requirements. A total of 109 copies were analyzed through a cross-tabulations and T-test using the SPSS 18.0. Results and conclusions are as follows: (1) In the case of multi-bed room patients, there were some gender differences in privacy and stress, but the differences were limited. (2) There is a difference in the patient 's preference of the hospital room according to gender, and this is related to the privacy characteristic. (3) The social communication and strolling are commonly effective stress relief methods for both men and women, so space is needed to do this methods. The meaning of this study is to specify the privacy and stress of the inpatients in multi-bed patients' room.

• International Journal of Advanced Culture Technology
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• 제7권1호
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• pp.155-161
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• 2019

This study was to identify the effects of home visit intervention program for Holistic Healthcare of multi-culture Couples. It used a non-equivalent control group pretest-posttest design quasi-experimental research. The subjects of this study consist of 20 couples for experimental and control groups. Multi-cultural couples comprised of foreign women married to Korean men in farm and fishery areas. The research tools were used stress index by SA-3000P (Medicare co. Ltd. KOREA), Center for Epidemiologic Studies-Depression Scale (CES-D), and World Health Organization Quality of Life (WHOQOL-Bref). The experimental group of the wives had lower stress index than the control group, the experimental group of the husband showed lower stress index than the control group, (t=-3.14, p=.002). The wife (t=-3.75, p=.001) and husband (t=-4.20, p=.001) of the experimental group showed lower depression scores than the control group. Both the wife (t=3.86, p=.001) and husband (t=5.28, p=.001) showed higher scores for quality of life compared to the control group. It was found that this holistic healthcare home visit program is an effective program to make improvements on stress, depression and quality of life for multi-cultural couples. Therefore, as the intervention program developed in this study is home visits for the holistic health of multi-cultural couples, and it is judged that it can be implemented at the local social health centers or healthcare centers.

• 대한기계학회논문집A
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• 제32권8호
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• pp.642-653
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• 2008

In this paper, we propose a 3-D finite element (FE) analysis model with combined physical behavior and kinematical impact factors for evaluation of residual stress in multi-impact shot peening. The FE model considers both physical behavior of material and characteristics of kinematical impact. The physical parameters include elastic-plastic FE modeling of shot ball, material damping coefficient, dynamic friction coefficient. The kinematical parameters include impact velocity and diameter of shot ball. Multi-impact FE model consists of 3-D symmetry-cell. We can describe a certain repeated area of peened specimen under equibiaxial residual stress by the cell. With the cell model, we investigate the FE peening coverage, dependency on the impact sequence, effect of repeated cycle. The proposed FE model provides converged and unique solution of surface stress, maximum compressive residual stress and deformation depth at four impact positions. Further, in contrast to the rigid and elastic shots, plastically deformable shot produces residual stresses closer to experimental solutions by X-ray diffraction. Consequently, it is confirmed that the FE model with peening factors and plastic shot is valid for multi-shot peening analyses.

• 한국군사과학기술학회지
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• 제3권2호
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• pp.179-188
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• 2000

Multi-disciplinary optimization design concept can provide a solution to many engineering problems. In the field of structural analysis, much development of size or topology optimization has been achieved in the application of research. This paper demonstrates an optimum design of a multi-layer cylindrical tube which behaves thermoelastically. A multi-layer cylindrical tube that has several different material properties at each layer is optimized within allowable stress and temperature range when mechanical and thermal loads are applied simultaneously. When thermal loads are applied to a multi-layer tube, stress phenomena become complicated due to each layer's thermal expansion and the layer thicknesses. Factors like temperature; stress; and material thermal thicknesses of each tube layer are very difficult undertaking. To analyze these problems using an efficient and precise method, the optimization theories are adopted to perform thermoelastic finite element analysis.

• 한국정밀공학회지
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• 제21권5호
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• pp.114-121
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• 2004

Recently, the finite element absolute nodal coordinate formulation (ANCF) was developed for the large deformation analysis of flexible bodies in multi-body dynamics. This formulation is based on the finite element procedures and the general continuum mechanics theory to represent the elastic forces. In this paper, a computation method of dynamic stress in flexible multi-body dynamics using absolute nodal coordinate formulation is proposed. Numerical examples, based on an Euler-Bernoulli beam theory, are shown to verify the efficiency of the proposed method. This method can be applied for predicting the fatigue life of a mechanical system. Moreover, this study demonstrates that structural and multi-body dynamic models can be unified in one numerical system.