• 성인간호학회지
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• 제22권5호
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• pp.477-487
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• 2010

Purpose: The purpose of this study was to explore health-related experiences of the foreign wives. Methods: A qualitative research design was used to understand the health-related experiences of foreign wives. Ten informants were interviewed from December 2007 to December 2009. Results: The health related life experiences of foreign wives were analyzed within a self development process; Choice and struggle, Change and opportunity, and Settlement and expectation. The theme of choice and struggle includes physical and emotional stress in the initial stage of marriage. The second process of change and opportunity focused on the coping strategies of the women having power after knowledge acquisition from the multicultural family support center. The last theme was health and happiness from the women' perspectives. Conclusion: This study has emphasized the health condition of the foreign wives. Since foreign wives are members of Korean society, health care professionals need to design health services to meet their needs.

• Smart Structures and Systems
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• 제21권4호
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• pp.469-477
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• 2018

This paper presents a numerical solution for the thick cylinders made of functionally graded materials (FGMs) with a constant Poisson's ratio and an arbitrary Young's modulus. We define two fundamental solutions which are derived from an ordinary differential equation under two particular initial boundary conditions. In addition, for the single layer case, we can define the transfer matrix N. The matrix gives a relation between the values of stress and displacement at the interior and exterior points. By using the assumed boundary condition and the transfer matrix, we can obtain the final solution. The transfer matrix method also provides an effective way for the solution of multiply layered cylinder. Finally, a lot of numerical examples are present.

• 한국산업융합학회 논문집
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• 제20권5호
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• pp.411-417
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• 2017

In this study, Sunroot was used as material in the fermentation process. Sunroot are widely distributed in Korea, The main component is composed of inulin. Fermented vinegar stimulates digestion in the body, as well as to relieve stress is a cause of increasing the neurotransmitter-Serotonin of the body. Therefore, we conducted fermentation studies using sunroot. This research conducted seven days, and the pH and brix value analysis was done every 12 hours during fermentation process. The experimental results show that the fermentation product under blender treatment is better than cutting treatment and without cutting treatment. Initial brix 25% is the best treatment for fermentation because produce fermentation product with a good taste and aroma than other treatment.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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• pp.361-366
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• 2002

The deterioration of concrete structure due to corrosion of the reinforcement has created big financial losses on the overall industries. The volume expansion of the corrosion products causes internal pressure to concrete wall around reinforcing bar. If the maximum principal stress induced by internal pressure exceeds the tensile strength of the concrete at any point of time, a crack forms at any point of material. Therefore, in terms of life assessment of concrete structure, it is very important to predict the amount of corrosion products which induces initial concrete cracking. With this objective, this paper proposes the critical amount of corrosion products at interface between reinforcement and concrete using finite element analysis. If an actual survey of corrosion rates could be made, the model might supply information for condition assessment of existing concrete structure. As the mechanical properties of corrosion product and instantaneous geometry of corroded steel are considered in the analysis, the value obtained will be more realistic.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제50권8호
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• pp.367-373
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• 2001

This paper presents racetrack High Temperature Superconducting (HTS) magnet with iron plates to achieve the maximum current-carrying capacity and the simple shape that can easily be wound and jointed. On the basis of the magnetic field analysis using Biot-Savart's law and 3 Dimensional Finite Element Analysis (3D FEA), this study is focused on the function of iron plates, which is to obtain smaller B${\perp}$, and stress and strain condition of Ag-sheathed Bi-2223 37-filament HTS tapes are considered. Moreover, the measured performance of the magnet with iron plates improved by 50% on the basis of initial magnet.

• 대한전자공학회논문지
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• 제27권5호
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• pp.729-736
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• 1990

Oxide (RTO), nitrided-oxide(NO), and reoxidized-nitrided-oxide(ONO) films were formed by sequential rapid thermal processing. The film composition was investigated by Auger electron spectroscopy(AES). The Si/SiO2 interface and SiO2 surface are nitrided more preferentially than SiO2 bulk. When the NO is reoxidized, [N](atomic concentration of N) in the NO film decreased` especially, the decrease of [N] at the surface is considerable. The weaker the nitridation condition is, the larger the increase of thickness is as the reoxidation proceeds. The elelctrical characteristics of RTO, NO, and ONO films were evaluated by 1-V, high frequency (1 MHz) C-V, and high frequency C-V after constant current stress. The ONO film-which has 8 nm thick initial oxide, nitrided in NH3 at 950\ulcorner for 60 s, reoxidized in O2 at 1100\ulcorner for 60 s-shows good electrical characteristics such as higher electrical breakdown voltage and less variation of flat band voltage under high electric field than RTO, and NO films.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 춘계 학술발표회
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• pp.852-855
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• 2010

Numerical simulations for large scale triaxial tests with large diameter rockfill materials are conducted using distinct element method. For generation of compacted assembly with specific grain size distribution and initial material porosity, the clump logic method and expansion of generated particles are adapted. With micro parameters which are chosen by calibration process, discrete particle modelling of triaxial test in case of other confining stress and cyclic loading condition were conducted. Also numerical simulations of fluid injection into particulate materials were conducted to observe cavity initiation and propagation using distinct element method. The fluid scheme solves the continuity and Navior-Stokes equations numerically, then derives pressure and velocity vectors for fixed grid by considering the existence of particles within the fluid cell.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2003년도 봄 학술발표회 논문집
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• pp.45-52
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• 2003

A finite element procedure to estimate ultimate strength of space frames considering spread of plasticity is presented. The improved displacement field is introduced based on inclusion of second order terms of finite rotations. All the nonlinear terms due to bending and torsional moment as well as axial force are precisely considered. The concept of plastic hinge is introduced and the incremental load/displacement method is applied for the elasto-plastic analysis. The initial yield surface is defined based on the residual stress and the full plastification surface is considered under the combined action of axial force, bending and torsional moments. The elasto-plastic stiffness matrices are derived using the flow rule and the normality condition of the limit function. Finite element solutions for ultimate strength of space frames are compared with available solutions and experimental results.

• 한방안이비인후피부과학회지
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• 제29권3호
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• pp.240-248
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• 2016

Objectives: The purpose of this study is to report the effectiveness of Sihochunggan-tang gagambang in two patients with erythema multiforme which ocurred repeatedly in stress condition.Methods: This case study was conducted in two erythema multiforme(EM) patients who have visited Korean Medicine Clinic. All two patients were treated with Sihochunggan-tang gagambang and acupuncture. VAS(Visual Analogue Scale) score was used to check the subjective change of skin symptoms and itching sense.Results & Conclusions: The VAS score were decreased compared to the initial visit in all two patients in our study. And most skin symptoms and itching sense of two patients were improved. As a result of examining VAS scores and photographs, Sihochunggan-tang gagambang can be effective on EM in two cases in our study.

• Journal of Ship and Ocean Technology
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• 제2권1호
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• pp.42-57
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• 1998

Genetic Algorithm (GA) is applied to obtain optimal Inspection plan for fatigue deteriorating structures. The optimization problem is defined so as to minimize inspection cost in the 1ifs-time of the structure under the constraint that the increment of failure probability in each inspection interval is maintained below a target value. Optimization parameters are the inspection timing and the inspection quality. The inspection timing is selected from the discrete intervals such as one year, two years, three years, etc. The inspection quality is selected from the followings; no inspection, normal inspection, sampling inspection or precise inspection. The applicability of the proposed GA approach is demonstrated through the numerical calculations assuming a structure consisting of four member sets. Influences of the level of target failure probability, initial defect condition and stress increase due to plate thickness reduction caused by corrosion on inspection planning are discussed.