• Journal of Welding and Joining
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• v.29 no.2
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• pp.64-71
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• 2011

In this paper, crack propagation analyses in the inner diameter (ID) repair weld of the dissimilar metal weldment of a nozzle were performed using a finite element alternating method (FEAM). To calculate the theoretical solution for the crack tip stress intensity factor, a weak type singular integral equation consisted of crack surface traction and dislocation density function was constructed and solved in conjunction with the FEAM. A two-dimensional axisymmetric finite element nozzle model was prepared and ID repair welding was simulated. An initial crack, 10% depth of weld thickness, was assumed and crack propagation trajectory from the initial crack to the 75% depth of thickness was calculated using the FEAM. Crack growth versus time curve was also calculated and compared with the curves obtained from ASME code method. With the method constructed in this paper, crack propagation trajectory and crack growth time were calculated automatically and effectively.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.10
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• pp.1015-1024
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• 2020

This inductive study seeks to establish a conceptual background for theoretical development regarding talent misuse in the context of small and medium-sized enterprises (SME). The two objectives for the goal were (1) to explore and build a list of unethical treatment practiced on young talents; (2) to establish new framework for the special context or refining the existing framework on employee mistreatment. For the first goal, an attempt was made to develop a list of mistreating behavior by collecting and analyzing cases of ethical disputes. Analyses on 64 cases of talent mistreatment, namely 'passion pay', was conducted to present a conceptual ground for further investigation. Then, for the second objective, this study has proposed an integrative approach for assessing these ethical elements. The ethical implications were discussed based on an assessment conducted using three theories of ethics. Finally, a cluster analysis further shows the emergence of three groups based on the mistreating behaviors. We observed seven different mistreatment behaviors under four categories of mistreatment practices. Additionally, the cluster analysis results imply that talent mistreatment may be rooted in work characteristics. Organizational size may provide some contextual reasoning, but the extent to which this factor interacts with work characteristics left unclear.

• Journal of the Society of Naval Architects of Korea
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• v.41 no.2
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• pp.106-113
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• 2004

The block assembly of ship consists of a certain type of heat processes such as cutting, bending, welding, residual stress relaxation and fairing. The residual deformation due to welding is inevitable at each assembly stage. The geometric inaccuracy caused by the welding deformation tends to preclude the introduction of automation and mechanization and needs the additional man-hours for the adjusting work at the following assembly stage. To overcome this problem, a distortion control method should be applied. For this purpose, it is necessary to develop an accurate prediction method which can explicitly account for the influence of various factors on the welding deformation. Systematic and quantitative theoretical works to clarify the effects of various factors on the welding deformation have rarely been found. Therefore, in this paper, the effects of various factors, such as welding process and gravity on the butt welding deformation have been investigated through a number of numerical analyses. In addition, this paper proposes a simplified analysis method to predict the butt welding deformation in actual plate structure. For this purpose, a simple prediction model for butt welding deformations has been derived based on numerical and experimental results through the regression analysis. Based on these results, the simplified analysis method has been applied to some examples to show its validity.

• International Commerce and Information Review
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• v.6 no.2
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• pp.193-216
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• 2004

The management strategies of each company has been changed fundamentally owing to the emergence of digital economics by using internet. Therefore the efficient management of global e-port causes the main issues not only effect the survival and growth of ports but also exert new opportunities and fatal threats on them. Under the circumstances of these change, the Kwangyang port have to introduce e-biz for the purpose of increasing the level of their competition. The focus of this article is to suggest some strategies on the implementation of Kwangyang Global e-port in Korea. To analyse the e-port realities, I first reviewed the trends of e-marketing and e-biz. I chose and analysed website of four ports like Hongkong, Singapore, Antwerp and Hamburg as successful global e-port models. This article is focused to suggest the theoretical background by analysing the strategic points of Kwangyang global e-port which are divided in 6C: Contents, Communities, Connection, Commerce, Communication and Customization. This paper analyses many problems of Gwangyang port and presents various develpment ways to activate Gwangyang port. In order to be a global e-port, first of all Gwangyang port must improve global web-site by 6C. And also Gwangyang port have to constitute logistics hub site, create infrastructure needed to run electronic business more easily over the internet, establish nationwide network of industries, build up marine and port logistics information system.

• Nuclear Engineering and Technology
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• v.37 no.2
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• pp.201-206
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• 2005

Fretting, which is a special type of wear, is defined as small amplitude relative motion along the contacting interface between two materials. The structural integrity of steam generators in nuclear power plants is very much dependent upon the fretting wear characteristics of Inconel 690 U-tubes. In this study, a finite element model that can simulate fretting wear on the secondary side of the steam generator was developed and used for a quantitative investigation of the fretting wear phenomenon. Finite element modeling of elastic contact wear problems was performed to demonstrate the feasibility of applying the finite element method to fretting wear problems. The elastic beam problem, with existing solutions, is treated as a numerical example. By introducing a control parameter s, which scaled up the wear constant and scaled down the cycle numbers, the algorithm was shown to greatly reduce the time required for the analysis. The work rate model was adopted in the wear model. In the three-dimensional finite element analysis, a quarterly symmetric model was used to simulate cross tubes contacting at right angles. The wear constant of Inconel 690 in the work rate model was taken as $K=26.7{\times}10^{-15}\;Pa^{-1}$ from experimental data obtained using a fretting wear test rig with a piezoelectric actuator. The analyses revealed donut-shaped wear along the contacting boundary, which is a typical feature of fretting wear.

• Nuclear Engineering and Technology
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• v.27 no.6
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• pp.888-893
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• 1995

The turbulence structure for fully developed flow through the subchannels formed by the bare rod array depends on the pitch to rod diameter ratio. For fairly open spaced bare rod arrays, the distributions of the three components of the turbulent normal stresses are similar to those measured in circular pipe. However, for more closely spaced arrays, the turbulence structure, especially in the gap region, depart markedly from the pipe flow distribution. A linear relationship between turbulent normal stresses and turbulent kinetic energy for fully developed turbulent flow through regularly spaced bare rod arrays has been developed. This correlation can be used in connection with various theoretical analyses applied in turbulence research.

• Journal of the Korean Home Economics Association
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• v.32 no.2
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• pp.145-160
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• 1994

This paper reviews the feminist approach in family therapy field as a proper intervention for the sexist problems in Korean family. First this paper identifies the sexist problems according to the traditional family ideology structure and value conflicts due to the change of society in Korean family and analyses those problems referred to the actual situation of family counseling and therapy. Second this paper introduces the background for the emergence of the feminist family therapy. The feminist approach in family therapy had been emerged since the woman's psychology and feminist therapy appeared in psychology by the influence of women's movement in late 1960s Third the critiques to the existed family therapy from the viewpoint of feminist family therapy are raised. this approach which is challenging the existed family therapy and criticizing the main theoretical models especially emphasizes gender as a primary factor in the approaches of family problems and includes all the aspects of feminism an awareness of sexism and attempts to counteract the ways in which family therapy may reinforce women's surbodinate position. Fourth the techniques of feminist family therapy and the training methods for feminist family therapists are explained. this approach attempts to develop the clinical skills teaching tools and techniques to incorporate the feminist perspective into family therapy practices and proposes the various education and training methods. Finally this paper reviews interests in the feminist family therapy in Korea an has good prospects of increase of it.

• Proceedings of the Korean Geotechical Society Conference
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• 2008.10a
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• pp.1318-1327
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• 2008

Geotechnical sites in urban areas may have embedded structures such as utility lines and underground concrete structures, which cause difficulties in site investigation. This study is a preliminary research to establish knowledge base for developing an optimal technique for site investigation in urban areas. Surface-wave method and resistivity survey, which are frequently adopted for non-destructive site-investigation for geotechnical sites, were investigated to characterize effects of adjacent structures. In case of surface wave method, patterns of wave propagation were investigated for typical sets of multi-layered geotechnical profiles by numerical simulation based on forward modeling theory and field experiments for small-size model tests and real-scale tests in the field. In case of resistivity survey, 3-D finite element analyses and field tests were performed to investigate effects of adjacent concrete structures. These theoretical and experimental researches for surface-wave method and resistivity survey resulted in establishing physical criteria to cause interference of adjacent structures in site investigation at urban areas.

• Journal of Families and Better Life
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• v.14 no.2
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• pp.111-126
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• 1996

Debt was defined as all kinds of borrowings made by families in including credit card debt. The purpose of the study was to investigate the effects of family debt management on financial satisfaction. A model of debt management and financial satisfaction was developed based on the Deacon-Firebaugh's systems approach to family resource management and the variables comprising input throughput and output were based on the theoretical background asnd previous researches. Data were collected from 763 households' money managers residing in Seoul during Summer of 1995 and the statistical methods utilized included correlation coefficient multiple regression and path analyses. It was responded about 82% of the households had been indebted indicating the use of debt being a general way of living in this society. The results showed that financial satisfaction lowered with larger amount of monthly debt payment and with their uncertiainty regarding their capability to repay debt. The input which exerted direct effects on financial satisfaction were income asset financial expectations and family life cycle. And consumption demand on debt and easiness in extending credit had strong indirect effects on financial satisfaction via the throughput variables. The most powerful predictor of financial satisfaction via the throughput variables. The most powerful predictor of financial satisfaction was perceived difficulty in managing debt which was the instrumental output.

• Journal of Families and Better Life
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• v.32 no.4
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• pp.1-22
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• 2014

This study was focused on investigating the factors of the psychological adaptation of grandmothers raising their grandchildren. The Double ABCX family stress model provided the theoretical basis for this study, and the major factors examined in the study included a pile-up of stressors, family resources and social support, appraisal of situation(redefinition of nurturing), and adaptation(depressive mood and happiness). Data were collected by personal interview with 213 grandmothers raising their grandchildren utilizing the questionnaire survey method. Structural equation modeling analyses were performed and the results showed that a pile-up of stressors, the family resources(i.e., contact and emotional solidarity with grandchildren's parents), and the redefinition of nurturing had significant influences on the psychological adaptation of grandmothers raising their grandchildren. It was also found that social support had indirect influence on grandmothers' psychological adaptation. The redefinition of nurturing had the greatest effect on the participants' psychological adaptation, followed by a pile-up stressor, and then the family resources.