• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.8-14
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• 2016

When Open Source Projects are processed by multiple developers, the Version Control Systems, which control the different versions of the same file being used, is a very useful tool. On the other hand, because most of conventional VCS(SVN, Git, etc.) mainly control the history of the modifications of the source codes or documents, there is an inconvenience that each developer should modify the development environment whenever the development environment is modified. To overcome this inconvenience, this paper suggests a scheme of VC for OSP. The basic concept of the suggested scheme is that an image, including the development environment and controls, is created as a new version using the Docker, virtualization tool of the container method. To review the functional appropriateness of the suggested scheme, after establishing the Docker on the hosts that use the different OS( Ubuntu12.0.4, CentOS7), this study tested a VC that could control the different versions including the history of modifications of the development environment and evaluated them by a comparison with the conventional VCS. The results show that the suggested scheme is a convenient scheme of VC for the OSP.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.25 no.1
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• pp.20-27
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• 2014

Objectives : The aim of this study was to determine whether intervention using a multidisciplinary approach affects maternal mental health, parenting stress, and sense of parenting competence in children with feeding disorder and failure to thrive (FTT). Methods : Children with feeding disorder and FTT were randomized to the intervention group (N=11) or control group (N=8). We administered the Korean standardization of Parent Temperament Questionnaire for Children (K-PTQ) in both groups before intervention, and the Korean version of the Parenting Stress Index-Short Form (K-PSI-SF), Korean version of the Parenting Sense of Competence (K-PSOC), Korean version of the Beck's Depression Inventory (K-BDI), Korean version of the Beck Anxiety Inventory (K-BAI), and Korean version of the Mood Disorder Questionnaire (K-MDQ) in both groups before and after the intervention. Results : In the intervention group, the K-BDI (p=.068), K-BAI (p=.068), and K-MDQ (p=.066) scores tended to show a decline, the K-PSI-SF scores for stress related to child learning showed a significant decline, and the K-PSOC scores for sense of parenting competence showed significant improvement. However, no significant changes were observed in the control group. Conclusion : Use of a multidisciplinary approach improved maternal mental health, parenting stress, and sense of competence. Comparison of these results with those of normal control will be necessary in a future study.

• Research in Community and Public Health Nursing
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• v.11 no.1
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• pp.199-208
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• 2000

The purpose of this study is to test the psychometric properties of the Korean version of the Health-Related Hardiness Scale(HRHS) in a sample of Korean nursing students. The korean version of HRHS was administered to 234 nursing students including 135 college students and 99 university students. The Korean version of HRHS was measured on a 6 Likert scale, assessing three factors of HRHS : control, commitment, and challenge. Internal consistency was used to test the instrument's reliability. The internal consistency of the scale was measured using a coefficient alpha. The coefficient alpha was .69(control), .49(commitment). and .69(challenge), Item analysis and confirmatory factor analysis (CFA) were used to test the instrument's construct validity. The item analysis identified that there were 13 items. which were lower than the .25 item-total correlation. CFA revealed that the scale's fadoral validity was not proper by showing unfit indices(RMSEA .07. stand, RMR .09. GFI .71). According to the findings of this study, the reliability and construct validity of the Korean version of HRHS is not satisfactory in the sample of nursing students. As a result. the researcher modified the scale through item analysis and repetitive CFA process, and proposed the revised 25-item Korean version of HRHS for nursing students. The revised scale's reliability(control .74, commitment .73. challenge .77) and factorial validity were within acceptable levels. The item analysis identified that there was no item, which is lower than the .25 item-total correlation. CFA revealed that the scale's factoral validity was proper by showing fit indices(RMSEA .08 stand. RMR .08. GFI .80).

• Korean Journal of Culture and Social Issue
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• v.17 no.1
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• pp.63-79
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• 2011

The purpose of the present study is to examine effects of anger expression and perceived emotional competence on school anger in adolescents. The participants were 304 high school students (134 males, 170 females). They were administered the anger-related subscales (anger-out, anger-in, and anger control) of the Korean Version of the State-Trait Anger Expression Inventory (STAXI-K), the Korean Version of Trait Meta-Mood Scale (K-TMMS), and the Korean Version of School Anger Inventory(SAI-K). The results showed that school anger positively correlated with anger-out and anger-in, and negatively correlated with anger control and perceived emotional competence. Neither interaction effects of anger-out and perceived emotional competence nor interaction effects of anger-in and perceived emotional competence on school anger were significant. On the contrary, interaction effects of anger control and perceived emotional competence on school anger were significant. The results of post-hoc analysis revealed that the effect of anger control on school anger was significant in the case of high perceived emotional competence but not significant in the case of low perceived emotional competence. Based on these results, it was suggested that psychological programs designed to reduce school anger in adolescents need effective measures to enhance not only anger control skills but also perceived emotional competence.

• Journal of the Korean Society of Physical Medicine
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• v.15 no.1
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• pp.33-42
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• 2020

PURPOSE: This study examined the effects of a whole body vibration-exercise program on the muscle strength, balance, and falling efficacy of super-aged women. METHODS: Thirty participants, who are over 75 years of age, were recruited. They were assigned randomly to an experimental group (n=15), which received whole body vibration exercise, and a control group (n=15), which received an exercise program that did not include vibration. The interventions lasted for four weeks, three times a day, and 25 minutes per session. To compare the effects of the intervention, a 30-second chair stand test (CST), Korean version of Berg balance scale (K-BBS), functional reach test (FRT), timed up and go test (TUG), and Korean version of the falls efficacy scale (K-FES) was used. RESULTS: The experimental group showed a significant increase (p.<05) before and after the intervention in the chair stand test (CST), Korean version of the Berg balance scale (K-BBS), functional reach test (FRT), timed up-and-go (TUG), and Korean version of the fall efficacy scale (K-FES). Compared to the control group, the experiment group showed a more significant increase (p.<05) in the CST, K-BBS, and FRT. CONCLUSION: A whole body vibration exercise program could be suggested as an effective intervention method for muscle and balance strengthening for super-aged women.

• Journal of Institute of Control, Robotics and Systems
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• v.15 no.5
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• pp.488-495
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• 2009

This paper presents a fast feature extraction method for autonomous mobile robots utilizing parallel processing and based on OpenMP, SSE (Streaming SIMD Extension) and CUDA programming. In the first step on CPU version, the algorithms and codes are optimized and then implemented by parallel processing. The parallel algorithms are debugged to maintain the same level of performance and the process for extracting key points and obtaining dominant orientation with respect to key points is parallelized. After extraction, a parallel descriptor via SSE instructions is constructed. And the GPU version also implemented by parallel processing using CUDA based on the SIFT. The GPU-Parallel descriptor achieves an acceleration up to five times compared with the CPU-Parallel descriptor, but it shows the lower performance than CPU version. CPU version also speed-up the four and half times compared with the original SIFT while maintaining robust performance.

• Journal of IKEEE
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• v.15 no.2
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• pp.149-156
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• 2011

In this paper, a new discrete variable structure controller based on a new sliding surface and discrete version of the disturbance observer is suggested for the control of uncertain linear systems. The reaching phase is completely removed by introducing a new proposed sliding surface. The discrete version of the disturbance observer is derived for the effective compensation of the effect of uncertainties and disturbances. A corresponding control input with the disturbance compensation is selected to guarantee the quasi sliding mode on the predetermined sliding surface for guaranteeing the designed output in the sliding surface from any initial condition to the origin for all the parameter variations and disturbances. By using Lyapunov function, the closed loop stability and the existence condition of the quasi sliding mode is proved. Finally, an illustrative example is presented to show the effectiveness of the algorithm.

• Journal of the Korean Society for Railway
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• v.12 no.6
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• pp.1043-1048
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• 2009

PES (Programmable Electronic System) is used by software development for the train control system. PES has been widely used in real world and consists of hardware, firmware and application software. The PES are easily apply to many applications because its implementation has high flexibility. Many safety critical functions are realized through software in safety critical system. Normally, it is difficult to detect failures for PES system because the PES is too sophisticated to identify sources of the failure. So, the reliability analysis is needed by using software fault tolerance techniques. Currently, there are the recovery block, distributed recovery block, N-version programming, N self-checking programming in fault tolerance techniques. In this paper, the models of recovery block and N-version programming in software fault tolerance techniques are suggested by using the Markov model. Also, the reliability in the train control system is analyzed through changing time. The fault occupancy rates of the program, adjustment test and voter are stationary. So, the relation between time and reliability is presented by using Matlab program. In the result of reliability, the reliability of recovery block is more high than N-version programming in case of the same number of substitution block.

• Computational Structural Engineering
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• v.5 no.3
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• pp.97-103
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• 1992

Since many design problems in the railroad, aerospace and machine structures involve considerations of the effect of cyclic loading, manufacturing and quality control processes much fully account for fatigue of critical components. Due to the sensitivity of the Paris law, it is very important to calculate .DELTA.K numerically to minimize the error of predicted fatigue life in cycles. However, it is shown that the p-version of FEM based on LEFM analysis is far better suited for computing the stress intensity factors than the conventional h-version. To demonstrate the proficiency of the proposed scheme, the welded T-joint with crack problems of box car body bolster assembly and a crack problem emanating from a circular hole in finite strip have been solved.

• Geophysics and Geophysical Exploration
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• v.24 no.2
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• pp.45-52
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• 2021

With advancements in software technology, more scientists and engineers are employing computer software and programming tools for research. However, several issues can arise in software-based research: environment setting, reproducibility, and loss of source codes. This study investigates the use of Linux containers and version control systems to prevent these problems. Managing research projects using a cloud source-code repository and building a research environment in a Linux container can prevent the abovementioned problems and make research collaboration easier. For researchers with no experience with Linux containers, a repository of project template containing shell scripts for building and running containers has been released.