• Proceedings of the KSR Conference
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• 2003.10b
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• pp.552-556
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• 2003

Expansion joint is the absorbing structure when the upper structure of bridge have the drying shrinkage and creep from the change of temperature or construction badness. Because it has the fatigue from continuous vehicles traffic. the durability and performance is verified by the static and dynamic loading test In this study. we make the decision that T-MAT type expansion joint is applied in railway bridge and the expansion joint was tested by the criterion of Korea High Speed Rail Construction Authority.

• Journal of the Korea Safety Management & Science
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• v.13 no.1
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• pp.69-73
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• 2011

Questionnaire survey has been made for the above study. First, 65 question sheets have been distributed to railway operators and 55 sheets of them have been collected from them. SPSS 12.0 program package has been used to analyze those sheets concerning age, experience, school, background as a frequency analysis and t-test has been made to find out recognition level difference of a cheer response, depending on the operator's experience. T-verification has been made for two groups such as less than 10 years, and 10 years or more experience. Result from correlation analysis showed that there was no difference due to operators' experience.

• Journal of the Korea Safety Management & Science
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• v.16 no.4
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• pp.123-131
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• 2014

Modern weapon systems are getting more complex in terms of the functionality and also the conditions on the environment and range in which they are deployed and used. Therefore, many development programs can easily be exposed to a variety of risks, resulting in delayed schedules and cost overrun. As such, effective means are necessary to keep the defence budget at an affordable level while competitive edges on technological aspects are retained. As one way to meet those need, modeling and simulation (M&S) methods have widely been used, particularly in the test and evaluation (T&E) process for weapon systems development. The result of M&S-based systems development should be evaluated by the verification, validation & accreditation (VV&A) process to assure keeping reliability at a desired level. On the other hand, due to the explosiveness, the weapons systems development naturally requires to consider safety issues in both the T&E and operational periods. The purpose of this paper is to improve the VV&A process by reflecting the safety requirements therein. To do so, the VV&A process has been analyzed and graphically modeled first and then safety elements have been incorporated effectively. The use of the improved process in the war ships development has also been discussed. Based on the process proposed and the consequent database constructed, the target system can be expected to benefit from reducing development risks while assuring systems safety.

• The Korean Journal of Health Service Management
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• v.8 no.3
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• pp.157-168
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• 2014

The purpose of this study was to examine the effects of the Mindfulness Meditation program on sleep, depression and quality of life in the institutionalized elderly women. The study was a nonequivalent control group pretest-posttest design. The data was collected from March 7 to April 25 of 2014. Participants in the study were 56 elderly women, 30 institutionalized elderly for the experimental group and 26 institutionalized elderly for the control group. The experimental group received the Mindfulness Meditation program for 90 minutes/session/week for 8 weeks. Data were analyzed using x2-test and t-test for subject homogeneity verification, and paired t-test to examine the hypotheses. Mindfulness Meditation program experimental group showed significant differences in sleep score(t=-4.406, p=<.001), quality of life score(t=-8.799, p=<.001). However no significant differences were found between 2 groups for the scores on depression. According to the results the Mindfulness Meditation program was useful for improving on sleep and quality of life in the institutionalized elderly women.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.397-404
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• 2019

When developing a weapon system, a T&E(Test and Evaluation) can be performed using M&S for the test items that cannot be evaluated in the real world. In this case, the VV&A activities are required to prove the credibility of M&S for the T&E. Recently, the use of M&S has been increasing as the R&D trends of weapon systems are becoming more advanced. Therefore, the VV&A activities are also increasing. The VV&A activities aim to verify, validate, and accredit that the simulation can represent a real system and ensure credibility regarding its purpose and intention of use. VV&A activities are divided into V&V and Accreditation. When performing VV&A in the ADD (Agency for Defense Development), the V&V activities are performed by a separate department of the ADD and the accreditation activities are performed in the DTAQ (Defense Agency for Technology and Quality). This paper proposes a V&V process for a T&E of M&S that has been performed in ADD. The process is used to verify and validate the documents and data generated during the development process according to the accreditation criteria, and provides objective data that can be used to judge whether the accreditation decision and acceptance criteria are met.

• Korean Journal of Applied Biomechanics
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• v.22 no.2
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• pp.209-217
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• 2012

The purpose of this study was to develop a turn-type treatment program which applies the principle of spotting and a roll-type treatment program that induces off-vertical axis. 29 collegiate students volunteered for this study. 12-week treatment programs were applied to both 15 students for turn-type treatment group and 14 students for roll-type treatment group. As an analytic tool, eye camera was employed to verify the treatment programs for a stimulus upon a turn, recovery after a stimulus upon a turn, and nystagmus that affects a vestibular system. Two-way ANOVA with repeated measures was applied to see the significant differences between the treatment groups, and between the test periods. For Post-Hoc Test, paired t-test was used to within the group and independent t-test was used to between the groups. The results indicated that roll-type treatment training has maximized a stimulus on nystagmyus during the stimulus by a roll. Turn-type treatment training has maximized a stimulus on nystagmyus right after a stimulus by a roll and significantly decreased the intensity of nystagmyus during the recovery. Both turn and roll type treatments have reduced the recovery time which from nystagmyus to a normal status. Roll-type treatment has showed a much shorter recovery time for nystagmyus than the roll-type treatment has. Based on the results of treatment programs developed in this study, we expect the treatment programs can be applied to treat dizziness and to improve the function of vestibular system as a rehabilitation tool.

• Research in Community and Public Health Nursing
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• v.18 no.3
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• pp.373-381
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• 2007

Purpose: An exercise program, which was composed of motions simple and easy to follow, was developed and applied to aged women as a way to improve their health conditions. Method: To ascertain the effects of the exercise, which was conducted twice a week and 16 times in total for 8 weeks from September 10 to November 5, 2005 in two experimental groups (31 Persons) and a control group (31 persons), this study conducted quasi-experiments of nonequivalent control group pre-post test design. Data were analyzed using SPSS/PC Win 10.0, the reliability of the measuring tools using Cronbach's alpha, the verification of equivalence for general properties and dependent variables using Chi-square test and t-test, and the verification of hypotheses using t-test and ANCOVA. Results: After the exercise program. the aged women showed profitable evaluation of decisional balance, high feeling of self-efficacy as well as improved subjective awareness of health. Their diastolic blood pressure and total cholesterol were also reduced significantly after the exercise. Conclusion: After the conduct of the exercise program for 8 weeks, aged women showed increased profitable decisional balance, self-efficacy and subjective awareness of health. This suggests that continuous and proper exercise is effective as an intervention for health improvement for the aged as well as the prevention of and recovery from geriatric diseases.

• The Korean Journal of Elementary Counseling
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• v.6 no.1
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• pp.49-71
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• 2007

The purpose of this study was to examine the effects of a career group counseling program on the career maturity and achievement motivation of elementary school underachievers. This study targeted the fifth grader underachievers. Twenty underachievers, whose pre-test homogeneity in career maturity and achievement motivation was verified, were allocated to an experimental group and a control group by 10 underachievers each. The program was conducted for a total of 12 sessions, twice per week, and each session lasted 80 minutes. For verification of the program effects in this study, MANOVA and ANOVA were carried out for pre- and post-score tests between the groups, and repeated-MANOVA and paired t-test were peformed to look into the changes within a group by using SPSS/WIN(version 12.0) in terms of statistical analyses. The findings in this study are as follows: First, as a result of post test for the experimental and control groups, and difference verification of post and pre-tests within the experimental group, both career maturity and sub-factors of career maturity demonstrated significant differences. Second, as a result of difference verification of the pre- and post-tests within the experimental group, achievement motivation significantly improved, but there was no statistically significant difference in achievement motivation in the post-test of experimental and control groups. However, of the sub-factors of the achievement motivation, self-confidence and Interest in the long-term future significantly improved. Third, we can see that the career group counseling program provided opportunities for the underachievers to search their own character, interest, and aptitude, and broadly encounter the world of occupations. Also, we can infer that the underachieves had active and developmental attitudes towards future dreams and their current efforts. As noted above, the career group counseling program proved that it has a positive effect to the improvement of the elementary school underachievers' career maturity and achievement motivation in some variables.

• Child Health Nursing Research
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• v.18 no.4
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• pp.192-200
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• 2012

Purpose: This study was done to develop and test the effectiveness in late school-aged children of a healthy lifestyle education program for cancer prevention. Methods: Participants were 26 students in the sixth grade of N elementary school in J City (experimental group) and 25 students in the sixth grade of D elementary school with same educational conditions (control group). The research design was a nonequivalent control group pretest-posttest design. Data collection and execution of the study were carried out from March 10 to May 19, 2011. For the experimental treatment, 7 weekly sessions of the healthy lifestyle education program for cancer prevention were given by the researcher. Posttest was done immediately following the conclusion of the program and 4 weeks later. Frequencies, percentages, ${\chi}^2$-test, t-test, repeated measures ANOVA and paired t-test with SPSS WIN 18.0 were used to analyze the data. Results: Perceived barriers, perceived self-efficacy, activity related effect and family support significantly influenced cancer prevention knowledge and increases in healthy life styles. Conclusion: Results indicate that, as this program for cancer prevention was effective in increasing healthy lifestyle practices in these children, there is a need to further develop, test and implement programs in all schools.

• Journal of Internet of Things and Convergence
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• v.6 no.1
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• pp.97-102
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• 2020

Multi-Channel Switch ICs for IoT have integrated several solid state structure low ON-resistance bi-directional relay MOS switches with level shifter to drive high voltage and they should be independently controlled by external serialized logic control. These devices are designed for using in applications requiring high-voltage switching control by low-voltage control signals, such as medical ultra-sound imaging, ink-jet printer control, bare board open/short and leakage test system using Kelvin 4-terminal measurement method. This paper describes implementation of analog switch control block and its verification using Field programmable Gate Array (FPGA) test pattern generation. Each block has been implemented using Verilog hardware description language then simulated by Modelsim and prototyped in a FPGA board. Compare to conventional IC, The proposed architecture can be applied to fields where multiple entities need to be controlled simultaneously in the IoT environment and the proposed pattern generation method can be applied to test similar types of ICs.