• Women's Health Nursing
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• v.5 no.1
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• pp.51-64
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• 1999

Dance movement program. Psychological wellbeing, Middle aged women, Wellbeing with depression tendency, 율동적 동작 프로그램, 우울성향 중년여성 %600an This study was designed to confirm the effects of the Dance Movement Program on psychological health in middle-age women with depression tendency. 67 women with mile to moderate depression scoring between 16-25 were selected among 235 responded to CES-D (Radloff, 1977, Cho and Kim, 1993). The 46 volunteered to participate in the study were assigned the control. 7 attritions occurred during the course of the experiment leaving thirty-nine subject : nineteen experimental and twenty control, for the final analysis. Research subjects revealed to be homogenous demographically and by health-related variables. The 50-minute Dance Movement Program was performed by the experimental group 3 times a week for eight weeks, from October 6 to November 29, 1997. Depression, life satisfaction, self efficacy were measured before and after the course of Dance Movement Program. Plasma serotonin was measured to identify its relationship with depression, Homogeneity tests revealed satisfactory level on relevant research variables. Data were analyzed by $x^2$-test, paired and unpaired t-tests. The results are as follows : 1) The hypothesis that depresson score of experimental group will decreased than control group was supported by t-test(t=2.20, P=.0021) 2) The hypothesis that life satisfaction score of experimental group will increased than control group was supported by t-test(t=1.42, P=.0049). 3) The hypothesis that self-efficacy score of experimental group will increased than control group was not supported by t-test(t=6.20, P=.0616). 4) The hypothesis that level of plasma serotonin will increased than control group was not supported by t-test(t=1.88, P=.0524) Thus, the effects of the Dance Movement Program for the improvement of psychological health gram for the improvement of psychological health for the middle-aged women with depression tendency are scientifically confirmed by this study.

• Journal of Physiology & Pathology in Korean Medicine
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• v.18 no.6
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• pp.1938-1944
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• 2004

In this study, when we make a diagnosis of constitution using QSCC Ⅱ(Questionnaire of Sasang Constitution Classification). data mining techniques are applied to seek the classification function for improving the accuracy. Data used in the analysis are the questionnaires of 1051 patients who had been treated in Dong Eui Oriental Medical Hospital and Kyung Hee Oriental Medical Hospital. The criteria for data cleansing are the response pattern in the opposite questionnaires and the positive proportion of specific questionnaires in each constitution. And the criteria for variable selection are the test of homogeneity in frequency analysis and the coefficients in the linear discriminant function. Discriminant analysis model and decision tree model are applied to seek the classification function into Sasang constitution. The accuracy in learning sample is similar in two models, the higher accuracy in test sample is obtained in discriminant analysis model.

• Journal of Information Technology Applications and Management
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• v.23 no.2
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• pp.225-238
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• 2016

The purpose of this study is to develop cyber class contents on website and to verify the effectiveness of the program to reinforce a career education. The participants of the experiment in this study are from Namseoul University who took the cyber class 'Self management and creation of vision.' of the second semester in 2015. They took the class fifty-sixty minutes a week. The control group also includes the students who took the classes 'Theory and practice of school violence prevention' and 'Youth Education theory.' To verify the effectiveness of career education, the data processing in performing this study utilized t-test for homogeneity with the effective variable of career identity and career decision and the result was proved by using paired t-test. The result suggests that the experiment group significantly shows improvement compared with the control group in the view of career identity and career decision level. Therefore we recognize that the web based cyber course has its effect on content development and career education and we anticipate the continuous development and activation of effective cyber education on website for university students in future.

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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• v.5 no.4
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• pp.64-70
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• 1994

the magnetic field homogeneities of the induction coils of various sizes and shapes were investigated in order to prepare for the magnetic field immunity test under the power frequency, the pulse and the damed oscillatory fields recommended by the IEC. For this purpose, we analyzed the magnetic field homogeneities in the two induction coils with $1m\times1m$, and $1m\times2.6m$, , and the double square coils with 0.8m and 0.6m spaced. The testing volume within $\pm$3dB in the double square coil with 0.8m spaced in twice bigger than single square coil with 1m side in the z-direction.

• Journal of Korean Clinical Nursing Research
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• v.14 no.1
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• pp.173-185
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• 2008

Purpose: The purpose of this study was to identify the effects of multimedia educational program of the prevention of respiratory disorders on knowledge and behavior of preschool children. Method: The research design used a nonequivalent control group pre-posttest. 32 subjects in the control group received no intervention, 33 subjects in experimental group received a multimedia educational program that consists of video, named 'The strong girl and weak girl', 5 different picture boards, method of hand washing, tooth brushing, and reinforcement. The data were analyzed by using $x^2$-test and t-test for determining of homogeneity and testing the hypothesis. Results: There were significant increases in knowledge and behavior in the experimental group compared to the control group. Conclusion: From the results of this study, the multimedia educational program significantly increased knowledge and behaviors of preschool children for preventing respiratory disorders. These findings suggest that a multimedia educational program can be used as an efficient nursing intervention of preschool children for preventing respiratory disorders.

• Korean Journal of Metals and Materials
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• v.47 no.7
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• pp.397-405
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• 2009

The high strain rate deformation behavior of ultra-fine grained 5083 aluminum alloys prepared via equal channel angular (ECA) extrusion was investigated in this study. The microstructure of ECA extruded specimens consisted of ultra-fine grains, and contained a considerable amount of second phase particles, which were fragmented and distributed homogeneously in the matrix. According to the dynamic torsion test results, the maximum shear stress and fracture shear strain of the route A (no rotation) specimen were lower than those of route C ($180^{\circ}$ rotation) specimen since that adiabatic shear bands of $100{\mu}m$ in width were formed in the route A specimen. The formation of adiabatic shear bands was addressed by concepts of critical shear strain, deformation energy required for void initiation, and microstructural homogeneity associated with ECA operations.

• Elastomers and Composites
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• v.56 no.3
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• pp.124-135
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• 2021

Evaluating service lives of rubber materials at certain temperatures requires a destructive method (typically using elongation at break). In this study, a non-destructive method based on hardness change rate was proposed for evaluating the service life of chloroprene rubber (CR). Compared to the destructive method, this non-destructive method ensures homogeneity of CR specimens and requires a small number of samples. Thermal accelerated degradation test was conducted on the CR specimens at 55, 70, 85, 100, and 125℃, and the tensile strength, elongation at break, and hardness were measured. The results of the experiment were compared to those of the accelerated life evaluation method proposed in this study. Comparing the analyzed lives in the high temperature region (70, 85, 100, and 125℃), the difference between the service lives for the destructive method (using the elongation at break) and non-destructive method (using the hardness) was approximately 0.1 year. Therefore, it was confirmed that the proposed non-destructive evaluation method based on hardness changes can evaluate the actual life of CR under thermally accelerated degradation conditions.

• Journal of Powder Materials
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• v.3 no.4
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• pp.253-259
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• 1996

The efficiency of thermoelectric devices for different applications is known to depend on the thermoelectric effectiveness of the material which tends to grow with the increase of its chemical homogeneity. Thus an important goal for thermal devices is to obtain chemically homogeneous solid solutions. In this work, the new process with rapid solidification (melt spinning method) followed by hot pressing was investigated to produce homogeneous material. Characteristics of the material were examined with HRD, SEM, EPMA-line scan and bending test. Property variations of the materials were investigated as a function of variables, such as dopant ${CdCl}_{2}$ quantity and hot pressing temperature. Quenched ribbons are very brittle and consist of homogeneous $Bi_2Te_3$, ${Bi}_{2}{Se}_{3}$ solid solutions. When the process parameters were optimized, the maximum figure of merit was 2.038$\times$$10^{-3}K^{-4}. The bending strength of the material hot pressed at 50$0^{\circ}C$ was 8.2 kgf/${mm}^2$.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2011.11a
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• pp.77-78
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• 2011

This paper presents a basic study which is to develop concrete cylinder moulds for a proficiency testing compressive strength of concrete among laboratories accredited Korea Laboratory Accreditation Scheme(KOLAS). The concrete cylinder moulds sufficiently have homogeneity for a proficiency testing which is a means of assessing the ability of laboratories to competently perform specific test and measurements. The concrete compressive strength specimens placed different consolidation methods were analyzed by a statistic technique. The methods of consolidation are rodding, and internal or external vibration.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.24 no.6
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• pp.647-652
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• 2015

A probe pin is a key component of LED inspection equipment. The probe pin makes contact with the LED electrodes and supplies an electric current. Because the mechanical and electrical homogeneity of the probe surface affects the service life and reliability, its characterization is essential. For this study, the hardness was measured using a micro-Vickers hardness test. Moreover, the thicknesses of the plating at different locations and the elemental compositions were examined using an FE-SEM. The uniformity of the plating was found to be acceptable because palladium was detected consistently throughout the tested domain. In addition, the hardness of the surface was determined to be higher than that of the typical palladium range, which is attributed to the use of undercoated nickel.