• Journal of Power System Engineering
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• v.17 no.6
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• pp.108-114
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• 2013

This paper describes process optimization for thermal-sprayed Co-based self-flux alloy coating by Taguchi method. Co-based self-flux alloy coatings were fabricated according to $L_9(3^4)$ orthogonal array using flame spray process. Hardness test and wear test were performed, the results were analyzed by analysis of variance(ANOVA) considering a multi response signal to noise ratio(MRSN). From the results of ANOVA, the optimal combination of the flame spray parameters on Co-based self-flux alloy coating could be predicted. The calculated hardness and wear rate of the coatings by ANOVA were found to be close to that of confirmation experimental result.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.16 no.2
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• pp.135-141
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• 2017

An experimental study of micro blasting for a rotating aluminum rod was conducted through the statistical analysis of ANOVA to obtain the effect of blasting conditions. The rotating equipment was designed and constructed with forward and backward moving for helical blasting, but rotation was used in this study. The blasting condition factors were the type of abrasive particle, nozzle diameter, pressure, standoff distance, injection time, etc. The width of the surface, the maximum depth of the sprayed surface, and ANOVA were analyzed by statistical analysis. The results showed that the contributions of the main factors were pressure, nozzle diameter, and injection particle.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.862-865
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• 2000

The object of this paper is to evaluate the surface roughness using the experimental equation of surface roughness, which is developed in turning by an orthogonal array method. $L_9{3^4}$ orthogonal array method, one of fractional factorial design has been used to study effects of main cutting parameters such as cutting speed, feed rate and depth of cut, on the surface roughness. And the analysis of variance (ANOVA)-test has been used to check the significance of cutting parameters. Using the result of ANOVA-test, the experimental equation of surface roughness, which consists of only significant cutting parameter - feed rate, has been developed. The coefficient of determination of this equation is 0.962.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.10 no.6
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• pp.16-21
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• 2011

In machining operation, the quality of surface finish is an important factor for many turned products. In this paper, surface quality in turning machining considering angle variation has been investigated. To reach this goal, surface quality turning experiments are carried out according to cutting conditions with angle variation. The variable cutting conditions are cutting speed, feed rate and taper angle of workpiece. The surface roughness was measured and the effects of cutting conditions were analyzed by the method of analysis of variance (ANOVA). From the experimental results and ANOVA, it is found that a better surface roughness can be obtained as decreasing feed rate, increasing cutting speed. Taper angle variation has been more influenced by feed rate and cutting speed.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.11 no.5
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• pp.105-115
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• 2016

The purpose of this study was to analyze the influencing relationships among the preparation for the old age, social networks, and the enterpreneurial intention of the potential enterpreneurs. 305 numbers of structured questionnaires were collected from the potential enterpreneurs and analyzed through SPSS WIN 21.0 using frequency, validity test, t-test, ANOVA, and regression analysis. The result are as follows. Firstly, the effects of the emotional and economical preparation for the old age on the entrepreneural intention of the potential enterpreneurs were shown as negative. Secondly, the social networks affects the enterpreneural intention of the potential enterpreneurs negatively.

• Journal of the Korea Convergence Society
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• v.6 no.4
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• pp.197-203
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• 2015

The purposes of this study were to analyze how effects of parental monitoring, parental affection, inconsistency in parenting attitudes on adolescents' school adjustment and intervention to help adolescents school adjustment. Korea Youth Policy Institute to achieve the research objectives, 'Korea Child Youth Panel Survey'(KCYPS 2010) using data from the First year 1 data were analyzed by Descriptive Statistic, t-Testing, ANOVA and Multiple Regression Analysis. The results of the study are as follows. parenting attitudes were an independent variable having a partially significant effect on middle school students' school adjustment. As a results, The level of parental monitoring and affection are high, the level of middle school students' school adjustment gets higher. On the contrary, the level of parents' inconsistency are high, the level of middle school students' school adjustment gets lower. Therefore, it is necessary to research various options to develop promoting positive parenting attitude in order to increase the level of the middle school student's school adjustment

• The Journal of the Korea Contents Association
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• v.13 no.12
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• pp.463-469
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• 2013

In this study, I examine whether differences in the levels of stress exist with regard to the police department size. To accomplish this, a way ANOVA analysis of variance(One-way ANOVA) was conducted. As a result, a significant difference was found in Job stress and traumatic stress according to the department size and grade. Specifically, first, in the job stress level on the department size, the smaller department size was, the higher job stress level was and the bigger department size was, the lower job stress level was. Second, in the traumatic stress level on the department size, the smaller department size was, the higher traumatic stress level was and the bigger department size was, the lower traumatic stress level was. Third, in the job stress level on the department grade, the lower department grade was, the lower job stress level was and the higher department grade was, the higher job stress level was. Fourth, in the traumatic stress level on the department grade, the lower department grade was, the lower traumatic stress level was and the higher department grade was, the higher traumatic stress level was.

• Journal of Digital Convergence
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• v.14 no.4
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• pp.315-324
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• 2016

This study, investigating the differences of public hospital employees' communication, motivation, mutual trust, working conditions, fair compensation, job satisfaction, is to identify the factors affecting organizational performance. Through this, an alternative is suggested, which can maximize organizational performance of hospital employees. The period was from October 5 to October 31, 2014 to collect the data from 232 subjects working in public hospitals. ANOVA and regression analysis were conducted and the finding shows that communication, motivation, mutual trust, working conditions, fair compensation, job satisfaction have a significant difference (p<0.05) based on job categories. In addition, the factors affecting organizational performance were communication and fair compensation (p<0.001) for nursing job, age and employment type (p<0.05) and fair compensation (p<0.001) for Medical Support, motivation and fair compensation (p<0.001) for administrative job. The efforts to improve human resource management in their organization which is able to inspire a sense of belonging should be followed.

• The Journal of the Korea Contents Association
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• v.12 no.9
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• pp.211-216
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• 2012

In this study, the relationship between the organizational characteristics of police officers and the level of post-traumatic stress disorder in the comparative analysis was to check for post-traumatic stress disorder, according to the organizational characteristics affect. To accomplish this, a way ANOVA analysis of variance(One-way ANOVA) was conducted. The department in post-traumatic stress disorder level, a significant difference was found. It was more likely to be exposed to a traumatic experience if who is working in the front-line department. Post-traumatic stress disorder according to the work unit, a significant difference was found. The level of Post-traumatic stress disorder in outside job unit officers was higher than that of desk job unit offcers. Post-traumatic stress disorder according to the rank and duration of employment and the administrative district level, a significant difference was not found.

• Journal of Korean Library and Information Science Society
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• v.36 no.2
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• pp.307-325
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• 2005

The paper examined and analyzed the factors affecting TQM in Medical libraries. The questionnaire was used for collecting data and the ANOVA and T-TEST were used for analyzing data. The results showed that librarians positively recognize the need of TQM in Medical libraries. However, the results showed that library system needs to improve the reward system for effective performance of the work. Finally, this study showed that librarians need to be well-qualified person as a professional with the CEO of strong leadership for successful TQM.