• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.7
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• pp.916-922
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• 2018

Recently, power plant effluent condensers received a Renewable Energy Certificate as components of hydrothermal energy (weighted 1.5 times) as one target item of the Renewable Portfolio Standard (RPS) policy. Accordingly, more attention is being paid to the value of thermal wastewater as a heat source. However, for utilization of thermal wastewater from power plants in high-turbidity areas like the West Sea of Korea, a turbidity reducing system is required to reduce system contamination. In this study, an experimental test was performed over a month on thermal wastewater from power plants located in the West Sea of Korea. It was found that water turbidity was reduced by more than 80 % and that the concentration of organic materials and nutrient salts was partially reduced due to the reduction of floating/drifting materials. To conduct a comparative analysis of the level of contamination of the heat exchanger when thermal wastewater flows in through a turbidity reducing system versus when the condenser effluent flows in directly without passing through the turbidity system, we disassembled and analyzed heat exchangers operated for 30 days. As a result, it was found that the heat exchanger without a turbidity reducing system had a higher level of contamination. Main contaminants (scale) that flowed in to the heat exchanger included minerals such as $SiO_2$, $Na(Si_3Al)O_8$, $CaCO_3$ and NaCl. It was estimated that marine sediment soil flowed in to the heat exchanger because of the high level of turbidity in the water-intake areas.

• Journal of Convergence for Information Technology
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• v.9 no.9
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• pp.13-19
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• 2019

This paper analyzed the SCMS and pilot policy, which is pursued by the U.S. government in connected vehicles. SCMS ensures authentication, integrity, privacy and interoperability. The SCMS Support Committee of U.S. government has established the National Unit SCMS and is responsible for system-wide control. Of course, it introduces security policy, procedures and training programs making. In this paper, the need for SCMS to be applied to C-ITS was discussed. The structure of the SCMS was analyzed and the U.S. government's filot policy for connected vehicles was discussed. The discussion of the need for SCMS highlighted the importance of the role and responsibilities of SCMS between vehicles and vehicles. The security certificate management system looked at the structure and analyzed the type of certificate used in the vehicle or road side unit (RSU). The functions and characteristics of the certificates were reviewed. In addition, the functions of basic safety messages were analyzed with consideration of the detection and warning functions of abnormal behavior in SCMS. Finally, the status of the pilot project for connected vehicles currently being pursued by the U.S. government was analyzed. In addition to the environment used for the test, the relevant messages were also discussed. We also looked at some of the issues that arise in the course of the pilot project.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.37 no.2
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• pp.43-54
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• 2014

Environmental pollution including air, land, and water has become one of the most critical issues in global interest. The damages due to environmental pollution lead to serious disasters. Nations have realized the importance of environment protection and have been starting to force organizations to implement environmental management system (EMS) as way of protecting environment. ISO 14001 requirements that are the most popular standard as EMS have been developed to support continuous improvement to environment management. It has been revised once since publication and ISO 14001 : 2004 version is currently available. Organizations globally started to acquire the certificate of EMS to observe environment related laws, accept customers' and stakeholders' request, increase market share, and fulfill implementation motives. This article examines the audit data that were collected for several years from manufacturing companies including shipbuilding, machinery, metal, automobiles, and chemical companies in southeastern Korea on the basis of ISO 14001 : 2004 requirements. The audit data were classified into minor nonconformities based on factors such as business size, business type, and EMS implementation period. We conduct hypotheses test using statistical methods in order to see if there are any significant differences based on the factors. We draw conclusions for the results of hypotheses test and address the necessities of energy, greenhouse gas, green management, and continuous improvement to enhance the efficiency of EMS implementation.

• Journal of Sasang Constitutional Medicine
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• v.25 no.4
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• pp.320-329
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• 2013

Objectives We carried out this study to know that there is any differences on the health condition of the middle aged women between Sasang coustitution. We used Diagnosis System of Oriental Medicine(DSOM) for diagnosis and determining pattern identification. Methods This research was approved by the Dongeui University Oriental Hospital Institutional Review Board (certificate no. 2011-06). From March 2012 to October 2012, we examined Kupperman's index, the MENQOL, DSOM, and Sasang Constitution of 291 women from the general population, with ages ranging from 40 to 60 years. And we compared the results statistically by the chi-square test and F-test. Results and Conclusions We excluded 4 Taeyangin to analyze because they were few, and analyzed 287 subjects which were 53 Soyangin, 131 Taeeumin, and 103 Soeumin. 1. The pathogenic factors that showed significant differences were deficiency of qi, insufficiency of Yin, heat on the frequency of the output and deficiency of qi, heat, phlegm on the mean of pathogenic factor score. Deficiency of qi was higher in Soeumin, insufficiency of Yin and heat were higher in Taeeumin, and phlegm was higher in Taeeumin and Soeumin. Overall, Soyangin tended to be lower than others on both the frequency of the output and the mean of pathogenic factor score. 2. The middle aged women with ages ranging from 40 to 60 years tended to be dryness, kidney, damp and became to be blood-deficiency, stagnation of qi, heart easily. Soyangin was more health than others, Taeeumin tended to be heat, phlegm, insufficiency of Yang, and Soeumin tended to be deficiency of qi.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.12
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• pp.6146-6154
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• 2013

This study examined the status on job satisfaction and job performance of Advanced Practice Nurses (APNs) in Korea. The data was obtained from the 2009 APNs' job satisfaction survey of 452 nurses who received the certificate of APN between 2005 and 2008 conducted by the Korean Accreditation Board of Nursing Education. ANOVA and t-test analyses using SPSS version 14.0 were performed. The average job satisfaction level of the APNs was 2.94 out of 5.00. APNs who were performing jobs as a certified APN had a higher level of job satisfaction (t=.23, p<.001), higher wages (t=2.23, p<.05), promotion in rank (t=2.56, p<.05), more professional job performance (t=10.52, p<.001), greatest trust in their bosses and coworkers (t=5.31, p<.001), and higher confidence in their job performance (t=5.07, p<.001) than those who were not. The government and the nursing community need to provide the APNs' with the appropriate supply and demand polices, as well as a proper incentive system and job improvement.

• Journal of the Korea Convergence Society
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• v.10 no.12
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• pp.235-242
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• 2019

The present paper aims to examine how prospective teachers' experience of creating UCC materials affects their teaching expertise and creativity. The group of subjects consists of a group of 19 students majoring in Japanese under the teacher certificate curriculum at N University located in Cheonan. The collected data was analyzed using a set of statistical methods including frequency analysis, descriptive statistics, correlation analysis, Wilcoxon Signed Rank Test using SPSS WIN 21.0. It was found that there was a positive correlation between their UCC experiences and their teaching subject expertise/creativity. It was also found that the former exerted a statistically significant effect on the latter. The results of the current research might suggest that teachers' teaching methods in the field are very important. It is hopeful that innovative teaching methods and activities will be introduced and expanded in the filed to produce more effective education.The Korea Convergence Society.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.1
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• pp.163-172
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• 2017

This study is a system that provides a suitable level of the problem, designing the learner certification simulation program based on the ITS(: Intelligent Tutoring System) based on the model and the learning expert model, the model through a buggy (Buggy Model). In the demand survey that reflects the needs of users, convenience, effectiveness, scalability, and reliability were required. In order to reflect this, various problems were developed, problem type analysis, difficulty control, student grades and level management. Users who are preparing for the certification test are expected to use the development system to solve the problems according to their own level and to solve various types of problems in a practical environment to greatly shorten the preparation period for certification.

• The Korean Journal of Community Living Science
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• v.20 no.2
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• pp.263-274
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• 2009

The objective of this study is to verify work satisfaction of school food-service employee, of their job characteristics. Subjects were comprised 9 elementary schools, 11 middle schools, and 3 high schools in Ansan city. Data were analyzed 203 questionnaires for frequency, means, one-way ANOVA, $Scheff{\acute{e}}$ test, t-test, and Pearson correlation using SPSS PC Package. Most of the respondents were high school graduate(91.1%), under one million won salary(41.9%), and non license holder(60.6%). Working conditions were part-time job(41.9%), unlimited contractors(51.2%), and 3-5 years of working experience(21.7%). Measure of overall job satisfaction by Likert-type 5 scale, satisfaction of work operation attitude was 3.55 points and work characteristic duty of 4.32 points. The certificate qualified and elementary school's working posture were more satisfied their work attitude than other groups(p<0.05). Salary satisfaction score showed 2.64 points, but the work esteem satisfaction showed 3.34 points. The factor of working circumstance and potentiality satisfaction was only 2.61 points, but interpersonal connection and communication satisfaction was 3.50 points. Between job satisfactions factors, they were highly correlated with each other. The pride and characteristic duty of the work showed the strongest correlated(p<0.001). The satisfaction score of work operation attitude were significantly correlated with characteristic duty(p<0.001), work esteem, interpersonal relationships and communication(p<0.01). With this results, work satisfaction of food service employees showed a relatively high to perform a job task characteristics and work attitudes. However, the working environment and growth in salaries satisfaction were low. A set of duties must be paid according to the labor intensity. As removing the disturbing factors, the improvement in the quality of the feed will be able to expect substantial effects.

• The Journal of the Korea Contents Association
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• v.15 no.12
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• pp.624-639
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• 2015

This study was conducted as experimental research for testing the effects of a brain dance group program for cultivating human qualities on pre early childhood care teachers' self acceptance and self control. The subjects of this study were 20 students in the course for early childhood care teacher certificate at N University in G City who consented to participate in this study. and they were divided randomly into an experimental group n=10) and a control group n=10). Data were collected before and after the application of the brain dance group program for cultivating human qualities. and collected data were analyzed using SPSS 14.0 for Windows through paired sample t-test. According to the results. the brain dance group program was found to have a positive effect on self acceptance and self control. and this suggests that brain dance is a useful tool for enhancing pre early childhood care teachers' self-acceptance and self control. The findings of this study are expected to be used as basic information for tertiary education institutions' development of strategies to raise brain dance experts and educational experts who are to develop various education programs using brain dance.

• Journal of Korean society of Dental Hygiene
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• v.17 no.6
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• pp.1037-1051
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• 2017

Objectives: The purpose of this study was to examine the knowledge of dental hygienists on CPR, their CPR attitude and performance ability in an effort to offer data that can contribute to the development of a more effective CPR education program. Methods: A self-reported questionnaire was filled out by 234 dental hygienists in Jeollanam and Jeollabukdo from February 24 to May 20, 2017. The questionnaire asked dental hygienists of the knowledge, attitude, performance ability in regards to CPR. The data were analyzed using SPSS Window ver. 19.0 program through independent t-test, one-way ANOVA, chi-square test and multiple regression analysis. The Cronbach alpha of their CPR knowledge was 0.78, and that of attitude to CPR was 0.79. The Cronbach alpha of CPR performance ability was 0.96. Results: The dental hygienists surveyed in this study who were aware of CPR accounted for 88.9% of total subjects. Dental hygienists who were certified in CPR accounted for 20.5% of total subjects. They received a score of 7.66 on CPR knowledge, 3.33 on attitude and 2.61 on performance ability. There was a positive correlation between the knowledge and attitude, between the knowledge and performance ability and between the attitude and performance ability (r=0.332, r=0.461, r=0.426). A regression analysis showed that the dental hygienists who were younger, who graduated from a four-year university or a higher educational institution, who were CPR certificate holders, who received more CPR education, who were cognizant of automated external defibrillator, who were more knowledgeable on CPR and who took a more positive attitude were more likely to be affected in terms of CPR performance. Conclusions: The dental hygienists surveyed were aware of CPR on the whole, but their CPR knowledge, attitude and performance were not sufficient to perform CPR in emergency situations. More intensive education should be provided for dental hygienists to have an accurate knowledge of CPR to carry it out with a positive attitude.