Jong-Un Park

Investigation of boiling heat transfer characteristics of two-phase closed thermosyphons with various internal grooves

The boiling heat transfer characteristics of two-phase closed thermosyphons with internal grooves are studied experimentally and a simple mathematical model is developed to predict the performance of such thermosyphons. The study focuses on the boiling heat transfer characteristics of a two-phase closed thermosyphons with copper tubes having 50, 60, 70, 80, 90 internal grooves. A two-phase closed thermosyphon with plain copper tube having the same inner and outer diameter as those of grooved tube is also tested for comparison. Methanol is used as working fluid. The effects of the number of grooves, the operating temperature, the heat flux are investigated experimentally. From these experimental results, a simple mathematical model is developed. In the present model, boiling of liquid pool in the evaporator is considered for the heat transfer mechanism of the thermosyphon. And also the effects of the number of grooves, the operating temperature, the heat flux are brought into consideration. A good agreement between the boiling heat transfer coefficient of the thermosyphon estimated from experimental results and the predictions from the present mathematical model is obtained. The experimental results show that the number of grooves and the amount of the working fluid are very important factors for the operation of thermosyphons. The two-phase closed thermosyphon with copper tubes having 60 internal grooves shows the best boiling heat transfer performance.

A Study on Students', Parents', and Teachers' Change of Perception on Creativity and Character Education through Operation of Creativity and Character Model School

Abstract The purpose of this study was to investigate the change of perceptions of students’, parents’, teachers’ on creativity and character education at the model school for creativity and character education. This study used pre and post tests to examine the effects of creativity and character education on students, parents, and teachers. The results were as follows. Firstly, operating model school for creativity and character education brought about the statistically meaningful changes of students’ perception on creativity and character education. However, the changes seemed that the level of their perception on creativity and character education was not rational as the average is about 3.5 point. Secondly, operating model school for creativity and character education brought about the statistically meaningful changes of parents’ perception on creativity and character education. However, the changes seemed that the level of their perception on creativity and character education was not rational as the average was about 3.5 point like their children. thirdly, operating model school for creativity and character education brought about the statistically meaningful changes of teachers’ perception on creativity and character education. The changes seemed that the level of their perception on creativity and character education was rational as the average was about 4.5 point unlike their students and school parents. Fourthly, it seemed that the perception on creativity and character education showed a difference among students, school parents, and teachers.Key words : Creativity․character model school, Creativity․character education, Creative activityCorresponding author : 051-629-5971, pjun9017@pknu.ac.kr

A Study on Duty Competency and Utilizing Package Development for Construction of Marine Terminal Structure

Abstract NCS development for construction of marine terminal structure was carried out through following procedures such as analysis on characteristics, analysis on duty, development of the first draft for standards, validation of industry sites, duty competency standards through expert committee, and utilizing package. The results were as follows. Firstly, duty competency was classified as levels from 3 to 7. Educational training institutions were followed by 22 universities, 21 colleges, 16 graduate schools, and 10 high schools. Secondly, developed standards were consisted of duty and competency unit. The name of duty was construction of marine terminal structure and competency units were consisted of 9 items as survey on economic effect, evaluation of conditions on construction environment, plan for construction of structure, construction of transfer, mooring, and power equipment, and construction, startup test, and maintenance of terminal structure. 33 competency unit elements below 9 competency units were developed. Thirdly, utilizing package was developed into 3 areas of life-long career path, training criteria, and guidelines for exam according to national competency standards for in order to develop development of labor’s career and perform personal management such as hiring and promotion in industry sites.Key words : NCS, Duty Competency, Utilizing package, Construction Marine terminal structureCorresponding author : 051-629-5977, badlle@pknu.ac.kr ( ) (2015).

The Effect of Self-Efficacy of Marine Officer on Job Satisfaction and Self-Development

Abstract The purpose of this study was to clarify the meaning of marine officer’s self-efficacy, job satisfaction, definition of self-development and factors of determination. It shows that how their self-efficacy affects job satisfaction, self-development and that how their job satisfaction affects self-development. To achieve the purpose of the research, checked the definition and factors of marine officer’s duty, self-efficacy, job satisfaction and self-development. Furthermore, cultivated a research model about the factors to influence between self-efficacy and job satisfaction, self-efficacy and self-development, job satisfaction and self-development. A result of hypothesis test by regression analysis is that 11 hypotheses were adopted among 17, and the rest of them were dismissed. The contents of hypotheses were set as follows; self-efficacy and internal job satisfaction, self-efficacy and external job satisfaction, self-efficacy and self-development, job satisfaction and self-development.Key words : Marine officer, Self-efficacy, Job satisfaction, Self-developmentCorresponding author : 051-629-5972, wonhyo@pknu.ac.kr

A Study on the Realities and Recognition of Integrated Science Essay in High School

The purpose of this study investigates high school students` recognition and realities on the integrated science essay and is to suggest desirable direction of integrated science essay of how eduction. To this end, this paper was a questionnaire developed for use, it consists of the status, the writing skills and recognition of integrated science essay. Firstly, all grade students recognize the interest in integrated science essay class, but the need for third grade boys urgently was feeling. Second, STEAM class as a whole than average preference was. Third, integrated science essay was the most relevant, then was mathematics, languages, philosophy ethics, and social. Fourth, integrated science essay class with boys than girls in grade 1, science essay writing, reading science-related essay books, grammar, knowledge of the science and philosophy of science lessons, classes STEAM, read commentary essay reference all on the item, the higher affinity. Currently being implemented in integrated science essay test compared to the first, team teaching approach in schools project under one class teaches students how many teachers should be made. Second, it would require modifications of course content tailored to the preferences of female preference for science higher grade female students to disappear.

A Study on Realities and Teachers' Perception of Integrated-subject Essay Education in High School

Abstract The purpose of this study was to study on realities and teachers’ perception of Integrated-subject essay education in high school. Based upon teachers’ perception, literature research and interview on integrated-subject essay education, measures to promote integrated-subject essay education in high school as follows. First, focused on realities of integrated-subject essay education, it is desirable that integrated-subject essay start from the first grade. Second, focused on objectives of integrated-subject essay education, it is desirable that integrated-subject essay education and assessment be executed to meet students’ demand. Third, focused on contents of integrated-subject essay education, if high school teachers participate in essay examination questions and marking exams and essay examination questions is set within range of high school curriculum, it will contribute to normalizing public education. Fourth, focused on methods of integrated-subject essay education, teachers have to reconsider active perceptions to take a specialized essay training and to reduce a heavy workload to teachers, to develop guide book for integrated-subject essay education, to consult integrated-subject essay class, to develop specialized essay training program liking universities, to construct a specialized classroom for team teaching and debate class, to reduce students per class etc. are required. Fifth, focused on effects of integrated-subject essay education, it is desirable that integrated-subject essay education be executed for all students and in all subjects. Key words : Integrated-subject essay, Integrated-subject essay education, Perception, Reality Corresponding author : 051-629-5971, pjun9017@pknu.ac.kr

Exploring Plans to Improve the Onboard Training Management for Fisheries High School

This study aimed at exploring, based on the current states and status of onboard training ship, plans to improve the boarding training management for fisheries high school. The results were as follows. The problems with the management of onboard training ship were summarized as the following four types. Firstly, The most training ships throughout the country became superannuated. Secondly, the safe equipments for training ships were necessary to compensate the defects to fall short of the international safety management standards. Thirdly, the problems could result from the dualized system between ownership and management, since training ships were owned by metropolitan and provincial education offices and operated by management centered schools. Fourthly, middle technicians such as professional fisheries manpower were not easily supplied with. The plans to improve the above problems were as in the following. Firstly, support and help of Ministry of Maritime Affairs and Fisheries were needed to launch new onboard training ships which substitute for the superannuated. Secondly, new onboard ships were required to be launched according to the updated international safety management standards. Thirdly, Korea Institute of Maritime and Fisheries Technology should hold onboard training. Fourthly, on-site onboard training expertise, systemic management, safety, etc. should be compensated through industry-university-institute collaboration.

Perception on Changes of the Characteristics of Examinee`s Group for the Elective Subjects of Fisheries and Shipping Industry in Vocation Education Division CSAT by Fisheries and Shipping affiliate Teachers

Abstract The purpose of this study is to analyze the trends that the Fishery and Shipping Department teachers at specialized vocational high schools have noticed about the characteristics of the applicant pool taking the College Scholastic Achievement Test(CSAT) since the vocational education division was first introduced in the CSAT in 2005. In addition, surveyed data from the study is highly desirable for researchers to understand the changes in the characteristics of the applicants for the fishery and maritime department in the CSAT. This study not only provides solid improvement on the selection of questions for the CSAT but also facilitates in the process of writing contemporary and relevant exam questions.The survey included 76 Teachers from 12 High School of Fisheries and Shipping Industry. The results were as follows. First, the reduction in the number of applicants for Fishery and Maritime department in the CSAT after 2010 is due to the new governmental policy that encourages students in vocational schools to find employment rather than pursuing further education. Second, the biggest group of students who forgo taking the CSAT after 2010 is those with high marks at school. Third, prediction of outcome after declining to take the person for the time being would be kept to a minimum sustained was staring personnel at some point.Key words : College Scholastic Achievement Test(CSAT), Vocational Education Division, Examinees group, Fishery and Shipping, Meister vocational high schools, Specialized vocational high schoolsCorresponding author : 02-3704-3849, rdaesung@kice.re.kr

An Analysis of Teachers` Expectation and Need for Creativity and Character Education

The purpose of this study was to analyze qualitatively perception on creativity and character education of teachers who participated in winter training and workshop which the Southeast Regional Center for Creativity and Character Education arranged. The results are as follows. Firstly, it was shown that teachers perceived close corelation between creativity and character and competency necessary for students who will make a living for future society. Secondary, Teachers perceived that creativity and character education will benefit students in their cognitive, emotive, and affective aspects. Lastly, teachers thought that an administrative assistant and financial help such as securing classroom had to be supported so that they were able to freely conduct creativity and character education and teaching materials provided by the Regional Center for Creativity and Character Center were helpful in establishing a whole foundation when they started to conduct creativity and character education.

A Study on Analysis of Teachers' Recognition on Field Practice and Effectiveness of Creativity and Character Education

Abstract The purpose of this study was to investigate teachers‘ recognition on field practice and effectiveness of creativity and character education. This study used post tests to examine the effects of teacher training for creativity and character education on 451 teachers. The results were as follows. Firstly, the average in satisfaction of teacher training for creativity and character education was 4.65 for elementary teachers and 4.35 for secondary teachers in summer, and 4.55 for elementary teachers and 4.42 for secondary teachers in winter. Secondly, effectiveness of teacher training on creativity and character education was showed highly as more than 4.0 and was higher in winter than in summer. Thirdly, in the case of field practice and effectiveness of teacher training for creativity and character education, the average of elementary teachers(3,66) was higher in respect of educational environment than that of secondary teachers(3.20) and the averages of elementary teachers and secondary teachers were 3.85 and 3.42 in respect of subject activity, respectively. In practising creativity and character education, it was analyzed that both elementary(ave. 3.89) and secondary(ave. 3.84) teachers went through some difficulties for curriculum reconstruction, development of instructional model, program development, and human and physical supports.Key words : Creativity․character education, Field practice, Effectiveness analysisCorresponding author : 053-850-4364, syoungpark@daegu.ac.kr 2013 (2014).