• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.8
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• pp.2750-2757
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• 2010

Recently, there have been a number of voices from industry that automotive education at the college is too theoretical and so college graduates are lack of practical ability to apply the automotive idea to actual systems. In order to educate engineering students design qualities in creative problem solving, this paper reports the results of employing engineering design projects in a Motor sports course of at A College. This paper presents design creterion and manufacture process of $CO_2$ model dragster, measures $CO_2$ model dragster speed and aerodynamic drag. In order to investigate the impact of engineering design on student's learning, a survey was conducted in 2008 spring semester. According to the results of survey analyses, student's key competencies and satisfaction reports high values on engineering design projects.

• The Journal of the Korea Contents Association
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• v.7 no.10
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• pp.283-292
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• 2007

Recent studies on business performance in the operation of travel agency services note the importance of non-financial factors, in addition to financial factors. They also indicate that in order to enhance the business performance in travel agency services, it is necessary to emphasize the most competitive key factors based on the understanding of the circumstances with which those services are faced. The analyses of business performance in travel services and of related research Papers have showed that the major factors influencing the operation of travel agency services include the relationship with tourism-related companies the introduction of e-commerce and knowledge-based management, the services of employed workers, and brand awareness and advertising. The present study attempts to propose an approach to the efficient operation of travel agency services by reviewing and analyzing the different studies regarding these factors. To do so, this study employs the existing study reports and publications related to the operation of travel services, focusing mainly on literature review. The paper is composed of four chapters: The first is an introductory chapter; Chapter 2 provides the theoretical background; in Chapter 3 an analysis of the previous studies is attempted; and Chapter 4 presents the results of analysis and other considerable suggestions.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.6
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• pp.89-98
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• 2010

Isolated boost converter is desirable in the dc/dc converter applications where isolation is required and extremely high step up is needed. Transformer used to step up low input voltage into high output voltage must satisfy the volt-sec balance condition. Conventional isolated boost converter is controlled with conducting intervals overlapping. In this case, there is a problem that control circuit is complicated. In this paper, it is proposed and analyzed the isolated boost converter which set up a reset winding for the volt-sec balance of transformer and can construct the control circuit simple by using a self-driven switch. Finally, the validity of the theoretical analyses for the proposed converter is verified by both simulations and experiments on the 10[W] class isolated boost converter.

• Journal of Korean Academy of Nursing Administration
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• v.6 no.3
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• pp.319-331
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• 2000

The purpose of this study was to identify patterns of and trends in studies of job satisfaction among Korean nurses as selected from master theses whose research had covered studies from the period $1972{\sim}1997$. These studies were analyzed for publication date, research design, theoretical framework, research questions, and research hypotheses, subjects, sampling methods, measurement tools, statistical analyses, job satisfaction-related variables, and suggestions for further research. The findings of the analysis were as follows: 1) The number of studies on the subjects of job satisfaction has increased enormously since the 1980s. 2) In research design, 73.8% of the studies involved correlation research. 3) Conceptual frameworks, research questions, and hypotheses were not involved in 88.8%, 76.3%, and 68.% of the studies respectively. 4) With respect to subjects, 53.7% involved head nurses, charge nurses, and staff nurses. 5) As sampling methodology, questionnaires were employed in all the studies. 6) Measurement instruments developed by Slavitts et al.(1978) and Stamps et al.(1978) were used in 27 studies and 24 studies, respectively. 7) For the statistical analysis, ANOVA(30.7%), t-test(23.7%), and correlation(23.7%) were used. 8) The number of job satisfaction-related variables were eight items and 36 sub-concepts. 37.5%(30 studies) employed applied variables related to organizational characteristics. 9) 93.7% of the studies made suggestions for further research. On the basis of the above findings, the following recommendations were made: 1) Qualitative research should be performed to identify variables related to job satisfaction. 2) Research on developing interventions is needed to elevate job satisfaction. 3) Development of measurement tools is needed to evaluate the job satisfaction of Korean nurses. 4) Correlation studies are needed to identify the relationship between job satisfaction of nurses and outcomes to patients.

• Journal of Korean Academy of Nursing
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• v.28 no.4
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• pp.1013-1026
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• 1998

This study was performed to analyse the tendency of the self-care studies, to investigate the variables related to self-care, which could be applied for the data establishing the theory of self-care. To accomplish the objectives of this study, the researchers analyzed 83 studies available that contained the area of self-care, which was published in local and foreign areas between 1981 and Feb. 1997. The findings of this study are as follows : 1) Studies published in Korea were about twice more than foreign studies. According to the statistics, the number of studies in this study tended to increase year by year. Between 1991 and 1995 were most. Analysis on the subject of those studies showed, that they were most dealt with chronic diseases an adaults. 2) The theoretical definition of self-care were most referred to Orem's self-care. For the main concept of studies, self care performance was the most. 3) The correlational study was most often used design and experimental study is tended to increase. The questionnares were the most often used data collection method. There was lots of different variable measuring technique to evaluate main concepts. 4) In the results of analysis on the propositions related to the self-care performance, a client's education, social support, self-efficacy, and level of knowledge as a causal variable were found. Also, the physiological index improved and quality of life were found to be significant effective variables.

• Korean journal of communication and information
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• v.50
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• pp.121-142
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• 2010

Can law be combined with television entertainment programs? This paper explores the ways in which law systems and law culture are reflected in and reflect the television legal series. TV legal series, such as legal dramas and infotainment shows, provide platforms for the audiences, who otherwise have few opportunity in real life, to engage with legal systems in societies. Adopting loosely dramatized reality programs, these legal series not only entertain and inform audiences but also educate citizens. This paper combines analyses of theoretical debates on law and television with analysis of TV text. The result shows that , dramatized enactment based on true stories and criminal cases, may have an important ideological role in which fictionalized dramas mask the hard realities and authoritative legal systems. By doing so, TV legal shows play their roles not as mere symbolic representation but as powerful institutions that construct the image of law and reality.

• Journal of Digital Convergence
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• v.12 no.7
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• pp.65-76
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• 2014

This paper analyzes whether local public expenditures have converged during the 1985-2011 periods in Korea, using the sixteen metropolitan and provincial governments data. We analyze the convergence of per capita real local public expenditures in terms of both static view and dynamic view of convergence. Furthermore, we derive the estimating equation for per capita real local government expenditure growth function from theoretical model based on Skidmore et al.(2004)[23]. The main results from empirical analyses are such that an increase in aged people helped local government expenditures increase. Also, we found that the convergence speed of economic expenditure is greater than that of social welfare expenditure. Similarly the convergence speed of public capital expenditure is greater than that of public consumption expenditure. In the future we had better examine the convergence of local public goods taking into account their congestion rates.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.19 no.6
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• pp.447-456
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• 2007

Suspended particles behavior when they go through a vertical riser with heat transfer is of significant concern to system designers and operators in pneumatic transport, various processes such as in chemical, pharmaceutical and food industries. When it comes with the energy system, that knowledge is critical to the reliable design practices of related equipment as heat exchangers, especially in the phase of system scale-up. Without haying a good understanding of the related physics, many scale-up practices based on their pilot plant experience suffer from unexpected behaviors and problems of unstable fluidization typically associated with excessive pressure drop, pressure fluctuation and even unsuccessful particle circulation. In the present study, we try to explain the observed phenomena with related physics, which may help understanding of our unanswered experiences and to provide the designers with more reliable resources for their work. We selected hot exhaust gas with solid particle that goes through a heat exchanger riser as our model to be considered. The effect of temperature change on the gas velocity, thermodynamic properties, and eventually on the particles motion behavior is reviewed along with some heat transfer analyses. The present study presents an optimal riser length at full scale under given conditions, and also defines the theoretical limiting length of the riser. The field data from the numerical analysis was validated against our experimental results.

• Journal of the Korean Geotechnical Society
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• v.27 no.5
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• pp.45-59
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• 2011

This study introduces the diagrammatic Upper and Lower Bound (UB and LB) methods theoretically in order to derive the bearing capacity factor, $N_c$ in undrained clay and to compare with Prandtl's exact solution (1921). As a result of the theoretical study, an exact solution comes out when the UB and LB solutions are the same. In addition, the finite element analyses show that the failure loads approach to the bearing capacity factor of 5.14. Results of the FEA significantly depend on the finite element type, a number of elements, and a number of increments. From this study the exact solution defines that solutions from UB and LB are the same. However, this situation is very difficult to process, so we can confirm the exact solution as a range between UB and LB solutions.

• Journal of Korean Elementary Science Education
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• v.32 no.3
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• pp.327-345
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• 2013

This study aims to investigate how pre-service elementary school teachers understand 'something scientific', 'being scientific', 'scientific events' and 'scientific questions' through semantic network analysis. To achieve this purpose, this study carried out a central analysis of the frequency and density of words and the degree of connection between key words, a concentric analysis, a click analysis and a common network analysis through text semantic network analysis by using NetMiner 4.0 Program. Based on the results of these analyses, this study came to the following conclusions. Firstly, in perceiving 'something scientific', pre-service elementary school teachers recognized 'verification', 'objective' and 'experiment' as most important words. In other words, they perceived that main grounds for something scientific should be provided through clear facts, possible to be verified and accompanied by an exact and logical theoretical system. In regard to 'being scientific', they perceived 'explanation', 'objective' and 'verification' as most important words, while having a traditional point of view that science is a set that can be explained objectively. Secondly, in regard that the term, 'observation', is contained in 'scientific events', they showed a high rate of understanding it as a scientific event. In regard to scientifical reasons, they showed the highest frequency of 'observation', and for unscientific reasons, they showed the highest frequency of 'behavior'. In perceiving 'scientific questions', they showed the highest frequency of determining bacteria-related questions as scientific. As a reason why they thought as scientific, they mentioned 'observation' most frequently like 'scientific events', while mentioning 'value judgement' as a reason why they thought as unscientific most frequently. From the results of integrated network analysis, this study found out that words pre-service teachers commonly used in stating scientific events or scientific questions were overlapped with words they mentioned for scientific events or scientific questions. As a result, it was found there were many pre-service teachers having interpreted scientific words without clearly distinguishing scientific events or scientific questions.