• Applied Chemistry for Engineering
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• v.18 no.2
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• pp.173-177
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• 2007

EB irradiation method was used to prepare polyvinyl alcohol (PVA) capped silver nanoparticles under various conditions including PVA concentration, $AgNO_3$ concentration, IPA concentration, and EB dosage. The increase in the distribution of particles size was observed with an increase in the concentrations of PVA, $AgNO_3$, IPA, and EB dosage. $AgNO_3$ concentration, IPA concentration, and EB dosage were found to have a great effect on the amount of silver particles formed in PVA matrix by EB irradiation method. These results were confirmed by XRD, UV, and TEM. XRD (X-ray diffraction) technique confirmed the zero valent state of silver. Optical studies were done using UV-visible spectrophotometer to see the variation of silver particles formed in PVA matrix. Transmission Electron Microscopic (TEM) was employed to show the particle size and distribution of silver foamed in PVA matrix.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.30B no.10
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• pp.95-104
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• 1993

IPA(interpattern association) model is a method of feature extraction using a neural network. Even in the case that the reference patterns are simuklar to one another, this model can recover the reference patterns effectively. However, when the pattern whose feature pixels are lost is used as input, this model can not guarantee perfect recovery of the reference pattern. It is proposed a improved interpattern association(IPA) model for the feature extraction using neural network. The improved IPA model that combines the first interconnection weight matrix of the IPA model with the second additional weight matrix is proposed here to overcome the recovery problem of the original IPA model. The results of computer simulation and optical experiment are advanced.

• The Journal of the Korea Contents Association
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• v.16 no.11
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• pp.271-280
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• 2016

This study is intended to search for action strategy making it possible to compare and overcome a gap between the awareness of importance and the present performance of human rights in the Disabled Residential Facilities. To this end, an empirical study was made on how high the level of awareness of human rights in the Disabled Residential Facilities and the level of performance was and whether there was gap between the awareness of importance and the present performance for 114 directors in Gyeonggi, Gyeongbuk and Jeonnam province. The results of study are as follows. First, it was shown that they shared the perception that human rights in residential care home were important. Second, it was shown that there was a statistically significant difference in the gap analysis between the level of performance and importance of human rights area in residential care home. Third, the results of analysis using IPA matrix were presented in order to establish an action strategy making it possible to overcome a gap between importance and performance. On the basis of these results, practical implications and further research topics were presented.

• Korean Journal of Community Nutrition
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• v.14 no.1
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• pp.43-54
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• 2009

The purpose of the study was to investigate the status of the nutritional education program on educational perception, facilities, contents and systems, which were focused on the school obesity education in the elementary school. A five point Likert scale was used to evaluate the importance and performance of each item in four sections of the survey and Importance-Performance Analysis (IPA; gap between importance and performance) matrix analysis was applied to determine improvement priority. The findings from IPA matrix analysis are in the following. The items of the sections to be improved intensively are recognition of parents and in-charge teacher, availability of the education place, preparation of consulting room, preparation of various teaching media, interest of an education program, meal adjustment of overweight children, combination with education and exercise, education for psychological factors, development of scientific and systematic education program and reduction of meal service duty for education. Accordingly, the IPA matrix analysis suggested that an intensive improvement area should be excessively concentrated on for better performance. The regional gap between importance and performance showed significant difference for textbook and diet of overweight children in Kyunggi-Do. There were significant differences for the government perception, dietary habits and food-life education, fast-food education, education for breakfast importance, and education of school meal indication system and method to read food nutrition indication in Chollabuk-Do. As for the age gap between importance and performance, the twenties showed significantly bigger gaps in perception of school dietitians and linking between school meals and diet education. Therefore, more proactive efforts for the education for obesity prevention are necessary to prevent childhood obesity in elementary school and to help children to possess better health throughout their entire lives.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.4
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• pp.1595-1603
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• 2013

This study uses the Importance Performance Analysis (IPA) on viewing motivation for the revitalization of Korean creative musicals. The IPA is the evaluation techniques to simultaneously compare and analyze relative importance and achievement of each attribute for multi-attribute models. This analysis uses the discerning method by displaying the matrix that includes the factors about which customers care and customer satisfaction on each factor. The customer satisfaction is determined by customer expectation for each attribute and its implementation level. This study, through this method, exams the importance and satisfaction level on attributes of viewing motivations for Korean creative musicals.

• The Journal of the Korea Contents Association
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• v.17 no.11
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• pp.461-469
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• 2017

The purpose of this study is to verify the difference of importance-performance about human right of social worker who works in the Disabled Residential Facilities. And based on this result, we wanted suggest strategies to implement human rights for the disabled. We collected data from 539 social worker who works in the Disabled Residential Facilities in Busan. We tried analysis descriptive statistics, T-Test and Importance-Performance Analysis. The Result is first, the importance level(total mean 6.27) was higher than the performance level(total mean 6.07) to human rights of the disabled. Second, in items of human rights of the disabled, there was the difference of the importance and the degree of performance. Third, with the exception of political right, the difference between the importance and performance of liberty, the right to survival, and the social right was statistically significant. Based on these results, I suggest practical implications and future tasks.

• Korean Journal of Construction Engineering and Management
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• v.23 no.5
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• pp.77-86
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• 2022

Safety accidents on the construction scene can cause serious accidents, that take worker's life, and as the government has been making great efforts to reduce industrial accidents, the role of safety managers closely related to accidents at construction sites is becoming important. However, job stress is high due to excessive workload and inefficient work managed by safety managers in the current construction safety management system. So, it is necessary to improve and simplify the work contents. The main purpose of this study is to identify and improve tasks that need improvement and simplification of inefficient tasks, obtained through expert opinions and surveys on the level of difficulty and prevention effect of tasks in the safety manager's working stage, by using 2×2 Matrix analysis techniques. Therefore, this study will ultimately contributes reducing the occurrence of safety accidents on the construction scene.

• Journal of Engineering Education Research
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• v.20 no.6
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• pp.43-51
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• 2017

As the need for entrepreneurship to create new values and innovate in the rapidly changing social environment is emerging, education for entrepreneurial is emerging in university education. The purpose of this study is to understand the current status of entrepreneurship education and to derive the priority of education based on actual indicators of importance-performance. For this study, we surveyed 227 female college students in E Woman's University by using the Importance-Performance Analysis (IPA) method for entrepreneurship factors. The result showed that the means of importance of all factors and sub-factors of entrepreneurship were higher than the means of performance of them, and the difference was statistically significant except for the determination. In addition, the results of the IPA matrix analysis showed that the factors that needed urgent improvement in self-confidence, future-orientation, active/innovative activities, and proactivity. Based on the results of this study, the implications of the development of entrepreneurship curriculum for college students in engineering field were discussed. This study is meaningful that it provided practical basic information of curriculum design leading to the manifestation of entrepreneurship of women in engineering field by analyzing entrepreneurship of female engineering students and deriving priority factors of educational treatment.

• Journal of Digital Convergence
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• v.14 no.6
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• pp.489-498
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• 2016

The purpose of this study was to evaluate selective attributes importance and satisfaction of University Ski Lecture Environment that students perceive using IPA method. In order to achieve this goal, a questionnaire was used to gather data, and the convenient sampling method was used to select 300 members from three pertinent university in Seoul and Chungcheong-do, Gyeongsang-do Province as participants of this study. Only data from 221 respondents however were used after screening data for reliability, and SPSS for Windows(21.0 version) statistical program was used to conduct descriptive analysis, factor analysis, reliability analysis, paired samples t-test analysis, independent samples t-test analysis and IPA matrix analysis. The following results were obtained. First, significant differences between the level of satisfaction and the level of importance were found for part of the selection attributes for each group. Second, Iquadrant was included with meals and information provided factors. IIquadrant was included with instructors and class program, information provided, accommodation factors. IIIquadrant was included in accommodation and meals, time-distance factors. IVquadrant was included in the information provided factor.

• The Journal of the Korea Contents Association
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• v.17 no.6
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• pp.661-671
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• 2017

The purpose of this study is to compare and analyze the difference between the importance perceived by pre-school teachers and their actual performance in regards to the 7 Guidelines of Safety Education set out by the Ministry of Education, and through the analysis, to identify the items that need priority support and those that need long-term improvement efforts for exemplary safety education for young children. For this, mean average and standard deviation were calculated and paired sample t-test conducted, and IPA(Importance-Performance Analysis) matrix method was performed to analyze the priority and long-term support items and improvement needs. The study results show differences in all areas and all items in the 7 Guidelines of Safety Education by the MoE in the pre-school teachers' perceived importance and actual performance. Areas and items that are identified to be in need of priority support for exemplary safety education in pre-schools; 2 items under 'Violence and Personal Safety' area and I item under 'Substance and Internet Addictions' area. Areas and items that are identified to be in need of long-term improvement efforts are; 6 items under 'First Aid and Emergency Treatment' area, 1 item under 'Violence and Personal Safety' area, 3 items under 'Workplace Safety Culture' area, 3 items under 'Substance and Internet Addictions' area and 1 item under 'Disaster and Safety' area.