• The Mathematical Education
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• v.52 no.2
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• pp.175-190
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• 2013

The purpose of this article is to suggest using portfolio for professional development of secondary pre-service mathematics teachers based on actual application case. To achieve this goal, 28 pre-service mathematics teachers developed their own portfolios in the regular study course for one semester under the pre-planned components of portfolio. Then they participated in the survey of their beliefs in mathematics and mathematics education and in the structured interview for drawing implications of using a pre-service mathematics teacher portfolio. According to the collected data, developing a pre-service mathematics teacher portfolio made a significant difference in beliefs of mathematics teachers' roles and showed the potential to improve the professional development of pre-service mathematics teachers as well as their learning. Continued investigation for more effective components of a pre-service mathematics teacher portfolio would be needed.

• The Journal of Korean Association of Computer Education
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• v.14 no.5
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• pp.55-69
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• 2011

The purpose of this study is to develop and apply e-teaching portfolio in EIU for pre-service teachers, and to explore the possibility of applying e-teaching portfolio in pre-service teacher education. E-teaching portfolio has developed an online platform after designing the component of teaching portfolio. And then pre-service teachers' perceptions were investigated. The findings, pre-service teachers thought that e-teaching portfolio was useful for the accumulation and management of instructional materials, and gave opportunities to improve self-reflection, teaching skills and evidence over the professional development through communication.

• The Journal of the Korea Contents Association
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• v.13 no.11
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• pp.968-978
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• 2013

The purpose of this study is to explore the strategies for application of e-portfolio for improving teaching efficacy of pre-service teachers. 35 pre-service teachers wrote reflection papers and uploaded their data to their personal e-portfolio during 10 weeks. They participated in two teaching efficacy surveys which were conducted before and after using e-portfolio. Twelve participants were interviewed regarding their experience and perceptions of e-portfolio. As the result of compared-sample tests, teaching efficacy increased statistically significantly. According to the students' interview, the pros and cons of e-portfolio were identified and the strategies for application of e-portfolio were suggested for improving teaching efficacy of pre-service teachers.

• Journal of Educational Research in Mathematics
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• v.26 no.2
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• pp.225-246
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• 2016

Teaching competence is the best part of mathematics teachers's competence. It need to make instruction plan by oneself, systematic self-reflection and improvement in instruction performance for development of teaching competence of pre-service mathematics teacher. So teaching practicum is the necessary process to teaching experience. Therefore, the aim of this study is to develop an component and application procedure of Teaching portfolio for improvement teaching component of pre-service mathematics teacher in teaching practicum. It is effective in improving teaching component of pre-service mathematics teacher after make Teaching portfolio for improvement teaching component in teaching practicum.

• Journal of Information Technology Services
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• v.22 no.5
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• pp.17-30
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• 2023

A company's sustainable growth is a very important goal, and for this purpose, the company's business model is changing into a convergence of products and services. The purpose of PS-Offering is to maintain a long-term relationship with customers, and customer experience management is necessary for this. This study presents a service design methodology that can support customer experience management of the PS-Offering business model. The experience management portfolio analysis methodology consists of four steps: 1. Deriving service encounter through customer journey maps; 2. Identify the service structure of each service encounter in three forms (FFC, FSC, FSE). 3. Analyze the customer's emotional variables, that is, customer experience, at each service encounter, Finally, 4. After plotting the level of customer experience at the service encounter, the analysis is conducted with a customer experience management portfolio that seeks future strategic plans for this. The methodology presented in this study will help in the service design of the service encounter unit centered on customer experience. And it will improve the financial performance of the company by raising the service level of the business model.

• Journal of the Korean Mathematical Society
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• v.44 no.1
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• pp.139-150
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• 2007

We investigate an optimal portfolio selection problem with transaction costs when an illiquid asset pays cash dividends and there are constraints on the illiquid asset holding. We provide closed form solutions for the problem, and by using these solutions we illustrate interesting features of optimal policies.

• Journal of The Korean Association For Science Education
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• v.36 no.2
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• pp.221-229
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• 2016

This study aimed to investigate the effects of portfolio application on pre-service science teachers' reflective thinking. For the purpose, we used narrative inquiry on pre-service science teachers' portfolios. We also analyzed the dimensions and levels of pre-service science teachers' reflective thinking. Analysis results showed that the pre-service science teachers' reflective thinking was mostly centered on focus at the beginning of semester. In addition, they exhibited routine and technical levels of reflective thinking. Analysis of pre-service science teachers' reflective thinking showed it as gradually extending to the dimension of inquiry and dimension of change by the end of semester. Here, the level of reflective thinking was higher at the dialogic level and transformative level. Pre-service science teachers showed that they had difficulties in making portfolios. However, they answered positively about application of portfolios. The results of this study suggest that there is a need to actively introduce portfolio assessment in teacher education courses in order to increase the reflective thinking of pre-service science teachers.

• The Magazine for Energy Service Companies
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• s.28
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• pp.54-59
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• 2004

Portfolio Manager는 미국 환경보호국(EPA)에서 만든 무료 소프트웨어 시스템으로 ESCO에게 매우 유용한 것으로 이미 입증되었다. Portfolio Manager 및 관련 제품은 ESCO가 일반적으로 겪게 되는 사업상의 문제를 해결할 수 있도록 설계되었다.

• Journal of The Korean Association For Science Education
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• v.20 no.1
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• pp.183-192
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• 2000

The purpose of this study is to investigate the effects of portfolio system on science teaching efficacy beliefs. From Chongju National University of Education, 83 subjects were selected. All of them are college sophomores, and 5 of them are males. The portfolio system developed by the researcher had been administered during the 1st semester of 1999. Korean Science Teaching Efficacy Beliefs Instrument (K-STEBI) was administered before and after portfolio instruction. Some parts of students portfolios were analyzed qualitatively in terms of elementary science teaching confidence. After portfolio instruction, students' science teaching efficacy beliefs increased statistically meaningfully. Elementary science teaching confidence and positive attitudes toward portfolio system also showed marked increase. Portfolio system seems to be effective in fostering pre-service elementary teachers' science teaching efficacy beliefs, and be a powerful tool for teacher education.

• Journal of Advanced Marine Engineering and Technology
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• v.39 no.10
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• pp.1049-1053
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• 2015

This paper proposes to include engine information in Maritime Service Portfolio (MSP) for effective implementation of e-Navigation. Even though engine information is one of most important element to e-Navigation, MSP consists of mainly about navigation and communication information not included engine information. Furthermore, in reality, engine information sent from ship side such as mainly noon report and Planned Maintenance System (PMS) is too limited to make e-Navigation possibly. Therefore, Remote diagnostic structure receiving and sending data of engine information must be included in MSP for implementation of e-Navigation. Also, it has to be designed, and developed by Software Quality Assurance (SQA).