• Journal of Energy Engineering
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• v.25 no.1
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• pp.43-47
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• 2016

KHNP CRI has developed APR+ nuclear power plant since 2007, which is GEN III+ model with 1500 MWe capacity. To develop safer nuclear power plant than APR1400, we investigated advanced design features of ALWR being constructed in Korea and being developed/constructed in foreign countries. We applied the advanced design features and lessons learned from Fukushima accident to develop APR+ standard design suitable for both domestic construction and overseas construction business. One economic assessments have performed during safety design improvement phase(2013.1 ~ 2015.12) of APR+. The result of the economic analysis for APR+ safety inhancement design showed that APR+ N-th plant is about 39.2% more economical than coal-fired 1,000MW power plant. Also APR+ plant is more cost advantage over foreign advanced nation ALWRs.

• Journal of The Korean Association of Information Education
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• v.16 no.4
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• pp.489-502
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• 2012

Today computer education puts an emphasis on algorithm education. There are little researches about how to express the given problem in algorithm and how to interpret the expressed algorithm. In this study play-based learning methods dealing with flow chart which is one of the expressing tools of algorithm are developed for lower graders of elementary school. Then we diagnosed the learning possibility of the tool after applying the methods in a classroom environment. There are four types of learning game activities; sequential play, selective play, repetitive play and puzzle play. Puzzle play is a game that students need to reconstruct the learned content to a real flow chart by using flow chart cards. The result of an achievement test after teaching students flow chart showed that the group who took the play-based lesson got their average score with about 7.5% higher than the group who took the ICT-based lesson. Both the groups got their average scroe of more than 9 out of 10 after the lesson. This result shows that flow chart lessons are adaptable for the lower graders of elementary school. It also shows that play-based education can be exceptionally effective.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.46 no.4
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• pp.315-323
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• 2018

CanSat has being attracted considerable attentions for the use as training purposes owing to its advantage that can implement overall system functions of typical commercial satellites within a small package like a beverage can. So-called P.P.T CanSat (Power Plant Trio Can Satellite), proposed in this study, is the name of a CanSat project which have participated in 2015 domestic CanSat competition. Its main objective is to self-power on a LED and a MEMS sensor module by using electrical energy harvested from solar, wind and piezo energy harvesting systems. This study describes the system design results, payload level function tests, flight test results and lessons learned from the flight tests.

• Journal of the Korean Geotechnical Society
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• v.21 no.4
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• pp.135-143
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• 2005

This paper presents a case history of a geosynthetics-reinforced segmental retaining wall, which collapsed during a severe rainfall immediately after the completion of the wall construction. In an attempt to identify possible causes for the collapse, a comprehensive investigation was carried out including physical and strength tests on the backfill, stability analyses on the as-built design based on the current design approaches, and slope stability analyses with pore pressure consideration. The investigation revealed that the inappropriate as-built design and the bad-quality backfill were mainly responsible for the collapse. This paper describes the site condition including wall design, details of the results of investigation and finally, lessons learned. Practical significance of the findings from this study is also discussed.

• Journal of the Korean Society of Physical Medicine
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• v.9 no.4
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• pp.375-389
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• 2014

PURPOSE: The purpose of this study is to develop medical services for the elderly and qualitatively enhance physical therapy for them by analyzing korean students' knowledge of the elderly. METHODS: A total of 1027 male/female undergraduate students majoring in physical therapy were selected to examine the knowledge of the elderly. The knowledge of physical, psychological, and social aspects were investigated and measured by FAQ I of palmore (1988) and a scale developed by Yunjin et al. (1982). T-test, One-way-ANOVA and Scheff test were used. RESULTS: The percentage of the students who correctly answered the questions on the elderly was 53.6%. In particular, the higher error rates were seen in the social (56.9%) and psychological (57.6%) aspects compared in the physical (33.7%) aspects. Those who answered the questions correctly were over 30s (63.69%, p=0.000), seniors (57%, p=0.000)and grown in cities (53.91%, p=0.001). In addition, students who took lessons on the elderly (57.71%, p=0.032)and had experiences in voluntary services (54.09%, p=0.023) were significantly higher in answering the questions correctly. CONCLUSION: When students learned about the elderly, social and psychological aspects should be reinforced. The knowledge levels of the elderly can be elevated though voluntary services. It is thought that a follow-up study would be continuously neede to improve physical therapists' knowledge on the elderly and quality of available services.

• Communications of Mathematical Education
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• v.25 no.1
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• pp.119-145
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• 2011

We study on the Connected Mathematics Project(CMP), one of the American mathematics education reform projects which have been promoted since the 1990s, so that we can provide some suggestions for the recent research of developing the 2009 Korean Mathematics Curriculum. In this paper, we examine the background of the CMP, the controversies over the textbooks [CMP1 textbooks] developed by CMP[CMP1] implemented from 1991 till 1996, and the curriculum of the CMP[CMP2] revised from CMP1 and carried from 2000 till 2006. Through the literature study, we can see that the CMP2 curriculum has reflected some of those controversies of the CMP1 textbooks by introducing procedures for students' acquiring basic skills, reducing the number of lessons and the contents supposed to be learned in each lesson, putting more stress on algebra and adding data analysis contents more.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.398-401
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• 2003

Along with rapid changes and increasing competitions of the global market, a country with advanced technology can gain competitiveness edges. The Korean government recently announced 'Strategic Plan for the Next Generation Driving Forces Industry' in order to respond this global challenges. However, it appears that the construction industry has been put out from the discussions. It can be argued that considering the size and contributions of the industry to the national economy, driving engines for the industry should be considered and identified. The objective of this paper is to propose the criteria of driving engines for the construction industry based on the analysis of the common characteristics of 6T industries' driving forces as recently announced.

• Journal of Environmental Science International
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• v.23 no.8
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• pp.1523-1536
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• 2014

Restoration is the process of reducing or reversing damage to an ecosystem so that it can function in its original manner. However, many restoration programs do not achieve this. In the Nakdong Estuary, the largest migratory nesting site in the center of the East Asian-Australasian flyway, an estuarine barrage was constructed in the 1980s that required site restoration following its completion in 1987 and the expansion of several large industrial complexes(Noksan and Jangrim) and a residential development(Myeongji). The goal of the restoration was to restore the function of the wetland to its pre-disturbance state. To achieve this, a restoration program was designed consisting of three stages. The first stage(1993-1995), saw the construction of three artificial wetlands(Shinhori, Daemadeung, and Eulsuk), the second(2003-2005) involved the dredging and returning of farmed lands to their natural state, and the third(2008-2012) focused on the rehabilitation and vegetation development of the wetlands. However, the project has not achieved all of the desired goals, and it is an example of the lapses in ecological restoration following anthropogenic disturbance. Issues that resulted in an incomplete restoration included the timing of the stages, noncompliance with the restoration plan, not directly monitoring the restoration or continuing the monitoring following completion of the development project, and the political subversion of the restoration plan. For the success of the restoration plan, it is necessary to avoid mistakes such as inconsistent monitoring, unequal levels of stakeholder involvement, and political interference.

• Korean Institute of Interior Design Journal
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• v.15 no.5 s.58
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• pp.130-140
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• 2006

The purpose of this study was to compare the houses of Richard Meier and those of Mario Botta to identify the features of their houses. To identify the features of their houses through comparison, it was most important to understand the influences of their masters on them. Based on the lessons they learned from their masters, their houses were compared and analyzed. The findings were as follows. First, both their houses illustrated the principle and language of Le Corbuiser. They extended the principle and language of Le Corbuiser with their own thoughts and ideas and applied those to their houses. Second, the difference between their houses arose from the influence of Louis Kahn and Carlo Scarpa on Botta and the influence of Mies van der Roeh on Meier. Botta who was taught by Kahn and Scarpa was able to develop his expressive and heavy style of brick house, while Meier who was influenced from Mies was distinguished for his cold, transparent, sleek and contemporary style of house. Third, they both showed outstanding abilities to integrate the principles and languages of their masters in their own creative ways, when developing their own styles of houses. While Volume of Corbuiser, skills and languages of Kahn and Scarpa were put together in Botta's house, the Corbuiser's feature of sectional variety and the Mies' feature of sleek and transparency were overlapped in Meier's house. Fourth, while new expression shown in Botta's house was achieved in the process of integrating the languages of Kahn and Scarpa, new expression shown in Meier's house was created mostly in the process of taking and applying materials and languages from contemporary times.

• Journal of Advanced Navigation Technology
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• v.20 no.2
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• pp.127-133
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• 2016

This paper proposes a case study of applying to DO-278A, which is a software development standard of ground aviation equipment in communication, navigation, surveillance/air traffic management (CNS/ATM) domain, in order to develop software of Advanced surface movement, guidance and control system (A-SMGCS). It explains considerations to application of DO-278A standard, discusses how to tailor processes or requirements specified in DO-278A in detail, and explain tailored results. And it also summary problems or issues occurred during application of DO-278A, which can be appeared when DO-278A is applied to for the first time by any development part. These are required considerations in order to reduce trial and error. To the conclusion, it explains lessons learned from application of DO-278A and suggest how to solve these problems or issues.