• International Journal of Aeronautical and Space Sciences
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• v.17 no.4
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• pp.535-550
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• 2016

Securing the safety and the reliability of liquid-propellant rocket engines (LREs) for space vehicles is indispensable as engines consist of many complex components and operate under extremely high energy-dense conditions. Thus, health monitoring has become a mandatory requirement, especially for the reusable LREs that are currently being developed. In this context, a dynamic simulation program based on MATLAB/Simulink was developed in the current research on the Space Shuttle Main Engine (SSME), a partly reusable engine. Then, a series of fault simulations using this program was conducted: at a steady state operating condition (104% Rated Propulsion Level), various simulated fault conditions were artificially injected into the simulation models for the five major valves, the pumps, and the turbines of the SSME. The consequent effects due to each fault were analyzed based on the time responses of the major parameters of the engine. It is believed that this research topic is an essential pre-step for the development of fault detection and diagnosis algorithms for reusable engines in the future.

• Journal of Astronomy and Space Sciences
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• v.40 no.4
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• pp.173-197
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• 2023

ShadowCam is a high-sensitivity, high-resolution imager provided by NASA for the Danuri (KPLO) lunar mission. ShadowCam calibration shows that it is well suited for its purpose, to image permanently shadowed regions (PSRs) that occur near the lunar poles. It is 205 times as sensitive as the Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC). The signal to noise ratio (SNR) is greater than 100 over a large part of the dynamic range, and the top of the dynamic range is high enough to accommodate most brighter PSR pixels. The optical performance is good enough to take full advantage of the 1.7 meter/pixel image scale, and calibrated images have uniform response. We describe some instrument artifacts that are amenable to future corrections, making it possible to improve performance further. Stray light control is very challenging for this mission. In many cases, ShadowCam can image shadowed areas with directly illuminated terrain in or near the field of view (FOV). We include thorough qualitative descriptions of circumstances under which lunar brightness levels far higher than the top of the dynamic range cause detector or stray light artifacts and the size and extent of the artifact signal under those circumstances.

• BMB Reports
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• v.49 no.1
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• pp.37-44
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• 2016

Spectraplakins are crucially important communicators, linking cytoskeletal components to each other and cellular junctions. Microtubule actin crosslinking factor 1 (MACF1), also known as actin crosslinking family 7 (ACF7), is a member of the spectraplakin family. It is expressed in numerous tissues and cells as one extensively studied spectraplakin. MACF1 has several isoforms with unique structures and well-known function to be able to crosslink F-actin and microtubules. MACF1 is one versatile spectraplakin with various functions in cell processes, embryo development, tissue-specific functions, and human diseases. The importance of MACF1 has become more apparent in recent years. Here, we summarize the current knowledge on the presence and function of MACF1 and provide perspectives on future research of MACF1 based on our studies and others. [BMB Reports 2016; 49(1): 37-44]

• Journal of the Korean Institute of Educational Facilities
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• v.15 no.1
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• pp.5-16
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• 2008

In general, It is known that there are important concepts related with organization space of the elementary school in Japan. They are correspondence to various educational method, consideration of children's activity, consideration about use of the local residents, application of the concepts of house design, and introduction of the ecological concept and technology. But there is little report written concretely how to plan and design for above mentioned concepts and it is realty necessary to investigate about these for the future image of elementary school in Korea. For this purpose, we investigated by analyzing the plan, and the design explanation of the 84 excellent public elementary schools awarded by Ministry of Education, Culture, Sports, Science and Technology from 1988 to 2005 in Japan. As a result, we have found many examples about various spaces, methods and ideas to plan a school that is specialized and fit for a local peculiarity and user(children and local residents). The diversity of educational method and ecological concepts correspond to direction of future's society.

• The Journal of Sustainable Design and Educational Environment Research
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• v.23 no.2
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• pp.1-10
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• 2024

This study presents a model for educational planning based on user participatory design for the purposes of curriculum development and educational space innovation. It reviewed previous research and practices related to educational space innovation, educational planning processes, and user participation design and suggested a draft model. This model was applied in the renovation project of an elementary school, and the problems encountered during the application were reflected upon and used to improve the model. The final model comprises four phases. Phase 1 is an initial exploratory phase foruser participation, where educational planners and users form a shared perspective regarding the future of education. Phase 2 is a needs-analysis phase for the transition to future education, which focuses on setting the overall direction of the school-level curriculum. Phase 3 specifies the direction of future school curricula and identifies needs for educational spaces. Finally, Phase 4 focuses on the interaction between educational and space planners. Based on the above discussion, the study discussed the benefits and limitations of this educational planning model for school space innovation.

• Journal of The Korea Institute of Healthcare Architecture
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• v.23 no.1
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• pp.25-36
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• 2017

Purpose: The analysis of space configuration of dentistry through examining Korean dental history and comparison are necessary for the development of planning of the dental healthcare system. This study has been started in order to provide basic information for the planning of hospital architecture in dentistry. Methods: Literature review of space configuration and historical background in dentistry have been conducted. The changes of site plan and space configuration of Seoul National University, Yonsei University and Kyunghee University, School of Dentistry and Dental Hospital have been analyzed in dental history of Korea and corresponding spaces. Results: The result of this study can be summarized in three points. The first one is that space configuration of dentistry in Korea is different from that of West. The clinical treatment space had been started first and the education and research space was followed after a short interval. The second one is that the space configuration in School of Dentistry and Dental Hospital shows that dental space had differentiated and specialized to dental education and clinical space in a building. It had spatially divided and separated to the education and research complex and the dental hospital and it had a branch building. The third one is that the dental public health in Korea has not been actively applied until recently and it should be developed in a near future. Implications: It is necessary to analyze space configuration of other dental schools and their hospitals to develop the relationship between space and program in healthcare system.

• Journal of the Korean Institute of Educational Facilities
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• v.26 no.5
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• pp.26-31
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• 2019

• Journal of the Korean Institute of Educational Facilities
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• v.21 no.5
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• pp.13-21
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• 2014

This thesis aims to explore and suggest the concept of future schools that integrate school construction and design with curriculums in a consistent manner. To this end, a case study was conducted on the design planning process of C elementary school for 10 months from October 2013 to July 2014. Regarding the method of study, the aerial view and floor plan, which were created after much deliberation by various experts in curriculum and construction as well as school administrators and the management, were analyzed from the perspective of curriculums. This study hopes to lay out directions on how to create the school space in the future so that school education not only focuses on delivering knowledge and caring for students but also takes into account the environmental factors surrounding students - or the aspect of "spatial interaction."

• The Journal of Sustainable Design and Educational Environment Research
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• v.21 no.1
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• pp.24-39
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• 2022

This study was conducted to provide implications so that teachers' voices are heard in the social consensus for future schools by exploring teachers' needs for future school spaces. A qualitative study was performed to listen to teachers' voices directly, and 10 teachers from "A" Elementary School (tentative name) participated in the study. The study 1) recognized the emergence of learning that transcends time and space, and emphasized the importance of an ICT-based informatization environment that can support such learning, 2) confirmed the characteristics of futuristic school spaces centered on "tradition" and "technology," 3) recognized the importance of learning community spaces, 4) emphasized "variable" classrooms for flexible teaching and learning activities, and 5) confirmed the need to introduce eco-friendly elements and provide support for those who may be vulnerable in high-tech learning environments. Finally, the study concluded that teachers need systematic education and experiences that contain sufficient important discourses related to future schools such as "eco-friendliness" and "connection with local communities".

• Journal of the Korean Institute of Educational Facilities
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• v.14 no.4
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• pp.4-13
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• 2007

In 21st century, mankind greets an era of ubiquitous computing where physical and virtual space are merged through the innovation of digital and IT(Information Technology), meanwhile ubiquitous computing and network paradigm suggest a new direction which our future educational system should head for. A society where people, computers, and objects can be connected with each other anytime and anywhere, that is, a society of ubiquitous computing where everything in our living space are interconnected by a immense network system may bring a variety of changes into our educational environment in schools. In this study I analysed the forecast of school educational orientation and ubiquitous educational environment and facilities in developed countries, and on the basis of the result, I performed a fundamental work for formation of a ubiquitous classroom environment which is feasible in Korea. In the section of conclusion, I present a model of ubiquitous classroom as a scenario based on ubiquitous computing technology applicable to future classroom environment.