• Journal of Korean Tunnelling and Underground Space Association
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• v.23 no.1
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• pp.25-36
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• 2021

Hydrogen in hydrogen-electric vehicles has a wide range of combustion and explosion ranges, and is a combustible gas with a very fast flame propagation speed, so it has the risk of leakage, diffusion, ignition, and explosion. The fuel tank has a Thermally active Pressure Relief Device (TPRD) to reduce the risk of explosion and other explosions, and in the event of an accident, hydrogen inside the tank is released outside before an explosion or fire occurs. However, if an accident occurs in a semi-closed space such as an underground parking lot, the flow of air flow is smaller than the open space, which can cause the concentration of hydrogen gas emitted from the TPRD to accumulate above the explosion limit. Therefore, in this study, the leakage rate and concentration of hydrogen over time were analyzed according to the diameter of the nozzle of the TPRD. The diameter of the nozzle was considered to be 1 mm, 2.5 mm and 5 mm, and ccording to the diameter of the nozzle, the concentration of hydrogen in the underground parking lot increases in a faster time with the diameter of the nozzle, and the maximum value is also analyzed to be larger with the diameter of the nozzle. In underground parking lots where air currents are stagnant, hydrogen concentrations above LFL (Lowe Flammability Limit) were analyzed to be distributed around the nozzle, and it was analyzed that they did not exceed UFL (Upper Flammability Limit).

• The Korean Journal of Archival Studies
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• no.10
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• pp.65-111
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• 2004

In the modern society, Archives are an available subject to the people of a nation and it is indispensable to build and appropriate access environment in order to connect the users and the registered records stored in the facilities. Specially, the Closed Shelves Access system, based on the notion of "a Policy of Archives Preservation", needs to be fully equipped with an access environment more adequate to its necessities. Hence, this study has analyzed all sorts of environments-institutional, organizational, human, physical and intellectual- from a general perspective in order to activate users to read the archives and based on this, the objective of the research is in proposing a program that effectively provides archives to the users and provides the basis for putting into practice an active access environment. The use of archives is the fountainhead in order to preserve archives. By using the archives, the meaning of preserving them is maximized. Whether these archives may be used or not will depend on the quality of information and the advancement of the access environment. Therefore, in order to motivate users to access the archives, first of all the facilities and the archivists must establish norms regarding the access, based on statutes and once they have been settled, they should provide other changes such as ; the development and fixation in the organization's structure, the education of specialized human labor, the expansion of physical space and the facilities and diverse positive services.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.11a
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• pp.156-161
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• 2009

This study was motivated by the fact that the current tendency of social integration in apartment complex is not fully performed its functions as a recovery from the community. The purpose of the study is to provide basic data to be useful for living environment of apartment complex, through comparative analysis of residential conditions, community consciousness, and community facility using behavior of residents in national rental housing and condominium. The results are as follows. 1) Condominium's residents have high level of community consciousness compare to the national rental's. Even though both targets were generally above the average, housing and construction standard are required to reconsider for the enhancing of community consciousness of residents. 2) To activate the use frequency of community facility, the development and operation of the community program and the community space and facilities are constantly considered in the follow-up studies. 3) The more residents have high community consciousness, the more they use the community facilities.

• Korean Institute of Interior Design Journal
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• v.14 no.4 s.51
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• pp.62-69
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• 2005

This study shows the present conditions and the appraisal of Public-Toilet in ammusement park of Kangwon-Do. The areas of Public-Toilets are various from over $30m^2\;to\;230m^2$ and the construction costs are also various. The exterior designs aim at Provincial characteristics, traditional images, or modem minimal styles. The floor plans are usually symmetric forms by rectangular or circular spaces. There are some laws and manuals from related association to regulate Public-Toilet. By appraising with these laws and manuals we can notice that there are many problems to improve in Public-Toilet. As the survey, we can find that the unpreparedness of the cognition equipment about whether someone uses the public-toilet has most frequency in related laws. And by the laws about multipurpose toilet, the insufficiency of the accessing space to the chamber pot has most frequency. By the manual of related association, there are much more indications - for example, the unpreparedness of wind protection room or etiquette bell, so on - than by related laws. For the improvement of the culture In Public-Toilet, we should not only improve the related laws, but also activate the deliberation about the appropriate planning in Public-Toilet.

• Journal of the Korean Geographical Society
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• v.34 no.3
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• pp.247-264
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• 1999

In this study, I investigate how city parks have been created, and what are some characteristics of the location and function of 69 city parks in Tokyo. The city parks in Tokyo have been made in three patterns. The first is planned parks which have been created as a urban facilities considering the scales and types. The second is memorial parks which have been made to memorialize the national monumental event or to preserve natural and cultural resources. The third is public property parks which have been made by occurrence of public vacant land which is resulted from the grant of Royal Garden, restoration of public rented ground, producton of reclaimed land, utilization of dry river bed. The city parks can be classified in five patterns according to distance from CBD and park area. The first is central parks which have historical characteristics strongly. The second is planned parks that are specialized functionally. The third is large scale urban edge parks which are located in the edge of 23-Gu(district) in Tokyo. The fourth is hill parks which have natural characteristics strongly. The fifth is waterside parks that are located along a lake, a pond, a river, or artificial waterside facilities. From this study I have found out that a great effort has been made to activate the utilization of parks for residents in Tokyo, through mnagement goals and ways of parks, composition and chatacteristics of park facility resources, various Events, residents participation in undertaking of parks.

• Journal of the Korean Society of Industry Convergence
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• v.26 no.1
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• pp.105-112
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• 2023

We analyze the global market for flexible electronic circuits, technical considerations, and analyze the market for application areas and regions. In the market analysis of the application field, the display field has the greatest influence in terms of market size and annual growth rate, and the OLE D lighting market size is expected to grow by nearly 50% in 2026. The multilayer flexible electronics, which dependently requires the semiconductor technology, has a larger market size than other structures and its growth rate is relatively large, leading the market and will be further analyzed in depth. The market size of multilayer flexible electronics applied to display field is expected to show an annual growth rate of 21.1% from $2.7 billion in 2017 to $9.8 billion in 2026, and the OLED market is expected to grow by 75.2% during the same periods. Recently, as electronic products have been miniaturized and advanced, and robust installation in a small space is required, companies that preoccupy multilayer structure or rigid flexible electronic circuit technology have an advantage in competitiveness, so many companies are trying to obtain this technology. These efforts are systematically supported by many countries because they can achieve mutual growth by strengthening the competitiveness of the application field and the same industry. In the case of Korea, a support system is established, but it is required to expand and activate it, and to localize manufacturing equipment and materials.

• The Journal of Sustainable Design and Educational Environment Research
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• v.10 no.1
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• pp.64-73
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• 2011

Jung-gu in Daegu is an old downtown that has led the development of Daegu as a representative center and a commercial area with historicity and placeless. However, an urban center is losing its vitality due to the transfer of city halls and the development of new towns. The downtown area that is still important in a city should lead urban development continuously so that it needs to return its vitality by rehabilitating the weakling urban center. Accordingly this study makes the school which shows drop in the number of students and classes in the school buildings located in Jung-gu, Daegu. Consequently this study figures out a cause for the occurrence of unused school facilities and find a solution as the space for local residents by investigating the facilities of schools, the surroundings, the reality, and the present condition. This study is conducted to examine actual situations of a downtown area that has gone through development and history of Daegu as a center. To this end, it aims to seek for methods to activate the city by relating the practical use of unused school facilities.

• Journal of the Korean Institute of Rural Architecture
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• v.7 no.2
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• pp.9-20
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• 2005

The conventional markets in small towns have showed a different trend, compared with those of urban district. As the conventional markets, which are located in urban districts, are being depressed, those in small towns are being activated by each local government. The activation of conventional market is being recognized as an important means for developing communities, and the project for fostering conventional market is being competitively carried out by each local government. The active center of conventional market is constituted centering on the central area of the market. However, in case of the small towns' conventional markets, it is known that the market site, which is secured at market day, heavily influences on the central area. Thus, in order that the small towns' conventional markets may be activated, securing territories of conventional markets and market site should be considered. Altogether, in order to activate the conventional markets, some conclusions were derived as follows: Expanding market site through improving the usability of space by territories, Controlling peddlers by territories and balancing business items, Amplifying the convenient facilities for users, Securing and improving the central area, Standardizing the facilities that were installed by stores and peddlers.

• Journal of the Korea Society of Computer and Information
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• v.21 no.12
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• pp.179-187
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• 2016

In this paper, we propose that it is necessary to expand the programs in the future, Iand it should be possible to activate and to participate the programs continuously, because the higher the participation in leisure program is, the higher life satisfaction.. The Korean Senior Citizens Association has a branch in each province and is used as a place where voluntarily provide friendship activities, hobbies for elderly people aged 65 and information exchange with other leisure activities. However, it was considered to be only a cursory space a few years ago, unlike the activation of leisure programs for the elderly welfare center. The purpose of this study is to investigate the effect of satisfaction of leisure program by type on life satisfaction of users who have experience in elderly university. The subjective health status and the residential type of participating elderly people differ in their life satisfaction. Therefore, it is important for the elderly to have regular health checkups and to maintain a stable residential style. And also, the experiment results show that life satisfaction was higher when leisure program use satisfaction was higher - especially, satisfaction with health program and health care program was higher.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.81-82
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• 2023

Since the COVID-19 pandemic, the importance of remote work has been emphasized, and new digital technologies are rapidly being developed. One such digital technology is the metaverse, which combines reality and virtual space to create an expanded digital world. The metaverse can provide online collaborative spaces that visualize and transmit information and data in real-time. When applied to construction sites, this technology is expected to enable more efficient and stable project management. However, research on construction metaverses, both domestically and internationally, is still inadequate. In this study, 16 influential factors for promoting the application of metaverses to the construction industry were identified through the initial stages of the system dynamics technique. These performance factors were classified into four categories: systemrelated factors for metaverse site construction, device-related factors, user-related factors, and construction site-related factors. It is expected that this study will promote research on the activation of Con-Metaverse by developing casual loop diagrams(CLD) to identify the relationship between each performance factor and constructing stock & flow diagrams(SFD) for simulations in future studies.