• Explosives and Blasting
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• v.39 no.3
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• pp.24-34
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• 2021

Electronic detonators are widely used in various construction sites due to accurate delay time. Including the cases with exceeded noise and vibration from site using electric/non-electric detonator, electronic detonators are used to improve blast fragmentation or to reduce the cost of secondary partial blasting. Furthermore, the number of cases using electronic detonators are increased for reduction of the cost and construction period by maximizing operations efficiency. This case study is about applying electronic detonators on large section station, tunnel construction site which is the part of urban area GTX A project. Although it was initially planned to utilize non-electric detonators, damage was inflicted on safety-thing. We have considered blasting method using electronic detonators as solution of this problem. By applying electronic detonators, we not only satisfied environmental regulations but also prevented nearby safety-thing from getting damaged. In addition, we were able to shorten the construction period than the initial plan by conducting single simultaneous blasting on large section station, in order to ensure safe and efficient construction.

• Journal of Climate Change Research
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• v.8 no.3
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• pp.265-273
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• 2017

Recently the Paris Climate Change Accord has been officially put into effect, making global efforts to implement Greenhouse Gas (GHG) reductions, and also International environmental regulations in the automotive sector will be further strengthened. The electric vehicle, which minimizes the particulate matter generated by existing internal combustion engine automobiles, is evaluated as a representative eco-friendly automobile. However, charging the battery of an electric vehicle is not fully environment-friendly if it is fueled by electricity that is being generated by fossil fuels as an energy source. The energy generated by the photovoltaic power generation system, which is an infinite clean energy, can be used to charge an electric vehicle's battery. Currently, shortage of charging facilities, time of charging, and high battery prices are the problem of activating the supply of electric vehicles. This study is to build a conjunction between the EVBSS (Electric Vehicle Battery Supply System) and ESS (Energy Storage System), which can quickly supply the photovoltaic charged battery to the required demand. If the charged battery in the Battery Swapping Station (BSS) is swapped swiftly, it will dramatically shorten the waiting time for charging the battery. As a result, if the battery is rented when it is needed, electric vehicles can be sold without the cost of a battery, which accounts for a large portion of the total cost, then the supply of electric vehicles are expected to expand. Furthermore, it will be an important alternative to maneuver climate change by minimizing GHG emissions from internal combustion engine vehicles.

• Journal of the Korean Institute of Educational Facilities
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• v.26 no.3
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• pp.43-50
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• 2019

Nowadays, the knowledge of modern society through education has become more and more complicated. The education system and the educational philosophy have created various education systems and methods for each country due to the difference of history and culture. In Korea, there are various teaching methods in recent years. However, if the traditional teaching method in Korea is based on educating teachers with a good understanding of the contents taught, some foreign countries such as USA and Germany can express their thoughts of the total population. In this situation, this study researches cases of other countries that have different educational systems from ours. It compares the differences of social background, educational program, and educational space in Germany, Singapore and the United States. As a result of this study, the following contents can be derived. The educational program is based on the social background of each country and plans an educational space suitable for the education program. In Germany, the emphasis is on the students' experience and community consciousness rather than on the amount of knowledge, so a home base space is planned between the classrooms to solve the problem of lack of solidarity and belonging among the students who are lacking in the curriculum. Some practical courses are run in the community. In Singapore, educational programs are elite-oriented compared to the other country, and because of the typical tropical climate, educational facilities are characterized by a lot of common space in semi-exterior space. Many schools in the United States have IMC in the central part of their schools that adopt self-directed learning and discussion.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.36 no.2
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• pp.79-86
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• 2020

In order to accommodate the increase in urban population due to government-led national planning and economic growth, many buildings such as houses and business building were supplied. Although the building law was revised and managed to manage the supplied buildings, for the sake of economic benefit, there have been buildings that are enlarged or reconstructed without declaring building permits. In order to manage these buildings, on-site surveys were conducted. but it has many personnel consumption. To solve this problem, a method of using a satellite image and a manned aircraft is utilized, but it is diseconomical and a renewal cycle is long. In addition, it is not utilized to the height, and although it is judged by the shading of the building, it has limitations that it must be calculated individually. In this study, height of the building was calculated by using the unmanned aerial vehicle with low personnel consumption, and the accuracy was verified by comparison with the building register and measured value. In this study, spatial information was constructed using a fast unmanned aerial vehicle with low manpower consumption and the building height was calculated based on this. The accuracy by comparing the calculated building height with the building register and the actual measurement.

• Land and Housing Review
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• v.13 no.4
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• pp.125-134
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• 2022

Reclaimed aggregates through waste asphalt are produced and utilized for waste resource utilization. This study conducts quality tests and performance evaluations for mixtures with Rejuvenator applied to reclaimed asphalt concrete. Through quality testing and performance evaluation, the study investigates whether there is any problem in using reclaimed asphalt concrete by replacing general hox mix asphalt. As a result, the values of ordinary hot mix asphalt are similar to those of reclaimed asphalt, suggesting that the substitution does not create critical engineering issues. Using reclaimed asphalt concrete has the advantages of increasing economic efficiency and utilizing waste resources.

• The Journal of Bigdata
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• v.5 no.2
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• pp.85-95
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• 2020

In this study, a mobility analysis method is suggested to estimate an O/D trip demand estimation using Mobile Phone Signaling Data. Using mobile data based on mobile base station location information, a trip chain database was established for each person and daily traffic patterns were analyzed. In addition, a new algorithm was developed to determine the traffic characteristics of their mobilities. To correct the ping pong handover problem of communication data itself, the methodology was developed and the criteria for stay time was set to distinguish pass by between stay within the influence area. The big-data based method is applied to analyze the mobility pattern in inter-regional trip and intra-regional trip in both of an urban area and a rural city. When comparing it with the results with traditional methods, it seems that the new methodology has a possibility to be applied to the national survey projects in the future.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.38 no.6
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• pp.553-559
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• 2020

In order to prevent subsidence in urban areas, which is a major cause of damage to aging underground facilities, an integrated underground space map is being produced for systematic management of underground facilities. However, there is a problem of delaying the update time because an unupdated underground facility object is included in the process of updating the underground space integrated map. In this paper, we proposed a method to shorten the update time of the integrated map by selecting only the updated objects required for the update process of the underground space integrated map based on the central point of the underground facilities. Through the comparison of the centroid, the number of search targets is greatly reduced to shorten the search speed, and the distance of the actual location values between the two objects is calculated whether or not the objects are the same. The proposed method shows faster performance as the number of data increases, and the updated object can be reflected in the underground space integrated map about four times faster than the existing method.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.3
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• pp.208-214
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• 2021

It is necessary to consider the suicide problem of the senior citizens according to their occupation rather than simply dividing seniors according to whether they live in rural or urban areas to seek countermeasures against suicide. This study examines factors that influence the suicidal intentions of senior citizens engaged in the agriculture, forestry, and fishing industries using the ranking probit model. As a result, the suicidal intention of senior citizens working in the agriculture, forestry, and fishery industries who felt lonely increased by 3.0%, but the intention to commit suicide decreased by 1.1%, when they value their work, and the intent to commit suicide decreased by 2.7% when they feel a strong sense of belonging to their region. The more family members or relatives they meet every day, the suicide intentions of senior citizens in the agricultural, forestry, and fishing industries decreased by 2.5%. However, since the number of families living together is decreasing every year, there is an inevitable limit on face-to-face contact with family members or relatives. Therefore, it is necessary to establish policy that links the loneliness of senior citizens in the agricultural, forestry, and fishing industries with the effort of public institutions to promote social values.

• Journal of The Korean Society of Agricultural Engineers
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• v.63 no.2
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• pp.11-18
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• 2021

A community-centered smart village process model was developed through the theoretical review of the rural field forum. By analyzing the difference in technology demand according to the digital capabilities of leaders by community type, village types were classified and detailed technologies were defined. The smart village process was proposed to enable residents to operate autonomously by inducing continuous interest and participation of local residents through the conception stage, planning stage, implementation and self-reliance stage, and allowing them to cooperate together. The business model canvas was reconstructed to be used in the workshop. It was applied to the village of Yesan-gun. As a result of running a resident workshop using the business model Cambus, the lack of resident awareness and illegal garbage dumping were presented as the first problems to be solved. The value of the village was set as 'a village that is clean and clean with a sense of residents, and a good place to live', and users were expressed as 'family' and 'outsiders'. It was suggested that we meet frequently to convey the value of the village by using broadcasting and announcements as a channel to convey the value. Core activities were to cultivate residents' consciousness, such as implementing a campaign against illegal garbage dumping, and to establish and guide separate collection sites. When a garbage collection center is installed, it was estimated that around 2 million won per month for management costs, and it was investigated that it was possible to spend an hour or so twice a month to solve the problem of illegal dumping. If a method to derive village projects based on the derived business model canvas is developed in the future, it will be more practical.

• The Journal of the Korea Contents Association
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• v.21 no.8
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• pp.89-107
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• 2021

This study began with the problem of establishing the identity of the region through tourism storytelling and the need for economic and cultural recovery. Thus, we analyze the attributes of tourist-aware tourism storytelling, authenticity through experience in tourist attractions, and structural and causal relationships between behaviors. Studies have shown that the attributes of tourism storytelling's sensibility, educationality, ease of understanding, interest and theme have a significant impact on tourists' authenticity experiences. And it was confirmed that the authenticity experience of tourists has a positive impact on tourists' intentions of visiting and oral intentions. This study is of high academic significance in that it applied the attributes of storytelling, which had been studied in the existing linguistics and humanities, to Namwon, a representative cultural tourist destination in Korea. In addition, in order for Namwon to grow into a global cultural tourist destination, it is necessary to develop tourism storytelling using unique storytelling attributes and local resources, and furthermore, it is meaningful to suggest that various contents and services should be developed.