• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.2
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• pp.1-14
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• 2023

This study derives quantitative data on how much the fiscal deficit of subway operation agencies can be reduced in the process of charging free rides for the elderly in metropolitan subways during peak periods. In smart card data, every trip of elderly is recorded except fares. Therefore, it is required to establish a methodology for estimating the fares of elderly passengers and distributing them to subway opertation agencies as income. This study builds a simultaneous dynamic traffic allocation model that reflects the assumption that elderly selects a minimum time route based on the departure time. The travel route of the elderly is estimated, and the distance-proportional fare charged to the elderly is calculated based on this, and the fare is distributed by reflecting the connected railway revenue allocation principle of the metropolitan subway operating agencies. As a result of conducting a case study for before and after COVID-19 in 2019 and 2020, it is analyzed that Seoul Metro's annual free loss of 360 billion won could be reduced 6~8% at the morning peak (07:00-08:59), and 13~16% at the morning and afternoon peak (18:00-19:59).

• Journal of the Korean Applied Science and Technology
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• v.40 no.2
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• pp.348-354
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• 2023

A tattoo is a cultural form that has been handed down to mankind for a long time. Traditional tattoo customs that have been handed down and developed in the various cultures of mankind have the important value of academic research in various fields such as history, art, society, etc. The Derung people, one of the minorities living in Yunnan Province and nearby areas in the southwest of China, have 'facial tattoo' customs. The traditional culture of the Derung people, which had maintained the form of primitive society until 1949 when the People's Republic of China was established, was passed down through oral tradition, so there are no preserved materials about their tattoo culture, showing the need for research on the culture. Therefore, it was conducted in two ways: a research on modern and contemporary literature and a field trip to Yunnan Province. The exact reason and time of facial tattoo customs are unknown, but the customs disappeared after being banned in 1966 due to the Chinese Cultural Revolution. The symbols and functions of facial tattoos can be largely divided into four categories, including religious worship, coming-of-age ceremonies, aesthetic decorations, and ethnic and social history, through an on-site survey and research by modern and contemporary scholars. And, it is known that women of the Derung People get tattoos from the age of 7 to 8. The design of facial tattoos became more complicated for upper-class women and simpler for lower-class women depending on the area they live. Tattoos are mainly performed by relatives, and mainly bamboo skewers and lixivium extracted from the bottom of the pot are used as the materials. Currently, there are fewer than 25 women of the Derung people with facial tattoos, and most of them are elderly. Therefore, they seem to disappear altogether within a few decades. Therefore, it is urgent to have documentation on the unique facial tattoo culture of the Derung people.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.43 no.3
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• pp.353-362
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• 2023

In this research, the usage status and characteristics of user big data of Mobike, a dockless bike sharing service introduced in Suwon city, were analyzed, and multiple regression analysis was performed to identify factors influencing the demand for dockless bike sharing service. For analysis, usage data of bike sharing system in Suwon city in 2019 were obtained, and they were organized by areas. As a result of analyzing the characteristics of the influencing factors selected for each area, it was found that the extension of bicycle roads shows high in areas with high demand for bicycles or adjacent areas. Also, the population of 10-30's shows high in areas with high demand for bicycles or adjacent areas. In addition, it was analyzed that the use of bike sharing system is high in areas with high maintenance rate of bicycle roads and large-scale residential and commercial facilities near residential districts and adjacent areas. As a result of the multiple regression analysis, it is analyzed that length of bicycle·pedestrian roads (non-separated), population of 10-30's, number of railway stations, number of schools, number of commercial facilities, number of industrial facilities factors were significant. It is expected that it may be possible to create an environment in which citizens want to use dockless bike sharing service by identifying factors affecting the number of stationless shared bicycles. Also, the results of data analysis are considered to be contributing to policy data to promote the use of dockless bike sharing.

• Journal of Popular Narrative
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• v.25 no.4
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• pp.289-319
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• 2019

Kim Chan-sam's 『世界一周無錢旅行記』 was released in 1962. This was a time when the general public was strongly restricted from traveling abroad. Most of the people lived in 'domestic'. Low development and political upheaval continued. The readership wanted a fantasy, which came out of a desire to escape from the peninsula. So was to become more popular around the popular characters called 'Kim Chan-sam'. Kim Chan-sam had to be a pushover to the public. This figure had to be secular and de-politicized. Above all, ideological bias had to be removed. The book's imaginary geography is the "world as a non-communist state" with a high purity. The Cold War ideology was prevalent throughout South Korean society. Kim Chan-sam knew exactly what he could and could not tell the South Korean reader. He couldn't tell you the reality of my readers not being able to travel abroad. Not to mention a society locked up 'domestic' on the Korean reality. The study analyzes Kim Chan-sam's storytelling strategy. Looking at the meaning of the travel fantasy,agenre of the 1960s, I would like to ask why travel writing in our time is still bound by its past limitations.

• Journal of Naturopathy
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• v.8 no.1
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• pp.40-51
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• 2019

Purpose: The purpose of this study was to investigate the satisfaction of school career education activities (Career counseling, Career and career experience, Career camp, Entrepreneurship and entreperneurship experience, Field trips, University or major experience, and Creative experience activities) in Jeonju high school and Gunsan high school students (568 students), and then to analyze career decision-making self-efficacy of its goal selection, job information, problem solving, and future plan by high (a), middle (b), and low (c) groups according to satisfaction level. Methods: After the career counseling training, questionnaires were surveyed. Results: Career decision - making self - efficacy was significantly higher in the a group than in the b & c groups by order of a>b>c group in the goal selection, job information, problem-solving and future plan by the educational satisfaction on career counseling, career and career experience, college or major experience, creative experiential activity classes (p<.001). The average satisfaction level of career camp, and entrepreneurship and creative experience class was a> c> b group order. There was not a statistically significant difference between the a, b, and c groups. Average satisfaction of field trip class showed a>c>b group order, and a group was significantly higher than b & c group. Conclusion: The higher satisfaction of career education shows higher self-determination efficacy of goal selection, job information, problem solving and future plan.

• The Journal of Bigdata
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• v.6 no.2
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• pp.139-149
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• 2021

Ddareungi, a public bicycle service in Seoul, establishes itself as a means of daily transportation for citizens in Seoul. We speculated that the pattern of using Ddareungi may have changed since COVID-19. This study explores changes in using Ddareungi after COVID-19 with descriptive statistical analysis and network analysis. The analysis results are summarized as follows. The average traveling distance and average traveling speed have decreased over the entire time in a day since COVID-19. The round trip rate has increased at dawn and morning and has decreased in the evening and night. The average weighted degree and average clustering coefficient have decreased, and the modularity has increased. The clusters, located north of the Han River in Seoul, had a similar geographic distribution before and after COVID-19. However, the clusters, located south of the Han River, had different geographic distributions after COVID-19. Traveling routes added to the top 5 traffic rankings after COVID-19 had an average traveling distance of fewer than 1,000 meters. We expect that the results of this study will help improve the public bicycle service in Seoul.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.3D
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• pp.317-323
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• 2008

Mass transit information can contribute many benefits to users. Especially, transportation information technology is developing highly with information technology in Korea recently. Hereafter, it is expected to give customized transportation information to users individually with the advent of ubiquitous age in earnest. This public transportation information service can be realized by path finding algorithm in public transportation networks including travel and transfer attributes. In this research, constraints are constructed with the primary facts influencing users. Moreover, the method reducing user's path finding condition arbitrarily is proposed by making the maximum value as variables. In this study, transfer frequency, total travel time, seat confirmation, transfer time and travel time become constraint condition based on k path finding algorithm considering service time constraint condition. Moreover, case study about user customized transfer information is performed in Seoul and metropolitan subway networks.

• The Journal of Korean Philosophical History
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• no.28
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• pp.155-182
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• 2010

When we divide Environmental Ethics education into the elements of 'knowledge - emotion - behavior', we need to focus on 'knowledge' at high school level. In general Moral Education, 'knowledge - emotion - behavior' is a circular link, but as Environmental Ethics is a matter of 'consciousness', it is desirable to instruct with the process of 'knowledge>emotion, behavior'. Teaching 'Consciousness on Nature' is not recommended at elementary or middle school level because it demands higher inference. On the contrary, considering the reality in high school it is not recommended to teach the necessity and method of recycling or to go field trip to the polluted area. Rather, it is better to inform the students of Environmental Ethics' viewpoints and let them know the ways of moral judgments. The view of nature in Orientalism is well explained through the Environmental Ethics' viewpoint. To explain the view of nature in Orientalism we should concentrate on the theory, not on the attitude of life. And we should rather compare the viewpoints of nature in Confucianism, Taoism and Buddhism respectively than explain in Orientalism all together. That is, if we compare with the viewpoints of Environmental Ethics and explain similarities & differences in Confucianism, Taoism and Buddhism, we can complement Environmental Ethics or present the third approach.

• Journal of Practical Agriculture & Fisheries Research
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• v.18 no.1
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• pp.101-112
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• 2016

Monitoring and control of the greenhouse environment play a decisive role in greenhouse crop production processes. The network system for greenhouse control was developed by using recent technologies of networking and wireless communications. In this paper, a remote monitoring and control system for greenhouse using a smartphone and a computer with internet has been developed. The system provides real-time remote greenhouse integrated management service which collects greenhouse environment information and controls greenhouse facilities based on sensors and equipments network. Graphical user interface for an integrated management system was designed with bases on the HMI and the experimental results showed that a sensor data and device status were collected by integrated management in real-time. Because the sensor data and device status can be displayed on a web page, transmitted using the server program to remote computer and mobile smartphone at the same time. The monitored-data can be downloaded, analyzed and saved from server program in real-time via mobile phone or internet at a remote place. Performance test results of the greenhouse control system has confirmed that all work successfully in accordance with the operating conditions. And data collections and display conditions, event actions, crops and equipments monitoring showed reliable results.

• The Journal of Engineering Geology
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• v.34 no.2
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• pp.217-228
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• 2024

During deep drilling, confined aquifers can present various challenges such as the inability to remove cuttings, rapid groundwater influx, and mud loss. Particularly in flowing well conditions, it is essential to apply the suitable mud density since the aquifer can generates an overpressurized condition. This paper proposes a method for determining the suitable mud density while drilling (SMD) through confined aquifers using mud window analysis and applies it to a case study. The minimum mud density at each depth, which represents the lower limit of the mud window, is determined by the equivalent mud density pore pressure gradient (or by adding a trip margin) at that depth. The pore pressure gradient of a confined aquifer can be calculated using the piezometric level or well head pressure of the aquifer. As the borehole reaches the confined aquifer, there is a significant increase in pore pressure gradient, which gradually decreases with increasing depth. The SMD to prevent a kick can be determined as the maximum value among the minimum mud densities in the open hole section. After entering the confined aquifer, SMD is maintained as the minimum mud density at the top of the aquifer during the drilling of the open hole section. Additionally, appropriate casing installation can reduce the SMD, minimizing the risk of mud loss or invasion into the highly permeable aquifer.