• Journal of the Korea Convergence Society
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• v.9 no.9
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• pp.191-197
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• 2018

With a population of more than 10 million people worldwide, MegaCity was only three in 1975, but it is expected to grow to 24 in 2013 and more than 30 in 2025 and more than 3 billion worldwide by 2050 It is expected to be absorbed into smart city. Especially in Asia and Africa, urbanization is expected to proceed rapidly. As the urbanization progresses and the population living in the cities increases, there are various problems such as rapid increase of energy consumption, congestion of traffic, various aging of the infrastructure and the like. As a result, smart city is emerging as a new alternative for solving urban problems. Smart City is rapidly expanding with the development of related technologies and can improve costs, improve urban services, improve quality of life, productivity and sustainability. Therefore, this paper analyzes the size and trend of the domestic and overseas smart city market, and analyzes the smart city related policies, trends and case studies of major countries to see the development status and market of smart city related industries, Present a business utilization model.

• The Journal of the Korea Contents Association
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• v.8 no.12
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• pp.347-356
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• 2008

In this study, in order to evaluate the 4th local government heads and to grope for ways for development of the government, the researcher surveyed public officials in Daejeon, Chungnam and Chungbuk regions. The main contents of the survey were such as the leadership type and characteristics of the local government heads, their administrative characteristics, and evaluation of their pubic pledges. And for the surveyed questionnaires, the researcher did cross-tabulation and analysis of variance using the SPSS 12.0 statistics program. As the result of the analysis, on the basis of most indexes, the provincial governor of Chungcheongnam-do was found to have received more affirmative support than those of Chungcheongbuk-do and Daejeon Metropolitan City. Therefore, it seems that provincial governor of Chungbuk and mayor of Daejeon Metropolitan City need to benchmark the leadership of the provincial governor of Chungnam.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.34 no.5
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• pp.1517-1524
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• 2014

In recent years, the interest of environmental-friendly transportation modes has been growing. This is because of social and environmental problems such as increasing gas price and climate change. In Europe, bike-sharing service, one of the environmental-friendly transportation modes, has been already operated. Bike-sharing service named "Tashu" has been operated in Daejeon city since 2009. This study is a fundamental research to increase utilization efficiency of bike-sharing service and to decide optimal locations of bike stations. In addition this study examines characteristics of bike usage and analyzes factors affecting to demands using multiple regression model. Based on the result of examining of characteristics of bike usage, the rate of bike usage is higher compared with installation rate of public bike stations near parks in Daejeon. In addition demands of bike usage in weekend is higher than in weekday. It reveals that the main purpose of bike usage could be recreational activities. The return rate at the same location with rental station is comparatively high. Moreover, bike usage pattern is biased in specific areas (Dunsan and Yuseong) because bike-sharing stations are not equally located. As a result of multiple regression model, the factors affecting to demands are number of passengers in buses, length of bike lanes, parks, distance to waterfront, and rate of young people. A statistical significance of factors (r-square) is 0.748, which has strong relationship.

• Journal of the Korean GEO-environmental Society
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• v.2 no.3
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• pp.37-45
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• 2001

The characteristics of drinking groundwater quality was analyzed by investigating observed data during 1995-1997 in Daejeon city. As the analysis of observed data, the 30.1% of them were over the drinking water quality standards in Daejeon city and the unfit ratios of each region were 36.4% at Dong-Gu, 32.3% Daedeog-Gu, 31.2% Jung-Gu, 30.0% Seo-Gu and 25.2% at Yusoung-Gu. It was found that the items over the drinking water quality standards were 24 items and all of the mean concentration of water quality items were under the drinking water quality standard except Fe and Mn in 1997. The mean concentration of Fe was $1.31mg/{\ell}$ over the water quality at Daedeog-Gu and that of Mn was $0.53mg/{\ell}$ at Jung-Gu. The concentrations of $NH_3$-N, Mn, Fe, Al and F were increased rapidly in 1997, so that the cause of increasing also must be examined closely. It was found that the rainfall and unfit ratio(unfit frequency/test frequency) of E-coli and bacteria had the hydrologic persistance. The coefficient of correlation between them was 0.525. On the rainfall over 100mm, it was 0.673 and on the rainfall over 150mm, it was 0.641. The correlation between E-coli and rainfall was higher than that between bacteria and rainfall.

• Korean Journal of Oriental Medicine
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• v.13 no.2 s.20
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• pp.53-58
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• 2007

Background and Purpose : The purpose of this study was to investigate that which symptoms are adequate indicator of the Dampness-Phlegm pattern in the stroke patients. Methods : In the time period Jul. 2005 to Sep. 2006, 136 patients with a first-ever stroke admitted in the department of Internal Medicine of Daejeon University Oriental Medical Hospital in Daejeon city, Wonkwang Oriental Medical Hospital in Iksan, JeonJu city were included. Patients were hospitalized within 3 months after the onset of stroke. Stroke patients had been interviewed by resident who studied standard operation procedures in Fundamental Study for Standardization and Objectification of Differentiation and Pattern Identification of Syndrome of Oriental Medicine for Stroke. Gi-deficiency patients was confirmed by medical specialist diagnosis, resident diagnosis, case report form analysis without a dissenting voice. Results : Dampness-Phlegm group included 37 case, Non Dampness-Phlegm group 45 case out of 136 patients. white tongue coating, slippery purse, yellowish complexion, enlarged tongue, swollen tongue were higher among Dampness-Phlegm group. Dampness-Phlegm and Non Dampness-Phlegm patients do not significantly differ in heavy sensation in the head, voice with sputum, teeth printed tongue, borborygmus, dizziness with nausea. Conclusions : This study was insufficiency because sample size is very small. More data from prospective cohort studies will help to Korean Standard Differentiation of the Symptoms and Signs for the Stroke.

• Korean Journal of Ecology and Environment
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• v.42 no.3
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• pp.364-373
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• 2009

We evaluated stream health, based on integrative approaches of qualitative habitat evaluation index (QHEI), chemical water quality and the index of biological integrity (IBI) using fish assemblages in Daejeon Stream during August 2004 - October 2007. The QHEI values in this study averaged 78.2 (n=28, range: 47$\sim$124), indicating "fair" condition based on the criteria of US EPA (1993). The highest value was in the headwater site (S1) that was 112 (good), whereas the value in S3, mid and downstream was SS (fair-poor) that was the lowest owing to a disturbance on the bed and an artificial bank. Concentrations of chemical parameters such as BOD, TP and conductivity increased from the upstream to the downstream due to higher inputs of organic matters and nutrients from the urban area. Conductivity and TP showed a dilution of stream water by rainwater during summer monsoon. Analysis of fish compositions showed that total number of species was 24 and Zacco platypus was predominated (82%). The mean IBI was 17 (range: 12$\sim$30) during four years and the IBI values also decreased from S1 to S4. These results indicated that ecological health was degradated distinctly as the stream goes down through the city-center. We concluded that Daejeon Stream running through the city are influenced by chemical impact such as an influx of domestic sewage as well as the quality of habitat.

• Journal of Korean Society of Forest Science
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• v.100 no.1
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• pp.88-94
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• 2011

This study was conducted to provide on a basic information for maintenance of roadside trees and identify the links between environmental pollution and tree damages (Ginkgo biloba, Platanus occidentalis) in Daejeon City by analyzing photosynthetic characteristics, water use efficiency, chlorophyll fluorescence and chlorophyll contents by the regions and plants. The investigations were conducted at Chungnam national university(CNU) considered as the least air-polluted area compared to other study sites, Daedeok science town(DS) which a new road with little traffic recently was built around, Daehwa industry complex(DIC) and Daejeon station(DS) which an old road with heavy is located around. The photosynthetic capacity of the two species were highest in CNU and lowest in the DS. However the water use efficiency was highest on the contrary to the photosynthetic capacity in DS. Chlorophyll fluorescence and chlorophyll contents were highest in CNU and lowest in DS as the photosynthetic capacity. On all of the test, Ginkgo biloba shows the more favorable physiological responses than Platanus occidentalis.

• Journal of Naturopathy
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• v.11 no.1
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• pp.51-61
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• 2022

Background: There was a need to investigate the interest in beauty and consumption sentiment in beauty shops on COVID-19 among beauty customers in their 20s and older in Daejeon Metropolitan City. Purpose: To investigate the degree of interest in beauty and consumption sentiment of beauty shops according to COVID-19 targeting beauty customers. Methods: A survey was conducted targeting beauty customers in their 20s or older in Daejeon. A total of 263 questionnaires were analyzed using the SPSS 27.0 program. Results: Beauty customers' interest in beauty was above average in hair style, makeup, skin care and body shape management, but nail care was below average. In addition, it was found that there were some statistically significant differences or no difference in beauty shop consumer sentiment due to COVID-19 according to gender, marital status, age, and occupation. It was found that there was a positive (+) correlation between interest in beauty and consumption sentiment of beauty shops due to COVID-19. Conclusion: The beauty interest in beauty of the customers in their 20s or older in Daejeon Metropolitan City and the consumption sentiment of beauty shops on COVID-19 outbreak indicated some statistically significant differences depending on gender, marital status, age, and occupation, or seems no difference. Therefore, it is evaluated that the results will serve as basic data for research in this field.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.3
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• pp.20-37
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• 2023

Although traffic signal installations are continuously expanding, the effect of preventing traffic accidents remains unverified. Totally, 7,045 traffic accident data (such as signal violations) registered with TCS were manually searched for a 7-year period from 2013 to 2019 for 1,602 traffic signals in Daejeon Metropolitan City. The top 20 traffic accident intersections were identified, the traffic accident investigation records and field maps were viewed to compare the driving direction and signal phase of the violated vehicle, and the cause of the traffic accident was divided into insufficient signal operation design (operation) and driver negligence (intentional). Results of the analysis revealed that 75% of traffic accidents occurred in thru-left-turn traffic signals and overlap; moreover, extending the yellow time or operating all red signals due to countermeasures against traffic accidents occurring in yellow signals resulted in reduced traffic accidents. Data indicated that Permissive Left Turn requires improvement with the signal operation. In addition, since The Korean National Police Agency is not computerized for traffic accident sites and signal-related data, the lack of manpower necessitates improvement and utilization of TCS when establishing traffic accident prevention measures. It is believed that it will contribute to signal operation by analyzing vast amounts of data collected in the field and presenting improvement measures.

• Journal of the Korean Geographical Society
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• v.50 no.2
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• pp.203-216
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• 2015

This paper examined the changes of urban system through the network and the flow pattern reflected in daily movement in Korea. Because daily movement reflects trip pattern, urban system formed by inter-city linkages can be recognized in terms of living sphere. While population movements between cities have the number of linkage systems of city network and the number of traffic regions composed of the origin and destination has increased respectively. Nevertheless, spatial extent of Capital region and Busan region has been expanded. In Gangwon-do in which Seoul-oriented high-speed transportation network has developed, separation of living sphere between Yeongdong area and the Soyanggang cultural region formed around Chuncheon was intensified. Living sphere that includes Daejeon and the surrounding cities has been expanded to the southern Gyeonggi-do. The existing living sphere formed in Jeollanam-do was fragmented into the east and west around Mokpo and Suncheon due to the weakened centrality of Gwangju. Living spheres formed by spatial interaction were consistent with regional administrative boundary. Considering the increased interaction between Seoul and its surrounding cities, the development of global city-region centered on Seoul is expected.