• 환경위생공학
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• 제17권3호
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• pp.75-82
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• 2002

This outline survey of indoor and outdoor radon concentrations in five major cities in Korea was carried out with Electrostatic Integrating Radon Monitor(EIRM) from February to December, 1996 and January to december, 1998. The mean indoor and outdoor radon concentrations in five major cities in 1996 were $21.9{\;}Bq/\textrm{m}^3$ and $9.6{\;}Bq/\textrm{m}^3$, respectively. The mean indoor and outdoor radon concentrations in 1998 were $20.8{\;}Bq/\textrm{m}^3$ and $9.0{\;}Bq/\textrm{m}^3$, respectively. These were below the U.S.EPA radon action level. The range of indoor to outdoor radon concentrations were $0.8{\;}Bq/\textrm{m}^3{\;}~{\;}45.6{\;}Bq/\textrm{m}^3$ in 1996, $0.5{\;}Bq/\textrm{m}^3{\;}~{\;}15.2{\;}Bq/\textrm{m}^3$ in 1998, respectively. The result of our analysis showed that radon concentrations in indoor air were clearly higher than those in outdoor air. Inspection of seasonal distribute pattern indicates the enhancement during winter relative to summer.

• 수산경영론집
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• 제48권1호
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• pp.51-71
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• 2017

We explore each of the three major domestic fishery product markets in South Korea- Frozen Squid, Frozen Hair tail and Dried Anchovy- to assess whether we can find evidence for Law of One Price (LOP) across the five major cities- Seoul, Dae-Jeon, Dae-Gu, Gwang-Ju and Busan. To achieve our aim, we utilize two different types of unit root tests: Augmented Dickey-Fuller (ADF) and Kwiatkowski-Phillips-Schmidt-Shin (KPSS) unit root test. In each of the three fishery product markets, we find evidence in support of LOP among several cities, which confirms that these markets are integrated to a certain extent. In particular, we find stronger evidence of LOP for Dried Anchovy market relative to the other two fishery product markets. Based on our findings, we argue that the Dried Anchovy market exhibits a greater degree of market integration across the five major cities in South Korea compared to the other two fishery product markets. The greater degree of market integration in the Dry Anchovy market is facilitated by its higher substitutability across cities; taken together these findings show that the market for Dried Anchovy in South Korea is more efficient than the markets for Frozen Squid and Frozen Hair tail.

• 한국환경보건학회지
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• 제28권5호
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• pp.71-76
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• 2002

A survey of radon concentrations in both indoor and outdoor atmospheres was carried out using EIRM and Cup Monitor for the period of February 1996 to March 1997. EIRM were used to measure the indoor and outdoor radon concentration at five major cities university. Cup Monitor were also used to measure the indoor radon concentrations at shopping store, office building, apartment, hospital and house in Seoul. The mean indoor and outdoor radon concentrations at the five major cities(Seoul, Daegu, Daejon, Cwangiu and Busan) were 24.1 Bq/m$^3$and 8.62 Bq/m$^3$, respectively. The ratio of indoor to outdoor radon concentrations ranged front 1.7 to 3.9. Inspection of its seasonal distribute pattern indicates the enhancement during winter relative to summer, consistently for both indoor and outdoor air. The results of the survey showed that the concentrations in basements were clearly higher than those in usual living/working places.

• 한국환경과학회지
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• 제10권6호
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• pp.437-444
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• 2001

The characteristic features of surface ozone concentration and the forecasting procedure of high ozone days have been studied. The ozone concentration was continuously measured during 3 years (1997~1999) at air quality monitoring stations in five major cities in Korea. The diurnal variation of surface ozone concentration on high ozone days is characterized by low ozone concentration at night. The ozone concentration Increases continuously after sunrise, In reach a peak at 1500~1600 LST. Thereafter it decreases steadily to a low concentration at sunset. The diurnal and annual maximum of the surface ozone concentration at Seoul were observed in May and June, respectively. The favorable synoptic condition for the high ozone day is divided into 4 different synoptic weather patterns: a high-pressure system from the Sea of Okhotsk, the Pacific subtropical high extending westward, a moving high-pressure system covering the Korean peninsula. and a synoptic system In front of a typhoon. Most of high ozone days occur under the high pressure system in Korea.

• PNF and Movement
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• 제15권2호
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• pp.209-216
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• 2017

Purpose: The purpose of this study was to compare the status of the dementia prevention programs, dementia support centers, and elderly welfare centers in major metropolitan cities to acquire data for future program development and dissemination and the specialization of dementia prevention personnel. Methods: Data were gathered through internet surveys and telephone questionnaires from 15 special demented elderly care centers and elderly welfare centers registered in five metropolitan cities from June 27 to Oct 25, 2016. Results: Dementia care programs were available at 15 centers. Seoul City was running the most diverse dementia programs, and all five cities were spending a significant amount of time on the cognitive therapy program within several dementia programs. In addition, many social workers hosted the program and the frequency of social welfare work was three times a week. Conclusion: To increase the dementia prevention policies' efficiency, an understanding of dementia has already been established. Experts who can provide client-centered, problem-solving programs will play the role of physical therapists and occupational therapists. However, more research is needed.

• 한국조경학회지
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• 제15권2호
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• pp.101-113
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• 1987

The landscape structure of the both pre-industrial and industrial cities should be influenced to the topographical feature , religious thoughts, political ruling system and history. In the major socio-cultural factors in the pre-industrial townscapes in korea, the Feng - Shui(poongsu) which is an acient human settlement organization system based on the “Yin - Yang” principle and “Five Elements” and “Chryaegogong”system were the most important factors to the formation of traditional town scape in Korea. The landscape during the Japanese colonial periods were basically reorganized through change of “Boundary”, “Center” “Direction(path)” and “Domain” which were expressed by distinct traditional townscape in Yi dynasty. The physical shapes, meanings and behaviors of townscape were expressed properly of the intention of the colonization. As changes to the mordern industrial cities, the townscape had been amended landscape elements of the Japanese imperialism to an ideology of rebirth nation. Also as changes to the modern industrial cities, “Boundary”, “Center”, and “Domain” spreaded into the suburbs by funtionalsm and these were expressed an incoherent value system which were the advancement of growth, pursuit policies as well as an advancement of science techniques.

• Asia Marketing Journal
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• 제4권2호
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• pp.1-25
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• 2002

This study tested major determinants of customer satisfaction and loyalty by varying degrees of customers' knowledge level. Also, authors investigated the degrees of those impacts by classifying industries into two groups(service/manufacturing). Based on 4,000 completed surveys from five major cities, authors found the relationship among perceived quality, perceived value, and corporate image with customer satisfaction and customer loyalty. As a result, corporate image(extrinsic cue) was a major determinant to customers who are low knowledgeable and impacts of corporate image on customer satisfaction was stronger in service industry than manufacturing industry.

• 한국수소및신에너지학회논문집
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• 제31권6호
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• pp.522-529
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• 2020

This study evaluated the effect of improving the atmospheric environment based on the premise that the supply of hydrogen fuel cell vehicles (HFCV) will be achieved as many as the number of vehicles presented in the hydrogen economy activation roadmap announced by the Korean government in January 2019. The HFCV supply target (2.7 million passenger cars) suggested in the hydrogen economy revitalization roadmap was logically allocated to the five major metropolitan areas in Korea. Air pollution damage costs by region were calculated by reflecting the basic unit of damage cost to the estimated air pollutant emissions. As a result, it was confirmed that the benefits per unit of some cities in Gyeonggi-do were derived more than major cities in the metropolitan area.

• Environmental Analysis Health and Toxicology
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• 제29권
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• pp.12.1-12.8
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• 2014

Objectives Cohort studies of associations between air pollution and health have used exposure prediction approaches to estimate individual-level concentrations. A common prediction method used in Korean cohort studies is ordinary kriging. In this study, performance of ordinary kriging models for long-term particulate matter less than or equal to $10{\mu}m$ in diameter ($PM_{10}$) concentrations in seven major Korean cities was investigated with a focus on spatial prediction ability. Methods We obtained hourly $PM_{10}$ data for 2010 at 226 urban-ambient monitoring sites in South Korea and computed annual average $PM_{10}$ concentrations at each site. Given the annual averages, we developed ordinary kriging prediction models for each of the seven major cities and for the entire country by using an exponential covariance reference model and a maximum likelihood estimation method. For model evaluation, cross-validation was performed and mean square error and R-squared ($R^2$) statistics were computed. Results Mean annual average $PM_{10}$ concentrations in the seven major cities ranged between 45.5 and $66.0{\mu}g/m^3$ (standard deviation=2.40 and $9.51{\mu}g/m^3$, respectively). Cross-validated $R^2$ values in Seoul and Busan were 0.31 and 0.23, respectively, whereas the other five cities had $R^2$ values of zero. The national model produced a higher cross-validated $R^2$ (0.36) than those for the city-specific models. Conclusions In general, the ordinary kriging models performed poorly for the seven major cities and the entire country of South Korea, but the model performance was better in the national model. To improve model performance, future studies should examine different prediction approaches that incorporate $PM_{10}$ source characteristics.

• 한국경제지리학회지
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• 제2권1_2호
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• pp.103-122
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• 1999

본 연구는 산업경쟁력을 도시경쟁력을 결정하는 주요요인으로 파악하고, 경제의 탈국경화시대를 맞아 무한경쟁의 주체로 부각되고 있는 지방대도시의 산업구조와 산업경제력을 분석하였다. 산업경제력은 지역내 비중, 입지상계수, 성장성, 생산성 그리고 수익성의 지표를 통해 분석하였으며, 현재 산업경쟁력이 높은 주요산업을 선정하였다. 지방대도시가 산업경쟁력 강화를 위해 집중적으로 육성하여야 할 전략산업은 주요산업을 기본으로 하여, 산업환경의 변화, 도시발전방향 등을 참고하여 도출하였다. 지방대도시 산업구조의 분석결과에 의하면, 지방대도시 모두 탈공업화 추세에 직면하여 산업구조 조정의 과제를 안고 있으며, 산업경쟁력은 도시별로 상당한 차이가 드러났다. 인천은 견실한 산업경쟁력 하에서 고부가가치 첨단산업의 발전가능성이 높고, 대전은 도시내 연구개발역량을 활용하는 전자, 통신산업 등의 성장이 예견되는 반면, 부산, 대구, 광주는 취약한 산업경쟁력을 강화하기 위해 주요산업 고도화, 전략산업 육성 등의 대책이 강구되어야 할 것이다.