• Water for future
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• v.10 no.1
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• pp.7-11
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• 1977

• The tire
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• s.91
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• pp.2-9
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• 1980

• Defense and Technology
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• no.12 s.24
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• pp.40-50
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• 1980

• Defense and Technology
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• no.6 s.18
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• pp.20-32
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• 1980

• Korean Journal of Soil Science and Fertilizer
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• v.40 no.3
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• pp.196-200
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• 2007

This study was to determine long-term changes of polycyclic aromatic hydrocarbons (PAHs) in paddy soils. To do this, we analyzed 16 PAHs in soil samples which were stored in the archive of Yeoungnam Agricultural Research Institute, Milyang, Kyeoungnam province, Korea. The samples used in this study were collected every year from 1978 to 2001 at the plough layer (0-12cm). In average, total PAHs accumulated in paddy soil was continuously decreased since 1980 when it peaked to be $237g\;kg^{-1}$. No significant changes were observed for PAHs having 5-6 phenyl rings for the past two decades, whereas PAHs with 3-4 phenyl rings were greatly decreased, reaching at about a half levels of the 1980's. It is worthy to be noted that the large reduction in PAHs with 3-4 phenyl rings has mainly been attributed to the decrease of PAHs in paddy soils for last 20 years. The major compounds accumulated were: phenanthrene > fluoroanthene > chrysene/benzo(b)fluoroanthene. The present results suggest that the switch of main fuels used in Korea from coal to petroleum around at the end of 1970's is likely contributed to decrease in PAH accumulation in paddy soils.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.613-621
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• 2009

Except for traditional industrial art and history of design development, Korea jewelry industry before 1980's, had little meaning in the aspect of marketing and business. Domestic jewelry market which have changed from the value of goods to value of ornaments, faced important transition point for jewelry industry by the chance of in Asian Game held in 1986, and money of overseas traveler after 1980s. The rapidly-grown Jewelry field by the introduction of detail casting method to make it possible mass-production of the products before 1990's, began to change into new system, with introducing CAD/CAM after 1990's. Jewelry industry has changed from manual work called handmade to the detail casting industry based on master for mass-production. For this, the development of master, with the design development, have been suggested as important task to jewelry industry firms, and by the introduction of CAD/CAM, the diversification of design and master development has been made up. In this study, we would try to find out current status of domestic jewelry field and to understand CAD/CAM, and advantage of CAD/CAM, and through this, suggest good solution to precipitate domestic jewelry market.

• Journal of the Korean association of regional geographers
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• v.13 no.1
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• pp.82-103
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• 2007

Neoliberalism can be seen as a path-dependent, hybrid and contradictory project that operates actually (not just ideologically) through intervention of the state that has been not weakened in its strength but different in its strategies, especially through neoliberal policies of remaking urban space. This paper seeks to characterize the development of neoliberalism and urban policies in S. Korea, by examining the trajectory of neoliberalism generated in its contextually specific way since the late 1980s, by illuminating the intersection between new neoliberal programs and the existing developmentalism of the state and changes in spatial policy with its effects, which can be divided into two phases: the first from the late 1980s to the economic crisis in 1997, and the second from the crisis to the present. This paper finally identifies several paths in which the state and the market would be interrelated, and argues that the vision of national development and spatial policy should be welfare(i.e. human)-oriented, not industry(i.e. capital)-oriented.

• Journal of the Korean Geographical Society
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• v.33 no.1
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• pp.93-107
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• 1998

The purpose of this paper is to examine the change in the regional characteristics of Y${\={o}}$ju as its economic base has been shifted. From Chosun Dynasty to the mid 1960s, Y${\={o}}$ju had been known as a core of rice production, utilizing favorable natural conditions and well developed river transportation system, with commercial and administrative functions. From the mid 1960s to the mid 1980s, Y${\={o}}$ju had been excluded from the process of the national industrilization, which made Y${\={o}}$ju remain lagged. The transportation system was blocked and the industrial investment in this area was prevented by a variety of restrictive laws. Since the mid 1980s, Y${\={o}}$ju entered into a prosperous are as the land transportation system began to be dramatically improved and some of the restrictions were alleviated. Tecently, diversification and commercialization in the agricultural sector have progressed in land use. In the manufacturing sector, Y${\={o}}$ju becomes a core of the pottery industry in tems of the total amount of its production.

• Journal of the Korean Geographical Society
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• v.28 no.3
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• pp.200-212
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• 1993

Wholesaling is important industry that is remarkable by the function and characteristics of city. This paper aims at examing the recent changes in hierarchy of cities and city classifi-cation by wholesale activities in Korea. In order to grasp the stydy purpose, this paper is to analuze the changes of categories by wholesale industry, and to grasp the change in the city classification with city hierachy of wholesale sales in 1968, 1979, and 1991. The data were obtained from the statistics in the Census of Wholesale and Retail Trade published by the National Statistical Office, in 1969, 1981, and 1992. As the result of examination, the following finding were obtained: 1. Wholesaling has developed form that of production and consumption goods wholesale, especially 'Wholesaling of Farm Products, Foods and Beverages' to that of investment goods that is 'Wholesaling of Machinery and Equipment' and 'Wholesaling of Transport Equipment and Parts'. 2. Wholesaling has developed in the medium and small cities in 1970's, and in the larger cities in 1980's. And the concentration ratio of six larger cities were lower than another cities in terms of wholesale sales, especially Seoul and Pusan. 3. Recently with income increment and a purchasing power, city classification was changed by the increasing number of wholesale establi-shments of 'Automotive Parts and Tyres' in 1970's and of 'Office, Computing and Accounting Machines and Motor Vehicles' in 1980's.

• Korean Journal of Social Welfare
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• v.63 no.2
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• pp.233-260
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• 2011

This study intends to analyze the trend of employment rate of men aged 55~64 in 15 OECD countries from 1980 to 2005. Furthermore, this study means to examine the determinants of men aged 55~64 in 15 OECD countries to support the labor force participation among them. The analysis is based on the data of OECD, ILO and LIS. The analysis method is Arellano and Bond(1981)'s difference GMM which used instrumental variables by dynamic panel model which estimates state dependency of labor market participation and individual panel's heterogeneity. The main results from this analysis are summarized in three points. First, the employment rates of men aged 55~64 had decreased until the middle of the 1990s, while that has been increasing since 1995. Second, the sate dependency strongly worked in the employment rates of 55~64 men and positive period effect was observed for 1980~2005. This study cannot find the pull effect of public pension, while labor market push effect have negatively affected. Third, temporary work rates had contributed to increase the employment rate of men aged 55~64 for 1996~2005. The poverty has become the mechanism of the labor.