• Korean Journal of Social Welfare
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• v.62 no.2
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• pp.329-348
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• 2010

Following the welfare state typology well known, the typology in terms of individual system in welfare state has been widely examined and, pension which is the biggest and most important in welfare state has been classified into Beveridge and Bismarckian types based on their pension system design. Such typology focused on benefit type or size of private pension has been recently refined to add a new type - 'Bismarckian Lite' type - in addition to traditional Beveridge and Bismarckian types. Whereas the pension reforms in the developed countries has been changes within their pension regimes, the Korean pension reform in 2007 seems to have changed the existing social insurance type into the 'Bismarckian Lite' type. However, considering the immaturity of Korean pension regime, it is difficult to conclude the existing status of the Korean pension regime and, the Korean one can be classified into a multi-pillar one. Over the last decades the developed countries have increased the size of private pension regardless of their original pension regimes, which tends to converge into multi-pillar schemes. Accordingly, there is recently a new typology focused on the degree of regulation in terms of private pensions, which seems to be the better perspective. It will be more important how to regulate the (immature) occupational pension as well as the National Pension in Korea. Considering that old age income security in countries where the public regulation regarding private pension was absent has been deteriorated, it would be necessary to strengthen the role of government to effectively regulate private pension.

• 한국사회정책
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• v.23 no.2
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• pp.1-24
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• 2016

This paper examines whether the pension systems of the western countries which was traditionally classified into the Beveridgean and Bismarckian pension regime will converge after recent pension reforms in the financial sustainability and adequacy perspective by comparing between UK, Germany and Sweden. As a result of pension reforms for the last 20 years, the gap between the Beveridgean and Bismarckian pension regime will be likely to decrease and, in particular, the tendency to convergency in adequacy is found. Even though it is not jumped to a conclusion that public pension expenditure between the three countries is likely to converge, the tendency to convergency in financial sustainability is also found if the difference of demographic aging between countries is considered. The paper suggests that it is necessary to make agreement between the range of pension expenditure and replacement ratio that western countries suggest in pension debate in Korea, instead of hitherto useless controversy between financial sustainability and adequacy.

• Elastomers and Composites
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• v.47 no.4
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• pp.310-317
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• 2012

A jute fiber surface was modified with argon gas in a cylinder type RF plasma generator to enhance the interfacial bond strength and to optimize the plasma treatment condition. The plasma power, gas pressure, and treat time were varied to figure out any effect of those parameters on the morphology and mechanical strength of jute fibers, and the interfacial bond strength for a model composite with polypropylene resin. As the severity of plasma treatment was increased, the surface of jute fibers became rougher. Gas pressure was less effective in roughening of the surface compared with those of treat time and plasma power. Approximately 25% drop in tensile strength of jute fibers was observed for the parameters of treat time and plasma power, while little deterioration was found for gas pressure, with increasing the severity. Based on the interfacial shear strength (IFSS), the optimum plasma treatment condition was determined to be treat time of 30 s, plasma power of 40 W, and gas pressure of 30 mTorr.

• Economic and Environmental Geology
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• v.57 no.1
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• pp.1-15
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• 2024

The Melanesian region in the western Pacific is dominated by complex plate tectonics, with the largest oceanic plateau, the OntongJava plateau, and a hotspot, the Caroline Islands. To better understand the complex geodynamics of the region, we estimate P- and S-velocity models and 𝛿 (V_P/V_S) model by using relative teleseismic travel times measured at seismometers on land and the seafloor. Our results show high-velocity anomalies in the subduction zones of the Melanesian region to a depth of about 400 km, which is thought to be subducting Solomon Sea, Bismarck, and Australian plates along plate boundaries. Along subduction zones, positive 𝛿 (V_P/V_S) anomalies are found, which may be caused by partial melting due to dehydration. A broad high-velocity anomaly is observed at 600 km depth below the Ontong-Java plateau, with a negative 𝛿 (V_P/V_S) anomaly. This is thought to be a viscous and dry remnant of the Pacific plate that subducted at 45-25 Ma, with a low volume of fluids due to dehydration for a long period in the mantle transition zone. Beneath the Caroline Islands, a strong low-velocity anomaly is obseved to a depth of 800 km and appears to be connected to the underside of the remnant Pacific plate in the mantle transition zone. This suggests that the mantle plume originating in the lower mantle has been redirected due to the interaction with the remnant Pacific plate and has reached its current location. The mantle plume also has a positive 𝛿 (V_P/V_S) anomaly, which is thought to be due to the influence of embedded fluids or partial melting. A high-velocity anomaly, interpreted as an effect of the thick lithosphere beneath the Ontong-Java plateau, is observed down to 300 km depth with a negative 𝛿 (V_P/V_S) anomaly, which likely indicate that little fluid remains in the melt residue accumulated in the lithosphere.