• Journal of the Korean Society for Library and Information Science
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• v.21
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• pp.225-248
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• 1991

The paper suggests newly conceptualized information retrieval system on the notion of citation analysis. The paper also criticizes the traditional information retrieval techniques using Boolean logic. The underlying assumption of this paper is that any pair of papers cited by one paper could be strongly related each other in meaning (Co-citation Analysis). And also any two papers to share same references could be similar each other (Bibliographic Coupling), By using graph algorithm, the networks of two kinds of the papers (the citing group, the cited group) is made in the fields of the genetics and the information and library science. The results say that the maps or networks for cited and citing groups can be useful when applied to the paper set made by the broad searching by subjects or keywords.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.05a
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• pp.495-498
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• 2002

Recently, the advent of electro-active papers (EAPap) actuators has been reported. In this paper, the possibility of the actuators is demonstrated. EAPap is a paper that produces large displacement with small force under an electrical excitation. EAPap is made with a chemically treated paper by constructing thin electrodes on both sides of the paper. When electrical voltage is applied on the electrodes the EAPap produces bending displacement. To improve the bending performance of EAPap, different paper fibers-softwood, hardwood, bacteria cellulose, cellophane, carbon mixture paper, electrolyte containing paper and Korean traditional paper, in conjunction with additive chemicals were tested. Two attempts were made to construct the electrodes: the direct use of aluminum foil and the gold sputtering technique. It was found that a cellophane paper exhibits a remarkable bending performance. When 2MV/m of excitation voltage was applied on the paper actuator, more than 3mm of tip displacement was observed out of the 30 mm long paper beam. This is quite low excitation voltage compared to that of other EAPs. The actuation principle of electro-active paper (EAPap) and possible applications are addressed.

• Proceedings of the Korean Geotechical Society Conference
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• 2000.02a
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• pp.79-92
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• 2000

In this paper, comparison of the observed and the predicted ground deformations due to the construction of road embankment with peck drain near the construction site was made. Measurement of the ground deformation at the gasoline stand due to the construction of road embankment was made and it was compared with the predicted deformation results of Finite Element Method analysis made with Elasto-plastic and Elastic visco-plastic models. A well agreement was obtained between the measured and predicted ground deformations.

• Proceedings of the Korea Concrete Institute Conference
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• 1998.10a
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• pp.229-232
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• 1998

Recently it has become general to use the inhibitor with a view to protecting corrosion of rebars in concrete. As the inhibitors used in construction works are almost made in America or Japan, we immediately need to begin home production of inhibitors. In this paper, to estimate the domestic anodic inhibitor of nitrite in comparison with foreign made inhibitor we made some fundamental experiments of setting time, slump and compressive strength. Besides, we analysed the effect of corrosion protection of inhibitor on the ground of corrosion current, resistance to chloride penetration and diffusion of chloride ingress in concrete.

• Proceedings of the Korea Concrete Institute Conference
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• 2000.04a
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• pp.93-96
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• 2000

In this paper, physical properties of planting concrete using Recycled aggregates made with demolished concrete and construction wastes are investigated. According to the test results. It shows that recycled aggregates made with demolished concrete and construction wastes have low physical properties compared with crushed stone. But, recycled aggregates made with construction wastes shows better performance in absorption ratio, unit weight and thermal conductivity than crushed stone. According it is thought that they are available for being applied to planting concrete considering the sides of efficient recycling of construction wastes and saving the manufacturing cost.

• KDI Journal of Economic Policy
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• v.46 no.3
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• pp.25-47
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• 2024

Although there are many news articles of tariff dodging via the rerouting of made-in-China goods through third countries, relabeling these goods as made in Mexico or made in Vietnam, there have been no scientific studies on this issue. This paper provides statistical evidence regarding whether such practices are taking place. Using monthly trade statistics at the most disaggregated level and analyzing data up to 2019, the year before the COVID-19 shock, little evidence of roundabout trade is found. With an extended dataset up to 2023, overall there is little sign of roundabout trade, although some slight signs of roundabout trade are found for Mexico and Vietnam.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.36 no.4 s.107
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• pp.33-40
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• 2004

A white light interferometery (WLI) method for investigating surface microstructure was introduced. Brief description of the principle of this method was provided. The surface structure of various samples, for example, a liner board paper, a pigment coated paper, a intaglio printed paper and a polymer laminated paper were tested and characterized with the WLI method. The data showed the WLI method provided very detailed information about surface topography, which were little affected by the surface condition such as color, opacity, roughness, etc. The data stitching mode of the WLI method could provide high spatial resolution over a large field-of-view, which made it possible to obtain the statistically valid results. Fast and high repeatability also made this method a promising way for investigating the surface micro-structure of paper products and prints.

• Journal of the Korean Society for Precision Engineering
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• v.23 no.12 s.189
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• pp.56-63
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• 2006

This paper describes the development of automatic making system of a frame element for flame prevention. The frame element is made by turning a thin plate and a formed plate on the small pipe. The couple plate(two plates) should be pulled with constant farce to manufacture a good frame element. This is because if the gap between one couple plate and other couple plate is different, it will not prevent flame. In this paper, the automatic making system of a frame element for flame prevention was made, and which could automatically manufacture a frame element. The characteristic test of the made frame element by that system was performed, and its result was very good.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.53 no.1
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• pp.43-55
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• 2004

This paper presents a study on evaluating the reliability indices considering a transmission system. Because successful operation of electric power under the deregulated electricity market depends on transmission system reliability management, quantity evaluation of transmission system reliability is very important. This paper introduces features and operation modes of the Transmission Reliability Evaluation for Large-Scale Systems(TRELSS) Version 6.0, a commercial program made in EPRI, and TranRel-I V3.2, a educational program made in GSNU(GyeongSang National University) for assessing reliability indices of composite power system. The packages access not only bulk but also bus indices for reliability evaluation of composite powers system. The practicality, effectiveness and future works of this methodology are illustrated by demonstrations of two case studies of modified IEEE 25 buses reliability test system using TRELSS and TranRel-I and a brief case study for the KEPCO size system using TranRel-II made in GSNU.

• English Language & Literature Teaching
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• v.12 no.2
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• pp.153-176
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• 2006

This paper examines "Difference in Requests." The study of speech acts is a crucial area in sociolinguistics and ethnolinguistics, and has aided in the development of TESOL. It also provides a useful means of relating linguistic form and communicative intent. This paper concentrated on 3 request strategies, which were requests made with an explanation, requests made without an explanation and no requests. The purpose of this study, and of concern in TESOL, was to discover whether Koreans framed their requests differently under different conditions. Based on these differences, I wanted to ascertain whether Koreans who spoke English as a second language, and who have lived in the United States, frame their requests as they would in their native tongues thus creating the potential for sociolinguistic failure, or use American sociolinguistic style. As the results of the study, it was found that in the majority of cases, Americans made an explanation with a request. In many cases the Koreans living in Korea would not give an explanation when making a request. Rather, they were direct in request. In many cases the Korean speaking English and living in the US had adopted the American request strategy of giving an explanation.