• Journal of KIISE:Databases
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• v.32 no.2
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• pp.177-192
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• 2005

In this paper, we introduce a structural redundancy method. It reduces the query processing cost incurred when reconfiguring an XML document from divided XML data in shredding XML documents into relations. The fundamental idea is that query performance can be enhanced by analyzing query patterns and replicating data essential for the query performance. For the practical and effective structural redundancy, we analyzed three types of ID, VALUE, and SUBTREE replication. In addition, if given XML data and queries are very large and complex, it can be very difficult to search optimal redundancy set. Therefore, a heuristic search method is introduced in this paper. Finally, XML query processing cost arising by employing the structural redundancy, and the efficiency of proposed search method arc analyzed experimentally It is manifest that XML read query is performed more quick]y but XML update query is performed more slowly due to the additional update consistency cost for replicas. However, experimental results showed that in-place ID replication is useful even in having excessive update cost. It was also observed that multiple-place SUBTREE replication can enhance read query performance remarkably if only update cost is not excessive.

• Journal of architectural history
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• v.23 no.4
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• pp.57-68
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• 2014

The Korean Legation in Washington, D.C., is a proof that Emperor Kojong of Chosun Dynasty tried to establish relationship with the U.S. in 1891, that was before the declaration to establish Korean Empire. In that sense, the building is a historic place. The legation building is a symbolic place attesting to the turbulent history at the time of 1890 to 1910, when Korea had to suffer the forced treaty with Japan in 1905 and the annexation into Japan, and then to the 20th century up to the present time, 2014. The legation building can be turned into a space to host well-planned exhibits to show Korea's history and culture to local residents, foreign visitors to Washington, D.C., and overseas Koreans. The followings are the basic principles for the future use of the legation in line with the basic direction. The building's use should not be limited to museum, but should be flexible to accommodate various different practical usage. It is necessary to make the Korean Legation building that can incorporate the characters and the history through modern interpretation of the historicity of the place, the Korean culture, and historical events. The future usage of the Korean Legation building should enhance the value as a cultural heritage by linking the interpretation of the historical events and real life shown through exhibits, performance and people.

• The Journal of the Korea Contents Association
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• v.21 no.7
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• pp.181-193
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• 2021

Due to the spread of COVID-19, the domestic market was inevitable to face the crisis of tourism industry. Accordingly, most of local festivals decided to cancel or postpone, and have been in difficult situation. In addition, people also have experienced the thrist of cultural activities and tours. However, this situation can also be opportunity to find the clues for activating local festivals in the post-COVID-19 era with estimating the preservation value and deriving the determinants for it. Therefore, this study economically assessed the value of the local festival, Chimac Festival in Daegu, under the hypothetical financial crisis situation for COVID-19. Consequently, monthly income, age and place dependence was found to be influential for Daegu and nearby area citizens to have willingness to pay for the Chimac Festival in Daegu. The result shows that respondents are willing to pay 16,909 on truncated average. Thus, total value of Chimac Festival was estimated as 9.376 billion won.

• The Journal of the Korea Contents Association
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• v.21 no.6
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• pp.663-677
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• 2021

Recently, urban tourism regeneration projects to attract tourists are gradually increasing. Therefore, this paper focuses on social capital, which is a major factor in attracting tourists to revisit for revitalization of such urban tourism areas. Specifically, it looked at one of the social relations formed between tourists and local residents,'the process of revisiting based on attachment to the place by making the formation of social capital perceive empirical value'. As a result, you can see (insert result). This means that the bond between tourists and local residents is an important factor in inducing tourists to revisit actively in the urban tourism regeneration area. Therefore, this study presented implications for academic and practical work based on these results.

• Journal of Agricultural Extension & Community Development
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• v.18 no.1
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• pp.73-99
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• 2011

As multicultural family gradually increased, our society is changing towards multicultural society. This study tried to identify the factors related with social distance of adolescent of multicultural family. The participants were 568 middle school students living in S city, D and H county in Chungnam province. Data for the study were analyzed by frequency, mean comparison, correlation and regression analysis. The study results were summarized as follows. First, there were significant differences in social distance according to gender, school record, and place of residence. Second, there were significant differences in social distance according to degree of intimacy between general adolescents. Third, as a result of correlation analysis, the lower self-esteem was, the lower value orientation was, the lower cultural diversity was; the higher social distance is. Accordingly, social distance for adolescents had negative correlations with self-esteem, value orientation, and cultural diversity. Fourth, variables affecting social distance were gender, school record, family composition, place of residence, friend from multicultural family, intention to be a friend, experience of overseas travel, self-esteem, value orientation, cultural diversity. Among them, intention to be a friend was a main predictor.

• Journal of the Korean Society of Combustion
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• v.15 no.3
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• pp.40-47
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• 2010

Calorific value of mixed gas, like liquefied natural gas (LNG), is strongly depends on its compositions which are affected by the mining place and producing time. The variation in calorific value have an direct influence on the combustion characteristics and performances of boiler, burner, vehicle, power plants etc. Thus, developing experimental method to measure exact calorific value is becoming an issue in the related industrial fields. Flame calorimeter is developed to get calorific value at the dynamic equilibrium state using electric substitution method. Refrigerant-11 carries heat from combustor and/or heater to the Peltier elements which pumped it out to the cooling water. It is found out that error in the measured calorific value of methane is 2.86% compared with the theoretical one. Developed design technique and the experimental data will be applied to design the national standard gas calorific value measuring apparatus.

• Journal of the Economic Geographical Society of Korea
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• v.17 no.1
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• pp.28-44
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• 2014

As the era of glocalization arrives, each area of the world with the uniqueness trying to enhance competitive advantage. In this context, the 'Art asset' should be understood as an independent 'Content' in terms of place marketing & creative regional regeneration. Especially in a place as a component of assets 'art' is recognized as an independent content & as a means for new areas of creative regeneration and the local economy will be discussed. To do this, place the property on the basis of a review of existing research on the concept of a new arrangement of art assets were classified by type and each of the cases examined. Ultimately, through the review of creative play area as a place of art assets and utilize the potential value of plce asset is the goal of this article.

• International Journal of Advanced Culture Technology
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• v.9 no.3
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• pp.221-231
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• 2021

The purpose of this study is to examine the characters and sustainability of built heritage featured in the eight-scenery listings of Gyeonggi municipalities in South Korea. Eight scenery is a place marketing medium that reflects the community's appreciation of the selected resources. For a research method, we utilize framework analysis to understand the cultural resources in three categories: heritage value identification, preservation, and dissemination. Primary sources for data collection include the chosen eleven cities' eight-scenery webpages, the National Cultural Heritage Portal, and articles about the built heritage resources included in the eight scenery. The results of this study show the public's acknowledgment of diverse built heritage, from prestigious monuments to local heritage interpretations, and various preservation and public program development approaches. The conclusion discusses the research findings regarding historic preservation, sustainable development, and place marketing.

• International Journal of Internet, Broadcasting and Communication
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• v.14 no.2
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• pp.70-78
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• 2022

The trenchless entire repair technology (TERT) have many different names depending on the companies, and they have the same or similar methods as well as materials. In addition, there was quiet difficulty in application of field working and even confuse to classify for new TERT, while application criteria of TERT is not listed systematically. This study proposed standardization and method for TERT affecting by pipe condition, working materials, working method, specification/quantity per unit according to field condition, strange affairs and others. Determination criteria of defective sewer pipe has proposed to effective method which modify a criteria between Ministry of Environment and Seoul Metropolitan City. A Cured-in-place pipe (CIPP) is suitable for TERT, and the design criteria for the entire broken pipe are proposed when the pipe itself deforms more than 10%. A check lists are specimen preparing, hardening site made by clamped mold, numbers, flexural and tensile property, water leak and desquamation test, and have to use material property of minimum CIPP value depend on ISO 11296-4, ISO 11297-4, KS M3550-7 and KS M3550-9.

• Journal of Nutrition and Health
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• v.8 no.2
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• pp.31-36
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• 1975

Relative retarding or pro-oxidant effect of 0.02% BHT, 0.01% citric acid and 0.1 ppm $CuSO_4$ $5H_2O$, on the peroxide value and the free fatty acid value development of two groups of edible soybean osils was studied. One group of the oils was stored in a dark place at $40{\pm}0.5^{\circ}C$, and the other group was irradiated 3 hours daily, with direct sunlight. The results of the study were as follow; 1. Peroxide value and free fatty acid value were, in general, more rapidly promoted in the case of the irradiated oils than in case of the oils stored in the dark place. 2. Peroxide value and free fatty acid value were rapidly increased in the case of the sample in addition to $CuSO_4$ $5H_2O $ in both caies. 3. Synergistic effect of citric acid on BHT was strong pronounced in both cases.