• Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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• v.3 no.3
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• pp.143-150
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• 1999

Mobile source emissions are important inputs to photochemical air quality models. Since most mobile source emissions are calculated at the county-level, these emission should be geographically allocated to the computational grid cells of a photochemical air quality model prior to running the model. The traditional method for the spatial allocation of these emissions has been to use a "spatial surrogate indicator" such as population, since grid-specific emission calculations are very labor-intensive and expensive, plus the necessary data are often not available for such grid resolutions. Accordingly, new spatial surrogate indicators for mobile source emissions(specifically for highway emissions) were developed using Geographic Information Systems(GIS) tools due to the spatially variable nature of mobile source emissions. These newly developed spatial surrogate indicators appear to be more appropriate for the allocation of highway emissions than the population surrogate indicator. It was also revealed that the conventional spatial allocation method underestimates the maximum levels of air pollutant emmissions.mmissions.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.32 no.2
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• pp.69-99
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• 2021

This study aims at exploring what kinds of factors affect university students to choose video contents as information sources of serious leisure activities. Among other, It focuses on the effect of information quality and cognitive authority. This study analyzed 209 sets of data collected by conducting an online survey of university students from across the country. The implications and results of this study are as follows: First, among the sub-components of information quality, timeliness, relevance, and accuracy had a positive effect significantly on the intention of video contents use as an serious leisure information source, and among those of cognitive authority, the characteristics of platforms was the most influential one. Second, the multiple regression analysis was used to figure out that, some sub-components of cognitive authority turned out to have a positive effect significantly on the evaluation of information quality. This study has a significant meaning in that it investigated the intention of video content use with the two factors (information quality and cognitive authority), especially at this time when more and more people are enjoying video contents as an serious leisure information source.

• Journal of the Korean Home Economics Association
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• v.34 no.2
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• pp.99-116
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• 1996

The purpose of this study is, to analyze the relationship between level of clothing involvement and use of information sources. Data was obtained from 130 middle-elderly women living in Chonju, Iri. And it was analyzed by frequency, percent, mean, ANOVA, $\chi$2-testk. The results of this study were as follows : 1) Groups were divided into high and low involvement according to involvement level. 2) The higher was clothing involvement, the lower was age, the higher was education, and the more was income. 3) The higher was clothing involvement, the higher was use df information sources. Groups used mostly information sources by personal media or observation, experience. 4) The high income group used impersonal information source, the low income group used mostly personal information source.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.2
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• pp.437-444
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• 2009

There are many activities that open source software may using at several areas from the government and international organization such as the UN. And Korea enforces the open source software demonstration activities with different meaning link. It is an evaluation field whether or not using the open source software in information projects. But the public information and the education against the open source software are insufficient in the secondary school students who are be latent open source software users. In this paper, We present an examination and analysis of the open source software recognition of the secondary school students in Korea. And We suggest education methods that can use the open source software in the information subject of the revised 7th national education curriculum.

• Journal of Korean Society for Geospatial Information Science
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• v.17 no.4
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• pp.3-11
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• 2009

Open source is recently much more made and distributed by on-line such as internet in various fields. Therefore, end users could rapidly develop applications needed for some purposes using minimal efforts if use open sources. But, open source must be customized for their purposes. In this paper, we developed software for coordinates conversion and compared the software with NGI Pro which is developed by National Geographic Information Institute. Consequently, it is possible for us to easily develop the coordinates conversion module and we know that the use of open source is effective to develop various applications.

• Journal of Korean Society for Geospatial Information Science
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• v.1 no.1 s.1
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• pp.171-180
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• 1993

Concern about nonpoint source pollution associated with urban storm water has led to the development of new tools for better water quality planning. This paper presents an application of a geographic information system (GIS) for urban water quality study. The GIS was used to manage land use data for nonpoint source pollution modeling and to aggregate pollutant loadings within various types of geographic units. An empirical water quality model was used to estimate pollutant loadings based primarily on land use. A land use coverage was created by updating an old coverage through interpretation of recent photography. This land use coverage was also used to record all pollutant loadings for each land use polygon. Storm sewer maps were digitized and interpreted to create a coverage of storm sewer basins and sub-basins. By overlaying pollutant loadings with the sewer sub-basin layer, aggregated pollutant loadings for major sewer outfalls were calculated. Based on the loading information, critical areas of excessive pollutant loadings were located and the effectiveness of Best Management Practices (BMPs) to control pollutant loadings were evaluated.

• International Journal of Human Ecology
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• v.11 no.2
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• pp.51-61
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• 2010

Using data from the 2007 SCF, this study examined the use of information source for investment decisions of elderly consumers. The results indicated that many elderly consumers (about 88%) involved savings /investment decisions. The elderly used 'Experts' (39.48%) as a major information source for their investment decisions, followed by 'Friends' (24.18%). The results of the multinomial logit analysis suggested that the perceived value, the cost for search, knowledge, risk and some of the demographic factors were significantly related to the choice of the information sources for investments by elderly consumers.

• Journal of the Korean Society of Costume
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• v.53 no.6
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• pp.75-86
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• 2003

The purpose of the study is to identify consumers' use of information source, store image, and demographic characteristics by their lifestyle types. and to establish a strategy for marketing and customer satisfaction management in order to response actively to the change of consumer behavior and to survive in this boundless competition. Out of the adult females who visited any discount store from October 3 to October 13. 2001. 300 women who would understand the purpose of the survey and respond it. were given with the questionnaire. Finally, 245 questionnaires were returned and analyzed. The data were processed in factor analysis. group analysis. deviation analysis. Duncan. and cross analysis. with SPSS WIN 10.0. The results are as follows: 1. Life style were categorized into 4 groups: social service pursuing group, fashion change pursuing group. convenience pursuing group, cultural life pursuing group. 2. There were some differences in discount store consumers's use of information source about the cosmetics according to lifestyle types. 3. There were some differences in discount store consumers's store image about the cosmetics according to lifestyle types. 4. There were some differences in discount store consumers's demographic characteristics about the cosmetics according to lifestyle types.

• Journal of the Korea Society of Computer and Information
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• v.21 no.12
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• pp.1-10
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• 2016

In this paper, we attempt to prevent certain cases by tracing a history and making genogram about open source software and its modification using similarity of source code. There are many areas which use open source software actively and widely, and open source software contributes their development. However, there are many unconscious cases like ignoring license or intellectual properties infringe which can lead litigation. To prevent such situation, we analyze source code similarity using program dependence graph which resembles subgraph isomorphism problem, a typical NP-complete problem. To solve subgraph isomorphism problem, we utilized harmony search of metaheuristic algorithm and compared its result with a genetic algorithm. For the future works, we represent open source software as program dependence graph and analyze their similarity.

• Convergence Security Journal
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• v.20 no.2
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• pp.69-76
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• 2020

Blockchain 2.0 supports programmable smart contract for the various distributed application. However, the environment of running smart contract is limited in the blockchain, so the smart contract only get the deterministic information, such as block height, block hash, and so on. Therefore, some applications, which requires random information, such as lottery or batting, should use oracle service that supply the information outside of blockchain. This paper develops a random number generator oracle service. The random number generator oracle service use irregular big data as entropy source. This paper tests the randomness of bits sequence generated from oracle service using NIST SP800-22. This paper also describes the advantages of irregular big data in our model in perspective of cost comparing hardware entropy source.