• Communications of the Korean Institute of Information Scientists and Engineers
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• v.26 no.9
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• pp.23-29
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• 2008

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2001.01a
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• pp.441-447
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• 2001

The problem of query rewriting using views has interested in the context of data integration where source data is described by the views on global relations. When the query and views are of the form of conjunctive queries, the rewriting is a union of conjunctive queries each of which is contained in the original query and consists of only views. Most previous methods for query rewriting using views are 2-step algorithms. In the first step, they identify the views that are useful in rewriting and in the second step they construct all correct rewritings by combining the views that gained in the first step. The larger the number of selected views in the first step, the larger the number of candidate rewritings in the second step. We want to minimize the number of selected views in the first step by defining stringent conditions for a view to be participated in rewritings. In this paper, first we offer a necessary condition for the existence of a rewriting that includes a view. For the common case that predicate repetitions are not allowed in the bodies of views, we show that our algorithm for testing the condition is done in a polynomial-time. Second, we offer an algorithm to construct contained rewritings using the view instances that are computed in the first step. The exponential containment-mapping test in the second step is not needed in our algorithm.

• Korean Journal of Geomatics
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• v.3 no.2
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• pp.99-106
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• 2004

In order to meet the users' demand, who needs faster and more accurate data in geographic information, it is necessary to obtain and process the data more effectively. Now more effective data obtainments about geographic information is possible through the development of integration technology, which is applied to the field of geographic information, as well as through the development of hardware and software engineering. With the fast and precise correction and update, the development of integrate technology can bring the reduction of the time and money. To obtain fast and precise geographic information using Aerial Photogrammetry method, it is necessary to develop Airborne GPS/INS integration system, which makes GCP to the minimum. For this reason, this study has tried to develop a system which could unite and process both GPS and INS data. For this matter, code-processing module for DGPS and OTF initializaion module, which can decide integer ambiguity even in motion, have been developed. And also, continuous kinematic carrier-processing module has been developed to calculate the location at the moment of filming. In addition, this study suggests a possibility of using a module, which can unite GPS and INS, using Kalman filtering, and also shows the INS navigation theory.

• Spatial Information Research
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• v.20 no.6
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• pp.99-107
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• 2012

Recently, various researches have been attempted to connect or integrate BIM handling construction data and GIS handling spatial data. However, it is hard to interoperate by integration between two data models because characteristics and domains of data models between BIM and GIS are very different. In this research, we propose the platform to secure efficient interoperability between BIM and GIS and define the component technologies and functions of the platform proposed in this research by analyzing the existing commercial softwares.

• Journal of Forest and Environmental Science
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• v.29 no.4
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• pp.307-313
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• 2013

Forest Survey consists of road survey, topographic survey, tree mapping survey, stream survey and also ridge survey. Information from forest survey is important and become essential in preparing base map to be used for forest harvesting planning and control. With the current technologies technique of data processing and mapping from traditionally hand drawn method had shifted to a computer system particularly the use of Computer Aided Design (CAD). This gives great advantages to the forest managers and logging operators. However data processing and mapping duration could be further reduced by integrating CAD with other established software such as Microsoft Excel. This time study to show that there is significance difference in term of duration for data processing and efficiency using AutoCAD in combination with Microsoft Excel program as compare to the use of AutoCAD program alone. From the study, it shows that the integration of AutoCAD and Microsoft Excel is able to reduce 70% of duration for data processing and mapping as compared to the use of AutoCAD program alone.

• Korean Journal of Social Welfare
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• v.54
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• pp.149-176
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• 2003

The purpose of this study is to examine the degree of community integration of visually impaired people who have the limitation of mobility in comparison with another disabled and to find factors affecting community integration. The data were obtained through telephone interview with visually impaired people. The final sample was consisted of 1,004 respondents. The data were analyzed using statistical techniques such as crosstabulation, t-test, and hierarchical regression. In this study, the factors affecting community integration was divided into four dimensions : the attribution to disability, physical functioning, psychology and social support system. The major findings of this study were as follows: First, the factors affecting community integration of visually impaired people were age, education, economic status, social support, information support and participation of rehabilitation service. Second, the factors affecting community integration of the low vision and the blind are the limitation of daily activities and social support. But the factors affecting community integration of the blind are participation of education for braille and that of the low vision are information support and participation of rehabilitation service. Finally, the person losing eyesight since school age were the more limitation of daily activities than the person losing eyesight in babyhood. The factors affect community integration of the former are social support, information support, participation of education for braille, and rehabilitation service. The current findings suggest that intervention and policy aimed at improving social support system and formal services such as education, rehabilitation services should be considered by rehabilitation professionals and policy makers.

• Korean Parent-Child Health Journal
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• v.8 no.2
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• pp.168-181
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• 2005

The purpose of this study was to examine the Enneagram personality types of nursing students. Data were collected through self-reported questionnaires from 225 nursing students living in D city from 14, November to 17, November in 2005. The data collected were analyzed using frequency, percent with SPSS. The findings of this study were as follows : In the nine Enneagram personality types, type 9 was highly measured and the next order was type 1, 4, 7, 2, 8, 6, 5, 3. In the triadic center of Enneagram personality types, gut type was highly measured. The next order was heart type and head type. In the wing, 9W1 was highly measured and the next order was 1W9 and 'both wing is equal'. In the disruption and integration, the disruption rather than integration was highly measured. In the disruption and integration according to personality types, the integration rather than disruption was highly measured in type 2, 6, 1. In the disruption and integration according to triadic center, the disruption was highly measured in gut type and the integration was highly measured in heart type and head type. The most development level was level 5. The next order was level 6, 4, 7, 3. There was no one present in level 1, 2, 8, 9. The results of this study suggest that there is need of individual guide considering Enneagram personality types in nursing students. We need to develop various group counseling program related to Enneagram personality types.

• Journal of Korean Society for Quality Management
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• v.27 no.4
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• pp.20-41
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• 1999

This study addresses the development of a quality measurement of information systems integration(SI) service. Several dimensions which affect on quality of systems integration service have been identified and tested. Also, a measurement tool(questionnaire) of the factors has been developed. To achieve above purpose, extensive literature review and in-depth interview with several SI managers and customers were used. We suggested the analysis framework including performance variables such as quality, customer satisfaction, intention of renewal contract, and contribution to better customer's information system and the quality factors as well. To verify the research framework, collected data from the survey was analyzed statistically. The data from 73 respondents was used for analysis. Consequently, we identified eight factors and developed a 41-item instrument with Likert 5 points to measure the quality of SI service. It was proved that the 41-item instrument suggested in this study was very useful to measure the performance of SI service such as quality and customer satisfaction. Also it was shown that the instrument measured intention of renewal contract and contribution of customer's information system well.

• Journal of the Korea Society of Computer and Information
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• v.21 no.10
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• pp.107-114
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• 2016

In this paper, we propose the building method for the unified IoT service platform between the variety of legacy systems with the heterogeneous structures and the operating environments. To accommodate the structural diversity of legacy systems, we develop a virtual integrated structure and interface abstracting method. By this, the new platform can use the data sources of the legacy systems as if the data source is in the new platform. In a manner without modification of the legacy systems with performing minimum tasks, we proposes a model that can be integrated without affecting the availabilities of the legacy systems.

• International journal of advanced smart convergence
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• v.5 no.1
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• pp.16-22
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• 2016

The database integration is being emphasized to one way of the companies collaboration. To database integration, companies are use like one database what their own, it can be provided more efficient service to customer. However, there exist some difficulty to database integration. that is the database security and database heterogeneity problems. In this paper, we proposed the MapReduce based p2p DBaaS hub system to solve database heterogeneity problem. The proposed system provides an environment for companies in the P2P cloud to integrate a database of each other. The proposed system uses DBaaS Hub for a collection of data in the P2P cloud, and use MapReduce for integrating the collected data.