• Korean Journal of Remote Sensing
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• v.38 no.6_3
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• pp.1761-1775
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• 2022

Due to unpredictable climate change, the frequency of occurrence of water-related disasters and the scale of damage are also continuously increasing. In terms of disaster management, it is essential to identify the damaged area in a wide area and monitor for mid-term and long-term forecasting. In the field of water disasters, research on remote sensing technology using Synthetic Aperture Radar (SAR) satellite images for wide-area monitoring is being actively conducted. Time-series analysis for monitoring requires a complex preprocessing process that collects a large amount of images and considers the noisy radar characteristics, and for this, a considerable amount of time is required. With the recent development of cloud computing technology, many platforms capable of performing spatiotemporal analysis using satellite big data have been proposed. Google Earth Engine (GEE)is a representative platform that provides about 600 satellite data for free and enables semi real time space time analysis based on the analysis preparation data of satellite images. Therefore, in this study, immediate water disaster damage detection and mid to long term time series observation studies were conducted using GEE. Through the Otsu technique, which is mainly used for change detection, changes in river width and flood area due to river flooding were confirmed, centered on the torrential rains that occurred in 2020. In addition, in terms of disaster management, the change trend of the time series waterbody from 2018 to 2022 was confirmed. The short processing time through javascript based coding, and the strength of spatiotemporal analysis and result expression, are expected to enable use in the field of water disasters. In addition, it is expected that the field of application will be expanded through connection with various satellite bigdata in the future.

• Animal cells and systems
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• v.3 no.3
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• pp.343-346
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• 1999

Two unrecorded taxa of Polygonatum (Liliaceae), P. odoratum var, odoratum from IsI. Pungdo, Ansan-shi, Kyonggi Province and P. acuminatifolium from Mishiryong, Kangwon Province were reported. The morphological difference between P. odoratum var. odoratum and P. odoratum var. pluriflorum includes distribution patterns of papillae on the filament surface.

• Journal of the Korean Data and Information Science Society
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• v.19 no.2
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• pp.413-420
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• 2008

This paper suggests a marginal logit mixed-effects for analyzing repeated binary response data. Since binary repeated measures are obtained over time from each subject, observations will have a certain covariance structure among them. As a plausible covariance structure, 1st order auto-regressive correlation structure is assumed for analyzing data. Generalized estimating equations(GEE) method is used for estimating fixed effects in the model.

• Proceedings of the Korean Magnestics Society Conference
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• 2007.05a
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• pp.238.2-238.2
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• 2007

• Proceedings of the KIEE Conference
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• 2008.04a
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• pp.203-204
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• 2008

본 논문은 결함방지 알고리즘이 적용된 트랜시버 모듈을 사용해서 홈네트워크 내에서 발생한 결함, 침입 등에 대응 할 수 있는 방법을 설명한다. 시스템 구성도와 결함방지 알고리즘에 대해서 설명하고 알고리즘을 수행하는데 있어서 필요한 데이터베이스의 구조와 역할을 제시하였다. 마지막으로 알고리즘을 적용한 테스트용 홈기기가 올바르게 동자하는 것으로 시스템 제어 결과를 확인 하였다.

• Bulletin of the Korean Chemical Society
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• v.34 no.7
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• pp.2199-2202
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• 2013

• Proceedings of the IEEK Conference
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• 2004.06b
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• pp.481-484
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• 2004

To make production and equipment investment plans in semiconductor Line, implementation of many variables is needed. But these factors could bring many changes and the result is hard to predict. Because prediction is hard, it is hard to make a standard. So this project established Semiconductor production plans using LP Algorithm to satisfy all the conditions from the factors and came up with thesis on reasonable and standardized process.

• Journal of Korean Society for Quality Management
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• v.23 no.1
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• pp.95-105
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• 1995

The error structure of nonlinearized technological growth models, such as, the Pearl curve, the Gompertz curve and the Wei bull growth curve, has zero mean and a constant variance over time. Transformed models, however, like the linearized Fisher-Pry model. the linearized Gompertz growth curve, and the linearized Weibull growth curve have increasing variance from t = 0 to the inflection point.

• Proceedings of the Society of Korea Industrial and System Engineering Conference
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• 2002.05a
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• pp.79-84
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• 2002

The study has the three purposes; 1) to investigate the relationship between job stressors and perceived job stress, 2) to understand the effect of perceived Job stress and job attitude (job satisfaction, job involvement), and 3) to examine the role of moderators such as social support and personality in the relationship between job stressors and perceived job stress in information system organizations.

• IE interfaces
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• v.13 no.1
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• pp.10-16
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• 2000

The main purpose of this paper is to explore the role of meta-knowledge for knowledge creation and knowledge transformation in cooperative problem solving processes. For this I will discuss what the primary functions of meta-knowledge are from the knowledge representation perspective. The proposed theoretical model is useful to develop a new form of knowledge management support systems beyond the first generation of knowledge-based systems.