• Journal of Korea Water Resources Association
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• v.55 no.11
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• pp.913-922
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• 2022

The purpose of this research is to propose the measurement of improving DEM by using the water surface range of SAR image analysis for river corridors and to suggest the construction of satellite-based 3D river spatial information of inaccessible regions such as North Korea. For this research, it has been progressed from the accessible area, watershed of Namgang river, the branch of Nakdonggang river. The satellite image was collected from SAR satellite image data for a year in 2021 which was provided by ESA from Sentinel-1A/B data and extracted from the seasonal water surface area. Ground gauge water level was collected from hourly intervals data by WAMIS. The DEM was improved by analysis of the river altitude of water surface area change by the combination of the ground water level of minimum to maximum water surface area data extracted from SAR image analysis. After the improvement of DEM, the altitude of the river varied that it is defined to comprise more natural form of river DEM than the existing DEM. The correction validation of improvement DEM was necessary in field survey elevation data; however, the correction validation was not progressed due to the absence of the data. Although, the purpose of this research is to provide the improvement of DEM by using the analyzed water surface by existing DEM data and SAR image analysis. After the progression of additional correction validation research, we would plan to examine the application in other places and to progress the additional methodological research to apply in inaccessible and unmeasured area including the North Korea.

• Journal of Korea Spatial Information System Society
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• v.5 no.1 s.9
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• pp.49-63
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• 2003

Recently, two international standard organizations, ISO and OGC, have done the work of standardization for GIS. Current standardization work for providing interoperability among GIS DB focuses on the design of open interfaces. But, this work has not considered procedures and methods for designing GIS DB. Eventually, GIS DB has its own model. When we share the data by open interface among heterogeneous GIS DB, differences between models result in the loss of information. Our aim in this paper is to revise the design guidelines for geographic information databases in order to make consistent spatial data models, logical structures, and semantic structure of populated geographical databases. In details, we propose standard guidelines which convert ISO abstract schema into relation model, object-relation model, object-centered model, and geometry-centered model. Furthermore, we provide sample models for applying these guidelines in commercial GIS S/Ws. Building GIS DB based on design guidelines proposed in the paper has the following advantages: the interoperability among databases, the standardization of schema definitions, and the catalogue of GIS databases through.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.1305-1312
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• 2006

This study is about the development of measurement system using ubiquitous wireless communication for river flow monitoring. The system can acquire water depth, quality (temperature, pH, conductivity, turbidity etc.) while a GPS module for getting the location data of measurement points. Also this system is able to acquire the field data via RF connection and can be controlled same time. The acquired data is transmitted to a gateway system from the remote buoy using Zigbee wireless connection. And the gateway system is able to monitor the data through GIS monitoring tool. Finally the data are transmitted to a server computer using CDMA wireless connection by gateway system. The D/B of server computer are constructed automatically and monitored the project web site. The resulting system can be used for scour monitoring, environment monitoring and the other monitoring purposes such as a river flow monitoring system.

• Journal of the Korean Institute of Gas
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• v.4 no.2 s.10
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• pp.52-57
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• 2000

This paper suggests the evaluation sheet to ensure the objective and detailed information based on a classification table of PIF (Performance Influencing Factor). And this paper shows the results of HEP(Human Error Probability), using a quantitative method with the evaluated data as a result of estimating the likelihood of . human errors in the gas industry facility together with the evaluation sheet. Finally, these results are programmed to be operated in personal computer so that field workers an apply it in easy and convenient manner. The results of this study offer two key benefits; sharing reliable information on human errors with the Data Base and establishing a strategy to reduce human errors as well as to improve working proficiency.

• The Korean Journal of Food And Nutrition
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• v.9 no.4
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• pp.404-408
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• 1996

One of the major objectives of the food industry is the enrichment of the functional properties and nutritional value of soybean protein. To attain this goal, an expression system of cDNA encoding native and protein-engineered soybean proteins in a microorganism must be developed and the function then ability of self-assembly and the functionalities of the expressed proteins should be evaluated before the modified genes are transfered to soybean plants. The pro-$\beta$-conglycinin synthesized in E. coli BL21(DE3) comprised approximately 20% of the total bacterial proteins and the expressed protein are formed soluble and trimer such as native protein in E. coli cells. The highly expressed protein was purified to homogeneity by salt precipitation with 20~40$ Ammonium sulfate ion-exchange chromatography with Q-Sepharose and hydrophobic column chromatography with Butyltoyopearl. Therefore, we concluded that the high-level expression system of $\beta$-conglycinin cDNA was established and a relatively simple and rapid method for purifying pro-$\beta$-conglicinin was also developed.

• Journal of the Korean Society for information Management
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• v.24 no.4
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• pp.345-374
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• 2007

Community colleges are key constituents of higher education in Korea, along with four-year universities. The number of community colleges in Korea also holds significance. However, the main focus of the Master Plan for Library Development decisively lies in university libraries, with little consideration to the poor condition of community college libraries. This study aims to identify problems of community college libraries by conducting a document research on their current standing and, based on that, to present six policy proposals for government support. They are a) to develop library collections based on the school specialty, b) to build theme-oriented libraries, c) to facilitate cooperation between community college libraries, d) to reinforce capacities for library service, e) to improve legal status of community college libraries and develop an evaluation index, f) and to estimate demand and evaluate service quality.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.38 no.4
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• pp.265-275
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• 2005

A prerequisite for deriving the abundance estimates from acoustic surveys for commercially important fish species is the identification of target strength measurements for selected fish species. In relation to these needs, the goal of this study was to construct a data bank for converting the acoustic measurements of target strength to biological estimates of fish length and to simultaneously obtain the target strength-fish length relationship. Laboratory measurements of target strength on 15 commercially important fish species were carried out at five frequencies of 50, 70, 75, 120 and 200 kHz by single and split beam methods under the controlled conditions of the fresh and the sea water tanks with the 389 samples of dead and live fishes. The target strength pattern on individual fish of each species was measured as a function of tilt angle, ranging from $-45^{\circ}$ (head down aspect) to $+45^{\circ}$ (head up aspect) in $0.2^{\circ}$ intervals, and the averaged target strength was estimated by assuming the tilt angle distribution as N $(-5.0^{\circ},\;15.0^{\circ})$. The TS to fish length relationship for each species was independently derived by a least-squares fitting procedure. Also, a linear regression analysis for all species was performed to reduce the data to a set of empirical equations showing the variation of target strength to a fish length, wavelength and fish species. For four of the frequencies (50, 75, 120 and 200 kHz), an empirical model for fish target strength (TS, dB) averaged over the dorsal sapect of 602 fishes of 10 species and which spans the fish length (L, m) to wavelength (\Lambda,\;m)$ ratio between 5 and 73 was derived: $TS=19.44\;Log(L)+0.56\;Log(\Lambda)-30.9,\;(r^2=0.53)$.

• Journal of the Korean GEO-environmental Society
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• v.18 no.1
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• pp.13-21
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• 2017

In this study, the behavior characteristics and triggering rainfall of debris flow were investigated on the basis of DB constructed by performing field investigation and collecting the rainfall data at the sites where debris flow occurred around the west of Gangwon and adjacent areas during the last 10 years. For hill slope and channelized type of debris flow, its behavior characteristic was analyzed through runout channel of debris flow divided into zone of initiation, transportation and deposition and its magnitude was estimated by considering erosion at zones of initiation and transportation. Some considerations related to establishment of landslide forecasting criterion were raised by comparing the analyzed results of analysis of rainfall at the time of debris-flow occurrence with the previous researches about the triggering rainfall of debris flow. In addition, an ID curve of inducing debris flow adequate to the investigated site was proposed and compared with results of previous study.

• Journal of The Korean Association of Information Education
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• v.21 no.2
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• pp.171-181
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• 2017

Each City & Provincial office of education has provided educational informatization training, which invites its partner country's teachers as part of 'e-Learning Globalization Project.' The purposes of this training program are, a) improving nation brand power by maintaining e-learning national competitiveness and strengthening influence, b) solving digital divide by sharing Korean best practices, c) establishing partnership through exchanges and cooperation, d) capacity building which support partner country's leading teachers can play key roles to spread educational informatization in their own country. It is necessary to reflect outcomes of training program until now and to find sustainable development plan, at 10th anniversary of Education ICT training program now. In order to fulfil purposes, qualitative research was conducted to analyze current status based on context, input, process, and product phases, and to find sustainable development alternative. In-depth interview(IDI) was conducted among supervisor, officials, and teachers from partner countries. Also, the result of IDI was analyzed by themes.

• Proceedings of KOSOMES biannual meeting
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• 2007.11a
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• pp.145-148
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• 2007

In this paper a development if data acquisition system for machinery monitoring and its condition analysis is discussed A suitable data acquisition system should be adopted to get desirable monitoring results for ship's machinery. 1he compactness and moderate cost are also considered to compose the data acquisition system 1he basic components if data acquisition system for monitoring are introduced and automatic data saving function with variable time interval and remote monitoring system are also proposed An experiment to get vibration data for rotating machinery is executed to verify the effectiveness if the data acquisition system.