• 한국컴퓨터정보학회논문지
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• 제22권11호
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• pp.39-47
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• 2017

In this paper, we propose a message transmission processing structure for efficient use of radio resources. Existing tactical data links have more data and accumulate more data than the amount of tactical data planned according to the situation. This may result in delays in operations and additional problems. To prevent this, priority is assigned to the message and transmission is performed according to the priority on a single basis. And we design a processing structure that can update duplicate messages and delete old messages in order to prevent waste of radio resources. Experiments are conducted to verify that these structures can be implemented and applied to data links.

• Journal of information and communication convergence engineering
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• 제9권4호
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• pp.457-460
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• 2011

For the mobile meteorological services, sensed data should be gathered at a server from various clients like as Ubiquitous Sensor Network, mobile phone or public traffic vehicle by wireless network. The gathered data at server have huge volume and increase continuously. Therefore, a special query method and data structure should be considered. This paper studies on all possible query type on the data and processing steps for the mobile meteorological services. Some query spaces will be discussed. After that, this paper proposes effective data structure for the sensed data to support the query types.

• 한국정밀공학회지
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• 제5권2호
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• pp.56-61
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• 1988

For the use of computer to store, modify and retieve technical data, GT coding system has been considered as one of the effective methods. Effective data management is important for Computer Intergrated Manufacturing. Based on actual data obtained from a hand-tool maker, a die/tool coding system is developed as an example and its data base is designed susing a linked list structure. It is suggested that industries use this method to make their own data base.

• Ocean and Polar Research
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• 제33권spc3호
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• pp.397-407
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• 2011

To understand the vertical structure of ocean currents from raw data observed by lowered-ADCP (LADCP), these data require post-processing. Data were processed using Krahman's version 10.8 processing software based on Matlab. It is estimated the influence of auxiliary data affecting the processed current structure. The bottom-tracked velocities and the GPS information significantly contribute the offset on reference velocities in the bottom layer and barotropic ones in the middle layer, respectively. Good quality data can be obtained when LADCP is least tilted in pitch and roll during observation. In situ application of LADCP to the (northward) volume transports of Kuroshio in the East China Sea proved to be 24.8. Sv (= $1{\times}10^6m^3s^{-1}$) in October 2007, and 28.2 Sv in June 2008, respectively. The volume transport is relatively large over the continental slope when compared to the shelf or the deep sea.

• 한국CDE학회논문집
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• 제7권3호
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• pp.157-169
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• 2002

In the initial stages of ship design, designers represent geometry, arrangement, and dimension of hull structures with 2D geometric primitives such as points, lines, arcs, and drawing symbols. However, these design information(‘2D geometric primitives’) defined in the drawing sheet require more intelligent translation processes by the designers in the next design stages. Thus, the loss of design semantics could be occurred and following design processes could be delayed. In the initial design stages, it is not easy to adopt commercial 3D CAD systems, which have been developed f3r being used in detail and production design stages, because the 3D CAD systems require detailed input for geometry definition. In this study, a semantic product model data structure was proposed, and an initial structural CAD system was developed based on the proposed data structure. Contents(‘product model data and design knowledges’) of the proposed data structure are filled with minimal input of the designers, and then 3D solid model and production material information can be automatically generated as occasion demands. Finally, the applicability of the proposed semantic product model data structure and the developed initial structural CAD system was verified through application to deadweight 300,000ton VLCC(Very Large Crude oil Carrier) product modeling procedure.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.353-356
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• 2007

With advances in sensor technology, current researches on the pertinent techniques are actively directed toward the way which enables the USN computing service. For many applications using sensor networks, the incoming data are by nature characterized as high-speed, continuous, real-time and infinite. Due to such uniqueness of sensor data characteristics, for some instances a finite-sized buffer may not accommodate the entire incoming data, which leads to inevitable loss of data, and requirement for fast processing makes it impossible to conduct a thorough investigation of data. In addition to the potential problem of loss of data, incoming data in its raw form may exhibit high degree of complexity which evades simple query or alerting services for capturing and extracting useful information. Furthermore, as traditional mining techniques are developed to handle fixed, static historical data, they are not useful and directly applicable for analyzing the sensor data. In this paper, (1) describe how three mining techniques (sensor data outlier analysis, sensor pattern analysis, and sensor data prediction analysis) are appropriate for the USN middleware structure, with their application to the stream data in ocean environment. (2) Another proposal is a middleware structure based on USN environment adaptive to above mining techniques. This middleware structure includes sensor nodes, sensor network common interface, sensor data processor, sensor query processor, database, sensor data mining engine, user interface and so on.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2008년도 정기 학술대회
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• pp.100-103
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• 2008

Recently Development of construction system that subjective operators share and control information efficiently based on the three-dimensional space and design information throughout life cycle of construction project is progressing dynamically. In case of civil structures which are infrastructure, Demand for structure of complex system which has multi-functions such as super and smart bridges and express rails is increasing and system development which computerizes and integrates process of structure design is in need. For that, research about link way between three dimensional modeling data and structure analysis programs should be preceded. In this research, therefore, research about interface design between three dimensional virtual modeling data to automate efficient civil-structure-design and nonlinear finite element analysis program which is made up of reinforced concrete material model that express material's character clearly.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 추계학술대회
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• pp.641-642
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• 2018

현재 실내 측위를 위한 기술로 전파 지문 기반의 측위 기술의 성능은 데이터 비교 알고리즘의 선택에 따라 큰 영향을 받는다. 이때 학습 구조에 필요한 데이터 확장 기법에 의해 실내 측위의 정확도가 크게 개선될 수 있다. 본 논문에서는 Wi-Fi 전파 지문을 기반으로 하는 학습 구조를 구성하기 위해 학습 데이터의 구분 및 확장 기술을 통해 실제 측위에 적용할 수 있는 학습 구조의 중요성을 논의한다.

• 대한조선학회논문집
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• 제40권3호
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• pp.37-44
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• 2003

In rough seas, bow-flare regions of the sea-going ships are subject to high impact pressures due to the bow-flare slamming and panting. And many ships suffer structural damages in that region, even though they were built under the bow structure strengthening rules of the ship classes. So, a new design method for bow-flare structure is highly required. In this paper, bow-flare damage analysis is performed for 17 ships (total number of damage/non-damage data is 782). Based on this analysis, a new design standard and method for bow-flare structure (shell plate, frame and web frame) is proposed. 80.4% of the present damage/non-damage data were well-explained by this new design standard.

• 대한공간정보학회지
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• 제18권2호
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• pp.113-118
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• 2010

지형정보에 대한 3차원 복원 및 지리정보에 관한 연구와 적용은 최근 국가적인 정책을 통하여 R&D 사업 및 시범 사업 등으로 여러 분야에 걸쳐 진행되고 있다. LiDAR 시스템은 3차원 공간데이터를 손쉽고 조밀하게 취득할 수 있는 이점이 있어 다방면으로 연구와 활용이 이루어지고 있으나 3차원으로 구성된 점 자료의 특성으로 볼 때 화면을 통한 2차원의 형태로 나타내기 위해서는 많은 연산 처리를 필요로 하게 되어 높은 사양의 처리 프로세서가 필요하다. 이에 비해 2차원 격자구조는 간단한 구조와 처리속도로 인하여 벡터구조에 비하여 저가의 장비에서도 가능한 장점이 있다. 따라서 본 연구에서는 3차원의 형식으로 저장된 LiDAR 자료를 도심지역의 3차원 지형 표현이나 건물 표현등에 활용하고자 할 경우 발생할 수 있는 과대한 저장공간의 요구에 따른 문제를 해소하기 위하여 3차원 지형 표현 자료로 제공하기 유용한 2차원 격자 형태의 자료로 재구성하여 그 저장공간을 축소시키면서 트리구조를 응용하여 세밀한 표현도 가능하도록 하는 저장하는 기법을 제시하고자 한다.