• 한국환경복원기술학회지
• /
• 제9권6호
• /
• pp.13-22
• /
• 2006

The purpose of this study is to propose rational methods in order to maintain vegetation condition and soil environment based on the analysis of tree growth in relation to the soil environment, which is one of the most significant environmental factors on vegetation condition in urban parks and open spaces. The result of the study can be described as below;The soil on every study site had strong acidity. In particular, study sites around industrial district and central business district showed extreme soil acidity. Therefore, soil management system is needed in urban parks and green spaces around those areas. Among Cambium Electric Resistance classified by locations of urban parks and open spaces, one in the costal area was the lowest. The Cambium Electric Resistance in the industrial area was the highest. Therefore, soil condition and locational environment in the industrial area are highly related to the Cambium Electric Resistance. Among the factors, which affect Cambium Electric Resistance in different locations, inorganic content was found to be the main factor in all of the study sites. Inorganic content was an important factor to the Cambium Electric Resistance in study sites located in industrial and central business districts. In the study sites located in costal area, Soil acidity was found to be other important factors that affect Cambium Electric Resistance. To improve the soil acidity, soil buffering ability should be improved from activating microorganisms in the soil by using lime and organic material, Since it takes a long time to make a change in the soil structure, well planed maintenance system is required by mid-term or long-term plans.

• 인터넷정보학회논문지
• /
• 제20권2호
• /
• pp.69-76
• /
• 2019

Recent Enterprise System has component driven real-time distributed architecture (RDA) and this kind of architecture should performed with satisfying strict constraints on life cycle of object and response time such as synchronization, transaction and so on. Microsoft's .NET platform supports RDA and is able to implement services including before mentioned time restriction and security service by only specifying attribute code and maximizing advantages of OMG's Model Driven Architecture (MDA). In this study, a method to automatically generate an extended model of essential elements in an enterprise-system-based RDA as well as the platform specific model (PSM) for Microsoft's .NET platform are proposed. To realize these ideas, the functionalities that should be considered in enterprise system development are specified and defined in a meta-model and an extended UML profile. In addition, after defining the UML profile for .NET specification, these are developed and applied as plug-ins of the open source MDA tool, and extended models are automatically generated using this tool. Accordingly, by using the proposed specification technology, the profile and tools can easily and quickly generate a reusable extended model even without detailed coding-level information about the functionalities considered in the .NET platform and RDA.

• 한국전자거래학회:학술대회논문집
• /
• 한국전자거래학회 2001년도 International Conference CALS/EC KOREA
• /
• pp.503-510
• /
• 2001

Q+-reader, an E-Book reader system for XML based contents is introduced. The system is developed for the embedded platform, called Q+, which targets for the digital home electronics systems. The system supports XML contents and CSS based styling as described in Open e-Book standard. The system renders the e-book contents for users, so the contents are secured for a proper use. This will found an essential part of business infra for electronic books with copyright protection. The system was developed in Java language to be used in various platforms, and has an open architecture to be reusable for other standards as well.

• 인터넷정보학회논문지
• /
• 제2권4호
• /
• pp.83-90
• /
• 2001

XML 기반의 전자책 리더 시스템인 Q＋-리더의 개발을 소개한다. 이 시스템은 정보가전 용 내장형 플랫폼 Q+를 목표로 개발되었다. 본 리더 시스템은 OEB 표준에서 규정한 XML 기반의 컨텐트 형식과 CSS에 의한 스타일을 지원한다. 본 시스템은 전자책 컨텐츠를 사용자에게 랜더링해 주는 역할을 하는데, 이러한 랜더링 기능을 내재함으로서 전자책 리더 시스템은 컨텐츠의 사용에 대한 제어가 가능하게 된다. 본 시스템은 자바 언어로 개발되어 여타 플랫폼에서도 사용 가능할 뿐 아니라 개방형 구조로 설계되어 OEB 이외의 다른 표준에 대해서도 쉽게 확장 가능할 것으로 기대된다.

• 한국정보과학회:학술대회논문집
• /
• 한국정보과학회 2006년도 한국컴퓨터종합학술대회 논문집 Vol.33 No.1 (A)
• /
• pp.226-228
• /
• 2006

In this paper we describe a simulation and development framework for designing mobile 3D graphics architectures. We are developing a simple and flexible simulation and verification environment (SVE) that uses gITrace's ability to intercept and redirect an OpenGL/ES streams. In combination wlth gITrace to trace OpenGL/ES commands, the SVE simulates the behavior of mobile 3D graphics pipeline during playback of traces, and then produces the second geometry trace that can be used as a test vector for the Verilog/HDL RT-level model. By comparing the frame-by-frame results, we can conduct architectural verification. To demonstrate the functionality of the SVE, we show the implementation of the verified mobile 3D architecture on a FPGA board. For this, we also present an application development environment (ADE) includes a mobile graphics API and a device driver interface (DDI). The proposed two software environments, the SVE and the ADE could be used fer developing and testing mobile applications, architectural study and speculative hardware designs.

• 한국CDE학회논문집
• /
• 제19권3호
• /
• pp.224-235
• /
• 2014

Recently, Productivity of the construction industry has been decreasing than other industries. Because of this, BIM is being spread in the construction industry. However, quality criteria for BIM data is insufficient. Regulation information is an important factor for initial architectural design evaluations. However, building code and related regulation are numerous. National building code structure in Korea is much more complex than other countries. The purpose of this study is to suggest the typology method of building code and apply to real regulations. To achieve this purpose, the authors have extracted required information to from original regulation for code checking and suggested mapping methods between extracted information and information of IFC scheme. In addition, the authors have represented EXPRESS-G diagram for extracting information from IFC scheme and suggested code checking method through stair case. Output of this study can be used as a base line data for automated code checking system based on open BIM. Automated code checking system will be utilized in architectural design evaluations and supported to increase design quality. It can be used to mount in SEUMTER that is the construction administration system of Ministry of Land, Infrastructure and Transport (MOLIT).

• 정보처리학회논문지D
• /
• 제11D권6호
• /
• pp.1239-1246
• /
• 2004

인터넷 기반의 광역화 물류환경인 e-Logistics에서 요구하는 가시성을 충족하기 위해서는 지역별 전자지도 및 차량 위치정보에 대한 공유와 통합이 필수적이다. 기존의 대부분의 차량관제시스템들은 독자적인 체계를 중심으로 구축되었기 때문에 정보의 공유와 통합을 위해서는 막대한 비용이 필요하다. 이를 효과적으로 해결하기 위해서 본 논문에서는 XML 엔코딩 표준인 GML을 이용하여 이동체 위치정보와 지도정보의 프리젠테이션을 위한 컴포넌트 기반의 개방형 시스템을 설계하고 구현하였다. 아울러 e-Logistics 환경의 배송 시나리오를 통한 실험을 통해 확장성 및 상호 운용성에 대한 우수성을 확인하였다.

• 한국인터넷방송통신학회논문지
• /
• 제19권3호
• /
• pp.73-82
• /
• 2019

스마트팩토리를 구축하기 위해서는 CPPS(Cyber Physical Production System)의 구축은 필수적으로 동반되어야 하는 중요한 시스템이다. CPPS를 통해서 물리적 공장을 디지털 기반의 사이버 세상으로 옮겨오고 이를 지능적, 자율적으로 모니터링하고 제어하는 것이 스마트팩토리의 실체이다. 하지만 기존에 제시된 CPPS의 아키텍처들은 추상적인 모델링 형태의 아키텍처만 제시하고 있으며, 스마트팩토리에서 데이터를 수 집 교환을 위한 국제 표준인 OPC UA Framework(Open Platform Communication Unified Architecture)을 CPPS의 기본적인 체계로 적용한 연구는 부족하였다. 이에 아키텍처 구성 실제 공장에 적용 가능한 CPPS 아키텍처로 분산되어진 필드 데이터를 수집하여 중앙에 집중화 된 서버에서 집중된 데이터 처리가 되어야만 클라우드와 IoT를 모두 포함할 수 있는 CPPS를 구현 가능하다. 본 연구에서는 중앙 처리 OPC UA Framework을 준수한 OPC UA를 기술 체계를 기반으로 중앙의 OPC UA Server를 통해 CPPS 아키텍처를 구현하고 OPC UA 모델링 처리를 통해 CPPS 논리 프로세스와 데이터 처리 프로세스가 자동으로 생성되는 방법을 포함한 CPPS 아키텍처를 제안하고 모델 공장을 실제로 구현하여 그 성능과 가용성에 대해서 연구하였다.

• 한국정밀공학회지
• /
• 제21권8호
• /
• pp.143-151
• /
• 2004

This paper deals with the precision NURBS interpolator for wire-EDM. Previous research about OAC (Open Architecture Controller) is mostly aimed at NC cutting machines such as milling or lathes, and hence these results are inadequate to apply to wire-EDM. In contradiction to NC machines, wire-EDM operates relatively slow feed rates and based on a feedback control loop to the machining process. The 2-stage interpolation method which reflects wire-EDM specific characteristics was proposed. The constant interpolation error could be acquired through 1 st stage interpolation. Feed rate regulation was performed through 2nd stage interpolation. The suggested algorithm was implemented to test-bed PC-NC system. Computer simulations and the experimental machining were conducted.

• International Journal of Ocean System Engineering
• /
• 제4권1호
• /
• pp.49-56
• /
• 2014

A three-dimensional multidirectional nonlinear numerical wave tank (NWT) based on the Navier-Stokes equations and the Finite Volume Method (FVM) is developed by using the two-phase hydrodynamic flow solver naoe-FOAM-SJTU based on the open source toolbox OpenFOAM. The free surface is capturing with the Volume Of Fluids (VOF). The directional wave including Stokes wave, solitary wave and nonlinear wave are simulated and verified. The multi-directional waves are also simulated with particular wave spectral such as JONSWAP and wave directional spreading function. The obtained numerical results show the capability of the solver to generate different type of multidirectional nonlinear waves accurately. Meanwhile, it implies that the presented NWT can easily extend to model the wave-structures interactions, which will be great help to the offshore structures design.