• 한국정보시스템학회지:정보시스템연구
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• 제9권1호
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• pp.61-86
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• 2000

CALS(Commerce At Light Speed) which originated in the early 1980's in the military sector is now an integral component in our global strategy to further heighten competitiveness. Through integration and streamlining of production, distribution, technical information and management, CALS will certainly lead the world out of these economically challenging times and into new global prosperity. However, not much effort have been focused on the development and diffusion issues of component technologies such as ERP/SCM(Enterprise Resourses Planning/supply Chain Management), PDM(Product Data Management), and BPR(Business Process Reengineering) related with the CALS in electronic industry. Therefore, the purpose of this study is to analyze the advancing status and to present suggestions for the development of the CALS in electronic industry. In order to achieve the purpose, the case study has been conducted using the questionaries on the end-users and the interviews on the managers in the CALS area. The case study cover 57 users of the CALS for the three outstanding electronics(L, S, and D Electronics) in Korea. The questionaries include five success measures and eleven diffusion factors for the component technologies such as ERP/SCM, PDM, and BPR. In summary, the CALS will serve as the bases for exciting corporated innovations and the common business framework which facilitates the realization of Virtual Enterprise and Electronic Commerce in the 21st century.

• 디지털융복합연구
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• 제10권9호
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• pp.111-122
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• 2012

본 연구는 인터넷 웹사이트에서 소비자운동을 설명하는데 있어서 인지적인 요인과 감정적 요인의 효과를 살펴본 연구이다. 특히, 인지적 요인을 설명하는 그루닉의 상황적 이론과 감정적 요인을 설명하는 분노활성화 이론을 결합하여 통합모델을 제시하였다. 이 모델을 검증하기 위해서 소비자에 웹사이트에서 이슈화된 제품과 관련 소비자들의 커뮤니케이션 활동을 살펴보았다. 웹사이트에서 멤버들의 커뮤니케이션 활동을 분석하기 위해 가입자를 대상으로 온라인 설문을 실시하였다. 분석결과, 상황적 이론 및 분노는 온라인에서 소비자들의 능동적인 커뮤니케이션 활동을 유의미하게 설명하였다. 더불어 상황적 이론의 요인과 분노를 결합한 모델은 더욱 설명력이 높았고 그 중에서도 분노는 강력한 요인으로 판명되었다.

• Journal of Multimedia Information System
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• 제4권3호
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• pp.123-144
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• 2017

Personalized media includes user-targeted and user-generated content (UGC) exchanged through social media and interactive applications. The increased consumption of UGC presents challenges and opportunities to multimedia information systems. We work towards modeling a deep structure for content networks. To gain insights, a hybrid practice with Media Framework (MF) is presented for network creation of personalized media, which leverages the authoring methodology with user-generated semantics. The system's vertical integration allows users to audition their personalized media networks in the context of a global system network. A navigation scheme with dynamic GUI shifts the interaction paradigm for content query and sharing. MF adopts a multimodal architecture anticipating emerging use cases and genres. To model diversification of platforms, information processing is robust across multiple technology configurations. Physical and virtual networks are integrated with distributed services and transactions, IoT, and semantic networks representing media content. MF applies spatiotemporal and semantic signal processing to differentiate action responsiveness and information responsiveness. The extension of multimedia information processing into authoring enables generating interactive and impermanent media on computationally enabled devices. The outcome of this integrated approach with presented methodologies demonstrates a paradigmatic shift of the concept of UGC as personalized media network, which is dynamical and evolvable.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권6호
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• pp.2689-2708
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• 2016

Multi-camera systems which integrate two or more low-cost digital cameras are adopted to reach higher ground coverage and improve the base-height ratio in low altitude remote sensing. To guarantee accurate multi-camera integration, the geometric relationship among cameras must be determined through platform calibration techniques. This paper proposed a combined two-step platform calibration method. In the first step, the static platform calibration was conducted based on the stable relative orientation constraint and convergent conditions among cameras in static environments. In the second step, a dynamic platform self-calibration approach was proposed based on not only tie points but also straight lines in order to correct the small change of the relative relationship among cameras during dynamic flight. Experiments based on the proposed two-step platform calibration method were carried out with terrestrial and aerial images from a multi-camera system combined with four consumer-grade digital cameras onboard an unmanned aerial vehicle. The experimental results have shown that the proposed platform calibration approach is able to compensate the varied relative relationship during flight, acquiring the mosaicing accuracy of virtual images smaller than 0.5pixel. The proposed approach can be extended for calibrating other low-cost multi-camera system without rigorously mechanical structure.

• 대한기계학회논문집A
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• 제25권12호
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• pp.2078-2090
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• 2001

This paper deals with a precise position synchronous control by a cooperative control method of two axes rotating systems. First, the system's dynamics including motor drives described by a motor circuit equation and Newton's kinetic formulation about rotating system. Next, based on conventional PID(Proportional, Integral, Derivative) control law, current and speed controller are designed very simply to follow up reference speed correctly under some disturbances. Also, position synchronous controller designed to minimize position errors according to integration of speed errors between two motors. Then, the proposed control enables the distributed drives by a software control algorithm to behave in a way as if they are mechanically hard coupled in axes. Further, the stabilities and robustness or the proposed system are investigated. Finally, the proposed system presented here is shown to be more precise position synchronous motion than conventional systems through some simulations and experiments.

• Journal of Power Electronics
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• 제11권2호
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• pp.202-210
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• 2011

Polymer electrolyte membrane (PEM) fuel cell is one of the popular renewable energy sources and widely used in commercial medium power areas from portable electronic devices to electric vehicles. In addition, the increased integration of the PEM fuel cell with power electronics, dynamic loads, and control systems requires accurate electrical models and simulation methods to emulate their electrical behaviors. Advancement in parallel computation techniques, various real-time simulation tools, and smart power hardware have allowed the prototyping of novel apparatus to be investigated in a virtual system under a wide range of realistic conditions repeatedly, safely, and economically. This paper builds up advancements of optimized model constructions for a fuel cell stack system on a real-time simulator in the view points of improving dynamic model accuracy and boosting computation speed. In addition, several considerations for a power hardware-in-the-loop (PHIL) simulation are provided to electrically emulate the PEM fuel cell stack system with power facilities. The effectiveness of the proposed PHIL simulation method developed on Opal RT's RT-Lab Matlab/Simulink based real-time engineering simulator and a programmable power supply is verified using experimental results of the proposed PHIL simulation system with a Ballard Nexa fuel cell stack.

• 한국멀티미디어학회논문지
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• 제10권1호
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• pp.102-116
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• 2007

XML 기반의 미디에이터 시스템은 분산된 이질의 정보원들을 가상적으로 통합하는 방법 중의 하나이다. 이는 각 정보원을 하나의 가상의 XML 데이터베이스로 간주하고 XML 질의어로써 정보원에 접근한다. 본 논문은 사용자가 각 생물 정보원에 대한 XML 뷰를 융통성 있게 정의하고, 또한 정의한 XML 뷰를 기반으로 통합된 XML 질의를 쉽게 생성할 수 있는 사용자 인터페이스에 대한 설계 개념과 개발 결과를 제시한다. 개발된 인터페이스는 통합 스키마에 대하여 XML 뷰나 XML 질의를 손쉽게 생성할 수 있을 뿐 아니라, 하나 이상의 생물 정보원에 대한 질의 결과의 일부를 다른 생물 정보원의 입력 자료로 사용하는 워크플로우 형태의 질의 인터페이스 기능을 제공한다.

• 한국멀티미디어학회논문지
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• 제7권9호
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• pp.1304-1311
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• 2004

SMIL(Synchronized Multimedia Integration Language)은 각종 멀티미디어 데이터들 간의 동기화를 지원해 주며 데이터 요소들의 화면 구성을 편리하게 해줌으로써 인터넷 환경의 가상강의, 방송 등에서 널리 활용되고 있다. 응용분야가 다양하게 확대됨에 따라 각각의 환경에 융통성 있게 적용할 수 있는 체계의 필요성이 증대되고 있는 추세이며 이에 따라 SMIL 기능도 계속적으로 진화되고 있다. 본 논문에서는 SMIL의 주요 기능을 객체 지향적 방법론에 따라 분석, 모델링 한 후 서비스 컴비네이터 (service combinator) 개념의 클래스 모델을 제안하여 설계함으로써 필요시 사용자들이 자기 환경에 맞게 튜닝 할 수 있도록 하였다.

• Journal of Electrical Engineering and Technology
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• 제8권6호
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• pp.1431-1438
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• 2013

A pack-level battery hardware-in-the-loop simulation (B-HILS) platform is implemented. It consists of dynamic vehicle models using PSAT and multiple control interfaces including real-time 3D driving and GPS mode. In real-time 3D driving mode, user can drive a virtual vehicle using actual drive equipment such as steering wheel and accelerator to generate the cycle profile of the battery. In GPS mode, actual road traffic and terrain effects can be simulated using GPS data while the trajectory is displayed on Google map. In the latter part of the paper, several performance tests of an actual lithium-polymer battery pack are carried out utilizing the developed system. All experiments are conducted as parts of actual development process of a commercial battery pack adopting 2nd generation Prius as a target vehicle model. Through the experiments, the low temperature performance and fuel efficiency of the battery are quantitatively investigated in comparison with the original nickel-metal hydride (NiMH) pack of the Prius.

• 한국항행학회논문지
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• 제13권2호
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• pp.231-237
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• 2009

유비쿼더스 도시에 관한 각종 법률이 시행됨에 따라 유비쿼터스 기술과 산업을 융합하기 위한 기술이 부상하고 있다. 본 본문에서는 관련법 시행과 더불어 도시개발 사업이 진행됨에 따라 유비쿼터스 도시나 에코시티로 본격적으로 건설되는 상황에서 물리적 공간의 공용 사용과 물리적 시설의 기능 통합에 의한 유비쿼터스 기술을 융합시킬 수 있는 방법을 제안한다. 또한 제안한 방법을 이용하여 공동구와 통합 IP 풀의 적용 사례를 제시하여 이 분야의 체계화, 표준화, 정보화 기반을 마련할 수 있는 방안을 제시한다.