• 한국항공운항학회지
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• 제20권4호
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• pp.39-44
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• 2012

This paper propose a transmission method for "Transportation system" that can decide precise position under wide area road traffic environment. For precise position detecting, central station collect multiple receiver station's satellite navigation data and generate correction information. In this process, we need efficient real time transmission method for satellite navigation message that has variable data size. We propose real time data transmission method. This real time transmission method offer efficient processing structure for multiple receiver station's satellite navigation message. This paper explains proposed real time transmission method and proofs this transmission method.

• 산업공학
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• 제20권3호
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• pp.407-417
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• 2007

Owing to a real-time innovative infrastructure driven by destructive technology revolution, the business environment has been changed dramatically. In order to respond fast to a continuously and unpredictably changing business environment, the business entities, such as business process participants, customers, distributers, and partners, should have an agile paradigm which is able to acquire and share the real time information adaptively. As a 21st century business paradigm having such adaptability and responsiveness has been introduced and called the "Real-Time Enterprise (RTE)" strategy. In this paper, we investigate the various innovation cases adopting the RTE strategy. After briefly addressing the concept and the value of RTE strategy, we discuss the models and the frameworks used in outstanding international and domestic enterprises. We believe that this case study can provide a good guide to many enterprises planning to adopt a RTE strategy for building competitive advantage in today's world of global competition.

• 융합보안논문지
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• 제8권1호
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• pp.43-48
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• 2008

기존에는 Syslog 메시지를 확인하기 위해서는 Telnet에나 Console을 통해 대상 System에 로그인을 하여야 했다. 이는 System의 이상유무를 실시간으로 감시할 수 없는 단점이 있다. 이러한 단점을 해결하기 위해 본 논문에서는 Syslog 실시간 감시 시스템을 설계하였다. 제안된 시스템은 로그인 과정 없이 Syslog 메시지를 실시간 감시하여 System의 이상을 실시간으로 탐지함으로써 적시에 문제를 해결할 수 있다. 본 논문에서 제안된 실시간 모니터링 시스템은 Windows 기반으로 구성되었다.

• 제어로봇시스템학회논문지
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• 제14권4호
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• pp.376-380
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• 2008

This paper deals with a performance analysis of real-time control systems, which engages DMR(dual modular redundancy) to detect transient errors and checkpointing technique to tolerate transient errors. Transient errors are caused by transient faults and the most significant type of errors in reliable computer systems. Transient faults are assumed to occur according to a Poisson process and to be detected by a dual modular redundant structure. In addition, an equidistant checkpointing strategy is considered. The probability of the successful task completion in a real-time control system where periodic checkpointing operations are performed during the execution of a real-time control task is derived. Numerical examples show how checkpoiniting scheme influences the probability of task completion. In addition, the result of the analysis is compared with the simulation result.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 춘계학술대회 논문집 기술교육전문연구회
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• pp.90-95
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• 2003

For the safety driving of an automobile which is become individual requisites, a new Neural Network algorithm which recognized the load vehicles in real time is proposed. The proposed neural network technique is the real time computation method through the inter-node diffusion. In the network, a node corresponds to a state in the quantized input space. Each node is composed of a processing unit and fixed weights from its neighbor nodes as well as its input terminal. The most reliable algorithm derived for real time recognition of vehicles, is a dynamic programming based algorithm based on sequence matching techniques that would process the data as it arrives and could therefore provide continuously updated neighbor information estimates. Through several simulation experiments, real time reconstruction of the nonlinear image information is processed. 1-D LIPN hardware has been composed and various experiments with static and dynamic signals have been implemented.

• 산업공학
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• 제20권4호
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• pp.547-559
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• 2007

In this paper, we design Real-Time Postal Logistics Operational Model and System as a to-be system. Current postal logistics information system, named PostNet, is a basic infra system designed for an end-to-end IT-driven process, from mail acceptance to delivery, linked with internal and external systems. Recent competing circumstances drive demand for more intelligent information system. So we design real-time postal logistics operational system focused on site operations. we analyze postal logistics operation and interview field workers and establish real-time postal logistics operational model to solve operational issues. Finally we suggest system specifications.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.531-532
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• 2006

This paper presents the implementation of Real-time data acquisition system for dynamic characteristics of overhead contact wire in electric railway. The reconfigurable field-programmable gate array (FPGA) and LabVIEW graphical development tools have been used to Real-time monitoring system. The results from a field test show that the proposed technique and developed system can be practically applied to measure the assessment quantity or quantities on overhead contact lines for the online real-time process monitoring.

• 한국정보통신학회논문지
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• 제23권11호
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• pp.1482-1484
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• 2019

We present a method for transmitting 3D object information in real time in a telepresence system. Three-dimensional object information consists of a large amount of point cloud data, which requires high performance computing power and ultra-wideband network transmission environment to process and transmit such a large amount of data in real time. In this paper, multiple users can transmit object motion and facial expression information in real time even in small network bands by using GANs (Generative Adversarial Networks), a non-supervised learning machine learning algorithm, for real-time transmission of 3D point cloud data. In particular, we propose the creation of an object similar to the original using only the feature information of 3D objects using conditional GANs.

• 한국정보통신학회논문지
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• 제6권6호
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• pp.931-936
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• 2002

본 연구에서는 동영상정보의 암호화에 중점을 두어 보안성을 향상함으로써, 기존의 사용자인증 기법에 의존한 화상회의 시스템에 비해 기밀성과 무결성 측면이 강조된 실시간 동영상 암호화 기법을 적용한 화상회의 시스템을 구축하였다 송신자의 영상은 Vernam의 암호화 과정을 패킷 단위로 수신자에게 전송한다. 수신자는 전송되어진 영상을 받아서 합친 후 영상의 복호화과정과 압축 복원을 통해 영상을 출력할 수 있다. 이때, 암호화 및 복호화속도가 빠른 Vernam의 알고리즘을 사용함으로써 동영상의 실시간 암호화에 따른 전송속도지연 문제를 해결하였다. Vernam 알고리즘의 단순성 문제는 암호화 및 복호화에 사용되는 보안Key를Client와 Server간의 채널에서 이용할 Session Key를 RSA 알고리즘을 이용함으로써 해결하고자 하였다.

• 한국정보과학회논문지:시스템및이론
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• 제30권5_6호
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• pp.299-306
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• 2003

본 논문에서는 내장형 실시간 시스템의 성능 개선을 위한 리엔지니어링(performance re-engineering) 기법을 제시한다. 시스템 리엔지니어링은 구현이 완료된 시스템에서 새로운 성능 요구사항을 만족시키기 위한 일련의 작업이라 할 수 있다. 일반적으로 실시간 시스템의 성능은 실시간 처리량(real-time throughput)과 입출력 시간 지연(input-to-output latency) 등으로 기술할 수 있으며 새로운 성능 요구사항은 이와 같은 파라미터를 통해 기술된다. 본 연구의 리엔지니어링 기법은 두 단계로 구성된다. 첫째, 시스템을 프로세스 네트워크의 형태로 파악한 후, 프로세스의 수행시간을 분석하여 병목(bottleneck)이 되는 프로세스를 찾아낸다. 둘째, 병목 프로세스의 수행시간을 개선한 수 있도록 프로세싱 요소의 성능비례계수(performance scaling factor)를 구한다. 성능비례계수는 성능 개선을 비율로 나타낸 것으로서 리엔지니어링 비용을 최소화하도록 그 값을 구한다. 따라서 유도된 성능비례계수에 따라 하드웨어 장치를 업그레이드하면 하드웨어 비용을 최적화할 수 있다. 이러한 방법을 사용하면 소프트웨어를 수정할 필요가 없으며, 리엔지니어링 비용 및 시간을 단축할 수 있다.