• 한국정보시스템학회지:정보시스템연구
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• 제5권
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• pp.411-427
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• 1996

As the application of real time expert systems has been expanded, the real time expert systems have become an integral part of the information society. Real time expert systems are viewed as a new paradigm to integrate real time problem solving and expert system technology. However, a substantial amount of work is still required to effectively handle a new and challenging opportunity for successful implementation of real time expert systems. In this article, the basic concepts and characteristics of real time expert systems are discussed. The article also presents, through the literature survey, the summary of real time expert systems applications and a class of tools, providing an enabling real time based expert system technology. Finally, the article discusses a set of requirements which real time expert systems must satisfy.

• 대한음성학회지:말소리
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• 제44호
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• pp.93-104
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• 2002

There are many speech analysis tools available. Among them real-time analysis tool is very useful for interactive experiments. A real-time speech analysis tool was implemented using Matlab. Matlab is a very widely used general purpose signal processing tool. In general, its computational speed is relatively lower than that of the codes from conventional programming languages. Especially, real-time analysis including input of signal and output of the result was not possible in the past. However, due to the improvement of computing power of PCs and inclusion of real-time I/O toolboxes in Matlab, real-time analysis is now possible in some extent by Matlab only. In this experiment, we tried to implement a real-time speech analysis tool using Matlab. Pitch and spectral information is computed in real-time. From the result it is shown that such real-time applications can be implemented easily using Matlab.

• 한국정보처리학회논문지
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• 제1권3호
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• pp.357-366
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• 1994

IEEE 802.4 토큰버스 방식이 산업용 네트워크에 있어서 표준으로 넓게 받아들여지 고 있다. 802.4에서는 정보의 교환을 제어하기 위해 일종의 타이머를 사용하여 트래 픽의 다중 클래스를 지원한다. 실시간 처리를 위한 802.4 기능의 시간 할당방법은 실제 생산 공정에서 요구되는 실시간 제어응용에서 최악의 상태 억세스 요구를 만족하 도록 타이머들이 설정되어야 한다. 물론 시간에 제약을 받지 않은 다른 응용들도 동시 에 지원될 수 있다. 본 논문에서는 실시간 처리를 위하여 토큰 버스 네트워크 운영시 타이머 할당 구조에 따른 최소한의 대역폭 할당을 위하여 알고리즘을 제안하고 해석 적 방법과 이의 시뮬레이션을 수행하여 타이머 할당과 유용도 산출에 대한 성능을 해 석하였다.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제23권6호
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• pp.392-396
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• 2017

모바일 기기 관련 기술의 급속한 발달에도 자원 제약적인 특성으로 인한 많은 문제들이 아직까지 해결되지 못하고 있다. 이러한 물리적인 한계성을 극복하기 위해 인터넷으로 연결된 클라우드 서버의 자원을 활용하는 컴퓨테이션 오프로딩이 고안되었고 에너지 절약 측면에서 다양한 연구들이 진행되었다. 그러나 실시간성을 만족시켜야 하는 응용에서는 에너지 보다 마감시간 내에 작업의 수행을 완료하는 것이 더 중요하다. 본 논문에서는 이러한 실시간 응용을 지원하기 위해서 클라우드의 스케줄링 지연 시간을 고려한 오프로딩 결정 기법을 제안했다. 제안 기법에서는 오프로딩의 예상 여유시간과 모바일 기기 내에서 수행했을 때의 여유 시간을 비교하여 마감시간을 더 효과적으로 만족할 수 있는 방법을 선정함으로써 실시간 작업에 대한 신뢰성을 향상 시킬 수 있다.

• Journal of Computing Science and Engineering
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• 제7권2호
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• pp.89-98
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• 2013

This paper presents a complete survey of recent techniques that are applied in the field of real-time Java computing. It focuses on the issues that are especially important for hard real-time applications, which include time predictable garbage collection, worst-case execution time analysis of Java programs, real-time Java threads scheduling and compiler techniques designed for real-time purpose. It also evaluates experimental frameworks that can be used for researching real-time Java. This overview is expected to help researchers understand the state-of-the-art and advance the research in real-time Java computing.

• 한국통신학회논문지
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• 제29권1C호
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• pp.157-165
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• 2004

Real-time(RT) object-oriented(OO) distributed computing is a form of RT distributed computing realized with a distributed computer system structured in the form of an object network. Several approached proposed in recent years for extending the conventional object structuring scheme to suit RT applications, are briefly reviewed. Then the approach named the TMO(Time-triggered Message-triggered Object)structuring scheme was formulated with the goal of instigating a quantum productivity jump in the design of distributed time triggered simulation. The TMO scheme is intended to facilitate the pursuit of a new paradigm in designing distributed time triggered simulation which is to realize real-time computing with a common and general design style that does not alienate the main-stream computing industry and yet to allow system engineers to confidently produce certifiable distributed time triggered simulation for safety-critical applications. The TMO structuring scheme is a syntactically simple but semantically powerful extension of the conventional object structuring approached and as such, its support tools can be based on various well-established OO programming languages such as C++ and on ubiquitous commercial RT operating system kernels. The Scheme enables a great reduction of the designers efforts in guaranteeing timely service capabilities of application systems. Start after striking space key 2 times.

• Journal of information and communication convergence engineering
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• 제1권1호
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• pp.12-22
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• 2003

Real-time(RT) object-oriented(OO) distributed computing is a form of RT distributed computing realized with a distributed computer system structured in the form of an object network. Several approached proposed in recent years for extending the conventional object structuring scheme to suit RT applications, are briefly reviewed. Then the approach named the TMO (Time-triggered Message-triggered Object) structuring scheme was formulated with the goal of instigating a quantum productivity jump in the design of distributed time triggered simulation. The TMO scheme is intended to facilitate the pursuit of a new paradigm in designing distributed time triggered simulation which is to realize real-time computing with a common and general design style that does not alienate the main-stream computing industry and yet to allow system engineers to confidently produce certifiable distributed time triggered simulation for safety-critical applications. The TMO structuring scheme is a syntactically simple but semantically powerful extension of the conventional object structuring approached and as such, its support tools can be based on various well-established OO programming languages such as C++ and on ubiquitous commercial RT operating system kernels. The Scheme enables a great reduction of the designers efforts in guaranteeing timely service capabilities of application systems

• 전기전자학회논문지
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• 제5권2호
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• pp.164-173
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• 2001

본 논문은 독립적으로 움직이면서 시간 제약을 만족시키는 새로운 내장형 실시간 시스템을 설계하며 구현하였다. 본 논문에서의 실시간 시스템 커널은 시간적인 요소를 가장 핵심으로 고려하여 설계되었다. 따라서 실시간 커널은 작은 용량을 가지며 빠르게 예측하며, 실시간 스케줄링에 요구되는 많은 변화들을 통해서 실시간 커널에 융통성을 부여한다. 제안한 실시간 커널은 경성 실시간 제약 조건인 인터럽트 지연 시간, 스케줄링의 정확성, 메시지 전달시간을 만족하기 위하여 실시간 커널에는 실시간 태스크 처리와 인터럽트 처리, 타이밍을 처리하도록 하였고 비 실시간 커널은 일반적인 태스크를 처리하도록 하였다. 제안된 실시간 시스템은 RT-Linux, QNX와 인터럽트 지연, 스케줄링 정확성, 메시지 전달시간 등을 비교 분석하여 효율성을 입증하였다.

• Journal of information and communication convergence engineering
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• 제11권4호
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• pp.253-257
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• 2013

Mobile computers can process large amounts of data at high speeds, and it is feasible and easy to implement a remote monitoring system utilizing mobile computers. Because of their portability and convenience, these computers have been employed in various research areas to develop such monitoring systems. Existing monitoring system is a bit difficult to real time monitoring the scattered offshore facilities. So this paper compensate the existing system by using mobile computers such as a tablet PC-based monitoring system. Also, the scattered offshore facilities can be monitored in real-time through the tablet PC. The developed monitoring system is a fully Internet-based monitoring platform that enables one to monitor and control remote oceanic applications at any time and any place where it is possible to access the Internet. It can be applied to many oceanic applications as well as the unmanned systems and remote monitoring systems on land.

• 한국정보통신학회논문지
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• 제6권6호
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• pp.863-872
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• 2002

Real-time(RT) object-oriented(00) distributed computing is a form of RT distributed computing realized with a distributed computer system structured in the form of an object network. Several approached proposed in recent years for extending the conventional object structuring scheme to suit RT applications, are briefly reviewed. Then the approach named the TMO(Time-triggered Message-triggered Object) structuring scheme was formulated with the goal of instigating a quantum productivity jump in the design of distributed time triggered simulation. The TMO scheme is intended to facilitate the pursuit of a new paradigm in designing distributed time triggered simulation which is to realize real-time computing with a common and general design style that does not alienate the main-stream computing industry and yet to allow system engineers to confidently produce certifiable distributed time triggered simulation for safety-critical applications. The TMO structuring scheme is a syntactically simple but semantically powerful extension of the conventional object structuring approached and as such, its support tools can be based on various well-established 00 programming languages such as C++ and on ubiquitous commercial RT operating system kernels. The Scheme enables a great reduction of the designers efforts in guaranteeing timely service capabilities of application systems.