• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.133-136
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• 2000

자바에서 또한 이러한 병행성 프로그램을 지원하기 위한 다양한 언어적 지원과 병행적인 요건을 지원하고 있다. Thread class지원, Synchronized 예약어, 상호협동 관계를 표현하기위한 wait(), notify(), notifyAll() 메서드 , monitor 메커니즘등을 지원하고 있다. 하지만 이는 아주 저 수준의 지원형태이며 여러 가지 문제점을 야기할 수 있다. 이에 대해 병행적 이론의 정수라고 할 수 있는 pi-calculus의 이론과 기법을 도입하여 새로운 시각으로 병행성 프로그래밍에 대한 접근을 하고자 한다. 여기에 실용적으로 많이 사용되고 발전되어온 자바에서 적용하고자 한다. pi-calculus에 기반한 pict를 모델로 하여 pict에서 지원하는 아주 명료한 연산자와 current object를 도입함으로써 보다 표현력과 확장성, 검증성이 뛰어난 고 수준 자바 라이브러리를 설계하고자 한다.

• Journal of Platform Technology
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• v.6 no.1
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• pp.17-23
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• 2018

Taxi's queue for entering into taxi stand makes traffic jam and congestion around taxi stand. If we make that taxi waits in another place around taxi stand, and can approach to taxi stand when it gets in its turn, these traffic jam and congestion around taxi stand can be reduced. In this paper, we propose entry sequence operating system for taxi stand to reduce traffic jam and congestion around taxi stand. In this system, taxi driver can request his sequence number, and the system issues sequence number to driver. When it is time to approach to taxi stand due to issued sequence number, the proposed system notifies to taxi driver via taxi terminal. Taxi getting the proposed service can wait in another place around taxi stand, and can approach to taxi stand after receiving notify for approaching. Therefore, the proposed system in this paper can reduce traffic jam and congestion around taxi stand because it can reduce or get rid of taxi's queue around taxi stand. We implement the taxi stand approach sequence management system proposed in this paper for taxi stand installed in Chungju-Si, Chungbuk. We use Google Cloud service and Android platform for implementing.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.8 no.2
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• pp.86-100
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• 2015

Cloud computing is a computing term that evolved in the late 2000s, based on utility and consumption of computer resources. Google say that "Cloud computing involves deploying groups of remote servers and software networks that allow different kinds of data sources be uploaded for real time processing to generate computing results without the need to store processed data on the cloud. Cloud computing relies on sharing of resources to achieve coherence and economies of scale, similar to a utility (like the electricity grid) over a network. At the foundation of cloud computing is the broader concept of converged infrastructure and shared services. Cloud computing, or in simpler shorthand just "the cloud", also focuses on maximizing the effectiveness of the shared resources." The cloud service is a smart and/or intelligent service to save private files in any device, anytime, anywhere. Dropbox, OAuth, PAClous are required that the accumulated user's data are archives with cloud service. Currently we suggest an implementation technique to process many tasks to the cloud server with a thread pooling. Thread pooling is one of efficient implementating technique for client and service environment. In this paper, to present the implementation technique we suggest three diagrams in the consideration of software engineering.