• Journal of the Korea Society of Computer and Information
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• v.13 no.7
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• pp.59-66
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• 2008

This paper describes a novel method for identifying the main topic and detecting topic changes in a text-based dialogue as in Instant Messaging (IM). Compared to other forms of text, dialogues are uniquely characterized with the short length of text with small number of words, two or more participants, and existence of a history that affects the current utterance. Noting the characteristics, our method detects the main topic of a dialogue by considering the keywords not only the utterances of the user but also the dialogue system's responses. Dialogue histories are also considered in the detection process to increase accuracy. For topic change detection, the similarity between the former utterance's topic and the current utterance's topic is calculated. If the similarity is smaller than a certain threshold, our system judges that the topic has been changed from the current utterance. We obtained 88.2% and 87.4% accuracy in topic detection and topic change detection, respectively.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.12
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• pp.2321-2328
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• 2006

Today, SIP standard (The signalling protocol for the Internet phone service) raises to be the standard technique because the expandability is high and complexity is low. It is widely investigated and actively advocated to use Si81a1 ring protocol for SIP in VoIP service. SIP service can be applied even outside the Internet phone service; instance messaging and various multimedia technology are just an example. This paper proposed an embodiment proxy server for rambling support to use JAIN SIP API. It provides standard interface for testing the Proxy server for SIP and embodiment of user agent that transfer instant massaging and voice communication.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.285-292
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• 2002

A cluster tool for semiconductor manufacturing is an integrated device that consists of several single wafer processing modules and a wafer transport module based on a robot. The distributed module controllers are integrated by an inter-module communication network and coordinated by a centralized controller, called a cluster tool controller (CTC). Since the CTC monitors and coordinates the distributed complex module controllers for advanced process control, complex commuication messaging and services between the CTC and the module controllers are required. A SEMI standard, CTMC(Cluster Tool Module Communication), specifies application-level communication service requirements for inter-module communication. We propose the use of high-level fieldbuses, for instance. PROFIBUS-FMS, for implementing CTMC since the high-level fieldbuses are well suited for complex real-time distributed manufacturing control applications. We present a way of implementing CTMC using PROFIBUS-FMS as the communication enabler. We first propose improvements of a key object of CTMC for material transfer and the part transfer protocol to meet the functional requirements of modem advanced cluster tools. We also discuss mapping objects and services of CTMC to PROFIBUS-FMS communication objects and services. Finally, we explain how to implement the mappings.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.486-489
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• 2013

현재 IT 인프라 기술이 상당한 발전을 이루고 있으며 고급 인프라를 활용한 IT 기술들이 나날이 발전하고 있다. 지금의 정보화 사회에 지대한 영향을 미치고 있는 인터넷을 포함한 수 많은 IT 정보기술들은 각 사회분야에 걸쳐 해당 분야의 정보의 질을 높이고 있다. CTI (Computer Telephony Integration) 기반 콜센터 시스템 또한 IT 인프라의 발전에 발 맞추어 효율적인 정보 제공을 위한 정보 기술이 상당히 많이 발전해왔다. 기존의 콜센터 시스템은 PSTN 망 기반의 전화 중심의 정보제공만 가능한 반면에, 현재 콜센터 시스템은 PSTN 기반이 아닌 IP 기반 인프라를 활용하여 IP 기반으로 제공할 수 있는 여러 기술을 접목시킨 하나의 통합 솔루션 시스템으로 발전하고 있다. 콜과 관련된 서비스만 제공하는 것이 아니라 Fax, E-mail, Instance Messaging 등 여러종류의 서비스를 제공하기 위해 시스템 구성이 변화하고 있는 추세이다. 하지만 현재 콜센터 시스템은 청각장애인을 위해 제공할 수 있는 서비스가 존재하지 않으며 이에 대한 연구 또한 미비한 상태이다. 이에 본 논문에서는 청각장애인을 위한 서비스 제공을 위해 스마트폰 인프라에서 서비스를 제공 받을 수 있는 CTI 시스템을 설계 하였다.