• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.4B
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• pp.338-344
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• 2002

This paper proposes a transient (predictive) connection admission control (CAC) scheme using the transient quality of service (QoS) measure for CDMA cellular systems with bursts On-Off sources. We need an approximate and bounded approach for real-time CAC applications. We derive the transient outage probability as the QoS measure using the Chernoff bound and the refuted large deviation approximation. Numerical results show that the predictive CAC is a promising approach for the multicell CDMA systems.

• Honam Mathematical Journal
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• v.33 no.4
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• pp.487-493
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• 2011

The Fisher information matrix plays a significant role in statistical inference in connection with estimation and properties of variance of estimators. In this paper, we define the parameter space of the t-manifold using its Fisher's matrix and characterize the t-manifold from the viewpoint of information geometry. The ${\alpha}$-scalar curvatures to the t-manifold are calculated.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.7
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• pp.1100-1105
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• 2002

As Unix based server including Linux are increased steadily, MS group users who want to connect these servers are increased. There were lots of connection using traditional network services like telnet or ftp for a long while, but connection using "TTSSH or PuTTY" which get used free have been increasing since “secure shell”(SSH) appeared. This paper compare TTSSH ＆ PuTTY′s characters and using method, and propose remote-access tool which improve TTSSH for MS group users.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10c
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• pp.422-424
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• 2000

웹서버는 disk I/O 오버헤드를 줄이기 위해 웹 문서를 메모리 캐슁한다. 하지만 동시에 들어오는 connection들에 대해 처리 순서는 고려하지 않으므로 같은 문서를 요구하는 request들이 메모리 캐쉬의 working set내에 들어오지 않을 경우 disk I/O를 추가시킬 수 있다. 본 논문에서는 동시에 처리해야 할 같은 작업량을 요구하는 request는 연속적으로 처리함으로써 disk I/O 오버헤드를 줄이는 우선 순위 스케쥴링을 수행함으로써 정적 웹 환경서의 사용자 응답 시간을 줄였다.

• Proceedings of the IEEK Conference
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• 1998.06a
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• pp.909-912
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• 1998

In this paper, a new connection admission controller using neural network is presented. The controller measures traffic flow, cell loss rate, and cell delay periodically. Using those measured information, it learns the distributions of traffics of each traffic. Also the proposed controller is able to measure and manage the delays that source traffics experience through the network by using DWRR multiplexer with buffers dedicated to each traffic source. Experimental result show that the heterogeneous traffic sources with various QoS requirement.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.418-422
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• 2002

As Unix based server including Linux are increased steadily, MS group users who want to connect these servers are increased. There were lots of connection using telnet for a while, but there are increased connection using "TTSSH or PUTTY" which get used free since "secure shell"(SSH) appeared recently. This paper compare TTSSH & PuTTY′s characters and using method, and propose remote-access tool which improve TTSSH.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.1051-1054
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• 2000

IMT-2000 moving picture messaging service is a primary auxiliary connection service that allows a caller to leave a message when the caller can not complete the call. As the number of service subscriber for wireless communication is dramatically increased, various wireless services as well as simple connection service are requried IMT-2000 moving picture messaging service increases the call completion rate and makes it possible to provide various services.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.493-495
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• 2002

본 연구에서는 TCP Connection을 유지하는 Stepping Stone 형태의 공격을 역추적하기 위해 사용되는 패킷 워터마크를 검출하는 시스템의 구현에 대해서 기술하고 있다. 본 연구에서 사용한 패킷 워터마크는 Sleepy Watermark Tracing(SWT)에서 사용한 virtual null string 형태의 워터마크를 사용하였으며, 이러한 워터마크의 효율적인 탐지 및 분석하는 방법을 설계 구현하였다. 본 연구의 의의는 패킷 워터마크 검출 시스템의 실제 구현을 통하여 TCP Connection Traceback 형태의 침입자 역추적 시스템에 활용할 수 있다는 것이다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10e
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• pp.145-147
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• 2002

본 논문에서는 네트워크 통신으로 생성된 데이터를 분석하여 서버의 부하를 예측함으로 서버의 성능을 향상시킬 수 있는 모너터링 툴을 설계하였다. 현재 리눅스에서 제공되는 서버 부하 정보는 시스템의 총괄적인 정보에 국한하고 있다. 본 논문에서 제한하는 새로운 부하 정보는 per-connection에 관한 것이다. 서버가 per-connection에 대한 정보를 알 수 있다면 각각의 클라이언트에 대한 정보를 알 수 있어 차별적인 서비스를 제공하는 것과 함께 모든 클라이언트에 대한 균등한 대역폭을 보장할 수 있다. 그래서 본 논문은 기존의 모니터링 툴이 제공하지 않는 Per-connection의 데이터를 얻어 분석을 할 수 있는 CoreMon이라는 툴을 설계하였다.

• Journal of Korean Library and Information Science Society
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• v.32 no.3
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• pp.227-247
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• 2001

The main purpose of this research is two kinds. First, explain the connection residing process of the Baik Dal-Soon(白達淳)'s house which is located at the Kumgok of Yongsanmyon Sanggumri, Jhanghung County, Chonnam Province in Korea. Second, analyse the collected process of old books which have been transmitted to a he's family. The result is as follows. First, the Kumgok has been connection resided Kawngju Lee family(廣州 李氏), Yongkwang Kim family(靈光 金氏), Suwon Baik family(水原 白氏) order by marriage connection. Second the most of old books transmitted to a he's family have been colleoted by Baik Jin-Hang (白鎭恒, 1760∼ 1818).