• Journal of applied mathematics & informatics
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• v.29 no.5_6
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• pp.1117-1127
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• 2011

In this paper, a class of more general delayed viral infection model with lytic immune response is proposed by Song et al.[1] ([Journal of Mathematical Analysis Application 373 (2011), 345-355). We derive the basic reproduction numbers $R_0$ and $R_0^*$ 0 for the viral infection, and establish that the global dynamics are completely determined by the values of $R_0$ and $R_0^*$. If $R_0{\leq}1$, the viral-free equilibrium $E_0$ is globally asymptotically stable; if $R_0^*{\leq}1$ < $R_0$, the immune-free equilibrium $E_1$ is globally asymptotically stable; if $R_0^*$ > 1, the chronic-infection equilibrium $E_2$ is globally asymptotically stable by using the method of Lyapunov function.

• 대한생식의학회:학술대회논문집
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• 1997.11a
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• pp.50.2-51
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• 1997

• Proceedings of the KIEE Conference
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• 2004.07e
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• pp.68-71
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• 2004

Frequency is an important operating parameter of a power system. Electric power systems sustain transient frequency swings whenever the balance between generation and load does not no longer hold. To cope with this Constraints, it requires an accurate and high speedy frequency deviation estimation technique and suitable adjustment to obtain the power system energy balance. This paper describes the design, computational aspects and implementation of an iterative technique for measuring power system. The rate change of the phase angle is used for estimation. To confirm the validity of the proposed algorithm, the simulation studies carried out on a typical 154[KV] double T/L system by using EMTP software. Some test results are presented in the paper.

• 한국지구물리탐사학회:학술대회논문집
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• 2000.09a
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• pp.87-111
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• 2000

In this study, we describe the principle and result of geophysical techniques which are widely used in geotechnical survey. Also we discuss two case histories. One is discrimination of limestone cavity areas by resistivity, seismic tomography, televiewer, well logging, and the other is discrimination of coal by resistivity, electromagnetic method, resistivity tomography.

• Proceedings of the KIEE Conference
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• 2005.10a
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• pp.145-149
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• 2005

Frequency is an important operating parameter of a power system. Electric power systems sustain transient frequency swings whenever the balance between generation and load does not no longer hold. To cope with this Constraints, it requires an accurate and high speedy frequency deviation estimation technique and suitable adjustment to obtain the power system energy balance. This paper describes the design, computational aspects and implementation of an iterative technique for measuring power system. The rate change of the phase angle is used for estimation. To confirm the validity of the proposed algorithm, the simulation studies carried out on a typical 154[KV] double T/L system by using EMTP software. Some test results are presented in the paper.

• 대한생식의학회:학술대회논문집
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• 2002.11a
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• pp.71-71
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• 2002

• 대한생식의학회:학술대회논문집
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• 1999.11a
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• pp.55.1-55.1
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• 1999

• Proceedings of the KIPE Conference
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• 2001.07a
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• pp.615-618
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• 2001

In this paper, a solution of network management system for power plant was introduced. In conventional systems, power installations use serial communication or MODEM for Management. In this case, it has a weak point in distance and speed. To solve these problems, the manage system based on Ethernet was developed. In order to implement, SNMP which is standard NMS of LAN was adapted, agent board and manager program for SNMP were developed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.447-449
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• 2017

리그 오브 레전드, 히어로즈 오브 더 스톰 등으로 대변되는 다자 온라인 전투 게임(MOBA)은 PC 버전에서 우리 게이머가 아주 많이 플레이하는 장르이다. 본 논문은 이 장르의 모바일 버전인 2017년작 펜타스톰의 사용자 인터페이스를 PC 버전의 인터페이스와 물리적 구조 및 기능성에 대해 비교 분석하고 코호넨의 휴리스틱에 기초한 사용자 인터페이스의 조작 편의성에 집중한 설문 조사를 통해 펜타스톰 사용자 인터페이스의 만족도와 개선 방향을 살펴보았다. 4점 척도로 적극적 평가를 요구한 8개의 설문에서 펜타스톰 사용자 인터페이스는 5개 부문에서 80% 이상의 긍정률을 보였지만 아이템 구매 관련은 호불호가 갈렸고 캐릭터 동선과 상대 지정 부분은 상대적으로 낮은 긍정률을 보여 개선의 필요성을 나타냈다.

• 대한예방의학회:학술대회논문집
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• 1998.10b
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• pp.40-41
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• 1998