• Journal of the Korean Society of Clothing and Textiles
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• v.4 no.1_2
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• pp.19-24
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• 1980

To study possible modification of acrylic fiber, Cashmilon SF was treated with hexamethylene-diamine(HMDA) in toluene at elevated temperature. Physico-chemical properties of treated fiber were tested by dyeing with benzyl scarlet BS and by measuring tensile strength of the fiber. Following results were obtained from this experiment. 1) HMDA and fiber were condensed at above $120^{\circ}C$. 2) Treated samples could be dyed with acidic dyes. 3) Treatment with HMDA decreased tensile strength of the fiber. This study therefore suggests that HMDA can be used to modify the properties of the fiber.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.11a
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• pp.439-442
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• 2003

The test method of ASTM E 756 and JIS G 0602 to estimate vibration-damping properties is presented. Measurement method depending on specimen support, exciting method and calculation method for loss factor is used. Half-power bandwidth method and vibration decay method is used in the calculation method for loss factor, and Young's modulus is decided by geometric character and density for specimen and resonance frequency. Vibration measurement sensor is compared by using non-contact displacement detector, velocity detector and accelerometer. The cause of measurement error is also presented.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2004.07b
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• pp.710-713
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• 2004

The design, simulation, modeling and measurement of a low temperature co-fired ceramic (LTCC) RF switch module for GSM applications is presented in this paper. RF switch module is constructed using a Rx/Tx switching circuit and integrated low pass filter. The low pass filter function was designed to operate in th GSM band. Insertion and return loss of the low pass filter were designed less than 0.3 dB and better than 12.7 dB at 900 MHz. The RF switch module contained 10 embedded passives and 3 surface mount components integrated on $4.6{\times}4.8{\times}1.2$ nm, 6-layer multi-layer integrated circuit. The insertion loss of switch module was measured at 900 MHz was 11 dB.

• 유체기계공업학회:학술대회논문집
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• 2004.12a
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• pp.604-608
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• 2004

Experimental study was conducted to increase the oxygen transfer efficiency of air diffusers in clean water. By measuring the bubble size from the bubbly two-phase flow visualization with several air diffusers the size of air bubbles near the top surface of aeration tank seems to be independent on the diffuser types. Considering design parameters for the better breakup of larger bubbles around the air diffusers, advanced conceptual air diffusers using nozzle-type throat showing the higher oxygen transfer efficiencies were made.

• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.241-242
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• 2008

• Journal of Power System Engineering
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• v.22 no.1
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• pp.64-71
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• 2018

Currently, functional patterns are formed by screen printing on stretchable films, and they are applied to wearable and stretchable devices. In this study, three types of silver paste were prepared using three polyester binders with different Tg and molecular weights in order to impart elasticity to the conductive pattern itself. Rheological properties and DSC measurements were performed for each silver paste. Then, each silver paste was screen printing and cured by an IR dryer to evaluate adhesive strength, pencil hardness, resistance and surface shape change according to strain. As a result, it was found that the silver paste using a binder with a low Tg and a high molecular weight has the smallest resistance change depending on the strain. Namely, it was found that it is most preferable to use a binder with a low Tg and a high molecular weight as the stretchable electrode.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.305-306
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• 2016

최근에 게임 플레이어들을 노리는 악성코드가 발견돼 사용자들의 주의가 필요하다. 게임 플레이어를 노리는 악성코드는 이전부터 존재해왔지만 이번에 발견된 악성코드는 게임 콘텐츠로 위장한 사례로, 직.간접적으로 게임을 즐기는 불특정 다수를 대상으로 하고 있다. 본 논문에서는 게임 콘텐츠를 위장하여 악성코드를 이용한 사이버 공격에 대한 사전 차단을 위하여 악성코드 탐지엔진에서 수집된 트래픽 정보로부터 악성링크를 판단할 수 있는 실시간 악성링크 탐지 기능을 제안한다.

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.276-278
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• 2008

IEC 61850 기반의 클라이언트의 적합성 검사를 시행할 방법이 아직 체계적으로 정립되어 있지 않다. 이에 본 논문에서는 클라이언트의 적합성 검사를 위한 관리 프로그램의 구현을 위해 소프트웨어 개발 방법론을 적용하여 설계하고 이에 대한 자세한 내용을 다룬다.

• Proceedings of the KIEE Conference
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• 2007.11b
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• pp.190-192
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• 2007

PICOM (Piece of Information for COMmunication)은 논리노드 간에 교환되는 정보를 기술하기 위하여 정의되어 있다. 변전소의 기능은 여러 논리노드로 분할되어 서로 상호작용하며 동작한다. 변전소 자동화 시스템 검사는 단일 IED만의 기능 시험이 아니며 IED들간에 메시지를 교환을 통하여 변전소 기능을 정의된 성능을 만족하며 수행하는지 검사하는 것이다.

• Proceedings of the Korean Vacuum Society Conference
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• 2009.08a
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• pp.79-79
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• 2009