• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2001.11a
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• pp.106-110
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• 2001

In this paper, a broadband sleeve monopole antenna using a loading coil in sleeve is proposed. The antenna of the proposed structure has the same of the single sleeve monopole antenna, except for using the coil instead of the inner conductor in sleeve. As a result, it is found that the bandwidth is 1.239～2.154 GHz(above 53.9%) for S$\sub$11/=-10dB(VSWR<2), and the antenna impedance is good for a communication system and feeder which the impedance has 50$\Omega$.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.266-266
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• 2004

광통신 커넥터 핵심 부품인 페룰(Ferrule)은 광통신의 주요한 커넥터 부품으로 사용되며 슬리브내에서 페룰을 서로 맞대어 광섬유론 정렬하는데 사용이 된다. 광섬유의 맞대기가 정확하고 광학 특성에 영향을 주지 않도록 하기 위해서는 페룰의 외경과 표면의 초정밀 가공이 주요한 품질 특성이 된다. 페룰은 고경도 난삭재의 소구경 세라믹 재질이며 이의 가공을 위해서는 다이아몬드 연삭숫돌을 이용한 무심연삭(centerless grinding) 장치를 사용한다.(중략)

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05d
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• pp.449-454
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• 1996

원자력발전소 증기발생기 전열관의 레이저 슬리브 용접시, 레이저 전송 및 용접상태의 광학적 감시방법을 개발하였다. 전열관 레이저용접은 용접 중의 레이저 출력, 레이저 전송 광학계의 파손여부, 광학 정렬상태 등을 정확히 감시하며 수행하여야 하지만, 작업공간의 협소함과 방사능 공간이라는 어려움 때문에 적절한 감시방법이 없었다. 본 연구에서는 레이저 빔 전송을 위한 광섬유 광학계를 그대로 이용하여, 용접시 발생되는 radiation과 용접 표면에서 반사되는 Nd:YAG 레이저 빔을 측정하여 레이저 및 광학계 상태를 실시간 감시할 수 있는 기술을 실험적으로 확인하였다. 실험은 Inconel plate를 시편으로 이루어졌으며, 레이저 펄스길이, 레이저 반복률에 따른 감시 조건과 초점확인 기능에 대해서도 논의하였다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.233-234
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• 2023

This paper confirms the application sites of dry coupler technology, which is a direct connection method using screw threads, and Unlike wet couplers, this method can stand on its own without proof support and continuous work on the upper part. Furthermore, concludes with personal considerations to improve constructability.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.167-168
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• 2022

본 논문에서는 접지계통에 사용되는 접속계수에 대한 열화특성 분석을 기술한다. 그 접지 시스템의 연결 방법은 IEC 표준에 명시되어 있습니다. 연결부의 열화 특성을 분석하기 위해 인자, 연결 인자를 소금물과 지하에 묻었을 때 열화 시험을 수행하였다. 테스트 연결 계수 C형 슬리브, 클램프 및 발열 용접이 있었습니다. 그 결과, 접속 인자의 대부분이 부식되었고, 전기적 요인이 발생하였다. 저항은 악화된 후에 감소했다. 분석 결과는 접지 시스템의 안전성을 확립하는 데 사용될 수 있다

• Transactions of the Korean Society of Mechanical Engineers B
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• v.37 no.3
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• pp.213-219
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• 2013

This study examined the static characteristics of a spool valve with a hybrid lap between the spool land and the sleeve. The static equation for the pressure characteristics was derived from flow equations that depend on the spool displacement, and the final model was derived from $q_a=q_b=0$ because the pressure characteristics test needs to block the control port in the valve. The static equation for the flow characteristics was derived from the pressure characteristics when the control port is open ($q_a=q_b$, $p_a=p_b$). The characteristic equation in the shifted region was assumed from the proportional relationship between the pressure-flow characteristics and the spool displacement.

• Journal of the Korean Society of Clothing and Textiles
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• v.39 no.6
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• pp.852-866
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• 2015

This study analyzes the form of sleeve heads, which is an important internal element that affects the appearance of jacket sleeves. It characterized sleeve head forms by investigating angles, materials, and a combination of formations for 50 sleeve heads. It conducted an appearance evaluation by comparing and analyzing the results. This paper develops a sleeve head appropriately for sleeve construction. The study results are as follows. First, the product was divided into three parts: based on, force receiving, and sleeve cap parts. There were four types of man's sleeve head: straight, arc, and curve A and B types. The woman's sleeve head had two types: straight and curve B type. Second, the feature of each type of sleeve head was analyzed. A straight type emphasized the based on part. An arc type highlighted the force receiving part while the based on part decreased. The sleeve cap part, force receiving part, and based on part were emphasized in the arc type sleeve head. Third, as a result of the appearance evaluation, each type was rank as straight type < arc type ${\leq}$ curve A < curve B. The straight type did not get positive results as it had extra ease when the sleeve head was attached to a Jacket Sleeve. The arc type was evaluated poorly due to an inappropriate sleeve cap composition. The curve type received an excellent overall outcome as it fit into the sleeve cap part well and highlighted the force receiving part in order to minimize front and back wrinkles. Therefore, the curve type made the resemblance of the jacket appearance perfect and closest to the sleeve pattern.

• Journal of the Korean Society of Clothing and Textiles
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• v.40 no.2
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• pp.365-381
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• 2016

This study compared and analyzed current sleeve head products for men and women to develop sleeve head products for aesthetically-designed sleeves. Men and women's sleeve head products, suitable for sleeve caps, were designed and developed based on the results. The study results are as follows. First, men and women's sleeve heads for aesthetic jacket sleeves were designed with sleeve patterns in the background. Sleeve heads and upper sleeves were additionally designed to make 7-layers for men and 4-layers for women. Second, sleeve head patterns were designed so that men's would have a whole length of 48cm, an angle of $30^{\circ}$ and a width of 4.5-7.5cm; in addition, women's would be 40cm, $30^{\circ}$ and 4-5cm. Third, the same materials were used for men's and women's sleeve head products, and the background was made from 1-layer of soft non-woven fabric. As for the sleeve heads, 2-layers and 1-layer of non-fusible interlinings were used for men's and women's, respectively. In order to provide flexibility, the materials were designed in a bias direction. For upper sleeves, 1-layer of non-woven fabric and felt were used for men's, and 1-layer of felt for women's so that an empty space caused by easing contraction can be supplemented.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.1
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• pp.314-319
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• 2010

This paper represents the results of study on Extra High Voltage Power Cable Connection System Development. The purpose is to evaluate structural safety by numerical analysis for the relaxation of electric field concentration and by structural analysis of Carrier Pipe for easy installation of High Insulating Rubber Sleeve in the field, which is core technique of connection system. According to the results, the thickness of Carrier Pipe needs at least 9mm by optimization analysis of deformation behavior and insulating design & relaxation of electric field concentration. The result of contraction behavior of the connection part can be demonstrated with the same result of electric field relaxation analysis at the boundary of the electrode inserted into the insulating rubber sleeve.

• The Journal of the Acoustical Society of Korea
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• v.15 no.1
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• pp.71-80
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• 1996

Characteristics of sleeve-gun arrays installed on the R/V Onnuri were analyzed and compared with survey data. In the case of cluster array, the beam width in the frequency range up to 814Hz is constant as $179.5^{\circ}$, and rapidly narrows in the frequency range of 814-1631Hz. However, in the case of long and wide arrays, as the frequency increases, the beamwidth decreases. The optimal frequency is 69Hz. the main lobe of vertical inclination has its maximum amplitude at phase angle $0^{\circ}$. The optimal frequency of cluster array which produces little side lobe is less than 1631Hz, and those of long and wide arrays are less than 108Hz. As a result, the cluster array produces a good source for high-resolution seismic survey, while the long and wide arrays are suitable for the survey of deep structures. The final high-resolution seismic section with cluster array was compared with that of long and wide arrays.