• Proceedings of the KAIS Fall Conference
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• 2008.05a
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• pp.115-117
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• 2008

본 논문에서는 Dual Band Microstrip Patch 안테나를 제작하였다. 성능 측정을 위해서 슬릿의 위치에 따른 특성을 Ansoft사의 HFSS를 이용하여 시뮬레이션하였고, 이를 바탕으로 GSM과 DCS 주파수 대역을 동시에 만족 시키는 원형 패치 안테나를 인셋(inset) 급전 방식을 이용하여 원하는 중심 주파수에서 공진이 일어나도록 설계 하였다. 그 결과 슬릿과 패치의 간격이 0.5mm, 슬릿의 폭은 1mm, 각도는 $98^{\circ}$일 때 가장 좋은 특성과 각각의 중심주파수에서 $S_{11}$이 -6.85dB, -9.691dB인 결과를 얻을 수 있었다.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.2
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• pp.249-254
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• 2014

We have studied on the possibility of railway stability system using RFID tag. UHF RFID tag was desinged, manufactured and tested. Proposed UHF tag antenna has PIFA type structure and inset feed multi matching technique was attempted for impedance matching of antenna. The impedance bandwidth (VSWR < 3) of the proposed tag antenna covers 917~923 MHz. Measured peak gain is 3.225 dBi and UHF band with an omni-directional radiation pattern. RFID reader and tag installed in motor car and track, respectively. Then, tag recognition rate according to velocity of car (under 45 km/h) represented 100 %.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.824-827
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• 2010

본 논문은 전동형 모터의 Rotor의 자동 성형을 위한 자동화된 주조기 개발에 대한 결과이다. 개발된 자동화된 Rotor 전용 주조기는 수평형에 비해 금형의 크기가 약 1/2정도 이므로 금형 체결력이 반감되고, 기계 구조는 매우 작아진다. 그리고 Al용탕이 사출되는 과정에서 Spool -> Runner -> Gate -> Cavity(제품)에 이르기까지의 Runner를 최소화하여 재용융을 위한 에너지의 비용 절감을 할 수가 있다. 금형 구조가 간단하므로 금형비가 저렴하여 다품종 소량생산에 매우 유리하다. 개발제품은 수직형 구조로 알루미늄 용탕의 윗면의 공기가 금형의 유로 상측에 위치하므로 공기(gas)가 먼저 배출되어 사출(주조)후 Rotor 성형부에 남아 있는 기포가 최소화된다. 그러므로 충진도가 높아진다. Rotor 코아(규소강)가 크더라도 수직형은 금형내에 삽입(Inset)하기가 쉽고 또한, 제품의 착탈 부위와 사출부위가 다르기 때문에 작업성, 안전성이 우수하고 생산성이 매우 높다. 수직형은 충진 밀도가 매우 높고 밀도가 균일하기 때문 Rotor의 회전 소음, 진동에 대한 품질이 매우 우수하다. 따라서 고효율, 고품질의 전동모터 Rotor 제품 생산에 매우 효과적인 장비라 할 수 있다.

• Archives of Plastic Surgery
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• v.44 no.5
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• pp.449-452
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• 2017

The nipple-sharing technique for nipple reconstruction offers excellent tissue matching. The method used for nipple graft harvesting determines the quality of the graft and hence, the success of nipple sharing. Here, we described a guillotine technique wherein the nipple is first transfixed with 2 straight needles to stabilise it. Two No. 11 blades are then inserted in the center and simultaneously swept outwards to amputate the distal portion of the nipple. This technique provides good control, resulting in a very evenly cut base. The recipient bed is deepithelialized thinly, and the nipple graft is inset with interrupted 8-0 nylon sutures under magnification. Being a composite graft, it is protected with splint dressings for 6 weeks, and the dressing is regularly changed by the surgeon. The height of the nipple grafts ranges from 4 to 8 mm. This technique was performed in 9 patients with an average follow-up of 2.9 years (range, 1-4.5 years). Apposition between the nipple graft and its bed is crucial for the success of this technique. When correctly applied, we observed rapid revascularization of the graft.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.418-421
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• 2007

In this paper, we proposed a hierarchical nearest-neighbor searching method for deciding fitness of a clustered segment. It is difficult to distinguish the difference between correct spots and atypical noisy spots in footprint patterns. Therefore we could not completely remove unsuitable noisy spots from binarized image in image preprocessing stage or clustering stage. As a preprocessing stage for recognition of insect footprints, this method decides whether a segment is suitable or not, using degree of clustered segment fitness, and then unsuitable segments are eliminated from patterns. Removing unsuitable segments can improve performance of feature extraction for recognition of inset footprints.

• Journal of the Society of Naval Architects of Korea
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• v.30 no.1
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• pp.30-44
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• 1993

This paper deals with both experimental and theoretical methods for performance prediction of asymmetric stater propulsion systems which have been used for the purpose of recovery of a propeller slipstream rotational energy due to a stator located in front of the propeller. Using the developed computer code based on the lifting surface theory, theortical investigation on the interaction between the stator and the propeller is provided in order to obtain general insight on the performance characteristics of the propulsion systems in uniform and non-uniform flow. Such theoretical calculations have end agreements with model Inset results. The asymmetric stator would give an efficiency gain of about 6% to the compound propulsor system compared with the single propeller system.

• Journal of Welding and Joining
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• v.9 no.4
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• pp.28-39
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• 1991

The change of microstructure in the bonded interlayer and mechanical properties of the joints were investigated during Transient Liquid Phase Diffusion Bonding(TLP bonding) of STS304/SM17C and STS304/SM45C couples using Ni base amorphous alloys added boron and prepared alloy as insert metal. Main experimental results obtained in this study are as follows: 1) Isothermal solidification process was completed much faster than theoretically expected time, 14ks at 1473K temperature. Its completion times were 3.6ks at 1423K, 2.5ks at 1473K and 1.6ks at 1523K respectively. 2) As the concentration of boron in the insert metal increased, the more borides were precipitated near bonded interlayer and grain boundary of STS304 side during isothermal solidification process, its products were $M_{23}P(C,B)_6}_3)$ The formation of grain boundary during isothermal solidification process was completed at structural carbon steel after starting the solidfication at STS304 stainless steel. 4) The highest value of hardness was obtained at bonded interface of STS304 side. The desirable tensile properties were obtained from STS304/SM17C, STS304/SM45C using MBF50 and experimentally prepared insert metal with low boron concentration.

• Journal of Korea Society of Industrial Information Systems
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• v.6 no.2
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• pp.7-15
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• 2001

In this paper, we suggest the algorithm that inserts or deletes documents into web sites without creating tag. This algorithm uses tag which links between documents to automatically inset or delete the web documents. This study extracts the texts in the ... tag of the document to put into the structure as a type of graph creating the link as a node m of sub-node. That is, in this case of configurating new link between web documents, this algorithm allows to insert or delete the node to or from the graph without creating the tag. In the case of deleting the document, it removes the broken link connecting the sub-nodes of deleted node newly to its parent node.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.13 no.1
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• pp.19-25
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• 2002

This paper presents novel architectures for power amplifier (PA) relying on 3rd harmonic-tuning technique and dual feeding antenna structure for the isolation of the Tx and the Rx ports. Active integrated antenna (AIA) with power amplifier makes the problem of the isolation between the Tx and the Rx ports occur So, this paper suggests dual feeding and dual resonant structures of the AIA with PA are possible to obtain the high isolation between the Tx and the Rx signals. Dual resonant triangular microstrip antenna, which can replace power amplifier tuning circuit, with slots-loaded and characteristic of the isolation between the Tx and the Rx ports using inset microstrip line feeding and probe feeding methods is proposed and experimentally studied for the case of thin substrate.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.8
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• pp.1796-1803
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• 2013

In this paper, a novel particle swarm optimization method based on IE3D is used to design a mobile communication microstrip patch antenna. The aim of the paper is to design and fabricate an inset fed rectangular microstrip antenna and study the effect of antenna dimensions length (L), width (W) and substrate parameters relative dielectric constant (${\varepsilon}r$), substrate thickness on radiation parameters of band width. PSO algorism was applied to IE3D, low resistance against, band width and advantage, were improved.