• 한국정밀공학회지
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• 제21권6호
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• pp.131-138
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• 2004

The objective of this paper is to decide optimal location of a pin-hole to minimize stress concentration around the hole in a rotating disc. The focus of this investigation is to evaluate the effect of pin-hole on stress distribution around the hole using optimum design technique and finite element analysis. Design variables are the radial and the angular location of pin-hole from center of the hole and objective function is the maximum stress around hole in a rotating disc. Using first order method of optimization technique, we found that the maximum equivalent stress around the hole with optimized pin-hole could be reduced by 15.1% compared to that without pin-hole.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2010년도 추계학술발표대회
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• pp.1138-1141
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• 2010

모바일 기기나 ATM에서의 사용자 인증에는 PIN(Personal Identification Number)이 주로 사용된다. 그 이유는, PIN은 사용자가 외우기 쉽고 단순한 UI(User Interface)로 구현이 가능하다는 장점이 있기 때문이다. 하지만 PIN은 어깨너머 공격에 취약하다는 단점이 있다. 기존의 연구들은 이미지 기반, 인식 기반, PIN과 이미지의 혼합방식을 이용한 다양한 사용자 인증 방법들을 제안하였다. 하지만 이들 연구는 모바일의 작은 화면을 고려하지 않아 구현이 어렵거나, 어깨너머 공격에 취약하거나, 사용자에게 기억에 대한 부담을 증가시키는 등의 문제점이 있다. 본 논문에서는 PIN과 패턴 이미지를 결합하여 모바일 기기에 적합하면서, 어깨너머 공격에 대해 기존의 방법들에 비해 안전하고 사용자가 외워야 하는 기호(숫자, 이미지 등)가 적은 사용자 인증 방법을 제안한다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1319-1322
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• 2007

Planar PIN photodiode is compatible with LTPS process, and its fabrication requires no additional manufacturing process. In this study we design the optimum dimension of PIN diodes with two nitride layers to improve the efficiency of PIN diodes. The PIN photo sensor shows very good sensitivity to ambient light illuminance.

• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2002년도 종합학술발표회 논문집 Vol.12 No.1
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• pp.39-43
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• 2002

In this thesis, a λ/4 hair-pin resonator is proposed to reduce the size of resonators. A LTCC MLC bandpass filter is designed using the λ/4 hair-pin resonators. The electromagnetic coupling structure between two planar resonators is analysed. The equivalent circuit is derived to explain the behavior of the LTCC MLC bandpass filter using λ/4 hair-pin resonators. A design procedure is also described. The simulated and measured results of 2-pole bandpass filter are presented.

• 프린팅코리아
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• 통권24호
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• pp.98-103
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• 2004

아직은 섣부른 전망일 수도 있지만 인쇄관련 업체들이 밀집돼 있는 을지로, 충무로 일대에 인쇄관련 업계를 위한 정보통신망(전용망) 개설 움직임이 일면서 파일 등 전송분야에 일대 혁신이 일어날 것으로 보인다. 'PIN프로젝트'로 명명된 이번 인쇄 전용망 개설 사업에 대해 혹자는 가히 혁명적 이라는 표현을 서슴지 않고 있을 정도이다. 이에 본지에서는 이번 PIN(Publishing Information Network)프로젝트가 어떤 과정을 거쳐 어떻게 서비스되는 것인지 그리고 이 PIN프로젝트가 미칠 영향은 무엇인지에 대해 알아보았다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.2408-2413
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• 2007

Since the heat generation in a chip increases as the components are miniaturized and the computing speed becomes faster, suitable heat dissipation has become one of the primary limiting factors to ensure the reliable operation of the electronic devices. A pin-fin array could be used as an alterative cooling system of the electronic equipment. In this study, convective heat transfer through the pin-fin array is analyzed experimentally based on porous medium approach. The influence of the structure of the pin-fin array including the pin-fin spacing, the pin diameter and plate length on heat transfer characteristics is investigated and compared with the previous analytical results and existing correlation equations. Nowadays, electronic and mechanical devices become smaller and smaller. In this sense, the main purpose of this study is to decide the optimum pin-fin arrangement to get similar heat transfer performance when the length of the existing cooling system is reduced as a half.

• 소성∙가공
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• 제26권2호
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• pp.95-100
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• 2017

In this study, the method of process design for side forming of a tooth part used for a component of automobile transmission was suggested using FE-simulations. To develop the side forming for the tooth part, in this paper, the shape factors of B.T.Pin was considered as design parameters. The shape factors of B.T.Pin were selected to be the round of pin, reinforced angle and reinforced length. Based on FE simulation results, appropriate shape factor without causing any defects was selected. In addition, to increase the strength of pin, the combination of shape factor having minimum stress after side forming was selected using FE-simulation. In addition, with design of a die set, cold side forming of the tooth part was experimented to estimate effectiveness of the designed B.T.Pin. From experiments, it was found that the tooth part with complete formation of the tooth was obtained without making any forming defects and punch fracture.

• 한국산학기술학회논문지
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• 제12권5호
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• pp.2272-2278
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• 2011

광통신 시스템에서 신호와 부가적인 잡음의 통계적인 특성에 대해 다양한 방법으로 평가하는 것은 시스템의 성능 최적화를 위해 필수적인데, 본 연구에서는 수신기의 성능 평가 방법으로 다양한 에러 확률을 대역폭과 비트수의 함수(m)로 표현하여 수신기의 성능을 평가를 통하여 광통신시스템에서 사용되고 있는 PIN 수신기의 수신감도를 해석하였고 시뮬레이션을 통해 이를 확인하였다. 그 결과 m=20인 경우, PIN 수신기의 수신 감도는 주어진 에러 확률을 유지하기 위해 대략 $9.2{\times}10^4$ 광자/비트 정도가 필요함을 확인 할 수 있었다.

• Tribology and Lubricants
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• 제24권4호
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• pp.196-204
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• 2008

In this study, the pressure distributions on the oil film of piston pin bearings are found by two-dimensional lubrication analysis in order to help the optimum design of the bearings of piston pin. The lubrication analysis is carried out together with an equation related with the oil pressure-viscosity index. The oil film pressure distribution is used as an input data for pressure boundary conditions at the piston pin-boss surface. Finally, the piston pin-boss stress distribution coupled with the thermal stress is calculated, and then compared with the results of the stress analysis which is not counted with the oil film pressure boundary condition.

• 한국전기전자재료학회논문지
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• 제21권10호
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• pp.889-895
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• 2008

This paper presents a comprehensive mathematical analysis and simulation of trench IGBT with the help of PIN-PNP combinational model. Since trench IGBT is characteristically influenced by PIN diode, it may be almost impossible to analyze the trench IGBT using PNP-MOS modeling methods, even PIN-MOS techniques which neglect the hole current components coming into p-base region. A new PIN-PNP complementary cooperational model is developed in order to make up the drawbacks of existing models. It would allow us to make qualitative analysis as well as simulation about switching and on-state characteristics of 1,700 V trench IGBT. Moreover, if we improve the PIN diode effects through the optimization of trench structure, trench IGBT is expected to be one of the most promising devices in the not only high-voltage but also high speed switching device field.