• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2004년도 추계학술대회 논문집
• /
• pp.369-372
• /
• 2004

Photo-induced surface alignment is charming as a non-contact photo-patternable alignment technology which can be used in the next generation of displays, such as large area, multi-domain. For decades, many polymer film have been investigated and developed to be used in the photo alignment. Among these photoreactive materials, recently developed polyimide, Chloromethylated Polyimide(CMPI) now became the focus of interests in this area because of its high photosensitivity and superior thermal stability. In this report, we present micro patterning method to form the nanoscale structure by Mask-Less laser patterning using this CMPI film and NSOM probe.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
• /
• pp.410-411
• /
• 2006

High throughput analysis using a DNA chip microarray is powerful tool in the post genome era. Less labor-intensive and lower cost-performance is required. Thus, this paper aims to develop the multi-channel type label-free DNA chip and detect SNP (Single nucleotide polymorphisms). At first, we fabricated a high integrated type DNA chip array by lithography technology. Various probe DNAs were immobilized on the microelectrode array. We succeeded to discriminate of DNA hybridization between target DNA and mismatched DNA on microarray after immobilization of a various probe DNA and hybridization of label-free target DNA on. the electrodes simultaneously. This method is based on redox of an electrochemical ligand.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
• /
• pp.845-848
• /
• 2004

High throughput analysis using a DNA chip microarray is powerful tool in the post genome era. Less labor-intensive and lower cost-performance is required. Thus, this paper aims to develop the multi-channel type label-free DNA chip and detect SNP (Single nucleotide polymorphisms). At first, we fabricated a high integrated type DNA chip array by lithography technology. Various probe DNAs were immobilized on the microelectrode array. We succeeded to discriminate of DNA hybridization between target DNA and mismatched DNA on microarray after immobilization of a various probe DNA and hybridization of label-free target DNA on the electrodes simultaneously. This method is based on redox of an electrochemical ligand.

• 한국신뢰성학회지:신뢰성응용연구
• /
• 제8권4호
• /
• pp.155-166
• /
• 2008

PTH cracks are caused by the mismatch of coefficient of thermal expansion(CTE) between polymer and laminated materials, and are one of the main failure mechanisms of multi layer boards. In spite of its importance, it is usually hard to measure or detect them because of its small size and invisibility. To detect PTH cracks more effectively, this paper proposes a theoretical model that can estimate the resistance value from crack size of PTHs. Using four-point probe resistance measurement method, the resistance value of test coupons is measured. Through measured data, we verify the validity of the proposed theoretical model and set up criteria of failure.

• 한국음향학회지
• /
• 제43권2호
• /
• pp.184-199
• /
• 2024

잔여의 채널 간 간섭은 일반적인 시역전 처리 기반의 동시 다중 집속에서의 주요 문제점으로 고려되어진다. 본 논문에서는, 다수의 음원이 존재하는 수중 도파관환경에서의 채널 간 간섭을 완화하기 위해 그람-슈미트 과정을 시역전 처리에 적용하였다. 해상 실험 데이터 기반 수치 시뮬레이션을 통해 여러 위치로의 널 형성 및 서로 다른 음원의 위치에서의 각기 다른 신호의 왜곡 없는 동시 다중 집속이 가능함을 능동 시역전 처리 관점에서 검증하였다. 또한, 적응 시역전 처리 방법에 비해 수신기 개수의 감소에 상대적으로 적은 영향을 받는 것을 확인하였다. 제안된 알고리즘을 통해 수동 다중 입·출력 수중 통신에서의 채널 간 간섭이 효율적으로 제거됨을 해상 실험 데이터를 통해 보였다.

• 한국음향학회지
• /
• 제38권4호
• /
• pp.443-449
• /
• 2019

심혈관계 질환 환자가 발생 하였을 때, 환자의 뇌와 내부 장기를 보호하고 생존율을 높이기 위해서는 사건발생 이후 신속하게 응급 의료 서비스를 제공하여 경과 시간을 줄이는 것이 가장 중요하다. 뿐만 아니라 심폐소생술의 실시를 위한 판단은 경동맥의 맥을 직접 짚는 '경동맥 촉진법'은 실시자의 주관적인 판단과 약해진 심혈관 기능에 따른 뇌혈류 차단을 할 수 있다. 본 연구는 개발된 다중 초음파 도플러 채널 쌍과 산소포화도 측정 모듈이 결합된 패치형 프로브를 이용하여 경동맥의 혈류 속도, 맥박, 산소포화도를 생체 내 실험을 통해 정성적으로 측정하였다. 따라서 본 시스템은 응급 상황에서 정량적이고 신속하게 환자의 심폐 기능을 모니터링 하여 심폐소생술 판단 여부를 객관적으로 제공하여 응급 상황 시 심혈관계 질환 환자의 생존률을 높일 수 있는 차세대 진단 기기로 활용 될 수 있다.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2012년도 제42회 동계 정기 학술대회 초록집
• /
• pp.508-508
• /
• 2012

CST microwave studio is used to simulate the plasma profile of the 450mm CCP source. Standing wave effect becomes important at the high frequency as the electrode radius increases. To solve plasma non-uniformity problem, we designed multi electrode chamber to decreasing standing wave effect. Simulation showed the ratio of input power of each electrode is related with electric field strength. The multi electrode was constructed and measured by 2D probe arrays using floating harmonic method. Uniformity of 450 mm CCP was changed by the ratio of input power of each electrode. We described this dependence with circuit model.

• 대한전기학회논문지:전기물성ㆍ응용부문C
• /
• 제49권11호
• /
• pp.589-595
• /
• 2000

In this papre, AC losses of Bi-2223 tapes with different twist pitch of superconducting core were fabricated, measured and analyzed. These samples produced by a powder-in-tube method are multi-filamentary tape with Ag matrix. Also, it's produced by non-twist and different twist pitch(8, 10, 13, 30, 50, 70 mn). The critical current measurement was carried out under the environment in Liquid nitrogen and in zero field by 4-probe method. And the AC loss measurement was carried out under the environment of applied time-varying transport current by transport method. From experiment, the critical current is larger non-twist than twisted filament. And, the AC loss by Norris equation is higher non-twisted tape than 13mm twisted tape. Also, it is confirmed that of AC loss of tape having non-twist pitch larger than those having differnet twist pitch.

• 융합신호처리학회논문지
• /
• 제16권4호
• /
• pp.156-161
• /
• 2015

본 논문에서는 GPS(Global positioning System)-Bluetooth-DSRC(Dedicated short range communication) 대역의 신호를 동시에 수신할 수 있는 차량용 이중편파 다중대역 안테나를 적층형으로 설계하였다. 안테나는 다층 구조(Multi-Layer)이고, 유전율이 4.4이고, 두께가 1.6mm 인 FR4-epoxy 기판을 사용하였다. GPS와 DSRC 대역은 원형편파(Circular Polarization) 특성을 가지고, 블루투스 대역은 선형편파(Linear Polarization) 특성을 가지며, 이들 안테나는 단일 프루브 급전하였다. 안테나는 Ansys HFSS v11로 시뮬레이션 하였고, 측정결과와 비교하면서 크기가 $67mm{\times}67mm{\times}4.8mm$인 안테나를 설계하였다. 최적 설계된 안테나는 -10dB 대역폭이 각 대역에서 82MHz, 127MHz, 862MHz로 측정되었고, GPS 및 DSRC 대역의 3dB 축비 대역폭은 12MHz와 112MHz로 시뮬레이션 되었다. 이 결과는 시스템이 요구하는 사양을 만족하고 있음을 확인하였다.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 1998년도 춘계학술발표회논문집(2)
• /
• pp.216-221
• /
• 1998

A study on induction plasma deposition with ceramic materials, yttria-stabilized-zirconia ZrO$_2$-Y$_2$O$_3$ (m.p 264O $^{\circ}C$), was conducted with a view developing a new method for nuclear fuel fabrication Before making dense pellets more than 96％TD., the spraying condition was optimized through the process parameters, such as chamber pressure, plasma plate power powder spraying distance, sheath gas composition, probe position, particle size and powders different morphology. The results with a 5mm thick deposit on rectangular planar graphite substrates showed a 97.11％ theoretical density when the sheath gas flow rate was Ar/H$_2$120/20 l/min, probe position 8cm, particle size -75 ${\mu}{\textrm}{m}$ and spraying distance 22cm by AMDRY146 powder. The degree of influence of the main effects on density were powder morphology. particle size, sheath gas composition, plate power and spraying distance, in that order. Among the two parameter interactions, the sheath gas composition and chamber pressure affects density greatly. By using the multi-pellets mold wheel type, the pellet density did not exceed 94%T.D., owing to the spraying angle.