• Journal of Korean Neurosurgical Society
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• 제56권6호
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• pp.500-503
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• 2014

If a ruptured blood blister-like aneurysm (BBA) arises from the lateral or superolateral wall of the internal carotid artery (ICA) at the level of the anterior choroidal artery (AChA), its proximity to the origin of the AChA presents a serious surgical challenge to preserve the patency of the AChA. Two such rare cases are presented, along with successful surgical techniques, including the application of a C-shaped aneurysm clip parallel to the ICA and a microsuture technique to repair the arterial defect. The patency of the AChA and ICA was successfully preserved without recurrence or rebleeding of the BBA during a 1-year follow-up after the operation.

• ETRI Journal
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• 제28권1호
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• pp.115-118
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• 2006

In this letter, a simple model parameter extraction methodology for an on-chip spiral inductor is proposed based on a wide-band inductor model that incorporates parallel inductance and resistance to model skin and proximity effects, and capacitance to model the decrease in series resistance above the frequency near the peak quality factor. The wide-band inductor model does not require any frequency dependent elements, and model parameters can be extracted directly from the measured data with some curve fitting. The validity of the proposed model and parameter extraction methodology are verified with various size inductors fabricated using $0.18\;{\mu}m$ CMOS technology.

• 치과방사선
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• 제15권1호
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• pp.85-88
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• 1985

The authers observed a multiple miliary osteoma which was found in the 70-year-old male patient at routine dental examination and obtained the following features; 1. The osteomas are situated in the buccal cheeks of both side, but overlying skin shows normal. 2. The small osteomas range from 2.0㎜ to 2.0㎜ in diameter. 3. The osteomas appeared in proximity to the surface at a special radiograph which made with the tube directed parallel to the surface of the face when the cheek is being blown outwardly. 4. Each osteoma appears as a small doughnut shaped shadow with a radiolucent center.

• 한국인터넷방송통신학회논문지
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• 제11권1호
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• pp.41-46
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• 2011

본 논문은 지표면 위에 설치된 전력선과 통신선 사이에 발생하는 상호 인덕턴스에 대하여 분석하였다. 임의 길이의 전력선과, 지표면 위의 터미널 효과를 고려하여 그 특성을 해석하였다. Carson의 해석법을 적용하여 상호 인덕턴스에 대한 해석적 해를 유도하였으며, 수치해석을 통하여 유도한 해의 타당성을 평가하였다. 수치해석 결과, 본 논문에서 유도한 해석적 해는 전력선과 통신선이 서로 기울어지거나 평행하게 놓여 있는 것에 상관없이 타당하였으며, 이전에 발표된 결과들과 비교 검토하였다.

• 한국표면공학회지
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• 제52권5호
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• pp.239-245
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• 2019

To increase the throughput of tip-based nanolithography (TBN), one approach is to use a large array of such tips working in parallel. It is important to maintain co-planarity between the tip array and the writing surface. A slight misalignment can cause large discrepancies of contact force and feature sizes. We report a capacitive proximity sensor built-in with the TBN array for leveling an arrayed polymer pen array. The device allows alignment between an array of writing tips and the writing substrate without contact and contamination. The angular sensitivity of the sensor is $0.05^{\circ}$ for an array with maximum tip-to-tip separation of 100 mm.

• Wind and Structures
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• 제4권6호
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• pp.481-494
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• 2001

Wind tunnel pressure tests were conducted on a 1:100 scale model of a large industrial building with solar panels mounted parallel to the flat roof. The model form was chosen to have the same aspect ratio as the Texas Tech University test building. Pressures were simultaneously measured on the roof, and on the topside and underside of the solar panel, the latter two combining to produce a nett panel pressure. For the configurations tested, varying both the lateral spacing between the panels and the height of the panels above the roof surface had little influence on the measured pressures, except at the leading edge. The orientation of the panels with respect to the wind flow and the proximity of the panels to the leading edge had a greater effect on the measured pressure distributions. The pressure coefficients are compared against the results for the roof with no panels attached. The model results with no panels attached agreed well with full-scale results from the Texas Tech test building.

• 가정과삶의질연구
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• 제20권4호
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• pp.149-164
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• 2002

The purpose of this study was to identify the types of social networks of urban housewives according to different network composition patterns and to analyze the structural and functional characteristics of identified types. The data used in this study were collected from 589 full-time housewives residing in Taejeon city. The major findings are as follows: 1) The social networks of housewives in urban nuclear families were classified into eight types: the kin network, the non-kin network, the kin-centered network, the friend-centered network, the neighbor-centered network, the associate-centered network, the parallel network, and the decentralized network. 2) The structual characteristics (size, density, homogeneity, duration, proximity, frequency, closeness, direction) varied according to the type. The kin network type and the non-kin network type showed extreme degrees in network characteristics. The parallel network type and the decentralized network type showed an average level of network characteristics. The kin-, friend-, neighbor-, and the associate-centered types showed network characteristics of an intermediate level between the single-category types and the decentralized type. 3) The average levels of function of social network types were different in only two(service support, interference) of the six function areas(emotional support, service support, material support, information support, social companionship support, interference). The average level of service support by the non-kin network type was higher than other types. The average level of interference by the kin-centered network type was higher than other types, and that of the neighbor-centered network type was lower than other types. On the other hand, the total amount of function performance of social network types was different in all function areas. The total amount of social support given by the decentralized network type was greater than the other types. The total amount of interference given by the non-kin network type was smaller than the other types.

• 한국초전도ㆍ저온공학회논문지
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• 제18권4호
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• pp.5-8
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• 2016

We report on the fabrication and measurement results of the electrical transport properties of superconductor-normal metal-superconductor (SNS) weak links, made of PbIn superconductor and Au metal. The maximum supercurrent reaches up to ${\sim}6{\mu}A$ at T = 2.3 K and the supercurrent persists even at T = 4.7 K. Magnetic field dependence of the critical current is consistent with a theoretical fit using the narrow junction model. The superconducting quantum interference device (SQUID) was also fabricated using two PbIn-Au-PbIn junctions connected in parallel. Under perpendicular magnetic field, we clearly observed periodic oscillations of dV/dI with a period of magnetic flux quantum threading into the supercurrent loop of the SQUID. Our fabrication methods would provide an easy and simple way to explore the superconducting proximity effects without ultra-low-temperature cryostats.

• 천문학회보
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• 제40권2호
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• pp.36.2-36.2
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• 2015

We report the first detection of linearly polarized emission at an observing wavelength of 350 mum from the radio-loud active galactic nucleus 3C 279. We conducted polarization observations for 3C 279 using the SHARP polarimeter in the Caltech Submillimeter Observatory on 2014 March 13 and 14. For the first time, we detected the linear polarization with the degree of polarization of $13.3%{\pm}3.4%$ (3.9sigma) and the electric vector position angle (EVPA) of $34.^{\circ}7{\pm}5.^{\circ}6$. We also observed 3C 279 simultaneously at 13, 7, and 3.5 mm in dual polarization with the Korean very long baseline interferometry (VLBI) Network on 2014 March 6 (single dish) and imaged in milliarcsecond (mas) scales at 13, 7, 3.5, and 2.3 mm on March 22 (VLBI). We found that the degree of linear polarization increases from 10% to 13% at 13 mm to 350 mum and the EVPAs at all observing frequencies are parallel within < $10^{\circ}$ to the direction of the jet at mas scale, implying that the integrated magnetic fields are perpendicular to the jet in the innermost regions. We also found that the Faraday rotation measures RM are in a range of $-6.5{\times}102{\sim}-2.7{\times}103$ rad m-2 between 13 and 3.5 mm, and are scaled as a function of wavelength:| {RM}| ${\backslash}propto$ {lambda }-2.2. These results indicate that the millimeter and sub-millimeter polarization emission are generated in the compact jet within 1 mas scale and affected by a Faraday screen in or in the close proximity of the jet.

• 한국가스학회지
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• 제5권4호
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• pp.21-26
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• 2001

최근 국내에서는 효율적인 공간활용을 위해 해저터널을 이용하여 전력을 공급하는 것이 시도되고 있으며, 해저터널 내에 에너지 공급 기간시설물(진력케이블, 가스배관, 송유관, 지역난방배관 등)들이 같이 포설될 수 있으면 공사비 절감의 효과는 엄청날 것이므로 관심도가 높아지고 있다. 최근, 국내에서도 해저터널 내에 가스배관과 전력선이 병행 시공되는 경우가 발생하여 가스배관에 대한 안전성에 대한 평가가 요구되고 있다. 따라서 본 논문에서는 해해저터널 내 고전압 전력케이블에 의한 가스배관의 교류부식, 가스배관의 코팅과 용융. 절연 플랜지, 전기방식용 정류기 등의 전기방식설비의 안정성에 대하여 검토함으로써, 최종적으로 가스배관의 안전성을 평가$\cdot$연구하였다.