표면 미세 가공 기술로 제작된 Piezoresistive 마이크로 외팔보를 이용한 바이오 센서의 제작 및 특성

나광호,이남주,김용상,강치중 명지대학교 자연과학연구소 2004 자연과학논문집 Vol.23 No.-

제작이 간단하며 비용이 저렴한 표면 미세 가공 기술을 이용하여 바이오 센서로 이용 될 piezoresistive 마이크로 외팔보를 제작하였다. 바이오 센서의 특성을 평가하기 위해서 마이크로 외팔보 한쪽면에 중착된 금박막에 금 분자와 공유결합을 하는 thiol기를 포함한 cystamine과 cystamine의 amine기와 공유결합을 하는 aldehyde기를 포함한 glutaraldehyde를 연속적으로 흘려주었다. 반응 후의 마이크로 외팔보의 휘어짐은 잘 알려진 광학적 측정 방식과 직접적인 전기적 검출이 가능한 piezoresistive 측정 방식을 사용하여 실시간으로 측정하였다. A microcantilever-based biosensor with piezoresistor has been fabricated using surface micromachining technique, which is cost effective and simplifies a fabrication procedure. To evaluate the characteristics of the cantilever, the cystamine terminated with thiol was covalently immobilized on the gold-coated side of the cantilever and glutaraldehyde that would be bonded with amine group in the cystamine was injected subsequently. This process was characterized by measuring the deflection of the cantilever in real time monitoring. Using a piezoresistive read-out and a well-known optical beam deflection method as well carried out the measurement of deflection.

급성 운동 신경 축삭성 신경병증과 동반된 기관지내 이물 1예

조영신,전웅,이호성,최재성,나주옥,서기현,김용훈 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.1

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靑色 사파이어의 熱處理와 分光學的 特性

나경주,김원사,김문영,배인국,장영남 충남대학교 기초과학연구소 1994 연구논문집 Vol.14 No.-

For the blue sapphires from Santung, China, the color change before and after has been investigated by UV-Visible spectrophotometry method. The blue sapphires from Shantung show four groups of absorption bands: the bands A (374, 386 and 450 ㎚) being attributed to single Fe^3+ ion, the band B (560, 579 and 704 ㎚) to Fe^2+/Ti^4+ pairs, the band C (∼800 ㎚) to Fe^2+/Fe^3+ pairs, and the D (528 ㎚) to Ti^3+ dd transitions. From those UV-VIS characteristics the origin of blue color of the sapphires is confirmed to be attributed by the factors such as Fe^2+/Fe^3+ and Ti^3+/Ti^4+. The absorption spectra of natural blue sapphires before and after heat treatment show distintive features, comparing with those of sapphires from other localities: the bands of 689 ㎚ and of Cr^3+ are not recorded on the spectra of sapphires from Shantung. The band (492 ㎚), which resulted from Ti^3+, is not shown and the intensity of the band 528 ㎚ decreases after the heat treatment. Decoloration of ink-blue sapphires are found to be successful by heat treatment with the control of annealing and atmosphere. During the diffusion process the excess components of impurities contained originally in the host crystal were expelled to the surface of crystals, enhancing the transparency of the crystals noticeably.

V1과 V2 피부분절에 국한된 감각저하를 보인 다리뇌출혈

나주영,김명국,유봉구 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2

Pontine tegmental hemorrhage involving the trigeminal tract, the medial lemniscus, and the spinothalamic tract frequently give rise to various sensory dysfunctions. However, isolated hypesthesia confined to certain parts of trigeminal sensory dermatomes is very rare. We experienced a case of impairment of pain and temperature sense over the unilateral ophthalmic (V1) and maxillary (V2) nerve distribution. Brain CT and gradient echo MRI showed a small hemorrhage in the right dorsomedial midpons. The segmental sensory impairment may explain by somatotopic representation of trigeminal nucleus and tract in the ventral to dorsal and cranio-caudal direction

4사이클 가솔린 機關의 熱精算에 관한 硏究

나찬주,윤영환,윤건식 國立 昌原大學校 産業技術硏究所 1994 産技硏論文集 Vol.8 No.-

The performance tests for an 87 PS 4-cylinder 4-cycle gasoline engine were carried out in order to measure the heat balances in various operating conditions. The experimental apparatus is equiped with 130kW eddy current dynamometer. In the heat balance diagram of the engine, mechanical losses could be quite accurately estimated by substracting shaft power from indicated power of the engine since the indicated power was obtained from indicator diagram by a piezo-electric pressure sensor located at the cylinder head and the shaft power was measured by the eddy current dynamometer. The typical results obtained in this study can be summarized as follows. First, The best engine performance shows around 2000 rpm of the engine speed in most running conditions. Second, The heat transfer rate to cooling water and to exhaust gas as well as output and frictional works change considerably with the engine speed and boost pressure. However, the extra losses(those are, heat transfers to oil, air, ete.) do not change much with respect to them. Third, The rate of mechanical loss increases as engine speed increases, but, at the same engine speed, the rate of mechanical loss does not change much as boost pressure varies.

쌍직교 웨이블릿 변환을 이용한 계층적 워터마킹

이나영,고일주,김원,김계영 崇實大學校 生産技術硏究所 2002 論文集 Vol.32 No.-

In this paper, we propose a watermarking technique using biorthogonal wavelet transform and hierarchical correlation. The proposed technique inserts a watermark at high frequency domain and improves the computational time for extracting the watermark using hierarchical correlation. In the experiment, we show the performance of the proposed technique and use bar code as watermark to automatically manage the watermarked images.

해운대 달맞이 언덕에 있어서 바다조망경관의 역사적 변천에 관한 연구

강영조,신수안,조미나,이현주,박은희 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1

The purpose of this study is to clarify the historic transition of the prospects on Haeundae dalmaji hill. Dalmaji hill is well known for a character of configuration on the ground with the scene of the sea. We will infer that how did it change the prospects of Dalmaji hill's sea through the analyzing of the preset situation and location of building on the hill. (1) We investigated the stories of the building, the history, the business condition. (2) We collect the twenty four view points which is able to have seascape on the hill, being easily approaching to the road, and condition of changing the building. (3) We clarified the transition of seascape prospect and considered the characteristics of the six types from which were divided the condition of seascape prospect.

치주병원균에 대한 유산균의 억제효과

정하나,김영준,정현주,오종석 전남대학교 치과대학 1999 전남치대논문집 Vol.11 No.1

This study was performed to evaluate the effect of hydrogen peroxide-producing Lactobacillus acidophilus V-20 on the replication of periodontal pathogens, Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis. When A. actinomycetemcomitans and P. gingivalis were incubated alone and in the combination with L. acidophilus V-20, the viable cell numbers of A. actinomycetemcomitans and P.gingivalis were compared between those cultures. The effect of S. mutans, E. durans, and L. lactis on the replication of A. actinomycetemcomitans and P. gingivalis was also evaluated. The change of periodontal indexes(probine depth, gingival index, GCF volume) and the viable cell numbers of A. actinomycetemcomitans and black pigmented bacteroides in subgingival plaque sample were evaluated following gargling of fermented milk made from L.acidophilus V-20 for 1 month on patients with periodontal disease in maintenance phase. In the mixed culture of L. acidophilus V-20 and A. actinomycetemcomitans or P. gingivalis, the replication of A. actinomycetemcomitans or P. gingivalis was completely inhibited. But in the mixed culture of P. gingivalis and hydrogen peroxide-nonproducing Lactobacillus casei, the viable cell numbers of P. gingivalis was not decreased when compared with the numbers in the mixed culture of P. gingivalis and L. acidophilus V-20. In the mixed culture of A. actinomycetemcomitans and S. mutans, E. durans, or L. lactis, the viable cell number of A. actinomycetemcomitans was not almost changed when compared with the numbers in the culture of A. actinomycetemcomitans alone. And in the mixed culture of P. gingivalis and E. durans or L. lactis, the viable cell numbers of P. gingivalis was not almost changed compared with the counts in the culture of P. gingivalis alone. But the replication of P. gingivalis was completely inhibited in the mixed culture of P. gingivalis and S. mutans. When the change of periodontal indexes following gargling of fermented milk was compared with baseline, probing depth and gingival index were not changed, but GCF volume was significantly decreased(p<0.05). And when the viable cell numbers of microorganisms in subgingival plaque sample were compared with baseline, total viable cell number was almost unchanged and the viable cell numbers of A. actinomycetemcomitans and black pigmented bacteroides were significantly decreased(p<0.05). These results suggest that L. acidophilus V-20 inhibit the replication of A. actinomycetemcomitans and black pigmented bacteroides by the formation of hydrogen peroxide.

초등학교 고학년 학생의 전두엽연합령 기능에 따른 보존논리 형성 정도

김영신,나은미,권용주,정완호 한국교원대학교 과학교육연구소 2001 청람과학교육연구논총 Vol.11 No.1

The purpose of this study is to investigate the functions of prefrontal lobe on the formation of conservation scheme of elementary students. In this study, 107 students of 4th to 6th grades were selected from the elementary school in Seoul area. As to the research, 4 items for conservation logic test from GALT test sheet were used. The planning ability, inhibiting ability and reasoning ability were measured for the prefrontal lobe functions. About 30% of 4-6 grade students did not have volume conservation logic skills. The formation of conservations was not linear. Inhibiting ability was significantly different in level of conservation. And, conservation logic skills were significantly correlated with cognitive variables. Reasoning ability was significantly explained about 10% of the conservation logic in 4-6 grades.

토지이용패턴에 따른 하천수질과 식생분포

오영주,강병화,김병우,김성필,한민수,김진호,나영은 한국환경농학회 2006 한국환경농학회지 Vol.25 No.1