• Journal of the Korean Chemical Society
• /
• v.38 no.8
• /
• pp.552-561
• /
• 1994

The cis → trans thermal isomerization of azobenzene derivatives has been studied. A sizable solvent effect on the rates for thermal isomerization of push-pull azobenzenes are observed. It is suggested that the isomerization proceeds via a rotational mechanism. For non push-pull azobenzenes, the lack of solvent effects on the rate of isomerization was observed. This suggests that the isomerization proceeds via an inversional mechanism for non push-pull azobenzenes.

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2016.10a
• /
• pp.337-338
• /
• 2016

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.9 no.1
• /
• pp.165-169
• /
• 2008

The effect of processing conditions on the morphology of polyphenyleneoxide (PPO)/polyamide 6 (PA 6) blends were investigated. Injection molded part with a $15cm{\times}15cm{\times}3.2mm$ sized plate was molded with various injection molding conditions, and the morphology of the injection molded blends was investigation by using SEM. As a result, we found that molded part shows very complicated morphology because it has experienced complex thermal, shear and elongation history during the processing.

• Proceedings of the Materials Research Society of Korea Conference
• /
• 2011.05a
• /
• pp.28.1-28.1
• /
• 2011

비휘발성 저항 메모리소자인 ReRAM은 간단한 소자구조와 빠른 동작특성을 나타내며 고집적화에 유리하기 때문에 차세대 메모리소자로써 각광받고 있다. 현재, 이성분계 산화물, 페로브스카이트 산화물, 고체 전해질 물질, 유기재료 등을 응용한 저항메모리소자 응용에 대한 연구가 활발히 진행되고 있다. 그 중 ZnO 박막은 이성분계 산화물로써 조성비가 간단하고, 빠른 동작특성을 나타내며, 높은 저항 변화율을 보이기 때문에 ReRAM에 응용 가능한 재료로써 기대되고 있다. 또한 가시광선 영역에서 광학적으로 투명한 특성을 보이기 때문에 투명소자 응용에도 많은 연구가 진행되고 있다. 본 연구에서는 Metal/Insulator/Metal (Al/ZnO/Al) 구조의 소자를 제작하여 저항 메모리 특성을 평가하였다. Radio frequency (RF) sputter를 이용하여 ZnO 박막을 합성하고 박막의 결정성을 평가하였으며, resistive switching 효과를 관찰하였다. 합성된 박막 내부의 결정성은 메모리 구동 저항에 영향을 주며, 이를 제어하여 신뢰성있는 메모리 효과를 얻을 수 있었다. 특히 박막의 두께를 제어함으로써 구동전압의 변화를 관찰하였으며 소자에 적합한 두께를 평가할 수 있었다. 또한, ZnO 박막 내의 결함에 따른 on/off 저항의 변화를 관찰할 수 있었다. 제작된 저항 메모리소자는 unipolar 특성을 보였으며, 높은 on/off 저항의 차이를 유지하였다. Scanning electron microscope(SEM)을 통해 합성된 박막의 형태를 평가하였고, X-ray diffraction (XRD) 및 transmission electron microscopy (TEM)을 통해 결정성을 평가하였으며, photoluminescence (PL) spectra 분석을 통하여 박막 내부의 결함 정도를 평가하였다. 제작된 소자의 전기적 특성은 HP-4145를 이용하여 측정하고 비교 분석하였다.

• 대한핵의학회:학술대회논문집
• /
• 1981.05a
• /
• pp.117.3-118
• /
• 1981

• Journal of The Korean Radiological Technologist Association
• /
• v.29 no.1
• /
• pp.94-94
• /
• 2003

• Journal of Korean Philosophical Society
• /
• v.143
• /
• pp.267-290
• /
• 2017

At the end of the 'observing reason' of the chapter of 'the Reason' in Hegel's PhdG, reads that 'Spirit is a bone' and it is an 'infinite judgement'. We will concentrate on the following problems to clarify the meaning of this infinite judgement. First, this paper introduces the various interpretations on the meaning of the 'Spirit is a bone' and makes a comparative investigation of that problem. If we do not examine the various interpretations, there may be the probability of arbitrary interpretation of this judgement. Second, we will discern the difference between Kant's and Hegel's interpretations with regard to the meaning of the infinite judgement. Hegel obviously understands the content more than the meaning of Kant's forms of infinite judgement (S is not-P). If we do not explicate the reason which Hegel expands beyond the form to the content, it is difficult to understand the meaning which Hegel has said on it. With regard to this, we do not restrict our study to the PhdG. We also refer to the meaning of the infinite judgement on 'the judgement of Dasein' in Hegel's small and large Logics. Third, We are going to explore the various interpretations concerning those problems. Above all, we note ${\check{Z}}i{\check{z}}ek^{\prime}s$ interpretation who relates it to Psychoanalysis. While examining ${\check{Z}}i{\check{z}}ek^{\prime}s$ interpretation, we expecially note how he can interpret it well.

• Journal of the KSME
• /
• v.52 no.11
• /
• pp.52-55
• /
• 2012

최근의 생명공학기술(Biotechnology, BT)은 정보통신기술(Information Technology, IT)을 떼고 생각할 수 없을 정도로 IT는 BT에 있어서 매우 중요한 역할을 하고 있다. BT에서 가장 중요한 전통적 툴 중 하나인 현미경도 그 예외가 아니다. 기존의 샘플을 눈으로만 관찰하는 단순 현미경이 아니라, 여러 생명 현상들을 생체 내에서 추적하고 실시간 분석을 해주는 첨단 현미경기술에서의 IT는 그 역할을 점점 더 강화하고 있다. 이 글에서는 생체현미경기술(Intravital Microscopy)에서 문제점을 극복하는 데 IT 기술이 어떻게 사용되고 있는지 살펴보기로 한다.

• (The)Study of the Eastern Classic
• /
• no.59
• /
• pp.405-428
• /
• 2015

Painting theorists in Song dynasty often spoke 'Li' when they talked about paintings. But 'Li' of the song dynasty is not limited to the 'ethics'. First, it includes visible 'natural's truth', such as the differences of 'geography' and 'physics' between the depicted objects. Second, it also includes 'common sense' which was based on both the observation and the thinking. The theorists thought if the 'common sense' was improper in the painting, the whole work was invalid. Thirdly, it also includes 'the reasonable sense in special situation', which requires great imagination ability and elaborative faculty. For example, when playing wind instruments and stringed instruments in the same time at the same concert, the painter should accurately draw the different gestures of musicians according to that the wind instrument is 'sound when the finger lift' and the stringed instrument is 'sound after the finger have left' in that moment. Fourthly, it includes 'art reason', theorists call it as 'ShenLi' or 'MiaoLi'. 'ShenLi' or 'MiaoLi' require the creator to join the spiritual concept besides his observation and thinking. For example, 'banana in snow' is neither observed available nor thought of available, but is the result of spiritual concept of creators for seeking everlasting. And at last, it certainly includes 'the principle of ethics'. Painters often highlighted the ethical relations of the feudal nation and the value of individual gentleman through the allegory story of figure painting and even the sudden composition in the landscape painting. 'Geography', 'physical', and 'common sense' are required the meticulous observation and the rational thinking for the painted object. And 'the reasonable sense in special situation', 'the art reason', 'the principle of ethics' are required enhancing painting style in the painting artistic conception and realm of life based on the nuanced observation, making 'technology' into the 'Tao'. This is the six reasonable increasing requirements for the painting work. Therefore, 'seeking the final reason' is the fundamental spirit of painting theory of Song Dynasty.

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2005.11a
• /
• pp.171-172
• /
• 2005