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Spin-Value 헤드용 Ni-Fe/Mn-Ir 다층박막의 적층순서에 따른 자기적 특성
김장현,노재철,윤성용,전동민,박준혁,서수정 대한금속재료학회(대한금속학회) 2000 대한금속·재료학회지 Vol.38 No.8
The purpose of this research is to find out the dominant factor determining exchange biased field and characteristics of Ni-Fe/Mn-Ir/buffer/Si bottom structure. We found out that the H_(ex) and the H_c of Ni-Fe/Mn-Ir multilayers depended on the grain size of Mn-Ir layer and the grain-to-grain epitaxy relationship at the interface between Mn-Ir and Ni-Fe layers. The blocking temperature, at which the exchange biased field disappears, of top structure was about 220℃ and that of bottom structure was about 180℃. The grain size of Mn-Ir layer in bottom structure is smaller than that in top structure. The bottom structure has more magnetic dead layer and less alignment of spin of the Mn-Ir layer than top structure.
김장현,김가람,박의환,박병국,JoongGon Son,Dong Hoon Kang 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.6
A simple method of measurement which can estimate the recombination coefficients and theinternal quantum efficiency (IQE) in GaN-based light-emitting diodes (LEDs) has been developed. The proposed method uses optical power decay, which can reflect real operational circumstances. The method, which is based on the electro-luminescence, is expected to extract values of the IQEin GaN-based LEDs effectively.
브랜드에 대한 성 일치성이 배너광고 기억효과에 미치는 영향
김장현,이재은,권혁태 한국마케팅관리학회 2013 마케팅관리연구 Vol.18 No.2
This study confirmed that the memory effect on banner advertising in gender consistency of social psychology between brand and the self by mediating effect of flow, gender consistency and flow are changed according to the type of banner advertising (picture vs. character) and context signified in banner advertising(accord vs. disaccord). The results are as followings : First, the more brand issued in banner ad. and self(social psychology) gender are matched up, the more high flow is showed. Second, the memory regarding banner ad.(product recollection, brand re-recognition, brand reminiscence) is increased in high flow case. Third, be researched that the flow mediates the memory effect on brand and self(social psychology) gender consistency. Forth, it showed no significant difference on the flow between brand and self (social psychology) gender consistency in the case of suggesting the type of banner advertising(picture vs. character) The last, effect on the flow between brand and self(social psychology) gender consistency in fifth hypothesis was predicted that disaccord between banner ad. and context will be greater than accord, but this hypothesis was not supported after analysis. The effect on the flow by gender consistency is noticeable in case of disaccord(vs. accord) between banner ad. and context. This effect can be more notable by using another sample, such as not product low-related like coffee, but product high-related. Whereas, the study can not exclude the flow concept is able to be changed contingent upon accord of context if the analyzed result is accepted as it is, because digital environment can make the flow high according to Dholakia and Bagozzi(2001). Therefore, there is not likely to exist an variable affected the flow accord or disaccord of context between digital environments. This paper also shows that accord or disaccord of context and the result of recollective independence all are figurative statistically. 본 연구는 브랜드와 자아의 사회 심리적 성 일치성이 플로우의 매개적 효과를 통해 배너 광고의 기억에 미치는 영향과 성 일치성과 플로우의 관계가 배너 광고의 형태(그림 vs. 문자)와 배너 광고가 게재된 맥락(일치 vs. 불일치)에 따라 달라진다는 것을 확인하였다. 연구결과 첫째, 배너 광고에서 제시된 브랜드와 자신의 (사회 심리적) 성이 일치한다고 지각할수록 보다 높은 수준의 플로우를 경험한다. 둘째, 높은 수준의 플로우를 경험할수록 제시된 배너광고에 대한 기억(제품군 회상, 브랜드 재인, 브랜드 회상)이 증가한다. 셋째, 브랜드와 자신의 (사회 심리적) 성 일치성이 기억(제품군 회상, 브랜드 재인, 브랜드 회상)에 미치는 영향은 플로우에 의해 매개된다는 것을 알 수 있다. 넷째, 브랜드와 자신의 (사회 심리적) 성 일치성이 플로우에 미치는 영향은 배너광고의 형태가 그림(vs. 문자)로 제시된 경우 더 크게 나타났다. 마지막으로 가설5는 브랜드와 자신의 (사회 심리적) 성 일치성이 플로우에 미치는 영향은 배너광고와 맥락이 불일치한 경우가 일치한 경우보다 더 클 것으로 예측하였으나 분석결과 가설5는 지지되지 않았다. 맥락과 배너광고가 불일치(vs. 일치)하는 경우 성 일치성이 플로우에 미치는 영향이 더 크다고 할 수 있으며, 이러한 영향은 다른 표본을 대상으로 하거나, 커피와 같은 저관여 제품이 아닌 고관여 제품을 이용하여 실험하는 경우 더 뚜렷하였다. 반면 본 분석 결과를 그대로 수용한다면 플로우라는 개념이 맥락 일치여부에 의해 달라진다는 것을 간과할 수 없다. 왜냐하면 디지털이라는 환경자체가 플로우를 높인다는 Dholakia and Bagozzi(2001)의 연구결과를 통해 이를 이해할 수 있다. 따라서 디지털 환경 내에서의 대상 간 맥락의 일치 혹은 불일치 여부가 플로우에 영향을 미치는 변수가 아닐 가능성도 존재한다. 본 연구의 분석 결과에서도 맥락 일치여부와 기억의 독립성 결과 모두 통계적으로 비유의적이었다.
새로운 인간(人間) 태반(胎盤)유래의 항응고(抗凝固) 단백질(蛋白質) PP27 (annexin Ⅴ형(型) 단백질(蛋白質))의 정제(精製)와 특성(特性)
김장현,Kim Jang-Hyun 대한한방소아과학회 2000 대한한방소아과학회지 Vol.14 No.2
It has long been known that Jahage(紫河車) extracts of Placenta hominis are effective for immunological and vascular diseases in human body and thus, was used a major constituent of traditional oriental medicines. From full-term human placenta, we have purified a new type anticoagulant protein, PP27, using different chromatographic techniques of a phenyl TSK gel 650M column, DEAE, HA and Mono-Q columns. PP27 showed single band on SDS-PAGE with a molecular mass (Mr) of 27 kDa under denaturing conditions and a calibrated Sepharose 4B column chromatography indicated a molecular mass of 23 kDa, indicating that the value is similar to those of other PP4 enzyme reported to date. Isoelectric point of PP27 was p15.2. The protein was found to inhibit the coagulation time in a concentration-dependent manner. PP27 was acted as a vascular anticoagulant of annexin type, inhibits the blood clotting process by binding of the essential lipids in a reaction which is dependent on $Ca2^+$ ions. In the presence of $Ca2^+$ ions, PP27 combines with platelet membranes neutralizing their procoagulant effect. Coagulation triggered by the addition of thromboplastin/ lipid- mixtures is extinguished by PP27.
김장현,전여선,김영삼 복식문화학회 2014 服飾文化硏究 Vol.22 No.1
This study researched the symbolic meaning of the costume colors in the independent film <Bittersweet Life>. The purpose of the study is to shed light on the relation between a film and the clothing color by exploring the symbolic meaning of costume colors as based on place images and as reflected in characters’ internal psychological states and situations. The conclusions of this study are as follows. First, the colors primarily presented were neutral shades of black and white or dark, almost-black tones, representing the negative narrative structure and depicting the image of a human being. Second, a series of bright blue shades were presented to reflect the positive narrative structure of a human being returning successfully to reality. Third, the application of color, involving both the psychological aspect as well as the symbolism of color, was effectively delivered to the audience. Fourth, the emphasis on color in the smallest details of costumes was analyzed, and it was found that symbolic color effectively communicated the whole image of transformation as the story progressed, clearly delivered delicate emotional messages, and contained symbolism relating to particular places and situations.