• 제목/요약/키워드: new-silver

검색결과 300건 처리시간 0.023초

전면 전극용 Ag paste의 전기적 특성 평가 (Characterization of Electric Properties of Ag Paste for Using Front Metal)

  • 오동해;이승직;김일;김기형
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2010년도 추계학술대회 초록집
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    • pp.45.1-45.1
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    • 2010
  • 소성 온도에 따른 전면 전극과 태양전지 에미터와의 계면에서 전기적 특성을 평가하였다. Ag 전극 형성 시 특정 온도 이상의 열처리 과정을 통해 에미터와 전극 간 양질의 전기적 접촉을 형성하기 위해 소성 온도에 따라 Ag paste 내의 siver가 결정화되어 에미터 내부로 성장함을 확인 하고 Ag 전극의 전기적 특성을 평가하였다. 소성 온도 $650{\sim}750^{\circ}C$에서 전기적 특성이 가장 좋았으며 silver의 결정 생성에 의해 Ag paste와 에미터 간 전기적 접촉이 잘 형성됨을 확인 하였다.

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노인 정보통신기술 사용 행태에 대한 연구방향 제시: SILC (A suggestion of the research direction for older adults' ICT use behaviors: SILC)

  • 이웅규
    • 한국정보시스템학회지:정보시스템연구
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    • 제22권3호
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    • pp.59-75
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    • 2013
  • Although information communication technology (ICT) has been one of the most important infrastructures for our societies, it is still considered as a kind of black box having a barrier to be accepted and being not easily understood. Nevertheless, there are no proper research models or theories for explaining older adults' ICT uses. The objective of this study is to suggest a direction for studying older adults' ICT using behaviors. For this purpose, based on the review and analysis of current studies, main research issues are discussed and a new research framework for the research of older adults' ICT use, Silver ICT users Life Cycle(SILC), is suggested.

서울지역 한강에 서식하는 3종의 미기록 하모충류 (New Records of Three Oxvtrichid Hvpotrichs (Ciliophora : Hvpotrichida: Oxvtrichidae) from the Han River in Seoul, Korea)

  • 신만균;김원
    • 한국동물학회지
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    • 제36권2호
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    • pp.223-230
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    • 1993
  • Three species of oxvtrichid hypotrichs collected from the Han River on Sune 6, and August 26, 1992 have been cultured at laboratory. Thev were identified as Oxvtricha hvmenostoma Stokes, .1887, 0. hoemutoplasma Blatterer and Foissner, 1990 and Tochvsomu pellionellum (Muller, 1773). These species are reported for the first time from Korea. Morphological and biometrical studies were carried out by observing both wild and cultured cells and the infraciliature of silver stained specimens. The present species were redescribed and analvzed biometricallv.

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Recent Developments in High-performance Liquid Chromatography of Lipids

  • Christie, William W.
    • 한국응용과학기술학회지
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    • 제10권1호
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    • pp.1-8
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    • 1993
  • The possibilities for HPLC analysis of lipids have been revolutionised by the availability of evaporative light-scattering detectors, with which the response is independent of the nature of the mobile phase and does not depend On the presence of specific chromophores in the lipids. It was thus possible to develop an HPLC procedure, involving ternary gradient elution, for separating all the lipid classes in animal tissues in a single step. Although reversed-phase HPLC has been widely used for the analysis of molecular species of lipids, sliver ion chromatography can be a valuable alternative. For example, a stable silver ion column for HPLC was developed which permitted resolution of molecular species of triacylglycerols, even from such complex samples as fish oils, again With light-scattering detection and gradient elution. The capacity for HPLC resolution of diastereomeric diacyl-sn-glycerol derivatives, prepared from triacylglycerols. has lead to a new simple method for stereospecific analysis of the latter.

서양복식사에 나타난 금제고찰 (A Review on the Sumptuary Laws of Western Costume)

  • 김인숙
    • 대한가정학회지
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    • 제19권3호
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    • pp.1-9
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    • 1981
  • The object of this study lies in reviewing of the western costume history in the light of the negative regulations concerning costumes and adornments. Readings related with the subject lead to the following findings; 1. the principal purpose of the sumptuary laws has relationship with the social stratification of the feudalism and the frequency of their occurrence is related with the formation of feudal system, its decline, the appearance of imperial regimes and the start of civil revolutions. 2. Sumptuary regulations spread westward with the flow of civilization, eg., in the sequence of Italy, swiss, France, Britain and new world. 3. Sumptuary laws are also found in abundance in the english colonies of America, and their object seems to be rather of the moral concern than class distinction of economical restriction.4. The reviewed sumptuary regulations are concerned with : A. Material gold or silver clothes, silks, ermine, marten or miniver furs, velvets, laces and embroies. B. Colors-Purple, scarlet and red. Other colors do not show consistent pattern of color-status symbol; C. Form-Length and width of headdresses, shoes, collars, trains or hoops. E. numbers of dresses allowed to be worn.

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Properties of Xe plasma flat fluorescent lamp by screen printing

  • Lee, Yang-Kyu;Kang, Jong-Hyun;Yoon, Seung-Il;Kim, Tae-Kwon;Bae, Sung-Jo;Oh, Myung-Hoon;Lee, Dong-Gu
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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    • pp.1386-1389
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    • 2006
  • In this study, a plasma flat fluorescent lamp having a new structure was fabricated by screen printing technique. Coplanar types of silver electrodes with a dielectric layer were screen-printed on a rear glass plate, and then fired at $550^{\circ}C$ and $580^{\circ}C$, respectively. Phosphor was spin-coated on the dielectric layer with firing at $490^{\circ}C$. Several types of lamps were designed and its properties wee investigated with electrode shape, gas pressure, etc.

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액중 전기폭발에 의한 금속 나노분말 제조 (Preparation of the Metallic Nanopowders by Wire Explosion in Liquid Media)

  • 조주현;김병걸;박상하;강창일;이홍식;임근희
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제55권9호
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    • pp.452-455
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    • 2006
  • The technology of wire explosion have been used to product nanopowders. A new concept was proposed to produce metallic nanosized powders, which is wire explosion in liquid media. We have exploded the Ag or Cu wires of diameter of O.3mm, 40mm long, in the de-ionized water or acetone, respectively. Electrical energy of 1.1kJ was stored in 10uF capacitor and released to the wires through a triggered spark gap switch. The process was observed by high-speed camera. Those images showed that the powders were generated by vapor condensation in the shell formed by shock wave in the water. The particles were directly dispersed into the water with collapse of the shell. The sizes of Ag and Cu nanopowders were evaluated to 35nm and 17nm, respectively.

Oxygen-Silver Junction Formation for Single Molecule Conductance

  • Jo, Han Yeol;Yoo, Pil Sun;Kim, Taekyeong
    • 대한화학회지
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    • 제59권1호
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    • pp.18-21
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    • 2015
  • We use a scanning tunneling microscope based break-junction technique to measure the conductance of a 4,4'-dimethoxybiphenyl molecular junction formed with Ag and Au electrodes. We observe the formation of a clear molecular junction with Ag electrodes that result from stable Ag-oxygen bonding structures. However we have no molecular bonding formation when using Au electrodes, resulting in a tunneling current between the top and bottom metal electrodes. We also see a clear peak in the conductance histogram of the Ag-oxygen molecular junctions, but no significant molecular features are seen with Au electrodes. Our work should open a new path to the conductance measurements of single-molecule junctions with oxygen linkers.

Infrared Thermography Quantitative Diagnosis in Vibration Mode of Rotational Mechanics

  • Seo, Jin-Ju;Choi, Nam-Ryoung;Kim, Won-Tae;Hong, Dong-Pyo
    • 비파괴검사학회지
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    • 제32권3호
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    • pp.291-295
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    • 2012
  • In the industrial field, real-time monitoring system like a fault early detection is very important. For this, the infrared thermography technique as a new diagnosis method is proposed. This study is focused on the damage detection and temperature characteristic analysis of ball bearing using the non-destructive infrared thermography method. In this paper, thermal image and temperature data were measured by a Cedip Silver 450 M infrared camera. Based on the results, the temperature characteristics under the conditions of normal, loss lubrication, damage, dynamic loading, and damage under loading were analyzed. It was confirmed that the infrared technique is very useful for the detection of the bearing damage.