• Hwankyungkyoyuk
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• v.25 no.2
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• pp.224-241
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• 2012

The purpose of this study was to review the research trends in school environmental education. We analyzed 383 research papers that specifically focused on the school context which were 66% of the total number (N=577) published in this journal between 1990~2011. We defined the characteristics of review and developed a review method by examining previous review studies in this area. The review framework for school environmental education research was devised in terms of seven research areas: 1) Theories and objectives of school environmental education, 2) Environmental awareness, attitude and behavior, 3) Current issues in environmental education in the school context, 4) Instructions and programs, 5) National Curriculum, 6) Environmental education contents, and 7) Teacher professionalism. In this paper, we present dominant features within each category with focus on the overall trends of research methods and themes. Finally, we discuss research issues emerging out of the empirical analysis for considering the value of research for enhancing the quality of environmental education in schools.

• Proceedings of the Korean Society of Life Science Conference
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• 2007.10a
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• pp.84.1-84.1
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• 2007

See Full Text

• Bulletin of the Korean Chemical Society
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• v.31 no.10
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• pp.2985-2988
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• 2010

• Journal of the Korean Chemical Society
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• v.52 no.2
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• pp.203-206
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• 2008

• 대한치주과학회:학술대회논문집
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• 2007.11a
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• pp.173-174
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• 2007

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.795-798
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• 2008

The discharge characteristics of a flat plasma backlight with long electrode gap are investigated. The effect of operating voltage and repetition rate on brightness and luminance efficiency is investigated. A new high efficacy mode is found at low frequencies around 15-40 KHz; a lumen efficacy of 15.3 lm/W is achieved at a luminance of $2400\;cd/m^2$. In the high brightness mode, present at high voltage, we find a maximum luminance of $5900\;cd/m^2$ at 30KHz.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.1310-1312
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• 2005

Passivation of organic thin-film transistors (OTFTs) using organic and metal thin-film was presented. Parylene-C and titanium were used as an organic and metal layer, respectively. With the proposed passivation method the degradation of electric parameters of OTFTs was relieved compared with non-passivated devices. Several electric parameters such as on/off current, field-effect mobility, and threshold voltage were shown.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.1317-1319
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• 2005

Bottom contact pentacene organic thin-film transistors are fabricated at three different substrate temperatures, $70^{\circ}C$, $80^{\circ}C$ and $90^{\circ}C$. The maximum effective mobility was obtained at $80^{\circ}C$. The contact resistance was extracted by applying two different methods, TLM method and channel-resistance method, and the value shows the minimum at $80^{\circ}C$, which is thought to be the important reason for the best performance.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.549-550
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• 2006

It has become topic continuously at MEMS or semiconductor process to form three-dimensional multilayer structure. In this paper, we devised the new polymer pattern method that has multilayer structure. This is method that uses different kind of polymeric material. Specially, polymers used in this study that we propose became all pattern by photolithography, prevented that process increases. Here, polymer that we use used polymer of epoxy order called "SU-8" and polymer of novolak resin called "AZ-1518". The result, "SU-8" was formed pattern to 3.5um thickness, and "AZ-1518" about pattern 3um thickness. Also, It was been 6um thickness at same pattern area.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.475-476
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• 2006

Recently, the demand for high density MOSFET arrays are increasing. In implementing 3-D devices to this end, it is inevitable to ion-implant vertically in order to avoid screening effects caused by high silicon fins. In this study, the dependency of drain current characteristics on doping profiles is investigated by 3-D numerical analysis. The position of concentration peak (PCP) and the doping gradient are varied to look into the effects on primary current characteristics. Through these analyses, criteria of ion-implantation for 3-D devices are established.