• Proceedings of the KWS Conference
• /
• 2008.05a
• /
• pp.19-19
• /
• 2008

• Journal of the Korean Ceramic Society
• /
• v.52 no.6
• /
• pp.527-530
• /
• 2015

The electrical properties of nanostructured Gd-doped $CeO_2$ (n-GDC) as a function of temperature and water partial-pressure were investigated using ac and dc measurements. For n-GDC, protonic conductivity prevails under wet condition and at low temperatures (< $200^{\circ}C$), while oxygen ionic conductivity occurs at high temperatures (> $200^{\circ}C$) under both dry and wet conditions. The grain boundaries in n-GDC were highly selective, being conductive for protonic transport but resistive for oxygen ionic transport. The protonic conductivity reaches about $4{\times}10^{-7}S/cm$ at room temperature (RT).

• Environmental Analysis Health and Toxicology
• /
• v.19 no.1
• /
• pp.59-64
• /
• 2004

Metallothionein gene expression of diesel exhaust particles (DEP) was investigated in human lung epithelial cell line. DEP was collected from diesel motor bus and soluble fraction in water was obtained. Cells, grown to near confluence, were exposed to 5-50 ppm DEP for 6 hours. Regarding the metallothionein gene expressions, MT-1 and MT-2 were induced in the DEP-treated cell by using RT-PCR and real-time PCR. However, MT-3 which is known to be brain specific, and another isoform MT-4 were not expressed in cadmium-treated groups as well as control group. Heavy metal of DEP was also analyzed and Zn was found as the major component of heavy metals in DEP used in this study.

• Proceedings of the KIEE Conference
• /
• 1987.11a
• /
• pp.197-199
• /
• 1987

This paper is investigated on characteristics of photoresist using inorganic a-$Se_{75}Ge_{25}$. The sensitivity of negative photoresist showing insolubility against alkalie solution, with Ag-photodoped, is more prominent than that of positive photoresist used with only a-$Se_{75}Ge_{25}$. It is also showed that the contrast of negative photoresist, ${\gamma}=2.9$, is more prominent than that of positive photoresist, ${\gamma}=1.4$.

• Proceedings of the Korea Contents Association Conference
• /
• 2016.05a
• /
• pp.469-470
• /
• 2016

본 논문에서 제안하는 실내 위치기반서비스는 현행 송수신 통신에서의 움직이는 사용자를 대상으로 한다. 비콘의 주요 송출 신호인 RSSI 값을 이용하여 거리에 따른 비콘의 RSSI 값을 측정한다. 원거리에서 RSSI 값이 불안정하기 때문에 불안정한 신호를 보정하기 위해 RSSI 측정결과 필터링을 사용하여 원거리에 대한 값을 보정하는 알고리즘에 대해 설계 및 구현한다. 이를 위해 초기 단일파을 중심으로 실내측위가 이루어졌으며, 위치보정 및 오차범위에 대한 보정작업 역시 논의되었다.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2019.09a
• /
• pp.36-36
• /
• 2019

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2020.06a
• /
• pp.96-96
• /
• 2020

• 한국전산유체공학회:학술대회논문집
• /
• 2008.08a
• /
• pp.82.2-82.2
• /
• 2008

• 한국전기화학회:학술대회논문집
• /
• 2003.10a
• /
• pp.69-70
• /
• 2003

• Proceedings of the Optical Society of Korea Conference
• /
• 2008.02a
• /
• pp.227-228
• /
• 2008