• JSTS:Journal of Semiconductor Technology and Science
• /
• 제15권5호
• /
• pp.533-538
• /
• 2015

Thermal characterization of individual pixels in microbolometer infrared image sensors is needed for optimal design and improved performance. In this work, we used thermoreflectance microscopy on uncooled microbolometer image sensors to investigate the thermal characteristics of individual pixels. Two types of microbolometer image sensors with a shared-anchor structure were fabricated and thermally characterized at various biases and vacuum levels by measuring the temperature distribution on the surface of the microbolometers. The results show that thermoreflectance microscopy can be a useful thermal characterization tool for microbolometer image sensors.

• Nuclear Engineering and Technology
• /
• 제50권6호
• /
• pp.929-936
• /
• 2018

A basic characterization of uranium samples was performed using gamma- and X-ray spectroscopy. The studied uranium samples were eight types of certified reference materials with $^{235}U$ enrichments in the range of 1-97%, and the measurements were performed over 24 h using a high-resolution and high-purity planar germanium detector. A general peak analysis of the spectrum and the $XK_{\alpha}$ region of the uranium spectra was carried out by using HyperGam and HyperGam-U, respectively. The standard reference sources were used to calibrate the spectroscopy system. To obtain the absolute detection efficiency, an effective solid angle code, EXVol, was run for each sample. Hence, the peak activities and isotopic activities were determined, and then, the total U content and $^{234}U$, $^{235}U$, and $^{238}U$ isotopic contents were determined and compared with those of the certified reference values. A new method to determine the model age based on the ratio of the activities of $^{223}Ra$ and $^{235}U$ in the sample was studied, and the model age was compared with the known true age. In summary, the present study developed a method for basic characterization of uranium samples by nondestructive gamma-ray spectrometry in 24 h and to obtain information on the sample age.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2005년도 제28회 학술발표회 초록집
• /
• pp.93-93
• /
• 2005

• Kyungpook Mathematical Journal
• /
• 제50권2호
• /
• pp.267-279
• /
• 2010

In this paper, we introduce the notion of a screen slant lightlike submanifold of an indefinite Kenmotsu manifold. We provide characterization theorem for existence of screen slant lightlike submanifold with examples. Also, we give an example of a minimal screen slant lightlike submanifold of $R_2^9$ and prove some characterization theorems.

• 한국동물학회:학술대회논문집
• /
• 한국동물학회 1995년도 한국생물과학협회 학술발표대회
• /
• pp.101-101
• /
• 1995

No Abstract, See Full Text

• International Journal of Automotive Technology
• /
• 제1권2호
• /
• pp.61-69
• /
• 2000

This paper will address the basic requirements for realizing a stop and go cruise control system. Issues discussed comprise: functional, sensor and basic HMI requirements, primary characterization of naturalistic stop & go driving, and the basic approach of the transformation of situational knowledge in an elementary controller.

• 한국환경과학회:학술대회논문집
• /
• 한국환경과학회 2006년도 학술발표회 발표논문집
• /
• pp.421-422
• /
• 2006

• Bulletin of the Korean Chemical Society
• /
• 제35권3호
• /
• pp.961-964
• /
• 2014

• Bulletin of the Korean Chemical Society
• /
• 제35권3호
• /
• pp.955-957
• /
• 2014

• 한국자기공명학회:학술대회논문집
• /
• 한국자기공명학회 2002년도 International Symposium on Magnetic Resonance
• /
• pp.78-78
• /
• 2002