• Proceedings of the KIPE Conference
• /
• 1998.10a
• /
• pp.564-568
• /
• 1998

All elements and systems of electronics have optimum temperature conditions. A using of the thermoelectric method of cooling is the most approach for the thermal management of power electronics. An analysis of using the thermoelectric cooling and the temperature control is given as an efficient method of ensuring a work of power electronic devices in conditions of micro-miniaturization.

• Proceedings of the KIPE Conference
• /
• 1998.10a
• /
• pp.506-511
• /
• 1998

This paper gives and analytical expression of the average and rms currents of switching devices in volt-age-fed PWM inverters. It is shown that the device currents are represented by a function of the power factor of the load and the normalized output voltage of the inverter. The validity of the derived formulas is confirmed with simulation and experiment, showing that the modulation method has a minor effect on the characteristics of the device current.

• Proceedings of the Korean Vacuum Society Conference
• /
• 1993.02a
• /
• pp.6-6
• /
• 1993

With brief instroduction of fabrication methods of dia.ond fillls by plasma CVD, recent progress in diamond research mainly done in the author's laboratory at Osaka University is reviewed.especially on the following topics: "low temperature diallond fabrication", "ion implantation", "hydrogen plasma treatment of ion-implanted diaaond to remove ion-induced damage", "Oxygen diffusion into the bulk assisted by the hydrogen treatllent", and "hole-burning effect".ffect".

• 한국신재생에너지학회:학술대회논문집
• /
• 2009.11a
• /
• pp.373-376
• /
• 2009

CdTe thin films for photovoltaic cell devices were deposited on the glass substrates by solution-based deposition methods, at low temperature processing conditions. In order to characterize physical, optical, and electronic properties of CdTe light absorbing polycrystalline material, a series of analysis was carried out in this study.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2011.02a
• /
• pp.10-10
• /
• 2011

Graphene and graphene derivatives have attracted enormous attention from various research fields for applications in electronic devices, transparent electrodes, biosensors, drug delivery system and surface coatings. In the viewpoint of chemist, the chemical structure of graphene derivatives seems intriguing but detailed structures are being revealed only recently while engineering approaches for various applications are being executed very actively. Recently, several reports are available on interactions of graphene with biomolecules including proteins and nucleic acids. In this talk, I'll introduce recent studies which harness graphene derivatives for developing bioanalytical platforms to quantitatively analyze various enzyme activities. The systems rely on attractive interaction between graphene oxide and nucleic acids or phospholipids.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
• /
• 1997.11a
• /
• pp.146-151
• /
• 1997

Recntly many devics print electronic images in a variety of ways. But the reproduced color, gamut mappung method and expanded nonlinear quantization are proposed. The color gamut mapping uses saturation mapping of HSI color space. Dithering operation for printing uses expanded nonlinear quantization which considers overlapping phenomena of neighboring printing dots. So the printed image is similar to the image of monitor and can produce high quality image in the low bit color devices.

• Proceedings of the KIEE Conference
• /
• 1987.11a
• /
• pp.518-520
• /
• 1987

The semiconductor-metal-semiconductor structure is considered to be promising for high speed electronic devices. To realize this, the selective LPE and the proper design of epitaxial mask were adopted. Enhanced As diffusion made it possible to grow GaAs over W on GaAs. Buried W Schottky diode was fabricated and the rectifying I-Y characteristics were obtained.

• Journal of the Korean Electrochemical Society
• /
• v.17 no.3
• /
• pp.139-148
• /
• 2014

Electrochemical energy-storage devices such as batteries and supercapacitors are important components in emerging portable electronic device, electric vehicle, and clean energy storage and supply technologies. This review describes recent progress in the development of nanostructured electrodes, the main component of the electrochemical energy-storage device, prepared by layer-by-layer (LbL) electrostatic assembly. Major advantages associated with, and challenges to, the fabrication of LbL electrodes, as well as the future outlook for expanding the application of LbL techniques, are discussed.

• Proceedings of the KIEE Conference
• /
• 1998.07b
• /
• pp.737-739
• /
• 1998

This presentation describes an experiment to intergrated control, protection and measurement system configulation at KOWACO's Yongdam hydro-power station currently constructed by discrete electronic and electromechenical devices. The experiment is designed to exploit existing microcomputer technologies, digital signal processors, m/w&fiber optic communications. The theory of operation and advantages of the intergrated approach are discussed.

• Proceedings of the SAREK Conference
• /
• 2007.06a
• /
• pp.221-221
• /
• 2007