• Annals of Clinical Neurophysiology
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• v.1 no.1
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• pp.60-63
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• 1999

Transcranial Doppler(TCD) is an important diagnostic tool for evaluating the patients with stroke. It has some advantages and unique role when compared with other neuroimaging modalities. Recent development of transcranial color-coded Doppler(TCD) improves the limitation and pitfalls of TCD. The current indications of TCD are as follows: 1. Screening and evaluation of the intracranial major vessels 2. early detection and follow-up of vasospasm due to SAH 3. emboli detection (high-imtensity transient signals, HITs) 4. dignosis and follow-up of subclavian steal 5. evaluation of intracranial collaterals when the extracranial ICA has severe stenosis or occlusion 6. evaluation of cerebral perfusion pressure (intracranial pressure) 7. evaluation of arteriovenous malformation 8. diagnosis and follow-up of arterial dissenction 9. diagnosis and follow-up of venous sinus thrombosis (experimental).

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.5 no.4
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• pp.782-804
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• 2011

In video-based recognition systems, stationary cameras are used to monitor an area of interest. These systems focus on a segmentation of the foreground in the video stream and the recognition of the events occurring in that area. The usual approach to discriminating the foreground from the video sequence is background subtraction. This paper presents a novel background subtraction method based on a probabilistic approach. We represent the posterior probability of the foreground based on the current image and all past images and derive an updated method. Furthermore, we present an efficient fusion method for the color and edge information in order to overcome the difficulties of existing background subtraction methods that use only color information. The suggested method is applied to synthetic data and real video streams, and its robust performance is demonstrated through experimentation.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2002.07b
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• pp.961-963
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• 2002

Organic electroluminesencent device have been studied because of its easy fabrication and high brightness for plate panel display instead of cathode ray tube. There are some device structure for full color filter system can be applicable to the full color application if the blue light organic electroluminesencent device(OELD) is developed. In this study, we fabricated OELD of ITO/CuPc/PBD/LiF/Al using mixed of 500, 600, $700[{\AA}]$ by vacuum method as a emitting layer. We studied the voltage-current, voltage-luminance characteristics and blue light emission of OELD,

• Proceedings of the KSRS Conference
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• v.1
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• pp.60-63
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• 2006

Geostationary Ocean Color Imager (GOCI) is under development to provide a monitoring of oceancolor around the Korean Peninsula from geostationary platforms. It is planned to be loaded on Communication, Ocean, and Meteorological Satellite (COMS) of Korea. In this paper radiometric calibration concept of the GOCI is introduced. The GOCI radiometric response is modeled as a nonlinear system in order to reflect a nonlinear characteristic of detector. In this paper estimation approaches for radiometric parameters of GOCI model are discussed. For the GOCI, the offset signal depends on each spectral channel because dark current offset signal is a function of integration time which is different from channel to channel. The offset parameter can be estimated by using offset signal measurements for two integration time setting is described.

• Proceedings of the KSRS Conference
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• v.1
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• pp.75-78
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• 2006

The Korea Ocean Satellite Center (KOSC) is under development to establish in line with the launch of the first Korean multi-function geostationary satellite COMS (Communication, Ocean and Meteorological Satellite) scheduled in 2008. KOSC aims to receive, process and distribute Geostationary Ocean Color Sensor (GOCI) data on board COMS in near-real time. In this report, current status of KOSC development is presented in the following categories; site selection for KOSC, antenna design, GOCI data receiving and processing system, data distribution, future works.

• ETRI Journal
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• v.25 no.5
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• pp.288-296
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• 2003

In this study, we present a 260k color TFT LCD driver chip set that consumes only 5 mW in the module, which has exceptionally low power consumption. To reduce power consumption, we used many power-lowering schemes in the logic and analog design. A driver IC for LCDs has a built-in graphic SRAM. Besides write and read operations, the graphic SRAM has a scan operation that is similar to the read operation of one row-line, which is displayed on one line in an LCD panel. Currently, the embedded graphic memory is implemented by an 8-transistor leaf cell and a 6-transistor leaf cell. We propose an efficient scan method for a 6-transistor embedded graphic memory that is greatly improved over previous methods. The proposed method is implemented in a 0.22 ${\mu}m$ process. We demonstrate the efficacy of the proposed method by measuring and comparing the current consumption of chips with and without our proposed scheme.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.137-140
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• 2006

The prototype of the field emission display with carbon nanotube emitter is developed in this study. To improve the brightness and color gamut of the prototype, new phosphor material, $SrGa_2S_4:Eu$, is adopted instead of conventional CRT-green phosphor. By replacing the green phosphor, the prototype shows significant improvements in the brightness and color gamut. At the anode voltage of 7 kV and the anode current of $2{\sim}3\;{\mu}A/cm^2$ the brightness is higher than $600\;cd/m^2$. The luminous efficiency of the prototype is about 7.7 lm/Watt.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1111-1112
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• 2008

By adjusting the applied Software Method, One Physical Pallete can execute each colored Icon. Each Pallete includes Image's data and Image's Color data.Color data is composed of hex data by generating Pallette tool. This data is loaded by selecting Icon. Icon's selection is composed of current selected Icon and non-selected Icon by user. We must draw on these states to Meun's Icon.

• Journal of the Korean Society for Railway
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• v.9 no.6 s.37
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• pp.711-716
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• 2006

A set of design factors that should be considered during rail transit system development in proposed. As the current trend in the rail transit development emphasizes its role as a medium through which the interaction between the city environment and people takes place, the factors of harmony, color, characteristics, identity, and communication should be considered in the railway-transit system design. It's important to ensure that there exist harmony between the design and the civic environment, the influence of color on people is properly considered, the car design possesses distinct characteristics, and that the sense of common identity as well as effective communication is fostered between the system and people it serves. Several cases from various countries are presented to illustrate the points raised in the paper.

• The Bulletin of The Korean Astronomical Society
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• v.35 no.2
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• pp.37.2-37.2
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• 2010

The IMS (Infrared or Intermediate-wide, Medium-deep Survey) program for the search of z~7 quasars has been running since last year. In order to discover enough number of quasars at z~7, a strategy sufficing both survey area (~150 square deg.) and image depth (23 AB mag in J filter), together with using existing multi-wavelength data is chosen. We have been carrying imaging observations with the UKIRT 4m telescope, now covering ~50 square deg. (including UKIDSS survey area) of J-band data. We then used selection in color-color space to choose high-z quasar candidates having the rest-frame Ly-alpha break, and to exclude contamination from stars and galaxies at low-z. We show quasar candidates of redshift z~7 and z~6, out of 25 square deg. data analyzed, and note implications and future plans.