• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.247-248
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• 2008

We investigated the influence of uniparabolic graded distributed Bragg reflector (DBR) using digital alloy on vertical series resistance and reflectivity of DBRs. Measured specific DBR series resistance was reduced to about 8.787${\times}$$10^{-6}$${\ohm}$ $cm^2$/period for digital alloy uniparabolic graded DBR. This was better than various graded DBRs, especially biparabolic graded DBR. Reflectivity of 42 pair uniparabolic graded DBR was found to be comparable to that of biparabolic graded DBRs.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.30 no.4
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• pp.22-26
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• 2012

• Korean Journal of Digital Imaging in Medicine
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• v.1 no.1
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• pp.1-7
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• 1995

• Journal of Advanced Marine Engineering and Technology
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• v.31 no.7
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• pp.863-871
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• 2007

This paper proposes a methodology to estimate the system coefficients for the infinite impulse response(IIR) digital filters using real code GA. In the traditional real coded GA, it adapts the general genetic operations, whereas in this paper the proposed real coded GA applies improved genetic operations in order to search the optimal solution in given problems. Each of unknown IIR digital coefficients collected as forms of a chromosome. Two illustrative examples including the band pass and band stop IIR digital filters are demonstrated to verify the proposed method.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.794-799
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• 2005

Robust DC-DC converter which can cover extensive load changes and also input voltage changes with one controller is needed. In this paper, we propose a method for determining the parameters of 2DOF digital controller which makes the control bandwidth wider, and at the same time makes a variation of the output voltage very small at sudden changes of resistive load and the input voltage. The 2DOF digital controller whose parameters are determined by the proposed method is actually implemented on a DSP and is connected to a DC-DC converter. Experimental studies demonstrate that this type of digital controller can satisfy given specifications.

• Journal of Distribution Science
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• v.22 no.12
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• pp.11-21
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• 2024

Purpose: This study explores the factors affecting integrated marketing communication and examines the relationship and impact of market orientation, innovative marketing strategies, and integrated marketing communication via digital media (IMC Digital) on the brand equity of e-commerce businesses in Bangkok. Research Method: The research method is survey research. The data was collected by a questionnaire from 134 online retail business executives in Bangkok. Then, the data were analyzed by t-test, ANOVA, and MRA. Results: The findings are as follows. (1) Innovative Marketing Strategies and Digital Marketing Communications have a relationship and impact on the Brand Equity of E-Commerce Businesses at the statistical level of .05. (2) Market Orientation has no relationship and impact with the Brand Equity of E-Commerce Businesses(3) Marketing-oriented factors, customer focus, competitor focus, and interagency cooperation, are at the highest level. (4) Innovative marketing strategies comprise product and packaging design innovations, introducing new pricing strategies, and new retail concepts. The new promotion concepts are at the highest level. (5) Integrated marketing communications via digital media (IMC Digital) with controllable communication is at the highest level so is uncontrollable communication. (6) Brand Equity with brand awareness and brand image are at the highest level.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.4
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• pp.127-132
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• 2014

In this paper, we propose a digital signage method that can control the contents of the screen and download the desired files to individual smart terminal with no touch of digital signage screen by using Kinect. The main features and contributions of the proposed method are as follows. First, can solve the problems such as the risk of bacterial infection, not cleanliness on the screen as well as maximize advertising effectiveness. Second, can support bi-directional communications with computer while we touch only wanted advertisements. The performance evaluation shows the effectiveness of the proposed method. Especially, we can see that the proposed system operates through the recognition of user's actions when the cursor is within the scope of a certain coordinate and the file transfer time to download information is different depending on the PC performance and the version of personal smart device.

• Journal of Broadcast Engineering
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• v.10 no.2
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• pp.210-220
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• 2005

This paper presents and analyzes laboratory test results of Equalization Digital On-Channel Repeater (EDOCR) using ATSC(Advanced Television Systems Committee) terrestrial digital TV broadcasting system. The EDOCR laboratory test, which is done at CRC(Communications Research Centre) Canada, is classified to receiver test, transmitter test, and synchronization test between transmission and reception frequencies. The receiver part includes feedback signal, random noise, single echo, multi-path ensemble, and NTSC/DTV interference test. The transmitter part includes out-of channel emission, quality of transmitting signal, and phase noise test. By the field test results, the receiver part of the EDOCR eliminates average 5.5 dB of feedback or single echo signal in range of 0 to 11 ${\mu}s$ and has average 18.6 dB at TOV(Threshold of Visibility) under random noise environment. Also, the transmitter part of the EDOCR satisfies the specification of US FCC(Federal Communications Commission), and frequency difference between transmitter and receiver is zero.

• Proceedings of the IEEK Conference
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• 2001.09a
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• pp.535-538
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• 2001

In this paper, we present a novel method to solve the inevitable RGB beam mismatch problem in projection TV receivers. Conventional methods solve the mismatch problem by directly controlling the cathode ray tube (CRT) using the convergence yoke (CY). Unlike conventional methods, the proposed method is based on digital video processing using image warping techniques. Firstly RGB beam projection paths are mathematically modeled. Then based on the modeling, the input video signal to CRT is prewarped so that RGB beams are landed at the same point on the screen. Since the proposed method is based on a digital video processing instead of using CY, it can outperform the conventional method in terms of quality and cost. The experimental results with a real 60´projection TV demonstrate that the proposed method indeed produces converged images on the projection TV screen.

• Journal of Broadcast Engineering
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• v.12 no.4
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• pp.333-341
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• 2007

Multi-view video has recently gained much attraction from academic and commercial fields because it can deliver the immersive viewing of natural scenes. This paper presents multi-view video processing being composed of intermediate view reconstruction (IVR), graphics composition, and multi-view video viewer. First we generate virtual views between multi-view cameras using depth and texture images of the input videos. Then we mix graphic objects to the generated view images. The multi-view video viewer is developed to examine the reconstructed images and composite images. As well, it can provide users with some special effects of multi-view video. We present experimental results that validate our proposed method and show that graphic objects could become the inalienable part of the multi-view video.