• Journal of the Korean Institute of Telematics and Electronics
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• v.21 no.2
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• pp.24-28
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• 1984

A new type of digital echo canceler for two-wire digital transmission is presented. The new principle estimates an echo signal by use of the arithmetic means estimate for each transmitted data pattern, which leads to relatively simple hardware. The principle is compared with adaptive digital filter methods through theoretical analysis and computer simulation. The results show that the proposed method has fast convergence property with respect to its hardware simplicity and that the convergence time is independent of echo level. Quantization effects are also analyzed.

• Korean Journal of Optics and Photonics
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• v.24 no.6
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• pp.324-330
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• 2013

Phase-measuring deflectometry is a full-field gradient measuring technique that lends itself very well to testing specular optical surfaces. We have measured deformation of a large specular surface by deflectometry. In this work, we have used a Fourier-transform method to get the phase from a measured deformed fringe pattern, and we have used least squares method to obtain the height information of the specular surface from the calculated slope. Experimentally, we have confirmed that deflectometry can be used for deformation measurement of a specular surface like that of a wafer.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.2
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• pp.366-375
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• 2016

The purpose of this research is to describe the experiences of transfer students in nursing colleges. This study was based on the qualitative content analysis. To collect qualitative data, 10 personal interviews were conducted from June 2013 to September 2014. Five sub-themes emerged from the data as follows: Participants started new challenge with self-confidence; Nursing science was difficult and unfamiliar disciplines to them; Firstly, they had no place in nursing department, but got places of their own over time; They managed to hold their own in confronting with difficulties; They consequently made personal upgrades in their life. The results of this study could guide nursing faculties to understand what kind of burdens transfer students experienced, how they had adapted to them, and how to support them to realize their full potential to grow into competent nurses.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.17 no.1
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• pp.28-43
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• 1988

The purpose of this research is to produce bin weather data for Seoul from Standard Weather Data. The intended use of these data is for input to recently developed models for simplified energy calculations and for generating variable-base degree-day information. The data produced under this study include $3^{\circ}C$ bin data covering the full range of dry-bulb temperatures with mean coincident wet-bulb and daytime coincident solar radiation, wet-bulb bins down to freezing temperature, wind speed bins with prevailing directions, and heating and cooling degree hours to nine different temperature bases. All of these data are tabulated in six separate time periods and total daily categories for monthly and annual periods.

• Annual Conference on Human and Language Technology
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• 2000.10d
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• pp.95-100
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• 2000

문자 인식기를 가지고 스캔된 원문 이미지를 인식한 결과로 형태소 분석과 어절 분석을 통해 대용량의 문서 정보를 데이터베이스에 구축하고 전문 검색(full text retrieval)이 가능하도록 한다. 그러나, 입력문자가 오인식된 경우나 띄어쓰기가 잘못된 데이터는 형태소 분석이나 어절 분석에 그대로 사용할 수가 없다. 한글 문자 인식의 경우 문자 단위의 인식률은 약 90.5% 정도나 문자 인식 오류와 띄어쓰기 오류 등을 고려한 어절 단위의 인식률은 현저하게 떨어진다. 이를 위해 한국어의 음절 특성을 고려해서 사전을 기반하지 않고 학습이 잘된 말뭉치(corpus)와 음절 단위의 bigram 정보를 이용한 자동 띄어쓰기를 하여 실험한 결과 학습 코퍼스의 크기와 띄어쓰기 오류 위치 정보에 따라 다르지만 약 86.2%의 띄어쓰기 정확도를 보였다. 이 결과를 가지고 형태소 분석과 언어 평가 등을 이용한 문자 인식 후처리 과정을 거치면 문자 인식 시스템의 인식률 향상에 크게 영향을 미칠 것이다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.10 no.16
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• pp.19-26
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• 1987

Since many small and medium sized enterprises have lack of funds to install the full scale Computer Aided Process Planning this study has been attempted to develop a part of computer generated production information system for a start. The system is programmed by DBASE III and BASIC languages for the IBM-PC competables for the sake of user's convenience. The system consisted of four major parts. The first part is a computerized work measurement system for applying WF predetermined time standards. The second part is a computerized forecasting and loading system for applying various statistical techniques. The third part is a GT scheduling system programmed by BASIC for applying heuristic scheduling method. Finally, the last part is a simulation system for GT scheduling efficiency test which is programmed by SIMAN simulation language.

• Journal of the Semiconductor & Display Technology
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• v.15 no.1
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• pp.33-35
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• 2016

This paper proposes a method utilizing image compression and transmission method for image segmentation in order to reduce the time required in the process of analyzing the image information that has in the image compression process. Many studies of existing with respect to the image segmentation are being studied as a way to split a lot of a particular part in the image. We divide full image into the N equal parts. And it is compressed using the field coding. This will reduce the time-consuming than using the conventional method.

• Korea Journal of Hospital Management
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• v.15 no.1
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• pp.70-92
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• 2010

Now more than ever, many journalists are using hospitals' homepages for articles about hospitals, their mission, research, and events. Therefore hospitals' homepages have to be planned and constructed for journalists. The purpose of this study is to investigate hospitals' online media relations through analysing homepages. For investigating specifically, this study compares hompages of hospitals in Korea and hospitals in USA. This study uses four categories; basic media relations tools, useful information, interactive communication tools, and ease of use for journalists. The result of this study shows that hospitals' homepages in Korea are needed to improve for building with journalists. The hospitals' hompages have to be constructed by a variety of materials; press room, image and graphic archives, multimedia resources, and interactivity or responsiveness. This study suggests that the hospitals' homepages have the potential to achieve the desired public relations objective but are not commonly being used to their full potential in media relations.

• Journal of Information Display
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• v.5 no.2
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• pp.10-13
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• 2004

We have developed a new PDP cell structure called MARI(Multi Anode for Reduction of Ionic effect) and new driving scheme achieving a high luminous efficacy. The MARI PDP has middle electrode inserted between X and Y main electrodes. In the MARI PDP, reset and scan voltage is applied to middle electrode and sustain voltage is applied to X and Y electrode. Using a long gap sustain discharge we accomplished a high luminous efficacy. And we developed 42"full panel adopting MARI structure and new driving scheme and attained luminous efficacy of 2.35 lm/W.

• Journal of Communications and Networks
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• v.9 no.2
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• pp.167-176
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• 2007

In multimedia communication systems, efficient transmission system design should incorporate the use of matching unequal error protection (UEP), since source coders exhibit unequal bit error sensitivity. In this paper, we present UEP schemes which exploit differences in bit error protection levels in orthogonal frequency division multiplexing (OFDM) systems over frequency selective fading channels. We introduce an UEP scheme which improves the link performance with multiple transmit and receive antennas. Especially, we propose a new receiver structure based on two stage Maximum Likelihood detection (MLD) schemes which can approach the performance of a full search MLD receiver with much reduced computational complexity. In the performance analysis, we derive a generalized pairwise error probability expression for the proposed UEP schemes. Simulation results show that the proposed schemes achieve a significant performance gain over the conventional equal error protection (EEP) scheme.