• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.12
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• pp.1927-1934
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• 2021

The AtoN are installed and operated on the sea in order to help the safe navigation of ships. With the development of maritime ICT, to monitor and control the condition of AtoN from land using multiplex communication network such as AtoN AIS, CDMA, and LTE. Currently, The information of AtoN is difficult to integrated manage because AtoN management systems has been independently developed and operatie according to the operating conditions of the Regional Office of Oceans and Fisheries. In addition, in preparation for the introduction for e-navigation and MASS, systematic and unified information of AtoN is required. In this paper, we study to design and develop standard software for AtoN management system based on the international standard for navigation information(S-201). Through this study, it will be possible to provide continuous AtoN information and effective AtoN management.

• The Journal of the Acoustical Society of Korea
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• v.23 no.1E
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• pp.16-18
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• 2004

There have been numerous studies on the enhancement of the noisy speech signal. In this paper, I propose a completely new speech enhancement method, that is, a filtering of a dissonant frequency combined with noise reduction algorithm. The simulation results indicate that the proposed method provides a significant gain in audible improvement compared with the conventional method. Therefore if the proposed enhancement scheme is used as a pre-filter, the perceptual quality of speech is greatly enhanced.

• IMMUNE NETWORK
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• v.13 no.5
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• pp.222-226
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• 2013

Translocations involving chromosome 21q22 are frequently observed in hematologic malignancies including acute myeloid leukemia (AML), most of which have been known to be involved in malignant transformation through transcriptional dysregulation of Runt-related transcription factor 1 (RUNX1) target genes. Nineteen RUNX1 translocational partner genes, at least, have been identified, but not Homeobox A (HOXA) genes so far. We report a novel translocation of RUNX1 into the HOXA gene cluster in a 57-year-old female AML patient who had been diagnosed with myelofibrosis 39 months ahead. G-banding showed 46,XX,t(7;21)(p15;q22). The involvement of RUNX1 and HOXA genes was confirmed by fluorescence in situ hybridization.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2000.11b
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• pp.21-26
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• 2000

이 논문은 아날로그 CATV망을 이용하여 디지털 TV신호를 전송할 때의 성능을 연구하였다. 디지털 전송성능을 분석하기 위하여, 디지털 전송시스템은 DVB-C 규격을 적용하였으며, 채널손상요소로는 랜덤잡음과 극소반사(microreflection)를 고려하였다. 극소반사에 대한 모델링은 미국 CableLab사에서 측정한 값을 적용하였으며, 극소반사의 영향을 최소화하기 위해서 수신단에서 블라인더 등화기를 적용하였다. 전송성능은 $E_b/N_0$에 대한 BER과 MSE를 이용하여 표현하였다.

• The Journal of the Acoustical Society of Korea
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• v.22 no.3E
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• pp.110-112
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• 2003

There have been numerous studies on the enhancement of the noisy speech signal. In this paper, we propose a completely new speech enhancement scheme, that is, a filtering of a dissonant frequency (especially F# in each octave of the tempered scale) based on the fundamental frequency which is developed in frequency domain. In order to evaluate the performance of the proposed enhancement scheme, subjective tests (MOS tests) were conducted. The subjective test results indicate that the proposed method provides a significant gain in audible improvement especially for speech contaminated by colored noise and speaking in a husky voice. Therefore when the filter is employed as a pre-filter for speech enhancement, the output speech quality and intelligibility is greatly enhanced.

• Journal of Technology Innovation
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• v.11 no.2
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• pp.219-238
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• 2003

This study aims to investigate the impact of wide use of digital technology, in particular, the Internet, on innovation process and corporate strategy in electronics industry. The introduction of digital technology has changed innovation process, business model and organizational structure of the electronics companies. With the wide use of digital technology, the entire value chain of electronics industry from procurement, sales, and marketing to R&D and manufacturing has been restructured. This paper examine how digital technology has changed firms' behaviors in various areas through e-commerce, virtual reality and simulation, the rise of a new type of firm called EMS (Electronics Manufacturing Services), and etc. Amidst these changes building up innovation-friendly organization has emerged as a critical concern for firms. Due to the striking decrease of transaction cost, a network type of organization has proliferated, and a business function turns into a modular organization. As a whole, digital technology has pushed electronics firms into developing their own business model, which takes consideration of standardization of business platform and their core competency.

• Electronics and Telecommunications Trends
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• v.26 no.5
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• pp.161-176
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• 2011

최근 세계적으로 새로운 연구분야로서 그린 망(green network)의 에너지 효율에 관한 많은 연구와 학계 산업계 프로젝트가 활발히 진행되고 있고 많은 이슈가 오픈되어 폭 넓은 융합이 요구되고 있다. 이는 그린 통신망의 에너지 효율화 기술, 방법 및 솔루션이 미래 통신망을 크게 발전시킬 것으로 전망되기 때문이다. 본 고에서는 세계적으로 에너지 효율이 중요한 연구범위가 되고 있는 통신망의 에너지 소모를 줄이기 위하여 연구 및 산업 커뮤니티에 의해 시도된 주요 개념과 방법을 살펴보고 또한, 에너지 효율화와 관련된 세계 각국의 연구 동향과 표준을 알아본다.

• Journal of the Korean Magnetic Resonance Society
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• v.5 no.2
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• pp.130-137
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• 2001

Backbone dynamics of the catalytic residues in free and steroid-bound $\Delta$$^{5}$ -3- ketosteroid isomerase from Pseudomonas testosteroni has been examined by $^{15}$ N relaxation measurements. The relaxation data were analyzed using the model-free formalism to extract the model-free parameters (S$^2$, $\tau$$_{e}$, and R$_{ex}$). Tyr-34 and Asp-99 exhibit enhanced high-frequency (pico- to nanosecond) internal motions in the free enzyme, which are restricted upon ligand binding, while Asp-38 experiences severe restriction of the internal motions in the fee enzyme, suggesting that Tyr-14 and Asp-99 are more actively involved in the ligand binding than Asp-38. The results also indicate that the H-bond network in the catalytic cavity might be slightly strengthened upon ligand binding, which may have some implications on the enzyme mechanism.he enzyme mechanism.m.

• The Journal of the Acoustical Society of Korea
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• v.22 no.4E
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• pp.176-182
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• 2003

As the needs for wireless Internet service is increasing, the needs for secure m-commerce is also increasing. Conventional security techniques are reinforced by biometric security technique. This paper utilized the voice as biometric security techniques. We developed speaker verification system for m-commerce (mobile commerce) via wireless internet and wireless application protocol (WAP). We named this system the mVprotek. We implemented the system as client-server architecture. The clients are mobile phone simulator and personal digital assistant (PDA). The verification results are obtained by integrating the mVprotek system with SK Telecom's code dimension multiple access (CDMA) system. Utilizing f-ratio weighting and virtual cohort model normalization showed much better performance than conventional background model normalization technique.

• The Bulletin of The Korean Astronomical Society
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• v.44 no.2
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• pp.78.3-78.3
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• 2019

We develop a novel technique that can constrain the evolutionary track of the epoch of reionization (EoR) by applying the convolutional neural network (CNN) to the 21-cm differential brightness temperature. We use 21cmFAST, a fast semi-numerical cosmological 21-cm signal simulator, to produce mock 21-cm map between z=6-13. We design a CNN architecture that predicts the volume-averaged neutral hydrogen fraction from the given 21-cm map. The estimated neutral fraction has a good agreement with its truth value even after smoothing the 21-cm map with somewhat realistic choices of beam size and the frequency bandwidth of the Square Kilometre Array (SKA). Our technique could be further utilized to denoise the 21-cm map or constrain the properties of the radiation sources.