• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2003.06a
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• pp.18-21
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• 2003

In general it has been considered to be the difficult problem that we divide continuous speech into short interval with having identical phoneme quality. In this paper we used Gaussian Mixture Model (GMM) related to probability density to divide speech into phonemes, an initial, medial, and final sound. From them we peformed continuous speech recognition. Decision boundary of phonemes is determined by algorithm with maximum frequency in a short interval. Recognition process is performed by Continuous Hidden Markov Model(CHMM), and we compared it with another phoneme divided by eye-measurement. For the experiments result we confirmed that the method we presented is relatively superior in auto-segmentation in korean speech.

• Proceedings of the KIEE Conference
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• 2005.07c
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• pp.2333-2335
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• 2005

Various CMOS quadrature-voltage-controlled oscillators(QVCOs) are designed and fabricated for the comparison of the phase noise. The core VCO is composed of two Colpitts oscillators which are cross-coupled with PMOS pair. For the comparison of phase noise with the proposed scheme, the conventional LC VCO followed by the frequency-divide-by-two is designed. The simulation result demonstrate that the proposed scheme shows better phase noise performance by 6dB than that of a conventional scheme in which LC VCO is followed by the frequency-divide-by-two.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.181-184
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• 2019

본 연구는 결혼이민자들의 성공적인 정착을 위해서는 그 수단 중의 하나로서 정보격차 수준의 완화를 통하여 정보불평등에 따른 사회불평등을 해소시켜 주기 위한 정보화교육 활성화의 정책적 시사점을 제시하고자 하였다. 결혼이민자의 정보격차해소를 위한 정책적 시사점은 첫째, 결혼이민자를 위한 공공기관과 그들이 자주 이용하는 기관의 정보화 교육프로그램의 다양화에 따른 정보 접근권의 확대, 둘째, 인터넷을 통한 사회참여 활동 기회제공을 위한 시스템 구축마련, 셋째, 디지털기기를 이용한 이체, 송금, 계좌조회, 공인인증서, 세금납부, 각종 민원서류발급, 공과금, 고지서 확인, 각종 복지 및 보조금 신청, 공공서비스 관련 정보검색 등의 업무 능력 향상을 위한 '찾아가는 맞춤형 서비스 프로그램' 확대, 넷째, 인터넷 비이용자들을 위한 교재개발과 체계적인 커리큘럼 개발을 위한 교육기관 지원정책 확대, 다섯째, 결혼이민자를 위한 컴퓨터 자격증반의 운영을 활성화를 통한 취업 및 창업의 기반을 지원해주어야 함을 제시하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.665-666
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• 2022

Differential evolution is an efficient algorithm for continuous optimization problems. However, applying differential evolution to solve large-scale optimization problems quickly degrades performance and exponentially increases runtime. To overcome this problem, a new cooperative coevolution differential evolution based on Spark (referred to as SparkDECC) is proposed. The divide-and-conquer strategy is used in SparkDECC.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.559-560
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• 2021

Differential evolution is an efficient algorithm for solving continuous optimization problems. However, applying differential evolution to solve large-scale optimization problems dramatically degrades performance and exponentially increases runtime. Therefore, a novel cooperative coevolution differential evolution based on Spark (known as SparkDECC) is proposed. The divide-and-conquer strategy is used in SparkDECC.

• Journal of Digital Convergence
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• v.12 no.1
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• pp.1-12
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• 2014

The 2020 Digital polarization in accordance with rapid information and communication technology (ICT) development arises as an important issue in the society of the time in S. Korea. And at that time of 2020 S. Korea society due to the multicultural families of nearly one million people are expected to start full-scale multicultural society. So this study has been developed ways to bridge the gap as the digital divide with a discussion of multicultural society policy relevant to advent of the era of the informatization. Also under changing environment of this new paradigm, this study proposed that the future strategic direction like expanded and enhanced information services relevant to multicultural families in S. Korea. So this study focused on the strategy consulting of multicultural society policy with e-Government of S. Korea by the application of 'scenario planning' as a foresight method. As a result, A desirable future vision of multicultural society policy with e-government in S. Korea is to build 'open platform' based on ICT-integrated data services.

• Journal of the Korean Geographical Society
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• v.43 no.2
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• pp.202-219
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• 2008

As demand for high speed Internet service has explosively increased in the United States for the past decade, the construction or upgrades of telecommunication infrastructure has also been rapidly followed. Though currently many people in urbanized areas can be provided advanced broadband services, there are still challengeable areas to be served, such as remote or low populated areas because those areas are potentially non-profitable to commercial broadband service providers. This paper addresses the spatial disparity or in a broader term, the 'digital divide' of the broadband access by the county level in the United States. We propose the quantified measure of the county level broadband accessibility for identifying such digital divide. The developed measure is a hybrid form of the classical gravity based potential model and network topological accessibility, encouraged from the lack of prior efforts eying to explicitly incorporate the understanding of the whole process of the Internet access. The computational tasks are performed in a GIS platform, which includes several programmed functions.

• The Journal of the Korea Contents Association
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• v.10 no.8
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• pp.11-17
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• 2010

In this paper, we propose HMM-based upper-body gesture. First, to recognize gesture of space, division about pose that is composing gesture once should be put priority. In order to divide poses which using interface, we used two IR cameras established on front side and side. So we can divide and acquire in front side pose and side pose about one pose in each IR camera. We divided the acquired IR pose image using SVM's non-linear RBF kernel function. If we use RBF kernel, we can divide misclassification between non-linear classification poses. Like this, sequences of divided poses is recognized by gesture using HMM's state transition matrix. The recognized gesture can apply to existent application to do mapping to OS Value.

• Journal of KIISE:Computer Systems and Theory
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• v.27 no.5
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• pp.464-474
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• 2000

All-to-all personalized communication, or complete exchange, is at the heart of numerous applications, such as matrix transposition, fast Fourier Transform(FFT), and distributed table lookup.We present an efficient all-to-all personalized communication algorithm for a 2D torus inwormhole-routed networks. Our complete exchange algorithm adopts divide-and-conquer approach toreduce the number of start-up latency significantly, which is a good metric for network performancein wormhole networks. First, we divide the whole network into 2x2 basic cells, After speciallydesignated nodes called master nodes have collected messages to transmit to the rest of the basic cell,only master nodes perform complete exchange with reduced network size, N/2 x N/2. When finishedwith this complete exchange in master nodes, these nodes distribute messages to the rest of the masternode, which results in the desired complete exchange communication. After we present our algorithms,we analyze time complexities and compare our algorithms with several previous algorithms. And weshow that our algorithm is efficient by a factor of 2 in the required start-up time which means thatour algorithm is suitable for wormhole-routed networks.

• The Journal of the Korea Contents Association
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• v.20 no.9
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• pp.475-485
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• 2020

The purpose of this study is to examine factors influencing the digital divide between the baby boomer and elderly generation. Under this relationship, we investigated the age, education, family type, income, using attitude, using motivation, using outcome, cognition of intelligence information society, anxiety of intelligence information society, life satisfaction, social support. Research data were Using the data of 2017 Digital Divide Survey conducted by the National Information Society Agency(NIA), The final sample were 2300 who fully responded. As a result of factor, age, education, using attitude, using object, cognition of intelligence information society, life satisfaction significantly effected directly in baby boomer. Also, family types, cognition of information intelligence society, life satisfaction in elderly. Based on the results of this study, the implications and future studies of the baby boomer and elderly are suggested.