• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.12C
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• pp.1135-1141
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• 2007

In this paper, an adaptive bit-reliability mapping is proposed for the bit-level Chase combining in LDPC-coded high-order modulation systems. Contrary to the previously known bit-reliability mapping that assigns the information (or parity) bits to more (or less) reliable bit positions, the proposed mapping adaptively assigns codeword bits to the bit positions of various reliabilities by considering the characteristics of code and protection levels of bits in high-order modulation symbol. Compared with the symbol-level Chase combining and the constellation rearrangement bit mapping, the proposed mapping gives $0.7{\sim}1.3$ dB and $0.1{\sim}1.0$ dB performance gain at $FER=10^{-3}$ with no additional complexity, respectively. Adaptive bit-reliability mappings are derived for various environments and the validity of them is confirmed through simulation.

• Korean Security Journal
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• no.37
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• pp.109-135
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• 2013

The purpose of the study was to analyze how organizational learning of police officers affects empowerment components as this learning method works as a way to maximize the police organization. In order to achieve the research goal, the study selected a total of 170 police officers on duty in Gwangju Metropolitan Police Agency as a research subject for a month from July 14, 2013 to August 15. The subjects were selected via the random sampling method and were told to participate in a survey of a self-administrated method. A total of 163 (95.5%) references were used for the final analysis. The collected data was processed with SPSS for Win Version 18.0 and the variables were went through Pearson's Correlation Analysis and Multiple Regression Analysis. The results are summarized as follows. First, a hypothesis of "how social demographic characteristics have a different influence on organizational learning and empowerment" was partially confirmed. Second, another hypothesis of "how organizational learning affects empowerment of the members" was adopted.

• Journal of the Society of Naval Architects of Korea
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• v.34 no.4
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• pp.12-20
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• 1997

A potential-based panel method has been developed to investigate the resistance characteristics of a high speed catamaran advancing on the free surface. Normal dipoles and sources are distributed on the body surface while sources are distributed on the free surface. Linearised free surface conditions are used in the present analysis. To avoid the instabilities due to the velocity difference between inner and outer flow of a high speed catamaran, Kutta condition has been applied at the stern. Model test has been carried out not only to validate the numerical results but to confirm the capabilities of a CWC(Circulating Water Channel). It is believed that we can obtain the qualitatively reasonable results in the CWC. Computed results are compared with those of experiments and Insel's experimental values. Since the Kutta condition is applied at the stern, stable solutions are obtained at the high speed range. The present method, using linearised free surface conditions at the high speed range, seems to be a useful tool in the hull form design of a high speed catamaran.

• Korean Security Journal
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• no.17
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• pp.195-220
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• 2008

Various Kinds of social pathology and crimes that threaten our daily safety are on the increase in process of time as a result of the development of science and technology empty of moral sense, Value Confusions, apolaustic tendency, economic and social transformation recently. Moreover the effective provision of police service lies beyond the boundaries of the police organization. Therefore private security personnel have made an effort for safety and protection of group as well as an individual through the introduction of private security industry based on a benefit principle and private security industry is being become complexes utilizing technology as well as high-end devices through various international events. The field of private security industry in Korea is being extended rapidly with expansionism of society and public services but the quality improvement is declining. Furthermore the study of recruit education program for security personnel as the basis of quality improvement is insufficient compared with the study of police service. Consequently, this investigation is going to contribute to development of recruit education program for security personnel through the analysis about difference of each subject usability for education about electronic security and facility guard.

• The Journal of the Korea Contents Association
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• v.12 no.11
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• pp.119-132
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• 2012

Korea's latest quantitative urban development led to a result to lose our public properties' identity provided by urban environment, so we now have to think how to solve environmental matter of one-sided public design. Because one city's public environment is the central axis to determine its first impression and also connected with its overall value, the region's value show obvious differences by its urban scape design. Therefore we analyzed current cityscape of Tokyo's Marunouchi street and Avenue des Champs-Elys$\acute{e}$es in Paris which applied how to connect visual and physical characteristics of urban space representation to outdoor space's nature well, and tried to reconsider what is our design identity of creative cityscape.

• Journal of the Korean Chemical Society
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• v.40 no.5
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• pp.357-364
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• 1996

Stereochemistries of acetoxy 1,3-oxathiolane 1 were determined by two methods. First, the structures of $\alpha$ isomer 7 and $\beta$ isomer 9 were confirmed by the difference of their conversion rates to dihydrooxathiin 2 under acid catalysis. When the acetoxy leaving group is located in trans relationship to sulfur, a isomer in which carboxanilide is less hindered sterically against the 1,3-oxathiolane ring is $\beta$ isomer 7, and the other isomer of which the reaction rate is slower than 7 is $\beta$ isomer 9. Second, in the deuterium reactions of diastereomeric sulfoxides, the isomers of which methine hydrogen is substituted to deuterium were cis isomers 15 and 17, and another isomers of which methyl hydrogen is substituted to deuterium were trans isomers 16 and 18. Substitution of either methine or methyl hydrogen to deuterium resulted from stereospecific ring opening followed by recyclization by [2,3] sigmatropic rearrangement.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.11
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• pp.1741-1748
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• 2013

In this paper, we proposed new virtualization technology that is more convenient and stable in local computing environment, then found technique elements need to desktop virtualization which is based on clients in various virtualization technologies. After running excution of process explorer utility in user level virtualization and VMWare, we found memory capacity that is used 30.1MB in VMWare and 16.6MB in user level virtualization respectively to compare private bytes each of process. We found no significant difference of CPU utilization which is executed application program in local computing environment and user domain with user level virtualization. In this result, proposed virtualization technology is able to minimize performance degradation of local computing environment.

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.164-164
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• 2017

국내 해양관련 HNS 데이터베이스의 정보를 구축하는 중에 확인된 문제점들은 크게 두 가지로 요약된다. 첫 번째는 물질정보가 없는 경우로서, 많은 경우 자연물질로 다양한 성분을 함유하고 있으며, 이외에도 이성질체 및 동족체 화합물로서 확인된다. 두 번째로는 국내 HNS DB의 출처가 다양하여, 정제되지 않은 경우인데 물질정보의 환경조건이 상이하거나 같은 조건에서도 서로 다른 정보가 혼재하는 경우이다. 이러한 문제점을 해결하기 위해, 유럽의 GESAMP에서 제시한 보고서와 미국 CAMEO를 참조하여 누락정보를 확보하였으며 두 데이터베이스의 명명법의 차이에서 오는 누락 정보를 두 데이터베이스의 유사명 자료비교와 화학구조를 이용해 확인하였다. 자연물질과 그룹화합물들도 주요성분의 자료를 활용하였으며, 이성질체의 경우 단일성분의 자료를 기입하거나, 위험성이 높은 성분의 자료를 선택해서 기입하였다. 물질정보 중 IMDG 등급의 경우 주위험성외에 부위험성의 중요성을 고려하여 HNS DB에 새로 기입하였으며, 부록으로 HS 번호 부여 및 해양환경거동분류를 첨부하였다. 향후 아직 남아있는 누락정보의 확보를 위해서는 GESAMP circular report를 확보하도록 할 필요성이 있다고 판단된다.

• Journal of the Korea Convergence Society
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• v.11 no.9
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• pp.91-97
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• 2020

Use of voice-based interfaces that can interact with users is increasing as AI technology develops. To date, however, most of the research on voice-based interfaces has been technical in nature, focused on areas such as improving the accuracy of speech recognition. Thus, the voice of most voice-based interfaces is uniform and does not provide users with differentiated sensibilities. The purpose of this study is to add a emotional factor suitable for the AI interface. To this end, we have derived emotional factors that should be considered in designing voice interface. In addition, we looked at voice trends that differed from country to country. For this study, we conducted interviews with voice industry experts from Finland and Norway, countries that use their own independent languages.

• Journal of the Korean association of regional geographers
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• v.22 no.4
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• pp.774-791
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• 2016

Recent studies on Asian suburbanization suggest that their settlement patterns do not confirm to those of earlier migrant streams, and that different residential patterns of Asian ethnic minority groups have created a complex ethnic mosaic in suburban areas. This paper examines the extent to which residential patterns of main Asian minority groups have changed in Westchester, where is one of suburban counties around New York City. With mapping base on Census of Population data in 2000 and 2010 years, the residential patterns of five Asian groups (Asian Indians, Chinese, Filipinos, Japanese, and Koreans) are analyzed through the indices of segregation. The residential segregation geography of the Asian ethnic groups is characterized by dispersed concentration. There is a difference among the characteristics of the ethnic neighborhoods in which Asian minority groups are residentially concentrated.