• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.450-453
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• 2020

오늘 날 대부분의 대학생들은 물론 직장인들도 노트북을 많이 사용한다. 특히 카페에서 노트북을 사용해 과제를 하는 등 열린 공간에서 노트북을 사용하는 일도 많아지고 있다. 그만큼 노트북도 많은 위협에 노출되고 있다. 사용자가 잠시 자리를 비운 틈에 누군가가 노트북 화면을 몰래 볼 수도 있고, 불건전한 의도로 조작할 수도 있다. 본 논문에서는 이러한 위협에 대응하기 위한 방법을 제안하고자 한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.221-222
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• 2023

본 연구에서는 주피터 노트북에서 자동 평가 시스템을 활용하기 위한 방안으로 자동 평가 시스템의 문제를 저장하고 제시하는 방안에 대해서 연구하였다. 자동 평가 시스템은 학습자가 직접 프로그래밍을 하고 바로 피드백을 받을 수 있는 장점이 있다. 주피터 노트북에서 자동 평가 시스템을 제공하는 nbgrader와 코들의 장점을 바탕으로 문제 제시 방안은 다음과 같다. 문제는 HTML 태그를 이용해 서식 있는 형태로 서버에 저장한다. 주피터 노트북에서 IPython.display 모듈의 display와 HTML 명령어를 사용하여 문제를 출력하면 코드셀 출력창에 서식 있는 HTML 문서를 출력하여 학습자에게 가독성 있게 문제를 제시할 수 있다.

• The Journal of the Acoustical Society of Korea
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• v.21 no.2
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• pp.167-172
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• 2002

The EVRC (Enhanced Variable Rate Codec) is currently in service as a speech cosec in digital cellular systems in North America and Korea. In the EVRC, the LSP (Line Spectral Pairs) related to energy distribution of speech signals in the frequency domain are coded by weighted split vector quantization. Considering that the LSP codebooks might be trained with the language of the develop country of the codebooks or English, it is expected that codebooks trained with Korean provide the performance improvements in the communication in Korean. In this paper, the EVRC LSP codebooks are designed with korean adopting the LBG algorithm based vector quantization, and the performance improvement of the vector quantization and the accompanying speech quality improvement are demonstrated by spectral distortion, SNR and SegSNR measurements, respectively.

• Journal of Digital Contents Society
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• v.13 no.3
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• pp.309-315
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• 2012

Active data are the input data which are changed its membership as Vector Quantization codebook generation algorithm is processed. In the process of VQ codebook generation algorithm performed, the actual active data out of the entire input data will be less presented as the process is performed. Therefore, if we can accurately find the active data and only if we are going to do VQ codebook generation on the active data, then we can significantly reduce the overall generation time. In this paper, we presented the triangle inequality based algorithm to select the active data. Experimental results show that our algorithm is superior to other methods in terms of the VQ codebook generation time.

• Proceedings of the Acoustical Society of Korea Conference
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• 1991.06a
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• pp.54-57
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• 1991

본 논무에서는 HMM과 VQ를 이용한 고립단어에 대한 화자종속 및 화자독립 음성인식시스템을 만들고 여기에 화자적응을 하는 방법에 대한 연구를 했다. 화자적응방법에는 크게 VQ코드북을 적응시키는 방법과 HMM패러미터블 적응시키는 방법이 있다. 코드북적응을 하는 방법으로서 기존코드북에 대해 새로운화자의 적응음성을 양자화한 뒤 각 코드벡터에 해당하는 적응음성의 평균을 구해서 새로운 화자의 코드북을 구해주는 방법과 기준코드북에 대해 새로운화자의 적응음성을 양자화할 때 HMM의 각 상태에서 각각의 코드벡터를 발생할 확률을 거리오차의 계산에서 고려해 비록 거리오차는 크지만 그 코드벡터를 발생할 확률이 매우 높으면 적응음성이 그 코드벡터에 index되게해서 각 코드벡터에 해당하는 모든 적응음성데이타의 평균을 새로운 코드북으로 하는 두가지 알고리즘을 제안한다. 이렇게 함으로써 기존의 기준코드북을 초기 코드북으로해서 LBG알고리즘을 사용해서 적응음성데이타에 대한 새로운 코드북을 만드는 방법에 비해 5-10배의 계산시간을 감소하게 된다. 이 새로운 코드북으로 적응음성데이타를 다시 index해서 이 index된 음성렬로 HMM패러미터를 적응했다. 제안된 알고리즘이 코드북적응을 하는 경우에 기존의 적응방법에 비해 5-10배의 계산 시간을 단축하면서 인식률에서는 더 나은결과를 얻었다. 또 같은 적응방법에 대해서 화자종속모델 보다는 화자독립모델에 대해서 화자적응하는 것이 더 나은 인식결과를 보여주었다.

• The KIPS Transactions:PartD
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• v.9D no.3
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• pp.399-408
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• 2002

Component technology was proposed and applied to software development to overcome software crisis. Software component is a black box like an integrated circuit in hardware but it can not be utilized without good support specially for helping users understand efficiently. This paper shows that data book format for understanding hardware component can be well applied to representing software component. We selected an approach to understand component by matching the contents of data book with UML and API model technique. Besides, we added the architecture part and the interface which are the most important property of software component to the data book for software components. In order to verify effectiveness of components data book we extended batch descriptor in EJB and performed an experiment providing data book to programmers with components.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.5
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• pp.897-907
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• 2013

Since various smart devices are being developed, a growing number of people are reading eBooks instead of paper books. However, people started making eBooks on their own by scanning paper books because there are not enough eBooks provided from market. The term "Bookscan" was made with this reason. The number of bookscan company is increasing because the equipment is too expensive. However, the commercial activity of bookscan company is against copyright law. Also bookscan files are in danger of being illegally distributed on web, because bookscan companies are not protecting copyright. Publication market follows the same procedure with sound market which was collapsed due to copyright problem. Therefore, the technical methods should be prepared for law system against bookscan. The previous ICOP(Illegal Copyrights Obstruction Program) system has been applied to sound and movie files, but not applied to publication. This paper suggests the framework for bookscan file management based on practical mechanism.

• Journal of Digital Convergence
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• v.18 no.12
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• pp.251-258
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• 2020

This study was conducted to understand the dual mediating effect of advertising intrusiveness and advertising attitude on the relationship between Facebook attitude and advertising avoidance on Facebook advertisements. A survey was conducted on 250 male and female students attending M University located in Daejeon, and the result was analyzed with SPSS PROCESS MACRO. First, the result yielded that there is a significant positive correlation between Facebook attitude and advertising attitude, and there is a significant negative correlation between Facebook attitude and advertising intrusiveness and avoidance. There is a significant positive correlation between advertising intrusiveness and advertising avoidance, and there is a significant negative correlation between advertising intrusiveness and advertising attitude. Advertising attitude and advertising avoidance has a significant negative correlation. Second, a complete dual mediating effect was confirmed by investigating the dual mediating effect of advertising intrusiveness and advertising attitude on the relationship between Facebook attitude and Facebook advertising avoidance. Such results profess about the impact of Facebook attitude on the advertising avoidance on Facebook advertisements that advertising intrusiveness and advertising attitude could mediate the decrease in advertising avoidance.

• Journal of Digital Convergence
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• v.11 no.5
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• pp.201-209
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• 2013

This study is an application of facebook (FB) as a strategic communication of viral marketing. Old fashioned advertising and public relation in facebook are not effective at social network service(SNS) environment, and a different marketing communication is needed because facebook is essentially oriented for building relationship among people. The study assumes that an opinion leader might exist at facebook and tries to find out how facebook users show a pattern of communication based on level of opinion leadership regarding a product. The findings showed that people with high opinion leadership communicated more actively than people with low opinion leadership. This study will contribute to segment seed consumers using opinion leadership in facebook.

• The Journal of the Korea Contents Association
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• v.15 no.7
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• pp.449-459
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• 2015

This study examined the associations among self-disclosure tendency, self-activities and friends' responses on Facebook, and perceived usefulness of Facebook in social networking. Sex differences were also examined. Results showed that participants' self-disclosure tendency was positively related to their activities in Facebook, which were strongly related to friends-activities. Self- and friends-activities significantly increased usefulness in social networking. Regarding sex differences, the relationships between self-disclosure tendency and self-activities and between self-activities and usefulness were stronger for men, while the relationship between friends-activities and usefulness was stronger for women. These results suggest women tend to value friends' responses more in assessing relational qualities than men in Facebook contexts.