• Journal of Information Management
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• v.40 no.1
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• pp.47-67
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• 2009

Digital literacy is an important factor in the discourses on the knowledge sharing on the campus. This article analyzed the impact of digital literacy of knowledge-sharing capabilities in the university. As a result, digital literacy was found to significantly affect student knowledge-sharing capabilities in the university studied. Results show that video and animation literacy is the most influential factor and image literacy is the second-most influential factor for student knowledge-sharing. Those results can be used as a framework for developing digital literacy program.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2018.06a
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• pp.285-287
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• 2018

최근 우리나라에서도 지진이 발생하는 등 각종 재난의 발생 빈도가 증가하고 있어 이에 대비하는 사회적 필요성이 대두되고 있다. 특히, 재난발생 시 일반 대중들에 전달되는 경보와 방송에 대한 관심이 높아지고 있다. 국내 재난경보방송시스템은 오랜 역사를 거쳐 정부와 지자체가 관심을 가지고 구축해 왔으며, 인구가 밀집되어 있는 장소나 여름철 집중호우가 예상되는 유원지 등에 집중적으로 설치되어 있다. 옥외를 중심으로 경보방송을 서비스하고 있었으나 건물 내부에는 경보나 방송이 전달되지 못하여 재난발생 시 대규모 피해가 예측되므로 옥내경보방송 서비스의 필요성이 중요하게 인식되었고 최근에는 지자체 별로 활발하게 시스템 설치가 진행되고 있다. 옥내경보방송은 구내방송시설인 전관방송시스템과 연계되어 서비스하는 방향으로 진행되고 있으며 본 저자도 이에 동의하는 바이다. 그러나 전관방송시스템은 오랜 동안 이와 같은 필요성이 없는 상태에서 구축되어 왔고 제조사 별로 외부장비의 연계 방식에 대하나 규격이 다르게 발전해 왔다. 따라서 옥내경보방송장치와 전관방송시스템을 연계하기 위해서는 장비의 제어와, 오디오 인터페이스(interface)가 필수적 요소이므로 이를 반드시 연계하여야 한다. 본 논문에서는 옥내경보방송장치와 전관방송시스템들의 인터페이스를 위해 문제점들을 분석하고 이들의 개선방안에 대해 연구한다. 또한 연계 규격의 표준화에 대한 필요성을 강조하여 각 제조사들이 연계 규격을 준수하고 보다 많은 국민들이 재난경보방송 서비스를 누릴 수 있도록 제언한다.

• The Transactions of the Korea Information Processing Society
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• v.7 no.12
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• pp.3885-3895
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• 2000

The emergence of digital imaging and digital networks has made duplication of original artwork easier. In order to protect these creations, new methods for signing and copyrighting visual data are needed. In the last few years, a large number of schemes have heen proposed for hiding copyright marks and other information in digital image, video, audio and other multimedia objects. In this paper, we propose a technique for embedding the watermark of visually recognizable patterns into the frequency domain of images. The embedded watermark can be retrieved from the decoded sequence witbout knowledge of the original. Because the source image is not required to extract the watermark, one cannot make the fake original that is invertible to watermarking scheme from the waternlarked image. In order to recover the embedded signature data without knowledge of the original, a prediction of the original value of the pixel containing the information is needed. The prediction is based on a averaging of amplitude values in a neighborhood around the pixel itself. Additionally the projxJsed technique could survive several kinds of image processings including JPEG lossy compression.

• Journal of Information Technology Application
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• v.3 no.4
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• pp.43-62
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• 2001

Time variable has been one of the most important ones to explain consumer behavior. Time-pressure could give some impact on decision making process, consuming process of goods, the frequency of purchasing activities and their behavior about after service. It is widely accepted that on-line shopping through Internet can overcome the time and space limitations consumers usually meet for their shopping activities. If that concept is true, on-line shopping through Internet might be an attractive way for those who feel high time pressure for their shopping activities. To test the impact of time pressure on consumer behavior at Electronic Commerce, this paper set three hypothesis. Questionnaire were distributed to married women around Taejon. Sample size were 73, 39 of which from women who have job, 34 who don't have job. The result of this paper might shed some light on the policy making to develop Internet shopping malls.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.3
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• pp.541-548
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• 2017

The smartphone operates the media server daemon to handle audio service requests. Media server daemons, running with a high privilege in the background, caused many vulnerabilities to applications most frequently used in smart devices including smartphones. Fuzzing is a popularly used methodology to find software vulnerabilities. Unfortunately, fuzzing itself is not much effective in such format-strict environments as media services. In this paper, we propose a file format-aware fuzzing in order to efficiently detect vulnerabilities of media server daemon. We acquired a remote arbitrary code execution vulnerability on iOS/tvOS/MacOS/watchOS, and we verified the effectiveness by comparing our methodology with the fuzzers FileFuzz and ZZUF.

• Journal of Intelligence and Information Systems
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• v.27 no.2
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• pp.17-32
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• 2021

Speaker recognition is generally divided into speaker identification and speaker verification. Speaker recognition plays an important function in the automatic voice system, and the importance of speaker recognition technology is becoming more prominent as the recent development of portable devices, voice technology, and audio content fields continue to expand. Previous speaker recognition studies have been conducted with the goal of automatically determining who the speaker is based on voice files and improving accuracy. Speech is an important sociolinguistic subject, and it contains very useful information that reveals the speaker's attitude, conversation intention, and personality, and this can be an important clue to speaker recognition. The final ending used in the speaker's speech determines the type of sentence or has functions and information such as the speaker's intention, psychological attitude, or relationship to the listener. The use of the terminating ending has various probabilities depending on the characteristics of the speaker, so the type and distribution of the terminating ending of a specific unidentified speaker will be helpful in recognizing the speaker. However, there have been few studies that considered speech in the existing text-based speaker recognition, and if speech information is added to the speech signal-based speaker recognition technique, the accuracy of speaker recognition can be further improved. Hence, the purpose of this paper is to propose a novel method using speech style expressed as a sentence-final ending to improve the accuracy of Korean speaker recognition. To this end, a method called sentence sequencing that generates vector values by using the type and frequency of the sentence-final ending appearing in the utterance of a specific person is proposed. To evaluate the performance of the proposed method, learning and performance evaluation were conducted with a actual drama script. The method proposed in this study can be used as a means to improve the performance of Korean speech recognition service.

• The Journal of the Korea Contents Association
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• v.20 no.11
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• pp.644-655
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• 2020

The study examined differences between perceptions of AI speakers and intention to continuous use of AI speakers according to usage function. We divided usage patterns into single- and multi-function orientations based on the usage by different functions of audio content (music, news, and search), and analyzed the differences between perceptions of using AI speakers and the intention to continuous use. 335 men and women who had experience using AI speakers participated in an online survey. Results are as follows. First, men used AI speakers mainly for acquiring news, and the extent to which 20s and 40s acquire news was different. Second, perceptions of usefulness and ease of use were found to be higher in the multi-functional group(music-news-search). Last, regarding the intention to continuous use of AI speakers, the multi-functional group was highest, and users focusing on music listening were relatively higher than users for other functions. The findings of the study are expected to be used as foundational data for expanding the use of AI speakers and developing strategies for service provision in each AI speaker brand.

• Journal of the Korean Society for information Management
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• v.38 no.1
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• pp.25-51
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• 2021

In this study, we tried to provide basic materials necessary for introduction of smart libraries by analyzing present conditions of its operation based on the actual conditions of digital materials. For this study, a survey of actual use of digital materials is conducted for digital material rooms of public libraries in nationwide and 213 persons in charge of digital materials. As a result of this study, the followings are found: first, 80.8% of those public libraries responding to the survey operate digital material rooms and average 1.75 person is in charge of managing digital materials and open type Wi-Fis are installed in those public libraties but only 11.3% of those libraries provide 5G services; second, it is found that the digital data which are owned by those public libraries most are video contents (63.8%), e-books (53.5%) and audio books (53.5%) in order. In addition average number of types of audio books 781, video contents 4,985, nonbook contents except for video 3,616 and other digital data 626. This study is a basic research for introduction of smart library and it is necessary to conduct another study of a plan for future revitalization of digital materials and librarians' awareness on introduction of smart library.

• The KIPS Transactions:PartD
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• v.11D no.2
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• pp.443-452
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• 2004

The paper presents an intelligent space management system for ubiquitous computing. The system is basically a home/office automation system that could control light, electronic key, and home appliances such as TV and audio. On top of these basic capabilities, there are four elegant features in the system. First, we can access the system using either a cellular Phone or using a browser on the PC connected to the Internet, so that we control the system at any time and any place. Second, to provide more human-oriented interface, we integrate voice recognition functionalities into the system. Third, the system supports not only reactive services but also proactive services, based on the regularities of user behavior. Finally, by exploiting embedded technologies, the system could be run on the hardware that has less-processing power and storage. We have implemented the system on the embedded board consisting of StrongARM CPU with 205MHz, 32MB SDRAM, 16MB NOR-type flash memory, and Relay box. Under these hardware platforms, software components such as embedded Linux, HTK voice recognition tools, GoAhead Web Server, and GPIO driver are cooperated to support user-friendly intelligent space.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.34 no.4
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• pp.183-205
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• 2023

This study was conducted to identify the operation status of Dobong-gu public libraries in order to establish a mid- to long-term development plan for Dobong-gu libraries, and to analyze local residents' perceptions of libraries by factors through user surveys to suggest specific development plans for Dobong-gu libraries. Overall, the satisfaction level of Dobong-gu residents with library services was found to be high, and all libraries were analyzed to be providing high-quality services. From this, the following operational strategies for the mid- to long-term development plan of Dobong-gu public libraries can be derived. First, libraries need to continue to collect and provide books that meet the quantitative and qualitative levels to satisfy the needs of the community and users. Electronic and online materials, including e-books and audiobooks, as well as subject-specific materials should be expanded to provide relevant programs. Second, although Dobong-gu is an aging city, a wide range of age live there, so there is a need to promote communication and understanding between generations and promote integration of the community through a generational empathy program. Third, it is necessary to remodel and improve the space of aging libraries by organizing library facilities and environments into open spaces and creating makerspaces and multicultural spaces for direct experience and practice, reflecting the latest trends in library space organization.