• Title/Summary/Keyword: 디지털 정보환경

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A Study on the Standardization of JPEG Format as a Long-Term Preservation Master File for Paper Archives in the Central Archives of Korea (중앙기록물관리기관의 종이기록물 영구보존용 마스터 파일로서 JPEG 포맷의 표준화에 대한 연구)

  • Kang, HyenMin
    • Journal of Korean Library and Information Science Society
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    • v.47 no.4
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    • pp.489-510
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    • 2016
  • It is defined in the internal standard of the NAK namely a NAK/G8-1:2013(v.1.) such as TIFF, PNG, PDF/A, JPEG 2000 as a Long-Term Preservation Master File for internal Standardization of Paper Archives in the Central Archives of Korea. This study reviewed the possibility that JPEG format could be a standard as a Long-Term Preservation Master File for internal Standardization of Paper Archives in the Central Archives of Korea. I pointed to the unique characteristics of JPEG file format and analysed and compared with TIFF format that is a representative master file. Through this study, I suggested that JPEG format also should be additionally included in the standard, as a master file, because it meets a qualification and functional requirements of master file and can guarantee the authenticity, reliability, integrity and usability. The meaning of this study is that JPEG format, be added to master file standard, can set up a environment that has lots of benefit in the domain of usability, compatibility to user as well as the authenticity, reliability, integrity.

A Study on Anonymous Electronic Prescription based on RSA Cryptosystem (RSA 기반의 익명 전자처방전에 관한 연구)

  • Chung, Chan-Joo;Yun, Jung-Mee;Won, Dong-Ho
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.47 no.4
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    • pp.51-62
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    • 2010
  • This paper proposes RSA cryptosystem based anonymous electronic prescription which is issued from university and local hospitals by authorized medical professionals. Electronic prescription is now being used in domestic hospitals where sharing medical records and images are prevailing, facilitated by digitalizing medical information and building network infrastructure between the institutes. Proposed RSA based anonymous electronic prescription makes use of PKI protects the identity exposure of doctors and privacy of patients. While traditional prescription fails to protect identities to mandates party or to health insurance, the proposed RSA based prescription opens the contents of the prescription to health insurance authority only after its prescribing function is finished. The proposed approach along with soon to be deployed electronic ID card will help national health insurance corporation to increase the transparency of national prescription system.

The Comparison of the Adaptive Equalization Performance in MCMA Algorithm by the Weighting Factor (MCMA알고리즘에서 weighting factor에 의한 적응 등화 성능 비교)

  • Lim, Seung-Gag
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.10 no.4
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    • pp.137-143
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    • 2010
  • This paper deals with the performance comparison of self adaptive equalizer by the weighting factor of MCMA cost function for the compensate the amplitude and phase distortion which occurs in the communication channel. The MCMA is improves the cost function of present CMA at the output of equalizer for the minimize of error function in the amplitude and phase, the value of weighting factor is used at this time. When the comparison of equalizer performance, we classified to initial state and steady state, then it represents the convergence time and convergence speed and steady state operation of equalizer to the predetermined level, it is determined by the weighting factor. We confirm to the different result to this 2 state by weighting factor values using computer simulation. By using the result of this paper, if we appropriately choose the weighting factor values in the environment of communication channel, it is expected that the high quality digital transmission is possible.

A Study on the Design of IoT-based Thermal Sensor and Video Sensor Integrated Surveillance Equipment (IoT 기반 열상 센서와 영상 센서 일체형 감시 장비 설계에 관한 연구)

  • Lee, Yun-Min;Shin, Jin-Seob
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.19 no.6
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    • pp.9-13
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    • 2019
  • In this paper, IoT based thermal sensor data and image sensor integrated environmental monitoring system for ship, and it is the monitoring system which can process and transmit the Full HD IP camera image and thermal data transmitted from the thermal module for processing and transmitting, and the viewer S/W is to be developed which provides in real time the information for actual surrounding temperature together with the image, and enables fire prediction which was impossible in the case of the existing equipment by estimating the temperature change as the thermal image is added to the image camera, and saves and analyzes all data while receiving the temperature data and image signal transmitted from the integrated thermal sensor environmental monitoring equipment for ship and displaying them as 2D on the monitoring system.

Secret Sharing Scheme using Gray Code based on Steganography (스테가노그라피 기반에서 그레이코드를 사용한 비밀공유 기법)

  • Kim, Cheon-Shik;Yoon, Eun-Jun;Hong, You-Sik;Kim, Hyoung-Joong
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.46 no.1
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    • pp.96-102
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    • 2009
  • Due to the rapid growth of the Internet, it is possible to distribute the digital content efficiently. However, the need for image data protection and secret communication technique is also on the rise because of an infringement of the copyright by malicious attackers. Shamir and Lin-Tsai proposed simple secret image encryption algorithms based on the principle of secret sharing, respectively. However, their secret sharing schemes have a serious problem which can be declined the image quality and it is possible for third party to know embed information. In this paper, we propose a new secret sharing scheme using gray code that can be increased the image quality and security. As a result of our experiment, the proposed scheme is not only shown of good image quality and but also provide enhanced security compare with Shamir and Lin-Tasi's schemes.

Development of Underwater Acoustic Micro Modem for Real-Time Monitoring of Underwater Environment and Ecosystem (수중 환경 및 생태 실시간 모니터링을 위한 초소형 수중 음향통신 모뎀 개발)

  • Jeon, Jun-Ho;Park, Sung-Joon
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.48 no.6
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    • pp.97-108
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    • 2011
  • Systems for underwater environment monitoring and natural resources can be considered as a part of digital convergence where real-time data transmission is possible with the help of underwater wireless sensor network (UWSN). One of key technologies required for the deployment of the systems is underwater acoustic micro modem. In this work, we design and implement an acoustic modem equipped with a commercial omnidirectional transducer. We also make experiments at the northern Han river for the verification of the developed modem. According to the experiments, the modem supports the working distance of 250 m and the data rate of 200 bps with a negligible bit error rate. It is expected that the acoustic modem can be used for various applications based on UWSN in a near future.

Development of Precision Measuring Systems for Structural Deformation Measurements (구조물 변형관측을 위한 정밀측량시스템의 개발)

  • 김병국;최정민
    • Spatial Information Research
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    • v.7 no.1
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    • pp.63-79
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    • 1999
  • In this research, the operational principle and the internal algorithm of theodolite measuring systems are studied and coded for a new software, and the feasibility of the laser system for the above mentioned usage is studied by simulation set-up of the system in the laboratory environment, and for the theodolite system modules for the communication between theodolite and computer is implemented, the data collection and storage, the simultaneous photogrammetric ' bundle ' adjustment for the theodolite position and the target points are coded, compiled and tested. for the simulation set-up of the laser system extensive studies on laser sources and laser detectors are performed, the system composition for the system simulation in the laboratory environment is studied and implemented, and the beam fluctuation due to the environmental changes in the course of the laser beam, such as changes in current of wind or in temperature is experimented. According to Experiment on the Source of 17 meters interval and the Detector, Laser beam is almost doesn't depend on air How, but it is effected by variations of temperature and light. Selecting cloudy day and time without change of temperature, it was realized that it is possible to perform deformation measurement more than approximately 2mm precision.precision.

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Energy and Statistical Filtering for a Robust Audio Fingerprinting System (강인한 오디오 핑거프린팅 시스템을 위한 에너지와 통계적 필터링)

  • Jeong, Byeong-Jun;Kim, Dae-Jin
    • The Journal of the Korea Contents Association
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    • v.12 no.5
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    • pp.1-9
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    • 2012
  • The popularity of digital music and smart phones led to develope noise-robust real-time audio fingerprinting system in various ways. In particular, The Multiple Hashing(MLH) of fingerprint algorithms is robust to noise and has an elaborate structure. In this paper, we propose a filter engine based on MLH to achieve better performance. In this approach, we compose a energy-intensive filter to improve the accuracy of Q/R from music database and a statistic filter to remove continuity and redundancy. The energy-intensive filter uses the Discrite Cosine Transform(DCT)'s feature gathering energy to low-order bits and the statistic filters use the correlation between searched fingerprint's information. Experimental results show that the superiority of proposed algorithm consists of the energy and statistical filtering in noise environment. It is found that the proposed filter engine achieves more robust to noise than Philips Robust Hash(PRH), and a more compact way than MLH.

Usability evaluation of image search methods for mobile phone (휴대폰 사진 검색 기능의 사용성 평가)

  • Lee, Yu-Jin;Han, Sung-H.;Cho, Young-Seok;Kim, Jong-Seo
    • 한국HCI학회:학술대회논문집
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    • 2006.02b
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    • pp.197-202
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    • 2006
  • 본 연구에서는 휴대폰에서의 효과적인 사진 검색을 지원하기 위해 사진 정보를 이용한 검색 기능을 개발하고, 이의 사용성 평가 실험을 수행함으로써 개발된 검색기능의 효용성을 검증하였다. 본 연구에서 개발한 사진 검색 기능은 크게 날짜 검색기능과 키워드 검색 기능의 두 가지로 구분된다. 날짜 검색 기능은 입력한 날짜에 해당하는 사진이 포함된 화면을 사용자에게 제시하는 방식이며, 키워드 검색 기능은 사용자가 입력한 키워드가 포함된 파일 이름을 갖는 사진을 검색하여 그 결과를 제시하는 방식이다. 개발된 검색 방식과 기존의 사용자 조작에 따른 화면 네비게이션을 통한 검색 방식을 대상으로 사용성 평가 실험을 수행하였다. 또한, 휴대폰에 저장된 사진 장수에 따른 작업의 수행도 및 주관적 만족도를 비교 분석하기 위하여, 120, 240, 360 장의 사진을 저장하고 있는 프로토타입을 개발하여 사용성 평가 실험에 활용하였다. 사용성 평가 실험 결과, 사진 장수가 120, 240 장일 경우는 날짜 검색과 키워드 검색의 두 방식이 검색 편의성, 기능의 적합성, 전반적 만족도 등의 주관적 만족도 측면에서 기존 검색 방식에 비하여 우수한 사용성 수준을 갖는 것으로 분석되었다. 사진 장수가 360 장인 경우, 날짜 검색과 키워드 검색의 활용시 검색 편의성, 기능의 적합성, 전반적 만족도가 기존 검색 방식에 비하여 우수한 성능을 갖는 것으로 분석되었고, 특히, 키워드 검색을 활용한 경우 검색 시간이 기존 검색과 날짜 검색을 활용한 경우에 비하여 우수한 성능을 갖는 것으로 확인되었다. 본 연구는 화면 크기가 작고 입력 방식이 제한된 휴대폰 인터페이스 환경에서 효과적인 사진 검색방식을 제안하고 검증하였다는 데 의의를 가진다. 본 연구 결과는 휴대폰 메뉴 검색, 일반 파일 검색 뿐만아니라 디지털 카메라의 사진 관리 기능에도 응용될 수 있을 것으로 기대된다.

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Development of Interactive Media Player for Kiosk with User Motion Detection (사용자 모션 인식 기반 키오스크 전용 인터랙티브 미디어 플레이어 개발)

  • Song, Bok Deuk;Kim, Hyeong-Jin;Jeong, Hyeon-Jae;Choi, Yeon Jun
    • The Journal of the Korea Contents Association
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    • v.19 no.11
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    • pp.270-277
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    • 2019
  • These days, with the advent of digital broadcasting, media environment offers users an opportunity to enjoy differentiated contents in a more aggressive fashion through user-media interactions based on computer technology. In fact, the development of contents which can induce spontaneous acts from users such as outdoor ads which use certain sensors and devices and exhibition halls has been active. With the development of low-price motion recognition devices, people have been able to enjoy diverse interaction-applied media by recognizing users' motion data without body contact. In this paper, we developed an interactive media player that can recognize the user's motion and control the video in the web service environment without installing a specific program. In addition, we set user motion recognition range and developed a user motion recognition algorithm suitable for the Leap Motion equipment installed in the kiosk. The results of this study can be experienced by various interactive media such as interactive tourism, education, and movie contents in kiosks that can be installed in public places.