• Title/Summary/Keyword: 디지털 정보환경

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Noise Changes in Image Plate (시간변화에 따른 영상판의 노이즈 변화)

  • Choi, Seokyoon;Im, In-Chul
    • Journal of the Korean Society of Radiology
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    • v.12 no.2
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    • pp.271-275
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    • 2018
  • It is possible to do not use the Image Plate for a long time in the clinic. for the acquisition of reliable images the decommissioning process is very important. In this study, we would like to look at complex noises that may occur during Image Plate use depending on the frequency and time of day. first, we got the image from computer radiography. second, We calculate the noise changes using Peak Signal to Noise Ratio(PSNR) and Noise Power Spectrum(NPS). finally, we suggest that remove the noise from the IP for more than 4 hours. and It turned out to be better to remove the noise more than once. this study will be a quantitative reference for Image Plate management and use in the clinical trial.

A Study on Cockpit Voice Command System for Fighter Aircraft (전투기용 음성명령 시스템에 대한 연구)

  • Kim, Seongwoo;Seo, Mingi;Oh, Yunghwan;Kim, Bonggyu
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.41 no.12
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    • pp.1011-1017
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    • 2013
  • The human voice is the most natural means of communication. The need for speech recognition technology is increasing gradually to increase the ease of human and machine interface. The function of the avionics equipment is getting various and complicated in consequence of the growth of digital technology development, so that the load of pilots in the fighter aircraft must become increased since they don't concentrate only the attack function, but also operate the complicated avionics equipments. Accordingly, if speech recognition technology is applied to the aircraft cockpit as regards the operating the avionics equipments, pilots can spend their time and effort on the mission of fighter aircraft. In this paper, the cockpit voice command system applicable to the fighter aircraft has been developed and the function and the performance of the system verified.

A Study on Project Resource & Information Management with Internet Application(PRIMA system) (디지털 정보화를 통한 현장 자원 및 정보관리 기술에 관한 연구(PRIMA 시스템))

  • Kim Oe-Gon;Lee Dong-Ryul
    • Korean Journal of Construction Engineering and Management
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    • v.2 no.1 s.5
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    • pp.88-97
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    • 2001
  • The Internet, the main issue of a new millennium, is being researched vitally for the progress of the construction industry, and the construction industry is considered to be led into a high-value added state-of-arts technology industry through CALS. Even if many construction companies gradually widen the use of the Internet for various purposes such as an electronic bidding system and an e-commerce system, the companies are still demanded to use the Internet more broadly and practically. Hence, the need for a tool for fast decision making and an effective construction management has risen. The PRIMA system has been developed specifically focused on meeting with those recent changes of the construction industry. This system is composed of three parts. Those are Just In Time(JIT) management, integrated application of man powersafetywork management and decision making process based on real-time information in the Internet. The usefulness of the PRIMA system has already been proved in a super-scale construction project. As the Internet environment get improved the use of the tool will be spread out gradually for many construction projects, regardless their size and location.

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The Study of Making Interface for Text to Image (텍스트를 이미지화하기 위한 Interface 제작에 관한 연구 -작품 "Yesterday to Today"를 중심으로-)

  • Lee, Woo-Hyun;Lee, Sung-Young;Kim, Kyu-Jung
    • 한국HCI학회:학술대회논문집
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    • 2007.02c
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    • pp.194-198
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    • 2007
  • 본 연구의 주제는 텍스트를 어떻게 회화적이미지로 전환시킬 수 있을까?에 대한 것이다. 오늘날 디지털 환경 속에 있는 우리는 이미지 중심의 세계 속에 살고 있다. 과거 텍스트가 해왔던 정보의 생산과 전달 그리고 저장의 역할을 오늘날은 상당부분 이미지가 하게 되었다. 하지만 그럼에도 불구하고 아날로그 방식과 정서는 여전히 우리 곁에 남아있는 것도 사실이다. "Yesterday to Today"는 문자의 최소 단위인 알파벳을 통하여 이미지를 재현하려는 작품이다. 이 작품은 크게 두 가지 Idea로 이루어지는데 하나는 복수개의 실시간 영상 소스를 이용하여 이미지를 구성해내는 것과, 다른 하나는 텍스트에 의한 이미지의 변환이다. 복수개의 실시간 영상 소스는 프로그램이 작동하는 컴퓨터와 직/간접적으로 연결되어 전달되는데, 직접적으로 연결되어 근거리의 특정한 지점으로부터 영상 소스를 받을 수 있고, 또 하나의 방법은 인터넷을 통한하나 이상의 원거리 지점으로부터 보내어지는 영상을 조합하여 받을 수 있다. 프로그램 구현 개념은 픽셀 소스 카메라에서 캡쳐된 최초 이미지를 명도, 색상, 채도로 분류하고, 이것의 각각을 26개의 구간-자판의 개수에 의하여 정해짐-으로 나누고, 다시 그 각각의 구간을 26단계로 나눈다. 이렇게 나누어진 구간들은 알파벳과 1:1로 대응시켜 결과이미지의 해당 부분을 수치대로 재현하도록 프로그램 시킨다. 이미지의 부분들을 지정하기 위하여 특정한 텍스트로부터 알파벳의 빈도수를 조사했는데, 이 조사를 바탕으로 빈도수의 많고 적음에 따라 이미지부분들이 26개 구간으로 정해졌다. 이미지 재현 방법은 사용자가 모니터 위의 Result Image Cam을 통하여 얻고자 하는 이미지를 캡쳐한 후, 특정한 텍스트를 타이핑하면 이미지를 재현할 수 있는데, -입력된 텍스트의 알파벳은 프로그램이 지정한 HSI 컬러 모델의 영역과 1:1로 대응하게 하였다-이 이미지는 특정 장소에 실시간으로 받아진 영상을 데이터화 한 소스에 의하여 만들어진다. 이미지를 재현할 때 텍스트에 따라 알파벳 빈도수는 달라질 수 있으므로 비록 최초 이미지가 동일할지라도 얻고자하는 결과 이미지가 달라진다. 그러므로 사용자는다양한 창조적 경험을 할 수 있다.

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Application of Geophysical Prospecting to Site Assessment of Waste Landfill (매립지 오염평가를 위한 물리탐사의 적용사례)

  • Lee, Cheol-Hyo;Park, Sam-Gyu
    • 한국지구물리탐사학회:학술대회논문집
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    • 2001.09a
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    • pp.104-121
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    • 2001
  • Recently, the pollution of soil and groundwater becomes a serious social problem, and geophysical exploration methods have been introduced as a remedial investigation method of subsurface. Digital technologies such as personal computer have revolutionized our ability to acquire large volume of data in a short term, and to produce more reliable results for subsurface image. Also, color graphics easily visualizes the survey results in a more understandable manner, and it is widely used for not only characterizing the contaminated subsurface but also monitoring contaminant and remedial process. In this paper, electrical resistivity and electromagnetic (EM) surveys were carried out in order to understand characteristics of waste landfills, and the applicability of geophysical prospecting to site assessment of waste landfill was also tested. According to the result, electrical resistivity and electromagnetic (EM) surveys were effective in estimating distribution of the leachate plume.

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Phase Tracking for Orthogonal Frequency Division Multiplexing Systems (직교 주파수 분할 다중화 시스템을 위한 위상 오차 추적)

  • Jeon, Tae-Hyun
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.12 s.354
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    • pp.61-67
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    • 2006
  • This paper proposes the algorithm for tracking of the residual phase errors incurred by carrier frequency offset and sampling frequency offset in the orthogonal frequency division multiplexing (OFDM) systems which are suitable for high data rate wireless communications. In the OFDM systems the subcarriers which are orthogonal to each other are modulated by digital data and transmitted simultaneously. The carrier frequency offset causes degradation of signal to noise ratio(SNR) performance and interference between the adjacent subcarriers. The errors in the sampling timing caused by the sampling frequency difference between the transmitter and the receiver sides also cause a major performance degradation in the OFDM systems. The residual error tracking and compensation mechanism is essential in the OFDM system since the carrier and the sampling frequency offset cause the loss of orthogonality resulting in the system performance loss. This paper proposes the scheme where the channel gain and the payload data information are reflected in the residual error tracking process which results in the reduction of the estimation error and the tracking performance improvements under the frequency selective fading wireless channels.

Device Identification System for Corporate Internal Network Visibility in IoT Era (IoT 시대 기업 내부 네트워크의 가시성 확보를 위한 단말 식별 시스템 설계)

  • Lee, Dae-Hyo;Kim, Yong-Kwon;Lee, Dong-Bum;Kim, Hyeob
    • Convergence Security Journal
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    • v.19 no.3
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    • pp.51-59
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    • 2019
  • In this paper, we propose a device identification system for network visibility that can maintain the secure internal network environment in the IoT era. Recently, the area of enterprise network is getting huge and more complicated. Not only desktops and smartphones but also business pads, barcode scanners, APs, Video Surveillance, digital doors, security devices, and lots of Internet of Things (IoT) devices are rapidly pouring into the business network, and there are highly risk of security threats. Therefore, in this paper, we propose the device identification system that includes the process and module-specific functions to identify the exploding device in the IoT era. The proposed system provides in-depth visibility of the devices and their own vulnerabilities to the IT manager in company. These information help to mitigate the risk of the potential cyber security threats in the internal network and offer the unified security management against the business risks.

Effectiveness of e-Sports Online Training Program for Relieving Youth Game Over-flow: Focusing on 'Online LoL(League of Legends) Game School' (청소년 게임 과몰입 해소를 위한 e-스포츠 온라인 수련활동 프로그램 효과성 연구 : '온라인 롤(League of Legends: LoL) 게임학교'를 중심으로)

  • Choi, Junghye Fran;Bang, Seungho
    • Journal of Korea Game Society
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    • v.21 no.5
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    • pp.133-142
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    • 2021
  • This study investigated the effectiveness of 'League of Legends (LoL) game school', an e-sports online training program for relieving youth game over-flow. The Seoul Metropolitan Office of Education's Student Education Institute ran the program. Through this study, it was found that various activities to learn an e-sports game professionally and to explore career paths regarding game had positive effects on students' affections and intrinsic motivation. This study may contribute to helping youth as generation Z understand a healthy game culture.

A Case Study on the Effects of Online Lifelong Education at Home Using Contents of Lifelong Education Center Attached to the University on the Acquisition and Generalization of Cooking Task Skills of the Persons with Developmentally Disabilities (대학부설 평생교육원 콘텐츠를 활용한 가정 내 온라인 평생교육이 발달장애인의 조리직무기술 습득 및 일반화에 미치는 효과)

  • Kim, Young-Jun;Kwon, Ryang-Hee
    • Journal of Convergence for Information Technology
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    • v.11 no.8
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    • pp.137-150
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    • 2021
  • This study The purpose of this study was to investigate the effects of online lifelong education in a home using contents of university-affiliated lifelong education center on the acquisition and generalization of cooking task skills for persons with developmental disabilities. The subjects of this study were three persons with developmental disabilities who lived with their parents in the home without employment after graduation from school. The research design and method used the technique of multiple probe design across subjects during the single subject research. As a result of the study, the three persons with developmental disabilities who participated in the study effectively acquired cooking task skills through online lifelong education in the home using contents of university-affiliated lifelong education center, and generalized the performance of cooking task skills in the actual restaurant environment, not at home.

Internet of Things and Innovative Media Firms (사물인터넷과 미디어기업의 혁신)

  • Moon, Sanghyun
    • Journal of the Korea Convergence Society
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    • v.10 no.6
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    • pp.157-164
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    • 2019
  • This research examines how IoT makes a significant contribution to the innovation of media firms. The media firms will be able to find new reveue sources and strengthen firms' competence through innovating product, process and business model. While IoT increases the experience of interactivity and immersion for consumption, it improves the way ads are exposed and its impact is measured, leading to revenue increase. For these benefits fulfilled, innovation friendly media eco-system must be established. It is the most critical that media firms should change skeptical attitude toward IoT's potential and actively invest it to employ IoT. The government should create regulatory framework to best utilize the innovative advantages of IoT.