• Title/Summary/Keyword: Digital Indicator

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Development of evaluation system and Importance analysis of U-safe city (U-안전도시 평가체계 개발 및 중요도분석)

  • Kang, Soon-Bong;Kwon, Chang-Hee
    • Journal of Digital Convergence
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    • v.11 no.11
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    • pp.15-27
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    • 2013
  • The purpose of this study is to develop the evaluation system of which the city safety can be realized in the U-City. The evaluation system on "how much safe the present city is" and "how much safe it will be in the future" has been selected and the criticality has also been analyzed. The result of criticality analysis is that the indicator for "how safe the current city is" showed that the disaster prevention and environmental field are important. In the future, the indicator of possibility for the U-safe city should be prepared by the imtegrative operation management system, and on the basis of this, it also showed that the necessary indicator to build the system for keeping the safe city is important. The evaluation system for the U-safe city, hereafter, can be utilized for the city plan, construction, operation, and management utilized by IT in local government.

A Study on Development of Digital Curation Maturity Models and Indicators: Focusing on KISTI (디지털 큐레이션 성숙도 모델 및 지표 개발에 관한 연구: 한국과학기술정보연구원 디지털큐레이션센터를 중심으로)

  • Seonghun, Kim;Suelki, Do;Sangeun, Han;Jayhoon, Kim;Seokjong, Lim;Jinho, Park
    • Journal of the Korean Society for information Management
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    • v.39 no.4
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    • pp.269-306
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    • 2022
  • This study aimed to develop indicators that can measure the digital transformation performance of science and technology information construction and sharing systems by utilizing the Digital Curation Maturity Models. For digital transformation, it is necessary to consider not only simple service improvement but also organizational and business changes. In this study, we aimed to develop a model for measuring the digital transformation of KISTI, Korea's representative science and technology information service organization. KISTI has already carried out BPR work for digital transformation and borrowed the concept of a maturity model. However, in BPR, there is no method to measure the result. Therefore, in this paper, we developed an index to measure digital transformation based on the maturity model. Indicator development was carried out in two ways: model development and evaluation. Cases for model construction were made through a comprehensive review of existing KISTI and various domestic and foreign cases. The models before verification were technology (37), data (45), strategy (18), organization (36), and (social)influence (14) based on the major categories. After verification using confirmatory factor analysis, the model is classified as technology (20 / 17 indicators dropped), data (36 / 9 indicators dropped), strategy (18 / maintenance), organization(30 / 6 indicators dropped), and (social) influence (13 indicators / 1 indicator dropped).

An Assessment of the Accuracy for Digital Radiography Image (디지털 방사선투과영상의 정밀성 평가에 관한 연구)

  • Park, Sang-Ki;Ahn, Yean-Shik;Gil, Doo-Song
    • Journal of Welding and Joining
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    • v.27 no.2
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    • pp.51-56
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    • 2009
  • Film based radiography imaging technique has been applied to the non-destructive test in medical, aircraft, and power industries contributing to the development of the industries. However, the complex process for imaging and analysis has increasingly demanded the reformation of the radiography test. A digital radiography imaging technologies has been com out from the demand. This study was mainly focused on the assessment on the accuracy for the each image from digital radiography test and film radiography test was proven to crate a better image in sensitivity than film radiography test. In the IQI(Image quality indicator) transmission test, one or two more line can be seen in digital image than in film image. When applying to the boiler tube weld, film image is detectable to the 1.0mm depth flaw; and digital image to the 0.5mm depth flaw. As a result of this study, digital radiography technology is determined to enhance the image quality, compared to film radiography technologies

The Study on Image Sensitivity Evaluation For Digital Radiography Image (디지털 방사선 투과영상의 식별도 평가 연구)

  • Park, S.K.;Lee, Y.H.
    • Journal of Power System Engineering
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    • v.12 no.6
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    • pp.70-77
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    • 2008
  • The purpose of this study is to compare the quality of digital radiography image with that of classical film images for welded structure in power plants. The CMOS(Complementary Metal Oxide Semiconductor) flat panel detecter and Agfa D5 film are used to image flaw specimens respectively. In the test, CMOS flat panel detector has been determined to have a better image than that of film image. In the IQI(Image Quality Indicator) transmission test, one or two more line can be seen in digital image than in film image. Digital Radiography Test enabled to successfully detect all defects on the weld specimens fabricated with real reheat stem pipe and boiler tube as well. In the specific comparison test, Digital radiography test detected micro flaws in the size of 0.5 mm in length by 0.5 mm in depth. However, film test has limited it to 1.0 mm in length by 1.0 mm in depth. As a result of this study, digital radiography technology is estimated well enough to perform the inspection in the industry with far more cost effective way, compared to the classical film test.

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Impact of Digital Literacy on Intention to Use Technology for Online Distribution of Higher Education in Vietnam: A Study of Covid19 Context

  • LE, Thi Lan Huong;HOANG, Vu Hiep;HOANG, Mai Duc Minh;NGUYEN, Hong Phuc;BUI, Xuan Bach
    • Journal of Distribution Science
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    • v.20 no.6
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    • pp.75-86
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    • 2022
  • Purpose: This research aims to provide empirical evidence on the impact of digital literacy on behavioural intention regarding using technology for distribution of higher education. Design, Methodology, and Approach: Quantitative analysis was carried out using Covariance-Based Structural Equation Model with data collected from 901 students who fully experienced 2-year study online at different universities in Vietnam. The structural model was built with digital literacy as the primary indicator and other variables were included based on modified version of Unified Theory of Acceptance and Use of Technology (UTAUT2) by adopting performance expectancy, effort expectancy, social influence, habit, and hedonic motivation variables specifically for education sector. Self-efficacy was added to eliminate possible bias in technology acceptance. Results: From the results of model estimation, digital literacy presented positive impact on the online distribution of higher education in Vietnam. The mediating effects of various indicators such as performance expectancy, effort expectancy, social influence, habit, hedonic motivation, and self-efficacy are significantly determined by research model. Conclusion: The higher level of digital literacy of the students, the more likely that they will use technology in higher education study, especially online learning. Additionally, the mediating effects of indicators from the UTAUT2 theoretical model were also evident to be positively significant.

Relation of Luminance by Insulator and Phosphor Layer with Thin Type (형광층 및 절연층의 두께에 의한 휘도특성)

  • 박수길;조성렬;손원근;박대희;이주성
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1998.11a
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    • pp.85-88
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    • 1998
  • Light-emitting diode(LEDs), diode arrays, and phosphor display panels are finding increased use in a variety of commercial applications. Present and anticipated application of these devices include solid state indicator(e.g., digital clocks, meter readout) and display systems(e.g., instrument panels, TV display), the application being determined by the light -output capability and size availability(cost) of the particular device. In this work, Phosphor based on ZnS:Cu are used. Relation by luminance with the thickness of insulating layer and phosphor layer are discussed. Increased thickness of insulating layer are stable on voltage to 300V. By considering thickness and voltage, optimal structure and thickness are investigated. Also in order to maximize even surface emission, various sieving process are introduced. Very similar phosphor particle size is selected. Luminance by various wave intensity is also investigated. 150cd/m$^2$ luminance are investigated in stable voltage and frequency.

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A Study on the Flatness Evaluation Method of the Dicing Chuck using Chucked-wafer (웨이퍼 장착을 이용한 다이싱 척의 평탄도 평가 방법에 관한 연구)

  • Yook, In-Soo;Lee, Ho-Cheol
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.17 no.3
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    • pp.53-58
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    • 2008
  • This study was conducted to evaluate the flatness of the porous type of dicing chuck. Two measurement systems for a vacuum chuck with a porous type of ceramic plate were prepared using a digital indicator and a laser interferometer. 6 inch of silicon and glass wafer were also used. Vacuum pressure from 100mmHg to 700mmHg by 100mmHg was increased. From experiments, chucked-wafer flatness was converged to the dicing chuck flatness itself even though the repeatability of contact method using indicator was unstable. Finally, the chuck flatness was estimated below $2{\mu}m$ with peak-to valley value.

Development of Multi-channels NMEA0183 Indicator System (다체널 NMEA0183 인디케이트 시스템 개발)

  • Kim, Gwan-Hyung;Oh, Am-Suk
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2011.10a
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    • pp.185-187
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    • 2011
  • 최근 선박 및 물류 자동화는 물류 증대와 함께 선박의 운용을 더욱 복잡하게 만들고 있으며, 선박 내부의 통신 장비 및 통신 시스템의 구성 또한 매우 복잡하게 구성되어 있다. 때문에 지금 현재의 통신장비의 내부 통신 프로토콜은 일반적인 RS-422,485 기반의 NMEA-0183과 CAN 통신 기반의 NMEA-2000 기반으로 해상전자장비의 인터페이스 표준으로 법제화 되어있다. 본 논문에서는 가장 일반적인 NMEA-0183 프로토콜을 7-체널의 NMEA-0183 시리얼 통신 데이터를 지원하도록 설계하였으며, 그 외에 SPI 방식의 3-체널 16비트 ADC(Analog Digital Converter)와 SPI 방식의 2-체널 펄스(pulse) 입력을 받을 수 있도록 설계하였다. 특히, 선박용 통신장비의 중요한 7가지로 한정하여 설계하였다. 본 연구의 소형화를 통하여 이동이 가능하도록 하여 그 편리성을 제공하고, 소형 PC 기반의 중앙 모니터링 시스템을 구현하여 다체널 인디케이트 시스템의 효율성을 제시하고자 한다.

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Design of System for Accurate Tracking Services in Environments with Obstacles

  • Oh, Am-Suk
    • Journal of information and communication convergence engineering
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    • v.19 no.3
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    • pp.161-165
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    • 2021
  • Since the first commercialization of beacon-based services in 2011, various services have been provided to improve Bluetooth performance, and research has been conducted to accurately recognize user locations using beacons. The various measurement methods of indoor positioning systems (IPS) include methods using receiver signal strength indicator (RSSI) the strength of which varies greatly in accuracy depending on whether there are obstacles such as cement walls or doors. In this paper, we present a method to provide accurate positioning services even in the presence of obstacles in indoor spaces. To this end, we connect the HM-10 module supporting the beacon with Arduino Uno, to place beacons in three directions in real-world indoor space, and derive an optimal trilateration equation. Based on the derivation, we select the optimal expression for calculating the distance between the beacon and the moving station and use it to verify the coordinate determination for the moving station.

Development of Multi-channels NMEA0183 Indicator System (다채널 NMEA0183 인디케이트 시스템 개발)

  • Kim, Gwan-Hyung;Oh, Am-Suk
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.11
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    • pp.2327-2332
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    • 2011
  • Recently, the increase of loading amount on cargo ships due to the automation of loading process results in much complex ship operation. For this reason, NMEA-0183 based on RS-422,485 and NMEA-2000 based on CAN communication methods have been usually used as a standardized method in the marin electric interfacing equipments. In this paper, a general NMEA-0183 protocol was designed to support 7-channel NMEA-0183 serial communication data, which can receive 3-channel 16 bits ADC and 2-channel pulse using SPI(Serial Peripheral Interface). In particular, this method was designed for ship communication requires 7 important factors. Also in this study, using the minimization of the proposed method and realizing the monitoring system based on PC, the effectiveness of multichannel indicator system was proposed.