• The Journal of Korean Institute of Communications and Information Sciences
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• v.15 no.6
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• pp.526-534
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• 1990

In the implementation of digital filters, the coefficient errors are occurred when filter coefficients are quantized by finite wordlength. They change the frequency responsed and output characteristics of the filters and therefore they become a main reason which could stimulate coefficient sensitivity especially in recursive filters. In this paper, we study the characteristics of coefficient sensitivity for WDF that is less effective to the coefficient errors. The simulation based on the method of fixed-point quantization demonstrates that the frequency responses of WDF have better preformance than those of conventional cascade IIR filter when variations of finite wordlength is considered.

• Journal of the Korean Society for information Management
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• v.20 no.4 s.50
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• pp.49-66
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• 2003

To understand current state of the digital reference services in Korean academic libraries. a comprehensive examination and analysis was performed. Data was collected from July 8, 2003 to July 22, 2003, through direct site examination and recording the question and answer transcripts. The analysis focused on the provision characteristics and use of the digital reference services. Results revealed interesting findings and related problems. Suggestions for future development are provided.

• Journal of the Korean Society of Costume
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• v.59 no.4
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• pp.111-125
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• 2009

The period from the early years of the 21st Century, when the birth of Digital Clothing received as a kind of digital cultures in the modern information society, to the present time, the period is studied on as a social transition in the revolutionary digital technology in parallel with the fashion changes which have an effect on our thoughts and our life style. After the 2000's, when digital was perceived as a culture, information technology came into being owing to the technological development in the network and informative and communicative technology. This study tried to grasp the tendency of the times to Digital Clothing, which occurred in the new situation of Digital Technology, and then on the base of it, tried to classify the expressive characteristics in the Digital Clothing as the Cyberspace, Global Network, high functionality Smart Textiles and digital technology. The social reformation by the revolutionary digital technology is coming forth in the New Fashion of the digital Clothing, with the development of technology and network in the Cyberspace and real space. the Digital Clothing which led to the revolutionary change in New Fashion occurred, and by the same time, gradually the phenomena of Digital Consuming Culture is expansive.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.4C
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• pp.262-268
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• 2005

The unit of the digital content delivery is the web object. For the improvement of the content delivery based on the web, it id required analysis of reference characteristics of the web object. In this study, we analyze reference characteristics of the web object and evaluate the performance. Using these analysis results, we propose the digital content delivery system which is improved delivery efficiency. The goal of the proposed system are the improvement of the processing time through enhancement of the caching efficiency with reflect reference characteristics of the web object. And the experiment result, we verify the performance enhancement.

• Applied Science and Convergence Technology
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• v.24 no.5
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• pp.125-131
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• 2015

We investigated the thermal characteristics of rotating anode X-ray tube to develop it for digital radiography by using computer simulation. The target which is the area of the anode struck by electrons is the most important component to get a long life of X-ray tube. So we analyze the thermal characteristics of the target and rotor assembly according to their emissivity by using ANSYS transient thermal simulation and then compare with the measured data of the target temperature operating in aging process of X-ray tube. Especially, keeping the lead coated layer as the role of metal lubricant on ball bearing enables to prevent the noise in rotating anode. The simulation result showed that its temperature was under the melting point of the lead in X-ray tube for digital radiography with 1.2 mm large focal spot 0.6 mm small focal spot and 150 kV tube voltage. We also investigated the relationship between the diameter of the anode shaft and the temperature of the anode and rotor assembly. It has been confirmed that the smaller anode shaft could be good for the rotor thermal characteristics.

• Journal of Korea Society of Digital Industry and Information Management
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• v.11 no.1
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• pp.111-120
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• 2015

The christian communities have been maintained and spreaded based on the great foundation of the holy bible. The printing and publishing technology made the holy bible popular at the end of the middle age. Namely, because of this remarkable development, the Bible have been became the best seller for centuries. Since the smart phone users have been growing, the number of people use the Bible Application have been increased. In this circumstance, the interface becomes a crucial element in the Age of Digital Media. Thus, developers have to regard the user's convenient. The user's characteristic is the important point to develop applications. This study is focusing on a particular using of the Bible, and how the using characteristic affects on application's UI. For this study, five bible applications reflecting particular using characteristics are chosen and compared in terms of function of services and elements of UI. Form this comparison and analysis, this study deduces the pattern of UI considering particular using characteristics such as patterns of reading, recording, sharing, and searching the bible. This study would be useful data for publications formed into applications and setting the UI which reflected the using characteristics be better user-centered.

• Journal of the Korean Society of Costume
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• v.59 no.8
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• pp.152-165
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• 2009

The purpose of this study was to expand the expression of Fashion Illustration using Lenticular imaging process. In the 2-dimensional pictures, Lenticular imaging process can be effective to make multiple, virtual and variable images, which are assumed the main characteristics of modern Fashion Illustration. For this study, the main characteristics of digital based fashion trend and Fashion Illustration were analyzed. The main characteristics of digital based fashion were 'Interaction, Variableness, Virtuality, Multiples and Hyper-text' which were related with Simulacre thinking. The main characteristics of expression in Fashion Illustration were 'Virtuality and Multiples'. The image of 'Variableness' was an important factor in digital based fashion, but it was restricted within Fashion Illustration because of the 2-dimensional picture. Therefore, the Lenticular imaging process was proposed as an effective method to expand 2-dimensional limit, giving an effect of 'Variableness' in Fashion Illustration. Based on this study, 5 illustration works were proposed. The Lenticular imaging process was applied in making the images of 'Virtuality, Multiples and Variableness' in 5 works. The result of this study can be a basic material to understand the characteristics of modern Fashion Illustration as a meaningful sub-culture, and diverse expressions corresponding with the phases of the times.

• 한국디지털정책학회:학술대회논문집
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• 2003.12a
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• pp.45-57
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• 2003

In recent years, the number of digital content transaction has increased dramatically, in main, owing to the innovation of IT technology. At the same time, it creates new problems which have never been found in traditional transactions. Especially, due to the easy-copy characteristics of digital content, the illegal usage of digital content proliferates. Also the conflicts between seller an d buyer in digital content transactions on cyberspace market take place frequently because contracts were made without face-to-face discussion. The increase of illegal usage and conflict in digital content market would diminish motivation of creators for their work, furthermore break down digital content market on cyberspace. Digital content transaction authentication system would play an important role in creating sound digital content market. Especially, it would make big contribution to reducing the number of conflict between seller and buyer. In this context, the main objective of this study is to suggest operational model of digital content transaction authentication and to explain critical success factors in organizing digital content transaction authentication system.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.4
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• pp.799-804
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• 2012

To converter time information to digital information Time-to-Digital Converter(TDC) is designed by using analog delay elements. To obtain the temperature stable characteristics the circuit is designed and the operation of the designed circuit is confirmed by HSPICE. The characteristics variation of the designed delay element with temperature is from -0.18% to 0.126% compared to room temperature characteristics when the temperature is varied from $-20^{\circ}C$ tp $70^{\circ}C$. Time difference is from -0.18% to 0.12% compared to room temperature characteristic when the temperature is varied from $-20^{\circ}C$ tp $70^{\circ}C$. The time difference is simulated when the digital output is 15. However the time difference is from -1.09% to 1.28% in the TDC using temperature non-stable analog delay elements.

• The Journal of the Convergence on Culture Technology
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• v.8 no.1
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• pp.597-603
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• 2022

With the continuation of the pandemic environment, digital transformation is being applied in various fields of the fashion industry. Augmented reality technology is a form of overlapping virtual images on the real world, and as online shopping expands in non-face-to-face environments, the use of augmented reality technology in fashion and beauty fields is affecting consumer satisfaction and sales growth. In this study, the characteristics of augmented reality contents used in the fashion industry following digital transformation were extended to the fields of clothing, accessories, virtual fashion stores, and AR fashion shows to analyze the case characteristics of augmented reality. Augmented reality technology in the fashion industry focuses on promoting clothing and accessory products through SNS or homepage through marketing activities. It is raising positive values such as raising awareness. The range of types of augmented reality used in the future digital fashion environment will continue to expand, and by deriving the usage characteristics of augmented reality technology, it is intended to contribute to presenting a future vision of the fashion industry.