• Journal of Power System Engineering
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• v.13 no.2
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• pp.71-82
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• 2009

This paper presents a real-time haptic rendering method for a realistic force feedback in a remote environment with varying communication time-delay. The remote environment is assumed as a virtual environment based on a computer graphics, for example, on-line shopping mall, internet game and cyber-education. The properties of a virtual object such as stiffness and viscosity are assumed to be unknown because they are changed according to the contact position and/or a penetrated depth into the object. The DARMAX model based output estimator is proposed to trace the correct impedance of the virtual object in real-time. The output estimator is developed on the input-output relationship. It can trace the varying impedance in real-time by virtue of P-matrix resetting algorithm. And the estimator can trace the correct impedance by using a white noise that prevents the biased input-output information. Realistic output forces are generated in real-time, by using the inputs and the estimated impedance, even though the communication time delay and the impedance of the virtual object are unknown and changed. The generated forces trace the analytical forces computed from the virtual model of the remote environment. Performance is demonstrated by experiments with a 1-dof haptic device and a spring-damper-based virtual model.

• The Journal of the Korea Contents Association
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• v.5 no.4
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• pp.28-35
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• 2005

This paper examines empirically the effect of mileage program in e-Business on brand loyalty, and the mediating role of customers' trust and relational commitment. The results show that customer's benefits and convenience of the program significantly influences positively customer's trust. In addition, customer's trust also influences positively relational commitment, and relational commitment significantly influences positively brand loyalty. Thus, trust and relational commitment should be considered in the mileage program to improve the brand loyalty of internet shopping mall. Implications and limitations of this study are suggested.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.11a
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• pp.125-128
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• 2003

현대에는 모든 기업 활동과 사회활동에 있어서 인터넷의 사용은 필수조건이 되고 있다. 20세기 후반에 들어서면서부터는, 과거의 전통기업과 비교되는 인터넷 쇼핑몰이 급속하게 생겨나기 시작했다. 인터넷 쇼핑몰은 기업의 기반을 가상의 인터넷 상에 두고 있기 때문에, 전통기업과는 기업 활동의 수행 방법에 있어서 큰 차이가 있다. 인터넷 쇼핑몰은 인터넷이라는 새로운 매체를 이용하기 때문에 전통기업 평가에 이용되었던 재무적 지표뿐 아니라, 새로운 다양한 지표(웹 접속률, 페이지 뷰 등)를 통해서 기업의 장점을 파악 할 수 있게 되었다［14］. 따라서 인터넷 쇼핑몰을 평가하기 위해서는 기존의 전통기업 평가방법을 그대로 이용하기에는 무리가 있고, 새로운 가치평가 지표가 필요하게 되었다. 기업을 평가하는 여러 가지 방법 중, 하나인 balanced-scorecard(BSC)［9］는 균형적이고 체계화된 평가 틀을 제시해주고 있다는 장점을 갖고 있다. 그러나 기존의 BSC는 전통기업을 대상으로 했기 때문에, 인터넷 쇼핑몰의 평가에 곧바로 적용하기에는 적합하지 못하다. 따라서 본 논문에서는 balanced-scorecard 방법을 인터넷 쇼핑몰 평가에 적합하게 수정하고자 한다.

• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.6 s.154
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• pp.992-1000
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• 2006

The main purpose of this research is to develop the methodology of objective evaluation of clothing appearance by eye movement analysis. The visual clothing items used in this study were skirt, one-piece, pants and shirt with the style variation of silhouette and details. By observing eye movement during visual evaluation of clothing, we can achieve the basic fixation data of eye movement. Moreover, we developed the Matlab program to extract the fixation coordinate and number of eye fixation on each part of the clothing item. As results, there were differences in the duration of fixation time for each item and the fixation time was not different by styles within a clothing item. However, we could find differences in the fixation time within a style, in other words, we could select the important parts of the clothing by observing the fixation time in a certain clothing item. It is also noted that time required in visual information processing differs depending on the item, and there was a region which contain more information independent with styles in the same item. By developing the objective method of visual evaluation that correspond to human's visual information processing, the results are expected to be applied in the retrieval program in internet shopping mall or in the development of contents for advertisement of clothing.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.2 no.1
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• pp.59-66
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• 2001

Networked Virtual Reality systems provide a consistent virtual world to the users, possibly ditributed across long distance, and have been widely applied in the military war game, network game. edutainment, architectural areas, and shopping mall etc. Large processing requirements. however. made these systems be mainly researched on the platforms of high-performence system graphics workstations. This study paper Presents several problems when networked virtual reality systems are implemented on commodity Internet : two problems related with 3D graphical Processing, and the other related with network bandwidth and transmission delay. We also suggest solutions to these problems and analyze their performance effect based on an architectural simulation application.

• Journal of the Korea Computer Industry Society
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• v.2 no.11
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• pp.1383-1394
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• 2001

Through the extension of damages caused by hacking and computer virus, although security control has been emphasized, hackers' capability exceeded the security controllability. The basic security setup of server system will be free from the damages by primary and intermediate level which are the major group. It should be noted that security condition of most middle-sized and personal systems is widely open for hacker's intrusion. There is no perfect information system either software-wise or hardware-wise. It has to be recognized that our systems will be attacked easily by the hackers and computer virus. Computer users are demanded to be prepared for these types of surprise attacks. In this paper, I will propose a formation of Bastion server. This will protect risks from inside & outside intrusion which have been known till today.

• Proceedings of the Korea Information Assurance Society Conference
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• 2004.05a
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• pp.309-316
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• 2004

The industrial structure with Internet is changing from offline to online. By developing of network, E-commerce will be big market. It is natural to increase of E-commerce and interest of people. but, it is supported by system and technics. First of all, we need customer authentication service method. In this paper, we described about Electronic shopping mall Security by three main categories. One is general security solution of I-commerce, Second is analyzing about various threats, vulnerability and countermeasures to that. Third is security consideration of directory service in I-commerce circumstance.

• Management & Information Systems Review
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• v.13
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• pp.71-97
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• 2003

As an electronic commerce grows in a rapid speed today, it has a great effect on not only our consuming lives but also the marketing activities. The study on involvement levels and consumer satisfaction in physical market in the existing studying papers in home was made progress rapidly. But, the study on involvement levels and consumer satisfaction in virtual market leaves much to be desired. This paper aims at considering the relationship between the involvement levels and the consumer satisfaction factors in the electronic commerce through the internet shopping mall whose importance is emphasized day by day. In this paper, three following questions were studied: (1) what is the difference among the factors(product/service/image) of consumer's satisfaction in accordance with consumers' involvement levels, (2) what is the difference in an intention of repurchase in accordance with the consumers' satisfaction factors, and (3) what is the difference in an intention of repurchase in accordance with the involvement levels and the consumers' satisfaction factors. As a result of analysis, only the service one of the factors of consumer's satisfaction has a difference in accordance with high/low involvement, and also, the factors which have an effect on the intention of repurchase were product, service and image.

• Journal of Korea Society of Digital Industry and Information Management
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• v.10 no.3
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• pp.223-235
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• 2014

In this study, it is the study of foreign tourism content information providing utilizing mobile indoor location information services. In particular, we compared the Web App used in Osaka, Japan. Widespread use of smartphones in the world increases, it is changed to free travel of individuals from group travel. Tourists cultural complex shopping mall is able to travel in a room is increasing. By utilizing the services of the guidance location based on the room, it is possible to easily obtain the discount coupon information, tourism content. Also, it is possible to grasp the movement path and disaster relief information. Osaka Japanese tourists increased after the earthquake in Tokyo. So we compare the difference in Osaka web and applications. If improving the indoor location information service method of domestic if it would help foreign tourists attract. In addition, it will give a big impact if there is a fusion of the Internet of things.

• Fashion & Textile Research Journal
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• v.11 no.2
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• pp.308-314
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• 2009

In creating an avatar, consumers can find out for themselves their own sizes to be entered. Also, putting in a face creation main-page menu option enables clients to make up their faces and match them to their bodies. Through this process when purchasing clothes through the internet consumers can enter their own body sizes and create avatars that are identical to their body shape. The uniqueness of developed prototype is that it creates an avatar similar to one's body shape according to body size inputs and demonstrates visually to customers the on-line comfort test which was only available off-line traditionally. The avatar follows the movement of mouse from left to right which enables 3 dimensional visualization. Through maximizing the visual effect this research focuses on enabling consumers to feel subjective parts as if they are off-line. This study seeks to provide a type of prototype of an online shopping mall that meets the demand of the consumers using the 3D avatar.