• Journal of the Korean Society for Precision Engineering
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• v.16 no.3 s.96
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• pp.30-37
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• 1999

This paper represents the development of the brake system for the inline skate using bellows. The inline skate that is used at present has defects due to frequent impulse, which weakens the breaking force by damaging the parts. Therefore to solve these problems a break system for the inline skates using hydraulics is suggested. To solve the oil leakage problems, bellows is used. Also to prevent the breaks from not touching the ground when skating the bellows is placed at the heel, high as possible. To obtain fast response speed, the ratio of inner diameter of the bellows is changed so that with only a small displacement from the bellows the rubber pad attached to the bellows will touch the ground fast. The performance of the break system using bellows depends on the optimal design of the bellows. Therefore the parameters that changes the form of the bellows are tested and also the interaction between the forces are investigated. The performance of new model brake system with bellows and old model system with only a rubber pad without bellows was estimated through observation of braking posture.

• Journal of the Korean Society for Precision Engineering
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• v.18 no.12
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• pp.73-81
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• 2001

The MIAB welding uses a rotating arc as its heat source and is known as an efficient method fur pipe butt welding. The arc is rotated around the weld line by the electro-magnetic force resulting from the interaction of arc current and magnetic field. The electro-magnetic force is affected by magnetic flux density, arc current, and arc length. Especially, the magnetic flux density is an important factor on arc rotation and weld quality. This paper presents a 2D finite element model for the analysis of magnetic flux density in the actual welding conditions. The magnetic flux density is mainly dependent on gap between two pipes, the position of coil from gap center, exciting current, and relative permeability. Thus, the relations between magnetic flux density and main factors were investigated through experiment and analysis. Experiments were performed for the steel pipes(48.1mm O.D and 2.0mm thickness). The analysis results of magnetic flux density reveal that it increases with increasing exciting current, increasing relative permeability, decreasing distance from gap center to coil, and decreasing gap size. It is considered that the results of this study can be used as important data on the design of coil system and MIAB welding system.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.10
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• pp.4191-4203
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• 2015

WebView is a vital component in smartphone platforms like Android, Windows and iOS that enables smartphone applications (apps) to embed a simple yet powerful web browser inside them. WebView not only provides the same functionalities as web browser, it, more importantly, enables a rich interaction between apps and webpages loaded inside the WebView. However, the design and the features of WebView lays path to tamper the sandbox protection mechanism implemented by browsers. As a consequence, malicious attacks can be launched either against the apps or by the apps through the exploitation of WebView APIs. This paper presents a critical attack called Supplementary Event-Listener Injection (SEI) attack which adds auxiliary event listeners, for executing malicious activities, on the HTML elements in the webpage loaded by the WebView via JavaScript Injection. This paper also proposes an automated static analysis system for analyzing WebView embedded apps to classify the kind of vulnerability possessed by them and a solution for the mitigation of the attack.

• Journal of Fashion Business
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• v.12 no.3
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• pp.16-30
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• 2008

The purpose of this study is to inquire into the necessity and problem of the study on beauty aesthetics, and the direction and method of its study theoretically by applying the concept of aesthetics to the beauty art as an attempt to build up aesthetic concepts of beauty art. As results of inquiry, the study on beauty aesthetics is essential for the adaptation to demands for the creativity of beauty art. As for problem of study on beauty aesthetics, it is necessary to conduct an aggregate study at various angles since the aesthetic value of beauty art (hairstyle) is realized by interaction of the social cultural value or practical value and pure artistic value, and the unique cosmetic beauty of any era or nation group individual is created on the basis of hair designers and individual spirit, emotion and taste, etc. and its perceptual aesthetic enjoyment is accomplished variously. As for the direction and method of study on beauty aesthetics, the quest with abstract speculative self-examination into the beauty having its subjective meaning must be accomplished. This thesis would like to contribute to the building up of beauty industry field as beauty arts based on the aesthetics by successive coming forward of personnel for beauty who combine the aesthetic abilities meeting the diversified requirements of modern society and by improving the recognition of persons recognizing the beauty industry field as a technical field only.

• Journal of Fashion Business
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• v.17 no.2
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• pp.136-150
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• 2013

This study investigates the effect of customer emotions on customer evaluation and behavior intention. The subjects used in this study were customers of a fashion shop in Sunchon South Korea. The questionnaires were conveniently sampled from July 2010 to August, 2010. Questionnaire data from 335 customers of a national brand were analyzed through a reliability analysis, factor analysis, and multiple regression analysis. The results of this study are as follows. First, emotions of customer were divided into 2 patterns, positive emotion and negative emotion. Second positive emotion have significant (+) influences on the trust and negative emotion have significant (-) influences on the trust. Third positive emotion have significant (+) influences on the customer orientation and negative emotion have significant (-) influences on the customer orientation. Forth, the emotions of customer have a considerable impact on the interaction intention. And the positive emotion have significant (+) influences on the word-of-mouth intention and negative emotion have not a considerable impact on it. Fifth the positive emotion have significant (+) influences on the attitude toward store and repurchase intention, and negative emotion have significant (-) influences on the attitude toward store and repurchase intention.

• Journal of Biomedical Engineering Research
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• v.26 no.1
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• pp.17-22
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• 2005

Small animal PET using a dual layer phoswich detector has been developed to obtain high and uniform spatial resolution. In this study, a simple analytic model to optimize the lengths of a dual layer phoswich detector was derived and validated by Monte Carlo simulation. For a small animal PET scanner with a 10㎝ ring diameter, the optimal length of the phoswich detector consisting of various crystal materials, such as LSO and LuYAP, were calculated analytically and validated using GATE. The detector module consisted of 8×8 arrays of crystals, with each phoswich detector element having a 2㎜×2㎜ sensitive area. The total crystal length was fixed to 20㎜. The optimal lengths of the phoswich detector layers, as functions of the crystal materials and order, conveniently derived by the analytic equation, showed good agreement with those estimated by the time consuming simulation. The simple analytical model can be used for the fast and accurate design of an optimal phoswich detector for small animal PET to achieve high spatial resolution and uniformity.

• Journal of KIISE:Computing Practices and Letters
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• v.6 no.1
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• pp.1-10
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• 2000

Spatial analysis in GIS provides an important way that helps the end-users decision-making. For such a reason, query model for analysis should be able to support the users view conceptually in constructing query statements. The traditional approaches in design of query model used to extend the functionality of model that basically designed for manipulation of attribute-operations by appending operators for spatial operations to the query statements of model. However, by the reason of spatial operation's characteristics that are different from those of attribute operations In nature, the structures of query statements in previous approaches are unnatural, inconsistent, and therefore those query models in previous approaches are not able to support the users view in retrieving analysis. In this paper, we proposed the methodology for constructing of user query and internal processing this query based on object-oriented paradigm, in the view of spatial operations by using the basic concept that spatial query is a methodology for spatial analysis. In addition, we presented a strong possibility of designing spatial query model that might actively have interaction with its user by implementing CIW(Class-Information Window) query interface corresponded with the methodology proposed in this paper.

• Journal of Korea Multimedia Society
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• v.11 no.12
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• pp.1765-1774
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• 2008

Due to recent increase of product placement(aka. PPL) in TV drama and entertainment program, the audience of these programs is exposed to the advertisement in the form of the props and backgrounds without discernment. Advancement in digital data broadcasting technology enabled advertisers to insert detailed information of the product or associated advertisement link into the content of the broadcast program as an interactive advertisement. With the interactive advertisement, the audience can focus on the content of the program and the advertiser can create an advertisement with a rich content through the interaction between the advertisement and the audience. It is possible because the interactive advertisement is dynamic advertisement behavior only activated by the audience's intention. In this research, we develop a Hot-spot generator to insert interactive advertisement in the DMB broadcast program. We also suggest dynamic Hot-spot generation technique that allows the Hot-spot object to follow not only the shape of the advertising object in the program, but also the movement of the object as the program progresses.

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.4
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• pp.309-316
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• 2001

MPEG-4 describes audiovisual scenes that are composed of several media objects, organized in a hierarchical fashion. And for end users, it brings higher levels of interaction with content, within the limits set by the author. These spatio-temporal arrangements of the objects in the scene are specified using a parametric methodology, BIFS(BInary Format for Scenes). This paper proposes MPEG-4 Contents Authoring System that provides visual configuration of an MPEG-4 scene and its event information. The developed MPEG-4 Contents Authoring System generates streaming MPEG-4 Contents, such as BIFS stream, OD(Object Descriptor) stream automatically.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.04a
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• pp.985-988
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• 2015

최근 다양한 ICT기술의 발전으로 인간의 사회, 문화, 교육 등의 많은 분야에 변화가 일어나고 있으며, 많은 기술들이 인간 삶의 영역에 적지 않은 영향을 미치고 있다. 그 중에서도 인터넷 웹 표준 기술의 발전은 e-book 시장과 교육용 콘텐츠의 변화가 많을 것으로 예측하고 있다. 따라서 본 논문에서는 N-Screen 지원과 반응형 웹 기술 지원을 위한 3차원 상호작용기반의 e-book 콘텐츠 저작도구 플랫폼 설계를 연구하였으며, 6가지 영역의 상호작용 콘텐츠 개발이 웹 표준에 의해 저작될 수 있는 저작도구 모형을 연구 개발 하였다. 본 논문에서 제안한 e-book의 저작 형태는 웹 표준 기술 HTML5와 ePub3.0 표준을 기반으로 제작할 수 있도록 콘텐츠 플랫폼을 설계 하였으며, 사용자와의 상호작용, 시뮬레이션 등의 기능을 쉽고 빠르게 제작할 수 있는 사용자 인터페이스를 연구 적용하였다. 향후 본 연구의 결과로 전자책 산업 발전과 교육 분야의 활용 향상을 기대하고 있으며, 지식의 체계를 좀 더 다양하게 제공 할 수 있는 e-book 콘텐츠 연구의 원천이 되기를 기대한다.