• Journal of Digital Contents Society
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• v.12 no.3
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• pp.263-270
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• 2011

The importance of effective delivery of information in the mobile web is increasing in Korea, due to the growing number of smart-phone users. In this study, I took a look at the characteristics of mobile devices and the mobile web, and after researching Korea's portal websites' mobile web designs, we figured out the users' preferences of mobile web designs through surveys and interviews. To provide compressed information on a small screen, it is ideal for significant contents to show up in the state that does not require scrolling. Users preferred compact and neat designs, and menus that were made with icons that are easy to touch with fingers, in the mobile web. When receiving delivered information, users preferred not only texts but texts that were provided together with photograph images. If usability evaluations and examination of preferences are achieved together, I think it will serve as a mobile web guideline that enables efficient delivery of information in the mobile web.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.2
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• pp.57-62
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• 2011

Recently, various interaction was demanded from rapid development and use of portable device. So, operation of touch interface in tablet and smart phone needs many requirements and proactivity. In this paper, for variety of users and convenient interaction, It is aimed to realize virtual reality mouse of portable device. It reflected similar interaction of an existing mouse and it used infrared image without intensity of illumination. Also, It analyzed finger point information of middle and index finger of users and it designed virtual mouse without proactivity and constraint of space.

• Journal of Korea Society of Digital Industry and Information Management
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• v.13 no.4
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• pp.171-178
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• 2017

The controversy about the burger button triggered in 2013 is that it is difficult to know what the hamburger button itself means and that it is difficult to predict what will happen when the button is clicked, Could. This controversy was found to be fundamentally out of touch, and it could be seen that it caused conflict with Apple's navigation structure with iOS. Therefore, in the case of Apple, it is often used in the form of a tab at the bottom instead of using the slide menu, but it is preferable to be used for the purpose of the hamburger button. I've looked through a variety of documents and found that the amount of content you want to offer on your app or the web is large, and there are five or more categories. And if a sub-category needs to exist in the main category like a large shopping mall, the hamburger button could provide the best UI. Apps and webs that can be curated, such as news and pinterest, are better used to enhance the search filter than to place a hamburger button, and for apps or the web that has a longer amount of content on a page Scrolling was available as an alternative to the burger button. In other words, depending on the amount of content to be provided, it is possible to decide whether to use the hamburger menu from the time of designing the information architecture.

• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.3
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• pp.537-543
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• 2012

Smart home System is shirt-sleeve, the automatic control systems, computer network system and network communication technology in the integration of network intelligent home control system. Intelligent household will let users have a more convenient means to management of domestic equipment, for example, through the house, wireless remote control, touch screen phone and Internet or speech recognition control household devices, more can perform scene operation, make more equipment form linkage. In this paper, we propose the intelligent household various kinds of equipment within each other can communication, do not need to user command according to different state interactive operation, thus to bring the greatest degree of user efficient and convenient, comfortable and safe.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.226-232
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• 2007

모바일폰의 LCD 전면화 추세로 인해 터치스크린을 기반으로 하는 모바일폰이 컨셉폰의 형태로 선보여지고 있고, 부분적으로 터치스크린을 차용한 모바일폰이 국내, 국외에 출시되고 있다. 터치스크린은 간편하고 직관적인 조작감을 제공하며 유동적인 인터페이스를 가능하게 하는 장점이 있다. 그리고 이러한 터치스크린의 장점을 적극적으로 활용할 수 있도록 하는 진보된 인터랙션 스타일도 다양하게 제안되고 있다. 하지만 기존의 터치스크린 기반의 모바일폰은 스타일러스를 그대로 사용하듯, 제한적이고 전형적인 인터렉션만을 제공하고 있고, 제안된 진보된 인터렉션 스타일들도 터치스크린 기반의 모바일폰에 직접적으로 활용하기는 어려운 실정이다. 본 연구는 진보된 인터랙션 스타일 중에서, 원 포인팅과 2개 이상의 포인팅이 가능한 멀티 포인팅 인터랙션을 연구하여 터치스크린기반의 Full LCD 모바일폰에 적합한 인터랙션 스타일을 제안한다. 이를 위해, 인터랙션에 대한 문헌연구와 함께 터치스크린을 기반으로 하는 다양한 디지털기기를 검토해보고, 터치스크린에 적용 가능한 진보된 인터랙션 사례들을 조사하였다. 그 후 터치디스크린 기반의 디지털기기를 사용하는 사용자의 행태를 파악하기 위한 유저테스트 및 인터뷰를 실시하여, 터치스크린 기반의 모바일폰에서 구현되어야 할 상세 인터랙션 스타일을 도출하였다. 본 연구에서 제안된 인터랙션 스타일은 다양한 사용자 경험을 가능하게 하여 고기능, 고사양화 되어가는 모바일폰의 UI를 보다 효과적으로 사용하는데 도움을 줄 것으로 기대된다.

• KIPS Transactions on Computer and Communication Systems
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• v.2 no.12
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• pp.525-532
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• 2013

Recently smartphones, tablet, etc. Various types of smart terminal is due to the increased security in mobile devices are becoming an issue. How to enter the password in this environment is a very important issue. Difficult to have a secure password input device on various types of mobile devices. In addition you enter on the touch screen the password of character, uncomfortable and it is vulnerable to SSA attack. Therefore, in this paper provide for defense the SSA(Shoulder Surfing Attacks) and useful password input mechanism is proposed with Smartphone GPS uses a value generated via a graphical password techniques.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.45 no.2
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• pp.154-162
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• 2017

CanSat Competition has been annually held in South Korea since 2012 to give students an opportunity for better understanding of system design and operation processes of satellite. SCSky CanSat(Smart Call from the Sky Can Satellite) proposed in this study is a name of CanSat that was participated in 2016 CanSat competition. Its main mission objective is to obtain flight imaging data of inside and outside the CanSat through the video call using on-board smart phone in the CanSat. To implement this mission, we developed a remote touch system using SMA(Shape Memory Alloy) wire. In addition, a wide scan camera mechanism using SMA spring was developed to obtain ground imaging data during the mission. This study introduced the mission of the SCSky CanSat, as well as the description of on-board payloads, system design results, and flight test results.

• Biomedical Science Letters
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• v.14 no.4
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• pp.257-261
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• 2008

Cellular phones are the most used electronic device everyday in modern life and are always in contact with our hands, Although many studies have revealed microorganisms living on our hands, there are only a few reports on the research about products or places which are in contact with our hands. Therefore, the purpose of this study is to verify microorganisms living in cellular phones. Microorganisms were scraped from cellular phones of students and professors from the clinical laboratory science department in Daegu Health College, and cultured at Brain Heart Infusion agar and MacConkey agar following API kit to identify them. The average colony number was $1.5{\times}10^2$ on BHI agar and $40{\times}10$ on MacConkey agar. There was no difference according to gender. In Gram stain result, Gram(+) Cocci showed the highest frequency. Also in BHI agar plates, Micrococcus spp and Acinetobacter baumannii identified with high frequency. Moreover, S. aureus, which is very well known as strong food poisoning bacteria, was isolated. Klebsiella pneumonia ssp pneumonia was isolated with the highest frequency from the MacConkey agar or S-S agar plate. From these results show, there are as many different microorganisms from cellular phones as from our hands. This is the first report isolating strong food poisoning bacteria in cellular phones. Since infection in hospitals have been an important issue to be aware of, it is equally necessary to investigate cell phones and products which hospital workers touch with their hands.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.895-900
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• 2009

This study focused on user centered design methodology on mobile service design, Especially we designed business supporting service for sale persons with heavy mobile uses in their works. We used contextual inquiry interview to understand user's work context and mobile usage. The findings are applied to the service concept, And information architecture, interaction design, GUI design is followed. As a result of design research, Post widget service is designed for instant information organization and functional relationship. And Memory box widget service is designed for business network management and contextual findability. Those services are developed for widget design on touch based phone platform.

• Design & Manufacturing
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• v.11 no.1
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• pp.1-6
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• 2017

In these days, due to generalization of using smart mobile phone and wearable device such as smart watch, demand of Cover-glass and touch screen panel for protecting display increases. With increasing the demand of Cover-glass, slimming technique is promising for weight lightening, zero bezel. Cover-glass produced by this technique is required to decreasing thickness with increase strength. In the Cover-glass manufacturing process, mechanical processing and chemical processing has improve in the strength. Generally, Diamond electrodeposition wheel is used in mechanical process. Reinforced glass with the characteristics of the brittle and high hardness was manufactured by using a diamond electrodeposition wheel. At this time, Because of surface of the tool present non-uniform distribution of diamond particle, it has generate Loading of wheel and it has been decrease life of grinding tool, efficiency of grinding, quality and shape accuracy of workpiece. Thus Research is needed to controling particle distribution of diamond electrodeposition wheel uniformly. And it is necessary to study micro hole machining such as proximity senser hole, speaker hole positioned Cover-glass. Reinforced glass with the characteristics of the brittle and high hardness is difficult to machining. Processing of reinforced glass have generated wear of tool, micro cracks. Also, it is decreasing shape accuracy. In this paper, We conducted a study on how to control particle distribution uniformly about the diamond tool manufactured using elecetodeposition processing. It analyzed the factors that affect the arrangement of the particles in the electrodeposition process by design of experiment. And There is produced the grinding tool, which derives an optimum deposition conditions, for processing Cover-glass edge and the machinability was evaluated.