• Journal of the Ergonomics Society of Korea
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• v.24 no.3
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• pp.1-10
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• 2005

The primary objective of this study is to design input methods for assisting button selection tasks on a PDA screen. Familiar methods in the existing computing environments were investigated to develop aiding methods. Factors manipulated in the experiment included aiding method, button size, and users' prior experience with PDAs. A total of sixteen participants examined the usability of button selection tasks. Two types of button selection tasks were used as experimental tasks; one was selecting a target button, and the other was selecting multiple target buttons consecutively. The results showed that the aiding method and the button size had significant effects on the subjective satisfaction as well as the performance. In addition, users' prior experience with PDAs affected the performance significantly. The interaction between the aiding method and the button size was found to have significant effects on the performance. However, the interaction effect between the button size and the PDA experience was significant on the task performance time only for the multiple button selection tasks. Design considerations were proposed based on the experimental results. These can be applied to the PDA interaction design to make the PDAs more usable.

• Journal of Technologic Dentistry
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• v.30 no.2
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• pp.57-63
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• 2008

Statement of problem: Conventional techniques for implant framework fabrication produce significant error that is inconsistent with passive-fit requirement for osseointegrated implants. One of the etiologic factors which cause the errors is a sprue which may deform the framework during solidification and contraction. Purpose: This study was aimed to evaluate objectively effect of the sprue design on the accuracy of fit of implant prosthesis. Materials and method: Three different designs were considered relative to effect of casting accuracy. The first design had straight sprues and a button of excess alloy at the non-casting end of the sprues. The second was runner bar design(with the button). The last was straight sprues design(without the button). Gold cylinder and laboratory analogue had been used to diminish variables affecting to casting accuracy. Gold alloy and pressure-vacuum casting machine had been used. Marginal gap had been measured by SEM. One-way ANOVA and Duncan test had been used for statistical analysis. Results: The first design showed $79.87{\pm}13.95{\mu}m$ marginal gap. The second and third were $40.17{\pm}15.8{\mu}m$ and $35.17{\pm}9.95{\mu}m$ respectively. Conclusion: Straight sprues without button and runner bar designs were more accurate than straight sprues with button design(P<.05).

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.496-499
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• 2015

The objective of the study is to develop selfie sticks to enhance portability and prevent error of pushing mobile phone button. The main target of selfie sticks is women and the size of selfie sticks is too big to put it in their bag. Also when people put mobile phone in a selfie stick, people push its button easily. Sometimes mobile phone is turned off or the volume is controlled because of pushing its button. The researcher focused on designing a solution that enhances portability and preventing error of pushing the button. The researcher understood structure of selfie stick. It consists of a mobile phone supporter and a length adjuster. The researcher designed the mobile phone supporter for enhancing portability and the length adjuster for preventing to push the mobile phone. The researcher designed a part which connects a mobile phone supporter with a length adjuster and made selfie stick fold. Also, sponges are partly put on the mobile supporter. It can reduce situation of pushing the mobile phone button. The selfie stick design from the study has an opportunity to distinguish using the product and carrying it and have people use the selfie stick conveniently.

• Journal of Korean Institute of Industrial Engineers
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• v.16 no.2
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• pp.99-107
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• 1990

Many accidents related to robot operation occur during the robot teaching process. This paper deals with recommendations for the teach pendant design parameters to enhance safety and performances in human-robot interactions. In order to investigate the optimum location and the size of the emergency stop button on the teach pendant, an experiment was conducted with a simulated teach pendant which can accomodate four different locations and three sizes of the button. Under a simulated emergency condition, the reach time to the emergency stop button was measured at random combination of the location and the size of button. The reach time was significantly affected by the location and the size of the emergency stop button. The fastest average reach time was attained with 1.5 inch-diameter button on the upper center of the teach pendant.

• Proceedings of the Korea Society of Design Studies Conference
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• 2001.10a
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• pp.62.2-62
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• 2001

• Journal of Digital Convergence
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• v.17 no.4
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• pp.261-266
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• 2019

The purpose of this study is to assess usage of floating action button, a component of Google's Material Design. Case studies were conducted to overview the component's current usage and qualities, followed by eye-tracking experiments and in-depth interviews conducted to 12 subjects. Results have shown that while floating button can promote an action by catching viewers' attention with its striking visual, users tend to look at top more, thus preferring top placement for interfaces. To give positive user experience, designers should consider factors such as the amount of content covered by the button, the way users interact with the application, etc. This study aims to provide proper guidelines for the component's application.

• Journal of the Korea Fashion and Costume Design Association
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• v.5 no.2
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• pp.1-15
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• 2003

Buttons in general reflect the culture of the society, and their values depend on practicality, decorative feature, and symbolism. Their infinite potential enables us to attempt various original changes in formative factors such as forms, patterns, colors, materials and sizes. In addition new styles, methods, and techniques are tried to show that the decorative feature becomes stronger today than it did in the past when the function was more important. Now buttons are not only a factor of clothing but have value as composite art works reflecting the pride, idea and culture of a nation. Moreover consumers' interest in new designs increases everyday as the moderns' desire for unique individuality rises. Button designs of Korea, however, are still far behind in the aspects of materials, qualities, and methods, facilities, and scale of production. And uniform mass production prevails without the buttons of creative and artistic values made due to the lack of specialized designers. Therefore it seems necessary to carry out historial studies simultaneously with the rising interest in button designs now. Prior to developing new designs, the study will examine those of western buttons that are the origin, going through relevant literature and data to define the characteristics of each era and type. It may provide basic data for developing the backward button designs of Korea.

• Fashion & Textile Research Journal
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• v.18 no.1
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• pp.71-79
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• 2016

This study aims to suggest the proper neck-width of slim-fit jackets according to numbers of jacket buttons from an one-button jacket to a four button jacket for men in their 30's. The researchers carried out both an appearance evaluation and a movement functionality evaluation. When analyzing the appearance evaluation, there were meaningful differences. The one-button jacket showed a high score on the back-neck width of +2.4cm. The two-button jacket and the three button jacket showed a high score on the back-neck width of +1.4cm. The four-button jacket showed a high score on the back-neck width of +0.4cm. The result of movement functionality evaluation was not related to the appearance evaluation, and showed no meaningful difference. The one-button jacket and two button jacket showed high scores on the back-neck width of +2.4cm. The three button jacket showed a high score on the back-neck width of +1.4cm. The four-button jacket showed a high score on the back-neck width of +0.4cm. In analyzing both results, the study suggests that the proper front neck-width and that of the back-neck width of +2.4cm be for the one-button jacket, the back-neck width of +1.4cm be for the two-button jacket and the three-button jacket, while the back-neck width of +0.4cm be for the four-button jacket.

• Journal of the Korean Society of Costume
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• v.50 no.7
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• pp.155-163
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• 2000

The objectives of this study were to examine how clothing design preference and clothing attitude vary according to gender of the aging. Using the data collected through interview with 200 subjects who were 60years of age and older residing at Kunsan city area in Korea. These data were analyzed by frequency and $\chi$$^2$-test. The tendency of the gender on jacket stymie preference showed that men liked the soutien collar jacket, two button sing1e Jacket, and four button double jacket, women liked two button single jacket, three button single Jacket and four button double jacket. The general preference did allot depend on the practical purchasing. Men preferred more the soutien collar jacket than the women. On the shirts pattern preference, men liked thick horizon and plaid pattern, while the women liked polk dots pattern and small flowered one. The practical clothing purchase was done by themselves directly. The important criteria depended on the appearance style like simple and smart. For the main complaining factor to purchase the clothes, men considered the color, and women complained not to have suitable shopping stores. The most of all complaining was the expensive prices.

• Fashion & Textile Research Journal
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• v.14 no.6
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• pp.952-959
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• 2012

This study looks into the changes in collar patterns in tailored jackets with different numbers of buttons. The study discusses the pattern design method of tailored colors in 4 different styles, such as the effect of the number of buttons of tailored jackets on collar width and length, lapel width and length, and angle of lapel and overall balance in design. Through the first dress experiment, patterns were adjusted and corrected. The second dress experiment was conducted with the modified experimental clothes. The results of comparison and analysis are as follows. The 1 button tailored jacket was most preferred for its beautiful expression and overall balance of upper color and lapel when its lapel width was 7.5 cm. The second most preferred one was the 2 button tailored jacket with lapel width of 8 cm, and the 3 button jacket showed relatively good balance when its lapel width was 7.5 cm. The 4 button tailored jacket showed a bad balance in collar and button. Also, its overall silhouette was disappointing and thus was less preferred than others. For smaller number of buttons, the angle of lapel's break line increased, thus displaying a more refined and slim silhouette. On the other hand, the angle of lapel's break line decreased for greater number of buttons, thus displaying a dull and fat image. As a result, the jacket with many buttons was less preferred.