• Journal of Digital Contents Society
• /
• v.18 no.3
• /
• pp.517-524
• /
• 2017

The aim of this study was to provide basic contents which are based on the appropriate understanding, use, and information of smart devices for young children. The researcher surveyed mothers regarding the effects of their children's development as a result of using smart devices. A survey of 134 mothers with three to five-year-old children currently attending daycare centers or kindergartens was carried out. By using SPSS 18.0, the collected data of survey results was implemented via t-test and F verification. Study findings are as follows: First, the result of the survey analysis indicated that most mothers perceived that using smart devices did not heavily influence their child's development. Second, the mothers' perception was varied depending on whether it was their child's the first time using smart devices, the mother's education level, and on the mother's employment situation. However, there was no difference of perception in regards to gender. The results of this study suggest the necessity of parental intervention and prevention of side effect of children 's smart device use and parent education program.

• Journal of KIISE
• /
• v.42 no.1
• /
• pp.1-6
• /
• 2015

Smart electronics are now widely used in everyday life, but the size of the screen of such devices is still too small to fully enjoy multimedia content. Therefore, if the display is comprised of multiple views produced by multiple smart devices, then the screen output size can increase. However, a time delay between the devices can generate a discordance in the video and sound. This paper compares two synchronization techniques that can be used to minimize such a time delay, and proposes a synchronization technique in which, the timing of the screen for each device is calculated by synchronizing the playback time, using the timing information transferred from the control device, and periodically adjusting the playback timing forward or backward. When multimedia content is reproduced using multiple views from multiple smart devices, we can minimize the time delay, regardless of the network quality or the differences in the devices used for this technique.

• Journal of Korea Society of Industrial Information Systems
• /
• v.27 no.6
• /
• pp.1-12
• /
• 2022

As the music streaming service and the Hi-Fi market grow, various audio devices are being released. As a result, consumers have a wider range of product choices, but it has become more difficult to find products that match their musical tastes. In this study, we proposed a system that extracts the vocal component from the user's preferred sound source and recommends the most suitable audio device to the user based on this information. To achieve this, first, the original sound source was separated using Python's Spleeter Library, the vocal sound source was extracted, and the result of collecting frequency band data of manufacturers' audio devices was shown in a grid graph. The Matching Gap Index (MGI) was proposed as an indicator for comparing the frequency band of the extracted vocal sound source and the measurement data of the frequency band of the audio devices. Based on the calculated MGI value, the audio device with the highest similarity with the user's preference is recommended. The recommendation results were verified using equalizer data for each genre provided by sound professional companies.

• The Journal of the Convergence on Culture Technology
• /
• v.10 no.3
• /
• pp.405-411
• /
• 2024

The purpose of this study was to examine the mediating effect of social support on the relationship between the use of digital devices and successful aging among the elderly. For this study, the data were collected from 363 elderly over the age of 65 years who were registered in the Senior Welfare Center located in D city and K city and data were analyzed using SPSS 22.0 and PROCESS Macro v3.5 Program. The results of the study showed that the use of digital devices of the elderly was positively related to social support and successful aging. Moreover, the use of digital devices and social support were statistically significant variables in explaining the variance of successful aging among the elderly. In addition, social support had a significantly mediating effect on the relationship between the use of digital devices and successful aging among the elderly. Finally, based on the findings, the implication for the improving successful aging among the elderly considering promoting the use of digital devices and social support and the recommendations for the further research were provided.

• The KIPS Transactions:PartB
• /
• v.14B no.3 s.113
• /
• pp.153-162
• /
• 2007

Sasang medicine is peculiar medicine that constitution of a human classify four types and differ treatment method by physical constitution. In this way the most important thing is very difficult problem that classification of Sasang constitution and discriminate correctly. Therefore, in this paper targets diagnosis medical appliances development of hybrid form that can behave constitution classification and sees among for this paper to propose about method to grasp characteristic that is morphology about eye, nose, ear and mouth be based on appearance and manner of speaking. In this paper, classified and verified this for Sasang constitution through the QSCC II program at 1 step and present method that more exactly and conveniently analyzing measure each physical constitution feature by survey about eye, nose, ear and mouth at 2 steps. Also, extraction and analyze and verified main area of physical constitution classification based on front face and side face at 3 steps. Such propose method to extraction the principal face region based on face color from front face and side face for correct physical constitution classification diagnosis appliance development through experiment consideration and verification process.

• 한국HCI학회:학술대회논문집
• /
• 2008.02a
• /
• pp.256-261
• /
• 2008

We developed an authoring tool for designing vibrotactile patterns quickly and easily by using the drag-and-drop paradigm in mobile devices. Designed vibrotactile patterns are registered into a data pool in the XML format, improving the reusability and extensibility of vibrotactile patterns. A multi-channel timeline interface is also incorporated to provide time-synchronized pattern editing for multiple vibration patterns (for multiple vibration actuators). In addition, an internal vibration player is embedded in the authoring tool in order to evaluate the patterns on the spot. A transform function for perceptually transparent vibration rendering can also be set in the editor. Although the authoring tool was developed for mobile devices, it can be used for other applications such as haptic interaction m virtual reality.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.28 no.5
• /
• pp.1113-1118
• /
• 2018

Fingerprint authentication is the most popular biometric in smart devices. However it has vulnerability to fake fingerprints. This paper shows that it is possible to pass fingerprint authentication of smartphone by creating counterfeit fingerprint without approval of legitimate users. As a technical countermeasure to prevent such a smudge-based attack, there has been proposed an under-screen Touch ID with a slide bar, which is a method of removing the fingerprint trail by dragging the UI to the side after fingerprint authentication on the touch screen. In this paper, we analyze how the proposed attack method and mitigation are perceived by actual user through 61 user survey.

• Journal of Advanced Navigation Technology
• /
• v.16 no.3
• /
• pp.518-525
• /
• 2012

The modulation transfer function is generally used as a method to estimate the characteristics of this kind of optical system because it cannot reappear or implement image of the object perfect. By the way, it is difficult to assess the optical system with existing MTF method since the reaction between diffraction and aberration of aperture is very complicate if the aberration is very small. The MTF has to be calculated considering the numerical aperture, defocusing, OPD and phase difference. We validate its feasibility using bessel function as an estimating method, and then realize it through illustration in this paper.

• KIPS Transactions on Computer and Communication Systems
• /
• v.6 no.2
• /
• pp.67-74
• /
• 2017

This paper proposes a method of user authentication through the patterns of arm movement with a wrist-type wearable device. Using the accelerometer sensor which is built in the device, the 3-axis accelerometer data are collected. Then, the collected data are integrated and the periodic cycle are extracted. In the cycle, the features of frequency are generated with the accelerometer. With the frequency features, 2D Gaussian mixture are modelled. For authenticating an user, the data(the accelerometer) of the user at some point are tested with confidence interval of the Gaussian distribution. The model showed a valuable results for the user authentication with an example, which is average 92% accuracy with 95% confidence interval.

• 한국HCI학회:학술대회논문집
• /
• 2006.02b
• /
• pp.191-196
• /
• 2006

새로운 휴대폰 기기가 하루가 다르게 개발되어 상품화 되는 가운데 사용자의 시각에 입각한 사용성 평가는 앞으로 새롭게 선보일 휴대폰 기기의 방향성을 제시해 줄 수 있는 중요한 척도이다. 특히 근 몇 년간 다양한 기능이 convergence 된 휴대폰들이 늘어남에 따라 사용자 관점에서의 평가 방법에 있어, 실제 사용자는 예측할 수 없고 셀 수 없는 다양한 상황과 환경 속에서 휴대폰 기기를 사용하게 된다는 사실을 주목해야 할 것이다. 따라서 본 연구에서는 끊임없이 변화하는 휴대폰 기기로 인하여 실제 user 가 자신의 특성과 습관, 시시각각 다르게 처하는 환경과 함께 야기되는 휴대폰에 대한 use experience 를 수집하고 분석하는 적합한 방법론을 새로이 제시하고, 이를 사례 연구를 통하여 검증함으로써 사용자 경험을 수집하는데 유용한 새로운 방법론을 개발하는데 그 목적이 있다. 이러한 사용성 테스트의 새로운 분석 방법으로, 특정 휴대폰의 웹 리뷰사이트, 인터넷 동우회와 같은 온라인 커뮤니티상에서 테스트에 응할 여지가 있는 expert user 를 엄선하여 선정 하였으며, 그들에게 휴대폰을 사용하면서 겪게 되는 경험이나 문제점을 휴대폰의 어떠한 부분에서 언제, 어떠한 식으로 발생되었는지에 대하여 work book 의 형식을 통하여 기록하고 다시 그것을 바탕으로 In-depth interview 함으로써 사용자의 경험의 축적에 따라 사용성을 평가하는 프로세스를 새로이 개발하고 적용하였다.