• Journal of Digital Contents Society
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• v.11 no.4
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• pp.529-536
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• 2010

Currently many people are awfully concerned about smart device in domestic and foreign mobile market. The need of smart device has been rapidly increased. Unlike a feature phone smart devices provide us with an intuitive interface which is easy to control. They are enable to smoothly interact between user and device. Though higher market outlook, there is a lack of empirical research on user interface in touch screen based on smart device. In this paper, we propose the touch interface conceptual model concentrating on user based on the result of previous research. Materials of this research are three kinds of smart devices which are currently released. Through expert's depth interview and observation of user, user's cognitive actions in smart device are defined. Since the method of the touch interface which is suitable for the action has been derived, we have proposed the conceptual model of user's cognitive action. This research imply to offer the excellent design guideline in order to implement touch interface to optimize user experience in touch screen based on smart device to release in the future.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.482-485
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• 2007

Recent generation of wireless computing has focus on the integrating of exisitng technologies to enhance the mobile capabilities and developing a new approaches to meet the needs of the growing pool of applications. This paper describes an integrated IEEE802.15.4 wireless CDMA based healthcare system that interacts and received the data wirelessly from wireless medical devices of patient and forward to medical center by using the cellular network. Mobile application had been developed not only as the middle ware to handle the receive and transmit of medical data between wireless sensor network and cellular network but also provides the interface for monitoring and analyzing the health condition of patients continuously at cellular phone regardless of its physical location. This system thus enables the remote healthcare monitoring and supports medical data seamlessly roams between IEEE802.15.4 wireless network and CDMA network beyond and outside the hospital environment.

• Journal of Digital Contents Society
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• v.18 no.8
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• pp.1475-1480
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• 2017

The flourishing China mobile e-book App market has caused a series of problems, for which enhancing the user experience become an urgent matter. As a whole, user experience is related to the five planes such as the device, platform, medium, form and content. However, to understand the user needs is the logical starting point of the whole process. Contextual interview has been conducted in this study, while four types of tasks such as discovering and accessing a target e-book, setting and experiencing the reading interface, listening to the e-book and reviewing and sharing were asked to perform during the process, which has resulted in relevant problems and unpleasant factors in user experience. Based on the aforementioned contents, guidelines for enhancing the user experience of China mobile e-book App has been summarized as a result.

• Journal of the HCI Society of Korea
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• v.9 no.2
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• pp.53-59
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• 2014

The objectives of this research is to compare UX elements influencing the satisfaction of users in Korea and North America according to product types of mobile commerce services, to determine UX INDEX suitable for each type of service, and to derive positively influencing UI factors through analyzing the relationship between UX INDEX and UX design detail factors. This research showed that there was difference in perceived reliability according to selling product types and there was difference in both perceived usefulness and reliability according to users in Korea and North America. Also, this research found out that, in analysis of relationship between UX INDEX and UX design detail factors, UI factors to understand a service structure generally showed close relationship but factors such as troubleshooting and help showed difference between users in Korea and users in North America.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.489-501
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• 2019

This study proposes a sex crime prevention application for single female households. After analyzing the current status of single-person households, crime status in Gimhae, and existing sex crime applications, 15 women in their 20s and 30s living alone were surveyed by users, including cultural probes and contextual inquiry. Insight obtained through user research using the service design tool confirmed that it has a positive effect on user satisfaction in the production of the application. Based on the results of usability assessment, it is a follow-up research task to propose and commercialize actual production outputs for the prevention of sex crimes against single-person household women by further developing the sex crime prevention mobile applications that are the output of this study.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.7 s.361
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• pp.62-70
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• 2007

In this paper, we design a mobile camera processor to support the MIPI CSI-2 and DPHY specification. The lane management sub-layer of CIS2 handles multi-lane configuration. Thus conceptually, the transmitter and receiver have each independent buffer on multi lanes. In the proposed architecture, the independent buffers are merged into a single common buffer. The single buffer architecture can flexibly manage data on multi lanes though the number of supported lanes are mismatched in a camera processor transmitter and a host processor. For a key issue for the data synchronization problem, the synchronization start codes are added as the starting for image data. We design synchronization logic to synchronize the received clock and to generate the byte clock. We present the verification results under proposed test bench. And we show the waves of simulation and logic synthesis results of the designed processor.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.2
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• pp.85-94
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• 2012

In this paper, we develop the new gestures of screen control with fingers on the FTIR multi touch table. It also describes recognition of mobile devices on the table using infrared camera. The FTIR multi touch table was incovenient to the existiog Bluetooth connection, because it is not provided with an HID(Human Input Device) interface. The proposed data transmission method using mobile device is to relieve the inconvenience of the data transfer and proceed more effectively. The new gestures and data transmission method is verified by FTIR multi touch table that is implemented for testing.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.1
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• pp.41-47
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• 2013

A great number of people all over the world are using smart phones. Researchers develop innovative technology of App. It's make rapid progress now that the country's infrastructure is computerized, we expect IT Technological Convergence. In this paper, designs underground utilities management system based on mobile augmented reality technology, and architecture configuration, interface development. Proposal system minimizes overhead of smart devices belonging to engineer's representative using wireless personal area networks. Center Server technology manages transmitted data from engineer's representative, it monitors client data path. And it provies information processing capacity for event generation module. Such event has connotations of instability and uncertainty.

• Journal of Korea Multimedia Society
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• v.21 no.6
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• pp.712-722
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• 2018

This study investigates the merits of incorporating augmented reality in mobile games and proposes a mobile game application that combines augmented reality technology with gaming. The proposed study postulates that augmented reality technology can be employed for developing games on smartphones. The proposed application involves the implementation of a 3D virtual object in the real world by incorporating a target image. The proposed application also employs an intuitive interface with simplified manipulation based on touch, and allows players to collect and combine items for acquiring new items, thus making it elementary to pass the game stages. Furthermore, a ranking system has been introduced in the proposed application for enhancing the amusement factor of the game. The novelty of the proposed application lies in the fact that the virtual button function has been employed for combining physical and virtual objects while playing the game, without incorporating location-based services.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.5
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• pp.1058-1067
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• 2004

Java virtual machine provides code compactness, simple execution engines, and platform-independence which are important features for small devices such as mobile or embedded device, but it has a big problem, such as low throughput due to stack-oriented operation. In this paper hardware lava accelerator targeted for mobile or embedded application is designed to eliminate the slow speed problem of lava virtual machine. The designed lava accelerator can execute 81 instructions of Java virtual machine(JVM)'s opcodes and be used as Java coprocessor of conventional 32-bit RISC processor with efficient coprocessor interface and instruction buffer. It consists of about 14,300 gates and its maximum operating frequency is about 50 Mhz under 0.35um CMOS technology.