• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.39-42
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• 2004

We have designed a portable electronic nose(e-nose) system using an array of commercial gas sensors for recognition and analyzing the various odours. In this paper, we have implemented a portable e-nose system using an array gas sensors and personal digital assistants(PDA) for recognizing and analyzing volatile organic compounds(VOCs) in the field. Field screening for pollutants has been a target of instrumental development for number of year. A portable e-nose system can be substantial benefit to rapidly localize the spacial extent of a pollution or to find pollutants source. And, by using PDA, E-nose have a better function such as the easy user-interface and data transfer by internet from on- site to remote computer. We adapted the Levenberg-Marquardt algorithm based on the back-propagation and proposed the method that could be predicted concentration levels of VOCs gases after classification by separating neural network into two parts.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.89-94
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• 2006

디지털 기술이 전시환경에 도입되면서 다양한 매체를 통해 전시물의 정보를 전달하게 되었다. 그리고 관람자는 단순히 보는 전시에서 적극적으로 전시관람에 참여하고 전시물의 정보를 활용하고자 하는 욕구가 증대 되고있다. 이에 따라 전시환경은 이동하는 관람자를 위해 인터넷과, 모바일 기기를 활용하여 효과적으로 관람체험을 지원하고, 정보를 제공하기 위한 서비스 연구가 중요해 졌다. 따라서 본 연구에서는 디지털 네트워크 환경으로 변화하는 전시 환경과 전시관람을 지원하는 서비스 연구 현황을 이해하기 위해 문헌과 사례조사를 통해 살펴보았다. 그리고 관람자들의 관람 상황과 관람 유형을 파악하기 위해 관람자들의 전시 관람 행동을 관찰하였다. 관찰내용을 분석하여 관람자들의 관람 행동에 따른 관람 유형 및 키워드를 도출하였다. 이를 기반으로 전시관람 시 발생하는 관람자들의 니즈와 문제점을 심층인터뷰를 통해 추출하였다. 관람자들의 니즈와 문제점은 관람자가 전시관을 이동하며 관람하는 상황에서 인터페이스를 통해 해결할 수 있는 요소를 중심으로 전시관람 지원 서비스 요소를 제안하였다. 제안한 서비스 요소는 전시물을 선택하여 관람할 때 전시물과 공간과의 관계를 인터페이스를 통해 파악하고 관람시간을 확인하며 관람하는 해결방안을 제시하였다. 이를 박물관의 전시환경을 사례로 모바일 PDA 에 적용하였으며 사용 시나리오를 통해 제안한 서비스의 유용성과 활용 가능성을 살펴보았다.

• Journal of Biomedical Engineering Research
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• v.26 no.2
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• pp.65-71
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• 2005

The main obstacles for adopting a mobile health information system to existing hospital information system are the redundancy of clinical data and the additional workload for implementing the new system. To obtain a seamless communication and to reduce the workload of implementation, an easy and simple implementation strategy is required. We propose a mobile clinical information system (MobileMed) which is specially designed for the easy implementation. The key elements of MobileMed are a smart interface, an HL7 message server, a central clinical database (CCDB), and a web server. The smart interface module transfers the key information to the HL7 message server as new clinical tests data is recorded in the existing laboratory information system. The HL7 message server generates the HL7 messages and sends them to the CCDS. As a central database the CCDS collects the HL7 messages and presents them to the various mobile devices such as PDA. Through this study we might conclude that the architecture for the mobile system will be efficient for real-time data communication, and the specially designed interface will be an easy tool for implementing the mobile clinical information system.

• Proceedings of the Korea Contents Association Conference
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• 2006.05a
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• pp.148-151
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• 2006

This paper is to design materials management system using RFID which is the core technology of ubiquitous. With existing materials management system, it is hard to manage and analysis effectively. But RFID can be the solution of these problems. In this research, it will be studied how to analysis materials management system Workflow and shall be adapted context awareness technology in order to effective materials management as well as input/output function. Also it shall be completed state management process, position management process, badness management process and be designed PDA interface in order to display the most suitable data.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.52-56
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• 2005

The recent growth of the robot technology has made robots be popular and provides people with many opportunities to apply various robots. But most robots are controlled by its unique program, users feel hard and unfamiliar with robot. Therefore we need to find ways to make user feel comfortable and familiar with the usage of robot. First we will analyze how the user interacts with the robot. Next we will discuss a standard human-robot interface provide more usability with that analysis. In this paper, 10 degree of the Level Of Autonomy(LOA) are proposed. It is evaluated that what interface components and designs are proper to each LOA. Finally we suggest a way to design the standard human-robot interface for remote controlleds robot through handheld devices like the Personal Digital Assistant(PDA) and smart phone.

• Journal of Mechanical Science and Technology
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• v.20 no.4
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• pp.455-466
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• 2006

This study was an attempt to control and monitor Computerized Numerical Controller (CNC) machines anywhere and anytime for the development of a ubiquitous machine (u-machine). With a Personal Digital Assistant (PDA) phone, the machine status and machining data of CNC machines can be monitored in wired and wireless environments, including the environments of IMT2000 and Wireless LAN. Moreover, CNC machines can be controlled anywhere and anytime. The concept of the anywhere-anytime controlling and monitoring of a manufacturing system was implemented in this study for the purpose of u-manufacturing and u-machines. In this concept, the communication between the CNC controller and the PDA phone was successfully performed anywhere and anytime for the real-time monitoring and control of CNC machines. In addition, the interface between the CNC controller and the developed application module was implemented by Object linking and embedding for Process Control (OPC) and shared CNC memory. For communication, the design of a server contents module within the target CNC was based on a TCP/IP. Furthermore, the client contents module within the PDA phone was designed with the aid of embedded c++ programming for mobile communication. For the interface, the monitoring data, such as the machine status, the machine running state, the name of the Numerical Control (NC) program, the alarm and the position of the stage axes, were acquired in real time from real machines with the aid of the OPC method and by sharing the CNC memory. The control data, such as the start, hold, emergency stop, reserved start and reserved stop, were also applied to the CNC domain of the real machine. CNC machines can therefore be controlled and monitored in real time, anywhere and anytime. Moreover, prompt notification from CNC machines to mobile phones, including cellular phones and PDA phones, can be automatically realized in emergencies.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.888-894
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• 2009

Recently, touch screen systems with direct touch interfaces are prevailing in digital products such as MP3's, DMB's, PDA's and navigators, which give rise to new interface issues related to speed, feedback and accuracy, and consider additional considerations for solving those issues in evaluation processes. Although paper prototyping method, the one of applicable methods, is efficient ways to evaluate the touch interface, it still requires a certain amount of adaptations for touch interfaces. This study aims to identify emerged issues regarding to paper-prototyping method for the evaluation of touch interface, to come up with alternatives for applying the method. The study started with analyzing the touch interface in digital products, and suggests the 'Touch Wheel' interface based on mainly used interface. 'Touch Wheel' interface allows the user searching for her/his favorite songs by rolling 'wheel-like' menu list. The Userbility test was conducted by 24 MP3 users with 4 times, and based on such conditions as materials, making methods and evaluating process of paper prototyping for evaluating the touch interface, effective alternatives were considered in each evaluation steps. As a result, paper prototypes for evaluating the touch interface should give active operations to subjects by offering direct experience, so as to provide subjects with proper feedbacks and for designers to collect effective alternatives for expected problems in initial interface design process.

• 한국디지털정책학회:학술대회논문집
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• 2004.11a
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• pp.185-202
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• 2004

Recent development in wireless computing and GPS technology cause the active development in the application system of location information in real-time environment such as transportation vehicle management, air traffic control and location based system. Especially, study about vehicle location tracking system, which monitors the vehicle's position in a control center, is appeared to be a representative application system. However, the current vehicle location tracking system can not provide vehicle position information that is not stored in a database at a specific time to users. We designed a vehicle location tracking system that could track vehicle location using mobile interface such as PDA. The proposed system consist of a vehicle location retrieving server and a mobile interface. It is provide not only the moving vehicle's current location but also the position at a past and future time which is not stored in database for users.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.122-128
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• 2009

In this paper, we present a design and an evaluation of a hand-held ball based haptic interface, named "TouchBall." Using a trackball mechanism, the device provides flexibility in terms of directional degrees of freedom. It also has an advantage of a direct transfer of force feedback through frictional touch (with high sensitivity), thus requiring only relatively small amount of inertia. This leads to a compact hand-held design appropriate for mobile and 3D interactive applications. The device is evaluated for the detection thresholds for directions of the force feedback and the perceived amount of directional force. The refined directionality information should combine with other modalities with less sensory conflict, enriching the user experience for a given application.

• The KIPS Transactions:PartD
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• v.9D no.6
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• pp.1071-1082
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• 2002

Recent development in wireless computing and GPS technology cause the active development in the application system of location information in real-time environment such as transportation vehicle management, air traffic control and location based system. Especially, study about vehicle location tracking system, which monitors the vehicle's position in a control center, is appeared to be a representative application system. However, the current vehicle location tracking system can not provide vehicle position information that is not stored in a database at a specific time to users. We designed a vehicle location tracking system that could track vehicle location using mobile interface such as PDA. The proposed system consist of a vehicle location retrieving server and a mobile interface. It is provide not only the moving vehicle's current location but also the position at a past and future time which is not stored in database for users.