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Intelligent Access Control Mechanism for Ubiquitous Applications

Intelligent Access Control Mechanism for Ubiquitous Applicat...

引用

International Conference on Computer and Information Science (ACIS)

作者： Tae-Hum Lim Sang-Uk Shin Department of Interdisciplinary Program of Mechatronics Engineering Pukyong National University South Korea

As computing technology becomes more pervasive and mobile services are deployed, ubiquitous applications will need flexible access control mechanisms and more suitable access control decisions. Despite the advances in access control approaches applicable to ubiquitous applications, there remain issues that impede the development of effective access control for ubiquitous applications. Amongst them are the lack of context-based models for access control, and reliance on identity or capability-based access control schemes. In this paper, we propose intelligent system using a neural network algorithm for ubiquitous applications, which extends the role based access control with context constraints. Also we apply a neural network algorithm for making access decisions.

关键词： Intelligent control Access control Neural networks Mobile computing Intelligent networks Personal digital assistants Application software Intelligent systems Permission Pervasive computing

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Fundamental techniques of mobile robot for inspection of CAS in oil tanker

Fundamental techniques of mobile robot for inspection of CAS...

引用

9th IASTED International Conference on Control and Applications, CA 2007

作者： Chang, Woo Son Seung, Heui Lee Seok, Jo Go Min, Cheol Lee Mechanical and Intelligent Systems Engineering Pusan National University Jangjeon 2-dong Geumjeong-gu Busan Korea Republic of Interdisciplinary Program in Mechatronics Pusan National University Jangjeon 2-dong Geumjeong-gu Busan Korea Republic of Division of Mechanical Engineering Dongeui Institute of Technology Yangji5Ro Busanjin-gu Busan Korea Republic of School of Mechanical Engineering Pusan National University Jangjeon 2-dong Geumjeong-gu Busan Korea Republic of

ISBN: (纸本)9780889866652

It is dangerous that a technician the inner parts of an oil tanker for defects and conditions because of many harmful gases, complex structures, etc. However, these inspections are necessary to many oil tankers of old years. In this reason, we proposed the fundamental techniques of mobile robot for inspection of CAS in oil tanker. The developed CAS inspection mobile robot has four modules, a measurement module of oil tanker's thickness, a corrosion inspection module, a climbing module of the surface on a wall, and a monitoring module. In order to getting over at a right angled path, the driving control algorithm was developed. And, magnetic wheels were used to move the surface of a wall. This study constructed a communication network (Bluetooth) and the monitoring program to operate the developed mobile robot from remote sites. In order to evaluate the inspection ability, the experiments using developed mobile robot have been conducted.

关键词： Mobile robots

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Performance analysis of UPS(Ultrasonic Positioning System) using DGPS

Performance analysis of UPS(Ultrasonic Positioning System) u...

引用

IECON 2004 - 30th Annual Conference of IEEE Industrial Electronics Society

作者： Kim, Su Yong Lee, Dong Hwal An, Hee Tae Lee, Sang Hun Koh, Young Ho Lee, Man Hyung Department of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Republic of Department of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of School of Mechanical Engineering Pusan National University Busan Korea Republic of

In this paper, the position of a mobile robot using DGPS(Differential GPS) and UPS(UItrasonic Positioning System) is measured and the performance of UPS is analyzed using DGPS. UPS is absolute positioning system using ultrasonic waves and has better performance in low price than the other absolute positioning systems. So in order to evaluate the performance, UPS is compared with the RTK(Real-Time Kinematics) method, which is of the most accurate methods in the DGPS. As a result, the possibility of using UPS can be discussed as pseudolites or pseudo-satellites in the place where GPS is not available. © 2004 IEEE.

关键词： Mobile robots

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Ultrasonic satellite system for the positioning of mobile robots

Ultrasonic satellite system for the positioning of mobile ro...

引用

IECON 2004 - 30th Annual Conference of IEEE Industrial Electronics Society

作者： Lee, Jung-Min Lee, DongHwal An, HeeTae Huh, Nam Kim, Myoung Kook Lee, Man Hyung Departement of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Republic of School of Mechanical Engineering Pusan National University Busan Korea Republic of

The positioning problem of mobile robot is an important part of control problem for mobile robot. Dead Reckoning is widely used for positioning of mobile robot. However this method has problems because it accumulates estimation errors. In this paper, we propose a new method to increase the accuracy of estimated position using the U-SAT(Ultrasonic Satellite system). U-SAT is composed of a distance measurement using ultrasonic wave and the position acquisition in the world coordinate using the GPS. It is shown that we will be able to estimate the position of mobile robot precisely, in which errors are not accumulated. The experimental results show that the proposed method is enable to estimate the position of the mobile robot. © 2004 IEEE.

关键词： Mobile robots

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Research on navigation system of an autonomous vehicle using RTK-DGPS

Research on navigation system of an autonomous vehicle using...

引用

Annual Conference of Industrial Electronics Society

作者： Jae Heon Ryu Yu Shin Chang Gun Hong Park Chun Han Lee Seok Hyun Park Man Hyung Lee Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Departement of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea School of Mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

This paper describes the development of navigation system for an autonomous ground vehicle at limited area by using RTK-DGPS. Before the autonomous drive, we make map data by using RTK-DGPS that is a reference trajectory for the autonomous vehicle. The navigation system with map data computes the yaw angle of the vehicle by using its present position and next position. And the steering wheel of the vehicle is controlled by using fuzzy logic controller. A prototype of the autonomous vehicle by the navigation method is developed and navigation performance of the system is evaluated. The experimental results show that the navigation system based RTK-DGPS can exactly track the map at the low speed. We expect that this navigation system can be more accurate by augmenting other sensors.

关键词： Navigation Remotely operated vehicles Mobile robots Land vehicles Trajectory Vehicle driving Wheels Fuzzy logic Prototypes Sensor systems

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Ultrasonic satellite system for the positioning of mobile robots

Ultrasonic satellite system for the positioning of mobile ro...

引用

Annual Conference of Industrial Electronics Society

作者： Jung-Min Lee Dong Hwal Lee HeeTae An Nam Huh Myoung Kook Kim Man Hyung Lee Departement of Interdisciplinary Program in Mechatronics Pusan National University Susan Korea Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea School of mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

The positioning problem of mobile robot is an important part of control problem for mobile robot. Dead Reckoning is widely used for positioning of mobile robot. However this method has problems because it accumulates estimation errors. In this paper, we propose a new method to increase the accuracy of estimated position using the U-SAT (Ultrasonic Satellite system). U-SAT is composed of a distance measurement using ultrasonic wave and the position acquisition in the world coordinate using the GPS. It is shown that we will be able to estimate the position of mobile robot precisely, in which errors are not accumulated. The experimental results show that the proposed method is enable to estimate the position of the mobile robot.

关键词： Satellites Mobile robots Robot kinematics Global Positioning System Orbital robotics Service robots Estimation error Distance measurement Uncertainty Machine vision

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Analysis of UPS (ultrasonic positioning system) using DGPS

Analysis of UPS (ultrasonic positioning system) using DGPS

引用

Annual Conference of Industrial Electronics Society

作者： Su Yong Kim Dong Hwal Lee Hee Tae An Sang Hun Lee Young Ho Koh Man Hyung Lee Department of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Depatment of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea School of Mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

In this paper, the position of a mobile robot using DGPS (differential GPS) and UPS (ultrasonic positioning system) is measured and the performance of UPS is analyzed using DGPS. UPS is absolute positioning system using ultrasonic waves and has better performance in low price than the other absolute positioning systems. So in order to evaluate the performance, UPS is compared with the RTK (real-time kinematics) method, which is of the most accurate methods in the DGPS. As a result, the possibility of using UPS can be discussed as pseudolites or pseudosatellites in the place where GPS is not available.

关键词： Performance analysis Global Positioning System Robot kinematics Mobile robots Satellites Electronic mail Position measurement Ultrasonic variables measurement Uninterruptible power systems Robot sensing systems

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3-D position analysis of an object using a monocular USB port camera through Java

3-D position analysis of an object using a monocular USB por...

引用

IEEE International Symposium on Industrial Electronics (ISIE)

作者： Dong Youp Lee Chang Ho Ji Hee Kwon Ha Seung Gweon Jeong Joong Eup Keh Keun Kug Choi Chung Duk Kim Man Hyung Lee Department of Interdisciplinary Program in Mechatronics Pusan National University South Korea Department of Intelligent & Mechanical Engineering Pusan National University South Korea Aircraft Division Defense Quality Assurance Agency South Korea Ground Vehicle Division Defense Quality Assurance Agency South Korea Technical Center Samsung Techwin Plant #3 South Korea Korea Science and Engineering Foundation South Korea School of Mechanical Engineering Pusan National University busan South Korea

ISBN: (纸本)0780370902

This paper's purpose is to obtain 3-D information by using a monocular camera. This system embodies to obtain the height of an object by using a trigonometry method between a reference point of circumstance and an object. It is possible to build up a system regardless of operating system, and then set it up. A USB port camera is used everywhere without a capture board. The Internet can be used by using applet and JMF. The authors regard the camera as fixed and they have developed a real-time JPEG/RTP network camera system using UDP/IP on Ethernet.

关键词： Universal Serial Bus Cameras Java Equations Mechanical engineering Monitoring Quality assurance Humans mechatronics Aircraft

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