ABSTRACT:Various output heaters were extruded with acetylene black-filled platinum-catalyzed silicone rubber. The resistivity-temperature behavior of extruded heaters exhibited a positive-temperature coefficient (PTC) effect without any negative-temperature coefficient (NTC) effect. Resistivity and thermal reproducibility of the extruded heaters were investigated during heating and cooling cycles at an applied voltage of 220 V. These heaters initially showed poor reproducibility of resistivity during the repeated cycles and this effect increased significantly as the acetylene black content decreased. PTC effect and electrical reproducibility were improved significantly during the thermal ageing process.

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Recent development in the areas of information and communication detonated the emergence of a new paradigm of ubiquitous and smart environment. A ubiquitous environment is a technology that the computer and communication are to control and monitor all the matters without human's direct involvement in control. So this paper purports to explain about the general installation method and the efficacy and how to use the monitor and control system in the growing environment by using the wireless sensor network technology, and to design and propose the smart farming system with convenience and easiness to use even in the narrow environments.

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Researching and developing mobile robot are quite important. Autonomous driving of mobile robot is important in various working environment. For its autonomous driving, mobile robot detects obstacles and avoids them. Purpose of this thesis is to analyze kinematics model of the mobile robot and show the efficiency of type-2 fuzzy self-tuning PID controller used for controling steering angle. Type-2 fuzzy is more flexible in verbal expression than type-1 fuzzy because it has multiple values unlike previous one. To compare these two controllers, this paper conduct a simulation by using MATLAB Simulink. The result shows the capability of type-2 fuzzy self-tuning PID is effective.