จำนวน Repository ( 1852 )

Speed Control System Design in Bicycle Robot by Low Power Method
Speed Control System Design in Bicycle Robot by Low Power Method

This paper presents compare results performance between two conventional controllers for bicycle robot. The bicycle speed control system was a highly nonlinear model multivariable and absolutely unstable. It has used for testing various design control techniques for low power. The objectives of this paper had to developed speed control which derived the mechanic model and experiment. Controllers are Proportional-Integral-Derivatives (PID) and on-off dynamic control. The dynamic system which also includes not stable friction effects the linear zed system model is used as a basis for the design to apply to speed. Computer simulation and experiment have been done controller are capable to control output speed wheel control system successfully. The results show PID controller better then on-off dynamic controller.

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Low Rate Wireless Sensor Network Data Logger with Multi-core Microcontroller
Low Rate Wireless Sensor Network Data Logger with Multi-core Microcontroller

This paper presents the development of a data logger which collects interesting data via low rate wireless sensor network not expensive low power consumed sensor node. The system is wireless and more flexible to expand and substitute sensor nodes by add proper configuration wireless sensor node. System controller uses embedded small multi-code microcontroller Propeller Chip by Parrallax Inc. This chip contains eight processors (Cogs) inside. All eight processors can perform tasks simultaneously or with coordination from other processors. It comprised of Xbee chip to perform wireless sensor network that work with 802.15.4 protocol. Data is collected and stored in Micro SD memory small size and not expensive. It transfer data from data logger to master computer system via wireless network. The experimental results show that we can use single microcontroller based on data logger system small size and flexible. To expand this system with Propeller chip it can monitor data collected by system directly from this chip by generating computer screen monitor signal.

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Academic Works for Academic Position of the Faculty of Liberal Arts Lecturers
Academic Works for Academic Position of the Faculty of Liberal Arts Lecturers

This research aimed to study the conditions of academic work productivity; to study and understand rules and regulations so as to achieve academic position as well as the opinions on the academic work productivity and the need to support the academic work productivity of 73 of the lecturers of the Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon. Data analysis was done by SPSS. This study Data statistics were percentage mean and standard deviation in terms of knowledge and understanding of rules and regulations in achieving academic position the lecturers of Faculty of Liberal Arts understood the rules and regulations at the medium level The reason why they did not want to make an academic work was the lack of motivation. The obstacle in making the academic work mostly was because they were engaged in other works. As for the need to be supported in making the academic work the lecturers required the faculty to provide them with various means of communications. T-test result showed that different obstacles significantly differ between different sex at .05 level.

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การวิเคราะห์ความอยู่รอด : การศึกษาการออกกลางคันของนักศึกษา ปวส. สายช่างอุตสาหกรรม มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร วิทยาเขตพระนครเหนือ
การวิเคราะห์ความอยู่รอด : การศึกษาการออกกลางคันของนักศึกษา ปวส. สายช่างอุตสาหกรรม มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร วิทยาเขตพระนครเหนือ

The objectives of the study were to find the survival probabilities the hazard rates of dropping out of the technical diploma level students at Rajamangala University of Technology Phra Nakhon North Bangkok Campus and the factors influencing on the hazard rates of students dropout. The sample was the students enrolling in the university in 2005. The study found that for the first semester the survival probabilities of students in all divisions were high ranging from 0.9210 to 1.00. For the second semester the survival probabilities of students in all divisions ranged from 0.7820 to 0.8815 except Industrial Technology which had a maximum value of 0.9295 and Metal Technology which had a minimum value of 0.6271. For the third and the fourth semester there were 6 divisions which had survival probabilities ranging from 0.7142 to 0.7971. They were Tool and Die Making Computer Technology Electrical Technology Electronics Automatic Machine and Production design. There were 4 divisions which had survival probabilities ranging from 0.8275 to 0.8732. They were Mechanical Tool Technology Business Computer Mechanical Power and Industrial Technology. The division of Metal Technology had the minimum value of 0.5932. For the first semester the hazard rates of dropping of students in all divisions were low ranging from 0.00 to 0.0822. For the second semester the hazard rates of dropping of students in all divisions ranged from 0.1260 to 0.2458 except Industrial Technology which had a minimum value of 0.0730 and Metal Technology which had a maximum value of 0.5221. For the third and the fourth semester the hazard rates of dropping of students in all divisions ranged from 0.1355 to 0.2962 except Metal Technology which had the maximum value of 0.5932 and Tool and Die Making which had the value of 0.3364. The factors influencing on hazard rates of students dropout were place of previous school region of previous school and grade point average of previous school. The hazard rate of dropping of students graduating from schools in the central region (not including Bangkok Metropolitan Area) was 43.8% (0.562 times) less than the hazard rate of dropping of students graduating from schools in Bangkok Metropolitan Area. The hazard rate of dropping of students having grade point average of 3.10-3.50 and 3.51-4.00 from previous school was 43.1% (0.569 times) and 63.7% (0.377 times) less than the hazard rate of dropping of students having grade point average of 2.00-2.50 respectively.

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Rajamangala University of Technology Phra Nakhon : Case study
Rajamangala University of Technology Phra Nakhon : Case study

Since its original inception under the name of Rajamangala Institute of Technology and now as the Rajamangala University of Technology Phra Nakhon RMUTP has a long history of initiating research projects in order to help develop and improve the overall well-being of the Thai population and the countryûs economy. The Banana Product Development Project was one such research project that was established to serve the community. Its objective was to solve the banana problem in the local Thai community; that is the problem of having more bananas as a result of low consumer demand. The project findings would therefore create new innovations to help the community and develop its economy. This research project was started in 1976 and from around 1997 has been transferring the research result to the communities. The project is still currently active and highly successful. It has won awards in both national and international competitions as a result of successful developments which include for example the establishment of a Thai Banana Club Banana Product Development as a result of extended research and technological improvements in order to help the community the economy and local industries

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