The objectives of this experimental research were: 1) to develop Web-based Instruction (WBI) on “Op-Amp and Linear IC Simulation Using Multisim Version 11.0 Case Study of Chainat Technical College 2) to evaluate the developed WBI 3) to compare the students’ learning achievements before and after using the developed WBI and 4) to find the students’ satisfaction after the developed WBI. The sample of this research was 30 students in Vocational Diploma at Chainat Technical College in the academic year 2/2012 selected by purposive sampling method. The tools used in this research were the six lessons of the developed WBI using Moodle pretest exercises posttest and worksheets. The results of this research were shown as follows: 1) the developed WBI included 6 learning lessons. 2) the efficiency of the WBI was 83.14/80.20 higher than the criteria. 3) the students effectiveness after using the developed WBI was significantly higher than before using it at .05. 4) the students’ satisfaction was at a good level. In conclusion the developed WBI can be used for the target group properly.

This paper presents a quadrature sinusoidal oscillator providing sinusoidal signal which differs in phase. The features of the proposed circuit can be electronically controlled. The proposed circuit consists of 4 operational transconductance amplifiers(OTAs) and 2 grounded capacitors which is able to control the oscillation frequency(OF) and condition of oscillation(CO). To confirm the performance and theory of proposed circuit is verified by PSPICE simulations and the experimental results can be achieved by using the commercial parts(LM13700s). The power consumption is about 33.3mW at supply voltages

This research was to used Lanna wisdom project-based learning activities in sufficiency economy of sustainable development courses for undergraduate students Rajamangala University of Technology Lanna Chiang Mai. The objectives of this research were to development of Lanna wisdom project-based learning activities to study students’ learning achievement about local wisdom and to study students’ satisfaction towards Lanna wisdom project-based learning activities. The instruments were included lesson plans on local wisdom pretest and posttest using Lanna wisdom project-based learning activities tests assessment of students ability to present Lanna wisdom project-based learning activities according to actual conditions and students’ satisfaction towards Lanna wisdom project-based learning activities questionnaires. Research was assigned to students learning activity by Lanna wisdom project-based pretest and posttest using Lanna wisdom project-based learning activities tests evaluated students’ learning achievement and students’ satisfaction towards Lanna wisdom project-based learning activities. The research findings were as follows; 1. Lanna wisdom project-based learning activities was associated knowledge of Lanna wisdom with sufficiency economy for application in daily life 2. Students’ learning achievement about local wisdom in lesson 4 after using Lanna wisdom project-based learning activities are increase at statistically significant level of 0.01 and capable of Lanna wisdom project-based learning activities presentation at a higher level. 3. Student overalls satisfaction towards Lanna wisdom project-based learning activities at the highest level. The recommendation of research that universities should support of appropriate teaching curriculum by project-based learning activities.

During the daytime solar cells can be used in terms of meteorology because the variations of the current obtained from solar cells are associated with changes in daily climate. The case study of the comparison between the surface temperature and the different current (Ipv_d) obtained from the solar cells in the periods of November 2011 to February 2012 which known as the winter period of Thailand had been conducted. The result showed that it was possible to observe the decreased surface temperature at the time that the increased Ipv_d was more than 6000 mA. Vice versa the decreased surface temperature would not be observed when the Ipv_d was below 6000 mA. The decreased surface temperature may reflect the influence of the traveling high pressure area moving to cover and collide with the steady-low pressure area at the study area. The result of the collision caused extensive cloud cover resulting in increasing Ipv_d.

The purposes of this research were : 1) to develop Web-Based Instruction (WBI) on Official Letters part of the Word Processing Applications Subject using Demonstration Technique; 2) to evaluate if the WBI meets Meguigans efficiency criterion; 3) to compare learning achievements of learners before and after studying by the developed WBI; and 4) to evaluate students’ performance after studying the developed WBI. The sampling group recruited with purposive sampling method were 20 second-year vocational certificate students who registered in the second semester of academic year 2012 majors in Business Computer at Bunharn-Jamsai Polytechnic College Suphanburi province. Applied research tools included one unit of WBI’s evaluation form pre-test and post-test learning achievement test and WBI post-test Students’ performance assessment form. Applied statistic tools included Meguigans efficiency value t-test mean and standard deviation (S.D.) Research findings showed that 1) the efficiency of developed WBI was 2.26 which higher than the Meguigans’s standard value at 1.00. 2) post-test learning achievement was statistically significant higher than pretest at .05 3) students’ post-test performance was at good level. We therefore could conclude that the developed WBI can be utilized as teaching material for students with different computer background.