Chayan Boonyarak and Others. Development of Production Process in Drying Seasonal Fruits at Industrial Scale Using Solar Energy Dryer, Physics Department, Naresuan University, Phitsanulok, 275p. The study was supported by National Research Council of Thailand (NRCT) in the academic year of 1995.

W. Rakwichan, C. Boonyarak, and S. Sukjai. The Data of Thermal-Energy Comsumption in Industrial Drying in Lower Northern Area, Naresuan University, Phitsanulok, 43p.The study was supported by NRCT in the academic year of 1992.

C. Boonyarak. A Study of Science Teaching Problems in Secondary Schools in Lower Northern Region of Thailand. Physics Department, Naresuan University Phitsanulok,77p. The study was supported by NRCT in the academic year of 1992.

W. Rakwichian, C. Boonyarak and Others. Developing of Solar Fruit Dryer at Industrial Scale, Naresuan University, Phitsanulok, 319p. The study was supported by NRCT in the academic year of 1992.

Chayan Boonyarak, Sangwal Pengpad, and Sombat Saithon. Producing Software for Computer Assisted Instruction in Nuclear Physics at University Level, Naresuan University, Phitsanulok , 87p. The study was supported by NRCT in the academic year of 1991.

Time-scries photometry for the high-amplitude S Scuti star AD CMi was made in 2005 and 2006. The high-quality photometric data provided in the literatures were used to analyse the pulsation of the star, with the derived multiple frequencies fitted to our new data. Besides the dominant frequency and its harmonics resolved, one low frequency (2.27402 c/d) is discovered, providing a reasonable interpretation for the long-noticed luminosity variation at the maximum and minimum light. Combining the nine new times of light maxima, determined from the new data, with the 64 times collected from the literatures, we analyzed the long-term variability of AD CMi with the OC technique. The results provide the updated value of period of 0.122974478 days, and seem to be in favor of the model of combination of the evolutionary effect and the light-time effect of a binary system for AD CMi. Some parameters of the binary system …