This study is to determine guideline to reduce carbon footprint for organization of medium and small hotels in Thailand using the Carbon Footprint for Organization (CFO) according to Thailand Greenhouse Gas Management Organization (Public Organization). Conducting with 2 represented medium and small hotels the results showed that the overall carbon footprint average of 2013 was 553t.Co2-e. Considering concentration index by number of guestrooms the carbon footprint was 18.81 kg.Co2e/room-night 221.16 kg.Co2-e/m2 by total floor area and 11.65kg.Co2- e/personby guest. The dominant source of carbon footprint was use of electricity 465t.Co2-e(83.06%). Base on this assessment to use of air conditioning was 60.09 % water heater 17.64 % lighting equipment 15.05 % and other 7.22 % of total electricity used. Therefore guidelines for carbon footprint reducing of the representative hotel were to use technology to reduce electricity consumption for air conditioning water heater and lighting respectively. Based Approach to Reducing Carbon Footprint found that small and medium sized hotels can reduce emissions per year 24.87 t.CO2-e representing the ability to reduce greenhouse gas emissions by up to 4.49% or financial projections be able to save money 171.202 baht per year.

This research was studied to determine the optimum value for condition based maintenance of split type air conditioner by measuring the temperature humidity and flow of air through the fan coil unit. Measuring electric current and voltage of split type air conditioner. Find the energy efficiency ratio (EER) based on the actual use compared to the EER was determined by the manufacturer. To find the suitable maintenance and cleaning air conditioner for each. In conducting this research is split type air conditioner. Rated cooling 25000 Btu/hr. Rated power 2291 watts. Rated current 9.89 amperes. Rated voltage 220 volts single phase. Using the refrigerant R-22.EER 11.02Btu/hr/watts. Running 24 hour sperdayat a temperature of 18°C. Research indicates that the EER before maintenance is equal to6.23Btu/hr/watts. After maintenance is the EER of 20.2Btu/hr/watts or EER value the increase was 69%. Thus preserving the EER of air conditioner. The condition based maintenance in reasonable time is one way that can help save energy.

The objective of this research is to develop a small and low-cost weather station. The station will be wireless transmit and receive data via radio signals. The 45mW solar cell will be used as a solar irradiance sensor which is very expensive for the weather station and the PIC18F97J60 controller will control the transmitter and receiver system. Moreover the author has developed the weather monitoring software by using LabVIEW. After testing the measurement percentage errors with the reference weather station the results showed that the relative humidity measurement error is equal to 3.106% the temperature measurement error is equal to 0.685% the wind speed is about 4.527% the wind direction measurement error is equal to 5.236% and the solar irradiance measurement error is equal to 0.501%. The longest working distance between the weather sensor and receiver unit is equal to 145 meters.

This research aims to develop a web-based instruction (WBI) applied in the computer technology course. The proposed WBI composed of the following components: lessons of the computer technology course pre-test and post-test exam: determining the effectiveness of the proposed work and user satisfaction questionnaires. It is also evaluated a study achievement and a usage satisfaction by using efficiency and effectiveness test of lessons and satisfaction test of users. In this work users are the second year students in major of Computer Technology Faculty of Science and Technology Rajamangala University of Technology PhraNakhon for 30 students. For experiments the results show that its efficiency is 80.13/83.67 which are met studied the proposed WBI are also higher than students who studied with ordinary courses at the statistical significant level 0.05 furthermore an average of students’ satisfactions score is 4.20 which determines students satisfy with the proposed WBI at a high-level. Finally it can be concluded that the proposed WBI is effective

This research aimed to study the awareness of impacts on global warming that is relevant to Home Economics knowledge base of Home Economics students Suan Dusit Rajabhat University and compare their awareness of impacts on global warming relevant to the Home Economics knowledge base considering their gender and year of study. The sample was 254 undergraduate students from Home Economics of Suan Dusit Rajabhat University. The research tool was questionnaire. The study revealed that the majority of the sample had been aware of impacts on the global warming relevant to Home Economics knowledge base in a high level. Most of them agreed with the awareness point that students wore the clothes that were appropriate with climate; for example they chose to wear light and thin clothes to reduce workload of air conditioners the students chose food containers made from natural materials instead of Styrofoam containers to reduce waste that took long time to decompose and they planted trees at their residences to reduce home temperature respectively. Comparing the awareness categorized by gender and year of study it was found that the students of Suan Dusit Rajabhat University of different genders had different levels of awareness of the impacts on the global warming relevant to Home Economics knowledge base. The awareness of female students was higher than that of male students and as for year of study the students of Suan Dusit Rajabhat University had different levels of the awareness of the impacts on the global warming relevant to Home Economics knowledge base. The second year students had higher awareness than the first third and fourth year students.