This research aims to 1) to study the personal factors of Thai and foreign tourists towards their buying decision making behavior in spa products; 2) to study the current situation of buying decision making behavior for the development spa products entrepreneurs to drive the strategy of Thailand 4.0 and 3) to create behavior patterns of purchasing decisions to develop spa product entrepreneurs driving the strategy of Thailand 4.0. The research used mixed methods qualitative and quantitative. The researcher applied qualitative methods by interviewing 21 selected key informants. The data obtained from qualitative was used to construct the questionnaires which were used to gather quantitative data and analyzed by multiple classifications. The researcher determined the sample size to represent the population using the G*Power program. The research tools used in this research were 1) an in-depth interview and closed-ended questionnaires for qualitative research and 2) a questionnaire obtained from the qualitative research using the Delphi technique as a reviewed questionnaire for quantitative research. The questionnaires were distributed to the 305 samples. The results of the hypothesis testing of personal data were as follows: gender nationality age education level source of information that brought them to Phra Nakhon Si Ayutthaya Province and participants traveling to Phra Nakhon Si Ayutthaya Province are the factors that affect buying decision making behavior spa product of model buying decision making behavior for the development spa products entrepreneurs to drive the strategy of Thailand 4.0 strategy. The result of hypothesis testing factors affect the buying decision making behavior for spa products come into 6 factors are local identity product usage buy as a souvenir repeated buying information from reliable sources and the interpersonal factor of entrepreneurs or salespeople. All of these results comply with the assumptions.

According to the research entitled “the innovative engine prototype powered by diesel and LPG as fuel for agricultural” in 2019 the problems found while using the engine were as follows: the accumulated heat in the auxiliary combustion chamber reached 300 C in case of gasoline engine use and a lot of black smoke in the exhaust was found at the speed higher than 1800 rpm in case of a diesel engine use. In order to extend the research and solve two foresaid problems the objectives of this study were 1) to develop an auxiliary combustion chamber for cooling 2) to develop a scalable gas-air mixing device and 3) to compare diesel and LPG consumption rates by modifying a small diesel engine Yanmar version TF120DI to install LPG fuel systems and ignition system. In addition a gas-air mixing device was modified while an auxiliary combustion chamber was developed to reduce the compression ratio to the same level as the gasoline engine for replacing the position of the original diesel fuel injector. This method could support LPG fueling only whose function was characterized by the function of a gasoline engine. The auxiliary combustion chamber could be removed and then installed a diesel injector to return using diesel fuel. From an experiment to compare the modified engine operating as a gasoline engine it was found that the temperature of the auxiliary combustion chamber and the temperature of the engine cylinder head of Honda GX160 were measured at the maximum speed of 182 C and 186 C respectively. It was found that carbon monoxide content was 0.41 % and 1315 ppm hydrocarbons. When used as a diesel engine it was found that the black smoke was exhausted at 1.5 % which was similar to the diesel engine before the modification. From the experiment of using the power engine for pumping water with an Irrigation propeller pump with the diameter of 8 inch at a constant engine speed of 1000 rpm it was found that the average diesel usage was 0.65 kg/hr or about 0.77 L/hr with the cost of 21.00 Baht/hr and if using LPG as fuel the average LPG consumption was 0.57 kg/hr with the cost of 13.71 Baht/hr which could save up to 34.71 % of costs.

This research is to develop an internal inventory management system. Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon To evaluate the results of the use of information systems for managing supplies within the Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon The data was collected between October 2019 and September 2020 as a survey research using questionnaire tools. It consists of 4 parts: 1) general information of the respondents which is demographic characteristics 2) current condition and needs of the parcel management system. Faculty of Liberal Arts University of Technology Rajamangala University of Technology Phra Nakhon 3) The efficiency of the procurement management system Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon and 4) satisfaction of the procurement management system. Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon With the sample groups in this research are Support personnel Under the Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon comprised of 21 persons. The data analysis used descriptive statistics for demographic characteristics. The study found that Current conditions and procurement development guidelines Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon Overall and from the bottom to the bottom including parcel payment Parcel picking Accounting for parcel control And material storage respectively efficiency of the parcel management system Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon Overall and each side Very level When sorting the efficiency of the parcel management system in descending order namely the information security aspect of the system. Aspects to meet the needs of system users Functional aspects according to the system function And the ease of use of the respective system and the users satisfaction with the parcel management system. Faculty of Liberal Arts University of Technology Rajamangala Overall and each side Very level When sorting the users satisfaction with the parcel management system descending namely the aspects of meeting the needs of the system users. Information security in the system Ease of use And functional aspects according to the systems function respectively

The product development of gluten-free Bake goods with Thai rice. The rice used in research is the product of the Baan Chanode community enterprise of Khlong Yong - Lan Tak Fa Community such as Nakhonchaisri brown rice and black rice. It is processed into rice flour as a substitute for wheat flour to make gluten-free pastry product contains cookies products Tuile cookies and tart dough. Product development of gluten-free pastries with Thai rice with Nakhonchaisri brown rice and black rice can be made into a gluten-free product. Products that contain more fiber. They have a natural color of rice at the same time it resulted in a lower products texture characteristic score. Which affects acceptance The proper packaging is beautiful the respondents rated it on a very satisfactory level. Consumer acceptance testing The development of gluten-free pastries made with 3 Thai rice of 100 people found that most of the testers more than 80% accepted the product development of gluten-free pastries with Thai rice.

The purpose of this study is to develop video media and find the effectiveness of practical fruits vegetable carving and banana leaf teaching to be efficient according to the criteria 80/80 and to study the students satisfaction towards video media of practical fruits vegetable carving and banana leaf teaching. The sample group used were 35 2nd-year undergraduate students Department of Home Economics Business Administration Faculty of Home Economics Technology from the Rajamangala University of Technology. Then divided into groups to estimate assessment form was used for media quality as well as student performance assessment form and also satisfaction assessment form was used data were analyzed using descriptive statistics and Inferential statistics. The results showed that video media of practical teaching fruits vegetable carving and banana leaf from 4 videos including 1. Vegetable carving 2. Fruits scooping and peeling 3. Petal folding from banana leaf and 4.Making ware from banana leaves. The overall media quality in terms of content is very good with an average score of 4.80 and a standards deviation of 0.18 The overall video quality is in very good condition an average score of 4.62 and a standards deviation of 0.42 which is effective 81.57/89.55 every performance exceeds the threshold which performs above the set regulative specified criteria of 80/80 the students satisfaction towards video media of practical teaching fruits vegetable carving and banana leaf overall all subjects were in the highest criteria with an average of 4.72 and standards deviation 0.48