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.

This research has the objectives for studying the information and communication technology (ICT) usage of university students and relationships between factors of information and communication technology (ICT) usage those affecting the digital university policy of Rajamangala University of Technology Phra Nakhon. Samples are students who are studying bachelor degree in 9 faculties at Rajamangala University of Technology Phra Nakhon and are systematically randomed from the population of 11899 at 95% confidential level with the sample size of 387 from the calculation. Questionnaires about the information and communication technology usage of the students related with the Digital University policy have been used in this research. Descriptive statistics used in this research are Frequency Percentage Means (𝑥𝑥̅) and Standard Deviations. Referential statistics used are t-test Independent and One-Way Analysis of Variance. The research found that different personal factors including genders ages classes and faculties did not vary the opinions of the students about their planned behaviors. Different personal factors including genders ages classes and faculties did not vary their opinions about the intention of information and communication technology usages. Different personal factors including genders ages classes and faculties did not vary their opinions about the information and communication technology usage behaviors. Different personal factors including genders ages classes and faculties did not vary their opinions about the Digital University policy. Opinions about the planned behaviors are positively related in low level to the opinions about the intention of information and communication technology usages statistically significant at the .01 level. Opinions about the intention of information and communication technology usages are positively related in moderate level to the opinions about the information and communication technology usage behaviors statistically significant at the .01 level. Finally opinions about the information and communication technology usage behaviors are positively related in low level to the opinions about the Digital University policy statistically significant at the .01 level.

The system of recording time in - out through the online system will help facilitate those who enter - leave the agency. That can record the time to attend activities anywhere and help people work easier by bringing information from a central database to connect with users. Nowadays the way of work has begun to go into a digital format that only requires fast accurate and convenient data linking. Entering or importing more than necessary data will result in delays. Authentication when entering and exiting an agency is useful in identifying identity and location by storing it as a database for further analysis. Therefore this research presents the application of technology to study and develop an online time attendance system. instead of scanning this hand clock machine and signing of time stamps

In Klong Rangsit Pathumthani province where the water entering was filtered by a prototype quality water machine and autonomously controlled by pumps and sensors this research tested improvements to water quality. It employs a total dissolved solid and temperature sensor as part of the consideration of the water quality criterion in accordance with the water quality requirements of the Pollution Control Department and is 99% successful in treating contaminants in water. According to the Pollution Control Departments water quality criteria which are divided into four main categories: very good water quality good water quality degraded water quality and very degraded water quality it is used in the analysis of the division of the four categories of water quality. Machines for producing good quality water to maintain water sanitation during COVID-19 and anticipated flooding across the nation. This is simple to use. Since the made quality water machine prototype has a battery to back up the power for the pump and UV lamp control by filtering water through various stages of a quality water producer prototype it is simple can generate clean water for usage and can be carried. No energy is used and there is no residue filtration effluent. It eliminates 99 percent of water pollutants and has no color.

During the epidemic of the coronavirus covid-19 single-use plastic containing products were in high demand across the community and may not be cost effective to recycle. However repurposing such materials can reduce their environmental impact for instance plastic foam waste can be made into pots for planting different types of plants and trees. By mixing the foam with a suitable cement in a ratio of 1:1 a large range of pot diameters from 4.5-10 inches can be produced suitable for both indoor and outdoor planting requirements. These pot products suitable for growing plants of all sizes are durable unbreakable water tight. Therefore it is a product that repurposes the leftovers from the community and may even add value. This strategy helps reduce the problem of waste and in particular encourages replenishment of green space to nature and the environment which also helps to combat global warming.