Thailand is a country where passenger cars up to 7 people the specified cylinder capacity does not exceed 1500 CC. Most used in Bangkok which is a popular vehicle. Therefore this type of vehicle was chosen to collect data to study behavior and create a driving cycle the selection of the data collection route includes: Ratchadaphisek Road - Rama IV Road Phaholyothin Road and Rama III Road - Narathiwat Road etc. Which the road is in the business district which has a heavy traffic volume. At present there is an epidemic of Covid-19 the government therefore has measures to lockdown. It affects the traffic conditions greatly compared to the normal situation. Therefore data collection was performed on-board measurement. and grouping the time series clustering. In the part of the equipment used to store data including : KYOWA Model EDX-200A It is a highly accurate data storage device. by connecting to Global Positioning System: GPS sensor and connect to notebook The results of the data collection to create a driving cycle of 3 routes in the morning and evening (Peak time).It was found that most of the speed patterns used to create driving cycles were low speed patterns. The frequency of the speed range is close to the real driving and the speed range is in the range of 0-10 km/h. Which show that the traffic conditions on 3 routes are very dense. but driving in some parts can use speed and have the following movement patterns including : acceleration decelerationconstant speed stationary. Each route has different values.

As the worlds energy resources are currently insufficient to meet human needs energy-saving and energy-efficient appliances have to be invented that are readily available and accessible to everyone. To have enough energy to meet human needs and to reduce the waste from the waste of energy resources each year to meet the demand for energy that can be produced by itself. This research presents the construction of a portable DC to AC voltage converter or “Constrution of Portable DC to AC Voltage Converter” which can be operated through a solar cell. By charging energy from the sun and storing energy at the battery. and can also bring electrical energy to use inside the pressure converter There is an inverter circuit that converts voltage from DC to AC so that AC power can be used in daily life. which has a lighting system power socket USB port and helps reduce electricity bills in the house and is convenient to carry From the experimental results of creating a portable DC to AC voltage converter it can be used in daily life and saves electricity and is also clean energy from sunlight that does not cause pollution like a generator that uses oil. be a generator

The research objective was to study the market mix factors (7Ps) that affect the decision to use the domestic airline service of Thai passengers at Suvarnabhumi Airport. The population used in the study was Thai passengers that used four domestic airlines at Suvarnabhumi Airport namely Thai Airways Thai Smile Airways Bangkok Airways and Vietjet Airlines. The sample number was 100 passengers per airline or a total of 400 people. The statistics used in the data analysis were percentage mean standard deviation mean difference analysis (One-way ANOVA) and multiple regression analysis. The study results found that most of the passengers who used domestic airlines focused on the overall marketing mix factor (7Ps) at Very Important level. That affected the overall decision to choose the domestic airline service at Very Important level. The hypothesis testing revealed that the different demographic factors in terms of gender age status educational level and average monthly income affected the selection of domestic airlines differently. Marketing mix factors (7Ps) on products physical evidence and process affected the selection of domestic airlines at a statistically significant level of 0.05.

The research objective is to study the behavior and community perceptions related to Corporate Social Responsibility (CSR) activities of WHA Industrial Zone Saraburi. The population is the 400 samples from the communities surrounding WHA Industrial Estate Saraburi consisting of four sub-districts namely Nong Pla Mo Sub-district Nong Pling Sub-district Bua Loi Sub-district and Kochasit Sub-district Nong Khae District Saraburi Province. The questionnaire was used as a tool to collect data. The statistics used were descriptive statistics including frequency percentage mean standard deviation. Inferential statistics were also used. The results showed that most of the respondents were female aged 20-30 years with married status a bachelors degree holder or equivalent a private company employee with the average monthly income of 20001 - 30000 baht and 4-6 family members. On the community behavior it was found that the aspect with the highest average of the community behavior towards Corporate Social Responsibility (CSR) activities of the sample group was acceptance with the mean of 3.55. On the communitys perception of Corporate Social Responsibility (CSR) activities it was found that the aspect with the highest average of the communitys perception of Corporate Social Responsibility (CSR) activities of the sample group was the information perception of CSR activities with the mean of 3.50. The hypothesis testing results revealed that the communitys behavior and perception were highly positively correlated with the CSR activities of WHA Industrial Zone Saraburi with statistical significance at 0.01.

This research had the objective to design and develop power production from daily life leftovers for their highest benefit of utilization by using the principle of quality function development and power generator that changed mechanical energy into electric energy. In developing electric generator product from air conditioner condensing unit the researcher found that there were 4 important factors including speed installation distance size and cross-sectional area of the fan and the test was conducted between 8.00-17.00 hours. The researcher collected the data and analyzed the test result and found that the best result in the test was to install the product at the distance of 10 cm by using an 18 fan in order to acquire the best voltage and the data were collected so that they could be implemented in developing such product in the future.