This research aimed to study the causes of changes in water quality and compare the water quality in Khlong Bang Khen Mai when the seasons and sampling points are different. These factors may cause a change in water quality. A total 50 of water samples were collected from 5 sampling points each point approximately 300 meters apart for a total distance of 1.5 kilometers. They cover three seasons such as winter (October 2020 to February 2021) summer (March to May 2021) and rainy (June and July 2021). Three parameters of this research which consist of both the chemical and physical quality parameters are pH Dissolved Oxygen (DO) and Electrical Conductivity (EC). The result shows that the average pH has ranged from 7.10 - 7.74 the dissolved oxygen (DO) was in 1.80 - 2.84 mg/L and the electrical conductivity (EC) was in the range of 327 - 517 μs/cm. A two-way analysis of variance is a statistical method used to compare the water quality in Khlong Bang Khen Mai. The results indicate that the test differences between seasons affected the change in water quality in all parameters with a statistically significant level of 0.05. Afterward the comparison of multiple comparisons by Scheffes method showed that the pH and dissolved oxygen (DO) in the rainy season were significantly different from winter and summer at the level of 0.05. For the electrical conductivity (EC) there was significant differences between summer and winter at the 0.05 level.

The purpose of this research was to design and develop products from polyester yarn scraps according to an eco-economic design concept. The workpiece is formed by the compression molding machine used in the industrial system. Researchers studied the waste materials used in various processes of manufacturing in textile establishments to increase their value by designing a new product or by developing polyester yarn scraps. According to the research process with the upcycle method that focuses on using resources for maximum value by turning the scarps into new products and eco-design concepts to increase the value of plastic polymer waste one of the concepts of resource efficiency (4Rs) by recycling and design process. The research focuses on the process of polyester yarn scrap forming especially from the textile industry with the potential to be re formed to create new products with beautiful shapes and unique patterns. From polyester yarn scarps through the extrusion process. By using the compression molding machine with a compression force of 80 tons the temperature range and the time are controlled appropriately. Under the mold prototype hat from or flash mold.

The goal of this research is to: 1) create a short interactive film titled select 2) to evaluate the quality of a short interactive film titled select 3) To investigate how satisfied audiences are with interactive short films titled select and 4) to provide suggestions and launch a campaign to minimize the number of pregnancies. Using sample groups: The following were the sample groups utilized in the study children between the ages of 13 and 18 who utilize this age range because there is a proclivity towards becoming pregnant early before age appropriate as a result of selecting a purposive sampling. Utilizing questionnaires to get information the following statistics were used to examine the data the Standard Deviation (SD) and Mean The studys findings revealed that overall The results of the assessment were extremely suitable (𝒙̅ =4. 0 0 S.D.= 0 . 9 6 ).The impact of audience pleasure with interactive short films titled select was discovered to be as follows with an average score of (𝒙̅ =4 . 0 8 S.D.=0.86) the overall evaluation findings were at a highly adequate level

Teaching and learning in the 21st century is not as focused on lecture notes as in the past. Students must listen to the teacher and answer exactly as the teacher teaches but emphasizes as the instructor is a coach or a facilitator is not a teacher that teaches only and must be organized Learning for change (Transformative Learning) is learning to make changes within oneself including worldview affective attributes cognitive attributes and behaviors (psychomotor attributes) is to change dramatically complete in all aspects it is a change known as the Holistic Change” (Thitirat Raksasri 2019). Learning with digital technology is considered a learning style suitable for the new generation. Because it is a model that can use technology to be useful in teaching and learning both inside and outside the classroom. Result in new learning styles such as massive open online courses (MOOCs) or other learning channels such as video computer games social media and audio media (OKMD 2019). It is therefore a good opportunity for students to be able to choose a learning style that is suitable for themselves. According to a study by Jiratan Prayaruwong (2019). It was found that learning English using digital media technology allows learners to develop and develop proficiency in English. It can be used to study and search for knowledge and information by oneself in the 21st century and achieve complete and effective lifelong learning skills. Therefore teaching and learning English integrated with digital technology and practical training it is a suitable idea for the development of English communication skills of Thai youth in the 21st century and in line with the education reform policy the national strategy for the development and enhancement of human resource capacity of Thailand at present (Nattaphon Teepsuwan 2019).

The purposes of this research were to 1) study marketing opportunities of Samutsakorn’s processing herbal product with betel leaf 2) present the marketing strategy of startup business in processing herbal product. with betel leaf The samples were 1) person has problem about skin and person interest for thai herbal product 2) entrepreneur of startup business about processing herbal product with betel leaf 3) farmer group grow betel tree in Samutsakorn Province. The research instruments were depth interviewing and descriptive analysis. According to the research process it found that the great market trend for Thai herbal product and increasing capability of entrepreneur of startup business about processing herbal product with betel leaf is market opportunities for processing herbal product. Moreover marketing mix strategies of processing herbal product with betel leaf consisted of product strategies price strategies place strategies promotion strategies which could be used to recommend the marketing strategies in order to meet future local and national market needs.