The development of accessories for the sewing system aims to 1) To design and develop accessories for sewing system 2) To reduce the time of taking off the bobbin inserting the bobbin filling the bobbin and increasing the efficiency in the continuous sewing process. 3) To study consumer satisfaction towards accessories for sewing system The sample group used in the study was a sewing worker Monster Screen Factor Company Limited amounting to 20 people. The instrument used to collect data was a questionnaire on the satisfaction of the consumer group towards accessories. for sewing system and prototype accessory kit For the sewing system the amount of 1 set was randomly distributed questionnaire. Data analysis uses percentage statistics. Arithmetic mean and standard deviation The results of the study of preliminary data showed that most of the samples were female. less than 25 years old marital status Monthly employment and has an average monthly income of less than 15000 baht from a study of consumer satisfaction with accessories As for the sewing system it was found that most of the samples had the highest level of satisfaction. Accessories for the sewing system that could reduce the threading time the most followed by the accessories for the sewing system. Continuous sewing efficiency are suitable for use It is necessary for the garment industry. Improves the working efficiency of the sewing machine. and accessories for sewing system There is a quick and easy work process. with mean 4.95 4.70 4.55 4.40 and 4.25 respectively

This research study analyzes the problem of waste water from the burning of palm trees which are used as fuel for power generation of palm ash. It is used to ferment biogas as a fuel for power generation where a large amount of wastewater from the gas digester is completed. The wastewater is then pumped out of the gas digester. Biological in large quantities Therefore to study the analysis of wastewater to find a method for designing a wastewater treatment system from high voltage systems from the corona discharge principle when adding ozone it is necessary to analyze the chemical effects of the wastewater according to the standard values of the Department of Industrial Works.

The objective of this research was to study of rotary drying of high-moisture long pepper by using a combined hot air and infrared radiation. The experiment was carried out at the drying temperatures of 80 90 and 100 °C infrared power level of 500 W hot air velocity of 2.5 m/s and rotary revolution of 3 6 and 9 rpm. In this study two patterns were examined by the different drying conditions namely 1) hot air drying and 2) combined hot air and infrared radiation drying. The effects of above drying parameters on the change in moisture content of long pepper and specific energy consumption (SEC) of the drying system were investigated. The results showed that the combined hot air and infrared radiation drying was shorter drying time than hot air drying. The lowest total SEC during drying process of 26.77 MJ/kg water when the drying temperatures of 80 °C infrared power level of 500 W hot air velocity of 2.5 m/s and rotary revolution of 3 rpm were used.

This research aims to study the teaching style in various subjects. To study the teaching and learning management system based on a new way of life (New Normal) to develop teaching and learning styles and teaching management system based on a new way of life (New Normal) of the Faculty of Liberal Arts to be effective and in accordance with the strategic plan of Rajamangala University of Technology Phra Nakhon Data collection was conducted between October 2020 and September 2021. This was a survey research that used a questionnaire tool. It consists of 4 parts: 1) general information of students which is demographic characteristics 2) students opinions on online teaching and learning in the situation of COVID-19 3) students opinions on online examinations in the situation of covid-19 vid 19 and 4) students opinions on teaching and learning and online exams in the situation of COVID-19 with the research sample being students of the Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon a total of 590 students. Data analysis used descriptive statistics for demographic characteristics. The results showed that General information of students of Rajamangala University of Technology Phra Nakhon found that most of them were female. Studying in the first year. Most of them use mobile phones to study online. Use mobile phones for online exams. and like the teaching style in the classroom The level of students opinions towards online learning in the situation of COVID-19 was at a high level meaning that the students thought that the university should have more measures to help alleviate the burden of online learning expenses followed by more. Come students feel that online learning increases home expenses such as increased electricity bills. phone bill increase Students feel that studying online at home has a greater impact on themselves. Respectively and the level of the students opinions towards studying the online exam in the situation of COVID-19 was at a high level which was the problem with the internet signal during the exam at the most followed by the suitability of taking the exam for each subject in Google Form overall suitability of online teaching in each course The suitability of the applications used in the online exams for each subject respectively.

Ground grid design of substation is very important. It will help prevent the danger caused by the fault which causes the high step voltage and high touch voltage and may cause the operator to die. It also helps prevent damage to equipment and increases reliability for power systems as well. Currently the Gas Insulated Substation (GIS) has been built a lot especially in areas with limited space because it takes less space than the Air Insulated Substation (AIS). In order to create a substation of the GIS model instead of the AIS model. In order to create the GIS instead of AIS including the improvement or maintenance of the substation it is necessary to build another small substation to supply electricity to replace electricity from the original substation. However there are two substation stations in the same area may cause an increase of high-slope ground potential between the ground grid systems of both substations. It will cause high step voltage and high touch voltage while the fault is diminished. Therefore before improvement or maintenance of substation the ground grid distance and the size of the newly constructed substation must be analyzed that what effect on step voltage and touch voltage generation. Including studying the effects of step voltage and touch voltage that will occur.