The trend of energy savings has been widely interested and phase shift transformers (HMT) have been extensively used. This paper presents the investigation of the effect of harmonic currents on losses of the HMT. In this paper a 15-degree HMT with quad secondary winding is applied to find the relationship between harmonic currents and losses of the HMT. This relation can be met by testing the active power of primary and secondary sides while the HMT supplies for two and four non-linear loads at 25% 50% 75% and 100% rated currents respectively. The results reveal that harmonic currents affect winding eddy current losses significantly and the losses for loading the two secondaries 1 and 2 are the same as loading the two secondaries 1 and 3 while both %THDi are different. However for loading the secondaries 1 and 2 the %THDi is more than 15% so it is not met IEEE 519 Std. while the HMT is supplied with four loads the %THDi has met IEEE 519 Std. and the losses are less than 57% compared to one load. As a result of these if the HMT is applied to an adjustable speed drive system it is not only reduced the harmonics but also saved the energies.

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.

The purpose of this study is to produce the soil improvement materials from food waste and water hyacinth by using a dehydration process. The experiments were divided into two parts : 1) the study of the optimum temperature and time for converting food waste and water hyacinths to soil improvement materials by determining the temperatures of 100 °C 150 °C and 200°C in the periods of 1 hour 2 hours and 3 hours respectively 2) the study of nutrient content in the materials before and after mixing into the soil for 5 days. The soil used in the experiment was sampled from Sai Ma Subdistrict Nonthaburi Province. The parameters used to evaluate the ability to improve the soil quality were soil moisture pH electro conductivity total nitrogen total phosphorus total potassium and organic matter. The results showed that the optimum temperature for drying the food waste was 150°C for 2 hours and the optimum temperature for drying the water hyacinth was 200°C for 3 hours. When the materials were mixed into soil it found that the soil drainage was improved. Mixing the materials into soil could increase the pH value from 5.2 to 5.4 and increase the electrical conductivity from 0.72 mS/cm to 14.78 mS/cm. Besides the plant nutrients including Nitrogen phosphorus and potassium also increased after adding soil improvement materials.

This research aimed to study the lifestyle behavior of students of Rajamangala University of Technology Phra Nakhon according to the Sufficiency Economy Philosophy. To study the factors influencing the lifestyle behavior of students of Rajamangala University of Technology Phra Nakhon according to the Sufficiency Economy Philosophy. Data collection was conducted between October 2020 and September 2021. It was a survey research using questionnaires. It consists of 4 parts: 1) general information of students which are demographic characteristics 2) knowledge and understanding of the Sufficiency Economy Philosophy 3) lifestyle behavior according to the Sufficiency Economy Philosophy and 4) the students opinions on the adoption of the Sufficiency Economy Philosophy. Sufficiency Economy Philosophy is applied in life. The sample group in the research was students of the University of Technology. The data were analyzed using descriptive statistics for demographic characteristics. The results showed that Demographic data of students of Rajamangala University of Technology Phra Nakhon found that most of them were female aged 20 years studying at the Faculty of Business Administration in the 3rd year. Most of their parents were employed. Family income per month is 20001 – 30000 baht there are expenses per month. (Students only) is 3001 – 6000 baht per month and most students live at home during their studies. in the field of knowledge Understanding of Sufficiency Economy Philosophy Student at Rajamangala University of Technology Phra Nakhon most have knowledge Understanding of Sufficiency Economy Philosophy knowledge level is moderate and when classified according to demographic data show that Students of Rajamangala University of Technology Phra Nakhon with different demographic data knowledge and understanding of sufficiency economy philosophy Life behaviors according to the Sufficiency Economy Philosophy of students of Rajamangala University of Technology Phra Nakhon overall and in each aspect at a high level They can be sorted in descending order of average as follows: Moral conditions reasonableness good immunity moderation and knowledge conditions respectively.

The objective of this research is to study and analyze social support including search for social support models for the. It is a qualitative research that collects data from in-depth individual interviews with 15 elderly and group discussions with elderly representatives and other 12 involved persons. The data collection also includes field observations and notes. We use content-based data analysis interpretation and describing from the phenomena that occurred. The results reveal that: Social support for the elderly’s well-being based on (1) self-level or self-reliance that was an attempt to help themselves as much as possible. This to make oneself feel valued to have self-empowerment and to develop oneself. 2) Family level is the closeness with the elderly who plays an important role in problems solving of physical mental and social suffering as well as to promote happiness of the elderly in all dimensions. (3) Community and local level is the cooperation of groups of people involved in implementation of the care and support the happiness creation that is consistent with family and community problems. There are 3 characteristics of social support models for the elderly’s well-being: (1) Family characteristic which is the closeness of all family members. It takes love gratitude coordination or asking for help as well as the support from both inside and outside the family in every way. (2) The nature of the community is a cooperation and coordination the benefits of both the family and stakeholders in the community in order to strengthen the social support for family quality. It focuses on social participation and well-being development. (3) Characteristic of social networks is an integrated work of 3 large groups that consists of health social service and local community. These attend to care and social support at the family level area level and provincial level emphasizing the policy integration to practice.