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 objectives of the research on the different egg age affecting the sponge cake were to study the appropriate different egg age to bake the sponge cake and examine the physical and chemical qualities of the sponge cake. The density of the different age cake was measures using the randomized complete block design (RCBD) method at 95% reliability. The quality of senses sight color smell taste and texture and the overall preference were evaluated. The difference of mean was compared with by Duncan New Multiple Rang Test (DMRT) using a computer program to find the appropriate different egg age to bake the sponge cake. 30 testers applied the 5- point hedonic scale to test the product. Research results showed that the testers preferred the egg age at 9 days the most. Ln terms of taste texture and overall preference the mean was 3.70 3.67 and 4.00 respectively. The physical quality test results indicated that the texture of the one-day egg age had the best adhesion and flexibility 0.54 and 0.94 respectively. The egg age at 12 days had the highest lightness (L*) yellowness (b*) and redness (a*) 50.61 4.71 and 23.99 respectively with the statistical significance (p).≤ 0.05

In this article the construction of a high-frequency high-voltage commercial flyback transformer to supply an input voltage for a tesla transformer is proposed. The purpose of a demonstration is a breakdown through the air gap of electrode. To confirm the proposed method the design of control of a flyback converter by using a commercial flyback transformer is rated with a 10 to 15 kV output voltage to supply a tesla transformer at a rated 30 kV and 120 kHz. The experimental results of an output breakdown design of the electrode and the setting for a 1 cm space are constructed. The electrodes consisted of the following: sphere–sphere electrode plane–plane electrode sphere–plane electrode and rod–plane electrode. It was found that there was a breakdown at the output electrode in all cases. Accordingly there was a breakdown with a 2 cm sphere diameter with reference to the IEC 60052-2002 standard; after that it was compared with the standard table and the atmospheric and temperature at the laboratory were adjusted resulting to a high voltage equal to 31.5 kV.

The objective of this research was to study the effect of substitution of wheat flour with Cavendish banana flour on specific volume density antioxidant activity and the sensory acceptance of bread using Cavendish banana flour instead of wheat flour as 0% (control) 10% 20% and 30% of the total flour weight. It was found that an increasing amount of Cavendish banana flour caused the darker of the bread appearance and the specific volume of the bread decreased from 4.22 to 2.69 cm3/g while the bread density increased from 0.24 to 0.37 g/cm3. The total phenolic content and antioxidant activity of the bread made of Cavendish banana flour instead of wheat flour were significantly greater than the control bread (p<0.05). Also the sensory acceptance scores by panelists in terms of appearance color aroma taste texture and overall acceptance of bread using 10-30% of Cavendish banana flour content were not significantly different compared to the control bread (p>0.05) . Therefore the bread using 30% Cavendish banana flour gave the highest amount of total phenolic compounds and antioxidant activity with well accepted by consumers.

The purposes of the research were to study 1) entrepreneurial intention of students of Rajamangala University of Technology Phra Nakorn; 2) entrepreneurial characteristics of students of Rajamangala University of Technology Phra Nakorn and 3) predicting power of the students’ entrepreneurial characteristics on their entrepreneurial intention. The population were 375 third- and fourth-year students in every faculty enrolling in the academic year 2020. The research tool was questionnaires. The statistical data analysis was performed by frequency percentage mean and standard deviation. T-test One-way ANOVA Pearson Correlation Coefficient and Multiple Regression Analysis were used to examine hypothesis. The finding of the study: 1) Most of the students taking the questionnaires are female (62.40%) aged 21 years (43.70%) half of them are in the third-year (54.90%) and in the faculty of Business Administration (33.10%). Most of students’ fathers (38.70%) and mothers (45.10%) are business owners. 2) According to the students’ entrepreneurial intention it was at a moderate level (x̄= 3.95 S.D = 0.617). The highest mean score is a great willing for entrepreneurial intention after graduation (x̄ = 4.13 S.D = 0.901).The lowest mean score is no willing for entrepreneurial intention after graduation (x̄ = 3.43 S.D = 1.001). Reasons for entrepreneurial intention are to have their own businesses /or to be independent (81.65%). As for types of businesses they intend to become entrepreneurs of food/ restaurant/ cafeteria/ bakery shop (72.10%). 3) Due to the students’ entrepreneurial characteristics it was at a moderate level (x̄= 4.13 S.D =0.482). The highest mean score is Need for Achievement (x̄ = 4.22 S.D = 0.597). The lowest mean score is Risk Taking (x̄ = 4.02 S.D = 0.597). 4) There were significant differences in entrepreneurial characteristics of students’ sex age learning program fathers’ occupations mothers’ occupations and families’ income at 0.05 while there was no significant differences in entrepreneurial characteristics of students’ college years. 5) Predicting power of the students’ entrepreneurial characteristics on their entrepreneurial intention was .660. Three types of the students’ entrepreneurial characteristic factors on entrepreneurial intention were Autonomy Innovativeness and Risk taking.