The purposes of this research were : 1) to study of factors personal the Demonstration School of Ramkhamhaeng University 2) to study food buying through online applications 3) to study factors of marketing mix towards buying food through online applications 4) To study the relationship between personal factors to buy food through online applications of the Demonstration School of Ramkhamhaeng University and 5) to comparison of opinion toward marketing mix towards buying food through online applications by personal factors. The samples students are studying in high school of the Demonstration School of Ramkhamhaeng University and never buy food through the applications online of 226. The instruments used in research questionnaires and interviews. The statistics used for data analysis were frequency percentage mean standard deviation Chi-square values and One Way ANOVA. The results showed that: 1) Most students were male 18 years of age by studying high school grade 6 and receive money from their parents for about 201-300 baht per day. 2) Most students purchased food Skootar by a full set this was why they had ordered food restaurants and a variety of food items in order was to feeding each paid 200 baht the students were ordering food when a new food product the purchase of food for every taste while students can be taken food delivered within 31-60 minutes and the most important in the fresh new foods. 3) Analysis of the data on the opinion toward was marketing mix towards buying food through online applications of the Demonstration School of Ramkhamhaeng University found that overall; students have commented on the high level the first two items in order from most to least found the side with the highest mean score was the distribution the second was the price and the minimum personnel. 4) Relationships between personal factors as gender age education and the money received from parents to buy food through online applications of the Demonstration School of Ramkhamhaeng University found that was relationship the statistical significance level. 05. 5) Comparison of opinion toward marketing mix towards were buying food through an online application by personal factors were found Gender age education The money received from parents of different. Levels opinion toward marketing mix used to purchase food through an online application not different the statistical significance level. 05.

The purposes of this study aim 1) to evaluate the academic achievement and 2) to study learners satisfaction towards teaching multimedia in the Course Ngor30275 Commercial Flower Arrangement Unit 6 Introduction to Flower for high-school students of Chaichimplee Wittayakom School Bangkok. Sample in this study is 30 students who attended Sports and Home Economics Program and chose Home Economics Course in to 2nd semester of the academic year 2019. According to studies 1) the result of the teaching multimedia proficiency assessment on the content basis by 3 experts was at the highest level by all accounts and the mean was equivalent to (X̅ =4.73S.D. = .31). And the result on the multimedia basis was also at the highest level and the mean was equivalent to (X̅ = 4.63 S.D. = .29) . 2 ) the assessment in the performance of a representative sample of students in the 8 different patterns using scoring rubrics whose standards were at every high level. 3) the assessment on the student’s satisfaction with the teaching multimedia for 8 patterns were as follow Pattern #1 - Spherical Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.61 S.D. = .06) . Pattern #2 - Equilateral Triangle Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.72 S.D. = .05). Pattern #3 - Scalene Triangle Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.61 S.D. = .03). Pattern #4 - Tall Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.68 S.D. = .06). Pattern #5 - Short Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.64 S.D. = .06). Pattern #6 - Long-Bouquet Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.66S.D. = .05). Pattern #7 - Circular-Bouquet Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.69 S.D. = .05). Pattern #8 - Flower Arrangement Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.72 S.D. = .08).

จากการสร้างและการออกแบบกลไกในการจัดเก็บหลักฐานด้านการประกันคุณภาพมหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร ได้ข้อสรุป 1. ผลการวิเคราะห์ความพึงพอใจส่วนการออกแบบรูปทรง ของระบบกลไกลในการจัดเก็บหลักฐานด้านการประกันคุณภาพมหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร มีความเหมาะสมของขนาดตัวอักษรกับหน้าจอโปรแกรม มีค่าเฉลี่ย 3.67 ระดับคะแนนพึงพอในมาก สีของหน้าจอระบบมีความเหมาะสม มีค่าเฉลี่ย 3.67 ระดับคะแนนพึงพอใจมาก มีความถูกต้องของข้อความและการสะกดคำ มีค่าเฉลี่ย 4.30 คะแนนพึงพอใจมาก และรูปแบบของการใช้งานมีความเหมาะสม มี ค่าเฉลี่ย 4.00 ระดับคะแนน พึงพอใจมาก โดยผลสรุปรวมของการวิเคราะห์ด้านตัวอักษร มีระดับคะแนนพึงพอใจมาก โดยผลสรุปรวมของการวิเคราะห์ด้านตัวอักษร มีระดับคะแนนพึงพอใจมาก และมี ค่าเฉลี่ยอยู่ที่ 3.91ผลการวิเคราะห์ความพึงพอใจส่วนการใช้งานระบบ ของระบบกลไกในการจัดเก็บหลักฐานด้านการประกันคุณภาพมหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร ด้านเมนูของระบบมีครบตามควาต้องการของการใช้งาน มีค่าเฉลี่ย 3.67 ระดับคะแนนพึงพอใจมาก มีความง่ายต่อการใช้งานระบบ มีค่าเฉลี่ย 3.67 ระดับ คะแนนพึงพอใจมาก โดยผลสรุปรวมของการวิเคราะห์ด้านความพึงพอใจส่วนการใช้งานระบบมี ระดับคะแนนพึงพอใจมาก และมี ค่าเฉลี่ยอยู่ที่ 3.78 ผลการวิเคราะห์ความพึงพอใจส่วนของเนื้อหาคำอธิบายหลักฐาน ของระบบกลไกในการจัดเก็บเหลักฐานด้านการประกันคุณภาพมหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร ด้านขนาดของตัวอักษรแสดงคำอธิบายมีความเหมาะสม มีค่าเฉลี่ย 4.00 ระดับคะแนนพึงพอใจมาก มีการสื่อความหมายที่ชัดเจน มีค่าเฉลี่ย 3.67 ระดับคะแนนพึงพอใจมาก มีความง่ายในการเลือกตัวอย่างเอกสารที่ต้องการดู มีค่าเฉลี่ย 3.67 ระดับ คะแนนพึงพอใจมาก โดยผลสรุปรวมของการวิเคราะห์ความพึงพอใยส่วนของเนื้อหาคำอธิบายหลักฐาน มีระดับคะแนนพึงพอใจมาก และมี ค่าเฉลี่ยอยู่ที่ 3.78

The ORC power plant is a promising technology to generate electricity from low-temperature heat sources. However implementation of the ORC for low capacity electricity generation is unattractive at the commercial level. Scroll compressors are massively produced to be used in refrigeration and air-conditioning applications. Using a scroll compressor in reverse as an expander can reduce the investment cost of low-capacity ORC power plants. In this study 2 scroll compressors that are available in the automotive air-conditioning market of Thailand were modified and used as the expander of a 1 kW ORC power plant. The performances of these 2 scrolls were compared and the plant performance was investigated. A heat source temperature from 100°C to 150°C was supplied to the plant. It was found that the gross power is higher by 18-35% for the larger expander (110 cc/rev) than for the smaller expander (85.7 cc/rev). The larger one provides the isentropic efficiency of 37-76% and the gross power of 806-1926 W. In addition the effects of check valve installation were examined and compared with those of the tests without check valve installation. It was revealed that the isentropic efficiency increases by 18% while the gross power decreases by 4-22% when the check valve was installed.

The purposes of this research were to 1. Study the effects of ballroom and Latin American dance training on physical fitness 2. Compare the effects of ballroom dancing and Latin American dance training on physical fitness. The samples were 30 undergraduate students of Rajamangala University of Technology Phra Nakhon 15 male students and 15 female students. They were equally divided into 3 groups of 10 students. Each group consisted of 5 male and 5 female students. Group 1 was the control group; group 2 performed ballroom dancing and group 3 performed Latin group dance. The experiment took 8 weeks 3 days a week one hour each time. The physical fitness tests were tested before week 4 and week 8 and the obtained data were statistically analyzed in terms of means standard deviation one-way analysis of variance analysis of one-way covariance with repeated measurements. The research results were as follows: 1. After the 8 weeks of the experiment it was found that the dance practice of the ballroom dancing group and Latin American dance practice group made the average of 1 minute lifting 1 minute ground pushing and 3 minutes step-up. It was significantly better than the control group at the .05 level. 2. As for the ballroom dancing practice within the ballroom dancing group it was found that after the 8 weeks of the experiment the average of 1 minute floor push and 3 minutes step up and down. It was significantly better than before the experiment and 4 weeks after the experiment at the .05 level 3. The results of Latin American dance training showed that after 8 weeks of experiment the mean of 1 minute lifting and 3 minutes of step-up and down was significantly better than before the experiment and after 4 weeks of experiment at the .05 level.