Rajamangala University of Technology Phra Nakhon
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การแปลงหน้าที่ทางคุณภาพเพื่อพัฒนาผลิตภัณฑ์ผลิตไฟฟ้าจากลมระบายความร้อนของเครื่องปรับอากาศ
Get PDFการค้นคว้าอิสระ (วศ.ม.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564This research had the objective to design and develop power production from daily life leftovers for their highest benefit of utilization by using the principle of quality function development and power generator that changed mechanical energy into electric energy. In developing electric generator product from air conditioner condensing unit, the researcher found that there were 4 important factors including speed, installation distance, size and cross-sectional area of the fan and the test was conducted between 8.00-17.00 hours. The researcher collected the data and analyzed the test result and found that the best result in the test was to install the product at the distance of 10 cm by using an 18" fan in order to acquire the best voltage and the data were collected so that they could be implemented in developing such product in the future.Rajamangala University of Technology Phra Nakho
เกมปรากฎการณ์ของโลก
Get PDFโครงงานพิเศษ (ทล.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564This special project is 1) to develop World Phenomena Game for Grade 3 students, 2) to measure knowledge after using World Phenomena Game, and 3 ) to study user satisfaction after playing World Phenomena Game. In this study, an offline ADVENTURE RPG personal computer game was created and validated by 3 professionals with medium level. Then, the game was put to test with a sample group of 10 Satrivoranart Bangkhen School’s Grade 3 students. Quiz and questionnaires were distributed to collect student’s knowledge and satisfaction. During data analysis, a attest was performed with t-Test = 1.83, p=0.05. indicated that student knowledge after playing game was statistical higher than their knowledge before playing game Furthermore, overall user satisfaction was at high level (̅=4.30 : SD=0.90).Rajamangala University of Technology Phra Nakho
ปัจจัยที่ส่งผลต่อความตั้งใจบริโภคอาหารประจำถิ่นเกาะสมุย
Get PDFวิทยานิพนธ์ (คศ.ม.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564The purposes of this research were 1 ) to study the consumption behavior of local food in Koh Samui. 2 ) To study the levels of factors affecting the intention of
local food consumption. 3) To compare personal factors to the intention of local food
consumption and 4 ) To find out the correlation between local food consumption
factors and the consumption intention. This study was conducted by mixed methods
research.The sample consisted of a total of 400 Thai consumers who used to eat local
food in Koh Samui and were selected by accidental sampling method.
The results showed that 1) the consumption behavior of local food was mostly
eaten alone. The top 3 local savory dishes in Koh Samui that the consumer used to
eat were as follows: Moo Ko, Yum Sarai Kor and Wai Kua. The sweet dishes were
Kalamae, Khanom Ko and Tho Won. The types of fruit were Lukfai Ka, Luk Tho and
Luk Kee Kwang. Popularly dined in Koh Samui at famous restaurants. Eat local food
because of its unique taste. Family or relatives were influential in choosing the type of
food. Local food was usually eaten at lunch and purchasing ingredients from the local
community to prepare local dishes. 2) Factors affecting the Intention in term of food
identity, food quality, attitude, and convenience of finding local food were found to
affect the intention to consume local food at the highest level. 3) Personal factors in
terms of age, average monthly income, whether they were Koh Samui residents or not,
and whether they had different accommodation in Koh Samui, were found to have a
difference in their intention to consume local food at the statistically significant level of .05 and 4) factors of food unique, food quality, attitude, and convenience of finding local food to eat, were found to have correlation with the intention to consume local food in all variables by statistically significant at the .05 level.Rajamangala University of Technology Phra Nakho
การพัฒนาสื่อมัลติมีเดีย เรื่องการแกะสลักพื้นฐาน: ชุดผลไม้พร้อมรับประทานวิชาการงานอาชีพ
Get PDFวิทยานิพนธ์ (คศ.ม.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564The purposes of this research were 1) to find the effectiveness of multimedia for learning on Basic carving in the lesson on Ready-to-eat fruit, Home Economics 2) to find the Rater Agreement Index (RAI) towards the Basic carving work of students studying with multimedia on Basic carving in the lesson on Ready to eat fruit, Home Economics. 3) to study the students' satisfaction towards multimedia on Basic carving in the lesson on Ready-to-eat fruit, Home Economics. The research is experimental research. The sample consisted of 19 students, who studying in Mathayomsuksa 3 of Nong Ya Sai Wittaya School, Suphan Buri Province by using cluster random sampling method. The tools used in the research were multimedia, media quality assessment form, performance assessment form and satisfaction assessment form. The statistics used in the data analysis were the Content and Objective Conformity Index (IOC), the Rater Agreement Index (RAI), percentage, mean, and standard deviation.
The results showed that 1) multimedia efficiency on Basic carving in the lesson on Ready-to-eat Fruit, Home Economics are equal to 80.00/84.21. 2) Assessing the consistency of the assessor's score, the overall Rater Agreement Index (RAI) was 0.89. 3) Student satisfaction with multimedia on Basic Sculpting in the lesson on Ready-to-eat Fruit, Home Economics. Overall, the students' satisfaction was at the highest level (X= 4.77)Rajamangala University of Technology Phra Nakho
การศึกษาพารามิเตอร์ในการขึ้นรูปแผ่นเกราะเซรามิกส์รูปร่างหกเหลี่ยมกันกระสุน
Get PDFวิทยานิพนธ์ (วศ.ม.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564This research had two objectives that were to study parameters for forming bulletproof ceramic armor plates and to create a model of a bulletproof ceramic armor plate for small armored regular trucks. The parameters used to form a ceramic armor plate contain the thickness of the armor plate and the compressive strength, which affects the density distribution of the green compact. A ballistic ceramic armor plate with a hexagonal shaped material was created as a concave bulletproof plate. Extrusion results displayed that the hexagonal material was formed at a very high density on the side surface of the armor plate but with uneven capacity distributed across the overall plate, due to the friction occurring on the wall of the mold. The finite element method, particularly at the Ansys/Explicit Dynamic tools were applied to analyse the damage of bulletproof plates. The model of a concave-shaped bulletproof plate was set for the SKD11material, influencing the changes in the direction of the bullet firing when the bullet hit the bulletproof plate at a velocity of 880 m/s in accordance with the NIJ 4 standard. The bullet was made of tungsten carbide and the ceramic armor plate was built with a size of 300×300 mm and thicknesses of 14, 16, 18, and 20 mm. The bullet was fired into the center part and onto the curved surface of the ceramic plate. The result shows that the armor plate could not resistant to penetration. In this situation, the direction of the bullet's movement against the armor plate especially at a curved surface as a slope could result the deflection of the bullet direction as well as reduction of penetration capability.Rajamangala University of Technology Phra Nakho
ชุดสาธิตการสอบเทียบโหลดเซลแบบสองฟังก์ชั่น
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563The objectives of this research are to design the load cell tolerance testing machine and demonstrate the tolerance of load cell with a tolerance test that has a beam length of 90 cm. It can create the compressed force at the load cell more than 1 kN The experiment cam be divided into 2 stages; 1.) verification of load range and 2.) linearity test. Both stages are tested at a temperature at 25°C using 10 to 30 kg of mass in the lowest compressed force condition of 0.091 kN and the maximum compressed force condition of 1.12kN As a result, the linearity performance of the tolerance of the load cell test kit between calculated force and displayed value force are different 0.354 percentage only while the standard deviation of displayed value force and voltage signal output are 0.0013 and 0.0022 respectively. It reveals that the experimental result is reliable because of less than 1. In addition, the tolerance of the load cell tolerance testing machine is 0.00300 (0.3 percent) which was calculated from the comparison of the tolerance specification of two main equipment that specified by manufacturer.Rajamangala University of Technology Phra Nakho
การวิเคราะห์ความสัมพันธ์ระหว่างเงินปันผล กับอัตราส่วนความสามารถในการก่อหนี้ และอัตราส่วนความสามารถในการทำกำไร ของบริษัทจดทะเบียนในตลาดหลักทรัพย์ กลุ่มประกันภัยและประกันชีวิต
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563The analysis of the relationship among dividends, leverage ratios and profitability ratios of listed companies in the Stock Exchange of Thailand: non-life and life insurance sectors aims to study and analyze the financial presentation via financial statement of non-life and life insurance companies. To do so, the researcher, in particular, focused on the information of dividend pay – out ratios, leverage ratios and profitability ratios on sixteen (16) firms during the years 2013 – 2017 by employing correlation analysis.
The results of the study found that the financial ratios with the same directions to dividend pay – out ratio but there were statistical insignificant included operating profitability ratio, net profitability ratio, return on assets ratio, as well as, return on equity ratio. On the other hand, the financial ratio with contrary direction to dividend pay – out ratio but there was no statistical significant consisted of debt to equity ratio. However, debt to total asset ratio was the one which was not only in the opposite direction to dividend pay – out ratio but also was statistical significant.Rajamangala University of Technology Phra Nakho
กระเป๋าลวดลายกราฟิกจากแรงบันดาลใจงานแกะสลักไทย
Get PDFโครงงานพิเศษ (คศ.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564The process of graphic design process inspired by Thai carvings. It was the use of vegetables and fruits carving patterns to be modified to design the lines of the carved patterns to be in graphic patterns. The layout used repetitions and pastel tones in a group of monochromatic colors are combined to create a graphic pattern on one bag. And, choosing to use a bag in the shape of a carry bag because nowadays, people are interested in bags that can be used and can pack a lot of things. The aims of this study were to design a bag graphic from carved patterns and, to study the satisfaction of the target group towards the graphic pattern bag inspired by Thai carvings. The researcher studied the information related to Thai carving patterns, design sketches of ideas, graphic patterns from Thai carvings for experts to consider, improve and edit. And, surveyed for the satisfaction of the target group of 100 people. The collected data were analyzed using frequency, percentage, and mean. The results of the study were as follows:
The satisfaction of the target group towards the graphic pattern bag inspired by Thai carvings. It were found that the majority of the target group was satisfied with the graphic patterns from Thai carvings on bags overall, with an average of 4 . 6 4 at the highest level. In terms of reasons for buying bags overall, the average was 4 . 5 5 , the highest level. In terms of overall bag usage, the average was 4 . 4 8 , the highest level. And, in terms of applying graphics patterns to new products, the overall average was 4.43, the highest level.Rajamangala University of Technology Phra Nakho
การยืดอายุการเก็บรักษากล้วยหอมด้วยฟิล์มไคโตซาน
No full textโครงงานพิเศษ (วท.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563This research was study the optimum condition for chitosan film forming from preparing the chitosan solution 2% (w/w) that added with acetic acid 1% (w/w). The solution viscosity was adjusted by glycerol at 15 30 and 45 % (w/w) and Tween 10% (w/w). From the experimental results, in case of the chitosan solution that adding with glycerol 45 % (w/w), Tween 10% (w/w) and drying which final moisture content at 23 % (d.b.) affected the highest viscosity of the chitosan film that compared with other condition. The ultimate tensile strength of chitosan film was 4.14 MPa. For banana storage testing, the banana was wrapped with chitosan film for 10 days at room temperature, the first five days, the color of banana peel was yellow normally after that the peel was slightly increased with dark color. The total soluble solid of the banana was in the range of 19-28 Brix.Rajamangala University of Technology Phra Nakho
การลดฟอสเฟตในน้ำทิ้งจากกระบวนการซักผ้าโดยใช้เปลือกไข่ไก่และเปลือกหอยแมลงภู่
Get PDFโครงงานพิเศษ (วท.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2562This research studied the factors that affect the efficiency of phosphate reduction in the wastewater of the washing process with CaCO3 and CaO produced from eggshell and mussel shell. The study found that the optimum condition for adsorption when using CaCO3 from eggshell is to adjust the pH to be equal to 10, take 15 minutes to absorb, and add 1 gram of sorbent, which can reduce the phosphate content by 25 percent and when changing the adsorbent to CaO, the optimum condition for phosphate removal is to adjust the pH to 7, take 15 minutes to absorb, and add 1 gram of adsorbent, which can reduce the phosphate content by 24 percent. The optimum conditions for adsorption when using CaCO3 from mussel shell were to adjust the pH to 10, take 45 minutes to absorb, and add 1 gram of sorbent, which can reduce the phosphate content by 25 percent and when changing adsorbents to CaO, the optimum condition for phosphate removal is to adjust the pH to 10, take 15 minutes to absorb, and add 3 grams of adsorbents, which can reduce the phosphate content by 24 percent. In addition, when studying the adsorption of impurities in the wastewater, such as conductivity, turbidity, COD, and BOD, it is found that the optimum reduction conditions can reduce the impurities of the parameters that mentioned above were 19.32, 2.60, 54.77 and 16.67 percent respectively. CaCO3 and CaO, produced from eggshell and mussel shell can be used to absorb impurities in wastewater before releasing into natural water sources.Rajamangala University of Technology Phra Nakho