Rajamangala University of Technology Phra Nakhon
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ศึกษาสมบัติทางกายภาพของวัสดุเหลือใช้ทางการเกษตรเพื่องานหัตถอุตสาหกรรม ชุมชนบ้านถ้ำเสือ จังหวัดเพชรบุรี
Get PDFวารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 14, ฉบับที่ 2 (ก.ค.-ธ.ค. 2563), หน้า 31-44This research 1) to study and analyze the relationship between the context of industrial handicrafts,properties of agricultural waste in community areas and 2) to agricultural waste to find physical properties and the industrial handicrafts for Bantumsua community, Phetchaburi province. From primary data it was found the relationship of the community with the context of industrial crafts is a culture of agricultural wisdom from the collection of participatory research data. Found method and test the properties of paper pulp from agricultural waste where banana leaves = A, bamboo leaves = B and pineapple leaves = C.Use the formula for quantifying the triangular grid the Trixie Blend Diagram to uses caustic sodium hydroxide 10-15% of dry weight. There are 7 test items, 1 formula thin and thickness (a) according to the experimental standard, referring to the community product standards, plant fiber paper. For testing as follows: 1) standard average weight from the test of paper size 45x85 cm operation number list of the experimental formula test section 1.1) standard weight the overall average is equal to 220 grams/sqm., 1.2) part 2 tear strength which is strong = 3(10a) at 1,962 mN, the second strength = 1(8a) at 1,907 mN and third = 6(13a) at 1,467 mN. 1.3) Part 3 the overall moisture content of the paper the experiment found the humidity level is within the normal level at ± 10%, which is complete and can be developed into a products or package. 2) Summary of physical properties the color characteristics of the paper according to provide color tones gray-brown and different beautiful suitable for the screen-printing and using large size rubber stamp. Process forming can produce use by semi-automatic heat setting at 140°C at time of 70 seconds per piece is suitable for further expansion to create industrial handicrafts for the community.Rajamangala University of Technology Phra Nakho
การพัฒนาฟิล์มย่อยสลายได้จากแป้งมันแกวเพื่อประยุกต์ใช้เป็นถุงเพาะชำ
Get PDFวารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 14, ฉบับที่ 1 (ม.ค.-มิ.ย. 2563), หน้า 1-14This research aimed to study the production of a biodegradable film from Jicama starch (Pachyrhizus erosus (L.) Urbar) for plant bag application. The film was prepared by dissolving Jicama starch in water to the concentration of 5 wt%. To study the effect of the glycerol content, the glycerol was added at 6 levels; 0, 10, 20, 30, 40, 50 and 60 wt%. The film was casted in a molded and dried at 60 oC for 24 h. After drying, properties of films; thickness, water activity (aw), solubility, tensile strength (TS), elongation (%E), puncture strength and the degradation of the films were evaluated. The thickness of the films was in the range of 0.16-0.28 mm. The aw of films ranged from 0.36-0.49. The water vapor permeability, water solubility, and flexibility of the film increased with the increasing of glycerol content. Tensile and puncture strength of the starch films tended to increased when the glycerol content decrease. After the films were buried under the ground (8-10 cm depth) for 12 weeks, they were degraded by 100%. The Jicama starch film with 40 wt% glycerol showed the best overall properties.Rajamangala University of Technology Phra Nakho
การศึกษาพฤติกรรมการเผาไหม้ของเตาแก๊สแรงดันต่ำแบบเวอร์ติคอลพอร์ตด้วยวิธีพลศาสตร์ของไหลเชิงคำนวณ
Get PDFวารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 14, ฉบับที่ 1 (ม.ค.-มิ.ย. 2563), หน้า 70-81The objective of this research is to study the combustion characteristic of a low-pressure vertical port burner using computational fluid dynamics (CFD). The simulation model was created using Fluent 6.3 in 3D-model of the same size of the burner. The CFD results were verified by measuring the temperature around the burner head and a vessel. Moreover, the results of conventional vertical port burner, having the swirl angle of 90o and the inclination angle of 90o (CB-S90I90) and two swirl port burners (SB), being SB-S90I13 and SB-S30I90, were compared. The temperatures obtained from CFD and experiments were similar, which the error was less than 9%. From the CFD’s results, the temperature and heat flux of the SB-S90I13 burner were higher than those of the CB-S90I90 burner. The maximum temperature and heat flux of SB-S90I13 burner were 1,445 K and 5,291 W/m2, respectively. It was implied that the combustion characteristic and heat transfer to the vessel of SB-S90I13 burner was better than that of CB-S90I90 burner. It was resulted that the thermal efficiency of SB-S90I13 burner was better than that of CB-S90I90 burner, which was the percentage energy saving of 6.93%.Rajamangala University of Technology Phra Nakho
การพัฒนาโปรแกรมจำลองปฏิบัติการระบบสื่อสารโดยใช้ GUI MATLAB
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2561With the objective 1) to develop communication system operating simulation program using GUI MATLAB 2) To find the efficiency of communication system simulation program using GUI MATLAB and 3) To compare the calculation results from the developed program with the calculation results The parameters of the high frequency transmission line which were developed to be programmed Classified by type of transmission lines in the air, depending on the frequency and use, including two-wire transmission cables. Twin-plane transmission cables And coax signal transmission lines The program components are divided into 3 screens, namely the main screen, the main program screen And parameter calculation screen Systematic quality and efficiency checks by 5 experts That has specialized expertise The tools used in the research were the quality inspection evaluation form which is divided into 2 parts which are part 1, program testing and part 2, testing the statistical system used for data analysis, including mean, percentage and standard deviation. The research found that
1. The result of the development of communication system simulation program using GUI MATLAB with the structure of the program design Dividing operations into 3 main parts Namely the calculation of two signal transmission lines. The calculation of the twin plane transmission line program And the calculation of the coax transmission line program n each part of the program calculation, there is a working principle of the program. Each part of the calculation of the program has a working principle of the program. Divided into the terms of the scope of the transmission line Calculate capacity Calculate the conductivity Calculate inductance Calculate resistance And calculate the impedance value In which all calculations can show calculation results Select the calculation of various transmission lines. The program that the research team developed The signal transmission line is divided according to the type of usage and frequency. There are 3 signal transmission lines, which are two-wire transmission lines. Twin-plane transmission cables And coax signal transmission lines
2. The result of finding the efficiency of the communication system simulation program using GUI MATLAB is divided into 2 parts.
Part 1 Result of the language, order, and ability test for all 5 sub-processes Is correct No errors in the process In which each working process is linked as designed Overall, the system development can work without errors. And when evaluating system acceptance It was found that the developed program could be used as a research tool. When considering each aspect found that Design. Design standards Design quality And the structure that is not complicated design is accepted by experts As a percentage between 82% - 85% Working process, sorting work process Understanding of working language is accepted by experts. As a percentage between 82% - 87% And in front of work, how to work in each work Compliance with user needs is accepted by experts. As a percentage between 80% - 95% And part 2, finding the performance of the communication system simulation program using GUI MATLAB developed, found that the developed program has a high level of performance (x ̅ = 4.16, S.D. = 0.35)
3. Comparison between the calculated results from the developed program and the calculated results With matching calculation results Therefore shows that The developed program can be used in place of efficient calculation by hand.Rajamangala University of Technology Phra Nakho
ผลของใยอาหารจากแกนสับปะรดต่อคุณภาพของขนมข้าวตู
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563These research objectives are to study the basic formulas of Khoo-Tu dessert (dried rice balls made from rice and coconut) and to study the volume of pineapple cores instead of coconut in Khoo-Tu. The test of Khoo-Tu dessert basic formulas by 9 - point hedonic scale method of 50 examiner laboratory the results show acceptance rated on a moderate scale (7). After that substituting coconut with pineapple core, the amount of 0, 25, 50, 75, and 100 of the weight coconuts.It was found that at 75% of the substitution level, the tasters evaluated the greatest acceptance (p> 0.05).
The basic formulas had a pH of 6.24, the Pineapple core formulas 5.94 (p> 0.05). Water Activity (aw)of Khoo-Tu, the basic formula was 0.85 and the pineapple core formula was 0.90 (p> 0.05). The color value of the pineapple core Khoo-Tu was L * (brightness value) (37.31) b * (yellowness value) (9.45) rather than the basic formula Khoo-Tu (p> 0.05).
The nutritional value of the pineapple core Khoo-Tu was 316 Kcals, protein 2.71 %, fat 8.86 %, ash 0.52 %, carbohydrates 56.3 %, dietary fiber 3.99 %, insoluble fiber 3.60 %, and 0.39% of water-soluble dietary fiber that was found in the pineapple core Khoo-Tu to provide lower nutritional value than basic formula Khoo-Tu. The microbiological quality of basic formula and pineapple core formula was found that the total variable count, fungi and bacillus serous were less than 10 colonies / 1 g sample, and staphylococcus aurias were not found in both samples.
The shelf life of rice (Room temperature) found that the basic recipe was 12 days and the pineapple core recipe It has a shelf life of 6 days. At chilled temperature (4 degrees Celsius), it was found that the basic formula and pineapple core formula had a shelf life of 25 days with all microorganisms less than 1 x 104 colonies/sample, 1 gram, fungus less than 100 colonies /1 gram sample, and All microorganisms and fungi exceeded the standard on the 28th day.Rajamangala University of Technology Phra Nakor
การพัฒนารูปแบบกิจกรรมรับน้องใหม่อย่างสร้างสรรค์ ของนักศึกษาคณะสถาปัตยกรรม ศาสตร์และการออกแบบ มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563This research aimed to study the factors for the development of creative recruiting
activities. Of students in the Faculty of Architecture and Design Rajamangala University of
Technology Phra Nakhon Intended to 1) To analyze the key elements in creating a creative
new recruiting activity development model Of students in the Faculty of Architecture and
Design Rajamangala University of Technology Phra Nakhon 2) To create and develop a
creative new recruiting activity development model In accordance with the context of the
students of the Faculty of Architecture and Design Rajamangala University of Technology
Phra Nakhon 3) To create a creative recruiting activity model guide Of students in the
Faculty of Architecture and Design Rajamangala University of Technology Phra Nakhon
From 169 students According to the research, 53.3 percent of the students were male and
46.7 percent were female. 1st year students 41.4% 2nd year students 23.7% 3rd year
17.8% 4th year students 17.2% They are studying architecture 29.6%, in product design,
53.3%, in packaging and printing, 17.2%. Students' comments section on the patterns of
freshman recruiting and cheer meetings. Relationship activities The overall mean was at a
high level (x̅ = 3.91). Students' comments section on the patterns of freshman recruiting
and cheer meetings. With SOTUS system Overall, the mean is at a moderate level
(x̅= 3.03). Student Opinion Section on the Impacts of Organizing Fresh Graduation and
Cheering Meetings Relationship activities Overall, the mean was at a high level (x̅= 3.54).
and the comments section of students on the impact of organizing new recruiting activities
and cheer meetings. With SOTUS system Overall, the mean was at a moderate level
(x̅= 3.04).Rajamangala University of Technology Phra Nakor
แนวทางการพัฒนาธุรกิจหมี่โคราชของผู้ประกอบการขนาดย่อมในจังหวัด นครราชสีมา
Get PDFวิทยานิพนธ์ (คศ.ม.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563The purposes of this research were : 1) to study the business operations of Mee Korat small business owners in Nakhon Ratchasima Province, 2) to identify problems of Mee Korat small business owners in Nakhon Ratchasima Province, 3) to compare the business problems’ levels of Mee Korat small business owners in Nakhon Ratchasima Province according to business operation problems, and 4) to propose guidelines for developing Mee Korat business of small business owners in Nakhon Ratchasima Province. The research population was 35 Mee Korat small business owners in Nakhon Ratchasima Province. The research instrument was a questionnaire. The statistical analyses used in this study were frequency, percentage, mean, standard deviation and one way analysis of variance.
The research results can be summarized as follows: 1) For the business operations of Mee Korat, the business owners mainly produced Mee Korat products and sold them together with sauce. They have run the business for 16 years with at least 10 employees using personal selling strategies for the products. According to monthly sales reports, there were less than 10,000 packs of Mee Korat products, and the monthly income became less than 200,000 baht. 2) The small business owners faced up to medium level business problems. When considering each problem from the most to the least, the problems were products, sales, production, personnel, finance and management respectively. 3) The comparison of all the level of business problems of Mee Korat small business owners in Nakhon Ratchasima Province showed that the problems included types of products for selling, length of business management, number of employees, business marketing strategies, amount of monthly production and monthly income of the business problems of Mee Korat small business owners in Nakhon Ratchasima Province had no statistically significant differences at the .05 level. And 4) the guidelines for developing Mee Korat business were as follows: The small business owners should improve vermicelli quality to prolong the shelf life of vermicelli and provide a variety of flavors of vermicelli. The small business owners should modernize the types of vermicelli and build an online distribution channel. They should also find lending sources with low interest rates to improve business so as to compete with competitors. There should be an implementation of job rotation for employees/members to increase production capacity. Moreover, the small business owners should offer more opportunities in administration for new visionary staff and the former administrators should give advice to new administrators to improve the business growth and compete with more competitors.Rajamangala University of Technology Phra Nakho
คุณลักษณะความเป็นมืออาชีพกับคุณภาพการสอบบัญชีของสำนักงานบัญชีคุณภาพในเขตกรุงเทพมหานคร
Get PDFการค้นคว้าอิสระ (บธ.ม.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2561The study of “Professional characteristics and Auditing Quality of the Quality Accounting Offices“ aims to study the professional characteristics affecting the auditors’ quality, to test the influence of intelligent learning, techniques and duty practices, relationships and communication, and organizational management skills, and to test the influence of the personal characteristics of the auditors on the auditing quality. The data is collected from 168 samples and analyzed using descriptive statistics including frequency, percentage, mean and standard deviation and inferential statistics including Pearson Correlation Coefficient Analysis and Multiple Regression Analysis
The study results showed that, overall, the auditors have a high level of professionalism and each level is at a high level. The professional characteristics on intelligent learning, techniques and duty practices, relationships and communication, and organizational management skills have a relationship with the overall auditing quality. Each aspect of auditing quality, including accuracy, accountability, clarity, conciseness, creativity, integrity, and timeliness is related to professional characteristics on intelligent learning, techniques and duty practices, relationships and communication, and organizational management skills. In addition, when considering the auditors' opinion, which comes from a sample group on the auditing quality of the quality accounting offices, it is found that the auditors with different age, education level, and experiences have different opinionsRajamangala University of Technology Phra Nakho
การพัฒนา Application เพื่อกำหนดราคาสินค้าชุมชน
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2560The purpose of this research was to develop an application for setting up price for goods in the community. The application helps the retailer calculate and determine the product price with the minimal risk. In order to assess the satisfaction of the application, the samples used in this study were 30 community retailers and goods producers. The research found that the application was in good quality. The evaluation of satisfaction with the application was averagely 4.45, which was at a very high level. The application can be actually used in authentic circumstances.Rajamangala University of Technology Phra Nakho
การประเมินสมรรถนะการป้องกันฟ้าผ่าระบบสายส่งย่อย 69 กิโลโวลต์ บนเสาไฟฟ้าโมโนโพล
Get PDFวิทยานิพนธ์ (วศ.ม.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2558Most of Metropolitan Electricity Authority (MEA) electric power system is using overhead line. It is 94% in the system including subtransmission, distribution and low voltage system. All of them were installed on concrete pole. At present, many public facilities have been built such as Sky-Train. It causes more constrains for construction with concrete pole due to lack of right of way. MEA needs to using electrical monopole plays an important role. It’s easier than concrete pole for construction and it requires less construction area than concrete pole.
The thesis evaluation of lightning performance in subtransmission line 69 kV study on MEA. Case lightning strike on overhead ground wire (OHGW) at pole top of electrical monopole with suspension insulator, Focusing on three factors is pole top voltage, critical current and back flashover rate (BFOR). ATP-EMTP software is used for simulation. The results show that BFOR is reduced by 79% on electrical monopole structure with suspension insulator compared with existing concrete pole. BFOR is also reduced by 33.17% on concrete pole with external ground wire. The results could be served as a guideline in subtransmission line design and improvement in MEA power system.Rajamangala University of Technology Phra Nakho