Rajamangala University of Technology Phra Nakhon
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การประดิษฐ์เซรามิกบิสมัทโซเดียมซาแมเรียมไททาเนต-แบเรียมไททาเนตด้วยเทคนิคการสังเคราะห์แบบเผาไหม้
Get PDFโครงงานพิเศษ (วท.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2562Ceramic Bismuth Sodium Samarium Titanate - Barium Titanate at the concentration of samarium 0.04 mol% was preparing by ball mill technique. This research has increased the temperature in the combustion process at different temperatures from 940,960 and 970 degrees Celsius for 7 hours. The results showed that firing at different temperatures made the ceramic beads very dense. In addition, the study of the crystal structure by XRD technique to study the structure of the ceramic BSNT-BT found that the structure is the same substances in the ceramic group BaTiO3. The results of the study of dielectric properties and ferroelectric properties It was found that the dielectric and P-E hysteresis loops were related and tend to correlate with increasing density with sintering temperature. The mechanical properties of ceramics were tested by measuring the hardness of ceramics at different temperatures, with temperatures affecting the changes in various properties of ceramics BSNT-BT.Rajamangala University of Technology Phra Nakho
การปรับปรุงคุณสมบัติเฟร์โรอิเล็กทริกของ0.93(Bi0.5-x/0.93Smx/0.93Na0.5) TiO3-0.07BaTiO3 สำหรับเป็นแหล่งกักเก็บพลังงาน
Get PDFโครงงานพิเศษ (วท.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2562In this study, we investigated the effects of Sm2O3 addition in ceramics 0.93(Bi0.5-
x/0 . 9 3Smx/0 . 9 3Na0 . 5 ) TiO3 - 0 . 0 7 BaTiO3 by mixing solid oxide solutions. The crystalline
properties of the X-ray diffraction and ferroelectric properties were studied from the P
- E loop. The physical properties showed that BSNT-BT ceramic density increased and
the percentage of shrinkage decreased due to the increase of the amount of Sm2O3.
Moreover, it was found that the results were consistent with the structural study for
sintered samples at a temperature of 950 °C for 7 hours. It can be determined that the
BSNT-BT ceramics have a perovskite structure, which is like the main structure of
ceramic type BNT. Dielectric properties and dielectric losses at room temperature
showed that when increasing the amount of Sm2O3 in BSNT-BT ceramics, the dielectric
and low dielectric loss were consistent with reduced material resistance. Further, the
ferroelectric test found that BSNT-BT ceramics improved the ferroelectric properties
when increasing the amount of Sm2O3 in the BSNT-BT ceramics.Rajamangala University of Technology Phra Nako
การศึกษาวิธีการบ่มมะม่วงหาวมะนาวโห่เพื่อลดความฝาดในการผลิต น้ำมะม่วงหาวมะนาวโห่พาสเจอร์ไรส์
Get PDFโครงงานพิเศษ (วท.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2562This aims of special project are study about method reduce astringent of ripening suitable products of carunda pasteurized juice, we are study the changes during storage of carunda pasteurized juice and study cosumer acceptance of products of carunda pasteurized juice. From method revealed that the methods of ripening carunda the most suitable method is method 3 ,the method of ripening Cassia Tree in 3 days, we are found physical quality in the value L* ,a* and b* (peel) is equal to 38.03±0.26, 29.44±0.17, 13.43±0.35 the value L*, a*, and b* (the meat) is equal to 35.43±0.10, 36.86±0.08, 19.87±0.07, Chemical found °Brix values were 8.83±0.29 and 2.97±0.02. The pH of the test scores in most aspects. The difference was statistically significant (p<0.05) and then study the dynamics between the preservation of products carunda pasteurized juice and found that L*, a* decreased statistically significantly (p<0.05) and b* values were increased statistically significantly (p<0.05). The bacteriological quality of carunda pasteurized juice found that microorganisms not exceed 1x104 cfu/sample 1 ml, yeast andmold must not exceed 100 CFU/sample 1 ml, S. Cheryl Shea coli must be less than 3 MPN/sample 1 ml and Coliform less than 2.2 MPN/100 ml Which does not exceed the prescribed standards of the Ministry of Health. Can be stored at room temperature 4+2 °c storage for 3 weeks, The study on the adoption products Karanda Pasteurized found that consumers agree 100 percent.Rajamangala University of Technology Phra Nakho
ขนมตูเลย์เสริมผำอบแห้ง
Get PDFโครงงานพิเศษ (คศ.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2562The objectives of this study were to investigate the three basic tuiles recipes and to study the content of four types of wolffia dry in tuiles at 0% , 2% , 4% and6% of total ingredient weight. By planning randomized complete block design(RCBD) and evaluating sensory quality in appearance, color, odor, taste, texture (crispy), and overall preference with the use of testing methods for 9- Point Hedonic Scale. The study the basic formula for tuiles by allowing 40 tasters and the study this tuiles supplementaly with wolffia dry by allowing 80 testers to be undergraduates in food and nutrition, Faculty of Home Economics Tecnology Rajamangkala University of Tecnology Phranakhon. Take average data(Mean), analyze variance (Analysis of Variance, ANOVA) and compare differances mean values (Duncan’s New Multiple Test, DMRT) The results of the 3 basic formulas of tuiles, namely found that the tasting person accepted the formula 1 in appearance, color, taste, texture (crispy), and overall preference. Average 8.02 7.95 8.08 7.93 and 8.13 respectively at the level medium to high level and the tasting person accepted the formula 3 in odor preference average of 7.70 at the level medium. When analyzed Variance and comparison of differences found that appearance, color, odor, taste, texture (crispy), and overall preference there are significant differences at the level of 0.05. The results of the study of the amount of tuiles supplementaly with wolffian dry in 4 formula found that the tasting person accepted the formula supplementaly 2% in color, odor, texture ( crispy) , and overall preference average of 8. 15 7. 79 8. 28 and 8. 05 respectively at the level medium to high level and tasting person accepted the replace 0% in appearance and taste preference average of 8. 18 and 7. 88 at the level medium to high level. When analyzed variance and comparison of statistical differences found that appearance, color, odor, taste, texture ( crispy) , and overall preference there are significant difference at the level of 0.05.Rajamangala University of Technology Phra Nakho
เทคโนโลยีความจริงเสริมการเรียนการสอนสำนวนไทยสำหรับผู้บกพร่องทางการได้ยิน
Get PDFโครงงานพิเศษ (ทล.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2562This research had a purpose to produce an augmented reality as an instructional
media for Thai's subject, in category 'Thais idiom' and also surveys on the satisfaction
of its student that used the media as well. The experimental group of this study was
split into two groups. The first group was the 4th graded student for 20 persons. The
second group was the teachers for 3 persons. Both parties are from Setsatian School
for The Deaf Under the Royal Patronage. After an experiment, all the groups will assess
all the media. The statistical data that will be analyzed were percentile, average, and
standard deviation. The result of this research showed the satisfactory result from the
experts, the teachers, and the hearing-impaired students that they all have satisfaction
on the highest level.Rajamangala University of Technology Phra Nakho
ความสามารถในการดัดขึ้นรูปและกลไกความเสียหายของโลหะแผ่นอลูมิเนียม AA6016
Get PDFวารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 15, ฉบับที่ 2 (ก.ค.-ธ.ค. 2564), หน้า 130-145Aluminium alloys was used in the automotive parts industry increased, for compensate steel parts material, due to its lightweight and good surface. Since, aluminium alloys are there relatively low mechanical properties, although they can be deformed easily, but the major limitation is their low formability. Especially, the less bending radius, which is often bending surface damaged easily. In the present work, five-difference ratio of sheet thickness and bending radius for study to the bendability of cold rolled aluminum alloys AA6016 at low bending radius. The bending test by Air-bending method, according to ISO 7438: 2010. To compare the results every 15 degrees. The mechanical behaviour, surface roughness, microstructure and damage evolution in the fillet region were analysed by experimental research. The experiment clearly showed that the Spring-back angle and bendability tend to decrease as the bending angle and material thickness increase. Due to the high tensile stress on the bending surface, it effected to the surface roughness increases rapidly and led to the damage on the specimen bending surface. The initial cracks occur on the middle of the outer surface curvature and propagation in the shear plane pattern to the middle of the sheet thickness along the grain boundary. This is the consequence of plastic deformation by bending test.Rajamangala University of Technology Phra Nakho
การจำลองทางคณิตศาสตร์เปรียบเทียบกับการปฏิบัติการโรงไฟฟ้าพลังงานแสงอาทิตย์ขนาดเล็กแบบกระจายตัวในระบบจำหน่าย
No full textวารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 15, ฉบับที่ 2 (ก.ค.-ธ.ค. 2564), หน้า 194-206This paper presents a mathematical simulation to compared to operations a small distributed photovoltaic power plant in the distribution system. Practices transmission of electric power by small, distributed solar energy With the PVSyst and IEC 61724 mathematical modeling programs, the main objective was to study the % performance ratio photovoltaic power plants 5.95 MWp connected in the distribution system of the Provincial Electricity Authority, voltage level 22 kV. Therefore, this paper is presented as a mathematical simulation compared to operations a small distributed photovoltaic power plant in a distribution system. The results of the study show that the operation of small distributed solar power plants increases the efficiency to be able to produce the maximum electricity and continuously. The system was able to produce the highest power of 8,954.9 MWh/year and had an average annual efficiency ratio of 77.84%, receiving the highest solar radiation intensity and the highest annual total energy output of approximately 1,837 kWh/m2Rajamangala University of Technology Phra Nakho
การพัฒนาศักยภาพผลิตภัณฑ์เนื้อสัตว์แปรรูปเสริมกากสับปะรด ที่เหลือจากการคั้นน้ำ
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563The potential development the of processed meat products enhancing pineapple pulp left by juicing. Pattawia pineapple pulp used in research. Boil to extract the acid and sugar. The pulp looks like fresh pulp light yellow. The processed meat products used include coarse ground pork sausage, pork ball and Moo Yor.
Pineapple pulp supplementation in coarse ground pork sausages could be supplemented by up to 15 percent. Pork balls can be supplemented up to 20 percent and Moo Yor can be added up to 10 percent.
The addition of pineapple pulp to processed meat products resulted in an increase in crude fiber content in all 3 processed meat products. At the same time, resulting in light processed meat products and has a reduced texture characteristics score which affects acceptance.
Consumer acceptance test in The potential development the of processed meat products enhancing pineapple pulp left by juicing for 100 tester found that most testers are more than 95 percent acceptance in the product of The potential development the of processed meat products enhancing pineapple pulp left by juicing.
For the technology propagation of the potential development the of processed meat products enhancing pineapple pulp left by juicing in faculty of Homes Economocs Technology, the participants were most satisfied with all aspects of the technology propagation.Rajamangala University of Technology Phra Nakho
การผลิตเชื้อเพลิงอัดแท่งจากเปลือกมะพร้าวอ่อน
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563Young coconut shells are a byproduct after processing coconut juice, which can be used to
produce a solid-fuel. This fuel from the coconut shell is an alternative source instead of using firewood or charcoal made of timber in the natural forest. The solid-fuel from young coconut shells was prepared by using a wet glue powder as a binder then was compressed by using a briquette machine. The black coconut briquette was stable after exposure to the sun. The average of the briquette combustion rate was at 11.24 g /min. There is no eruption, smut, smoke, and odor by using the young coconut shell briquette yo start a fire. To sum up, a young coconut shell has a high potential as an alternative biomass material for producing a briquette, especially for commercial. This solution can increase the reduction of haze weather in the sight of solid waste incineration and also global warming.Rajamangala University of Technology Phra Nakho
เส้นทางเดินเท้าที่เหมาะสมสาหรับการท่องเที่ยวในเมืองลพบุรี
Get PDFรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2563An optimal of walking path to travel in Lopburi City was the shortest distance of path anduses
least travel time. The research methodology used the survey of 10 real locations togetherwith
viewing satellite maps and diagrams from Google earth.com for graphing and weighting of edges (distance, time). The result analysis used the basic ideas of graph theory by finding the path that has all the vertex and used the idea of matrix by finding the adjacency matrix. The result of the research shown that an optimal of walking path to travel in Lopburi City that is to be as following Wat Puen Wichayen House Prang Khaek Somdet Phra Narai National Museum Lopburi Wat Phrasi Rattana Mahathat Wat Bandai Hin Wat Inthra Wat Nakorn Kosa Phra Kal Shrine Phra Prang Sam Yot with a total distance of 2,090 meters in 25 minutes.Rajamangala University of Technology Phra Nakho