The special project study aims to create transformative jewellery for women from Lanna-style glass as well as to examine the satisfaction of the target groups on the jewellery. The different three design of the transformative jewellery were sketched based on the review information. The jewellery can be split into smaller pieces which are a necklace earrings and a brooch. Then a favourite design was considered by five experts. Some recommendations for better design were also provided. After that the jewellery was created according to the selected sketching. The satisfactions on the jewellery were collected from two groups of people; 1) twenty-five jewellery entrepreneurs and 2) twenty-five working women aged 18-60 years (Ministry of Labor 2019). The total data of fifty samples were analysed by using frequency percentage and mean. The results showed as following. Three of the five experts chose the design number three as the model was interesting. The necklace earrings and brooch can be detached to suit an outfit perfectly. The experts preferred the transformation by studs and hooks. Furthermore the colour tones are harmonious and can draw the human perception resulting in a variety application on an outfit. The satisfaction of two groups of people; 1) jewellery entrepreneurs 2) working women aged 18-60 years; were examined. It was found that for the style of the jewellery both groups were satisfied with the creativity of the jewellery design at the highest level the satisfaction means were 4.80 and 4.68 respectively. In terms of materials the entrepreneurs were satisfied with the novelty the strength and durability and the safety of materials at the highest level having the same means of 4.36. The working women were satisfied with the suitability of the materials at the highest level with the mean of 4.52. In terms of utility both groups had the satisfaction of wearing to parties at the highest level with the mean of 4.56 and 4.44 respectively. Regarding the price the entrepreneurs were satisfied with the price of 3999 baht at the highest level with the mean of 4.48. Also the working women were satisfied with the price of 2999 baht at a high level with the mean of 4.20. For the place of distribution both groups had the satisfaction of the jewellery stores at the highest level with the mean of 4.96 and 4.52 respectively.

This research is to test the fatigue endurance of the material by using end bending of specimen. The testing material is S45C steel and forming to the standard size for testing. The specimens with a diameter of 8 mm required a different bending moment. It was found that the large bending moment affects the fatigue of the specimen. The specimen quickly damaged due to the high bending stress and there were a small number of load cycles. If the bending moment acting on the specimen was reduced to the bending stress decreased and the number of load cycles increasing. It was shown that the bending stress and the magnitude of the bending moment affected the fatigue of the material. Also the appearance of damage marks of the specimen will have a flaw around the fracture surface. Then the flaw will be enlarged until the specimen will be damaged by fracture.

The fatigue testing machine that uses the force of torsion is invented to be a compact machine that uses the torsion as the force in the test. From the tests it achieved the highest of 200 newton meters using pneumatics to test the metal materials i.e. the steel S45C molded in accordance with the JIS Z 2274 standard. To find out the capacity of the fatigue testing machine that uses the force of torsion with 8 mm 10 mm and 12 mm diameter test pieces the machine was tested with different levels of the force of torsion and the percentage of the deviation of the tests did not exceed the limit of + 10 percent. This research could reduce the cost of the procurement of the fatigue testing machine that uses the force of torsion and could be used in the instruction in the department of mechanical engineering faculty of engineering Rajamangala University of Technology Phra Nakhon in the future.

Molds manufacturing to produce chloroprene rubber product with carbon steel over time the mold surface will wear. From the original. The practice in the industry often uses surface coatings (Hard chrome method) or change materials to create molds. Therefore this research is to study the effect of corrosion or wear. To see the size of surface mold changed in the experiment. Based on a tolerance of 0.1 millimeters at the molding point and after molding in the actual work conditions of a 2-3 weeks sample and mold size measurement. At less than 10 times the permissible coordinate value is 0.01 millimeters. The experiment found that. The wear of carbon steel molds was formed with chloroprene rubber. It has a very small value when referenced to the tolerance coordinates which is not significantly reduced when the rubber specimen size is determined. The allowance range is 10 μm to 100 μm. Therefore the design of chloroprene rubber to make molds with carbon steel. It can help reduce production costs. Without replacing with corrosion-resistant materials or adding coatings.

The purposes of this research were to assess the combined phytotoxicity of glyphosate and carbendazim which were normally used as herbicide and fungicide contaminated in soil as 100 – 1000 mg/kg on seedling growth of ridge gourd. Both of glyphosate and carbendazim were toxic to shoot and root growth of ridge gourd seedlings. The 50% effective concentration (EC50) on shoot length root length root fresh weight and shoot dried weight of ridge gourd seedlings for glyphosate were 669.4 413.0 574.5 and 241.4 mg/kg respectively whereas for carbendazim were >1000 357.8 >1000 and 71.4 mg/kg respectively. Co-contamination between glyphosate and carbendazim seemed to be antagonistic effect. Both of glyphosate and carbendazim at all concentration were not toxic to chlorophyll content in cotyledon of ridge gourd seedlings.