The purposes of this research were 1) to study the personal student factors of a vocational certificate type of Home Economics Phetchaburi Vocational College 2) to study the importance and the decision to study for a vocational certificate type of Home Economics Phetchaburi Vocational College 3) to study relationship between the personal factors and the importance of the decision to study for a vocational certificate type of Home Economics Phetchaburi Vocational College. The sample used were 148 students who are studying in vocational certificate type of Home Economics Phetchaburi Vocational College. The instrument used in this thesis was questionnaire. The statistics based on the data analysis include percentage frequency values average standard deviation and Chi Square. Analysis of statistical data by a computer program. The results showed that 1) the personal student factors of a vocational certificate type of Home Economics Phetchaburi Vocational College were no effect for the decision to study in general. 2) the learners pay 7 sides attention to the study for a vocational certificate type of Home Economics Phetchaburi Vocational College in general were rated at high level. When considering each side it was found that every side was rated at high level. Shortage average form most to least is career the college environment learner development activities teachers curriculum and media materials and equipment that support teaching. 3) the relationship between respondents’ general information and decision to study for a vocational certificate type of Home Economics Phetchaburi Vocational College found that gender related with media materials and equipment that support teaching age related with college environment and field of study related with image of college is statistically significant at the 0.05 level. The relationship of grade point average (GPA) and revenue of learners per month didn’t relate 7 sides with the decision to study for a vocational certificate type of Home Economics Phetchaburi Vocational College is statistically significant at the 0.05 level.

This research project aimed to test the mechanical properties and the capability in wear resistance of ultra-high molecular weight polyethylene composite as well as determine the optimal formulation of UHMWPE-based composites which had a main component of aluminum oxide. The developed formula was used in the manufacture of run-flat wheels and thus applied to build run-flat wheels with an understanding of the proper molding conditions under the run-flat wheel forming process. Two materials used in the research consisted of super-high molecular weight polyethylene (UHMWPE) as the base material and the additive of aluminum oxide (Al2O3). The parameters employed in the hot compression process to obtain the specimen for the experiment consisted of compressive force temperature time and the ratio between super-high molecular weight polyethylene and aluminum oxide. The test for mechanical properties consisted of an impact test a hardness test according to the ASTM D2240 standard a tensile test according to the ASTM D638 standard type I and a wear test according to the ASTM G77 standard. The results indicated that a hot compression condition under a pressure of 5 MPa a temperature of 210°C for 90 min and using 5% Al2O3 HTM 30 material caused mixed uneven powder particle sizes between 2 to 5 µm. The tensile test results inferred the yield strength of 20.52 MPa ultimate tensile strength at 29.96 MPa breaking strength at 22.83 MPa elongation at break at 265.8% and modulus of elasticity at 784.46 MPa. The highest hardness was 62 shore D the high impact strength was 586.8 J/m and it was displayed for the wear rate of hot compression specimens made of UHMWPE mixed with 5% HTM-30. Moreover it introduced a coefficient of friction the wear rate and the density of 0.12 8.66E-11 mm3/N.m and 1.2446958 g/cm3 respectively.

This 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 bullets 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.

This research aimed to study the optimum factors affecting the quality of gold plating process to enhance OTOP knife products of Ban Mai knife forgers village. This study focused on application of AISI 5160 steel and the 24k gold plating process.In the experiment three samples of plating currents were observed; 10 12 and 14 volts each at 30 60 90 120 150 seconds and 180 seconds respectively. The study found that applying the electric currents in gold plating at 12 volts for 120 seconds gave the best results for the gold color and thickness by giving the thickness of the gold surface at 33.82 micron and the color value between L*=88.72 a*=4.45 and b*=78.58. Moreover the gold dispersion was consistent throughout the workpiece. From applying the electric currents in gold plating at 10 volts it lessened the thickness of the gold plating which made the gold plating look uneven. From applying the electric currents in gold plating at 14 volts it increased the thickness of the gold plating which resulted in a dull or burned finish from over-plating. In comparison the cost of the knife before plating with gold costs only 30 baht per piece while the cost of the knife after plating with gold costs 99 baht per piece. In conclusion the daily sales of a product increase from 50-60 items per day to 60-75 items per day which also resulted in increased revenue and profitability from 1500-1800 baht per day to 5940-7425 baht per day on average.

This study was conducted to isolate and classify fungal dirty panicle disease pathogens from five rice varieties. Observation of rice seeds under stereo microscope showed that the seeds from all five varieties had 100% lesions of dirty panicle disease. When isolating the fungal pathogen with three methods i.e. (i) ground rice seeds shaken in dH2O and then spread on potato dextrose agar (PDA) (ii) rice seeds washed with dH2O twice then placed on PDA and (iii) rice seeds shaken in 5% clorox for 5 min after that washed with dH2O twice and then placed on PDA 57 isolates of fungi were obtained. Morphological characterization classified the fungi into 17 genera i.e. Alternaria Arthrinium Aspergillus Biporalis Botryotinia Botrytis Corynespora Curvularia Cylindrocarpon Fusarium Humicola Monilinia Mucor Penicillium Rhizopus Stachybotrys and Stemphylium. Four genera i.e. Alternaria Bipolaris Curvularia and Fusarium were reported to cause of dirty panicle disease of rice. The effect of glow discharge plasma on inhibition of fungal pathogen showed that exposed glow discharge plasma for 150s could inhibit mycelium growth of Curvularia but did not affect to Bipolaris and Fusarium.