This research study investigated the structure and electrical effect of the La3+ and Sm3+ co-modified BaTiO3 ceramics with formula Ba1-(x-y)(LaxSmyTi)O3. The concentration of of x was fixed at 0.010 while that of y varied from 0.010 to 0.040. The ceramics are prepared by a solid-state mixed-oxide technique. The phase formation behavior is studied using x-ray diffraction (XRD) The dielectric properties with temperature are broad as wide temperature rang. Results showed that co-modified BaTiO3 ceramic ratio of 0.010 to 0.020 still tetragonal structure where the A-site is disturbed by a group of rare-earth doped. In addition we also found that the dielectric constant increases with ratio of 0.010 to 0.020 and respond to higher frequencies that can be used in the applications circuit with high frequency.

This research to examine the structure and mechanical properties of aluminum dross. A research project knowledge the aim is to study the microstructure and the mechanical properties of materials. The research is divided into two parts: 1 . preparation aluminum dross material and 2. to determine the structure and mechanical properties. The material must be washed in preparation contamination and dry then crushed and sifted to 200 mesh. Analyzed the microstructure with SEM which indicated the microstructure. The amount of alumina in aluminum dross grade No.0 has 8 0 percent with a powder aluminum dross grade No.1 is a hunk with crystalline alumina component 85 percent. Aluminum dross grade No. 2 which is a big hunk has crystalline alumina components 9 0 percent. Analysis results indicates that aluminum dross can be applied to other aspects such as to produce bulletproof vests and so on.

The aim of this research is to design a prototype of a male dummy chest for motorcycle crash tests. The primary criteria discussed in this study are based on the unique features of Thai ergonomic body sizes with an age range of the highest fatal rate and the fundamental design of the Hybrid III 50th percentile male crash test dummy. A comprehensive experimental study of crash behavior of the prototype undergoing axial compressive loading is performed using the mutual procedure of cadaveric chest testing. For design criteria the largest chest deflection of 80 mm the maximum acceleration of 38.47g and the absorbed energy of 178.369 Joules are considered in the experiment. The obtained results show a good agreement with the experimental data of other researches in which the capability of the energy absorption depends on impact velocities. In addition the energy absorption capability of this prototype can accurately assess an injury level under AIS 3+. For this reason the first prototype of a male chest dummy is particularly suitable for an assessment of a lower serious injury level in a motorcycle crash test.

This study developed the cemented tungsten carbide by steadily sintering at 1430 °C for one hour. The tungsten carbide structure is a long shape. Its grain size has a difference between width and length and there are high distribution of sizes and shapes. In comparison with the work piece which has the similar size of grain structure the milling duration of tungsten carbide is less even though the condition of WC-Co is the same (95% WC – 5% Co). When the sintering of 1400 °C with the identical milling duration is performed. It turned out that both grain structures of the tungsten carbide and the work piece are similar and their grain sizes are slightly different. However when the grain structures are almost the same and sphericity is increased the hardness and wear resistance will also be improved. Therefore the size of grain structure between 1.00 – 3.00 μm with the milling duration of 100 hours will provide a work piece that has a wear resistance according to international standard

Research to develop the studying in the form of E-Book “Subject Fundamental of Drawing the structure of Paperboard Packaging” is done to evaluate the quality of the E-Book and the reaction of the students. The subjects for this research are 100 Undergraduate students and they are studying in the Packaging Design division in the Architectuer and Design department at the Rajamangala University of Technology Phra Nakhon. The title of this research is Package of Environmental Awareness Idea which is theory on Subject Fundamental of Drawing the structure of Paperboard Packaging. Therefore the lesson plant is divided in 7 plants. The results from the quality evaluation forms are very suitable as the researcher hypothesized. The analyzing in a book form was respectful at 3.91. The analyzing in an image form was the best at 4.15 and the last one in an E-Book form was very satisfactory at 3.78 The satisfaction questionnaires are suitable as the researcher assumed as well. The analyzing in a book was at 4.30 the image form was at 4.28 and the E-Book was 4.10 In conclusion quality and the satisfaction factor in this research are very sufficient in all forms; the book the images and the E-Book