The bulletproof plates with materials that can convincingly be destroyed by the 7.62 mm bullet with its speed at 878 ± 9.1 m/s were developed by designing according to the National Institute of Justice Level 4 (NIJ 4). The plates were made of two flat sheets stacking SKD11 and SUS304. Their components were composed of the front and back plates; the first sheet made of SKD11 material hardening at 65 HRC with a thickness of 6 mm and the back plate made of SUS 304 material with a thickness of 5 mm. The finite element method was applied to simulate and analyze the results to demonstrate the bullet resistance to the perforation by setting perpendicular sheet to the bullets. Therefore the simulating studies for the bullet firing were demonstrated by locating its angles of 15 30 45 and 60 degrees to the SKD11 sheet with a thickness of 6 8 and10 mm coupled with the SUS304 sheet with a thickness of 5 6 8 and 10 mm. These plates were stacking into two layers then the finite element method was applied to simulate one at a time. The results showed that the first sheet of SKD11 with 6 mm of thickness could resist the perforation of the bullet at 60 degree and the plate thickness of 8 and 10 mm could start resisting to the perforation at 45 degree. The second sheet of SUS304 with the thickness of 5 6 8 and 10 mm were incapable to resist to the perforation and the refraction of the bullet direction as good as that of SKD11. Therefore the principle applying two metal sheets stacked into layers was essential to impel the resistance of the bullet perforation and change the direction of the bullet.

The purposes of this research were to 1) study marketing opportunities of Samutsakorn’s processing herbal product with betel leaf 2) present the marketing strategy of startup business in processing herbal product. with betel leaf The samples were 1) person has problem about skin and person interest for thai herbal product 2) entrepreneur of startup business about processing herbal product with betel leaf 3) farmer group grow betel tree in Samutsakorn Province. The research instruments were depth interviewing and descriptive analysis. According to the research process it found that the great market trend for Thai herbal product and increasing capability of entrepreneur of startup business about processing herbal product with betel leaf is market opportunities for processing herbal product. Moreover marketing mix strategies of processing herbal product with betel leaf consisted of product strategies price strategies place strategies promotion strategies which could be used to recommend the marketing strategies in order to meet future local and national market needs.

This research aims to study 1) personal factors affecting confectionery brand loyalty 2) and the service marketing mix factors affecting confectionery brand loyalty. The service marketing mix can be used to create a change in consumer behavior to buy and drive subsequent purchases. Samples were drawn from a population aged between 15-60 years in Bangkok for 400 people sampling. The data collection was done by an interview with questionnaires. The statistics used to analyze the data were descriptive statistics like mean and standard deviation while inferential statistical analysis was T-test F-test and regressing analysis. The results were as follows: 1) most samples were female with Bachelors degrees single status private employee status and a monthly income of 10001-15000 baht. 2) Service marketing mix factors had a high impact on brand loyalty. If sorted in descending orders those are product personnel and process respectively. 3) Demographic factors affecting the brand loyalty of dessert when different levels of education had different effects on purchasing intention and complaint behavior while tested statistically significant at the 0.05 level. 4) The statistical correlation tested in the service marketing mix found a relationship with brand loyalty in all aspects of the services marketing mix with confectionery. The most correlated values were physical components at a moderate level followed by marketing promotion and distribution at an average level. Personnel products and prices had an effect at low levels respectively.

In 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.