This research is to develop a prototype of a salinity intrusion monitoring system using fuzzy logic to extract salinity values. A system is developed according to a fuzzy logic model using FAOs for appropriate agricultural water quality data considering the electrical conductivity (EC) and total dissolved solids (TDS) as indicators of the salinity value by using the Fuzzy Logic Toolbox to produce and test the generated model. Transformation of the generated models to Embedded C format using the Simulink Coder tool installed in the ARM STM32F microcontroller and a 10-fold cross-validation test was used to validate the data extraction. The Root Mean Square Error (RMSE) for the test results was 0.58175 on average. This research result indicates that the generated model is able to extract data that very closely matches the specified data.

This quantitative research aimed 1) to study operation performance of Thai Gem Businesses. 2) To study factors affecting firm performance of Thai Gem Businesses. The research was collected data by using questionnaire with 452 participants from production group of Thai Gem Businesses. The samples were collected conveniently and analyzed by frequency percentage mean standard deviation Pearson’s correlation coefficient and analysis confirmatory with Structural Equation Modeling: SEM. It was one of all statistic techniques to test for causal relationship of variables. The results found that database information management systems have positively affect strategic management and firm performance of Thai Gem Businesses with significant level 0.05. Database information management systems also have positive affect on strategic management of Thai Gem Businesses with significant level α < 0.05. Besides this research results found that database information management systems has positively direct and indirect affecting firm performance by pass strategic management with direct affect on firm performance equal to 0.346 and indirect affect by pass strategic management equal to 0.575. And total affect was equal to 0.921 with significant level. It showed that overall affect of database information management system on firm performance was more than strategic management affect to Firm Performance (0.603) with significant level 0.05. The analysis of correlation coefficient model showed that measurement between latent variables have positive correlation with significant level α < 0.05. The analysis of Structural Equation Model revealed that it wassuitable harmonize with empirical data ( χ2 / df = 1.489 CFI = 0.997 AGFI = 0.957 RMSEA = 0.08 RMR = 0.004) and consistent with the define hypothesis. The research results described the environmental of firm performance approach to strategic management by TOWS Matrix and recommendation on strategic management to solve problems on firm performance of Thai Gem Businesses in order to develop continuous firm performance for competitive advantage.

This research investigated the effect of antibacterial activity of Guava leaves extract. Antibacterial activity was determined by agar well diffusion method and test with Staphylococcus aureus Bacillus cereus and Escherichia coli. The results showed that Guava leaves crude extract best inhibited the growth of Bacillus cereus followed by Staphylococcus aureus and Escherichia coli with a mean inhibition zone was 22.0 ±0.3 19.00 ± 0.2 and 14.5 ± 0.3 mm respectively. When comparison antibacterial activity between Guava leaves extract with ampicillin 0.010 mg.

Thailand is one of the few countries in the world that provides the whole value chain of the textile industry with over 4700 local textile producers and 800000 to one million workers making this industry the second-most important employment sector. In 2016 the industry’s export revenue was valued at almost USD 7 billion contributing to over 3% of total exports. The Association of Southeast Asian Nations (ASEAN) is the biggest international market for Thailand clothing export (23%) and expected to become the worlds fourth largest market by 2030. However Thai cloth entrepreneurs are facing major problems that demand attention including labour costs new design and product development and in particular online marketing. The Thai fashion and textile industries should define a clear strategic move through integrating textile with fashion with a view “toward sustainable creative industries with strong soft power”. The purpose of this study is to analyse competitiveness of Thai cloth entrepreneurs in relation to online management and integrated marketing communications (IMC) in the ASEAN market. The research instrument involves a descriptive cross-sectional mixed-method study in Thailand. For quantitative data 60 cloth entrepreneurs are invited to complete a questionnaire before and after our “online management and IMC” training programme and a qualitative in-depth interview study is conducted with 10 cloth entrepreneurs. The 2017 survey returned 100% participation with general agreement that a website and Facebook are the most important IMC tools for online marketing in the ASEAN market. Before training the participants had knowledge and skills regarding the ASEAN Free Trade Area (AFTA) online communication and social media tools in intermediate level while they had less knowledge and skills concerning social media web design and online gallery. After training the statistics show an increase in entrepreneurs’ level for all knowledge and skills. Furthermore the findings from in-depth interviews show that with regard to entrepreneurial competitiveness in relation to the ability of online management and IMC there is a requirement for further training and government support. In addition the 10 cloth entrepreneurs agree that time management and quality of product and service control are very important for online business.

The objectives of this theses are: 1) to study the attitude motivation marketing mix and the decision to purchase second-hand brand name shoes from Facebook; 2 ) to compare personal factors i.e. gender age occupation education level that affecting decision to purchase second-handed brand name shoes from Facebook and; 3 ) to study factors affecting the decision to purchase second-handed brand name shoes from Facebook using the quantitative research methodology through an online survey tool in order to collect required data from 400 samples who actually purchased second-handed brand name shoes from 4 different Facebook pages. The pages were: 1) Second-handed shoes on Khao Lam Road FB Page 2) Taii Taew 2nd handed FB Page; 3) Shoes-Project FB Page; and 4) Cho Chopping FB Page. The data was analyzed by finding frequency percentage average t-test One-way Analysis of Variance and Enter Multiple Regression Analysis. The key research findings are: 1) Most of purchasers who decide to purchase second-handed shoes via Facebook are 215 males (62.50%) 162 are at aged over 51 years (40.50%) 178 are private business owners/entrepreneurs (44.50%) 214 posed bachelors degree or are currently studying (53%). 2) The study on motivation attitude for purchasing second-handed brand name shoes from Facebook found that respondents recognized cost saving as the most important key decision making factor in purchasing second-handed brand name shoes (x̅ = 4.36); followed by the user-friendly and uncomplicated purchasing process (x̅ = 4.19). 3) The study on motivation for purchasing the second-handed brand name shoes from Facebook found that the respondents recognized the importance of price advantage when comparing to the new brand name product (x̅ = 4.40) seconded by product limitation and availability in general local market (x̅ = 4.29). 4) Overall marketing mix factors of second-handed brand name shoes on Facebook was at high level (x̅ =3.79) in which price factor is at high level (x̅ = 4.32) followed by distribution factor ( x̅ = 4.23) product factor ( x̅ = 4.04) marketing promotion factor and market factor (x̅ = 3.89) respectively. 5) The study decision to purchase second-handed brand name shoes via Facebook found that respondents recognized the “convenience to purchase secondhanded brand name shoes via online channels fast and diverse in payment methods” as the most important factor (x̅ = 4.14) followed by personal preference (x̅ = 4.10). 6) From the hypothesis found that: 6.1) Gender age and education differences differentiated the decision to purchase second-handed brand name shoes from Facebook with a statistical significance at .05 level. 6.2) Attitude motivation and product marketing mix that included distribution sales & promotion affected the decision to purchase second-handed brand names shoes from Facebook with statistical significance at the .05 level.