The objectives of this research are to propose a Bayesian model for spatial time series analysis to apply the proposed model to forecast a monthly rubber yield in Southern provinces of Thailand and to compare the performance of the proposed model with the classical Holt-Winters Additive Exponential smoothing. The proposed model is a linear mixed model (LMM) with spatial effects which follow a conditional autoregressive model (CAR). Dummy variables are used for seasonal effects. A Bayesian method is used for parameter estimation. The estimated monthly yields are used for the monthly rubber yield forecasting. The dependent variables are the rubber yield in each month of each province. The data are secondary data at a provincial level. The factors considered are spatial effects heterogeneity effects and seasonal effects. The results show that the factors influencing on the amount of rubber yields are spatial heterogeneity and seasonal effects. The proposed model is proper and forecast accurately. Using the mean absolute error (MAE) the proposed model has a better performance compared to the classical Holt-Winters Additive Exponential smoothing in both model fitting and model validating. The proposed model should be the first consideration for spatial time series forecasting.

This study aims to development of production process of hard metal by tungsten carbide powder with the particle sized of 0.1 - 0.35 µm. This carbide powder were made of recycling cemented carbide tool scraps so it is mixed with Ta = 2.82 % Mo = 0.45 % Nb = 1.22 % Ti = 4.56 % Zr = 0.37 % The shape of the carbide powder are roughly round due to ball milling for 300 hours. It was mixing cobalt 10 % and Paraffin wax 2 % which is found the work piece that running through the process of sintering with a temperature of 1400 °c and 1430 °c have the hardness of 1368.5 and 1346.3 HV respectively. In one hour of holding time process the work piece with 1430 °c of the sintering causes less wear. After the test of turning operation it can be concluded that the tungsten carbide cutting tool provides the equivalent quality as a standard cutting tool.

This Research purposes assessment of lightning performance on transmission system 69 kV in Metropolitan Electricity Authority (MEA). The case studies illustrated the lightning strike to direct top pole in order to guideline considering the critical flashover voltage value of insulator is able to withstand it and improvement lighting protection in the future. This solution analyzes using the Alternative Transient Program-Electromagnetic Transient Program (ATP-EMTP). The result found that voltage across insulator before and after improvement lightning protection by external ground wire. Factor effect to voltage across the insulators is the tower footing resistance wave of lightning current and interval between towers. It depends on relation with front time of wave. The analysis economics is very important. This Research is studying interruption cost of outage since back flashover so analysis the break even point of the installation external ground. The result found upon improvement lightning protection by installed external ground. The pay back period of that is 9 years installed ago. This result can conclusion is external ground able reduction interruption costs of outage.

The objective of this research were (1) To study the Influence of supervisor’s transformation leadership on job satisfaction; (2) To study the Influence of supervisor’s transformation leadership and job satisfaction on organizational commitment; (3) To study The Influence of transformation leadership job satisfaction and organizational commitment on employee’s job performance (4) To validate a causal relationship model of influence of supervisor’s transformation leadership on job satisfaction organizational commitment and employee’s job performance of Tisco Bank Public Company Limited. The variables in this investigation consisted of the following; supervisor’s transformation leadership as the independent variable; and job satisfaction on organizational commitment as mediating variables and employee’s job performance as dependent variable. The researcher used quantitative methods which involved empirical research. The instrument of research was a questionnaire used to collect data form 345 personnel of Tisco Bank Public Company Limited. The statistics used in data analysis were frequency mean percentage and structural equation model analysis. It was found that the model was consistent with the empirical data. Goodnessof fit measures were found to be Chi-square (2) = 198.935; Degree of freedom = 169; p–value = 0.057; Relative Chi-square (2/ df) = 1.177; Goodness of Fit Index (GFI) = 0.950; Adjusted Goodness of Fit Index ( AGFI) = 0.925; Comparative Fit Index (CFI) = 0.997; Standardized Root Mean Square Residual (SRMR) = 0.039; and root Mean Square Error of Approximation (RMSEA) = 0.023. It was also found that (1) supervisor’s transformation leadership had a positive direct effect on job satisfaction; (2) supervisor’s transformation leadership had a positive direct effect on organizational commitment; (3) job satisfaction had a positive direct effect on organizational commitment; (4) organizational commitment had a positive direct effect on employee’s job performance; and (5) supervisor’s transformation leadership had a positive direct effect on employee’s job performance. On the basis these findings the researcher recommends that Tisco Bank Public Company Limited more fully focus on transformation leadership to deepen job satisfaction and organizational commitment and employee’s job performance.

This study was aimed to explore opinions of electronic correspondence officials to study their satisfaction level toward electronic correspondence and to investigate effectiveness level of electronic correspondence officials working at Royal Aide-De-Camp Department. The population was 25 officials who worked at electronic correspondence office of Royal Aide-De-Camp Department. The data were collected in January 2015 and analyzed by a computer software program using the frequency distribution percentage distribution mean ( ) and standard deviation( ). The result of the analysis revealed high level of opinions of 25 electronic correspondence officials working at Royal Aide-De-Camp Department that most of the respondents were male noncommissioned officers ranging from 29 to 39 years old with bachelor’s degrees and having two to five years’ experience or more. They were based at military logistics office. Also their satisfaction toward electronic correspondence was relatively high as well as the effectiveness level. As for problems of electronic correspondence male officers were found having more trouble on insufficient number of computers and their frequent deficiencies and slow downloading. The highest scores were from the users’ satisfaction caused by convenient work facilitation and time saving. In terms of effectiveness most respondents thought that the system was computably accurate and complete with the effective users’ verification system backup system data protection and simple and swift computation. Future studies should be done to electronic correspondence performance between different workplaces such as the electronic correspondence of Royal Aide-De-Camp Department and Ministry of Defense Deputy office in order to compare problems opinions and effectiveness of different electronic correspondence offices.