The objectives of this research are to propose a linear mixed model (LMM) with spatial correlation for an analysis of rice yields in Thailand to estimate the rice yield in each month of all provinces in Thailand to investigate factors influencing on the rice yields and to construct the maps of rice yields. A linear mixed model (LMM) in which the spatial effects follow the conditional autoregressive model (CAR) is used. The estimated rice yields are used to construct the rice yield maps. The dependent variables are the rice yield in each month of each province. The data are secondary data at a provincial level. The factors considered are rainfall averaged temperatures and regions. The results show that the factors influencing on the rice yields are rainfall averaged temperature and region. The amount of regional effects ordering from largest to smallest values are northestern region southern region western region central region eastern region and northern region respectively. The top ten provinces and months with high yields ranking from largest to smallest values are Ubon Ratchathani in November (1328000 ton) Surin in Novermber (1070000 ton) Si Sa Ket in Novermber (1023000 ton) Buri Ram in November (939400 ton) Nakhon Ratchasima in November (907500 ton) Roi Et in Novermber (852800 ton) Chiang Rai in Novermber (769800 ton) Khon Kaen in Novermber (692800 ton) Maha Sarakham in Novermber (676200 ton) Udon Thani in Novermber (620600 ton) respectively. The rice yeilds maps are easy for readers to identify which areas have high or low yields. They are a useful tool for planning decision making and implementing plans to help rice famers to increase their rice production.

This research is to study in heat transfer of hot water tank from an air conditioner which is a cylinder type and has a hot water pipe around the tank. It is used for finding a position and a pattern of distribution of the hot water pipe around the tank in the highest heat transfer condition. The study uses the cylinder of hot water tank filled 45 liters of 25 oC water. An experiment separates in 3 positions of pipe wrapping which are the bottom the center and the top of the tank. Then 80 oC of hot water run thought the hot water pipe which is wrapped around the tank for 120 minutes. The result of the experiment shows that tubing position that causes the highest heat transfer is at the bottom of tank. Pipe wrapping at the bottom of the tank has the heat transfer higher than the top of the tank at 30%. Furthermore this experiment studies in spacing of hot water pipe. There are 3 types for testing which are spacing hot water pipe as one time two times and three times of diameter of pipe. The result illustrates that spacing the hot water pipe can significantly increase the heat transfer. The heat transfer of spacing the hot water pipe in three times of diameter of pipe is higher 5.8 % than spacing in one times. In addition this research is to study in the effect of turbulent flow on the heat transfer by installing agitator in order to stir water in the tank. The result is that water stirring in the tank for increasing the heat transfer is not effective for investment because the energy using for stirring is higher than the enhanced heat transfer

The purposes of this study aim 1) to evaluate the academic achievement and 2) to study learners satisfaction towards teaching multimedia in the Course Ngor30275 Commercial Flower Arrangement Unit 6 Introduction to Flower for high-school students of Chaichimplee Wittayakom School Bangkok. Sample in this study is 30 students who attended Sports and Home Economics Program and chose Home Economics Course in to 2nd semester of the academic year 2019. According to studies 1) the result of the teaching multimedia proficiency assessment on the content basis by 3 experts was at the highest level by all accounts and the mean was equivalent to (X̅ =4.73S.D. = .31). And the result on the multimedia basis was also at the highest level and the mean was equivalent to (X̅ = 4.63 S.D. = .29) . 2 ) the assessment in the performance of a representative sample of students in the 8 different patterns using scoring rubrics whose standards were at every high level. 3) the assessment on the student’s satisfaction with the teaching multimedia for 8 patterns were as follow Pattern #1 - Spherical Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.61 S.D. = .06) . Pattern #2 - Equilateral Triangle Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.72 S.D. = .05). Pattern #3 - Scalene Triangle Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.61 S.D. = .03). Pattern #4 - Tall Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.68 S.D. = .06). Pattern #5 - Short Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.64 S.D. = .06). Pattern #6 - Long-Bouquet Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.66S.D. = .05). Pattern #7 - Circular-Bouquet Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.69 S.D. = .05). Pattern #8 - Flower Arrangement Pattern the overall satisfaction analysis result was at the highest level and the mean was equivalent to (X̅ = 4.72 S.D. = .08).

The purpose of this research were to 1) study the production factors and efficiency of fireproof suit; 2) analyze the three line balancing models of fireproof suit; and 3) make comparison of production efficiency for fireproof suit’s manufacturing processes. A group of representative sample for assessments is 90 dressmakers of Creative Polymers Co. Ltd. The used tool for collecting data is the data recoding form consisting of production process list data recording date processing operation and duration of processing. Accordingly put the sewing line layout and make production test with the three line balancing models of fireproof suit then record all data and entry all data to SPSS program to average statistics on percentage and standard deviation. The research showed that the improvement of the three line processing models of fireproof suit comparing to the data of the three line balancing models are identified that C model increased from traditional production system 74.05 percentage B model increased from traditional production system 57.51 percentage then A model increased from traditional production system 48.53 percentage. The result showed that the fireproof suit’s production processing of Creative Polymers Co. Ltd. ought to take the C model in order to fasten production process and augment better quality. A minimum process of producing is amount of 110 steps with less time per one unit; minimum 177.41 minutes; with 30 workers; and 27 machines. The waste product of the three line processing models: A B and C model; not over 20 percentage during 8 hours of working. It shows that the c model has the least of waste product. The over operation that product has not much wasted not include in choosing the model for improving production efficiency and C model

The purpose of this research is to study productivity improvement at electronic parts’s assembly line finding the work stations with work station time longer than takt time. This research applied the 5W1H technique as a tool to problem analysis fundamental of hand motions to improve productivity. The study found that the assembly line consisted 15 work stations and a cycle time of 12.0 seconds which greater than the takt time which was 10.5 seconds. The work station time no.6 took longer than the takt time. The fundamental of hand motion technique was applied. By separating or eliminating the fundamental of hand motion did not affect the performance of the work stations. By being integrated the fundamental of hand motion with previous work station or next work station. As a result of research is the new cycle time of this production line is 10.0 seconds the production line capacity increased from 300 pieces per hour to 360 pieces per hour 20 percent increase