The objective of this research was to find an appropriate mixing ratio of concrete with oil palm to produce concrete masonry units with properties equivalent or better than other conventional masonry materials. By trying out method the best proportion of Portland cement: sand: oil palm ash was found at 1:1:2 by weight. The ratio yielded a lightweight concrete with an average density of 766 kg/m3 and average compressive strength of approximately 90 kg/ cm2 which is higher than the minimum requirement of Thai Industrial Standards (TIS) 58- 2533 (1990) of 75 kg/cm2. Water absorption of this proportion was at an acceptable standard level of 20% by weight. From cost analysis the cost of a wall made with the obtained masonry units was about 100 baht per square meter cheaper than lightweight masonry units sold in the market. However the heat conductivity (K) was similar (0.194 W/mk). Moreover the manufacturing process of these masonry units is simple and can be run as a small local enterprise.

The purpose of this research is to study the factors affecting the students๛ achievement and to create the model of the achievement predictive equation on Research Methodology subject Rajamangala University of Technology Phra Nakhon Chotiwet Campus. This research is a correlation research. The population are the third year (4-year-Programme) students of Chotiwet Campus majoring in Food and Nutrition totaling 133. The results of the study revealed that there were two factors affecting the students๛ achievement on Research Methodology as follows : (1) cummulative grade point average and (2) students๛ problem of how to adjust to the study environment. The above-mentioned factors can be formed as model of the Research Methodology achievement predictive equation as follow yˆ = 11.079+3.349 x1 - 1.081 x7

This research aimed to study the marketing of handicrafts from sugar palm fiber and the strategies to enhance compatible marketing and study sugar palm fiber products market and analyze the competition to increase the potential in the handicraft market competition. The methodology used was qualitative research using identified sampling by interviewing the group leaders and the members of local community enterprises who produce handicrafts from sugar palm fiber in four areas in Amphur Sathing-Pha Songkhla Province. The result revealed that there were two kinds of products from sugar palm fiber: weaved and wickerwork and using the products as decorating items to create various style of handicrafts. The marketing of the products composed of selling in festivals made to order and consignment. The main compatible advantages were costing strategies differentiating and Niche or Focus strategy. The palm fiber entrepreneur has high opportunity to succeed due to the increasing potential competition ability. Further more promotion and OTOP products development can make value added to entrepreneurs for sustainability in competition.

The objectives of this research are to propose the mode estimation method of Inverse Gaussian data and to compare three mode estimation methods. Those methods are simple method adjusted mode method with term (n+1)/n and adjusted mode method with term (n+2)/n. The performance of each method can be measured by the absolute bias (|Bias|) and the mean square errors (MSE). This study was performed by using different sample sizes (n) of 5 10 20 30 and 50 whereas the parameter  is fixed to be 1 and parameters  are fixed to be 1 3 5 10 15 and 20. This research used the Monte Carlo Simulation technique. The experiment was repeated 50000 times for each condition. The results showed that the adjusted mode method with term (n+2)/n gave the lowest value of |Bias| and MSE in most of the criterions of sample sizes and parameter values.

This study surveyed seventeen wastewater treatment plants in concentrated latex rubber and seafood industries in southern Thailand. The researchers concerned mainly in the bulking sludge problems caused by filamentous bacteria. Wastewaters from those factories contained high organic contents high BOD5 and TKN concentrations. All of the existing activated sludge process were equipped with other pre- and post-treatments. Sixteen of them were concerned with only carbon and suspended removal. They were operated with high hydraulic retention time (HRT) and low food per microorganism ratio (F/M ratio) which are the main causes of bulking sludge problem. Most operators faced up with this problem but could not realize the reasons and solutions. This study observed their settle ability and presented filamentous bacteria in each plant. It can be evidently seen that some filamentous bacteria such as type 0041 and Nostocoida limicola II appeared at seafood treatment plants only and type 1863 found in rubber treatment plants only. This can be affirmed to the nature of influent composition of wastewater.