This research studied the flow of fluid through a rectangular barrier with the Lattice Boltzmann Method. The concept of this method relies on the streaming and collision of particles with respect to the conservation laws of mass and momentum. The objective of this research was studied patterns of fluid flow through the obstruction and Reynolds number to affect the flow pattern. The simulation showed that the flow pattern changes from laminar flow to turbulent flow when Reynolds numbers increased. In accordance with the theory.

This paper presents distributed STATCOM for controlling voltage in distribution line with wind turbines generations at 48 volts. The connection of wind turbine to distribution systems may affect the voltage quality offered to the consumers. One of the factors contributing to this effect is the rapid variations of the wind turbine output power which cause respective fluctuations in the supply voltage. This paper presents the design control and analysis of a Distributed STATCOM when combined with a wind turbine comprising small variable speed generators in this paper it is shown that the distributed STATCOM controlled via a rotating referent frame: RRF and recursive DFT are simple method to DSP control technique. The result of experiments the STATCOM can improve the transient stability voltage of wind turbine that we have referred the IEEE1159:1995 standard of power quality.

The aim of this research is to paint silk fabric with batik technique using five natural dyes from margosa bark lac mango leaves marigold and otaheite gooseberry bark. The pre-mordant and after-mordant techniques were used in this work. Ten mordants Aluminum potassium sulphate Copper (II) sulphate Sodium dichromate Tannic acid Tartaric acid Tin (II) chloride and Calcium acetate-monohydrate were applied. The batik fabrics were characterized in color strength rubbing fastness washing fastness light fastness and stiffness. The result indicated that silk fabric painted with natural dye from margosa bark could use all 10 mordants to improve color strength and gave various shades of color. The silk fabric painted with natural dye from lac could not use all 10 mordants to improve color strength but it gave various shade. The silk fabric painted with natural dye from mango leaves marigold and otaheite gooseberry bark showed that almost 10 mordants gave higher color strength and various shade. The mordanting technique would give good fastness and reduce the stiffness of batik fabric.

Electrospinning is an interesting technique with various potential applications. CeO2 fibers production was achieved via this technique. In this work the prepared condition and the fiber morphology were investigated and described. The optimum condition was 15 kV 7 cm in distance between needle tip and ground collector 50 wt% of i-propanol in the co-solvent. The obtained fibers were continuous with a diameter of 900 nm. The smooth electrospun fibers produced were dried for one hour and then calcined at 450 OC for 3 hours. The calcined fibers were reduced to 600 nm and cracked on the fibers. They were ceria fibers what verified by EDX and XRD pattern. They had high specific surface area to volume ratio and monolith fibers which is applied for catalytic applications.

The purposes of this research were 1) to study the effect of short message service via mobile telephone on Sufficient Economy Philosophy of undergraduate students at Rajamangala University of Technology Thanyaburi 2) to study the students’ opinions to short message service via mobile telephone on Sufficient Economy Philosophy of undergraduate student at Rajamangala University of Technology Thanyaburi. The experiment group was 30 undergraduate students at Rajamangala University of Technology Thanyaburi in Educational Technology academic year 2007. The data were analyzed by percentage mean standard deviation and t-test. The research findings were as follows: 1) It was found that the post-test score learning was statistically higher than pre-test scores at level .01. 2) It was found that the students’ opinions to short message service via mobile telephone were in a good level.