The objective of the study is to investigate the cause of double-decker accident by in-depth accident investigation method. The method could describe the critical conditions of the accident which include pre-crash during-crash and post-crash. Moreover the influencing factors of the accident can also be best explained by the method. In this study the rollover of double-decker accident is selected as a case study. The main reason is that in Thailand the double-deckers are usually used for sight-seeing purpose and there are also many reported severe accidents. In this study it is found that the factors of the accident consist of speed dimension of double-decker road condition and geometry of the accident place.

This paper presents the design and construction of an ultrasonic scaler. The principal of Phase-Locked Loop circuit inside the IC 4046B controls the 25-kHz frequency generator with constant phase and frequency.The coil inside the hand-piece sheath produces the magnetostriction process with the magnetostrictive stack which works only at 25-kHz frequency. This proces causes the magentostrictive stack to expand and contract with high frequencies making the scaler tip to vibrate more than 20000 times per second. This dental scaler could be used to eliminate the micro-organisms in the form of plaque or tartar and dirt in the gum groove and around the tooth root surface. This tool is as effective as and cheaper than the imported equipment used by dentists. In addition the construction of an ultrasonic dental scaler helps the staff to improve their maintaining skills.

This article presents the energy conservation of the wood furniture factory in Samutprakarn province by using engineering management technique. The electrical energy of 7408000 kWh per year or 25988055 Bath per year is mainly used in the processes including a heating energy system that is derived from wood scrap. After detailed audit it was found that 8 measures have a potential to improve energy efficiency. 7 measures for electrical energy can reduce the energy of 479837.60 kWh per year and the rest decreases heating energy of 120297.15 MJ/Year or saving the scrap of 9.4 tons per year. In order to assess economic possibility all measure also were considered. The result showed that it was worth to investment. In addition specific energy consumption (SEC) can be improved from 0.57 kWh/ft3 to 0.54 kWh/ft3 or diminishing of 5.26 %

The purpose of this research is to develop learning package for an operating system course on process status for undergraduate students majoring in computer engineering. The technique of creating the cartoon story for difficult content is used to compare the process status and the steps of buying meals to enhance students’ understanding of process management. The participants are divided into two groups; the control group learning with the traditional method the experiment group learning with the learning package. The research result was that the achievement of the experimental group was higher than the control group. In addition the students were interested in learning and the students’ satisfaction is at the high level.

This research aims to study the marketing mix factors that influence consumers’ purchasing decisions and to compare the marketing mix factors that influence purchasing decisions of consumers in the Seacon Square shopping mall. It was found that the marketing mix factors that influence the buying decisions of customers in the Seacon Square shopping mall were at the high level in every criteria. The product factor was at the highest level. The following are the distribution channel promotion marketing and pricing respectively. A comparative study of the marketing mix factors that influence consumers’ purchasing decisions by the nature of personal information showed that customers having different age and status had different marketing mix factors in the purchasing decision statistically at the 0.05 level.But the customers with different gender educational level occupation and average revenue per month had indifferent factors that affect the marketing mix decisions statistically at 0.05.