This study investigates three different types of power plant include a trilateral cycle (TLC) subcritical organic Rankine cycle (ORC) and supercritical ORC power plant driven by geothermal heat source with mass flow rate 1 kg/s and temperature of 100๐C 110๐C and 120๐C. with 27 substances were examined as the working fluid of the power plant. While the net power output of 4.78 kW and 7.74 kW is obtained from the subcritical ORC with RC318 as its working fluid when the heat source temperature are at 100๐C and 110๐C respectively. Meanwhile the net power output of 11.85 kW is obtained from the subcritical ORC with R227ea as its working fluid when the heat source temperature is at 120๐C. The net power output of 5.64 kW and 9.16 kW are obtained from the supercritical ORC with R218 as its working fluid when the heat source temperature are at 100๐C and 110๐C respectively. Meanwhile the net power output of 12.88 kW is obtained from the supercritical ORC with R143a as its working fluid when the heat source temperature is at 120๐C. Furthermore the net power output of 7.96 kW 12.27 kW and 17.38 kW are obtained from the TLC plant with heptane as its working fluid when the heat source temperature are at 100๐C 110๐C and 120๐C respectively.

The purposes of this research were: 1) to study the individual factors of consumers in Chonburi Province 2) to investigate the marketing mix factors used for purchasing decisions of traditional Chinese pastry cake products of consumers in Chonburi Province 3) to find out the purchase decisions of traditional Chinese pastry cake products of consumers in Chonburi Province 4) to examine factors affecting the purchase decisions of traditional Chinese pastry cake products of consumers in Chonburi Province and 5) to establish guidelines for the development of Chinese pastry cake products for consumers in Chonburi Province. The sample in this study included 400 consumers in Chonburi who chose to buy Chinese pastry cake products and 7 business owners who sold Chinese pastry cake products. The research instruments consisted of questionnaires and interviews. The data were analyzed by using statistical analyses: frequency percentage mean standard deviation chi-square and descriptive data analysis. The results can be summarized as follows: 1) Most of the consumers were female between the age of 31-40 running a private business with an average monthly income of 20001 - 30000 baht and 74% of the study sample reside in Chonburi Province. 2) Overall consumers’ attention for the marketing mix was at a high level. When considering each aspect of the marketing mix factors the results reported that customers’ attention for the marketing mix from the most to the least: location individual price customer service marketing promotion and products. 3) The consumers purchased pastries as gifts or souvenirs for other people. Most of them bought a mix of golden bean paste pie and pumpkin in syrup once a month (3 - 4 pieces about 201 - 500 baht each time). Most consumers bought those desserts for themselves. 4) Factors affecting Chonburi consumers’ purchase decisions for Chinese pastry cake products were as follows: 4.1) The individual factors affecting consumer’s purchase decisions involved gender age occupation and average monthly income. Those factors affected the purchase decisions of Chinese pastry cake products of consumers in Chonburi Province with statistically significant differences at the .05 level. The residence of the consumers however did not result in purchasing decisions of Chinese pastry cake products at the .05 level of significance. 4.2) Marketing mix factors affecting consumers’ purchasing behavior included products price distribution marketing promotion personal factors location and service with significant results at the .05 level. In addition to the guidelines on how to develop Chinese pastry cake products for consumers in Chonburi Province the business owners should improve the pastries to attract market demand. Packaging improvement should be a combination of modern and traditional styles. The price should be various based on the types of products. Also developing distribution channels through social media and the decoration of attractive storefronts with Chinese themes should be implemented. Moreover there should be advertising through social media. Employees should be trained on the product and customer service knowledge. The store must be easily accessible to common people using public transportation. The shop owners should focus on the quality of the customer service and customer satisfaction enhancement.

An ability of fresh banana peel without surface modification was evaluated for the removal of lead ions from aqueous solution. Batch adsorption was performed at room temperature. The experimental conditions including dosage contact time initial concentration of lead( II) ion were studied. The characterization of fresh banana peel was carried out by Fourier-transform infrared spectroscopy (FTIR) and energy dispersive X-ray fluorescence ( ED-XRF) . The isotherm models of Langmuir and Freundlich were used to describe the adsorption mechanism involving the relationship between adsorbent surface capacity and adsorbed degree of lead(II)ion in the equilibrium conditions. The experimental data fitted well to the Langmuir isotherm with a correlation coefficient of r2 greater than 0.86. The Maximum adsorption capacity (qm) was found to be 0.9151 mg/g. The results of ED-XRF of fresh banana peels before and after treatment with lead( II) ion confirmed that lead( II) ion was occupied onto the surface of fresh banana peel. Moreover the inside of fresh banana peels was found the lead(II)ion larger than the outside peels. It was concluded that waste of banana could be used as a low-cost adsorbent for removal of lead(II)ion from aqueous solution based on a simple adsorption method.

This research aimed 1) to study levels of transformational leadership innovative climate knowledge management systems innovative work behaviors and firm performances 2) to investigate causal relationship of transformational leadership innovative climate knowledge management system as well as innovative work behaviors which influenced on performances of the Medical Device Business in Thailand 3) to examine relevance of those variables along with causal relationships of the antecedents affecting performance of the Medical Device Business in Thailand to empirical data. Data were collected from 312 middle level managers in Medical Device Business in Thailand by using questionnaires as a research instrument. All of the data were analyzed using Structural Equation Model. The analysis of correlation coefficient model showed that the latent variables significantly related to one other at statistical level of 0.001. The analysis of structural equation model (SEM) revealed that the model was completely compatible with the empirical data and the hypothesis. (GFI = 0.933 CFI = 0.972 RMSEA = 0.078 RMR = 0.018) The findings also showed that transformational leadership significantly affected innovative work behaviors at statistical level of 0.001. Similarly innovative climate significantly affected innovative work behaviors at statistical level of 0.001. Likewise knowledge management system significantly affected innovative work behaviors at statistical level of 0.001. Finally innovative work behaviors significantly and directly affected the firm performance at statistical level of 0.05.

This research presents the development of ultrasonic scaler for mobile dental unit. The operation of the scaler uses a phase-locked loop circuit to generate high frequency electrical signal. Then the signal is amplified with a Darlington amplifier circuit to feed to the coil in the Hand Piece resulting in Magnetostriction. This phenomenon causes the stretching and shrinking of the magneto-strictive stack with high frequency which causes the tip of the scaling head to vibrate more than 20000 times/second. Traditional ultrasonic scaler for mobile dental unit has thermal problem of the amplifier circuit due to use of the transistors as the switching devices. When used for a period of time the scaler is necessary to stop working resulting in not much scaling per day. This research solved the problem by using MOSFETs as switching devices and adding cooling system to the amplifier circuit. The experiment was carried out using actual conditions. The experimental results show that the developed scaler has increased the number of scaling per day. In addition it will still remove plaque and dirt in the gumline around the base of the teeth similar to the scaler used by general dentists.