This research explores the determinants of market liquidity and trading activity in the Stock Exchange of Thailand during the period of 2001 to 2009. Only some weak evidence is found. Short-term and long- term interest rates have a positive effect on some of market liquidity and trading activity’s variables. Long-term market performance is found to be a negative predictor variable of depth, while lagged volatility has a negative relation with market trading activity’s variable. This...

This study aimed to investigate two objectives including: 1) to compare mathayom 1 students’ creative writing ability after taking the online creative writing instruction (OCWI) and face-to-face creative writing instruction (FCWI); 2) to explore mathayom 1 students’ motivation after taking the OCWI and FCWI. The instruments used in this study were a paper-based creative writing pre-test and a paper-based creative writing post-test, online creative writing instruction, lesson plans for online creative writing instruction and face-to-face...

This study has the objective to investigate the needs of English preparation for undergraduate students in the Faculty of Architecture in response to the ASEAN Economic Community (AEC) across three groups of samples, namely undergraduate students, instructors in the Faculty of Architecture, and stakeholders in the field of architecture. Moreover, it also explores the opinions of these samples regarding the English preparation for the AEC and English courses that are currently provided by the Faculty...

Electron donors are added to Ziegler-Natta catalyzed propylene polymerization to enhance the productivity and isotacticity of polymer products. The development of new electron donors becomes the key target in designing new generation catalysts for propylene polymerization. In this research, relationships between the activity/property and structures of 3 groups of electron donor were investigated by QSAR/QSPR approaches. All three QSAR models of phthalates, 1,3-diethers and malonates showed good predictive ability (R2≥0.93, R2CV≥0.84). However, the usage of...

Dehydration reaction is an important and basic technology for converting ethanol into ethylene product which temperature is less than pyrolysis reaction. It is also considered as alternative energy for future. Many researches improve and modify catalyst in order to obtain high selectivity. The selectivity factor mostly depends on acidity on a catalyst and temperature, which is catalytic early degradation. In this present study, the mixed gamma and chi crystalline phases of alumina catalyst calcined at...

Microalgae is biomass which can be used as an alternative energy source since it has high performance to produce high content of liquid fuel and it also has high growth rate. This research work presents the method to convert microalgae as the liquid fuel via hydrothermal liquefaction in semi-continuous reactor under high temperature and pressure to degrade microalgae as organic compounds with smaller molecules. The objective of this research was to study the production and...

Enantiomeric separation of forty alcohols based on 1-phenylethanol was studied by gas chromatography using heptakis(2,3-di-O-acetyl-6-O-tert-butyldimethylsilyl)-ß-CD (or BSiAc) as a chiral stationary phase. Factors affecting analyte retentions and enantioselectivities were studied: column temperature, alcohol structure (type and position of substitution) as well as type of alcohol derivatization (trifluoroacetyl (TFA) and trimethylsilyl (TMS)). The number of underivatized alcohols that could be separated into their enantiomers was higher than those of derivatized forms. Temperature affected enantioselectivities of meta-substituted...

Quantum efficiency (QE) measurement is one of several methods used to investigate solar cell performance, especially the carrier collection. It indicates the amount of photogenerated current produced when a solar cell is illuminated by photons of a particular wavelength. In this study, a quantum efficiency measurement system was constructed and the CuIn1-xGaxSe2 (CIGS) – based thin film solar cells with different growth conditions were characterized. The results show an influence of differences in band gap...

Double displacement process (DDP) is an efficient method to increase oil recovery by starting with water injection and followed by gas injection. In order to reduce the cost of gas injection units, the concept of gas dumpflood is utilized by using multiple thin gas layers as the gas source. In this study, the effects of the perforation program, operational liquid rates and characteristics of gas reservoirs are evaluated using reservoir simulation. Perforating full to base...

Two- and three-dimensional droplet movements are simulated on vertical direction by using smoothed particle hydrodynamics (SPH), which is a numerical meshfree method. With this technique, the fluid is divided into discrete elements, referred as "particles". Simulating the droplet hanging on the vertical wall, Navier- Stokes equation combined with the surface tension force which models from interaction between particles which is different in the context of fluid-fluid, fluid-wetted area, or fluid-not wetted area, is applied. The...