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Bangkok, Thailand

Siam University is a university located on Petkasem Road in Phasicharoen district of Bangkok. Siam University was founded by the late Narong Mongkhonvanit as a three-year private engineering school in 1965.In 1973, Siam University, then known as Siam Technical College, was formally established as a higher education institution with authorization to grant degrees. Later in 1986, Siam Technical College became Siam Technical University, a full-fledged private, non-profit university. Three years later, the name was changed again to Siam University to reflect the diversity in the fields of study offered.In 1995, the international college was established. Currently, over 400 international students from more than 15 countries are enrolled in the international college of Siam University.The governing body of Siam University is the university council led by Kasem Wattanachai, councilor of the Privy Council of Thailand. Wikipedia.

Limpawattana M.,University of Georgia | Limpawattana M.,Siam University | Shewfelt R.L.,University of Georgia
Journal of Food Science | Year: 2010

Rice flavor is a significant factor in determining quality and consumer acceptability as exemplified by scented rice, which is highly favored and commands a price premium. Sensory descriptive analysis has primarily been performed to assess rice flavor characteristics, but these studies feature only a limited lexicon for characterizing specific flavors or the range of flavor types is limited. This study was undertaken to establish a descriptive lexicon with reference standards for describing the flavor properties of a broad spectrum of rice types and use the developed lexicon to characterize which sensory attributes are most important in rice flavor quality. A rice flavor lexicon consisting of 24 descriptive notes was developed and expanded by 8 trained sensory panelists to characterize the flavor of cooked rice differing in terms of forms, types, and specialty (n = 36). Of these 24 descriptive terms, 19 were aromatic notes and 5 were fundamental tastes and oral feeling factors. Eighteen aromatic terms were significantly present in most rice samples whereas some descriptors exhibited unique characteristics of a specific-rice type. Subsequent multivariate analysis indicated that 18 descriptive terms were required to fully understand the characteristics of rice flavor in greater details. This lexicon covered a wider range of rice samples than in the previous studies and will facilitate targeting the characteristic notes important to rice processors as well as producers. © 2010 Institute of Food Technologists®. Source

Banchuin R.,Siam University
Journal of Electrical and Computer Engineering | Year: 2013

The novel probabilistic models of the random variations in nanoscale MOSFET's high frequency performance defined in terms of gate capacitance and transition frequency have been proposed. As the transition frequency variation has also been considered, the proposed models are considered as complete unlike the previous one which take only the gate capacitance variation into account. The proposed models have been found to be both analytic and physical level oriented as they are the precise mathematical expressions in terms of physical parameters. Since the up-to-date model of variation in MOSFET's characteristic induced by physical level fluctuation has been used, part of the proposed models for gate capacitance is more accurate and physical level oriented than its predecessor. The proposed models have been verified based on the 65 nm CMOS technology by using the Monte-Carlo SPICE simulations of benchmark circuits and Kolmogorov-Smirnov tests as highly accurate since they fit the Monte-Carlo-based analysis results with 99% confidence. Hence, these novel models have been found to be versatile for the statistical/variability aware analysis/design of nanoscale MOSFET-based analog/mixed signal circuits and systems. © 2013 Rawid Banchuin. Source

Phosrithong N.,Siam University | Samee W.,Srinakharinwirot University | Nunthanavanit P.,Srinakharinwirot University | Ungwitayatorn J.,Mahidol University
Chemical Biology and Drug Design | Year: 2012

Forty-eight chromone derivatives were evaluated for their antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl free radical scavenging assay, ferrous ions (Fe 2+) chelating activity test, total antioxidant activity test (Ferric thiocyanate and Thiobarbituric acid methods), and total reductive capability (potassium ferricyanide reduction). 7,8-Dihydroxy-2-(3′-trifluoromethylphenyl)-3-(3″-trifluoromethylbenzoyl) chromone 32 showed stronger radical scavenging and metal chelating activities than butylated hydroxytoluene, vitamin E, and trolox. Chromone derivatives that exhibited good radical scavenging and metal chelating also displayed strong total antioxidant and reductive power activities. The results obtained from this study indicated that the synthesized chromone derivatives have remarkable antioxidant activity. © 2012 John Wiley & Sons A/S. Source

Romsaiyud W.,Siam University
2014 International Computer Science and Engineering Conference, ICSEC 2014 | Year: 2014

Extracting words, data patterns and topic models from streaming big data by way of real-time processing is a challenging job. Currently, many of applied machine learning techniques in data mining aim to utilize online feedbacks by making model updates faster and quicker. However, Mahout and Massive Online Analysis (MOA) existing solutions are not supported for streaming machine learning, and consequently, not suitable for scalable multiple machines. In this paper enhanced the machine learning algorithms for extracting the words and generating topic models based on the continuing data which was initially proposed. One of the great advantages of the proposed algorithm was the capability to be scaled into multiple machines, in which made it very suitable for real-time processing of streaming data. In general, the algorithm includes two main methods: (a) the first method introduces a principle approach to pre-process documents in an associated time sequence. It implements a class to detect identical files from input files so as to reduce computation time. (b) The second method suits real time monitoring and control of the process from multiple asynchronous text streams. In the experiment, these two methods were alternatively executed, and subsequently after iterations a monotonic convergence was guaranteed. The study conducts the experiments based on a real-world dataset collected from TREC KBA Stream Corpus in 2012. Finally, the accuracy of the proposed method resulted in greater robustness towards the ability to deal with noise and reduce the computation. © 2014 IEEE. Source

Chaiyapinunt S.,Chulalongkorn University | Khamporn N.,Siam University
Solar Energy | Year: 2013

This paper presents a study of thermal performance for a glass window with a curved venetian blind installed on the indoor side in terms of heat gain in the shortwave part of radiation. The curved venetian blind, whose optical properties are considered nonspecular, is modeled as an effective layer. The mathematical model of the combined glass window and venetian blind is developed by combining the mathematical model of glass window and the mathematical model of a curved venetian blind using the matrix layer calculation method. The experiment is performed in a test room to measure the heat gain due to solar radiation passing through the glass window with a curved venetian blind installed in the shortwave part of radiation. The predicted results from the developed model are compared with the experimental results. The agreement between the predicted results and the experimental results is good. From the study it is found that installing a curved venetian blind to the glass window causes a significant reduction in heat gain compared to the plain glass window. The heat gain through the glass window with blind in the shortwave part of radiation (solar heat gain coefficient in the shortwave part of radiation (ShW SHGC)) is analyzed. It is found that the ShW SHGC is mainly affected by the slat properties, slat angle and solar profile angle. The glass window using blind with a lower value of slat reflectance, will have a smaller value of ShW SHGC. The slat distance also affects the ShW SHGC. The glass window using blind with a lower value of slat distance has a lower value of ShW SHGC. The effect of the slat curvature on the ShW SHGC is small when compared to the effect of other parameters. The effects of the investigated parameters on the ShW SHGC for diffuse radiation are similar to the effects on the ShW SHGC for direct radiation. When installing blind to different kinds of glass window other than clear glass window, it is found that the thermal performance is similar to the case of clear glass window. The magnitude of the ShW SHGC for the glass window with blind is also dependent on the optical properties of the glass window used. The glass window with blind using a lower value of the glass transmittance has a lower value of the ShW SHGC. The absorptance of the glass window has direct effect on the solar heat gain coefficient in the longwave part of radiation (LoW SHGC). © 2013 Elsevier Ltd. Source

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