Nakhon Ratchasima, Thailand

Suranaree University of Technology
Nakhon Ratchasima, Thailand

The Suranaree University of Technology ) is in Nakhon Ratchasima, Thailand. The university was established on July 27, 1990, becoming fully operational in 1993.It is named after Thao Suranaree, the local heroine of Nakhon Ratchasima. It has been entitled as 1 of 9 National Research Universities of Thailand since 2009.Suranaree University of Technology is the first ever university in Thailand that initiated Trimester System for its educational management consisting of 13 weeks for each trimester providing enough time for students to concentrate on their study more effectively. It also enables the university to integrate cooperative education into every curriculum at an undergraduate level in which students can have hands-on experience at the workplace, full-time, and more time to enrich their practical knowledge and skills. It has recently been selected as an international satellite office of the World Association Cooperative Education .Suranaree University of Technology houses the National Synchrotron Research Center that enables advanced research on physics, materials science and related areas. The School of Physics has been ranked as the first in the country consecutively. In addition, the university has been recognized as one of the most productive institutions. It is the youngest institution among the nine National Research Universities of Thailand. Wikipedia.

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Koonsrisuk A.,Suranaree University of Technology | Chitsomboon T.,Suranaree University of Technology
Energy | Year: 2013

The solar chimney power plant is a system with promise to generate electrical power from free solar energy. In this study, a solar collector, chimney and turbine are modeled together theoretically, and the iteration techniques are carried out to solve the resulting mathematical model. Results are validated by measurements from an actual physical plant. Moreover, the model is employed to predict the performance characteristics of large-scale commercial solar chimneys, indicating that the plant size, the factor of pressure drop at the turbine, and solar heat flux are important parameters for performance enhancement. In addition, the study proposes that the most suitable plant, affordable by local government standards to respond to the electricity demand of a typical village in Thailand, is the one with a collector radius and chimney height of 200 m and 400 m, respectively. Furthermore, it is shown that the optimum ratio between the turbine extraction pressure and the available driving pressure for the proposed plant is approximately 0.84. A simple method to evaluate the turbine power output for solar chimney systems is also proposed in the study using dimensional analysis. © 2012 Elsevier Ltd.

Koonsrisuk A.,Suranaree University of Technology | Chitsomboon T.,Suranaree University of Technology
Energy | Year: 2013

The solar chimney power plant is a solar power plant for electricity generation by means of air flow induced through a tall chimney. Guided by a theoretical model, this paper uses CFD technology to investigate the changes in flow properties caused by the variations of flow area. It is found that the sloping collector roof affects the plant performance. The divergent-top chimney leads to augmentations in kinetic energy at the chimney base significantly. The proper combination between the sloping collector roof and the divergent-top chimney can produce the power as much as hundreds times that of the conventional solar chimney power plant. © 2013 Elsevier Ltd.

Widjaja J.,Suranaree University of Technology
Applied Optics | Year: 2010

A new method for improving fingerprint detections by a compression-based joint transform correlator (JTC) via wavelet filter is proposed. The simulation results show that the proposed method has advantages over the conventional compression-based JTC in that detection performance can be maximized to be higher than a classical JTC by using a smaller file size for the compressed-reference images. © 2010 Optical Society of America.

Lapsongphon N.,Suranaree University of Technology | Yongsawatdigul J.,Suranaree University of Technology
Food Chemistry | Year: 2013

Antioxidant peptides of mungbean meal hydrolysed by Virgibacillus sp. SK37 proteinases (VH), Alcalase (AH) and Neutrase (NH) were investigated. The antioxidant activities based on 2,2′-azinobis (3-ethyl-benzothiazoline-6- sulphonate) (ABTS) radical-scavenging, ferric-reducing antioxidant power (FRAP) and metal chelation of VH were comparable to those of NH. VH was purified using ultrafiltration, ion exchange and gel filtration chromatography. The purified peptides (F37) from VH, which had the highest specific antioxidant activity, consisted of four peptides containing an arginine residue at their C-termini. In addition, the ABTS radical-scavenging activity of the purified peptides (F42) at 0.148 mg/ml was comparable to that of 1 mM of butylated hydroxytoluene (BHT). These two fractions were stable over a wide pH (4-10) and temperature (25-121 °C) range. Virgibacillus sp. SK37 proteinase is a potential processing-aid for the production of a mungbean meal hydrolyzate with antioxidant properties. © 2013 Elsevier Ltd. All rights reserved.

Vanit-Anunchai S.,Suranaree University of Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

Interlocking tables are the functional specification defining the routes, on which the passage of the train is allowed. Associated with the route, the states and actions of all related signalling equipment are also specified. This paper formally models the interlocking tables using Coloured Petri Nets (CPN). The CPN model comprises two parts: Signaling Layout and Interlocking Control. The Signaling Layout part is used to simulate the passage of the train. It stores geographic information of the signalling layout in tokens. The Interlocking Control part models actions of the controller according to the functions specified in the interlocking tables. The arc inscriptions in the model represent the content of the interlocking tables. Following our modelling approach we can reuse the same CPN net structure to model any new or modified interlocking system regardless of its size. Experimental results are presented to provide increased confidence in the model correctness. © 2010 Springer-Verlag.

Widjaja J.,Suranaree University of Technology
Optics Communications | Year: 2012

A new method for noisy face recognition by incorporating wavelet filter into compression-based joint transform correlator (JTC) is proposed. The simulation results show that the proposed method has advantages over the conventional compression-based JTC in that regardless of the contrast and the noise level of the target, the wavelet filter can optimize the recognition performance to be higher than the classical JTC, provided compressed references have high contrast. © 2011 Elsevier B.V. All rights reserved.

Suginta W.,Suranaree University of Technology | Khunkaewla P.,Suranaree University of Technology | Schulte A.,Suranaree University of Technology
Chemical Reviews | Year: 2013

A chemical review discusses electrochemical biosensor applications of polysaccharides chitin and chitosan. Biosensors incorporate functional proteins, nucleic acids, cell organelles, or whole living cells, which are fixed on a physicochemical transducer surface that is able to translate specific interactions of the immobilized bioentity with its corresponding binding partner into measurable, concentration-dependent electrical signals. The quality of gentle and firm immobilization of the analyte-selective biological component is a determining factor of biosensor performance, and chitin or chitosan films have proved to be useful transducer surface modifiers, compatible with advanced sensor properties under certain circumstances. Another valuable feature of chitin or chitosan is a chemical structure that includes many intrinsic oxygen- and nitrogen-based functional groups that can serve as the starting points for covalent modification and chitosugar chain cross-linking.

Flood A.E.,Suranaree University of Technology
CrystEngComm | Year: 2010

This article analyzes a collection of recent research on a recently discovered feedback mechanism between the crystal growth rate and the surface features of the crystal, and the ramifications the mechanism has on crystallization in general and also on the design and analysis of industrial crystallizers. It has been found that growth under high supersaturations degrades the crystal surface, causing a roughening that is probably due to imperfect incorporation of growth clusters into the surface of the crystal. The effect becomes more pronounced under higher growth rate conditions, and for higher residence times under such conditions. The mechanism only occurs if the supersaturation is increased above a critical level known as the macroscopic roughening transition, although this level is typically quite low; for sucrose it has been measured as a relative supersaturation between 2.5 and 3.9% which is in the range used in many industrial crystallizations. The mechanism appears to be associated with the surface energy of the crystal, with the surface of high surface energy crystals being degraded at lower values of the supersaturation, and such crystals also have larger reductions in growth rate after the roughening has occurred. The mechanism also appears related to growth rate dispersion (GRD), since it gives a mechanism for variation in growth rates in batches of crystals, and also because GRD also appears to be more significant in species having a higher value of the surface energy. The mechanism also causes an increase in the impurity incorporation in the crystal, thus leading to reduced product crystal purities. The mechanism for the impurity incorporation is probably due to enhanced adsorption of impurity molecules due to large crystal surface areas (due to the roughening) and also larger numbers of adsorption sites. The mechanism also complicates measurement of crystal growth kinetics, and thus makes efficient design of industrial crystallization units more difficult. © The Royal Society of Chemistry.

Koonsrisuk A.,Suranaree University of Technology
Energy | Year: 2012

Sloped solar chimney system is a solar chimney power plant with a sloped collector. Practically, the sloped collector can function as a chimney, then the chimney height can be reduced and the construction cost would be reduced also. A mathematical model based on the continuity, momentum, energy, and state equations is developed for the sloped solar chimney system in this study. The flow details inside a collector are included in the model. The mathematical model was solved numerically using an iterative technique. Then, the numerical simulation was performed using the commercial CFD package. The consistency of the predictions of the mathematical model and that of the CFD package justifies the validity of the proposed mathematical model. A detailed study of the plant characteristics is done. Results show that using a near-unity ratio of the collector inlet flow area and the collector exit flow area might cause some problems. In addition, the assumption that the density differences in the collector and that in the chimney are approximately equal is investigated. The study shows that this assumption provides a large overprediction of the results. The effects of the chimney height and the collector area on the plant performance are also illustrated. © 2012 Elsevier Ltd.

In the present paper the performance of solar chimney power plants based on second law analysis is investigated for various configurations. A comparison is made between the conventional solar chimney power plant (CSCPP) and the sloped solar chimney power plant (SSCPP). The appropriate entropy generation number and second-law efficiency for solar chimney power plants are proposed in this study. Results show that there is the optimum collector size that provides the minimum entropy generation and the maximum second-law efficiency. The second-law efficiency of both systems increases with the increasing of the system height. The study reveals the influence of various effects that change pressure and temperature of the systems. It was found that SSCPP is thermodynamically better than CSCPP for some configurations. The results obtained here are expected to provide information that will assist in improving the overall efficiency of the solar chimney power plant. © 2013 Elsevier Ltd.

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