Nakhon Phanom, Thailand

Nakhon Phanom University

www.npu.ac.th
Nakhon Phanom, Thailand

Nakhon Phanom University was established in 2005 by combining the existing tertiary schools of Nakhon Phanom Province: Nakhon Phanom Rajabhat University, Nakhonphanom Technical College, Nakhonphanom College of Agriculture and Technology, Thatphanom Community Education College, Nawa Community Education College, and Boromarjonani College of Nursing, Nakhon Phanom.The university is multi-campus, with the Office of the President at 103 Moo 3 Chayangkol Road, Tambol Khamtao, A.Muang, Nakhon Phanom.Nakhon Phanom University is different from other new universities in that it continues the existing functions of the combined institutions. It provides academic training at the vocational, higher vocational, undergraduate and graduate levels. The faculties, colleges, and institutes are: the Faculty of Management science and Information Technology the Faculty of Liberal Arts and science the Faculty of Industrial Technology the Faculty of Agriculture and Technology Nawa College Thatphanom College Boromarjonani College of Nursing, Nakhon Phanom the Tourism and Service Industry College the International Aviation College the Research and Development Institute the Academic Resources Center the Language Institute Srisongkram Industrial and Technology College the GMS Studies Center Wikipedia.


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Phatungthane T.,Nakhon Phanom University | Samran B.,Nakhon Phanom University | Rujijanagul G.,Chiang Mai University
Key Engineering Materials | Year: 2017

In the present work, the molten-salt method was applied to synthesize 0.948K0.5Na0.5NbO3-0.052LiSbO3 powder. The powder properties after processing were investigated. Based on X-ray diffraction technique, pure perovskite phase was observed at a calcination temperature of 700°C which is lower than that required by the conventional solid-state reaction technique for ∼200°C. The XRD analysis showed that the powder had an orthorhombic symmetry which consistent with the Raman spectroscopy results. The powder exhibited very fine grain with narrow size distribution. Particle size of the obtained powders increased with increasing calcination temperature. Therefore, the molten-salt method is a simple and effective method to synthesize 0.948K0.5Na0.5NbO3 - 0.052LiSbO3 powder. © 2017 Trans Tech Publications.


Ongkittikul S.,Mahanakorn University of Technology | Jundang N.,Mahanakorn University of Technology | Srisuk S.,Nakhon Phanom University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2017

This paper presents a new data compilation of the image transformation base on the series of the trace transform. The advantage of this new compilation is to solve the noise problem that usually appears in the pattern recognition. Submicro pattern analysis is employ to encode the series of the trace transform from a image which organizes by the shift-invariant sub-micro pattern scheme (SiSMP). Then, all data will sum to the final result by 2-D histogram with the Discriminant Feature Transform. The experiments of our approach show that the new compilation can increase the performance of the recognition compare with the LBP technique by using Brodatz texture database. © 2017 SPIE.


Prasongkit J.,Nakhon Phanom University | Rocha A.R.,São Paulo State University
RSC Advances | Year: 2016

Based on density functional theory and non-equilibrium Green's function method, we investigate the transport properties of four different gases (NO, NO2, NH3, and CO) adsorbed on biphenyl dithiol molecules coupled to gold leads. Since the transmission function is strongly affected by quantum interference, namely antiresonance and Fano resonances, significant changes in conductance caused by the adsorption of molecular gases are archived. Our findings suggest that biphenyl dithiol exhibits strong sensitivity for NO and NO2 which results from their interference features being close to the Fermi energy of the gold leads and dominate the transport of the system. Moreover, the quantum interference effects also result in enhanced and suppressed conductance, which enable us to significantly improve the selectivity. In particular, a distinction between NO, NO2 and NH3 gases based on the biphenyl dithiol appears possible. © 2016 The Royal Society of Chemistry.


Prasongkit J.,Nakhon Phanom University | Prasongkit J.,Uppsala University | Grigoriev A.,Uppsala University | Ahuja R.,Uppsala University
Physical Review B - Condensed Matter and Materials Physics | Year: 2013

Well-known conductive molecular wires, such as cumulene or polyyne, provide a model for interconnecting molecular electronics circuits. In recent experiments, the appearance of carbon wire bridging between two-dimensional electrodes, i.e., graphene sheets, was observed, thus demonstrating a mechanical way of producing cumulene. In this work, we studied the structure and conductance of carbon wire suspended between carbon nanotubes (CNTs) of different chiralities (zigzag and armchair), and corresponding conductance variation upon stretching. We found that the geometric structure of the carbon wire bridging CNTs was similar to the experimentally observed structures in carbon wire obtained between graphene electrodes. We show a way to modulate conductance by changing bridging sites between carbon wire and CNTs without breaking the wire. Observed current modulation via cumulene wire stretching or elongation together with CNT junction stability makes this a promising candidate for use in mechano-switching devices for molecular nanoelectronics. © 2013 American Physical Society.


Prasongkit J.,Nakhon Phanom University | Prasongkit J.,Uppsala University | Grigoriev A.,Uppsala University | Pathak B.,Uppsala University | And 4 more authors.
Journal of Physical Chemistry C | Year: 2013

Graphene nanogaps and nanopores show potential for the purpose of electrical DNA sequencing, in particular because single-base resolution appears to be readily achievable. Here, we evaluated from first principles the advantages of a nanogap setup with functionalized graphene edges. To this end, we employed density functional theory and the non-equilibrium Green's function method to investigate the transverse conductance properties of the four nucleotides occurring in DNA when located between opposing functionalized graphene electrodes. In particular, we determined the electrical tunneling current variation as a function of the applied bias and analyzed the associated differential conductance at a voltage which appears suitable to distinguish between the four nucleotides. Intriguingly, we predict for one of the nucleotides (deoxyguanosine monophosphate) a negative differential resistance effect. © 2013 American Chemical Society.


Amnadnua K.,Nakhon Phanom University | Tangchirapat W.,King Mongkut's University of Technology Thonburi | Jaturapitakkul C.,King Mongkut's University of Technology Thonburi
Materials and Design | Year: 2013

This study evaluates the mixture of ground calcium carbide residue (GCR) and ground fly ash (GFA) for use as a new cementing material to produce high strength concrete. Ordinary Portland cement was used as an activator to promote the reaction between GCR and GFA. Compressive strength, modulus of elasticity, heat evolution, and durability in term of water permeability of concrete were investigated and compared with concrete made from ordinary Portland cement (OPC concrete). The results showed that GCR-GFA mixture, despite containing no Portland cement, had a high potential to be used as a new cementing material for producing high strength concrete having a compressive strength that exceeds 50MPa. Furthermore, the compressive strength of GCR-GFA concrete containing 20% Portland cement (used Portland cement of 110kg/m3) could be as high as 67MPa or 95% of OPC concrete at 28days and increased up to 73MPa at 90days or 90% of OPC concrete (used Portland cement of 550kg/m3). The GCR-GFA concretes with and without Portland cement had moduli of elasticity similar to OPC concrete i.e., they increased with the compressive strength. In addition, water permeability of high strength concrete made from GCR-GFA mixture was equal to or slightly lower than OPC concrete. Finally, concrete made from GCR-GFA mixture had much lower heat evolution than OPC concrete. © 2013 Elsevier Ltd.


Kasikranan S.,Nakhon Phanom University
Pakistan Journal of Biological Sciences | Year: 2011

This study aimed to search for the best indicator to be used for the harvest of maize pods for baby corn production. A Randomized Complete Block Design (RCBD) with four replications was used. The treatments are: T 1(Control) Taking sample when silks of female flower had extended from tip of pod up to 3 cm long T 2, silks had extended 1 cm long T 3, silks had extended 2 cm long T 4, blooming of female flower for 2 days T 5, blooming of female flowers for 4 days T 6, blooming of female flower for 6 days T 7, one third blooming of male flower T 8, two third blooming of male flower and T 9, full bloom of male flower. Five baby corn Characteristics were used i.e., (1) fresh weight of whole ears, (2) fresh weight of ears without husk, (3) commercial standard ears, (4) off standard ears and (5) disordered kernel-rows of ears. A range of scores from 1 to 9 was applied to judge quality and yield in each item of the five baby corn characteristics. A score of 1 = the best whilst further increases in scores indicated the decline in quality of baby corn. The results showed that an indicator for use in harvesting pods of maize for baby corn production was found with T 6, i.e. the best time for the harvest of pods is when the female flowers had bloomed for 6 days after the appearance of silks. © 2011 Asian Network for Scientific Information.


Srisuk S.,Nakhon Phanom University
2014 International Electrical Engineering Congress, iEECON 2014 | Year: 2014

In this paper, we give a review on Bilateral filtering as a tool for image smoothing with edge preserving properties. Bilateral filtering is a combination of domain and range filtering. Domain filtering measures the geometric closeness between the neighborhood center and nearby points. Therefore, domain filtering acts as a gaussian filtering. In range filtering, the similarity between two pixels are measured in which similar pixel values are weighted as a high influence while discarding dissimilar ones. We give a review on traditional bilateral filtering. We also describe a modified bilateral filtering based on fuzzy membership function, the fuzzy bilateral filtering. In fuzzy bilateral filtering, the skin is smoothed while maintaining the edges and non skin area, therefore, a more beautiful face image can be achieved. We will demonstrate some of its applications especially on skin smoothing. © 2014 IEEE.


Potai R.,Naresuan University | Potai R.,Nakhon Phanom University | Traiphol R.,Naresuan University | Traiphol R.,Mahidol University
Synthetic Metals | Year: 2015

In this study, we demonstrate an ability to control the photophysical properties of nanoparticles of regioregular poly(3-octylthiophene) (rr-P3OT) by utilizing solvent-nonsolvent system. The strength of local polymer-solvent interactions is controlled by using hexane or hexanol as a poor solvent. We have found that the assembling of rr-P3OT chains in mixtures of toluene and these poor solvents results in the formation of nanoparticles with average diameter of about 35 nm. Interestingly, the use of hexane or hexanol as a poor solvent causes drastic variation of photophysical properties of the resultant nanoparticles. Their absorption spectra show quite different patterns. In addition, the photoluminescent (PL) peaks are detected at 565 nm and 645 nm in the systems of toluene/hexane and toluene/hexanol, respectively. Photoemission quantum efficiency of the nanoparticles also depends significantly on type of the poor solvents. We further demonstrate that the photophysical properties can be systematically controlled by using a series of linear alcohols as poor solvents. The increase of alcohol chain length causes the decrease of its polarity, which in turn improves the polymer-solvent interactions. In the system of toluene/decanol, PL spectrum of the nanoparticles covers relatively broad energy region, ranging from about 540 to 770 nm. Our study provides a simple method for preparation of rr-P3OT nanoparticles with controllable photophysical properties. © 2015 Elsevier B.V. All rights reserved.


Chooruang K.,Nakhon Phanom University | Aziz M.M.,University of Exeter
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2015

In this paper, magnetization transition width and shape were calculated by Wiener deconvolution on the measured replay waveform. It was found that the signal-to-noise ratio of replay waveform above 40dB, the error of computed magnetization transition was less than 1%. It can be observed that the magnetization transition from the experimental measurement is close to the tanh function and the transition width parameter was found to be as same as the result from using the replay signal fitted with magnetization function. © 2014 IEEE.

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