Pathumwan Institute of Technology

www.pit.ac.th/
Bangkok, Thailand

Pathumwan Institute of Technology is a Thai public university located in Bangkok, Thailand.Established in 1932 as a technical school by a group of Thai Navy officers, the institute was upgraded to technical college in 1975. It eventually became a public university known as Pathumwan Institute of Technology in 1999.The institute has two academic units: the faculty of Engineering and the faculty of Education. Wikipedia.

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Maksuwan A.,Pathumwan Institute of Technology
Materials Science Forum | Year: 2017

In 1985, H.A. Janssen studied the structure of the forces inside a silo filled with granular materials, so-called Janssen’s Effect Method (J.E.M). This method is a unique property of confined granular materials. The pressure at the bottom saturated with an increasing filling height due to internal friction with side walls. In this research, we focus on the study of granular cohesionless materials such as sands and gravels, these forces are explained by adsorption and capillary phenomenon. Our main result shows that positive water pressures generate a mechanical effect with tendencies of removing the components of the porous medium corresponding to the mechanical buoyancy force (FB) that increases with increasing θ from calculated by Janssen's effect method. The topic in this research is once importance in study physical processes of the problem in the Geology Physics (i.e. the factor causing landslide). © 2017 Trans Tech Publications, Switzerland.


Chutipaijit S.,King Mongkut's University of Technology Thonburi | Sutjaritvorakul T.,Pathumwan Institute of Technology
Materials Today: Proceedings | Year: 2017

In recent years, the application of nanomaterials has been investigated by various studies, especially in their biological and agricultural features. This research aimed to evaluate the influence of zinc oxide (ZnO) and titanium dioxide (TiO2) nanoparticles on the quality of the plant regeneration in rice (Oryza sativa L. cv. RD49). Mature seed explants were used for callus induction and plant regeneration cultured on the medium supplemented with different concentrations of ZnO or TiO2 nanoparticles. The high percentage of the callus induction was achieved on the medium supplemented with 5 mg.L-1 ZnO nanoparticles or 20 mg.L-1 TiO2 nanoparticles when compared with control treatment (without nanoparticles). Various concentrations of TiO2 nanoparticles were also found to increase the percentage of the plant regeneration more than ZnO nanoparticles. The highest percentage of plant regeneration was observed on the medium containing the concentration of 20 mg.L-1 TiO2 nanoparticles. The in vitro rooting of regenerated shoots was hardened and successfully transplanted to the field after 30 days of transplantation. The results suggested that ZnO and TiO2 nanomaterials may have potential applications in the in vitro plant regeneration. © 2017 Elsevier Ltd. All rights reserved.


Sutjaritvorakul T.,Pathumwan Institute of Technology | Chutipaijit S.,King Mongkut's University of Technology Thonburi | Sihanonth P.,Chulalongkorn University
Materials Today: Proceedings | Year: 2017

Zinc oxide (ZnO) is an insoluble form, which often means less bioavailable to the organisms. Seven fungal isolates were isolated from zinc sulfide mineral ores (sphalerite) and obtained from Padaeng Industry in Tak province, Thailand. They were examined for the ability to solubilize and precipitate zinc oxide nanoparticles. Fungal isolates were grown on potato dextrose agar (PDA) medium supplemented with 0.5% (w/v) zinc oxide nanoparticles. Among tested fungal strains, Aspergillus Niger showed the highest efficiency for solubilizing zinc oxide nanoparticles. Biomineral crystals were observed in zinc oxide nanoparticles-containing agar medium underneath colonies of Aspergillus Niger. Scanning electron microscope (SEM) equipped with energy dispersive X-ray spectrometer (EDS) and X-ray powder diffraction (XRPD) studies revealed that the biomineral crystals are zinc oxalate hydrate (C2O2Zn•2H2O). It would be suggested that this fungal strain has potential biotechnological application in agricultural practice and heavy metal bioremediation. © 2017 Elsevier Ltd. All rights reserved.


Maksuwan A.,Pathumwan Institute of Technology
AIP Conference Proceedings | Year: 2016

For undergraduate students who study physics, engineering or science. One important elementary example of the basic properties of waves is studies the oscillation of the mechanics of the wave. In physics, wave is an oscillation accompanied by a transfer of energy that travels through space or mass. In this research, we will focus on the oscillation of the mechanics of longitudinal waves which, oscillation is parallel to the direction of energy propagation. The mechanical of longitudinal waves propagate via molecules of medium colliding with their neighbours. When molecules of medium collide, they bounce away from each other (a restoring force). This keeps the molecules of medium from continuing to travel in the direction of the wave. The purpose of this research is developing a formalism based on the actual physical process of mechanical of longitudinal waves. By using technique of discrete element method (DEM). DEM is very closely related to molecular dynamics. This numerical method is computing the motion and effect of interaction between particles. Our main result shows that the consistency to the actual physical process in general explanation of mechanical of longitudinal wave. © 2016 Author(s).


Chantngarm P.,Pathumwan Institute of Technology
Journal of Superconductivity and Novel Magnetism | Year: 2011

We investigate the spin-valley current in a strain-engineered graphene magnetic system, normal region (N)/strain region(S)/ferromagnetic region (F)/normal region (N) junction. Locally strained region S leads to valley-dependent current, and ferromagnetic region F leads to the spin-dependent current. We find that pure valley current can be created easily by applying the real-vector potential that is equal to the pseudo-vector potential caused by strains in the S-region. In this work, we focus on the spin current in each valley when exchange field is applied in the F-region, and find that the linear control of spin-valley polarization by gate potential is possible. It is also found that when the current is carried only by the carriers in one valley (pure valley current), pure spin-up current can be linearly altered to pure spin-down current by tuning the gate potential, in the case of very large-F-thickness junction. Our work is applicable for devising controllable spin-valley-current electronics circuits. © 2011 Springer Science+Business Media, LLC.


Mueanploy W.,Pathumwan Institute of Technology
Journal of Physics: Conference Series | Year: 2015

The objective of this research was to offer the way to improve engineering students in Physics topic of vector product. The sampling of this research was the engineering students at Pathumwan Institute of Technology during the first semester of academic year 2013. 1) Select 120 students by random sampling are asked to fill in a satisfaction questionnaire scale, to select size of three dimensions vector card in order to apply in the classroom. 2) Select 60 students by random sampling to do achievement test and take the test to be used in the classroom. The methods used in analysis of achievement test by the Kuder-Richardson Method (KR- 20). The results show that 12 items of achievement test are appropriate to be applied in the classroom. The achievement test gets Difficulty (P) = 0.40-0.67, Discrimination = 0.33-0.73 and Reliability (r) = 0.70.The experimental in the classroom. 3) Select 60 students by random sampling divide into two groups; group one (the controlled group) with 30 students was chosen to study in the vector product lesson by the regular teaching method. Group two (the experimental group) with 30 students was chosen to learn the vector product lesson with three dimensions vector card. 4) Analyzed data between the controlled group and the experimental group, the result showed that experimental group got higher achievement test than the controlled group significant at .01 level. © Published under licence by IOP Publishing Ltd.


Mueanploy W.,Pathumwan Institute of Technology
Journal of Physics: Conference Series | Year: 2016

This study is the case study of Physic II Course for students of Pathumwan Institute of Technology. The purpose of this study is: 1) to develop cooperative learning method of peer assisted learning (PAL), 2) to compare the learning achievement before and after studied magnetic field lesson by cooperative learning method of peer assisted learning. The population was engineering students of Pathumwan Institute of Technology (PIT's students) who registered Physic II Course during year 2014. The sample used in this study was selected from the 72 students who passed in Physic I Course. The control groups learning magnetic fields by Traditional Method (TM) and experimental groups learning magnetic field by method of peers assisted learning. The students do pretest before the lesson and do post-test after the lesson by 20 items achievement tests of magnetic field. The post-test higher than pretest achievement significantly at 0.01 level.


Maksuwan A.,Pathumwan Institute of Technology
Key Engineering Materials | Year: 2016

In general explanation for propagation of electromagnetic wave at a plane between two media of different dielectric properties. The description of this phenomenon be based on the actual physical process of the well know interpretation of the classical rays with the polarization vectors. In this research, we investigate this situation by using the knowledge of the amplitude of emission and absorption of massless spin-1 particle (photon) excitation by the emitter and detector, respectively. By using time evolution process based on vacuum-to-vacuum transition amplitude in quantum (field) theory QED formalism. This process shows that the propagation of photon excitation by the external sources is given with an explanation of the amplitude of propagation between different spacetime points from an emitter to a detector, which exclude with the Feynman propagator. The purpose of this research is developing a formalism based on the actual physical process of photons propagate from an emitter to a detector. It shows the consistency to the actual physical process of interpretation of the polarization vectors in the classical rays. © 2016 Trans Tech Publications, Switzerland.


Wutthithanyawat C.,Pathumwan Institute of Technology | Srisiriwat N.,Pathumwan Institute of Technology
Applied Mechanics and Materials | Year: 2013

As increasing hydrogen demand for fuel cell application is expected in the near future, the efficient production of hydrogen is vital enabling technology for commercialization of fuel cell for residences and automobiles. Among different technologies of hydrogen production, autothermal reforming is considered to be thermally self-sustaining that the external heat source is not required. In this work, a steady state modeling of autothermal reforming of ethanol for hydrogen production has been performed. Because the operating condition at adiabatic temperature is designed for autothermal reformer, the estimated function of adiabatic temperature as function of steam-tocarbon (S:C) and air-to-carbon (A:C) molar ratios can be determined. At autothermal condition, the effect of S:C and A:C ratios on the product distributions of hydrogen rich stream is thermodynamically investigated. At fixed reactor pressure of 1 bar and preheat temperature of 200 °C, the favorable operating condition for the autothermal reforming of ethanol is found to be a S:C ratio of 2.0 and an A:C ratio of 1.75 at adiabatic temperature of 639 °C. © (2013) Trans Tech Publications, Switzerland.


Wutthithanyawat C.,Pathumwan Institute of Technology | Srisiriwat N.,Pathumwan Institute of Technology
Applied Mechanics and Materials | Year: 2014

Autothermal reforming (ATR), which is the combination of endothermic steam reforming and exothermic partial oxidation, is an attractive process to produce hydrogen using for transportation fuel cell because of its moderate size. ATR is considered to be thermally self-sustaining that the external heat source is not required. In order to keep the adiabatic temperature of ATR reactor, the process control strategy needs in understanding the dynamic characteristics of the ATR system. Thus, the modeling and simulation of ATR process for hydrogen production fueled by ethanol is carried out in this work. The open loop responses of the feed and ATR temperatures are simulated by the dynamic models of ATR system. The simulation results showed the predominantly influence of the electrical power of preheater on the feed and ATR temperatures while the air flowrate has an inverse effect on the feed temperature and a direct effect on the ATR temperature. As a result, the match of control loop is very sensible for an effective control strategy in the development of control system design for maintaining the adiabatic temperature of ATR reactor for sustaining the effectiveness of hydrogen production. © (2014) Trans Tech Publications, Switzerland.

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