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Boonyopakorn J.,Rajamangala University of Technology at Suvarnabhumi
IMSCI 2016 - 10th International Multi-Conference on Society, Cybernetics and Informatics, Proceedings | Year: 2016

Global advanced technology era is the most significant role for world population using Online Social Network (OSN) increasingly. It can be applied to multi-functioning purposes which are more essential for their life any situations for instance their society, study, and work. The integration of technology and English practicing skills has a lot good benefits for them to promote English communication among EFL learners. They are motivated and encouraged to practice their English skills more fluently and effectively. They also have good attitudes towards using the technology in their learning. Most of them are able to communicate in English with each other around the world. They also learn more culture and lifestyles in any foreign countries, especially in ASEAN countries. Thailand is one of the members in ASEAN Community that Thais need to communicate in English as a working language. They have to use English for their study and work in Thailand and other countries. It's very necessary to help them communicating in English direct oral conversations related to real work life with these foreigners rapidly. This article describes that Technology Enhanced Language Learning (TELL) impacts EFL Learners as social media to improve their English communication. Internet acts as an efficient tool to enhance language acquisition in English learning. Most of them use a lot of applications via smart phones for their English lifelong learning anywhere anytime. TELL assists them to practice more English communication skills which are important for their study and work life. They enable to learn all English such as vocabulary, grammar, expression, conversation, message, etc. They also develop their English communication skills; listening, speaking, reading, and writing any situations. They will be able to communicate with Asians in English for further work in ASEAN Community effectively. They will cooperate to do business for ASEAN Economic Community (AEC) in the future successfully.

Ploywattanawong L.,Rajamangala University of Technology at Suvarnabhumi
ACM International Conference Proceeding Series | Year: 2017

We study the behaviors and the problem in changing the project topic during the last four years. We use primary sources to develop the concept and the decision support system. This research proposed the concept of making decision. The concept is used to apply to the problem when the students choose the final project. The process of the system is taken from regular project defense process to develop tree-like decision theory that will be the supporting model in P-DSS model. The P-DSS system analyzes the student's information on choosing the project in Information Technology and matches the skills, practices, and the curriculum regulations. © 2017 ACM.

Buranasaksee U.,Rajamangala University of Technology at Suvarnabhumi
ACM International Conference Proceeding Series | Year: 2017

Many automatic assessment (AA) tools have been developed and used to help the instructors grading the students. In computer science field, those AA tools are mainly focus on computer programming language course. However, with the development of the compiler and integrated development environment, the students can learn and practice programming while getting informative feedback without an AA tool. However, in the course that requires interaction with the operating system, the exercises can involve many programs and steps. Manually checking the student's machine takes a long time for the instructor. Furthermore, there is no AA tool that was designed specifically for grading this kind of exercise. In this paper, the framework for Linux-based operating system exercises called LINSIM is proposed. LINSIM obtains the state of the operating system in the student's machine and verifies if the system has been configured according to the exercise. The framework provides an abstraction between the LINSIM script and the Linux commands so that the instructor need not write custom commands. Finally, the prototype that implements the framework was developed and used in the classroom. As a result, the instructor can immediately provide the feedback on the exercise to the student. © 2017 ACM.

Phumcharoen J.,Rajamangala University of Technology at Suvarnabhumi
ACM International Conference Proceeding Series | Year: 2017

This paper presents the development of database management of Thailand Qualification Framework (M-TQF). The main objectives of the system are the educational quality assurance, reduced redundancy, verified submission, and document management of Thailand Qualification Framework (TQF). Then the satisfaction of the users to the system is evaluated. We analyzed the working process, designed, and evaluated the system in our previous work. In this paper, we continuously develop the system structure, ER diagram, the user interface, write the code and survey satisfaction of the user to the system. The study shows that the average of satisfaction is at the excellent level (4.26). Therefore, the result indicates that the system can support the document management of TQF in Rajamangala University of Technology Suvarnabhumi (RUS), support the educational quality assurance, solve the problem of the document management of TQF, and appropriately develop the Information Technology curriculum. © 2017 ACM.

Chaithongsuk S.,Rajamangala University of Technology at Suvarnabhumi | Nahid-Mobarakeh B.,University of Lorraine | Caron J.-P.,University of Lorraine | Takorabet N.,University of Lorraine | Meibody-Tabar F.,University of Lorraine
IEEE Transactions on Industrial Electronics | Year: 2012

Two motors are studied and optimized for transportation applications. The objective is to design motors whose external model is well suited for conventional vector control. Hence, in the design procedure, the emphasis is on the backelectromotive force (EMF) waveforms and external parameters. The first topology is a surface-mounted (nonsalient pole) motor with segmented magnets reducing significantly selected harmonics. The second is an inset magnet type (salient pole) motor with surface poles particularly shaped to reduce the harmonic content of the air gap flux density. For both motors, the principle of pulse width modulation is used for the harmonic reduction in the design process. The interest of these motors lies in the sinusoidal waveform of their back EMF allowing a simple vector control even at field-weakening region for high speeds. © 2011 IEEE.

Udomhunsakul S.,Rajamangala University of Technology at Suvarnabhumi
International Journal of Circuits, Systems and Signal Processing | Year: 2013

Noise reduction is one of the most essential processes for image processing. The goal of the noise reduction is how to remove noise while keeping the important image features as much as possible. In this paper, a novel method to remove additive noise from digital image, based on the combination of Gaussian filter and the singular value decomposition, is proposed. Firstly, Gaussian filter is used to classify noisy image into two parts, which are its blur and noisy edge images. Next, the noise on noisy edge image, obtained from the difference between the original noisy image and its blur image, is reduced by using an adaptive block-based singular value decomposition filtering (BSVD). Finally, the reconstruction images are obtained from combining between noisy edge image, filtered by an adaptive BSVD filtering, and its original blur image. From the experiments, the objective and subjective measurements prove that the proposed approach compared with traditionally methods can suppress noise, preserve the significant image features as well as effectively smooth in the homogeneous area. Therefore, the proposed method leads to a practical method to be used for noise reduction.

Worrakitpoonpon T.,Rajamangala University of Technology at Suvarnabhumi
Monthly Notices of the Royal Astronomical Society | Year: 2014

We study, using N-body simulation, the shape evolution in gravitational collapse of cold uniform spherical system. The central interest is on howthe deviation from spherical symmetry depends on particle number N. By revisit of the spherical collapse model, we hypothesize that the departure from spherical symmetry is regulated by the finite-N density fluctuation. Following this assumption, the estimate of the flattening of relaxed structures is derived to be N-1/3. In numerical part, we find that the virialized states can be characterized by the core-halo structures and the flattenings of the cores fit reasonably well with the prediction. Moreover, the results from large N systems suggest the divergence of relaxation time to the final shapes with N.We also find that the intrinsic shapes of the cores are considerably diverse as they vary from nearly spherical, prolate, oblate or completely triaxial in each realization. When N increases, this variation is suppressed as the final shapes do not differ much from initial symmetry. In addition, we observe the stable rotation of the virialized states. Further investigation reveals that the origin of this rotation is related in some way to the initial density fluctuation. © 2014 The Authors.

Archevapanich T.,Rajamangala University of Technology at Suvarnabhumi
ICCAS 2010 - International Conference on Control, Automation and Systems | Year: 2010

The conventional CPW fed rectangular slot antenna create dual narrow band. The single wideband antenna can obtain by using tuning stub. This paper describes a modified tuning stub of CPW fed rectangular slot antenna to achieve single wide bandwidth. The prototype of tuning stub is designed with several parameters, the significant modified by cutting on vertical narrow strips of tuning stub to achieve four different geometries. The comparison on the simulated return loss shows the bandwidth, the widest bandwidth with good matching is choosing. The wide slot antenna fed by coplanar waveguide (CPW) with tuning stub is designed on low cost substrate FR4 to achieve single wide bandwidth coverage standard of WLAN IEEE 802.11b/g/j/a/n (2.4 -2.4835 GHz, 4.9-5.1 GHz, 5.15-5.35 GHz, 5.7-5.9 GHz) and WiMAX (3.5 GHz) from frequency range 2.29-6.94 GHz. ©ICROS.

Unahalekhaka P.,Rajamangala University of Technology at Suvarnabhumi
Energy Procedia | Year: 2014

This paper describes simplified modeling of metal oxide surge arrester (MOSA) to operate analysis. This model is a new model proposed (P-K Model) to verify the accuracy in order to compare with IEEE and Pinceti Model. The simulations are performed with the Alternative Transients Program version of Electromagnetic Transient Program (ATP-EMTP). In the present paper, the MOSA models were verified for several medium voltages which consist of 18 kV and 21 kV, which 18 kV arrester was used in 22 kV system of Provincical Electricity Authority (PEA) and 21 kV arrester was used in 24 kV system of Metropolitan Electricity Authority (MEA) in Thailand. The P-K model was evaluate from different manufacturing, it is based on the General Electric (GE), Siemens and Ohio Brass as well as IEEE and Pinceti Model. The tests are performed by applying a fast front current surge with front time of up to 0.5μs and the standard impulse current surge (8/20μs). The results were compared between three models in order to calculate the error operation of the MOSA in the ATP-EMTP Program. The relative error of arrester models show that the P-K model can be used to simulate and calculate in ATP-EMTP program as well as IEEE and Pinceti model. In the case of fast front current surge, the P-K model has a maximum error of 5.39% (Ohio Brass, 10 kA, 21 kV) and has a minimum error of 0.24% (GE, 10 kA, 18 kV). Also, the standard impulse current surge, P-K model has a maximum error of 2% (Ohio Brass, 10 kA, 18 kV) and has a minimum error of 0.32% (Siemens, 10 kA, 21 kV) in the voltage response. © 2014 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

Phumcharoen J.,Rajamangala University of Technology at Suvarnabhumi
2016 6th International Workshop on Computer Science and Engineering, WCSE 2016 | Year: 2016

Thailand Quality Framework (TQF) is mainly the framework that is used to regulate all the higher educations in Thailand. The framework provides basic requirements for all curriculums in higher education in Thailand. Therefore, all the curriculums taught in Thailand must comply with the framework. When the initial version of the framework was introduced to the universities, the framework was completed to deploy to each curriculum, as there are many documents to involve in the process. Therefore, in order to improve the quality assurance of the framework to the faculties, this paper proposed the development of the Management TQF database system (M-TQF). In this work, all of the satisfaction of the actors that interacts with the framework including the lecturer, staff of the Faculty of Science and Technology in the Rajamangala University of Technology Suvarnabhumi were collected. Then the sample was purposively selected from Computer Science and Information Technology programs and analyzed. Finally, based on the information analyzed, the database of the TQF in the Faculty of Science and Technology was proposed to improve the deployment of the new curriculum in the field of Information Technology.

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