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Suan Luang, Thailand

Lertrusdachakul T.,Thai Nichi Institute of Technology
Proceedings - 2015 7th International Conference on Information Technology and Electrical Engineering: Envisioning the Trend of Computer, Information and Engineering, ICITEE 2015 | Year: 2015

In collaborative videoconferencing systems, the lack of gaze awareness between remotely located participants degrades the effectiveness of visual communication. This is because the position of camera and remotely located partners on the screen are not relative to produce the communicative gaze direction. Various elaborate researches have been proposed to solve this problem with the increase in difficulty for hardware implementation or software analysis. We have overcome these expensive alternatives by developing the image layout and camera-human positioning scheme that identify the position of camera, participants and remotely located partners on the screen relative to each other. The proposed approach allows the conversations to flow more natural as the visual attention of another person to any others can be recognized, providing a sense of more visually being together in collaborative activity. © 2015 IEEE. Source


Tamtrakarn A.,Thai Nichi Institute of Technology
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2016

This paper presents a compact architecture of portable functional electrical stimulator (FES) together with a level-shifting digital inverter. The presented architecture is composed of boost converter block with compact limiter circuit. The bi-phasic pulse generation is made from H-bridge switches with the boosted voltage from the boost converter block. The H-bridge switches are controlled by a level-shifting inverter which is composed of only four MOSFET devices with two capacitors. The clocking scheme for minimize power consumption is also a key point for reducing average power consumption in this work. The simulation results from LTSpice IV show that the presented stimulator can generate stimulating bi-phasic pulses with approximately +/-21V amplitude in voltage and constantly supply +/-19.2mA current to the load. The simulated bi-phasic pulse has pulse width of 326μs with frequency of 28.6Hz. The presented system can be operated under a single 6V supply voltage and the average power consumption is 117mW at stimulating frequency of 28.6Hz which can continuously operate under two CR2032 batteries for more than 11 hours. With this level of power consumption, the presented work is very suitable for using as a portable stimulator. © 2015 IEEE. Source


Kaewkiriya T.,Thai Nichi Institute of Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2015

One of the problems of learners is learners do not know their own skills. Especially learners who study IT field will have different aptitudes. If learners do not know their aptitude will affect themselves such as learning without a goal, and so on. The objective of this research is to design of conceptual framework for students recommendation for Information Technology skills. The concept framework consists of five modules. (1) to introduce the pattern base module which is an analysis by data mining. (2) to explain the mapping module for students. (3) to present the forecasting module which connect to the mapping module. (4) to present the web portal module. Web portal module is the User interface (UI) to connect user with system application. (5) to describe the Information Technology skills. This module consists of four parts; (1) programming skills (2) System engineering and network engineering (3) Graphic designs (4) other skills. Information Technology skills are mapped by using Multiple Intelligence theory. The process of selection pattern base, is use to compare the algorithm which is consisted of three algorithms (1) ID3 algorithm (2) J48 algorithm (3) Bayes Net algorithm. J48 algorithm is the highest percentage of prediction. Percentage of prediction for J48 algorithm is 78.267 % which base on pattern base for recommendation systems. © Springer International Publishing Switzerland 2015. Source


Benjaboonyazit T.,Thai Nichi Institute of Technology
Engineering Journal | Year: 2014

This paper presents a systematic approach to arowana gender identification problem using algorithm of inventive problem solving (ARIZ). Arowana is a beautiful and expensive fish. Many farms try to improve their efficiency in breeding arowana, but the problem is that arowana is monomorphic, which makes it difficult to distinguish male from female just from their appearance. This causes difficulties in mating and selling of arowana. Many trial-and-error methods have been used with little success. The problem of arowana gender identification cannot be solved easily with the psychological methods such as brainstorming or trial and error, it needs a more logical and well-structured method of problem solving. In this paper, ARIZ is used to systematically analyze the problem and search for possibilities to identify the gender of arowana step by step, and finally, among 32 ideas generated, some potential solutions have been evaluated and compared with the commonly used methods with satisfactory results which demonstrate the effectiveness of ARIZ as a powerful innovative problem solving tool. Source


The pipelines in the oil and gas industry must be regularly checked for possible corrosion that might cause leakage of oil and gas. Magnetic flux leakage (MFL) technique is a magnetic method of nondestructive testing that is used to detect corrosion and metal loss in steel pipelines. The MFL device travels inside a pipeline to inspect the corrosion parts with a powerful magnet which is used to magnetize the pipe wall. At areas where there is corrosion or missing metal, the magnetic field leaks from the pipe wall and will be detected by magnetic sensors placed between the poles of the magnet and data is transmitted to the outside recording device for analysis. The problem occurs when it is necessary to remove the damaged segments of the pipe and replace them with the new ones by welding them to the existing pipelines. It is found that welding rod and arc column are subjected to some kind of force that causes them to deviate from the right position.In this paper, the problem of low quality arc welding during pipeline maintenance due to residual magnetic field on the pipeline caused by MFL inspection device is systematically analyzed to find the root causes and ideal solution of which internal resources are utilized, is attained by using ARIZ (in this paper, magnetic field from welding current is selected). Computer simulation using finite element method and field test are conducted and show satisfactory result for the proposed idea. © 2014 Chulalongkorn University 1. All rights reserved. Source

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