Tangtisanon, Pikulkaew

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Tangtisanon, Pikulkaew
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Tangtisanon, P.
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pikulkaew.ta@kmitl.ac.th

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    Capactive double layers uniformly distributed RC line and its applications to active filters
    (2000-12-01)
    Janchitrapongvej, V.
    ;
    Kawejan, K.
    ;
    Seatia, S.
    ;
    Benjangkaprasert, C.
    ;
    Tangtisanon, P.
    A technique for active low pass filter designed by using double layers capacitive uniformly distributed RC line (DURC) is presented. The proposed circuit configuration consists of two DURC and a single gain amplifier. Herein, α and K parameters of the circuit are used to improve the magnitude response. The structure reduces an amount of circuit complexity and simple to use for filter applications. The simulation by P-SPICE of the amplitude response and sensitivities are also given.
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    Real time human emotion monitoring based on bio-signals
    (2018-12-10)
    Tangtisanon, Pikulkaew
    Nowadays, medical technologies are rapidly improved leading to an increasing of life expectancy that caused ageing society problems. The most vital issue for elders is a health problem in both physical and mental aspect. This paper focuses on emotional monitoring and warning system using human Bio-signals in real time. The signals come from galvanic skin response and heart rate sensor that attached with a wristband wearing by the elders. The two signals are sent to a server as inputs, calculated using Fuzzy set variable model then return emotion and health status of the elder as outputs stored in the server. The proposed system is run based on ubiquitous computing so caretakers can monitor for the elder’s emotion in real time anywhere, any time. Moreover, the caretakers also get automatically alerts from the system in a case that the system returns an irregular health status of the elders. Experimental results show that the proposed system was run with a high accuracy rate.
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    The design of an active band pass filter using uniformly distributed RC line
    (2002-01-01)
    Phantonglow, R.
    ;
    Janchitrapongvej, K.
    ;
    Tangtisanon, P.
    This paper describes the realization of an active band pass filter circuit using a uniformly distributed RC line (URC). The proposed circuit structures resemble the Renz's band pass filter circuit, which consist of three URCs and a single positive gain amplifier. From the experimental results by Matlab and Pspice programs, it is showed that the behavior of the proposed band pass filter circuit gives a good narrow band and low sensitivity, better than Renz's band pass filter circuit.
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    Android-based surveillance car
    (2015-01-26)
    Tangtisanon, Pikulkaew
    Nowadays, mobile phone technologies have been developed in many aspects both software and hardware. In this era, a mobile phone contains many smart functions that perform with higher speed but lower price than before. A smart phone attracts people and almost everyone already possess. This paper illustrates a method to build a surveillance car that is controlled by a smart phone with an android operating system. The advantage of the surveillance car over the surveillance camera is that the car can move around the area freely, so a user can get any point of view in video format from a camera that is attached to the car. Moreover, with temperature sensor, the user can monitor and prevent a house fire. In the present study, the system was composed of two smart phones. The first one held by a user received video content from the second one attached to the car. The user could control the direction of the car by sliding fingers on a touch screen or tilting a smart phone. At this stage, the signal was sent to the second one which passed it to the microcontroller board controlling the movement of the car.
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    Android-based gardening robot with fuzzy variable set model
    (2017-11-03)
    Tangtisanon, Pikulkaew
    The aim of this paper is to build android-based gardening robot that can be controlled by Android-based smartphone via long distance. Moreover, the robot can be used to check humidity of the soil and sending the information to a cloud server. The information from the server will be used in the fuzzy algorithm to determine plan of the planting for the user. In the present study, two Android based smartphone are required. One smartphone was attached to the robot and acted as a robot's eyes and brain. Another was held by the user to monitor a video content sending from the robot's eyes. The user can control a movement of the robot by sliding fingers on a touch screen or tilting the smartphone. If he sees weeds along the way, he can send the command to the robot to immediately cut it. Furthermore, the user also can ask the robot to measure a soil humidity and view the result online in real-time.
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    The design of an active band pass filter using uniformly distributed RC line
    (2003-07-14)
    Tangtisanon, P.
    ;
    Khempila, A.
    ;
    Panyanouvong, N.
    ;
    Saetia, S.
    ;
    Janchitrapongvej, K.
    This paper describes the realization of an active band pass filters using uniformly distributed RC line (URC). We proposed two circuits, the first proposed circuit consists of three URC and a single positive gain amplifier. The second proposed circuit consists of two double capacitive layers uniformly distributed RC line (herein after called DURC) and a single negative gain amplifier. From the experimental results by Pspice program, it is shown that the behavior of the two proposed band pass filter give good narrow band width, high Q and low sensitivity than does Renz's band pass filter.
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    Automatic labeling for thai news articles based on vector representation of documents
    (2018-08-13)
    Jirasirilerd, Wiphada
    ;
    Tangtisanon, Pikulkaew
    Nowadays, the most powerful news source in the world comes from online media on the Internet. The information comes from the SNS, video clips, audio clips or various news websites. In this competitive world, many news websites are mainly focused on publishing their contents to the website as fast as they can without taking time to label them correctly. This leads to a problem where readers cannot find news that they are interested in from a large amount of information on the website. In this paper, we propose a method to automatically label articles on the Thai language website using distributed representation of documents. The semantic similar words are extracted from paragraph vectors of each category of news and assign them as labels. We apply the convolutional neural network with binary classification approach to separate words from sentences and the result of the experiments indicated that our method can be applied to automatically label Thai news article effectively.
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    CAC with the modified call request delaying method in IP networks
    (2006-12-01)
    Ongpaibool, K.
    ;
    Konkaew, N.
    ;
    Lertwatechakul, M.
    ;
    Tangtisanon, P.
    ;
    Suwansawat, K.
    In tliis paper, we propose an improving method for CAC (call admission control) process that could reduce call blocking rate in QoS network, especially in the saturated situation. We modified the proposed CRDM [12] by estimating the call request holding time for an expected new released bandwidth from the traffic descriptor of present active connections. The method performance is shown as simulation results in term of call blocking rate and network utilization ratio which compared among modified CRDM, original CRDM and the traditional CAC on IntServ over DiffServ framework. © 2006 ICASE.
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    On-line writer recognition for Thai numeral
    (2002-01-01)
    Thumwarin, P.
    ;
    Tangtisanon, P.
    ;
    Murata, S.
    ;
    Matsuura, T.
    This paper discusses an on-line writer recognition for Thai numerals. First, a center point of a Thai numeral is determined after normalization. Then the center point is shifted to an origin. Secondly, the distance from the origin to the pen-point position in the handwriting process is measured and the area of a triangle determined from the origin and the two adjacent points of the pen-point position is calculated. Thirdly, the features of pen-point movement in the process are extracted by expanding the time sequence of the above distance and area into Fourier series. Then the features of pen-point movement are represented in terms of Fourier coefficients. Fourthly, in order to describe the handwriting process features, the FIR system with the above coefficients as input and output of the system is introduced. Then the impulse response of the FIR system is used as the feature of handwriting process. Furthermore in order to recognize the writer, K-L expansion (J.T. Tou and R.C. Gonzalez "Pattern Recognition Principles", Addison-Wesley, pp. 269, 1974) of the obtained impulse response is used. In the experiments, the average rates of type I (false rejection) and type II (false acceptance) error were 17.14% and 9.26%, respectively.