{"title":"Single-Phase, Single-Loop PLL-Based BPSK, QPSK, 8-PSK Demodulators","authors":"Chutpipat Chaichomnan, P. Khumsat, A. Worapishet","doi":"10.1109/ecti-con51831.2021.9454858","DOIUrl":"https://doi.org/10.1109/ecti-con51831.2021.9454858","url":null,"abstract":"A general single-phase/single-loop PLL-based m-PSK demodulator is described. The demodulator employs a rising-edge RS flip-flop as a phase detector because of its linear / over a 0-2π phase difference. This flip-flop characteristic helps simplify the phase controller design and make it truly modular. The phase controller basically explores a sub-ranging/re-scaling technique similar found in a typical ADC converter. The proposed principle has been implemented with discrete components around 74HCT4046 for demodulating BPSK, QPSK and 8-PSK signals. The modulator prototypes operate under a single supply of 5V achieving a maximum data rate of 40kbps at a carrier frequency around 120-kHz. Experimental comparison with a widely-used Costas-Loop BPSK demodulator suggests that the proposed structure offers a competitive performance.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121040006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pattareeya Piravechsakul, T. Kasetkasem, S. Marukatat, I. Kumazawa
{"title":"Combining Technical Indicators and Deep Learning by using LSTM Stock Price Predictor","authors":"Pattareeya Piravechsakul, T. Kasetkasem, S. Marukatat, I. Kumazawa","doi":"10.1109/ecti-con51831.2021.9454877","DOIUrl":"https://doi.org/10.1109/ecti-con51831.2021.9454877","url":null,"abstract":"A stock market price prediction is one of the most challenging tasks. There are many effected factors to make the stock market price go up or down such as dynamic environment, economy, politics. Thus, it is very difficult to predict a future price. Although, there are many technical indicators available for traders and investors at the present, the indicators might not be able to capture market behaviors. Nowadays, machine learning has more influence on the financial market prediction and trading strategies. This work introduced a stock market prediction by using the LSTM network model to predict future prices based on historical data. The model was trained in SET100 index from 2016 to 2019. Then, the model was tested through our trading operations on all stocks in SET100 in 2019 and 2020 to evaluate the profitable model. The experimental results show that the model is promising. The model in both long-only strategy and long-short strategy can achieve higher return than buy and hold, MACD, BB, RSI strategies both 2019 and 2020.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125131676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of Dextran-coated Magnetite Nanoparticles for Cancer Drug Delivery","authors":"Patcharaporn Tadsanaphum, N. Paradee","doi":"10.1109/ecti-con51831.2021.9454757","DOIUrl":"https://doi.org/10.1109/ecti-con51831.2021.9454757","url":null,"abstract":"Drug delivery is the technique of administering a drug to achieve a therapeutic effect in the humans based on the drug safety and efficacy at the targeted therapies. Magnetite nanoparticles (MNPs) can be the controlled drug delivery by using an external magnetic field to lead them into the target tissue. The drugs are attached to the MNPs via the functional groups of coating polymer. Thus, the aim of this research is synthesis of the MNPs by co-precipitation method for cancer drug carriers by using dextran as a biopolymer coating. The cancer drug namely mercaptopurine (Mer) was attached to the MNPs through the functional groups between the dextran and the drug. The synthesized MNPs was the spherical shape with the average sizes between 23-26 nm. However, the particle aggregation was reduced by dextran coating which results in the decrease of the particle size. The synthesized MNPs presented the superparamagnetic behavior with the magnetization in the range of 50-75 emu/g. Thus, dextran coating with optimized molecular weight on MNPs is suitable for cancer drug carriers because they can respond to an external magnetic field.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126179009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Suwalak, K. Phaebua, C. Phongcharoenpanich, T. Lertwiriyaprapa, S. Pathoumvanh, D. Torrungrueng
{"title":"Chipless RFID Sensing for Dielectric Property of Light Weight Concrete","authors":"R. Suwalak, K. Phaebua, C. Phongcharoenpanich, T. Lertwiriyaprapa, S. Pathoumvanh, D. Torrungrueng","doi":"10.1109/ECTI-CON51831.2021.9454793","DOIUrl":"https://doi.org/10.1109/ECTI-CON51831.2021.9454793","url":null,"abstract":"This paper presents a passive chipless RFID tag (Electromagnetic sensor) based on the modified printed monopole antenna with a frequency filter technique. The proposed chipless RFID sensor is the wireless sensor technology with the nondestructive technique (NDT) testing. This proposed RFID tag is designed to obtain both determination and identification (ID) properties for a sensor application. To determine the dielectric constant of MUT under test, the circular monopole tag antenna is modified using adding the elliptical shape to achieve the wideband operating frequency. Moreover, this sensor is used the stripline frequency filter technique to obtain the 1-bit ID at the frequency of 2.77 GHz. The CST Microwave Studio simulator program uses to design and optimize the passive chipless RFID parameters. Simulated results show the proposed chipless RFID sensor can identify and determine the dielectric property of the LWC under test.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115460830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Feasibility Study and Performance Analysis of NB-IoT communications for PEA Smart Grid Network","authors":"Kittiwat Srivilas, C. Pirak","doi":"10.1109/ECTI-CON51831.2021.9454827","DOIUrl":"https://doi.org/10.1109/ECTI-CON51831.2021.9454827","url":null,"abstract":"This research aims at studying the feasibility and performance analysis of NB-IoT as a last-mile network for Provincial Electricity Authority (PEA) smart grid implementation. In this study, data transmission models are simulated in order to analyze the performance in various wireless channels according to the NB-IoT specifications. BER and SER versus the signal-to-noise ratio (SNR) are used to evaluate the reliability of the channel. The communication channel scenarios studied in this research are modeled to reflect the different types of the area according to terrains and the density of connected devices that can be categorized into four propagation models. Specifically, the Rayleigh fading channel with the adjustment of the variance of the channel's paths corresponding to the power-delay profiles in each different propagation model is studied. From the experimental results, it has been showing that the performance of NB-IoT for the use in a rural area with a moderate density of connected devices (which is the most type of area in PEA's responsibility) has the best performance result. On the other hand, the use of NB-IoT in a big city with a high density of connected devices results in the worst performance among all simulated scenarios. The performance and reliability can be further enhanced by using a hybrid communication, which may integrate a PLC or RF-mesh communication systems into a network.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116021121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Clock & Data Recovery for PAM-4 in a Short-Range FSK Wireless Radio Link","authors":"Apinut Kaewmunee, P. Khumsat","doi":"10.1109/ecti-con51831.2021.9454807","DOIUrl":"https://doi.org/10.1109/ecti-con51831.2021.9454807","url":null,"abstract":"Clock and data recovery system (CDR) for PAM-4 signal for a short-range 27-MHz FSK radio is reported. For conceptual demonstration purpose, both CDR and RF circuits and systems have been experimentally verified with low-cost discrete component implementation. The basic principle in performing clock recovery from PAM-4 is by converting a PAM-4 signal into an NRZ (PAM-2) before further applying it to the three well-established CDR architectures. The technique can be simply extended to recover a clock signal from any PAM-m signal. The PAM-4 signal is modulated into a 4-FSK signal using a voltage-controlled oscillator with a 27-MHz carrier frequency. The class-A BJT-based power amplifier with 40%-PE has been employed to drive a spiral FR-4 PCB antenna. The inductive-generation low-noise amplifier with a peak voltage gain of 22dB and Q of 7 is employed to amplify the incoming signal before performing FSK demodulation to recover the PAM-4 signal. The transmission and CDR symbol rates are 31-155ksymbols/s for simple and Alexander CDRs and 90-117ksymbols for a Hogge CDR at the radio transmission range of 7 meters.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114476715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sasakorn Pichetjamroen, Ekkachan Rattanalerdnusorn, C. Vorakulpipat, A. Pichetjamroen
{"title":"Multi-Factor based Face Validation Attendance System with Contactless Design in Training Event","authors":"Sasakorn Pichetjamroen, Ekkachan Rattanalerdnusorn, C. Vorakulpipat, A. Pichetjamroen","doi":"10.1109/ecti-con51831.2021.9454779","DOIUrl":"https://doi.org/10.1109/ecti-con51831.2021.9454779","url":null,"abstract":"Various methods for face validation-based authentication systems have been applied in a number of access control applications. However, using only one biometric factor such as facial data may limit accuracy and use, and is not practical in a real environment. This paper presents the implementation of a face time attendance system with an additional factor, a QR code to improve accuracy. This two- factor authentication system was developed in the form of a kiosk with a contactless process, which emerged due to the COVID-19 pandemic. The experiment was conducted at a well- known training event in Thailand. The proposed two-factor system was evaluated in terms of accuracy and satisfaction. Additionally, it was compared to a traditional single-factor system using only face recognition. The results confirm that the proposed two-factor scheme is more effective and did not incorrectly identify any users.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122018859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Simulation of Outbound Functions in Warehouse Operations with Queueing Theory","authors":"Worawut Han-klup, T. Samanchuen","doi":"10.1109/ecti-con51831.2021.9454905","DOIUrl":"https://doi.org/10.1109/ecti-con51831.2021.9454905","url":null,"abstract":"In modern e-commerce, warehouse management is very crucial for overall service quality. Moreover, the cost of order picking in outbound logistics is estimated to be more than half of the total operating cost in warehouse activity. This work studies the factors of the order processing on average customer order throughput time where the picking, packing, and sorting functions are executed separately by either a single operator or multiple parallel operators. The proposed staff management by using the queuing theory is demonstrated. The data comprise a complete operational history of an e-commerce company, order by order, over 3 months in the year 2020. The queuing theory and statistic model are used to study this activity of the warehouse. To evaluate the efficiency of these operations, the simulation method is utilized. The result shows that the simulation is adequate in approximating the optimal number of pickers and packers. This work is explained generally to be practical for business leading to future research opportunities and giving more solutions from the existing technology supporting and solving the problems.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116833860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Comparative Analysis of Transient Performance between PWM-based and Model-predictive-control-based Virtual Synchronous Generators","authors":"Jonggrist Jongudomkarn","doi":"10.1109/ecti-con51831.2021.9454825","DOIUrl":"https://doi.org/10.1109/ecti-con51831.2021.9454825","url":null,"abstract":"Distributed generators (DGs) based on Virtual Synchronous Generator (VSG) control can suppress the deviation in frequency at the expense of producing power oscillation. It was suggested that a damping term produced from state feedback control could be included in the VSG scheme to solve this issue. This method has been recently adopted for the VSG control using different techniques such as the pulse width modulation (PWM) and the Finite-Control-Set-Model-Predictive-Control (FCS-MPC) schemes. In this paper, the differences in the transient response of the VSG brought by these two methods are studied. Small signal models for both control methods are derived for comparing the power and frequency dynamic response during a small loading transition. The results verified by simulation in PSCAD/EMTDC have shown that the FCS-MPC-based VSG control's suppressing ability against the maximal frequency deviation is superior to its PWM counterpart. (DC/AC converter, Distributed power generations, Power system dynamics, Predictive control, Virtual synchronous generator)","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124958653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Choorat, Kittinaporn Pornpromvinit, Varinthon Pikunthong, Vittawat Tidchai, Suttipan Aksornniem
{"title":"Curve Slope Estimation and Perpendicular Line Detection for Computing Automatic Footprint Chippaux-Smirak Index","authors":"P. Choorat, Kittinaporn Pornpromvinit, Varinthon Pikunthong, Vittawat Tidchai, Suttipan Aksornniem","doi":"10.1109/ECTI-CON51831.2021.9454822","DOIUrl":"https://doi.org/10.1109/ECTI-CON51831.2021.9454822","url":null,"abstract":"Approaches for automatic computing footprint Chippaux-Smirak Index by using Curve Slope Estimation and Perpendicular Line Detection methods are proposed in this paper. First, the k-mean clustering and the Circular Hough Transform approaches are applied to divide the footprint image into left and right sides and then removed the toe prints. Then, the horizontal integral intensity projection method is applied to obtain the position of the anterior and the posterior aspect of the toeless footprints. All boundary points of the footprint are located by the Morphological Gradient method. Subsequently, the slope of a curve at the point of tangency and the straight-lines which plane of the Lateral Calcaneal on the outside of the footprint image are then estimated. Finally, the length of the straight-line at the narrowest point on the foot arch, the length of the straight-line at the widest point at the metatarsals, and the footprint Chippaux-Smirak Index value were calculated by applying the Euclidean method. Footprint arch type are then classified by using the cutoff value of the Chippaux-Smirak Index. In this experiment, the average accuracy for automatic computing Chippaux-Smirak Index values in the footprint image is 90.17% and the accuracy for classification of the footprint arch type is 87.86% in comparison with the manual computation from the expert.","PeriodicalId":136203,"journal":{"name":"2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129130009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}