Wardkein, Paramote
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Preferred name
Wardkein, Paramote
Alternative Name
Wardkein, P.
Wardkein, Pramote
Main Affiliation
Email
paramote.wa@kmitl.ac.th
22 results
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Item type:Publication, Chainsaw location finding based on travelling of sound wave in air and ground(2020-04-08) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of hot air temperature on moisture reduction and drying time of turmeric in a closed-system herb dryer: kinetics and models(2023-11-01); Chantrawongphisal, BorisutThe primary objective of this research was to devise a model focused on the drying kinetics of turmeric, utilizing a closed-system herb dryer to facilitate energy conservation. Drying turmeric within this closed-system herb dryer involves a heat source—specifically, an electric coil heater powered at 3500 W and a humidity controller. The drying condition includes an air volume of 0.039 kg/s, the temperature at 40, 50, and 60 °C with initial moisture of the turmeric at 667.53 %db. The result of drying turmeric was analyzed using a thin-layer drying model for 8 models: Newton, Page, Logistic, Henderson and Pabis, Logarithmic, Two-Term, Approximation of Diffusion, Midill et al. The result shows that Midill et al. equation was the best model for predicting the drying behavior of turmeric. Therefore, this insinuates that the Midill model is superior to its contemporaneous counterparts in terms of accuracy. It offered the highest coefficient of determination R <sup>2</sup> (0.9998, 0.9996, 0.9999), the most root mean square error (RMSE) (3.39×10<sup>−9</sup>, 2.37×10<sup>−5</sup>, 3.10×10<sup>−5</sup>), the last chi-square χ <sup>2</sup> (3.39×10<sup>−9</sup>, 2.85×10<sup>−5</sup>, 3.99×10<sup>−5</sup>), and a temperature of 40, 50, and 60 °C, respectively. The study revealed that implementing a closed-system herb dryer could potentially manufacture high-value commodities while preserving their fundamental attributes. The closed-system herb dryer has been ingeniously designed as a proficient approach to diminish the drying time and improve the end product’s quality. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Novel Chirp Demodulation Scheme Based on SAGC for Amateur Radio Data Transmission(2021-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Fully Digital Cosine Signal Driven Pulse Oximeter Without Bandpass Filter Based on Microcontroller(2022-04-20); In this research, almost fully digital microcontroller pulse oximeter processing by two frequencies of cosine wave-driven red and infrared light sources as well as direct recovering photoplethysmography (PPG) signals from FDM signal without bandpass filter with coherent amplitude demodulation is proposed. An ESP32 microcontroller is employed to generate two cosine waves with two difference equation algorithms instead of using the function of cosine from Arduino or C library language. Two frequency digital cosine wave signals are generated and converted to analog signals with D/A to drive two light sources while two digital cosine signals as mentioned above are recognized in order to use to be as two local oscillator cosine wave signals for recovery of two PPG signals with synchronous demodulation. The RED and IR PPG signals are later used to estimate blood oxygen saturation (SpO2). The experimental result shows that it works well with accuracy and precision of 99.4448% and 0.5551, respectively. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Bluetooth Breathing Sound Detection Device Based on Time and Frequency Domain Analyze(2022-04-20) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Development of a Phase-Locked Loop Circuit in Running Frequency Mode for Capacitance-to-Voltage Conversion(2025-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Novel Double Slope Frequency Shift Chirp Symbol(2024-01-01); One of the most significant concerns in serial digital communication is the synchronization of data bits between the transmitter and receiver. Therefore, the preferred coding symbols should contain an inherited clock signal. The cyclic-shift chirp, which is primarily used in long-range systems, employs a single slope in a symbol, which contains few information for synchronization. Hence, two new forms of cyclic-shift chirp symbols are proposed herein. The associated coding schemes are based on the use of a dual slope within one symbol. Synchronization is inherited in the coding symbol using a dual slope. Additionally, both proposed coding schemes utilize the same decoding technique. The decoded chirp symbol is in the form of a pulse width modulation signal, which can be used for synchronization and retrieving data bits from their duty cycle. The simulation results show that the coding and decoding processes of the proposed coding schemes align with those of a theoretical framework. The error performance analysis for the proposed detection scheme is given and the results of error probability analysis are consistent with the simulation results. Moreover, under a Rayleigh fading channel, the proposed coding schemes provide superior performance compared with other comparable coding schemes. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, DSSZ-SM: A Simplified Chirp Coding Scheme with Inherent Clock Synchronization(2026-06-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Discrete Time Two-Frequency Shift Keying(2024-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Pulse Oximetry Based on Quadrature Multiplexing of the Amplitude Modulated Photoplethysmographic Signals(2023-07-01); ; ;