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Growth stage detection for food consumption management in smart cricket farming using a deep learning technique
(2025-11-01)
Nutnoi, Nitipoom
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Yindeesuk, Witoon
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Kamoldilok, Surachart
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Srinuanjan, Keerayoot
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Limsuwan, Pichet
This research proposed a novel method for tracking and predicting the growth stages of two-spotted crickets, reared in a temperature-controlled box at different growth stages using the YOLOv5s model. The images of crickets feeding inside the rearing box were taken with an infrared camera above the feeding point every hour. Images of the cricket were used to train a YOLOv5s model to detect crickets for each growth stage in the rearing box. The experimental results showed that the trained deep learning had an average accuracy of 95.7%. The relationship between the ratio of crickets at each growth stage throughout the 45-day rearing period was plotted and discussed. The results also showed a clear relationship between the amount of food consumed by crickets per day and their growth stage, which could be useful for appropriately managing food consumption according to the growth stage of crickets.
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Laser-Carved Legacy: Exploring the Scientific Construction and Cultural Significance of the World’s Largest Golden Buddha in Thailand Through a Tourist Perspective
(2025-10-01)
White, Pattarinee
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Phae-Ngam, Wuttichai
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Kamoldilok, Surachart
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Naemchanthara, Kittisakchai
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Limsuwan, Pichet
This research investigates the intersection of construction innovation and cultural heritage through the lens of tourist perceptions of the world’s largest carved golden Buddha, situated at Khao Chi Chan Mountain, Pattaya, Thailand. Positioned as an emerging tourism destination, this site contributes to the rebranding of Pattaya as a globally significant hub for religious tourism. This study highlights how this monumental Buddha statue fosters spiritual experiences, promotes the conservation of art and culture, and encapsulates a historical narrative tied to Thailand’s royal lineage. Notably, the statue’s creation employed a pioneering technique—the only one of its kind worldwide—involving laser-guided carving by artisans, followed by gold leaf application to enhance its aesthetic magnificence. A mixed-methods research approach was adopted, integrating historical document analysis with narrative accounts of the statue’s construction using modern technology, complemented by quantitative data collected through tourist questionnaires. By documenting the historical use of laser technology in creating this iconic Buddhist landmark, this research corrects misconceptions about its construction process and highlights the innovative application of a 20 W Argon ion laser for drawing the image of Buddha on the cliff. This study evaluates tourist perceptions using the DHARMA model, revealing how Destination Identity, Heritage Values, and Memorable Experiences foster emotional connections and spiritual enrichment (β = 0.801, p < 0.001). The findings underscore Khao Chi Chan’s potential to reposition Pattaya as a hub for Buddhist tourism, diversifying its image beyond nightlife-centric tourism. This work contributes to sustainable tourism by demonstrating how sacred sites can balance cultural preservation and economic vitality, offering insights for heritage management and urban tourism development in Southeast Asia.
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Preparation and Characterization of Low-emissivity AlN/Ag/AlN Films by Magnetron Co-sputtering Method
(2023-09-01)
Phae-Ngam, Wuttichai
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Kamoldilok, Surachart
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Rattana, Tanattha
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Lertvanithphol, Tossaporn
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Mungchamnankit, Araya
AlN and Ag thin films were deposited independently on the Si(100) wafers and glass slides by sputtering technique at various times to find the optimum deposition times for coating AlN and Ag films layers. The results obtained from glazing-incident X-ray diffraction (GIXRD), field-emission scanning electron microscopy (FE-SEM), and transmittance measurements showed that the optimum deposition time for coating AlN and Ag film layers were 40 min and 15 s corresponding to the film thickness of 46.7 and 19.6 nm, respectively. The optimum deposition times were used for coating AlN and Ag films in the multilayer AlN/Ag/AlN film stack. Then, the multilayer AlN/Ag/AlN film stack was deposited on the glass slide for transmittance measurement and a test glass plate with a size of 10 cm x 10 cm for infrared protection testing. The average solar transmittances in the visible range (λ = 380-780 nm) and in the near infrared range (λ = 780-2,000 nm) were found to be 48.05 and 15.17%, respectively which are comparable with those of a commercial glass.
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Fabrication and Characterization of Ag–Ta Thin Films by Co-Magnetron Sputtering as Alternative Layer for High Reflection of NIR Radiation
(2023-01-01)
Phae-Ngam, Wuttichai
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Rattana, Tanattha
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Kamoldilok, Surachart
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Kohmun, Kanokporn
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Nakajima, Hideki
Silver–tantalum (Ag–Ta) thin films were fabricated by magnetron co-sputtering on silicon (Si) wafer (100) and glass slide substrates at room temperature. The Ag–Ta thin films were prepared at various deposition times of 5, 10, 20 and 30 s and the physical, structural and optical properties of the Ag–Ta thin films were investigated. It was determined that the thicknesses of the films were 7, 9, 17 and 33 nm, respectively. The results revealed that an increase in the film thickness leads to a monotonic increase in FCC and BCC phase of Ag and Ta, respectively. The work function and stoichiometric of the Ag–Ta thin films were investigated by ultraviolet and X-ray photoemission spectroscopies (UPS and XPS), respectively. The potential of Ag–Ta thin films to be used as low-emission coating was investigated using a spectrophotometer. A UV–VIS–NIR spectrophotometer was used to measure the spectral reflectance in the wavelength range from 300 to 2000 nm. The results showed that the Ag–Ta thin film deposited for 30 s exhibited higher reflectance in NIR region than those of 5, 10, 20 and 30 s. It demonstrated an average reflectance of about 80% and slightly decreased to 75% after being kept in the air atmosphere for 28 days. It can be likewise proposed as an alternative thin film with high reflectance of NIR radiation single layer to develop industrial low-emission coating for cost-effective, clean, and easy adaptation to a large area coating.
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Electronic nose ammonia gas monitoring via IoT system for Chlorella sp. cultivation
(2023-01-01)
Srinuanjan, Keerayoot
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Kruakuanphet, Aphichaya
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Phongwisit, Phachara
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Yindeesuk, Witoon
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Kamoldilok, Surachart
In this paper, we present an electronic nose ammonia gas monitoring via IoT system for Chlorella sp. cultivation. The MQ–137 gas sensor module is selected as the primary sensor for measuring ammonia gas concentration. The pH sensor module is the sensor for measuring the pH levels in Chlorella sp. ponds. The MQ–137 gas sensors are calibrated with a known concentration of ammonia gas in the calibration box. Calibration conditions are set corresponding to low concentration of ammonia gas produced by Chlorella sp. cultivation. The pH sensor module is calibrated against a standard pH buffer. The calibration data obtained from the calibration method is input into computer programming and processed by the ESP8266 microprocessor. After calibration, the MQ–137 gas sensor and pH sensor modules are used to measure the ammonia gas concentration and pH levels in the Chlorella sp. ponds. Chlorella sp. is cultivated under three conditions of light intensity, natural light with an average light intensity of 1521 Lux, and artificial light with a light intensity of 1000 Lux and 2000 Lux, respectively. The ammonia gas concentration and pH levels of Chlorella sp. cultivation are transferred to the cloud system and displayed via the IoT system. And the system can also send a notification to a smartphone when ammonia gas concentration and the pH levels reach the specified value.
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Design and simulation of asymmetric Y-junction beam splitter with controllable splitting based on adjusted air-hole defect
(2022-01-01)
Phongwisit, Phachara
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Kamoldilok, Surachart
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Buranasiri, Prathan
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Srinuanjan, Keerayoot
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Limsuwan, Pichet
We report a construction of a new asymmetric Y-junction beam splitter with a controllable splitting ratio and simulate this splitter. The splitter is based on InP, has the area 65.0 µm<sup>2</sup> and operates at the light wavelengths 1.48 and 1.55 µm. Under condition of no air-hole defect, the splitting ratio for the output ports 1 and 2 is equal to 92/8 at the both wavelengths. To control the splitting ratio, air-hole defects with different (diamond, square and cylinder) shapes are introduced at the junction between the two output ports. Our simulations confirm that the splitting ratio of the beam splitter can be efficiently controlled by changing the size and the shape of the air-hole defect. The maximal splitting ratios at our operating wavelengths are equal to 10/90 and 14/86 and the appropriate average insertion losses amount to 0.36 and 0.31 dB for all of defect shapes.
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Multi-range Ammonia Gas Sensor Control and Monitor via IoT System
(2022-01-01)
Kruakuanphet, Aphichaya
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Phongwisit, Phachara
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Yindeesuk, Witoon
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Kamoldilok, Surachart
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Srinuanjan, Keerayoot
In this paper, we present a multi-range of ammonia gas concentration control and monitoring via IoT system. We can select the ammonia gas concentration measurement range by adjusting load resistance within the voltage divider circuit. The appropriate measurement range, which corresponds to the concentration of ammonia gas produced by agricultural and industrial activities, can control and monitor via Blynk application. The MQ-137 gas sensor is selected as the main sensor, and each load resistance condition within the voltage divider circuit is calibrated with known ammonia gas concentration inside a calibration box. The calibration data is input into computer programming and processed by ESP8266 microprocessor. After calibration, we obtained a multi-range ammonia gas sensor suitable for measuring the ammonia gas concentration for each concentration range. The experiment showed that load resistance affects the measurement accuracy of ammonia gas concentration. We can select the load resistance suitable for the ammonia gas concentration and display on a smartphone via IoT system.
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Low-cost tunable light source using RGB-LED module for absorption spectroscope
(2019-01-01)
Kamoldilok, Surachart
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Phongwisit, Phachara
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Tipaphong, Weraphan
This paper focused for possibility to use RGB-LED module as a tunable light source for absorption spectroscope. Nowadays, commercial instrument uses Xenon lamp with Monochromator to select a specific wavelength for tested some properties on a sample. This part is a core of performance in an instrument and it increase cost of an instrument. In this paper, RGB-LED module will replace for a part of Xenon lamp and Monochromator to select a specific wavelength for measurement absorption or transmission properties. By used Arduino controller with pulse-width modulation method (PWM), a specific wavelength can control by mixed light that emitted from RGB-LED module. Resolution from this method can tuned an optical wavelength in range of visible light (400-700 nm) by 5 nm. Results from this work had difference from the commercial instrument less than 5%. Accuracy of this setup was proved with standard deviation (SD) and uncertainty about 0.0904 and 0.0286. This work can apply for light source to studies absorption or transmission properties of material in basics laboratory.
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Elongation measurement using 1-dimensional image correlation method
(2016-01-01)
Phongwisit, Phachara
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Kamoldilok, Surachart
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Buranasiri, Prathan
Aim of this paper was to study, setup, and calibrate an elongation measurement by using 1- Dimensional Image Correlation method (1-DIC). To confirm our method and setup correctness, we need calibration with other methods. In this paper, we used a small spring as a sample to find a result in terms of spring constant. With a fundamental of Image Correlation method, images of formed and deformed samples were compared to understand the difference between deformed process. By comparing the location of reference point on both image's pixel, the spring's elongation were calculated. Then, the results have been compared with the spring constants, which were found from Hooke's law. The percentage of 5 percent error has been found. This DIC method, then, would be applied to measure the elongation of some different kinds of small fiber samples.
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Accurate RMS calculations for periodic signals by Trapezoidal rule with the least data amount
(2013-11-12)
Poomjan, Sompop
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Taengtang, Thammarat
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Srinuanjan, Keerayoot
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Kamoldilok, Surachart
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Buranasiri, Prathan
The purpose of this research is to present a simple method using the least data amount to calculate root mean square (RMS) values of periodic signals (constructed from Fourier series) which the highest harmonic order is known or able to be estimated. In the research, trapezoidal rule with the least data amount was proved and tried to calculate definite integral values of sinusoidal signals from a lot of trial runs until a significant property was found. Then the property would be deployed to calculate RMS values. Results of the research can provide not only more convenient processes of simple trapezoidal rule but also more accurate results than the patented Simpson's rule in the same least data amount. © 2013 Sompop Poomjan et al.

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