Limsuwan, Pichet
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Preferred name
Limsuwan, Pichet
Alternative Name
Limsuwan, P.
Main Affiliation
Email
pichet.li@kmitl.ac.th
76 results
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Item type:Publication, Investigation of the characteristic of the Nd:YAG laser for standard wavelength in metrology(2013-10-08); This research studied characteristics of the Nd:YAG laser with second harmonic generation (SHG) at 532 nm. It can be develop as a standard wavelength according to the recommendation made by the Comite' International des Poids et Measures (CIPM). This study investigates various parameters that effect wavelength and laser power of the Nd:YAG laser such as injection current of diode laser, temperature of Nd:YAG crystal and second harmonic generator crystal. Its wavelength can be tuned in the range of standard wavelength at 532.24503 nm with 10<sup>-7</sup> of stability. © (2013) Trans Tech Publications, Switzerland. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Enhancing the anti-tarnish and mechanical properties of gold-coated silver sheets for decorative applications using TiO2 film protection(2024-12-01); ; This study explores an innovative method to enhance the anti-tarnish and mechanical properties of gold-coated silver sheets, targeting decorative applications through the TiO<inf>2</inf> film coatings. The research focuses on gold films with a thickness of approximately 100 nm, and TiO<inf>2</inf> films ranging from 10 to 31 nm. It was observed that the color of the multilayer coatings exhibited significant sensitivity to variations in thickness, indicating that a TiO<inf>2</inf> coating with a thickness around 20 nm could be optimally applied to the gold film, maintaining an acceptable ΔE value. X-ray photoelectron spectroscopy analysis demonstrated the TiO<inf>2</inf> film's potential to inhibit the formation of Ag<inf>2</inf>S on the surface, thereby enhancing tarnish resistance. Furthermore, the application of a 20 nm TiO<inf>2</inf> layer reduced the friction coefficient from 0.28 to 0.24 for gold-coated silver. Durability tests involving 1,000 abrasion cycles revealed that the gold film without TiO<inf>2</inf> protection experienced delamination, with only about 57 % of the coated area remaining intact. In contrast, the samples protected with a TiO<inf>2</inf> layer retained approximately 90 % of the coating, underscoring the effectiveness of TiO<inf>2</inf> in preserving the structural integrity and appearance of the gold-coated silver sheets. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Fabrication luminescence and radiation shielding properties of Gd2O3–La2O3–ZnO–B2O3–Sm2O3 glasses(2023-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Growth stage detection for food consumption management in smart cricket farming using a deep learning technique(2025-11-01); ; ; 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimization of end-fire coupling between an LED mid-IR light source and SiNx optical waveguides for spectroscopic sensing(2021-12-01); Chaisakul, PapichayaWe design and optimize an optical coupling structure between a superluminescent light emitting diodes (SLED) and SiN<inf>x</inf> waveguides for the optical sensing, in which an efficient coupling between these waveguides is challenging due to significant cross-sectional difference. From FDTD investigation, we identify the coupling scheme that is suitable to directly couple light from a SLED into a relatively-thin SiN<inf>x</inf> waveguide suitable for optical sensing based on the evanescent field absorption. The coupling structure is systematically investigated and optimized in terms of refractive indices, coupler's geometrical parameters, and fabrication variations with corresponding detection performance. The coupling scheme could be instrumental in enabling the use of SLED technology in Si-based photonic integrated circuits for sensing applications. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simultaneous Seebeck coefficient and electrical conductivity enhancement of GeSbTe films via Sn addition(2022-06-15); ; Sn-added GeSbTe (GST) thin films were deposited using a co-magnetron sputtering technique. The effects of varying the Sn content through a variable Sn target sputtering power and post annealing at 673 K were investigated. The DC power density applied to the GST target was controlled at 50 W, while the power density of the Sn target was increased from 0 W to 40 W. The results demonstrate the coexistence of the fcc-GST, hcp-GST and SnTe phases in the Sn-added GST thin films. The substitution of Sn at the Ge-site increases the crystallization speed and leads to defects and lattice disordered local arrangement in the GST films, causing the Seebeck coefficient to increase. The SnTe phase was created as a result of the high Sn content in the sample due to the over-doping limit of Sn into the GST structure. The presence of SnTe in Sn-doped GST films increased the electrical conductivity. The maximum power factor of 17.0 μW/cmK<sup>2</sup> at 450 K was obtained at an Sn content of 14.7 at%. These results indicated that the thermoelectric properties of Sn-doped GST films were improved via the formation of an appropriate amount of SnTe composite. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Enhancement of gamma and X-ray shielding behaviors in ZnO-B2O3 glasses via La2O3 addition: Experimental and theoretical investigations(2025-12-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Energy-saving synthesis and β-phase enhancement of Cu2Se thermoelectric materials via the microwave hybrid heating technique(2021-10-25); ; ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, EFFECT OF ADDING Cs2O ON γ-RAY SHIELDING PERFORMANCE OF IRON PHOSPHATE GLASS USING FLUKA AND WINXCOM PROGRAMS(2025-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Ca co-doped CsI(Tl) crystal scintillator for γ- and X-ray detecting applications(2025-01-01)