Now showing 1 - 10 of 15
  • Some of the metrics are blocked by your 
    Item type:Publication,
    Growth stage detection for food consumption management in smart cricket farming using a deep learning technique
    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 your 
    Item type:Publication,
    A nano-scale transducer using a PANDA type ring resonator for gas sensor applications
    (2012-03-01) ; ;
    Tipaphong, Weraphan
    ;
    Yupapin, Preecha P.
    We present a new system of nano-scale gas sensor using PANDA type ring resonator, whereas the sensing unit is a splitting ring resonator with two and four gaps. The method of finite difference time domain (FDTD) via the computer programming called Opti-wave was used to analyze and simulated all the parameters. The two systems were compared and the simulation result shown that the system of four splitting gaps is better resolution and more linear relationship than two splitting gaps unit. Finally, we found that this system can be used to be a high-precision self-calibration nano-scale gas sensor with in the of resolution of 1 nm. © 2011 Elsevier GmbH. All rights reserved.
  • Some of the metrics are blocked by your 
    Item type:Publication,
    Accurate RMS calculations for periodic signals by Trapezoidal rule with the least data amount
    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.
  • Some of the metrics are blocked by your 
    Item type:Publication,
    Design and simulation of asymmetric Y-junction beam splitter with controllable splitting based on adjusted air-hole defect
    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.
  • Some of the metrics are blocked by your 
    Item type:Publication,
    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
    ;
    Phae-Ngam, Wuttichai
    ;
    ;
    Naemchanthara, Kittisakchai
    ;
    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.
  • Some of the metrics are blocked by your 
    Item type:Publication,
    Tissue culture system using a PANDA ring resonator and wavelength router for hydroponic plant
    (2012-06-12) ;
    Suwanpayak, Nathaporn
    ;
    Suttirak, Saisudawan
    ;
    Yupapin, Preecha P.
    A novel system of nanofluidics trapping and delivery, which is known as a tissue culture system is proposed. By using the intense optical pulse(i.e., a soliton pulse) and a system constructed by a liquid core waveguide, the optical vortices (gradient optical fields/wells) can be generated, where the trapping tools in the same way as the optical tweezers in the PANDA ring resonator can be formed. By controlling the suitable parameters, the intense optical vortices can be generated within the PANDA ring resonator, in which the nanofluidics can be trapped and moved (transported) dynamically within the Tissue culture system(a wavelength router), which can be used for tissue culture and delivery in the hydroponic plant system. © 2011 IEEE.
  • Some of the metrics are blocked by your 
    Item type:Publication,
    Novel communication security scheme using dark-bright soliton conversion behaviors
    (2011-02-01) ;
    Teeka, Chat
    ;
    ;
    Yupapin, Preecha P.
    We propose a novel scheme of communication security using dark-bright soliton conversion behaviors in which the transmission signals can be secured by using the random codes generated by dark-bright soliton conversion within the system. The system consists of two parts, where first, an optical Mach Zhender interferometer (MZI) is used to generate the coincidence dark and bright soliton pair by using the (2) phase retarder (i.e., a coupler), in which |D and |B states represent the orthogonal dark and bright soliton pulses. The signals from through (Th) port are formed and transmitted via the transmission line to the end user. Second, the adddrop filter is used to separate(filter) the required signal form the transmission link, in which the Th and drop port signals are formed as a reference and signal, respectively. In this case, we assume that both solitons are input into the MZI ports simultaneously (coincidently), in which the binary codes are randomly formed and used to present the transmission data, in which the states 0 and 1 are represented by |DB and |BD, respectively. Finally, the eavesdropper and signal accuracy are also described. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
  • Some of the metrics are blocked by your 
    Item type:Publication,
    Proof of using fourier coefficients for root mean square calculations on periodic signals
    The purpose of this work is to academically prove using Fourier coefficients of periodic signals for root mean square (RMS) calculations. In the detail, properties of Fourier series are brought to calculate RMS values of periodic signals obviously. Results from this work can confirm that this method is more convenient, efficient and simple for RMS calculations than Calculus integration technique (if Fourier coefficients are given) and can be cited for further researches. © 2014 Sompop Poomjan et al.
  • Some of the metrics are blocked by your 
    Item type:Publication,
    Drug trapping and delivery for Alzheimer's diagnosis
    (2012-10-01)
    Jalil, M. A.
    ;
    ;
    Saktioto, T.
    ;
    Ong, C. T.
    ;
    Yupapin, Preecha P.
    In this investigation, a new design based on a PANDA ring resonator as an optical trapping tool for tangle protein, molecular motor storage, and delivery is proposed. The optical vortices are generated and the trapping mechanism is controlled in the same way as the conventional optical tweezers. The trapping force is produced by a combination of the gradient field and scattering photons. The required molecular volume is trapped and moved dynamically within the molecular network. The tangle protein and molecular motor can be transported and delivered to the required destinations for Alzheimer's diagnosis by molecular buffer and bus network. © 2012 Informa Healthcare USA, Inc.
  • Some of the metrics are blocked by your 
    Item type:Publication,
    White light generation and amplification using a soliton pulse within a nano-waveguide for the potential of solar energy conversion use
    (2010-11-01)
    Mitatha, Somsak
    ;
    ;
    Yupapin, Preecha P.
    We propose a novel system of a nano-waveguide that can be used to generate the continuous optical spectra, i.e. white light. A system consists of two micro and a nanoring resonators that can be integrated into a single system. The large bandwidth signal is generated by using a soliton pulse propagating within a Kerr type nonlinear medium, whereas the continuous bandwidth or wavelength of light signal can be performed. Results obtained have shown the potential of using such system for white light source generation and amplification, which is discussed in detail. The amplified pulse can be stored within a nano-waveguide, which is allowed to form the continuous spectrum after amplification. Alternatively, the low level solar radiation can be amplified, and the bandwidth signals can also be enlarged. © 2010 Elsevier Ltd. All rights reserved.