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An Exploration of the Performance of Prosumer Amidst Rapid Digital Evolution
(2025-01-01)
Sa-ardnak, Arissa
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Chaiyasoonthorn, Wornchanok
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Chaveesuk, Singha
The online business environment presents a diverse range of clients for entrepreneurs, leading to a wide range of lifestyle variances. This causes misunderstandings between each other, which can lead to problems in business operations. This research article aims to develop a research framework which influences the prosumer performance amidst rapid digital evolution in Thailand and is ready to cope with future changes. This research is using qualitative research methods. Data were collected using in-depth individual interviews. Important information providers include 25 Prosumers of social network. The Snowball sampling technique is applied in this study. The tools used for data collection were questions for semi-structured interviews combined with participant observation. The results of the research explore which variables influence Prosumer performance on rapidly changing digital platforms and how. This result motivates Prosumer to perform to achieve their goals.
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Comparison of YOLOv8 Models for Aircraft Detection in Airport Apron Using Digital Image Processing
(2024-06-01)
Wiangkam, Nitipoom
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Jiriwibhakorn, Somchat
Airport safety can be improved by efficient air traffic management, which monitors aircraft parking spots and controls their movement into them more efficiently. In addition to emergency situations, it can assist in accurately inspecting airport areas. Management costs can be reduced by reducing the workload of personnel in controlling and helping manage air and ground traffic. This research focuses on comparing the performance of various YOLOv8 models (YOLOv8n, YOLOv8s, YOLOv8m, YOLOv8nl, and YOLOv8nx) in an automated aircraft detection system using digital image processing techniques. The methodology involves collecting a dataset of 1,000 airport apron images with parked aircraft, dividing them into 900 training images and 100 testing images. The YOLOv8 models are trained on the training dataset, and their performance is evaluated on the testing dataset using confusion matrices. Experimental results reveal that YOLOv8nx achieves the highest average aircraft detection performance, with a precision of 0.94, recall of 0.74, and f1-score of 0.83. Additionally, YOLOv8n demonstrates the highest processing speed at 0.95 milliseconds. Consequently, YOLOv8n is suitable for applications requiring high-speed processing, while YOLOv8nx is ideal for tasks demanding the utmost performance efficiency.
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Innovative factors affecting performance of local government organizations in Thailand
(2024-01-01)
Tunjararuck, Anake
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Saengnoree, Amnuay
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Teerawatananond, Thapong
This dissertation aimed (1) to study factors that have causal influences that affect the performance of municipalities. (2) to study the causal relationship model of innovative organizations, innovative capabilities, service innovation and performance management that influences the performance of municipalities. (3) to develop a linear structural equation model of the influence of service innovation, innovation organization, innovative capabilities and performance management that affects the performance of local government organizations in the category of municipalities in Thailand. The sample group were 320 executives of local government organizations in the category of municipalities in Thailand. Sampling was done in 2 steps: stratified and systematic sampling. This study is a quantitative study, and the research tool was a structured questionnaire and data were analyzed by percentage, mean, standard deviation, skewness, kurtosis, and confirmatory component analysis and structural equation model analysis. The findings of this study demonstrate significant direct effects of innovative capabilities, service innovation and performance management on performance of local government organizations in Thailand. Moreover, it was observed that innovative organizations and innovative capabilities also exerted indirect effects on performance of local government organizations through their influence on performance management, serving as mediator variables. Through the development of a structural equation model, it was determined that innovative capabilities had the greatest overall influence on the performance of local government organizations in the category of municipalities in Thailand, followed by performance management, service innovation and innovation organization, respectively. This research study made executives of local government organizations in category of municipalities in Thailand can be used as a guideline in determining strategies for managing their organization to be able to keep up with changes in the digital world and to ensure that the performance of the local government organization achieves the specified goals in terms of both efficiency and effectiveness.
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INDIVIDUAL COMPETENCY CAUSAL FACTORS AFFECTING PERFORMANCE OF ACADEMIC PERSONNEL IN HIGHER EDUCATION INSTITUTION
(2024-01-01)
Lalaeng, Chanyaphak
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Subongkod, Mallika
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Sinlapasawet, Watchara
The objective of this research was to test an individual competency causal model affecting performance of personnel in higher education institutions. The study was conducted among education institutions in the upper southern of Thailand. The instrument used in the study was questionnaire. Data analysis was conducted using descriptive statistics, Pearson's correlation coefficient, confirmatory factor analysis, and causal factor analysis. The findings from the study found that 1) the individual competency causal model had an effect on performance of personnel in higher education institutions. It was consistent with the empirical data, considered from χ<sup>2</sup> = 994.860, df = 249, p = 0.000, χ <sup>2/</sup> df = 3.99, CFI = 0.94, TLI = 0.93, RMSEA = 0.06, SRMR = 0.04. Individual competency causal factors had an effect on performance of personnel with statistical significance. All predictor variables in the model could describe variance of performance, core competency, and job competency by 70.0%, 83.0% and 88.0% respectively.
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Tribovoltaic effect: Fundamental working mechanism and emerging applications
(2023-06-01)
Sriphan, S.
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Vittayakorn, N.
The triboelectric nanogenerator (TENG) is currently a promising technology operated by coupling mechanisms between contact electrification and electrostatic induction for efficiently converting mechanical energy into electricity. Broad applications have been demonstrated practically. However, the electrical signal produced from the TENG has a pulsed alternating current output, which needs to be rectified by the circuit from alternating current to direct current (DC) appropriately for powering/storing small electronic systems. This limits utilization by the drawbacks of conversion efficiency, size, and portability. The development of a DC TENG is thus essential. This novel physical phenomenon (DC TENG) emerged just recently, mainly based on Schottky, p-n and liquid-semiconductor junctions, and a multilayered structure junction (i.e. metal/semiconductor-insulator-semiconductor), called the tribovoltaic nanogenerator (TVNG). Pair sliding from two triboelectric materials with different electronic band energies serves as continuous DC with a unique mechanism. The excited carriers (corresponding with the generated outputs) can be enhanced from the tribovoltaic effect through theoretical design, and the concept can be hybridized with other technologies. This provides the potential of in-depth study and practical demonstrations for advanced harvesting and sensing. This review comprehensively presents the origins of triboelectric and tribovoltaic effects, related to fundamental and dynamic TVNG mechanisms in various material systems, and recent progress of the TVNG in designs and applications. Moreover, the challenge and outlook are discussed lastly for the future direction of TVNG development.
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Simple Method for Enhancing Performance of the Bacterial Cellulose-Based Triboelectric Nanogenerator by Adding Conductive Interlayer
(2023-01-01)
Sriphan, Saichon
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Pharino, Utchawadee
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Pakawanit, Phakkhananan
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Bongkarn, Theerachai
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Vittayakorn, Wanwilai
Surface charge density is a key factor that greatly enhances the performance of a natural-based triboelectric nanogenerator (TENG), which is essential for future sustainable sensing and harvesting devices. This work introduced a conductive interlayer between a main frictional layer and electrode. This approach can suppress the charge recombination rate and improve the amount of charges produced during the triboelectrification process. Bacterial cellulose (BC) film was selected as a main frictional layer for the TENG. A conductive nanomaterial, i.e. silver flake, was incorporated into the BC film as an intermediate layer for enhancing TENG performance. As firstly reported, the maximum electrical outputs for the multi-layer BC structure could be found when using silver flake/BC composite (ratio 1:5) as an intermediate layer, which has 122 V and 8.2 µA of output voltage and current, respectively. This is higher than the output voltage and current of a single layer BC TENG by approximately 3 and 8 times, respectively. The maximum output power of ∼440 µW is achieved by connecting with a load resistor of ∼10 MΩ. This demonstrates an efficient strategy for designing a high performance energy harvester by adding an intermediate layer for the target of practical purposes in sustainable systems.
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Hybrid piezoelectric-triboelectric nanogenerators for flexible electronics: Recent advances and perspectives
(2022-09-01)
Sriphan, Saichon
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Vittayakorn, Naratip
For several decades, a focus has been placed on the development of future flexible electronics, including electronic skin, wearable devices, environmental monitoring systems and the Internet of things (IoT) network. The triboelectric nanogenerator (TENG) attracted attention by developing this technology due to its high-performance, facile design/fabrication, light-weight and high flexibility. However, in some cases, the use of pristine triboelectric material for a TENG operation might be insufficient for efficiently driving/sensing small-to-medium electronic systems without modification. Hence, a hybrid strategy between piezoelectric and triboelectric effects from piezoelectric nanogenerator (PENG) and TENG is proposed. This unique characteristic serves as a combination of polarized charges from the piezoelectricity and surface charges from the triboelectric effect when the hybrid device is subjected to mechanical stress. This provides a higher yield of charge density, which relates to a higher magnitude of output current. Through outstanding performance, the hybrid PENG and TENG can be applied in various fields, especially in flexible electronics technology. Herein, an overview of recent advances for hybrid PENG and TENG development is presented, including basic mechanisms, related theories, coupling effect, performance factors, and potential applications. The final part also discusses the challenges and perspectives for further development and the opportunity for the commercialization of this nanogenerator.
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Effect of strain and gender on production performance, carcass characteristics and meat quality of broiler chickens
(2022-03-01)
Kamporn, K.
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Deeden, B.
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Klompanya, A.
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Setakul, J.
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Chaosap, C.
The effects of strain and gender on production performance, carcass characteristics, and meat quality of broiler chickens were examined. There were no significant interactions between broiler strain and gender (P>0.05). Arbor Acres showed significantly higher body weight (BW) and average daily gain (ADG), while feed intake (FI) and feed conversion ratio (FCR) were significantly lower than Ross308 and Cobb500, especially in the fifth and sixth weeks of age. Arbor Acres also showed the highest slaughter weight (P<0.05). However, carcass composition was not significantly different between strains. There were no significant differences between the strains in muscle pH, drip loss and cooking loss. However, Cobb500 had a lower shear force value than the others (P<0.05). As for the gender-specific effect, BW and ADG of male broilers were higher than those of females from the second to the sixth week of age (P<0.01). At the second week of age, female broilers had higher FI, while male broilers had higher FI from the third to the sixth week of age (P<0.01). Male broilers had lower FCR than females from the fourth to the sixth week of age (P<0.01). Male broilers had higher slaughter weight, carcass weight and carcass composition weight (P<0.01) except for abdominal fat (P>0.05). Percent carcass composition did not differ among broiler strains except for percent tenderloin and percent abdominal fat, which were higher in females than males (P<0.01). Broiler strains had no effect on meat quality except that Cobb500 had lower shear force (P<0.05). The pH3, pH24 and yellowness color values had differed between genders, which male muscle had higher pH3 (P<0.05), pH24 (P<0.01) than female but female muscle had higher yellowness value than male (P<0.05). Interaction effect between breed and gender was found in lightness (P<0.01) and redness colors (P<0.05).
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Barriers to electric vehicle adoption in Thailand
(2021-11-01)
Kongklaew, Chanwit
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Phoungthong, Khamphe
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Prabpayak, Chanwit
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Chowdhury, Md Shahariar
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Khan, Imran
Electric vehicles (EVs) are considered to be a solution for sustainable transportation. EVs can reduce fossil fuel consumption, greenhouse gas emissions, and the negative impacts of climate change and global warming, as well as help improve air quality. However, EV adoption in Thailand is quite low. Against this backdrop, this study investigates barriers and motivators for EV adoption and their public perception in Thailand. A total of 454 responses were collected through an online questionnaire. The results indicate that the top three concerns of respondents about EVs are public infrastructure and vehicle performance in terms of charge range and battery life. Respondents with more than five years of driving experience in the age range of 26–35 years old could be key targets for early EV adoption.
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The influence of fattening periods on performance, carcass composition, and meat quality of Charolaise crossbred steers
(2020-12-01)
Kheawrod, W.
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Sivapirunthep, P.
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Thiwaratkoon, P.
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Chongcharoen, M.
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Chancharoen, P.
Results showed that the initial weight did not differ between groups (P>0.05). While, the 15 month group had more heavy weight than 12 month group (P<0.01). Furthermore, the 15 month group gained more weight than 12 month group (P<0.05). The average daily gain of 15 month group was higher than 12 month group (P<0.01) which were 723.62 and 603.30 gram/day, respectively. The weight of hot and cold carcass of 15 month group was higher than 12 month group (P<0.01) while the percentage of hot and cold carcass did not differ between group (P>0.05). For carcass composition, lean percentage (P<0.01) and bone percentage (P<0.05) were higher in 15 month group than in 12 month. Meat color, shrinkage loss, cooking loss, and shear force did not affect by fattening period (P>0.05). In addition the fattening period did not impact on collagen content and also collagen solubility (P>0.05).
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