bluuebunny/crossref_metadata_2025 huggingface dataset:
Deep consecutive attention network for video super-resolution
Authors:   , Saleem Talha
Published: September 2023

In the video application, slow motion is visually attractive and gets more attention in video super resolution. To generate the high-resolution (HR) slow motion video frames from the low-resolution (LR) frames, two sub-tasks are required, including video super-resolution (VSR) and video frame interpolation (VFI). However, the interpolation approach is not successful to extract low level feature attention to get the maximum advantage from the property of space-time relation. To this extent, we propose a deep consecutive attention network-based method. The multi-head attention and an attentive temporal feature module are designed to achieve better prediction of interpolation feature frame. Bi-directional deformable ConvLSTM module aggregates and aligns with the information from the multi-head attention and temporal feature block to improve the quality of video frames. This method synthesizes the HR video frames from LR video frames. The experimental results in terms of PSNR show the proposed method of deep consecutive attention outperforms 0.27 dB and 0.31 dB for Vid4 and SPMC datasets respectively, in average of PSNR compared to state-of-the-art baseline method.
Critical success factors for data warehouse implementation in an industrial associations organization
Authors:   , Khantayana Phatnarin
Published: September 2023

The purpose of this research is to delve into the key success factors (CSFs) associated with data warehouse (DW) implementation from the perspectives of various stakeholders within an organization. A data warehouse provides a unified and structured view of an organization's data for analysis and reporting, and successfully implementing such a system can have a significant impact on overall organizational performance. It enables better data management, facilitates improved decision-making, and enhances strategic planning.

The scope of this research encompasses an in-depth examination of the core CSFs that are instrumental in achieving success during data warehouse deployments. It focuses on understanding and analyzing the factors that contribute to the effectiveness and efficiency of data warehouse projects from the perspectives of different stakeholders. These stakeholders include users who are the primary beneficiaries of the data warehousing system, as well as the IT department responsible for the technical operation and maintenance of the data warehouse infrastructure. Additionally, employees from various departments who are actively involved in the data warehousing project will also be considered as key stakeholders.

To gather comprehensive insights, the research utilizes methods such as surveys, interviews, and workshops to engage with stakeholders and solicit their views and suggestions. These interactions will help the research team identify and prioritize the key success factors that influence the DW deployment process. Examples of such factors could include clear project goals and objectives, strong leadership and support from senior management, effective communication and collaboration between stakeholders, sufficient training and skill development for end users, strict data governance policies, and appropriate data quality assurance measures.

The prospective outcomes of this research are twofold. Firstly, it aims to provide a comprehensive understanding of the key success factors that are critical to the implementation of data warehouses within an organization. These factors will serve as roadmaps and guidelines for decision-makers and project teams involved in similar initiatives, enabling them to tackle challenges and maximize their chances of success. Secondly, the research seeks to present a well-structured and reliable database with powerful data processing and display capabilities, which organizations can utilize for making informed decisions, strategic planning, and improving overall performance.
Demand forecasting and inventory management for an automotive tire distributor in Northeast Thailand
Authors:   , Chantaraponpun Vasinee
Published: September 2023

The objective of this research is to improve the inventory management for an automotive tire distributor company in Northeast Thailand to mainly reduce the excessive unnecessary stock. According to the initial investigations, the main causes of overstock are unstable customer demands and a lack of an inventory control system based on theory. In order to better address the issues and scope down the research area, three suitable products and sub-dealers with different demand patterns are selected to find the best-fit forecasting model for each of them and be customized the inventory policy based on the demand patterns. The methodology is divided into two main parts which are the demand forecasting model and inventory control policies for both sub-dealers and the company.

Regarding the development of more accurate demand forecasting models, there are six forecasting models which are three months moving averages, single exponential smoothing, double exponential smoothing, Holt’s winter method, linear regression, and ARIMA conducted to select the best model. The study reveals that Holt’s winter and ARIMA model provides the least forecasting errors as measured by Mean Absolute Percentage Error (MAPE).

According to a proper inventory policy and more accurate demand forecast value from the suitable model, sub-dealers and a company can save up to 47%, and inventory turnover increases by up to 80% while inventory holding days decreases by up to 55 days.
English absolute clauses in context of fiction: the study of unaugmented and augmented absolute clauses in Harry Potter and The Philosopher's Stone and Harry Potter and The Chamber of Secrets
Authors:   , Khaphaeng Chayapol
Published: September 2023

This study investigates the reasons for the different frequencies of unaugmented and the augmented absolutes. It also presents in-depth analyses on their syntactic, semantic, and pragmatic aspects in the context of fiction. The data were collected from Harry Potter and the Philosopher’s Stone and Harry Potter and the Chamber of Secrets, the first two books of the bestselling Harry Potter series. The findings of the study reveal that syntax, semantics, and pragmatics play an interrelated role in determining the way the absolute clauses appear in fiction. Syntactically, the structure of both unaugmented and augmented absolute clauses, with the majority of THEME subjects in one-place predicates, follows the Economy Principle by producing a concise, clear, and informative structure. Semantically, the unaugmented absolutes, with no introductory augmentor, have coreferences as a cohesive device to be semantically bound with their matrix clause of which the majority of subjects are part-whole coreference. With respect to semantic relations, weak adverbials are of the greatest majority in the data, while strong adverbials, the minority. The high productivity of weak adverbials in fiction is highly expected due to their ease of processing which could keep the attention and interest of the readers (Write Clearly and Concisely, n.d.). Strong adverbials, which are difficult to process for the target audience, meanwhile, are less preferred, and therefore infrequently appear in fiction. The semantic relations are also in relation to the frequency of the two types of absolute clauses. That is, unaugmented absolutes are prone to occur as weak adverbials, which are believed to keep readers’ attention in the context of fiction due to the ease of processing; they are thereby highly frequent in the data. Augmented absolutes, in contrast, tend to accommodate strong adverbials, which are more difficult to interpret and are not preferred in fiction; the augmented absolutes are therefore less frequent in the data. The coreferential property of absolutes also correlates with semantic relations; these correlations are in five patterns: PC and accompanying circumstance; NC and simultaneity; FC and elaboration; CC as implied coreference; and NC and strong adverbials. These correlations provide an in-depth understanding of how coreferences and semantic relations are related in the context of fiction. Regarding positions, both types of absolute clauses extensively appear in the final position, following the information structure of topic-comment, rather than the End-Weight Principle. The study concludes that the interplay of syntax, semantics, and pragmatics contributes to the production of absolute clauses which are economical but informative to keep readers’ attention in fiction.
An implementation of an integrated performance assessment module to promote English speaking ability and learning engagement of undergraduate students
Authors:   , Plengkham Benjawan
Published: September 2023

Integrating assessment with instruction has been a challenge for English language teachers, especially in English speaking courses. Therefore, it is crucial to incorporate instruction and assessment methodologies that can help enhance students’ speaking ability. The Integrated Performance Assessment (IPA), designed by the American Council on the Teaching of Foreign Languages (Adair-Hauck et al., 2015), is a cluster assessment consisting of three modes of communication, namely interpretive, interpersonal, and presentational, to seamlessly connect instruction and assessment as well as reflect how students use the language. This study was conducted to 1) investigate the effects of an IPA module on undergraduate students’ English speaking ability, 2) examine the effects of an IPA module on undergraduate students’ learning engagement, and 3) explore undergraduate students’ opinions of the implementation of an IPA module. This mixed-methods research employed a one-group pretest and posttest design to collect both quantitative and qualitative data. The participants were 33 undergraduate students majoring in English who enrolled in an English speaking course at a Thai public university. The research instruments included the pre- and posttests, unit tests, an IPA opinion questionnaire, a self-report questionnaire on learning engagement, and a semi-structured interview protocol. Three IPA modules were taught over nine weeks in the first semester of the academic year 2020. The quantitative data were analyzed using descriptive statistics of mean, standard deviation, percentage, and the paired-samples t test, while content analysis was used to analyze the qualitative data. The findings suggested that the implementation of three IPA modules had a positive effect on students’ speaking ability in an English speaking course. Moreover, this study provides positive evidence that implementing the IPA module into an English speaking course increased students’ levels of learning engagement in three dimensions: behavioral, emotional, and cognitive engagement. Students also revealed positive opinions on the implementation of the IPA module. This study highlighted the importance of the seamless connection between instruction and assessment, which dynamically enhances students’ speaking ability while engaging them in the learning process. Therefore, it can be concluded that the implementation of the IPA module could be an alternative instructional and assessment model that can effectively improve undergraduate students’ English speaking ability as well as increase their level of learning engagement.
Effects of salience and working memory on L2 processing of english relative clauses with past participles and past participial reduced relative clauses by L1 Thai learners
Authors:   , Thiamtawan Supakit
Published: September 2023

The present study explored effects of working memory (WM), structure, and salience on the processing of irregular past participial forms in English relative clauses (RCs) and participial reduced relative clauses (PRRCs) among L1 Thai learners. Based on Bayley’s research (1994), the salience in this study was related to phonological changes from the past tense form of English irregular verbs into their past participial form. The research included two groups of past participles with different salience degrees, i.e., an internal vowel change plus an addition of the syllabic [ən] morpheme and an internal vowel change plus an affixation of n. The research participants were seventy Thai undergraduate students with high English proficiency. The research instruments comprised a reading span task and a self-paced reading task. The reading span task was used to classify the learners according to WM degree into two groups: higher and lower WM groups. The self-paced reading task looked into the participants’ processing of the two past participial forms. The study hypothesized that the two participant groups with different levels of WM would manifest different fashions for online and offline processing. Moreover, the higher WM learners were predicted to take as similar amounts of reading time for RCs as their lower WM counterparts and spend more time reading PRRCs than the participants with fewer cognitive resources. The research findings partially supported the first hypothesis, but refuted the second hypothesis. That is, the distinction between the cognitive capacity levels of the two participant groups tended to affect their online processing, but not offline processing. This suggested that WM effects could depend on task types, which was consistent with the findings of Hopp (2015) and Zhou et al. (2017). Furthermore, the higher WM participants were more likely to read the two constructions faster than the lower span ones. The finding indicated that a high level of cognitive capacity could increase L2 learners’ speed of combining the upcoming with the preceding information (Just & Carpenter, 1992). This study made a contribution to L2 processing research by substantiating the dependence of WM impact on the task type as well as the relationship between L2 learners’ cognitive resources and their processing speed. The research also provided theoretical and pedagogical implications.
A study of students' reading engagement and perception of eil materials
Authors:   , Nakornsut Tayaporn
Published: September 2023

The popularity of English as an International Language has been rapidly growing, contributing EIL materials to have become more widespread in learning. This study discusses students’ reading engagement and their perception of EIL materials, which aims to (1) investigate students’ engagement in reading EIL materials, (2) explore student perception of EIL materials, and (3) explore the relationship between students’ level of reading engagement and their perception of EIL materials. 113 undergraduate students at one private college who use English as a medium for their instruction were participated in this study. A mixed-method study which Reading Engagement Questionnaire and EIL Perception Questionnaire were adopted and constructed to explore the findings and an interview protocol was designed to triangulate with the questionnaires’ findings.

The study revealed that students engaged in reading EIL materials in a neutral level and perceived EIL materials positively. Students possessed all four constructs of reading engagement in EIL materials: competence-related beliefs, task values, behavioral engagement in reading texts, and engaged readers. Furthermore, students perceived positively with four principles of EIL: current status of English, varieties of English, strategies for multilingual/multicultural communication and English reader’s identities. Interestingly, there was a positive relationship between students’ reading engagement and their perception of EIL materials.
Knowledge, attitude and practices on potato pest management of ethnic farmers in southern Shan state, Myanmar
Authors:   , Aung Pyae
Published: September 2023

Potato is cultivated as the main tuber crop which is essential for ethnic farmers’ household income in Southern Shan State, Myanmar. Most ethnic farmers use chemical pesticides widely to enhance crop yield and to control pests in the farm. The use of chemical pesticides could lead to a series of health impacts of the farmers and environmental issues. The main aim of the study is to explore farmers’ knowledge, attitude and current farm practices on pest management in potato production.  The participants of 100 farmers were chosen from each village with a cluster and purposive sampling technique using structured questionnaires to collect the data from a village in Kalaw Township. The finding showed that 72% of farmers use only chemical pesticides due to more effective and only 28% of the farmers used chemical and alternative methods. In the result, 15% of the Taung Yo ethnic farmers, 5% of the Pa-O, and 8% of the Danu are used alternative pest control methods (biological, physical and cultural pest control method). Physical and mechanical method is one of the most applied methods for the ethnic farmers in potato production. Most farmers received training from pesticide companies’ staff and whereas only 3% received information from governmental officials. Half of the farmers have moderate knowledge level on pest management. Most farmers have low attitude on biological and physical pest control methods in the study area. Marital status, type of farmland, farm experience and other crops plantation were significantly related to pest control methods in potato crop production. This study will help extension workers to provide appropriate training and improve farmers’ knowledge, attitude and practices of pest control management for the highland crop.
Development of high protein beverage from hydrolyzed egg white
Authors:   , Charoensak Nuntorn
Published: September 2023

The primary objective of this study was to examine the impact of enzymatic treatment on pasteurized egg white protein (EWP) and assess its influence on various physicochemical properties and antioxidant activity. Our findings revealed that the addition of SDAY10 enzymes led to a significant increase in lightness (L*), redness (a*), and yellowness (b*) parameters. Furthermore, higher concentrations of the enzyme resulted in a considerable reduction in pH, viscosity, and volume mean diameter (D4,3) of EWP protein compared to the control group (P < 0.05). Additionally, the application of SDAY10 enzyme (0.1-0.3% w/v) for EWP hydrolysis exhibited a noteworthy enhancement in antioxidant activity (measured by DPPH, ABTS, and FRAP assays) compared to lower enzyme concentrations. Notably, the 0.3% concentration of SDAY10 exhibited the highest release of amino acids during in vitro digestion and received the highest sensory evaluation score. Consequently, employing SDAY10 enzymes at a concentration of 0.3% w/v for EWP hydrolysis demonstrates significant potential for improving the physical properties of EWP and enhancing antioxidant activity. However, it is imperative to investigate the sensory evaluation with regards to the bitterness of the product developed using such enzymes.
Pore pressure prediction using combination drilling efficiency and hydro-mechanical specific energy methods
Authors:   , Otolomo Munawir
Published: September 2023

Several methods of pore pressure prediction using drilling parameters were introduced and improved to meet the challenges of accurate prediction at a relatively low cost. Knowledge of pore pressure is essential for safe well planning, cost-effective drilling, and operational decision-making. Conventional methods in pore pressure prediction using drilling parameters have limitations on its application of making the normal compaction trendline that is only applicable in clean shale intervals. In this work, the concept of drilling efficiency (DE) and hydro-mechanical specific energy (HMSE) for predicting formation pore pressure is proposed. This method, termed DE-HMSE, is based on the theory that the energy required to break the rock with the bit is a function of in-situ rock’s conditions during drilling. HMSE is the amount of axial, torsional, and hydraulic energy required to break and remove a unit volume of rock, and DE is defined as the ratio of the rock’s confined compressive strength (CCS) to the HMSE. The pore pressure prediction using DE-HMSE method is performed in two wells in Australia and three wells in Thailand. The results are compared to the actual measured pressure in the field and pore pressure prediction from conventional methods such as d-exponent, MSE, HMSE, and DEMSE methods. The results show that all the methods have inaccurate predictions of pore pressure in the depleted zone. However, the DE-HMSE method has the smallest root mean square (RMS) error and better agreement with the measured formation pore pressure compared to the other conventional methods.
Life cycle assessment of canned fish production in Thailand
Authors:   , Kraiwed Chanya
Published: September 2023

The canned fish industry is one of the world's most popular exports in Thailand. Moreover, the canned seafood industry ranks fourth in terms of energy consumption, which compares to all industry group (Wiriyatangsakul, 2021). Commercial competitiveness, on the other hand, must be improved because of the competitive conditions in the global market. Thus, this study evaluates the environmental performance of a factory in Samut Sakhon, Thailand, using Life Cycle Assessment (LCA) with Gate-to-Gate approach and setting functional unit by 1 ton fresh fish entering to process. The study used the SimaPro LCA application with the CML 2 baseline 2000 method, which covers ten impact categories. The result of LCA showed that human toxicity (3,800 kg 1,4-DB eq/ FU), global warming (2,470 kg CO2 eq/ FU), marine aquatic ecotoxicity (24,100 kg 1,4-DB eq/ FU), freshwater aquatic ecotoxicity (22.5 kg 1,4-DB eq/ FU), and terrestrial ecotoxicity (2.72 kg 1,4-DB eq/ FU) were found to have the greatest environmental impacts from 10 categories. Those categories are caused by packaging and steam consumption by 49% and 48%, respectively. Therefore, this study utilized clean technology to assess technical, economic, and environmental feasibility in order to prioritize resource consumption and propose options. The result showed that packaging, steam and water consumption were prioritized in the top three of CT, which was consistent with the LCA results except for water consumption. The following are some options for reducing packaging, water, and steam consumption: Use of packaging as primary packaging (glass, plastic, and recycled material) has the potential to reduce the environmental border to air by approximately 95% and the environmental border to water by 40 to 50%. (J. Laso, 2016). Steam consumption options are using biomass residue as a secondary combustion material in the production of steam could reduce CO2 eq by 38,308 kg CO2 eq/year, using wood pellet biomass could reduce CO2 eq by up to 33,311 kg CO2 eq/year, and improving boiler combustion by installing oxygen detectors could reduce CO2 eq by up to 19,149 kg CO2 eq/year. Water consumption options are reusing water in washing can packaging could reduce CO2 eq up to 2,003 kg CO2 eq/year, and Installing water high-pressure cleaner for washing floor could reduce CO2 eq up to 1,698 kg CO2 eq/year.
Assessment of greenhouse gases emissions from dairy cattle production in Thailand
Authors:   , Thu Phoo
Published: September 2023

Thailand’s agriculture sector plays a vital role in driving economic growth. Globally, livestock production is estimated to contribute about 18% of greenhouse gas (GHG) emissions. Despite its importance, there is a relative lack of research on GHGs assessment in the livestock sector in Thailand. The aim of this research was to estimate GHGs emissions from dairy cattle production in Saraburi and Ratchaburi provinces of Thailand. The 2019 Refinement to the 2006 IPCC guidelines for national greenhouse gas inventories was applied in this research. Twenty dairy farms (n=20) including both small farms (n=10) and medium farms (n=10) were selected as the case studies. The results revealed that total GHGs emissions from 20 farms were 138.83 kg carbon dioxide equivalent (kg CO2eq)  from all activities. Methane (CH4) emissions from both enteric fermentation and manure management were accounted for 98%. Nitrous oxide (N2O) emissions from manure management (both direct and indirect) and from manure applied to soil were only 1%. Small size of farms emitted GHG in the range of 3.82 to16.01 kg CO2eq (0.19 – 3.20 kgCO2 eq/head of cattle of GHG emission intensity (ET). Whereas, medium farms contributed GHG range from 2.74 and 4.22 kg CO2eq (0.09-0.19 kgCO2 eq/head of cattle of ET) from all activities. Farms in Ratchaburi emitted the emission in the range of 3.25-16.01 kg CO2eq per cow but farms in Saraburi contributed to total GHGs emission in the range of 2.74 - 4.07 kg CO2eq. Besides, ET range in Ratchaburi was 0.15-3.20 kg CO2eq and ET range in Saraburi was 0.09-0.21 kg CO2eq. By considering emissions activities, CH4 emission from enteric fermentation is much higher than those from manure management. By considering waste management in a dairy farm, as the manure solid storage system emitted higher emissions than the liquid/slurry system, it is necessary for farm managers and related stakeholders to properly manage the herds and farms to lower methane emissions, especially from manure management practices (i.e., installation of anaerobic digestion, composting, and manure drying practices, etc.). Besides, it is necessary to consider other factors that reduce emissions such as improving feeding quality and keeping good animal husbandry practices.
Water-use characteristics of Syzygium antisepticum and Adinandra integerrima in a secondary tropical forestin Khao Yai National Park for environmental management
Authors:   , Ampornpitak Ratchanon
Published: September 2023

Forests in Southeast Asia have been disrupted by widespread deforestation and land use change. Most countries in this region attempt to return the forested areas through reforestation. However, planting trees efficiently is difficult because changing environmental conditions and tree size could affect the water consumption of different tree-species under climate change. Hence, the information regarding water use characteristics of different tree-species in different tree size classes is important to the selection of tree species for reforestation. Nonetheless, available information on species-specific water-use characteristics is less investigated, especially in secondary tropical forests. To gain the information on species-specific water-use characteristics in secondary forests, we estimated tree water use (T) of dominant tree species including Syzygium antisepticum and Adinandra integerrima, hereafter Sa and Ai, respectively, in a secondary tropical forest at Khao Yai National Park Thailand using sap flow data from custom-made thermal dissipation probes and compare T of both species in different tree size classes. Specifically, we evaluated the responses of T of both species in large and small sizes to environmental factors including soil moisture and vapor pressure deficit (VPD) which represent soil and atmospheric humidity, respectively. Results of different soil moisture conditions in both sizes showed consistently higher T in Sa compared to Ai at across VPD ranges. Our results imply that Ai may be suitable for reforestation in the area where droughts frequently occur in the downstream ecosystem through its conservative water-use behavior and may benefit downstream ecosystems with increasing runoff from the forest during drought. Moreover, Ai has conservative water-use behavior regardless of tree size. Thus, Ai would still provide these benefits to ecosystems when they grow larger in the future. In contrast, Sa seems suitable for reforestation in the area with frequent floods because it has high water consumption during high water availability which may slow down runoff from forest into downstream ecosystems when storms come. However, mixed planting species seem to be suitable for reforestation in the area that extreme events do not frequently occur because both species can maintain their water use at moderate soil moisture regardless of tree size which prevent the depletion of soil water availability. This study highlights that the response of T depends on species and tree size. Such information would benefit the selection of tree species for reforestation that could adapt well to certain environments and support policy design on the management of tropical forests and natural resources. Depending on reforestation purpose, Sa and Ai may provide either benefits or negative effects to the ecosystems.
Impacts of the Thai canal on liner shipping container network
Authors:   , Yanpisitkul Krittitee
Published: September 2023

This thesis proposes a mathematical model that imitates the flow of containers in the container liner shipping network — particularly, in the Indo-Pacific region, where the Strait of Malacca is located — in order to assess the potential impact of the proposed Thai Canal on such a network. This model is constructed based on a combination of two network problems, namely (i) the Multi-commodity Minimum Cost Network Flow Problem (MCNFP) and (ii) the Liner Shipping Fleet Deployment Problem (LSFDP), which allows a more realistic representation of international trade, while taking to account congestion at container ports at the same time. We validate the resulting mixed-integer linear programming model (MILP) using information of the container liner shipping network in 2015, assuming that liners provide their services based solely on the costs. Based on our computational results, the resulting container flows from the proposed model seem to well align with the actual data at the country level — but with some differences at the port level, due to the posed assumption. Once validated, the model is then applied to a network configuration where the Thai Canal serves as an alternative route to the Strait of Malacca. We explore two distinct scenarios: in the first, the Thai Canal reduces transit time by 2 days;  in the second, we consider a scenario where the Thai Canal does not offer any transit time savings. Our experimental results indicate that, under both scenarios, the Thai Canal could instigate a substantial shift in traffic volume from the Strait of Malacca — leading to a significant decrease in port calls and transshipment operations of ports around the Strait of Malacca, particularly the port of Singapore.
Bitcoin candlestick price prediction with recurrent neural network
Authors:   , Simtharakao Sutiwat
Published: September 2023

Bitcoin is a high-risk asset with a potentially high return. Predicting Bitcoin candlestick, i.e., open, high, low, and close (OHLC) prices, can help investors make trading decisions. The objective of this study is to develop a neural network model to predict the candlestick prices of Bitcoin for the next period. Additionally, this study investigates methods to enhance the model's forecasting performance by feature transformations, specifically data normalization. This study employs two neural network algorithms, Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU), to forecast daily Bitcoin OHLC prices. To enhance the model's performance, we compare sliding window normalization with whole set normalization techniques. The normalization techniques investigated for both whole set and sliding window data include z-score normalization, min-max normalization, and relative change normalization. Furthermore, this study compares two candlestick prediction methods, namely using OHLC prices and using candle wick (CULR) to predict OHLC prices. The models use historical OHLC prices over several days to predict the next day's OHLC prices. The results indicate that the best-performing model is the OHLC method using GRU algorithm with sliding window z-score normalization, which achieves an MAPE of 1.95% and an RMSE of 767.71. Moreover, the sliding window normalization generally outperforms the whole set normalization for both LSTM and GRU models in terms of RMSE and MAPE. Regarding the candlestick prediction methods, there was no significant difference in their performance in terms of accuracy and forecasting error. However, our results suggest that the OHLC method performs slightly better than the CULR method.
The influence of K-pop Thai fan loyalty on the image of Korean male idol: a case study of Lim Youngmin
Authors:   , Wongsantimeth Nattanon
Published: September 2023

K-pop boyband artist AB6IX from South Korea, Lim Youngmin, has won the hearts of Thai fans that have developed into loyalness to him. However, Lim Youngmin has faced situations that affected the artist's idol image, and this resulted in the inability of performing as an artist in the meantime, from an incident in 2020, after being arrested for DUI - driving under the influence of alcohol. He had his driving license revoked in the same year which might force him to decide to enlist himself in the military, which is a requirement for all male citizens of South Korea without exception. All the situations fans have faced are proof that they are loyal fans and are satisfied by the activities that Lim Youngmin has accumulated thus having the confidence to support Lim Youngmin. Furthermore, this thesis will analyze the factors that affect the satisfaction of loyal fans through two methods. Firstly, an in-depth interview with two fans, namely a Twitter fan page administrator and a loyal fan of Youngmin for over five years. Secondly, by analyzing the results of the answers from a fan questionnaire taken by 400 people. This research is likely to open up more or less perspectives on fans' loyalty toward artists.
'Gangnam beauty' drama: the representation of lookism in South Korea
Authors:   , Arum Nindya
Published: September 2023

Lookism is a new concept related to the discrimination. It is often described as a physical attractiveness discrimination, where as individual that is up to the beauty standard and considered as attractive are being treated differently than those who is considered ‘unattractive’. The purpose of this study is to analyze the lookism in the daily life in ‘Gangnam Beauty’ drama and how the beauty standard reflected in the daily life can be toxic to certain points using the representation theory of Stuart Hall and the critical discourse analysis to analyze the data through scenes, dialogues and characters. The result of this study shows how the drama ‘Gangnam Beauty’ represented the lookism in daily life and how lookism manages to put pressure on people regarding their appearances. The message of how badly lookism can affect an individual and how it has been overlooked by people due to the beauty standard in the society are well represented through the dialogues and the scenes in the drama.
The portrayal of queerness in Lee-Song Hee-Il's films through intersectional lens
Authors:   , Sangpetch Tanin
Published: September 2023

This research investigates the representation of queerness and how individuals' different social identities produce different kinds of tensions among queer people through the concept of intersectionality. The research analyzes the film No Regret, White Night and Night Flight. The analysis includes two themes: 1) The Violence and Harassment against Queer and 2) The Representation of Gender and Sexuality. The study seeks to understand how intersecting components are represented along with the two themes. The result of the study reveals that queers who have a good academic performance or high SES seem to bear much pressure and high expectation to maintain their status or achieve upward social mobility, so it is difficult for them to express their identities freely, because queerness is in conflict with Korea’s traditional gender norms. Besides, queers who are considered as less masculine are targeted to be sexual assault victim. This leads to the difficulty of identity expression among queers and some of them have to act differently from who they are, to avoid being victims of dehumanization. In conclusion, this study argues that social status and hegemonic masculinity lead to different levels of intolerance of queerness in the context of Korean society.
Analysis of expression patterns of brassinosteroid-responsive genes in arabidopsis root using single-cell RNA sequencing datasets
Authors:   , Wongkham Thanaporn
Published: September 2023

Brassinosteroid (BR) plays a complex role in root growth and development by regulating the expression of downstream target genes through the BR signaling pathway. In this scRNA-seq study of Arabidopsis roots, tissue- and developmental-specific roles of BR were identified. Atrichoblast, an epidermal cell that develops into a non-hair cell, displayed the highest enrichment of BR-induced genes in the elongation and maturation zones among all cell types. Trajectory analysis revealed distinct expression patterns of BR biosynthesis and signaling genes between atrichoblasts and trichoblasts. Atrichoblasts exhibited higher expression levels of BR biosynthesis genes (DET2 and ROT3) and BR signaling genes (BRI1 and BSK1) during elongation and maturation stages compared to trichoblasts. This suggests that the higher levels of BR and BR signaling activity in atrichoblasts likely contribute to their larger percentages of BR-induced gene expression. Gene ontology analysis further revealed differences in BR-responsive gene sets related to cell wall processes between the two cell types. Specifically, EXTs that are BR-repressed genes showed specific expression in trichoblasts at the maturation stage, while XTHs that are BR-induced genes displayed higher expression in atrichoblasts during the elongation and maturation stages. Additionally, the validation of candidate genes on additional single-cell datasets supported the consistency of the findings and highlighted the significance of specific cell wall-related genes in determining atrichoblast fate.
The cardinality of the permutations on a set with n non-fixed points
Authors:   , Nuntasri Jukkrid
Published: September 2023

In this thesis, we study relationships between |Sn(A)|�and |seqn1-1(A)|�as well as |seqn(A)|�for infinite sets A, where Sn(A)�is the set of permutations of A�with n�non-fixed points and seqn(A)�and seqn1-1(A)�are the set of�sequences and the set of one-to-one sequences of elements of A�with length n, respectively, where n�is a natural number greater than 1.

With the Axiom of Choice (AC), |Sn(A)|, |seqn1-1(A)|, and |seqn(A)|�are equal for all infinite sets A. Among our results, we show, in the Zermelo-Fraenkel set theory (ZF), that |Sn(A)|<=|seqn1-1(A)|�for any infinite set A�under some weak form of AC and the assumption cannot be removed. In the other direction, we show that |seqn1-1(A)|<=|Sn+1(A)|�for any infinite set A�and the subscript n+1�cannot be reduced to n. Moreover, we also show that "|Sn(A)|<=|Sn+1(A)|�for any infinite set A"�is not provable in ZF.
Development of stiffness sensing and adaptive grasping with soft pneumatic grippers
Authors:   , Sithiwichankit Chaiwuth
Published: September 2023

This study presents a framework for stiffness sensing and adaptive grasping using soft pneumatic grippers (SPGs). The motivation was to imitate the capabilities of human hands. The challenge was the compliance of soft pneumatic actuators (SPAs). The study associated the behaviors of grasped objects with those on SPAs, introduced a new concept of SPA modeling, and proposed a method for stiffness sensing through SPG pincer grasping. Compression testing was conducted for validation. A technique for forecasting deformation and force on grasped objects based on their stiffness was established, and a control law was elaborated. The presented technique and control architecture were validated at different input pressure conditions. The proposed method yielded similar stiffness trends with slight deviations compared to compression testing and demonstrated the potential for manual classification of samples. The presented technique provided small deviations in deformation but significant errors in force. A major limitation was caused be the using of computer vision for inspecting SPA deformation. To overcome this limitation further studies on the direct sensing of SPA deformation is recommended Overall, this study contributes to the field of soft robotics and object classification by integrating stiffness sensing and SPG grasping in a single action, leading to the next level of adaptive SPG grasping.
Generation of tolerogenic dendritic cells from Fcgr2b deficient lupus-prone mice for the model of SLE therapy
Authors:   , Khiewkamrop Phuriwat
Published: September 2023

Tolerogenic dendritic cells (tolDCs) are DCs with an immunoregulatory function, which can induce regulatory T cells (Tregs) and suppress the immune response. Currently, tolDCs-based treatment has become a promising therapeutic approach for organ transplantation and autoimmune disease. FcgRIIB is an inhibitory receptor widely expressed in B cells, myeloid cells, and DCs. The ablation of FcgRIIB in the murine model shows a spontaneous development of a lupus-like disease and might affect other immune cell regulation. There was limited information on tolDC induction in FcgRIIB defective mice. Thus, in this study, we studied the generation of tolDCs from the bone marrow-derived dendritic cells (BMDCs) of Fcgr2b-/- mice by various tolerogenic agents. As expected, when compared with wide-type (WT) control, bone marrow-derived DCs of Fcgr2b-/- mice showed higher activation and pro-inflammatory cytokine productionupon LPS stimulation when compared with wide-type (WT) control. Tolerogenic agents can partially reduce the activation and cytokine production of LPS-stimulated Fcgr2b-/- BMDCs. Mainly, dexamethasone-treated Fcgr2b-/- BMDCs exhibited a notable decrease in pro-inflammatory cytokine production and showed an increase in IL-10 production in response to LPS stimulation. Furthermore, we demonstrated that dexamethasone-conditioned Fcgr2b-/- tolDCs could mediate Treg expansion ex vivo.

For the in vivo treatment of lupus disease, dexamethasone-conditioned Fcgr2b-/- tolDCs were adoptively transferred to Fcgr2b-/- lupus-prone mice, mediated Foxp3+ Treg expansion in the spleens and suppressed anti-double strand DNA autoantibodies in the serum. In addition, to generate tolDCs in vivo more conveniently, dexamethasone-loaded nanoparticles (DexaNPs) designed to target DCs were subcutaneously injected into Fcgr2b-/- lupus-prone mice. The DexaNPs-treated mice showed a significantly enhanced expression of PD-L1 on CD11c+ DCs, increased FoxP3+ Treg numbers, and decreased serum anti-double strand DNA autoantibodies. 

                  In conclusion, our study demonstrated that dexamethasone is the most potent drug that can induce tolerogenic DCs and lead to better clinical outcome in Fcgr2b-/- lupus-prone mice. This may be helpful for DC-based treatment in SLE patients but not limited to FcgrIIb gene polymorphism.
The Inhibitory Effect of combined human cathelicidin with antibiotics on antibiotic-resistant Cutibacterium acnes
Authors:   , Sriharat Rakwaree
Published: September 2023

Cutibacterium acnes is one of the major factors involved in the pathogenesis of acne vulgaris which sometimes develops antibiotic resistance particularly clindamycin- and doxycycline-resistant C. acnes. In this study, human cathelicidin (LL-37) which is a type of human antimicrobial peptide against a wide range of microorganisms was used. We investigated the antimicrobial activity of LL-37 on C. acnes isolated from patients with acne at the King Chulalongkorn Hospital using broth microdilution. Moreover, the synergistic effects of LL-37 with clindamycin and doxycycline were investigated using checkerboard microdilution, and time-killing assays. The cytotoxicity of LL-37 was also evaluated by MTT assay. The results demonstrated that LL-37 had an inhibitory effect against all clinical isolates of a C. acnes including antibiotic-resistant strain at concentrations ranging from 25 to 50 µg/ml. Furthermore, LL-37 at the concentration of 0.1µg/ml showed a synergistic effect with doxycycline at the concentration of 8 µg/ml with the fractional inhibitory concentration index (FICI) of 0.50. However, the combination of     LL-37 and doxycycline showed a significant cytotoxic effect on human keratinocytes. Therefore, better understandings how to reduce the cytotoxicity of this drug combination are required, and the synergistic effect of LL-37 with other topical antibiotics is probably needed.
High-pressure study of hybrid organic-inorganic perovskites and double perovskites
Authors:   , Ardimas Ardimas
Published: September 2023

Hybrid and double perovskite have been of great attraction for optoelectronic devices. However, exploring a feasible method to enhance their optical abilities remains a considerable challenge. Here, the researcher reports the pressure-induced phase transition as an effective way to modify optoelectronic properties. The researcher successfully synthesized the hybrid perovskite (MAPbI3) and the double perovskite (Cs2TiBr6) by the inverse temperature crystallization (ITC) and solution method, respectively. the researcher studied the pressure dependence phase transition and photoluminescence (PL) by placing the sample into diamond anvil cells (DACs) through Raman spectroscopy. The first principles method was used to support the idea. The researcher observed at least 3 phase transition of MAPbI3 under hydrostatic compression up to 5.34 GPa. The transformation from dynamic to static phases occurs at 3.26 GPa. The static phase shows the disappearance of organic CH3NH3 vibration. The researcher also observed the structural deformation of Cs2TiBr6 by a similar method. However, Cs2TiBr6 exhibit a distinct phase transition under high pressure of 11.9 GPa. New Raman peaks of octahedral TiBr6 indicate high interaction and indicate the evolution from alpha phase to beta phase. Subsequently, the emission undergoes a red shift and a significant broadening under further pressure up to 12.6 GPa.
Improving quality of CVD graphene grown on the copper foil by physical polishing electropolishing and thermal annealing pretreatment processes
Authors:   , Sirisom Methawut
Published: September 2023

This study optimized the pretreatment processes (physical polishing (PP), electropolishing (EP), and thermal annealing) for high-quality graphene growth on thin copper (Cu) foils. PP using Brasso solvent was applied to smoothen the substrate surface, followed by EP with H3PO4 to reduce rolling lines and surface contamination. The EP process involved different H3PO4 concentrations (30-60%) and etching times (60-120 seconds). After thermal annealing at 860-940 ºC, graphene growth was performed using direct-liquid-injection chemical-vapor deposition with cyclohexane (C6H12) as the carbon precursor and nitrogen as the carrier gas. The optimized conditions involved PP and EP with 45% H3PO4 concentration and 90 seconds etching. At an annealing temperature of 900 ºC, monolayer graphene was successfully formed. Lower cyclohexane flow rates enhanced graphene quality, achieving monolayer films with an I2D/IG ratio of 2.76 for a 10-minute growth. By optimizing growth conditions, the graphene film properties were improved. These findings highlight the importance of annealing temperature and cyclohexane flow rates in controlling graphene film quality on Cu foils, providing valuable insights for graphene synthesis in various applications.