bluuebunny/crossref_metadata_2025_split huggingface dataset:
The development of an ar-quest instructional design model based on situated learning to enhance the ability to remember Khmer vocabulary of Thai undergraduate students
Authors:   , Eang Norphealey 
Published: September 2023

This study employed a research and development, which was conducted with the purposes 1) to develop AR-Quest Instructional Design Model to enhance the ability to remember Khmer vocabulary of Thai undergraduate students and (2) to investigate the effect of the AR-Quest Instructional Model on learners’ Khmer vocabulary ability. The subjects in the model development consisted of six experts from the fields of the instructional design model, educational technology, and Khmer language teaching. The participants for the model experiment were thirty undergraduate students. The research instruments consisted of a Khmer vocabulary ability test, KhAR application (Khmer AR-Quest mobile application for Android), and a lesson plan. The data-gathering instruments consisted of a pretest and a posttest. The students’ scores from both the pretest and posttest were compared using paired sample t-test.

From extensively and systematically reviewing and commenting from experts to polishing through trying out, it brings about the components of the AR-Quest instructional design model that consist of four major components which are 1) Analysis, 2) AR Quest Development, 3) AR Package Development, and 4) Instructional Development. The Khmer vocabulary ability score of the posttest of the students suggested a higher score than the pre-test showed a difference at .05 level of significance.
Grid-friendly dispatch strategy of PV generation system with battery energy storage
Authors:   , Srisontisuk Sarute 
Published: September 2023

High PV penetration reduces stability tolerance due to the lower of system inertia and system ramp capability. To handle higher PV penetration issues, the system operator and PV owners should consider the operation improvement. For the system operator, critical system ramp capability with respect to PV penetration ratio can be useful to determine the lower bound of system ramp capability for handling N-1 contingency and expected disturbances. In the case study, test results reveal that the system can operate securely with PV penetration ratio up to 40%, in which it will require system ramp capability in the range of 0.05-0.09 p.u./min. In such case, when magnitude ratio of expected disturbance of aggregated PV output power is kept below 0.3, it will not need to impose a PV ramp limit on an individual PV plant. For PV owners, the grid-friendly dispatch strategy can partly compensate decreased revenue from energy payment by additional revenue from load frequency regulation ancillary service. Furthermore, the proposed method avoids unnecessary PV energy curtailment by providing load frequency regulation and frequency support, and avoids battery energy storage degradation by using internal active power reserve for frequency support component, instead. Overall, in so doing, system frequency security can be improved by 16.6%, when PV performance achieves day-ahead scheduled power compliance index at 94.3 % and load frequency power compliance index at 73.88%, respectively.
Assessing Feasibility of Water Accounting Toolkit for in a Poultry Processing Plant
Authors:   , Silabhusith Kantinant 
Published: September 2023

In this project, we will be looking into the use of a toolkit called water accounting as applied to a food processing plant and determine its effectiveness as a toolkit for monitoring water usage in a factory. The main objective of this thesis report is to 1. Recommend reducing water consumption by applying the water accounting toolkit. 2. Provide a standardized tool for the case study company to measure their sustainability progress and communicate that information clearly. This report will also discuss the extent in which the company can reduce their water consumption and their various methods in which to do so. In order to fill out the water accounting toolkit, the information regarding the flow of water into the different components of a compound factory must be considered. In this case the different components are as follows. 1. Duck Slaughter House, 2. Chicken Slaughter House, 3. Duck Processing Plant, 4. Chicken processing plant 1 and 2. We will be determining the flow of water going through each of the different components to determine which process takes up the most amount of water and potential ways in which to reduce the water consumption. It is determined that the slaughter houses take up the most amount of water; namely the duck slaughter house so in order to reduce it. It has been calculated that approximately 48,000 m3 of water is being used in the production process each day while only approximately 11,600 m3 of water can be found in the final product. There are many ways in which to reduce the water consumption of the factory, 1. Increase the number of water treatment facilities 2. Consistently update the water usage table 3. Purchase new technology that reduces water usage. 4. Change policy regarding maintenance and cleaning. 5. Educating employees regarding water management. Water accounting has many benefits and limitations to their use. Firstly the benefits are that it is extremely beneficial to communicate difficult concepts and process large amounts of information. It can be easily audited and traced. Whereas the disadvantages is the difficulty in implementing this toolkit to a factory; it requires someone with knowledge about how this model works and what information goes where. However, after implementing it should be easy to maintain as information can be readily fed into it.
Out-of-class language learning strategies of Thai university students during participant in the summer work and travel program
Authors:   , Thanasumbun Thunyaporn 
Published: September 2023

It has long believed that in-class instruction alone is not sufficient to promote language skill development of second and foreign language learners, so spending time during school break in a country where the target language is spoken is one way to further increase their language proficiency outside classes. The present study aimed to investigate out-of-class language learning strategies and intercultural competence skills of 353 Thai undergraduate students who participated in the Summer Work and Travel Program in the United States in the year 2018. Quantitative data were collected using the Strategy Inventory for Language Learning (SILL) developed by Oxford (1990) and the Exploring and Assessing Intercultural Competence survey form Fantini and Tirmizi (2006). In addition, a semi-structured interview protocol was employed to elicit in-depth qualitative data from ten participants who met the inclusion criteria. The study findings revealed that the participants’ frequency of use of learning strategies was at a medium to the high level, especially social learning strategies. Furthermore, while performing their work with others from different cultures, their intercultural competence skills were simultaneously developed. It is recommended that language teachers develop a training program to equip prospective program participants with necessary understanding of out-of-class language learning strategies and intercultural knowledge and skills to enable them to more confidently and effectively handle language barriers and cultural differences, hence more likelihood to find their participation in the Summer Work and Travel Program more beneficial and fruitful.
Characterization of bacillus isolates using whole genome sequencing analysis and application as a potential food probiotic
Authors:   , Khullar Gauri 
Published: September 2023

Whole-genome sequencing (WGS) performed to evaluate potential probiotic properties of Bacillus species (6-2, 63-11 & 78-1) pre-reflecting antimicrobial properties, identified them as Bacillus velezensis (98.16%), Bacillus infantis (91.21%) and Bacillus amyloliquefaciens (99.06%) respectively. It also predicted K-mer resistance to cfr(B) and tet(L) proteins (6-2 & 78-1); bacteriocin and metabolite synthesis (6-2 & 78-1), terpenoid gene (63-11); hemolysin III (6-2 & 78-1) and hlyIII homolog (63-11); extracellular protease (6-2 & 63-11) and cell-bound protease (78-1) genes. WGS gut adaption F1F0 ATP, chaperonin (groEL, groES) and general stress response proteins (DnaK); EAL domain protein (biofilm), flagellin synthesis, and putative integral membrane proteins (63-11 & 78-1) were also annotated. The in-vitro assessment demonstrated a significant effect on growth and performance under gastric (78-1) and bile acid conditions (63-11) along with high hydrophobicity to chloroform (6-2) and xylene (63-11 & 78-1). It also reflected moderate (6-2 & 78-1) to high (63-11) susceptibility towards Ampicillin, Chloramphenicol and Tetracycline, and moderate (63-11) to high (6-2 & 78-1) antagonistic effects towards pathogens, with no hemolytic activity (except 78-1). Based on the findings of both the tests, this study provides enough evidence to support the potential benefits and commercial applications of Bacillus species, with B. infantis (63-11) being the most potential probiotic candidate.
Fructooligosaccharide synthesis by immobilized inulosucrase from lactobacillus reuteri 121 and improvement of product pattern using site-directed mutagenesis
Authors:   , Charoenwongpaiboon Thanapon 
Published: September 2023

Inulin-type fructooligosaccharides (IFOS) are well-known prebiotics which can be produced from sucrose using bacterial inulosucrase (E.C. 2.4.1.9). However, the use of inulosucrase for IFOS synthesis has some limitations because it also synthesizes some polysaccharides and exhibits lower stability than the fungal enzymes. To overcome these limitations, improvement of inulosucrase was made by using enzyme immobilization and enzyme engineering. First, inulosucrase from Lactobacillus reuteri 121 was immobilized on a novel, high capacity core-shell chitosan beads using glutaraldehyde as a cross-linker. The results showed that both immobilized and free inulosucrase had the same optimum pH (5.5), while the optimum temperature was shifted from 50 to 60°C. In addition, the immobilized biocatalyst was more stable than the free enzyme, and could be reused for at least 12 cycles. The product pattern of inulosucrase was then improved by site-directed mutagenesis. Product characterization revealed that the mutation essentially affected the degree of polymerization (DP) of IFOS. Finally, the selected mutated inulosucrase (R483A) was immobilized bycross-linked enzyme aggregates (CLEAs). This CLEAs exhibited excellent pH and themostability compared to that of the free enzyme. This study not only provides the novel enzyme producing oligosaccharides, but also renders the information about structure-function relationship and product formation mechanism of inulosucrase.
Neotectonics and pale earthquakes along Mae Hong Son Fault, northern Thailand
Authors:   , Chansom Chanista 
Published: September 2023

Mae Hong Son Fault (MHSF) is a north-south-trending active fault in Northern Thailand. Last earthquake occurred on February, 1975 with a magnitude of 5.6 at Ban Tha Song Young in Tak Province. This study aims to describe morphological characteristics of MHSF using high (12.5m) resolution Digital Elevation Model (DEM) and to evaluate paleoearthquake magnitudes, recurrence intervals, and slip rates of MHSF by excavating paleoearthquake trenches. According to morphotectonic analysis, offset streams, linear valleys, triangular facets and scarplets were formed as a result of dextral movement within the active fault zone. There are two separate basins associated with the MHSF, which include the Mae Hong Son Basin to the north and the Mae Sariang Basin the south. Between these basins, fault displacements decrease towards Khun Yuam area suggesting a linkage zone in the Mae Hong Son strike-slip fault systems. Surface rupture length investigation from fault segments in both basins indicates maximum credible earthquake between M5.8 - M6.3. Nine paleoearthquake events were identified in Mae Hong Son Province based on trenching and road-cut outcrop studies, and optically stimulated luminescence (OSL) dating. The OSL ages of the events are 78,000, 68,000, 58,000, 48,000, 35,000, 30,000, 25,000, 8,000 and 3,000 years ago. The recurrence interval of earthquake events on the MHSF appears to be ca. 5,000 years, and the slip rate was estimated as ca. 0.04–0.15 mm/yr.
Petrography and Geochemistry of volcanic rocks in Khao Sam Sip area, Sa Kaeo Province
Authors:   , Sriwichai Maythira 
Published: September 2023

The volcanic rocks at Khao Sam Sip, Sa Kaeo province is part of the Loei-Phetchabun-Sa Kaeo Volcanic Belt. Based on field observation, petrographic and geochemical studies, the rocks in the study area can be divided into four rock units namely, 1) Basalt-andesite unit, 2) Polymictic andesitic unit, 3) Epiclastic unit, and 4) Clastic unit. Unit 1 is the lowest unit in sequence consisting of olivine-pyroxene-plagioclase basalt, pyroxene basalt, hornblende-plagioclase andesite, and plagioclase andesite. Unit 2 consists of polymictic andesitic breccia and polymictic andesitic sandstone. Unit 3 is epiclastic unit comprising of crystal-lithic sandstone and polymictic conglomerate. Units 4 includes fine-grained clastic rock and limestone.

In the geochemical study, the basalt-andesite unit was selected for geochemical analyzes including major, trace and rare earth elements. They are ranging in composition of trachyandesite and alkali basalt with few rhyodacite, andesite, and basanite and classified dominantly as alkaline affinity. Based on the results of trace elements and REE abundances, the rocks can be subdivided into four groups. All four groups have similar chemical characters of enrichment in high field strength elements (HFSE) and light rare earth elements (LREE) with distinct negative Eu anomalies, and this may suggest the rocks were formed by Early Triassic fractionated magma of volcanic arc system as a part of Loei Fold Belt. Gold has not been identified during this study. It could have occurred as refractory gold (in pyrite structure) or nano-size particles included in sulfide minerals. However, copper-rich veins/veinlets are hosted in coherent volcanic rocks and they may represent either skarn or epithermal style mineralization.
Reconstruction of sea level fluctuation and environmental change in Khao Sam Roi Yot National Park, Changwat Prachuap Khiri Khan during the late holocene
Authors:   , Nudnara Worakamon 
Published: September 2023

The Gulf of Thailand is generally provided the efficiency evidences of sea level fluctuation according to the lack of tectonic events. Sam Ro Yot National Park (SRY) is located in the west coast of the Gulf of Thailand with its elevation approximately at sea level. Sedimentary sequences from SRY wetland has been obtained. This sedimentary sequence can be divided into 3 units, comprised dark grey silty to sandy clay of unit A, beige clay of unit B, and gyttja sediment of unit C. An intensive analysis was focused on core CP-4 because it is the longest core and compose of all sedimentary units. Environmental reconstruction was accomplished by pollen analysis, grain size analysis, Loss on Ignition (LOI) and radiocarbon dating. This area was under intertidal environment and dominated by Rhizophora-mangroves since c. 3500 - 1700 cal year BP with a temporary dry conditions at c. 3300 cal year BP. Mangrove subsequently transferred to back mangroves at c. 1700 – 1600 cal year BP according to sea level regression. A minor transgression occurred later at c. 1600 – 1000 cal year BP, displaced this area by Avicenia-mangroves. Thereafter, mangrove zonation was prograde seaward due to the second regression, effected this area prominent by back mangroves at c. 1000 - 400 cal year BP. Freshwater wetland was finally replaced from c. 400 cal year BP to present.
Microshear bond strength and microleakage of glass ionomer cement on aged dentin
Authors:   , Techa-ungkul Chutima 
Published: September 2023

Objective: To compare the microshear bond strength and microleakage of glass ionomer cements when bonded to aged and young dentin.

Background: Root caries commonly occurs in elderly patients. Glass ionomer cement (GIC) is frequently used to restore root caries. Many studies of GIC have been conducted using young dentin, however few studies have assessed adhesion and microleakage of GICs to aged dentin.

Materials and methods: Seventy-eight non-carious human molars (patient age 16-30 = 39; patient age ≥ 65 = 39) were tested with three commercial GICs (Fuji II LC, Equia Forte Fil, and Fuji BULK). For microshear bond strength (µSBS), teeth were horizontally sectioned and embedded in resin and three tubes attached to the sectioned surface. Materials were mixed and injected into the tubes, allowed to set and the tubes removed leaving the GIC cylinders. Specimens were stored in deionized water for 24 h at 25°C and subjected to a shear force in a universal testing machine. For microleakage, a buccocervical cavity was prepared, restored with GIC, and stored in deionized water for 24 h at 25°C. The specimens were polished, coated with nail varnish, placed in 0.5% basic fuchsin for 24 h, sectioned at the midpoint and evaluated for microleakage under a stereomicroscope and scanning electron microscope (SEM).

Results: For µSBS, Fuji II LC showed the highest bond strength among all three products (young dentin, 7.29 MPa; aged dentin, 8.59 MPa; P < 0.001). There was no significant difference between age groups. For microleakage, Fuji II LC had more dye penetration (P < 0.01) and there was significant difference between age groups. (Occlusal: P = 0.007, Gingival: P = 0.02)

Conclusion: After bonding of GICs, aged dentin showed no difference in µSBS but less microleakage when compared to young dentin.
Oral Health-related Quality of life and related factors in the elderly patients who received dental treatment
Authors:   , Tatiyapongpaiboon Teerawut 
Published: September 2023

This thesis is a cross-sectional study which explores underlying determinants of elderly patients. The study examines related factor that impaired Oral Health-related Quality of life (OHRQoL) and analyzes the characteristics of elderly patients at our clinic. 46 participants are patients who completed dental treatment more than 6 months during May 2016 to December 2018. Underlying determinants information were recorded by interview, patient chart review and oral examination. There were collected self-evaluation and Oral Impacts on Daily Performances (OIDP). Descriptive statistics was used to describe the characteristics of patients. Spearman correlation and Kruskal-Wallis test at P-value < 0.05 were performed. From the results, the participant’s OIDP scores showed the majority in no severity and no more than 2 impacts activities. The major activities that were impacted were eating activity and speaking activity due to ill-fitting dentures but less impacts in psychological and social performance. There was poor denture satisfaction that impaired participant’s OHRQoL. However, there were differences between dentist and patient evaluation. The authors suggest that the dental treatment should focus on the recall system, the frequency of dental recall visits, procedures to successful oral hygiene instruction and skills to handle the denture problems.
Offshore crew boat sailing time prediction models
Authors:   , Chongterdtoonskul Atiporn 
Published: September 2023

In this study, the relationship between travelling time of crew boats and the potential related factors was studied to improve prediction model for travelling time calculation. According to lack of data analysis, the existing calculation method had very high forecast error for crew boat’s morning route which is the main route for boat A and boat B. The selected variables were total distance and boat speed as internal factors while using significant wave height, wave direction, wind speed, and wind direction as external factors. 2017-2019 data were used in this analysis by dividing into 2017-2018 as train and validate data. Moreover, 2019 data was applied as test data for model evaluation of the optimal prediction model. Those input variables were analyzed with various regression models (Multiple linear regression, Stepwise regression, Partial least squares regression, Lasso, and Elastic net regression) using two different datasets of 1st order and 1st order with Interaction terms to find the optimal model for boat A, boat B, and combined boat. The performance of the forecasting models was compared using MAPE. The models were developed to forecast sailing time for short-term and long-term period.

Elastic net regression model provided the lowest MAPE for all boats both short-term and long-term prediction. 1st order dataset is appropriate for short-term prediction, yielding MAPE of 5.55% for boat A and 7.43% for boat B. Moreover, the significant input variables for short-term model are total distance, boat speed, significant wave height, wave direction, and wind speed. On the other hand, boat A’s equation obtained the lowest MAPE of 8.51% and 10.09% for boat B for long-term model with 1st order with interaction terms dataset. The predictors that have effect for all boats were total distance, boat speed, and wave direction with interaction between boat speed and wind direction. After model re-evaluation with new dataset (2019), it was found that the developed models are suitable for travelling time prediction and will enhance efficiency for overall crew boat operation for AA company.
Reducing the defects of a-pillar stamping partin automotive assembly process
Authors:   , Rojpitinithikorn Hassakorn 
Published: September 2023

The goal of this research is to minimize defects in the process of automotive assembly. Regarding the one-year defect and value; the biggest defect cost come from portion of the A-Pillar stamping parts. Therefore, by using Failure Mode and Effect Analysis (FMEA) to examine it and perform experiments using the Design of Experiment (DOE), we investigated the production process as well as figuring out the cause of the problems that happen in the stamping process. The results found that the issue arose from the design of stamping die, which is the risk of springback problems of parts, is not good enough to make a huge parts. Once the stamping process has been improved by adding re-strike die; the quantity of defects from 492 cases is expected to be zero and the defect cost amount of 27 million Thai Baht per year is saved. The process capability Cpk of position A10 and A11 has improve from 0.05 to 0.90 and 0.03 to 0.92, respectively.
A development of family continuity management for medical staffs based on business continuity management
Authors:   , Charoenthammachoke Kananut 
Published: September 2023

Nowadays, the Business Continuity Management (BCM) is one of the most effective programs to reduce impact from crisis, incident, or any disaster for organizations focusing on their continuity operations. In addition to handling the incident which disrupts or interferes the business processes, the BCM has been developed into a new term of strategy like “resilience." The purpose of this research is to develop and implement the BCM framework program for family. In this study, the proposed “Family Continuity Management" (FCM) program training was conducted for 51 medical staffs. There are 10 phases in the FCM training program experiment. The samples gave their opinions to this study for future program improvement through face-to-face interview after FCM training program. Finally this study establish guides and suggestions for the FCM program future improvement.