Journal of science and technology RMUTSB

A COMPARISON OF TIME SERIES MODELS FOR FOOD POISONING CASES

Sawita tongkunwong — Tue, 02 Sep 2025 00:00:00 +0700

ABSTRACT

Food poisoning is caused by consuming contaminated food or drinks that contain bacteria, viruses, or parasites. Predicting the number of food poisoning cases can help in planning and setting effective policies to prevent the spread of the disease. This study aims to compare four time series forecasting models: AR(p), MA(q), ARMA(p,q), and ARIMA(p,d,q), using weekly data on food poisoning cases from Health Region 9 over 53 weeks. The models were evaluated using the Mean Absolute Percentage Error (MAPE).

The results showed that the ARIMA(1,2,1) model was the most suitable for forecasting food poisoning cases in Health Region 9, with a MAPE of 16.20%.

Keywords: Food poisoning; Time series; ARIMA model

Article RISK FACTORS AND PREVENTIVE MEASURES FOR HEAT-RELATED ILLNESSES IN OUTDOOR SPORTS AMONG STUDENTS: A CASE STUDY OF WAT NONG YAI SCHOOL, SAIMAI DISTRICT, BANGKOK

Thitsanu Phokabunyanon — Tue, 02 Sep 2025 00:00:00 +0700

This study aims to analyze risk factors contributing to heat-related illnesses during outdoor sports activities among lower secondary school students at Wat Nong Yai School, Saimai District, Bangkok, and to propose appropriate preventive measures for students in medium-sized schools. A mixed-methods research design was employed, combining data collection through questionnaires and in-depth interviews.

The study sample consisted of 150 lower secondary school students selected using stratified random sampling and 10 students for in-depth interviews. Quantitative data were analyzed using descriptive and inferential statistics, including percentages, means, standard deviations, Pearson’s correlation, and ANOVA. Qualitative data were analyzed using content analysis and thematic analysis.

The findings revealed that the majority of students had a moderate level of knowledge about heat-related illnesses (56.7%), while only 30% had a high level of knowledge. Risk behaviors included not drinking water before exercise (60%), engaging in physical activities during peak heat hours (11:00 AM - 2:00 PM), and ignoring symptoms of heat illness. Quantitative analysis indicated a significant negative correlation between drinking water before sports and heat-related illnesses (r = -0.52, p < 0.01), whereas exercising during high temperatures showed a positive correlation with heat-related symptoms (r = 0.47, p < 0.01).

Based on these findings, recommended preventive measures include providing adequate drinking water stations, adjusting sports schedules to avoid extreme heat periods, and increasing awareness among teachers and students regarding early warning signs of heat-related illnesses.

Innovative IoT and Solar-Powered Herb Drying Cabinet with Temperature Control for Production of Community Identity Products of Nongsano Sub-district, Laokhwan District, Kanchanaburi Province

ผศ.ดร.มณีรัตน์ ภารนันท์ — Tue, 02 Sep 2025 00:00:00 +0700

This research aimed to: (1) develop Innovative IoT and Solar-Powered Herb Drying Cabinet with Temperature Control for Production of Community Identity Products of Nongsano Sub-district, Laokhwan; (2) test the efficiency of the developed innovation; and (3) study the outcomes of knowledge transfer regarding the use of this solar-powered, IoT-controlled herbal drying cabinet in producing three high-value herbal products: Nong Sano flower tea, Nong Sano flower and citronella scented lotion, and Nong Sano flower facial sunscreen. The research tools included: 1) IoT equipment, comprising NodeMCU ESP8266, DHT sensor, LDR sensor, Relay (for 12V DC), three DC cooling fans, two 75W heating lamps, Sonoff TH Elite for monitoring internal cabinet temperature, a 200W solar panel, a 12/24V PWM 30A charge controller, a 12V 100Ah battery, a 3000W 12V to 200-220V inverter, and a 30A breaker. 2) An innovation efficiency test. 3) An evaluation form for the knowledge transfer outcomes, assessing trainees' satisfaction and the practical application of the innovation after knowledge dissemination. The sample group consisted of 150 teachers and students from Baan Nong Sano School. The research findings revealed that the developed innovation was highly efficient (X= 4.50, SD=0.50). The outcomes after knowledge transfer to the sample group showed highest satisfaction (X= 4.40, SD=0.46). Students were able to further their knowledge and continuously use the innovation to process herbs and develop three products. This allowed them to generate income for the school to fund various student activities.

THE DEVELOPMENT OF PROBLEM-BASED LEARNING VIA GAMIFICATION TO ENHANCE MATHEMATICAL PROBLEM-SOLVING ABILITY FOR GRADE 5 STUDENTS

Rawee Noypitag, Phengpinyo Phengpinyo, Charinthorn Aumgri — Tue, 02 Sep 2025 00:00:00 +0700

The objective of this research was to develop and evaluate the effectiveness of problem-based learning activities integrated with gamification to enhance mathematical problem-solving ability among Grade 5 students. The study also aimed to compare students' academic achievement and problem-solving ability before and after the intervention, as well as to investigate their level of satisfaction with the learning activities. The target group consisted of 30 Grade 5 students from Ban Bang Pradang School (Laohadilokrat), selected through purposive sampling. The research instruments included instructional plans, online learning media via Google Site, academic achievement tests, mathematical problem-solving assessments, and a satisfaction questionnaire. Data were analyzed using descriptive statistics and t-tests. The findings revealed that the developed learning activities achieved an effectiveness score of 78.52/78.33, which exceeded the predetermined criterion of 75/75 with statistical significance at the .05 level. Both the students' academic achievement and problem-solving ability significantly improved after participating in the learning activities. Additionally, the students reported a very high level of satisfaction with the learning experience.

การสร้างเสริมจรรยาบรรณวิชาชีพแก่นักศึกษาในระดับอุดมศึกษา

ดร.ประดิษฐ์ สงค์แสงยศ — Tue, 02 Sep 2025 00:00:00 +0700

Teaching students to have knowledge and experience in their fields, morality and ethics should be fostered for students by managing teaching and learning in ethics courses and other courses in the curriculum and supplementary courses. Promote ethical behavior in the public mind, taking into account the collective and society. Lecturers and stakeholders must behave as good examples. To help students get used to a good environment. There is morality, ethics and shame for wrongdoing, and the ethical behavior of students is monitored to monitor the persistence and continuous development of ethical behavior. Ethics in the profession are considered critical to the profession that is assembled, which may affect those involved in that specialized professional field. Therefore, more studies should be conducted on strengthening morality and ethics in the professional field. Morality and ethics in teachers and stakeholders, which is classified as an environment that will contribute to strengthening morality and ethics in students. Students and employees in the organization will continue to be present.

การศึกษาเพื่อพัฒนามาตรการป้องกันการนำเข้าผักและผลไม้จากโรงคัดบรรจุ ที่มีประวัติสารพิษตกค้างไม่เป็นไปตามข้อกำหนด

Pitchayaporn Amnajvaraprasert — Tue, 02 Sep 2025 00:00:00 +0700

This study aimed to analyze the situation of imported fruit and vegetable packing houses with a history of non-compliance with pesticide residue standards and to develop more rigorous and effective preventive measures. A cross-sectional descriptive study design was employed, covering data from fiscal years 2019 to 2024, comprising 131 companies categorized by the number of commodity types sampled. Descriptive statistics, chi-square tests, and binomial tests were applied to examine differences in compliance rates. The results revealed a steadily increasing trend in non-compliance, with packing houses exceeding five failed samples rising to 68.75% in FY2024 in some categories. Notably, packing houses with only one type of commodity sampled exhibited statistically higher risk than those with multiple commodities (p < 0.05), suggesting a vulnerability linked to reliance on single suppliers and limited traceability systems. High-risk packing houses (e.g., K3, K7, L1, P4, CC1, KK4) were repeatedly non-compliant, highlighting weaknesses in the current import control system. To address this, four integrated risk-based policy recommendations are proposed: (1) implementing a risk-based surveillance system using historical non-compliance data; (2) promoting GAP Plus certification and requiring verified certificates of analysis (COA); (3) integrating inspection data with the national customs digital platform in real-time; and (4) enhancing legal enforcement mechanisms and exporter accountability. These recommendations aim to strengthen the national food safety control system and ensure sustainable consumer protection.

OPTIMIZATION OF ULTRASONIC-ASSISTED EXTRACTION OF ADENOSINE AND CORDYCEPIN FROM CORDYCEPS MILITARIS SPENT MUSHROOM SUBSTRATE USING ECO-FRIENDLY SOLVENTS

Suntara Fueangfung — Tue, 02 Sep 2025 00:00:00 +0700

This study aimed to determine the optimal conditions for extracting adenosine and cordycepin from Cordyceps militaris spent mushroom substrates (SMSs) using ultrasonic-assisted extraction with environmentally friendly solvents. Water was used as the primary solvent with the addition of small amounts of ethanol (water: ethanol ratios ranging from 99:1 to 95:5). The effects of solvent composition and extraction temperature were examined. The results revealed that extraction with water: ethanol ratio of 96:4 for 15 minutes yielded the highest contents of adenosine (3.33 ± 0.01 mg/kg) and cordycepin (479.01 ± 0.98 mg/kg). Further investigation using this optimal solvent system at different temperatures demonstrated that extraction at 60 °C produced the maximum yields (adenosine 4.16 ± 0.02 mg/kg and cordycepin 640.31 ± 0.15 mg/kg). Ultrasonic-assisted extraction, when combined with an appropriate solvent mixture and temperature, can significantly enhance the efficiency of extracting bioactive compounds from Cordyceps militaris SMSs. This method also gives a promising approach for adding value to waste materials from Cordyceps militaris cultivation.