Wittayasara: Integration Apply Engineering and Industrial Technology

The improvement of roselle petals quality using solar greenhouse dryer: A case study at the Local Herbal Learning Center, Mae Mo district, Lampang province

2024-10-17T14:20:16+07:00

This research, study evaluates the effectiveness of a greenhouse solar dryer in reducing the moisture content of dried red roselle petals at the Local Herbal Learning Center in Mae Mo District, Lampang Province. The research demonstrated that the greenhouse solar dryer efficiently reduced the initial relative humidity of the petals from 23.45% to a final moisture content of 3.70% within 6 to 9 hours. By employing programmable logic control, the dryer maintained precise temperature and humidity levels, optimizing the drying conditions. Comparative analysis against Thai Community Product Standards (TCPS) 480/2547 revealed significant improvements in product quality, with the moisture content of the dried petals decreasing from 14.67% to 7.34%, meeting established standards. Additionally, the dried petals adhered to safety criteria for heavy metals and microbial contamination, confirming the effectiveness and reliability of the greenhouse solar dryer.

Development of Art Toy Souvenirs Based on Cultural Capital Identity in Chiang Rai Province

2024-10-03T14:11:42+07:00

This research paper on “Development of Art Toy Souvenirs Based on Cultural Capital Identity in Chiang Rai Province” is part of a broader research project aimed at designing souvenirs from cultural capital to create value and promote creative tourism in Chiang Rai. The research has the following objectives: 1) To design and produce art toy souvenirs based on cultural capital to create value and promote creative tourism in Chiang Rai, and 2) To test the market for art toy souvenirs in Chiang Rai tourism that align with the current purchasing behavior and trends of art toys among tourists. A mixed methods research approach (MMR) was employed, integrating multiple data collection techniques. The study was divided into two phases. In the first phase, the research delved into the cultural heritage of Chiang Rai, analyzing and synthesizing data to identify suitable products that align with contemporary consumer behaviors and the trends of creative tourism. The second phase involved leveraging the findings to develop distinct brand archetypes inspired by Chiang Rai's cultural heritage, ultimately creating unique art toy souvenirs. These were divided into three cultural themes of Chiang Rai that consumers are interested in and perceive through tourism: 1) Nature and architecture, 2) Ethnic groups, and 3) Beliefs, literature, and legends. A total of 21 character designs were created, resulting in 1,500 art toy souvenirs. These were sold and tested at the Chiangrai Biennale 2023. The evaluation of customer satisfaction showed a high level of satisfaction, with an average score of 4.36 and a standard deviation of 0.66.

Development of Severity Image Pressure Injury Classification Using YOLO and Deep Learning

2024-09-24T13:37:18+07:00

This study develops a system utilizing artificial intelligence and machine learning to accurately classify the severity of pressure injuries from images. We synthesized and processed a dataset of open-pressure injury images into 224 x 224-pixel dimensions suitable for machine learning algorithms. The research is divided into two main components: image classification to assess wound severity and image segmentation to identify specific wound areas. We employed the YOLOv8 technique, which includes five variants: n, s, m, l, and x. Our findings indicate that the YOLOv8x-cls and YOLOv8s-cls models achieved the highest accuracy in image classification, with a value of 0.8. In terms of image segmentation, the YOLOv8n-seg model showed the highest accuracy, with a value of 0.682, while the YOLOv8x-seg model demonstrated the highest recall value of 0.69. These results highlight the effectiveness of the YOLOv8 models in handling image complexity and accurately classifying wound severity. Future research should focus on further improving model accuracy to enhance its application in medical settings.

Potential assessment of a hybrid multigeneration system from waste-solar energy: case study Mae Moh District, Lampang Province

2024-09-28T00:27:00+07:00

This study presents the energy, economic, and environmental implications of a hybrid multigeneration system from waste-solar energy in the Mae Moh District of Lampang Province. The survey data imply a total municipal solid waste (MSW) generation of 17.85 Ton/d, with 31.63% of this being combustible waste. Combustion heat is used to produce hot fluid at 110 °C, supplied to a two-stage organic Rankine cycle generating 55.57 kW_e, an absorption chiller of 91.06 kW, a drying room of 207.39 kW, and a solar photovoltaic rooftop system of 847 kW_p. The hybrid multigeneration system shows a total energy output of 5,211.44 kWh/d, a net power output of 2,823.86 kWh/d, and an overall efficiency of 18.34%. A levelized energy cost of 5.38 Baht/kWh, a net present value of 57,710,801.41 Baht, an internal rate of return of 7.97%, and a payback period of 9.63 y are achieved from an economic perspective. The environmental impact assessment shows a climate change impact of 6.01E-02 kg CO₂ eq/kWh, human toxicity of 5.04E-02 kg 1,4-DB eq/kWh, and mineral resource depletion of 1.74E-02 kg Fe eq/kWh. These impacts are primarily driven from concrete, copper, steel, and gypsum in building construction.

Green Design for Pave Way Connection: A Case Study of Chiang Khong Community, Chiang Rai Province

2024-09-17T10:07:20+07:00

The objectives of this study divided into 2 issues: the connection of routes and the design of Pave way to create Green Network. The questionnaire was used for acquiring the data from two groups of the samples who were both residents and non-residents in the community, and then the obtained data was processed. It was found that both groups of samples preferred the same representative images, and the mean score of each of all images was averagely ranged between 3.21- 4.00. According to the preset criteria, this means that preferences of most questionnaire respondents toward the selected representative image at the highest level. To summarize, it was the connection of Paveway with short network, divided into parts particularly in some area all along the route without obstacles to the routes. In terms of design, it can be divided into 2 issues due to frequency and volume of traffic as follows. 1) the design for the zone with road users all day, the Paveway was designed by using perennial plants, native plants, and landscape components for additional decoration. The surface was paved with rough pavement materials with decorative patterns added with a corridor for the visually impaired, and paving materials for reducing the speed of cars, motorcycles, and bicycles. 2) The design for the zone with low volume of traffic or some users in some periods of the day, the Paveway was designed by using trees, native plants and vegetables, and landscape elements were added, and compacted soil pavement materials to enhance naturality.