Journal of Advanced Development in Engineering and Science

Applying Lean Principles to Reduce Curriculum Process Time by Using ECRS Technique Case Study: Faculty of Engineering and Technology, Rajamangala University of Technology Isan

Tue, 31 Dec 2024 00:00:00 +0700

This study aims to apply Lean principles to reduce the time required for curriculum development at the Faculty of Engineering and Technology, Rajamangala University of Technology Isan. The time taken for activities related to the development of five curricula was gathered through interviews, document collection, surveys, and data collection forms, revealing a total of 39 activities. The average time for curriculum development was found to be 1 year and 3 months. The study then analyzed delays in the curriculum development process by examining the 7 wastes, employing cause and effect diagrams, and conducting a Failure Mode and Effect Analysis (FMEA) to determine the Risk Priority Number (RPN) and prioritize issues. Further problem analysis using the Why-Why Analysis technique led to the identification of four solutions to reduce process time: Using a Kanban system to signal delays, implementing an online information system for data delivery, applying the ECRS (Eliminate, Combine, Rearrange, Simplify) method, providing training for staff. New activities were simulated using the ECRS principles to improve processes by focusing on eliminating non-value-added activities. A comparison between some activities in the old and new processes was conducted using data collection forms. The curriculum development time was reduced from 456.69 days to 296.09 days, a decrease of 35.16%. Additionally, the risk priority number in the FMEA analysis decreased from 1310 to 606, a reduction of 53.74%.

A Fuzzy Approach to Determine Production Lot Size for Capacitated Single-Stage Production Process with Fuzzy Demand

supatchaya Chotayakul, Varathorn Punyangarm — Tue, 31 Dec 2024 00:00:00 +0700

This paper addresses the production lot size problem for a fuzzy single-stage, multiple -item, capacitated lot-sizing model in the context of unrelated parallel machines, known as the F-CLSPP model. This problem is particularly useful for SMEs or new product production planning, where there is a lack of historical quantitative data, and the available data comes primarily from expert experience. In this paper, the problem is formulated as a fuzzy mixed-integer programming model in the form of a dynamic lot size and scheduling problem. To make the F-CLSPP model mathematically solvable, a chance-constraint programming concept and a possibility approach are proposed to transform it into an equivalent crisp CLSPP model. The fuzzy constraints are converted into equivalent crisp constraints using the extension principle, allowing the model to be solved with basic software. This procedure and model are tested with an illustrative numerical example, and the results demonstrate that this approach can provide valuable production planning information and assist in decision-making based on the confidence level in the data.

Influence of Marine Fish Amino Extractson Growth, Yield and Quality of Curly leaf Kale

Pimchana Hoktha, Sorapong Benchasri — Tue, 31 Dec 2024 00:00:00 +0700

The objective of this research was to compare the Influence of growth, yield and yield components of kale after receiving marine fish amino acid (MFA) at Thaksin University from January to August 2023. MFAs were sprayed as a foliar spray on curly leaf kale in the second weeks. Spraying will be done twice a week. MFAs were sprayed 5 concentrations consisting of 0.00, 1.50, 3.00, 4.50 and 6.00 ml/l. In this experiment, 0.00 ml/l was determined as a control treatment. The experiment was planned in a Completely Randomized Design with 4 replications. The results showed that the height, leaf width, leaf length, canopy width, stem diameter, and stem lengthwere statistically different in each treatments.The MFA 3.00 ml/l showed the highest of plant height and stem length, which were 43.02 and 17.21 cm/plant, respectively, while the concentration level was 1.50 ml/l showed the average of leaf width, leaf length, canopy width, and stem length, averaged 17.50 cm/leaf, 36.75 cm/leaf, 62.11 cm/plant and 3.79 cm/plant, respectively. In addition, the concentration level was 3.00 ml/l showed the average leaf weightand number of leaves/plant higher than other concentration levels, with an average of 12.66 grams/leaf and 25.33 leaves/plant, respectivelyandthe highest average leaf weight/ plant was 320.68 grams/plant, but not statistically different from the concentration levels 1.50, 4.50, and 6.00 ml/l gave averages of 306.76, 298.18 and 273.79 grams/plant, respectively, while being statistically different from the concentration level of 0.00 ml/l showed the lowest leaf weight about 210.61 grams/plant.

A Case Study on Investigating the Effects of Shear and Torsion on the Requirement of Longitudinal Rebar in Reinforced Concrete Beam

Phattaraphong Ponsorn — Tue, 31 Dec 2024 00:00:00 +0700

Longitudinal rebar is an important component of reinforced concrete (RC) beam because it has to be designed to resist shearing and torsional forces. In Thailand, there are two equations to determine the area of the longitudinal rebar which were provided by EIT Standard. The results obtained from those equations, however, have been doubted when considered in a relationship directly to the applied shear and torsion magnitudes. Concerning to the validation of the matter, this paper presents the investigation of the doubtful outcome from such two equations and get insight into the effects of shear and torsion on the requirement of the longitudinal rebar area. A sensitivity analysis, sets of computational data, including nonlinear finite element analysis, were conducted in the study. Results showed that the requirement ofthe longitudinal rebar area calculated using equations given by EIT standard has turned out some of the unreasonable solutions when considered depending on the magnitude of the applied shear and torsion. The result acquired by finite element analysis was more reasonable in comparison to the calculation following to EIT Standard. When the high shear force and torsion were applied, the beam required more the area of longitudinal rebar. For as the presence of stirrup in term of one leg area of a closed stirrup to center-to-center spacing ratio has negligibly affected to the determination of the requirement of the longitudinal rebar area. This is due to the main function of stirrup is to resist shear and torsion.

Properties of Charcoal Briquettes from Charcoal Scraps Mixed with Spent Coffee Grounds as An Alternative Fuel

Sataporn Komhom — Tue, 31 Dec 2024 00:00:00 +0700

The objective of this research was to analyze the properties of charcoal briquettes produced using charcoal scraps after burningbiomass materials through a selection of sieves smaller than 2.36 mm, mixed with spent coffee grounds discarded from steam-pressurized coffee machines, dried at 110 ^oC for 24 h. The experiment was designed by varying the weight ratio of charcoal scraps, coffee grounds, and starch glue at a concentration of 5% by weight and comparing all samples without glycerin and with glycerin mixed into starch glue. After analyzing the properties of the charcoal briquettes, the results showed that the weight ratio of charcoal scraps to coffee grounds was 3:1 and 3:2 by mixing glycerin into the starch glue as a possible condition for producing charcoal briquettes with suitable properties. It had a surface area of 7.95 and 4.97 m²/g, a density of 467.36 and 484.09 kg/m³, a fracture percentage of 2.22% and 1.45%, and a heating value of 23.43 and 21.84 MJ/kg, respectively. A test of heating 500 g of water withfour charcoal briquettes found that the 3:1 and 3:2 weight ratios mixed with glycerin revealed the highest temperatures of 71 and 66 ^oC, respectively,and both samples had an additional heating time of approximately 20 mincompared to samples with the same weight ratio without glycerin added.

A Multi-features Framework for Fake News Detection

Thongchai Kaewkiriya, Kanchana Silawarawet — Tue, 31 Dec 2024 00:00:00 +0700

Nowadays, social media is one of the key activities for the general public to share news and various stories with others. Consequently, there are malicious groups who seek to benefit themselves and cause societal disruption by creating and spreading fake news to the public. Recently, there have been efforts to develop systems for automatically detecting fake news on social media, such as using machine learning to analyze news data or employing systems to learn user behavior on social media. These methods have led to the concept of integrating multi-factor data analysis to enhance the accuracy of fake news detection systems. This research presents a multi-factor model for detecting fake news using techniques such as Term Frequency-Inverse Document Frequency (TF-IDF), concatenation, and neural networks, based on user posts. The dataset consists of 20,000 data entries, considering factors like headlines, sources, and user interactions. Testing the model with the Fakeddit.com fake news database revealed that the proposed model performs better in prediction accuracy compared to single-factor analysis and traditional machine learning methods, achieving an accuracy rate of 0.8504 (85.04%).

Using Smartphone for Measuring the Magnetic Field Produced by the Current Flow in a Single Straight Line

Tue, 31 Dec 2024 00:00:00 +0700

In this study, we design and build an experimental kit to use a smartphone to measure magnetic fields in accordance with Ampere's Law. The Phyphox application was used to measure the magnetic field created by a single straight-line current flow. We provide a method for removing the noise from the other electrical equipment in our experiment as well as the Earth's magnetic field. Air has a permeability of about 1.164 - 1.233 x10^-6 N A^-2.

Effect of Harvesting Times of the HomKradung-Nga Cultivar Rice Seedlings on Active Substance Contents and Antioxidant Activity to be Used for Processing into Tea Products

Tue, 31 Dec 2024 00:00:00 +0700

The objectives of this study were to determine the active substance contents including total phenolic,flavonoid, and to analyze the antioxidant activity of HomKradung-Nga rice seedlings at different harvesting times such as 5, 10, 15, 20, 25 and 30 days after planting. Then, the rice seedlings were dried at 60°C for 24 h, ground to fine powder and extracted the samples with a single immersion in two different solvents: hot distilled water (100 °C) and 80% (v/v) ethanol(room temperature).The experiment was conducted using a completely randomized design (CRD) with three replications. It was analyzed by spectrophotometric technique. The results showed that the harvesting times of HomKradung-Nga rice seedlings and the type of solvent used for extraction had a statistically significant effect on the active substance contents (p<0.05).The seedlings were planted at 10 days and were extracted with 80%(v/v) ethanol had the highest value of total phenolic and flavonoid contents as 13.82±0.06 mg of GAE/g.dw and 17.50±0.11 mg of quercetin equivalent/g.dw, respectively. As for antioxidant capacityassay with 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity method, the IC₅₀value was 226.07 mg/mL.Therefore, in this reseach, the selecting rice seedlings with the appropriate harvesting period affected on the contents of total phenolic, flavonoid, and antioxidant efficiency. It can be used to further developHomKradung-Nga rice seedlings tea product for health care.

Effects of Melanoidins on the Efficiency of Anaerobic Digestion

Boonchai Wichitsathian, Watcharapol Wonglertarak, Wimonmas Boonyungyuen — Tue, 31 Dec 2024 00:00:00 +0700

Melanoidins are dark brown to black substances formed from the condensation of glucose and amino groups, produced through non-enzymatic browning reactions. These melanoidins are predominantly found in wastewater from industries involving fermentation and distillation processes that use molasses as a raw material. These industries commonly use anaerobic digestion systems for primary treatment to reduce organic compounds in the wastewater, producing biogas as a byproduct that can be utilized as a renewable energy source. However, excessive amounts of melanoidins can negatively impact the microorganisms that produce volatile fatty acids (VFA), leading to a decrease in these acids and consequently reducing biogas production. Therefore, it is necessary to control the concentration of melanoidins to maintain optimal system efficiency.Studies assessing the toxicity of melanoidins have shown that at a concentration of 10,000 mg/l, melanoidins have a maximum biogas production potential of 0.162 l/kg COD_remove, with an 80% COD removal efficiency. When the concentration of melanoidins exceeds 10,000 mg/l, biogas production decreases due to the inhibitory effects of melanoidins on the growth of microorganisms essential for biogas production.

Design and Development of Vases Made from Woven Bamboo Handicrafts by Applying Kano Model with the Quality Function Deployment

Tue, 31 Dec 2024 00:00:00 +0700

The purpose of this research was to apply the Kano model technique and Quality Function Deployment (QFD) for the design and development of woven bamboo vase products that suit the needs of customers. This research began with the application of QFD by preparing questionnaire 1. to survey the customer needs for products. The Kano model was then applied by preparing questionnaire 2. to create a questionnaire to explore and analyze the coefficients of satisfaction and dissatisfaction of customers towards the requirements of qualified products that can be used as a component in product design. Afterward, the QFD techniques were applied to analyze product requirements and technical requirements again. The analysis results showed that woven bamboo vase products changed in terms of style, quality, pattern, size, shape, and usage characteristics,which is more in line with the needs of customers. Additionally, the satisfaction assessment was found that the technical satisfaction rating in terms of the modern aesthetics of the product was determined in first, which is very good level and an average of 4.53. Also, the technical satisfaction score in the field of the local identity was determined in second, which is very good level with an average of 4.50.