Middle East Journal of Applied Science & Technology (MEJAST) is the dominant journal for publishing innovative research ideas in arts, science, medicine, law, engineering and technology domains with relevant applications. MEJAST welcomes full papers, communications, technical notes, critical and tutorial review articles, editorials, and comments, in addition to the literature reviews that are prepared by an expert panel. This includes, but is not restricted to, the most recent progress, developments and achievements in all the below mentioned domains.
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View MoreResearch Article
Mst. Sumaiya Akter Mim, Md. Julker Nayeem, Sohel Rana & Md. Rabiul Islam
Abstract: The application of classification approaches utilizing multi-variable with machine learning methods holds immense implications, particularly in the realm of healthcare and disease prediction. Accurate classification of medical conditions, such as hepatitis, is critical for early diagnosis and timely intervention. In order to identify people based on important hepatitis-related characteristics, this study applies advanced machine learning with statistical techniques. It also examines a real dataset in order to create a reliable early detection predictive model. Through this model, we aspire to raise awareness and guide affected individuals toward timely treatment. The paper focuses on comprehensive data preprocessing, including outlier removal, handling class imbalance problem, missing values and extract highly correlated features in order to improve model performance. In our research paper, we have applied mean/mode imputation technique to deal with missing values. Furthermore, we have used z score approach to detect and remove outliers from out dataset and handle class imbalance problem by using oversampling technique. To identify features that are highly correlated, we have used the embedded feature selection approach in our paper. Classic machine learning algorithms, notably K-Nearest Neighbors (KNN), Naive Bayes (NB) and Random Forest (RF) have employed to predict either a person is affected by hepatitis disease or not. To assess the efficacy of our model, we have utilized the 10-fold cross validation procedure. At 97.44%, we have the highest classification accuracy from RF, with Precession, Recall, F1 score and ROC values of, respectively, 0.99, 0.96, 0.97 and 1.00.
Review Article
Ravi Yadav
Abstract: Background: The reliability of neuromuscular monitoring is essential in optimizing anesthesia outcomes. Quantitative Train-of-Four (TOF) monitoring has emerged as a tool for ensuring precise neuromuscular blockade management. Objectives: This study aims to compare the efficacy and safety of neuromuscular blockade reversal guided by quantitative TOF monitoring with reversal conducted without such monitoring. Methods: A literature-based analysis was conducted, evaluating existing data and trends regarding the use of quantitative TOF monitoring in clinical practice. Performance metrics, such as precision in blockade reversal, efficiency, and associated outcomes, were assessed to highlight the advantages and limitations of each approach. Results: Findings demonstrated that quantitative TOF monitoring facilitates a more consistent and reliable reversal of neuromuscular blockade. It reduces the risk of residual paralysis and enhances patient safety. In contrast, practices without TOF monitoring showed variability in outcomes, reflecting potential gaps in blockade management. Conclusions: Incorporating quantitative TOF monitoring into anesthesia practices improves the accuracy of neuromuscular blockade reversal, emphasizing its importance in modern anesthetic care. The study underscores the need for broader adoption of such technologies to standardize outcomes and enhance procedural safety.
Review Article
Review on renewable energy-based KY boost converter and seven level-inverter systems
Gopika B.S. & Rajeshwari
Abstract: Static VAR compensators (SVC), power rectifiers, and thyristor converters are examples of power electronics components that significantly contribute to harmonics in a range of applications. The use of power electronic converters, especially DC/AC PWM inverters, has been expanding in the industry due to the advantages they provide, including reduced energy consumption, improved system efficiency, higher-quality products, simplicity of maintenance, and more. One of the most basic and well-known topologies for multilevel inverters is cascaded H-Bridge (CHB) MLI. A KY boost converter with seven-level inverters is suggested in this study. A Matlab simulation is used to evaluate the suggested work. According to the simulation findings, the output voltage climbed from 121V to 155V, the motor speed increased from 940 rpm to 1050 rpm, the motor torque increased from 0.92 N/m to 1.80 N/m, and the output current THD decreased from 31.2% to 19.01% when a KY boost converter with a seven-level inverter was used. According to the simulation results, the conventional boost converter with a five-level inverter system performs worse than the suggested KY boost converter with seven-level inverters.