Simulating and Evaluating the Performance of a Cloud Computing Datacenter Using Queuing Model Mubarak Albarka Umar 2024 6th International Symposium on Advanced Electrical and Communication Technologies Isaect 2024, 2024 Cloud computing and virtualization are fundamental to modern computer system design. As cloud computing adoption grows across organizations, evaluating its performance becomes essential. This study simulates and analyzes a cloud datacenter’s performance using queuing models. Specifically, an Mt/M/1/K queuing system is employed, with arrival parameters estimated from real CPU utilization data from the Bitbrains datacenter, modeled as discrete Homogeneous Poisson Processes (HPPs). The simulation results of the modeled system reveal minimal average waiting time and efficient task processing with low delays. Additionally, the study highlights the significant impact of service rates on the average response times of tasks arriving as discrete HPPs. These findings offer valuable insights into cloud datacenter performance, aiding in informed decisions for service upgrades and optimal resource utilization.
Cyber-Attack Detection in Smart Grids: A Comparative Analysis of Supervised and Semi-Supervised Methods Mubarak Albarka Umar, Khaled Shuaib 2024 6th International Symposium on Advanced Electrical and Communication Technologies Isaect 2024, 2024 The advancement of smart grids has addressed many challenges of traditional power grids, yet it has also introduced new vulnerabilities to cyber-attacks that can disrupt power, leading to severe socio-economic impacts like blackouts and grid disturbance. While numerous supervised machine learning methods have been proposed to detect cyber-attacks in smart grids, they require a large dataset of normal and attack instances for training. However, gathering sufficient samples of diverse attack scenarios, especially zero-day attacks, is challenging. In this paper, we develop a semi-supervised model to detect grid attacks using phasor measurement unit (PMU) data from a power system dataset. Principal component analysis (PCA) is applied to select optimal components, and the model is trained using high instances of normal event data, thus enabling it to identify new, unknown attack patterns. We also developed a supervised model for comparison, evaluating both using key metrics. Results demonstrate that the semi-supervised model is more effective in detecting attack events (with 91.2% precision and 90% accuracy) than the supervised approach (90.7% precision and 91.8% accuracy).
Autoencoder-based Arrhythmia Detection using Synthetic ECG Generation Technique Ali Nawaz, Mubarak Albarka Umar, Khaled Shuaib, Amir Ahmad, Abdelkader Nasreddine Belkacem Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society EMBS, 2024 With a couple of million lives lost annually, cardiovascular disease (CVD) is the leading cause of death globally; about 80% of which are due to arrhythmia. Electrocardiogram (ECG) signals are important for arrhythmia diagnosis, researchers have used various ECG datasets in building arrhythmia detection systems to automate the manual time-consuming diagnostic process. However, existing datasets have class imbalance issues, and the traditional oversampling and undersampling techniques prove ineffective in handling the imbalance problem. We propose a novel approach to handling arrhythmia detection as an anomaly case to address this. In our proposed approach, we first use Generative Adversarial Networks (GANs) to synthetically generate normal training instances from the MIT-BIH arrhythmia dataset and then we use only the synthetically generated normal data to build the anomaly model using autoencoder (AE); employing the AE for unsupervised anomaly detection help in overcoming the GAN convergence issues. We evaluate the model using test data comprising both normal and abnormal samples that are not used by the GAN and compare its performance with other state-of-the-art works. The model achieved improved arrhythmia detection with an AUC-ROC of 0.6768 and an AUC-PR of 0.8537. While effectively tackling data scarcity and imbalance, this work also contributes valuable perspectives to enhance arrhythmia detection systems, providing a foundation for more reliable and adaptable solutions in healthcare.
LRCMP: A Sequential Statistical Framework for Predicting Cancer Mortality Rate Mubarak Albarka Umar, Ali Nawaz, Tariq Qayyum Imtic 2023 7th International Multi Topic ICT Conference 2023 AI Convergence Towards Sustainable Communications, 2023 Over 10 Million deaths in the world are because of cancer. Cancer is the second leading cause of death after cardiovascular disease. Additionally, Cancer has significant effects on the socioeconomic status of a family. There are several studies about socioeconomic status and cancer. This work firstly focuses on exploring the relationships between socioeconomic status and cancer mortality rate from disparate open-source data using statistical analysis. Initially, the data consists of 34 features which are reduced to 13 most relevant features using the backward selection method. Secondly, based on the cancer data, we build an appropriate model that can predict the cancer death rate. Specifically, a linear regression model is built and trained for cancer mortality rate prediction. Several models were first built and linear regression diagnostics are performed on the models to check for any assumption violations, finally, the most appropriate model is selected and fine-tuned to provide optimized results. The model is assessed and R2 and RMSE are used to evaluate the model's performance, the model achieved an R2 of 81.12% and RMSE score of 12.23 on test data. Our work also highlights the importance of checking regression assumptions in linear regression modeling.
A Time Series Regression-based Model for Predicting the Spread of Dengue Disease Muhammad Danish Waseem, Ali Nawaz, Uzair Rasheed, Abir Raza, Mubarak Omar Albarka 2023 International Conference on Robotics and Automation in Industry Icrai 2023, 2023 Dengue is a viral disease, spread by the mosquito species Aedes aegypti. According to WHO, every year 100-400 million cases of dengue infection are reported worldwide. Dengue mosquito inhibits in tropical regions and proliferates in wet climate conditions. Since it is impossible to clean those regions from the mosquito completely, therefore an analysis of the relationship between different climatic factors and dengue spread is important to forecast the number of cases ahead so that precautionary measures can be taken beforehand to minimize the disease spread. Specifically, to predict the spread we employed two prominent time series models i.e. SARIMA and SARIMAX on the publicly available DengAI dataset. The performance of the models is evaluated by using Mean Absolute Error (MAE), achieving MAE scores of 27.39 and 25.52 on SARIMA and SARIMAX respectively, which reveals that our proposed methodology outperformed other existing machine learning methods.
Network Intrusion Detection Using Wrapper-based Decision Tree for Feature Selection Mubarak Albarka Umar, Chen Zhanfang, Yan Liu ACM International Conference Proceeding Series, 2020 One of the key challenges of the machine learning (ML) based intrusion detection system (IDS) is the expensive computation time which is largely caused by the redundant, incomplete, and unrelated features contain in the IDS datasets. To overcome such challenges and ensure building efficient and more accurate IDS models, many researchers utilize preprocessing techniques such as normalization and feature selection, and a hybrid modeling approach is typically used. In this work, we propose a hybrid IDS modeling approach with an algorithm for feature selection (FS) and another for building the IDS. The FS method is a wrapper-based FS with a decision tree as the feature evaluator. Five selected ML algorithms are individually used in combination with the proposed FS method to build five IDS models using the UNSW-NB15 dataset. As a baseline, five more IDS models are built, in a single modeling approach, using the full features of the datasets. We evaluate the effectiveness of our proposed method by comparing it with the baseline models and also with state-of-the-art works. Our method achieves the best DR of 97.95% and proved to be quite effective in comparison to state-of-the-art works. We, therefore, recommend its usage especially in IDS modeling with the UNSW-NB15 dataset.
An explainable artificial intelligence and Internet of Things framework for monitoring and predicting cardiovascular disease MA Umar, N AbuAli, K Shuaib, AI Awad Engineering Applications of Artificial Intelligence 144, 110138 , 2025 2025 Citations: 9
Cyber-attack detection in smart grids: A comparative analysis of supervised and semi-supervised methods MA Umar, K Shuaib 2024 6th International Symposium on Advanced Electrical and Communication … , 2024 2024 Citations: 1
Simulating and evaluating the performance of a cloud computing datacenter using queuing model MA Umar 2024 6th International Symposium on Advanced Electrical and Communication … , 2024 2024 Citations: 1
Effects of Feature Selection and Normalization on Network Intrusion Detection MA Umar, Z Chen, K Shuaib, Y Liu Data Science and Management 8 (01), 23-39 , 2024 2024 Citations: 130
Autoencoder-based arrhythmia detection using synthetic ECG generation technique A Nawaz, MA Umar, K Shuaib, A Ahmad, AN Belkacem 2024 46th Annual International Conference of the IEEE Engineering in … , 2024 2024 Citations: 4
LRCMP: a sequential statistical framework for predicting cancer mortality rate MA Umar, A Nawaz, T Qayyum 2023 7th international multi-topic ICT conference (IMTIC), 1-8 , 2023 2023 Citations: 5
A time series regression-based model for predicting the spread of dengue disease MD Waseem, A Nawaz, U Rasheed, A Raza, MO Albarka 2023 International Conference on Robotics and Automation in Industry (ICRAI … , 2023 2023 Citations: 3
A Hybrid Intrusion Detection with Decision Tree for Feature Selection MA Umar, Z Chen, Y Liu Information & Security: An International Journal 49 , 2021 2021 Citations: 18
Fighting Crime and Insecurity in Nigeria: An Intelligent Approach MA Umar, A Aliyu Machina, M Ibrahim, JA Nasir, A Saheed Salahudeen, ... International Journal of Computer Engineering in Research Trends 8 (01), 6-14 , 2021 2021 Citations: 10
A Comparative Study of Dynamic Software Testing Techniques MA Umar, Z Chen International Journal of Advanced Networking and Applications 12 (03), 4575-4584 , 2021 2021 Citations: 33
Web Load Balancing Method Based On Resource Request Division Z Chen, X Jiang, Y Zhang, MA Umar International Journal of Software & Hardware Research in Engineering (IJSHRE … , 2020 2020
Network Intrusion Detection Using Wrapper-based Decision Tree for Feature Selection MA Umar, Z Chen, Y Liu Proceedings of the 2020 International Conference on Internet Computing for … , 2020 2020 Citations: 43
Analysis and Design of Fire Emergency Application (FEAP) MA Umar, AS Salahudeen, J Ehi Okoh, M Siddig Mohamed International Journal of Computer Science and Mobile Computing 9 (1), 40-51 , 2020 2020 Citations: 8
A Study of Automated Software Testing: Automation Tools and Frameworks MA Umar, Z Chen International Journal of Computer Science Engineering 8 (06), 217-225 , 2019 2019 Citations: 119
Student Academic Performance Prediction using Artificial Neural Networks: A Case Study MA Umar International Journal of Computer Applications 178 (Number 48), 24-29 , 2019 2019 Citations: 30
Robust estimation and outlier detection based on linear regression model L Cui, L Cheng, X Jiang, Z Chen, MA Umar Journal of Intelligent & Fuzzy Systems, 1-8 , 2019 2019 Citations: 8
Comprehensive study of software testing: Categories, levels, techniques, and types MA Umar International Journal of Advance Research, Ideas and Innovations in … , 2019 2019 Citations: 84
MOST CITED SCHOLAR PUBLICATIONS
Effects of Feature Selection and Normalization on Network Intrusion Detection MA Umar, Z Chen, K Shuaib, Y Liu Data Science and Management 8 (01), 23-39 , 2024 2024 Citations: 130
A Study of Automated Software Testing: Automation Tools and Frameworks MA Umar, Z Chen International Journal of Computer Science Engineering 8 (06), 217-225 , 2019 2019 Citations: 119
Comprehensive study of software testing: Categories, levels, techniques, and types MA Umar International Journal of Advance Research, Ideas and Innovations in … , 2019 2019 Citations: 84
Network Intrusion Detection Using Wrapper-based Decision Tree for Feature Selection MA Umar, Z Chen, Y Liu Proceedings of the 2020 International Conference on Internet Computing for … , 2020 2020 Citations: 43
A Comparative Study of Dynamic Software Testing Techniques MA Umar, Z Chen International Journal of Advanced Networking and Applications 12 (03), 4575-4584 , 2021 2021 Citations: 33
Student Academic Performance Prediction using Artificial Neural Networks: A Case Study MA Umar International Journal of Computer Applications 178 (Number 48), 24-29 , 2019 2019 Citations: 30
A Hybrid Intrusion Detection with Decision Tree for Feature Selection MA Umar, Z Chen, Y Liu Information & Security: An International Journal 49 , 2021 2021 Citations: 18
Fighting Crime and Insecurity in Nigeria: An Intelligent Approach MA Umar, A Aliyu Machina, M Ibrahim, JA Nasir, A Saheed Salahudeen, ... International Journal of Computer Engineering in Research Trends 8 (01), 6-14 , 2021 2021 Citations: 10
An explainable artificial intelligence and Internet of Things framework for monitoring and predicting cardiovascular disease MA Umar, N AbuAli, K Shuaib, AI Awad Engineering Applications of Artificial Intelligence 144, 110138 , 2025 2025 Citations: 9
Analysis and Design of Fire Emergency Application (FEAP) MA Umar, AS Salahudeen, J Ehi Okoh, M Siddig Mohamed International Journal of Computer Science and Mobile Computing 9 (1), 40-51 , 2020 2020 Citations: 8
Robust estimation and outlier detection based on linear regression model L Cui, L Cheng, X Jiang, Z Chen, MA Umar Journal of Intelligent & Fuzzy Systems, 1-8 , 2019 2019 Citations: 8
LRCMP: a sequential statistical framework for predicting cancer mortality rate MA Umar, A Nawaz, T Qayyum 2023 7th international multi-topic ICT conference (IMTIC), 1-8 , 2023 2023 Citations: 5
Autoencoder-based arrhythmia detection using synthetic ECG generation technique A Nawaz, MA Umar, K Shuaib, A Ahmad, AN Belkacem 2024 46th Annual International Conference of the IEEE Engineering in … , 2024 2024 Citations: 4
A time series regression-based model for predicting the spread of dengue disease MD Waseem, A Nawaz, U Rasheed, A Raza, MO Albarka 2023 International Conference on Robotics and Automation in Industry (ICRAI … , 2023 2023 Citations: 3
Cyber-attack detection in smart grids: A comparative analysis of supervised and semi-supervised methods MA Umar, K Shuaib 2024 6th International Symposium on Advanced Electrical and Communication … , 2024 2024 Citations: 1
Simulating and evaluating the performance of a cloud computing datacenter using queuing model MA Umar 2024 6th International Symposium on Advanced Electrical and Communication … , 2024 2024 Citations: 1
Web Load Balancing Method Based On Resource Request Division Z Chen, X Jiang, Y Zhang, MA Umar International Journal of Software & Hardware Research in Engineering (IJSHRE … , 2020 2020
