Ahmad Raza Khan

Dr. Ahmad Raza Khan

Computer and Information Sciences, Majmaah University, Riyadh, Ar Riyāḑ, Saudi Arabia
+1
orcid
Associate Professor | PhD in Computer Science and Engineerin...

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 March 2024 in Processes
Verified
Journal Article
Open access
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Ahmad Raza KhanAhmad Raza Khan
Ahmad Raza Khan
Dynamic load balancing in cloud computing is crucial for efficiently distributing workloads across available resources, ensuring optimal performance. This research introduces a novel dynamic load-balancing approach that leverages a deep learning model combining Convolutional Neural Networks (CNNs) and Recurrent Neural Networks (RNNs) to calculate load values for each virtual machine (VM). The methodology aims to enhance cloud performance by optimizing task scheduling and stress distribution. The proposed model employs a dynamic clustering mechanism based on computed loads to categorize VMs into overloaded and underloaded clusters. To improve clustering efficiency, the approach integrates Reinforcement Learning (RL) with a sophisticated Hybrid Lyrebird Falcon Optimization (HLFO) algorithm. HLFO merges the Lyrebird Optimization Algorithm (LOA) and Falcon Optimization Algorithm (FOA), enhancing the effectiveness of load balancing. A Multi-Objective Hybrid Optimization model is introduced to optimize task scheduling while considering Quality of Service (QoS) parameters, including makespan minimization, energy consumption reduction, balanced CPU utilization, efficient memory usage, and task prioritization. The implementation, conducted in Python and CloudSim, demonstrates the model’s ability to effectively allocate work between virtual machines (VMs) and physical machines (PMs), resulting in improved resource utilization, shortened makespan, enhanced CPU usage, and rigorous assessments affirming its efficacy. This research addresses the complexity of dynamic load balancing in cloud environments by combining deep learning, reinforcement learning, and hybrid optimization techniques, offering a comprehensive solution to optimize cloud performance under varying workloads and resource conditions.

14 March 2023 in IEEE Journal of Biomedical and Health Informatics
Verified
Journal Article
Closed access
BABless Lord Yayra Agbley
Bless Lord Yayra Agbley
JLJian-Ping Li
Jian-Ping Li
AHAMIN UL HAQ
AMIN UL HAQ
EBEdem Kwedzo Bankas
Edem Kwedzo Bankas
CMCobbinah Bernard Mawuli
Cobbinah Bernard Mawuli
Ahmad Raza KhanAhmad Raza Khan
Ahmad Raza Khan
Breast tumor detection and classification on the Internet of Medical Things (IoMT) can be automated with the potential of Artificial Intelligence (AI). However, challenges arise when dealing with sensitive data due to the dependence on large datasets. To address this issue, we propose an approach that combines different magnification factors of histopathological images using a residual network and information fusion in Federated Learning (FL). FL is employed to preserve the privacy of patient data, while enabling the creation of a global model. Using the BreakHis dataset, we compare the performance of FL with centralized learning (CL). We also performed visualizations for explainable AI. The final models obtained become available for deployment on internal IoMT systems in healthcare institutions for timely diagnosis and treatment. Our results demonstrate that the proposed approach outperforms existing works in the literature on multiple metrics.

13 May 2025 in Scientific Reports
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Journal Article
Open access
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SSSunil Kumar Sharma
Sunil Kumar Sharma
AAAhmed Ibrahim Alutaibi
Ahmed Ibrahim Alutaibi
Ahmad Raza KhanAhmad Raza Khan
Ahmad Raza Khan
GHANSHYAM G. TEJANIGHANSHYAM G. TEJANI
GHANSHYAM G. TEJANI
FAFuzail Ahmad
Fuzail Ahmad
SMSeyed Jalaleddin Mousavirad
Seyed Jalaleddin Mousavirad
People of all demographics are impacted by mental illness, which has become a widespread and international health problem. Effective treatment and support for mental illnesses depend on early discovery and precise diagnosis. Notably, delayed diagnosis may lead to suicidal thoughts, destructive behaviour, and death. Manual diagnosis is time-consuming and laborious. With the advent of AI, this research aims to develop a novel mental health disorder detection network with the objective of maximum accuracy and early discovery. For this reason, this study presents a novel framework for the early detection of mental illness disorders using a multi-modal approach combining speech and behavioral data. This framework preprocesses and analyzes two distinct datasets to handle missing values, normalize data, and eliminate outliers. The proposed NeuroVibeNet combines Improved Random Forest (IRF) and Light Gradient-Boosting Machine (LightGBM) for behavioral data and Hybrid Support Vector Machine (SVM) and K-Nearest Neighbors (KNN) for voice data. Finally, a weighted voting mechanism is applied to consolidate predictions. The proposed model achieves robust performance and a competitive accuracy of 99.06% in distinguishing normal and pathological conditions. This framework validates the feasibility of multi-modal data integration for reliable and early mental illness detection.

23 December 2024 in IEEE Access
Verified
Journal Article
Open access
PCPratikkumar Chauhan
Pratikkumar Chauhan
MLMunindra Lunagaria
Munindra Lunagaria
DVDeepak Kumar Verma
Deepak Kumar Verma
KVKrunal Vaghela
Krunal Vaghela
GHANSHYAM G. TEJANIGHANSHYAM G. TEJANI
GHANSHYAM G. TEJANI
Ahmad Raza KhanAhmad Raza Khan
Ahmad Raza Khan
Brain Tumor holds a significant holds in human health, classified into three primary types: glioma, meningioma, and pituitary tumors. Early detection and accurate classification are vital for effective diagnosis and lowering healthcare costs. In PBvit we presents a novel brain tumor detection framework, the Patch Base Vision Transformer (PBVit). PBVit adopts a patch-based approach where input tumor images are divided into fixed-size patches, with each patch treated as a token. These image patches are linearly projected into lower-dimensional token embeddings, and positional encodings are added to help the model understand spatial relationships within the image. PBVit enhances the detection of intricate patterns and anomalies in brain scans, improving diagnostic accuracy. We trained PBVit using the Figshare brain tumor dataset and observed notable performance improvements compared to traditional CNN-based models. The PBVit reached an accuracy of 95.8%, a precision of 95.3%, a recall of 93.2%, and an F1-score of 92%, indicating its robustness in identifying brain tumors. The promising results demonstrate that PBVit can play a important role in facilitating early-stage diagnosis, reducing unnecessary biopsies, and ultimately enhancing patient care, while also showcasing the potential of transformer-based architectures in medical imaging.

10 March 2025 in IEEE Access
Verified
Journal Article
Open access
NSN. Sivakumar
N. Sivakumar
Ahmad Raza KhanAhmad Raza Khan
Ahmad Raza Khan
SUSyed Umar
Syed Umar
RRR. N. Ravikumar
R. N. Ravikumar
IBI. Bremnavas
I. Bremnavas
SSSunil Kumar Sharma
Sunil Kumar Sharma
Data privacy and heterogeneity among healthcare settings present fundamental challenges to machine learning (ML) brain tumor classification (BTC) model development based on local data. In this paper, we outline the need to develop an effective brain tumor diagnosis model while ensuring data security. We propose a distributed learning framework based on Federated Learning (FL) to build such a system. This framework combines Federated Averaging (FedAvg) and Federated Proximal (FedProx) to train Convolutional Neural Networks (CNN) on data hosted by multiple clients. FedAvg saves these locally trained models from the patients to make a global model while keeping sensitive patient data decentralized and private. Nevertheless, traditional FL suffers from model instability and divergence due to the disparity of data distributions among clients. FedProx addresses this challenge by introducing a proximal regularization term that penalizes divergence from the global model to stabilize local training considering data heterogeneity. In this work, we utilized the Brain Tumor MRI Dataset from Kaggle and trained the model to classify four brain tumors (BT), namely glioma, meningioma, pituitary tumor, and no-tumor class. Experiments were conducted for ten communication rounds, with each client training the model independently based on its local dataset and without sharing data. Results revealed that the method consistently outperformed accuracy, recall and F1-score, further validating the capabilities of the proposed framework in effectively handling data heterogeneity while conserving data privacy. The global model outperformed models that had been centralized and trained on a smaller, common dataset observed in FL scenarios to improve the potential for collaborative medical diagnosis. This method is especially suitable for medical applications with strict privacy regulations, as it provides an approach to linking heterogeneous data from multiple healthcare institutions.

12 June 2019 in Journal of Thermal Analysis and Calorimetry
Verified
Journal Article
Closed access
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Mohsen SarafrazMohsen Sarafraz
Mohsen Sarafraz
ITI. Tlili
I. Tlili
ZTZhe Tian
Zhe Tian
Ahmad Raza KhanAhmad Raza Khan
Ahmad Raza Khan
Mohammad Reza SafaeiMohammad Reza Safaei
Mohammad Reza Safaei