Shafiq Ahmad

Dr. Shafiq Ahmad

king saud university
orcid

Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

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

Representative Publications

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13 February 2018 in IEEE Communications Magazine
Verified
Journal Article
Closed access
JWJiafu Wan
Jiafu Wan
Baotong ChenBaotong Chen
Baotong Chen
MIMuhammad Imran
Muhammad Imran
Fei TaoFei Tao
Fei Tao
DLDi Li
Di Li
Shafiq AhmadShafiq Ahmad
Shafiq Ahmad
The cyber-physical production system (CPPS), which combines information communication technology, cyberspace virtual technology, and intelligent equipment technology, is accelerating the path of Industry 4.0 to transform manufacturing from traditional to intelligent. The Industrial Internet of Things integrates the key technologies of industrial communication, computing, and control, and is providing a new way for a wide range of manufacturing resources to optimize management and dynamic scheduling. In this article, OLE for process control technology, software defined industrial network, and device-to-device communication technology are proposed to achieve efficient dynamic resource interaction. Additionally, the integration of ontology modeling with multiagent technology is introduced to achieve dynamic management of resources. We propose a load balancing mechanism based on Jena reasoning and Contract-Net Protocol technology that focuses on intelligent equipment in the smart factory. Dynamic resources management for IoT-based manufacturing provides a solution for complex resource allocation problems in current manufacturing scenarios, and provides a technical reference point for the implementation of intelligent manufacturing in Industry 4.0.

31 July 2021 in Molecules
Verified
Journal Article
Open access
PDF file
HAHafiz Ahmed
Hafiz Ahmed
YIYasir Iqbal
Yasir Iqbal
MAMuhammad Hammad Aziz
Muhammad Hammad Aziz
MAMuhammad Atif
Muhammad Atif
ZBZahida Batool
Zahida Batool
HAHijaz Ahmad
Hijaz Ahmad
Metal oxide nanoparticles synthesized by the biological method represent the most recent research in nanotechnology. This study reports the rapid and ecofriendly approach for the synthesis of CeO2 nanoparticles mediated using the Abelmoschus esculentus extract. The medicinal plant extract acts as both a reducing and stabilizing agent. The characterization of CeO2 NPs was performed by scanning electron microscopy (SEM), X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), and Fourier transform infrared spectroscopy (FTIR). The in vitro cytotoxicity of green synthesized CeO2 was assessed against cervical cancerous cells (HeLa). The exposure of CeO2 to HeLa cells at 10–125 µg/mL caused a loss in cellular viability against cervical cancerous cells in a dose-dependent manner. The antibacterial activity of the CeO2 was assessed against S. aureus and K. pneumonia. A significant improvement in wound-healing progression was observed when cerium oxide nanoparticles were incorporated into the chitosan hydrogel membrane as a wound dressing.

20 March 2018 in IEEE Access
Verified
Journal Article
Open access
Shamsul HudaShamsul Huda
Shamsul Huda
KLKevin Liu
Kevin Liu
MAMohamed Almorsy Abdelrazek
Mohamed Almorsy Abdelrazek
AIAmani Ibrahim
Amani Ibrahim
SASultan Alyahya
Sultan Alyahya
Shafiq AhmadShafiq Ahmad
Shafiq Ahmad
Software systems are now ubiquitous and are used every day for automation purposes in personal and enterprise applications; they are also essential to many safety-critical and mission-critical systems, e.g., air traffic control systems, autonomous cars, and SCADA systems. With the availability of massive storage capabilities, high speed Internet, and the advent of Internet of Things (IoT) devices, modern software systems are growing in both size and complexity. Maintaining a high quality of such complex systems while manually keeping the error rate at a minimum is a challenge. Therefore, automated detection of faulty components in a software system is important during software development and also post-delivery. Fault detection models usually needs to be trained on a labeled-balanced dataset with both faulty and non-faulty samples. Earlier work, e.g. Mohsin et al. (2016), showed that most real fault detection training dataset are imbalanced. Thereby, the trained model gets over-fitted and classifies faulty components as non-faulty components. The consequence of a high false negative rate is cumulative and results in generating more errors when using the model in other software systems – never seen before, which is very expensive. In this paper, we propose a software defect prediction ensemble model which considers the class imbalance problem in real software datasets. We use different oversampling techniques to build an ensemble classifier that can reduce the effect of low minority samples in the defective data. The proposed approach is verified using PROMISE software engineering dataset. The results show that our ensemble oversampling technique can more greatly reduce the false negative rate compared to the standard classification techniques and identify the faulty components more accurately resulting in a less expensive detection system (lowering the rate of non-faulty predictions of faulty modules).

13 February 2018 in IEEE Communications Magazine
Verified
Journal Article
Closed access
MRMuhammad Habib ur Rahman
Muhammad Habib ur Rahman
EAEjaz Ahmed
Ejaz Ahmed
IYIbrar Yaqoob
Ibrar Yaqoob
IHIbrahim Abaker Targio Hashem
Ibrahim Abaker Targio Hashem
MIMuhammad Imran
Muhammad Imran
Shafiq AhmadShafiq Ahmad
Shafiq Ahmad
The unprecedented proliferation of miniaturized sensors and intelligent communication, computing, and control technologies have paved the way for the development of the Industrial Internet of Things. The IIoT incorporates machine learning and massively parallel distributed systems such as clouds, clusters, and grids for big data storage, processing, and analytics. In IIoT, end devices continuously generate and transmit data streams, resulting in increased network traffic between device-cloud communication. Moreover, it increases in-network data transmissions. requiring additional efforts for big data processing, management, and analytics. To cope with these engendered issues, this article first introduces a novel concentric computing model (CCM) paradigm composed of sensing systems, outer and inner gateway processors, and central processors (outer and inner) for the deployment of big data analytics applications in IIoT. Second, we investigate, highlight, and report recent research efforts directed at the IIoT paradigm with respect to big data analytics. Third, we identify and discuss indispensable challenges that remain to be addressed for employing CCM in the IIoT paradigm. Lastly, we provide several future research directions (e.g., real-time data analytics, data integration, transmission of meaningful data, edge analytics, real-time fusion of streaming data, and security and privacy).

14 July 2021 in IEEE Access
Verified
Journal Article
Open access
BHBasharat Hussain
Basharat Hussain
MAMuhammad Khalil Afzal
Muhammad Khalil Afzal
Shafiq AhmadShafiq Ahmad
Shafiq Ahmad
AMAlmetwally M. Mostafa
Almetwally M. Mostafa
Facilitating citizens with accurate traffic flow prediction increases the quality of life. Roadside sensors and devices are used to capture live streams of huge data and the Internet of Things (IoT) is becoming popular for the deployment of effective Intelligent Transportation Systems (ITS). Traffic flow prediction from the live datastreams require building a data-driven model. This is a challenging task and has attracted researchers for better interpretation of the traffic characteristics. The core problem in traffic prediction is modeling a diversity of traffic trends and unpredictable flow variations with temporal dependencies. Initially, statistical and shallow neural network models were applied to some extent. Recently, deep learning has come up with proven and promising outcomes. Gated Recurrent Unit (GRU) is a variation of recurrent neural networks used effectively for traffic flow prediction. Like other deep networks, GRU uses hyperparameters and a sliding window time-steps mechanism to prepare and tune the model. Better tuning for hyperparameters and search for optimal window size is a tedious process. In this research work, we present an algorithm for hyperparameters tuning along with sliding window steps optimization. Results obtained on a real-time public traffic dataset show a higher capability of the proposed method to reduce the error and an average gain of the optimized model over the untuned network is 4.5%. Furthermore, we apply the optimal hyperparameters obtained in the experiment to other deep learning models and present that our approach improves prediction accuracy and stability.

19 October 2024 in Alexandria Engineering Journal
Verified
Journal Article
Open access
SKSathish Kumar
Sathish Kumar
RCRavikumar Chinthaginjala
Ravikumar Chinthaginjala
Shafiq AhmadShafiq Ahmad
Shafiq Ahmad
TKTaehoon Kim
Taehoon Kim