Alaa Khalifa

Dr. Alaa Khalifa

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Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

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

Representative Publications

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2 May 2024 in Applied Sciences
Verified
Journal Article
Open access
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AKAlaa Khalifa
Alaa Khalifa
WAWalaa M. Alayed
Walaa M. Alayed
Hesham ElbadawyHesham Elbadawy
Hesham Elbadawy
Rowayda SadekRowayda Sadek
Rowayda Sadek
Smart cities are now embracing the new frontier of urban living, with advanced technology being used to enhance the quality of life for residents. Many of these cities have developed transportation systems that improve efficiency and sustainability, as well as quality. Integrating cutting-edge transportation technology and data-driven solutions improves safety, reduces environmental impact, optimizes traffic flow during peak hours, and reduces congestion. Intelligent transportation systems consist of many systems, one of which is traffic sign detection. This type of system utilizes many advanced techniques and technologies, such as machine learning and computer vision techniques. A variety of traffic signs, such as yield signs, stop signs, speed limits, and pedestrian crossings, are among those that the traffic sign detection system is trained to recognize and interpret. Ensuring accurate and robust traffic sign recognition is paramount for the safe deployment of self-driving cars in diverse and challenging environments like the Arab world. However, existing methods often face many challenges, such as variability in the appearance of signs, real-time processing, occlusions that can block signs, low-quality images, and others. This paper introduces an advanced Lightweight and Efficient Convolutional Neural Network (LE-CNN) architecture specifically designed for accurate and real-time Arabic traffic sign classification. The proposed LE-CNN architecture leverages the efficacy of depth-wise separable convolutions and channel pruning to achieve significant performance improvements in both speed and accuracy compared to existing models. An extensive evaluation of the LE-CNN on the Arabic traffic sign dataset that was carried out demonstrates an impressive accuracy of 96.5% while maintaining superior performance with a remarkably low inference time of 1.65 s, crucial for real-time applications in self-driving cars. It achieves high accuracy with low false positive and false negative rates, demonstrating its potential for real-world applications like autonomous driving and advanced driver-assistance systems.

3 November 2023 in PeerJ Computer Science
Verified
Journal Article
Open access
PDF file
RSRowayda A. Sadek
Rowayda A. Sadek
AKAlaa Khalifa
Alaa Khalifa
MEMarwa M.A. Elfattah
Marwa M.A. Elfattah
The last two decades have seen the emergence of a brand-new kind of music known as digital brain stimulant, also known as instrumental music or music without lyrics, which mostly comprises entrainment beats. While listening to it has the same ability to affect the brain as taking medication, it also has the risk of having a negative impact or encouraging unwanted behavior. This sparked the interest of a large number of studies in the psychological and physiological effects of music’s brainwave entrainment beats on listeners. These studies started to categorize and examine how musical beats affected brainwave entrainment by looking at electroencephalogram (EEG) signals. Although this categorization represents a step forward for the early research efforts, it is constrained by the difficulty of having each musical track and conducting EEG tests on humans exposed to distortion due to noise in order to determine its influence. The work proposed in this article continues to explore this topic but in a novel, simple, accurate, and reliable categorization procedure based on the music signal elements themselves rather than dependent on EEG. VGGish and YAMNET based transfer deep learning models, are tuned to handle a straightforward, accurate real-time detector for the existence of the music beats inside music files with accuracy of 98.5 and 98.4, respectively. Despite the fact that they yield results that are equivalent, the YAMNET model is more suited for use with mobile devices due to its low power consumption and low latency. The article also proposes modified version of VGGish and YAMNET binary classifying models called BW-VGGish and BW-YAMNET respectively. The modification was to turn the binary classification into multi-classification. These multi-classifiers handle the classification of the influence of music beats (five different brain waves) on human brainwave entrainment with average accuracy of 94.5% and 94.5%, respectively. Since there was a lack of datasets addressing this kind of music, two datasets, the Brainwave Entrainment Beats (BWEB) dataset and the Brainwave Music Manipulation (BWMM) dataset, were generated for classification training and testing. The re-testing on a sample of music files that have their impact on brain waves (with their EEG) in an earlier study is done to strengthen the validity of the proposed work and to overcome the potential limitation of utilizing a music dataset that is not proved with its EEG. The success of the suggested models was demonstrated.

1 October 2023 in Journal of Communication Sciences and Information Technology
Verified
Journal Article
Open access
PDF file
AKAlaa Khalifa
Alaa Khalifa
RSRowayda A. Sadek
Rowayda A. Sadek
The Internet of Things has made smart homes a reality (IoT). A smart home is a place where people live that is equipped with various internet-enabled gadgets that enable online monitoring and remote control. In order to test and evaluate system performance during the design and development of smart home systems, simulation tools are required. Using Cisco Packet Tracer, a popular network simulation tool in the networking industry, a smart home simulation model is proposed in this paper. A home network connects the various actuators, sensors, and smart home appliances that make up the suggested model. Through a web interface, users can monitor and control smart home devices with the simulation model, which also offers real-time feedback on system performance. The recommended model also includes automatic modules that monitor temperature, motion, smoke, humidity, and solar panel control using smart batteries. A platform for testing and assessing a range of smart home applications, including energy management, health monitoring, and home security, is the suggested smart home simulation model. Because it provides researchers and students studying smart home systems with a realistic learning environment, the simulation model is beneficial for education. Additionally, this article compared the response times for communication between IOT devices using the HTTP and MQTT protocols and this comparison showed the MQTT protocol outperformed the http protocol with the small size messages.