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A Compact 28 GHz Millimeter Wave Antenna for Future Wireless Communication

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Computers, Materials & Continua 2022年第7期72卷 301-314页

作者： Shahid Khan Adil bashir Haider Ali Abdul Rauf Mohamed Marey hala Mostafa Ikram Syed LCOMS ASECUniversity de LorraineMetz57070France Department of Electrical and Computer Engineering Comsats University IslamabadAbbottabad Campus22060Pakistan Electrical Engineering Department Bahauddin Zakariya UniversityMultan60800Pakistan Department of Electronics Technology University of TechnologyNowshera24100Pakistan Department of Electrical Engineering National University of Sciences and TechnologyH-12Islamabad44000Pakistan Smart Systems Engineering Laboratory College of EngineeringPrince Sultan UniversityRiyadh11586Saudi Arabia Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Computer Software Engineering Military College of SignalsNational University of Sciences and TechnologyIslamabad44000Pakistan

This article presents a novel modified chuck wagon dinner bell shaped millimeter wave(mm-wave)antenna at 28 *** proposed design has ultra-thin Rogers 5880 substrate with relative permittivity of *** design consists of T shaped resonating elements and two open ended side *** desired 28 GHz frequency response is achieved by careful parametric modeling of the proposed *** maximum achieved single element gain at the desired resonance frequency is 3.45 *** efficiency of the proposed design over the operating band is more than 88%.The impedance bandwidth achieved for−10 dB reference value is nearly 2.9 *** proposed antenna is transformed into four element linear array which increases the gain up to 10.5 *** fabricated prototype is tested for the measured *** is observed that measured results closely match the simulated *** considering its simple structure and focused radiation patterns,the proposed design is well suited for IoT(Internet of Things),mmWave microwave sensing,5G and future RF(Radio Frequency)frontends.

关键词： RF front-ends mmWave partial ground plane 28 GHz IoT 5G antenna

Intelligent Multiclass Skin Cancer Detection Using Convolution Neural Networks

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Computers, Materials & Continua 2021年第10期69卷 831-847页

作者： Reham Alabduljabbar hala Alshamlan Department of Information Technology College of Computer and Information SciencesKing Saud UniversityRiyadhSaudi Arabia

The worldwide mortality rate due to cancer is second only to cardiovascular *** discovery of image processing,latest artificial intelligence techniques,and upcoming algorithms can be used to effectively diagnose and prognose cancer faster and reduce the mortality *** applying these latest techniques has increased the survival chances during recent *** research community is making significant continuous progress in developing automated tools to assist dermatologists in decision *** datasets used for the experimentation and analysis are ISBI 2016,ISBI 2017,and HAM *** this work pertained models are used to extract the efficient *** pertained models applied are ResNet,InceptionV3,and classical feature extraction *** that,efficient preprocessing is conducted on dermoscopic images by applying various data augmentation ***,for classification,convolution neural networks were *** classify dermoscopic images on HAM 1000 Dataset,the maximum attained accuracy is 89.30%for the proposed *** other parameters for measuring the performance attained 87.34%(Sen),86.33%(Pre),88.44%(F1-S),and 11.30%false-negative rate(FNR).The class with the highest TP rate is 97.6%for Melanoma;whereas,the lowest TP rate was for the Dermatofibroma *** dataset ISBI2016,the accuracy achieved is 97.0%with the proposed classifier,whereas the other parameters for validation are 96.12%(Sen),97.01%(Pre),96.3%(F1-S),and further 3.7%(FNR).For the experiment with the ISBI2017 dataset,Sen,Pre,F1-S,and FNR were 93.9%,94.9%,93.9%,and 5.2%,respectively.

关键词： Convolution neural networks skin cancer artificial intelligence dermoscopy feature extraction classification

Information security through controlled quantum teleportation networks

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Digital Communications and Networks 2020年第4期6卷 463-470页

作者： hala Hamdoun Alaa Sagheer Center for Artificial Intelligence and RObotics(CAIRO) Department of Computer ScienceAswan UniversityAswanEgypt Department of Computer Science College of Computer Science and Information TechnologyKing Faisal UniversitySaudi Arabia

Information security is the backbone of current intelligent systems,such as the Internet of Things(IoT),smart grids,and Machine-to-Machine(M2M)*** increasing threat of information security requires new models to ensure the safe transmission of information through such ***,quantum systems have drawn much attention since they are expected to have a significant impact on the research in information *** paper proposes a quantum teleportation scheme based on controlled multi-users to ensure the secure information transmission among *** teleportation is an original key element in a variety of quantum information tasks as well as quantum-based technologies,which plays a pivotal role in the current progress of quantum computing and *** the proposed scheme,the sender transmits the information to the receiver under the control of a third user or ***,we show that the efficiency of the proposed scheme depends on the properties of the transmission channel and the honesty of the *** with various teleportation scheme presented recently in the literature,the most important difference in the proposed scheme is the possibility of suspicion about the honesty of the controller and,consequently,taking proper precautions.

关键词： Information security Machine-to-machine communication Intelligent secure systems Quantum teleportation Quantum networks

Enhancing Cancer Classification through a Hybrid Bio-Inspired Evolutionary Algorithm for Biomarker Gene Selection

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Computers, Materials & Continua 2024年第4期79卷 675-694页

作者： hala AlShamlan halah AlMazrua Department of Information Technology College of Computer and Information SciencesKing Saud UniversityP.O.Box 145111Riyadh4545Saudi Arabia

In this study,our aim is to address the problem of gene selection by proposing a hybrid bio-inspired evolutionary algorithm that combines Grey Wolf Optimization(GWO)with Harris Hawks Optimization(HHO)for feature *** for utilizingGWOandHHOstems fromtheir bio-inspired nature and their demonstrated success in optimization *** aimto leverage the strengths of these algorithms to enhance the effectiveness of feature selection in microarray-based cancer *** selected leave-one-out cross-validation(LOOCV)to evaluate the performance of both two widely used classifiers,k-nearest neighbors(KNN)and support vector machine(SVM),on high-dimensional cancer microarray *** proposed method is extensively tested on six publicly available cancer microarray datasets,and a comprehensive comparison with recently published methods is *** hybrid algorithm demonstrates its effectiveness in improving classification performance,Surpassing alternative approaches in terms of *** outcomes confirm the capability of our method to substantially improve both the precision and efficiency of cancer classification,thereby advancing the development ofmore efficient treatment *** proposed hybridmethod offers a promising solution to the gene selection problem in microarray-based cancer *** improves the accuracy and efficiency of cancer diagnosis and treatment,and its superior performance compared to other methods highlights its potential applicability in realworld cancer classification *** harnessing the complementary search mechanisms of GWO and HHO,we leverage their bio-inspired behavior to identify informative genes relevant to cancer diagnosis and treatment.

关键词： Bio-inspired algorithms bioinformatics cancer classification evolutionary algorithm feature selection gene expression grey wolf optimizer harris hawks optimization k-nearest neighbor support vector machine

Diverse features of magnetization curves of uniaxial crystals：A simulation study

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Chinese Physics B 2017年第1期26卷 454-465页

作者： hala A.Sobh Samy H.Aly Department of Physics Faculty of Science at Damietta Damietta University P. O. Box 89 New Damietta 34517 Egypt

We present a simulation of the magnetization curves, energy, probability, and torque landscapes of uniaxial systems with up to five anisotropy constants. The total energy used in the simulation is the sum of the anisotropy and Zeeman energies. The exchange interaction is not considered in the present work in which we treat single-domain-particle systems within a classical mechanics-based model. Diverse features of the calculated magnetization curves are highlighted for the studied systems. These diverse features are strongly dependent on the sign and magnitude of the simulation *** model is versatile enough to handle both hypothetical and real material systems, e.g. HoFe（11）Ti and Y2Co（17）.

关键词： magnetization curve saturation moments magnetic anisotropy ferromagnetic metals and alloys

Nucleotide Sequence Assessment of Four ORFs of Citrus Tristeza Virus: Evidence of Recombination

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Phyton-International Journal of Experimental Botany 2023年第3期92卷 691-705页

作者： Adel A.Rezk hala A.Amin Department of Agricultural Biotechnology College of Agricultural and Food ScienceKing Faisal UniversityAl-Ahsa31982Saudi Arabia Virus and Phytoplasma Research Department Plant Pathology Research InstituteAgricultural Research Center(ARC)Giza12619Egypt

Citrus Tristeza Virus(CTV),usually occurs in nature as a mixture of *** naturally infected citrus(Citrus sinensis)trees grafted on sour orange rootstock were collected from three citrus growing governorates in Egypt(Sharqia,Qalyubia and Garbia).In this study,RT-PCR,Single-Strand Conformation Polymorphism(SSCP)and nucleotide sequence analysis were used for four independent CTV genomic regions(p65,p18,p20,and p23)to detect and assess the sequence and genetic variabilities among CTV Egyptian *** products(650 bp)for the CTV p23 gene obtained from the selected isolates were used for the SSCP analysis and DNA *** patterns of p23 gene for individual isolates yielded different complex haplotype *** sequence analysis of p23 region amplified from six isolates under study revealed that p23 shared high nucleotide identity 98.7%with T36 isolate from USA,*** analysis of p23 gene indicated a close evolutionary relationship between all examined isolates and Qaha isolate(T36 isolate group),suggesting that they may have originated from closely related *** sequence analysis of the three genes located on CTV 3′-coterminal overhang,p18,p20 and p65,amplified from isolate A3,Sharqia governorate,revealed that the p18,p65,and p20 genes were related to the T3-KB isolate from South Africa with 99%–100%sequence *** relationship analysis for p65,p18 and p20 ORFs clustered the current A3 isolate with T3 genotype *** recombination analysis identified three of six isolates from Sharqia,and Garbia as potential recombinant for p23 *** isolates T36 and T3 were identified as major donors for recombination events in isolate *** results concluded that p23 ORF likely to be as a hotspot region for recombination and originated through recombination *** current study indicated that recombination is an important factor for the origin of CTV strains in Egypt.

关键词： Citrus Tristeza Virus hotspot region phylogenetic relationship analysis sequence comparison SSCP analysis

Preliminary Study of a Hybrid Helicon-ECR Plasma Source

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Plasma Science and Technology 2016年第8期18卷 832-836页

作者： A.M.hala L.OKSUZ ZHU Ximing The National Center for Applied Physics Material Science Research InstituteKing Abdul Aziz City for Science and Technology(KACST) Süleyman Demirel University Science and Literature FacultyPhysics Department Institute for Plasma and Atomic Physics Ruhr University

A new type of hybrid discharge is experimentally investigated in this work. A helicon source and an electron cyclotron resonance（ECR） source were combined to produce plasma. As a preliminary study of this type of plasma, the optical emission spectroscopy（OES） method was used to obtain values of electron temperature and density under a series of typical conditions. Generally,it was observed that the electron temperature decreases and the electron density increases as the pressure increased. When increasing the applied power at a certain pressure, the average electron density at certain positions in the discharge does not increase significantly possibly due to the high degree of neutral depletion. Electron temperature increased with power in the hybrid *** mechanisms of these preliminary observations are discussed.

关键词： helicon plasma ECR hybrid discharge

Prevalence and factors associated with irritable bowel syndrome among university students in Lebanon:Findings from a cross-sectional study

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World Journal of Gastroenterology 2015年第12期21卷 3628-3635页

作者： Christy Costanian hala Tamim Shafika Assaad School of Kinesiology and Health Science York University Lebanese University Faculty of Sciences

AIM: To describe the bowel habits and the prevalence of irritable bowel syndrome(IBS) and to investigate the influence of health behavior and social factors on IBS prevalence in university students. METHODS: This cross-sectional study was conducted at five major universities in Greater Beirut and its suburbs, between February and June 2014. Using a convenience sample, a total of 813 students aged 18 years old and above participated in this study. Participants were asked to complete a comprehensive anonymous questionnaire which detailed characteristics on socio-demographic, health-related, and lifestyle factors, as well as IBS. The ROME Ⅲ criteria were used as a tool to ascertain IBS. A χ2 test was used to determine differences between categorical variables; stepwise logistic regression was used to measure the association between IBS and its risk ***: An overall prevalence of IBS of 20% was recorded among university students. The bivariate analysis showed that females were significantly more likely to report having IBS than males(29.1% vs 18.2%, P 2000) were almost 6 times more likely to report havingIBS than their ***: This is the first study to describe the nature of IBS among young adults in Lebanon. The prevalence of IBS among university students in our sample was higher than that reported in the West.

关键词： Irritable bowel syndrome Lebanon Social factors Pr

Emerging role of biosimilars in the clinical care of inflammatory bowel disease patients

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World Journal of Clinical Cases 2022年第14期10卷 4327-4333页

作者： hala Najeeb Farah Yasmin Salim Surani Department of Internal Medicine Dow University of Health SciencesKarachi 74200Pakistan Department of Medicine Texas A&M UniversityCollege StationTX 77843United States Department of Anesthesiology Mayo ClinicRochesterMN 55905United States

The increasing incidence of inflammatory bowel disease(IBD)globally has redirected the healthcare system's focus towards safe and affordable pharmacological *** inception of anti-tumor necrosis factor-α(TNF-α)had resulted in a trend shift from surgical ***,as the patents of approved anti-TNF-αdrugs expire,biological copies of the many approved products are in the *** most commonly used biosimilar for IBD has been infliximab,followed by Adalimumab biosimilars which have been approved in major countries across the *** biosimilars are approved on the basis of similarity of their reference product,the lack of real-world evidence of its safety in ulcerative colitis and Crohn’s disease patients has contributed to physicians’***,biosimilars are expected to reduce treatment costs and provide economic benefits.

关键词： Inflammatory bowel disease Biosimilars Anti-tumor necrosis factor Infliximab Adalimumab Ulcerative colitis Chrons disease