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Communications in Theoretical Physics 2024年第8期76卷 1-10页

作者： Weaam Alhejaili Emad A Az-Zo’bi Rasool Shah S A El-tantawy Department of Mathematical Sciences College of SciencePrincess Nourah bint Abdulrahman UniversityPO Box 84428Riyadh 11671Saudi Arabia Department Mathematics and Statistics Mutah UniversityAl-KarakJordan Department of Computer Science and Mathematics Lebanese American UniversityBeirutLebanon Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Department of Physics Faculty of ScienceAl-Baha UniversityAl-Baha P.O.Box 1988Saudi Arabia

The current investigation examines the fractional forced Korteweg-de Vries(FF-KdV) equation,a critically significant evolution equation in various nonlinear branches of science. The equation in question and other associated equations are widely acknowledged for their broad applicability and potential for simulating a wide range of nonlinear phenomena in fluid physics, plasma physics, and various scientific domains. Consequently, the main goal of this study is to use the Yang homotopy perturbation method and the Yang transform decomposition method, along with the Caputo operator for analyzing the FF-KdV equation. The derived approximations are numerically examined and discussed. Our study will show that the two suggested methods are helpful, easy to use, and essential for looking at different nonlinear models that affect complex processes.

关键词： forced fractional KdV equation Caputo operator Yang homotopy perturbation method Yang transform decomposition method solitons

Multiple scales method for analyzing a forced damped rotational pendulum oscillatorwithgallows

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Communications in Theoretical Physics 2024年第5期76卷 58-67页

作者： Haifa A Alyousef Alvaro H Salas B M Alotaibi S A El-tantawy Department of Physics College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia Department of Mathematics and Statistics Universidad Nacional de ColombiaFIZMAKO Research GroupColombia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversityAl-Baha 1988Saudi Arabia

This study reports the analytical solution for a generalized rotational pendulum system with gallows and periodic excited *** multiple scales method(MSM)is applied to solve the proposed *** types of rotational pendulum oscillators are studied and talked about in *** include the forced damped rotating pendulum oscillator with gallows,the damped standard simple pendulum oscillator,and the damped rotating pendulum oscillator without *** MSM first-order approximations for all the cases mentioned are derived in *** obtained results are illustrated with concrete numerical *** first-order MSM approximations are compared to the fourth-order Runge-Kutta(RK4)numerical ***,the maximum error is estimated for the first-order approximations obtained through the MSM,compared to the numerical approximations obtained by the RK4 ***,we conducted a comparative analysis of the outcomes obtained by the used method(MSM)and He-MSM to ascertain their respective levels of *** proposed method can be applied to analyze many strong nonlinear oscillatory equations.

关键词： rotational pendulum system multiple scales method approximate solution damped oscillations forced pendulum with gallows he-multiple scales method

Novel CYP1B1 mutations and a possible prognostic use for surgical management of congenital glaucoma

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International Journal of Ophthalmology(English edition) 2019年第4期12卷 607-614页

作者： Mohamed M.Khafagy Nadia El-Guendy marwa a tantawy Mohamed A.Eldaly Hala M.Elhilali Abdel Hady A.Abdel Wahab Ophthalmology Department Faculty of Medicine Cairo University Cancer Biology Department National Cancer Institute Cairo University Research Department Children's Cancer Hospital

AIM: To identify CYP1B1 gene mutations and evaluate their possible role as a prognostic factor for success rates in the surgical management of Egyptian congenital glaucoma ***: Totally 42 eyes of 29 primary congenital glaucoma patients were operated on with combined trabeculotomy/trabeculectomy with mitomycin-C and followed up at 1 d, 1 wk, 1, 6 and 12 mo postoperatively. Genomic DNA was extracted from peripheral blood leukocytes. Coding regions of CYP1B1 gene were amplified using 13 pairs of primers, screened for mutations using single-strand conformation polymorphism followed by sequencing of both strands. Efficacy of the operation was graded as either a success [maintaining intraocular pressure(IOP) less than 21 mm Hg with or without antiglaucoma medication], or a failure(IOP more than 21 mm Hg with topical antiglaucoma medications). RESULTS: Seven novel mutations out of a total of 15 different mutations were found in the CYP1B1 genes of 14 patients(48.2%). The presence of CYP1B1 gene mutations did not correlate with the failure of the surgery(P=0.156, odds ratio=3.611, 95%CI, 0.56 to 22.89); while the positive consanguinity strongly correlated with failure of the initial procedure(P=0.016, odds ratio=11.25, 95%CI, 1.57 to 80.30). However, the Kaplan-Meier survival analysis revealed a significantly lower time of IOP control in the subgroup with mutations in CYP1B1 versus the congenital primary glaucoma group without mutations(log rank test, P=0.015).CONCLUSION: Seven new CYP1B1 mutations are identified in Egyptian patients. Patients harboring confirmed mutations suffered from early failure of the initial surgery. CYP1B1 mutations could be considered as a prognostic factor for surgery in primary congenital glaucoma.

关键词： CYP1B1 mutations primary congenital glaucoma intraocular pressure trabeculotomy/trabeculectomy with mitomycin-C.

Explainable Conformer Network for Detection of COVID-19 Pneumonia from Chest CT Scan: From Concepts toward Clinical Explainability

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Computers, Materials & Continua 2024年第1期78卷 1171-1187页

作者： Mohamed Abdel-Basset Hossam Hawash Mohamed Abouhawwash S.S.Askar Alshaimaa A.tantawy Faculty of Computers and Informatics Zagazig UniversityZagazig44519Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast LansingMI48824USA Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of Statistics and Operations Research College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia

The early implementation of treatment therapies necessitates the swift and precise identification of COVID-19 pneumonia by the analysis of chest CT *** study aims to investigate the indispensable need for precise and interpretable diagnostic tools for improving clinical decision-making for COVID-19 *** paper proposes a novel deep learning approach,called Conformer Network,for explainable discrimination of viral pneumonia depending on the lung Region of Infections(ROI)within a single modality radiographic CT ***,an efficient U-shaped transformer network is integrated for lung image ***,a robust transfer learning technique is introduced to design a robust feature extractor based on pre-trained lightweight Big Transfer(BiT-L)and finetuned on medical data to effectively learn the patterns of infection in the input ***,this work presents a visual explanation method to guarantee clinical explainability for decisions made by Conformer *** evaluation of real-world CT data demonstrated that the diagnostic accuracy of ourmodel outperforms cutting-edge studies with statistical *** Conformer Network achieves 97.40% of detection accuracy under cross-validation *** model not only achieves high sensitivity and specificity but also affords visualizations of salient features contributing to each classification decision,enhancing the overall transparency and trustworthiness of our *** findings provide obvious implications for the ability of our model to empower clinical staff by generating transparent intuitions about the features driving diagnostic decisions.

关键词： Deep learning COVID-19 multi-modal medical image fusion diagnostic image fusion

Hepatoblastoma in Developing Countries;Eight Years of Single Centre Experience

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Journal of Cancer Therapy 2018年第10期9卷 793-806页

作者： Sayed Abdelahamid Reham Abdelaziz Khedr Madeeha El Wakeel Alaa Younes Gehad Ahmed Naglaa Elkinaai marwa tantawy Hanafy Ahmed Hafez Department of Pediatric Hematology/Oncology National Cancer Institute Cairo University CCHE Cairo Egypt Department of Radiodiagnosis National Cancer Institute Cairo University CCHE Cairo Egypt Department of Surgical Oncology National Cancer Institute Cairo University CCHE Cairo Egypt Department of Surgery Faculty of Medicine Helwan University Cairo Egypt Department of Surgical Pathology National Cancer Institute Cairo University Cairo Egypt Department of Clinical Research CCHE Cairo Egypt

Background and objectives: Although hepatoblastoma (HB) is a rare childhood tumor and constitutes only 0.9% of all pediatric cancers, there was an obvious improvement in risk stratification and prognosis over the last two decades. This study aimed to assess the outcome of HB patients treated in our center and to investigate the impact of different prognostic factors on the survival of these patients. Patients and methods: This was a retrospective study included newly diagnosed patients with HB presented to the Children Cancer Hospital Egypt (CCHE 57357), from July 2007 to June 2015. Patient’s data were analyzed for the clinical characteristics and survival outcome of the included patients. Results: One hundred twenty-four children were included during the study period with a median age of 14 months. The tumor was found occupying the entire liver in 25 patients (20%);while it was confined to one lobe in 80% of them, portal vein thrombosis was diagnosed in 10 patients, and there were 30 patients (24%) had metastatic disease at presentation. Only five patients (4%) underwent primary surgical excision, and all of them were grossly excised (stage I);77/119 (64.7%) experienced delayed surgery after two to six courses (median, four courses) of C5VD and the overall resection rate was 66%. There were 42 patients (35.3%) failed to do surgical excision either because they still had evident metastatic disease with poor chemotherapy response, or because their tumor remained unresectable after six courses of chemotherapy. The 3-year event-free and overall survivals for the whole studied patients were 45.7% (95% CI, 36.9% - 56.7%), and 66.7% (95% CI, 57.1% - 77.8%) respectively. The 3-year EFS and OS were significantly better in those who underwent surgical excision (68.63% and 80.74% respectively, P-value 0.001). Also, the survival rates were significantly affected by the presence of metastatic disease at presentation, tumor stage and initial risk grouping of the studied patients

关键词： Hepatoblastoma Risk Factors Survival

Novel anlytical solution to the damped Kawahara equation and its application for modeling the dissipative nonlinear structures in a fluid medium

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Journal of Ocean Engineering and Science 2022年第5期7卷 492-497页

作者： Noufe H.Aljahdaly S.A.El-tantawy Department of Mathematics Faculty of Sciences and Arts-Rabigh campusKing Abdulaziz UniversityJeddahSaudi Arabia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia

A novel approximate analytical solution to the linear damped Kawahara equation using a suitable hypothesis is reported for the first *** on the exact solutions(such as solitary waves,cnoidal waves,etc.)of the undamped Kawahara equation,the dissipative nonlinear structures like dissipative solitons and cnoidal waves are *** obtained solution is considered a general solution,i.e.,it can be applied for studying the properties of all dissipative traveling waves described by the linear damped Kawahara *** technique is not limited to solve the linear damped Kawahara equation only,but it can be used for solving a large number of non-integrable evolution equations related to the realistic natural ***,the maximum global residual error in the whole space-time domain is estimated for checking the accuracy of the obtained *** obtained solutions can help many researchers in explaining the ambiguities about the mechanisms of propagation of nonlinear waves in complex systems such as seas,oceans,plasma physics,and much more.

关键词： Semi-analytical solutions Damped Kawahara equation A collisional plasma Dissipative Kawahara solitons and cnoidal waves

The phase shift analysis of the colliding dissipative KdV solitons

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Journal of Ocean Engineering and Science 2022年第6期7卷 521-527页

作者： Wedad Albalawi S.A.El-tantawy Sadah A.Alkhateeb Department of Mathematical Sciences College of SciencePrincess Nourah bint Abdulrahman UniversityRiyadhSaudi Arabia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia Mathematics Department Faculty of ScienceUniversity of JeddahJeddahSaudi Arabia

In this work,the head-on collisions of the non-stationary dissipative soliton in ultracold neutral plasmas(UNPs)are *** extended Poincare-Lighthill-Kuo(PLK)approach is adopted for reducing the fluid equations of the UNPs to two-counterpropagating damped Korteweg-de Vries(dKdV)*** dKdV equation is not an integrable Hamiltonian system,i.e.,does not have an exact ***,one of the main goal of this paper is to find a new general approximate analytical solution to the dKdV equation for investigating the mechanism of the propagation and interaction of the non-stationary dissipative *** residual error is estimated for checking the accuracy of the new obtained *** approximate analytical soliton solutions are adopted for deriving the temporal phase shifts after the *** impact of physical parameters on the nonstationary dissipative soliton profile and the temporal phase shifts is *** obtained results will contribute to understand the mechanism of propagation and interaction of many nonlinear phenomena in different nonlinear mediums such as ocean,sea,optical fiber,plasma physics,etc.

关键词： Dissipative soliton collisions Damped Korteweg-de Vries equation The extended Poincare-Lighthill-Kuo method The temporal phase shifts

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Journal of Ocean Engineering and Science 2022年第4期7卷 321-326页

作者： H.I.Abdel-Gawad M.tantawy M.S.Mani Rajan Department of Mathematics Faculty of ScienceCairo UniversityGizaEgypt Department of Basic Sciences Faculty of EngineeringOctober 6 UniversityGizaEgypt Department of Physics University College of EngineeringAnna UniversityRamanathapuramIndia

The oscillatory motion on the ocean surface is a combination of a variety of different types of *** regularized waves are among ***,it is shown that they arise as solutions of the(1+2)-dimensional Benjamin-Bona-Mahony equation(BBME).Numerous works on(1+1)-dimensional BBME were carried in the *** this paper,we consider the(1+2)-dimensional non-autonomous BBME,with time-dependent *** model equation is completely *** objective is to find the exact solutions and investigate the relevant *** solve this issue,the extended unified method is used to find the exact solutions in the form of semi-self similar and self similar *** solve this issue,simi-larity transformations are ***,the generalized unified methods(GUM)are also used in the symbolic *** numerical results of these solutions are evaluated and are shown *** wave patterns of regularized waves in shallow water,near ocean shores,are ***-tory waves and vector of lumps with troughs are *** time-dependent coefficients are used,here,to control the different wave patterns that take the forms of the multi-U shaped wave with basins with a *** pattern formation occurs,which is in the form of two layers of lumps with *** tunneling is also *** waves patterns are *** stability of the steady state solutions is *** is found that the stability depends significantly on the dispersion coefficient.

关键词： (1+2)-dimensional Benjamin-Bona-Mahony equation Extended unified method Wave patterns Similariton solutions

On the dynamics of nonlinear propagation and interaction of the modified KP solitons in multicomponent complex plasmas

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Journal of Ocean Engineering and Science 2022年第6期7卷 555-564页

作者： Muhammad Shohaib W.Masood R.Jahangir M.Siddiq Sadah A.Alkhateeb S.A.El-tantawy COMSATS University Islamabad Islamabad CampusPark RoadChak ShahzadIslamabad 44000Pakistan National Center for Physics(NCP) Quaid-i-Azam University CampusShahdrah Valley RoadIslamabad44000Pakistan Mathematics Department Faculty of ScienceUniversity of JeddahJeddahSaudi Arabia Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia

Dust-acoustic waves(DAWs)are analyzed in the small amplitude limit in a collisionless unmagnetized dusty plasma whose constituents are inertial dust grains,massless ions expressed by the generalized(r,q)distribution and inertialess Maxwellian electrons using the fluid theory of *** modified Kadomtsev-Petviashvili(mKP)equation is derived at a critical plasma condition for which the quadratic nonlinearity *** propagation of single soliton and interaction of two solitons are analyzed for the mKP equation in the context of plasma physics by employing Hirota bilinear *** effects of the flatness parameter rand tail parameter q of the ions on the frequency of the DAWs are studied and the comparison with Maxwellian and kappa distributions is *** the plasma parameters corresponding to the Saturn’s E-ring,the range of electric field amplitude for dust-acoustic solitary waves(DASWs)for different ion distributions is calculated and is shown to agree very well with the Cassini Wideband Receiver(WBR)*** interaction time of two DASWs for non-Maxwellian ion distributions is estimated and shown to be fastest for the(r,q)distributed *** interesting feature of the interaction between compressive solitons with their rarefactive counterparts is also discussed in detail.

关键词： Non-Maxwellian complex plasmas Dust-acoustic solitary waves Hirota bilinear method Modified Kadomtsev-Petviashvili equation Solitons interaction

On controlled propagation of nonautonomous dispersive coupled Whitham-Broer-Kaup equation in shallow water

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Journal of Ocean Engineering and Science 2017年第3期2卷 217-222页

作者： M.tantawy Department of Mathematics Faculty of ScienceCairo UniversityGizaEgypt

In this paper,the dispersive coupled Whitham-Broer-Kaup(DCWBK)equation with time-dependent coefficients describing the propagation of the shallow water waves are *** propagation of solitons and elliptic(or chirped)waves can be manipulated by suitable variations of the dispersion ***,controllable transmission of the surface waves for soliton similariton pairs with the snoidal backgrounds is *** is found that,when the dispersion coefficient is taken as increasing,the velocity is increasing with the dispersion coefficient *** this holds vice versa for the height of propagation wave.

关键词： Dispersive coupled Whitham-Broer-Kaup(DCWBK)equation Unified method(UM) Dispersion coefficient Controlled