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Existence results and behavior analysis for nonlinear age-dependent population dynamics problems with conformable fractional operator

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International Journal of Biomathematics 2024年第5期17卷 229-256页

作者： Hiba El Asraoui M'hamed El Omari Ali El Mfadel Khalid Hilal Laboratory of Applied Mathematics Scientific Computing Sultan Moulay Slimane university BP 523 Beni MellalMorocco

In this paper,we investigate the existence of solutions and analyze the large-time behavior for Gurtin-Maccamy population model involving conformable fractional *** a preliminary step,we construct a generic structure of the solution associated with our proposed model by utilizing some basic properties and tools of conformable fractional *** establish the existence of a unique solution of the given model with the given initial *** last,by using the upper and lower solutions for the characteristic equation,we define the upper and lower boundaries for the obtained solution and describe the large-time behavior of the total population.

关键词： Age-dependent population conformable fractional operator upper and lower boundary of the solution dynamics of populations

Efficient Technique for Image Cryptography Using Sudoku Keys

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Computers, Materials & Continua 2023年第10期77卷 1325-1353页

作者： M.A.P.Manimekalai M.Karthikeyan I.Thusnavis Bella Mary K.Martin Sagayam Ahmed A Elngar Unai Fernandez-Gamiz Hatıra Günerhan Department of ECE Karunya Institute of Technology and SciencesCoimbatore641114India Faculty of Computer and Artificial Intelligence Beni-Suef UniversityBeni-Suef62511Egypt Nuclear Engineering and Fluid Mechanics Department University of the Basque CountryBilbao48940Spain Department of Mathematics Faculty of EducationKafkas UniversityKars36100Turkey

This paper proposes a cryptographic technique on images based on the Sudoku *** is a number puzzle,which needs applying defined protocols and filling the empty boxes with *** a small size of numbers as input,solving the sudoku puzzle yields an expanded big size of numbers,which can be used as a key for the Encryption/Decryption of *** this way,the given small size of numbers can be stored as the prime key,which means the key is compact.A prime key clue in the sudoku puzzle always leads to only one solution,which means the key is always *** feature is the background for the paper,where the Sudoku puzzle output can be innovatively introduced in image *** solution is expanded to any size image using a sequence of expansion techniques that involve filling of the number matrix,Linear X-Y rotational shifting,and reverse shifting based on a standard zig-zag *** crypto key for an image dictates the details of positions,where the image pixels have to be *** is made at two levels,namely pixel and sub-pixel(RGB)levels for an image,with the latter having more effective *** brought-out technique falls under the Image scrambling method with partial *** metrics are impressive and are given by a Histogram deviation of 0.997,a Correlation coefficient of 10−2 and an NPCR of 99.98%.Hence,it is evident that the image cryptography with the sudoku kept in place is more efficient against Plaintext and Differential attacks.

关键词： Sudoku image cryptography pixels performance metrics

Peltier Coefficient and Photon-Assisted Tunnelling in Quantum Point Contact

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Chinese Physics Letters 2008年第12期25卷 4399-4401页

作者： Arafa H. Aly Department of Physics Zaragoza University Zaragoza 50009 Spain Department of Physics Inha University 402-751 South Korea Department of Physics Faculty of Sciences Beni-Suef University Egypt

We present the Peltier coefficient and thermal transport in quantum point contact （QPC）, under the influence of external fields and different temperatures. Also we obtain the oscillations of the Peltier coefficient in external fields. Numerical calculations of the Peltier coefficient are performed at different applied voltages, amplitudes and temperatures. The obtained results are consistent with the experimental data in the literature.

关键词： field emission molybdenum dioxide enhancement factor

Numerical Algorithm for Solving Multi-Pantograph Delay Equations on the Half-line Using Jacobi Rational Functions with Convergence Analysis

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Acta Mathematicae Applicatae Sinica 2017年第2期33卷 297-310页

作者： Eid H. DOHA Ali H. BHRAWY Ramy M. HAFEZ Department of Mathematics Faculty of Science Cairo University Giza Egypt Department of Mathematics Faculty of Science King Abdulaziz University Jeddah Saudi Arabia Department of Mathematics Faculty of Science Beni-Suef University Beni-Suef Egypt Department of Mathematics Alwagjh University College University of Tabuk Tabuk Saudi Arabia Department of Basic Science Institute of Information Technology Modern Academy Cairo Egypt

A new spectral Jacobi rational-Gauss collocation （JRC） method is proposed for solving the multi- pantograph delay differential equations on the half-line. The method is based on Jacobi rational functions and Gauss quadrature integration formula. The main idea for obtaining a semi-analytical solution for these equations is essentially developed by reducing the pantograph equations with their initial conditions to systems of algebraic equations in the unknown expansion coefficients. The convergence analysis of the method is analyzed. The method possesses the spectral accuracy. Numerical results indicating the high accuracy and effectiveness of this algorithm are presented. Indeed, the present method is compared favorably with other methods.

关键词： multi-pantograph equation delay equation collocation method Jacobi-Gauss quadrature Jacobirational functions convergence analysis

Hybrid Feature Selection Method for Predicting Alzheimer’s Disease Using Gene Expression Data

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Computers, Materials & Continua 2023年第3期74卷 5559-5572页

作者： Aliaa El-Gawady BenBella S.Tawfik Mohamed A.Makhlouf Department of Information Systems Faculty of Computers and InformaticsSuez Canal UniversityIsmailia41522Egypt Faculty of Computer Science Nahda UniversityBeni SuefEgypt

Gene expression(GE)classification is a research trend as it has been used to diagnose and prognosis many *** machine learning(ML)in the prediction of many diseases based on GE data has been a flourishing research ***,some diseases,like Alzheimer’s disease(AD),have not received considerable attention,probably owing to data scarcity *** this work,we shed light on the prediction of AD from GE data accurately using *** approach consists of four phases:preprocessing,gene selection(GS),classification,and performance *** the preprocessing phase,gene columns are preprocessed *** the GS phase,a hybrid filtering method and embedded method are *** the classification phase,three ML models are implemented using the bare minimum of the chosen genes obtained from the previous *** final phase is to validate the performance of these classifiers using different *** crux of this article is to select the most informative genes from the hybrid method,and the best ML technique to predict AD using this minimal set of *** different datasets are used to achieve our *** predict AD with impressive values forMultiLayer Perceptron(MLP)classifier which has the best performance metrics in four datasets,and the Support Vector Machine(SVM)achieves the highest performance values in only one *** assessed the classifiers using sevenmetrics;and received impressive results,allowing for a credible performance *** metrics values we obtain in our study lie in the range[.97,.99]for the accuracy(Acc),[.97,.99]for F1-score,[.94,.98]for kappa index,[.97,.99]for area under curve(AUC),[.95,1]for precision,[.98,.99]for sensitivity(recall),and[.98,1]for *** these results,the proposed approach outperforms recent interesting *** these results,the proposed approach outperforms recent interesting results.

关键词： Gene expression gene selection machine learning classification Alzheimer’s disease

Enhancing oxygenation of patients with coronavirus disease 2019: Effects on immunity and other health-related conditions

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World Journal of Clinical Cases 2021年第19期9卷 4939-4958页

作者： Ayman Mohamed Motaz Alawna Department of Physiotherapy and Rehabilitation Istanbul Gelisim UniversityIstanbul 34522Turkey Department of Basic Science and Biomechanics Faculty of Physical TherapyBeni Suef UniversityBeni Suef 62521Egypt Department of Physiotherapy and Rehabilitation Faculty of Allied Medical SciencesArab American UniversityJenin 24013Palestine

Coronavirus disease 2019(COVID-19)distresses the pulmonary system causing acute respiratory distress syndrome,which might lead to *** is no cure for COVID-19 ***-19 is a self-limited infection,and the methods that can enhance immunity are strongly *** oxygenation is one safe and effective intervention to enhance immunity and pulmonary *** review deliberates the probable influences of enhancing oxygenation on immunity and other health-connected conditions in patients with *** extensive search was conducted through Web of Science,Scopus,Medline databases,and EBSCO for the influence of enhancing oxygenation on immunity,pulmonary functions,psycho-immune hormones,and COVID-19 risk *** search included clinical trials and literature and systematic *** search revealed that enhancing oxygenation has a strong effect on improving immunity and pulmonary functions and psycho-immune ***,enhancing oxygenation has a self-protective role counter to COVID-19 risk ***,this search revealed the recommended safe and effective exercise protocol to enhance oxygenation in patients with *** oxygenation should be involved in managing patients with COVID-19 because of its significant effects on immunity,pulmonary functions,and COVID-19 risk factors.A mild to moderate cycling or walking with 60%-80%Vo2max for 20-60 min performed 2-3 times per week could be a safe and effective aerobic exercise program in patients with COVID-19 to enhance their immunity and pulmonary functions.

关键词： Oxygenation COVID-19 Immunity Pulmonary functions Psycho-immune hormones COVID-19 risk factors

Safety and effi cacy of hepatitis A vaccine in children with chronic liver diseas

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World Journal of Gastroenterology 2006年第45期12卷 7337-7340页

作者： Hanaa Mostafa El-Karaksy Manal Ismail El-Hawary Nehal Mohammad El-Koofy Rokaya El-Sayed Mona Al-Saeed El-Raziky Samah Asaad Mansour Gamal Mohammad Taha Fatma El-Mougy Department of Pediatrics Cairo University Egypt Department of Pediatrics Fayoum University Egypt Department of Pediatrics Beni-Swaif University Egypt Department of Chemical Pathology Cairo University Egypt

AIM： To study the safety and efficacy of hepatitis A vaccine （HAV） in children with chronic liver disease of various etiologies. METHODS： Eleven children with chronic liver disease and thirteen age- and sex-matched controls negative for HAV antibodies were vaccinated against hepatitis A after they gave their informed consent. Children with uncontrolled coagulopathy or signs of hepatic decompensation were excluded. The vaccine （Havrix： 720 ELISA units in 0.5 mL, from GlaxoSmithKline Biologicals） was given intramuscularly in the deltoid in 2 doses 6 mo apart. Children were tested for HAV antibodies one and six months after the ist dose and one month after the 2^nd dose. Total serum bilirubin, alanine aminotransferase （ALT）, and aspartate aminotransferase （AST） were determined immediately before and after one month of the 1st dose of the vaccine. RESULTS： Only 7 out of the 11 patients were positive for HAV antibodies after the 1^st dose of the vaccine, as compared to 100% of the controls. One month after the 2nd dose, all patients tested were positive for HAV antibodies. No deterioration in liver functions of patients was noted after vaccination. No adverse events, immediate or late, were reported by the mothers after each dose of the vaccine. CONCLUSION： Hepatitis A vaccine is both safe and effective in this small studied group of children with chronic liver disease. Given the high seroconversion rate, post-vaccination testing for HAV antibodies is not needed.

关键词： Children Chronic liver disease Hepatitis A Hepatitis A vaccine

Mode-Locked Erbium-Doped Fiber Laser Using Vanadium Oxide as Saturable Absorber

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Chinese Physics Letters 2018年第4期35卷 46-48页

作者： A.Nady M.F.Baharom A.A.Latiff S.W.Harun Physics Department Faculty of Science Beni Suef University Photonics Engineering Laboratory Department of Electrical Engineering University of Malaya Center for Telecommunication Research & Innovation Universiti Teknikal Malaysia Melaka

A mode-locked erbium doped fiber laser（EDFL） is demonstrated using the vanadium oxide（V2O5） material as a saturable absorber（SA）. The V2O5 based SA is hosted into poly ethylene oxide film and attached on fiber ferule in the laser cavity. It shows 7% modulation depth with 71 MW/cm2 saturation intensity. By incorporating the SA inside the EDFL cavity with managed intra-cavity dispersion, ultrashort soliton pulses are successfully generated with a full width at half maximum of 3.14 ps. The laser operated at central wavelength of 1559.25 nm and repetition frequency of 1 MHz.

关键词： EDF SA Mode-Locked Erbium-Doped Fiber Laser Using Vanadium Oxide as Saturable Absorber

Sex-specific effects of inbreeding and early ife conditions on the adult oxidative balance

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Current Zoology 2018年第5期64卷 631-639页

作者： Raissa Anna DE BOER David COSTANTINI Giulia CASASOLE Hamada ABDELGAWAD Han ASARD Marcel EENS Wendt MIJLLER Behavioural Ecology and Ecophysiology Group University of Antwerp Antwerp B2610 Belgium ComEU Sorbonnes Universites UMR 7221 CNRS/MNHN Museum National d'Histoire Naturelle France university of Antwerp and Integrated Molecular Plant physiology Research Antwerp B2020 Belgium Department of Botany and Microbiology University of Beni-Suef Beni-Suef Egypt

Inbreeding negatively affects various life-history traits, with inbred individuals typically having lower fit- ness than outbred individuals （=inbreeding depression）. Inbreeding depression is often emphasized under environmental stress, but the underlying mechanisms and potential long-lasting consequences of such inbreeding-environment interactions remain poorly understood. Here, we hypothesize that inbreeding-environment interactions that occur early in life have long-term physiological effects, in partic- ular on the adult oxidative balance. We applied a unique experimental design to manipulate early life conditions of inbred and outbred songbirds （Serinus canaria） that allowed us to separate prenatal and postnatal components of early life conditions and their respective importance in inbreeding-environment interactions. We measured a wide variety of markers of oxidative status in adulthood, resulting in a com- prehensive account for oxidative balance. Using a Bayesian approach with Markov chain Monte Carlo, we found clear sex-specific effects and we also found only in females small yet significant long-term effects of inbreeding-environment interactions on adult oxidative balance. Postnatal components of early life conditions were most persuasively reflected on adult oxidative balance, with inbred females that experienced disadvantageous postnatal conditions upregulating enzymatic antioxidants in adulthood. Our study provides some evidence that adult oxidative balance can reflect inbreeding-environment inter- actions early in life, but given the rather small effects that were limited to females, we conclude that oxida- tive stress miaht have a limited role as mechanism underlvina *** ***.q_

关键词： canary maternal effects gene-environment interactions hatching asynchrony.