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more than a simple egg:Underlying mechanisms of cold tolerance in avian embryos

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Avian Research 2023年第2期14卷 267-280页

作者： ibrahim m.Ahmad Dongming Li Hebei Key Laboratory of Animal Physiology Biochemistry and Molecular BiologyCollege of Life SciencesHebei Normal UniversityShijiazhuang050024China Hebei Collaborative Innovation Center for Eco-Environment Hebei Normal UniversityShijiazhuang050024China

Avian embryos,which develop within eggs,exhibit remarkable tolerance to extremely low *** being a common trait among all birds,the mechanisms underlying this cold tolerance in avian embryos remain largely *** gain a better understanding of this phenomenon and the coping mechanisms involved,we reviewed the literature on severe cold tolerance in embryos of both wild and domestic *** found that embryos of different bird orders exhibit tolerance to severe cold during their *** response to cold stress,embryos slow down their heartbeat rates and *** severe cold temperatures,embryos can suspend these processes,entering a torpid-like state of cardiac *** compensate for these developmental delays,embryos extend their regular incubation *** on their embryonic age,embryos of all bird species can tolerate acute severe cold regimes;only a few tolerate chronic severe cold *** also discussed various extrinsic and intrinsic factors that affect the tolerance of bird embryos to low temperatures before and after *** tolerance appears to be a heritable trait shared by wild and domestic embryos of all bird classes,regardless of egg size or development(altricial/precocial).Driven by environmental variability,cold tolerance in avian embryos is an optimal physiological and ecological strategy to mitigate the adverse effects of cold conditions on their development in response to fluctuating environmental temperatures.

关键词： Acute cold tolerance Avian embryo Chronic cold tolerance Embryonic development Hatching success Incubation period

COVID19 Outbreak:A Hierarchical Framework for User Sentiment Analysis

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Computers, materials & Continua 2022年第2期70卷 2507-2524页

作者： Ahmed F.ibrahim m.Hassaballah Abdelmgeid A.Ali Yunyoung Nam ibrahim A.ibrahim Department of Computer Science Faculty of Computer ScienceNahda UniversityBanisuefEgypt Department of Computer Science Faculty of Computers and InformationSouth Valley UniversityQenaEgypt Faculty of Computers and Information Minia UniversityAlMiniaEgypt Department of Computer Science and Engineering Soonchunhyang UniversityAsanKorea

Social networking sites in the most modernized world are flooded with large data *** the sentiment polarity of important aspects is necessary;as it helps to determine people’s opinions through what they *** Coronavirus pandemic has invaded the world and been given a mention in the social media on a large *** a very short period of time,tweets indicate unpredicted increase of *** reflect people’s opinions and thoughts with regard to coronavirus and its impact on *** research community has been interested in discovering the hidden relationships from short texts such as Twitter and Weiboa;due to their shortness and *** this paper,a hierarchical twitter sentiment model(HTSm)is proposed to show people’s opinions in short *** proposed HTSm has two main features as follows:constructing a hierarchical tree of important aspects from short texts without a predefined hierarchy depth and width,as well as analyzing the extracted opinions to discover the sentiment polarity on those important aspects by applying a valence aware dictionary for sentiment reasoner(VADER)sentiment *** tweets for each extracted important aspect can be categorized as follows:strongly positive,positive,neutral,strongly negative,or *** quality of the proposed model is validated by applying it to a popular product and a widespread *** results show that the proposed model outperforms the state-of-the-art methods used in analyzing people’s opinions in short text effectively.

关键词： COVID19 COVID data sentiment analysis hierarchical clustering sentiment tree

Ballistic resistance and energy dissipation of woven-fabric composite targets:Insights on the effects of projectile shape and obliquity angle

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Defence Technology（防务技术） 2023年第3期21卷 14-32页

作者： ibrahim Goda UniversitéBourgogne Franche-Comté FEMTO-ST InstituteDépartement Mécanique Appliquée24 Rue de L’Épitaphe25000BesançonFrance

This study aims at investigating the ballistic resistance and energy absorption in woven E-glass composite panels,considering different projectile nose shapes and oblique incidence *** that scope,three-dimensional finite element(FE)models of both projectiles and the laminated target are developed and numerical investigations are carried out using Abaqus Explicit *** composite damage model’s constitutive law encompasses nonlinear material response,material properties degradation,progressive failure,and an element deletion *** cohesive surface technique is used to represent the interface between two adjacent plies in the laminate,and the traction-separation law is used to characterize the behaviors of interlaminar degradation and *** responses attributable to fiber rupture,matrix cracking,and plasticity caused by micro-matrix cracking due to shear loading are taken into account with suitable damage evolution *** computational framework is first validated against the experimental results reported in the literature by performing ballistic impact tests on the target laminate with conical,hemispherical and blunt-ended projectile,and the numerical results showed a good comparison in terms of residual *** the framework is explored in simulating more complex failure mechanisms,with particular emphasis on the influence of the impact angle of obliquity,a parameter that is not usually analyzed in the *** that regard,the effects of normal and oblique impact on the damage morphologies and ballistic behavior of the fabric composite target in terms of energy absorption,impact contact force,and projectile residual velocity are conducted and analyzed,*** findings showed that the ballistic impact behavior of target composite is substantially influenced by projectile nose shape and incidence angle obliquity.

关键词： resistance cracking composite

Improving Date Fruit Classification Using Cycle GAN-Generated Dataset

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Computer modeling in Engineering & Sciences 2022年第4期131卷 331-348页

作者： Dina m.ibrahim Nada m.Elshennawy Department of Information Technology College of ComputerQassim UniversityBuraydah51452Saudi Arabia Computers and Control Engineering Department Faculty of EngineeringTanta UniversityTanta37133Egypt

Dates are an important part of human *** are high in essential nutrients and provide a number of health *** fruits are also known to protect against a number of diseases,including cancer and heart *** fruits have several sizes,colors,tastes,and *** are a lot of challenges facing the date *** of the most significant challenges is the classification and sorting of *** there is no public dataset for date fruits,which is a major limitation in order to improve the performance of convolutional neural networks(CNN)models and avoid the overfitting *** this paper,an augmented date fruits dataset was developed using Deep Convolutional Generative Adversarial Networks(DCGAN)and CycleGAN approach to augment our collected date fruit *** augmentation is required to address the issue of a restricted number of images in our datasets,as well as to establish a balanced *** are three types of dates in our proposed dataset:Sukkari,Ajwa,and *** dataset augmentation,we train our created dataset using ResNet152V2 and CNN models to assess the classification process for our three categories in the *** train these two models,we start with the original ***,the models were trained using the DCGAN-generated dataset,followed by the CycleGAN-generated *** resulting results demonstrated that when using the ResNet152V2model,the CycleGAN-generated dataset had the highest classification performance with 96.8%accuracy,followed by the CNN model with 94.3%accuracy.

关键词： Dates fruits data augmentation DCGAN CycleGAN,deep learning convolution neural networks

Role of microRNAs in the predisposition to gastrointestinal malignancies

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World Journal of Clinical Cases 2020年第9期8卷 1580-1585页

作者： maria Baz tony ibrahim Department of Tumor molecular Biology Gustave Roussy Cancer CampusVillfejuif 94805France Department of medical Oncology Gustave Roussy Cancer CampusVillfejuif 94805France

microRNAs(miRNAs)are highly deregulated in cancer and play a role in the initiation of ***,miRNAs have attracted attention in gastrointestinal(GI)*** nucleotide polymorphisms(SNPs)could affect the genes involved in each step of miRNA *** metaanalyses of case-control studies have assessed the association between miRNA“pathway”gene-SNPs(including biosynthesis regulators and binding sites)and susceptibility to GI *** present in this mini-review the current knowledge on the association between miRNAs“pathway”genes and GI cancer *** interaction between miRNA/regulators/binding site-SNPs and environmental as well as genomic factors is an interesting field that should be exploited in future studies.

关键词： Cancer Digestive tract microRNA Review Risk Single nucleotide polymorphism

Conditional Probability Approach for Fault Detection in Photovoltaic Energy Farms

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Computer Systems Science & Engineering 2022年第9期42卷 1109-1120页

作者： Nagy I.Elkalashy ibrahim B.m.Taha Electrical Engineering Department Faculty of EngineeringMenoufia University32511Egypt Electrical Engineering Department College of EngineeringTaif University21944Saudi Arabia

Detection of electric faults in photovoltaic (PV) farms enhances a sustainable service continuity of farm energy generation. In this paper, a probabilisticfunction is introduced to detect the faults in the PV farms. The conditional probability functions are adopted to detect different fault conditions such as internalstring faults, string-to-string faults, and string-to-negative terminal faults. As thediodes are important to make the PV farms in-service safely during the faults,the distribution currents of these faults are evaluated with different concepts ofdiode consideration as well as without considering any diode installation. Thispart of the study enhances the diode utilization in the PV farms concerning theprotection point of view. The PV string currents are used as inputs to the conditional probability detection algorithms. However, the setting of the fault detectiontechnique is not portable for the other PV systems due to broad ranges of PV system ratings. To accordingly generalize the proposed fault detection algorithm, thePV string currents are first normalized to the total array current for universallyapplying the detection function at different PV string ratings. The limiting faultresistances are evaluated to show the sensitivity of the proposed fault *** results ensure the application of the proposed probabilistic detection functionfor PV farms.

关键词： Photovoltaic farm fault detection conditional probability diodes

mHD stagnation point flow of nanofluid with SWCNT and mWCNT over a stretching surface driven by Arrhenius kinetics

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Applied mathematics(A Journal of Chinese Universities) 2022年第3期37卷 366-382页

作者： Sohail Nadeem Shafiq Ahmad Alibek Issakhov ibrahim m.Alarifi Department of mathematics Quaid-I-Azam UniversityIslamabad 44000Pakistan Al-Farabi Kazakh National University av.al-Farabi 71050040AlmatyKazakhstan Department of mechanical and Industrial Engineering College of engineering Majmaah UniversityAl-Majmaah 11952RiyadhSaudi Arabia

The intention of the current research is to address the conclusion of non-isothermal heterogeneous reaction on the stagnation-point flow of SWCNT-engine oil and mWCNT-engine oil nanofluid over a shrinking/stretching ***,exemplify the aspect of heat and mass transfer the upshot of magnetohydrodynamics(mHD),thermal radiation,and heat generation/absorption coefficient are *** bvp4 c from matlab is pledged to acquire the numerical explanation of the problem that contains nonlinear system of ordinary differential equations(ODE).The impacts of miscellaneous important parameters on axial velocity,temperature field,concentration profile,skin friction coefficient,and local Nusselt number,are deliberated through graphical and numerically erected tabulated *** solid volume fraction diminishes the velocity distribution while enhancing the temperature ***,the rate of shear stress declines with increasing the magnetic and stretching parameter for both SWCNT and mWCNT.

关键词： heat generation surface reaction CNTs based nanofluid stretching/shrinking sheet thermal radiation

Numerical damage evaluation of perforated steel columns subjected to blast loading

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Defence Technology（防务技术） 2022年第5期18卷 735-746页

作者： mahmoud T.Nawar ibrahim T.Arafa Osama m.Elhosseiny Structural Engineering Department Zagazig UniversityZagazig44519Egypt

The structural performance of perforated steel columns(PSCs)is significantly more complex than the one of solid web I-shaped elements under the diversity of blast loading *** damage criterion of PSCs is not only related to initial deformation response during the blast but also the residual axial load capacity and it can be considered as a reliable index after the blast ***,the PSCs damages will be studied in two stages;direct and post blast *** the present study,the dynamic response of PSCs was numerically evaluated under different levels of blast threats using LS-DYNA *** explicit finite element(FE)analyses are carried out to investigate the effect of various parameters,such as web opening shapes,boundary conditions and strengthening details on the damage index and toughness of the PSCs compared to the parent steel *** results of the comparative study show that the damage and toughness decrease when the support condition changes from pinned to fixed ends through the two stages of *** give high toughness compared to its parent sections during blast shock stage while,a remarkable decrease in toughness is observed during the application of axial gravity after blast ***,the web opening shapes have slight effects on the global dynamic behavior of PSCs,particularly in terms of residual *** the contrary,the retrofitting strategy using both closed holes at end and vertical stiffeners have an effective enhancement to get higher toughness in case of the extreme blasts.

关键词： Perforated steel columns Blast load Damage criterion Numerical modeling Explicit finite element analysis Web-opening shapes

Collaborative Efforts and Strategies for Cholera Outbreak Control in Garissa County, Kenya: Implementation of Water Quality monitoring Interventions

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Journal of Water Resource and Protection 2024年第2期16卷 123-139页

作者： michael Habtu mark Nanyingi Ali A. Hassan Abdiwahid m. Noor Joel mutyandia muli Alan mwika Julius Wekesa Ahmed Fidhow Diba Dulacha Landry Kabego Ishata Nannie Conteh Andre Arsene Bita Fouda Sonia Chene Aden H. ibrahim Ahmed Nadhir Omar martins C. Livinus Abdourahmane Diallo World Health Organization Nairobi Kenya Department of Health Garissa County Government Garissa Kenya Water Resources Authority Garissa Kenya World Health Organization Regional Office for Africa Brazzaville Congo Regional Agency for Health Dijon France

A multi-faceted Case Area Targeted Intervention (CATI) approach emphasizing the integration of Water, Sanitation and Hygiene (WASH) interventions and Oral Cholera Vaccine (OCV) campaign was employed to respond to the outbreak of cholera in Garissa County. Drinking water sources in areas heavily impacted by cholera were systematically mapped and tested for microbiological quality. The quality assessment was carried out in April 2023 during an ongoing cholera outbreak in the county. A total of 109 samples were collected and tested for thermotolerant coliforms and other in situ parameters. The finding revealed that more than 87% of the samples did not meet the World Health Organization (WHO) standard for thermotolerant coliforms;and 30% had turbidity values above the recommended threshold values. None of the 109 samples had any traceable residual chlorine. Following these findings, the county government implemented the targeted interventions which resulted in a positive impact in the fight against cholera. The WHO supported key interventions which included capacity building in water quality monitoring and prepositioning of critical WASH commodities to the cholera affected areas.

关键词： Cholera Drinking Water Household Water Treatment Kenya