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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

Variables Affecting the pH Measurement of Cement Mortars

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Journal of Wuhan University of Technology(Materials Science) 2021年第5期36卷 689-696页

作者： PAYAM Shafigh SUMRA Yousuf ZAINAH ibrahim Centre for Building Construction&Tropical Architecture(BuCTA)Faculty of Built EnvironmentUniversity of Malaya50603 Kuala LumpurMalaysia Department of Civil Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Department of Building and Architectural Engineering Faculty of Engineering&TechnologyBahauddin Zakariya University60000 MultanPakistan

A quantitative pH measuring method has been used to measure the pH of pure and blended cement *** blended cement mortars incorporating supplementary cementitious materials(SCMs)such as fly ash(FA),ground granulated ballast furnace slag(GGBFS)and palm oil fuel ash(POFA)were ***,different variables affecting the pH values of CBMs such as temperature of sample solution,quantity of sample powder,dilution ratio and temporary storage of sample during pH measuring process have been studied for all cement mortars.

关键词： mortar cementitious materials pH value dilution ratio temperature

Quantile Version of Mathai-Haubold Entropy of Order Statistics

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Computer Modeling in Engineering & Sciences 2021年第9期128卷 907-925页

作者： ibrahim M.Almanjahie Javid Gani Dar Amer ibrahim Al-Omari Aijaz Mir Department of Mathematics College of ScienceKing Khalid UniversityAbha62529Saudi Arabia Statistical Research and Studies Support Unit King Khalid UniversityAbha62529Saudi Arabia Department of Mathematical Sciences IUSTKashmir192231India Department of Mathematics Faculty of ScienceAl al-Bayt UniversityMafraq25113Jordan Department of Mathematics Govt.Degree College KilamHigher EducationJ&K192231India

Many researchers measure the uncertainty of a random variable using quantile-based entropy *** techniques are useful in engineering applications and have some exceptional characteristics than their distribution function *** order statistics,the key focus of this article is to propose new quantile-based Mathai-Haubold entropy and investigate its *** divergence measure of theMathai-Haubold is also considered and some of its properties are ***,based on order statistics,we propose the residual entropy of the quantile-based Mathai-Haubold and some of its property results are *** performance of the proposed quantile-based Mathai-Haubold entropy is investigated by simulation ***,a real data application is used to compare our proposed quantile-based entropy to the existing quantile *** results reveal the outperformance of our proposed entropy to the other entropies.

关键词： Shannon entropy Mathai-Haubold entropy quantile function residual entropy order statistics failure time reliability measures

Direct Power Control Based on Dead-beat Function and Extended Kalman Filter for PV Systems

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Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 863-872页

作者： Mostafa Ahmed ibrahim Harbi Ralph Kennel Mohamed Abdelrahem Chair of High-Power Converter Systems(HLU) Technical University of Munich(TUM)80333 MunichGermany Department of Electrical Engineering Faculty of EngineeringAssiut UniversityAssiut 71515Egypt Department of Electrical Engineering Faculty of EngineeringMenoufia UniversityShebin El-Koum 32511Egypt IEEE

In this paper,a new proposal for the implementation of the well-known direct power control(DPC)technique in grid-connected photovoltaic(PV)systems is ***,the DPC is executed using a look-up table procedure based on the error between the actual and reference values of the active and reactive ***,the structure of the DPC is simple and results in a fast transient behavior of the inner current loop(injected currents).Therefore,in the current study,the DPC is reformulated using a dead-beat *** this formulation,the reference voltage vector(RVV)is obtained in theα-βreference ***,the switching states for the inverter can be obtained based on the sign of the components of the *** suggested DPC is compared with the conventional one and other switching tables,which are intended for performance ***,an extended Kalman filter(EKF)is utilized to eliminate all grid-voltage ***,the switching frequency of the proposed technique is minimized without any need for weighting factors or cost function *** overall control technique is validated using a hardware-in-the-loop(HIL)experimental set-up and compared with other schemes under different operating conditions.

关键词： Photovoltaic(PV)system direct power control(DPC) sensorless control switching frequency minimization weighting factor

Response of thermal source in a transversely isotropic thermoelastic half-space with mass diffusion by using a finite element method

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Chinese Physics B 2012年第8期21卷 307-313页

作者： ibrahim A.Abbas Rajneesh Kumar Vijay Chawla Department of Mathematics Faculty of Science and Arts-KhulaisKing Abdulaziz UniversityJeddahSaudi Arabia Department of Mathematics Faculty of ScienceSohag UniversitySohagEgypt Department of Mathematics Kurukshetra UniversityKurukshetra-136119HaryanaIndia

The two-dimensional problem of generalized thermoelastic diffusion material with thermal and diffusion relaxation times is investigated in the context of the Lord-Shulman theory. As an application of the problem, a particular type of thermal source is considered and the problem is solved numerically by using a finite element method. The components of displacement, stress, temperature distribution chemical potential and mass concentration are obtained. The resulting quantities are depicted graphically for a special model. An appreciable effect of relaxation times is observed on various resulting quantities.

关键词： thermoelastic diffusion thermal source finite element method relaxation time

Portal gas in neonates;is it always surgical? A case report

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World Journal of Clinical Cases 2020年第17期8卷 3804-3807页

作者： Tariq ibrahim Altokhais Division of Pediatric Surgery Department of SurgeryCollege of MedicineKing Saud UniversityRiyadh 4545Saudi Arabia

BACKGROUND Hepatic portal venous gas in infants is frequently due to late presentation of necrotizing enterocolitis which is considered a relative indicator for surgical *** SUMMARY A preterm baby underwent an umbilical catheter placement and discovered in abdominal radiograph to have air in the portal venous system due to malpositioning of the umbilical *** Hepatic portal venous gas in infants without signs of necrotizing enterocolitis could result from malposition of umbilical venous catheter, and in that case, should be managed medically, with no need for surgical intervention.

关键词： Portal gas Neonate Necrotizing Enterocolitis Umbilical Case report Catheter

Enteric neuropathy in diabetes:Implications for gastrointestinal function

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World Journal of Gastroenterology 2024年第22期30卷 2852-2865页

作者： Mona Mohamed ibrahim Abdalla Department of Human Biology School of MedicineInternational Medical UniversityBukit Jalil 57000Kuala LumpurMalaysia

Diabetes,commonly known for its metabolic effects,also critically affects the enteric nervous system(ENS),which is essential in regulating gastrointestinal(GI)motility,secretion,and *** development of diabetes-induced enteric neuropathy can lead to various GI dysfunctions,such as gastroparesis and irregular bowel habits,primarily due to disruptions in the function of neuronal and glial cells within the ENS,as well as oxidative stress and *** editorial explores the pathophysiological mechanisms underlying the development of enteric neuropathy in diabetic ***,it discusses the latest advances in diagnostic approaches,emphasizing the need for early detection and intervention to mitigate GI complications in diabetic *** editorial also reviews current and emerging therapeutic strategies,focusing on pharmacological treatments,dietary management,and potential neuromodulatory ***,this editorial highlights the necessity of a multidisciplinary approach in managing enteric neuropathy in diabetes,aiming to enhance patient quality of life and address a frequently overlooked complication of this widespread disease.

关键词： Diabetic neuropathy Gastrointestinal Insulin resistance Diabetes Enteric nervous system Enteric neuropathy

Integrated Evolving Spiking Neural Network and Feature Extraction Methods for Scoliosis Classification

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Computers, Materials & Continua 2022年第12期73卷 5559-5573页

作者： Nurbaity Sabri Haza Nuzly Abdull Hamed Zaidah ibrahim Kamalnizat ibrahim Mohd Adham Isa Faculty of Engineering Universiti Teknologi MalaysiaSchool of ComputingSkudai81310JohorMalaysia Faculty of Computer and Mathematical Sciences Universiti Teknologi MARA Cawangan Melaka Kampus JasinMerlimau77300MelakaMalaysia Faculty of Computer and Mathematical Sciences University Teknologi MARAShah Alam40450SelangorMalaysia Fakulti Perubatan&Kesihatan Pertahanan Universiti Pertahanan Nasional Malaysia(UPNM)Sungai Besi57000Kuala LumpurMalaysia

Adolescent Idiopathic Scoliosis(AIS)is a deformity of the spine that affects *** current method for detecting AIS is based on radiographic images which may increase the risk of cancer growth due to *** is another alternative used to identify AIS by distinguishing the curves of the spine from the surface of a human’s ***,detecting the curve of the spine is manually performed,making it a time-consuming *** overcome this issue,it is crucial to develop a better model that automatically detects the curve of the spine and classify the types of *** research proposes a new integration of ESNN and Feature Extraction(FE)methods and explores the architecture of ESNN for the AIS classification *** research identifies the optimal Feature Extraction(FE)methods to reduce computational *** ability of ESNN to provide a fast result with a simplicity and performance capability makes this model suitable to be implemented in a clinical setting where a quick result is crucial.A comparison between the conventional classifier(Support Vector Machine(SVM),Multi-layer Perceptron(MLP)and Random Forest(RF))with the proposed AIS model also be performed on a dataset collected by an orthopedic expert from Hospital Universiti Kebangsaan Malaysia(HUKM).This dataset consists of various photogrammetry images of the human back with different types ofMalaysian AIS patients to solve the scoliosis *** process begins by pre-processing the images which includes resizing and converting the captured pictures to gray-scale *** is then followed by feature extraction,normalization,and *** experimental results indicate that the integration of LBP and ESNN achieves higher accuracy compared to the performance of multiple baseline state-of-the-art Machine Learning for AIS *** demonstrates the capability of ESNN in classifying the types of AIS based on photogrammetry images.

关键词： Adolescent idiopathic scoliosis evolving spiking neural network lenke type local binary pattern photogrammetry

Wear Behavior of Aluminum Matrix Hybrid Composites Fabricated through Friction Stir Welding Process

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Journal of Iron and Steel Research International 2016年第10期23卷 1119-1126页

作者： Halil ibrahim KURT Murat ODUNCUOGLU Ramazan ASMATULU Department of Mechanical and Metal Technologies Technical SciencesGaziantep University Department of Mechanical Engineering Wichita State University

Effects of friction stir processing（FSP）parameters and reinforcements on the wear behavior of 6061-T6 based hybrid composites were investigated.A mathematical formulation was derived to calculate the wear volume loss of the *** experimental results were contrasted with the results of the proposed *** influences of sliding distance,tool traverse and rotational speeds,as well as graphite（Gr）and titanium carbide（TiC）volume fractions on the wear volume loss of the composites were also investigated using the prepared *** results demonstrated that the wear volume loss of the composites significantly increased with increasing sliding distance,tool traverse speed,and rotational speed;while the wear volume loss decreased with increasing volume fraction of the reinforcements.A minimum wear volume loss for the hybrid composites with complex reinforcements was specified at the inclusion ratio of 50% TiC＋50% Al2O3 because of improved lubricant ability,as well as resistance to brittleness and *** possibilities to develop wear-resistant aluminum-based composites for different industrial applications were proposed.

关键词： aluminum alloy friction stir processing wear hybrid composite modeling