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Modified Adomian decomposition method for solving the problem of boundary layer convective heat transfer

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Propulsion and Power Research 2018年第3期7卷 231-237页

作者： Yassir Daoud ahmed A.khidir Faculty of Mathematical Sciences and Statistics Alneelain UniversityAlgamhoria StreetP.O.Box 12702KhartoumSudan

In this paper,we apply a new modification of the Adomian decomposition method for solving the problem of boundary layer convective heat transfer with viscous dissipation and low pressure gradient over a at *** technique is based on the standard Adomian decomposition method and the Chebyshev pseudospectral *** are made between the pro-posed technique,the standard Adomian decomposition method,and the numerical solutions to demonstrate the applicability,validity,and high accuracy of the present *** results demonstrate that the new modification is more efficient and converges faster than the Adomian decomposition method.

关键词： Adomian decomposition method Chebyshev spectral method Boundary layer convective

The effects of cross-diffusion and radiation on mixed convection from a vertical flat plate embedded in a fluid-saturated porous medium in the presence of viscous dissipation

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Propulsion and Power Research 2016年第2期5卷 149-163页

作者： Mohammed A.Mohammed ahmed Mohammed E.Mohammed ahmed A.khidir Faculty of Technology of Mathematical Sciences and Statistics Alneelain UniversityP.O.Box 12702KhartoumSudan

In this paper,we propose a new application of a recent semi-numericalsuccessive linearization method(SLM)in solving highly coupled,nonlinear boundaryvalue *** method is presented in detail by solving the problem of steady flowof mixed convection and an incompressible viscous hydromagnetic fluid from a verticalflat plate embedded in a fluid-saturated porous *** governing partial differentialequations are transformed into a system of ordinary differential equations and then solvedby *** effects of different physical parameters on the velocity,temperature,andconcentration profiles are determined and *** skin-friction,and heat and masstransfer coefficients have been obtained and analyzed for various physical *** results are presented numerically through graphs and tables for both assistingand opposing flows to observe the effects of various parameters encountered in the equations.

关键词： Successive linearization method Mixed convection Cross-diffusion Heat and mass transfer Viscous dissipation

On linearization method to MHD boundary layer convective heat transfer with low pressure gradient

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Propulsion and Power Research 2015年第2期4卷 105-113页

作者： Mohammed A.Mohammed ahmed Mohammed E.Mohammed ahmed A.khidir Faculty of Technology of Mathematical Sciences and Statistics Alneelain UniversityKhartoumP.O.Box 12702Sudan

The paper highlights the application of a recent semi-numerical successive linearization method(SLM)in solving highly coupled,nonlinear boundary value *** method is presented in detail by solving the problem of boundary layer convective heat transfer with low pressure gradient in the presence of viscous dissipation and radiation *** effects of the parameters on the flow are *** velocity,temperature,skinfriction,and heat transfer coefficients have been obtained and discussed for various physical parametric values.

关键词： Successive linearization method Magnetohydrodynamics(MHD) Boundary layer convective heat transfer Pressure gradient Viscous dissipation

Boundedness Types of Perturbations on the Growth of Semigroups

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Advances in Pure Mathematics 2023年第1期13卷 1-10页

作者： Zuheir khidir ahmed Abdelgader Nariman Khider ahmed Abdalgadir Entisar Bakhit Bashir Elshikh Abualez Alamin ahmed Ali Department of Mathematics Faculty of Education Gezira University Wad Madani Sudan Department of Mathematics Faculty of Education Holy Quran University Wad Madani Sudan

We study types of boundedness of a semigroup on a Banach space in terms of the Cesáro-average and the behavior of the resolvent at the origin and also exhibit a characterization of type Hille-Yosida for the generators of ϕj-bounded strongly continuous semigroups. Furthermore, these results are used to investigate the effect of the Perturbation on the type of the growth of sequences.

关键词： Cesáro Average C0-Semigroups Boundedness Perturbation Stability Hille-Yosida Growth of Sequences

Boundedness Types of Perturbations on the Growth of Semigroups

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TCCA/NCS-Promoted Cascade Cyclization of <i>β</i>, <i>γ</i>-Unsaturated Compounds: Synthesis of Isoxazolines and Pyrazolines

Advances in Pure Mathematics（理论数学进展） 2023年第1期

作者： Zuheir khidir ahmed Abdelgader Nariman Khider ahmed Abdalgadir Entisar Bakhit Bashir Elshikh Abualez Alamin ahmed Ali

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International Journal of Organic Chemistry 2021年第4期11卷 187-198页

作者： khidir Tajelseir Othman Nibras ahmed Elaas Department of Chemistry Faculty of Education University of Gadarif Gadarif Sudan Department of Chemistry Faculty of Education University of Khartoum Khartoum Sudan

2-Isoxazolines and 2-pyrazolines have been derived from oxime and hydrazone derivatives reacted with N-chlorosuccinimide (NCS) and trichloroisocyanuric acid (TCCA). Cyclization strategy is developed for the reaction of β, γ-unsaturated hydrazones with the TCCA to drive 2-pyrazolines and the reaction of β, γ-unsaturated oximes with NCS to derive 2-isoxalzolines. Structures of all new 2-isoxazolines and 2-pyrazolines have been elucidated by microanalyses, 1H, 13C NMR and Mass spectroscopies.

关键词： 2-Isoxazolines 2-Pyrazolines NCS TCCA

Assessing Drug Use Indicators in Health Insurance Facilities, Gezira State, Sudan, 2017-2018

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Pharmacology & Pharmacy 2021年第10期12卷 237-246页

作者： Sara Abdelrahman ahmed Elnazeer Ibrahim Hamedelniel Abubakr khidir Yousif Medical Service Directorate National Health Insurance Fund Gezira Sudan Department of Pharmaceutics College of Pharmacy Omdurman Islamic University Omdurman Sudan MPH MHPE National Health Insurance Fund Gezira Sudan

Background: Inappropriate use of medicines is a global concern with serious consequences related to prescribing, dispensing, and use. WHO estimated that 50% of medicines are not used correctly on their journey from the facility to home. Objective: To assess medicines use using WHO drug core indicators regarding prescribing, patient, and facilities. Setting: Outpatients, Health centers in Wadmadani locality (Urban area) in Gezira State, Sudan. Method: A cross-sectional, prospective, analytical study was conducted in 30 health centers and 60 patients from each center were selected using a simple random sampling technique. WHO indicators form was used to collect data containing different variables. T-test at a level of confidence of 95% was used to test differences between indicators. Statistical Package for Social Science (SPSS) was used for data analysis. Results: The main prescribing indicators were 2.5 ± 0.6 for drugs per encounter, 44.1% ± 14.2%. Generic 54 ± 18.0 antibiotics, 12.0% ± 9.3% injectable, and 95.2% ± 11.5% of drugs were prescribed according to the NHIF-EML. The main patient’s indicators were, 2.9 ± 0.8 minutes for consultation time, 99.5 ± 36.8 seconds for dispensing time, and 72.5% ± 16.0% for medicines actually dispensed, 49.0% ± 18.0% for medicines adequately labeled, and 22.5% ± 7.3% of the patient

关键词： Assessing Drug Use Indicators National Health Insurance Fund Gezira Sudan

TCCA/NCS-Promoted Cascade Cyclization of β , γ -Unsaturated Compounds:Synthesis of Isoxazolines and Pyrazolines

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Assessing Drug Use Indicators in Health Insurance Facilities, Gezira State, Sudan, 2017-2018

International Journal of Organic Chemistry（有机化学国际期刊） 2021年第4期

作者： khidir Tajelseir Othman Nibras ahmed Elaas

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