Modeling and analysis of an <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si7.svg"><mml:mrow><mml:mi>S</mml:mi><mml:msub><mml:mi>I</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:msub><mml:mi>I</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>R</mml:mi></mml:mrow></mml:math> epidemic model with nonlinear incidence and general recovery functions of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si8.svg"><mml:msub><mml:mi>I</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math>

A.A Thirthar; Raid Kamil Naji; F Bozkurt; A. Yousef

doi:10.1016/j.chaos.2021.110746

Details

Publication Date

Thu Apr 01 2021

Journal Name

Chaos, Solitons & Fractals

Volume

145

DOI

10.1016/j.chaos.2021.110746

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Modeling and analysis of an <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si7.svg"><mml:mrow><mml:mi>S</mml:mi><mml:msub><mml:mi>I</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:msub><mml:mi>I</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>R</mml:mi></mml:mrow></mml:math> epidemic model with nonlinear incidence and general recovery functions of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si8.svg"><mml:msub><mml:mi>I</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math>

A.A Thirthar

Raid Kamil Naji

F Bozkurt

A. Yousef

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Publication Date

Fri Nov 01 2013

Journal Name

East Asian Journal On Applied Mathematics

Free Boundary Determination in Nonlinear Diffusion

M. S.

D.

M.

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Abstract<p>Free boundary problems with nonlinear diffusion occur in various applications, such as solidification over a mould with dissimilar nonlinear thermal properties and saturated or unsaturated absorption in the soil beneath a pond. In this article, we consider a novel inverse problem where a free boundary is determined from the mass/energy specification in a well-posed one-dimensional nonlinear diffusion problem, and a stability estimate is established. The problem is recast as a nonlinear least-squares minimisation problem, which is solved numerically using the <italic>lsqnonlin</italic> routine from the MATLAB toolbox. Accurate and stable numerical solutions are achieved. For noisy data, inst</p> ... Show More

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(8)

Publication Date

Fri Sep 30 2016

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Using Different Surfactants to Increase Oil Recovery of Rumaila Field (Experimental Work)

Talib A.

Safaa Hussain

Ahmed Noori Ghani

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Enhanced oil recovery is used in many mature oil reservoirs to increase the oil recovery factor. Surfactant flooding has recently gained interest again. To create micro emulsions at the interface between crude oil and water, surfactant flooding is the injection of surfactants (and co-surfactants) into the reservoir, thus achieving very low interfacial tension, which consequently assists mobilize the trapped oil.

In this study a flooding system, which has been manufactured and described at high pressure. The flooding processes included oil, water and surfactants. 15 core holders has been prepared at first stage of the experiment and filled with washed sand grains 80-500 mm and then packing the sand to obtain sand packs

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Publication Date

Thu Nov 01 2018

Journal Name

Iraqi National Journal Of Nursing Specialties

Effect of Nursing Educational Program on Recovery Following CABG Surgery: Intervention Study

Khalida

Ghalib

Najih

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This intervention study is composed on 55 patients at Saddam Center for Cardiac Surgery (Aben-Albetar) throughout the period from 1st of July 1997 to 15th of January 1999. The study aimed to evaluate the effectiveness of constructed nursing education program on reduction of complications and improving recovery among patients with Coronary Artery Bypass Graft (CABG) surgery through the application of repeated measures. The sample is divided into 27 patients who received the nursing educational program (study group) and 28 patients who continued to receive regular care (controls). Based on previous research meth

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Publication Date

Sun Sep 01 2019

Journal Name

Journal Of Physics: Conference Series

Recovery of temporal coefficient for heat equation from non-local overdetermination conditions

Mohammed

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Abstract<p>Recovery of time-dependent thermal conductivity has been numerically investigated. The problem of identification in one-dimensional heat equation from Cauchy boundary data and mass/energy specification has been considered. The inverse problem recasted as a nonlinear optimization problem. The regularized least-squares functional is minimised through lsqnonlin routine from MATLAB to retrieve the unknown coefficient. We investigate the stability and accuracy for numerical solution for two examples with various noise level and regularization parameter.</p>

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(2)

Publication Date

Sun Jan 01 2023

Journal Name

Revista Iberoamericana De Psicología Del Ejercicio Y El Deporte

EXPLORING THE MODELING OF SOCIO-TECHNICAL SYSTEMS IN THE FIELDS OF SPORT, ENGINEERING AND ECONOMICS

Hakeem Hammood Flayyih

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(26)

Publication Date

Tue Dec 31 2013

Journal Name

Al-khwarizmi Engineering Journal

Thermo-Rheological Investigation and Modeling of the Shear Viscosity of Polypropylene above the Melting Temperature

Polymer melt

Polypropylene

thermo-rheological modeling

generalized Newtonian fluid

Cross model

shear viscosity

shear thinning behavior

rotational rheometer

high-pressure capillary rheometer

Ammar

Shatha K.

Olaf

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The increasing use of polymeric materials in the daily life, leads to challenges in the processing industry to deliver high performance materials with affordable terms. However, new processing techniques lead to high costs. In order to reduce processing costs it is necessary to understand the non-Newtonian behavior of the polymers in their molten state to be able to simulate the processes before the construction of the plants starts. Here the shear thinning behavior of the viscosity of polymeric melts is essential. Thus, this paper deals with the experimental investigation of the thermo-rheological behavior of the viscosity of one of the most used polymers (Polypropylene) over a wide range of temperatures and shear rates. Furthermo

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Publication Date

Mon Aug 01 2016

Journal Name

Journal Of Engineering

Modeling and Simulation of Thermal Performance of Solar-Assisted Air Conditioning System under Iraq Climate

solar assisted air conditioning system

solar collector

thermal performance

simulation program

EES.

Najim Abid

Mohammed Abdulhassan

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In Iraq most of the small buildings deployed a conventional air conditioning technology which typically uses electrically driven compressor systems which exhibits several clear disadvantages such as high energy consumption, high electricity at peak loads. In this work a thermal performance of air conditioning system combined with a solar collector is investigated theoretically. The hybrid air conditioner consists of a semi hermetic compressor, water cooled shell and tube condenser, thermal expansion valve and coil with tank evaporator. The theoretical analysis included a simulation for the solar assisted air-conditioning system using EES software to analyze the effect of different parameters on the power consumption of c

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Publication Date

Mon Apr 01 2019

Journal Name

2019 4th Scientific International Conference Najaf (sicn)

Modeling and Experimental Research of Vibration N Properties of A Multi-Layer Printed Circuit Board

Al-Araji Z.H.

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(5)

Publication Date

Mon Nov 09 2015

Journal Name

Nternational Conference On Modern Trends In English Language And Literature/ Applied Linguistics Theme

Investigating EFL College Student's Errors in Recognizing and Producing Modal Auxiliary Verbs

Bushra

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DBN Dr. Liqaa Habeb, International Journal of Multidisciplinary Reseach, 2015

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Publication Date

Sat Dec 31 2022

Journal Name

International Journal Of Intelligent Engineering And Systems

Using Three-Dimensional Logistic Equations and Glowworm Swarm Optimization Algorithm to Generate S-Box

Sanaa Ali

Ammar Mohammd Ali

Safa S.

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(4)

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