Stability and Hopf bifurcation of an epidemiological model with effect of delay the awareness programs and vaccination: analysis and simulation

R. M. Yaseen; A. A. Mohsen; H. F. Al-Husseiny; K. Hattaf

doi:10.28919/cmbn/7910

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Publication Date

Sun Jan 01 2023

Journal Name

Communications In Mathematical Biology And Neuroscience

DOI

10.28919/cmbn/7910

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Stability and Hopf bifurcation of an epidemiological model with effect of delay the awareness programs and vaccination: analysis and simulation

hopf bifurcation

infectious disease

media programs

sensitive analysis

time delay

vaccination effect

R. M. Yaseen

A. A. Mohsen

H. F. Al-Husseiny

K. Hattaf

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Publication Date

Tue Feb 28 2023

Journal Name

Applied System Innovation

Earthquake Hazard Mitigation for Uncertain Building Systems Based on Adaptive Synergetic Control

synergetic control

adaptive synergetic control

structural building

earthquake

vibration suppression

stability analysis

Ayad Q.

Amjad J.

Ziyad T.

Musaab E.

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This study presents an adaptive control scheme based on synergetic control theory for suppressing the vibration of building structures due to earthquake. The control key for the proposed controller is based on a magneto-rheological (MR) damper, which supports the building. According to Lyapunov-based stability analysis, an adaptive synergetic control (ASC) strategy was established under variation of the stiffness and viscosity coefficients in the vibrated building. The control and adaptive laws of the ASC were developed to ensure the stability of the controlled structure. The proposed controller addresses the suppression problem of a single-degree-of-freedom (SDOF) building model, and an earthquake control scenario was conducted and simulat

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Publication Date

Fri Oct 31 2025

Journal Name

Mathematical Modelling Of Engineering Problems

Modified Optimization Algorithms for Infinite Integro-Differential Equations via Generalized Laguerre Polynomials

convergence analysis

generalized Laguerre polynomial

infinite-boundary problems

integro-differential equation

optimization techniques

Farah J.

Nadia M. J.

Suha

Nadia M. G.

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This study emphasizes the infinite-boundary integro-differential equation. To examine the approximate solution of the problem, two modified optimization algorithms are proposed based on generalized Laguerre functions. In the first technique, the proposed method is applied to the original problem by approximating the solution using the truncated generalized Laguerre polynomial of the unknown function, optimizing coefficients through error minimization, and transforming the integro-differential equation into an algebraic equation. In contrast, the second approach incorporates a penalty term into the objective function to effectively enforce boundary and integral constraints. This technique reduces the original problem to a mathematical optimi

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Publication Date

Sat Dec 02 2017

Journal Name

Al-khwarizmi Engineering Journal

Direction Finding Using GHA Neural Networks

Keywords: Direction of arrival (DOA)

Generalized Hebbian Algorithm (GHA)

Principal component analysis (PCA)

Capon.

N. H.

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This paper adapted the neural network for the estimating of the direction of arrival (DOA). It uses an unsupervised adaptive neural network with GHA algorithm to extract the principal components that in turn, are used by Capon method to estimate the DOA, where by the PCA neural network we take signal subspace only and use it in Capon (i.e. we will ignore the noise subspace, and take the signal subspace only).

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Publication Date

Tue May 01 2018

Journal Name

Journal Of Engineering Science And Technology

A proposed dual size design for energy minimization in sub-threshold circuits

Dual size design

Slack based GA

Static timing analysis

Sub-threshold CMOS circuits

Ultra low energy

Ali T.

SALEEM M.

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Sub-threshold operation has received a lot of attention in limited performance applications.However, energy optimization of sub-threshold circuits should be performed with the concern of the performance limitation of such circuit. In this paper, a dual size design is proposed for energy minimization of sub-threshold CMOS circuits. The optimal downsizing factor is determined and assigned for some gates on the off-critical paths to minimize the energy at the maximum allowable performance. This assignment is performed using the proposed slack based genetic algorithm which is a heuristic-mixed evolutionary algorithm. Some gates are heuristically assigned to the original and the downsized design based on their slack time determined by static tim

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Publication Date

Wed Dec 15 2021

Journal Name

Arab World English Journal

Reading Difficulties in English as a Second Language in Grade Five at a Saint Patrick’s High School for Boys, Hyderabad- India

Reading difficulties

young learners

poor accuracy

Neale Analysis of Reading Ability test

English as a Second Language

Zena A.

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Reading is one of the essential components of the English language. Countries that use English as a second language (ESL) sometimes have difficulties in reading and comprehension. According to many researches, mother tongue has proved some interferences with learning a second language. This study investigated the results of reading difficulties of young second language learners in terms of accuracy, comprehension, and rate using the Neale Analysis of Reading Ability test. The study was carried out in one of the High Schools for Boys in Hyderabad, India and included Grade five, aged 10-12 years. In order to understand the reading difficulties of English as a second language, a qualitative approach was employed. Interview, reading tes

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(2)

Publication Date

Sun Oct 01 2023

Journal Name

Baghdad Science Journal

Solid Waste Treatment Using Multi-Criteria Decision Support Methods Case Study Lattakia City

Environmental Awareness

Hierarchical Analysis Process AHP

Multi-Criteria Decision-Making MCDM

Municipal Solid Waste MSW

Solid Waste Management

Raed

Zahraa

Haytham

Adel

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Lattakia city faces many problems related to the mismanagement of solid waste, as the disposal process is limited to the random Al-Bassa landfill without treatment. Therefore, solid waste management poses a special challenge to decision-makers by choosing the appropriate tool that supports strategic decisions in choosing municipal solid waste treatment methods and evaluating their management systems. As the human is primarily responsible for the formation of waste, this study aims to measure the degree of environmental awareness in the Lattakia Governorate from the point of view of the research sample members and to discuss the effect of the studied variables (place of residence, educational level, gender, age, and professional status) o

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(1)

Publication Date

Tue May 16 2023

Journal Name

Journal Of Engineering

Load Distribution Factors For Horizontally Curved Composite Concrete-Steel Girder Bridges

Composite Bridges

AASHTO Loading

Load Distribution Factors

Horizontally Curved Bridges

Finite Element Analysis

Curved I-Girders

Warping Stresses

Rafa'a Mahmood

Zainab Saadi

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This paper focuses on Load distribution factors for horizontally curved composite concrete-steel girder bridges. The finite-element analysis software“SAP2000” is used to examine the key parameters that can influence the distribution factors for horizontally curved composite steel
girders. A parametric study is conducted to study the load distribution characteristics of such bridge system due to dead loading and AASHTO truck loading using finite elements method. The key parameters considered in this study are: span-to-radius of curvature ratio, span length, number of girders, girders spacing, number of lanes, and truck loading conditions. The results have shown that the curvature is the most critical factor which plays an important

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Publication Date

Sat Oct 01 2016

Journal Name

Journal Of Theoretical And Applied Information Technology

Factors affecting global virtual teams’ performance in software projects

Today the trend is to perform software development work via distributed geographical area among team

individual or even as an organization. However

due to the global market and international presence of many companies

there is a need to implement a global virtual teams. The global virtual team members are gradually engaged in globalized business environments across space

time and organizational boundaries via information and communication technologies. A global virtual team relies on communication

collaboration

and information exchange are the most important criteria in global virtual teams’ operations. The purpose of this paper is to answer two research questions. The first research question is to identify the factors affecting global virtual teams’ performance. A systematic literature review was conducted to answer the first research question. The second research question is on what the rank of the factor affecting the global virtual teams’ performance according to their level of effect on global virtual teams’ performance. Online survey was conducted within 103 developers and IT managers from eight IT companies to answer the second research question. The Statistical Package for Social Science (SPSS 22) was used to analyze the collected data. In this study

we investigated factors that affect global virtual teams’ performance

factors considered include cultural differences

language problems

time-zone differences

team size

technical problems

lack of trust

lack of sufficient training

and ICT problems. Also the findings indicated that lack of sufficient training is the highest level of effect on global virtual teams’ performance. On the other hand

Ali Yahya Gheni

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