Modified Mathematical Model of Tumor Treatment by Radiotherapy

Fatima Ahmed Shihab

doi:10.21123/bsj.2020.17.3.0841

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Publication Date

Tue Sep 01 2020

Journal Name

Baghdad Science Journal

Volume

17

Issue Number

3

DOI

10.21123/bsj.2020.17.3.0841

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Modified Mathematical Model of Tumor Treatment by Radiotherapy

Cancer

Laplace Adomian Decomposition method

Radiotherapy

Saad Naji

Fatima Ahmed Shihab

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In this research, a mathematical model of tumor treatment by radiotherapy is studied and a new modification for the model is proposed as well as introducing the check for the suggested modification. Also the stability of the modified model is analyzed in the last section.

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Publication Date

Sun Oct 19 2025

Journal Name

Lecture Notes In Networks And Systems

Using Artificial Intelligence in Analyzing Historical Documents: The Egyptian Libyan Border as a Model (1911–1951)

Rihab Hassan

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Publication Date

Wed Sep 15 2021

Journal Name

Al-academy

Exposure and its working mechanisms in theatrical multi-scene model "critical dramaturgy study": يوسف رشيد جبر

Exhibiting

theater

scenes

dramaturgy

Yousuf

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The concept of intertextuality was one of the problems that occupied the attention of critics and critics in targeting the structure of textual intertextuality between texts and their overlap in the process of producing meaning. Until intertextuality became a stable term and it can be monitored in the structure of the theatrical text and determining the mechanisms of this intertextuality between texts through fields and classifications agreed upon by the most important critics who wrote and considered intertextuality. Perhaps our previous research (the approach of exposure in the epistemological hallway to intertextuality) was an attempt to interview a terminology, which the researcher intended to monitor, through the mechanisms of inter

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Publication Date

Mon Feb 01 2021

Journal Name

Journal Of Physics: Conference Series

The Fear Effect on a Food Chain Prey-Predator Model Incorporating a Prey Refuge and Harvesting

Zina Kh.

Azhar A.

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Abstract<p>In this paper, we investigate the impact of fear on a food chain mathematical model with prey refuge and harvesting. The prey species reproduces by to the law of logistic growth. The model is adapted from version of the Holling type-II prey-first predator and Lotka-Volterra for first predator-second predator model. The conditions, have been examined that assurance the existence of equilibrium points. Uniqueness and boundedness of the solution of the system have been achieve. The local and global dynamical behaviors are discussed and analyzed. In the end, numerical simulations are confirmed the theoretical results that obtained and to display the effectiveness of varying each parameter</p> ... Show More

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Publication Date

Sun Jun 23 2019

Journal Name

American Rock Mechanics Association

Using an Analytical Model to Predict Collapse Volume During Drilling: A Case Study from Southern Iraq

reservoir geomechanics

strength

Rock mechanics

borehole collapse

Reservoir Characterization

Upstream Oil & Gas

pore pressure

Wellbore Design

horizontal stress

Drilling

Ahmed K.

Asmaa

Usama

Ralph E.

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Zubair Formation is one of the richest petroleum systems in Southern Iraq. This formation is composed mainly of sandstones interbedded with shale sequences, with minor streaks of limestone and siltstone. Borehole collapse is one of the most critical challenges that continuously appear in drilling and production operations. Problems associated with borehole collapse, such as tight hole while tripping, stuck pipe and logging tools, hole enlargement, poor log quality, and poor primary cement jobs, are the cause of the majority of the nonproductive time (NPT) in the Zubair reservoir developments. Several studies released models predicting the onset of borehole collapse and the amount of enlargement of the wellbore cross-section. However, assump

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Publication Date

Mon May 27 2019

Journal Name

Al-academy

Pluralism in Tuning the Contemporary Arab Oud Strings - Egyptian and Iraqi Schools Model: فراس ياسين جاسم

oud schools --- Egyptian school --- Iraqi school. Oud of five --- six and seven strings

Firas

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The Egyptian and Iraqi schools are one of the most important musical schools in the style of playing the oud. The influence of the style of these schools extended in the contemporary Arab world, and there were important names that emerged characterized with their style of playing. Thus, the ways of tuning the strings of oud varied between the two schools because of the difference in the ways of playing and the difference in the style of expression. The aim of the research was to identify the pluralism of the variable tunings of the strings of the contemporary Arab oud of the Egyptian and Iraqi schools, along the historical period extending from the late nineteenth and twentieth centuries to the present time. The oud has been classified i

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Publication Date

Tue Jan 01 2019

Journal Name

The 53rd U.s. Rock Mechanics/geomechanics Symposium

Using an analytical model to predict collapse volume during drilling: A case study from southern Iraq

A.K.

uSAMA

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(7)

Publication Date

Tue Mar 01 2022

Journal Name

Results In Engineering

Predictive model for stress at ultimate in internally unbonded steel tendons based on genetic expression programming

Nazar K.

Iqbal

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(17)

Publication Date

Sun Dec 02 2018

Journal Name

Journal Of The College Of Education For Women

Poverty and its Relations to Some Social Variables (Children in the Primary Stage as a Model)

Ibtisam Hadi

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The phenomenon of poverty is one of the most important phenomena facing the world at large. Despite the tremendous technological progress witnessed by mankind and despite the unprecedented high levels of world economic production, poverty remains the greatest challenge facing the world. Statistics and studies have shown that poverty is caused by several problems: (health, social, economic, educational, etc.) These problems are obstacles to the ability to obtain employment opportunities, which leads in the beginning to the growth phenomenon of unemployment, and ultimately to the growth of poverty.

The results of a range of research in the field of psychology have confirmed that children from poor homes suffer from a high level of

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Publication Date

Fri Mar 04 2022

Journal Name

Environmental Science And Pollution Research

Geographically weighted regression model for physical, social, and economic factors affecting the COVID-19 pandemic spreading

Ihsan Abbas

Moheb Kamil

Mustafa A.

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Abstract<p>This study aims to analyze the spatial distribution of the epidemic spread and the role of the physical, social, and economic characteristics in this spreading. A geographically weighted regression (GWR) model was built within a GIS environment using infection data monitored by the Iraqi Ministry of Health records for 10 months from March to December 2020. The factors adopted in this model are the size of urban interaction areas and human gatherings, movement level and accessibility, and the volume of public services and facilities that attract people. The results show that it would be possible to deal with each administrative unit in proportion to its circumstances in light of the factors that appe</p> ... Show More

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(14)

Publication Date

Wed Oct 17 2018

Journal Name

Journal Of Economics And Administrative Sciences

Comparison Between the Methods Estimate Nonparametric and Semiparametric Transfer Function Model in Time Series Using Simulation

Munaf Yousif

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