A Posteriori L_∞ (L_2 )+L_2 (H^1 )–Error Bounds in Discontinuous Galerkin Methods For Semidiscrete Semilinear Parabolic Interface Problems

Younis Abid Sabawi

doi:10.21123/bsj.2021.18.3.0522

Details

Publication Date

Wed Sep 01 2021

Journal Name

Baghdad Science Journal

Volume

18

Issue Number

3

DOI

10.21123/bsj.2021.18.3.0522

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A Posteriori L_∞ (L_2 )+L_2 (H^1 )–Error Bounds in Discontinuous Galerkin Methods For Semidiscrete Semilinear Parabolic Interface Problems

A posteriori error estimates

Discontinuous Galerkin methods

Interface semilinear parabolic problems.

Younis Abid Sabawi

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The aim of this paper is to derive a posteriori error estimates for semilinear parabolic interface problems. More specifically, optimal order a posteriori error analysis in the - norm for semidiscrete semilinear parabolic interface problems is derived by using elliptic reconstruction technique introduced by Makridakis and Nochetto in (2003). A key idea for this technique is the use of error estimators derived for elliptic interface problems to obtain parabolic estimators that are of optimal order in space and time.

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Publication Date

Sun Oct 01 2023

Journal Name

Baghdad Science Journal

Numerical Investigation, Error Analysis and Application of Joint Quadrature Scheme in Physical Sciences

Center of gravity

Convergence analysis

Density function

Degree of Precision

Joint quadrature

Maclaurin's series. MSC 2010:65D30

65D32

Saumya Ranjan

Damayanti

Mitali Madhumita

Satya Kumar

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In this work, a joint quadrature for numerical solution of the double integral is presented. This method is based on combining two rules of the same precision level to form a higher level of precision. Numerical results of the present method with a lower level of precision are presented and compared with those performed by the existing high-precision Gauss-Legendre five-point rule in two variables, which has the same functional evaluation. The efficiency of the proposed method is justified with numerical examples. From an application point of view, the determination of the center of gravity is a special consideration for the present scheme. Convergence analysis is demonstrated to validate the current method.

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Publication Date

Wed Jan 26 2022

Journal Name

International Journal Of Agricultural And Statistical Sciences

EFFECT OF CONTINUOUS AND DISCONTINUOUS LEACHING OF CALCIUM AND MAGNESIUM RELEASE FROM SOME CALCAREOUS SOIL

Shatha

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Publication Date

Sat Jun 04 2022

Journal Name

Al–bahith Al–a'alami

Iraq's Image in the British Press An analytical study of the Guardian and The Daily Telegraph for 1 / 1- 31/3/2019: Research extracted from a master's thesis

Media Photo

British Press Iraq

Samir

Noah

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The topic of the research dealt with the image of Iraq in the British press based on a sample of the newspapers (The Guardian and the Daily Telegraph), which are among the most important and largest newspapers in the United Kingdom and the world, because of its active role in guiding local and international public opinion towards important issues and events, Since these two newspapers are interested in the accuracy of sensitive political topics, the message aimed at knowing the media image that these two newspapers painted about Iraq in the period that was limited to the first quarter of 2019, and also to know the nature of the contents promoted by these newspapers about the Iraqi reality, The method of content analysis was used as an ap

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Publication Date

Thu May 02 2024

Journal Name

Petroleum And Coal

Wellbore Instability Analysis to Determine the Failure Criteria for Deep Well/H Oilfield

Bandara M.K.

Nagham Jasim Al-Ameri

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(3)

Publication Date

Sun Dec 01 2013

Journal Name

Toxicon

Methods for simultaneous detection of the cyanotoxins BMAA, DABA, and anatoxin-a in environmental samples

Maitham

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Publication Date

Thu Jun 16 2022

Journal Name

Periodicals Of Engineering And Natural Sciences (pen)

Optimization algorithms for transportation problems with stochastic demand

Marwan Abdul Hameed

Alyaa Abdulameer

Ammar Sh.

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The purpose of this paper is to solve the stochastic demand for the unbalanced transport problem using heuristic algorithms to obtain the optimum solution, by minimizing the costs of transporting the gasoline product for the Oil Products Distribution Company of the Iraqi Ministry of Oil. The most important conclusions that were reached are the results prove the possibility of solving the random transportation problem when the demand is uncertain by the stochastic programming model. The most obvious finding to emerge from this work is that the genetic algorithm was able to address the problems of unbalanced transport, And the possibility of applying the model approved by the oil products distribution company in the Iraqi Ministry of Oil to m

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Publication Date

Thu Mar 23 2023

Journal Name

Journal Of Applied Science And Engineering

Strong Fenchel Duality for Evenly Convex Optimization Problems

Saba

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Among a variety of approaches introduced in the literature to establish duality theory, Fenchel duality was of great importance in convex analysis and optimization. In this paper we establish some conditions to obtain classical strong Fenchel duality for evenly convex optimization problems defined in infinite dimensional spaces. The objective function of the primal problem is a family of (possible) infinite even convex functions. The strong duality conditions we present are based on the consideration of the epigraphs of the c-conjugate of the dual objective functions and the ε-c-subdifferential of the primal objective functions.

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Publication Date

Wed Jun 10 2026

Journal Name

Journal Of Baghdad College Of Dentistry

An in-vitro scan electron microscope comparative study of dentine-Biodentine interface

Jameel M

Maha M

Wiaam M

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Background: Restoration of the gingival margin of Class II cavities with composite resin continues to be problematic, especially where no enamel exists for bonding to the gingival margin. The aim of study is to evaluate the marginal leakage at enamel and cementum margin of class II MOD cavities using amalgam restoration and modern composite restorations Filtek™ P90, Filtek™ Z250 XT (Nano Hybrid Universal Restorative) and SDR bulk fill with different restoratives techniques. Materials and method: Eighty sound maxillary first premolar teeth were collected and divided into two main groups, enamel group and cementum group (40 teeth) for each group. The enamel group was prepared with standardized Class II MOD cavity with gingival margin (1 m

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Publication Date

Sat May 31 2025

Journal Name

3rd International Scientific Conference For Human And Social Studies And Epistemological Challenges

Frankenstein Complex in Daniel H. Wilson's Robopocalypse ( ): Artificial Intelligence Conspiracies

With the advent of technology

the fear of losing control has consistently accompanied humanity. While humans have discovered

invented

and created many remarkable things

they have also been haunted by the possibility of their creations turning against them. This fear

often referred to as the Frankenstein Complex

derives its name from Mary Shelley's Frankenstein (􀀔􀀛􀀔􀀛)

in which Dr. Frankenstein's creation ultimately destroys its maker. The Frankenstein Complex embodies the subconscious fear of artificial intelligence (AI) surpassing and potentially dominating humankind. This apprehension has inspired numerous literary works

including Daniel H. Wilson’s novels. The present study examines the widespread fear of AI

which has fueled conspiracy theories in literature. These theories have not only amplified public anxiety but also hindered understanding among those with limited knowledge of AI and robotics. Dr. Wilson

a robotics expert

uses his imagination as a driving force for both his writing and his inventions. The research focuses on incidents leading to the rise of robots

the concept of the New War

how it was fought

and how it concluded. By comparing

contrasting

and analyzing literary elements and devices with prominent conspiracy theories

the study highlights the interplay between fiction and scientific development. The researchers conclude that while many conspiracy theories contain elements of truth

they often inspire scientists to explore them further. Additionally

some conspiracy theories warrant serious consideration. The study recommends acknowledging the Frankenstein Complex while maintaining faith in the potential benefits of artificial intelligence.

Ansam

Mayada

Zahraa

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Publication Date

Sun Dec 18 2022

Journal Name

College Of Education For Women

Investigating Iraqi EFL Teachers Problems with English for Iraq Series

EFL teachers

English for Iraq

Problems

Public-Primary Schools

Solutions

Maysaa Rashid Abdul-Majeed

Dhuha Qais

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Iraqi EFL teachers face problems in teaching “English for Iraq Series” for primary public school pupils. In this paper, the researchers are going to identify the main problems faced by our teachers and try to find solutions to these problems. To achieve the aim of the study, list of questions asked and from teachers’ responses, the researchers have got an idea about the main problems which are related to textbook material, parents, learners, environment and technology. Therefore, the researchers adapted a questionnaire to achieve the purpose of the study with some changes and modifications. This questionnaire with five point scale (strongly agree, agree, undecided, disagree, strongly disagree). To achieve face validity, the

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