Study the contrast of thermal expansion behavior for PMMA denture base, single and hybrid reinforced using the thermomechanical analysis technique (TMA)

shahad ali Hussein; Abdulhameed Al-Sarraf

doi:10.1063/5.0129372

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Publication Date

Sun Jan 01 2023

Journal Name

Technologies And Materials For Renewable Energy, Environment And Sustainability: Tmrees22fr

DOI

10.1063/5.0129372

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Study the contrast of thermal expansion behavior for PMMA denture base, single and hybrid reinforced using the thermomechanical analysis technique (TMA)

bioactive

bioinert

hybrid composite

thermal conductivity

thermal mechanical analysis (TMA).

shahad ali Hussein

Abdulhameed Al-Sarraf

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Publication Date

Mon Feb 04 2019

Journal Name

Iraqi Journal Of Physics

Nonlinear optical properties of synthesized porous nanostructures PMMA via template-directed methods

Z-scan

template

PMMA.

Zainab F.

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Colloidal crystals (opals) made of close-packed polymethylmethacrylate (PMMA) were fabricated and grown by Template-Directed methods to obtain porous materials with well-ordered periodicity and interconnected pore systems to manufacture photonic crystals. Opals were made from aqueous suspensions of monodisperse PMMA spheres with diameters between 280 and 415 nm. SEM confirmed the PMMA spheres crystallized uniformly in a face-centered cubic (FCC) array. Optical properties of synthesized pores PMMA were characterized by UV–Visible spectroscopy. It shows that the colloidal crystals possess pseudo photonic band gaps in the visible region. A combination of Bragg’s law of diffraction and Snell’s law of refraction were used to calculate t

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Publication Date

Sun Aug 18 2019

Journal Name

Proceedings Of Mechanical Engineering Research Day 2019,

Study of sound absorption of micro perforated panel with visco-thermal effects

Sound absorption

inhomogeneous MPP

finite element method (FEM)

Esraa

Azma

Ali

R. M.

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Publication Date

Mon Nov 11 2019

Journal Name

Spe

Modeling Rate of Penetration using Artificial Intelligent System and Multiple Regression Analysis

neural network

strength

machine learning

ROP prediction

Upstream Oil & Gas

prediction

ANN model

input parameter

multiple regression analysis

artificial neural network

Farqad

Hassan

Ethar

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AbstractOver the years, the prediction of penetration rate (ROP) has played a key rule for drilling engineers due it is effect on the optimization of various parameters that related to substantial cost saving. Many researchers have continually worked to optimize penetration rate. A major issue with most published studies is that there is no simple model currently available to guarantee the ROP prediction.The main objective of this study is to further improve ROP prediction using two predictive methods, multiple regression analysis (MRA) and artificial neural networks (ANNs). A field case in SE Iraq was conducted to predict the ROP from a large number of parame ... Show More

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(8)

Publication Date

Thu Jan 21 2021

Journal Name

Iop Conf. Series: Materials Science And Engineering

Synthesis, spectroscopic study, biological activity and dyeing application of curcumin - Schiff base with various metal ions complexes

Taghreed

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A tetradentate (N2O2) Schiff base (H2Ldfm) was successfully synthesized via condensation of curcumin / diferuloylmethane (dfm) and L-leucine amino acid (HL). There were three different methods that used for synthesizing H2Ldfm; (refluxing, grading, and fusion). Ten different metal complexes were also successfully synthesized by combination of the Schiff base (H2Ldfm) and 1,10-phenanthroline (phen) ligand to form a hexadentate (N4O2) mixed ligands (Ldfm , phen) with ten different metal salts (M) where{ M= Al(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Ag(I), Cd(II), Hg(II), and Pb(II)}. The molar ratio of reactants was (1:1:1) (M: H2Ldfm : phen). The new Schiff base and its new complexes were characterized by different physicochemical tec

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Publication Date

Tue Jun 01 2010

Journal Name

Journal Of Economics And Administrative Sciences

Status Judgment : New Insight into the Promoting Process of Entrepreneurial Behavior

سعد علي

عامر حسين

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The present study aims to explore determinants of entrepreneurial behavior from perspective of social theory. It is based on model notions of (Tyler & Blader, 2003) which have focused on studying role of positively personal and social identity in motivating employees to practicing desired behavior which serves the organization in which they work. Based on these notions and previous literature, study model were built. This model explains the relationship between status judgments (perceived internal respect and perceived external prestige) and entrepreneurial behavior. It includes three main hypotheses. The first and second hypothesis are concerning the relationship between status judgmen

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Publication Date

Sun Mar 01 2020

Journal Name

Iop Conference Series: Materials Science And Engineering

The Behavior of Scouring Around Multiple Bridge Piers Having Different Shapes

Basim Sh.

Hayder Q.

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AbstractIn this research, a numerical simulation was conducted to study the behavior of the scouring pattern and the effect of spacing between bridge piers at specified hydraulic conditions such as velocity, depth of flow, and the sediment effective diameter. Moreover, the cross-section shape of piers and their effect on the scouring depth around bridge piers was studied, using Computational Fluid Dynamics (CFD), ANSYS (Fluent) software. A comparison of the simulation results obtained with previous laboratory investigations was done to verify the validity of the numerical model. Generally, the scour pattern using the CFD software gave good agreement with the experimental study. A reversed pro ... Show More

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Publication Date

Thu Dec 31 2020

Journal Name

Journal Of Accounting And Financial Studies ( Jafs )

Financial analysis indicators and their impact on investment decision-making: for the national insurance company (applied research)

Financial Analysis Financial indicators) Liquidity ratios

activity ratios

profitability ratios (

Investment - investment decision

rate of realization of investment size

rate of investment returns

يسر فائق

.م.د. علاء عبد الكريم

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The financial analysis of the published financial statements is the means that enables businessmen, financial institutions, financial analysts and others to conduct their studies and conclusions to obtain information that helps them in the decision-making process, including decisions related to investment. National in making the decision on the investment activity, for the period from 2012 to 2018, through the information provided by the annual financial statements, by selecting a set of indicators provided by the financial statements, namely (liquidity ratio, activity percentage, profitability ratios) to measure the extent of this ability Indicators in determining their role in making an investment decision.

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Publication Date

Mon Jun 29 2015

Journal Name

Separation Science And Technology

An acidic injection well technique for enhancement of the removal of copper from contaminated soil by electrokinetic remediation process

Ayad A.H.

Ahmed A.

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(16)

(5)

Publication Date

Wed May 01 2019

Journal Name

Materials Science And Engineering

Analysis of Wind Turbine Using QBlade Software

Mustafa

Oday

Mahir H.

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(48)

Publication Date

Mon Feb 28 2022

Journal Name

Structural Chemistry

Sensitivity of SnO2 nanoparticles/reduced graphene oxide hybrid to NO2 gas: A DFT study

Shaima K.

Mudar Ahmed

Mohammed T.

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AbstractThe sensitivity of SnO2 nanoparticles/reduced graphene oxide hybrid to NO2 gas is discussed in the present work using density functional theory (DFT). The SnO2 nanoparticles shapes are taken as pyramids, as proved by experiments. The reduced graphene oxide (rGO) edges have oxygen or oxygen-containing functional groups. However, the upper and lower surfaces of rGO are clean, as expected from the oxide reduction procedure. Results show that SnO2 particles are connected at the edges of rGO, making a p-n heterojunction with a reduced agglomeration of SnO2 particles and high gas sensitivity. The DFT results are in ... Show More

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