Study the Effect of the High Voltage on The preparation of Polyvinyl Alcohol/ Tio2 Nano Fiber by Electrospinning

A. H. AL-Wattar

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Publication Date

Wed Dec 30 2009

Journal Name

Iraqi Journal Of Physics

Volume

7

Issue Number

8

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Study the Effect of the High Voltage on The preparation of Polyvinyl Alcohol/ Tio2 Nano Fiber by Electrospinning

Polyvinyl Alcohol/ Tio2 Nano Fiber

A. H. AL-Wattar

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In this research we prepared nanofibers by electrospinning
from poly (Vinyl Alcohol) / TiO2. The spectrum of the solution
(Emission) was studied at 772 nm. Several process parameter were
Investigated as concentration of PVA, the effect of distance from
nozzle tip to the grounded collector (gap distance), and final the
effect of high voltage. We find the optimum condition to prepare a
narrow nanofibers is at concentration of PVA 16gm, the fiber has
20nm diameter

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Publication Date

Fri Dec 01 2023

Journal Name

Baghdad Science Journal

Numerical Investigation of Physical Parameters in Cardiac Vessels as a New Medical Support Science for Complex Blood Flow Characteristics

Blood flow

Finite element analysis

Heart

Navier-Stokes

Vessels.

Defrianto

Toto

Yan

Andika

Bunga

Romi Fadli

Okfalisa

Syamsudhuha

Dedi

Haryana

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This study proposes a mathematical approach and numerical experiment for a simple solution of cardiac blood flow to the heart's blood vessels. A mathematical model of human blood flow through arterial branches was studied and calculated using the Navier-Stokes partial differential equation with finite element analysis (FEA) approach. Furthermore, FEA is applied to the steady flow of two-dimensional viscous liquids through different geometries. The validity of the computational method is determined by comparing numerical experiments with the results of the analysis of different functions. Numerical analysis showed that the highest blood flow velocity of 1.22 cm/s occurred in the center of the vessel which tends to be laminar and is influe

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(3)

Publication Date

Thu Feb 06 2020

Journal Name

Scientific Reports

Waste foundry sand/MgFe-layered double hydroxides composite material for efficient removal of Congo red dye from aqueous solution

Dooraid N.

Laith A.

Ayad A. H.

Nadhir

Mu

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Abstract<p>We aimed to obtain magnesium/iron (Mg/Fe)-layered double hydroxides (LDHs) nanoparticles-immobilized on waste foundry sand-a byproduct of the metal casting industry. XRD and FT-IR tests were applied to characterize the prepared sorbent. The results revealed that a new peak reflected LDHs nanoparticles. In addition, SEM-EDS mapping confirmed that the coating process was appropriate. Sorption tests for the interaction of this sorbent with an aqueous solution contaminated with Congo red dye revealed the efficacy of this material where the maximum adsorption capacity reached approximately 9127.08 mg/g. The pseudo-first-order and pseudo-second-order kinetic models helped to describe the sorption measure</p> ... Show More

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(129)

Publication Date

Fri Dec 01 2023

Journal Name

Applied Energy

Deep clustering of Lagrangian trajectory for multi-task learning to energy saving in intelligent buildings using cooperative multi-agent

Jasim

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The intelligent buildings provided various incentives to get highly inefficient energy-saving caused by the non-stationary building environments. In the presence of such dynamic excitation with higher levels of nonlinearity and coupling effect of temperature and humidity, the HVAC system transitions from underdamped to overdamped indoor conditions. This led to the promotion of highly inefficient energy use and fluctuating indoor thermal comfort. To address these concerns, this study develops a novel framework based on deep clustering of lagrangian trajectories for multi-task learning (DCLTML) and adding a pre-cooling coil in the air handling unit (AHU) to alleviate a coupling issue. The proposed DCLTML exhibits great overall control and is

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Publication Date

Tue Jun 01 2021

Journal Name

Swarm And Evolutionary Computation

A review of heuristics and metaheuristics for community detection in complex networks: Current usage, emerging development and future directions

Bara'a Ali

Amenah D.

Ammar A

Clara

Mayyadah

Suat

Rawaa Dawoud

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Publication Date

Wed Sep 01 2021

Journal Name

Meta Gene

Genetic polymorphism of IL-17A (rs2275913) in Iraqi women with recurrent abortion and its relationship with susceptibility to toxoplasmosis

Kuba R.H.

Entsar J. Saheb

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Publication Date

Sat Feb 01 2025

Journal Name

Advanced Journal Of Chemistry, Section A

Synthesis and Characterization of Heterocyclic Derivatives to Evaluate their Efficiency as Corrosion Inhibitors for Carbon Steel in Saline Medium

Corrosion inhibition Heterocyclic rings Corrosion cell Polarization curve

Wadhah Naji

Oday H.R.

Noor Ali

Andy N. S.

Nadia A.

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This work includes preparation of Az, Qz, and Tz derivatives from the reaction of Schiff base (Sb) derivative with anthranilic acid, chloroacetyl chloride, and sodium azide, as well as, the characterization via FT-IR, 1H-NMR, and 13CNMR. The anticorrosion inhibition of these compounds was studied and the measurements of carbon steel (CS) corrosion in sodium chloride solution 3.5% (blank) and inhibitor in solutions were calculated at a temperature range of 293-323 K by the technique of electrochemical polarization. In addition, some thermodynamic and kinetic activation parameters for inhibitor and blank solutions (Ea⋇, ΔH⋇, ΔS⋇, and ΔG⋇) were determined. The results showed high inhibition efficacy for all the prepared compounds,

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(9)

Publication Date

Sun Jan 01 2023

Journal Name

Saudi Endodontic Journal

Comparison of root canal transportation and centering after instrumentation through conservative and traditional access cavities using different file systems

Samer Abbas

Anas Falah

Ahmed Hamid

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Introduction:

While conservative access preparations could increase fracture resistance of endodontically treated teeth, it may influence the shape of the prepared root canal. The aim of this study was to compare the prepared canal transportation and centering ability after continuous rotation or reciprocation instrumentation in teeth accessed through traditional or conservative endodontic cavities by using cone-beam computed tomography (CBCT).

Materials and Methods:

Forty extracted intact, matured, and 2-rooted human maxillary first premolars were selected for this

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(9)

(8)

Publication Date

Sun Oct 13 2019

Journal Name

Spe Kuwait Oil & Gas Show And Conference

Optimization of Fracture Parameters for Hydraulic Fractured Horizontal Well in a Heterogeneous Tight Reservoir: An Equivalent Homogeneous Modelling Approach

upstream oil & gas

equivalent homogeneous model

heterogeneous model

optimum number

hydraulic fracturing

simulation model

tight gas reservoir

saturation

model 1

optimization

Omar

Mofazzal

Asaad

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Abstract<p>Building numerical reservoir simulation model with a view to model actual case requires enormous amount of data and information. Such modeling and simulation processes normally require lengthy time and different sets of field data and experimental tests that are usually very expensive. In addition, the availability, quality and accessibility of all necessary data are very limited, especially for the green field. The degree of complexities of such modelling increases significantly especially in the case of heterogeneous nature typically inherited in unconventional reservoirs. In this perspective, this study focuses on exploring the possibility of simplifying the numerical simulation pr</p> ... Show More

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(25)

(17)

Publication Date

Tue Aug 23 2022

Journal Name

Frontiers In Energy Research

Evaluation of T-Shaped Fins With a Novel Layout for Improved Melting in a Triple-Tube Heat Storage System

Mohammadreza

Hayder I.

Raed Khalid

Anmar

Jasim M.

Hasan

Mohammad Mehdi

Pouyan

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The effects of T-shaped fins on the improvement of phase change materials (PCM) melting are numerically investigated in vertical triple-tube storage containment. The PCM is held in the middle pipe of a triple-pipe heat exchanger while the heat transfer fluid flows through the internal and external pipes. The dimension effects of the T-shaped fins on the melting process of the PCM are investigated to determine the optimum case. Results indicate that while using T-shaped fins improves the melting performance of the PCM, the improvement potential is mainly governed by the fin’s body rather than the head. Hence, the proposed T-shaped fin did not noticeably improve melting at the bottom of the PCM domain; additionally, a flat fin is ad

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(40)

Publication Date

Sun Feb 01 2026

Journal Name

Energy

Smart buildings envelope utilise triple PCM for offset and reduce peak load using deep clustering of multi-agent control

Raad Z.

Hayder I.

Amjad

Jasim M.

Mahmood A.

Farhan L.

Ahmed K.

Fadhel N.

Musatafa A.A.

Hussein

Nabeel S.

Zaher Mundher

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