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Wyszukujesz frazę "Abbas, Ibrahim" wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    A Study of Generalized Thermoelastic Interaction in an Infinite Fibre-Reinforced Anisotropic Plate Containing a Circular Hole
    Autorzy:
    Abbas, Ibrahim
    Abd-alla, Abo-el-nour
    Powiązania:
    https://bibliotekanauki.pl/articles/1505045.pdf
    Data publikacji:
    2011-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    46.25.Hf
    81.05.Ni
    02.70.Dh
    Opis:
    In the context of Lord and Shulman theory, the generalized thermoelastic theory with thermal relaxation is used to investigate the thermoelastic interaction in an infinite fibre-reinforced anisotropic plate containing a circular hole. Thermoelastic interactions are caused by a uniform step at temperature applied to the boundary of the hole which is stress-free. The problem is solved numerically using a finite element method and the numerical solutions of the non-dimensional governing partial differential equations of the problem are shown graphically. The effects of the presence and absence reinforcement on temperature, stress and displacement are studied.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 6; 814-818
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical study of the effect the hydroxyl subgroups on the electronic properties of iso-indene molecule
    Autorzy:
    Obayes, Abbas Ibrahim
    Hasan, Nahida B.
    Aboud, Hamed Ibrahem
    Mohammed, Mohammed Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/1191969.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    DFT
    energy gap
    ionization potential
    hardness and IR-spectrum
    Opis:
    In this work, six molecules model are optimized at B3LYP/6-31G** density functional theory. Electronic properties of iso-indene molecules were investigated depending on the three parameters (B3LYP) by density functional theory method. The best geometry for all molecules were investigated at (6-31G**) basis sets. The total energies, energy gaps, ionization potentials, electron affinities and softness were calculated for the studied molecules. Adding the (OH) ion and Nitrogen, Sulfur atoms to the iso-indene molecules leads to decrease the energy gap and the hardness of the studied molecules. The IR-spectra shows the effect of adding the (OH) ion and Nitrogen, Sulfur atoms in the ring on the vibrations of the reference molecule, the electronic properties and IR spectrum for all molecules were investigated by Gaussian 03 program.
    Źródło:
    World Scientific News; 2016, 50; 49-63
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of multi extrusion die process on mechanical and chemical behavior of 2024-T3 alloy
    Autorzy:
    Razooqi, Ahmed Ibrahim
    Abbas, Naseer M.
    Ghazi, Sara Saad
    Powiązania:
    https://bibliotekanauki.pl/articles/2174206.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wyciskanie
    odkształcenie plastyczne
    korozja elektrochemiczna
    Al 2024-T3
    extrusion
    plastic deformation
    electrochemical corrosion
    Opis:
    In this paper, a cold multi-pass extrusion process for a 15mm in diameter solid 2024-T3 aluminum alloy rod was carried out using three dies to obtain three different diameters of 14mm, 13mm, and 12mm. The microstructure, hardness, and corrosion behavior were investigated before and after the extrusion process. Load-Displacement data were recorded during each extrusion process. The electrochemical corrosion test was made in a 3.5 wt.% NaCl solution using potentiostat instrument under static potentials test. Corrosion current was recorded to determine the corrosion rate for specimens. The results showed that the extrusion load increased with the number of extrusion passes, which is also seen in hardness test results. In addition, the corrosion rate decreased with the increase in the number of extrusion passes. This is due to severe plastic deformation, which generates a fine grain structure of (AlCu) and (AlCuMg) components.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2022, 27, 3; 163--170
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of Radon-222 Concentrations in Selected Soil Samples in Al-Mothafeen Area (Kerbala, Iraq) by Using the CN-85 Detector
    Autorzy:
    Ibrahim, Abrrar Abbas
    Hashim, Abdalsattar Kareem
    Abojassim, Ali Abid
    Powiązania:
    https://bibliotekanauki.pl/articles/2088173.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    alpha emitters
    222Rn
    226Ra
    238U
    annual effective dose
    soil
    CN-85
    Kerbala University
    Opis:
    In this work, alpha emitters in the twenty soil samples in Al-Mothafeen sites were measured using the CN-85 detectors. The results show that the average values of radon concentration in the air space of the tube and in the sample were 163.15±3.37 Bq/m3 and 5090.54±155.3 Bq/m3, respectively, while the results of annual effective dose were varied from 10.2±0.3 mSv/y to 2.1±0.1 mSv/y with a mean value of 4.1±0.2 mSv/y, radium content were varied from 0.3±0.06 Bq/kg-1 to 0.06±0.02 Bq/kg with a mean value of 0.12±0.03 Bq/kg, and uranium contractions were varied from 9.29±0.33 Bq/kg to 1.90±0.15 Bq/kg with an average of 3.72±0.21 Bq/kg. Also, the average values of mass and surface exhalation rates were 0.95±8.64 mBq/kg.h and 44.59±0.79 mBq/m2.h, respectively. The results were within the normal limits of radiation, according to the International Commission on Radiological Protection (ICRP).
    Źródło:
    Polish Journal of Soil Science; 2021, 54, 2; 139-153
    0079-2985
    Pojawia się w:
    Polish Journal of Soil Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenol Biosorption from Polluted Aqueous Solutions by Ulva lactuca Alga Using Batch Mode Unit
    Autorzy:
    Abbas, Mohammed Nsaif
    Al-Hermizy, Suadat Mustafa Mohammed
    Abudi, Zaidun Naji
    Ibrahim, Thekra Atta
    Powiązania:
    https://bibliotekanauki.pl/articles/124215.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    sea lettuce
    Ulva lactuca
    adsorption
    phenol
    aqueous solutions
    isotherm
    thermodynamic
    Opis:
    This paper is related to study the using sea lettuce (Ulva lactuca) as a low-cost adsorbent for removing the phenol compounds from aqueous solutions by adsorption under different operating conditions in a batch unit. The SEM and FTIR tests were performed to determine the morphological characteristics and the functional groups existing on the adsorbent material, respectively, while the surface area was identified by means of two techniques which were blue color method and BET method. The results of the adsorption experiments showed that the efficiency of the removal process is inversely proportional with initial concentration of phenol, pH and temperature; while the efficiency was directly proportional to adsorbent amount, agitation speed and treatment time. The results showed that the percentage of removal of phenol from processed water solutions ranged from 25.446% to 90.125%. The Langmuir and Freundlich isotherm models were chosen to estimate the amounts of phenol adsorption by the sea lettuce powder. The kinetic study shows that the adsorption was obeyed pseudo second order also the thermodynamic parameters were calculated.
    Źródło:
    Journal of Ecological Engineering; 2019, 20, 6; 225-235
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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