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References [1] AGGARWAL P, SYED Z, NOURELDIN A, et al.
[4] HAMID W A, NOURELDIN A, EL-SHEIMY N.
[6] NOURELDIN A, EL-SHAFI A, BAYOUMI M.

The metal foams modelling with anisotropic cells Kaoua Sid Ali1,a, Haddad Meriem 2,b,Dahmoun Djaffar1,c and Azzaz Mohammed1,d 1Université des Sciences et de la Technologie Houari Boumediène (USTHB) Laboratoire des Sciences et de Génie des Matériaux (LSGM), FGMGP, BP 32 El-Allia, 16111 Bab Ezzouar, Algiers, Algeria. 2Université des Sciences et de la Technologie Houari Boumediène (USTHB) Laboratoire des Sciences Nucléaires (LSN), Faculté de Physique, BP 32 El-Allia, 16111 Bab Ezzouar, Algiers, Algeria.
Three-dimensional open cell structures are studied by Luxner [5] and Luxner et al. [6] using a periodic microfield approach.

In the research process and experiment, we found there are many high precision instruments like scanning electron microscopy (SEM), morphology instrument et al… to measure the sample’s surface topography, however, due to the special requirements of these equipments that they could not meet the need of all kinds of measurement.
[5] Yashiro S, Takatsubo J, Miyauchi H el a1.. : A Novel Technique for Visualizing Ultrasonic Waves in General Solid Media by Pulsed Laser Scanr.
[6] Xiaobo Hou, Afshin Daryoush, Warren Rosen el a1.. : A Novel All-Optical Analog-to-Digital Converter.

Under the excitations of the two horizontal components motions of Loma, San Fernando and El Centro earthquakes, the global damage process of the structure is shown in figure 3, and the damage evolution of each story are shown in figure 4.
From figure 3, it is indicated that under 0.683g Loma Prieta, San Fernando and El Centro earthquakes, the global damage index are 0.0162, 0.0119 and 0.0122, and it is close to collapse at the PGA (Peak Ground Acceleration) of 1.23g.
Steglich, et al.: Int J Plasticity Vol.22-11 (2006), p 2146 [5] O.S.

The first systematic approach for the assessment of hydrogen resources of a hydrogen network was proposed by Towler et al. based on cost and value composite curves [2].
El-Halwagi et al. used graphical method and mass exchanger network (MEN) to minimize fresh sources [4].
Fonseca et al. employed the linear programming model to optimize hydrogen network refinery which leaded to a 30% reduction in hydrogen utility usage [6].
Khajehpour et al. proposed objective functions to minimize waste flows containing hydrogen and reduced hydrogen production [7].
El-Halwagi, F.

Migration of Thermal Vacancies in Quenched Pure AA1050 by Positron Annihilation Emad A.Badawi*, M.A.Abdel-Rahman, E.M.Hassen, M.Abdel-Rahman and M.O.Abdel-Hamed Physics Department, Faculty of Science, El-Minia University, El-Minia, Egypt *emadbadawi@yahoo.com Keywords: AA1050 Ingot, Lifetime, Migration Enthalpy, Thermal Vacancies Abstract A description of positron annihilation spectroscopy (PAS) in solids is given in terms of a trapping model.
Pure Al 165.0ps - - AA1050 170.2ps 203ps 898K 2.
Al Alloy {1050} Mean Lifetim e τ ( ps ) Artificial Aging Time at RT (h.) 8).
The normalization curves for 1050 Al-alloy. 343 K 353 K 348 K 338 K Al-alloy (1050).
Al-alloy 1050.

Kennedy [5] has been proposed that the ratio of γ’/γ”(δ) can be increased by adjusting the Al/Ti ratio (calculated by at%) to 4.
Compared to the In718 ingot, In718-M ingot has different Al (1.45 wt%), Ti (0.70 wt%), Nb (4.47 wt%) and W (1.75 wt%) contents.
Amato et al. [7].
Tensile properties of the experimental alloys Tensile properties RT 650℃ Specimens UTS(MPa) YS(MPa) EL(%) UTS(MPa) YS(MPa) EL(%) as-cast In718 993 815 8.0 805 704 9.6 as-cast In718-M 971 758 7.0 850 755 9.8 as-build In718 1010 755 16.6 815 665 14.0 as-build In718-M 1060 775 27.8 865 745 13.4 4.
Compared to the In718 ingot, In718-M ingot has different Al (1.45 wt%), Ti (0.70 wt%), Nb (4.47 wt%) and W (1.75 wt%) contents.

Sivakumar et al [1] machined AISI D3 steel using Taguchi L18 OA in WEDM.
Shanmuga prakash et al [5] reviewed the machining of tool and die steel in WEDM.
El-Taweel et al [3] investigated the effects of machining parameters of wire electric discharge machining of inconel 601 using responsive surface methodology.
Kanlayasiri et al [6] investigated the wedm machining parameters for better surface finish in DC53 die steel effectively.
Ko-Ta Chiang et al [7], done an analysis on SG cast iron getting better surface roughness using RSM while machining in EDM.

Abd El- Razik1,a* H.M.
Taha4,d 1,2Building Physics Institute -Housing and Building National Research Center (HBRC) - 87 El –Tahrir St., Dokki, P.O.
Student, Engineer – Cairo – Egypt 4Reinforced Concrete Institute - Housing and Building National Research Center (HBRC) - 87 El –Tahrir St., Dokki, P.O.
[16] Soussi, Yamna, et al.

So, for the top sub cell, EU −→ ∞ and EL = Eg1.
For the bottom sub cell, EU = Eg1 and EL = Eg2.
Biesbroek, et al., Climate change 2022: Impacts, adaptation and vulnerability.
Al-Asbahi, S.
Ghaithan, et al., "Effect of surface recombination velocity (srv) on the efficiency of silicon solar cell," Journal of Optoelectronics and Advanced Materials, vol. 22, no.