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The nonlinear earthquake responses of the structures are calculated by using program IDARC2D Version 7.0(Reinhorn et al.,2010)[7-8].
The maximum displacement, interstorey drift, story shear, and acceleration responses of the structures subjected to El-Centro, Taft , San Fernando and Kobe waves are shown in Fig.3~Fig.5.
to El-Centro, Taft , San Fernando and Kobe waves with LYP100 and 4mm(a)Displacement(b)Interstorey Drift(%) (c)Story Shear (d) Acceleration (a) (b) (c) (d) Fig. 6 Hysteretic curves of the low yield strength steel panels numbered 121 subjected to waves (a) El-Centro (b) Taft (c) San Fernando (d) Kobe The computing results are analyzed as follows: （1）Fig. 3(a) ~ Fig. 3 (d) show that the maximum displacement and interstorey drift angles decrease while the maximum interstorey shear force and acceleration responses increase along with increasing of the thickness of the built-in low yield strength steel panels.
（2）From Fig. 4(a) ~ Fig. 4 (d) it can also been seen that the maximum displacement, interstorey drift, story shear force and acceleration responses of the RC frame multi-ribbed composite walls structure subjected to El-Centro wave using LYP100 are the smallest, which reflects that the ultra low yield strength steel panels(less than 100MPa) have obvious advantage of seismic performance
References [1] Manoru Ohashi,Haruo Mochizuki,Tanemi Amaguchi,et al.Development of new steel plates for building structural use.

[2] Pan Wenxia, Fu Zhongxing, Wang Pengfei, el al.
Tanikawa, el al.
[4] Yan Gangui, Xie Guoqiang, Li Junhui, el al.
[7] Yang Shuili, Li Jianlin, Hui Dong, el al.
[8] Feng Jiangxia, Liang Jun, Zhang Feng, el al.

As well as the 452 metals abstracts, the issue includes – in line with the new editorial policy of including original papers on all of the major material groups: “Defect Investigation of Plastically Deformed Al 5454 Wrought Alloy Using PADBS and Electrical Measurements” (Abdel-Rahman, Kamel, Lotfy, Badawi and Abdel-Rahman), “Activation Enthalpy of Dislocation Migration in Aircraft (Aerospace) (2024) Alloy by Positron Spectroscopy” (Abdel-Rahman, Abdallah, Hassan and Badawi), “Effect of Irradiation Dose on AlCu6.5 Alloy using Positron Annihilation Doppler Broadening Technique” (Abdel-Rahman, Lotfy, Abdel-Rahman and Badawi), “Dependence of Mono-Vacancy Formation Energy on the Parameter of Ashcroft's Potential” (Ghorai), “X-Ray Characterization of Ag Impurities in Na1-xAgxCl” (Hazeen, Syed Ali, Prema Rani and Saravanan), “Self-Organization Behavior of Sub-Micron CdO Grains Grown during Vapour-Solid Transition” (Zhang, Wang and Li), “Studies of the Local Structure and the Spin Hamiltonian Parameters
“The Effect of Defect Disorder on the Electronic Structure of Rutile TiO2-x” (Hossain, Murch, Sheppard and Nowotny), “Grain-Boundary-Defects-Induced Switching in Zn-Bi-Mo Ceramic” (El-Hofy), “Synthesis and Characterization of ZrW2O7(OH1-x,Clx)2▪2H2O (x = 0.016, 0.025)” (Cao, Deng, Ma, Wang and Zhao), “Modelling of the Gettering by Mechanical Damage of Metallic Impurities in Silicon” (Ayad and Remram), “Deep Trap Concentrations from Three-Dimensional Carrier Concentration Profiles in Hydride Vapor Pressure Epitaxially-Grown GaN” (Halder, Martin and Sisler), “Slow Positron Studies of Defects in Si-Doped GaAs” (Godbole, Badera, Shrivastava and Joshi), “Six-Jump-Cycle Mechanism for Collective Correlations in Nonstoichiometric Intermetallic Compounds” (Gosain, Chaturvedi, Belova and Murch), “Vacancy-Wind Factors and Collective Correlation Factors in Nonstoichiometric B2 Intermetallic Compounds” (Gosain, Chaturvedi, Belova and Murch), “Defect Densities using the Positron Annihilation Doppler
Broadening Technique in Wrought Alloys 3003 and 3005” (Abdel-Rahman, Kamel, Abo-Elsoud, Lotfy and Badawi), “Phenomenological Model for Creep Behaviour in Cu-8.5at%Al Alloy” (Abo-Elsoud), “Surface Microstructural Evolution up to Creep Rupture under the Power-Law Regime in Cu-8.5at%Al Alloy at Intermediate Temperatures” (Abo-Elsoud), “Effect of γ-Irradiation on the Mechanical Properties of Al-Cu Alloy” (Abo-Elsoud and Ismail), “On the Physics of the Anomalous Characteristics of Fickian Diffusion of Fe and Other Transition-Element Impurities in Crystalline Al at Elevated Temperatures” (Nechaev), “On the Physics of Enhanced Fickian Diffusion and Structural-Phase Changes in Intensively Deforming Metallic Materials” (Nechaev).

Alaa Physics Department, Faculty of Science, El-Minia University, 61519 El-Minia, Egypt, email: hamdyfm@link.net & esamhady@link.net Keywords: Positron annihilation, free volume hole, polyvinyl chloride, conductivity, dielectric Abstract.
This is in good agreement with the data of Shekar et al. [5] for polyvinyl alcohol.
Abdel-Malik and his group (Physics Department, Faculty of Science, El-Minia University, Egypt) for their help in dielectric measurements.
El-Hanafy, and M.
El-Nimr, J.

Electroluminescence Imaging EL: When excited carriers recombine into a solar cell, it emits photons then accordingly EL imaging is obtained.
An EL effect happens then by means of an injected current that yields the excitation [9].
References [1] Jiang, L.L. et al.
Photoenergy, 2012. [12] Ancuta F. et al., “Fault analysis possibilities for PV panels“.
IEEE; 2016, p. 144–9. [17] Hu, Y. et al., 2013.

Pure white- and red-light electroluminescence from a single polymer has been obtained in a device with a configuration of ITO/PEDOT:PSS/polymer/Ca/Al.
Although high electroluminescence (EL) efficiencies have been achieved, this strategy suffers from intrinsic phase separation and bias-dependent EL spectra.
Electroluminescent properties The EL performance of the copolymers was examined in the device configuration of ITO/PEDT/polymer/Ca/Al.
The typical EL spectra of copolymer PFO-BTT from such device are shown in Fig. 3.
Table 3 Device performance of the copolymers with the device structures: ITO/PEDT/ polymer/Ba /Al Copolymers Device performance Chromaticity coordinates λPlmax /nm QPL /% λElmax /nm V mA cd m-2 cd/A Qext/% x y PFO-BTT0.01 421 73.3 424 5.6 4.2 81.4 0.29 0.50 0.34 0.34 PFO-BTT0.05 588 55.0 572 6.4 4.7 374 1.19 1.76 0.49 0.46 PFO-BTT5 597 72.2 598 15.5 4.9 663 2.03 2.2 0.61 0.39 PFO-BTT15 604 55.2 600 10.5 5.4 793 2.20 2.4 0.59 0.41 Fig. 3 EL spectra of copolymer PFO-BTT with ITO/PEDT/polymer/Ca/Al structure Copolymer PFO-BTT of all compositions emits red light.

Abd El-latif, A.
Al-Hazmi, Y.
El-Sayed, H.A.
El-Remaily, H.
Abd El-latif, A.

El-Shazly1,2,b and M.F.
Elkady1,3,c 1Chemicals and Petrochemicals Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria, Egypt. 2Chemicals and Petrochemicals Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria, Egypt. 3Fabrication Technology Department, Advanced Technology and New Materials and Research Institute (ATNMRI), City of Scientific Research and Technological Applications, Alexandria, Egypt.
El-Shazly, and M.
El-Kady, “Assessment of polypyrrole nanoparticles synthesized in presence and absence of surfactant for heavy metals decontamination,” in AIP Conference Proceedings, 2019
Cui et al., “Surface modification of neural recording electrodes with conducting polymer/biomolecule blends,” J.

[2] Zeid Abdullah Al-othaman, Synthesis, modification and application of mesoporous materials based on MCM-41, In: Ph D.
[5] El-Nahhal, Y.Z., Safi, J.M., Adsorption of phenanthrene on organoclays from distilled and saline water.
El-Ashgar, I.M.
El-Ashgar, I.M.
Warner, Thanapon Sangvanich, et. al., Removal of heavy metals from aqueous systems with thiol functionalized superparamagnetic nanoparticles, Environ.

Two sands of the area of El Ghadir (Skikda) were used for concrete specimens: a sea sand (S1) and a crushed sand (S2).
It has a clear gray color, made at the blast furnaces of El Hajar (Annaba).
Bouikni, and al: Durability Properties of Concrete Containing 50 % and 65 % Slag, Journal of Construction and Building Materials Vol. 23 (2009), p. 2836 [3] E.
Güneyisi and al: A study on Durability Properties of High-Performance Concretes Incorporating High Replacement Levels of Slag, Journal of Materials and Structures Vol. 41 (2008), p. 479 [4] H.M.
EL-Hosiny: Hydration and Pore Structure Characteristic of Superplasticized Hardened Slag Cement Pastes, Journal of Ceramics Vol. 46 (2002), p. 63 [8] G.