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Tc = 584 0C, YS = 280MPa, TS = 360MPa, El = 32% 2.
Tc = 6400C, YS = 260MPa, TS = 325MPa, El = 39% The microstructure of steel at low and high Tc is characterized by an equal axis ferrite grain with the sizes of (20-30) µm.
Chemical composition of IF steel are as follows (ppm): 1) - C-6, Si-22, Mn-100, S-8б, P-11, Cr-40, Ni-20, Cu-20, Al-36, N-6 and Ti-57 or describe in atom%: C2 Si3 Mn7 S P Cr3 Ni Cu Al5 N2 Ti5 Fe7121 2) - C-8, Si-13, Mn-140, S-90, P-17, Cr-50, Ni-20, Cu-30, Al-42, N-4 and Ti-94 or describe in atom%: C3 Si2 Mn10 S P2 Cr4 Ni Cu2 Al6 N i8 Fe 7121.
The ratios of Mn/S, Al/Si and Si/C are different between steels 1 and 2: 2.3 and 5.0, 1.7 and 3.0, 1.5 and 0.67 respectively.
Production condition and mechanical properties are as follows: steel 1 - hot rolling (TFR = 9000C, Tc = 690 0C), cold rolling (ε = 65 and 75%) on the thickness 1mm, annealing in the bell-type furnace at 7300C, YS = 160 MPa, TS = 310 MPa, El = 45%, Er. 11.5 mm; steel 2 - hot rolling (TFR = 9000C, Tc = 6900C), cold rolling (ε =70, 75, 80, 84 %) on the thickness 0.8mm, annealing (bell-type furnace) at 730 0C, YS = 160 MPa, TS = 310 MPa, El = 41.5%, Er.10.8mm.

Mustafi et al. [7] found that soda lime silicate can modification behaviour and porcelain stoneware tile.
In another study, El-Shimy et al. [8] found that soda lime silicate can reduce energy consumption and CO2 emission .
These result reflect those of El-Shimy et al. [8] who found that, more glassy phase will accompanied with dilation of closed pores and expansion due to entrapment of release gases mainly CO2 which turn increase water absorption in Figure 2(b).
El-Shimy, S.K.
El-Sherbiny, M.F.

In this study, two MR dampers were used to control a five-story structure subjected to the El Centro earthquake at three different magnitudes: full-scale, half-scale, and quarter-scale.
A six-story test structure equipped with four MR dampers was subjected to sinusoidal excitation near the first two modes of the structure in Yi et al. (1998) and to scaled versions (55, 105, and 125%) of the El Centro earthquake in Yi et al. (2001.)
This structure was subjected to the following four earthquakes: El-Centro, Hachinohe, Kobe, and Northridge.
[4] Mei G, et al.
[6] Ulicny J, Balogh M, Potter N, et al.

Many scholars abroad researched on the fatigue of the girders with corrugated webs and had carried on the beneficial achievement[1]:studies on the behaviour of corrugated steel decks by Bryan and El-Dakhakhni [2] and corrugated light-gauge partitions by El-Dakhakhni [3] were reported.
Studies were conducted in Britain by Harrison [11], in Hungary by Korashy and Varga [12], in Sweden by Bergfelt and Liva-Aravena [13], and in Germany by Lindner and Aschinger [14] and Scheer et al. [15].
References [1] Sherif A.Ibrahim, Wael W.El-Dakhakhni,Mohamed Elgaaly: Behavior of bridge girders with corrugated webs under monotonic and cyclic loading.
Engineering Structures 28(2006)1941-1955 [2] El-Dakhakhni WM.

Famous deposits of blue amber are located along the Atlantic coast of Central America, the largest of which is exploited at the El Cacao Mine, Dominican Republic [1].
Another well-studied deposit containing both common and blue amber varieties of Albian age was described at the El Soplao site, northern Spain [3-4].
Menor-Salvan et al., Terpenoids in extracts of Lower Cretaceous ambers from the Basque-Cantabrian Basin (El Soplao, Cantabria, Spain): Paleochemotaxonomic aspects.
Gomez. nusual concentration of Early Albian arthropod-bearing amber in the Basque-Cantabrian Basin (El Soplao, Cantabria, Northern Spain): Palaeoenvironmental and palaeobiological implications.

Effect of SiC Particles Volume Fraction on the Mutual Diffusion of Al and Cu During Fabrication of Al-4.5wt%Cu/SiC via Mechanical Alloying E.
Unfortunately, the traditional technique of liquid metallurgy for the synthesizing of SiC/Al (or Al alloy) composites, which is accompanied by high temperature and liquid phases, cannot be applied because of the following reasons [6,7]: (a) The extreme difference in the thermal expansion coefficients between SiC and Al (Al alloys) (b) The poor wettability between molten Al (Al alloys) and SiC (c) Chemical reactions which are taken place at the SiC-Al interface Eq. (1) and Eq. (2) show the chemical reactions which take place at the temperature 923-1272K [6-10].
Sample Al-4.5wt%Cu [15] Al-4.5wt%Cu/4vol.
%SiC Al-4.5wt%Cu/8vol.
[7] M.Sherif El-Eskandarany: Mechanical Alloying for Fabrication of Advanced Engineering Materials, Noyes Publications/William Andrew Publising, Norwich, NY (2001)

El Cairo.
El Cairo.
El Cairo.
El Cairo.
Maderas Determinación de la resistencia al cizallamiento paralelo al grano NTC775.

Methodology 2.1 Materials: RS was obtained from a farm in New Borg El-Arab, Alexandria, Egypt.
Rathour et al., “Recent Trends, Opportunities and Challenges in Sustainable Management of Rice Straw Waste Biomass for Green Biorefinery,” Energies, vol. 16, no. 3.
El.
Abd El-Moneim, “Layer-by-Layer Inkjet-Printed Manganese Oxide Nanosheets on Graphene for High-Performance Flexible Supercapacitors,” ACS Applied Materials & Interfaces, vol. 16, no. 46, pp. 53632-53643, Nov. 2023
Jiang et al., “Rice straw-derived activated carbon/nickel cobalt sulfide composite for high performance asymmetric supercapacitor,” Diam Relat Mater, vol. 139, Nov. 2023

Voros et al. [8, 9] simplified the El-Halwagi’s representation by reducing the distribution boxes to junctions.
Maskan and Wiley et al. [10] used a directed graph and connectivity matrix to represent the RO networks superstructure.
El-Zanati, S.
El-Halwagi: AICHE J.
El-Halwagi: Journal of membrane science.

The layout design of bracing members for a two-bay six-story steel frame under different requirements has been discussed by Mijar et al [1] using a continuum topology optimization approach based on classical Voigt-Reuss mixing rules.
Liang et al [2] proposed a performance-based optimization method formulated on the basis of system performance criteria for the topology design of bracing systems for multistory steel building frameworks under multiple lateral load cases.
To solve this problem, a concept of mean thickness for a design domain has been advanced by Huang et al [3] in the research on the optimal topology design of multistory steel frame bracing systems with stress and multi-displacement constraints under multiple lateral loading conditions.
The maximum inter-story drift of the optimal unbraced steel frame to the modified El Centro ground motion is 19.3mm, which also exceeds the allowable value 14.4mm (h/250, where h is the story height of the frame).
Fig. 5 presents the maximum inter-story drift response history of the optimized braced steel frame to the modified El Centro ground acceleration, and the maximal value is 12.6mm (<14.4mm) occurred at time 2.32s.