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Fig.1 Photo of seismic damage of museum cultural relics Many scholars have carried out studies on oscillation responses of free-standing objects under earthquakes.Zhang et al.[5-6] studied response of indoor free-standing equipment under the action of a foundation seesawing during an earthquake.They pointed out that the response included 3 types:periodic, quasi-periodic and chaotic,all of which were sensitive to the initial conditions.
Guo et al.[7] studied initial conditions for occurrence of oscillation and critical conditions for falling down of free-standing equipment under seismic excitation by theoretical analysis.
PGA=0.14g PGA=0.28g PGA=0.56g Fig.4 Acceleration curves of point 2 under white noise excitations PGA=0.14g PGA=0.28g PGA=0.56g Fig.5 Frequency distributions of showcase El-centro wave Taft wave Artificial wave Fig.6 Frequency distributions of earthquake waves (PGA=0.1g) Acceleration Response.
Table 2 Peak displacement values of relic (Unit:mm) PGA/g 0.1 0.2 0.4 El-centro 10.77 15.04 62.79 Taft 11.41 22.54 63.15 Artificial 20.08 38.18 61.25 Dynamic Magnification Factor.
By definition dynamic magnification factor for showcase is β1=a2/a1,for relic β2=a3/a1.Here a1,a2 and a3 represent peak acceleration values of showcase bottom,showcase top, and relic.Based on test data, β1 and β2 curves for different cases are plotted in Fig.9,where E represents El-centro wave,T represents Taft wave,and A represents Artificial wave.

El-Labban1,b, A.K.
Al-Oufy2,3,c, and M.A.
Kamel et al. [9] found that 3wt.% of graphene additions to calcium grease reduced the friction coefficient and the wear scar diameter by 61% and 45%, respectively.
Also, there was an attempt to apply graphene in the lubrication of rolling element bearings conducted by Pape et al. [10].
El Sherbiny, K.A.

Bright linear features are observed along <110> directions in electroluminescence (EL) images.
Experimental Almost thirty of the 3C-SiC pn diodes from the same wafer reported in [1] were investigated by room-temperature EL.
To determine whether or not these features exhibited any motion during electrical stressing, four 1-second-long EL images were recorded at 1, 10, 100, and 1000 A/cm 2; these so-called "pre-stress" images were used as initial-state references with which to compare the post-stress EL images.
(A) Pre- and (B) post-stress (see text for details) EL images taken at a current injection of 10 A/cm2.
There is negligible difference between pre- and post-stress EL images. explicit contrast to bipolar degradation commonly observed in bipolar 4H-SiC devices.

Al Hussaini, M.
Al-Hussaini, N.
Al Hussaini, M.
El-Ghamaz, A.
El-Ghamaz, M.

El-Bakkari, A.
El Moussaouy, M.
El Moussaouy, L.
El Hadi, M.
El Hadi, A.

Cutting Model in Machining of Al/SiCp Metal Matrix Composite S.
Ozben et al [1] studied the machinability of Al/SiC-p in turning operation which was produced by casting method by adding 5, 10 and 15 wt% of SiC-p.
El-Gallab, M.
El-Gallab, M., Sklad, “Machining of Al/SiC particulate metal-matrix composites.
El-Gallab, M.

As well as the abstracts, the issue includes original papers on the topics of “Identification of Mg Vacancy in MgO by Positron Lifetime Measurements and First-Principles Calculations” (M.Mizuno et al.), “Analysis of the Effect of the Oxide Ion Vacancy on the Crystal Structure of La1-xCaxCrO3-?
by High-Temperature X-Ray Diffraction under Various Oxygen Partial Pressures” (N.Ohba et al.), “Synthesis and Characterization of Lithium Ion Conductors, Li3InBr6 and their Substituted Compounds” (Y.Tomita et al.), “Oxygen Diffusion in La2-xSrxCuO4-?
: Molecular Dynamics Study” (S.N.Savvin et al.), “Stress-Induced Diffusion and Cation Defect Chemistry Studies of Perovskites” (K.Salama et al.), “Transport and Electrochemical Properties of LiyNixMn2-xO4 Cathode Materials” (J.Molenda et al.), “Static and Dynamic Heterogeneities in Supercooled SiO2” (Vo Van Hoang), “Charge Distribution and Magnetic Interactions in PrBa2Cu3O7 with Substitutional Defects and Oxygen Disorder: the ab initio Approach” (M.?
uszczek), “Grain Boundary Defects in ZnO Ceramic Doped with Mo” (M.El-Hofy), “Elucidation of Ionic Conduction in Oxide Electrolytes by AC Method (Dielectric Relaxation Processes in La1-xSrxGa1-x+0.1Tix-0.1O3-?)”
(E.Iguchi et al.), “Diffusion of Oxygen at Ceramic Interfaces for High-Temperature Solid Oxide Fuel Cells” (T.Horita et al.), “Structural Defect Formation in Inorganic Sol-Gel Derived Oxides” (E.V.Frolova and M.I.Ivanoskaya), “High Oxide Ion Conductivity of (Ba1-x-ySrxLay)InO2.5+y/2 Members Derived from the Ba2In2O5 System” (K.Kakinuma et al.), “Germanium in Czochralski Silicon” (D.Yang and J.Chen), “Cation Transport in Stabilised Zirconias” (M.Kilo), “Probing the Effects of SHI and Doping-Induced Defects in Nanocrystalline Spinel Ferrites” (S.Ghosh et al.) and “Size Effect on the Electronic Properties of Doped and Undoped Ceria” (X.D.Zhou et al.).

Gordon and El Bassayouni [12] studied grain growth in bulk samples of zone refined Al with Fe contents of 0.05 atomic ppm.
Assuming that all the Fe atoms reside at the boundaries, the iron content of the boundaries for Gordon and El Bassayouni’s bulk Al samples and for the stagnant structure of the 100 nm-thick Al film can be calculated.
The total number of Fe atoms in the 100 nm-thick Al film is calculated as 8.73 × 1016 cm-3 and that for the bulk Al sample of Gordon and El Bassayouni is calculated as 3.01 × 1015 cm-3.
Thus, the grain boundary surface atom fraction of Fe in the stagnant structure of the 100 nm-thick Al sample is more than 40 times lower than for bulk Al samples of Gordon and El Bassayouni.
El Bassayouni, Transactions of the Metallurgical Society of AIME, Vol. 233 (1965) p. 391.

It also showed potential effects in refining the α-Al phase [[] W.
El-Hadad, Light Metals 2016, 821-825. ].
El-Aziz, M.
El-Hady, W.
El-Hadad, Y.

And it is found in abundance in eastern Algeria, especially Ain Mlila-Wilaya of Oum El Bouaghi-Algeria.
The constituents of these carbonates are Ca, Mg, C, O, Al, Si, Fe, Ba, F, and Sr, analysis by XRD, and Raman, show that in addition to CaMg(CO3)2, we may have calcium carbonate.
This mineral is extracted from the region of Djebel Taioualet, Ain Mlila-Wilaya of Oum el Bouaghi-Algeria ), and operated by The Algerian society of Aggregates S.P.A.
We can also confirm the presence of the elements: Ca, Mg, C, O, Al, Si, Ba, Fe, F, and Sr.
Al.