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The XPS spectra were collected using a Physical Electronics Model 1600 XPS system equipped with a monochromator and an Al K Alpha X-ray source (hν = 1486.8 eV) operating at 150W beam power. 3.
Acta.Vol.597 (2007),p. 6 [18] E.L.

Chen, et al presented a method to construct the Jacobian derivative matrix in the matrix form using special matrix product [10].
El-Gamel, A.I.

Noriman, et al. [7], has been reported that the incorporation of TOR in SBR/NBRr blends approximately enhanced tensile strength, tensile modulus and hardness but reduced the Eb and rebound resilience of SBR/NBRr blends.
El-Sabbagh and A.

Kalna, E.L.
Guang, A.L.

Hawkes, et al.: J.
El-Khaiary: Bioresour.

The compounds possess attractive optical properties due to their low-dimensionality semiconductor nature, for example, strong exciton absorption and sharp photoluminescence at room temperature sufficient to offer potential applications in electroluminescent (EL) devices.
Ishihara et al.[4,5] have established that the very large exciton binding energy and oscillator strength in these materials are too large to be explained by the structural two-dimensionality alone and require, for an adequate explanation, a dielectric confinement effect provided by the alternation of low dielectric constant organic and high dielectric constant lead (�) halide layers.

The literature [6] developed ANNs for establishing constitutive model for high strain-rate deformation of Al 7075-T6.
El-Mounayri and S.

As Herrera-Viedma et al[7] Proposed Fuzzy Preference Relation, people can obtain a weight value after making only n −1 pair wise comparisons brought a concept that every decision maker could choose a clear preference item for standard while pair wise comparison, and then compare with the adjacent items, so the evaluating process can be more flexible.
[11] n.s. el-tayeb, r.m. gadelrab, friction and wear properties of e-glass fiber reinforced epoxy composites under different sliding contact conditions, 1(1996) 112–117

., Verma D. and Peterson E.L., Maintainability: A Key to Effective Serviceability and Maintenance Management, John Wiley and Sons, Inc., New York, 1995
[8] Hao Qingbo, Yang Zhaojun, Chen Fei, et al., A fuzzy maintainability allocation method for NC machine tools based on interval analysis, IEEE Computer Society, 2011: 889-896.

El-khazali, M.
Al-Mutawalli.