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Lee et al. are the first to introduce transportation considerations in scheduling with disruptions [1].
To gauge the performance of an on-line strategy A, the competitive ratio analysis (see Borodin and El-yaniv [12]) is often used.
El-yaniv, Online computation and competitive analysis, England: Cambridge University Press (1998)

Experimental The raw materials used in this study are element powder of Nb, Si, Ti, Cr, Al.
ARPN Journal of Engineering and Applied Sciences Volume 11, Issue 3, 2016, Pages 1745-1749 [31] Popovich, A.A., Razumov, N.G., Gyulikhandanov, E.L.
Advanced Materials Letters Volume 5, Issue 12, 2014, Pages 683-687 [33] Popovich, A.A., Razumov, N.G., Silin, A.O., Gulikhandanov, E.L., Anoshkin, I.V., Nasibulin, A.G., Kauppinen, E.I.

Winzer, Electrochemical noise analysis of the corrosion of high-purity Mg-Al alloys, Corros.
Abd El Rehim, M.M.
El-Masri, A.M.

El-Didamony, L.
Mukhambetov, A.L.
El Sayed, Influence of the preparative parameters on the microstructural, and some physical properties of hematite nanopowder, Mater.

Hasen et al. has found out that significant changes in soil pH are observed in the soil profile depth from 0-1.5 cm during the one-year long period there the pH of soil changes from ~3.0-3.5 to ~5.0-8.0.
El-Ramady, Ecotoxicology of rare earth elements: Ecotoxicology of rare earth elements within soil and plant environments, Faculty of Agriculture, Kafr EL-Sheikh University, 2010, pp 19-22

According to the works of P.Badel and al [7] the periodicity of the microstructure is presented by the periodicity of the covariance.
The Voigt model (1889) and the Reuss model (1929) are expressed by [16 and 17]: Reuss model (transverse model): Et=[Vf/Ef +Vm/Em ]-1 (14) The Voigt model (longitudinal model): El=Ef.Vf+Em.Vm (15) Shear Module and poisson’s ratio are calculated by the mixtures law as follow: υlt=υf.Vf+υm.Vm (16) Glt=[Vf/Gf +Vm/Gm ]-1 (17) Halpin and Tsai (1969) have proposed equations designed to achieve a simple synthetic formulation, this empirical law has to admit that a good approximation of the actual modules of a unidirectional composite material is given by: ü Young modulus El and poisson’s ratio υlt they are given by mixtures law ü Young modulus ET, GT and υTT they are given by the empirical formula: MMm=1+φh vf1-h vf

Friction stir welding of AA 7020-T6 aluminum alloys, 5 mm thick plate is an Al- Zn-Mg grade alloy of 7XXX series heat treatable of medium strength alloys and employed for welded engineering structural components.
This is apparently due to the presence of significant porosity and kissing bond type defect in the stirred zone of this joint, and that conforms to results of Cam G. et al. [3].
Kumar et al. [13] reported that the precipitates occur when the peak temperature exceeds 390 ˚C for AA 7020-T6 aluminum alloys.
Evangelista E: ‘TEM analysis of friction stir welded butt joint of Al-Si-Mg alloys’, Materials Chemistry and Physics 81, 2003
Bhanumurthy: ‘Friction stir welding of Al 6061 Alloy’, Asian J.

Lin et al. [7] also found that other rare earth ions (La, Y, and Ce) could inhibited the anatase-to-rutile phase transformation during the thermal treatment.
Sun et al. (1998) reported that when the particle size of TiO2 decreased from 30 to 10 nm, its photocatalytic activity for the degradation of phenol had increased by 45%.
Iwasaki et al. [11] and Choi et al. [12] also confirmed the retarding effect of increasing Co(III) ion doping on the photocatalytic activity of TiO2 under UV light irradiation.
[8] E.L.

Later, long term researches demonstrated that many systems were not as stable as it was first imagined, and metallic released ions like Ni, V, Cu, and Al among others, can exhibit certain toxicity to human cells.
[2] Jirka I, et al.
[3] Liu X, et al.
Jirka et al, On the role of Nb-related sites of an oxidized β-TiNb alloy surface in its interaction with osteoblast-like MG-63 cells, Mat.
El.

The existence of a mixed-phase WO3 film is a result of the complex thermal equilibrium that exists between the triclinic and monoclinic phases as discussed by Woodward et al. [3].
Similar observation have been reported by Patil et al.[4].
Cole, E.L.
Tracy, et al.: Solid State Ionics Vol. 147(2002), p. 129
Vijayaraghavan, et al: Langmuir Vol. 22(2006), p. 10490