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longitudinal tangential radial Earlywood Latewood Resin Canal Ray a B w1 w L R F 2H Fig. 1 Principle structure of softwood (Poulsen et al. 1997) Fig. 2.
EL and ER are elasticity modulus of orthotropic principal axis.
(1) By keeping EL=16.27GPa, ER=11.03GPa, GLR=1.17GPa, VLR=0.49 and α2=S/Y=9.25/45 fixed, we select strength ratio α1 at 2.0, 2.5, 3.0, 3.5 and 4.0, respectively.
(2) By keeping EL=16.27GPa, ER=11.03GPa, GLR=1.17GPa, VLR=0.49 and α1=X/Y=100/45 fixed, we select strength ratio α2 at 0.1, 0.15, 0.2, 0.25 and 0.3, respectively.
(3) Now we investigate the effect of different toughness ratio r1=EL/ER, r2=ER/GLR on plastic zone.

[3] Langer, Michal, et al.
[11] Al-Omran, Abdulrasoul, et al.
[13] Yang, Zhi, et al.
[15] Du, Fengyi, et al.
[16] Wang, Chuanxi, et al.

Gardea-Torresdey1,2e* 1Chemistry Department, The University of Texas at El Paso; 500 West Univ.
Ave., El Paso, TX 79968, USA 2Environmental Science and Engineering PhD program, The University of Texas at El Paso, 500 West Univ.
Chemical speciation of Zn in soils was determined by SEP suggested by Tessier et al. (1979) and modified by Tan et al. with slight modifications [26].
Al-Salama, K.
In: Page, A.L.

The first Rossendorf paper on this subject was reported by Klabes et al. [4] on the FLA of As-implanted silicon.
Basic estimations of the FLA processing on such ITO-on-glass or polyethylene terephthalate (PET) were already discussed by Gebel et al. [8].
This emitter was the worldwide first Si-based UV emitter which showed electroluminescence (EL) at 316 nm.
An increase of both the annealing temperature and time leads to a decrease of the UV EL intensity.
The sample annealed at 1100 °C for 20 ms (FLA) exhibits a 4 times higher UV EL than the sample treated at RTA.

Liu, et al.: J.
Chen et al.: J.
Al Kalfioui et al.: J.
El-Yadouni, A.
Li et al.: J.

In order to avoid the segregation problem during melting of MgCl2·6H2O, El-Sebaii et al. [7] suggested to use the extra water principle.
El-Sebaii, S.
Al-Amir, F.M.
Al-Marzouki, A.S.
Al-Ghamdi, S.

Microstructural Evolution and Mechanical Properties during Homogenization and ageing Treatment of Al-Mg-Si Alloy Wire Cold Drawn M.
Farh2,3 1Laboratoire de Génie Energétique et Matériaux, Université de Biskra, Biskra, Algérie 2Laboratoire des composants actif et matériaux, Université Oum el Bouaghi, Algérie 3Département de sciences de la matière, Université de Tebessa, Algérie Keywords: alloys Al-Mg-Si, Precipitation, Heat Treatment, during ageing, homogenization treatment Abstract.
We focus in this work on Al-Mg-Si alloys (6000 series), which have interesting mechanical properties.
The most recent research on Al-Mg-Si alloys focused on the two parameters, natural aging and holding time [1-3].
Aging parameters and composition variations affect considerably the formability of Al–Mg–Si alloys [5, 6].

Al-Martini, and M.
Al-Martini, and J.
Al-Martini, and M.
Al Martini, and M.
Al Khatib, and S.

According to the theory of Helmholtz on electric double layer and the theory on extended electric double layer developed by Stern et al[7],as the difference between the adsorption coefficient of positive and negative ions existing in oil, the solid surface would be charged because of the adsorption of charges with opposite polarity in oil or the ionization of weak chemical bonds on the solid surface due to the action of solvent.
Gavis et al J.
Brozostek et al from British thought that, the polarity of charges depended on the ageing degree of oil.
As the oil flowing through the solid insulation of the winding, it would be electrified.
Therefore, if the solid material was not changed, then the electric polarity of charges in oil would not change too.

El-Friakh1,2c, V.
Lazar1h 1,2,3) Université de Lyon, CNRS, France 1) Laboratoire AMPERE, INSA Lyon, Ecole Centrale de Lyon, 69621 Villeurbanne 2) Institut des Nanotechnologies de Lyon, Ecole Centrale de Lyon, 69134 Ecully 3) Laboratoire des Multimatériaux et Interfaces, Université Lyon 1, 69622 Villeurbanne ajulien.pezard@ec-lyon.fr, bjeremy.lhuillier@ecl2015.ec-lyon.fr, czakarya.el-friakh@ecl2015.ec-lyon.fr, dveronique.souliere@univ-lyon1.fr, ebertrand.vilquin@ec-lyon.fr, fpedro.rojo-romeo@ec-lyon.fr, gmihai.lazar@insa-lyon.fr Keywords: Graphene, Silicon Carbide, electron-beam sublimation, Tera Hertz Transistor Abstract.
Firstly, and following Jernigan & al.’s work [4], a study was lead to compare the synthesis of graphene on 4H-SiC epilayers, under argon overpressure or Ultra High Vacuum (UHV).