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Abd El-Ati2, S.
References [1] S.El-ATAR: M.
[2] Murakaini et al.: J.
El-Helbawy: Ph.D.
[9] El-Shora et al.: J.

El-Shekeil1,a, S.M.
[15] El-Shekeil YA, Sapuan SM, Khalina A, Zainudin E, Al-Shuja’a O, Journal of Thermal Analysis and Calorimetry, 109 (2012) 1435-43
Al-Shuja’a, Bulletin of Material Science, (2012)
[17] Sapuan S, Pua F-l, El-Shekeil Y, AL-Oqla FM, Materials & Design, (2013)
El-Shekeil SMS, A.

Kadim1,a* 1Biomedical Engineering Department, College of Engineering, University of Warith Al- Anbiyaa, Iraq aakeel_a86@yahoo.com *Corresponding author Keywords: ZnSe, TPD, PPV, PEDOT, QDs-LEDs, Organic Polymer Abstract.
The electroluminescence's (EL) hybrid devices were demonstrated by room temperature PL and electroluminescence (EL).
The EL spectrum reveals a broad emission band covering the range from 350 - 700 nm.
Fig. 5: I-V forward characteristics of hybrid EL devices.
Fig. 6: Electroluminescence of hybrid EL devices.

Microstructure and mechanical characterization of an Al-Zn-Mg alloy after various heat treatments and room temperature deformation This paper is dedicated to Prof.
A lot of effort has been spent on investigation of the precipitation process in Al-Zn-Mg alloys [1-4].
Hardness and electrical conductivity of undeformed specimens during aging at 130°C, 160°C, 190°C and 200°C after solution treatment at 490°C -2h (a) and on the as-cast alloy (b). 0,01 0,1 1 10 100 1000 10000 100000 0 10 20 30 40 50 60 70 80 90 100 110 120 HRF 130°C HRF 160°C HRF 190°C HRF 220°C Time [sec] HRF a 0,01 0,1 1 10 100 1000 10000 100000 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 El.Cond. 130°C El.Cond. 160°C El.Cond. 190°C El.Cond. 220°C Electrical Conductivity [MS/m] 0,01 0,1 1 10 100 1000 10000 1000001000000 0 10 20 30 40 50 60 70 80 90 100 110 120 HRF 100°C HRF 130°C HRF 160°C HRF 190°C HRF 220°C Time [sec] Electrical Conductivity [MS/m] HRF 0,01 0,1 1 10 100 1000 10000 1000001000000 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 El.Cond. 100°C El.Cond. 130°C El.Cond. 160°C El.Cond. 190°C El.Cond. 220°C bThe tensile tests curves obtained at room temperature on the as-cast
Hansen et al.: Acta Mater Vol. 49 (2001), p. 3493 [6] J.C.
Naiyu et al : Mater.

El-Raghy, Vol 31A (2000) 1857-1865
El-Raghy.
El-Raghy, Metall.
El-Raghy and M.
El-Raghy, J.M.

El-Shazly1,b, M.F.
El-Kady1,3,c, Hesham I.
El-Shazly, M.F.
El-Shazly, M.F.
El-Shazly, M.F.

Introduction Hilbert-Huang Transform (HHT) is a novel method developed by Prof Huang et al to perform nonstationary signal processing [1].
Huang et al applied HHT to the earthquake record from station TCU129, at Chi-Chi, Taiwan, collected during the 21 September 1999 earthquake [2].
Yang et al applied HHT to a benchmark problem established by the ASCE Task Group on Structural Health Monitoring [4].
It is obvious that under the effect of the El Centro wave, cracking or yielding of the structure concentrates in just 1~2 seconds.
Journal of Disaster Prevention and Mitigation Engineering(Chinese), 2007, 27 (3): 318-322 [7] Li Shujin, et al (2007).

The electroluminescence (EL) spectrum was recorded by Cary 5000 UV-Vis-NIR spectrometer.
(b) Normalized absorption and PL spectra of 2,7-di(9-carbazolyl)-9-(2-ethylhexyl)carbazole, and EL spectrum of the obtained OLED structure.
Electrical parameters of the obtained ZnO, ZnO:Al and ZnMgO:Al films.
The electroluminescence (EL) spectrum of the OLED structure exhibits the UV and violet electroluminescence.
The difference in PL and EL spectra can be explained by increasing of interactions of intermolecular excited state in the organic film under the electrical excitation.

In 1987,Tang et al. reported a stacked EL cell structure, which has a luminescent efficiency of 1.5 lm/W and a luminance of 1000 cd/m2 for green light under lower operating voltage than 10V [1].
In this paper, we present a series of Electroluminescence (EL) devices with organe emission that can be varied with different excton-blcking layer.
EL properties of the devices with different thickness excton-blocking layer, especially the EL spectra of the devices have been studied.
As shown in Fig.2 (a), the devices have the same emission EL spectra with the different thickness of the excton-blocking layer, The normalized EL spectra of the devices shows two main emission peaks at 446 nm and 572 nm originating from DPVBi and DCJTB, respectively.
The key EL characteristics of devices are shown in Table 1.

Cherkaoui El Moursli3,c , T.
El Khoukhi4,d, B.
The basis set of P is optimized in the atomic state and is valid for ionic systems as indicated by Saunders et al. [7].
References [1] Berrada, M., Choukri, A., El Khoukhi, T., 1989.
Catti et al., J.