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Samarth et al. [22] have studied the composition (x) dependence of the fundamental gap of ZnxCd1−xSe based on the reflection spectroscopy.
Electroluminescence (EL) Study 6.1.
Construction of EL cell, EL measurement setup for V-B & V-I characteristics, and for EL spectra measurement are shown in figures 6 (a), (b) and (c), respectively.
Similar results have been obtained by Tekchandani et al. [32] from mercaptoacetic acid capped CdSe nanocrystals, they have proposed that this nature of frequency dependence of EL brightness may be due to emptying and detrapping of EL centers more rapidly with increase in frequency. 6.4.
Al-Douri, The Pressure Effect of the Bulk Modulus Seen by the Charge Density in CdxCompounds, Materials Chemistry and Physics 78 (2003) 625-629

The electroluminescent (EL) spectra and CIE coordination of these devices were measured by the PR655 spectra scan spectrometer.
The molecular structure of the used organic material Results and Discussion The normalized EL spectra of four devices at 10 v is shown in Fig.2.
The normalized EL spectra is almost same and not variable at different voltage,therefore DPIHQZn has relatively color purity.
L–V characteristics of four devices Conclusions We have demonstrated a novel yellow emitting material DPIHZn using electroluminescence (EL) spectroscopy with the structure of ITO/ 2T-NATA(40 nm)/ NPB(10nm)/Alq:x﹪DPIHQZn(35nm) /Alq(35nm)/LiF(5nm)/Al ,(x=1,2,3,5)which indicates that the maximum luminance up to 3180cd/m2 at an applied voltage of 15V by adjusting the doping density of DPIHQZn.
Umar, Thin Solid Films 517, 4679,(2009) [5] Kido J ,Ohtaki C, Hongawa K, et al .

Dynamical study of a structure: The case of Al Hoceima’s earthquake / Morocco EL GHOULBZOURI Abdelouafi 1,a, EL ALAMI Zakaria 1, b , El HANNOUDI Sabrine1,c, EL YOUBI Mohamed Salaheddine1,d 1 National School of Applied Sciences of Al Hoceima, Civil engineering Dept., BP 03, Ajdir Al Hoceima, Morocco b e.abdelouafi@hotmail.fr , a elalami.gc@gmail.com ,c sabrina.elhnd@gmail.com, dmselyoubi@yahoo.fr Key words: Accelerogram – Displacement – Dynamic of structure – eigenmodes – Station – structure.
This article will analyze the behavior of a frame structure sized without seismic design, this frame will be exposed to accelerograms of Al Hoceima’s earthquake recorded in several Spanish stations, and then the maximum displacement will be evaluated.
In our case the excitation f (t) is represented by the accelerogram representing the Al Hoceima earthquake.
The dynamic analysis will be performed three times by varying the recording station of Al-Hoceima’s earthquake, and then results will be discussed.[4] Characteristics of the studied frame Geometrical characteristics and reinforcement of the frame.
The use of accelerographs installed in the stations of Malaga, Almeria and Granada and the software SAP2000 allows obtaining the graphs of accelerograms of Al Hoceima’s earthquake recorded in different Spanish stations. [6] The accelerogram represents the variation of the earthquake acceleration versus time.

Fig.2 Normalized EL spectra of device ITO/TPD/Bphen/Rubrene/Bphen/LiF/Al at various voltages.
However, the ratio of 402nm peak intensity to 480nm peak intensity increases as the bias voltage increases, which can also be observed in EL spectra for the device ITO/TPD/Bphen/Rubrene/Bphen/LiF/Al.
Obviously the new peak at 480nm in EL spectra of device ITO/TPD/Bphen/LiF/Al can only be explained by the exciplex emission at TPD/Bphen interface.
Fig. 4 Normalized EL spectra of device ITO/TPD/Bphen/LiF/Al at various driving voltages.
Shi et al.: Appl.

EL efficiency shows weak dependence on doping concentration and current density.
Furthermore, researchers from Cheng et al. have also synthesized and characterized a series of iridium(III) complexes with substituted 2-phenyldenzothiozoles as the cyclometalated ligands and showed that the electroluminescent (EL) efficiency and emissive colors of OLEDs based on these iridium (III) complexes could be finely tuned by suitable modification of the substituents on ligands[8].
LiF/Al were used as the electron transporting layer and the cathode, respectively.
Inset: current density- brightness-voltage curves of the optimized device EL Properties.
More importantly, EL efficiency shows weak dependence on doping concentration and current density.

A detailed description of the LED preparation has been given by Oehme et al. [7].
For more details see Oehme et al. [7] and Schwartz et al. [9].
It is assumed that GeSn and Ge form a type-I MQW structure as described by Chen et al. [13].
El Kurdi, P.
El Kurdi, P.

Dual-EL Model of Dual-load NPC VSR A.
Dual-EL model According to Kirchhoff's circuit theory in Fig.1 and Park transformation, an EL model is achieved
[2] Majid Mehrasa, Saeed Lesan, Arash Abedi,et al.
[3] Majid Mehrasa, Saeed Lesan, Arash Abedi,et al.
Al-Haddad and F.

Sayed Abd El-Rehim, E.F.E.
El-Sherbini.
El Shayeb, F.
Abd El Wahab, S.
Zein El Abedin.

Lee et al. [6] and Al-Assaf and El Kadi [7] used ANN to predict the fatigue life of the same composite material used in the training process of the ANN under different loading conditions.
In a later work, El Kadi and Al-Assaf [8] used different neural networks architectures to predict fatigue life.
In a more recent study, El Kadi et al. [12] used PC to predict the fatigue life in other composite materials not used in training.
El Kadi and Y.
El Kadi, I.M.

The structure of the devices used here is: ITO/PEDOT-PSS(40nm)/PVK(30nm)/PFO: PFCz2-NPYIrm5 (60nm)/PFN(20nm)/Ba(4nm)/Al(120nm).
Table 1, CIE coordinate of the light emission from PLED (at 12V) with the structure ITO/PEDOT/PVK/EL(emitting-layer)/PFN/Ba/Al CIE PFO only 0.1% 1% 3% 5% PFCz2-NPYIrm5 only X 0.21 0.25 0.34 0.43 0.50 0.57 Y 0.24 0.26 0.32 0.37 0.40 0.43 In order to illuminate the action of PFN in the device, we fabricated another device (without PFN) with the structure of ITO/PEDOT:PSS/PVK/EL/Ba/Al.
Fig. 3(a) compares the EL spectra of the devices with or without PFN layer.
Second, the length between anode (ITO) and cathode (Al) increased 20nm when the electron-injection (PFN) was added.
Fig. 4, EL spectra of the devices with PFN at defferent voltage Conclusions In summary, high-efficiency White-phosphorescence PLEDs were obtained by inserting a water /alcohol-soluble polyelectrolyte(PFN) as an electron injection layer between the EML and the Ba/Al cathode.