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So, for the top sub cell, EU −→ ∞ and EL = Eg1.
For the bottom sub cell, EU = Eg1 and EL = Eg2.
Biesbroek, et al., Climate change 2022: Impacts, adaptation and vulnerability.
Al-Asbahi, S.
Ghaithan, et al., "Effect of surface recombination velocity (srv) on the efficiency of silicon solar cell," Journal of Optoelectronics and Advanced Materials, vol. 22, no.

Hayat et al. [17] analyzed the influence of slip and heat transfer on the peristaltic transport.
El-Shehawey, N.
El-Dabe, I.
El-Hakeem, A.
El-Naby, I.

Demirboǧa and al; reported that silica fume, class C fly ash, and blast furnace slag as supplementary cementitious materials increase the thermal insulation of cement compared to the ordinary Portland cement proportionally with the rate of replacement [5].
Hamadache and al; proved that using perlite from Hammam Boughrara Tlemcen in binary mixtures with cement or ternary mixtures with cement and Pozzolan decreases the thermal conductivity to cement [6].
Table 6: Technical characteristics of natural sand of Oued el Kheir.
Properties Bulk density Finesse modulus Sand equivalent prohibited impurities Absorption Coefficient Organic matter pH Natural sand 2.70 1.48 84.26 None 1.53 0.59 9.53 Crushed sand 2.73 3.70 89.79 None 4.12 0.69 9.95 Table 7: Chemical composition of natural sand of Oued el Kheir.
El meski, M.Lahlaouti, lhassane, R.Djedjig, & A.El bouardi, Effect of the use of diatomite as partial replacement of sand on thermal and mechanical properties of mortars.

The model is parametrized with experimental results of different OATs and compared to the model proposed by Schirmaier et al. [1].
Membrane model by Schirmaier et al. [1].
The results for the membrane model by Schirmaier et al. [1] are also shown in the respective Figures 3, 4 and 5.
Fig. 4) show a good agreement of the new model with the results of Schirmaier el al.
The simulative strains in the 45°- OAT are closer to the experimental results compared to Schirmaier el al., but deviate slightly more from them for large displacements in the 30°-OAT for BC2.

Meanwhile, Bossert et al. [2] have shown that anonymity Anonymity is defined so that every generation is assigned same weight, such as “0” or “1”.
The extended utility function diverges to negative infinity as the probability approaches a certain level, referred to here as the “extreme line” (EL).
In this case, the EL could be given by .05.
Therefore, society would control the probability less than EL in the FDF.
Let the level corresponding to the SL be denoted by GS, and the level corresponding to the EL by GU.

El-Samak, D.
Adham, M.A.A Al-Maadeed and A.
El Gheriany, F.
Ahmad El Saqa, A.
Abd El Razek Amer and M.

McFadden, High strain rate superplasticity in a friction stir processed 7075 Al alloy, Scripta Mater. 42 (1999) 163-168
Ma, A.L.
Lee, Texture and weak grain size dependence in friction stir processed Mg–Al–Zn alloy55, Scripta Mater. 55(2006) 637-640
El-Rayes, E.A.
El-Danaf, The influence of multi-pass friction stir processing on the microstructural and mechanical properties of aluminum alloy 6082, J.

Sivakumar et al [1] machined AISI D3 steel using Taguchi L18 OA in WEDM.
Shanmuga prakash et al [5] reviewed the machining of tool and die steel in WEDM.
El-Taweel et al [3] investigated the effects of machining parameters of wire electric discharge machining of inconel 601 using responsive surface methodology.
Kanlayasiri et al [6] investigated the wedm machining parameters for better surface finish in DC53 die steel effectively.
Ko-Ta Chiang et al [7], done an analysis on SG cast iron getting better surface roughness using RSM while machining in EDM.

El Naschie that the nanoage is something of a Hemingway line of demarcation between the have and the have nots [1].
The ultrasonic vibration can greatly reduce the viscosity of the solution, making the impossible possible, see articles by Wan et al. [7] and Si et al. [8].
In this issue, a modification of the bubble electrospinning is suggested by Dou et al. [11].
Yang, et al., Vibration and Heat Effects on Electrospinning Modeling
Wen, et al., Multi-bubble Electrospinning of Nanofibers

El-Harrad et al. confirmed that there are two ranges of the Ba concentration, x < 0.1 and x > 0.1 and the best dielectric properties occurs in ceramics with x = 0.1 [14], but Rujijanagul and Bongkarn have observed a different results [11].
El-Harrad, P.