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The hidden costs of quality had defined by Campanella [12]and had given “The bulk of failure costs are ‘hidden’ below the surface and are usually responsible for “sinking the ship. [12, P.7]” Because of the hidden cost of quality could be happening at any time, and some model was introduced to measure the risk loss from this area, for example, Chen and et al. [13] have shown out the hidden cost of the qualityof the combination of business ethics.
For examples, wu et al. had designed the dynamic fuzzy set for beauty firm to make decision [15], Chen and et al [16] had introduced fuzzy logic to set hypothesis of sequential hypotheses testing model and had given its application, and Chen [17].had developed the fuzzy sample sequential testing model and had shwn out its application.
Shin: ”The Effects of Deferred Compensation and Performance-based Compensation on Firm Value”, Asia-Pacific Journal of Accounting & Economics 16(1) (2009), Pp.49-68 [12] J.Campanella:Principles of Quality Costs (ASQ quality Press:Wisconsin1999); [13] Heng-ShengChen,et al: “Business Ethics and Hidden Costs of Quality – A Case of Computer User and Supplier”, ICIC Express Letter(ICIC-EL), Reference No.
ICICIC2010-P.377; [14] Shu-Cheng Fang and Ting-Fo Wang:Fuzzy Mathematics and Fuzzy Optimums (Science Technique Publishing House, Beijing 1997); [15] Pei-LingWu, Ming-Chieh Wu, and etc.: “Dynamic Fuzzy Set in Design and Its Application-Auxiliary Cost of Hair Beauty”, The Business Review, Cambridge, VoL.14, No.2, Summer 2010, Pp.195-208; [16] Heng-Sheng Chen, and et al.

Ebrahim2,b 1Professor, Mechanical Engineering Department, Faculty of Engineering, Modern University for Technology and Information (MTI), El-Mokatam, Cairo 11571, Egypt 1Professor, Precision Engineering Division, National Institute for Standards (NIS), Giza (12211-136), Egypt 2Assist Prof., Architecture Engineering Department, Faculty of Engineering, Modern University for Technology and Information (MTI), El-Mokatam, Cairo 11571, Egypt aSalahAli20@yahoo.com, bGehanElsayed2@yahoo.com *Corresponding author Keywords: Nanotechnology, Coordinate technology, 3D printing, Eco-nano-buildings Abstract.
Ali; et al, Carbon-nanotubes Reinforced Polymers for Medical Applications: Improvement Impact strength of Polymer-Polymer Composites, under publishing, 2021 [5] Salah H.R.
[7] Lee, E., et al., “Thermal and day lighting performance of an automated venetian blind and lighting system in a full-scale private office, Energy and Buildings” Vol. 29 (1998), pp. 47

Moulin et al. [3] report that conventional lightweight cementing systems develop low compressive resistance, high porosity and permeability, and such characteristics limit its application.
El-Hassan and Abdelrahman [6] indicate that the granular materials optimization not only benefit the performance of the fluid properties but also improve mechanical properties of the set cement.
According to Iverson et al. [7], due to the position of the cement slurry between the casing and the formation, the understanding of its mechanical behavior is crucial to know the slurry cement behavior interaction throughout the lifespan of the well.
El-Hassan, M.

First generation copper metallodendrimers have also found application in catalysis as proven by Mugo et al. [17].
The λmax of isoniazid was confirmed to be 263 nm in pH 7 phosphate buffer as shown by Arifa Begum et al [24].
M. el-Brashy and S.
M. el-Ashry, “Colorimetric and titrimetric assay of isoniazid.,” J.

The Development of Mathematical Model for the Prediction of Ageing Behaviour for Al-Cu-Mg/Bagasse Ash Particulate Composites, Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No.10, pp. 907 – 917, 2010
El-Wakil, Alain Dufresne.
[25] Zizumbo A., Claverie A.L., Medina E.L., Hernandez E.G., Madrigal D., Zitzumbo R.

[6] Doo Kie Kim, Jong Jae Lee, Jong Han Lee et.al: Journal of Materials in Civil Engineering Vol. 3(2005) , p. 353-363
[12] Lei Chen, Ruting Wei, Taoju Teng et. al.: Guangdong Building Materials Vol. 1(2004), p. 32-35,in Chinese
[14] Sherif El-Gamai, Ehab El-Salakawy and Brahim Benmokane: ACI Structural Journal Vol. 9(2005), p. 727-735

[11] Tawansi A, El-KhodaryA, Abdelnaby MM.
[18] Tawansi A, El-Khodary A, Abdelnaby MM.
[28] Abdelrazek EM, ElDamrawi G, Al-Shahawy A.
Sharma et al., Materi- als Chemistry and Physics, vol. 134, no. 2-3, pp. 1121–1126, 2012

Incorporation of ferrite magnetic nanoparticles with semiconductor materials as catalysts has been carried out by several previous researchers such as Bai researching photocatalytic activity using ZnFe2O4/Fe2O3/ZnO nanoparticles and degradation reached 98% [28], Zhang et al. examined the photocatalytic activity with ZnFe2O4/Ag3VO4 nanoparticles with degradation reaching 99% [29], and Istiqomah et al. examining NiZnFe2O4/SiO2 nanoparticles for degradation of MB waste, the percentage of degradation is 96% [1].
El Qada, S.J.
El-Maghrabi, F.S.

The ratio of neutral and cationic surfactants of C(n)-MCM-48 Synthesis of C-MCM-48 by Joo et al. [25] using the CTAC cationic surfactant has the shortest reaction time compared to using the CTAB surfactant at optimum conditions, as shown in Figure 4.
[13] El Abdi, R., Rujinski, A.
Jacobsohn, Luminescence of ZnS:Ag scintillator prepared by the hydrothermal reaction method: Effects of reaction temperature and time, Ag concentration, and co-doping with Al, Opt.
El Abdi, A.

Comparison of reduced Nusselt and Sherwood numbers with existing literature i.e and , with Gr, Gc, S, M, Ru, k,=0, and Pr = Le = 10 Nb Nt Rafique et al.(2020) Rafique et al.(2020) Current work Current work 0.1 0.1 0.9524 2.1294 0.9524 2.1294 0.2 0.2 0.3654 2.5152 0.3654 2.5152 0.3 0.4 0.3 0.4 0.1355 0.0495 2.6088 2.6038 0.1355 0.0495 2.6088 2.6038 In engineering, the inclination angle can refer to the angle at which a surface or structure deviates from the horizontal or vertical plane.
El-dawy, R.
El-Sayed, S.