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El-Hofy, Machining Technology: Machine Tools and Operations, CRC Press, 2008
Hatala et.al, T-Vc Dependence for sintered metal in standard ISO 3685, Technological Engineering 7/2 (2010) 6-9
Zelenak et al, Comparison of mechanical properties of surface layers with use of nanoindentation and microindentation tests, Metalurgija 51/3 (2012) 309-312
Zajac et al, Cutting facilities of new type of came cutting material, in: Proceedings of the Conference PPTO, Košice, 1995, pp. 138-139
Cep et al, Surface roughness after machining and influence of feed rate on process, Key Engineering Materials 581 (2014) 341-347.

The exit gas from combustion was passed through and measured by a element analyzer (Vario EL Ⅲ, Elementar, Germany).
Wang, et al.: Biomacromolecules, Vol. 9(2008), p. 3157 [2] J.
Singh, et al.: Ind Eng Chem Res, Vol. 45(2006), p. 3059 [4] J.
Liu, et al.: Polym Bull, Vol. 58(2007), p. 913 [5] S.
Dawson, et al.: J.

., et al., Design, construction, and field testing of an ultra-high performance concrete pi-girder bridge, 2011
[13] Kreiger, E.L., Model to describe the mode I fracture of steel fiber reinforced ultra-high performance concrete. 2012
[16] Bartolo, P., et al., Biomedical production of implants by additive electro-chemical and physical processes.
[21] Winnefeld, F., et al., Effects of the molecular architecture of comb-shaped superplasticizers on their performance in cementitious systems.
[28] Alberti, G., et al., Polymeric proton conducting membranes for medium temperature fuel cells (110–160 C).

According to Rush et al., Fe(VI) in water transforms into some intermediates, such as Fe(V), Fe(IV), hydrogen peroxide and other complexes until hydroxides of Fe(III) finally form and oxygen is released[4].
Jiang et al. compared Fe(VI) with coagulants in sewage treatment and found that the removal ef.ciency of total chemical oxygen demand (COD) by Fe(VI) was 5–20% higher than that of the ferric- and aluminum salts used in the same concentration.
Lee et al. [13] examined the dual functions of Fe(VI) to oxidize micropollutants and to remove phosphates using wastewater spiked with micropollutants such as phenols, anilines, amines and ole.ns.
Applying higher Fe(VI) dose, higher COD and TOC removal were achieved, similar to the results reported by Bandala et al..
[10] E.L.

The results of the chemical composition test of the weld metal obtained that the composition is close to Al 5083 base metal so that the mechanical properties of the weld metal tend to be identical with Al 5083 alloy.
In line with the test process tensile done well test process composition of elements of the alloy which contained the metal base of Al 5083 and Al 6061-T6 and metal welds GTAW.
The PPM simulation process is only carried out on GTAW weld metal alloy elements (PPM base metals Al 5083 and Al 6061 T6 are not discussed in this paper).
Composition of dissimilar base metal alloys (Al 5083 and Al 6061-T6) and GTAW weld metal.
E.L.

In other words, Tahri et al. (2013) gave a simple understanding which is biodegradation known as a process to break down the organic chemicals by essential agents such as microorganisms concerning their biological action.
However, face masks do not systematically analyze the impact of the spread on COVID-19 as claimed by Mitze et al. (2006).
Dussud et al. (2018) has proved that there are four distinct polymers that has an abundance of bacterial community on the surfaces and each of them are different from one another.
Adhikari et al. (2016) claimed a few benefits from OM to the soil that OM decomposes to provide nutrients and make a good addition for the sandy soil as it improves water retention.
[3] Tahri, N., Bahafid, W., Sayel, H., & El Ghachtouli, N. (2013).

Methodology A nanocomposite of Fe2O3-Al2O3 was prepared by the sol-gel method, where aluminum nitrate nonahydrate, Al(NO3)3·9H2O and ferric nitrate nonahydrate, Fe(NO3)3·9H2O was used as the Al3+ and Fe3+ precursor and distilled water as solvent.
As discussed by Healy et al. (1975), the linearity of these graphs is a reflection of the stabilized oil bank formed ahead of the displacing fluid, which is in this current experiment, the cobalt-iron ferrite nanofluid [21].
El-Diasty, Benefits and Applications of Nanotechnology in Oil Industries: Upstream and Downstream Operations- Egypt, Petroleum Today. 16 (2013)28-38
Yahya et al, Cobalt Ferrite Nanoparticles: An Innovative Approach for Enhanced Oil Recovery Application, J.

[13] Elhelbawy nahla gamal el din emam, Abd El-Hatery A, Ahmed M.
[15] Chen A, Blanchard J, Han SW, Conrad JR, Dodd RA, Fetherston P, et al.
[21] Xu J, Lane CD, Ou J, Cockcroft SL, Maijer DM, Akhtar A, et al.
[34] Kaisar N, Huang Y-T, Jou S, Kuo H-F, Huang B-R, Chen C-C, et al.
[36] Liu J, Wang X, Hu Y, Luo L, Jiang C, Liu F, et al.

Mathematical Modeling of Agricultural Insurance Pricing in Morocco KOUACH Yassine1,a, EL ATTAR Abderrahim1,b* and EL HACHLOUFI Mostafa1,c 1Department of Statistics and Mathematics Applied to Economics and Management, FSJES Ain Sebaa, University Hassan II, Casablanca, Morocco ayassine.kouach-etu@etu.univh2c.ma, btous_messages@yahoo.com, cmostafa.elhachloufi@univh2c.ma Keywords: Mathematical Modelling, Agriculture Insurance, Index Insurance, Yield Insurance, Pure Premium, Ordinary Differential Equations, Variable Separable Method.
The pure premium 𝑝𝑝 that the insured will pay to underwrite the index yield insurance is expressed as the expectation of the loss in the yield expressed as: pp=EL
Dhillon et al., Effects of simulated hail damage and foliar-applied recovery treatments on growth and grain yield of wheat, field pea, and dry bean crops, Canadian Journal of Plant Science 101 (2021)
Zhang et al., Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis, Int J Environ Res Public Health 15 (2018) 839
Jones et al., The DSSAT cropping system model, European Journal of Agronomy 18 (2003) 235–265

Ma et al. [12], Niasari et al [13] and Chen et al. [14] prepared nano PbO combination of precipitation and thermal decomposition route.
Li et al. [15] prepared PbO with one step solid state reaction of Pb(II) compound with NaOH at room temperature but only α- PbO can be obtained.
Liping et al. [11] reported the crystal growth of stable β-PbO crystals of large dimensions using hydrothermal route.
The band gap values for P75, P200,P300,P400 and P500 corresponding to β - PbO is in close agreement with the values reported by Perry et al. [18] and Xia et al. [19] which is 2.7 eV for β - PbO.
El - Damrawi, E.