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Machining Induced Defects and the Influence Factors When Diamond Turning of SiCp/Al Composites Y.F.
Yuan et al. [4] have studied the ultra-precision machinability of SiC whisker reinforced aluminum alloy composite (SiCw/Al).
Han et al. [5] carried out an experiment on ultra-precision machining of SiCw/2024Al by PCD cutters.
El-Gallab et al.[2], Ra is merely an average value of surface profile traces, and could not exactly depict the characteristics of SiCp/Al workpiece surface which including grooves, cracks, pits and so on.
El-Gallab and M.

Tool Wear Progression and Optimization in End Milling of AISI 316 Stainless Steel ODEDEYI Peter Babatunde1,a and ABOU-EL-HOSSEIN Khaled2,b 1,2Precision Engineering Laboratory, Mechatronics Department, School of Engineering, Nelson Mandela University, Port Elizabeth, South Africa as215391292@mandela.ac.za, bKhaled.abou-el-hossein@mandela.ac.za Keywords: Tool wear; stainless steel; Tool life; Flank wear Abstract: The high-performance machining of difficult-to-cut stainless steel (AISI 316) demands the development and optimization of high-performance tools that can withstand tool load without compromising the surface quality of the components been produced.
According to Krolczyk et al, [1] in their study to determine the coated carbides tool life and the tool point surface topography.
Liu et al, [2] in their study presented how tool nose radius affects the residual stress distribution significantly.
Reddy et al. carried out a machining study on AISI 1040 steel by applying cryogenic treatment to P-40 tungsten carbide tools.
Ihsan et al. [9] carried out turning tests on AISI 304 austenitic stainless steel to determine the optimum machining parameters.

Thickness Effect of ZnO Film on the Performance of Photocatalytic in a p-NiO/n-ZnO Heterostructure Under Solar Light Irradiation HIchem FARH1,2,a*, Abdelouahab NOUA1,b, Rebai GUEMINI1,c, Djamal Eldine GUITOUME3,d,  Oussama ZAOUI4,e 1Laboratory of Active Components and Materials, Larbi Ben M'Hidi University, Oum El Bouaghi 04000, Algeria 2Department of Material Sciences, Faculty of Exact sciences, LarbiTébessi University, Tébessa, 12002, Algeria. 3Research Unit in Optics and Photonics (UROP-CDTA), El Bez, Sétif1 University, Sétif, Algeria. 4Department of Material Sciences, Faculty of Exact sciences, Tahri Mohammed University, Bechar, 08000, Algeria.
The photocatalytic experiments were carried out at room temperature in sunny days of November from 9 AM to 2 PM at the Laboratory of Active Components and Materials (Larbi Ben M'hidi University, Oum El Bouaghi, Algeria).
Soleimanpour et al reported that when the thickness of film increased the grain size also increased and film coverage improved which caused a higher dispersion of the incident light [30] .
Zhang et al [31], and based on Alzahrani et al [32] research found that 200 nm is the optimal thickness of the ZnO for the NiO/ZnO heterojunction optimal properties[32], we conclude that’s why S6 presents the best photocatalytic activity because the thickness of S6 is the closest to 200nm and that give the NiO/ZnO heterojunction the optimal electrical properties, Kaneva et al [33] also reported that’s ZnO films with 7 coats have better photocatalytic efficiency compared to less coating number (1, 3 and 5).
The authors are very grateful to Active Devices and Materials Laboratory, Oum el Bouaghi University, Algeria.

Abd ElRazik3,c 1Department of Architecture, Faculty of Engineering, Badr University in Cairo (BUC), Cairo, Egypt 2Department of Architecture, Faculty of Engineering, Cairo University, Cairo, Egypt 3Housing and Building National Research Center (HBRC), Building Physics Institute (BPI), Cairo, Egyp asmart_concept.99@hotmail.com, bhesham_sameh@yahoo.com, cm_razik2005@yahoo.com Keywords: Mortar, Waste glass, Thermal conductivity, Solar reflectivity, Energy saving, Flexural strength Abstract.
[6] Shoukry H, Kotkata MF, Abo-EL-Enein SA, Morsy MS, Shebl SS.
[12] Al-Jabri K, Shoukry H, Mokhtar MM, Morsy MS.
[14] ASTM_C1329/C1329M-16a, Standard Specification for Mortar Cement, 10.1520/C1329_C1329M-16A, ASTM International, West Conshohocken, PA (2016) [15] Hassan AM, Aly RM, Alzahrani AM, Abd El-razik MM, Shoukry H.

Beauger et al. [5,6,7] was proposed a model for the reaction of BaTiO3 from BaCO3 and TiO2 precursors as follows: BaCO3 + TiO2 BaTiO3 + CO2 (1) BaTiO3 + BaCO3 Ba2TiO4 + CO2 (2) Ba2TiO4 + TiO2 2BaTiO3 (3) This procedure is a low cost technique.
El-Sayed Ali, S.M.El-Raghy and S.El-Houte, Formation mechanism of barium titanate by solid-state reactions, International Journal of Scientific & Engineering Research, Vol.5, Issue 7, (2014) 1460-1465

Higher % E.L. and % R.A. with modified heat treatment cycle indicates better toughness.
(MPa) % EL 25 mm GL % RA 335oC/3hrs 1295-1313 1191-1238 2-3 4-7 400oC/3hrs 924-962 749-774 15.8-17.8 40-48 425oC/3hrs 824-877 637-696 19-21 49-55 The samples aged at 335°C / 3 hrs and 400°C / 3 hrs show RT (room temperature) impact energy of 8 J and 28 J respectively.
Behjati et. al. have reported similar dispersion of precipitate [7].
It yields 0.2 % Y.S of 761 MPa, UTS of 943 MPa, % EL of 16 and % RA of 44.

El Achouri et al. studied the corrosion inhibition of iron by alkanediyl-α,ω-bis-(dimethylalkyl ammonium bromide) in 1M hydrochloric acid and revealed that these gemini surfactants adsorbed on the iron surface according to the Frumkin isotherm model[3,4].
El Achouri, M.S.
[4] M.El Achouri,S.Kertit,H.M.Gouttaya, B.

Al-Dhifi: J.
El-Khabeery, et al.: Int.
El-Axir, M.M.
El-Khabeery: J.
Xiao, et al.: Trans.

Al-Dawody, A.
El-Araby, K.
El-Ibiari, A.
El Morsi, and G.
El Fatih, and A.

Evaluation of Antioxidants, Pigments and Secondary Metabolites Contents in Spirulina platensis Hamdy Elsayed Ahmed Ali1,a, Sanaa Mahmoud Metwally Shanab2,b, Mervat Aly Mohamed Abo-State3,c, Emad Ahmed Ahmed Shalaby4,d, Usama Mohamed Nour El Demerdash1,e, Mohd Azmuddin Abdullah1,f * 1Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia. 2Department of Botany and Microbiology, Faculty of Science, Cairo University, 12613 Giza, Egypt. 3Department of Microbiology, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Egypt. 4Department of Biochemistry, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt.
Mostafa and N.S.El-Gendy, Evaluation of fuel properties for microalgae Spirulina platensisbio-diesel and its blends with Egyptian petro-diesel, Arab.
El-Masry, S.
Ibanez, et al..., Screening of Functional Compounds In Supercritical Fluid Extracts from Spirulina Platensis.
Ledon, et al..., C-Phycocyanin A Biliprolein With Antioxidant, Anti-Inflammatory and Neuroprotective Effects.