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Rw = rRN = rR.N (1) with: Rw : roundness r : radius of each individual corners R : radius of biggest imaginer circle inside particle N : number of individual corners The roundness of Sidrap sands before and after milling, as well as Ottawa sand were also measured in two laboratories: (a) Laboratory of Minerals and Materials, Sucofindo, Jakarta, and (b) Laboratory of Petrology, Study Program of Geological Engineering, Faculty of Earth Sciences and Technology, ITB, Bandung.
Alam, Use of selected silica deposits of Bangladesh as standard sand in testing compressive strength of hydraulic cement mortars: A proposal for strength correlation, Journal of Civil Engineering, 40 (2), (2012) 181-202
Fijabi, Standard sand for geotechnical engineering and geoenvironmental research in Nigeria: Igbokoda sand, Advances in Environmental Research, Vol. 1, No.4, (2012), 305-321
Forum, vol. 1000 MSF, pp. 220–226, 2020. https://doi.org/10.4028/www.scientific.net/msf.1000.220 [7] W.
J. of Structural and Civil Engineering Research, Vol. 2, No. 3, (2013), 62-80

Introduction Recently, the stress on asset life prediction and prognostics has increased in the field of Engineering Asset Management (EAM) due to planning requirements and budgeting constraints.
Sun, “A review on reliability models with covariates,” in Engineering Asset Lifecycle Management, Springer, 2010, pp. 385–397
Lu, “Imperfect repair model for complex repairable system-a literature survey with discussion,” in Industrial Engineering and Engineering Management (IEEM), 2015 IEEE International Conference on, 2015, pp. 807–811
Jiang, “Reliability Modeling of Repairable Systems,” in Introduction to Quality and Reliability Engineering, Springer, 2015, pp. 89–109
Muralidharan, “A review of repairable systems and point process models,” in ProbStat Forum, 2010, vol. 1, pp. 26–49

Matsunami2, d 1 Department of Electronic Science and Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510, Japan 2 Innovation Plaza Kyoto, JST, 1-30 Goryo-Ohara, Nishikyo, Kyoto 615-8245, Japan a kimoto@kuee.kyoto-u.ac.jp, b k-danno@semicon.kuee.kyoto-u.ac.jp, chori@semicon.kuee.kyoto-u.ac.jp, dhmatsunami@kyoto.jst-plaza.jp Keywords: chemical vapor deposition, fast epitaxy, basal plane dislocation, deep level, carbon vacancy Abstract.
Forum, Vol. 389-393 (2002), p. 171
Janzén: Silicon Carbide - Recent Major Advances (Springer, Berlin, 2004), p. 461
Forum, Vol. 483-485 (2005), p. 97

Parmin3,d 1Laser and Optoelectronic Engineering Department, University of Technology-Iraq 2Applied Science Department, University of Technology-Iraq 3Institute of Nano Electronic Engineering, University Malaysia Perlis, 01000 Kangar, Perlis, Malaysia azahraa.s.qasim@uotechnology.edu.iq, bsarmad.f.alhasan@uotechnology.edu.iq, cevan_tarq@yahoo.com & evan.t.salim@uotechnology.edu.iq, dazizahparmin@unimap.edu.my Keywords: Cu2O thin film; laser energies; physical properties; visible photodetectors.
Series: Materials Science and Engineering 454(1) (2018) 012172 [23] M.
Chao, Stable Cu2O Photoelectrodes by Reactive Ion Beam Sputter Deposition, Advances in Materials Science and Engineering 2018 (2018) Article ID 3792672
Hamoudi, Characterization of nanostructured hydroxyapatite prepared by Nd:YAG laser deposition, Materials Science and Engineering C 33(1) (2013) 47-52
Fakhry, Synthesis of Bi2O3 films, studying their optical, structural, and surface roughness properties, IOP Conference Series Materials Science and Engineering 454(1) (2018) 012160

Hashim3,d 1Laser and Optoelectronic Engineering Department, University of Technology-Iraq 2Al-Mustaqbal University College, Department of Medical Physics, Iraq 3Institute of Nano Electronic Engineering, University Malaysia Perlis, 01000 Kangar, Perlis, Malaysia awasan.a.hekmat@uotechnology.edu.iq, bnajwan.h.numan@uotechnology.edu.iq cforat_hamza@mustaqbal-college.edu.iq, duda@unimap.edu.my Keywords: Cu2O thin film; PLD; Structural properties; morphological properties; optical properties Abstract.
Series: Materials Science and Engineering 454(1) (2018) 012172 [23] M.
Chao, Stable Cu2O Photoelectrodes by Reactive Ion Beam Sputter Deposition, Advances in Materials Science and Engineering 2018 (2018) Article ID 3792672
K.Hamoudi, Characterization of nanostructured hydroxyapatite prepared by Nd:YAG laser deposition, Materials Science and Engineering C 33(1) (2013) 47-52
Fakhry, Synthesis of Bi2O3 films, studying their optical, structural, and surface roughness properties, IOP Conference Series Materials Science and Engineering 454(1) (2018) 012160

Key Engineering Materials, 951, 73-83
Key Engineering Materials, 930, 169-178
Key Engineering Materials, 951, 173-183
Key Engineering Materials, 892, 134-141
The International Journal of Advanced Manufacturing Technology, 129(11), 5541-5560

College of Engineering, Davangere-577004, Karnataka, India 2Department of Mathematics, Garden City College of Science and Management Studies, Bangalore 560049, Karnataka, India 3Department of Mathematics, K.L.E.Society’s J.T.
Defect and Diffusion Forum, 377 (2017) 233-241
Teknologi (Sciences & Engineering), 71(5) (2014) 17–20
Ye,MHD stagnation point flow of Carreau fluid toward a permeable shrinking sheet:Dual solutions, Ain Shams Engineering Journal, 5(4)(2014) 1233-1239
Khan,Unsteady MHD Falkner-Skan flow of Cassonnanofluid with generative/destructive chemical reaction,Chemical Engineering Science, 172 (2017) 694–706

Introduction Since its discovery in the early 1970s SSM processing of alloys and composites has shown great potential for engineering applications where high component integrity was required [1,2].
Kapranos, “Thixoforming 7075 aluminium alloys”, Materials Science and Engineering A, 390, 2005, pp 3-12 [5] A.M.
Fan, “Rheo-processing of an alloy specifically designed for semi-solid metal processing based on the Al-Mg-Si system”, Materials Science and Engineering A, 476, 2008, pp 341-349 [9] M.S.
Mohammed, “Thermodynamic Calculations of Aluminium Alloys for Semi-Solid Processing”, Recent Advances in Mathematics In Proceedings of the 7th Int.
Govender, “Anodising of Al-Mg-Si-(Cu) alloys produced by R-HPDC”, Proceedings of LMT 2013 conference Materials Science Forum, Vol. 765, 2013, pp. 658-662.

Acknowledgements Authors wish to thank Dr Samia Lemboub, Head of Science and Materials Engineering Department at the National higher school of mining and metallurgy Amar Laskri of Annaba/Algeria as well as all laboratory staff for carrying out the scanning electron microscope observations and tribology tests.
Maldonado, Effect of titanium on the as-cast microstructure of a 16%chromium white iron, Materials Science and Engineering A 398 (2005) 297-308
Petrov, Isothermal transformations in advanced high strength steels below martensite start temperature, Mater Sci Technol 31 (2015) 808-816
Bond, Metal wear in crushing and grinding, Chemical Engineering Progress 60 (1964) 90-100
Navara, The role of corrosive wear during laboratory milling, Minerals Engineering 16 (2003) 619-624

Synthesis of n-Doped Reduced Graphene Oxide from Coconut Shell as Supercapacitors Imam Khambali1,2,a*, Irma Septi Ardiani1, Ahmad Rizki Kurniawan1, Triwikantoro1, Mochamad Zainuri1, Darminto1,3,b 1Department of Physics, Faculty of Science, Institut Teknologi Sepuluh Nopember (ITS), Surabaya 60111, Indonesia. 2Department of Electrical Engineering, Faculty of Engineering, University of Muhammadiyah Malang (UMM), Malang 65144, Indonesia. 3Center of Excellence in Automotive Control and System, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia.
Baqiya, and Darminto, “Synthesis of green Fe3+/glucose/rGO electrode for supercapacitor application assisted by chemical exfoliation process from burning coconut shell,” presented at the Proceedings of the 3rd International Conference on Materials and Metallurgical Engineering and Technology (ICOMMET 2017) : Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future, Surabaya, Indonesia, 2018, p. 020040
Astuti, and Darminto, “Study on Phase, Molecular Bonding, and Bandgap of Reduced Graphene Oxide Prepared by Heating Coconut Shell,” Materials Science Forum 827 (2015) 285