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Online since: October 2008
Authors: Pelmane Lenge Mulongo, Stephen Ekolu
., and El-Khatib J.M., "Influence of initial curing on sulphate resistance of blended
cement concrete".
Baghabra Al-Amoudi O.S., 'Attack on plain and blended cements exposed to aggressive sulfate environments', Cement and Concrete Composites 24 (2002) 305-316 19.
Al-Amoudi O.S.B., Maslehuddin M., and Abdul-Al Y.A.B, "Role of Chloride Ions in Ezpansion and Strength Reduction in Plain and Blended Cements in Sulfate Environments", Construction and Building Materials, Vol 9, No 1, pp 25-33, 1995 22.
Baghabra Al-Amoudi O.S., 'Attack on plain and blended cements exposed to aggressive sulfate environments', Cement and Concrete Composites 24 (2002) 305-316 19.
Al-Amoudi O.S.B., Maslehuddin M., and Abdul-Al Y.A.B, "Role of Chloride Ions in Ezpansion and Strength Reduction in Plain and Blended Cements in Sulfate Environments", Construction and Building Materials, Vol 9, No 1, pp 25-33, 1995 22.
Online since: March 2019
Authors: Wai Lin, Ola Gawi, Quosay A. Ahmed, Mohammed Abdalla Ayoub, Anas Hasan, Mysara Eissa Mohyaldinn, Mokhtar Che Ismail
Olusegun et al [9] have tested Jatropha leaves extract for corrosion inhibitors and reported corrosion inhibition efficiency of 93.69%.
Abd-El-Nabey, and M.
[12] J., O.S., et al., Jatropha Curcas Leaves Extract as Corrosion Inhibitor for Mild Steel in 1M Hydrochloric Acid.
[15] O., M., et al., Inhibition of Steel Corrosion in 1M HCl by Jatropha Curcas oil.
Abd-El-Nabey, and M.
[12] J., O.S., et al., Jatropha Curcas Leaves Extract as Corrosion Inhibitor for Mild Steel in 1M Hydrochloric Acid.
[15] O., M., et al., Inhibition of Steel Corrosion in 1M HCl by Jatropha Curcas oil.
Online since: December 2010
Authors: K.V. Kavokin, D.R. Yakovlev, Ilya A. Akimov, G.V. Astakhov, R.I. Dzhioev, V.I. Korenev, Y.G. Kusrayev, M. Bayer, L.W. Molenkamp
Dzhioev et al.
Astakhov et al.
Akimov et al.: Phys.
Karlik et al.: Fiz.
Ploog, E.L.
Astakhov et al.
Akimov et al.: Phys.
Karlik et al.: Fiz.
Ploog, E.L.
Online since: November 2012
Authors: Vijay R. Raghavan, Normayati Nordin, Zainal Ambri Abdul Karim, Safiah Othman
Bourgeois et al. [10] have considered four turbulence models to predict the mean flow fields of a fish tail-shape diffuser that was incorporated in the aero engine centrifugal compressor.
The k-W and k- e turbulence models have been used by Ibrahim et al. [13] to investigate the effect of curvature and cross-sectional transitioning on the performance of S-shape diffuser.
Effect of varying area ratio (AR) and inflow Reynolds number (Rein) on outlet pressure recovery (Cp) Area ratio (AR) Outlet pressure recovery (Cp) Maximum percentage of improvement (%) Rein=23 Rein =2.653E+04 Rein =7.959E+04 Rein =1.592E+05 Rein =2.123E+05 1.6 -5.744 0.320 0.368 0.392 0.403 26 2.0 -4.861 0.373 0.425 0.448 0.458 23 3.0 -4.023 0.422 0.492 0.515 0.524 24 Maximum percentage of improvement (%) 32 34 31 30 According to Wang et al. [9], the high inflow Reynolds number, Rein>500 should be used in order to improve the recovery.
El-Askary and M.
The k-W and k- e turbulence models have been used by Ibrahim et al. [13] to investigate the effect of curvature and cross-sectional transitioning on the performance of S-shape diffuser.
Effect of varying area ratio (AR) and inflow Reynolds number (Rein) on outlet pressure recovery (Cp) Area ratio (AR) Outlet pressure recovery (Cp) Maximum percentage of improvement (%) Rein=23 Rein =2.653E+04 Rein =7.959E+04 Rein =1.592E+05 Rein =2.123E+05 1.6 -5.744 0.320 0.368 0.392 0.403 26 2.0 -4.861 0.373 0.425 0.448 0.458 23 3.0 -4.023 0.422 0.492 0.515 0.524 24 Maximum percentage of improvement (%) 32 34 31 30 According to Wang et al. [9], the high inflow Reynolds number, Rein>500 should be used in order to improve the recovery.
El-Askary and M.
Online since: October 2013
Authors: Radoslaw Zimroz, Jacek Dybała
The empirically determined local mean of original signal is defined as:
(4)
where: EL(t) is the empirically determined lower envelope of the original signal (the subject of decomposition) and EU(t) is the empirically determined upper envelope of the original signal.
Zimroz, Application of Empirical Mode Decomposition for impulsive signal extraction to detect bearing damage – industrial case study, in: Fakhfakh T. et al .
Fakhfakh, et al .
Gelman et al, Adaptive vibration condition monitoring technology for local tooth damage in gearboxes, Insight: Non-Destructive Testing and Condition Monitoring 47(8) (2005) 461-464
Zimroz, Application of Empirical Mode Decomposition for impulsive signal extraction to detect bearing damage – industrial case study, in: Fakhfakh T. et al .
Fakhfakh, et al .
Gelman et al, Adaptive vibration condition monitoring technology for local tooth damage in gearboxes, Insight: Non-Destructive Testing and Condition Monitoring 47(8) (2005) 461-464
Online since: October 2014
Authors: Erkul Karacaoglu, Bekir Karasu, Esra Öztürk
Lin et all. al. suggested and proved that Ca2MgSi2O7:Dy3+ is a novel white long-lasting phosphor [4-5].
[2] Yesilay Kaya, S., Karacaoglu, E. and Karasu, B., Effect of Al/Sr ratio on the luminescence properties of SrAl2O4: Eu2+, Dy3+ phosphors, Cer.
Al.
[10] El Kazazz, H., Karacaoglu, E., Karasu, B., Agatekin, M., Production of violet-blue emitting phosphors via solid state reaction and their uses in outdoor glass fountain, J.
[2] Yesilay Kaya, S., Karacaoglu, E. and Karasu, B., Effect of Al/Sr ratio on the luminescence properties of SrAl2O4: Eu2+, Dy3+ phosphors, Cer.
Al.
[10] El Kazazz, H., Karacaoglu, E., Karasu, B., Agatekin, M., Production of violet-blue emitting phosphors via solid state reaction and their uses in outdoor glass fountain, J.
Online since: September 2013
Authors: K. Thenmalar, A. Allirani
Following its introduction from Kirkpatrick et al [8], simulated annealing is mainly applied to large-scale combinatorial optimization problems.
Metropolis et al [9] were the first to suggest a method for calculating a distribution of a system of elementary particles (molecules) at the thermal balance state.
Al-Kalaani, “Power generation scheduling algorithm using dynamic programming,” Nonlin.
El-Hawary,“Optimization methods applied for solving the short-term hydrothermal coordination problem,” Elect.
Metropolis et al [9] were the first to suggest a method for calculating a distribution of a system of elementary particles (molecules) at the thermal balance state.
Al-Kalaani, “Power generation scheduling algorithm using dynamic programming,” Nonlin.
El-Hawary,“Optimization methods applied for solving the short-term hydrothermal coordination problem,” Elect.
Online since: October 2011
Authors: U.U. Akonye, Ogbonna F. Joel
Nasr-El-Din, A.M.
Al-Mohammed, A.D.
Al-Aamri, O.A.
Al-Fuwaires: “A study of gel degradation, surface tension and their impact on the productivity of hydraulically fractured gas wells” SPE Paper 109690.
Al-Mohammed, A.D.
Al-Aamri, O.A.
Al-Fuwaires: “A study of gel degradation, surface tension and their impact on the productivity of hydraulically fractured gas wells” SPE Paper 109690.
Online since: July 2014
Authors: Lam Suvarna Raju, A. Kumar, S. Rajendra Prasad
Elangovan et al. [2] studied five tool profiles i.e Straight cylindrical, threaded cylindrical, taper cylindrical, square and triangular, for the welding of AA 6061 aluminium alloy and found that the square pin profiled tool produces defect free welds for all the axial forces used.
Similarly, Lee et al. [3] achieved defect-free joining of 4-mm-thick copper plate at a rotation rate of 1250 rpm and a traverse speed of 61 mm/min.
Mechanical properties of copper weldments Tool rotation speed (rpm) Weld speed (mm/min) UTS (MPa) YS (MPa) % El Micro hardness (HV) Impact strength (J) 900 25 121 95 8.8 62 8 900 31.5 135 102 9.1 71 8 900 40 168 109 13.5 85 12 900 50 142 112 10.4 65 8 1120 40 139 105 10 77 10 Base Metal 260 231 31 110 18 Effect of tool rotation speed In FSW, tool rotational speed is a function of intense stirring and mixing of the material around the rotating tool pin profile which in turn increase the heat input within the stirred material.
Microstructural Factors Governing Hardness in Friction-Stir-Welds of Solid-Solution-Hardened Al Alloys.Metall.
Similarly, Lee et al. [3] achieved defect-free joining of 4-mm-thick copper plate at a rotation rate of 1250 rpm and a traverse speed of 61 mm/min.
Mechanical properties of copper weldments Tool rotation speed (rpm) Weld speed (mm/min) UTS (MPa) YS (MPa) % El Micro hardness (HV) Impact strength (J) 900 25 121 95 8.8 62 8 900 31.5 135 102 9.1 71 8 900 40 168 109 13.5 85 12 900 50 142 112 10.4 65 8 1120 40 139 105 10 77 10 Base Metal 260 231 31 110 18 Effect of tool rotation speed In FSW, tool rotational speed is a function of intense stirring and mixing of the material around the rotating tool pin profile which in turn increase the heat input within the stirred material.
Microstructural Factors Governing Hardness in Friction-Stir-Welds of Solid-Solution-Hardened Al Alloys.Metall.
Online since: December 2016
Authors: Xiang Shen, Zhong Min Xie, Yong Quan Deng, Song Ji
Ormiston et al. [10] subjected bench testing to compress and elongate 7 contemporary clinical stents and illustrated the stents with less connector numbers shortened the most.
Hsiao et al. [14] established the three-dimensional longitudinal compression model using FEA to study and analyze the LSD, and their results indicated that LSS of stent with the offset peak-to-peak design pattern is higher than that of stent with peak-to-peak design pattern, especially stated that LSD was mainly influenced by the number of connectors.
Ragkousis et al. [15] reconstructed a patient specific stenosed right coronary artery model to simulate longitudinal stent compression in vitro and vivo environment, and emphasized the importance of connector numbers and angulation of connectors between the struts to resist compression.
El-Omar, B.
Hsiao et al. [14] established the three-dimensional longitudinal compression model using FEA to study and analyze the LSD, and their results indicated that LSS of stent with the offset peak-to-peak design pattern is higher than that of stent with peak-to-peak design pattern, especially stated that LSD was mainly influenced by the number of connectors.
Ragkousis et al. [15] reconstructed a patient specific stenosed right coronary artery model to simulate longitudinal stent compression in vitro and vivo environment, and emphasized the importance of connector numbers and angulation of connectors between the struts to resist compression.
El-Omar, B.