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Publisher: Elsevier   (Total: 3042 journals)

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Showing 1 - 200 of 3042 Journals sorted alphabetically
AASRI Procedia     Open Access   (Followers: 15)
Academic Pediatrics     Hybrid Journal   (Followers: 19, SJR: 1.402, h-index: 51)
Academic Radiology     Hybrid Journal   (Followers: 16, SJR: 1.008, h-index: 75)
Accident Analysis & Prevention     Partially Free   (Followers: 81, SJR: 1.109, h-index: 94)
Accounting Forum     Hybrid Journal   (Followers: 23, SJR: 0.612, h-index: 27)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 27, SJR: 2.515, h-index: 90)
Achievements in the Life Sciences     Open Access   (Followers: 4)
Acta Anaesthesiologica Taiwanica     Open Access   (Followers: 5, SJR: 0.338, h-index: 19)
Acta Astronautica     Hybrid Journal   (Followers: 325, SJR: 0.726, h-index: 43)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 3)
Acta Biomaterialia     Hybrid Journal   (Followers: 25, SJR: 2.02, h-index: 104)
Acta Colombiana de Cuidado Intensivo     Full-text available via subscription  
Acta de Investigación Psicológica     Open Access   (Followers: 2)
Acta Ecologica Sinica     Open Access   (Followers: 8, SJR: 0.172, h-index: 29)
Acta Haematologica Polonica     Free   (SJR: 0.123, h-index: 8)
Acta Histochemica     Hybrid Journal   (Followers: 3, SJR: 0.604, h-index: 38)
Acta Materialia     Hybrid Journal   (Followers: 204, SJR: 3.683, h-index: 202)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5, SJR: 0.615, h-index: 21)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9, SJR: 0.442, h-index: 21)
Acta Oecologica     Hybrid Journal   (Followers: 9, SJR: 0.915, h-index: 53)
Acta Otorrinolaringologica (English Edition)     Full-text available via subscription   (Followers: 1)
Acta Otorrinolaringológica Española     Full-text available via subscription   (Followers: 3, SJR: 0.311, h-index: 16)
Acta Pharmaceutica Sinica B     Open Access   (Followers: 2)
Acta Poética     Open Access   (Followers: 4)
Acta Psychologica     Hybrid Journal   (Followers: 22, SJR: 1.365, h-index: 73)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 5, SJR: 1.059, h-index: 77)
Acta Urológica Portuguesa     Open Access  
Actas Dermo-Sifiliograficas     Full-text available via subscription   (Followers: 4)
Actas Dermo-Sifiliográficas (English Edition)     Full-text available via subscription   (Followers: 3)
Actas Urológicas Españolas     Full-text available via subscription   (Followers: 4, SJR: 0.383, h-index: 19)
Actas Urológicas Españolas (English Edition)     Full-text available via subscription   (Followers: 2)
Actualites Pharmaceutiques     Full-text available via subscription   (Followers: 5, SJR: 0.141, h-index: 3)
Actualites Pharmaceutiques Hospitalieres     Full-text available via subscription   (Followers: 4, SJR: 0.112, h-index: 2)
Acupuncture and Related Therapies     Hybrid Journal   (Followers: 3)
Ad Hoc Networks     Hybrid Journal   (Followers: 11, SJR: 0.967, h-index: 57)
Addictive Behaviors     Hybrid Journal   (Followers: 15, SJR: 1.514, h-index: 92)
Addictive Behaviors Reports     Open Access   (Followers: 5)
Additive Manufacturing     Hybrid Journal   (Followers: 7, SJR: 1.039, h-index: 5)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 123, SJR: 5.2, h-index: 222)
Advanced Engineering Informatics     Hybrid Journal   (Followers: 11, SJR: 1.265, h-index: 53)
Advanced Powder Technology     Hybrid Journal   (Followers: 16, SJR: 0.739, h-index: 33)
Advances in Accounting     Hybrid Journal   (Followers: 9, SJR: 0.299, h-index: 15)
Advances in Agronomy     Full-text available via subscription   (Followers: 15, SJR: 2.071, h-index: 82)
Advances in Anesthesia     Full-text available via subscription   (Followers: 25, SJR: 0.169, h-index: 4)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 3)
Advances in Applied Mathematics     Full-text available via subscription   (Followers: 6, SJR: 1.054, h-index: 35)
Advances in Applied Mechanics     Full-text available via subscription   (Followers: 10, SJR: 0.801, h-index: 26)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 21, SJR: 1.286, h-index: 49)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 16, SJR: 3.31, h-index: 42)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4, SJR: 2.277, h-index: 43)
Advances in Botanical Research     Full-text available via subscription   (Followers: 3, SJR: 0.619, h-index: 48)
Advances in Cancer Research     Full-text available via subscription   (Followers: 25, SJR: 2.215, h-index: 78)
Advances in Carbohydrate Chemistry and Biochemistry     Full-text available via subscription   (Followers: 9, SJR: 0.9, h-index: 30)
Advances in Catalysis     Full-text available via subscription   (Followers: 5, SJR: 2.139, h-index: 42)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 24, SJR: 0.183, h-index: 23)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 10, SJR: 0.665, h-index: 29)
Advances in Chronic Kidney Disease     Full-text available via subscription   (Followers: 8, SJR: 1.268, h-index: 45)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 28, SJR: 0.938, h-index: 33)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18, SJR: 2.314, h-index: 130)
Advances in Computers     Full-text available via subscription   (Followers: 16, SJR: 0.223, h-index: 22)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in Digestive Medicine     Open Access   (Followers: 4)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Ecological Research     Full-text available via subscription   (Followers: 39, SJR: 3.25, h-index: 43)
Advances in Engineering Software     Hybrid Journal   (Followers: 25, SJR: 0.486, h-index: 10)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 40, SJR: 5.465, h-index: 64)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Food and Nutrition Research     Full-text available via subscription   (Followers: 45, SJR: 0.674, h-index: 38)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Genetics     Full-text available via subscription   (Followers: 15, SJR: 2.558, h-index: 54)
Advances in Genome Biology     Full-text available via subscription   (Followers: 12)
Advances in Geophysics     Full-text available via subscription   (Followers: 6, SJR: 2.325, h-index: 20)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 20, SJR: 0.906, h-index: 24)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 0.497, h-index: 31)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 24)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2, SJR: 0.396, h-index: 27)
Advances in Immunology     Full-text available via subscription   (Followers: 34, SJR: 4.152, h-index: 85)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 9, SJR: 1.132, h-index: 42)
Advances in Insect Physiology     Full-text available via subscription   (Followers: 3, SJR: 1.274, h-index: 27)
Advances in Integrative Medicine     Hybrid Journal   (Followers: 4)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 4)
Advances in Life Course Research     Hybrid Journal   (Followers: 8, SJR: 0.764, h-index: 15)
Advances in Lipobiology     Full-text available via subscription   (Followers: 2)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Marine Biology     Full-text available via subscription   (Followers: 16, SJR: 1.645, h-index: 45)
Advances in Mathematics     Full-text available via subscription   (Followers: 10, SJR: 3.261, h-index: 65)
Advances in Medical Sciences     Hybrid Journal   (Followers: 5, SJR: 0.489, h-index: 25)
Advances in Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Microbial Physiology     Full-text available via subscription   (Followers: 4, SJR: 1.44, h-index: 51)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 22)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 10)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 7, SJR: 0.324, h-index: 8)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 4)
Advances in Oncobiology     Full-text available via subscription   (Followers: 3)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15, SJR: 2.885, h-index: 45)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 7, SJR: 0.148, h-index: 11)
Advances in Parasitology     Full-text available via subscription   (Followers: 7, SJR: 2.37, h-index: 73)
Advances in Pediatrics     Full-text available via subscription   (Followers: 21, SJR: 0.4, h-index: 28)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 13)
Advances in Pharmacology     Full-text available via subscription   (Followers: 15, SJR: 1.718, h-index: 58)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 7, SJR: 0.384, h-index: 26)
Advances in Phytomedicine     Full-text available via subscription  
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3, SJR: 0.248, h-index: 11)
Advances in Plant Biochemistry and Molecular Biology     Full-text available via subscription   (Followers: 8)
Advances in Plant Pathology     Full-text available via subscription   (Followers: 5)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 19, SJR: 1.5, h-index: 62)
Advances in Psychology     Full-text available via subscription   (Followers: 58)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5, SJR: 0.478, h-index: 32)
Advances in Radiation Oncology     Open Access  
Advances in Small Animal Medicine and Surgery     Hybrid Journal   (Followers: 2, SJR: 0.1, h-index: 2)
Advances in Space Research     Full-text available via subscription   (Followers: 338, SJR: 0.606, h-index: 65)
Advances in Structural Biology     Full-text available via subscription   (Followers: 8)
Advances in Surgery     Full-text available via subscription   (Followers: 6, SJR: 0.823, h-index: 27)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 29, SJR: 1.321, h-index: 56)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 15)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 13)
Advances in Virus Research     Full-text available via subscription   (Followers: 5, SJR: 1.878, h-index: 68)
Advances in Water Resources     Hybrid Journal   (Followers: 43, SJR: 2.408, h-index: 94)
Aeolian Research     Hybrid Journal   (Followers: 5, SJR: 0.973, h-index: 22)
Aerospace Science and Technology     Hybrid Journal   (Followers: 307, SJR: 0.816, h-index: 49)
AEU - Intl. J. of Electronics and Communications     Hybrid Journal   (Followers: 8, SJR: 0.318, h-index: 36)
African J. of Emergency Medicine     Open Access   (Followers: 5, SJR: 0.344, h-index: 6)
Ageing Research Reviews     Hybrid Journal   (Followers: 7, SJR: 3.289, h-index: 78)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 422, SJR: 1.385, h-index: 72)
Agri Gene     Hybrid Journal  
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 15, SJR: 2.18, h-index: 116)
Agricultural Systems     Hybrid Journal   (Followers: 30, SJR: 1.275, h-index: 74)
Agricultural Water Management     Hybrid Journal   (Followers: 38, SJR: 1.546, h-index: 79)
Agriculture and Agricultural Science Procedia     Open Access  
Agriculture and Natural Resources     Open Access   (Followers: 1)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 50, SJR: 1.879, h-index: 120)
Ain Shams Engineering J.     Open Access   (Followers: 5, SJR: 0.434, h-index: 14)
Air Medical J.     Hybrid Journal   (Followers: 5, SJR: 0.234, h-index: 18)
AKCE Intl. J. of Graphs and Combinatorics     Open Access   (SJR: 0.285, h-index: 3)
Alcohol     Hybrid Journal   (Followers: 10, SJR: 0.922, h-index: 66)
Alcoholism and Drug Addiction     Open Access   (Followers: 6)
Alergologia Polska : Polish J. of Allergology     Full-text available via subscription   (Followers: 1)
Alexandria Engineering J.     Open Access   (Followers: 1, SJR: 0.436, h-index: 12)
Alexandria J. of Medicine     Open Access  
Algal Research     Partially Free   (Followers: 8, SJR: 2.05, h-index: 20)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
Allergologia et Immunopathologia     Full-text available via subscription   (Followers: 1, SJR: 0.46, h-index: 29)
Allergology Intl.     Open Access   (Followers: 5, SJR: 0.776, h-index: 35)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 6, SJR: 0.158, h-index: 9)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 46, SJR: 4.289, h-index: 64)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 5)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 3)
American Heart J.     Hybrid Journal   (Followers: 47, SJR: 3.157, h-index: 153)
American J. of Cardiology     Hybrid Journal   (Followers: 44, SJR: 2.063, h-index: 186)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 34, SJR: 0.574, h-index: 65)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 6, SJR: 1.091, h-index: 45)
American J. of Geriatric Psychiatry     Hybrid Journal   (Followers: 15, SJR: 1.653, h-index: 93)
American J. of Human Genetics     Hybrid Journal   (Followers: 30, SJR: 8.769, h-index: 256)
American J. of Infection Control     Hybrid Journal   (Followers: 24, SJR: 1.259, h-index: 81)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 32, SJR: 2.313, h-index: 172)
American J. of Medicine     Hybrid Journal   (Followers: 44, SJR: 2.023, h-index: 189)
American J. of Medicine Supplements     Full-text available via subscription   (Followers: 3)
American J. of Obstetrics and Gynecology     Hybrid Journal   (Followers: 179, SJR: 2.255, h-index: 171)
American J. of Ophthalmology     Hybrid Journal   (Followers: 54, SJR: 2.803, h-index: 148)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 2)
American J. of Orthodontics and Dentofacial Orthopedics     Full-text available via subscription   (Followers: 6, SJR: 1.249, h-index: 88)
American J. of Otolaryngology     Hybrid Journal   (Followers: 23, SJR: 0.59, h-index: 45)
American J. of Pathology     Hybrid Journal   (Followers: 23, SJR: 2.653, h-index: 228)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 21, SJR: 2.764, h-index: 154)
American J. of Surgery     Hybrid Journal   (Followers: 33, SJR: 1.286, h-index: 125)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 12, SJR: 0.653, h-index: 70)
Ampersand : An Intl. J. of General and Applied Linguistics     Open Access   (Followers: 5)
Anaerobe     Hybrid Journal   (Followers: 4, SJR: 1.066, h-index: 51)
Anaesthesia & Intensive Care Medicine     Full-text available via subscription   (Followers: 53, SJR: 0.124, h-index: 9)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 5)
Anales de Cirugia Vascular     Full-text available via subscription  
Anales de Pediatría     Full-text available via subscription   (Followers: 2, SJR: 0.209, h-index: 27)
Anales de Pediatría (English Edition)     Full-text available via subscription  
Anales de Pediatría Continuada     Full-text available via subscription   (SJR: 0.104, h-index: 3)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 2, SJR: 2.577, h-index: 7)
Analytica Chimica Acta     Hybrid Journal   (Followers: 38, SJR: 1.548, h-index: 152)
Analytical Biochemistry     Hybrid Journal   (Followers: 160, SJR: 0.725, h-index: 154)
Analytical Chemistry Research     Open Access   (Followers: 8, SJR: 0.18, h-index: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 10)
Anesthésie & Réanimation     Full-text available via subscription  
Anesthesiology Clinics     Full-text available via subscription   (Followers: 21, SJR: 0.421, h-index: 40)
Angiología     Full-text available via subscription   (SJR: 0.124, h-index: 9)
Angiologia e Cirurgia Vascular     Open Access  
Animal Behaviour     Hybrid Journal   (Followers: 152, SJR: 1.907, h-index: 126)
Animal Feed Science and Technology     Hybrid Journal   (Followers: 5, SJR: 1.151, h-index: 83)
Animal Reproduction Science     Hybrid Journal   (Followers: 5, SJR: 0.711, h-index: 78)
Annales d'Endocrinologie     Full-text available via subscription   (SJR: 0.394, h-index: 30)
Annales d'Urologie     Full-text available via subscription  
Annales de Cardiologie et d'Angéiologie     Full-text available via subscription   (SJR: 0.177, h-index: 13)
Annales de Chirurgie de la Main et du Membre Supérieur     Full-text available via subscription  
Annales de Chirurgie Plastique Esthétique     Full-text available via subscription   (Followers: 2, SJR: 0.354, h-index: 22)
Annales de Chirurgie Vasculaire     Full-text available via subscription   (Followers: 1)

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Journal Cover Ain Shams Engineering Journal
  [SJR: 0.434]   [H-I: 14]   [5 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Online) 2090-4479
   Published by Elsevier Homepage  [3042 journals]
  • Fault classification in power systems using EMD and SVM

    • Authors: N. Ramesh Babu; B. Jagan Mohan
      Pages: 103 - 111
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): N. Ramesh Babu, B. Jagan Mohan
      In recent years, power quality has become the main concern in power system engineering. Classification of power system faults is the first stage for improving power quality and ensuring the system protection. For this purpose a robust classifier is necessary. In this paper, classification of power system faults using Empirical Mode Decomposition (EMD) and Support Vector Machines (SVMs) is proposed. EMD is used for decomposing voltages of transmission line into Intrinsic Mode Functions (IMFs). Hilbert Huang Transform (HHT) is used for extracting characteristic features from IMFs. A multiple SVM model is introduced for classifying the fault condition among ten power system faults. Algorithm is validated using MATLAB/SIMULINK environment. Results demonstrate that the combination of EMD and SVM can be an efficient classifier with acceptable levels of accuracy.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2015.08.005
       
  • Optimal design and tuning of novel fractional order PID power system
           stabilizer using a new metaheuristic Bat algorithm

    • Authors: Lakhdar Chaib; Abdelghani Choucha; Salem Arif
      Pages: 113 - 125
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): Lakhdar Chaib, Abdelghani Choucha, Salem Arif
      This paper proposes a novel robust power system stabilizer (PSS), based on hybridization of fractional order PID controller (PI λ D μ ) and PSS for optimal stabilizer (FOPID-PSS) for the first time, using a new metaheuristic optimization Bat algorithm (BA) inspired by the echolocation behavior to improve power system stability. The problem of FOPID-PSS design is transformed as an optimization problem based on performance indices (PI), including Integral Absolute Error (IAE), Integral Squared Error (ISE), Integral of the Time-Weighted Absolute Error (ITAE) and Integral of Time multiplied by the Squared Error (ITSE), where, BA is employed to obtain the optimal stabilizer parameters. In order to examine the robustness of FOPID-PSS, it has been tested on a Single Machine Infinite Bus (SMIB) power system under different disturbances and operating conditions. The performance of the system with FOPID-PSS controller is compared with a PID-PSS and PSS. Further, the simulation results obtained with the proposed BA based FOPID-PSS are compared with those obtained with FireFly algorithm (FFA) based FOPID-PSS. Simulation results show the effectiveness of BA for FOPID-PSS design, and superior robust performance for enhancement power system stability compared to other with different cases.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2015.08.003
       
  • Effects of higher modes and MDOF on strength reduction factor of
           elastoplastic structures under far and near-fault ground motions

    • Authors: Mohsen Gerami; Navid Siahpolo; Reza Vahdani
      Pages: 127 - 143
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): Mohsen Gerami, Navid Siahpolo, Reza Vahdani
      In seismic codes, the force strength reduction factor is proposed to transform elastic to inelastic strength. The ductility reduction factor, Rμ , plays a key role on R factor if no overstrength is present. The Rμ is determined by SDOF systems. But the higher mode (HM) and Multi-Degree-of-Freedom (MDOF) effects need to be considered to extract the R factor. These effects are studied by proposing αv-MDOF via at least 1764 Nonlinear dynamic Analysis of 2D-frames. Also a sensitivity study has been performed on Rμ and αv-MDOF . Results obtained from studies conducted on the frames, indicate that HM and MDOF effects have a considerable influence on the base shear. Also the αv-MDOF is typically higher than unity both for ordinary and for near-field earthquakes and it is affected by period, span number and ductility level. These effects are remarkable for near-field motions. Finally, a simplified practical expression is proposed to estimate the αv-MDOF .

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2015.08.015
       
  • Mixed convection boundary layer flows of a non-Newtonian Jeffrey’s fluid
           from a non-isothermal wedge

    • Authors: S. Abdul Gaffar; V. Ramachandra Prasad; E. Keshava Reddy
      Pages: 145 - 162
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): S. Abdul Gaffar, V. Ramachandra Prasad, E. Keshava Reddy
      This article presents the nonlinear, steady state mixed convection boundary layer flow, heat and mass transfer of an incompressible non-Newtonian Jeffrey’s fluid past a non-isothermal wedge. The transformed conservation equations are solved numerically subject to physically appropriate boundary conditions using a versatile, implicit finite-difference Keller box technique. The influence of a number of emerging non-dimensional parameters, namely Deborah number (De), ratio of relaxation to retardation times ( λ ), pressure gradient parameter (m), Buoyancy ratio parameter (N), mixed convection parameter ( λ 1 ) , radiation parameter ( F ) and heat generation/absorption parameter ( Δ ) on velocity, temperature and concentration evolution in the boundary layer regime is examined in detail. Also, the effects of these parameters on surface heat transfer rate, mass transfer rate and local skin friction are investigated.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2015.09.005
       
  • Taxonomy of Cross-Platform Mobile Applications Development Approaches

    • Authors: Wafaa S. El-Kassas; Bassem A. Abdullah; Ahmed H. Yousef; Ayman M. Wahba
      Pages: 163 - 190
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): Wafaa S. El-Kassas, Bassem A. Abdullah, Ahmed H. Yousef, Ayman M. Wahba
      The developers use the cross-platform mobile development solutions to develop the mobile application once and run it on many platforms. Many of these cross-platform solutions are still under research and development. Also, these solutions are based on different approaches such as Cross-Compilation approach, Virtual Machine approach, and Web-Based approach. There are many survey papers about the cross-platform mobile development solutions but they do not include the most recent approaches, including Component-Based approach, Cloud-Based approach, and Merged approach. The main aim of this paper is helping the researchers to know the most recent approaches and the open research issues. This paper surveys the existing cross-platform mobile development approaches and attempts to provide a global view: it thoroughly introduces a comprehensive categorization to the cross-platform approaches, defines the pros and cons of each approach, explains sample solutions per approach, compares the cross-platform mobile development solutions, and ends with the open research areas.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2015.08.004
       
  • A hybrid particle swarm optimization and genetic algorithm with population
           partitioning for large scale optimization problems

    • Authors: Ahmed F. Ali; Mohamed A. Tawhid
      Pages: 191 - 206
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): Ahmed F. Ali, Mohamed A. Tawhid
      In this paper, a new hybrid particle swarm optimization and genetic algorithm is proposed to minimize a simplified model of the energy function of the molecule. The proposed algorithm is called Hybrid Particle Swarm Optimization and Genetic Algorithm (HPSOGA). The HPSOGA is based on three mechanisms. The first mechanism is applying the particle swarm optimization to balance between the exploration and the exploitation process in the proposed algorithm. The second mechanism is the dimensionality reduction process and the population partitioning process by dividing the population into sub-populations and applying the arithmetical crossover operator in each sub-population in order to increase the diversity of the search in the algorithm. The last mechanism is applied in order to avoid the premature convergence and avoid trapping in local minima by using the genetic mutation operator in the whole population. Before applying the proposed HPSOGA to minimize the potential energy function of the molecule size, we test it on 13 unconstrained large scale global optimization problems with size up to 1000 dimensions in order to investigate the general performance of the proposed algorithm for solving large scale global optimization problems then we test the proposed algorithm with different molecule sizes with up to 200 dimensions. The proposed algorithm is compared against the standard particle swarm optimization to solve large scale global optimization problems and 9 benchmark algorithms, in order to verify the efficiency of the proposed algorithm for solving molecules potential energy function. The numerical experiment results show that the proposed algorithm is a promising and efficient algorithm and can obtain the global minimum or near global minimum of the molecular energy function faster than the other comparative algorithms.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2016.07.008
       
  • Arc Based Ant Colony Optimization Algorithm for optimal design of
           gravitational sewer networks

    • Authors: R. Moeini; M.H. Afshar
      Pages: 207 - 223
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): R. Moeini, M.H. Afshar
      In this paper, constrained and unconstrained versions of a new formulation of Ant Colony Optimization Algorithm (ACOA) named Arc Based Ant Colony Optimization Algorithm (ABACOA) are augmented with the Tree Growing Algorithm (TGA) and used for the optimal layout and pipe size design of gravitational sewer networks. The main advantages offered by the proposed ABACOA formulation are proper definition of heuristic information, a useful component of the ant-based algorithms, and proper trade-off between the two conflicting search attributes of exploration and exploitation. In both the formulations, the TGA is used to incrementally construct feasible tree-like layouts out of the base layout. In the first formulation, unconstrained version of ABACOA is used to determine the nodal cover depths of sewer pipes while in the second formulation, a constrained version of ABACOA is used to determine the nodal cover depths of sewer pipes which satisfy the pipe slopes constraint. Three different methods of cut determination are also proposed to complete the construction of a tree-like network containing all base layout pipes, here. The proposed formulations are used to solve three test examples of different scales and the results are presented and compared with other available results in the literature. Comparison of the results shows that best results are obtained using the third cutting method in both the formulations. In addition, the results indicate the ability of the proposed methods and in particular the constrained version of ABACOA equipped with TGA to solve sewer networks design optimization problem. To be specific, the constrained version of ABACOA has been able to produce results 0.1%, 1% and 2.1% cheaper than those obtained by the unconstrained version of ABACOA for the first, second and the third test examples, respectively.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2016.03.003
       
  • MHD boundary layer flow and heat transfer in an inclined porous square
           cavity filled with nanofluids

    • Authors: Chandra Shekar Balla; Naikoti Kishan; Rama S.R. Gorla; B.J. Gireesha
      Pages: 237 - 254
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): Chandra Shekar Balla, Naikoti Kishan, Rama S.R. Gorla, B.J. Gireesha
      The present paper deals with the magnetohydrodynamic boundary layer flow of a free convection heat transfer in an inclined square cavity filled with nanofluid-saturated porous medium. The effects of different nanoparticles Cu, Al2O3, TiO2 and SiO2 are considered. The top and bottom horizontal walls of cavity are considered adiabatic, while the vertical walls are kept at constant temperatures. The governing partial differential equations are solved by finite element method of Galerkin weighted residual scheme. Numerical results are obtained for different values of the Rayleigh number, angle of inclination, magnetic field and nanofluid volume fraction. The overall investigation of variation of streamlines, isotherms and Nusselt numbers is presented graphically. To examine the accuracy, the present results are compared with the available results.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2016.02.010
       
  • Synthesis, characterization and performance of CoxNi1−xS compounds for
           application in lithium batteries

    • Authors: Atef Y. Shenouda; N. Munichandraih
      Pages: 255 - 261
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): Atef Y. Shenouda, N. Munichandraih
      This study reports a process to prepare Co x Ni1− x S (x =0, 0.25, 0.5, 0.75 and 1) samples by hydrothermal process at 250°C using stoichiometric weight ratios of raw materials. The prepared powder samples were annealed in Ar atmosphere at 450°C for 3h. The crystal structure of prepared annealed Co x Ni1− x S samples was characterized by XRD. SEM investigations were carried out explaining the morphology of these samples. Electrochemical impedance spectra (EIS) measurements, Cyclic voltammetric (CV) and galvanostatic measurements were carried out. The life cycle performance was carried out for the cells and Li/Co0.25Ni0.75S cell gave specific discharge capacities of about 330mAhg−1.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2016.06.006
       
  • Investigation on cascade multilevel inverter with symmetric, asymmetric,
           hybrid and multi-cell configurations

    • Authors: Y. Suresh; J. Venkataramanaiah; Anup Kumar Panda; C. Dhanamjayulu; P. Venugopal
      Pages: 263 - 276
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): Y. Suresh, J. Venkataramanaiah, Anup Kumar Panda, C. Dhanamjayulu, P. Venugopal
      In recent past, numerous multilevel architectures came into existence. In this background, cascaded multilevel inverter (CMLI) is the promising structure. This type of multilevel inverters synthesizes a medium voltage output based on a series connection of power cells which use standard low-voltage component configurations. This characteristic allows one to achieve high-quality output voltage and current waveforms. However, when the number of levels increases switching components and the count of dc sources are also increased. This issue became a key motivation for the present paper. The present paper is devoted to investigate different types of CMLI which use less number of switching components and dc sources and finally proposed a new version of Multi-cell based CMLI. In order to verify the proposed topology, MATLAB – simulations and hardware verifications are carried out and results are presented.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2016.09.006
       
  • Computational study of Jeffrey’s non-Newtonian fluid past a
           semi-infinite vertical plate with thermal radiation and heat
           generation/absorption

    • Authors: S. Abdul Gaffar; V. Ramachandra Prasad; E. Keshava Reddy
      Pages: 277 - 294
      Abstract: Publication date: June 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 2
      Author(s): S. Abdul Gaffar, V. Ramachandra Prasad, E. Keshava Reddy
      The nonlinear, steady state boundary layer flow, heat and mass transfer of an incompressible non-Newtonian Jeffrey’s fluid past a semi-infinite vertical plate is examined in this article. The transformed conservation equations are solved numerically subject to physically appropriate boundary conditions using a versatile, implicit finite-difference Keller box technique. The influence of a number of emerging non-dimensional parameters, namely Deborah number (De), ratio of relaxation to retardation times (λ), Buoyancy ratio parameter (N), suction/injection parameter (fw ), Radiation parameter (F), Prandtl number (Pr), Schmidt number (Sc), heat generation/absorption parameter (Δ) and dimensionless tangential coordinate (ξ) on velocity, temperature and concentration evolution in the boundary layer regime is examined in detail. Also, the effects of these parameters on surface heat transfer rate, mass transfer rate and local skin friction are investigated. This model finds applications in metallurgical materials processing, chemical engineering flow control, etc.

      PubDate: 2017-06-17T02:59:03Z
      DOI: 10.1016/j.asej.2016.09.003
       
  • Optimal operation of power system incorporating wind energy with demand
           side management

    • Authors: M.H. Alham; M. Elshahed; Doaa Khalil Ibrahim; Essam El Din Abo El Zahab
      Pages: 1 - 7
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): M.H. Alham, M. Elshahed, Doaa Khalil Ibrahim, Essam El Din Abo El Zahab
      The high penetration of the wind energy in the power systems raises some issues such as ramping and mismatch between the wind power and power demand. One of the possible solutions to these issues is the demand side management (DSM). In this paper, dynamic economic dispatch (DED) incorporating different penetration levels of wind energy and utilizing the DSM is proposed to solve the issues related to high penetration of wind energy. The effect of utilizing the DSM on the operation cost with different test cases is discussed. The General Algebraic Modeling System (GAMS) using BARON as a solver and genetic algorithm (GA) with hybrid function are used to solve the proposed DED model and a comparison between them is assessed. The proposed model is applied to a six units’ generation system to test the effectiveness of the proposed model.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.07.004
       
  • Power system security enhancement with unified power flow controller under
           multi-event contingency conditions

    • Authors: S. Ravindra; Chintalapudi V. Suresh; S. Sivanagaraju; V.C. Veera Reddy
      Pages: 9 - 28
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): S. Ravindra, Chintalapudi V. Suresh, S. Sivanagaraju, V.C. Veera Reddy
      Power system security analysis plays key role in enhancing the system security and to avoid the system collapse condition. In this paper, a novel severity function is formulated using transmission line loadings and bus voltage magnitude deviations. The proposed severity function and generation fuel cost objectives are analyzed under transmission line(s) and/or generator(s) contingency conditions. The system security under contingency conditions is analyzed using optimal power flow problem. An improved teaching learning based optimization (ITLBO) algorithm has been presented. To enhance the system security under contingency conditions in the presence of unified power flow controller (UPFC), it is necessary to identify an optimal location to install this device. Voltage source based power injection model of UPFC, incorporation procedure and optimal location identification strategy based on line overload sensitivity indexes are proposed. The entire proposed methodology is tested on standard IEEE-30 bus test system with supporting numerical and graphical results.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.07.006
       
  • Effect of using swimmer bars on the behavior of normal and high strength
           reinforced concrete beams

    • Authors: Heba A. Mohamed
      Pages: 29 - 37
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): Heba A. Mohamed
      Shear failure of RC beams is often sudden and catastrophic. The shear cracks progress rapidly without warning, and the diagonal cracks are considerably wider than the flexural cracks. In this study, two types of shear reinforcement are used, traditional stirrups and swimmer bars. Swimmer bar system is a new type of shear reinforcement defined as inclined bars welded to longitudinal top and bottom bars. High strength concrete is a more brittle material than normal strength concrete, and the cracks that form in high strength concrete will propagate more extensively than in normal strength concrete. Ten beams are tested, and the main variables investigated were two different shapes of swimmer bars in addition to traditional stirrups, number of swimmer bar planes, and compressive strength of concrete. The test results will be presented and discussed in order as deflection, ultimate loads, ultimate shear stress, cracking stress and failure modes. Moreover, shear strain is calculated.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.07.007
       
  • Application of the finite element method for investigating the dynamic
           plate loading test

    • Authors: Mohamed M. Tawfik; Yasser M. El-Mossallamy
      Pages: 39 - 49
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): Mohamed M. Tawfik, Yasser M. El-Mossallamy
      The dynamic plate loading test using the Light Falling Weight Deflectometer (LFWD) is an innovative and very simple method used for quick assessment of the field compaction quality. The basic outcome of the LFWD test is the dynamic resilience modulus of the tested soil. This paper concisely presents the state-of-the-art for the theory and applications of the LFWD test. Moreover, an attempt is made in this study to use the finite element method for simulating the LFWD test and investigating the consequent soil response. An axisymmetric model is established to simulate a realistic case study of in-situ LFWD test. Different soil models are examined for adequately simulating the soil performance, including linear elastic, Mohr–Coulomb and Hardening-Soil models. The finite element analysis is applied to investigate the factors that probably affect the LFWD results. Furthermore, an attempt to ascertain the influence depth of the LFWD is provided.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.08.011
       
  • Computational approaches for annual maximum river flow series

    • Authors: Harinarayan Tiwari; Subash Pd. Rai; Nayan Sharma; Dheeraj Kumar
      Pages: 51 - 58
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): Harinarayan Tiwari, Subash Pd. Rai, Nayan Sharma, Dheeraj Kumar
      Studies of annual peak discharge and its temporal variations are widely used in the planning and decision making process of water resources management. Very recently, soft computing techniques are gaining ground for time series analysis of hydrological events such as rainfall and runoff. In this study Artificial Neural Network (ANN) has been used in combination with wavelet to model the annual maximum flow discharge of rivers. The results of ANN-Wavelet (WANN) model indicate overall low coherence (R 2 =0.39) better than ANN (R 2 =0.31) in isolation. In the present analysis, the authors also conceded a probabilistic distributional analysis of river flow time series which has greater potential to better reflect peak flow dynamics. The results highlight that the overall performance of probability distribution models is superior to WANN model. Instead of that WANN is better than probabilistic models to find the global maxima of the series.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.07.016
       
  • Solving second order delay differential equations using direct two-point
           block method

    • Authors: Hoo Yann Seong; Zanariah Abdul Majid
      Pages: 59 - 66
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): Hoo Yann Seong, Zanariah Abdul Majid
      This paper will consider the implementation of direct two-point fourth and fifth order multistep block method in the form of Adams–Moulton method to solve second order delay differential equations (DDEs) directly without transforming the equations into system of first order DDEs. The proposed methods will compute the numerical solutions at two points simultaneously which are implemented in predictor–corrector (PECE) mode. The formulation and stability analysis of the block method are discussed. The block method will approximate the computing solutions using constant step size. Numerical results are presented to show that the proposed methods are suitable for solving second order DDEs compared with the existing methods.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.07.014
       
  • Radiation and mass transfer effects on MHD flow through porous medium past
           an exponentially accelerated inclined plate with variable temperature

    • Authors: Jyotsna Rani Pattnaik; Gouranga Charan Dash; Suprava Singh
      Pages: 67 - 75
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): Jyotsna Rani Pattnaik, Gouranga Charan Dash, Suprava Singh
      An analysis of unsteady MHD free convection flow, heat and mass transfer past an exponentially accelerated inclined plate embedded in a saturated porous medium with uniform permeability, variable temperature and concentration has been carried out. The novelty of the present study was to analyze the effect of angle of inclination on the flow phenomena in the presence of heat source/sink and destructive reaction. The Laplace transformation method has been used to solve the governing equations. The effects of the material parameters, magnetic field and the permeability of the porous medium are discussed. From the present analysis it is reported that the presence of magnetic field and porous medium prevents the flow reversal. Angle of inclination and heat source sustains a retarding effect on velocity. The present study has an immediate application in understanding the drag experienced at the heated/cooled and inclined surfaces in a seepage flow.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.08.014
       
  • Entropy analysis of convective MHD flow of third grade non-Newtonian fluid
           over a stretching sheet

    • Authors: M.M. Rashidi; S. Bagheri; E. Momoniat; N. Freidoonimehr
      Pages: 77 - 85
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): M.M. Rashidi, S. Bagheri, E. Momoniat, N. Freidoonimehr
      The purpose of this article is to study and analyze the convective flow of a third grade non-Newtonian fluid due to a linearly stretching sheet subject to a magnetic field. The dimensionless entropy generation equation is obtained by solving the reduced momentum and energy equations. The momentum and energy equations are reduced to a system of ordinary differential equations by a similarity method. The optimal homotopy analysis method (OHAM) is used to solve the resulting system of ordinary differential equations. The effects of the magnetic field, Biot number and Prandtl number on the velocity component and temperature are studied. The results show that the thermal boundary-layer thickness gets decreased with increasing the Prandtl number. In addition, Brownian motion plays an important role to improve thermal conductivity of the fluid. The main purpose of the paper is to study the effects of Reynolds number, dimensionless temperature difference, Brinkman number, Hartmann number and other physical parameters on the entropy generation. These results are analyzed and discussed.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.08.012
       
  • Effect of magnetic field on unsteady natural convective flow of a
           micropolar fluid between two vertical walls

    • Authors: Hari R. Kataria; Harshad R. Patel; Rajiv Singh
      Pages: 87 - 102
      Abstract: Publication date: March 2017
      Source:Ain Shams Engineering Journal, Volume 8, Issue 1
      Author(s): Hari R. Kataria, Harshad R. Patel, Rajiv Singh
      We study theoretically the boundary layer flow of an incompressible micropolar fluid under uniform magnetic field and motion takes place due to the buoyancy force between vertical walls. The governing unsteady boundary layer momentum, angular momentum and energy equations of micropolar fluid are nondimensionalized and solved numerically. Analytic result for steady state case is also discussed. The effects of magnetic parameter (M), vortex viscosity parameter (R), Prandtl number (Pr) and material parameter (b) on velocity, micro-rotation and Temperature profiles are discussed through several figures.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2015.08.013
       
  • Investigation and analysis of scour downstream of a spillway

    • Authors: E.A. Elnikhely
      Abstract: Publication date: Available online 2 June 2017
      Source:Ain Shams Engineering Journal
      Author(s): E.A. Elnikhely
      Local scour downstream of spillways due to hydraulic jump is considered the most complicated and tedious problems which threats the overall stability of the spillway. Throughout this paper, eighty experimental runs were carried out to investigate the effect of using cylinder blocks fixed on the back slope of the spillway on the scour hole dimensions downstream of spillway under different flow conditions. Case of smooth spillway was included to estimate the influence of the considered modifications. Experiments were performed using different diameters, lengths, and arrangements of cylinder blocks with different discharges. Data collected from the experiments were analyzed and graphically introduced. Furthermore, experimental data for smooth spillway were compared with scour formulae for other researchers. Finally simple formulae were predicted to estimate the different scour and deposition parameters. Use of concrete cylinder blocks will assist engineers in the design of spillways.

      PubDate: 2017-06-06T23:33:20Z
      DOI: 10.1016/j.asej.2017.03.008
       
  • Numerical simulation of fifth order KdV equations occurring in
           magneto-acoustic waves

    • Authors: Amit Goswami; Jagdev Singh; Devendra Kumar
      Abstract: Publication date: Available online 29 May 2017
      Source:Ain Shams Engineering Journal
      Author(s): Amit Goswami, Jagdev Singh, Devendra Kumar
      In this work, we aim to apply a numerical approach based on Homotopy perturbation transform method (HPTM) for derive the exact and approximate solutions of nonlinear fifth order KdV equations for study magneto-acoustic waves in plasma. The approach is a mixed form of the standard Laplace transform with the classical Homotopy perturbation technique. Nonlinear term can be handled with the aid of He's Polynomials. In this technique, the solution is calculated in the form of a convergent series and convergence of the HPTM solutions to the exact solutions is shown. The Homotopy perturbation transform method presents a wide applicability to handling nonlinear wave equations in science and engineering. As a novel application of HPTM, the present work shows some essential difference with the existing similar method. Several examples are provided for illustrate the simplicity and reliability of the method and highlighted the significance of this work.

      PubDate: 2017-06-02T20:24:05Z
      DOI: 10.1016/j.asej.2017.03.004
       
  • Artificial neural controller for torque ripple control and maximum power
           extraction for wind system driven by switched reluctance generator

    • Authors: Naggar Saad; Ahmed El-Sattar Mohamed Metally
      Abstract: Publication date: Available online 26 May 2017
      Source:Ain Shams Engineering Journal
      Author(s): Naggar H. Saad, Ahmed A. El-Sattar, Mohamed E. Metally
      Torque ripples and maximum power tracking form the most important problems facing Wind Energy Conversion System (WECS). This paper presents modified toque ripple minimization algorithm of four phases 8/6 poles Switched Reluctance Generator (SRG) using Artificial Neural Network (ANN) control. This control algorithm is based on optimum profiling of the generator phase currents during overlapping periods. The paper, also, introduces new Maximum Power Point Tracking (MPPT) for SRG by modifying the classical Hill Climb Searching (HCL) technique using ANN which is designed to emulate the PI controller for closed loop operation under different wind speeds. Moreover multi level diode clamped inverter is used for connecting SRG to the grid in order to reduce Total Harmonic Distortion (THD) to about 1.45% and reduce filter size. The simulation results show good agreement and support the feasibility of the proposed torque ripple minimization and MPPT techniques.

      PubDate: 2017-05-28T17:02:11Z
       
  • New switching approach for DVR using one cycle control method

    • Authors: Seyed Abbas; Taher Hosein Tahami Fard Ehsan Boloor Kashani
      Abstract: Publication date: Available online 25 May 2017
      Source:Ain Shams Engineering Journal
      Author(s): Seyed Abbas Taher, Hosein Tahami Fard, Ehsan Boloor Kashani
      One of the effective devices to eliminate voltage disturbances of sensitive loads in distribution systems is dynamic voltage restorer (DVR). In previous studies, the sinusoidal pulse width modulation (SPWM) method has been used as a switching method for DVR. However, a new switching approach called “one cycle control” (OCC) is presented in this paper for a three-phase DVR which has higher performance in dynamic and steady state operations compared to SPWM and is also simple and fixed in frequency. Moreover, this approach has few uncomplicated steps which make it suitable for practical implementation. In this study, the ability of the proposed approach is evaluated on two different types of DVR. The first DVR has fictitious dc link. In the second DVR, a battery is used in dc link. The proposed method can improve power quality disturbances such as voltage sag, voltage swell, and flicker. The ability of operating under changing parameters of load can show the robustness of the proposed approach. The simulation results obtained by OCC in six case studies were compared to the results obtained using the PWM method, revealing the higher efficiency of OCC than the PWM method.

      PubDate: 2017-05-28T17:02:11Z
       
  • Competency mapping with Sugeno fuzzy inference system for variable pay
           determination: A case study

    • Authors: Sushri Samita Rout; Bijan Bihari Misra; Sasmita Samanta
      Abstract: Publication date: Available online 24 May 2017
      Source:Ain Shams Engineering Journal
      Author(s): Sushri Samita Rout, Bijan Bihari Misra, Sasmita Samanta
      In this work we propose a novel approach for computing the variable pay/pay for performance component of employees in a technical institution based on Takagi Sugeno Kang (TSK)/Sugeno fuzzy inference system. Sugeno fuzzy inference system is an inference model based on fuzzy set theory and is known to handle MCDM (Multiple criteria decision making) problems quite efficiently. In the proposed model the Sugeno fuzzy inference system has been used to compute the variable pays of the faculties based on their individual API (Academic Performance Indicator) scores in a particular appraisal year. The model aims to overcome the pitfalls of the current forced distribution technique being used for appraisal and subsequent variable pay decisions. The performance of the proposed model has been tested with the API scores of all the faculties of the said institute. Along with that a function was used to generate random inputs in the range of API scores to extensively test the model. All the methods were implemented in MATLAB and the results were analyzed in EXCEL using the CORREL and PEARSON’s coefficient. Experimental results show that the proposed model is reliable and demonstrates significant improvement over the traditional forced distribution approach currently adopted.

      PubDate: 2017-05-28T17:02:11Z
      DOI: 10.1016/j.asej.2017.03.007
       
  • Improved bacterial foraging optimization for grid connected wind energy
           conversion system based PMSG with matrix converter

    • Authors: Naggar H. Saad; Ahmed A. El-Sattar; Mohamed E. Marei
      Abstract: Publication date: Available online 24 May 2017
      Source:Ain Shams Engineering Journal
      Author(s): Naggar H. Saad, Ahmed A. El-Sattar, Mohamed E. Marei
      This paper proposes an improved fast dynamic system for controlling Matrix Converter (MC) based on modified hysteresis current controller using optimal tuning PI controller. An improved Bacterial Foraging Optimization (BFO) technique is employed for controlling the active and reactive current components of the Permanent Magnet Synchronous Generator (PMSG) to extract the maximum power from the wind. This proposed controller has the ability to supply the grid by both active and reactive power at normal and fault conditions. Dynamic limiter is employed with the proposed improved BFO controller to control the injected reactive power to the grid during Low Voltage Ride Through (LVRT) at a range limited by MC rated current to improve the system stability. The pitch angle controller with rate limiter was implemented in the proposed controller to protect WECS from mechanical damage. The simulation results prove the validity of the proposed controller under any conditions.

      PubDate: 2017-05-28T17:02:11Z
      DOI: 10.1016/j.asej.2017.03.010
       
  • A novel control strategy for grid connected hybrid renewable energy
           systems using improved particle swarm optimization

    • Authors: Naggar H. Saad; Ahmed A. El-Sattar; Abd El-Aziz M. Mansour
      Abstract: Publication date: Available online 24 May 2017
      Source:Ain Shams Engineering Journal
      Author(s): Naggar H. Saad, Ahmed A. El-Sattar, Abd El-Aziz M. Mansour
      This paper proposes a novel hybrid centralized and distributed control of hybrid renewable energy system consisting of AC/DC micro grids. An Interlinking Converter (IC) is used to connect both sides of the micro grid systems together. Improved Particle Swarm Optimization (IPSO) which acts as a master controller is used to control the power of the sources based on IC control. Also, there are different slave controllers for 100kW photovoltaic, fuel cells and 100kW wind, which are designed to supply continuous load power. Coordination between two grids is satisfied through droop control for both AC and DC micro grids to achieve power sharing process and control of renewable energy sources supplying different loads. The model has been implemented in MATLAB/SIMULINK. The proposed controller succeeded to manage energy between micro grids under different scenarios. The control technique using IPSO strategy improves the dynamics of the hybrid system connected to the grid.

      PubDate: 2017-05-28T17:02:11Z
      DOI: 10.1016/j.asej.2017.03.009
       
  • Overlapping domain decomposition method for singularly perturbed third
           order reaction-diffusion problems

    • Authors: J. Christy Roja; A. Tamilselvan
      Abstract: Publication date: Available online 31 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): J. Christy Roja, A. Tamilselvan
      In this paper, we present an analysis of overlapping Schwarz method for singularly perturbed third order reaction-diffusion problems. The Schwarz method invokes two fine mesh subdomains and one coarse mesh subdomain. On each subdomain we use a standard finite difference operator with a uniform mesh. The numerical approximations generated from the method are shown to be almost second order uniformly convergent. Furthermore we show that for small ε , two iterations are sufficient to achieve the expected accuracy. Numerical examples are presented to support the theoretical results.

      PubDate: 2017-04-04T15:36:06Z
      DOI: 10.1016/j.asej.2016.09.018
       
  • Simulation of counter-current imbibition phenomenon in a double phase flow
           through fracture porous medium with capillary pressure

    • Authors: Hardik S. Patel; Ramakanta Meher
      Abstract: Publication date: Available online 23 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Hardik S. Patel, Ramakanta Meher
      In this paper, the counter-current imbibition phenomenon in a fracture porous media is studied and Adomian decomposition method is applied to find the saturation of wetting phase and the recovery rate of the reservoir. A simulation result is developed for the saturation of wetting phase in fracture matrix and in porous matrix for some interesting choices of parametric value to study the recovery rate of the oil reservoir with dimensionless time. This problem has a great importance in the oil recovery process.

      PubDate: 2017-03-27T21:03:02Z
      DOI: 10.1016/j.asej.2016.09.017
       
  • A systematic literature review: Refactoring for disclosing code smells in
           object oriented software

    • Authors: Satwinder Singh; Sharanpreet Kaur
      Abstract: Publication date: Available online 22 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Satwinder Singh, Sharanpreet Kaur
      Context Reusing a design pattern is not always in the favor of developers. Thus, the code starts smelling. The presence of “Code Smells” leads to more difficulties for the developers. This racket of code smells is sometimes called Anti-Patterns. Objective The paper aimed at a systematic literature review of refactoring with respect to code smells. However the review of refactoring is done in general and the identification of code smells and anti-patterns is performed in depth. Method A systematic literature survey has been performed on 238 research items that includes articles from leading Conferences, Workshops and premier journals, theses of researchers and book chapters. Results Several data sets and tools for performing refactoring have been revealed under the specified research questions. Conclusion The work done in the paper is an addition to prior systematic literature surveys. With the study of paper the attentiveness of readers about code smells and anti-patterns will be enhanced.

      PubDate: 2017-03-27T21:03:02Z
      DOI: 10.1016/j.asej.2017.03.002
       
  • Septic B-spline method for second order self-adjoint singularly perturbed
           boundary-value problems

    • Authors: Ram Kishun Lodhi; Hradyesh Kumar Mishra
      Abstract: Publication date: Available online 22 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Ram Kishun Lodhi, Hradyesh Kumar Mishra
      In the present paper, we develop a septic B-spline method for solving a self-adjoint singularly perturbed two-point boundary value problem. This method is applied directly to the numerical solution of the problems without reducing its order. The convergence analysis is also given and the method is shown to have a convergence of order six. Numerical illustrations are given at the end to demonstrate the efficiency of our method by using the MATLAB.

      PubDate: 2017-03-27T21:03:02Z
      DOI: 10.1016/j.asej.2016.09.016
       
  • Operational matrix based on Genocchi polynomials for solution of delay
           differential equations

    • Authors: Abdulnasir Isah; Chang Phang
      Abstract: Publication date: Available online 21 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Abdulnasir Isah, Chang Phang
      In this paper, we present a new simple and effective algorithm for solving generalized Pantograph equations, delay differential equations with neutral terms and delay differential system with constant and variable coefficients.The new method is based on one of the Appell polynomials, namely Genocchi polynomials. We first introduce the properties of Genocchi polynomials and employed them to construct the operational matrices of derivative. Collocation method based on this operational matrix is used. Error estimate for this scheme based on the Generalized pantograph equations is reproduced. Only few terms of Genocchi polynomials are needed to obtain very good results. Numerical examples with comparison show the simplicity, efficiency and accuracy of the method.

      PubDate: 2017-03-27T21:03:02Z
      DOI: 10.1016/j.asej.2016.09.015
       
  • Thermophoresis and Soret-Dufour on MHD mixed convection mass transfer over
           

    • Authors: Hiranmoy Mondal; Dulal Pal; Sewli Chatterjee; Precious Sibanda
      Abstract: Publication date: Available online 18 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Hiranmoy Mondal, Dulal Pal, Sewli Chatterjee, Precious Sibanda
      An analysis is presented to investigate thermophoresis and Soret-Dufour on MHD mixed convective heat and mass transfer of a semi-infinite permeable inclined flat plate in the presence of non uniform heat source/sink and chemical reaction. The governing differential equations are transformed into a set of non-linear coupled ordinary differential equations and solved using a numerical technique with appropriate boundary conditions for various physical parameters. The numerical solution for the governing nonlinear boundary value problem is based on the numerical integration scheme over the entire range of physical parameters. The effects of various physical parameters on the dimensionless velocity, temperature, and concentration profiles are depicted graphically and analyzed in detail. Favorable comparisons with previously published work on various special cases of the problem are obtained. Finally, numerical values of the physical quantities, such as local skin-friction coefficient, the local Nusselt number and the local Sherwood number are presented in tabular form.

      PubDate: 2017-03-20T18:50:19Z
      DOI: 10.1016/j.asej.2016.10.015
       
  • A multi-objective optimal sizing and siting of distributed generation
           using ant lion optimization technique

    • Authors: Mohammad Jafar Hadidian-Moghaddam; Saber Arabi-Nowdeh; Mehdi Bigdeli; Davood Azizian
      Abstract: Publication date: Available online 15 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Mohammad Jafar Hadidian-Moghaddam, Saber Arabi-Nowdeh, Mehdi Bigdeli, Davood Azizian
      In this paper, a new optimization method is proposed to solve the optimal sizing and siting problem of distributed generation (DG) in a distribution system (DS). The optimization problem is solved using a new ant lion optimizer (ALO) with considering different objectives. These objectives are reduction of purchased energy cost from upstream network (due to DGs’ power generation), reliability improvement, reduction of DGs’ application cost, reduction of DS losses and reduction of buses’ voltage deviation. This problem is solved as a multi-objective optimization (MOO) in addition of a single-objective optimization (SOO). The proposed DGs optimal sizing and siting is implemented on 33 and 69-bus IEEE networks. The obtained results show that the ALO has the best performance in extracting the solution of DGs optimal sizing and siting problem in comparison to particle swarm optimization (PSO) and genetic algorithm (GA).

      PubDate: 2017-03-16T15:18:03Z
      DOI: 10.1016/j.asej.2017.03.001
       
  • Design and implementation of BGP novel control mechanism (BGP-NCM) based
           on network performance parameters

    • Authors: M.T. Moubarak; Ashraf Diaa Elbayoumy; Mohamed Helmy Megahed
      Abstract: Publication date: Available online 9 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): M.T. Moubarak, Ashraf Diaa Elbayoumy, Mohamed Helmy Megahed
      Border Gateway Protocol (BGP) is the defecto standard routing protocol of the internet and has served as backbone technology for logical routing tasks to provide global connectivity in the world. Unfortunately, there are limitations on network performance factors such as latency or link utilization which are not used in BGP routing decisions. These limitations have a great effect on internet services, especially bandwidth sensitive application, where BGP does not automatically redistribute the traffic over different Multihomed links based on link utilization or latency. In this paper, a novel control mechanism for BGP (BGP-NCM) is proposed. BGP-NCM is a software controller which has been developed and injected in the Enterprise or internet service provider BGP multihomed network to force the traffic redistribution over the available links based on the link utilization or latency. The BGP-NCM has been developed using Python programming language and it consists of three modules which are Monitoring, Traffic Calculation and Configuration modules. BGP-NCM will keep an eye on link utilization by checking the monitoring tool log and when the link utilization reaches a predefined value, the BGP-NCM traffic calculation module will be triggered to determine the amount of traffic and corresponding IP prefix as well as the target link with available bandwidth to accommodate the redistributed traffic. Our results show that BGP-NCM solves the traffic redistribution problem without any change in both BGP protocol and running internet infrastructure.
      Graphical abstract image

      PubDate: 2017-03-16T15:18:03Z
      DOI: 10.1016/j.asej.2017.02.008
       
  • Evaluation of barley (Hordeum vulgare L.) genotypes for salinity tolerance
           under field conditions using the stress indices

    • Authors: A. Jamshidi; H.R. Javanmard
      Abstract: Publication date: Available online 9 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): A. Jamshidi, H.R. Javanmard
      Developing a suitable method for properly screening barley tolerance under salt stress is of great significance. Barley (an excellent model for the prediction of crop response to climate change) salt tolerance was investigated using stress tolerance indices. The experiments were conducted using 26 barley genotypes at two research sites, without stress (soil salinity=3dS/m) and with stress (soil salinity=14dS/m, and irrigation water of 12dS/m). Using the grain yield under non-stress and stress conditions, the salinity stress indices of barley genotypes including salinity susceptibility index (SSI, 0.68–1.12), tolerance index (TOL, 2570–11877), stress tolerance index (STI, 0.01–0.33), geometric mean productivity (GMP, 1433–7625), and mean productivity (MP, 633–6431) were determined. The ten most tolerant barley genotypes including 4Shur, Torkman, Makouei, Karoon, 5Shur, Bahman, Sahra, Torsh, Reihan and Goharjo were determined by the stress indices. The variation of the stress indices indicated that Nimruz was the most sensitive barley genotype under stress. The stress indices were highly correlated and accordingly useable for determining the relative salt tolerance of barley genotypes. The coefficients of variation were also used as the indicators of barley tolerance under salinity stress by revealing the most and the least variable traits of barley under stress. The findings are of practical significance to agricultural fields with salinity stress, resulting in their higher yield productivity.

      PubDate: 2017-03-16T15:18:03Z
      DOI: 10.1016/j.asej.2017.02.006
       
  • Numerical study on the effect of the spur dikes on sedimentation pattern

    • Authors: Abolfazl Nazari Giglou; John Alex Mccorquodale; Luca Solari
      Abstract: Publication date: Available online 8 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Abolfazl Nazari Giglou, John Alex Mccorquodale, Luca Solari
      The spur dikes are structures that usually used for flow diversion from erodible wall and they usually create a appropriate path for directing the flow, flood control, protection of external walls, and some other cases. Through modifying the hydraulic conditions and creation of smooth flow, spur dikes can decrease water erosion force and power of sediment transport. In this study, the channel and spur dike related to the Heltz Laboratory model have been simulated using Flow-3D numerical model. The RNG turbulence model has been applied for turbulence modeling. The turbulent flow field around inclined spur dike and the effect of such parameters as angle, hydraulic conditions and sedimentation pattern have been investigated. The results showed that increasing the angle of spur dike affects the length and width of sedimentation area. When angle of spur dike increases from 90 to 120deg, the width and length of the sedimentation area will increase up to about 71 and 92 percent, respectively.

      PubDate: 2017-03-09T11:15:43Z
      DOI: 10.1016/j.asej.2017.02.007
       
  • Performance analysis of bulk arrival queue with balking, optional service,
           delayed repair and multi-phase repair

    • Authors: Charan Jeet Singh; Madhu Jain; Sandeep Kaur
      Abstract: Publication date: Available online 7 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Charan Jeet Singh, Madhu Jain, Sandeep Kaur
      In this investigation, single repairable server queueing system with bulk input and state dependent rates is analyzed by considering the general distributions for the repair, delay to repair and service processes. The server is capable of rendering two stages of the service in which the first stage service is essential and the second stage service is optional. During the repair, the server has to undergo through m-different compulsory phases of the repair. To examine the steady state behavior and to obtain the various performance indices of the system, the probability generating functions of the queue size distributions are derived by using the supplementary variable technique. By setting the appropriate parameters, some special cases are discussed. The sensitivity analysis is performed by facilitating the numerical results for the suitable illustration.

      PubDate: 2017-03-09T11:15:43Z
      DOI: 10.1016/j.asej.2016.08.025
       
  • Innovating green products as a mean to alleviate poverty in Upper Egypt

    • Authors: Hamed El-Mously
      Abstract: Publication date: Available online 6 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Hamed El-Mously
      Beginning from August 2010, EGYCOM decided to devote its efforts to combat poverty in Upper Egypt. Based on the UN Human Development report for Egypt, EGYCOM found that 762 of the poorest villages are in the governorates of Assuit, Sohag and Menya in Upper Egypt. Of those 44% are in Menya alone. Poverty has alarming consequences, one of which is migration of youth to big cities or abroad in search for regular wages and better life. A team of 22 members undertook additional research and developed a point system to evaluate the poorest 10 villages in Menya governorate, and the final result pointed to the village of Al Qayat. Palm trees were recognized as an abundant unutilized resource in the village. Many households owned palm trees, and they are an important economic resource for the villagers. In addition, villagers possess a rich cultural and technical heritage, being an accumulation of centuries of their interaction with local resources for the satisfaction of their basis needs. Yet, the drastic change of life style in the village has decreased the need of palm secondary products. This, in turn, has led to the neglect of regular pruning of palm, which has resulted in the increase of danger of fire in palm gardens, as well as the infestation by the red palm weevil threatening the life of the palm. Here innovation has emerged as a necessity to rediscover those neglected palm secondary products with the purposed of alleviating poverty in the villages. New techniques and machinery have been innovated to suit the conditions of work in the village. A wide array of techniques and machining have been innovated for the transformation of palm midribs into strips and mats of regular dimensions to be used as a substitute for imported wood. In order to reach the market, it was necessary to close the loop of innovation. Here the intervention of designers was crucial. Four renounced designers have joined our endeavors by designing new marketable products from palm midrib mats using the uniqueness of palm midrib texture-in comparison with wood- as a competitive advantage. The joint synergetic interaction between the project team responsible for technology development and machine design, on one hand, and the creative product designers, on the other hand, has resulted in successful participation in international furniture and building materials exhibitions paving the route for marketing of palm midrib green products in the local and international markets.

      PubDate: 2017-03-09T11:15:43Z
      DOI: 10.1016/j.asej.2017.02.001
       
  • Design of conservative, reversible sequential logic for cost efficient
           emerging nano circuits with enhanced testability

    • Authors: Neeraj Kumar Misra; Subodh Wairya; Bibhash Sen
      Abstract: Publication date: Available online 3 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): Neeraj Kumar Misra, Subodh Wairya, Bibhash Sen
      The CMOS faces challenges related to the increment in leakage-current to power-consumption. QCA is a promising alternative to overcome these challenges successfully. On the other hand, reversible logic plays a significant role in quantum-computing. Keeping this technique in mind, a conservative-reversible flip-flops and counter are explored here which will bring QCA and reversible computing together in a single-platform. In synthesizing, a reversible-conservative-quantum-cellular-automata (R-CQCA) is proposed. The proposed D, T, JK and dual-edge master-slave flip-flops advocate an improvement of 20%, 46.6%, 50%, and 36.66% respectively than its counterpart in quantum-cost. Further, the 100% fault-coverage by stuck-fault is framed in R-CQCA, which can be useful for a tester to maintain data-integrity. Also, the R-CQCA layout is implemented in QCA, which achieve some parameters such as cell-complexity of 177, leakage-energy-dissipation of 0.1055eV, and size of 0.24µm2. Moreover, R-CQCA is better than FRG, RM, PPRG and MX-cqca regarding QCA-primitives are reported here.

      PubDate: 2017-03-03T07:39:02Z
      DOI: 10.1016/j.asej.2017.02.005
       
  • Throughflow and G-jitter effects on chaotic convection in an anisotropic
           porous medium

    • Authors: B.S. Bhadauria; Ajay Singh
      Abstract: Publication date: Available online 1 March 2017
      Source:Ain Shams Engineering Journal
      Author(s): B.S. Bhadauria, Ajay Singh
      The present article is to investigate the effect of various parameters on chaotic convection in an anisotropic porous medium under gravity modulation. For this, the problem is reduced into Lorenz system (non-autonomous) by employing truncated Galerkin expansion method. It is found that the system shows either chaotic or periodic nature for suitable values of scaled Rayleigh number. The influence of amplitude of modulation is to advance the chaotic nature in the system while that of frequency of modulation has tendency to delay the chaotic behaviour. The effects of Péclet number and anisotropic parameters on the chaotic system are also studied and found these are delay the chaotic nature. The phase portrait and time domain diagrams of the Lorenz system for suitable parametric values has been used to analysed the system. Finally, we conclude that the system has either chaotic or periodic solution depending upon the values of the parameters.

      PubDate: 2017-03-03T07:39:02Z
      DOI: 10.1016/j.asej.2016.08.024
       
  • Oppositional based grey wolf optimization algorithm for economic dispatch
           problem of power system

    • Authors: Moumita Pradhan; Provas Kumar Roy; Tandra Pal
      Abstract: Publication date: Available online 28 February 2017
      Source:Ain Shams Engineering Journal
      Author(s): Moumita Pradhan, Provas Kumar Roy, Tandra Pal
      This article proposes an efficient meta-heuristic approach, namely, oppositional grey wolf optimization (OGWO) algorithm for resolving the optimal operating strategy of economic load dispatch (ELD) problem. The proposed algorithm combines two basic concepts. Firstly, the hunting behavior and social hierarchy of grey wolves are used to search optimal solutions and secondly, oppositional concept is integrated with the grey wolf optimization (GWO) algorithm to accelerate the convergence rate of the conventional GWO algorithm. To show the performance of the proposed algorithm, it is applied on small, medium and large scale test systems for solving ELD problems of 13-unit, 40-unit and 160-unit systems. Comparative studies are carried out to scrutinize the efficiency of the proposed OGWO approach over the conventional GWO and other approaches available in the literature. The simulation results clearly suggest that the proposed OGWO approach is capable of finding better solutions in terms of computational time and fuel cost than the other techniques.

      PubDate: 2017-03-03T07:39:02Z
      DOI: 10.1016/j.asej.2016.08.023
       
  • Value engineering for canal tail irrigation water problem

    • Authors: Walaa Younes El-Nashar; Ahmed Hussien Elyamany
      Abstract: Publication date: Available online 28 February 2017
      Source:Ain Shams Engineering Journal
      Author(s): Walaa Younes El-Nashar, Ahmed Hussien Elyamany
      Shortage of irrigation water is a challenge frequently occurs at Canal Tail-end (CT). This paper uses Value Engineering (VE) methodology to find solutions of this problem. VE methodology includes collecting information about the water shortage at CT, analyze functions of canals, develop creative ideas, assess creative ideas based on evaluation criteria, obtain a short list of value alternatives, and develop value alternatives using Life Cycle Cost (LCC) and Net Present Value (NPV). Study results indicate that VE methodology is a problem solving tool that helps in finding solutions with focus on achieving the basic function of the system.

      PubDate: 2017-03-03T07:39:02Z
      DOI: 10.1016/j.asej.2017.02.004
       
  • Data hiding inside JPEG images with high resistance to steganalysis using
           a novel technique: DCT-M3

    • Authors: Abdelhamid Awad Attaby; Mona F.M. Mursi Ahmed; Abdelwahab K. Alsammak
      Abstract: Publication date: Available online 28 February 2017
      Source:Ain Shams Engineering Journal
      Author(s): Abdelhamid Awad Attaby, Mona F.M. Mursi Ahmed, Abdelwahab K. Alsammak
      Information security relies mainly upon encryption, and in some cases, steganography for an extra layer of security. Steganography is the science and art of secret communication between two sides that attempts to conceal the existence of the message. Many steganographic techniques have been proposed, all of them make statistically noticeable changes in the properties of the cover carrier particularly when the message payload is high. In this paper, we propose a new methodology of transform domain JPEG image steganography technique that provides high embedding performance while introducing minimal changes in the cover carrier image. The algorithm, named DCT-M3, uses modulus 3 of the difference between two DCT coefficients to embed two bits of the compressed form of the secret message. The proposed algorithm reduces significantly the number of changes in the cover image; the embedding capacity has been improved by 16.7% approximately while maintaining minimum detectability against blind steganalysis schemes.

      PubDate: 2017-03-03T07:39:02Z
      DOI: 10.1016/j.asej.2017.02.003
       
  • Variation of parameters method with an auxiliary parameter for initial
           value problems

    • Authors: Waseem Sikandar; Umar Khan; Naveed Ahmed; Syed Tauseef Mohyud-Din
      Abstract: Publication date: Available online 27 February 2017
      Source:Ain Shams Engineering Journal
      Author(s): Waseem Sikandar, Umar Khan, Naveed Ahmed, Syed Tauseef Mohyud-Din
      In this paper, an unknown auxiliary parameter is inserted in Variation of Parameter Method to solve Evolution and RLW equations. The proposed algorithm is very effective and is practically well suited for use in these problems. Three practical examples are given to verify the accuracy and efficiency of the developed technique. Comparison with the standard VPM is made to show the reliability and efficiency of the proposed algorithm.

      PubDate: 2017-03-03T07:39:02Z
      DOI: 10.1016/j.asej.2016.09.014
       
  • Multiobjective hybrid evolutionary approach for optimal planning of shunt
           capacitors in radial distribution systems with load models

    • Authors: K. Muthukumar; S. Jayalalitha
      Abstract: Publication date: Available online 27 February 2017
      Source:Ain Shams Engineering Journal
      Author(s): K. Muthukumar, S. Jayalalitha
      This article proposes a novel hybrid heuristic search algorithm based on Harmony search and particle artificial bee colony algorithm (HSA-PABC) for shunt capacitor placement problem. The objective function is framed to minimize power loss and to maximize voltage stability. To search for the optimal location of shunt capacitors, the combinatorial use of loss sensitivity factor and hybrid HSA-PABC algorithm is utilized. In this paper, different types of voltage dependent load models are taken into consideration to investigate their influence on the active power loss and voltage stability of the RDN. Simulation results shows that the voltage dependent load models lead to completely different solutions interms of power loss reduction, voltage stability improvement and net annual savings which are the crucial parameters in the decision process of optimal shunt capacitor placement problem. The result outcomes of the proposed hybrid algorithm outperform the results of other heuristic techniques in the literature.

      PubDate: 2017-03-03T07:39:02Z
      DOI: 10.1016/j.asej.2017.02.002
       
  • Impact of asymmetric lamp positioning on the performance of a
           closed-conduit UV reactor

    • Authors: Tipu Sultan; Zeshan Ahmad; Zahid Anwar; Muhammad Shahzad Khurram
      Abstract: Publication date: Available online 16 February 2017
      Source:Ain Shams Engineering Journal
      Author(s): Tipu Sultan, Zeshan Ahmad, Zahid Anwar, Muhammad Shahzad Khurram
      Computational fluid dynamics (CFD) analyses for the performance improvement of a closed-conduit ultraviolet (UV) reactor were performed by changing the lamp positions from symmetric to asymmetric. The asymmetric lamp positioning can be useful for UV reactor design and optimization. This goal was achieved by incorporating the two performance factors, namely reduction equivalent dose (RED) and system dose performance. Four cases were carried out for asymmetric lamp positioning within the UV reactor chamber and each case consisted of four UV lamps that were simulated once symmetrically and four times asymmetrically. The results of the four asymmetric cases were compared with the symmetric one. Moreover, these results were evaluated by using CFD simulations of a closed-conduit UV reactor. The fluence rate model, UVCalc3D was employed to validate the simulations results. The simulation results provide detailed information about the dose distribution, pathogen track modeling and RED. The RED value was increased by approximately 15% by using UVCalc3D fluence rate model. Additionally, the asymmetric lamp positioning of the UV lamps had more than 50% of the pathogens received a better and a higher UV dose than in the symmetric case. Consequently, the system dose performance was improved by asymmetric lamp positioning. It was concluded that the performance parameters (higher RED and system dose performance) were improved by using asymmetric lamp positioning.

      PubDate: 2017-02-24T01:46:18Z
      DOI: 10.1016/j.asej.2016.08.022
       
 
 
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