for Journals by Title or ISSN
for Articles by Keywords
help

Publisher: Elsevier   (Total: 3043 journals)

 A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

        1 2 3 4 5 6 7 8 | Last   [Sort by number of followers]   [Restore default list]

Showing 1 - 200 of 3043 Journals sorted alphabetically
AASRI Procedia     Open Access   (Followers: 15)
Academic Pediatrics     Hybrid Journal   (Followers: 20, SJR: 1.402, h-index: 51)
Academic Radiology     Hybrid Journal   (Followers: 18, SJR: 1.008, h-index: 75)
Accident Analysis & Prevention     Partially Free   (Followers: 83, 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: 331, 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   (Followers: 1)
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: 211, 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: 23, SJR: 1.365, h-index: 73)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 6, 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: 8, SJR: 1.039, h-index: 5)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 128, 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: 22, 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: 10, 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: 41, 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: 47, SJR: 0.674, h-index: 38)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 15)
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: 11)
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: 21, 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: 25)
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: 35, 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: 5)
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: 6, 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: 24, 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: 60)
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: 343, 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: 7, SJR: 0.823, h-index: 27)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 30, 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: 8, SJR: 3.289, h-index: 78)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 405, 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: 53, 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: 9, 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: 4, 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: 7, SJR: 0.158, h-index: 9)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 48, 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: 48, SJR: 3.157, h-index: 153)
American J. of Cardiology     Hybrid Journal   (Followers: 45, SJR: 2.063, h-index: 186)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 38, 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: 16, SJR: 1.653, h-index: 93)
American J. of Human Genetics     Hybrid Journal   (Followers: 31, 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: 33, SJR: 2.313, h-index: 172)
American J. of Medicine     Hybrid Journal   (Followers: 46, 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: 191, 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: 3)
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: 26, 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: 34, 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: 55, SJR: 0.124, h-index: 9)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 10)
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: 162, 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: 11)
Anesthésie & Réanimation     Full-text available via subscription   (Followers: 1)
Anesthesiology Clinics     Full-text available via subscription   (Followers: 22, 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: 157, 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   (Followers: 1, 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)

        1 2 3 4 5 6 7 8 | Last   [Sort by number of followers]   [Restore default list]

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  [3043 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
       
  • About Kepler’s Third Law on fractal-time spaces

    • Authors: Alireza K. Golmankhaneh
      Abstract: Publication date: Available online 2 August 2017
      Source:Ain Shams Engineering Journal
      Author(s): Alireza K. Golmankhaneh
      In this paper, a mathematical model for fractal-time space is given involving F α -calculus. Differential equations corresponding of the free fall motion and simple harmonic oscillator on fractal-time space are given and solved. Moreover, using scale transformation and invariant properties of physical laws we obtained the generalized Kepler’s Third Law of motion on fractal-time space.

      PubDate: 2017-08-03T10:24:10Z
      DOI: 10.1016/j.asej.2017.06.005
       
  • A design of Microstrip Patch Antenna using hybrid fractal slot for
           wideband applications

    • Authors: Narinder Sharma; Vipul Sharma
      Abstract: Publication date: Available online 22 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Narinder Sharma, Vipul Sharma
      The paper presents a design of Microstrip Patch Antenna (MPA) using hybrid fractal slot (Koch-Minkowski and Koch-Koch) along with partial ground plane for wideband applications. The length of partial ground plane is varied to optimize the bandwidth and gain of antenna. It has been observed that the ground plane length 8mm exhibits best result in terms of bandwidth and gain. The MPA with Koch-Minkowski slot depicts 2260MHz bandwidth, 6.1dB gain and two resonant frequencies 2.47GHz and 8.92GHz whereas with Koch-Koch slot it reports 2440GHz bandwidth, 5.62dB gain, and resonant frequencies 2.77GHz and 8.62GHz. The proposed antennas are fabricated and measured bandwidth for Koch-Minkowski slot is 3326MHz and for the Koch-Koch slot is 3237MHz. The simulated results of proposed antennas are compared with measured results and observed the reasonable agreement with each other.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.05.008
       
  • Sentiment analysis in Arabic: A review of the literature

    • Authors: Naaima Boudad; Rdouan Faizi; Rachid Oulad Haj Thami; Raddouane Chiheb
      Abstract: Publication date: Available online 21 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Naaima Boudad, Rdouan Faizi, Rachid Oulad Haj Thami, Raddouane Chiheb
      Within the last couple of years, Sentiment Analysis in Arabic has gained a considerable interest from the research community. In this respect, the objective of this paper is to provide a review of the major works that have dealt with this research area in this language. A thorough investigation of the available literature revealed that the works were mainly concentrated on dealing with specific Sentiment Analysis tasks. To this end, they used three different approaches, namely supervised, unsupervised and hybrid. The results that these studies achieved are interesting but divergent. This divergence is relatively due to the type of approach opted for, the task that is being analysed as well as to the specificities and intricacies of the Arabic variety understudy.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.04.007
       
  • Bearing fault detection in a 3 phase induction motor using stator current
           frequency spectral subtraction with various wavelet decomposition
           techniques

    • Authors: K.C. Deekshit Kompella; Mannam Venu Gopala Rao; Rayapudi Srinivasa Rao
      Abstract: Publication date: Available online 14 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): K.C. Deekshit Kompella, Mannam Venu Gopala Rao, Rayapudi Srinivasa Rao
      Induction motors consumes 90% of total power consumed by industries due to large scale utilisation. Even though these motors are rugged in structure, they often face unexpected failure due to long usage without maintenance. Bearing failure is a major problem among various faults, which cause catastrophic damage to machine when unnoticed at incipient stage. So the bearing faults in induction machines should be continuously monitored. Motor current signature analysis (MCSA) has become popular for detection and localisation of these faults and has attracted concentration of many researchers. In this paper stator current is monitored by means of frequency spectral subtraction using various wavelet transforms to suppress dominant components. The spectral subtraction using discrete wavelet transform (DWT), stationary wavelet transform (SWT) and wavelet packet decomposition (WPD) is performed and a comparative analysis is carried out by means of different fault indexing parameters. The proposed topology is examined using 2.2kW induction machine test bed.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.06.002
       
  • Effect of soil-foundation-structure interaction on the seismic response of
           wind turbines

    • Authors: Sam Austin; Sukhvarsh Jerath
      Abstract: Publication date: Available online 14 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Sam Austin, Sukhvarsh Jerath
      Soil-foundation-structure interaction can affect the seismic response of wind turbines. This paper studies the effects of soil-foundation-structure interaction on the seismic response of 65kW, 1MW, and 2MW horizontal-axis wind turbines with truncated cone steel towers. Four types of foundations with frequency-based design were analyzed, including spread foundation, mono pile, pile group with cap, and anchored spread foundation. Soil is modeled both implicitly (subgrade reaction modulus) and explicitly. The finite element model developed using the ANSYS program was first validated using experimental data. Numerical models are then analyzed in both frequency and time domains using the Block Lanczos and generalized HHT-α formulations. Recommendations were given to simplify the soil-foundation-structure interaction analysis of wind turbines subjected to seismic loading.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.05.007
       
  • Understanding the behavior of RTD-loaded NMOS inverter through
           compact-form analysis

    • Authors: Sherif M. Sharroush
      Abstract: Publication date: Available online 14 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Sherif M. Sharroush
      Resonant-tunneling diodes (RTDs) find a wide variety of applications in oscillators, digital circuits, and latches due to their reduced circuit complexity, low power, and high speed. Since the inverter is the main building block in digital design, in this paper, the analysis of the RTD-loaded NMOS inverter is addressed quantitatively with its static and dynamic characteristics investigated and compared with that of the conventional static CMOS inverter. Specifically, compact-form expressions are derived for the critical points of the voltage-transfer characteristics (VTC), the low-to-high, and the high-to-low propagation delays along with the fan-out. Also, the static- and dynamic–power consumption are investigated and equations are derived for them. The results obtained from this analysis can be generalized to RTD-MOS logic-circuit family in which the pull-down network contains properly connected and appropriately sized NMOS transistors and the pull-up network is the RTD device. The results of the quantitative analysis are discussed and verified by comparison with the simulation results using the Berkeley predictive-technology model (BPTM) of the 45nm CMOS technology with a power-supply voltage of 1V.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.06.001
       
  • Condition monitoring of wind turbine for rotor fault detection under non
           stationary conditions

    • Authors: Himani; Ratna Dahiya
      Abstract: Publication date: Available online 14 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Himani, Ratna Dahiya
      Condition monitoring of Wind Turbine based induction generators still faces challenges due to their operation in harsh and aggressive environments. The detection of anomalies at an initial stage is necessary for reducing the downtime of Wind Turbines. Depending on wind speed, the wind turbine generator operates continuously in non-stationary conditions. Under non-stationary conditions, the rotor fault frequency components present at generator output spreads out on bandwidth proportional to the speed which complicates its detectability. Therefore, this paper proposes a potential approach based on the use of wavelet analysis for diagnosing rotor eccentricity fault using WTG electrical signals. Its effectiveness under speed and load varying conditions is validated by experiments on a wind turbine condition monitoring test rig. The effectiveness of the setup was benchmarked with already proven WT test rigs.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.04.002
       
  • Numerical simulation of scour and flow field for different arrangements of
           two piers using SSIIM model

    • Authors: Amirreza Hamidi; Seyed Mostafa Siadatmousavi
      Abstract: Publication date: Available online 13 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Amirreza Hamidi, Seyed Mostafa Siadatmousavi
      Scour around bridge piers in the flow is an inevitable issue. In this study, the numerical model SSIIM was used to simulate both the flow field and scour pattern around side by side piers. Both k – ɛ and k – ω turbulence models were employed to solve the eddy viscosity of flow equations and their performances were evaluated. Temporal investigation of the higher accurate turbulence model were presented. Moreover, the model was skill-assessed for different pile spacing ( G / D ) in side by side piers and several angles of piers (α) in staggered arrangements and their numerical results were obtained. Although model was successful in reproducing the scour depth in front of piers for side by side piers, it overestimated the bed scour depth between the piles. Furthermore, in the staggered arrangements, the numerical model underestimated the scour depth in front piles while good agreements were achieved between the piers in different angles of attack.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.03.012
       
  • NERC’s control performance standards based load frequency controller for
           a multi area deregulated power system with ANFIS approach

    • Authors: Abhijith Pappachen; A. Peer Fathima
      Abstract: Publication date: Available online 13 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Abhijith Pappachen, A. Peer Fathima
      This paper presents the design of a North American Reliability Council (NERC) standards BAL-001-2 based Adaptive Neuro-Fuzzy Interface System (ANFIS) controller for multi-area deregulated power system under different contract scenarios. The proposed controller is tested on the Indian regional grid system and its control performance standards are compared with the conventional PID controller and ANFIS controller. The major objectives are (i) To find a suitable control for mitigating the diverse LFC problems in a deregulated power system (ii) to comply with the NERC control performance standards which are CPS1, CPS2 and BAAL, and (iii) to reduce the wear and tear of the generating units. Dynamic modelling of controllers, test system and simulation studies are performed using MATLAB/Simulink environment. The simulation results validate that the NERC standards based ANFIS controller is one of the best controller for the four area Indian regional grid under deregulated environment.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.05.006
       
  • Managing risks of the Grand Ethiopian Renaissance Dam on Egypt

    • Authors: Walaa Y. El-Nashar; Ahmed H. Elyamany
      Abstract: Publication date: Available online 12 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Walaa Y. El-Nashar, Ahmed H. Elyamany
      Egypt depends on the Nile River to secure 95% of the water needed for different purposes as drinking, household uses, agriculture, fishing source, water transportation, tourism, electricity generation from the High Dam and industry. Although, the Grand Ethiopian Renaissance Dam (GERD) is essential to Ethiopia’s development, many research pointed out its negative impact on Egypt. Although previous researches addressed the problem of GERD using stochastic data, they used deterministic methods. This paper aims to use a stochastic method to assess risks of GERD on Egypt, and propose strategies to mitigate these risks. Management actions and policies are proposed to manage fresh water resources and mitigate GERD risks. The study concluded that the expected amount of saved water using proposed strategies exceeds the expected losses caused by GERD by 12.1Billionm3. Adopting the suggested strategies could reduce or eliminate the impact of GERD on Egypt.

      PubDate: 2017-07-24T00:31:35Z
      DOI: 10.1016/j.asej.2017.06.004
       
  • Study of nanoparticles deposition in a human upper airway model using a
           dynamic turbulent Schmidt number

    • Authors: Ehab M. Mina; Ghader Ghorbaniasl; Chris Lacor
      Abstract: Publication date: Available online 12 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Ehab M. Mina, Ghader Ghorbaniasl, Chris Lacor
      In this paper, the nanoparticles deposition in the upper portion of the human respiratory system is studied by using a dynamic turbulent Schmidt number. The flow and particle governing equations are solved using large eddy simulation (LES) with a localized dynamic subgrid scale closure of the residual stress tensor and the scalar flux term. The flow solution and the particle transport are dynamically coupled and thus, the turbulent momentum and mass diffusivity are calculated from the resolved flow and particle concentration fields. The methodology is applied to an extrathoracic oral airway model for several particle diameters ranging from 10nm to 52nm at a breathing rate of 30L/min. The results are compared to the previously published RANS and experimental data. It is observed that the current methodology improves the quality of results for flow and particle deposition considerably. It is also noticed that the turbulent Schmidt number is quite different from its typically assumed values.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.05.002
       
  • Linear free vibration of micro-/nano-plates with cut-out in thermal
           environment via modified couple stress theory and Ritz method

    • Authors: Sima Ziaee
      Abstract: Publication date: Available online 8 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Sima Ziaee
      This article aims to study the natural frequency of defective micro-/nano-plates because not only the existence of cut-outs in plates may be essential on the basis of their desired functionality but also the resonant frequency can be changed by cut-outs. In this study, the modified couple stress theory is combined with Kirchhoff thin plate hypothesis to incorporate size effect to classical plate theory. The Rayleigh-Ritz method is employed to derive discrete equations of motion which yields eigenvalue problem. In the ‘numerical results’ section, the effects of different boundary conditions, location of the cut-out, side-length to thickness ratio and a rise in the temperature on dimensionless fundamental frequency of polysilicon micro-plates are studied. Results demonstrate that the natural frequency of micro-plate, the cut out of which is far from the plate center is more than that of micro-plate with a square hole close to the plate center.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.05.003
       
  • Nanoparticles as additive in biodiesel on the working characteristics of a
           DI diesel engine

    • Authors: Prabu
      Abstract: Publication date: Available online 8 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): A. Prabu
      This experimental work investigates the performance, combustion and emission characteristics of a single cylinder direct injection (DI) diesel engine with three fuel series: biodiesel–diesel (B20), biodiesel–diesel–nanoparticles (B20A30C30) and biodiesel–nanoparticles (B100A30C30). The nanoparticles such as Alumina (Al2O3) and Cerium oxide (CeO2) of each 30ppm are mixed with the fuel blends by means of an ultrasonicator, to attain uniform suspension. Owing to the higher surface area/volume ratio characteristics of nanoparticles, the degree of mixing and chemical reactivity are enhanced during the combustion, attaining better performance, combustion and emission attributes of the diesel engine. The brake thermal efficiency of the engine for the nanoparticles dispersed test fuel (B20A30C30) significantly improved by 12%, succeeded by 30% reduction in NO emission, 60% reduction in carbon monoxide emission, 44% reduction in hydrocarbon emission and 38% reduction in smoke emission, compared to that of B100.

      PubDate: 2017-07-12T17:50:03Z
       
  • Design of 10T full adder cell for ultralow-power applications

    • Authors: Vishesh Dokania; Richa Verma; Manisha Guduri; Aminul Islam
      Abstract: Publication date: Available online 8 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Vishesh Dokania, Richa Verma, Manisha Guduri, Aminul Islam
      This research paper performs symmetrical transient response analysis of FO4 inverter logic gate at 16-nm technology node. It is observed that symmetry is obtained at the aspect ratio (β) is equal to 3.52. With this β ratio, minimum energy point is investigated and found to be 0.15V. At this minimum energy point, this research paper proposes an ultralow-power 10T 1-bit full adder circuit at 16-nm technology node in subthreshold region for energy constraint applications. It exhibits superior performance in terms of design metrics like propagation delay, average power, leakage power and energy at optimum supply voltage i.e., at 0.15V. The proposed design achieves 1.81×, 3.39×, 2.25×, and 6.12× improvement in propagation delay, average power dissipation, leakage power dissipation and energy compared to conventional 1-bit full adder circuit. The proposed design exhibits 1.02× improvement in average power variability.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.05.004
       
  • Three-dimensional flow of Jeffrey fluid between a rotating and stationary
           disks with suction

    • Authors: P. Maninaga Kumar; A. Kavitha
      Abstract: Publication date: Available online 6 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): P. Maninaga Kumar, A. Kavitha
      A three-dimensional steady flow of an incompressible Jeffrey fluid bounded by two parallel circular disks, one rotating and other stationary is examined with uniform suction at the stationary disk. Solutions for the governing equations are obtained applying “Power series method”. The velocity distributions, pressure coefficient and skin frictions are obtained which in turn are compared with assumptions of creeping flow solutions. The velocity distribution and pressure coefficient are discussed graphically. We found that the radial velocity increases and axial velocity decreases when Jeffrey parameter is increased.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.04.003
       
  • Prediction of fatigue crack initiation life in railheads using finite
           element analysis

    • Authors: H.M. El-sayed; M. Lotfy; H.N. El-din Zohny; H.S. Riad
      Abstract: Publication date: Available online 6 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): H.M. El-sayed, M. Lotfy, H.N. El-din Zohny, H.S. Riad
      The current study introduced a numerical procedure to study fatigue crack initiation life in railheads. It was mainly performed by a three-dimensional (3D) explicit finite element (FE) model that accounts for bending stresses due to global dynamic response of railway track and local stresses due to wheel-rail contact loads. The results obtained from FE analysis were combined with the critical plane approach and multiaxial low cyclic fatigue mode to predict crack orientation and fatigue crack initiation life. This model was applied to a case study in the first line of Greater Cairo Underground Metro (GCUM) in Egypt. The advantages of the proposed model are that it can represent realistic wheel-rail contact geometry and non-linearity of material behavior together with dynamic response and cyclic loading. A good agreement of cracks orientations and locations of the field observations with the predicted ones based on FE results was achieved.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.06.003
       
  • Propagation of longitudinal viscoelastic stress waves in a fluid saturated
           Voigt porous medium

    • Authors: Ahmad Barzkar; Hojatollah Adibi
      Abstract: Publication date: Available online 6 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Ahmad Barzkar, Hojatollah Adibi
      This paper is concerned with giving a simple mathematical model on the propagation of longitudinal stress waves in a Voigt viscoelastic porous media. This model is congruent with the Frankel-Biot theory and describes the differences between vibrations of solid and liquid parts of porous medium. Furthermore, this model shows that there is a critical value of frequency that depends on the relaxation coefficient, and by this critical frequency value, stress waves are divided into two low and high frequency ranges. It is also demonstrated that behavior of stress waves differs between these two different ranges. It is normally expected that increasing attenuation yields to decreased phase velocity, but contrary to our expectation, in the propagation of slow waves in the low frequency range, increasing attenuation leads to increased phase velocity. In the high frequency range this holds true regarding the propagation of both fast and slow waves.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.03.011
       
  • Experimental and numerical investigations of the Laplacian and Poissonian
           field in asymmetric multiple-electrode systems for electrostatic
           separation processes

    • Authors: Mohamed A. Abouelatta; Abd-Elhadi R. Salama
      Abstract: Publication date: Available online 5 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Mohamed A. Abouelatta, Abd-Elhadi R. Salama
      The paper presents an experimental measurements and numerical computations of the electric field in Laplacian field model as well as Poissonian field model for various asymmetric multiple-electrode configurations prepared to electrostatic separation processes. The asymmetric multiple-electrode systems utilize additional cylindrical rods and/or L-plates connected at constant or floating potential, as in practical applications. The geometries include a cluster of spherical/cylindrical conducting particles uniformly distributed and simultaneously in contact with the ground plate. The charge simulation method integrated with genetic algorithm and method of characteristics is employed for numerical computation and analysis of the electric field in the presented models. Neglecting Deutch’s assumption, the numerical technique is applied to solve Laplace's equation or Poisson's equation with the current-continuity relation. Influence of the cluster of spherical/cylindrical particles on the electric field distribution on the ground plate surface, and its acquired charged, is established. I-V characteristics and the spatial distributions of current density and electric field are evaluated and assessed. The experimental results were found to be in a good agreement with analytical values.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.05.005
       
  • Comparison of Lagrange multipliers for telegraph equations

    • Authors: Muhammad Hamid; Muhammad Usman; Tamour Zubair; Syed Tauseef Mohyud-Din
      Abstract: Publication date: Available online 5 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Muhammad Hamid, Muhammad Usman, Tamour Zubair, Syed Tauseef Mohyud-Din
      In this paper, we likewise calculate exact langrage multiplier and it progressively connects to the definite results of telegraph equations. This study witnesses the advantages of Exact Lagrange multipliers and their coupling with Variational Iteration Method. Computational work reflects that use of exact Lagrange multipliers reduces the computational work to a tangible level and also increase the level of accuracy. Moreover, exact Lagrange multiplier reduce the successive application of integral operator and are more user friendly.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2016.08.002
       
  • Properties of concrete incorporating locally produced Portland limestone
           cement

    • Authors: Fatma Shaker; Ahmed Rashad; Mohamed Allam
      Abstract: Publication date: Available online 5 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Fatma Shaker, Ahmed Rashad, Mohamed Allam
      Blended cements are increasingly being used in concrete to reduce the amount of clinker in the cement, thus achieving both economic and environmental gains. The use of limestone as a component of Portland cement is now common practice worldwide. Reducing the amount of cement clinker with limestone additions is considered a highly efficient way of saving natural resources, saving energy and lowering the carbon dioxide emissions. The main objective of this research is to investigate the effect of using locally produced Portland limestone cement (PLC) on the concrete characteristics. Tests determining the fresh, hardened and durability properties of concrete were conducted on PLC concrete specimens and then compared to similar results of concrete made with Ordinary Portland cement. This investigation concluded that concrete made with CEM II (A-L) accomplished competitive results with OPC CEM I 42.5 concrete. Furthermore, all PLC concretes achieved lower water permeability compared to OPC concretes.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.04.005
       
  • Stress-dependent consolidation characteristics of marine clay in the
           Northern Arabian Gulf

    • Authors: Tamer Elkateb
      Abstract: Publication date: Available online 4 July 2017
      Source:Ain Shams Engineering Journal
      Author(s): Tamer Elkateb
      The main objective of this paper is to study the variation of the coefficient of consolidation (Cv) with stress level for the marine clay in the Northern Arabian Gulf. Undisturbed samples were collected from three sites and laboratory-tested using the conventional Oedometer test. The variation of permeability with applied stress was expressed in terms of the Permeability Change Index. The Coefficient of Consolidation Change Index was introduced as a new parameter to quantify the change in Cv with stress level. Region-specific correlations were developed between these two indices and the Liquid Limit. The uncertainty in these correlations was quantified using statistical techniques and was found to be higher in the case of Cv. Accordingly, risk-based correction factors were introduced based on the target probability of unsatisfactory performance. Finally, a simplified methodology was proposed to estimate the stress-dependent Cv in the absence of site-specific consolidation tests.

      PubDate: 2017-07-12T17:50:03Z
      DOI: 10.1016/j.asej.2017.05.001
       
  • Innovative understanding of the duality confusion, the photovoltaic and
           magnetocaloric effects

    • Authors: Salama Abdelhady
      Abstract: Publication date: Available online 24 June 2017
      Source:Ain Shams Engineering Journal
      Author(s): Salama Abdelhady
      Innovation in engineering requires clear understanding of physics of the concerned phenomena in any engineering application. This article gives clear scientific answers of two disturbing questions concerning fundamental phenomena in any electromagnetic system: “Is the light a flow of waves or particles'” and “Is the electric current a flow of particles or waves'” Such answers solve a puzzle in physics literature called the duality confusion and lead to innovative understandings of two interesting phenomena; the photovoltaic and magnetocaloric effects. Having such innovative understanding, it was possible to introduce in this paper verified concepts to robust designs of multijunction solar cells, optical fibers and magnetocaloric refrigerators. It was also possible to introduce a universal system of units that deletes redundancies in the SI system of units. At the end; it was shown that the results of Faraday’s experiment, known as Faraday’s effect, represent a proof of the introduced innovative understanding.

      PubDate: 2017-07-02T23:51:08Z
      DOI: 10.1016/j.asej.2017.03.006
       
  • 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
       
  • 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
       
  • 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
       
 
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
 
Home (Search)
Subjects A-Z
Publishers A-Z
Customise
APIs
Your IP address: 54.196.105.189
 
About JournalTOCs
API
Help
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-2016