GUEST EDITORS GUEST EDITORS Dr. Alessandro RuggieroProfessor,University of Salerno, Italy Dr Jitendra Kumar KatiyarChitkara UniversityPunjab, India Dr. B Sridhar Babu Professor, Malla Reddy Engineering College, Hyderabad, India Prof. Esther AkinlabiProfessor of Mechanical EngineeringDeputy Faculty Pro Vice Chancellor for Research Northumbria University,Newcastle, United Kingdom. Professor Dr Mohmd Hazi AzamathullaProfessorUniversity of west indies, Trinidad Dr. S Uday BhaskarProfessorMalla Reddy Engineering CollegeHyderabad, Telangana, India.