We study the sunspot activity in relation to spotless days (SLDs) during descending phase of solar cycles 11–24 predict amplitude cycle 25. For this purpose, addition SLD, we also consider geomagnetic (aa index) a given cycle. A very strong correlation SLD (0.68) and aa index (0.86) with maximum next has been estimated. The empirical relationship led us deduce 25 be 99.13± 14.97 104.23± 17.35 u...

Karthik Ramani Professor Mem. ASME Purdue Research and Education Center for Information Systems in Engineering (PRECISE), Purdue University, West Lafayette, IN 47907-2024; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-2024; School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907-2024 e-mail: [email protected] Developing Engineer...

Aluminium alloy (AA2024-T4) is a material commonly used in the aerospace industry, where it forms part of fuselage aircraft and spacecraft thanks to its good machinability strength/weight ratio. These characteristics allowed be applied construction structure pilot plant produce biological extracts nano-encapsulated bioproducts for phytosanitary control diseases associated with microorganisms cr...

The inhibition mechanism of sodium oleate (C17H33COONa) for pitting corrosion of aluminum alloy (AA) 2024 in 0.1 mol L NaCl solution was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscopy with energy dispersive spectrometer (SEM-EDS) and X-ray photoelectron spectroscopy (XPS). C17H33COONa showed good inhibition effect on u...