SPEKTRA Volume 7 issue 3 contains five papers: 1) Design A Monitoring System of A Single-Phase Electricity Meter Based on The Internet of Things; 2) Impact Profile of Enso and Dipole Mode on Rainfall as Anticipation of Hydrometeorological Disasters in The Province of South Sumatra; 3) Fabrication of Plastic Scintillator Using Polystyrene Matrix Based; 4) The Density Functional Theory Study of Li-Ion Diffusion in Na-Doped Li4Ti5O12 as Lithium-Ion Battery Anode; and 5) Magnetic Field-Dependent Electric Current on A Periodic POLY(DA)-POLY(DT) DNA Molecule Structure.
E-ISSN 2541-3392 P-ISSN 2541-3384 
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