SPEKTRA Volume 3 issue 1 contains 9 papers: 1) Moisture Absorption And FTIR Characteristic Of Tapioca Starch Biocomposite Reinforced Dragon Fruit Root Fiber (Hylocereus Polyrhizus), 2) Integrated Avo, Elastic Seismic Inversion And Petrophysical Analysis For Reservoir Characterization: A Case Study Of Gas Field, South Sumatera Basin, 3) Analysis Of Procimate On The Charcoal Bricket Agricultural Waste, 4) Analysis Of The Influence Of Gold Nanoparticle Addition To Photoluminescence Emission Intensity And Decay Time Of 618-Cdse Quantum Dots, 5) Pembuatan Graft Tulang Dengan Proses Ekstraksi Senyawa Hidroksiapatit Dari Tulang Korteks Sapi, 6) Greeness Analysis Of Forest In Mining Area Of Sawahlunto Using Ndvi Method Based On Landsat Imageries In 2006-2016, 7) Karakterisasi Kelistrikan Air Payau Dan Air Sungai Sebagai Bahan Elektrolit, 8) Study Of Nylon Membrane As A Filter For Clarification Of Sugarcane Juice, 9) Properti Mekanik Tarik Baja Wire O 3.2 Mm Dan Pc Bar O 7.1 Mm Sebagai Tulangan Pada Tiang Pancang Beton Pratekan Spun Pile.