Density Profiles, Energy, and Oscillation Strength of a Quantum Dot in Two Dimensions with a Harmonic Oscillator External Potential using an Orbital-free Energy Functional Based on Thomas–Fermi Theory - Suhufa Alfarisa; Department of Physics, Universiti Pendidikan Sultan Idris, Tanjung Malim, Perak 35900, Malaysia (Directorate of Research and Community Engagement, Universitas Indonesia, 2016)