13 June Thesis defence Department of Physics Dissertation by Dongwon Kim PhD thesis: Searches for New Physics in the Top and Higgs Sectors - Electroweak ttWj Production and New Bosonic Resonances in the ATLAS Experiment Department of Physics Dissertation by Dongwon Kim PhD thesis: Searches for New Physics in the Top and Higgs Sectors - Electroweak ttWj Production and New Bosonic Resonances in the ATLAS Experiment