Modeling the Direct Transition to Turbulence -- Dynamical Systems and the Transition to Turbulence -- Nonlinear Solutions of Simple Plane Shear Layers with and without a System Rotation -- Co-Supporting Cycle: Sustaining Mechanism of Large-Scale Structures and Near-Wall Structures in Channel Flow Turbulence -- Transition Threshold and the Self-Sustaining Process -- Turbulent-Laminar Patterns in Plane Couette Flow -- Subcritical Turbulent Transition in Rotating and Curved Shear Flows -- The Karhunen-Loève Decomposition of the Autonomous Minimal Flow Unit -- Coherent States in Transitional Pipe Flow -- Instability, Transition and Turbulence in Plane Couette Flow with System Rotation -- Transition to Versus from Turbulence in Subcritical Couette Flows -- Transition to Turbulence in Pipe Flow -- Threshold Amplitudes in Subcritical Shear Flows -- Non-Linear Optimal Perturbations in Subcritical Instabilities -- A Bypass Scenario of Laminarturbulent Transition in the Wind-Driven Free-Surface Boundary Layer -- Viscoelastic Nonlinear Traveling Waves and Drag Reduction in Plane Poiseuille Flow -- Subcritical Instabilities in Plane Couette Flow of Visco-Elastic Fluids.