for Unmanned Aerial Vehicles.
Towards enabling a UAV to autonomously sense and avoid moving obstacles, this thesis makes the following contributions. Initially, an image-based reactive motion planner is developed for a quadrotor to avoid a fast approaching obstacle. Furthermore, A Dubin’s curve based geometry method is developed as a global path planner for a fixed-wing UAV to avoid collisions with aircraft. The image-based method is unable to produce an optimal path and the geometry method uses a simplified UAV model. To compensate
these two disadvantages, a series of algorithms built upon the Closed-Loop Rapid Exploratory Random Tree are developed as global path planners to generate collision avoidance paths in real time. The algorithms are validated in Software-In-the-Loop (SITL) and Hardware-In-the-Loop (HIL) simulations using a fixed-wing UAV model and in real flight experiments using quadrotors. It is observed that the algorithm enables a UAV to avoid moving obstacles approaching to it with different directions and speeds.
Cosplay, or the act of dressing up as a character, is a hobby that has become increasingly popular over the last several decades. Since its conception in 1939, the practice of cosplaying has always been heavily tied to that of conventions. Until 2019 these conventions were utilized by cosplayers to showcase their outfits and creations – in a phenomenon called “masking” – but with the widespread emergence of the COVID-19 pandemic, conventions were put on hold for over a year. This paper questions how convention culture has changed in a world where cosplay can no longer rely on it due to the COVID-19 pandemic. Through analysis, personal narrative, and a critical reflection, the authors compare Saboten Con 2019 and 2021 to discuss that despite the numerous changes to the physical culture of conventions, the social essence of conventions has remained the same.
Cosplay, or the act of dressing up as a character, is a hobby that has become increasingly popular over the last several decades. Since its conception in 1939, the practice of cosplaying has always been heavily tied to that of conventions. Until 2019 these conventions were utilized by cosplayers to showcase their outfits and creations – in a phenomenon called “masking” – but with the widespread emergence of the COVID-19 pandemic, conventions were put on hold for over a year. This paper questions how convention culture has changed in a world where cosplay can no longer rely on it due to the COVID-19 pandemic. Through analysis, personal narrative, and a critical reflection, the authors compare Saboten Con 2019 and 2021 to discuss that despite the numerous changes to the physical culture of conventions, the social essence of conventions has remained the same.