Essays about: "Frihetsgrader"

Showing result 1 - 5 of 70 essays containing the word Frihetsgrader.

  1. 1. Gravitational Collapse of a Massless Scalar Field in a Theory of Minimally Modified Gravity

    University essay from KTH/Fysik

    Author : Atabak Fathe Jalali; [2024]
    Keywords : Theoretical physics; astrophysics; modified gravity; minimally modified gravity; gravitational collapse; VCDM; scalar collapse; apparent horizon; numerical relativity; Teoretisk fysik; astrofysik; modifierad gravitation; minimalt modifierad gravitation; gravitationskollaps; VCDM; skalär kollaps; uppenbar horisont; numerisk relativitet;

    Abstract : This thesis explores the spherically symmetric gravitational collapse of a massless scalar field in a minimally modified gravity theory denoted VCDM (V replaces $\Lambda$ in the $\Lambda$CDM abbreviation), a class of theories propagating the same degrees of freedom as general relativity at the expense of broken 4D diffeomorphism invariance. Numerical evolution of the equations of motion reveals that for small initial scalar profile amplitudes, no black hole forms from the collapse. READ MORE

  3. 2. A Statistical Approach to Understand the Evolution of Exotic Butterfly Species

    University essay from KTH/Matematisk statistik

    Author : Elin Eliasson; Rebecka Haraldsson; [2023]
    Keywords : Phylogenetics; Tree reconstruction; COI barcoding; General Time Reversible Model; K80 Model; Evolution; Butterflies; Fylogenetik; Rekonstruktion av träd; COI barcoding; General Time Reversible modell; K80 modell; Evolution; Fjärilar;

    Abstract : The alarming rate at which we see the decline in biodiversity due to human activity has raised concerns about the well-being of our planet. Butterflies which serve as pollinators are an essential part of many ecosystems and sensitive indicators of environmental changes and can provide valuable insight into how ecosystems function and evolve. READ MORE

  4. 3. Tools and Challenges in Evaluating Control Surface Airworthiness for a Blended-Wing-Body UAV

    University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Author : Anton Åkesson; [2023]
    Keywords : ;

    Abstract : For transport aeroplanes the Blended-Wing-Body (BWB) configuration shows promise in improving aerodynamic efficiency. The Green Raven project strives to demonstrate hydrogen fuel-cell-electric propulsion on a 4 m wingspan BWB. READ MORE

  5. 4. Linear Position Tracking for Controlling a Robotic Arm Using Inertial Sensors : Development of a Robotic Arm and an Inertial Sensor-Based Tracking System

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Jesper Knobe; Tobias Pekola; [2023]
    Keywords : Mechatronics; Robotic Arm; Inertial Measurement Unit; Inverse Kinematics; Microcontroller; Mekatronik; Robot Arm; Tröghetsmätare; Inverterad Kinematik; Mikrokontroller;

    Abstract : In the field of mechatronics, different types of robotic arms are used for various applications. Control of robotic arms from a distance is required in certain situations, such as hazardous environments. READ MORE

  6. 5. Quadcopter Control System Design and Implementation with LQR assisted by Kalman Filter: An Experimental Study

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Ludwig Horvath; Martin Petré; [2023]
    Keywords : ;

    Abstract : This study stems from the audacious assumption that two bachelor students could successfully construct a functional quadcopter from scratch, covering both software and hardware aspects. The project begins by establishing a foundation for modeling the quadcopter dynamics, including derivation and linearization techniques for implementing a linear quadratic regulator (LQR). READ MORE