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Showing result 1 - 5 of 11 essays matching the above criteria.

  1. 1. Time-resolved x-ray diffraction study of longitudinal optical phonons in zincblende semiconductors

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Lassi Linnala; [2022]
    Keywords : femtosecond THz radiation; ultrafast x-ray diffraction; pump-probe; longitudinal optical phonons; zincblende semiconductors; anharmonic decay; density functional perturbation theory; Physics and Astronomy;

    Abstract : Anharmonic decay of longitudinal optical (LO) phonons in zincblende semiconductors is not at present well characterized due to the polar and many-body nature of the problem. Femtosecond THz radiation offers a novel route to this study, as the interaction of this radiation is directly with the phonon lattice and these THz excited phonons do not have enough energy to excite electrons over the band gap. READ MORE

  3. 2. Glued connection for TCC slabs : Experimental and Numerical investigation

    University essay from Linnéuniversitetet/Institutionen för byggteknik (BY)

    Author : Ervin Halilovic; Seid Lotinac; [2022]
    Keywords : TCC connection; Composite element; Adhesive connection; Silicone Adhesive; Polyurethane Adhesive; Slip modulus; Shear stress; Cohesive elements; Traction seperation law; Mullins effect; Hysteresis;

    Abstract : Timber-concrete composite (TCC) structures are becoming more popular in several industrial applications as an efficient method for optimizing the structural performance and the cost of construction as well as lowering the emissions of carbon dioxide. TCC floors are more sustainable than pure concrete floors and more resistant to vibrations and excessive deflections than pure wooden floors. READ MORE

  4. 3. Modelling Magnetism of hcp Iron under Earth’s Inner Core Conditions : Based on first-principle DFT calculations and Machine Learning

    University essay from Linköpings universitet/Teoretisk Fysik

    Author : Linda Le; [2022]
    Keywords : Machine learning; Earth’s Inner Core; hcp Iron; Electronic structure magnetism; Density functional Theory; Local magnetic moments; Ab initio molecular dynamics; ASD-AIMD-MLLSF simulation;

    Abstract : The structure of Earth’s core remains largely a mystery. The solid inner core is believed to exist in extreme pressure and temperature conditions comparable to 300 GPa and 6000 K and consists mainly of iron, Fe. READ MORE

  5. 4. Predicting comfort in autonomous driving from vibration measurements using machine learning models

    University essay from KTH/Fordonsdynamik

    Author : Kate Asarar; [2021]
    Keywords : Passenger comfort; Machine learning; Autonomous driving; Vibrationer; Passagerarkomfort; Maskininlärning; Vibrationer; Självkörande bilar;

    Abstract : Highly automated driving is approaching reality at a high speed. BMW is planningto put its first autonomous driving vehicle on the road already by 2021. The path torealising this new technology is however, full of challenges. READ MORE

  6. 5. Accelerating longitudinal spinfluctuation theory for iron at high temperature using a machine learning method

    University essay from Linköpings universitet/Teoretisk Fysik

    Author : Marian Arale Brännvall; [2020]
    Keywords : Machine learning; longitudinal spin fluctuations; kernel ridge regression;

    Abstract : In the development of materials, the understanding of their properties is crucial. For magnetic materials, magnetism is an apparent property that needs to be accounted for. There are multiple factors explaining the phenomenon of magnetism, one being the effect of vibrations of the atoms on longitudinal spin fluctuations. READ MORE