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Showing result 1 - 5 of 9 essays matching the above criteria.

  1. 1. Starbursts at Cosmic Dawn : Formation of Globular Clusters, Ultra-Faint Dwarfs, and Population III star clusters at z > 6

    University essay from Stockholms universitet/Institutionen för astronomi

    Author : Olof Nebrin; [2022]
    Keywords : Cosmology; Galaxy Formation; Globular Clusters; First Stars; Dark Matter; Cosmic Dawn; Reionization; Ultra-Faint Dwarfs;

    Abstract : In the standard model of cosmology (ΛCDM) the first stars, star clusters, and galaxies are expected to have formed in short bursts of star formation in low-mass dark matter halos at high redshifts (). Up to this point, attempts to predict the properties and abundances of these luminous objects have made use of numerically expensive cosmological simulations. READ MORE

  3. 2. Biomechanical Analysis of Implant plates for Mandibular Condyle fractures

    University essay from

    Author : Viswambik Rohit Kumar Dhurvasula; [2019]
    Keywords : Finite Element Analysis; Hydroxyapatite; Poly-L-lactic acid; stress shielding; Maxillofacial surgery.;

    Abstract : In the field of maxillofacial surgery, the treatment for the recovery of the fracture at condyle region of the mandible has been carried out using Bio-metals such as Titanium, Cobalt, Stainless-Steel because they were considered the standard materials for Implant plate devices for fracture fixation. Using these materials have led to undesired disturbances where the patient must undergo secondary surgery after recovery leading to exposure of the fracture site to the surrounding, metal-ion release into the human system, stress-shielding and interruption during imaging i. READ MORE

  4. 3. Power cables in battery electric vehicles used in underground mining : Analysis of electromagnetic dynamics in high-power cables and development of application-specific design strategies for reduction of EMI

    University essay from Uppsala universitet/Elektricitetslära

    Author : Chisom Miriam Ekweoba; [2019]
    Keywords : ;

    Abstract : The electrification of the automotive industry is growing in popularity, considering the environmental impacts of the conventional diesel-powered automobile. However, from the electromagnetic compatibility (EMC) viewpoint, it is observed that the use of variable-frequency drives (VFD) and relatively high-power cables to propel electrical motors has led to a considerable rise in electromagnetic interference (EMI) within and outside the machine. READ MORE

  5. 4. Assessment of two optimization strategies for pediatric computed tomography examinations: Bismuth shielding & organ-based tube current modulation

    University essay from Stockholms universitet/Fysikum

    Author : Sofia Skyttner; [2017]
    Keywords : Pediatric CT Computed Tomography Bismuth TCM tube current modulation optimization organ dose eye breast;

    Abstract : Background: It is well known that pediatric patients are different from adult patients. Not only are children of a smaller physical size, but their anatomy differs as well. They are also more vulnerable to ionizing radiation than adults are, since their larger attributable life-time risk for cancer. READ MORE

  6. 5. Characterization of Stainless Steel Welding Fume Particles : Influence of Stainless Steel Grade, Welding Parameters and Particle Size

    University essay from KTH/Materialvetenskap

    Author : Nanxuan Mei; [2016]
    Keywords : welding fume; stainless steel; chromium; manganese; particles;

    Abstract : Welding is a widely used method to join two pieces of stainless steel. Since it produces a large amount of fume during the process, it can cause adverse health effects. The welding fume particles contain many elements. Among them Cr, Mn and Ni are of concern. READ MORE