Essays about: "adiabatic"

Showing result 11 - 15 of 58 essays containing the word adiabatic.

  1. 11. Measuring T1 using MP2RAGE in Human Brain at 7T – Effect of B1+ and Inversion Pulse Efficiency

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Mustafa Kadhim; [2021]
    Keywords : Medicine and Health Sciences;

    Abstract : Introduction: The MP2RAGE technique has become popular for structural MRI at ultra-high fields. The core idea behind MP2RAGE is to reduce the influence of flip angle inhomogeneity (B +), proton density and T2* by calculating the regularized signed ratio of two complex MP-RAGE images acquired at different inversion times (TI) within the cycle. READ MORE

  3. 12. A Numerical Study of Melt Pool Heat Transfer in the IVR of a PWR

    University essay from KTH/Fysik

    Author : Yuer Zhao; [2021]
    Keywords : In-vessel melt retention; corium pool; Zr oxidation ratio; melt pool convection; CFD; SST k-ω turbulence model; Smältretention i kärlet; koriumpöl; Zr-oxidationsförhållande; konvektion i en smältpöl; CFD; SST k-ω turbulensmodell;

    Abstract : This thesis aims to provide the thermal condition of melt pool convection by CFD simulation, which is important to the assessment of the invessel melt retention (IVR) strategy widely adopted in Generation III pressurized water reactors (PWRs). As a severe accident mitigation measure, the IVR strategy is realized through external cooling of the lower head of a reactor pressure vessel (RPV). READ MORE

  4. 13. Machine-Learning for Lattice Models in and out of Equilibrium

    University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Author : Johannes Sandberg; [2021]
    Keywords : Physics and Astronomy;

    Abstract : Machine-learning methods have in recent years seen a great deal of use in condensed matter physics. In this thesis we apply such methods, specifically machine-learning with artificial neural networks, to the equilibrium and non-equilibrium description of the Hubbard and Hubbard-Holstein models. READ MORE

  5. 14. The carbon footprint caused by the oversizing of building service systems : A case study of an NHS Hospital

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Maria Hein; [2020]
    Keywords : Design; dimensioning; heating; cooling; boiler; chiller; pump; energy performance; environmental impact; mitigation strategy;

    Abstract : Energy usage in buildings is a main contributor to CO2 emissions and in order for the EU to reach the 2050 goal of carbon-neutrality, there is a great need to improve the energy efficiency in buildings, particularly commercial buildings that often are substantially overdesigned. Excess margins in the design process of building services result in an oversizing of these systems which has great environmental impacts, divided up as the operational and embodied carbon footprints. READ MORE

  6. 15. An armored truck cab design : Case study: investigation of selected steel grades

    University essay from KTH/Materialvetenskap

    Author : Filippo Pellegrini; [2020]
    Keywords : Ballistic steel; single and double layer protection; truck cab; dynamic softening; Ballistiskt stål; enkel- och dubbelskiktsskydd; konstruktion av lastbilshytt; dynamisk mjukning;

    Abstract : This study aimed at defining useful guidelines for the design of an armored truck cab. Particularly, the quality and performance of ballistic steel were defined, considering not too high demanding requirements. Two steel grades, corresponding to hardness of 500 HB and 600 HB, and three different suppliers were selected. READ MORE