Essays about: "Unknown unknowns"

Showing result 1 - 5 of 6 essays containing the words Unknown unknowns.

  1. 1. Inverse Atmospheric Dispersion Modeling in Complex Geometries

    University essay from Umeå universitet/Institutionen för fysik

    Author : Charlie Pelland; [2022]
    Keywords : atmospheric dispersion modeling; dispersion modeling; invers dispersion modeling; atmospheric dispersion; invers atmospheric dispersion; CFD; computational fluid dynamics; radioactive release; openfoam; CRBN; dry deposition; dry deposition velocity; scavenging effect; wet deposition; optimization model; Reynolds Averaged Navier-Stokes; adjoint mode; time-dependent rain simulation; time-dependent rain; time dependent rain simulation; time dependent rain;

    Abstract : In the event of a radioactive release in an urban environment the consequent response mustbe swift and precise. As soon as first responders have correct information, they can make anaccurate risk assessment. However, if the position, release rate and time of the radioactiverelease is unknown it is hard to know how the pollutant will spread. READ MORE

  3. 2. Primordial Gravitational Waves and ultra-light Dark Matter in a complex singlet extended Standard Model

    University essay from Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Author : Sara Wildenor; [2021]
    Keywords : theoretical physics; gravitational waves; dark matter; complex singlet extended standard model; LISA; BBO; DECIGO; Physics and Astronomy;

    Abstract : In this thesis, the consequences of extending the internal symmetries of the standard model with a complex singlet scalar field, are investigated in terms of dark matter phenomenology and the possibility of primordial gravitational wave detection utilizing space based laser interferometry. The scalar potential of the model is constructed with a Z2 symmetry, which allows for the retainment of a linear and a quadratic coupling parameter, as well as a stable dark matter candidate, and an additional non-zero vacuum expectation value for the real component of the scalar field. READ MORE

  4. 3. Benchmarking a Cryogenic Code for the FREIA Helium Liquefier

    University essay from Uppsala universitet/FREIA

    Author : Elias Waagaard; [2020]
    Keywords : Cryogenics; Liquefaction; Helium;

    Abstract : The thermodynamics inside the helium liquefier in the FREIA laboratory still contains many unknowns. The purpose of this project is to develop a theoretical model and implement it in MATLAB, with the help of the CoolProp library. READ MORE

  5. 4. Black Swan Investing: An empirical study in context of efficient markets

    University essay from Lunds universitet/Företagsekonomiska institutionen

    Author : Aleksis Tastsidis Olsson; Pontus Löfberg; [2014]
    Keywords : Black Swans; Efficient market hypothesis; Fat-tails; Kelly criterion; Outliers; Trading strategy; Unknown unknowns; Business and Economics;

    Abstract : Purpose: The purpose of this paper is to assess the sustainability of the efficient market theorem when accounting for extreme events, which are of the essence in a Black Swan investment philosophy. Methodology: Quantitative approach. READ MORE

  6. 5. Exploring the ‘Unknown Unknowns’ of Urban Farming : An ethnographic case study, in narrative form, on the last urban farm in Stockholm, Sweden

    University essay from Stockholm Resilience Centre

    Author : Christopher Hill; [2011]
    Keywords : ;

    Abstract : Abstract. The prediction of growing global populations flocking to cities, increasingdemands for more food production, the call to maintain biodiversity and the interactionsof many different stakeholders elicits quite a mind-boggling medley of complexity. READ MORE