Essays about: "resistivity"

Showing result 1 - 5 of 86 essays containing the word resistivity.

  1. 1. The Quantum Hall Effect

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Conrad Grälls; [2020]
    Keywords : quantum hall effect; QHE; fractional quantum hall effect; FQHE; hall effect;

    Abstract : The quantum Hall effect occurs when a conductor carrying a current is placed in a perpendicular magnetic field. If certain conditions are met, such as strong magnetic field and low temperature, the resistivity becomes quantised, taking values of integer or fractional multiples of h/e2. READ MORE

  2. 2. Rainwater Infiltration Model of the Chocaya Basin using Hydrus-1D

    University essay from Lunds universitet/Teknisk geologi; Lunds universitet/Väg- och vattenbyggnad (CI)

    Author : Alexander Bergman; Mire Persmark; [2020]
    Keywords : Rainwater Infiltration; Alluvial Plain; Chocaya Basin; Hydraulic Conductivity; Double Ring Infiltrometer DRI ; Hydrus-1D; Electrical Resistivity Tomography ERT ; Earth and Environmental Sciences;

    Abstract : The objective of this study was to assess the rainwater infiltration process in the unsaturated zone in an alluvial plain. Particularly, this study is focused on the Chocaya basin in central Bolivia. READ MORE

  3. 3. Evaluating locations for subsurface dams : Case study on Storsudret, Gotland

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik; KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Karl Engström; Maximilian Skoglund Lartell; [2020]
    Keywords : Subsurface dams; MIKE SHE; groundwater; groundwater modelling; water resource management; resistivity measurements; hydrogeology; Grundvattendammar; MIKE SHE; grundvatten; hydrogeologi; grundvattenmodellering; vattenresurshantering; resistivitetsmätningar; hydrogeologi;

    Abstract : Due to precipitation poor winters and springs and over-exploitation of groundwater reserves during the summer months as a consequence of tourism, the island of Gotland has experienced fresh water shortages during recent years which has led to harsh restrictions in the use of municipal water. In order to find a solution to the islands fresh water problems, the region of Gotland and the Swedish Environmental Institute (IVL) have initiated a project in which the southernmost part of Gotland, Storsudret, will be used as a test site for new methods of sustainable freshwater storage and extraction methods. READ MORE

  4. 4. Measurements of resistivity in transformer insulation liquids

    University essay from Uppsala universitet/Institutionen för elektroteknik

    Author : Jonathan Hägerbrand; [2020]
    Keywords : transformer oil; resistivity; ions; ion drift model; HVDC; contact resistance;

    Abstract : This thesis focuses on measuring techniques and results of resistivity in four commercially available insulating transformer oils: mineral oil, ester oil and two isoparaffin oils. Two measuring techniques, the industrially used diagnostic system for electrical insulation IDA and the Labview implemented Triangular Method, are used for resistivity measurements and the techniques are compared, a correction algorithm to the triangular method is suggested. READ MORE

  5. 5. Photoconductivity in rare earth metal-oxy-hydrides

    University essay from Uppsala universitet/Materialteori

    Author : Félix Treuil-Dussouet; [2020]
    Keywords : Photoconductivity;

    Abstract : In this project the evolution of resistivity under light exposition in materials like rare earth metal-oxy-hydrides is studied. These materials observe a decrease of the resistance when exposed under the light of a 19,5 W power lamp, and slowly tend to return to their initial resistance. READ MORE