Avancerad sökning

Hittade 2 uppsatser som matchar ovanstående sökkriterier.

1. 1. Groundwater occurrence and quality in Bulawayo province, Zimbabwe

   L3-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Anton Nygren; Edvard Nordenskjöld; Erik Östblom; [2016]
   Nyckelord :total dissolved solids; salinity; electrical conductivity; electrical resistivity tomography; vertical electrical sounding; magnetic field; auger holes; saturated hydraulic conductivity;

   Sammanfattning : This study focused on determining the groundwater flow paths in the crystalline subsurface rocks of the Bulawayo metropolitan, Zimbabwe, through analysing the discontinuities of the electrical properties of the ground, as well as in the magnetic field of the underlying rocks. Further, borehole water quality was analysed by measuring and mapping several chemical parameters, specifically TDS, salinity and the electrical conductivity. LÄS MER

3. 2. Improving green LEDs: A meta study into the causes and remedies of the green gap

   Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

   Författare :Andreas Malmgren; [2015]
   Nyckelord :Light emitting diodes; quantum wells; recombination rate; Technology and Engineering; Physics and Astronomy;

   Sammanfattning : This literature review investigates and evaluates different strategies to improve InGaN-based light emitting diodes (LED) by analyzing published theoretical and experimental studies. The issues of non-uniform carrier distribution, piezoelectric polarization fields and poor wave function overlap can be mitigated by the use of InGaN barriers and substrates as well as staircase designs for quantum wells (QW). LÄS MER