Sökning: "ring current"
Visar resultat 1 - 5 av 64 avhandlingar innehållade orden ring current.
1. Pharmacy Internship : Students’ Learning in a Professional Practice Setting
Sammanfattning : The aim of this thesis was to explore Swedish pharmacist students’ learning during pharmacy internship. Internships are meant to introduce students to professional practice. LÄS MER
2. Instrumentation for energetic Neutral atom measurements at Mars, Venus and The Earth
Sammanfattning : This thesis deals with the development and calibrations of sensors to measure energetic neutral atoms (ENAs) at Mars, Venus, and the Earth. ENAs are formed in charge exchange processes between energetic, singly--charged ions and a cold neutral gas. LÄS MER
3. Solar Wind and Geomagnetic Activity - Predictions Using Neural Networks
Sammanfattning : This thesis shows how artificial neural networks (ANNs) can be applied to predict geomagnetic activity from solar-wind data. It introduces and summarizes five papers where development of ANN models are reported, and where predictions of geomagnetic activity are discussed. LÄS MER
4. Aspects on Wind Turbine Protections and Induction Machine Fault Current Prediction
Sammanfattning : This thesis presents detailed modelling of the induction machine with the main objective being accurate fault current prediction. The thesis focus mainly on mains connected induction machines and the response due to severe disturbances in the supply voltage, such as three-phase short-circuit faults. LÄS MER
5. Trees and the environment : Possibilities and challenges in tree-ring research across spatial and temporal scales based on case studies in Sweden
Sammanfattning : The need to understand and quantify the magnitude and frequency of past and current environmental changes increased the demand for high-resolution proxy data across spatial and temporal scales. Due to their long lifespan and global distribution, trees provide a unique and continuous record of environmental variability. LÄS MER