Sharif Digital Repository

Grid simulator is a system that, as a voltage source, can produce various current waveforms in power grid at its output, and also as a load, can draw different currents of different loads from the power grid. Grid simulators may be used for testing power grid connected systems, such as chargers, power supplies, etc. In this thesis the system is consisted of programmable AC current source, dual active bridge converter and back-to-back grid-tied inverter. Dual active bridge can normally operate while the current source is in different modes of function, such as constant current, constant power and constant impedance. Depending on the mode of function, the current at the DC link can behave... 

Diabetes has become the most prevalent disease all among the world. One of the complications of this disease is diabetic nephropathy. Diabetic nephropathy occurs when the kidney cells encounter high glucose concentration for long periods. Kidney cells use glucose as their energy supply. However, the excess glucose in the diabetics triggers specific gene pathways, gradually leading to diabetic nephropathy. As a result, proteins’ levels and the activity of transcription factors change during the disease progression. Diabetic nephropathy is characterized by excessive deposition of the proteins comprising the extracellular matrix in the mesangium, basement membrane of the glomerulus, and in the...