Search for dissertations about: "Hybrid Device"
Showing result 1 - 5 of 104 swedish dissertations containing the words Hybrid Device.
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1. Hybrid energy storage systems : Capacity optimization and environmental implication of hybrid energy storage systems in renewable power systems
Abstract : Electricity production contributes a large share of greenhouse gas emissions that lead to climate change. At present, power generation in many parts of the world still heavily depends on fossil fuels. To prevent global warming, the electricity sector is supposed to transition from the current fuel mix to renewable energy sources. READ MORE
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2. Device-to-Device Communications for Future Cellular Networks : Challenges, Trade-Offs, and Coexistence
Abstract : The steep growth in mobile data traffic has gained a lot of attention in recent years. With current infrastructure deployments and radio resources, operators will not be able to cope with the upcoming demands. READ MORE
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3. Microwave power device characterization
Abstract : The first part of the thesis covers work done on device characterizationmethods. A statistical method for estimating small-signal model parametersin FET-models was proposed. A maximum likelihood estimator wasderived and the new method was compared to a standard direct extractiontechnique. READ MORE
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4. Long-Wavelength Vertical-Cavity Lasers : Materials and Device Analysis
Abstract : Vertical-cavity lasers (VCLs) are of great interest as lightsources for fiber-optic communication systems. Such deviceshave a number of advantages over traditional in-plane laserdiodes, including low power consumption, efficient fibercoupling, on-chip testability, as well as potential low-costfabrication and packaging. READ MORE
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5. Study of GaN Based Nanostructures and Hybrids
Abstract : GaN and its alloys with Al and In belong to the group III nitride semiconductors and are today the materials of choice for efficient white light emitting diodes (LEDs) enabling energy saving solid state lighting. Currently, there is a great interest in the development of novel inexpensive techniques to fabricate hybrid LEDs combining high quality III-N quantum well (QW) structures with inexpensive colloidal nanoparticles or conjugated polymers. READ MORE