Dr. Peter Driessen’s research group at University of Victoria is working on building a system using microphone arrays of arbitrary geometry to zoom in on desired audio in a noisy environment. Ultimately a listener will be able to simply look at the location from where s/he wants to hear the audio, controlling the audio zoom via head and eye gestures.
Cognitive radio networks are fundamentally different from traditional cellular networks because multiple competing service providers simultaneously co‐exist in the same wireless spectrum. Service providers can significantly increase the network capacity by deploying dynamic resource allocation algorithms that are robust to time‐varying and uncertain environments as well as the actions of other, possibly selfish entities.
Solar energy has long been recognized as one of the most abundant forms of clean energy. Countless research efforts around the globe are contributing to the steady decline in the cost of photovoltaic power, with the promise of reaching grid parity in the near future. This is a complex target, as the price of conventional energy sources is constantly in flux and heavily dependent on government subsidies. The penetration level of solar power is rapidly increasing in most developed countries due to government incentives and multi-disciplinary technological advances.
The key challenge of condition monitoring is to predict, based on non-destructive inspection and operating data, whether or not a piece of equipment needs replacing or not. In this case the piece of equipment is an overhead power conductor – a critical element in electrical power supply. Measuring the voltage level of an overhead conductor presents a challenging engineering problem.
Recent studies have shown that many licensed spectrum bands are under-utilized, which form spectrum holes . The concept of cognitive radio was introduced in order to increase the usage of the spectrum . In cognitive radio systems , unlicensed users (which are also called secondary users) can perform sensing over a wide range of spectrum bands. The secondary users can opportunistically access the unused licensed bands from the legacy spectrum holders (which are also called primary users). In order words, the secondary users
In photosynthesis a protein complex absorbs photons and converts them to charge. This process is achieved with extremely high quantum efficiency. We are investigating several means of incorporating these protein reaction centres into photovoltaic devices. The key is to efficiently extract charge from the reaction centres. We are doing this using direct tunneling to electrodes or by passing charge to a mediator molecule that carries it to a selective electrode. Ultimately we hope to demonstrate a very low cost method for converting solar to electrical energy.