Nikolaos Papandreou

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Recommended by Kostas Berberidis Multicarrier modulation is a powerful transmission technique that provides improved performance in various communication fields. A fundamental topic of multicarrier communication systems is the bit and power loading, which is addressed in this article as a constrained multivariable nonlinear optimization problem. In(More)
— Phase-change memory (PCM) has emerged as one among the most promising technologies for next-generation non-volatile solid-state memory. Multilevel storage, namely storage of non-binary information in a memory cell, is a key factor for reducing the total cost-per-bit and thus increasing the competitiveness of PCM technology in the nonvolatile memory(More)
—Power-line communications (PLC) is recognized as an alternative technology for delivering broadband services in home and small-office environments. Multicarrier modulation is one of the most effective solutions for combating the imperfections of the power-line channel. One of the technical challenges in increasing the potentiality of PLC technology is the(More)
NAND Flash memory is not only the ubiquitous storage medium in consumer applications, but has also started to appear in enterprise storage systems as well. MLC and TLC Flash technology made it possible to store multiple bits in the same silicon area as SLC, thus reducing the cost per amount of data stored. However, at current sub-20nm technology nodes, MLC(More)
— This paper addresses the problem of efficient resource allocation for multiuser orthogonal frequency division multiplexing over frequency selective channels. For wideband applications, such as power line communications and wireless networks, the development of low-complexity and fast execution time algorithms is important due to the time-varying behavior(More)
G-protein coupled receptors (GPCRs) are a major family of membrane receptors in eukaryotic cells. They play a crucial role in the communication of a cell with the environment. Ligands bind to GPCRs on the outside of the cell, activating them by causing a conformational change, and allowing them to bind to G-proteins. Through their interaction with(More)