Kati Virtanen

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Metallic dental restorations and prosthetic constructions are susceptible to corrosion in oral environment, resulting in the release of various heavy metal ions. Chloride salts of zinc, copper, nickel, chromium, iron and gold were tested for their ability to promote the migration of polymorphonuclear leukocytes (PMNs). Using a modified Boyden chamber assay(More)
A combination selection based device mismatch calibration for mixed-mode array processors is discussed. Clear benefits in implementation area and accuracy, compared to large transistors can be reached by using mismatch calibration which is based on the combination selection of minimum-sized transistors. By utilizing the in-cell memory elements present in a(More)
In this paper we propose a self-adapting image sensing scheme that compresses a wide dynamic range scene so that important visual characteristics are preserved throughout the perceived dynamic range. The exposure times of sensors are made adaptive to local illumination conditions while signal is being integrated. Resistive filtering with locally adaptive(More)
Analog Viterbi Decoder (AVD) is used for decoding of message from the received signal. Very recently mixed signal architecture for OFDM was proposed, that uses FFT processing in the analog domain. In this work, we propose a modified analog Viterbi decoder that performs decoding in analog domain. The proposed analog Viterbi decoder can be used in the mixed(More)