Sökning: "Channels"
Visar resultat 1 - 5 av 1357 avhandlingar innehållade ordet Channels.
1. The interplay of ions in the stimulation of the pancreatic -cell
Sammanfattning : Glucose stimulation of insulin release is mediated by depolarisation of the pancreatic β-cells with accompanying entry of Ca2+ through voltage-dependent channels. An important feature of the glucose-induced depolarisation is its rhythmicity causing oscillations of the cytoplasmic Ca2+ concentration ([Ca2+]i), which trigger pulsatile release of insulin. LÄS MER
2. Detection principles for fast Rayleigh fading channels using an antenna array
Sammanfattning : .... LÄS MER
3. The Role of Suppliers and Resellers : Cases of Timber Product Distribution Channels
Sammanfattning : This dissertation aims to explain the impacts of distribution channel developments on the roles of timber product distribution channel actors. The role of channel actors in this dissertation is defined as the structured behaviour pattern that combines activities and resources in distribution channels. LÄS MER
4. Quantized Feedback for Slow Fading Channels
Sammanfattning : Two topics in fading channels with a strict delay constraint and a resolution-constrained feedback link are treated in this thesis. First, a multi-layer variable-rate single-antenna communication system with quantized feedback, where the expected rate is chosen as the performance measure, is studied under both short-term and long-term power constraints. LÄS MER
5. Modeling of voltage-gated ion channels
Sammanfattning : The recent determination of several crystal structures of voltage-gated ion channels has catalyzed computational efforts of studying these remarkable molecular machines that are able to conduct ions across biological membranes at extremely high rates without compromising the ion selectivity. Starting from the open crystal structures, we have studied the gating mechanism of these channels by molecular modeling techniques. LÄS MER