National Repository of Grey Literature 7 records found  Search took 0.00 seconds. 
Analýza procesů elektromagnetické emise v živých buňkách pomocí grafů signálových toků
Šrobár, Fedor
Living cells contain polar macromolecules and higher aggregates such as microtubules. These perform mechanic vibrations and emit electromagnetic radiation. Fröhlich proposed kinetic equations for occupancy numbers of vibration modes. Signal flow graphs are employed to represent causal relationships in the model. Analytical apparatus associated with the diagrams affords quantitative characterization of the system’s behaviour. Results of numerical simulations are interpreted with regard to cell physiology.
Dispersive optical bistability in unidirectional ring cavity
Šrobár, Fedor
The models of dispersive optical bistability in unidirectional ring cavity yield transmitted intensity as a function of input intensity with additional parameters /mirror reflectivity and phase shift/. There is a feedback element in the description: the dependence of the phase shift on the transmitted power. The region of physically unstable states is marked by the condition specifying that the transmission function of the feedback loop present in the representative causal diagram is greater than 1.
Fröhlichův systém s modulovaným přístupem ke zdroji energie
Šrobár, Fedor
Fröhlich model describes coherent vibration modes of polar intracellular entities (e.g. protein molecules or microtubules) that are pumped by ATP hydrolysis and exchange energy with the surroundings. Kinetic equations expressing time change of the quantum oscillator occupancy contain the pumping rate, and the rates of change due to linear and nonlinear interactions with the phonons of the reservoir. These are analyzed supposing that the modal pumping rate is a decreasing function of the mode occupancy.

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