V evropském výzkumném centru pro částicovou fyziku CERN je nalezen rituálně zavražděný vědec. Do Ženevy přilétá harvardský profesor symbolog Robert Langdon, aby pomohl rozluštit záhadné znamení, které kdosi umučenému vědci vypálil na hruď, a dochází k šokujícímu zjištění: cejch je dílem iluminátů, tajného bratrstva, které podle veškerých důkazů již dávno zaniklo. Nyní se však ilumináti znovu objevili na scéně s plánem pomstít se svému odvěkému nepříteli - katolické církvi. Z CERNu současně mizí čtvrt gramu antihmoty, jejíž anihilací může dojít k výbuchu o síle pěti kilotun trinitrotoluenu a zničení všeho v okruhu více než půl kilometru... and Andrea Cejnarová.
The author, a staff member of the oldest laboratory studying holography in the Czech Republic, describes the development of the laboratory from its beginnings through to the stage of holographic interferometry and onto advanced research in holographic diffraction gratings involving spectroscopic gratings, two dimensional measuring gratings, and diffractive sweepers. In addition, diffractive optics studied during the latest period is discussed., Miroslav Miler., and Obsahuje seznam literatury
Since recently, it is possible, using noninvasive cortical stimulation, such as the protocol of paired associative stimulation (PAS), to induce the plastic changes in the motor cortex, in humans that mimic Hebb's model of learning. Application of TMS conjugated with peripheral elec trical stimulation at strictly coherent temporal manner lead to convergence of inputs in the sensory-motor cortex, with the consequent synaptic potentiation or weakening, if applied repeti tively. However, when optimal interstimulus interval (ISI) for induction of LTP-like effects is applied as a single pair, Motor evoked potential (MEP) amplitude inhibition is observed, the paradigm known as short-latency afferent inhibition (SLAI). Aiming to resolve this paradox, PAS protocols were applied, with 200 re petitions of TMS pulses paired with median nerve electrical stimul ation, at ISI equa l to individual latencies of evoked response of somatosensory cortex (N20) (PASLTP), and at ISI of N20 shortened for 5 msec (PASLTD) - protocols that mimic LTP-like changes in the human motor cortex. MEP amplitudes before, during and after interventions were measured as an indicator based on output signals originating from the motor system. Post-intervention MEP amplitudes following the TMS protocols of PASLTP and PASLTD were facilitated and depressed, respectively, contrary to MEP amplitudes during intervention. During PASLTP MEP amplitudes were significantly decreased in case of PASLTP , while in the case of PASLTD an upward trend was observed. In conclusions, a possible explanation for the seemingly paradoxical effect of PAS can be found in the mechanism of homeostatic modulation of plasticity. Those findings indicate the existence of complex relationships in the development of plasticity induced by stimulation, depending on the level of the previous motor cortex excitability., N. V. Ilić., and Obsahuje bibliografii a bibliografické odkazy