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In this thesis an adaptive optics system has been developed, implemented and evaluated at the Lund High Power Laser facility, Atomic Physics Division, Lund Institute of Technology. The laser system delivers ultrashort pulses with peak powers exceeding 40 TW at a repetition rate of 10 Hz. The pulses are focused to achieve extreme irradiance exceeding 1019 W/cm2 . In order to increase the peak inten
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Control is traditionally applied using periodic sensing and actuation. In some applications, it is beneficial to use instead event based control, to communicate or make a change only when necessary. There are no known general closed form solutions to such event based control problems. We consider stationary event-based control problems with mixed continuous/discrete time dynamics and stochastic di
Abstract is not available
Convolutional codes are defined to be equivalent if their code symbols differ only in how they are ordered and two generator matrices are defined to be weakly equivalent (WE) if they encode equivalent convolutional codes. It is shown that tailbiting convolutional codes encoded by WE minimal-basic generator matrices have the same spectra. Shearer and McEliece showed that MacWilliams identity does n
The hyperfine structure for the 6, 7 and 8 2 S 1/2 states of 23 Na was measured by optical double-resonance techniques. The states were populated by step-wise excitation using two CW dye lasers. For the dipole interaction constant a, a(6 2 S 1/2 ) = 37.5(2) MHz, a(7 2 S 1/2 )=20.9(1) MHz, a(8 2 S 1/2 )=12.85(10) MHz. were obtained. Theoretical calculations of the hyperfine structure were performed
Two studies were conducted to assess the Swedish version of the Five Facets Mindfulness Questionnaire (FFMQ) originally created by Baer et al. (2006). The aim of Study 1 was to examine the psychometric properties of the FFMQ using data from 498 individuals. Quantitative and qualitative analyses resulted in a reduction of the scale by ten items. Psychometric properties, including internal consisten
Shoreline response behind a detached breakwater and at a T-head groin observed in a large-scale physical model was validated with an updated GENESIS model. A new total load longshore sediment transport rate formula, introduced in this paper, was developed and incorporated in GENESIS to address engineering predictive requirements at coastal inlets. The relationship represents the contribution from
