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Luminescence study of self-trapped holes in pure and Fe- or Mo-doped ZnWO4 crystals

Thermostimulated and photostimulated luminescence of ZnWO4, ZnWO4:Fe and ZnWO4:MO Crystals irradiated at low temperatures by X-rays or UV photons was studied in the temperature range 4.2-300 K in order to clarify the creation and recombination processes of the elementary colour centres. The connection of the luminescence phenomena with the self-trapped holes has been revealed. (C) 2003 Published b

Effects of Proprioceptive Vibratory Stimulation on Body Movement at 24 and 36 h of Sleep Deprivation

Objectives: To investigate whether postural stability and adaptation differed after a normal night of sleep, after 24 h (24 SDep) and 36 h (36 SDep) of sleep deprivation while subjected to repeated balance perturbations. Also, to determine whether there was any correlation between subjective alertness scores and objective posturographic measurements. Lastly, to investigate the effects of vision on

Distributed averaging on digital noisy networks

We consider a class of distributed algorithms for computing arithmetic averages (average consensus) over net- works of agents connected through digital noisy broadcast channels. Our algorithms combine error-correcting codes with the classical linear consensus iterative algorithm, and do not require the agents to have knowledge of the global network structure. We improve the performance by introduc

Sverige – EEG och konkurrensen

Detta är HHLs första publicerade alster, som siktar till en utvecklad diskussion om hur det svenska frihandelsavtalet med EEC kan tänkas komma att fungera i praktiken. I första hand är det frihandelsavtalets artikel 23 med konkurrensbegränsningsregler som lyfts fram. Bestämmelsen saknar direkt effekt, men vad innebär det att gemenskapen gjort en tolkningsförklaring om att bestämmelsen ska tolkas e

Assessment of different paper drying processes to reduce the total energy costs from a mill perspective

Since the energy required in the paper drying process gives rise to substantial costs for the paper producing companies, it is of great interest to reduce the input of primary energy resources to the dryer. Either process changes or further heat recovery can be employed. A simulation tool was developed, using the programming tool Extend, with the aim to accurately describe the energy use and costs