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Hard X-rays are generated by focusing 110 fs laser pulses onto solid metal targets, with intensities of about 1017 W·cm-2• Characteristic properties of this X-ray source are the small source size, the short pulse duration, the high brightness and a possibly interesting spectral composition. Several characterizing measurements were performed, including source size, spectrum and temporal behavior. T
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This thesis describes the development of new laser-based techniques for nanometre lithography and microscopy. The potential of a non-intrusive scanned near-field optical microscope (SNOM) has been investigated. The probe consists of an optically trapped microscopic particle which is scanned in proximity to the object to be studied. Compared with conventional SNOM's, this probe would allow high-res
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Isabel Dick’s historical romance novel Wild Orchard was published in 1946. There are very scarce references to Dick in the history of Tasmanian and Australian fiction and even less critical engagement with her work. Set almost two decades after the events of the 1820s, the atrocities of Van Diemen’s Land’s macabre past appear within the novel as echoes; the pages are haunted by the island’s histor
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A custom DSP chip for mobile radio systems like the American IS-54 system is presented. The application is a digital intermediate frequency filter which is intended to replace expensive analog filters. It is a lattice wave digital filter with fixed coefficient bit-serial arithmetic. A technique which is useful for area efficient layouts in high throughput real time signal processing is discussed
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The Swedish word att /at/ is associated with two grammatical functions: a) (part of) a subordinate conjunction and b) an infinitive marker. This pilot study, with 5 short spontaneous discourses from 3 male speakers shows a correlation between pauses after att, and aspiration of /t/ in att, where aspiration can be interpreted as a kind of final lengthening involving the release phase of the stop co
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Today it is feasible for utilities to control selected customer loads in a nondisturbing fashion. This is comparable to load shedding, but has a wider area of application. This paper focuses on direct load control or modulation for power system damping and is based on a field test of on-off control and modal analysis of differential-algebraic equation models of three test systems. Real power load