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Technical advances in digital communications facilitate new applications, which are required also by global changes and are based on an intensive use of knowledge. This paper presents such an application and refers to the improving knowledge-based services of German economic agencies that use intensively the Internet and the Web. The presented work is carried out within a German project supported by the Federal Ministry of Economy and Technology BMWT. A key role within the project is a digital experiment involving the development of required economic, social and technical competences for the agencies' staff by using web-based qualification processes and virtual learning communities. 相似文献
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The initial interpretations of motion phenomena are often in terms of eye movements. It reflects a desire to link an objective expression of motion (of the eyes) with a subjective experience of motion. This approach is examined historically with respect to induced motion, motion aftereffects, visual vertigo, autokinetic effects and stroboscopic motion. All but one of these phenomena were initially observed in the natural environment and they have subsequently been studied under laboratory conditions. Eye movements are not correlated with induced motion, the motion aftereffect, or stroboscopic motion, but they do correspond to the direction and extent of visual vertigo. The extent of apparent visual motion in the autokinetic effect far exceeds that of involuntary eye movements but there might be a weak relation between them. If eye movements are to provide a reasonable account of motion illusions then they should apply to all the contours that are visible. This does apply to visual vertigo, but not to induced motion, the motion aftereffect and stroboscopic motion, all of which involve relative motion in a visible display. The autokinetic phenomenon involves the perception of isolated stimuli, and so interpretations in terms of some internal eye movement signals remain sustainable. 相似文献
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Much of the empirical research on urban sprawl has been carried out in North America and most theoretical studies on this problem have been concerned with expanding urban areas. This study differs, firstly in that it is concerned with sprawl in two European cities, Liverpool in England and Leipzig in Germany, and secondly because both these cities are in decline. This presents an opportunity to explore whether the process of urban sprawl is somehow specific in a situation of urban decline and what its outcomes might be for both urban form and urban policy. 相似文献
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After both the First and Second World Wars, the Polish state used nationality law as a tool for ethnic de-integration and dispossession, albeit in varying measure and with differing impact. After 1918, legislation and implementation focused less on economic interests than on those of the nation-state. Through the liquidation of private property against compensation, the German population, especially in Western Prussia, Poznań and Pomerelia, were to be persuaded to leave Poland voluntarily. These measures were within the legal framework set by the Versailles Treaties and the national tradition of civil law. 相似文献
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