We develop a unifying framework to investigate the effects of firms’ internet presence on productivity and market … structure. Using information on website adoption as an indicator of online trading, we treat the decision of entering an e … information of companies’ online status. The period analysed is associated with the early stage of internet diffusion and our …

theoretischen Grundlagen, auf die eine datenbankgestützte Website aufbaut, sowie deren Umsetzung mittels der Skriptsprache PHP 4 …The concept of a database driven website strictly separates between the design and layout of a webpage from the content … templates if a user requests the needed information.One of the most important advantages of a database driven website is the …

Low-visibility conditions at airports can lead to capacity reductions and therefore to delays or cancelations of … arriving and departing flights. Accurate visibility forecasts are required to keep the airport capacity as high as possible. We … generate probabilistic nowcasts of low-visibility procedure (lvp) states, which determine the reduction of the airport capacity …

Low visibility conditions enforce special procedures that reduce the operational flight capacity at airports. Accurate …

of installing which is up to three times higher in comparison to all PV systems. At rural locations visibility may be …

,000 potential placement cells. We calculate distance-dependent noise and visibility damages for each placement cell by using …

of visibility in social dilemmas. We compare the sorting behavior of households sharing (or not) their bin for unsorted …