Viruses are ubiquitous components of the marine environment, frequently reaching concentrations of 107–108 viruses per milliliter of surface seawater. The majority of these viral particles are bacteriophages (phages). Although the oceans are probably the largest pool of bacteriophages on the planet, the evolutionary relationships of marine phages to phages from other environments are unknown. T...

STOLEN Sixteenth-century icon painted on wood: Virgin and Child. The painting is badly damaged and only part of the head of the Infant Jesus is visible. Dimensions: height (left) 24.1 cm, (right) 20.7 cm, width 23.4 cm, thickness 1.7 cm. Corrigendum We would like to apologise for the error printed in Jim Angus's article in Museum International 205. The final paragraph of his article should have...

The study of the landscape was once the main subject of study in geography. Now, it is a core topic in many disciplines, such as geography and ecology, soil science and land survey, landscape architecture and planning, psychology and philosophy, history and archaeology. This essay analyses how this evolution came about in Europe in general and focuses then upon the Belgian situation. Landscape ...

Concentric mosaic offers a quick solution for the construction and navigation of a virtual environment. However, the associated huge amount of data presents a heavy burden for its application. In this paper, we propose the rebinning of slits (ROSS) approach for the compression of concentric mosaic. The proposed scheme decorrelates the 3D concentric mosaic data set by rebinning the vertical slit...

The MPEG-2 standard is the most used codec for video compression. This paper investigates the consequence of replacing the JPEG core system of the MPEG-2 video codec by a progressive image codec, specifically JPEG 2000, so creating a video codec (VC) that can match any desired bit rate. The quality of compressed video sequences between MPEG-2 and VC is compared. Results show that our codec impr...

Starting from existing spreadsheet software, like Lotus 1-23 ©, Excel ©, or Spreadsheet 2000 ©, we propose a sequence of enhancements to fully integrate constraint-based reasoning, culminating in a system for reactive, graphical, mathematical constructions. This is driven by our view of constraints as the essence of (spreadsheet) computation, rather than as an add-on tool for expert users. We c...