Background—Fractionated electrograms are used by some as targets for ablation in atrial and ventricular arrhythmias. Fractionation has been demonstrated to result when there is repetitive or asynchronous activation of separate groups of cells within the recording region of a mapping electrode(s). Methods and Results—Using a computer model, we generated tissue activation patterns with increasing...

Evapotranspiration represents the combined loss of soil water from the earth’s surface to the atmosphere through evaporation of water from the soil or plant surfaces and transpiration via stomates of the plant. In agricultural production systems these two losses of water represent a major component of the water balance of the crop. If we examine evapotranspiration over time throughout a growing...

Spatial variation of aerosol properties derived from satellite observations C. Robles González, M. Schaap , G. de Leeuw, P. J. H. Builtjes , and M. van Loon TNO, Physics and Electronics Laboratory, PO-BOX 96864, NL-2509 JG The Hague, The Netherlands TNO, Institute of Environmental Science, Energy Research and Process Innovation, PO-Box 342, NL-7300 AH, Apeldoorn, The Netherlands Utrecht Univers...

Spatial patterns of genetic variation provide information central to many ecological, evolutionary, and conservation questions. This spatial variability has traditionally been analyzed through summary statistics between pairs of populations, therefore missing the simultaneous influence of all populations. More recently, a network approach has been advocated to overcome these limitations. This n...

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