Textural analysis by statistical parameters and its application to the mapping of flow-structures in wetlands

From 1974 to 1977 the application of remote sensing methods in coastal areas and tidal bays and estuaries was investigated on the German coast of the North Sea. Aerial photographs were taken using different films; (1) color, (2) color infrared, and (3) black and white films. Scanner recordings were taken by an 11 channel scanner. Ground truth measurements of radiation and measurements of meteorological elements were carried out. For mapping the morphology in mudflat areas a digital texture analysis was developed, by which measurement of the change of image structures cased by distributing factors, such as changing illumination, is possible

Accumulating regions of winding periodic orbits in optically driven lasers

We investigate the route to locking in class B lasers subject to optically injected light for injection strengths and detunings near a codimension-two saddle-node Hopf point. This is the parameter region where the Adler approximation is not valid and where Yeung and Strogatz recently reported a self-similar cascade of periodic orbits in the case of a solid-state laser. We explain this cascade as an accumulation of large regions bounded by saddle-node bifurcations of periodic orbits, but also containing further bifurcations, such as period-doubling, torus bifurcations and small pockets of chaos. In the vicinity of the simultaneous saddle-node and Hopf bifurcations, successive periodic orbits wind more and more near the point in phase space where the saddle-node bifurcation is about to occur. This leads to a self-similar period-adding cascade. By varying the linewidth enhancement parameter α from zero, the case of a solid-state or C

Show Me The Data: An Evaluation Of Data Access In The JRS Grant Portfolio

In order to be useful for biodiversity conservation and sustainable development, biodiversity information must be not only available, but also accessible.The JRS Biodiversity Foundation contracted an independent study to assess the level to which data produced by JRS-funded projects were discoverable online, and the ease with which those data could be viewed or downloaded. Only about half of the expected data products were viewable or discoverable online, and in many cases data were not clearly connected with project results. Data accessibility was not dependent on the country in which the project was located, and hasn't changed over time. Interviews with grantees helped to identify challenges to and enabling conditions for creating sharable data products. JRS is actively responding to the findings of this study through new planning tools to support future grantees and a data sharing policy that explicitly supports open access to data and data publication to well-recognized and secure repositories