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Growth and decay characteristics of the tilt aftereffect were studied for aftereffects induced by normal or continuous adaptation routines, and for aftereffects induced by successive or spaced adaptation to the same or different orientations on an adapt-partial decay-readapt schedule. In the continuous adaptation condition, growth and decay of the(More)
Recently, a new method for estimating epidermal transmission of UV radiation in higher plants has been proposed. The empirical evidence for the usefulness of this method is reviewed here. Direct comparison with spectroscopically determined epidermal transmission yielded equivalent results. A linear correlation to the concentration of epidermal screening(More)
Bistatic hitchhiking radar system concepts have been object for extensive research both for military and civilian applications. Hitchhiking systems are in principle easy to construct and can be used without introducing any interference, or being seen by a possible enemy. This paper addresses how to handle the geometry such systems are faced together with(More)
In multistatic continuous wave radar, the choice of codes and frequencies used for transmission has a strong influence on detection and ease of parameter extraction. The paper describes the various effects of using single and multiple codes in a number of separated transmitters, either with the same or separated carrier frequencies. To visualize some of the(More)
An experimental low cost bistatic hitchhiking radar has been developed at FFI utilizing the transmission of a civilian ATC radar. It uses off-the-shelf components in the receiver to produce close to real time traces of targets of opportunity. The processing enables positioning in 2D with good suppression of nearby clutter by continuously monitoring the(More)
Forward scattering radar system concepts have been the object of extensive research both for military and civilian applications since the 1930s. Forward scattering systems are in principle easy to construct. This paper shows a realization of a forward and back scattering radar system carried out by Forsvarets forskningsinstitutt for the purpose of(More)
"Target Back Propagation Technique" overcomes the problem occurring when radar targets migrate out of the resolution cells during scan integration time for surveillance radars. This paper addresses the technique where the idea is simply to back propagate possible targets with different velocities over the scans selected for integration and then detect the(More)
In bi-/multistatic radar, geometry dependencies are of common occurrence. This is also observed for measurement uncertainties. This paper discusses examples of bi-/multistatic radar systems, their geometry dependencies with respect to measurements and their input to a tracking and fusion system. For one of the systems, four simulated flight paths were used(More)