We present multi-epoch multi-frequency VLBI images of the compact polarized radio structure of the quasar 4C 39.25. Between 1995 and 1999, the total intensity images at 15, 22, and 43 GHz have remained almost unperturbed, while there have been significant changes in the polarized intensity maps together with a related rotation of the polarization angle. These changes in the polarized structure ...

Video image detection systems (VIDS) provide an opportunity to analyse complex traffic scenes that are captured by stationary video cameras. Our work concentrates on the derivation of traffic relevant parameters from vehicle trajectories. This paper examines different procedures for the description of vehicle trajectories using analytical functions. Derived conical sections (circles, ellipses a...

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Background Micropatterning techniques of animal cells have been reported by numerous groups and fall into 6 major classifications (1). There are 1) photolithography, 2) soft lithography, 3) ink jet printing, 4) electron beam writing, 5) electrochemical desorption of self-assembled monolayers, and 6) dielectrophoresis. These six cell micropatterning techniques cannot modulate both the attachment...

The predatory labial strike of dragonfly (Aeschna) larvae could be elicited by an artificial water jet stimulus. The larvae showed fair prey-catching ability even when visually deprived, whereas when deprived of mechanosensory and visual information, the ability decreased sharply. Also, immobilized prey were unable to elicit a strike even from intact larvae. The percentage of labial strike (PLS...