A model for the main observational characteristics of the radio emission of pulsars with well organized drifting subpulses is presented. We propose that drifting subpulses result from the modulation of the radio emission mechanism due to long-wavelength drift waves in the magnetosphere. The drift waves are generated at shorter wavelengths, and their nonlinear evolution favours accumulation in a...

Abstract The Norwegian Coastal Administration registers maritime incidents in waters. Drifting ships and drifting objects may cause serious possible disasters. By analysing ship traffic waters, it is documented that the frequency of has been approximately 0.15% registered transits, or 150–165 cases annually. In addition to a grounding when vessel reaches coastline, increased use ocean space for...

This paper addresses the problem of optimal rate allocation for the macroblock-based Progressive Fine Granularity Scalable (PFGS) video coding. To solve this complicated problem, the error propagation pattern in the macroblock-based PFGS is first investigated. An effective drifting model is established subsequently for estimating the drifting for each enhancement bit stream segment encoded by t...

As the size of a high contrast drifting Gabor patch increases, perceiving its direction of motion becomes harder. However, the same behavioral effect is not observed for a low contrast Gabor patch. Neuronal mechanisms underlying this size-contrast interaction are not well understood. Here using psychophysical methods and functional magnetic resonance imaging (fMRI), we investigated the neural c...

this study examines the effects of change in the concentrations of monovalent and divalent ions in the polymer-contained surfactant solution on the macroscopic behavior of viscous-modified surfactant waterflooding in heavy oil reservoirs. salts that are used in this set of floods were sodium chloride, magnesium chloride, and calcium chloride. the results indicate that four different ranges of s...

Deshpande & Rankin (1999, 2001) claim that the frequency of the very narrow feature, in the spectrum of radio flux variations of PSR B0943+10, is an alias of its actual value. For this, they need to interpret the narrow feature as a very stable pattern of drifting sub pulses on the polar cap of this pulsar, within the framework of the Ruderman & Sutherland (1975) model. This paper discusses sev...

The paper presents a method for gradual forgetting, which is applied for learning drifting concepts. The approach suggests the introduction of a time-based forgetting function, which makes the last observations more significant for the learning algorithms than the old ones. The importance of examples decreases with time. Namely, the forgetting function provides each training example with a weig...

When humans view a moving object, the spatial lag in perception expected from neural delays may be partially corrected by motion mechanisms biasing perceived position. The drifting-Gabor illusion seems to support this view: the perceived location of a static envelope filled with a moving pattern is shifted in the direction of motion. To test whether this shifting mechanism also extrapolates the...