3.5-month-old infants seem to show an understanding of the concept of object permanence when tested through looking-time measures. Why, then, do infants fail to retrieve hidden objects until 8 months? Answers to this question, and to questions of infants' successes and failures in general, depend on one's conception of knowledge representations. Within a monolithic approach to object permanence...

Wetland permanence, the duration and frequency that surface water is present, affects biological communities whether wetlands are protected under legislation in some jurisdictions. drainage Prairie Pothole Region (PPR) has changed distribution of because smaller more temporary likely to be drained. This change biodiversity other wetland ecosystem services. In Manitoba, Canada, treated different...

We consider Banach space properties that lie between conditions introduced by Bynum and Landes. These properties depend on the metric behavior of weakly convergent sequences. We also investigate the permanence properties of these conditions.

Recommended by Leonid Berezansky We propose a discrete predator-prey systems with Beddington-DeAngelis functional response and feedback controls. By applying the comparison theorem of difference equation, sufficient conditions are obtained for the permanence of the system.

A discrete n-species Schoener competition system with time delays and feedback controls is proposed. By applying the comparison theorem of difference equation, sufficient conditions are obtained for the permanence of the system.

Persistence and extinction of a randomized non-autonomous logistic equation is studied. Sufficient conditions for extinction, non-persistence in the mean, weak persistence and stochastic permanence are established. The critical number between weak persistence and extinction is obtained.

The aim of this study was to evaluate the damages caused by Diceraeus (=Dichelops) melacanthus in maize plants subjected bioinoculation with or without imidacloprid seed treatment. In study, five different combinations bioinoculants and treatment were applied seeds a completely randomized design. used Azospirillum brasilense Bradyrhizobium japonicum. From emergence, infestation stink bug D. (on...

Spatiotemporal discontinuity of visual input is a common occurrence in daily life. For example, when a walking person disappears temporarily behind a wall, observers have a clear sense of his physical presence despite the absence of any visual information (movement permanence). To investigate the neural substrates of biological motion permanence, we recorded scalp EEG activity of sixteen subjec...

In this paper we derive spatially explicit equations to describe a stochastic invasion process. Parents are assumed to produce a random number of offspring which then disperse according to a spatial redistribution kernel. Equations for population moments, such as expected density and covariance averaged over an ensemble of identical stochastic processes, take the form of deterministic integro-d...