The purpose of the present study was to investigate the onset and development of separation protest in a non-Western culture. Forty-two boys and girls distributed over the ages of 9, 12, 18, and 24 months were assessed for reactions to arrivals and departures of their mother, father, and a stranger. The infants were also given a test of object permanence. The results showed that the pattern of ...

One of the most striking phenomena in cognitive development has been the apparent failure of infants to show 'object permanence' in manual reaching tasks although they show evidence for representing hidden objects in studies measuring looking times. We report a neural correlate of object permanence in six-month-old infants: a burst of gamma-band EEG activity over the temporal lobe that occurs d...

In this paper, a delayed ratio-dependent Holling-III predator-prey system with stage-structured and impulsive stocking on predator and continuous harvesting on prey is considered. We obtain sufficient conditions of the global attractivity of prey-extinction periodic solution and the permanence of the system. These results show that the behavior of impulsive stocking on predator plays an importa...

The paper is concerned with nonautonomous generalised Nicholson systems under conditions which imply their permanence: by refining the assumptions for permanence, explicit lower and upper uniform bounds all positive solutions are provided, as well criteria global exponential stability of these systems. In particular, periodic systems, existence a globally exponentially attractive solution deriv...

Results 69 pts (47 years, male 69%, SAPS II 33, mechanical ventilation 92%) developed 77 episodes (M 44, V 32). Neurosurgical diseases were trauma (39%), meningeal hemorrhage (20%), intracerebral hemorrhage (17%), intracranial tumor (12%). Cerebrospinal fluid leakage was present in 25%, ventriculostomy in 35% (catheter permanence 6.2 days), subdural catheter in 30% (catheter permanence 4.2 days...

In this paper, we will address the issues and the challenges for achieving photo-quality output with bi-level digital printing technologies. We will present the case study of transforming a 4-color Hewlett Packard Indigo liquid electrophotographic digital press, into a 6-color printer that can print images that are comparable, in terms of image quality and image permanence, to the traditional p...

This paper is concerned with an almost periodic Volterra integro dynamic equation on time scales. Based on the theory of calculus on time scales, by using differential inequality theory and constructing a suitable Lyapunov functional, sufficient conditions which guarantee the permanence and the global attractivity of the system are obtained. Then, by using the properties of almost periodic func...

Using some known lifting theorems we present three-space property type and permanence results; some of them seem to be new, whereas other are improvements of known facts.