Expediente 31

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Neuro 31

Down syndrome is the most frequent genetic cause of mental retardation. Although usually presenting dysmorphic features and organ malformations, it is rarely associated with congenital hydrocephalus. The case of male neonate whose hydrocephalus was detected since the pregnancy and was discovered to have the syndrome at birth is reported. Chromosomal analysis confirmed the genetic disorder, and ...

Number 31

Last year, when d~cussing the 1979 Nobel prizewinners, we introduced a new term-of Nobel class. 1 One major indicator that a scientist is of Nobel class is the publication of several papers of high impact. More often than not, when consistently cited for a long period, such papers can be identified with major breakthroughs. Let’s see whether this is true of the 1980 Nobel prizewinners, and if n...

31 Motion

Motion is ubiquitous in the physical world, yet its study is much less developed than that of another common physical modality, namely shape. While we have several standardized mathematical shape descriptions and even entire disciplines devoted to that area, such as Computer-Aided Geometric Design (CAGD), the state of formal motion descriptions is still in flux. This in part because motion desc...

-"""'-"- 31 5

that by enlarging the memory and processing more data as they come in, an acceleration of the rate of convergence can be obtaine~. The probabilistic search procedure presented here does not have these disadvantages. After proving the optimality of our procedure, both the convergence as it is defined for other random search procedures [14]-[16] and the convergences of state functions of interest...