c a r e d a t a b a s e s , p o t e n t i a l l y o v e r c o m i n g o b s t a c l e s ar is ing from the n u m b e r of cases , miss ing data , v a r i a b l e s e l e c t i o n , m u l t i c o l l i n e a r i t y , s p e c i f i c a t i o n o f i m p o r t a n t i n t e r a c t i o n s , a n d s e n s i t i v i t y t o erroneous values. On a n actual database derived f rom p a t i e n t s h ...

1. Given topological spaces X and Fand two continuous mappings ƒ o and jfi from X to F (denoted by fo, fi : X—> F) we say that ƒ o is homotopic to jfi (denoted by fo—fi) if there exists a continuous family of continuous mappings ht: X—+Y for O^t^l such that ho=fo and h =/ i . Intuitively fo<^fi if the map ƒ o can be continuously deformed into the map jfi. I t is easily seen [4; 7] that the rela...

This study m easured the extent to which the following four groups of Ss e^qperienced the M ueller-Lyer illusion: a group of ten congenital blind, ten Ss blinded in adulthood, ten sighted blindfolded Ss presented the illusion haptically, and ten sighted Ss presented the illusion visually. All of the groups experienced the illusion to a significant extent. The extent of illusion in the sighted h...

We report on the response characteristics of plasmonic terahertz field-effect transistors (TeraFETs) fed with femtosecond and picosecond pulses. Varying pulse width (tpw) from 10-15 s to 10-10 under a constant input power condition revealed two distinctive detection modes. In short mode (tpw << L/s, where L is gated channel length, plasma velocity), source-to-drain voltage sharp oscillatory dec...