The d e f i n i t i o n t e x t s of a m a c h i n e r e a d a b l e pocket d i c t i o n a r y were ana lyzed to d e t e r m i n e the d i s a m b i g u a t e d word sense of the k e r n e l terms of each word sense be ing d e f i n e d . The r e s u l t a n t s e t s of word p a i r s of d e f i n e d and d e f i n i n g words were then computaCiona l ly connected i n t o t~o taxonomic semil ...

The s tudy o f v i s i o n , in b o t h man and mach ine , i s v iewed as t h e d i s c o v e r y o f c o n s t r a i n t s . Computa t i o n a l c o n s t r a i n t s o f t e n i m p l y assumpt ions neces sa ry f o r a c h i e v i n g a p r o b l e m ' s s o l u t i o n , w h i l e p s y c h o l o g i c a l and n e u r o p h y s i o l o g i c a l ones r e s t r i c t the manner in wh ich such...

We s tudy the u n i f i c a t i o n and match ing problems in the s igned b i n a r y t r ees t h e o r y . We show t h a t any equa t i on tl1=t2 can be t rans formed i n t o an e q u i v a l e n t one x = t . I f x does not occur in t then (x > t) i s the unique most genera l u n i f i e r i n the theory (up to an isomorph ism) . We apply t h i s technique to f i n d recur rence r e l a t i o...

It is f i t t ing in this b icentennial year of the United States, for the ed i f i ca t ion of oncologists, to cast a glance at what physicians o f the American Revolut ion though t and practiced about cancer . There is no better source of such en l igh tenment than the wri t ings o f Benjamin Rush (1745-1813) of Phi ladelphia. Of English Quaker stock, born in Pennsylvania and educated at Pr i...

Many conditions such as aging, diabetic neuropathy and ischaemic heart disease are assoc ia ted wi th reduc t ions in hear t r a te var iab i l i ty (HRV) . Reduced HRV, in tu rn , has been associated with increased mortality (1) . There has been d iscuss ion of lowered HRV as a potent ia l therapeut ic ta rge t (2) . Trad i t iona l t echniques o f eva lua t ing HRV involve acquis i t ion of c...

I s e v a l u a t i o n , l i k e b e a u t y , i n the eye of the beho lde r? The answer i s f a r from s imple because i t depends on who i s c o n s i d e r e d to be the proper b e h o l d e r . E v a l u a c o r s may range from c a s u a l u s e r s to s o c i e t y as a whole , w i t h s y s tem builders, sophisticated users, linguists, grant providers, sys tem buye r s , and o t h e r s...

Isolated preparat ion are commonly used to study the effect of drugs on specific type of recep tor, fo r b ioassay of d rug , fo r characterization of specific type of receptor or i ts subtypes , for pharmacokinet ic s tudy, to de te rmine concent ra t ion response curve of agonist, to study the antagonism of drug and in new drug discovery (1). The Committee for the purpose of control and super...