The I. P. C. R. Cyclotron

4 @bullet S C I E N C E & P R a C T I C E P E R S P E C T I V E S — a P R I L 2 0 0 7

Modern imaging techniques enable researchers to observe drug actions and consequences as they occur and persist in the brains of abusing and addicted individuals. This article presents the five most commonly used techniques, explains how each produces images, and describes how researchers interpret them. The authors give examples of key findings illustrating how each technique has extended and ...

e x p e r i m e n t a l a n d a n a l y t i c a l s t u d y o f t h e c y c l i c p e r f o r-m a n c e o f s p e c i a l c o n c e n t r i c b r a c e d f r a m e s

t h e s p e c i a l c o n c e n t r i c a l l y b r a c e d f r a m e (s c b f) i s a c o m m o n t y p e o f s t e e l s t r u c t u r a l s y s t e m f o r r e s i s t i n g l a t e r a l l o a d i n g. t h i s t y p e o f s y s t e m p r o v i d e s t h e r e q u i r e d s t i f f n e s s a n d s t r e n g t h a t r e l a t i v e l y l o w c o s t. d e s i g n c o d e s, b a s e d o n p a s ...

56 S C I E N T I F I C a M E R I C a N a P R I L 2 0 0 6

G R a M M a T I C a L P I C T U R E G E N E R a T I O N

P I   C C  P  M

Hilbert’s original aim, to show the consistency of the use of such ideal elements by finitistic means, which would suffice to eliminate these ideal elements from proofs of purely universal (‘real’) theorems (‘Hilbert’s program’), turned out to be impossible for theories containing a sufficient amount of number theory by K. Gödel’s 2nd incompleteness theorem. Nevetheless, various partial realiza...