Fact and fiction in alignment

Long-lasting molecular alignment: fact or fiction?

It has been suggested that appropriate periodic sequences of laser pulses can maintain molecular alignment for arbitrarily long times [J. Ortigoso, Phys. Rev. Lett. 93, 073001 (2004)]. These aligned states are found among the cyclic eigenstates of truncated matrix representations of the one-period time propagator U(T,0). However, long time localization of periodic driven systems depends on the ...

Fact and Fiction in Psychology

By H. J. Eysenck. (Penguin, 5s.) This is the third of Professor Eysenck's attempts to bring psychology to the masses but here he rides his hobby-horses almost to extinction. After one chapter in whict1 he describes his own laboratory and the techniques he uses, he goes on to describe his own concepts of Personality. This is followed by a comparison between Behaviour Therapy and Psychoanalysis i...

Sonofusion – Fact or Fiction?

Sonoluminescence and Sonofusion phenomena may occur when vapor bubbles implode. This paper reviews the status of our understanding of the bubble dynamics involved in these interesting phenomena. In particular, the experimental and analytical evidence supporting the observed production of neutrons and tritium due to thermonuclear fusion within imploding bubble clusters is reviewed. Moreover, pot...

NFRs : Fact or Fiction ?

Fact or fiction

Many previous studies have aimed at spermatogenesis of male murine germ cells in vitro, but no efficient system has been established yet that covers the entire process of mammalian spermatogenesis in a culture dish permanently. In this review, we report on the requirements of spermatogenesis and the current state of different culture methods using testicular tissue fragments, single cell suspen...