For example, rats will work for the opportunity to engage another rat in a fight (Myer & White, 1965, Animal Behaviour, 13, 430-433) or in affiliative play (Humphreys & Einon, 1981, Anim Behav, 29, 259-270), and in unfamiliar settings adult males will engage in a form of play that incorporates elements of aggression (Smith et al. 1999, Aggress Behav, 25, 141-152).
Koestler "describes laughing as a 'luxury reflex,' " Mr. Johnson writes, "containing elements of aggression and hostility, even savagery".
Costa has worked hard to bring an extra element of aggression to his game, and initially Ferrero simply could not live with him.
Criminal sexual behaviors by definition contain an element of aggression and coercion (Dalton et al. 1998).
At its highest points, I did feel a thrill and some joy wondering if pain or pleasure would come next, the resistance of physical restraint, and an element of aggression and hunger added to my previously conventional sex life.
The element of male aggression that was such a powerful force in those films, and an integral aspect of Mr. von Trier's creative personality, has been neutralized here.
A total of 59 (approximately 35%) of the P-element insert lines exhibited levels of aggression that differed significantly from the control; 27 lines were less aggressive, and 32 lines were more aggressive than the control line (Table 1, Figure 1).
As a matter of law, Tony Blair can never face war crimes charges at the International Criminal Court because the elements of crime for the crime of aggression have not been agreed (G2, 27 February).
The question becomes: how should law accommodate the wealth of information regarding these elements of mind that the science of aggression increasingly makes available?
The P-element insertions in Actin 5C (Act5C), extra macrochaetae (emc), CG32572, and Syntaxin 4 (Syx4) were associated with decreased levels of aggression; while P-element insertions in pxb, echinoid (ed), sugarless (sgl), CG3638, and CG13377 were associated with increased levels of aggression.
Thus, our data have begun to unravel the evolution of the mechanistic underpinnings of reproductive inhibition in workers, and that in some cases this may be built on fundamental elements of solitary behavior, such as aggression.
