1. We examined the effect of thermal acclimation on fighting success and underlying performance traits in the crayfish Cherax destructor . We tested the hypothesis that animals will be more successful when fighting at their acclimation temperature than at a colder or warmer temperature, and that changes in metabolic capacity underlie differences in behavioural performance. 2. Thermal acclimatio...

Single unit activity was recorded extracellularly from the midbrain of rats during fighting behavior and during non-fighting control manipulations. Fighting behavior was elicited by footshock or startle stimuli or occurred spontaneously as a result of prior footshock presentations. Seven cells were found in the midbrain reticular formation and central gray which displayed maximum firing rates d...

Abstract: Although military cooperation among rebel groups in multi-party civil wars could help rebels defeat or extract concessions from an incumbent government, violent conflict among rebel groups is empirically prevalent. Why do rebel groups in multi-actor civil wars choose to fight one another? This paper models the strategic dilemma facing rebel groups in multi-party civil wars as an alter...

OBJECTIVES We sought to (1) compare estimates of the prevalence of fighting and weapon carrying among adolescent boys and girls in North American and European countries and (2) assess in adolescents from a subgroup of these countries comparative rates of weapon carrying and characteristics of fighting and injury outcomes, with a determination of the association between these indicators of viole...

Competitive fighting was obtained in pairs of like-sexed laboratory rats by placing a single piece of food into the food hopper following 48 hr. of food deprivation. The fighting was characterized by offensive sideways posture, full aggressive posture, and bite and kick attack. Tests were conducted at 110-120 days of age on pairs of animals that had been housed together since weaning. Fighting ...

Cybercrime is becoming ever more serious. Findings from the 2002 Computer Crime and Security Survey show an upward trend that demonstrates a need for a timely review of existing approaches to fighting this new phenomenon in the information age. In this paper, we define different types of cybercrime and review previous research and current status of fighting cybercrime in different countries tha...

Fighting disease: In the first �eca�es after the intr��ucti�n �f antibi�tics,� there �as �i�es�rea� ��timism that the fi�ht a�ainst infecti�us �isease c�ul� be ��n. This early a�vert f�r �enicillin �as tar�ete� at W�rl� War II servicemen. (Picture: Wiki�e�ia.) F�r a fe� �eca�es,� ar�un� the mi��le �f the 20th century,� there �as �i�es�rea� ��timism that science c�ul� �in the fi�ht a�ainst infec...

A pioneer in the early identification of drug resistance in tuberculosis patients, Sir John Crofton and his colleagues' seminal research into multidrug therapy for tuberculosis patients in the 1950s laid the groundwork for the WHO-recommended tuberculosis treatment today. This is one of the last interviews he gave before he passed away on 3 November at the age of 97, after a career that spanned...

The shapes of sexually selected weapons differ widely among species, but the drivers of this diversity remain poorly understood. Existing explanations suggest weapon shapes reflect structural adaptations to different fighting styles, yet explicit tests of this hypothesis are lacking. We constructed finite element models of the horns of different rhinoceros beetle species to test whether functio...

PURPOSE We hypothesize that adolescents' exposure to violence and personal victimization will be associated with the frequency with which they engage in fighting behaviors. However, adolescents who are future-oriented and goal-directed and from more secure families are hypothesized to report less fighting behavior. METHODS A cross-sectional, anonymous survey was administered to 225 youths (ma...