Understanding how animals fight with Lloyd Morgan's canon

Various game theory models have been used to explain animal contests. Here we attend to the presumed cognitive abilities required by these models with respect to information gathering and consequent decision making. Some, such as the hawk/dove game and self-assessment models require very limited cognitive ability. By contrast, the broadly accepted sequential assessment model requires that contestants know their own abilities and compare them with information gathered about their opponent to determine which has the greater resource-holding power. However, evidence for assessment of relative abilities is sparse and we suggest that this complex ability is probably beyond most animals. Indeed, perceptual limitations may restrict information about an individual's own displays and thus preclude comparison. We take a parsimonious view and conclude that simple summation of causal factors accounts for changes in fight motivation without requiring mutual evaluation of relative abilities. © 2012 The Association for the Study of Animal Behaviour.

Signal Reception Characteristics in the Proximity of Alice and Bob for Secure Indoor Peer-to-Peer Communications At 2.45 GHz

Mutual variation of the received signal which occurs as a consequence of the channel reciprocity property has recently been proposed as a viable method for secret key generation. However, this cannot be strictly maintained in practice as the property is applicable only in the absence of interference. To ensure the propagation defined key remains secret, one requirement is that there remain high degrees of uncertainty between the legitimate users channel response and that of any eavesdropper's. In this paper, we investigate whether such de-correlation occurs for an indoor point-to-point link at 2.45 GHz. This is achieved by computing the localized correlation coefficient between the simultaneous channel response measured by the legitimate users and that of multiple distributed eavesdroppers for static and dynamic scenarios.

Entre Nós : entrevista a Alice Vieira

Emissões - Entre Nós

Entre Nós : entrevista a Alice Vieira

Emissões Entre-Nós

Mme [Alice] Milliat [présidente de la Fédération des Sociétés Féminines Sportives de France] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 58520

Mme [Alice] Milliat [présidente de la Fédération des Sociétés Féminines Sportives de France] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 58521

M. Lloyd George à la conférence [interalliée] de Boulogne-sur-Mer [21 juin 1920, revue des troupes] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59796

[5-7-20, conférence de] Spa, [M. François-Marsal], Lloyd George, [Léon] Delacroix, [le comte Sforza, M.] Millerand, [et M. Le Trocquer] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59942

5-7-20, Spa, délégués interalliés [dont] M. Lloyd George [et M. Léon Delacroix] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59940