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Scenes filled with moving objects are often hierarchically organized: the motion of a migrating goose is nested within the flight pattern of its flock, the motion of a car is nested within the traffic pattern of other cars on the road, the motion of body parts are nested in the motion of the body. Humans perceive hierarchical structure even in stimuli with two or three moving dots. An influenti...

We investigate the use of neural fields for building a distributed behavioral model enabling several agents to move in a flock. No leader is required, and each agent is implemented as an independent element that follows its own behavioral model which is composed of four steering behaviors: separation, cohesion, alignment and obstacle avoidance. The synchronized motion of the flock emerges from ...

This cross-sectional study was conducted to estimate seroprevalence and to identify flock-level factors associated with seropositivity to brucellosis in small ruminants in Kerman province, southeastern Iran. In October-November 2011, serum samples were randomly collected from 1767 sheep and 1233 goats, older than 18 months, from 300 flocks. The sera were initially screened for the presence of a...

In this dissertation, I generalize the relocation analysis of MAC algorithms for Mobile Ad-hoc Network by creating different mobility models. The models of Constrainedjump mobility, Parallel-motion and Flock mobility were implemented in TOSSIM. The Constrained-jump model is used for simulating two versions of a MAC Algorithm [3, 9] and comparing their performance. Two functions are derived from...

The male effect refers to the effect of the introduction of the male on the oestrus cycle of the seasonally anoestrus female. This effect is a neuro-hormonal response that is utilised by flock managers to improve the ovulation rate in females and shorten the breeding season. The introduction of males to the female flock will elicit this response but the use of vasectomised males is a common pra...

In 1965 Knuth [4] showed that from a given finite semifield one can construct further semifields manipulating the corresponding cubical array, and obtain in total six semifields from the given one. In the case of a rank two commutative semifield (the semifields corresponding to a semifield flock) these semifields have been investigated in [1], providing a geometric connection between these six ...

Abstract We investigate the effects of density fluctuations on near-ordering phase a flock by studying Malthusian Toner–Tu theory. Because birth/death process, characteristic this model, are partially suppressed. show that unlike its incompressible counterpart, where absence renders ordering transition similar to second-order transition, in theory may turn from continuous first-order. study mod...