Results 41 to 50 of about 51,290 (303)
Nature CommunicationsAbstract Understanding how group-level dynamics arise from individual interactions re- mains a core challenge in collective behavior research. Traditional models assume that animals follow simple behavioral rules, like explicitly aligning with neighbors, yet experimental support for such interactions is often lacking. Here we consider a
Mohammad Salahshour, Iain D. Couzin
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European Journal of Combinatorics, 1994 Let \(K\) be the quadratic cone of \(PG (3,q)\) with vertex \(v = (0,0,0,1)\) and equation \(X_0 X_1 = X_2^2\). A flock \(F\) of \(K\) is a partition of \(K \backslash \{v\}\) into \(q\) disjoint irreducible conics. Associated to each flock \(F\) is a translation plane \(T(F)\) of order \(q^2\) and dimension at most two over its kernel.
BADER, LAURA, LUNARDON, GUGLIELMO
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High frequency of chlamydial co-infections in clinically healthy sheep flocks
BMC Veterinary Research, 2011 Background The epidemiological situation of ovine chlamydial infections in continental Europe, especially Germany is poorly characterised. Using the German state of Thuringia as a model example, the chlamydial sero- and antigen prevalence was estimated ...
Sachse Konrad +7 more
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AgricultureDevelopment of any trait-directed selection strategy requires basic knowledge about some important population-specific parameters such as the effective population size Ne and genetic connectedness among flocks.
Marija Špehar +5 more
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Antimicrobial Use in On-Farm Hatching Systems vs. Traditional Hatching Systems: A Case Study
Animals, 2023 On-farm hatching is a relatively new method in the broiler industry, in which fertilized broiler eggs are transported to the farms at the stage of 17–19 days of incubation. Once hatched, the broiler chicks have direct access to feed and water.
Julia G. Jerab +6 more
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Computational Geometry, 2006 The authors discuss algorithms to detect flocks in moving objects. They start with a set of \(n\) identities in the plane and the position of the entities at time steps \(t_1,\dots, t_\tau\). It is supposed that these time steps are taken synchronously for all the identities and that the movement between the steps is linear at constant speed.
Marc Benkert +3 more
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Average age of infected flocks versus average age of examined flocks.
, 2022 Average age of infected flocks versus average age of examined flocks.
Magdalena Siedlecka (12915175) +3 more
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Animals, 2021 The contribution of abortions to the overall mortality of lambs born to maiden (primiparous) ewes in Australia remains unclear. This cohort study aimed to quantify abortion and lamb mortality for ewe lambs and maiden Merino two-tooth ewes. Lamb mortality
Thomas Clune +11 more
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Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations
Pediatric Blood &Cancer, EarlyView.ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan +18 more
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The Convergence of Bird Flocking [PDF]
Journal of the ACM, 2014 We bound the time it takes for a group of birds to stabilize in a standard flocking model. Each bird averages its velocity with its neighbors lying within a fixed radius. We resolve the worst-case complexity of this natural algorithm by providing asymptotically tight bounds on the time to equilibrium.
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