A recent theory of pigeons' equivalence‐class formation (Urcuioli, 2008) predicts that reflexivity, an untrained ability to match a stimulus to itself, should be observed after training on two “mirror‐image” symbolic successive matching tasks plus identity successive matching using some of the symbolic matching stimuli. One group of pigeons was trained
Sweeney, Mary M, Urcuioli, Peter J
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The pigeon’s concept of pigeon [PDF]
Pigeons were trained to discriminate between the presence and absence of a pigeon in photographic displays projected on a response key. Irrelevant cues were reduced as much as possible, while the differences between the objects were of sufficient variety and complexity to ensure that mastery of the discrimination would require the use of a concept. The
Jean Poole, D. G. Lander
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Dietary habits of urban pigeons (Columba livia) and implications of excreta pH – A review [PDF]
Pigeons are considered to be urban pests, causing untold damage to buildings and potentially impacting the health of humans who come into contact with them or their faeces.
Spennemann, Dirk HR, Watson, Maggie J
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Atopic dermatitis (AD) is a chronic inflammatory skin disease that can cause skin barrier function damage. Although co-incubation with docosahexaenoic acid (DHA) exerts a positive effect on deficient skin models, no studies have investigated the effects ...
Tinghan Jia +4 more
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Pigeon breeders’ lung: pigeon intestinal mucin, an antigen distinct from pigeon IgA [PDF]
SUMMARY Antigens identified by indirect immunofluorescence staining and specific for sera from patients with pigeon breeders’ lung or healthy pigeon breeders, have been isolated from pigeon intestinal mucus. Two antigenic peaks, one pigeon intestinal mucin and the other IgA, were separated by equilibrium centrifugation of water-soluble ...
A, Todd, R M, Coan, A, Allen
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Suitability of leguminous cover crop pollens as food source for the green lacewing Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae). [PDF]
Diversification of crops with species that provide suitable pollen for predators may reduce pest population on crops by enhancing predator effectiveness.
Euzébio, Denise E. +4 more
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Macro vs. Micro Methods in Non-Life Claims Reserving (an Econometric Perspective) [PDF]
Traditionally, actuaries have used run-off triangles to estimate reserve ("macro" models, on agregated data). But it is possible to model payments related to individual claims.
Charpentier, Arthur, Pigeon, Mathieu
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Relevance of skin-prick test and immunoglobulin E estimation in pigeon-exposure asthma patients
Background Pigeon exposure is common in India due to its cultural and religious practice. Hypersensitivity to pigeon allergen is well known as pigeon breeder disease. Limited data also show that pigeon allergen was associated with increased asthma.
Anil K Mavi +4 more
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A multi strategy improved pigeon-inspired optimization algorithm [PDF]
Pigeon-inspired optimization algorithm is easy to fall into local optimization and low convergence accuracy in solving nonlinear optimization problems.
Liao Heng, Huang Huadong
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The tonsils revisited: review of the anatomical localization and histological characteristics of the tonsils of domestic and laboratory animals [PDF]
This paper gives an overview of the anatomical localization and histological characteristics of the tonsils that are present in ten conventional domestic animal species, including the sheep, goat, ox, pig, horse, dog, cat, rabbit, rat, and pigeon ...
Casteleyn, Christophe +3 more
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