On Pillai’s problem with Pell numbers and powers of 2

In this paper, we find all integers c having at least two representations as a difference between a Pell number and a power of 2

Etude du régime alimentaire de la Chouette effraie Tyto alba (Strigiforme,Tytonidae) dans la région de Lalla Mimouna dans la plaine du Gharb, plaine du Maroc atlantique

Nous présentons dans ce travail les résultats de l’analyse du régime alimentaire d’un rapace nocturne (la Chouette effraie Tyto alba) dans les plaines du Maroc atlantique à partir de plusieurs lots de pelotes de réjection collectées en 2012. Il s’agit de deux régions de la plaine du Gharb, une située dans un milieu forestier anthropisé (Sidi Boubker El Haj) et l’autre en plein milieu irrigué et intensément cultivé (domaine des Drader à Moulay Bousselhame). L’étude des pelotes a fournie 1285 proies réparties sur plusieurs groupes zoologiques formants l’essentiel du régime de ce rapace. Les mammifères sont beaucoup plus représentés avec environ 64% de ce régime, les insectes sont représentés avec plus de 27% alors que les oiseaux et les amphibiens forment moins de 10%. Ce régime diffère fortement de celui des effraies des plaines semi-arides du Maroc atlantique (Rihane, 2003, 2004 et 2005) caractérisé par une nette abondance des oiseaux.Mots-clés: régime alimentaire, chouette effraie, Lalla Mimouna , plaine du Gharb, Maroc atlantique. Study of the diet of the Barn Owl Tyto alba (Strigiforme, Tytonidae) in Lalla Mimouna region in the Gharb plain (plain of Atlantic Morocco)We present in this work the results of the analysis of the diet of the Barn owl Tyto alba in the plains of Atlantic Morocco, from several batches of diet pellets collected in 2012. These study covers two regions of the Gharb plain, one located in ananthropized forest (Sidi Boubker El Haj) and the other in the middle irrigated and intensively cultivated (field Drader Moulay Bouselhame). The study of several lots of pellets has provided 1285 prey over several zoological groups making the most of the diet of this predator. Mammals are much more represented with approximately 64% of the diet,the insects are strongly represented with more than 27% while birds and amphibians make up less than 10%. The scheme of this diet differs greatly from that of semi-arid plains of Atlantic Morocco (Rihane, 2003, 2004 and 2005) characterized by a marked abundance of birds.Keywords: diet, barn Owl, Lalla Mimouna, gharb plain, Atlantic Morocco

On Pillai's problem with Pell numbers and powers of 2

In this paper, we find all integers c having at least two representations as a difference between a Pell number and a power of 2

Identifying predation on rodent teeth through structure andcomposition: A case from Morocco.

International audiencePredation by nocturnal birds of prey is one of the most frequent modes leading to the concentration of rodents in fossil assemblages. This mode of accumulation leaves characteristic surface alterations on bones and teeth. In order to evaluate and characterize the effects of these pre-diagenesis alterations on rodent fossil samples, we have carried out microstructural and chemical analyses on incisors collected from present day Moroccan wild animals and owl pellets. The microstructure of both dentine and enamel was well preserved, but chemical changes were evident in pellet samples and depended on the particular tissue and the nature of the predator. The comparison of compositional data obtained from electron microprobe chemical analyses and infrared spectrometry has allowed us to assign a possible predator to an incisor extracted from a pellet of an unknown origin. This method has further implications for the understanding of taphonomy and palaeoecology of archaeological and fossil sites

Systèmes policiers

Le thème du carnet est celui de l'étude de la construction et des recompositions des systèmes policiers européens aux 18e et 19e siècles, en Europe et dans les prolongements territoriaux que constituent les Empires coloniaux européens, dans une approche interdisciplinaire. Par systèmes policiers, on entend des configurations policières particulières qui se nouent et se cristallisent autour de lieux, de situations et d’objets spécifiques. La période des 18e-19e siècles correspond à un moment c..

Taphonomy of Small Predators multi-taxa accumulations: palaeoecological implications

Most small terrestrial vertebrate accumulations in archaeological and palaeontological sites result from predation but we are far from having an exhaustive knowledge of modern predators’ diet, ecological niches and bone modification patterns especially in North African sites. The few neotaphonomic referentials available result from taxon-specialized palaeontologists’ initiatives. A survey of the literature on North Africa predators shows that their prey diversity is high and not only include rodent and shrews but also amphibians, squamates, bats and insects. We performed here a pilot taphonomic study of a Moroccan Tyto alba nest pellets including the whole taxa consumed (birds, rodents, shrews, amphibians, insects). We analyzed bone representation, fragmentation and digestion for each taxa and then compared the results. We observe differences between the taxa but on the whole find higher modification levels for this assemblage compared to roost sites of barn owls from other sites. We used for the comparisons homologous bones like the femur and the humerus and also found differences between the taxa. For example, digestion was lower on amphibians and birds than on micromammals. We discuss here some methodological issues as well as archaeological and palaeoenviromental ones by comparison with the Pleisto-Holocene site of El Harhoura II (Morocco).The taphonomic study was funded by the GDR Taphena 3591 and we thank Jean Philip Brugal for supporting this project as well as the GDR Biogeoarcheodat. The fieldwork was sponsorized by the NSF-RHOI project

Basophil activation test with Pru p 7 is predictive of clinical severity in peach allergic patients: Meeting Abstract: PD0298

International audienc